2007年11月28日星期三
Sell Boron Carbide
http://buy-or-sell.org/Chemicals/Sell-Boron-Carbide-MqVd0QPV/
2007年11月27日星期二
Taking a Page From the Book of Flight
By Phil Berardelli
ScienceNOW Daily News
27 November 2007
For centuries, scientists and inventors have been attempting--nearly always unsuccessfully--to adapt the graceful beatings of a bird's wings for mechanical flight. A flapping craft would have two main advantages over planes and helicopters: It could stay airborne over a wide range of speeds and would be more maneuverable, achieving both without sacrificing aerodynamic efficiency. Such abilities could be particularly useful for unmanned aerial vehicles (UAVs), the lightweight aircraft the military increasingly employs for low-altitude reconnaissance.
Researchers from Pierre and Marie Curie University in Paris embarked on a unique strategy to apply the secrets of bird flight. They created a program called an evolutionary algorithm that essentially "evolves" a birdlike creature from scratch, refining designs that work and tossing those that don't. The team then appropriated the most successful designs from the algorithm to create a simulated UAV. The simulation achieved a birdlike energy efficiency flying at speeds between 10 meters and 12 meters per second, the researchers report in the December issue of Bioinspiration and Biomimetics. Based on the tests, the team has built a mechanical prototype with the goal, says biologist and lead author Emmanuel de Margerie, of improving wing designs based on further refinements from the algorithm.
Evolutionary roboticist Inman Harvey of the University of Sussex, U.K., praises the team's artificial evolution approach. It allows the exploration of designs "that a human designer might not have considered venturing into," he says. Still, the team's findings are limited, says research engineer Robert Michelson of the Georgia Institute of Technology in Atlanta. He notes, for example, that the simulated UAV the researchers developed is only efficient at relatively high speeds; at lower speeds, flight efficiency drops dramatically. And despite its advantages, flapping flight has its share of kinks. The bouncing reduces the value of the craft as a camera platform, says Michelson, and flapping can place large strains on wings. So far, these "have been the long poles in the creation of flapping-wing micro air vehicles," he says.
ABS Plastics Fairings For Motor Cycles
http://buy.buy-or-sell.org/Automobile/ABS-Plastics-Fairings-For-Motor-Cycles-Jq0id7eC/
Cyber Monday Shopping Traffic Breaks Records, Sites
Sales up, but sites down? Record site traffic might be a victory for the marketing departments, but IT gets a mixed report card, according to Keynote Systems, a research firm that measures Web site performance. Just as on Black Friday, many e-commerce sites buckled under the weight of the traffic, which created significant slowdowns in product search and checkout. Brick-and-mortar retailers suffered the biggest problems, according to Keynote, with Toys "R" Us' site experiencing slowdowns of up to 300 percent, JCrew.com's transaction processing slowing by up to 400 percent, and Costco's site performance flagging by as much as 500 percent in periods of peak traffic. Yahoo's hosted shopping service, which Keynote does not track, also hit major snags due to heavy traffic. Yahoo hosts the e-commerce services for many smaller retailers, who found that their shopping cart services were unable to process transactions yesterday afternoon. Shortly after noon yesterday, Yahoo posted an acknowledgement on its Small Business site that shoppers had been receiving a "system unavailable" message when trying to checkout on some merchants' sites. At 9:51 p.m., Yahoo reported that after some reconfiguration, all merchants could process transactions, but some could expect slower-than-usual site performance. This morning, at 2:06 a.m., Yahoo reported that the issue had been resolved and that it was "actively monitoring all systems involved." Yahoo's problem may have been an anomaly, but Keynote's research suggests that the strain of heavy traffic on site performance is not, with site slowdowns also having taken place on Black Friday. However, even with Black Friday's difficulties, enough of the day's shoppers held on through the checkout process to post impressive numbers. Online shoppers spent $531 million on Black Friday, up 22 percent from last year, comScore has reported. On Thanksgiving, online retail spending rose 29 percent from last year to $272 million. The company also said that for the first 23 days of November (ending on Black Friday), online retail spending reached $9.36 billion, up 17 percent from the same period last year. And the hottest product segment so far this shopping season? Sales of video games, consoles and accessories are up 134 percent from last year, propelled in large part by hot items like the Nintendo Wii, Sony Playstation 3 and Halo 3, according to comScore.
