Archive for the knowledge Category

Dell’s HPC solution for up to 16 GPUs

November 3rd, 2010 | knowledge | Comments Off

Dell’s HPC solution for up to 16 GPUs

The PCIe Expansion Chassis PowerEdge C410x holds up to 16 Tesla modules from Nvidia. The system has no CPUs or memory chips. It is designed for connection to a Dell PowerEdge C6100.

Dell has presented the PCIe Expansion Chassis PowerEdge C410x for the high-performance computing market (HPC). It was especially for complex compute-intensive demands of science and technology develops.

The PCIe expansion chassis provides 16 slots for GPUs. It is available with Nvidia Tesla GPUs M1060 or M2050. The maximum usable 16 Tesla M2050 modules is a computing power of up to 16.48 Teraflops available.

The system has no CPUs or memory chips and is specially optimized for recording and efficient cooling of GPUs or other PCIe products. This chassis offers an extremely high density with low power consumption and reduced costs.

The expansion unit is designed for connection to a Dell PowerEdge C6100, which has four server nodes, each with two sockets. But it can also be connected to a different server with the appropriate host interface.

Dell HPC is that a small but rapidly growing market. Particularly in relation to cloud computing and solutions for the scientific research in Cambridge about Dell and Intel in J眉lich Exaflops of so-called clusters. Floating Point Operations Per flops are Second, floating-point calculations per second – a measure of the performance of supercomputers. The term Exaflops describes the processing of a trillion – a one with eighteen zeros – instructions per second.

The PCIe Expansion Chassis PowerEdge C410x holds up to 16 modules from Nvidia Tesla (Photo: Dell).

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Pollution-free fuel cells

October 11th, 2010 | knowledge | Comments Off

Pollution-free fuel cells

“In the future if the phone battery died in the field, we only need a mobile phone back shell of the tube the size of the hair to add methanol to the cell phone is fully charged can continue like normal.” Painted this wonderful picture of the Guangzhou University Hydrogen fuel cell technology and new catalyst project leader Professor Lin Weiming. Chemistry and Chemical Engineering school has recently developed a hydrogen fuel cell technology and new catalysts, fuel cells can not only reduce the concentration of toxic components, but also to improve fuel utilization and extend the life of fuel cells can be computers, mobile phones , car, etc. application.

As we all know, fuel cell fuel is mainly composed of hydrogen and oxygen, the most prominent feature is the “clean”, known as the most attractive of the 21st century generation methods.

The performance of the fuel cell catalyst plays a key role in the fuel before the fuel cells need to add methane, methanol reaction, both are indispensable. However, Professor Lin Weiming the research team tested successfully using methanol as a fuel alone, the addition of the catalyst will be able to generate electricity, “Now the fuel cell power conversion rate of 70% -80%.”

By adding a catalyst to reduce the fuel cell reaction produces carbon monoxide, to extend battery life is also one of their research. Fuel cell reaction in the fuel will produce about 1% of carbon monoxide, and carbon monoxide will make fuel cell “poisoning” and shorten battery life. Wei-Ming Lin said they discovered after numerous tests, using the new catalyst, the absorption rate of carbon monoxide can be increased to about 99%, thereby reducing the battery “poisoning” the possibility of extending life.

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Promoted to first division

September 9th, 2010 | knowledge | Comments Off

Promoted to first division

The cosmetics manufacturer Beiersdorf and the steel producer Salzgitter gets two new additions to the German stock index DAX. This requires the tire maker Continental and the real estate financier Hypo Real Estate vacate their seats.

The first stock exchange league enough future to Hamburg first time in the 20-year history of the German Dax stock index moves up with the Nivea manufacturer Beiersdorf Group from Germany’s second largest city in the leading index.

As the German stock exchange yesterday evening announced after the market closes, will also be added to the Lower steel tube manufacturer and Salzgitter in the Dax. This requires the tire manufacturer Continental (Hanover) and the real estate financier Hypo Real Estate evacuate (HRE / Munich) their places. HRE and Conti will continue in the MDAX of medium-sized listed values. The changes are effective as at 22 December. Last of the Kassel K + S fertilizer companies for tourism and shipping group Tui was moved up in the Dax.

“We are very pleased to now be among the top 30 listed companies in Germany” are one, “said the CEO of Beiersdorf AG, Thomas-B. Quaas. “We Nivea have done in recent years in the market for skin and beauty care for the world number one. And we are confident that we will continue to develop better than the market. ”

Salzgitter sees in the Dax-rise and a confirmation of its successful growth strategy. “We are very pleased about this rise, but remain with both feet on the ground. Exaggerated expectations of the change we cherish not, “said company spokesman Bernd Gersdorff. However, it is desirable, medium and long term to remain in the segment.

