Author Archives: curiouscat

TX Active Cement

TX active cement graphic

Industry scrambles to find a ‘greener’ concrete

While Italcemente’s smog-eating cement has been used in Europe for several years, it was released in the United States only in 2007 under the name TX Active. It contains titanium dioxide, which, in the presence of sunlight, acts as a photocatalyer, hastening the decomposition of such pollutants as nitrogen oxides, sulfur oxides, and ozone. TX Active also keeps a building shiny white – a quality admired by architects – by preventing the buildup of pollutants on the surface.

Research suggests that if 15 percent of the surface area of Milan, Italy, were covered in TX Active, air pollutants there could be reduced by 50 percent.

When weighing the environmental effects of concrete, some other benefits need to be included, says Rick Bohan of the Portland Cement Association (PCA), a nonprofit trade group based in Skokie, Ill. For example, the insulation provided by concrete walls combats greenhouse-gas emissions by reducing the energy needed for heating and cooling a building by up to 40 percent compared with wood- and steel-frame structures, according to PCA research.

TXActive Cement graphic from HeidelbergCement

Geek Pad Paper

Geek Pad provides programming, engineering and science students paper with a subtle grid to help organize notes and draw graphs. I don’t exactly see this as revolutionary as the web site claims, but you might find it useful. Plus I like that it was created by a college junior pursuing a B.S. in electronics engineering.

RoboCup German Open 2008

Video of humanoid robot football (soccer) competition in German, April 2008. They are a bit slow but it sure looks like this is a fun area to watch the improvement of robot engineering.

Alligator Blood Provides Strong Resistance to Bacteria and Viruses

Gator Blood May Be New Source of Antibiotics

The study authors, from McNeese State University and Louisiana State University, said their research is the first to take an in-depth look at alligator blood’s prospects as an antibiotic source. According to the researchers, alligators can automatically fight germs such as bacteria and viruses without having been exposed to them before launching a defense.

For the study, the researchers extracted proteins known as peptides from white cells in alligator blood. As in humans, white cells are part of the alligator’s immune system. The researchers then exposed various types of bacteria to the protein extracts and watched to see what happened.

In laboratory tests, tiny amounts of these protein extracts killed a so-called “superbug” called methicillin-resistant Staphylococcus aureus, or MRSA. The bacteria has made headlines in recent years because of its killing power in hospitals and its spread among athletes and others outside of hospitals.

The extracts also killed six of eight strains of a fungus known as Candida albicans, which causes a condition known as thrush, and other diseases that can kill people with weakened immune systems.

Gmail Failure

I really liked Gmail. Today Google has blocked me from accessing my email. I do nothing that remotely could be considered suspicious behavior. Yet without any preliminary warnings Gmail just blocked my access to email and provides only the following.

While this might not be evil it is extremely bad service. Email users need to trust providers to provide reliable service. To act with integrity, etc.. When instead they take unilateral, immediate action with no significant response one can only draw the conclusion that they are dealing with another Verizon or Comcast or the long litany of companies that cannot be trusted to treat you well or even remotely fairly.

They do provide a form to fill out, which I have done. They responded with the following: “Thanks for your report. We apologize for any confusion or inconvenience. For your security, we may temporarily disable access to your account if our system detects abnormal usage. It will take between one minute and 24 hours for you to regain access, depending on the behavior our system detected.”

Not really clear is it? I still have no access. Google’s “mission”: “Google’s mission is to organize the world’s information and make it universally accessible and useful.” How about making clear the information that Google itself says it has detected, this “abnormal usage.” Have they even made that information “accessible and useful.” No they have not. Google choosing to break Gmail access without notice and without explanation and even after questioning still providing no real explanation seems like a very serious threat to users of Gmail. Google seems to believe that breaking access to Gmail is not something they need to even know why they are doing it. I would say a policy that makes Gmail unreliable for users threatens to send users to a provider that does not chose to act in such a way. This seems like a very bad policy on Google’s part.

This is so frustrating, I actually liked gmail. But I guess I will have to look for a reliable provider unless Google can actually provide an explanation of how they will change to actually provide reliable email services.

My account is back now. Maybe it was down for an hour. Which, frankly, if it had been a technical glitch I would have been fine with. That it was a policy decision to break access without notice or explanation I find extremely worrying, however. How am I suppose to trust that they will not do so at any point in the future. If they send me some explanation of this choice to disable my account temporarily, I will update this post.

