Forgot your password?
typodupeerror
Power

CFLs Causing Utility Woes 859

dacut writes "We've seen compact fluorescent lamps start to take over shelf space at the local hardware store. Replacing a 60 watt incandescent with a 13 watt CFL seems like a great savings, though many consumers are disappointed with the slow warm-up times, lower-than-advertised lifetimes, and hassles of disposing the mercury-containing bulbs. Now EDN reports they may use more energy than claimed due to their poor power factor. Mike Grather, of Lumenaire Testing Laboratory, 'checked the power factor for the CFLs and found they ranged from .45 to .50. Their "real" load was about twice that implied by their wattage.' The good news: you're only billed for the 13 watts of real power used. The bad news: the utilities have to generate the equivalent of 28 watts (that is, 28 VA of apparent power for you EEs out there) to light that bulb. Until they fix these issues, I'll hold on to my incandescents and carbon arc lamps, thanks."
Data Storage

Apps That Rely On Ext3's Commit Interval May Lose Data In Ext4 830

cooper writes "Heise Open posted news about a bug report for the upcoming Ubuntu 9.04 (Jaunty Jackalope) which describes a massive data loss problem when using Ext4 (German version): A crash occurring shortly after the KDE 4 desktop files had been loaded results in the loss of all of the data that had been created, including many KDE configuration files." The article mentions that similar losses can come from some other modern filesystems, too. Update: 03/11 21:30 GMT by T : Headline clarified to dispel the impression that this was a fault in Ext4.
Music

Young People Prefer "Sizzle Sounds" of MP3 Format 743

Hugh Pickens writes "Jonathan Berger, a professor of music at Stanford, tests his incoming students each year by having them listen to a variety of recordings which use different formats from MP3 to ones of much higher quality, and he reports that each year the preference for music in MP3 format rises. Berger says that young people seemed to prefer 'sizzle sounds' that MP3s bring to music because it is a sound they are familiar with. 'The music examples included both orchestral, jazz and rock music. When I first did this I was expecting to hear preferences for uncompressed audio and expecting to see MP3 (at 128, 160 and 192 bit rates) well below other methods (including a proprietary wavelet-based approach and AAC),' writes Berger. 'To my surprise, in the rock examples the MP3 at 128 was preferred. I repeated the experiment over 6 years and found the preference for MP3 — particularly in music with high energy (cymbal crashes, brass hits, etc) rising over time.' Dale Dougherty writes that the context of the music changes our perception of the sound, particularly when it's so obviously and immediately shared by others. 'All that sizzle is a cultural artifact and a tie that binds us. It's mostly invisible to us but it is something future generations looking back might find curious because these preferences won't be obvious to them.'"
Earth

Why Sustainable Power Is Unsustainable 1108

Urchin writes "Although scientists are agreed that we must cut carbon emissions from transport and electricity generation to prevent the globe's climate becoming hotter, the most advanced 'renewable' technologies are too often based upon non-renewable resources including indium and platinum — resources that could dry up in 10-15 years if they were widely used in the renewable energy market."
Image

Using Drupal 122

Michael J. Ross writes "After installing and learning the basics of the content management system Drupal, many Web developers do not know how to best proceed from there. They may realize that much of the programming potential of Drupal — and thus the earning potential of Drupal developers — is derived from the use of community-contributed modules that greatly extend Drupal's power. But there are thousands of such modules, with no objective direction as to which ones are best suited for particular tasks, and what bugs and other flaws could trip up the developer. These programmers need a thorough guide as to which modules are the most promising for the development of the most common types of Web sites. A new book, Using Drupal, aims to fill this need." Keep reading for the rest of Michael's review.
Books

A Look Back At Kurzweil's Predictions For 2009 307

marciot writes "It's interesting to look back at Ray Kurzweil's predictions for 2009 from a decade ago. He was dead on in predicting the ubiquity of portable computers, wireless, the emergence of digital objects, and the rise of privacy concerns. He was a little optimistic in certain areas, predicting the demise of rotating storage and the ubiquity of digital paper a bit earlier than it appears it will actually happen. On the topic of human-computer speech interfaces, though, he seems to be way off." And of course Kurzweil missed 9/11 and the fallout from that. His predictions might have been nearer the mark absent the war on terror.
Earth

Is the Yellowstone Supervolcano About To Blow? 877

An anonymous reader writes "Apparently, Yellowstone National Park has been having a very unusual number of earthquakes. Many of the most recent tremors have been deeper underground, an ominous sign. Combine that with a rapid rise in elevation over the past three years, and the possibility that earthquake activity from surrounding areas could trigger such an eruption on its own, and you've got the possible warning signs of a supervolcano eruption that would wipe out half to 2/3 of the continental US, plunge global temperatures, and wipe out a very significant chunk of world food sources. Here's a little more info to make your New Year brighter!"
Bug

Microsoft Zunes Committing Mass Suicide 785

jddeluxe writes "There are multiple reports springing up all over the internet of a mass suicide of Microsoft 30GB Zune players globally. Check Zune forums, Gizmodo, or other such sites; the reports are spreading rapidly, except apparently to the Microsoft official Zune site."
Editorial