A Continental spokesman said in Hanover: “We are still of the opinion that Continental is in the Dax and also in the sense of the index continuity to remain in the Dax pleads.” Even in the course of the takeover offer by Schaeffler Group shares offered are not freely tradable on the stock exchange. In addition, Conti expect that even after a takeover still enough shares will be freely tradable, to meet the criteria of the German stock exchange.

A HRE spokesman in Munich did not comment on the Dax-down of real estate financier. Hypo Real Estate in the wake of the financial crisis had happened on the verge of collapse. The market value of the group broke a dramatically this year: The market capitalization of tradable shares (free float) fell since the beginning of 7.6 billion euros to 623 million euros.

After the Frankfurt market operator as a result of the turbulence at the carmaker VW papers had amended its rules index is a proportion of freely tradable shares of at least ten (previously five) percent requirement for all in the German indices noted values.

The M-Dax value AMB Generali has to leave because of his insufficient free float share all indices. According to the decision of the Working Group equity indices of Deutsche Borse for the shares of the specialty packaging manufacturer Gerresheimer in the index of the medium value is taken.

The technology index Tec-Dax lost – partly because of the new free float system – the telecom company Versatel and electronics specialist Epcos their places at Smartrac and Jenoptik. In the S-Dax vacant space of the M-Dax-climber Gerresheimer and the S-Dax-places of SME Bank and IKB HCI Capital are held by Klockner-Werke, Loewe and Delticom.

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Promoted to first division

The old equipment

September 9th, 2010 | knowledge | Comments Off

The old equipment

Cordless phones really make life easier. But beware: Some very old equipment to radio waves, which are banned from next year. Anyone who buys a new phone, you can expect heavy fines of up to 2,000.

The difference is in some obscure abbreviations. Are prohibited from January devices to cordless CT1 + standard analog transmission, the CT and get second These devices are likely only in very few households, as was already foreseen in 1998 that these standards are eventually eliminated.

The problem: These phones use certain wavelengths that are reserved in 2009 for phone calls. From then on E-Plus and O2 customers will be calling on these frequencies or surf the mobile Internet. On the freedom when cordless phone must therefore not be waived, but a few for my current device.

For current cordless phones use the so-called DECT StandardDECT stands for “Digital European cordless telecommunications” and introduced in 1992 called the European standard for digital radio transmission. It connects with cordless phones, the mobile handset with the base station. Advantages of DECT is the high voice quality and privacy, the identification of the handset and base station and subscriber identification. With DECT, up to twelve handsets to be connected to the base. That is secure, and guarantee better quality. Do not panic: In most households, these machines are in use for years. According to Manfred Breul, head of the telecommunications industry association Bitkom, have responded to large manufacturers many years ago and stopped production of the old equipment.

From the Far East were in the aftermath, however, still get a lot of cheap imports into Germany. “It may be true that have been sold this year even the analog standard equipment,” he warns. Therefore it is difficult to estimate how many such phones are currently in use.

But how can you find out whether one uses one of the banned phones soon? Here the view helps in the manual. “Should not be available, you can also enter the type name of the phone into an Internet search engine and you’ll have the necessary information,” advises the expert. These data are usually found on the underside of the base station. If both methods do not lead to a result that also helps a simple test.

Therefore you must be on the phone from the base station to leave. In the disputed equipment breaks the connection does not suddenly, but is overlaid by a higher noise. A modern DECT phone You can tell that it comes at too great a distance to sudden interruptions, the connection quality has previously not abated.

Those who still remains one of the prohibited uses as of January phones must face heavy penalties. To track down the old equipment, drive test car of the Federal Network Agency, through residential areas or go to Display. “The effort to identify the source of interference may be 1000-2000, and is the user of the phone by the Federal Network Agency is charged.” Addition could also be imposed a fine. Mild to the user is likely not to share. “There are already ten years a transition period. At some final time must also be “stressed the expert.

Cordless phones have become anything but expensive in the supermarket or wholesale electronics there are simple devices from 20. Even those who prefer a neat device with voice and sound equipment like something, it must not spend so much more: The testers Connect the journal have been tested at the end of time, some devices out there for under 100.

