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Topic Review
Radeon 9000 Series
The R300 GPU, introduced in August 2002 and developed by ATI Technologies, is its third generation of GPU used in Radeon graphics cards. This GPU features 3D acceleration based upon Direct3D 9.0 and OpenGL 2.0, a major improvement in features and performance compared to the preceding R200 design. R300 was the first fully Direct3D 9-capable consumer graphics chip. The processors also include 2D GUI acceleration, video acceleration, and multiple display outputs. The first graphics cards using the R300 to be released were the Radeon 9700. It was the first time that ATI marketed its GPU as a Visual Processing Unit (VPU). R300 and its derivatives would form the basis for ATI's consumer and professional product lines for over 3 years.
  • 385
  • 03 Nov 2022
Topic Review
Surface Acoustic Wave
A surface acoustic wave (SAW) is an acoustic wave traveling along the surface of a material exhibiting elasticity, with an amplitude that typically decays exponentially with depth into the material. Materials with relatively high magnitude of Young's modulus (e.g., buildings) can be destructed once exposed to strong SAWs (as in earthquakes), whereas, those with relatively low Young's modulus (e.g., bubbles,and biological cells) can start to oscillate when driven by weak SAWs.
  • 851
  • 03 Nov 2022
Topic Review
Tanks in France
French development into tanks began during World War I as an effort to overcome the stalemate of trench warfare, and largely at the initiative of the manufacturers. The Schneider CA1 was the first tank produced by France, and 400 units were built. The French also experimented with various tank designs, such as the Frot-Laffly landship, Boirault machine and Souain experiment. Another 400 Saint-Chamond tanks were manufactured from April 1917 to July 1918, however these tanks were largely underpowered and of limited utility due to the design of the caterpillar tracks, which were too short in comparison with the tank's length and weight. The most significant French tank development during the war was the Renault FT light tank, which set the general layout for future tank designs and was used or redesigned by various military forces, including those of the United States.
  • 1.0K
  • 03 Nov 2022
Topic Review
First Assistant Engineer
A first assistant engineer (also called the second engineer in some countries) is a licensed member of the engineering department on a merchant vessel. This title is used for the person on a ship responsible for supervising the daily maintenance and operation of the engine department. They report directly to the chief engineer. On a merchant vessel, depending on term usage, "the First" or "the Second" is the marine engineer second in command of the engine department after the ship's chief engineer. Due to the supervisory role this engineer plays, in addition to being responsible for the refrigeration systems, main engines (steam/gas turbine, diesel), and any other equipment not assigned to the Second assistant engineer/third engineer or the Third assistant engineer/fourth engineer(s), he is typically the busiest engineer aboard the ship. If the engine room requires 24/7 attendance and other junior engineers can cover the three watch rotations, the first is usually a "day worker" from 0800-1700, with overtime hours varying according to ship/company. The first assistant/second engineer is usually in charge of preparing the engine room for arrival, departure, or standby and oversees major overhauls on critical equipment.
  • 1.7K
  • 03 Nov 2022
Topic Review
ATtiny Microcontroller Comparison Chart
ATtiny (also known as TinyAVR) are a subfamily of the popular 8-bit AVR microcontrollers, which typically has fewer features, fewer I/O pins, and less memory than other AVR series chips. The first members of this family were released in 1999 by Atmel (later acquired by Microchip Technology in 2016).
  • 3.8K
  • 03 Nov 2022
Topic Review
FYFT G-Series Unmanned Blimp
FYFT G-series unmanned blimps are Chinese UAVs developed by Qingdao Co., Ltd. Fei-Yu (meaning Flying Universe) Aviation Science and Technology Co., Ltd. (FYFT, 青岛飞宇有限公司), and these unmanned blimps are named after their respective length. For example: if an G1 series blimp is 11 meter long, then it is named G1-1100, because 11 meter is equal to 1100 millimeter. The letter G stands for General (purpose).
  • 393
  • 03 Nov 2022
Topic Review
Nose Ring (Animal)
A nose ring is inserted into the nose of an animal. Nose rings are used to control bulls and occasionally cows, and to help wean young cattle by preventing suckling. Nose rings are used on pigs to discourage rooting. Some nose rings are installed through a pierced hole in the nasal septum or rim of the nose and remain there, while others are temporary tools.
  • 5.4K
  • 03 Nov 2022
Topic Review
BMW ActiveE
The BMW ActiveE was a demonstration electric car based on the BMW 1 Series small family cars. It was the second vehicle after the Mini E to be developed under BMW Group’s Project i. The electric drive system was the latest addition to BMW’s EfficientDynamics programme. The US Environmental Protection Agency official range is 151 kilometres (94 mi), with an energy consumption of 33 kW·h/100 miles, and the agency rated the ActiveE's combined fuel economy at 2.3L/100 km (102 miles per gallon gasoline equivalent). The four-seater, rear-wheel drive ActiveE was unveiled at the North American International Auto Show in Detroit in January 2010. Deliveries of the ActiveE for field testing in the U.S. began in January 2012, after the Mini E trial ended. A total of 1,100 vehicles were planned to participate in the program worldwide, with 700 allocated for the U.S. trial and 35 to a trial in China.[needs update] Participants in the Mini E trial had priority to lease the new electric car. Production began at BMW's Leipzig plant in July 2011. After the field trial of the Mini E, BMW took reservations for drivers, who BMW calls "Electronauts", in mid-2012. The field trial of the ActiveE started in early 2012. BMW stopped accepting reservations for the ActiveE, and has leased out all of their ActiveE cars. The lease details were similar to that of the Mini E lease details, a two-year limited lease with free maintenance. The lessee had to complete online surveys and take their ActiveE into their local BMW dealership for analysis and service periodically. Once the ActiveE program ended, all ActiveE cars were taken off of the road. Lessees returned their ActiveE vehicles to BMW, and were not able to purchase them. The cars were donated to tech schools or museums for analysis and disassembly, as well as for display purposes.
  • 1.0K
  • 03 Nov 2022
Topic Review
Coyote Reconnaissance Vehicle
The Light Armoured Vehicle II (LAV II) Coyote (and the related Bison) are armoured cars (or armoured personnel carriers) built by General Dynamics Land Systems Canada for the Canadian Forces. They are a later generation of the LAV-25 and of the same family as the Australian ASLAV, as all are part of the Light Armoured Vehicle family produced by General Dynamics Land Systems - Canada and based on the MOWAG Piranha 8x8.
  • 1.3K
  • 03 Nov 2022
Topic Review
BMW 3 Series (E46)
The BMW E46 is the fourth generation of the BMW 3 Series, which was produced from 1997 to 2006. The body styles of the range are: All-wheel drive, last available in the E30 3 Series, was reintroduced for the E46 on the 325xi, 330xi and 330xd models. The E46 was the first 3 Series to be available with an engine using Valvetronic (variable valve lift). Various electronic features were also introduced to the 3 Series in the E46 generation, including satellite navigation, electronic brake-force distribution, rain-sensing wipers and LED tail-lights. Following the introduction of the E90 3 Series sedans in late 2004, the E46 began to be phased out. However the E46 coupé and convertible body styles remained in production until 2006. The E46 M3 is powered by the S54 straight-six engine with either a 6-speed manual or a 6-speed SMG-II transmission. The M3 was introduced in late 2000 and was produced in coupé and convertible body styles only.
  • 45.0K
  • 03 Nov 2022
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