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DEPICTS THE FIRST FOUR YEARS OF CONSTRUCTION AT GLEN CANYON DAM ON THE COLORADO RIVER IN NORTHEN ARIZONA, COVERING THE BRIDGE, THE DIVERSION OF THE COLORADO RIVER,AND THE POURING OF THE FIRST CONCRETE.
Originally a public domain film from the National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Glen_Canyon_Dam
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Glen Canyon Dam is a concrete arch-gravity dam on the Colorado River in northern Arizona, United States, near the town of Page. The 710-foot (220 m) high dam was built by the U.S. Bureau of Reclamation (USBR) from 1956 to 1966 and forms Lake Powell, one of the largest man-made reservoirs in the U.S. with a capacity of 27 million acre feet (33 km3). The dam is named for Glen Canyon, a series of deep sandstone gorges now flooded by the reservoir; Lake Powell is named for John Wesley Powell, who in 1869 led the first expedition to traverse the Colorado's Grand Canyon by boat.
A dam in Glen Canyon was studied as early as 1924, but these plans were initially dropped in favor of the Hoover Dam (completed in 1936) which was located in the Black Canyon. By the 1950s, due to rapid population growth in the seven U.S. and two Mexican states comprising the Colorado River Basin, the Bureau of Reclamation deemed the construction of additional reservoirs necessary. Contrary to popular belief, Lake Powell was not the result of negotiations over the controversial damming of the Green River within Dinosaur National Monument at Echo Park; the Echo Park Dam proposal was abandoned due to nationwide citizen pressure on Congress to do so. The Glen Canyon Dam remains a central issue for modern environmentalist movements. Beginning in the late 1990s, the Sierra Club and other organizations renewed the call to dismantle the dam and drain Lake Powell in Lower Glen Canyon. Today, Glen Canyon and Lake Powell are managed by the U.S. Department of the Interior within Glen Canyon National Recreation Area.
Since first filling to capacity in 1980, Lake Powell water levels have fluctuated greatly depending on water demand and annual runoff. Operation of Glen Canyon Dam helps ensure an equitable distribution of water between the states of the Upper Colorado River Basin (Colorado, Wyoming, and most of New Mexico and Utah) and the Lower Basin (California, Nevada and most of Arizona). During years of drought, Glen Canyon guarantees a water delivery to the Lower Basin states, without the need for rationing in the Upper Basin. In wet years, it captures extra runoff for future use. The dam is also a major source of hydroelectricity, averaging over 4 billion kilowatt hours per year. The long and winding Lake Powell, known for its scenic beauty and recreational opportunities including houseboating, fishing and water-skiing, attracts millions of tourists each year to the Glen Canyon National Recreation Area.
In addition to its flooding of the scenic Glen Canyon, the dam's economic justification was questioned by some critics. It became "a catalyst for the modern environmental movement," and was one of the last dams of its size to be built in the United States. The dam has been criticized for the large evaporative losses from Lake Powell and its impact on the ecology of the Grand Canyon, which lies downstream; environmental groups continue to advocate for the dam's removal. Water managers and utilities state that the dam is a major source of renewable energy and provides a vital defense against severe droughts...
2020-12-16 21:08:28 +0000 UTC
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"Edited highlights of film footage transferred to HDTV by the Discovery Channel for their NASA Greatest Missions Mercury, Gemini and Apollo programs."
Originally a public domain film from the NASA, slightly cropped to remove uneven edges, with the aspect ratio corrected, and mild video noise reduction applied.
Silent.
http://en.wikipedia.org/wiki/Project_Mercury
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Project Mercury was the first human spaceflight program of the United States, running from 1959 through 1963. The early highlight of the Space Race, its goal was to put a solo human into Earth orbit and return him safely, ideally before the Soviet Union. Taken over from the US Air Force by the newly created civilian space agency NASA, it spanned twenty unmanned developmental missions involving test animals, and successful missions completed by six of the seven Mercury astronauts.
The Space Race had begun with the 1957 launch of the Soviet satellite Sputnik 1. This came as a shock to the American public, and led to the creation of NASA to expedite existing U.S. space exploration efforts, and place most of them under civillian control. After the successful launch of the Explorer 1 satellite in 1958, manned spaceflight became the next goal.
The Soviets put the first human, cosmonaut Yuri Gagarin, into a single orbit aboard Vostok 1 in April 1961. Shortly after this, on May 5, the US launched its first astronaut, Alan Shepard, on a suborbital flight. Soviet Gherman Titov followed with a day-long orbital flight in August, 1961. The U.S. reached its orbital goal on February 20, 1962, when John Glenn made three orbits around the Earth. When Mercury ended in May 1963, both nations had sent six people into space, but the USA was still behind the Soviets in terms of time spent in space.
The cone-shaped Mercury capsule was produced by McDonnell Aircraft, and carried supplies of water, food and oxygen for about one day in a pressurized cabin. Mercury flights were launched from Cape Canaveral, Florida, on modified Redstone or Atlas D missiles. The capsule was fitted with an escape rocket to carry it safely away from the launch rocket in case of a failure of the latter. The flight was designed to be controlled from the ground via the Manned Space Flight Network, a system of tracking and communications stations; back-up controls were outfitted onboard. Small retrorockets were used to bring the spacecraft out of its orbit, after which an ablative heat shield protected the spacecraft from the heat of reentry into Earth's atmosphere. Finally, a parachute slowed the craft for a water landing. Both astronaut and capsule were recovered by helicopter deployed from the nearest suitable U.S. Navy ship.
The program took its name was taken from the wing-footed, fleet god of travel in Roman mythology, and is estimated to have cost $1.73 billion (current prices) and to have involved the work of 2 million people. The astronauts were collectively known as the "Mercury Seven", and each spacecraft was named with a "7" at the end for good luck.
After a slow start riddled with humiliating mistakes, the Mercury Project gained popularity, its missions followed by millions on radio and TV around the world. Its success laid the groundwork for Project Gemini, which carried two astronauts in each capsule and perfected space docking maneuvers essential for lunar travel, and the subsequent Apollo Moon-landing program announced a few weeks after the first manned Mercury flight...
The Mercury spacecraft design was modified three times by NACA/NASA between 1958 and 1959. After bidding by potential contractors had been completed NASA selected in November 1958 the design submitted as "C". After it failed a test flight in July 1959 a final configuration, "D", emerged....
The spacecraft were produced at McDonnell Aircraft, St. Louis, Missouri in clean rooms and tested in vacuum chambers at the McDonnell plant. The spacecraft had close to 600 subcontractors, such as Garrett AiResearch which built the spacecraft's environmental control system. Final quality control and preparations of the spacecraft were made at Hangar S at Cape Canaveral. NASA ordered 20 production spacecraft, numbered 1 through 20. Five of the 20, Nos. 10, 12, 15, 17, and 19, were not flown...
2020-12-16 21:07:50 +0000 UTC
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STAFF FILM REPORT 67-2
VIETNAM - NOVEMBER AND DECEMBER 1966 - 1ST INFANTRY DIVISION, 6TH PSYCHOLOGICAL OPERATIONS BATTALION...
Originally a public domain film from the National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Vietnam_Television_(1966–75)
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Vietnam Television (Vietnamese: Đài Truyền hình Việt Nam, abbreviated THVN), also known as Saigon Television (Đài Truyền hình Sài Gòn) or Channel 9 (Đài số 9), was one of two national television broadcasters in South Vietnam from February 7, 1966, until just before the Fall of Saigon on April 29, 1975. It was the first television broadcaster in Vietnam. It was operated by the Vietnamese Bureau of Television (Nha Vô tuyến Truyền hình Việt Nam), part of the General Department of Radio, Television, and Cinema (Tổng cuộc Truyền thanh, Truyền hình và Điện ảnh) in the Ministry of Propaganda. Vietnam Television broadcast from the capital Saigon on channel 9 (4.5 MHz) in FCC-standard black and white. The other national broadcaster was the English-language Armed Forces Vietnam Network or NWB-TV on channel 11. Both channels used an airborne transmission relay system from airplanes flying at high altitudes, called Stratovision, as part of Operation Blue Eagle.
Vietnam Television's final programming aired the evening of April 29, 1975. The next day, the station was reconstituted as Saigon Liberation Television (Đài truyền hình Sài Gòn Giải phóng, SGTV) with a live broadcast of South Vietnamese President Dương Văn Minh's surrender. SGTV became Ho Chi Minh City Television on May 1, 1975...
https://en.wikipedia.org/wiki/4th_Psychological_Operations_Group
2020-12-15 19:59:22 +0000 UTC
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Originally a public domain film from the National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Operation_Hardtack_I
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Operation Hardtack I was a series of 35 nuclear tests conducted by the United States from April 28 to August 18 in 1958 at the Pacific Proving Grounds. At the time of testing, the Operation Hardtack I test series included more nuclear detonations than the total of all prior nuclear explosions in the Pacific Ocean. These tests followed the Project 58/58A series, which occurred from 1957 December 6 to 1958, March 14, and preceded the Operation Argus series, which took place in 1958 from August 27 to September 6.
Operation Hardtack I was directed by Joint Task Force 7 (JTF 7). JTF-7 was a collaboration between the military and many civilians, but was structured like a military organization. Its 19,100 personnel were composed of members of the US military, federal civilian employees, as well as workers affiliated with the Department of Defense (DOD) and the Atomic Energy Commission (AEC).
There were three main research directions. The first was the development of new types of nuclear weapons... The final avenue of study was to analyze high-altitude nuclear tests to refine the detection of high-altitude nuclear tests and investigate defensive practices for combatting ballistic missiles. This research direction was composed of three individual tests and were the first high-altitude tests. The individual tests in the series were Orange, Teak, and Yucca. Orange and Teak were known collectively as Operation Newsreel and were rocket boosted. Yucca reached its altitude utilizing balloons...
Operation Hardtack I contained three high-altitude tests that were designed to study many effects that a nuclear explosion would have on materials and electronic systems. They were also used to test the energy of the explosion and what forms of energy they would produce. Yucca was the name of the first high-altitude test and it was performed near the Enewetak Atoll in the Marshall Islands. The other two high-altitude tests, Orange and Teak, were performed near the Johnston Atoll in the South Pacific Ocean about 1,300 kilometers southwest of the Hawaiian Islands...
