2007年11月28日星期三
Google Has Energy For New Business
Intel Updates Compilers For 'Leopard'
Cyber Monday Sales Top $700 Million
2007年11月27日星期二
Motorcycle Gaskets
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Branded Clothing
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Silicon Label On Textile
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Buy Metal Zipper
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Buy High Post Bed Sewing Machine With Top And Bottom Roller Feed
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2007年11月26日星期一
IBM Adds .NET Interface To Java Server
Queen Bees Control Sex of Young After All
By Matt Kaplan
ScienceNOW Daily News
15 November 2007
Every young queen goes on a mating flight and then stores the sperm she collects from multiple matings for the rest of her life, using it up bit by bit as she lays eggs. Males, called drones, emerge from unfertilized eggs, and females emerge from fertilized ones and become the workers. So if the queen adds sperm to an egg, it will produce a female; if she withholds sperm, the egg will produce a male. That would appear to give the queen control over the sex of her offspring. However, the dogma among entomologists is that workers control the type of eggs the queen lays. The workers build the cavities, known as cells, in which the queen will lay her eggs. A queen will lay an unfertilized egg in a particular cell only if the cell is big enough to accommodate a male larva, which is bigger than a female one. So by controlling how many cells they build of each size, the workers can limit how many male offspring the queen produces.
Despite these constraints, the queen can still tip the gender balance of the hive, report Katie Wharton and a team of entomologists at Michigan State University in East Lansing. To prove it, they confined queens inside their hives in specially built cages. Each cage was placed so that the queen could not reach the large cells where she could lay drone eggs but only the small cells where she could lay worker eggs. After 4 days, the cage was removed and the queen allowed to roam free in the hive, which had ample empty cells of both sizes. The queen then sought out the larger cells and, on average, laid nearly three times as many drone eggs as usual, apparently making up for the skewed hive gender ratio that resulted from her incarceration, the researchers report in the November/December issue of Behavioural Ecology. "The workers and the queen clearly share control of honey bee demographics," Wharton says. "It was like discovering a checks-and-balances government inside the hive."
The queen's ability to make "her own decisions" adds a new layer of complexity to life in the hive and raises questions about what stimuli the queen is responding to, says Lars Chittka, an entomologist at Queen Mary University in London. "Is she remembering how many eggs she has laid, can she sense how much sperm she has used, or is there some sort of chemosensory cue telling her how many drone larvae are in the cells?" Chittka says. "Following this new research, it's anybody's guess."
2007年11月25日星期日
Shrewd Snake Savors Deadly Meal
By Elizabeth Quill
ScienceNOW Daily News
16 November 2007
The death adder stabs unsuspecting frogs with its fangs, injecting venom to kill its supper. The frogs have fought back, however, evolving various defenses--longer legs for bigger jumps or chemical substances that taste nasty and can kill. Ecologists Ben Phillips and Richard Shine, both of the University of Sydney, Australia, decided to study the snake's general feeding behavior. And when they did, they stumbled upon a strange twist in this evolutionary arms race.
The team dropped frogs of various species in the snakes' glass pens and kept a video camera rolling to record the action as the snakes captured their prey. The snakes gobbled up nontoxic frogs right after injecting them with venom, but they took more time with two other species, the researchers report in the December issue of The American Naturalist. The snake waited 10 minutes before munching on the marbled frog, which produces a gluelike substance on its skin when irritated. (Mouth full of goo? No, thank you!) Further studies revealed that the gunk loses its stickiness after 10 minutes. The snakes waited even longer--40 minutes--before eating the deadly Dahl's aquatic frog. Shine says that by letting the frogs' chemical defenses break down, the snakes have found an unbeatable strategy. "Any predator eating prey whose defenses will terminate after death can simply wait around," Shine says.
The results reveal an unusual adaptation on the part of the snakes, says Wolfgang W%26uuml;ster, a zoologist at Bangor University in the U.K. He says the frogs may find another strategy to continue the evolutionary battle: "It is hard to say, however, how it would happen easily."
