EDN's Senior Technical Editor Brian Dipert has written an excellent feature on wind turbines and how to site them. He also sides with Scientific American's proclamation that the debate is over: Global warming is a manmade problem.
Low cost, plentiful, clean, and, in all other respects, "green." These words describe wind power in a nutshell. So, why is it so unpopular? The devil is in the details, along with our reluctance to adopt an unknown technology. With fossil-fuel prices on the rise, their supply increasingly unstable, and global-warming effects growing, however, the wind-turbine alternative is garnering overdue attention.
The debate on global warming is over, according to Scientific American (Reference 1). With those no-holds-barred words, the respected journal introduced the theme of its September 2006 special issue, "Energy's Future: How to Power the Economy and Still Fight Global Warming." Diminishing but still lingering debate within the scientific community hasn't completely settled the question of whether — and, if so, to what degree — increased carbon dioxide and other greenhouse-gas concentration in the earth's atmosphere have caused global warming (Figure 1). But Scientific American's Special Projects Editor Gary Stix seems convinced that a material link exists: "Present levels of carbon dioxide — nearing 400 ppm in the earth's atmosphere — are higher than they have been at any time in the past 650,000 years and could easily surpass 500 ppm by 2050 without radical intervention. ... Almost all of the 20 hottest years on record have occurred since the 1980s. No one knows exactly what will happen if things are left unchecked — the exact date when a polar ice sheet will complete a phase change from solid to liquid cannot be foreseen with precision. ... But no climatologist wants to test what will arise if carbon-dioxide levels drive much higher than 500 ppm" (Reference ).
The engineers and inventors of the post WWII period turned their attention to advancements in electronics, communication, and entertainment. Breakthrough inventions range from LEGOs and computer gaming to the integrated circuit and Ethernet -- a range of advancements that have little in common except they changed our lives.
The age of touch could soon come to an end. From smartphones and smartwatches, to home devices, to in-car infotainment systems, touch is no longer the primary user interface. Technology market leaders are driving a migration from touch to voice as a user interface.
Soft starter technology has become a way to mitigate startup stressors by moderating a motor’s voltage supply during the machine start-up phase, slowly ramping it up and effectively adjusting the machine’s load behavior to protect mechanical components.
A new report from the National Institute of Standards and Technology (NIST) makes a start on developing control schemes, process measurements, and modeling and simulation methods for powder bed fusion additive manufacturing.
If you’re developing a product with lots of sensors and no access to the power grid, then you’ll want to take note of a Design News Continuing Education Center class, “Designing Low Power Systems Using Battery and Energy Harvesting Energy Sources."
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.