Yucca was the first high-altitude test performed during Operation Hardtack I and was detonated on April 28, 1958. It was lifted by a balloon to an altitude of 86,000 feet (26.2 km) and had a yield of 1.7 kilotons. To achieve the altitude needed, the device was attached to a large helium-filled balloon which carried it to the detonation altitude...
The Teak test was launched from Johnston Island on July 31, 1958 and carried a payload of 3.8 megatons. Teak was the second high-altitude test after the success of Yucca. Instead of a balloon, the warhead for the Teak test would be carried by a Redstone missile; a modified Redstone missile had been used to launch Explorer I in January of the same year. Other nuclear weapons had been tested using the Redstone missile, but until this time the highest payload to have been detonated was 3 kilotons during Operation Teapot. Teak would be the first high-altitude test to have a payload in the megaton range. The test was scheduled to take place from the Bikini Atoll. Due to the fact that the payloads of Teak and Orange were much larger than previous high-altitude shots, the test was moved to Johnston Island as to protect nearby native islanders from any retinal damage...
At 11:47 PM on July 31 Teak was launched; after 3 minutes it was detonated. Due to programming issues, the warhead detonated directly above Johnston Island. At time of detonation the rocket had flown to an altitude of 76.2 kilometers (47.3 mi). The explosion could be seen from Hawaii 1,297 kilometers (806 mi) away and was said to be visible for almost half an hour. After the explosion, high frequency long distance communication was interrupted across the Pacific. Due to this communication failure Johnston Island was unable to contact their superiors to advise of the test results until about eight hours after the detonation...
Orange was launched twelve days after Teak on August 11, 1958. Orange, like Teak, was launched using a Redstone Missile and had a yield of 3.8 megatons...
2020-12-15 19:58:50 +0000 UTC
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"Group of high school boys who have a workshop and laboratory of their own learn, from a transport pilot who befriends them, that studies their teachers want them to learn are important, too; an aviator or any man in the modern world needs to know geometry, physics, geography, and all the other school subjects." Produced by Jam Handy.
Originally a public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Douglas_DC-3
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
The Douglas DC-3 is a propeller-driven airliner which had a lasting effect on the airline industry in the 1930s/1940s and World War II. It was developed as a larger, improved 14-bed sleeper version of the Douglas DC-2. It is a low-wing metal monoplane with conventional landing gear, powered by two radial piston engines of 1,000–1,200 hp (750–890 kW). (Although most DC-3s flying today use Pratt & Whitney R-1830 Twin Wasp engines, many DC-3s built for civil service originally had the Wright R-1820 Cyclone.) The DC-3 has a cruise speed of 207 mph (333 km/h), a capacity of 21 to 32 passengers or 6,000 lbs (2,700 kg) of cargo, and a range of 1,500 mi (2,400 km), and can operate from short runways.
The DC-3 had many exceptional qualities compared to previous aircraft. It was fast, had a good range, was more reliable, and carried passengers in greater comfort. Before the war, it pioneered many air travel routes. It was able to cross the continental US from New York to Los Angeles in 18 hours and with only 3 stops. It is one of the first airliners that could profitably carry only passengers without relying on mail subsidies.
Following the war, the airliner market was flooded with surplus transport aircraft and the DC-3 was no longer competitive due to its size and speed. It was made obsolete on main routes by more advanced types such as the Douglas DC-4 and Lockheed Constellation, but the design proved adaptable and useful on less glamorous routes.
Civil DC-3 production ended in 1942 at 607 aircraft. Military versions, including the C-47 Skytrain (the Dakota in British RAF service), and Soviet- and Japanese-built versions, brought total production to over 16,000. Many continue to see service in a variety of niche roles: 2,000 DC-3s and military derivatives were estimated to be still flying in 2013; a 2017 article put the number at that time at more than 300...
2020-12-15 03:34:30 +0000 UTC
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Silent, soundtrack missing. 'This film... originally had sound and was produced and narrated by the radio world travel radio commentator Deane Dickason. Interesting silent portrait of cultural life in the East Indies during Dutch colonialism.'
Originally a public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
https://en.wikipedia.org/wiki/Java
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Java is an island of Indonesia, bordered by the Indian Ocean on the south and the Java Sea on the north. With a population of over 141 million (Java only) or 145 million (including the inhabitants of its surrounding islands), Java constitutes 56.7 percent of the Indonesian population and is the world's most-populous island. The Indonesian capital city, Jakarta, is on its northwestern coast. Much of the well-known part of Indonesian history took place on Java. It was the centre of powerful Hindu-Buddhist empires, the Islamic sultanates, and the core of the colonial Dutch East Indies. Java was also the center of the Indonesian struggle for independence during the 1930s and 1940s. Java dominates Indonesia politically, economically and culturally. Four of Indonesia's eight UNESCO world heritage sites are located in Java: Ujung Kulon National Park, Borobudur Temple, Prambanan Temple, and Sangiran Early Man Site.
Formed mostly as the result of volcanic eruptions from geologic subduction between the Sunda Plate and Australian Plate, Java is the 13th largest island in the world and the fifth largest in Indonesia by landmass at about 138,800 square kilometres (53,600 sq mi). A chain of volcanic mountains forms an east–west spine along the island. Four main languages are spoken on the island: Javanese, Sundanese, Madurese, and Betawi where Javanese and Sundanese is the most spoken; it is the native language of about 60 million Javanese people in Indonesia, most of whom live on Java. Only two ethnic groups are native to the island—the Javanese in the central and eastern parts and Sundanese in the western. Most residents are bilingual, speaking Indonesian (the official language of Indonesia) as their first or second language. While the majority of the people of Java are Muslim, Java's population comprises people of diverse religious beliefs, ethnicities, and cultures.
Java is divided into four administrative provinces Banten, West Java, Central Java, and East Java, and two special regions, Jakarta and Yogyakarta...
https://en.wikipedia.org/wiki/Sumatra
Sumatra is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the sixth-largest island in the world at 473,481 km2 (182,812 mi.2), not including adjacent islands such as the Simeulue, Nias, Mentawai, Enggano, Riau Islands, Bangka Belitung and Krakatoa archipelago.
Sumatra is an elongated landmass spanning a diagonal northwest–southeast axis. The Indian Ocean borders the west, northwest, and southwest coasts of Sumatra, with the island chain of Simeulue, Nias, Mentawai, and Enggano off the western coast. In the northeast, the narrow Strait of Malacca separates the island from the Malay Peninsula, which is an extension of the Eurasian continent. In the southeast, the narrow Sunda Strait, containing the Krakatoa Archipelago, separates Sumatra from Java. The northern tip of Sumatra borders the Andaman Islands, while off the southeastern coast lie the islands of Bangka and Belitung, Karimata Strait and the Java Sea. The Bukit Barisan mountains, which contain several active volcanoes, form the backbone of the island, while the northeastern area contains large plains and lowlands with swamps, mangrove forest and complex river systems. The equator crosses the island at its centre in West Sumatra and Riau provinces. The climate of the island is tropical, hot, and humid. Lush tropical rain forest once dominated the landscape.
Sumatra has a wide range of plant and animal species but has lost almost 50% of its tropical rainforest in the last 35 years. Many species are now critically endangered, such as the Sumatran ground cuckoo, the Sumatran tiger, the Sumatran elephant, the Sumatran rhinoceros, and the Sumatran orangutan. Deforestation on the island has also resulted in serious seasonal smoke haze over neighbouring countries, such as the 2013 Southeast Asian haze which caused considerable tensions between Indonesia and affected countries Malaysia and Singapore...
2020-12-15 03:33:31 +0000 UTC
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Originally a public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Seat_belt
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
A seat belt (also known as a safety belt) is a vehicle safety device designed to secure the driver or a passenger of a vehicle against harmful movement that may result during a collision or a sudden stop. A seat belt reduces the likelihood of death or serious injury in a traffic collision by reducing the force of secondary impacts with interior strike hazards, by keeping occupants positioned correctly for maximum effectiveness of the airbag (if equipped) and by preventing occupants being ejected from the vehicle in a crash or if the vehicle rolls over.
When in motion, the driver and passengers are traveling at the same speed as the car. If the driver makes the car suddenly stop or crashes it, the driver and passengers continue at the same speed the car was going before it stopped. A seatbelt applies an opposing force to the driver and passengers to prevent them from falling out or making contact with the interior of the car (especially preventing contact with, or going through, the windshield). Seatbelts are considered Primary Restraint Systems (PRS), because of their vital role in occupant safety...
An analysis conducted in the United States in 1984 compared a variety of seat belt types alone and in combination with air bags. The range of fatality reduction for front seat passengers was broad, from 20% to 55%, as was the range of major injury, from 25% to 60%...
History
Seat belts were invented by English engineer George Cayley to use on his glider, in the mid-19th century.
By 1950, almost every race-car driver used safety seat belts.
In 1946, Dr. C. Hunter Shelden opened a neurological practice at Huntington Memorial Hospital in Pasadena, California. In the early 1950s, Dr. Shelden made a major contribution to the automotive industry with his idea of retractable seat belts... To reduce the high level of injuries he was seeing, he proposed, in late 1955, retractable seat belts, recessed steering wheels, reinforced roofs, roll bars, automatic door locks, and passive restraints such as the air bag. Subsequently, in 1966, Congress passed the National Traffic and Motor Vehicle Safety Act requiring all automobiles to comply with certain safety standards.
American car manufacturers Nash (in 1949) and Ford (in 1955) offered seat belts as options, while Swedish Saab first introduced seat belts as standard in 1958. After the Saab GT 750 was introduced at the New York Motor Show in 1958 with safety belts fitted as standard, the practice became commonplace.[9] Seatbelts were not popular at first, with only 2% of Ford buyers choosing to pay for a seatbelt in 1956.
Glenn Sheren, of Mason, Michigan, submitted a patent application on March 31, 1955 for an automotive seat belt and was awarded US Patent 2,855,215 in 1958. This was a continuation of an earlier patent application that Mr. Sheren had filed on September 22, 1952.
