As all of you know by now my old friend Bob Simons decided to leave the editorial staff of this magazine. Knowing Bob already for many years before he joined the staff in 2000 I was delighted to have him on board. What I always will remember of him are his punctuality, his thorough and elaborate reviews, and his amazing ability to find and correct all kinds of errors in the … [Read more...]
Update on JEDEC Thermal Standards
The Role of Standards The global electronics industry has for decades provided us with an astonishing array of products that have become essential to all aspects of modern life. Equally amazing is that they have done so in the context of a highly distributed supply chain model with hundreds of suppliers located all over the developed world. They are able to coordinate … [Read more...]
Thermal Facts & Fairy Tales: The Temperature Dependence of the Specific Heat
Thermal fact: the temperature dependence of the specific heat can be very large. Thermal fairy tale: neglecting this dependence can be a serious problem. In my Tech Data column of May 2003 the thermal capacitance was discussed. I will repeat here the most relevant issues before discussing its temperature dependence. The thermal capacity (or heat capacity) Cth is defined … [Read more...]
System Level Benefits of Augmenting Fan Cooled Servers with Localized Synthetic Jets
Raghav Mahalingam Nuventix Inc. The cooling needs of data centers and server farms have increased rapidly over the last few years due to the advent of cloud computing. The use of large banks of fans is quite common in such systems and cooling system power is a significant fraction of the operational costs. Additionally, NEBS acoustic requirements limits the use of higher speed … [Read more...]
Detailed System Level Modeling of LEDs
Introduction Developments in solid state lighting (SSL) in recent years have led to an extensive increase in the driving current of light emitting diodes (LEDs). Although corresponding increases in light output and efficiency has also been noted, current lighting design applications require the implementation of multiple diodes to allow its utilization in universal lighting … [Read more...]
- « Previous Page
- 1
- …
- 69
- 70
- 71
- 72
- 73
- …
- 178
- Next Page »
