Monthly Archive for January, 2006

NASA Climate Expert Says US Tried to Silence Him

NASA’s top climate scientist has accused the Bush administration of trying to stop him from speaking out after he called in a lecture for swift cuts in emissions of the greenhouse gases linked to global warming.

James Hansen, director of the US space agency’s Goddard Institute for Space Studies, said that officials at NASA headquarters had ordered the public affairs staff to review his forthcoming lectures, papers, postings on the Goddard website and requests for media interviews, the New York Times reported Sunday.

“They feel their job is to be this censor of information going out to the public,” said Hansen, who told the paper he would ignore the restrictions.

“Since 1988, (Hansen) has been issuing public warnings about the long-term threat from heat-trapping emissions, dominated by carbon dioxide, that are an unavoidable byproduct of burning coal, oil and other fossil fuels. He has had run-ins with politicians or their appointees in various administrations, including budget watchers in the first Bush administration and Vice President Al Gore,” the Times reported.

Hansen told the Times that “efforts to quiet him” had begun in a series of calls after a lecture he gave on December 6, 2005, at the annual meeting of the American Geophysical Union in San Francisco.

“In the talk, he said that significant emission cuts could be achieved with existing technologies, particularly in the case of motor vehicles, and that without leadership by the United States, climate change would eventually leave the earth ‘a different planet’,” the Times said.

PhysOrg

Sonofusion Passes the Test!

A team of researchers from Rensselaer Polytechnic Institute, Purdue University, and the Russian Academy of Sciences has used sound waves to induce nuclear fusion without the need for an external neutron source, according to a paper in the Jan. 27 issue of Physical Review Letters. While this doesn’t mean enormous amounts of inexpensive energy, it is a step in the right direction.

The results address one of the most prominent questions raised after publication of the team’s earlier results in 2004, suggesting that “sonofusion” may be a viable approach to producing neutrons for a variety of applications.

By bombarding a special mixture of acetone and benzene with oscillating sound waves, the researchers caused bubbles in the mixture to expand and then violently collapse. This technique, which has been dubbed “sonofusion,” produces a shock wave that has the potential to fuse nuclei together, according to the team.

PhysOrg

“What Is , And Is, Is Endless” by Simon Haiduk – oil on canvas

Simon is a part of the podcollective.

Anthropologist’s ‘Sudden Evolution’ Theory Gets Boost From Cell Research

An article by University of Pittsburgh Professor of Anthropology Jeffrey H. Schwartz and University of Salerno Professor of Biochemistry Bruno Maresca, published Jan. 30 in the New Anatomist journal, shows that the emerging understanding of cell structure lends strong support to Schwartz’s theory of evolution, originally explained in his seminal work, Sudden Origins: Fossils, Genes, and the Emergence of Species (John Wiley & Sons, 2000).

In that book, Schwartz hearkens back to earlier theories that suggest that the Darwinian model of evolution as continual and gradual adaptation to the environment glosses over gaps in the fossil record by assuming the intervening fossils simply have not been found yet. Rather, Schwartz argues, they have not been found because they don’t exist, since evolution is not necessarily gradual but often sudden, dramatic expressions of change that began on the cellular level because of radical environmental stressors—like extreme heat, cold, or crowding—years earlier.

Determining the mechanism that causes those delayed expressions of change is Schwartz’s major contribution to the evolution of the theory of evolution. The mechanism, the authors explain, is this: Environmental upheaval causes genes to mutate, and those altered genes remain in a recessive state, spreading silently through the population until offspring appear with two copies of the new mutation and change suddenly, seemingly appearing out of thin air. Those changes may be significant and beneficial (like teeth or limbs) or, more likely, kill the organism.

Why does it take an environmental drama to cause mutations? Why don’t cells subtly and constantly change in small ways over time, as Darwin suggests?

Cell biologists know the answer: Cells don’t like to change and don’t do so easily. As Schwartz and Maresca explain: Cells in their ordinary states have suites of molecules—various kinds of proteins—whose jobs are to eliminate error that might get introduced and derail the functioning of their cell. For instance, some proteins work to keep the cell membrane intact. Other proteins act as chaperones, bringing molecules to their proper locations in the cell, and so on. In short, with that kind of protection from change, it is very difficult for mutations, of whatever kind, to gain a foothold. But extreme stress pushes cells beyond their capacity to produce protective proteins, and then mutation can occur.

