Gold Stained Glass Windows An Early Air Purifier 0

Gold Stained Glass Windows An Early Air Purifier

Associate Professor Zhu Huai Yong, from Queensland University of Technology’s School of Physical and Chemical Sciences, said that church windows stained with gold paint purify the air when they are lit up by sunlight.

Scientists have discovered that, in medieval churches, stained glass windows painted with gold purify the air when heated by the sun. The researchers hope that this discovery could also be used for modern technologies, since the chemical reaction involved is very energy-efficient.

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Nanobacteria – Are They Alive? 0

Tiny particles called nanobacteria have intrigued researchers in many ways since their discovery 20 years ago, but perhaps the most controversial question they pose is whether or not they are alive. One thing about nanobacteria that’s clear is that they’re very widespread, occurring in practically all human material tested.

Toxin Free Gold Nanoparticles 0

Toxin Free Gold Nanoparticles

Researchers from the University of Missouri have made a major contribution to the field of medicine and the use of gold nanoparticles to treat everything from arthritis to cancer and in new modes of medical imaging — not to mention the dozens of other fields that utilize gold nanoparticles in processes and/or products.

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Tiny Handlike Gripper Could Make It Easier For Doctors 0

Tiny Handlike Gripper Could Make It Easier For Doctors

A tiny gripper that responds to chemical triggers could be a new tool for surgery.

A tiny handlike gripper that can grasp tissue or cell samples could make it easier for doctors to perform minimally invasive surgery, such as biopsies. The tiny device curls its “fingers” around an object when triggered chemically, and it can be moved around remotely with a magnet.

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Safeguard on nanotechnology 0

Congress must fund safety research for this atom-manipulating industry. Nanotechnology is producing exciting products, with one estimate that 15 percent of goods worldwide will involve such molecular engineering by 2014. But that won’t come easily if its pioneers don’t first address safety concerns.

Report Offers a Bird’s Eye View on Nanotechnology 0

Report Offers a Bird’s Eye View on Nanotechnology

Nanotechnology is a relatively new sector, and future growth is dependent largely on growing government support and heavy investments in R+D initiatives. Nanotechnology plays a central role is the development of desktop manufacturing, cellular repair, artificial intelligence, inexpensive space travel, clean + abundant energy, and environmental restoration. Global nanotechnology market is increasingly witnessing a move towards consolidation, as players reorient strategies and realign their businesses to better reflect the changing competitive dynamics, and remain viable and competitive in the maturing market. (Pics)

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Zooming into Concrete 0

http://www.youtube.com/watch?v=UUcQSw7oO0k

Total geek view of concrete

This video takes you on a journey into the atomic composition of one of the most common man made substances in the world - concrete. Second video after the jump.

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Flexible Solar Panels 4

A company has just come up with a way to produce cheap, flexible solar panels. The Nanosolar Company in San Jose, California, has developed a method for printing solar cells onto aluminum foil.

nano_ng.JPG

Flexible solar panel printed onto aluminum foil (Photo from Nanosolar).

While many companies have focused on making more efficient solar panels, Nanosolar has instead focused on making the panels cheaper to produce. The company is able to profitably sell solar panels for less than $1 a watt, the price at which solar energy becomes less expensive than coal.

This type of technology could someday become so common place in Maine that people don’t even look twice at it (how many times have you looked at a power line?).

For more information about this technology and to see the panels in operation, click on the video below:

Security Matters: Memo to Next President — How to Get Cybersecurity Right 0

Obama has a cybersecurity plan.

It’s basically what you would expect: Appoint a national cybersecurity adviser, invest in math and science education, establish standards for critical infrastructure, spend money on enforcement, establish national standards for securing personal data and data-breach disclosure, and work with industry and academia to develop a bunch of needed technologies.

I could comment on the plan, but with security, the devil is always in the details — and, of course, at this point there are few details. But since he brought up the topic — McCain supposedly is “working on the issues” as well — I have three pieces of policy advice for the next president, whoever he is. They’re too detailed for campaign speeches or even position papers, but they’re essential for improving information security in our society. Actually, they apply to national security in general. And they’re things only government can do.

One, use your immense buying power to improve the security of commercial products and services. One property of technological products is that most of the cost is in the development of the product rather than the production. Think software: The first copy costs millions, but the second copy is free.

You have to secure your own government networks, military and civilian. You have to buy computers for all your government employees. Consolidate those contracts, and start putting explicit security requirements into the RFPs. You have the buying power to get your vendors to make serious security improvements in the products and services they sell to the government, and then we all benefit because they’ll include those improvements in the same products and services they sell to the rest of us. We’re all safer if information technology is more secure, even though the bad guys can use it, too.

