2007年12月29日星期六
In 2008, Your Network Will Know Who You Are, What You Want
Network smarts A theme I heard time and again from vendors big and small during 2007 was that the network was getting "smarter." More intelligence is being embedded into the network layer than ever before, with 2008 now poised to be a watershed year for the smart network. Today, networks at a basic level are no longer "dumb" pipes that transport information. The networks of 2008 will build on recent and coming innovations to become application- and user-aware -- they'll know who you are and what you are allowed to do (or what you're prohibited from doing). Intelligence in 2008 will arrive in the form of more Ethernet standards that provide increasing amounts of information about data types. Intelligence will also come in the form of smarter quality-of-service (QoS) and bandwidth-management offerings that intelligently provision the right bandwidth at the right QoS for users and their applications.
Network security The smarter network of 2008 will rely strongly on Network Access Control (NAC). While NAC has been a buzzword for several years, NAC will go mainstream in the coming year thanks to Microsoft. A key component of Microsoft Windows Server 2008 is what it terms Network Access Protection, or NAP. The cornerstone of the technology is pre-admission control: A NAP server will first validate the health of an endpoint (a user or machine, for instance) before allowing admission to the network. Microsoft's Windows XP Service Pack 3, as well as Windows Vista, are both ready to serve as NAP endpoints. Due to Windows's massive installed base, Microsoft's NAP will be something that enterprises can activate out of the box to begin to secure their networks. The power of access control for the smart network of 2008 cannot be understated. If hundreds of millions of Windows users are using NAP, it may end up being the single most important security innovation since the invention of the firewall. Imagine: a world where insecure endpoints aren't granted access to do their dirty deeds. What a wonderful world it would be.
Network identity The smart network of 2008 isn't just more secure, it also knows who you are and what you need access to. While directories such as Microsoft's ActiveDirectory have been used for identity for years, they're not enough. The 2008 network will have identity built into the framework of the network itself. The big push for network identity in 2008 will come from Cisco, with its TrustSec initiative. Instead of a user needing to enter multiple passwords for each and every application they need to visit, a TrustSec-powered network essentially will know who they are, what their business function is and where they're allowed to go. From a Big Brother-auditing point of view, TrustSec, and its various competitive implementations from vendors other than Cisco, also will offer a full audit trail of a user's activities at both a network level and the application level. By embedding identity into the network layer, the network will have better understanding and control over what users are doing. Next page: Networks will become faster and more pervasive.
2007年12月27日星期四
Apple Explores Wireless Commerce, Microsoft-Like DRM
Windows-esque DRM for the Mac? It's also not certain how Apple intends to make use of its DRM patent filing, No. 20070288886, titled "Run-Time Code Injection To Perform Checks." That filing describes a system that enables an application developer to add code into their app's runtime instruction stream that would restrict execution to specific hardware platforms. "An authorizing entity (e.g., an application owner or platform manufacturer) authorizes one or more applications to execute on a given hardware platform," the patent filing reads. "Later, during application run-time, code is injected that performs periodic checks ... to determine if the application continues to run on the previously authorized hardware platform." According to the document, if one of these periodic checks fails, "at least part of the application's execution string is terminated -- effectively rendering the application non-usable." The filing also said that the verification check is "transparent to the user and difficult to circumvent." A similar plan -- tying an application to specific hardware and regularly checking that the software is running on authorized hardware -- has been at the crux of Microsoft's efforts to stamp out piracy in a number of its own products. The company's WGA, the technology behind its DRM initiatives, has been applied to products including Windows XP, Windows Vista and Office 2003 and later. It's also long been the focus of controversy for its intrusiveness and false positives. Ironically, Microsoft of late has seemed to be distancing itself from such technology. The company backed off on some of the more aggressive uses of WGA last year, and this year further relented with IE 7. Earlier this month, Microsoft also said it planned to end one of the most controversial features of Windows Vista's WGA implementation -- its so-called "kill switch." That feature had disabled features in Vista copies that failed to pass Microsoft's verification process.
2007年12月26日星期三
WAN Optimization Market Booming
2007年12月22日星期六
A 'Building Year' For Mobile Banking
The Year In Chips And Spam
Stocks Rocket on RIM's Results
Are You Violating BusyBoxs GPL Code?
2007年12月21日星期五
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2007年12月20日星期四
Red Planet Still Packs Surprises
By Phil Berardelli
ScienceNOW Daily News
20 December 2007
The glacier discovery was announced Wednesday by the European Space Agency (ESA). A high-resolution stereo camera aboard ESA's Mars Express spacecraft spotted the feature in a region called Deuteronilus Mensae, located in the mid-north latitudes of the planet. The Mars Express science team drew the preliminary conclusion that the material in the feature is water ice and that it accumulated as recently as 10,000 years ago, probably from an underground source. Other deposits of water ice have been mapped at the martian poles, but they're much bigger and are millions of years old. The find is a surprise because the prevailing view is that any water reaching the martian surface from underground quickly evaporates and eventually drifts into space. Yet all of the physical characteristics of the feature are "consistent with that of a glacier," says geologist and team member Ronald Greeley of Arizona State University in Tempe.
