30 July 1971 landed on the moon the fourth expedition, this time with the car. Training for flight on Earth began on March 26, 1970 — and then became known to the crew’s ninth in a row rockets “Apollo”. Mission commander David Scott and lunar module pilot James Irwin and command module pilot Alfred worden flew out of the space complex Kennedy on 26 July 1971. To earth the astronauts returned on 7 August of the same year.
The fourth expedition is notable in that David Scott and James Irwin spent on the moon of nearly three days (approximately 67 hours). This is directly on the moon’s surface the astronauts spent 18 and a half hours. During this time they collected 77 kg of lunar soil samples and installed a variety of research equipment.
“Apollo 15” is known for the fact that David Scott and James Irwin travelled to the moon in a special lunar vehicle resembling a dune buggy. This Rover was essentially an electric vehicle with a disposable battery. Each wheel is driven by a separate motor with a capacity of only a quarter of a horsepower. This was enough to develop a speed of about 10 km/h, but on one of the sites, the astronauts were able to accelerate to 18 km/h — at that moment they risked, because due to the weak gravity of the moon cool the car Bouncing over the bumps. By the way, the lunar vehicle was not steering — control they had with the T-handle between the seats. In total, the crew travelled 27.9 km, trying not to move away from the lunar module (only members of the “Apollo 17” was allowed to drive for 7 km, after ascertaining the reliability of the spacesuits and the Rover). It is the fourth landing called “one of the most brilliant from a scientific point of view.”
By the way, the Rover has installed the camera, where you could control from the Ground. This allowed to photograph the takeoff of the lunar module. However, because of the three-second signal delay, the operator had to be proactive and start to rotate the lens up when on his screen, the module was still on the surface.
James Irwin and the lunar Rover
30 Jul 2008 NVIDIA has officially presented the video card GeForce 9800 GTX+ and GeForce GTX 9800 GT. These adapters subsequently become iconic and ushered in a new era. In addition, they received the full support of DirectX 10.
2006 and 2007 marked a period of stagnation. NVIDIA has released a flagship solution GeForce 8800 GTX and 8800 GTX Ultra, and ATI/AMD are not able to meet this challenge. In the end, for almost a year and a half on the computer graphics market was observed a complete lack of competition. Green kept high prices for their video cards, but the need for full integration of DirectX 10 (by the time games supporting this API was a lot) forced the company to release new line of graphics cards. Have podobralas and ATI/AMD for the first time since the Radeon X1000 lineup and presented a competitive device. In General, all as usual. Healthy competition has forced manufacturers to produce more efficient solutions at a reasonable price.
These were the GeForce 9800 GTX+ and GeForce 9800 GT. They had still ahead of the current flagship GeForce 8800 GTX and 8800 GTX Ultra, but cost much cheaper: 230 USD for the older model and $ 150 for a younger version respectively. Both cards are equipped with 512 MB of memory standard GDDR3, which was enough for most modern computer games of the time. Chip GeForce GTX 9800 GTX+ uniform consisted of 128 processor cores and operated at a speed of 738 MHz. The “rock” GT-version could boast 112 of the computing units and operated at a frequency of 600 MHz.
NVIDIA GeForce 9800 GTX+