Sell Nicotinic Acid
http://buy-or-sell.org/Chemicals/Sell-Nicotinic-Acid-80QyWyPd/
Gene Therapy Did Not Kill Patient, Study Finds
By Jocelyn Kaiser
ScienceNOW Daily News
26 November 2007
The trial conducted by Targeted Genetics Corp. was shut down after the 24 July death of 36-year-old Jolee Mohr of Taylorville, Illinois, who received a gene-therapy injection to treat her rheumatoid arthritis in one knee 3 weeks earlier (Science, 3 August). At a September meeting of the federal Recombinant DNA Advisory Committee (RAC), experts noted that Mohr apparently died mainly from a fungal infection called histoplasmosis that her immune system was unable to fight off (ScienceNOW, 17 September). Mohr's immune system may have been compromised by an arthritis drug she was taking, Humira, which blocks an inflammatory molecule called tumor necrosis factor %26alpha; (TNF-%26alpha;). The protein produced by the gene therapy is also a TNF-%26alpha; blocker, and if it spread beyond Mohr's knee, the combination with Humira may have left her vulnerable to the fungus.
That did not happen, according to Targeted Genetics. The company points to new test results from an investigation by the company and outside researchers, which were presented at the American College of Rheumatology annual meeting earlier this month. The level of TNF-%26alpha; blocker detected in Mohr's blood with a binding assay was "well within the normal range expected" from the dose of Humira she was taking, says President and CEO H. Stewart Parker. The new tests also ruled out the idea that the gene-therapy vector, adeno-associated virus, replicated in Mohr's body. Although DNA from the vector turned up in other tissues, the amounts were extremely low. Today, the company announced that the U.S. Food and Drug Administration has lifted the hold on the trial.
Others agree that the case is closed. "It does not look like the gene therapy played a role to the best of our knowledge," says physician Kyle Hogarth of the University of Chicago in Illinois, who treated Mohr and took part in the investigation. However, Hogarth questions whether it makes sense to enroll patients who are already taking TNF-%26alpha; blockers in the study, because it's difficult to distinguish between the effects of the gene-therapy product and the drugs. Parker disagrees, noting that rheumatologists say "there is a significant unmet need" for treatments for patients with joints that do not respond to the systemic drugs.
The company now plans to resume the trial of 127 patients but will not give a second dose to as many as 35 awaiting patients if they have a fever, as Mohr did. "We are being conservative," says Parker. She says the only change to the informed-consent document will be to note the earlier death. RAC will issue its final conclusions about the case at a meeting next week. RAC Chair Howard Federoff of Georgetown University in Washington, D.C., declined to comment in advance of the meeting.
Sarong, Elastic Back With Coconut Shell Toggle
http://buy.buy-or-sell.org/Apparel/Sarong-Elastic-Back-With-Coconut-Shell-Toggle-KDMhc2Ee/
Brand Clothes
http://buy.buy-or-sell.org/Apparel/Brand-Clothes-UkiF04Mj/
2007年11月25日星期日
Untangling an Artistic Spider Web
By Matt Kaplan
ScienceNOW Daily News
19 November 2007
Scientists have been trying to decipher the purpose of patterned Argiope webs since they were first spotted in 1889. Some have suggested that the designs lure prey or deter predators, whereas others have argued that they function as a sort of detour sign that prevents birds from flying into the webs. But evidence for these theories has been lacking.
So biologists Ren-Chung Cheng and I-Min Tso of Tunghai University in Taichung, Taiwan, set up shop at a forest edge meadow in the country's Nantou County. The researchers installed cameras in front of various webs and collected more than 700 hours of video over a 2-month period. Their target was Argiope aemula, commonly known as the St. Andrew's cross spider because of the white "X" it weaves. The team filmed 56 webs with decorations and 59 without them.
The disparity had significant consequences. Decorated webs intercepted 60%26#37; more insects than the nondecorated ones did, the researchers report in the November/December issue of Behavioral Ecology. But the patterns also increased the risk of predation. Of the 18 recorded wasp attacks, two-thirds were against spiders with patterned webs. "This suggests that decorations are acting as a lure, drawing the attention of both prey and predators," says Tso, who notes that the increased risk of predation may explain why not all Argiope aemula spiders decorate. Such tradeoffs have been observed in other species--chorus frogs, for example, chirp loudly at night to attract mates, yet the calls also lure garter snakes--but this appears to be the first example of the phenomenon in a structure an animal builds.
As to why creatures find the Argiope webs so alluring, entomologist En-Cheng Yang of the National Taiwan University in Taipei notes that many insects such as honey bees have an innate preference for symmetric patterns. "It is very likely that the shape of the St. Andrew's cross gives a strong visual stimulus to insect predators and prey, but further neuroethological study is needed to clarify this mystery," he says.