2007年11月23日星期五
Sell automatic queue management system
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Sell commerce Service
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Sell Water Testing Services
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Sell Aluminum Scutcheon
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2007年11月22日星期四
Stocks End Up On Volatile Day
Google-DoubleClick Privacy Concerns Prompt Senate Protest
IBM Adds .NET Interface To Java Server
2007年11月10日星期六
Buy Guatemalan Cardamom Of All Grades
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2007年11月9日星期五
Sell Children's Jacket
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Speaker Cables
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Sell Drill Feed
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Sell Raw and Processed Materials
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Microsoft Polishes Live Services
2007年11月8日星期四
Vonage, AT&T Settle Patent Suit
Microsoft-Novell: Has Their Deal Made a Difference?
2007年11月6日星期二
Stocks Climb Ahead of Cisco's Results
Microsoft Fires Its CIO
2007年11月2日星期五
Barbarians At The Mac's Shaky Gates
Sell 1-ton high efficiency drawbench
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Sell Coder B-TY2
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Sell Sandwich mount/Shear mount /levelers/insulator/Slack adjusters/snubber/feet
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Sell CNC Milling Parts
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IronMountainSnaresStratify
GoogleGadgetsGoIntoTheWild
SIIAGunningForOnlineSoftwarePirates
2007年11月1日星期四
Everex PC Goes Linux, Low-Cost
PC maker Everex has announced a low-cost Linux PC for the masses that it hopes will succeed where others have failed. The $198 price tag might help.
The Everex gPC will hit Wal-Mart shelves tomorrow and is designed to attract new PC users. Running on Ubuntu Linux 7.1, the gPC is a mini-tower system that comes with a Via C7-D low-power x86 clone running at 1.5Ghz but drawing only two watts of power. Under full load, the PC requires only 20 watts of power, a tenth of what most PCs use. The machine also comes with 512MB of memory, an 80GB hard drive and a CD-RW recorder.
"If you look at it by Vista standards, it seems bottom of the barrel," said Paul Kim, director of marketing for Everex. "But running in the Linux environment -- it's pretty powerful."
gPC
The gPC's user interface called Enlightenment, which replaces the more comprehensive Compiz Fusion UI -- a standard in Ubuntu Linux. Enlightenment's developer, gOS, is behind the gPC's OS, also called gOS.
The gOS has a distinctly Mac OS-like look to it, which isn't too surprising as gOS founder David Liu is a Mac fan, but there were some things he didn't like about it. "On the developer side it's closed, and on the end-user side it's not affordable. So we wanted something inspired by Mac OS in look and feel and ease of use but centered around the Google apps family," he told InternetNews.com.
The gPC comes loaded with Google's suite of applications, such as Gmail, Google Docs %26 Spreadsheets, Google Calendar, Google Product Search, Google Blogger, YouTube, Google Maps, and Google News. Other free apps include Meebo for instant messaging, GIMP for image editing, Firefox, Xing Movie Player, RhythmBox, an iTunes substitute, Facebook, Skype and OpenOffice.org 2.2.
"In the Linux community, your standard distribution may or may not have all the apps you need, and most Linux people are savvy enough to go online and get what they need. We recognize most users are not savvy enough to get all that stuff and install it," said Liu.
There have been previous attempts at low-cost Linux PCs for the masses, such as Linspire, but they failed to make a sizable dent in the market (although Linspire was hamstrung by a protracted legal fight with Microsoft that had nothing to do with the product).
Liu thinks gPC can succeed by making the system easy for beginner or inexperienced PC users.
"Our target is first-time users and someone who wanted a simple experience," he said. Everex tried to anticipate as much consumer need as possible in loading all of the free software on the computer. "There is some value to integration. We want the out-of-box experience to be as seamless as possible.