EurekAlert

Food Cravings



Measuring the Angle of News

Neal Goldman’s Inform Technologies LLC converts news into math as each article is calculated in a multi-dimensional universe of topics to match the relevance to a news reader’s interests. Adding to its unique offering allowing users to dig deeper into stories, the news aggregator now offers audio, video, and RSS.

via FutureFeeder

Is Geometry Genetic?

An indigenous group called the Mundurukú, who live in isolated villages in several Brazilian states in the Amazon jungles, have no words in their language for square, rectangle, triangle or any other geometric shape except circles. . .Yet, researchers have discovered, they appear to understand many principles of geometry as well as American children do, and in some cases almost as well as American adults. An article describing the findings appears in the Jan. 20 issue of Science.

NYTimes

Internet Serves as ‘Social Glue’

The internet has played an important role in the life decisions of 60 million Americans, research shows.

Whether it be career advice, helping people through an illness or finding a new house, 45% of Americans turn to the web for help, a survey by US-based Pew Internet think-tank has found.

It set out to find out whether the web and e-mail strengthen social ties.

The answer seems to be yes, especially in times of crisis when people use it to mobilise their social networks.

In the past, it has been suggested that the internet and e-mail could diminish real relationships.

But the report, entitled The Strength of Internet Ties, found that e-mail supplements rather than replaces offline communications.

BBC

Scientists develop bird flu vaccine

University of Pittsburgh scientists say they’ve genetically engineered an avian flu vaccine that has proven 100 percent effective in mice and chickens.

The vaccine was produced from the critical components of the deadly H5N1 virus that has devastated bird populations in Southeast Asia and Europe and has killed more than 80 people.

Since the newly developed vaccine contains a live virus, researchers say it may be more immune-activating than avian flu vaccines prepared by traditional methods. Furthermore, because it is grown in cells, it can be produced much more quickly than traditional vaccines, thereby making it an extremely attractive candidate for preventing the spread of the virus in domestic livestock populations and, potentially, in humans.

“The results of this animal trial are very promising, not only because our vaccine completely protected animals that otherwise would have died, but also because we found that one form of the vaccine stimulates several lines of immunity against H5N1,” said Dr. Andrea Gambotto, an assistant professor and lead author of the study.

The research is detailed in the Feb 15 issue of the Journal of Virology and made available early online.

PhysOrg

South Pole Neutrino Detector Could Yield Evidences of String Theory

Researchers at Northeastern University and the University of California, Irvine say that scientists might soon have evidence for extra dimensions and other exotic predictions of string theory. Early results from a neutrino detector at the South Pole, called AMANDA, show that ghostlike particles from space could serve as probes to a world beyond our familiar three dimensions, the research team says.

No more than a dozen high-energy neutrinos have been detected so far. However, the current detection rate and energy range indicate that AMANDA’s larger successor, called IceCube, now under construction, could provide the first evidence for string theory and other theories that attempt to build upon our current understanding of the universe.

An article describing this work appears in the current issue of Physical Review Letters. The authors are: Luis Anchordoqui, associate research scientist in the Physics Department at Northeastern University; Haim Goldberg, professor in the Physics Department at Northeastern University; and Jonathan Feng, associate professor in the Department of Physics and Astronomy at University of California, Irvine.

PhysOrg

Microsoft Give Access to Source-code

Microsoft has said it will allow rival software companies access to license parts of the source code for its Windows operating system.

The concession was made in response to a 2004 European Commission anti-trust ruling, which ordered the company to be more open to competitors’ needs.

It came three weeks ahead of the EU’s compliance deadline, which threatened fines of 2m euros (£1.4m; $2.4m) a day.

The commission said it was not sure the offer would help resolve the dispute.

Microsoft’s legal chief, Brad Smith insisted “the source code is the ultimate documentation.

“It should have the answer to any questions that remain.”

But competition commissioner Neelie Kroes disagreed.

“Normally speaking, the source code is not the ultimate documentation of anything,” she said.

