What's New in HVAC Fan Applications Part 3

post from CR4 - Recent Blog Entries on 11 July 2012 11:00:00 AM. © CR4 - Recent Blog Entries

In Part 1 and Part 2 we looked at the redundancy, sound levels, unit length and efficiency. Now we will look at fan isolation, variable frequency drive redundancy and some adjunct issues.Fan IsolationIf redundancy is one of the reasons for selecting a fan array then there are several question

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Close-up of a solar monster

post from Bad Astronomy on 11 July 2012 10:27:35 AM. © Bad Astronomy

Looking back on it, I should’ve realized friend of the BABlog and masterful solar photographer Alan Friedman would send me a jaw-dropping picture of the vastly ginormous sunspot cluster AR1520 that I wrote about yesterday. And of course he did:Holy[...]

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Happy Birthday to NASCARs Monarch

post from CR4 - Recent Blog Entries on 11 July 2012 10:00:00 AM. © CR4 - Recent Blog Entries

We would have been really embarrassed if we'd missed this milestone. In the maelstrom of non-stop motion that constitutes a NASCAR season, many people paused yesterday to wish the eternal King, Richard Petty, best wishes on his 75th birthday. It is impossible to overstate the enormous influe

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An Interstellar Provocation

post from Centauri Dreams on 11 July 2012 09:44:14 AM. © Centauri Dreams

It had never occurred to me that there was something the Graf Zeppelin and the Saturn V had in common. Nonetheless, a re-reading of Freeman Dyson?s paper ?Interstellar Transport? confirms the obvious connection: Like the great airships of the 1930s, the[...]

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Terahertz devices could scan for cancer

post from Top stories on 11 July 2012 09:40:45 AM. © Top stories

Story Source

Cornell researchers have developed a new method of generating terahertz signals on an inexpensive silicon chip, offering possible applications in medical imaging, security scanning and wireless data transfer.

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Toward achieving 1 million times increase in
computing efficiency

post from Top stories on 11 July 2012 09:35:55 AM. © Top stories

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Modern-day computers are based on logic circuits using semiconductor transistors. To increase computing power, smaller transistors are required. Moore?s Law states that the number of transistors that can fit on an integrated circuit should double every two years due to scaling.

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Vocal cords and asthma

post from Sciencebase Science Blog on 11 July 2012 09:22:55 AM. © Sciencebase Science Blog

A diagnosis of exercise-induced bronchospasm – asthma – is commonly given to patients who present with cough, breathlessness and wheeziness after exertion despite being otherwise physically fit. An alternative explanation to bronchial (airways) constriction was discussed on BBC Radio 4′s Inside Health this week on which they suggested that vocal cord dysfunction might be to [...]

Vocal cords and asthma is a post from: Sciencebase Science Blog

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Mr. Deity and the Hitch

post from Top stories on 11 July 2012 09:04:21 AM. © Top stories

Timmy tells Mr. Deity that Hitch has arrived at the Pearly Gates.

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The Value of Quick Iteration

Talk to any reputable design engineer and they will assure you of two things:1. Not everything that looks good on paper will work like it should.2. Multiple design iterations are expected for most projects, especially when entering new territory.(Credit: PingV Inc. -->)In any new design

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How to Build a DIY Solar Air Heater from Old Soda
Cans

From Latest Items from TreeHugger: A Seattle man builds a DIY solar space heater for his off grid office. Here's how. Read the whole article

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