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One of our colleagues at EE Times China told us, Last time when we met with Imagination executives here, they claimed they were a Chinese company.”

LT1795IFE#TRPBF_Datasheet PDF

One of our colleagues at EE Times China told us, Last time when we met with Imagination executives here, they claimed they were a Chinese company.”

The survey also compares some answers between millennials” and verteran” engineers. Here, the survey takes on a more marketing tone, asking how engineers gain knowledge and educate themselves. Millennials are more likely to rely on colleagues and videos than veteran engineers while veteran engineers favor conferences and webinars. In the case of younger engineers relying on colleagues and peer-to-peer interaction to gain knowledge, are the millennials getting that knowledge from veteran engineers of from other millennials, perhaps through online forums? We don’t know.

What’s going on at your place of work?

LT1795IFE#TRPBF_Datasheet PDF

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As more and more companies begin to use machine learning as part of normal business operations, those investing in their own hardware for whatever reason are now faced with a choice of different accelerators as this ecosystem begins to expand. When choosing between the very different chip architectures that are coming to the market, performance, power consumption, flexibility, connectivity and total cost of ownership will be the obvious criteria. But there are others.

LT1795IFE#TRPBF_Datasheet PDF

Alexis Crowell (Image: Intel)

LT1795IFE#TRPBF_Datasheet PDF

Last week I spoke with Alexis Crowell, Intel’s senior director of AI product marketing, on this topic. Intel offers various AI accelerator products with completely different architectures (including, but not limited to, Movidius, Mobileye, Nervana, Loihi, not to mention all the CPU products). Crowell was happy to highlight some of the less obvious criteria that should be considered when choosing an AI accelerator.

•For large-scale cooling, a team at the Universe of Buffalo (NY) has developed a box-like design which radiates building heat towards the sky; as a sort of transmitting antenna for heat. It sues and an inexpensive polymer/aluminum film  that us placed inside a box at the bottom of a specially designed solar shelter,” (Figure 1 ). The film keeps its surroundings cool by absorbing heat from the air inside the box and then transmitting that energy through the Earth’s atmosphere into outer space (talk about away!). The shelter both blocks incoming sunlight while also sending the thermal radiation emitted from the film into the sky.

The polymer stays cool as it dissipates heat through thermal radiation, and can then cool down the environment,” says co-first author Lyu Zhou, a PhD candidate in electrical engineering in the School of Engineering and Applied Sciences. This is called radiative or passive cooling, and it’s very interesting because it does not consume electricity — it won’t need a battery or other electricity source to realize cooling.”

During the day, the combination of film and solar shelter reduced the temperature of a test box measuring about 46 cm high × 10 cm square by about 6⁰C, while at night the decrease was about 11⁰C.). At night, that figure rose to about 11 degrees Celsius (about 20 degrees Fahrenheit). They calculated the average cooling power for the set-up to be ~120 W/ m2 . Full details are available in their paper A polydimethylsiloxane-coated metal structure for all-day radiative cooling” published in the journal Nature Sustainability .

•At the University of Utah, researchers are exploring developments using nearfield (subwavelength vacuum-gap spacing) radiative heat transfer (NFRHT) where transfer rates can exceed the far-field blackbody limit between planar surfaces, which is an upper bound on how much energy can be produced from thermal radiation. The Utah team has demonstrated that they can go well beyond the blackbody limit if they create a device that uses two silicon surfaces very close together (no, they are not claiming they output more energy than they put into the device; this is a conversion and transfer arrangement.


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