Meanwhile, in the 21 December issue of Science, a team from Harvard University and the Massachusetts Institute of Technology offers a possible solution for the curious absence of carbon-based minerals on Mars. A buildup of carbon dioxide in the ancient martian atmosphere supposedly produced enough of a greenhouse effect to allow liquid water to flow for a time on the surface. The problem is that such a process should have deposited ample carbon-containing minerals on the planet's surface--something that hasn't been found. So the researchers have come up with a new explanation: Large amounts of sulfur dioxide (SO2) in the atmosphere, the result of early volcanic activity, captured enough heat to allow water to flow. This would explain the plentiful distribution of sulfates among martian minerals, as sulfur dioxide fell out of the atmosphere and mixed with the wet surface.
The research suggests that "it is possible to build up enough atmospheric SO2 to help warm early Mars," says planetary geochemist and lead author Itay Halevy of Harvard. This revelation, he notes, also "might imply that SO2 played a more important role in Earth's history than previously thought."
Planetary geologist Alfred McEwen of the University of Arizona in Tucson, who is principal investigator for the HiRISE camera aboard NASA's Mars Reconnaissance Orbiter, says the potential glacier is intriguing enough that MRO should also image Deuteronilus Mensae and train the spacecraft's spectrometer on the site to scan for water ice. He cautions, however, that other, similar martian features have turned out to be made of indurated dust, which resembles ice in orbital images.
Related sites
2007年12月19日星期三
Toshiba, IBM Team on Chips
2007年12月18日星期二
Web Phone Development Platform Takes Flight
2007年12月17日星期一
Adobe Starts Big Earnings Week On An Up Note
2007年12月13日星期四
One Small Step for Plants
By Elizabeth Pennisi
ScienceNOW Daily News
13 December 2007
Mosses, along with hornworts and liverworts, are primitive plants called bryophytes. They diverged from the ancestors of flowering plants more than 450 million years ago. Plants got their start in water, and the move onto land by algae-like ancestors was quite challenging, requiring the evolution of the ability to deal with fluctuations in temperature and access to water, as well as to more intense sunlight. Mosses took steps to cope but never evolved certain features, such as vascular tissues that could transport water and seeds that could survive dry spells, that eventually appeared in flowering plants. By sequencing the genome of the extensively studied moss Physcomitrella patens and comparing it to the sequenced genomes of rice, the flowering plant Arabidopsis, and single-cell algae, an international team has been able to look at what the ancestral land-plant genome looked like.
Their first surprise, says developmental biologist Ralph Quatrano of Washington University in St. Louis, Missouri, was the abundance of genes. Some of these, such as the genes that help mosses come back to life after being dried out, are shared with other land plants and so evolved even earlier in plant evolution. Additional water-stress genes suggest that P. patens has evolved independent ways to deal with water shortages as well, says Quatrano. The moss also has extra genes for DNA repair to cope with damage inflicted by sunlight.
It seems likely that the ancestor of P. patens underwent a whole-genome duplication early in its history, Quatrano notes, possibly freeing up some genes to take on new functions. About 20%26#37; of the moss's genes are new to researchers and likely specific to moss, Quatrano and his colleagues report online 13 December in Science.
William "Ned" Friedman, an evolutionary biologist at the University of Colorado, Boulder, is excited about the potential of the moss genome to reveal clues about how plants accomplished the transition to land. However, as evolutionary biologist Pamela Soltis of the University of Florida, Gainesville, points out, genome researchers have barely touched the plant family tree. Fish and humans represent about the same evolutionary distance as rice and moss. That means a lot more sequencing needs to be done before the leap from water to land can be fully understood, she says.
Green Grid Gig To Highlight Commonality, Cooperation
2007年12月10日星期一
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IDC: Blame 2007's Biggest Trends For IT Spend Slowdown
New Bill Demands ISPs Report Online Child Exploitation
In-Flight E-mail, IM Service Takes Wing From JetBlue
2007年12月6日星期四
Embedded Linux Seen as Ready For Prime Time
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2007年12月5日星期三
U.K. Bets Big on Biomedical Research Facility
By John Travis
ScienceNOW Daily News
5 December 2007
The new project, which is expected to combine both basic biology and clinical research under one roof, will be developed by an unusual collaboration between the U.K. Medical Research Council (MRC), two medical charities--the Wellcome Trust and Cancer Research UK--and University College London. "Pooling our resources helps us invest in technologies we might not on our own," says Harpal Kumar, chief executive of Cancer Research UK, which will move more than 40 labs to the planned center.
