--Advertisement--
Ad by The Cutting Edge News

The Cutting Edge

Thursday October 19 2017 reaching 1.4 million monthly
--Advertisement--
Ad by The Cutting Edge News

The Edge of Evolution

Mothers' Ancestry Influences Weight of Babies Born at High Altitudes

June 1st 2009

Science - Indian Himalayan Mother
Indian Himalayan Mother

After Spanish colonialists moved into South America centuries ago, almost 60 years elapsed before the European women were able to give birth successfully at the high altitudes of the Andes. But indigenous Andean women had no problems with their babies. Now some researchers from Colorado are finding out why that may have been the case.

Anthropologist Colleen Julian, who works at the Altitude Research Center at the University of Colorado, says research has shown that babies born at high altitudes tend to be smaller than those born at sea level.

"But some populations are protected from that effect," Julian says. "So, for example, women who have lived at high altitudes for extended periods of time as a population... the babies who are born to those women tend to be protected to the effects of altitudes." Read more ..


Fighting Fire with Fire

Researchers Call for Creation of Fire Science

May 25th 2009

Social Topics - Firemen

An international group of researchers is calling for the creation of a separate scientific discipline devoted to the study of fire. The scientists say there's a basic lack of understanding about fire, which impacts virtually every aspect of life on earth.

Uncontrolled fires cause billions of dollars a year in damage to health, livelihoods and biodiversity, yet experts say relatively little is known about this primitive element and its impact.

In a paper published this week in the journal Science, co-author Steve Pyne and colleagues say there's currently no systematic, scientific way to study fire.

Pyne, a fire historian at Arizona State University in Tempe, says a separate fire science is long overdue.

"Fire is an enormous large ancient presence and it has not been considered in our disciplines. There is no fire topic as a discipline. You know the other ancient elements—earth, air and water—all have disciplines devoted to them but fire doesn't," he said.

Pyne and nearly two dozen other researchers compiled current data on fire's impact on global warming to underscore the need for a new fire discipline. The scientists report that all fires combined—from the intentional blazes farmers use to clear forest to the accidental wildfires sparked by both man and nature—release an amount of carbon dioxide equal to half the CO2 emissions from the burning of fossil fuels. They say that fires also pump other potentially climate-changing pollutants into the atmosphere, including methane gas, aerosols and soot.

Read more ..

Genetic History

Unlocking Africa's Genetic History Reveals Insights for all Humankind

May 18th 2009

Science - Neanderthal

A group of scientists has unveiled what they say is the most comprehensive study ever of African genes which they say gives new insight into the origins of humans.

The genetic study, a compilation of two big studies, confirms theories that modern humans evolved in Africa and then migrated through Europe and Asia to reach the Pacific and Americas. The study also shows that Africans have the most diverse DNA, and the fewest potentially harmful genetic mutations.

Published in the journal Science, researchers examined genetic material from 121 African populations, as well as four African-American populations and 60 non-African populations. The study aims to teach Africans on population history and aid research into why diseases hit particular groups.

The researchers found that after a population of humans migrated off the African continent, the group shrank for some unknown reason. Later populations grew and spread from this smaller genetic pool of ancestors.

Populations that remained in Africa kept their genetic diversity. Read more ..


The Edge of Life

Plants and Animals Nurture Offspring Just Like Human Mothers

May 11th 2009

Animals - Hippo and baby
Pygmy Hippo Mother and Child

Last Sunday was Mother's Day, a special day set aside for honoring mothers and celebrating all those qualities and actions that make mother "Mom." But animals and even plants also have evolved their own dizzyingly diverse maternal behaviors over the millennia, all aimed at ensuring that their offspring survive and thrive.

Columbia University ecologist Shahid Naaem says Mother's Day is a time to celebrate mothering in all species of life. He says humans instinctively recognize that mothering is critical not only to the survival of our species, but to every other single species one sees.

"Even if it's just an insect on the ground or plants or the mushrooms growing in the forest, or the birds flying overhead," he says, "[its mothering qualities are] a sign that life on Earth is working!"