Two, legislate results and not methodologies. There are a lot of areas in security where you need to pass laws, where the security externalities are such that the market fails to provide adequate security. For example, software companies who sell insecure products are exploiting an externality just as much as chemical plants that dump waste into the river. But a bad law is worse than no law. A law requiring companies to secure personal data is good; a law specifying what technologies they should use to do so is not. Mandating software liabilities for software failures is good; detailing how is not. Legislate for the results you want and implement the appropriate penalties; let the market figure out how — that’s what markets are good at.

Three, broadly invest in research. Basic research is risky; it doesn’t always pay off. That’s why companies have stopped funding it. Bell Labs is gone because nobody could afford it after the AT&T breakup, but the root cause was a desire for higher efficiency and short-term profitability — not unreasonable in an unregulated business. Government research can be used to balance that by funding long-term research.

Spread those research dollars wide. Lately, most research money has been redirected through Darpa to near-term military-related projects; that’s not good. Keep the earmark-happy Congress from dictating (.pdf) how the money is spent. Let the NSF, NIH and other funding agencies decide how to spend the money and don’t try to micromanage. Give the national laboratories lots of freedom, too. Yes, some research will sound silly to a layman. But you can’t predict what will be useful for what, and if funding is really peer-reviewed, the average results will be much better. Compared with corporate tax breaks and other subsidies, this is chump change.

If our research capability is to remain vibrant, we need more science and math students with decent elementary and high school preparation. The declining interest is partly from the perception that scientists don’t get rich like lawyers and dentists and stockbrokers, but also because science isn’t valued in a country full of creationists. One way the president can help is by trusting scientific advisers and not overruling them for political reasons.

Oh, and get rid of those post-9/11 restrictions on student visas that are causing (.pdf) so many top students to do their graduate work in Canada, Europe and Asia instead of in the United States. Those restrictions will hurt us (.pdf) immensely in the long run.

Those are the three big ones; the rest is in the details. And it’s the details that matter. There are lots of serious issues that you’re going to have to tackle: data privacy, data sharing, data mining, government eavesdropping, government databases, use of Social Security numbers as identifiers, and so on. It’s not enough to get the broad policy goals right. You can have good intentions and enact a good law, and have the whole thing completely gutted by two sentences sneaked in during rulemaking by some lobbyist.

Security is both subtle and complex, and — unfortunately — it doesn’t readily lend itself to normal legislative processes. You’re used to finding consensus, but security by consensus rarely works. On the internet, security standards are much worse when they’re developed by a consensus body, and much better when someone just does them. This doesn’t always work — a lot of crap security has come from companies that have “just done it” — but nothing but mediocre standards come from consensus bodies. The point is that you won’t get good security without pissing someone off: The information-broker industry, the voting-machine industry, the telcos. The normal legislative process makes it hard to get security right, which is why I don’t have much optimism about what you can get done.

And if you’re going to appoint a cybersecurity czar, you have to give him actual budgetary authority — otherwise he won’t be able to get anything done, either.

Bruce Schneier is chief security technology officer of BT, and author of Beyond Fear: Thinking Sensibly About Security in an Uncertain World.




Source:Security Matters: Memo to Next President — How to Get Cybersecurity Right

Tags: bad guys, campaign speeches, critical infrastructure, cybersecurity plan, externalities, government employees, government networks, information security, math and science, mccain, personal data, policy advice, position papers, rfps, science education, security improvements, security requirements, serious security, tech, tech biz, technological products, technology around the world, three pieces, world tech

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Insertion Sort Explained 0

Basic Idea: You have a deck of unsorted cards. Lets start a sorted pile. So you take one card at a time from unsorted pile and appropriately place it in sorted pile. You keep doing it until you just left with a sorted pile.

OK, now lets break it down in high-level pseudo code. Lets assume we’re talking about arrays as a data structure.

Function InsertionSort (A):

    n = number of elements in A

    for i=1 to n-1:

    for (j=i; j>0 && x[j-1] > x[j]; j–)

    swap (x, j-1, j)

OK, that was some dense code :) It also happens to be one very bad-ass implementation of it. Lets break go through it and see whats going …

So, the outter loop:

    walk from i=1 to n-1

is going to walk left to right and leave everything before i sorted, but everything it hasn’t touched yet unsorted. (you’ll see in a second why we’re starting with 1 instead of 0)

    sorted pile

    i

    unsorted pile

The inner loop:

    for (j=i; j>0 && x[j-1] > x[j]; j–)

    swap (x, j-1, j)

is going to try to stick the new element into appropriate place in the “sorted” pile. The key thing to notice here is it walks right to left.

Now Visualize the inner loop:

  • we have a sorted pile, with new element being at the very right of it.
  • if the element to the left of it is bigger then our new element, we’ll swap them
  • we’ll keep looking and seeing if the element to the left of us is smaller and swapping positions until there is nothing left.

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