Paul Nurse, a British biochemist, Nobel laureate, and president of Rockefeller University in New York City, will lead a planning committee to decide exactly what the site will contain by its predicted completion date of 2013. In addition to the Cancer Research UK labs, the World Influenza Centre--a component of MRC's National Institute for Medical Research (NIMR)--will occupy the land. Researchers at NIMR, which currently sits on the outskirts of London, have resisted past efforts to relocate downtown (Science, 4 February 2005), and MRC hasn't detailed how many of NIMR's other labs will be included in the new center.
The planned site is adjacent to the recently reopened St. Pancras terminal that connects the United Kingdom to the rest of Europe via high-speed rail. This aspect was "absolutely critical" for the project, as the transportation links will make international collaborations easier, says Wellcome Trust Director Mark Walport. The trust will contribute %26pound;100 million to the facility's construction. In addition, the proximity to the library will encourage science education efforts, he notes.
A government department sold the site to the collaboration for %26pound;85 million, despite receiving offers from private developers for more than %26pound;100 million. Local residents seeking affordable housing for the site may try to block the new research facility, however, as may those who fear that the new labs could expose London to accidentally released infectious agents.
2007年12月4日星期二
MySpace The Music (Video) Exchange
2007年12月3日星期一
A Long, Hard Look at the Early Universe
By Phil Berardelli
ScienceNOW Daily News
28 November 2007
Galaxies don't spring into existence full-sized overnight. In an early era of the universe, tiny versions of the Milky Way coalesced out of gigantic clouds of hydrogen gas that permeated the cosmos. Over the course of a billion or so years, these budding galaxies began merging, with half a dozen or more of them needed to form galaxies the size of our own. At least, that's what the theorists calculated. The problem is that, because they are so faint, such small galaxies have been extremely difficult to detect. The search has been "a hard game," says astronomer J. Christopher Mihos of Case Western Reserve University in Cleveland, Ohio.
What was needed, it turns out, was patience and a great set of instruments. Astronomers from the University of Cambridge in the U.K. and from the Observatories of the Carnegie Institution of Washington in Pasadena, California, focused two of the world's biggest telescopes on the same tiny patch of sky, near the constellation Aquarius, for a total of 92 hours--practically an eternity of observational time. Voil%26agrave;! By capturing spectra of hydrogen gas clouds, backlit by stars within the galaxies and 10 times fainter than anything seen before, the researchers identified 27 protogalaxies from a time when the universe was only 2 billion years old--and at a distance from Earth of 22 billion light-years. As the team will report in the 1 March 2008 issue of The Astrophysical Journal, the chemical signature of the objects' dim light confirms their existence and very young age.
Now that they know that they can find such objects, co-author and Carnegie astronomer Michael Rauch says he and his colleagues will try to learn more about protogalaxies by observing other swaths of the sky. "The beauty is that these new galaxies are so numerous that you can stare anywhere in the sky and find some of these objects, even in a very small field," he says. Before this study, astronomers had assumed that they could detect only the brightest distant galaxies from ground-based telescopes, Rauch notes. That was "the tip of the iceberg," he says. "Now we have dived deep enough to see the bulk of the iceberg itself."
Astronomer Mark Voit of Michigan State University in East Lansing agrees. "People have been searching for objects like these for a long time without success," he says. "It really does open a new window on the process of galaxy formation."
Signs of Lightning on Venus
By Richard A. Kerr
ScienceNOW Daily News
28 November 2007
Lightning can change the chemistry of an atmosphere and give researchers clues to the storm activity of a planet. It's common enough in planets with thick atmospheres. Bolts 100 times more powerful than terrestrial ones crackle on Jupiter, and it has been detected on Saturn, on Uranus, and probably on Neptune. After its 1979 arrival at Venus, the Pioneer Venus Orbiter recorded electrical impulses leaking out of the atmosphere that some researchers took to be a signature of lightning. Later, Galileo swept by and detected noise bursts at much higher frequencies, encouraging more faith in venusian lightning (Science, 27 September 1991, p. 1492). But expectations dimmed with Cassini's failure to detect lightning's distinctive radio static during its two flybys.
With the European Space Agency's Venus Express in the neighborhood, space physicist Christopher Russell of the University of California, Los Angeles, and his colleagues were looking for the magnetic signals that should accompany the electrical signals observed by the Pioneer Venus Orbiter. In the 29 November issue of Nature, they report that Venus Express detected bursts of 100-hertz magnetic radiation lasting 0.25 to 0.5 seconds and occurring at least half as often as lightning on Earth. "They were pretty much as we'd predicted," says Russell. "Lightning is occurring beneath the spacecraft about 25%26#37; of the time."