However, the first modern three-point seat belt (the so-called CIR-Griswold restraint) used in most consumer vehicles today was patented in 1955 U.S. Patent 2,710,649 by the Americans Roger W. Griswold and Hugh DeHaven.
Vattenfall, the Swedish national electric utility... started to develop a seat belt. Their work was presented to Swedish manufacturer Volvo in the late 1950s, and set the standard for seat belts in Swedish cars. The three-point seatbelt was developed to its modern form by Swedish inventor Nils Bohlin for Volvo—who introduced it in 1959 as standard equipment. In addition to designing an effective three-point belt, Bohlin demonstrated its effectiveness in a study of 28,000 accidents in Sweden. Unbelted occupants sustained fatal injuries throughout the whole speed scale, whereas none of the belted occupants were fatally injured at accident speeds below 60 mph. No belted occupant was fatally injured if the passenger compartment remained intact. Bohlin was granted U.S. Patent 3,043,625 for the device.
The world's first seat belt law was put in place in 1970, in the state of Victoria, Australia, making the wearing of a seat belt compulsory for drivers and front-seat passengers...
2020-12-13 21:36:56 +0000 UTC
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Originally a public domain film from, NASA slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
http://en.wikipedia.org/wiki/Project_Gemini
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Project Gemini was the second human spaceflight program of NASA, the civilian space agency of the United States government. Project Gemini was conducted between projects Mercury and Apollo, with ten manned flights occurring in 1965 and 1966.
Its objective was to develop space travel techniques in support of Apollo, which had the goal of landing men on the Moon. Gemini achieved missions long enough for a trip to the Moon and back, perfected extra-vehicular activity (working outside a spacecraft), and orbital maneuvers necessary to achieve rendezvous and docking. All manned Gemini flights were launched from Cape Canaveral, Florida using the Titan II GLV launch vehicle...
NASA selected McDonnell Aircraft, which had been the prime contractor for the Project Mercury capsule, to build the Gemini capsule in 1961 and the first capsule was delivered in 1963. The spacecraft was 19 feet long and 10 feet wide with a launch weight of 8,490 pounds. The Gemini capsule first flew with a crew on March 23, 1965.
Gemini was the first manned spacecraft to include an onboard computer, the Gemini Guidance Computer, to facilitate management and control of mission maneuvers. Unlike the Mercury, it used ejection seats, in-flight radar and an artificial horizon—devices similar to those used in the aviation industry.
Unlike Mercury, which could only rotate around the axes of pitch, yaw, and roll to change its orientation in space, the Gemini spacecraft was designed also to translate in all three perpendicular axes (forward/backward, left/right, up/down), and also to alter its orbital inclination and altitude. It used these capabilities to dock with the Agena target vehicle, which had its own rocket engine which could be used to perform larger altitude changes.
A major difference between the Gemini and Mercury spacecraft was that Mercury had all systems other than the reentry rockets situated within the capsule, most of which were accessed through the astronaut's hatchway. In contrast, Gemini housed power, propulsion, and life support systems in a detachable Equipment Module located behind the Reentry Module, which made it similar to the Apollo Command/Service Module design. Many components in the capsule itself were reachable through their own small access doors.
The original intention was for Gemini to land on solid ground instead of at sea, using a Rogallo wing rather than a parachute, with the crew seated upright controlling the forward motion of the craft. To facilitate this, the airfoil did not attach just to the nose of the craft, but to an additional attachment point for balance near the heat shield. This cord was covered by a strip of metal which ran between the twin hatches. This design was ultimately dropped, and parachutes were used to make a sea landing as in Project Mercury. The capsule was suspended at an angle closer to horizontal, so that a side of the heat shield contacted the water first. This eliminated the need for the landing bag cushion used in the Mercury capsule.
Early short-duration missions had their electrical power supplied by batteries; later endurance missions used the first fuel cells in manned spacecraft...
There were 2 unmanned Gemini flights in 1964 and 1965, followed by 10 manned flights in 1965 and 1966. All were launched by Titan II launch vehicles...
2020-12-13 21:36:21 +0000 UTC
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Silent (soundtrack missing).
Originally a public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
https://en.wikipedia.org/wiki/Electric_stove
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
An electric stove or electric range is a stove with an integrated electrical heating device to cook and bake. Electric stoves became popular as replacements for solid-fuel (wood or coal) stoves which required more labor to operate and maintain. Some modern stoves come in a unit with built-in extractor hoods.
The stove's "electric coil" may be controlled by a rotary switch with a finite number of positions (for example, six), each of which engages a different combination of resistances and hence a different heating power, or may have an "infinite switch" called a simmerstat. Some may have a thermostat...
On September 20, 1859, George B. Simpson was awarded US patent #25532 for an 'electro-heater' surface heated by a platinum-wire coil powered by batteries. In his words, useful to "warm rooms, boil water, cook victuals...".
Canadian inventor Thomas Ahearn filed patent number no. 39916 in 1892 for an "Electric Oven," a device he probably employed in preparing a meal for an Ottawa hotel that year. Ahearn and Warren Y. Soper were owners of Ottawa's Chaudiere Electric Light and Power Company. The electric stove was showcased at the Chicago World's Fair in 1893, where an electrified model kitchen was shown. Unlike the gas stove, the electrical stove was slow to catch on, partly due to the unfamiliar technology, and the need for cities and towns to be electrified. By the 1930s, the technology had matured and the electrical stove slowly began to replace the gas stove, especially in household kitchens...
Early electric stoves were unsatisfactory due to the cost of electricity (compared with wood, coal, or city gas), limited power available from the electrical supply company, poor temperature regulation, and short life of heating elements. The invention of nichrome alloy for resistance wires improved the cost and durability of heating elements. In the United States, even though three companies had introduced electric stoves in 1908, penetration was rare; an electric stove was still considered a novelty in the 1920s. By the 1930s, decreased cost of electric power and modernized styling of electric stoves had greatly increased their acceptance.
Electric stoves and other household appliances were marketed by electrical utilities to build demand for electric power. During the expansion of rural electrification, demonstrations of cooking on an electric stove were popular..
2020-12-12 19:46:41 +0000 UTC
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Originally a public domain film from the National Archives or Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Embankment_dam
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
An embankment dam is a large artificial dam. It is typically created by the placement and compaction of a complex semi-plastic mound of various compositions of soil, sand, clay, or rock. It has a semi-pervious waterproof natural covering for its surface and a dense, impervious core. This makes the dam impervious to surface or seepage erosion. Such a dam is composed of fragmented independent material particles. The friction and interaction of particles binds the particles together into a stable mass rather than by the use of a cementing substance...
Embankment dams come in two types: the earth-filled dam (also called an earthen dam or terrain dam) made of compacted earth, and the rock-filled dam. A cross-section of an embankment dam shows a shape like a bank, or hill. Most have a central section or core composed of an impermeable material to stop water from seeping through the dam. The core can be of clay, concrete, or asphalt concrete. This type of dam is a good choice for sites with wide valleys. They can be built on hard rock or softer soils. For a rock-fill dam, rock-fill is blasted using explosives to break the rock. Additionally, the rock pieces may need to be crushed into smaller grades to get the right range of size for use in an embankment dam.
Safety
The building of a dam and the filling of the reservoir behind it places a new weight on the floor and sides of a valley. The stress of the water increases linearly with its depth. Water also pushes against the upstream face of the dam, a nonrigid structure that under stress behaves semiplastically, and causes greater need for adjustment (flexibility) near the base of the dam than at shallower water levels. Thus the stress level of the dam must be calculated in advance of building to ensure that its break level threshold is not exceeded.
Overtopping or overflow of an embankment dam beyond its spillway capacity will cause its eventual failure. The erosion of the dam's material by overtopping runoff will remove masses of material whose weight holds the dam in place and against the hydraulic forces acting to move the dam. Even a small sustained overtopping flow can remove thousands of tons of overburden soil from the mass of the dam within hours. The removal of this mass unbalances the forces that stabilize the dam against its reservoir as the mass of water still impounded behind the dam presses against the lightened mass of the embankment, made lighter by surface erosion. As the mass of the dam erodes, the force exerted by the reservoir begins to move the entire structure. The embankment, having almost no elastic strength, would begin to break into separate pieces, allowing the impounded reservoir water to flow between them, eroding and removing even more material as it passes through. In the final stages of failure the remaining pieces of the embankment would offer almost no resistance to the flow of the water and continue to fracture into smaller and smaller sections of earth or rock until these would disintegrate into a thick mud soup of earth, rocks and water.
Therefore, safety requirements for the spillway are high, and require it to be capable of containing a maximum flood stage. It is common for its specifications to be written such that it can contain at least a one-hundred-year flood. A number of embankment dam overtopping protection systems were developed around the turn of the third millennium. These techniques include the concrete overtopping protection systems, timber cribs, sheet-piles, riprap and gabions, reinforced earth, minimum energy loss weirs, embankment overflow stepped spillways and the precast concrete block protection systems...
2020-12-12 19:46:09 +0000 UTC
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'JK tells us that bees sleep with their eyes open, that there are 5,000 bees to a pound, and that worker bees feed an average larva 13 or 14 hundred (?!) times a day.'
Originally a public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Bee
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Bees are flying insects closely related to wasps and ants, known for their role in pollination and, in the case of the best-known bee species, the western honey bee, for producing honey. Bees are a monophyletic lineage within the superfamily Apoidea. They are presently considered a clade, called Anthophila. There are over 16,000 known species of bees in seven recognized biological families. Some species – including honey bees, bumblebees, and stingless bees – live socially in colonies while some species – including mason bees, carpenter bees, leafcutter bees, and sweat bees – are solitary.
Bees are found on every continent except for Antarctica, in every habitat on the planet that contains insect-pollinated flowering plants. The most common bees in the Northern Hemisphere are the Halictidae, or sweat bees, but they are small and often mistaken for wasps or flies. Bees range in size from tiny stingless bee species, whose workers are less than 2 millimetres (0.08 in) long, to Megachile pluto, the largest species of leafcutter bee, whose females can attain a length of 39 millimetres (1.54 in).
