Science Category Archive

Advances in Computer Cooling Systems

3 Replies Jonny Hankins

A few months ago I wrote an article about electricity use in data storage centres, and I want to continue on that theme today. This week Intel announced the results of a year long experiment that involves immersing computers in mineral oil to cool them.

It turns out that the reason these centres use so much electricity is the need to cool the machinery. As this article points out some companies have had the brilliant idea of building their facilities in cold places, so that they can just leave the doors open or use cold seawater to cool the plants, but obviously this does not suit all business plans.

Intel have been immersing their machinery in mineral oil in an attempt to save on electricity. Oil is a better conductor of heat than air so works more efficiently. You just have to remove the fans from the casings and drop the machines in. At the end of this 1 year experiment they found no problems in the machinery due to the immersion. Report in the article linked above.

Computers submerged in mineral oil which acts as a cooling agent

Intel’s experimental oil cooling system

This certainly gives a whole new meaning to the idea of a think-tank.

An organization called Sandia have another idea called a fan-less heat sink. This is a rotating wheel covered in fins that cuts out the use of the fan. They claim that this system is also much more efficient than the old fan system and is not affected by dust as the centrifugal force generated during its use throws it all out. There is an article explaining it here and for a technical explanation see their company website.

If you want to go one step further how about laser cooling? Researchers at Nanyang Technological University have been working on this idea in the hope that they will be able to build microchips that actually cool themselves. Their press release talks about the end of compressors in fridges and air conditioners, a dramatic advantage in energy waste and an end to noisy fans. All published in this month’s Nature science journal.

If all of this has wet your appetite you could try to convert your old computer to a water cooling system. Rather expensive commercially available solutions are available but this blog demonstrates how you can do it all in your own home using just a few things you can buy at your local hardware store. I would recommend that you do not use the computer you are using now though and that you save anything you might want to see again onto another hard drive!

I take no responsibility for damage incurred.

The end of Anonymity?

1 Reply Jonny Hankins

Over recent years many people have had their DNA analysed and results posted online. The results have been anonymised, but the vast spread of information on the web calls into doubt the possibility of really making information untraceable.

Last week the Boston Globe ran a story reporting an article published in the journal Science, in which researchers demonstrate how they correctly identified individual identities of the owners of some of this DNA.

DNA

DNA, a personal business

Scientists at the Whitehead Institute for Biomedical Research wanted to identify the owners of anonymous DNA samples that are available for research purposes online. They did not have any high technology, using ancestor tracing websites and freely available public documents.

We are not talking about hackers or expensive programs, we are talking about people with every-day computers and the same understanding of how they work as you or I.

It took a single researcher with an Internet connection about three to seven hours per person, and all in all the identities of more than 50 participants were discovered.

This raises several issues. What about all of those people who gave materials for research who find themselves posted and traceable on the Internet? What obligations do commercial companies such as 23andMe have towards their customers, operating in a more or less unregulated environment? (see here for posts about their organization). Can there be real guarantees of anonymity in modern life? Given the obvious advantages of data gathering how can it better be shared in order to protect individual owners?

The very scientists who conducted the research argue that the privacy problem needs to be completely re-analysed, with some scientists dubious that privacy to any extent can be guaranteed.

Problems related to this are both practical and philosophical. In the US the GINA legislation was set up to protect individuals from the effects of their DNA codes (and analysis of it) falling into the ‘wrong hands’. The wrong hands in this case are those of health insurance companies, that might not want to insure a person (or may want to charge more) because they have one particular gene mutation or another.

There are shortcomings however, the GINA legislation does not allow health insurance companies to discriminate on the basis of DNA testing, but other insurance companies are not legislated against. Life insurance and long term care insurance is not covered under the document, so in theory they would be free to decline cover on the basis of DNA analysis. This is particularly important as long term care is extremely expensive and is not covered through health insurance.

Given that anyone who has given their DNA for research purposes risks being identified, they may also risk discrimination.

Politics and the Environment

3 Replies Jonny Hankins

Yesterday the official data came out and the year 2012 was the hottest year the US has experienced since records began. Not only that, but it was the hottest by a long way.

The Hurricane Sandy experience, as well as a recent spate of wildfires and drought, has meant that the topic of climate change is firmly on the table, but the dissenting voice still carries political clout.

There are two polar positions here, with a large political lobby arguing that climate change has nothing to do with human actions, that either the Earth is warming naturally or that there is no proof that the world is warming at all. This goes against mainstream European thinking, and we can see many differences in approach between the two continents. In Europe we no longer use plastic bags on mass, they are now almost all biodegradable, and we can only buy low wattage compact fluorescent lamps as old style light bulbs have been fazed out.

Here the government is moving towards the same goal. In Massachusetts an organization called Mass Save subsidizes the cost of replacing old bulbs with new. The money comes from the user who has to pay a supplement on the electric bill to fund the scheme, but all is not without issue.

which do you favour?

A traditional and new style lamp

These bulbs contain mercury, a naturally occurring but poisonous substance. This means that they have to be disposed of properly, as if they are just dumped into the ground they can poison the surrounding water ways, very much in the same way as batteries do. They are also much more complex than old style bulbs, they require assembly and raw materials for their components, and much of this work is carried out in China with the usual questions of human rights and exploitation that are associated with this type of process.

Some sections of the political world (the Tea Party for example) offer this as proof that the environmentalists are poisoning the Earth and that their arguments are based upon false suppositions. Statistics are produced that seemingly show that a few lamps may do a lot of damage, but they do cut down electricity consumption enormously, and here in the US a lot of electricity is still produced by burning coal, and that is an extremely dirty and polluting affair.

The amount of mercury is also disputed, bringing poison into the house, light that burns skill, all kinds of terrifying scenarios, and I am certain that these lamps do present a real issue of environmental threat, but it is not through such scaremongering that progress will be made.

For the lamps to be efficient and effective they must be disposed of properly. For this to happen the public must be informed and take action. These bulbs must be correctly packaged when they fail and taken to recycling hubs where skilled operators know how to dismantle them.

As many readers might know, the environment and all issues surrounding its protection are extremely politicized in the US. Research data is difficult to come by, and large sums of money are involved, particularly on the side of the sceptics. But cuts in electricity use must be a good thing, but only if the collateral effects of such a mass introduction of ever cheaper technology that purports to be wholly good are properly investigated and managed.

Low mercury lights are available too, but I would like to say that the amount of mercury present in even a non low mercury version is extremely small. You have a lot more in the fillings in your teeth for example, but you should still go to the dentist for a check up every now and again.

In practical terms, I recently changed 12 bulbs in my house and my monthly electricity bill dropped by about 20%, good for me, good for the planet, but let’s not see it out of context. The keys are nothing more than management however, good research that is available to all, education on the pros and cons of different possible solutions, and less political manipulation.

Here are two takes on the story. A critique of the way these problems arise through big business funding of the sceptic argument and a critique of from the other side.

Both politically loaded as you will see.