Wednesday, June 24, 2009

Solar Energy Car | Solar Electric Car

A solar vehicle is an electric vehicle powered by a type of renewable energy, by solar energy obtained from solar panels on the surface (generally, the roof) of the vehicle. Photovoltaic (PV) cells convert the Sun's energy directly into electrical energy. Solar vehicles are not practical day-to-day transportation devices at present, but are primarily demonstration vehicles and engineering exercises, often sponsored by government agencies.
Solar cars combine technology typically used in the aerospace, bicycle, alternative energy and automotive industries. The design of a solar vehicle is severely limited by the energy input into the car (batteries and power from the sun). Virtually all solar cars ever built have been for the purpose of solar car races (with notable exceptions).

Solar cars are powered by the sun's energy. The main component of a solar car is its solar array, which collect the energy from the sun and converts it into usable electrical energy. The solar cells collect a portion of the sun's energy and stores it into the batteries of the solar car.

The car weighs in at around 400 kilograms with two occupants ballasted to 80kg each and uses mainly carbon fibre throughout its construction. It also uses aluminium, kevlar and carbon kevlar composite parts, this is what makes it possible to build such a lightweight vehicle.

As far as suspension and steering goes this car is very similar to any road car, however, it is all machined from aluminium making it very light. The wheels are made from carbon fibre and use Michelin low rolling resistance solar car tyres.

Tuesday, June 9, 2009

AMD Opteron Processor

The Opteron is AMD's x86 server processor line, and was the first processor to implement the AMD64 instruction set architecture (known generically as x86-64). It was released on April 22, 2003 with the SledgeHammer core (K8) and was intended to compete in the server/workstation market, particularly in the same segment as the Intel Xeon processor. Processors based on the AMD K10 microarchitecture (codenamed Barcelona) were announced on September 10, 2007 featuring a new quad core configuration.
Professionals who need cuttingedge 32- and 64-bit performance choose workstations powered by AMD Opteron processor. Loaded with advanced power management features and built on AMD's revolutionary Direct Connect Architecture, which provides outstanding system level performance, platforms based on AMD Opteron processor provide ideal solutions for customers running applications in fields such as engineering, manufacturing, financial, entertainment, oil and gas, life sciences, or others that require world class computational performance.

Multi Processor Features:

In multi processor systems (more than one Opteron on a single motherboard), the CPUs communicate using the Direct Connect Architecture over high speed Hyper Transport links. Each CPU can access the main memory of another processor, transparent to the programmer. The Opteron approach to multi processing is not the same as standard symmetric multiprocessing instead of having one bank of memory for all CPUs, each CPU has its own memory. Thus the Opteron is a Non Uniform Memory Access (NUMA) architecture. The Opteron CPU directly supports up to an 8 way configuration, which can be found in mid level
servers. Enterprise level servers use additional (and expensive) routing chips to support more than 8 CPUs (cores, ie 2x quad) per box.


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