Bees feed on nectar and pollen, the former primarily as an energy source and the latter primarily for protein and other nutrients. Most pollen is used as food for their larvae. Vertebrate predators of bees include birds such as bee-eaters; insect predators include beewolves and dragonflies.
Bee pollination is important both ecologically and commercially, and the decline in wild bees has increased the value of pollination by commercially managed hives of honey bees. The analysis of 353 wild bee and hoverfly species across Britain from 1980 to 2013 found the insects have been lost from a quarter of the places they inhabited in 1980.
Human beekeeping or apiculture has been practised for millennia, since at least the times of Ancient Egypt and Ancient Greece. Bees have appeared in mythology and folklore, through all phases of art and literature from ancient times to the present day, although primarily focused in the Northern Hemisphere where beekeeping is far more common...
https://en.wikipedia.org/wiki/Beehive
A beehive is an enclosed structure in which some honey bee species of the subgenus Apis live and raise their young. Though the word beehive is commonly used to describe the nest of any bee colony, scientific and professional literature distinguishes nest from hive. Nest is used to discuss colonies which house themselves in natural or artificial cavities or are hanging and exposed. Hive is used to describe an artificial/man-made structure to house a honey bee nest. Several species of Apis live in colonies, but for honey production the western honey bee (Apis mellifera) and the eastern honey bee (Apis cerana) are the main species kept in hives.
The nest's internal structure is a densely packed group of hexagonal prismatic cells made of beeswax, called a honeycomb. The bees use the cells to store food (honey and pollen) and to house the brood (eggs, larvae, and pupae).
Beehives serve several purposes: production of honey, pollination of nearby crops, housing supply bees for apitherapy treatment, and to try to mitigate the effects of colony collapse disorder. In America, hives are commonly transported so that bees can pollinate crops in other areas. A number of patents have been issued for beehive designs...
2020-12-11 22:20:59 +0000 UTC
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'JK tells us that bees sleep with their eyes open, that there are 5,000 bees to a pound, and that worker bees feed an average larva 13 or 14 hundred (?!) times a day.'
Originally a public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Bee
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Bees are flying insects closely related to wasps and ants, known for their role in pollination and, in the case of the best-known bee species, the western honey bee, for producing honey. Bees are a monophyletic lineage within the superfamily Apoidea. They are presently considered a clade, called Anthophila. There are over 16,000 known species of bees in seven recognized biological families. Some species – including honey bees, bumblebees, and stingless bees – live socially in colonies while some species – including mason bees, carpenter bees, leafcutter bees, and sweat bees – are solitary.
Bees are found on every continent except for Antarctica, in every habitat on the planet that contains insect-pollinated flowering plants. The most common bees in the Northern Hemisphere are the Halictidae, or sweat bees, but they are small and often mistaken for wasps or flies. Bees range in size from tiny stingless bee species, whose workers are less than 2 millimetres (0.08 in) long, to Megachile pluto, the largest species of leafcutter bee, whose females can attain a length of 39 millimetres (1.54 in).
Bees feed on nectar and pollen, the former primarily as an energy source and the latter primarily for protein and other nutrients. Most pollen is used as food for their larvae. Vertebrate predators of bees include birds such as bee-eaters; insect predators include beewolves and dragonflies.
Bee pollination is important both ecologically and commercially, and the decline in wild bees has increased the value of pollination by commercially managed hives of honey bees. The analysis of 353 wild bee and hoverfly species across Britain from 1980 to 2013 found the insects have been lost from a quarter of the places they inhabited in 1980.
Human beekeeping or apiculture has been practised for millennia, since at least the times of Ancient Egypt and Ancient Greece. Bees have appeared in mythology and folklore, through all phases of art and literature from ancient times to the present day, although primarily focused in the Northern Hemisphere where beekeeping is far more common...
https://en.wikipedia.org/wiki/Beehive
A beehive is an enclosed structure in which some honey bee species of the subgenus Apis live and raise their young. Though the word beehive is commonly used to describe the nest of any bee colony, scientific and professional literature distinguishes nest from hive. Nest is used to discuss colonies which house themselves in natural or artificial cavities or are hanging and exposed. Hive is used to describe an artificial/man-made structure to house a honey bee nest. Several species of Apis live in colonies, but for honey production the western honey bee (Apis mellifera) and the eastern honey bee (Apis cerana) are the main species kept in hives.
The nest's internal structure is a densely packed group of hexagonal prismatic cells made of beeswax, called a honeycomb. The bees use the cells to store food (honey and pollen) and to house the brood (eggs, larvae, and pupae).
Beehives serve several purposes: production of honey, pollination of nearby crops, housing supply bees for apitherapy treatment, and to try to mitigate the effects of colony collapse disorder. In America, hives are commonly transported so that bees can pollinate crops in other areas. A number of patents have been issued for beehive designs...
2020-12-11 22:20:16 +0000 UTC
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COMBAT FOOTAGE CENTERED PRIMARILY AROUND OPERATION PIRANHA, CARRIED OUT AGAINST THE VIET CONG STRONGHOLD. PLANNING AND EXECUTION OF THE OPERATION. MARINES EXERCISING "ACROSS THE BEACH" LANDING TECHNIQUES. MARINES CLOSE AIR SUPPORT, NAVAL GUN FIRE SUPPORT AND ARTILLERY. EMPLOYMENT OF HELICOPTERS ILLUSTRATES VERTICAL ASSAULT TECHNIQUES. CAPTURE OF VIET CONG PRISONERS, PATROL ACTION AND TREATMENT OF WOUNDED MARINES.
Originally a public domain film from the National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Operation_Piranha
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Operation Piranha was a US Marine Corps operation that took place on the Batangan Peninsula southeast of Chu Lai, lasting from 7 to 10 September 1965...
Prelude
Following the conclusion of Operation Starlite, on 24 August 1965, Marine intelligence concluded that the 1st VC Regiment had withdrawn into the Batangan Peninsula. Reconnaissance photos of the Peninsula showed a V of older field fortifications pointing inland with the open end to the sea and a new second V further inland under construction.
The plan of operations was for a Battalion Landing Team (BLT) of the 1st Battalion, 7th Marines to land across White Beach north of the Peninsula and push south, while 3rd Battalion, 7th Marines, would be helilifted in by MAG-16 to set up blocking positions 4 km inland. 3rd Battalion, 3rd Marines would remain available as a floating reserve. The Army of the Republic of Vietnam (ARVN) 2nd Battalion, 4th Regiment and the 3rd Vietnamese Marine Battalion would be helilifted into the south of 3/7 Marines to clear and search the An Ky Peninsula.
Operation
The operation was launched on 7 September 1965, the amphibious landing was unopposed, while the landing of the ARVN force received some minor ground fire.
On 8 September, Company B 1/7 Marines discovered a VC field hospital in a large cave near the center of the Peninsula. The Marines captured four prisoners, but then came under fire from other VC in the cave. The Marines returned the fire and attempted to convince the VC to surrender. Marine engineers then placed explosives in the cave. After the detonation, the Marines counted 66 VC dead inside.
Aftermath
Operation Piranha concluded on 10 September, the US claimed that 178 VC had been killed and 360 VC and suspected VC had been captured. Allied losses were two Marines and five South Vietnamese killed.
The operation failed to wipe out the 1st VC Regiment, villagers told the Marines that Vietcong units had been in the area but had left, some less than 24 hours before Operation Piranha had commenced. Intelligence reports later indicated that the 1st VC Regiment began leaving the peninsula on 4 September, coinciding with the increased movement of the amphibious ships at Chu Lai Base Area...
2020-12-10 22:15:33 +0000 UTC
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'Discusses the major forms of gambling including card and dice games, roulette, slot machines, lotteries and horse racing. Explains the odds against the player in an honest game and shows how these odds can be increased by cheating.'
Originally a public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Gambling_in_the_United_States
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Gambling in the United States is legally restricted. In 2008, gambling activities generated gross revenues (the difference between the total amounts wagered minus the funds or "winnings" returned to the players) of $92.27 billion in the United States.
The American Gaming Association, an industry trade group, states that gaming in the U.S. is a $240 billion industry, employing 1.7 million people in 40 states. In 2016, gaming taxes contributed $8.85 billion in state and local tax revenues.
Critics of gambling argue it leads to increased political corruption, compulsive gambling, and higher crime rates. Others argue that gambling is a type of regressive tax on the individuals in local economies where gambling venues are located...
Many levels of government have authorized multiple forms of gambling in an effort to raise money for needed services without raising direct taxes. These include everything from bingo games in church basements, to multimillion-dollar poker tournaments. Sometimes states advertise revenues from certain games to be devoted to particular needs, such as education.
When New Hampshire authorized a state lottery in 1963, it represented a major shift in social policy. No state governments had previously directly run gambling operations to raise money. Other states followed suit, and now the majority of the states run some type of lottery to raise funds for state operations. Some states restrict this revenue to specific forms of expenditures, usually oriented toward education, while others allow lottery revenues to be spent on general government. This has brought about morally questionable issues, such as states' using marketing firms to increase their market share, or to develop new programs when old forms of gambling do not raise as much money...
If state-run lotteries are included, then 48 states allow some form of gambling (the exceptions are Hawaii, where gambling was outlawed prior to statehood, and Utah, which has a Mormon majority population and also bans gambling in the State Constitution).
However, casino-style gambling is much less widespread. Federal law provides leeway for Native American Trust Land to be used for games of chance if an agreement is put in place between the State and the Tribal Government (e.g. A 'Compact' or 'Agreement') under the Indian Gaming Regulatory Act of 1988.
As of 2020, Nevada and Louisiana are the only two states in which casino-style gambling is legal statewide, with both state and local governments imposing licensing and zoning restrictions. All other states that allow casino-style gambling restrict it to small geographic areas (e.g., Atlantic City, New Jersey or Tunica, Mississippi), or to American Indian reservations, some of which are located in or near large cities.