Data Center Energy Needs

It’s Too Darn Hot

The tech industry is facing an energy crisis. The cost of power consumption by data centers doubled between 2000 and 2006, to $4.5 billion, and could double again by 2011, according to the U.S. government. With energy prices spiking, the challenge of powering and cooling these SUVs of the tech world has become a major issue for corporations and utilities.
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The modern data center is like a vast refrigerator with hundreds or thousands of ovens blazing away inside. Six-foot-tall metal racks stacked with pizza box-size computers, storage devices, and network-routing machines are lined up in rows. Chilled air blows through the equipment from vents in the floors of “cold aisles.” Hot air blows out of the back ends into “hot aisles” and is drawn off and vented out of the building. Inside the centers, there’s a dull roar as large quantities of air shoot through ducts, vents, and computers.

So intense is the competition among tech companies to lower their costs of processing data that some treat information about their energy use like state secrets.
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The $4.5 billion spent in the U.S. in 2006 is the equivalent of the electric bills for 5.8 million U.S. households.

When you realize the huge cooling needs (in addition to the need for electricity to run the computers) you can see the huge advantage of a cold climate where you can take advantage of cool air for cooling.

2,000-year-old Seed to Bear Fruit in Three Years

2,000-year-old seed set to bear fruit in three years

Having been germinated, astoundingly, by an Israeli team more than three years ago, and kept alive since, the “Judean date” sapling appears likely (but not certain) to yield a now-extinct species of date that was renowned in ancient times as a treatment for heart disease, chest problems, the spitting of blood, weakened memory and other medical conditions, possibly even symptoms of cancer and depression.

The seed was discovered during the 1960s archaeological excavations of Masada by Prof. Yigael Yadin, an eminent Israeli archeologist, political leader and the second IDF chief of General Staff.

The Judean Dead Sea region was famous for its extensive and high-quality date culturing in the first century CE. High summer temperatures and low precipitation at Masada contributed to the seed’s exceptional longevity.

Cloak of Silence

Experts unveil ‘cloak of silence’

“The mathematics behind cloaking has been known for several years,” said Professor John Pendry of Imperial College London, UK, an expert in cloaking. “What hasn’t been available for sound is the sort of materials you need to build a cloak out of.”
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The Spanish team who conducted the new work believe the key to a practical device are so-called “sonic crystals”. These artificial composites – also known as “meta-materials” – can be engineered to produce specific acoustical effects.
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The research builds on work by scientists from Duke University in North Carolina, US, and the Hong Kong University of Science and Technology. Earlier this year, independent teams from the two institutions demonstrated the mathematics necessary to create an acoustic cloak. Other scientists have shown that objects can be cloaked from electromagnetic radiation, such as microwaves.

Retooling Theory and Practice

“Education in the composites industry is haphazard at best,” admits Gregor Welpton, president of Black Feather Boats (Douglas, Alaska). Although a number of training programs for both engineers and technicians have been spawned over the years, they are essentially independent and, therefore, largely unrelated efforts. The product of universities, community colleges, regional training centers, technical institutes, private training companies and composites vendors, these offerings run a wide gamut from undergraduate and advanced degrees and technical certifications to short courses and periodic seminars. A variety of teaching methods are employed by these programs, including classroom instruction and/or video-based training, video-interactive training and, least likely, hands-on lab work.

“Currently, composites education is being driven by the individual institution,” explains Andre Cocquyt, president of GRPGuru (Brunswick, Maine) and one of the architects of a new composites training curriculum being developed in Brunswick. “There is no consistent approach, no consistent level of education, no qualification,” he adds. The unintended consequence is a dramatic variation in the competency levels of program graduates.

Speaking for many industry business owners, Welpton says the time has come for a coordinated industrywide education effort: “The industry needs an education initiative,” he says, “so that the employers know what they’re getting out of the institutions and the employees know what is expected of them when they show up to work.”

Buckminster Fuller: Dymaxion Man

Dymaxion Man

Fuller’s schemes often had the hallucinatory quality associated with science fiction (or mental hospitals). It concerned him not in the least that things had always been done a certain way in the past. In addition to flying cars, he imagined mass-produced bathrooms that could be installed like refrigerators; underwater settlements that would be restocked by submarine; and floating communities that, along with all their inhabitants, would hover among the clouds. Most famously, he dreamed up the geodesic dome. “If you are in a shipwreck and all the boats are gone, a piano top . . . that comes along makes a fortuitous life preserver,” Fuller once wrote. “But this is not to say that the best way to design a life preserver is in the form of a piano top. I think that we are clinging to a great many piano tops in accepting yesterday’s fortuitous contrivings.” Fuller may have spent his life inventing things, but he claimed that he was not particularly interested in inventions. He called himself a “comprehensive, anticipatory design scientist—”a “comprehensivist,” for short—and believed that his task was to innovate in such a way as to benefit the greatest number of people using the least amount of resources. “My objective was humanity’s comprehensive success in the universe” is how he once put it. “I could have ended up with a pair of flying slippers.”

Related: Buckminster Fuller $100,000 Challenge – Golden Buckyballs – Everything I Know, the historic 42-hour session with Buckminster Fuller