2007年11月23日星期五
Sell Kitchen Design
http://buy-or-sell.org/Business_Services/Sell-Kitchen-Design-5BCR5nvu/
Sell Lift
http://buy-or-sell.org/Automobile/Sell-Lift-_DLR0VL9/
Sell ATV-Trailer
http://buy-or-sell.org/Automobile/Sell-ATVTrailer-vuoeEtsO/
2007年11月10日星期六
Second Hand Machines And Instruments For Venetian Blinds AMD Vertical Blinds
http://buy.buy-or-sell.org/Agriculture/Second-Hand-Machines-And-Instruments-For-Venetian-Blinds-AMD-Vertical-Blinds-yuh9UtRy/
Buy Rapes From China O The Other Countrys
http://buy.buy-or-sell.org/Agriculture/Buy-Rapes-From-China-O-The-Other-Countrys-Nf_2Mck4/
Buy Black Annealed Binding Wire
http://buy.buy-or-sell.org/Agriculture/Buy-Black-Annealed-Binding-Wire-eHjY7nyD/
look for Cooperation on Sweater Factory
Looking for genuine investors from European Countries only, to invlove in manufacturing sweaters / T- shirts in Bangladesh.I am in possession of 1.5 acre of industrial plot with brand new 03 sheds recently constructed, measuring 95 f
http://buy-or-sell.org/Apparel/-look-for-Cooperation-on-Sweater-Factory-I_sSobc4/
2007年11月9日星期五
Sell Chlorophacinone
http://buy-or-sell.org/Agriculture/Sell-Chlorophacinone-kHg5bvOq/
Sell Corn silk
http://buy-or-sell.org/Agriculture/Sell-Corn-silk-ab-6eiXI/
Sell Railway Accessory
http://buy-or-sell.org/Agriculture/Sell-Railway-Accessory-swivu2Tm/
Microsoft to Roll Back the Clock on ActiveX
Online Ad Spending Expected to Double by 2011
Technical Analysis: Breakdown
2007年11月8日星期四
Salesforce.com Scrambles To Halt Phishing Attacks
2007年11月2日星期五
Tech Stocks Dodge Financial Woes
2007年11月1日星期四
Cisco Seeks Next Billion-Dollar Idea
Cisco has launched a contest that promises to make for some very happy winners.
The Cisco I-Prize is a global competition the company said is designed to help it find the next billion-dollar opportunity. The main requirement is that teams must use Cisco's collaboration technologies to develop their projects. The winning team will get an employment contract with a $250,000 signing bonus and up to $10 million in funding over three years to develop the business.
One aspect of the I-Prize venture that's not a surprise is Cisco's willingness to invest in new ideas; it's one of the most acquisitive tech companies around.
Still, at first glance it might seem odd that Cisco sees the need to make such a large, structured outreach effort for new ideas. After all, the tech industry is littered with venture capital events, startups and entrepreneurs constantly pitching new ideas. But Silicon Valley veteran analyst Tim Bajarin said it makes sense.
"I actually think it's a very smart move," Bajarin, president of Creative Strategies, told InternetNews.com. "The key reason you do this as a contest is that it lets you (Cisco) create the rules that strategically meet the needs of the company and grow its business."
Indeed, the company said one of the premises of the I-Prize contest is that ideas "have the potential to bring in at least $1 billion revenue to Cisco over a five- to seven-year period, and submissions must use the IP network as a platform."
And though Silicon Valley and other tech hot spots across the U.S. are swimming with new ideas, Bajarin said he wouldn't be surprised if the winner comes from outside this country. "The probability of it coming from the U.S. might be less than 35 percent given the global reach of engineering innovation."
Marthin DeBeer, senior vice president of Cisco's emerging technologies group, said in a statement that inventors and entrepreneurs in various parts of the world don't have access to funding but have excellent ideas. "We want to give those innovators an outlet and a means to develop their dream."
Submissions are due between now and Jan. 15. Once chosen, up to a hundred semifinalists will present throughout February a more detailed report on the market opportunity and technology that define their proposed businesses. And between March 15 and April 30, the finalists will present their business plans to a judging panel of "industry luminaries" and Cisco senior executives using Cisco's TelePresence teleconferencing system.
Cisco isn't the only tech outfit extending beyond its boundaries. Microsoft last month announced the Startup Accelerator Program, which gives designated startups access to technical and marketing resources inside Microsoft.
Technical Analysis: Chips, Banks Are the Ones to Watch
Little has changed from our last update a week ago: the market put in a credible bottom just in time for the strongest part of the year historically and has built on that base nicely since. But with sentiment mixed, the Nasdaq and S%26amp;P facing some critical tests and some key indexes continuing to lag, the year-end period could continue to be choppy.
The market's strength in the next few months will likely have much to do with the ability of the financial and semiconductor sectors (see first two charts below) to right themselves from their own mini bear markets. Both are hovering near their August lows and will need to turn up sharply if the broader market is to have much of a chance of a significant advance.
In short, the bulls have the advantage, but they need broad participation to pull it off.
The 10-year-yield, meanwhile, returned to neutral after today's rate cut (see third chart below). 4.5% has become a fulcrum here; whichever side of that line the 10-year trades on will say much about the bond market's perception of where the economy is headed.
Paul Shread is a Chartered Market Technician (CMT) and member of the Market Technicians Association.