As domestic dependent nations, American Indian tribes have used legal protection to open casinos, which has been a contentious political issue in California and other states. In some states, casinos are restricted to "riverboats", large multi-story barges that are permanently moored in a body of water.
Online gambling has been more strictly regulated: the Federal Wire Act of 1961 outlawed interstate wagering on sports, but did not address other forms of gambling; it has been the subject of court cases. The Unlawful Internet Gambling Enforcement Act of 2006 (UIGEA) did not specifically prohibit online gambling; instead, it outlawed financial transactions involving online gambling service providers - some offshore gambling providers reacted by shutting down their services for US customers...
2020-12-10 22:15:02 +0000 UTC
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SKI SAFETY PRECAUTIONS IN CONNECTION WITH EXCESSIVE SPEED AND FAULTY ADJUSTMENTS--REMEDIES FOR OVER-HEATING, SUNBURN AND SNOWBLINDNESS.
Originally a public domain film from the National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Nordic_skiing
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Nordic skiing encompasses the various types of skiing in which the toe of the ski boot is fixed to the binding in a manner that allows the heel to rise off the ski, unlike Alpine skiing, where the boot is attached to the ski from toe to heel. Recreational disciplines include cross-country skiing and Telemark skiing.
Olympic events are competitive cross-country skiing, ski jumping, biathlon and Nordic combined—competition in which athletes both cross-country ski and ski jump. The FIS Nordic World Ski Championships host these sports, plus Telemark skiing, at the championship level in the winter of every odd-numbered year. Biathlon combines cross-country skiing and rifle shooting, but is not included as a Nordic discipline under the rules of the International Ski Federation (FIS). Instead, it comes under the jurisdiction of the International Biathlon Union.
The biomechanics of competitive cross-country skiing and ski jumping have been the subject of serious study. Cross-country skiing requires strength and endurance and ski jumping requires aerodynamic efficiency, both of which requirements translate into specific skills to be optimized in training and competition...
Origins
Recreational skiing began with organized skiing exercises and races of the Norwegian and Swedish infantries. Military races and exercises included downhill in rough terrain, target practice while skiing downhill, and 3 km cross-country skiing with full military backpack. Slalom (Norwegian: slalåm) is a word of Norwegian origin that has entered the international skiing vocabulary. In the 1800s skiers in Telemark challenged each other on "wild slopes" (ville låmir), more gentle slopes had the adjective "sla". Some races were on "bumpy courses" (kneikelåm) and sometimes included "steep jumps" (sprøytehopp) for difficulty. These 19th century races in Telemark ran along particularly difficult trails usually from a steep mountain, along timber-slides and ended with a sharp turn ("Telemark turn") on a field or icy lake...
2020-12-09 23:42:57 +0000 UTC
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Silent, with title cards.
Originally a public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
https://en.wikipedia.org/wiki/Silent_film
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
A silent film is a film with no synchronized recorded sound (and in particular, no audible dialogue). In silent films for entertainment, the plot may be conveyed by the use of title cards, written indications of the plot and key dialogue lines. The idea of combining motion pictures with recorded sound is nearly as old as film itself, but because of the technical challenges involved, the introduction of synchronized dialogue became practical only in the late 1920s with the perfection of the Audion amplifier tube and the advent of the Vitaphone system.
The term "silent film" is something of a misnomer, as these films were almost always accompanied by live sounds. During the silent era that existed from the mid-1890s to the late 1920s, a pianist, theater organist—or even, in large cities, a small orchestra—would often play music to accompany the films. Pianists and organists would play either from sheet music, or improvisation. Sometimes a person would even narrate the intertitle cards for the audience. Though at the time the technology to synchronize sound with the video did not exist, music was seen as an essential part of the viewing experience. The term is also frequently used to describe sound-era films that have a recorded music-only soundtrack without dialogue, such as City Lights and The Artist.
The term silent film is a retronym—a term created to retroactively distinguish something. Early sound films, starting with The Jazz Singer in 1927, were variously referred to as the "talkies", "sound films", or "talking pictures". Within a decade, the widespread production of silent films for popular entertainment had ceased, and the industry had moved fully into the sound era, in which movies were accompanied by synchronized sound recordings of spoken dialogue, music and sound effects.
Most early motion pictures are considered lost because the nitrate film used in that era was extremely unstable and flammable. Additionally, many films were deliberately destroyed because they had negligible continuing financial value in this era. It has often been claimed that around 75 percent of silent films produced in the US have been lost, though these estimates may be inaccurate due to a lack of numerical data...
The work of Muybridge, Marey, and Le Prince laid the foundation for future development of motion picture cameras, projectors and transparent celluloid film, which lead to the development of cinema as we know it today. American inventor George Eastman, who had first manufactured photographic dry plates in 1878, made headway on a stable type of celluloid film in 1888.
The art of motion pictures grew into full maturity in the "silent era" (1894 in film – 1929 in film). The height of the silent era (from the early 1910s in film to the late 1920s) was a particularly fruitful period, full of artistic innovation. The film movements of Classical Hollywood as well as French Impressionism, German Expressionism, and Soviet Montage began in this period. Silent filmmakers pioneered the art form to the extent that virtually every style and genre of film-making of the 20th and 21st centuries has its artistic roots in the silent era. The silent era was also a pioneering one from a technical point of view. Three-point lighting, the close-up, long shot, panning, and continuity editing all became prevalent long before silent films were replaced by "talking pictures" or "talkies" in the late 1920s. Some scholars claim that the artistic quality of cinema decreased for several years, during the early 1930s, until film directors, actors, and production staff adapted fully to the new "talkies" around the mid 1930s.
The visual quality of silent movies—especially those produced in the 1920s—was often high, but there remains a widely held misconception that these films were primitive, or are barely watchable by modern standards. This misconception comes from the general public's unfamiliarity with the medium, as well as from carelessness on the part of the industry. Most silent films are poorly preserved, leading to their deterioration...
2020-12-09 23:42:21 +0000 UTC
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Originally a public domain film from the US Air Force, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Boeing_B-52_Stratofortress
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
The Boeing B-52 Stratofortress is an American long-range, subsonic, jet-powered strategic bomber. The B-52 was designed and built by Boeing, which has continued to provide support and upgrades. It has been operated by the United States Air Force (USAF) since the 1950s. The bomber is capable of carrying up to 70,000 pounds (32,000 kg) of weapons, and has a typical combat range of more than 8,800 miles (14,080 km) without aerial refueling.
Beginning with the successful contract bid in June 1946, the B-52 design evolved from a straight wing aircraft powered by six turboprop engines to the final prototype YB-52 with eight turbojet engines and swept wings. The B-52 took its maiden flight in April 1952. Built to carry nuclear weapons for Cold War-era deterrence missions, the B-52 Stratofortress replaced the Convair B-36 Peacemaker. A veteran of several wars, the B-52 has dropped only conventional munitions in combat. The B-52's official name Stratofortress is rarely used; informally, the aircraft has become commonly referred to as the BUFF (Big Ugly Fat Fucker/Fella).
The B-52 has been in service with the USAF since 1955. As of June 2019, 58 are in service, 18 in reserve, and about 12 in long-term storage. The bombers flew under the Strategic Air Command (SAC) until it was disestablished in 1992 and its aircraft absorbed into the Air Combat Command (ACC); in 2010, all B-52 Stratofortresses were transferred from the ACC to the new Air Force Global Strike Command (AFGSC). Superior performance at high subsonic speeds and relatively low operating costs have kept them in service despite the advent of later, more advanced strategic bombers, including the Mach 2+ B-58 Hustler, the canceled Mach 3 B-70 Valkyrie, the variable-geometry B-1 Lancer, and the stealth B-2 Spirit. The B-52 completed sixty years of continuous service with its original operator in 2015. After being upgraded between 2013 and 2015, the last airplanes are expected to serve into the 2050s...
The B-52 shared many technological similarities with the preceding B-47 Stratojet strategic bomber. The two aircraft used the same basic design, such as swept wings and podded jet engines, and the cabin included the crew ejection systems. On the B-52D, the pilots and electronic countermeasures (ECM) operator ejected upwards, while the lower deck crew ejected downwards; until the B-52G, the gunner had to jettison the tail gun to bail out. The tail gunner in early model B-52s was located in the traditional location in the tail of the plane, with both visual and radar gun laying systems; in later models the gunner was moved to the front of the fuselage, with gun laying carried out by radar alone, much like the B-58 Hustler's tail gun system.
Structural fatigue was accelerated by at least a factor of eight in a low-altitude flight profile over that of high-altitude flying, requiring costly repairs to extend service life. In the early 1960s, the three-phase High Stress program was launched to counter structural fatigue, enrolling aircraft at 2,000 flying hours. Follow-up programs were conducted, such as a 2,000-hour service life extension to select airframes in 1966–1968, and the extensive Pacer Plank reskinning, completed in 1977. The wet wing introduced on G and H models was even more susceptible to fatigue, experiencing 60% more stress during flight than the old wing. The wings were modified by 1964 under ECP 1050.[90] This was followed by a fuselage skin and longeron replacement (ECP 1185) in 1966, and the B-52 Stability Augmentation and Flight Control program (ECP 1195) in 1967.[90] Fuel leaks due to deteriorating Marman clamps continued to plague all variants of the B-52. To this end, the aircraft were subjected to Blue Band (1957), Hard Shell (1958), and finally QuickClip (1958) programs. The latter fitted safety straps that prevented catastrophic loss of fuel in case of clamp failure. The B-52's service ceiling is officially listed as 50,000 feet, but operational experience shows this is difficult to reach when fully laden with bombs. According to one source: "The optimal altitude for a combat mission was around 43,000 feet, because to exceed that height would rapidly degrade the plane's range."...
2020-12-09 23:41:29 +0000 UTC
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Produced for the US Navy by Reid H. Ray Productions.
Originally a public domain film from the US Navy, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Anti-submarine_warfare
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Anti-submarine warfare (ASW, or in older form A/S) is a branch of underwater warfare that uses surface warships, aircraft, or other submarines to find, track, and deter, damage, or destroy enemy submarines.