Kim added that while the Google name and logo are used, this is not a Google-endorsed product. While it's full of Google apps, the goal of both companies was to create an out-of-the-box Web 2.0 experience, he said.
Whether the gPC will have luck in Wal-Mart when other efforts have failed remains to be seen. IDC analyst Richard Shim isn't so sure about the U.S. market but said overseas presents a better opportunity. "In this market there are already established players and they are likely to move into that space as the market becomes more commoditized," he told InternetNews.com.
For instance, Dell, a much bigger player than Everex, is also in Wal-Mart with a $359 computer that has sold well. Shim said Everex is better off looking in other markets than competing against Dell.
"If you go somewhere with lower penetration rates, there's more opportunity, both from lower expectations from the customers and from a lower market penetration standpoint."
Privacy Groups Seek 'Do Not Call' List for Web Ads
Consumer privacy groups are pushing for increased regulatory oversight of online advertising, including a "Do Not Track" registry that would ban companies from tracking online users and targeting ads based on their activities.
The groups, which include the Center for Democracy and Technology, the Electronic Frontier Foundation and Consumer Action, sent a proposal to the Federal Trade Commission (FTC) asking for it to oversee a mandatory "Do Not Track" registry.
The registry would loosely follow the model of the successful national and state "Do Not Call" registries that prevent telemarketers from making unsolicited sales pitches to consumers who have signed.
The online advertising industry, however, has long claimed that targeted ads are more relevant to consumers, and thus more useful and interesting to them.
In their petition to the FTC, the groups also said they want online advertisers to instantly reveal to Web users the specifics of the information they are tracking.
"The online tracking and targeting of consumers ... needs to be limited so that consumers can exercise meaningful, granular preferences based on timely and contextual disclosures that are understandable on whichever devices consumers choose to use," the groups wrote in their proposal to the FTC. "Specifically, we urge the U.S. Federal Trade Commission to take proactive steps to adequately protect consumers as online behavioral tracking and targeting become more ubiquitous."
The groups' proposal comes as AOL, one of the largest players in online media, is undertaking efforts to address a glitch in how its Web sites handle consumer requests to opt-out of receiving marketing messages.
The online media giant today announced an improvement to its opt-out system, which better protects customers from being mistakenly solicited by the company's Web sites if they've asked to no longer receive marketing messages.
Typically, if a user decides not to accept getting messages or ads from one Web site, that preference is noted in a Web browser cookie. However, under the current system, if they then delete that cookie, that site no longer can tell that the user has opted out of receiving marketing messages.
Now, a new Web caching technique from AOL's behavioral targeting unit Tacoda is designed to preserve users' opt-out choices across the company's network of online properties.
"One of the problems was users overwriting that unique cookie," Jules Polonetsky, Chief Privacy Officer at AOL, told InternetNews.com. "People's choices need to be respected, so we're enhancing the opt-out process."
AOL, which purchased its Tacoda unit earlier this year to better assist it in targeting ads across its sites, said it is unsure about the necessity of the privacy groups' proposals to the FTC.
"We're studying this proposal to see if it's feasible," Polonetsky said. "What's important is consumer awareness. There is an opt-out process up and running."
The move comes as AOL and the larger online advertising industry are facing renewed calls for increased consumer protection.
Last year, after leaking 20 million search queries, a class-action suit filed in California against AOL alleged that the company violated the Electronic Communications Privacy Act and a set of California fair business laws.
Online privacy advocates have also sharply criticized Google's proposed acquisition of Web ad player DoubleClick, which is pending regulatory approval. In testimony given during Senate committee hearings on the subject, a handful of competitors and consumer advocates cautioned that the merger could have dire implications for online privacy.
The announcements also come a day before taking AOL and other online leaders are slated to take part in a two-day forum on privacy issues and tracking in online advertising, held by the FTC. The commission said the event will come as part of its effort to examine the effects of behavioral advertising on consumer privacy.