For the winner was crowned with the narrow lead Sinus A 501 of the Deutsche Telekom. The telecom markets the devices under its own name, they are manufactured by Siemens. In addition to the convenient phone number management praised the magazine the integrated answering machine. Only the power system, it was easy deductions have here the testers wanted a little more frugal. In Internteshops the devices are to have from 70 plus shipping.

Hardly a bad cut from the Panasonic KX-TG8321. Here are enchanted by the elegant design, but also on the equipment, processing, and gave the readings it nothing to criticize. No wonder the Japanese manufacturers can point to many years of experience in the development of cordless phones. Of course the Panasonic device has an integrated answering machine the same. Only when there is power for improvement, according to Connect, the testers wanted a modern switching power supply. The price on the internet search revealed to the KX-TG8321 at a price of 65 plus shipping.

For the price of the magazine has named Tip the Swiss Avena 758th Ironically, the device now costs more than the competitor to Panasonic and is on par with the telecom model. Such price hikes are not uncommon after testing devices have cut heavily. Advantage of the Swiss model is its economy, it must be an owner to live with a smaller screen than the first and second place. Currently, online retailers require from 70 for the Avena 758, then to get the shipping costs.

With the online purchase can save a lot of money, in part, the potential savings is 30 percent or more compared to the retail price. However, there are hunting for bargains a few things to note, as the news.de-shopping guide explains.

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The old equipment

Environmental badge does not stop Stinker

August 30th, 2010 | knowledge | Comments Off

Environmental badge does not stop Stinker

Are the current test methods of emissions inspection still time? Especially with diesel experts doubt the validity of the measurement method. The requirements for the diesel study are from the 80s.

The establishment of environmental zones has kicked up some dust. They are supposed to reduce pollution of the inner cities by dangerous particles. Therefore, older diesel vehicles that emit very much soot, were banned from smoking.

Into it since they can only if they are retrofitted with a particulate filter and provided as evidence of the cleaned exhaust gases with an environmental badge. New diesel models have the filter as standard now on board. What is the technological effort, however, brings to the residents, no one can say. For whether the required emission levels are met, not controlled.

The legislature is currently writing, for routine emission test (AU) for diesel vehicles, only one function test and an inspection before the so-called opacity of exhaust gases, said Bert corporal by TUV Nord. The examiner looks in determining whether the exhaust system is technically in order. For cars with on-board diagnostic (OBD) is also controls whether the electronic displays an error.

The measurement of smoke opacity of the exhaust is loud corporal with the so-called Opacimeter: This is the revving of the engine blown gas flow through a meter. This one light beam is sent through a tube filled with the exhaust gas and measuring the light fraction that is swallowed by the waste gases “. The absorption must not exceed specified limits.

A more detailed analysis of the emission behavior is by this method, which was introduced in the 80 years to get the biggest stinker diesel from the road, not possible. It can not determine the amount of corporal, according to the emitted soot particles. However, this is crucial, among other things, whether the car gets an environmental badge – and if so, which.

The experts therefore had to consider within the AU is no possibility that a diesel vehicle bears the red, yellow or green sticker on environmental law, recognizes a corporal. Also says nothing about the measurement of whether a retrofit soot filters to function properly and the car still allowed to drive in the LEZ. “The AU we would not notice.”

The testing organizations can not be blamed. You must abide by the legally established procedures. “Not” The measurement methods conform to the current state of technology, said Hans-Juergen Maeurer, head of development for testing the expert organization Dekra. The AU-measurement lags behind kind of engine development.

From the consumer perspective is not the current situation unacceptable, says Gerd Lottsiepen of Transport Club Germany (VCD), “Today, customers pay for something that does not work. It would have to come urgently a new trial. “Acknowledges that not a meaningful emissions inspection for customers will be more expensive. It must however be at least ensures that key technical systems work well in the car.

“If you make an environmental test, the test also measure it, is to measure what he” says Lottsiepen. After all, he has not given up hope that the legislature in the future but still grinds to a better measurement methods. Thus, there exists at least a first reflection, the framework of the AU to adapt accordingly.

For the exhaust emission test (AU) for passenger cars are basically the same terms as for the main study (HU). For new cars, according to the ADAC, the first test date after 36 months is due. All the following tests are then at the 24-month rhythm. Freed from the AU principle gasoline remain first registered before 1 July 1969 and diesel first registered before 1 January 1977. Even vehicles with red plates or temporary plates and of agricultural and forestry tractors, self-propelled machinery and trucks are excluded from the investigation.

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