I want to start off with a look at the four methods of cooling: conduction, convection, radiation, and pumping. What? They don't teach the four methods of cooling in physics class? Only the first three? The fourth method is a combination of the first three with the addition of pumps.
Management Consultant Dave Logan at CBS Moneywatch is warning companies to avoid falling in love with company policy. He talks about a company that wanted to hire a very disruptive genius. But HR said it wasn't possible because they had no job description for the function envisioned. And besides the guy was obviously a poor fit and a possible cause for resentment by the rest of the employees.
I recently designed a low power, low noise, power supply for digital work. The nominal output voltages as designed are +5 volts and +3.3 volts. One hundred and fifty milliamps each. With a lightly regulated five volt supply for powering LED back lights.
Being "green" has gone from a technical effort to economically reduce energy use and avoid waste where such avoidance makes sense to actively reducing our effectiveness to show how committed we are to the Green Religion. And there is so much of this going on. In my opinion we would be much better off worshiping trees. Or cows.
CBS News Money Watch has a great post up on how to improve management effectiveness. That includes both self and corporate management. The technique is common in the military but not so common in the corporate world. It is the after action report.
I hand-solder. I hand-solder surface-mount devices. So far, my standard practice is to use parts no smaller than 0603s (inch), and for ICs I get them with pitches no smaller than 0.65 mm. This causes problems when I need a component that is too small for me to solder on a board with techniques I have been comfortable with up to now.
The First Mate and I were discussing this Harvard Business Review article the other day, and I noticed a lot of allusions to myself. The article is about how to manage creative types. There are seven main points (numbered), but I'm only going to comment on a few.
As if we didn't have enough to worry about with government tracking and collecting information on our every move, we also have to be on the lookout for data pirates. Although, if the pirates get their hands on the government databases, the problem begins to look like a single problem with diverse parts.
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I'm in the process of designing an I2C system that uses telephone cable to route the signals around. It uses standard four-conductor cables with RJ-11 type plugs on the ends. For my system, it is important that there be no twists in the cable. Getting the signals reversed (clock and data) is not too bad. It will just prevent the system from working.
The life of a light-emitting diode (LED) isn’t as simple as some advertisers may lead you to believe. Manufacturers offer numbers like 100,000 hours as the expected lifetime of high-powered LEDs, but those numbers reflect calculations done using optimum conditions and specification points.
I don't have a lot to say today. I'm busy on the bench building things. But I have come across a few good tools and soldering helpers, so I thought I'd provide a few links. Harbor Freight has a couple of good items. Yes. I know it is easy to buy junk there, which is why I thought I'd mention these two items.
I got an e-mail from a friend recently railing against what he called (loosely translated by me) "Green Energy Pirates". Let me quote one sentence from his e-mail. "There is a whole slew of companies that move from subsidy to subsidy globally and then abandon 'green projects' when the subsidies dry up."
It looks like we may have more available oil than we thought, thanks to a new procedure called array fracking. What does that mean? It means that the oil boys are drilling the oil holes closer together. And since fracking is about horizontal drilling, that means the wells are parallel to each other.
A new element is being added to the drone wars: Micro Drones. You can watch a five-minute video by the Air Force that looks at the development of M.A.V - Micro Killer Drones. Done in the usual dominating voice that the people promoting superior military technology seem to like for their videos.
ECN recently published an article from Eurekalert! on the limits of large scale wind power. I thought it might be a good idea to go to the source to find out if the posted article reflected the actual paper. The first thing I found without any effort at all (it was in the abstract) is that the Eureka people got the previous maximum-estimated wind source number wrong.
I was planning to write about software patent trolls and was entering "software patents" in my search engine when it offered the suggestion "are evil" to complete the phrase. I'll buy that. So to encourage more traffic here, that is the title of this post. Yes. I have been blogging for quite some time.
I was reading one of the logistics magazines I regularly get and found out something amazing. By about 2020, roughly 80 percent of the lift trucks in America will be powered by hydrogen fuel cells. The fuel cell advantage is constant voltage output and longer continuous run time.
Back in 1968 when I was just starting out as a very junior engineer, I worked for Chromatronix designing sensors for and building High Pressure Liquid Chromatography (HPLC) equipment. In those days, "High Pressure" was 500 psi going up to 1,000 psi with research on 3,000 psi equipment well underway.
As a former Naval Nuke, I was intrigued by a recent paper on climate. It looks at atmospheric circulation in terms of water vapor condensation. A steam engine if you will. The paper claims that winds are driven by the condensation of water vapor, and the resultant variations in local atmospheric pressure that the condensation causes.
A recent press release at ECN, NTU research embraces laser and sparks cool affair, prompted me to go looking for the source of the report, which was an article in Nature Magazine. The article explains a lot of things. One of those things is that the cooler is not the panacea described in the press release.
The Consumer Electronic Show (CES) has been in the news at ECN, but boy was I surprised when my home town paper featured a CES story on its front page this past week. The story was mainly about Prescient Audio, a local company that has designed a new type of bass driver that will reduce the volume such drivers take up in cars.
ECN recently published a piece slamming Texas for passing a law that "allows Texans to make and sell the old-fashioned inefficient kind of bulbs". The author further states that the goal of the national law Texas is opposing "was to lower U. S. energy usage." It will do no such thing. It will increase electrical usage. We have known this since Economist William Jevons discovered the principle in 1865.
The first mate gave me a heads-up about about the state of wind energy locally. Gamesa USA is pulling out of a proposed wind farm development in Ogle County, Illinois. saukvalley.com reports....
Ever since Polywell Fusion caught my attention, superconducting magnets have been a large side interest of mine. I keep track of papers published in the field through IOP Science - Superconductor Science and Technology. They post a list of papers every month which are freely available for personal use for the first month after publication.