Proprietary Blobs and the Pursuit of a Free Kernel 405

jammag writes "Ever since the GNewSense team pointed out that the Linux kernel contains proprietary firmware blobs, the question of whether a given distro is truly free software has gotten messier, notes Linux pundit Bruce Byfield. The FSF changed the definition of a free distribution, and a search for how to respond to this new definition is now well underway. Who wins and what solutions are implemented could have a major effect on the future of free and open source software. Debian has its own solution (by allowing users to choose their download), as do Ubuntu and Fedora (they include the offending firmware by default but make it possible to remove it). Meanwhile, the debate over firmware rages on. What resolves this issue?"
Science

Science's Alternative To an Intelligent Creator 683

Hugh Pickens writes "Discover magazine has an interesting article on the multiverse theory — a synthesis of string theory and the anthropic principle that explains why our universe seems perfectly tailored for life without invoking an intelligent creator. Our universe may be but one of perhaps infinitely many universes in an inconceivably vast multiverse. While most of those universes are barren, some, like ours, have conditions suitable for life. The idea that the universe was made just for us — known as the anthropic principle — debuted in 1973 when Brandon Carter proposed that a purely random assortment of laws would have left the universe dead and dark, and that life limits the values that physical constants can have. The anthropic principle languished on the fringes of science for years, but in 2000, new theoretical work threatened to unravel string theory when researchers calculated that the basic equations of string theory have an astronomical number of different possible solutions, perhaps as many as 101,000, with each solution representing a unique way to describe the universe. The latest iteration of string theory provides a natural explanation for the anthropic principle. If there are vast numbers of other universes, all with different properties, at least one of them ought to have the right combination of conditions to bring forth stars, planets, and living things." So far xkcd is simulating just one single universe.
PHP

PHP Gets Namespace Separators, With a Twist 523

jeevesbond writes "PHP is finally getting support for namespaces. However, after a couple hours of conversation, the developers picked '\' as the separator, instead of the more popular '::'. Fredrik Holmström points out some problems with this approach. The criteria for selection were ease of typing and parsing, how hard it was to make a typo, IDE compatibility, and the number of characters."
Government

Linux As a Model For a New Government? 509

An anonymous reader writes "The hedge fund investor who prided himself on achieving 1000% returns, Andrew Lahde, wrote a goodbye letter to mark his departure from the financial world. In it, he suggests people think about building a new government model, and his suggestion is to have someone like George Soros fund a new government that brings together the best and brightest minds in a manner where they're not tempted by bribery. In doing so, he refers to how Linux grows and competes with Microsoft. An open source government. How would such a system work, and could it succeed? How long before it became corrupt? Would it need a benevolent dictator (Linus vs. Soros)?"
Earth

Environmental Cost of Hybrids' Battery Recycling? 520

LostMyBeaver writes "I have been considering the purchase of an electric or hybrid vehicle for some time. The biggest problem I have currently is that both technologies make use of rechargable batteries. The same tree-huggers telling me gasoline is bad are telling me that batteries are bad too. I'm only partially knowledgable in this area, but it appears the battery technologies are generally based at least on lithium ion, nickel metal hydride, lead acid and nickel-cadmium. I was hoping someone on Slashdot would be knowledgable enough to explain the environmental cost of recycling these batteries. If I understand correctly, after these chemicals are 'spent' so the cells no longer maintain a charge, they are not useful for producing new batteries. I can only imagine that the most common method of recycling the cells is to store the toxic chemicals of the batteries in barrels and refilling the cells with new chemicals. This sounds like an environmental disaster to me. Is there someone here that can help me sleep better at night by explaining what really happens?"
The Internet

Chrome Vs. IE 8 771

snydeq writes "Google Chrome and Internet Explorer 8 herald a new, resource-intensive era in Web browsing, one sure to shift our conception of acceptable minimum system requirements, InfoWorld's Randall Kennedy concludes in his head-to-head comparison of the recently announced multi-process, tabbed browsers. Whereas single-process browsers such as Firefox aim for lean, efficient browsing experiences, Chrome and IE 8 are all about delivering a robust platform for reliably running multiple Web apps in a tabbed format in answer to the Web's evolving needs. To do this, Chrome takes a 'purist' approach, launching multiple, discrete processes to isolate and protect each tab's contents. IE 8, on the other hand, goes hybrid, creating multiple instances of the iexplore.exe process without specifically assigning each tab to its own instance. 'Google's purist approach will ultimately prove more robust,' Kennedy argues, 'but at a cost in terms of resource consumption.' At what cost? Kennedy's comparison found Chrome 'out-bloated' IE 8, consuming an average of 267MB vs. IE 8's 211MB. This, and recent indications that IE 8 itself consumes more resources than XP, surely announce a new, very demanding era in Web-centric computing."
Data Storage

Digital Storage To Survive a 25-Year Dirt Nap? 1044

AlHunt writes "I've been tasked with finding a way to bury digitally stored photographs in a small underground time capsule to be opened in 25 years. It looks like we'll be using a steel vessel, welded closed. I've thought of CDs, DVDs, a hard drive, or a thumb drive — but they all have drawbacks, not the least of which is outdated technology 25 years from now. Maybe I'll put a CD and a CD-ROM drive in the capsule and hope that the IDE interface is still around in 25 years? Ideas and feedback will be appreciated."

Slashdot Top Deals

There is very little future in being right when your boss is wrong.

Working...