Successful anti-submarine warfare depends on a mix of sensor and weapon technology, training, and experience. Sophisticated sonar equipment for first detecting, then classifying, locating, and tracking the target submarine is a key element of ASW. To destroy submarines, both torpedoes and naval mines are used, launched from air, surface, and underwater platforms. ASW also involves protecting friendly ships...
The military submarine is still a threat, so ASW remains a key to obtaining sea control. Neutralizing the SSBN has been a key driver and this still remains. However, non-nuclear-powered submarines have become increasingly important. Though the diesel-electric submarine continues to dominate in numbers, several alternative technologies now exist to enhance the endurance of small submarines. Previously the emphasis had been largely on deep water operation but this has now switched to littoral operation where ASW is generally more difficult.
Anti-submarine warfare technologies
There are a large number of technologies used in modern anti-submarine warfare:
Sensors
Acoustics particularly in active and passive sonar, sonobuoys, and fixed hydrophones aid in the detection of radiated noise. Sonar can be mounted on the hull or in a towed array.
Pyrotechnics in the use of markers, flares and explosive devices
Searchlights
Radar, for surfaced parts
Hydrodynamic pressure wave (wake) detection
Laser detection and ranging of surfaced vessels; airborne and satellite
Electronic countermeasures and acoustic countermeasures such as noise and bubble makers
Passive acoustic countermeasures such as concealment and design of sound-absorbing materials to coat reflecting underwater surfaces
Magnetic anomaly detection (MAD)
Active and (more commonly) passive infra-red detection of surfaced parts.
In modern times forward looking infrared (FLIR) detectors have been used to track the large plumes of heat that fast nuclear-powered submarines leave while rising to the surface. FLIR devices are also used to see periscopes or snorkels at night whenever a submariner might be incautious enough to probe the surface.
The active sonar used in such operations is often of "mid-frequency", approximately 3.5 kHz. Because of the quietening of submarines, resulting in shorter passive detection ranges, there has been interest in low frequency active for ocean surveillance. However, there have been protests about the use of medium and low frequency high-powered active sonar because of its effects on whales. Others argue the high power level of some LFA (Low Frequency Active) sonars is actually detrimental to sonar performance in that such sonars are reverberation limited...
2020-12-08 21:09:33 +0000 UTC
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'The National Archives has this listed as A Captured Film, Hawaii but this is the Japanese (English-language) propaganda film Greater East Asia News #1 - Air Attacks Over Hawaii. (Also known as Daitoa News No. 1) It was released as Army Air Forces Combat Subject film #739. More information is at the Imperial War Museum. National Archives Identifier 3469.'
Originally a public domain film from the National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Attack_on_Pearl_Harbor
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
The attack on Pearl Harbor was a surprise preemptive military strike by the Imperial Japanese Navy Air Service upon the United States (a neutral country at the time) against the naval base at Pearl Harbor in Honolulu, Hawaii on Sunday morning, December 7, 1941. The attack led to the United States' formal entry into World War II the next day. The Japanese military leadership referred to the attack as the Hawaii Operation and Operation AI, and as Operation Z during its planning.
Japan intended the attack as a preventive action to keep the United States Pacific Fleet from interfering with its planned military actions in Southeast Asia against overseas territories of the United Kingdom, the Netherlands, and the United States. Over the course of seven hours there were coordinated Japanese attacks on the U.S.-held Philippines, Guam and Wake Island and on the British Empire in Malaya, Singapore, and Hong Kong.
The attack commenced at 7:48 a.m. Hawaiian Time (18:18 GMT). The base was attacked by 353 Imperial Japanese aircraft (including fighters, level and dive bombers, and torpedo bombers) in two waves, launched from six aircraft carriers. All eight U.S. Navy battleships were damaged, with four sunk. All but USS Arizona were later raised, and six were returned to service and went on to fight in the war. The Japanese also sank or damaged three cruisers, three destroyers, an anti-aircraft training ship, and one minelayer. 188 U.S. aircraft were destroyed; 2,403 Americans were killed and 1,178 others were wounded. Important base installations such as the power station, dry dock, shipyard, maintenance, and fuel and torpedo storage facilities, as well as the submarine piers and headquarters building (also home of the intelligence section) were not attacked. Japanese losses were light: 29 aircraft and five midget submarines lost, and 64 servicemen killed. One Japanese sailor, Kazuo Sakamaki, was captured.
Japan announced a declaration of war on the United States later that day (December 8 in Tokyo), but the declaration was not delivered until the following day. The following day, December 8, Congress declared war on Japan. On December 11, Germany and Italy each declared war on the U.S., which responded with a declaration of war against Germany and Italy.
There were numerous historical precedents for the unannounced military action by Japan, but the lack of any formal warning, particularly while peace negotiations were still apparently ongoing, led President Franklin D. Roosevelt to proclaim December 7, 1941, "a date which will live in infamy". Because the attack happened without a declaration of war and without explicit warning, the attack on Pearl Harbor was later judged in the Tokyo Trials to be a war crime...
2020-12-08 21:08:57 +0000 UTC
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'Silent Castle film of the bombing of Pearl Harbor and the burning of the SS Normandie.'
Originally a public domain film from the Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
https://en.wikipedia.org/wiki/Attack_on_Pearl_Harbor
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
The attack on Pearl Harbor was a surprise preemptive military strike by the Imperial Japanese Navy Air Service upon the United States (a neutral country at the time) against the naval base at Pearl Harbor in Honolulu, Hawaii on Sunday morning, December 7, 1941. The attack led to the United States' formal entry into World War II the next day. The Japanese military leadership referred to the attack as the Hawaii Operation and Operation AI, and as Operation Z during its planning.
Japan intended the attack as a preventive action to keep the United States Pacific Fleet from interfering with its planned military actions in Southeast Asia against overseas territories of the United Kingdom, the Netherlands, and the United States. Over the course of seven hours there were coordinated Japanese attacks on the U.S.-held Philippines, Guam and Wake Island and on the British Empire in Malaya, Singapore, and Hong Kong.
The attack commenced at 7:48 a.m. Hawaiian Time (18:18 GMT). The base was attacked by 353 Imperial Japanese aircraft (including fighters, level and dive bombers, and torpedo bombers) in two waves, launched from six aircraft carriers. All eight U.S. Navy battleships were damaged, with four sunk. All but USS Arizona were later raised, and six were returned to service and went on to fight in the war. The Japanese also sank or damaged three cruisers, three destroyers, an anti-aircraft training ship, and one minelayer. 188 U.S. aircraft were destroyed; 2,403 Americans were killed and 1,178 others were wounded. Important base installations such as the power station, dry dock, shipyard, maintenance, and fuel and torpedo storage facilities, as well as the submarine piers and headquarters building (also home of the intelligence section) were not attacked. Japanese losses were light: 29 aircraft and five midget submarines lost, and 64 servicemen killed. One Japanese sailor, Kazuo Sakamaki, was captured.
Japan announced a declaration of war on the United States later that day (December 8 in Tokyo), but the declaration was not delivered until the following day. The following day, December 8, Congress declared war on Japan. On December 11, Germany and Italy each declared war on the U.S., which responded with a declaration of war against Germany and Italy.
There were numerous historical precedents for the unannounced military action by Japan, but the lack of any formal warning, particularly while peace negotiations were still apparently ongoing, led President Franklin D. Roosevelt to proclaim December 7, 1941, "a date which will live in infamy". Because the attack happened without a declaration of war and without explicit warning, the attack on Pearl Harbor was later judged in the Tokyo Trials to be a war crime...
2020-12-08 21:08:24 +0000 UTC
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'Sensationalist "documentary" on the Agua area of Guatemala, where people live in the shadow of a volcano.'
Originally a public domain film from the National Archives or Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Volcán_de_Agua
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Volcán de Agua (also known as Hunahpú by Maya) is a stratovolcano located in the departments of Sacatepéquez and Escuintla in Guatemala. At 3,760 m (12,340 ft), Agua Volcano towers more than 3,500 m (11,500 ft) above the Pacific coastal plain to the south and 2,000 m (6,600 ft) above the Guatemalan Highlands to the north. It dominates the local landscape except when hidden by cloud cover. The volcano is within 5 to 10 km (3.1 to 6.2 mi) of the city of Antigua Guatemala and several other large towns situated on its northern apron. These towns have a combined population of nearly 100,000. It is within about 20 km of Escuintla (population, ca. 150,000) to the south. Coffee is grown on the volcano's lower slopes...
The local Kaqchikel people have always called the volcano Hunapú "place of flowers" or Jun Ajpu' "one hunter" (The calendar date for the sacred site; a typical method for naming sacred sites in Mayan cosmovision) in current Kaqchikel orthography. The Spanish conquistadors also called it Hunapú until a lahar from the volcano on September 10, 1541 destroyed the original capital of Guatemala (now known as Ciudad Vieja) and the city was moved to the current site of Antigua Guatemala following this disaster. Among the casualties was the governor Beatriz de la Cueva. As the lahar produced a destructive flood of water, this prompted the modern name "Volcán de Agua" meaning "Volcano of Water", in contrast to the nearby "Volcán de Fuego" or "Volcano of Fire". The Kaqchikels call Volcan de Fuego Chi Gag, which translates to "where the fire is" or Chi Q'aq' in current Kaqchikel orthography.
The volcano was active in the late Pleistocene between 80,000 and 10,000 years ago, but has not erupted since then. Despite the lack of eruptive activity, the volcano can still produce debris flows and lahars that inundate nearby populated areas. This was proven by the fact that on 11 September 1541, newly founded villa of Santiago de los Caballeros was ruined by a "formidable landslide that came down Volcán de Agua; the mudslide brought along heavy rocks that destroyed part of the buildings and damaged the rest". The city was destroyed and the survivors had no direction, since governor Beatriz de la Cueva died during the disaster, which took place shortly after her husband, Adelantado Pedro de Alvarado, died and she was appointed governor by the Ayuntamiento (English:City Hall). Beatriz de la Cueva had been beside herself with grief and on 9 September 1541, when she had signed the Cabildo documents, she did so as "la sin ventura" (English: the hapless one), a phrase that turned out to be prophetic. In the aftermath Beatriz de la Cueva was blamed for the disaster as it was considered to be a godly punishment for her sins. Additionally her fate became a cautionary tale about giving women positions in government particularly when many qualified men were available...
