Follow Slashdot blog updates by subscribing to our blog RSS feed

 



Forgot your password?
typodupeerror
×

Comment Nonsense (Score 5, Informative) 510

I already block Flash automatically, as it drags down performance and rarely adds any content.

There are a few cases in which useful content has been designed in Flash, but most of the time it is useless eye candy - and more often than not, just pure advertising. A great way to block most advertising that you do not want is to block Flash. Why would you not want to do that?

Power

Creating Electric Power From Light Using Gold Nanoparticles 77

cyberfringe writes "Professor of Materials Science Dawn Bonnell and colleagues at the University of Pennsylvania have discovered a way to turn optical radiation into electrical current that could lead to self-powering molecular circuits and efficient data storage. They create surface plasmons that ride the surface of gold nanoparticles on a glass substrate. Surface plasmons were found to increase the efficiency of current production by a factor of four to 20, and with many independent parameters to optimize, enhancement factors could reach into the thousands. 'If the efficiency of the system could be scaled up without any additional, unforeseen limitations, we could conceivably manufacture a 1A, 1V sample the diameter of a human hair and an inch long,' Prof. Bonnell explained. The academic paper was published in the current issue of ACS Nano. (Abstract available for free.) The significance? This may allow the creation of nano-sized circuits that can power themselves through sunlight (or another directed light source). Delivery of power to nanodevices is one of the big challenges in the field."

Submission + - Dinosaur Feather Color Discovered (scienceblogs.com) 1

anzha writes: Do you remember being a kid and told we'd never know what colors the dinosaurs were? For at least some, that's no longer true. Scientists working in the UK and China have closely examined the fossils of multiple theropods and actually found the colors and patterns that were present in the fossilized proto-feathers. So far, the answer is orange, black and white in banded and other patterns. The work also thoroughly thrashes the idea that fossils might not be feathers, but collagen fibers instead. If this holds up, Birds Are Dinosaurs. Period. And colorful!

Comment Re:Linux essential and present for science (Score 1) 835

If you read the post a bit more slowly and carefully, it may become clearer that the latter part of the is about scientific computing in general.

As it happens, I work in a high performance computing center and use Linux all of the time. Beyond that, Macs account for about half of the personal desktops or laptops used here, with Windows and Linux also represented. What I like best about my OS X laptop is that I can do essentially anything I need to do from it, through it, or via scripts that share between the two.

That having been said, I agree with you that Linux dominates the bulk-computing environments found within high performance computing, despite serious attempts on the part of Microsoft to get traction into this space. To first order, scientific computing IS Linux, with personal machine environments connecting to these systems left to personal choice.

My point remains that Linux is essential for science and that someone going into science will surely be exposed to it and trained in its use. My personal choice for an individual laptop and desktop environment is OS X, and I note that a larger fraction of scientists make this choice than in other fields, as well.

Comment Linux essential and present for science (Score 1) 835

Almost all high performance computing environments, as well as a great deal of scientific computing in general, is handled on Unix platforms, almost all of which are Linux or Mac OS X. If your daughter is interested in a career in science, she is sure to encounter Linux as part of her education in the sciences.

Cellphones

The Irksome Cellphone Industry 272

gollum123 writes "David Pogue of the NYTimes wonders why Congress is worrying about exclusive handset contracts when there are more significant things that are broken, unfair, and anti-competitive in the American cellphone industry. He lists text messaging fees, double billing, handset subsidies, international call rates, and 'airtime-eating instructions' among the major problems not being addressed by Congress. 'Right now, the cell carriers spend about $6 billion a year on advertising. Why doesn't it occur to them that they'd attract a heck of a lot more customers by making them happy instead of miserable? By being less greedy and obnoxious? By doing what every other industry does: try to please customers instead of entrap and bilk them? But no. Apparently, persuading cell carriers to treat their customers decently would take an act of Congress.'"

Comment Re:My Job. (Score 2, Informative) 186

I also do extensive technical support for a not-for-profit. We recently switched most of our communication including mail, documents, calendar, and other communications and a significant part of our web presence to the Google Apps for Domain suite. We are really happy with this solution and are saving a ton of money. As a 501(c)(3), we are eligible for and have received this at no cost.

In terms of CRM, we see that Salesforce has what appears to be extremely good integration with Google Apps. We haven't tried this yet, and are somewhat concerned about costs, but may go that direction also as our usage of the Google Apps suite matures.

By the way, the new scripting tools for spreadsheets recently announced for early trial look very good, and may replace any need we have for other products.

Space

Pulsar Signals Could Provide Galactic GPS 146

KentuckyFC writes "We're all familiar with GPS. It consists of a network of satellites that each broadcast a time signal. A receiver on Earth can then work out its position in three-dimensional space by comparing the arrival times of the signals from at least three satellites. That's handy, but it only works on Earth. Now astronomers say that the millisecond signals from a network of pulsars could allow GPS-style navigation on a galactic scale. They propose using four pulsars that form a rough tetrahedron with the Solar System at its center, and a co-ordinate system with its origin at 00:00 on 1 January 2001 at the focal point of the Interplanetary Scintillation Array, the radio telescope near Cambridge in the UK that first observed pulsars. The additional complexity of working with signals over these distances is that relativity has to be taken into account (which is why the origin is defined as a point in space-time rather than just space). The pulsar GPS system should allow users to determine their position in space-time anywhere in the galaxy to within a few nanoseconds, which corresponds to an accuracy of about a meter." Pulsars slow down over time, and the arXiv paper doesn't seem to mention this. The paper is mainly about establishing a coordinate system and a reference selection of pulsars. Any proposed Galactic Positioning System would have to take the slowing into account, and since it is poorly understood and not completely predictable, this would limit accuracy.

Comment Definitely Mac if you want to get any work done (Score 2, Informative) 229

Let me get this straight - you'll be traveling all over the world, exposed to who knows what networking and virus-prone environments, and don't already know that the Mac is your best starting point?

A Macbook Pro for anyone doing real work (viewing dailies, making storyboard or layout suggestions, doing any ancillary work actually associated with the film); smaller Macbooks for carrying around the set to do story work, check e-mail, etc., and a few minis should give you everything you need in the field. ANyone who needs to run another OS can do it via Parallels or VMWare, etc. (even VirtualBox for free if you want to). Film and Macs go together and this will produce the most comfortable, secure and performant working environment. (Plus, people will actually LIKE their machines and using them!)

f you want to spend your time debugging viruses picked up from hotel networks and doing IT support for obscure Windows problems while you should be working, that of course is your business...

Slashdot Top Deals

Understanding is always the understanding of a smaller problem in relation to a bigger problem. -- P.D. Ouspensky

Working...