"That is one possibility," says a more skeptical space physicist, Georg Fischer of the University of Iowa in Iowa City. As was the case with the Pioneer Venus data, he says, these signals might instead be generated by processes involving the charged particles and magnetic fields draped around the planet. For his part, Fischer has struck out in finding lightning on Titan. In a paper published online 28 November in Geophysical Research Letters, he and colleagues report that Cassini has failed to detect lightning's radio emissions during the spacecraft's first 35 flybys of the moon.
At Venus, at least, Japanese scientists are looking to break the impasse the old-fashioned way: by catching any lightning flashes with a camera. Their Venus Climate Orbiter is due to arrive in 2010.
IDC: Slow Sales For Servers
2007年12月1日星期六
Not Again, Dear. I'm Sperm-Depleted
By Benjamin Lester
ScienceNOW Daily News
29 November 2007
Topi are "lek" breeders. For a month and a half each year, males congregate at a mating arena, or lek, to compete for barren patches of about 30 square meters. The biggest, fittest males, known as lek males, command plots in the center of the arena, and females, which come into heat for just 1 day per year, seek them out. These prized bulls mate as many as 36 times in just 30 minutes. A female copulates with about four males during her visit to the arena, usually mating with each male multiple times. Although they prefer lek males, nearly 75%26#37; of females also mate with less hunky males.
The males keep this up for the entire rut, only occasionally nipping off for a bite to eat, says behavioral ecologist Jakob Bro-J%26oslash;rgensen of the Institute of Zoology in London. Bro-J%26oslash;rgensen studies topi in Kenya's Masai Mara National Reserve, and the sheer length of the rut interested him in the role that sperm depletion might play. In related species, he says, repeated mating can deplete sperm, meaning that with each additional ejaculation, the male is less likely to fertilize the female.
Bro-J%26oslash;rgensen reasoned that female topi, particularly if they have already mated with a less fit male, should want to mate as many times as possible with desirable males to maximize their chances of conceiving high-quality offspring. Conversely, males, which encounter many different females during the rut, pay an "opportunity cost" if they mate mainly with one female because they might run low on sperm.
As Bro-J%26oslash;rgensen reports online 29 November in Current Biology, lek males with two females on their territory at once tended to focus their attention on the female they'd mated with less. The other female often became aggressive toward the mating pair (see movie), attempting to shift the male's attention back to her. However, her aggression sometimes backfired. Seven percent of the time, the male counterattacked. An aggressive rebuff was particularly likely when she'd already mated with him several times. According to Bro-J%26oslash;rgensen, it's often assumed that males are the pursuers because for them, mating is less costly. However, he says, "In topi, there is a reversal."
According to behavioral ecologist Brian Preston of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, the finding "challenges conventional wisdom that males should mate whenever the opportunity arises." However, says Preston, the work "rests on an untested assumption that males do become sperm depleted. This has been shown only rarely in natural systems."
NIH Criticized for Flawed Review of Biosafety Lab
By Jocelyn Kaiser
ScienceNOW Daily News
29 November 2007
The proposed Boston University lab in the city's South End, which has $128 million in NIH funding, will include biosafety level 4 (BSL-4) facilities for studying deadly pathogens such as Ebola virus and Lassa fever. In response to lawsuits filed by opponents who think densely populated downtown Boston isn't an appropriate site for the lab, NIH conducted a study of alternative sites outside Boston and of worst-case scenarios in the unlikely event of a pathogen escape (Science, 11 August 2006, p. 747). The agency released a draft report in July that found the risks were quite low: No more than about 100 people would die if, say, Ebola or the Rift Valley fever virus got out into the community. The state of Massachusetts then asked for an independent review by the National Research Council (NRC).
The NRC panel found numerous problems. One is that NIH failed to consider highly transmissible agents such as avian influenza and SARS. The 11-member panel also faulted the modeling--for example, NIH didn't adequately consider uncertainties about how quickly some pathogens move through the population. And the NIH study gives short shrift to issues of environmental justice, such as the higher risks to AIDS patients living in the South End. If the report were an article submitted to a scientific journal, "we would have rejected this," said panelist Gigi Kwik Gronvall of the University of Pittsburgh Center for Biosecurity in Baltimore, Maryland, in a press call.
Boston University environmental health expert David Ozonoff, a critic of the lab, isn't surprised by the review. "It just wasn't a good report," he says. In a statement, NIH says it will consider the NRC review along with other comments on the draft. Construction on the lab will continue, but the pending risk assessment could delay the resolution of federal and state lawsuits opposing operation of its BSL-4 suites.
Meanwhile, three other new BSL-4 labs funded by NIH are moving along without major opposition. All have environmental impact statements, but apparently they did not draw as much scrutiny as NIH's study on the Boston lab.