”[This is] precisely the reason why programmers are required to provide comprehensive documentation to go along with their source code.”

BBC

Worlds Smallest Fish Discovered

Researchers have found the smallest known fish on record in the peat swamps of the Indonesian island of Sumatra.

Individuals of the Paedocypris genus can be just 7.9mm long at maturity, scientists write in a journal published by the UK’s Royal Society.

tinyfishBBC

My Life as a Technosocial Participant-Observer

by Howard Reingold

For the past twenty years, I’ve thought, written, and talked about the way computers interact with minds, societies, and reality. Because I’ve lived in the place and during the era in which Silicon Valley and cyberculture emerged, I’ve been able to chronicle the microchip’s transformation of human thought, culture, and, governance as a participant observer. The mind, community, and civilization that have been changing as I’ve described them are my own mind, community, and civilization. As the technologies I’ve used and studied have grown more powerful, as my creative and professional work have become more enmeshed in PCs, online communities, and mobile phones, and as the use of microprocessor-based devices has changed fundamental aspects of the human world, my own attitudes about these technosocial changes have undergone an evolution. My opinions about the potential and danger of the always-on, smartifact-saturated, hyper-mediated, pervasively surveilled world we’re building have grown darker and more complex over the years.

I first used electronic tools to explore consciousness in the late 1960s. While I was in graduate school, studying neurophysiology, I worked with an electrical engineer to build a portable biofeedback machine. In 1968, brain researcher Joe Kamiya showed that the brainwaves of Zen monks were characterized by “alpha waves,” and that people were able to train themselves to produce more alpha waves by listening to an audible tone linked to a brainwave-measuring device. In my graduate school, the electroencephalograph (EEG) was the size of a refrigerator. The engineer I worked with managed to fit a transistorized version of an EEG machine into a box less than half the size of a small refrigerator. And then one day in the early 1970s he fit it all in the palm of his hand by using a new gizmo called an “operational amplifier” that put hundreds of transistors into a single chip. I didn’t realize at the time that I was witnessing the launch of Moore’s law.

I started writing professionally in 1973, using the kind of portable mechanical typewriter that writers had used for most of the 20th century. Buying my first electric typewriter was a big deal. Then there were correcting typewriters. I could swap out the typewriter’s printing ribbon cartridge for a correcting cartridge, then type over a mistake and cover it with white ink. When the microprocessor came along, I read about a company in New Mexico that would send you a home computer kit. You could make your own personal computer, enter programs by flipping switches, and make lights blink with your answers. When the Apple I came along in 1976, I began to hear rumors that people were finding ways to use computers to write on television screens. You could erase, correct, and move words and paragraphs automatically. The idea that such a thing was possible set me off on an investigation that never ended.

Art Futura

Some Hacks…

Here’s a variety of links to hacks and projects that I stumbled across today:


SploitCast – Ab3nd joins us to discuss magnetic card emulation.
How to make a Magnetic Strip Reader
A Solderless Power Supply for Experimenters
Homemade Solar Water Heater
Interfacing the ISA Bus
Call a regular phone using GoogleTalk


Is This Life?

HORDES OF GREEN, SUB-MICROSCOPIC BALLOONS FLOAT in a watery mixture in Jack Szostak’s laboratory at Harvard Medical School. They come in a variety of shapes: spheres, blimps, worms. And as Szostak examines magnified images of them, he can’t help but notice a striking resemblance to bacterial ecosystems, pulsing with that fetid, yet undeniable quality that has eluded definition for generations – life.

But these orbs aren’t alive.

The uncanny resemblance reflects the fact that these ersatz sacs may passably mimic the wrappings of primitive life: cell membranes. But infusing in them the real “stuff” of life requires more work. Lately, Szostak, a professor of genetics, has been putting simple RNA enzymes inside, showing that they can conduct their characteristic activities. Thus some of life’s chemistry is compatible with artificial membranes, he says, something that required a careful tweaking of the membrane chemistry. He has also made the sacs grow spontaneously, and even divide – with help.1 “It’s a simplified model of the situation we’d really like to have,” says Szostak: a growing, dividing, living organism of totally synthetic origins.

But even at present, he says, “These simple membrane systems do pretty fascinating things.”

The Scientist




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