2020-12-07 22:08:51 +0000 UTC
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With title cards. 'Silent film that looks at the educational path for a child who will eventually become an industrial worker.'
Originally a public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
https://en.wikipedia.org/wiki/DeVry_University
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
DeVry University is a for-profit college based in the United States. The school was founded in 1931 by Herman A. DeVry, as DeForest Training School and officially became DeVry University in 2002. As of September 16, 2019, DeVry reported an undergraduate enrollment of 14,163 and a graduate school enrollment of 4,032, for a total of 18,195 students.
DeVry University has been involved in numerous investigations, lawsuits, and settlements, mostly regarding their inflated claims about the employment rates and salaries of its graduates, as well as regarding education quality and loan practices. It was one of the universities highlighted in the 2018 documentary Fail State. Murray Hastie, an Iraq War veteran with post-traumatic stress disorder, told his story about how he ended up with $50,000 in student loan debt after his experience at DeVry.
In 2014, accumulated student loan debt from DeVry University and Keller, its graduate school, was about $12.1 billion. For the 2018-19 academic year, the amount that all undergraduate students received in federal student loans was $69.42 million...
History
Early history (1931–1970)
DeVry was founded in 1931 as the De Forest Training School in Chicago, Illinois. School founder Herman A. DeVry, who had previously invented a motion picture projector and produced educational and training films, named the school after his friend Lee de Forest. De Forest Training School originally taught projector and radio repair, but later expanded to include other electronic equipment such as televisions. after its founder's death in March 1941, The school was renamed DeVry Technical Institute in 1953 and gained accreditation to confer associate degrees in electronics in 1957.
Bell & Howell completed its acquisition of DeVry Technical Institute in 1967. A year later, the company acquired the Ohio Institute of Technology and DeVry was renamed DeVry Institute of Technology, which was accredited to confer bachelor's degrees in electronics in 1969...
2020-12-07 22:07:56 +0000 UTC
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Originally a public domain film from the Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Traffic_collision
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
A traffic collision, also called a motor vehicle collision (MVC) among other terms, occurs when a vehicle collides with another vehicle, pedestrian, animal, road debris, or other stationary obstruction, such as a tree, pole or building. Traffic collisions often result in injury, death, and property damage.
A number of factors contribute to the risk of collision, including vehicle design, speed of operation, road design, road environment, and driver skill, impairment due to alcohol or drugs, and behavior, notably distracted driving, speeding and street racing. Worldwide, motor vehicle collisions lead to death and disability as well as financial costs to both society and the individuals involved.
In 2013, 54 million people worldwide sustained injuries from traffic collisions. This resulted in 1.4 million deaths in 2013, up from 1.1 million deaths in 1990. About 68,000 of these occurred in children less than five years old. Almost all high-income countries have decreasing death rates, while the majority of low-income countries have increasing death rates due to traffic collisions. Middle-income countries have the highest rate with 20 deaths per 100,000 inhabitants, accounting for 80% of all road fatalities with 52% of all vehicles. While the death rate in Africa is the highest (24.1 per 100,000 inhabitants), the lowest rate is to be found in Europe (10.3 per 100,000 inhabitants)..,
2020-12-07 22:07:21 +0000 UTC
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Originally a public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Pilot_error
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Historically, the term pilot error has been used to describe an accident in which an action or decision made by the pilot was the cause or a contributing factor that led to the accident, but also includes the pilot's failure to make a correct decision or take proper action.[2] Errors are intentional actions that fail to achieve their intended outcomes. Chicago Convention defines accident as "An occurrence associated with the operation of an aircraft [...] in which [...] a person is fatally or seriously injured [...] except when the injuries are [...] inflicted by other persons." Hence the definition of the "pilot error" does not include deliberate crash (and such crash is not an accident).
The causes of pilot error include psychological and physiological human limitations. Various forms of threat and error management have been implemented into pilot training programs to teach crew members how to deal with impending situations that arise throughout the course of a flight.
Accounting for the way human factors influence the actions of pilots is now considered standard practice by accident investigators when examining the chain of events that led to an accident...
Modern accident investigators avoid the words "pilot error", as the scope of their work is to determine the cause of an accident, rather than to apportion blame. Furthermore, any attempt to incriminate the pilots does not consider that they are part of a broader system, which in turn may be accountable for their fatigue, work pressure, or lack of training. The International Civil Aviation Organization (ICAO), and its member states, therefore adopted James Reason's model of causation in 1993 in an effort to better understand the role of human factors in aviation accidents.
Pilot error is nevertheless a major cause of air accidents. In 2004, it was identified as the primary reason for 78.6% of disastrous general aviation (GA) accidents, and as the major cause of 75.5% of GA accidents in the United States. There are multiple factors that can cause pilot error; mistakes in the decision-making process can be due to habitual tendencies, biases, as well as a breakdown in the processing of the information coming in. For aircraft pilots, in extreme circumstances these errors are highly likely to result in fatalities.
Causes of pilot error
Pilots work in complex environments and are routinely exposed to high amounts of situational stress in the workplace, inducing pilot error which may result in a threat to flight safety. While aircraft accidents are infrequent, they are highly visible and often involve significant numbers of fatalities. For this reason, research on causal factors and methodologies of mitigating risk associated with pilot error is exhaustive. Pilot error results from physiological and psychological limitations inherent in humans. "Causes of error include fatigue, workload, and fear as well as cognitive overload, poor interpersonal communications, imperfect information processing, and flawed decision making." Throughout the course of every flight, crews are intrinsically subjected to a variety of external threats and commit a range of errors that have the potential to negatively impact the safety of the aircraft...
2020-12-06 19:20:51 +0000 UTC
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Silent, with title cards. 'The film opens with some interesting pictures of cleaning elephants sweeping, bathing and oiling. Then a baby ourang-outang is shown amusing itself in a bucket. The bears are given a bath, and the cassowary gives an exhibition in hard kicking. In this, however, he is easily surpassed by the kangaroo, who follows.'
Originally a public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
https://en.wikipedia.org/wiki/Bronx_Zoo
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
The Bronx Zoo is a zoo located within Bronx Park in the Bronx, New York. It is one of the largest zoos in the United States by area, comprising 265 acres (107 ha) of park lands and naturalistic habitats separated by the Bronx River. On average, the zoo has 2.15 million visitors each year as of 2009.
The Bronx Zoo is world-renowned for its large and diverse animal collection, and its award-winning exhibitions. The zoo is part of an integrated system of four zoos and one aquarium managed by the Wildlife Conservation Society (WCS), and it is accredited by the Association of Zoos and Aquariums (AZA)...
In 1895, a group made up largely of members of the Boone and Crockett Club founded the New York Zoological Society (later renamed the Wildlife Conservation Society) for the purposes of founding a zoo, promoting the study of zoology, and preserving wildlife. Credit for this belonged chiefly to Club members Madison Grant and C. Grant LaFarge.
The zoo (sometimes called the Bronx Zoological Park and the Bronx Zoological Gardens) opened its doors to the public on November 8, 1899, featuring 843 animals in 22 exhibits. The first zoo director was William Temple Hornaday, who had 30 years of service at the zoo.
Heins & LaFarge designed the original permanent buildings as a series of Beaux-Arts pavilions grouped around the large circular sea lion pool. In 1934, the Rainey Memorial Gates, designed by noted sculptor Paul Manship, were dedicated as a memorial to noted big game hunter Paul James Rainey. The gates were listed on the National Register of Historic Places in 1972.
The Rockefeller Fountain, that today adorns the gardens just inside the Fordham Road Gate, was once a famous landmark in Como, Italy. Originally built by Biagio Catella in 1872, it stood in the main square (Piazza Cavour) by the lakeside. It was bought by William Rockefeller in 1902 for 3,500 lire (the estimated equivalent then of $637, and today of around $17,600) and installed at the Bronx Zoo in 1903. In 1968, the fountain was designated an official New York City landmark, and is one of the few local monuments to be honored in this way.
The New York Zoological Society's seal was designed by famed wildlife-artist Charles R. Knight. The seal depicted a ram's head and an eagle to reflect the society's interest in preserving North American wildlife. While no longer in use, the seal can still be found on the lawn in the center of Astor Court...
2020-12-06 19:20:08 +0000 UTC
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Originally a public domain film from the National Archives or Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Bell_H-13_Sioux
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
The Bell H-13 Sioux is a single-engine single-rotor light helicopter built by Bell Helicopter. Westland Aircraft manufactured the Sioux under license for the British military as the Sioux AH.1 and HT.2.
In 1947, the United States Army Air Forces (later the United States Air Force) ordered the improved Bell Model 47A. Most were designated YR-13 and three winterized versions were designated YR-13A. The United States Army first ordered Bell 47s in 1948 under the designation H-13. These would later receive the name Sioux.
Initially, the United States Navy procured several Bell 47s, designated HTL-1, between 1947 and 1958. The United States Coast Guard evaluated this model, and procured two HTL-1s for multi-mission support in the New York Harbor. The most common U.S. Navy version of the 47 was designated the HTL-4, and dispenses with the fabric covering on the tail boom. The U.S. Coast Guard procured three HTL-5s in 1952 (similar to the HTL-4 but powered by a Franklin O-335-5 engine) and used these until 1960. The Coast Guard procured two of Bell's Model 47G and designated them HUL-1G in 1959.
The H-13 was used as an observation helicopter early in the Vietnam War, before being replaced by the Hughes OH-6 Cayuse in 1966.
The Bell 47 was ordered by the British Army as the Sioux to meet specification H.240, with licensed production by Westland Helicopters. In order to comply with the terms of its licence agreement with Sikorsky Aircraft, which prevented it building a U.S. competitor's aircraft, Westland licensed the Model 47 from Agusta, who had purchased a license from Bell.[4] the first contract was for 200 helicopters. The first 50 helicopters of the contract were built by Agusta at Gallarate in Italy followed by 150 built by Westland at Yeovil. The first Westland Sioux made its maiden flight on 9 March 1965.
Design
The Sioux is a three-seat observation and basic training helicopter. In 1953 the Bell 47G design was introduced. It can be recognized by the full "soap bubble" canopy (as its designer Arthur M. Young termed it), exposed welded-tube tail boom, saddle fuel tanks and skid landing gear. In its UH-13J version, based on the Bell 47J, it had a metal-clad tail boom and fuselage and an enclosed cockpit and cabin.
The H-13 and its military variants were often equipped with medical evacuation panniers, one to each skid, with an acrylic glass shield to protect the patient from wind.
A single 260 hp Lycoming VO-435 piston engine was fitted to the 47G variant. Fuel was fed from two high-mounted external tanks. A single two-bladed rotor with short inertial stabilising minor blades was used on the Sioux.
2020-12-06 19:19:32 +0000 UTC
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'Introduces scientific study of trees, including classification & seasonal aspects. Stresses careful observation.'
Originally a public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Tree
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
In botany, a tree is a perennial plant with an elongated stem, or trunk, supporting branches and leaves in most species. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are usable as lumber or plants above a specified height. In wider definitions, the taller palms, tree ferns, bananas, and bamboos are also trees. Trees are not a taxonomic group but include a variety of plant species that have independently evolved a trunk and branches as a way to tower above other plants to compete for sunlight. Trees tend to be long-lived, some reaching several thousand years old. Trees have been in existence for 370 million years. It is estimated that there are some three trillion mature trees in the world.
A tree typically has many secondary branches supported clear of the ground by the trunk. This trunk typically contains woody tissue for strength, and vascular tissue to carry materials from one part of the tree to another. For most trees it is surrounded by a layer of bark which serves as a protective barrier. Below the ground, the roots branch and spread out widely; they serve to anchor the tree and extract moisture and nutrients from the soil. Above ground, the branches divide into smaller branches and shoots. The shoots typically bear leaves, which capture light energy and convert it into sugars by photosynthesis, providing the food for the tree's growth and development.
Trees usually reproduce using seeds. Flowers and fruit may be present, but some trees, such as conifers, instead have pollen cones and seed cones. Palms, bananas, and bamboos also produce seeds, but tree ferns produce spores instead.
Trees play a significant role in reducing erosion and moderating the climate. They remove carbon dioxide from the atmosphere and store large quantities of carbon in their tissues. Trees and forests provide a habitat for many species of animals and plants. Tropical rainforests are among the most biodiverse habitats in the world. Trees provide shade and shelter, timber for construction, fuel for cooking and heating, and fruit for food as well as having many other uses. In parts of the world, forests are shrinking as trees are cleared to increase the amount of land available for agriculture...
Trees are either evergreen, having foliage that persists and remains green throughout the year, or deciduous, shedding their leaves at the end of the growing season and then having a dormant period without foliage. Most conifers are evergreens, but larches (Larix and Pseudolarix) are deciduous, dropping their needles each autumn, and some species of cypress (Glyptostrobus, Metasequoia and Taxodium) shed small leafy shoots annually in a process known as cladoptosis. The crown is the spreading top of a tree including the branches and leaves, while the uppermost layer in a forest, formed by the crowns of the trees, is known as the canopy. A sapling is a young tree.
Many tall palms are herbaceous monocots; these do not undergo secondary growth and never produce wood. In many tall palms, the terminal bud on the main stem is the only one to develop, so they have unbranched trunks with large spirally arranged leaves. Some of the tree ferns, order Cyatheales, have tall straight trunks, growing up to 20 metres (66 ft), but these are composed not of wood but of rhizomes which grow vertically and are covered by numerous adventitious roots...
2020-12-05 22:40:06 +0000 UTC
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'Many scenes of Manchurian industry and transportation. Shows Japanese life and culture in Manchuria. Film is soft-sell justification of Japanese occupation of the territory.'
Originally a public domain film from the Library of Congress Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Manchukuo
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Manchukuo, officially the State of Manchuria prior to 1934 and the Empire of Manchuria after 1934, was a puppet state of the Empire of Japan in Northeast China and Inner Mongolia from 1932 until 1945. It was founded in 1932 after the Japanese invasion of Manchuria, and in 1934 it became a constitutional monarchy. Under the de facto control of Japan, it had limited international recognition.
The area was the homeland of the Manchus, including the emperors of the Qing dynasty. In 1931, the region was seized by Japan following the Mukden Incident. A pro-Japanese government was installed one year later with Puyi, the last Qing emperor, as the nominal regent and later emperor. Manchukuo's government was dissolved in 1945 after the surrender of Imperial Japan at the end of World War II. The territories claimed by Manchukuo were first seized in the Soviet invasion of Manchuria in August 1945, and then formally transferred to Chinese administration in the following year.
Manchus formed a minority in Manchukuo, whose largest ethnic group was Han Chinese. The population of Koreans increased during the Manchukuo period, and there were also Japanese, Mongols, White Russians and other minorities. The Mongol regions of western Manchukuo were ruled under a slightly different system in acknowledgement of the Mongolian traditions there. The southern part of the Liaodong Peninsula continued to be directly ruled by Japan as the Kwantung Leased Territory.
2020-12-05 22:39:31 +0000 UTC
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Silent, with title cards. 'Directed by C.C. Clark and Raymond Evans. Photographed by Corliss Cramer. Contribution from The Weather Bureau.'
Originally a public domain film from the Prelinger Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
https://en.wikipedia.org/wiki/Cloud
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
In meteorology, a cloud is an aerosol consisting of a visible mass of minute liquid droplets, frozen crystals, or other particles suspended in the atmosphere of a planetary body. Water or various other chemicals may compose the droplets and crystals. On Earth, clouds are formed as a result of saturation of the air when it is cooled to its dew point, or when it gains sufficient moisture (usually in the form of water vapor) from an adjacent source to raise the dew point to the ambient temperature. They are seen in the Earth's homosphere (which includes the troposphere, stratosphere, and mesosphere). Nephology is the science of clouds, which is undertaken in the cloud physics branch of meteorology.
...Cloud types in the troposphere, the atmospheric layer closest to Earth's surface, have Latin names... stratiform sheets, cirriform wisps and patches, stratocumuliform layers (mainly structured as rolls, ripples, and patches), cumuliform heaps, and very large cumulonimbiform heaps that often show complex structure... The Latin names for applicable high-level genera carry a cirro- prefix, and an alto- prefix is added to the names of the mid-level genus-types... Very low stratiform clouds that extend down to the Earth's surface are given the common names fog and mist...
Taken as a whole, homospheric clouds can be cross-classified by form and level to derive the ten tropospheric genera, the fog and mist that forms at surface level, and several additional major types above the troposphere. The cumulus genus includes three species that indicate vertical size. Clouds with sufficient vertical extent to occupy more than one altitude level are officially classified as low- or mid-level according to the altitude range at which each initially forms. However they are also more informally classified as multi-level or vertical...
Physical forms
Clouds in the troposphere assume five physical forms based on structure and process of formation...
Stratiform
Non-convective stratiform clouds appear in stable airmass conditions and, in general, have flat sheet-like structures that can form at any altitude in the troposphere. The stratiform group is divided by altitude range into the genera cirrostratus (high-level), altostratus (mid-level), stratus (low-level), and nimbostratus (multi-level). Fog is commonly considered a surface-based cloud layer...
Cirriform
Cirriform clouds in the troposphere are of the genus cirrus and have the appearance of detached or semi-merged filaments. They form at high tropospheric altitudes in air that is mostly stable with little or no convective activity...
Stratocumuliform
Clouds of this structure have both cumuliform and stratiform characteristics in the form of rolls, ripples, or elements. They generally form as a result of limited convection in an otherwise mostly stable airmass topped by an inversion layer. If the inversion layer is absent or higher in the troposphere, increased air mass instability may cause the cloud layers to develop tops in the form of turrets consisting of embedded cumuliform buildups. The stratocumuliform group is divided into cirrocumulus (high-level), altocumulus (mid-level), and stratocumulus (low-level).
Cumuliform
Cumuliform clouds generally appear in isolated heaps or tufts. They are the product of localized but generally free-convective lift where there are no inversion layers in the troposphere to limit vertical growth. In general, small cumuliform clouds tend to indicate comparatively weak instability. Larger cumuliform types are a sign of greater atmospheric instability and convective activity. Depending on their vertical size, clouds of the cumulus genus type may be low-level or multi-level with moderate to towering vertical extent.
Cumulonimbiform
The largest free-convective clouds comprise the genus cumulonimbus which have towering vertical extent. They occur in highly unstable air and often have fuzzy outlines at the upper parts of the clouds that sometimes include anvil tops. These clouds are the product of very strong convection that can penetrate the lower stratosphere.
2020-12-05 22:38:57 +0000 UTC
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Federal Aviation Administration
Physiology of Flight: Hyperventilation
Civil Aerospace Medical Institute.
Originally a public domain film from the National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied.
The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original).
https://en.wikipedia.org/wiki/Hyperventilation
Wikipedia license: http://creativecommons.org/licenses/by-sa/3.0/
Hyperventilation occurs when the rate or tidal volume of breathing eliminates more carbon dioxide than the body can produce. This leads to hypocapnia, a reduced concentration of carbon dioxide dissolved in the blood. The body normally attempts to compensate for this homeostatically, but if this fails or is overridden, the blood pH will rise, leading to respiratory alkalosis. The symptoms of respiratory alkalosis include: dizziness, tingling in the lips, hands or feet, headache, weakness, fainting, and seizures. In extreme cases it may cause carpopedal spasms, a flapping and contraction of the hands and feet.
Factors that may induce or sustain hyperventilation include: physiological stress, anxiety or panic disorder, high altitude, head injury, stroke, respiratory disorders such as asthma, pneumonia, or hyperventilation syndrome, cardiovascular problems such as pulmonary embolisms, anemia, an incorrectly calibrated medical respirator, and adverse reactions to certain drugs. Hyperventilation can also be induced intentionally to achieve an altered state of consciousness such as in the choking game, during breathwork, or in an attempt to extend a breath-hold dive...
2020-12-04 21:47:01 +0000 UTC
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