Like other primates - a group of mammals that includes monkeys and apes - we human beings spend long periods of time gestating, then caring for, our young, usually in groups. Columbia zoology professor Marina Cords, who has spent years observing groups of blue monkeys in the forests of Kenya, is often reminded of them when she sees groups of human mothers and their infants in New York City's parks. Read more ..


The Future of Farming

Robots Bring Change to U.S. Farming

May 5th 2009

Technology - Robotic Orange Harvester
Proposed VRC robotic orange harvester

Mechanization has made the modern farmer's life a lot easier. That's especially true for those who grow crops like wheat, soy or corn on big, broad fields. But the story is quite different for growers who raise fruit, nuts, vegetables or nursery plants. 

These so-called specialty crops - a $45-billion-a-year business in the United States - require intensive hand labor. Faced with rising labor costs, a shortage of workers and increasing demand for safe and affordable products, specialty growers are desperate for ways to boost food quality without boosting its price. 

One answer, says Craig Senovhich, may be robotic technology. Senovich, an engineer by day, opened Half Crown Hill Orchard four years ago in an overgrown field on land that his great-grandfather used to farm vegetables. Read more ..


Edge of Climate Change

Experts Probe Links Between Urban Growth and Climate Change in Africa

April 27th 2009

Africa Topics - Dakar
Dakar

A new project has united researchers exploring the connection between rapid urban growth in Africa and climate related emergencies, in an effort to safeguard vulnerable urban populations from the effects of climate change. 

The Climate Change and Adaptation in Africa program, or CCAA, aims to increase the capacity of African people and organizations to cope with the effects of climate change.

Sponsored by Canada's International Development Research Center and the United Kingdom's Department for International Development, the project hopes to indentify strategies to help the urban poor in Africa's largest cities to adapt to challenges posed by the changing environment, says project manager Francois Gasengayire. Read more ..


Genetic Edge

Chinese Scientists are Able to Grow Eggs in Female Mice

April 20th 2009

Social Topics - Pregnant

Chinese researchers are challenging the notion that a woman has all of her egg cells from birth and will never create new ones. Scientists have produced new female eggs using stem cells, a development scientists say could help infertile women.

Researchers in China say it may be possible one day for women to turn back their biological clocks by repopulating their ovaries with new eggs using stem cells.

In an experiment described in the journal Nature Cell Biology, scientists at Shanghai Jiao Tong University found stem cells in mice ovaries that could be extracted, cultured and injected into sterile mice that then produced healthy offspring.

The research, which now needs to be duplicated in other labs, holds the possibility that women can produce new eggs. According to scientists, that could extend female fertility by resetting a woman's biological clock.

David Albertini, an expert on reproductive sciences at the University of Kansas Medical Center, says the Chinese research shows promise for women who are unable to conceive.

"So the very nature of the experiments in some ways parallels the human condition that many of us are interested in addressing," he said. "That is, 'What would happen to a young woman who lost many of her eggs as a result of cancer treatment, and is there a potential avenue for therapy or retaining that fertility or restoring that fertility that could draw on the power of stem cell technology?'"

But Albertini cautions that more research is needed to determine whether the procedure will work in women. Read more ..


Edge of Disease

Texas Laboratory Tracks Deadly Pathogens Worldwide

April 13th 2009

Science - BioHazard suits

In August 2008, a new national laboratory began operating in Galveston, Texas, just weeks before the area was struck by a devastating hurricane. But the lab fared well, with no damage or disruption to operations. Why? Because it was built to withstand severe storms and more. Security is important at this pivotal installation with the unassuming name of The Galveston National Laboratory because within its walls are samples of the world's most dangerous and deadly pathogens. 

New illnesses constantly appear around the world and are often found to be variations of illnesses already known. But to be sure, samples of the virus or bacteria thought to be causing the illness are sent back to Galveston. They end up in a 52,000 square-meter building--the Galveston National Laboratory--on the campus of the University of Texas Medical Branch. The lab's deputy director, Jim LeDuc says the staff on hand is ready for whatever comes in.

"Our faculty [members] are experts in a number of different diseases-plague and anthrax, virus diseases, common ones like influenza and less common ones that you see around the world like dengue and some of the viral hemorrhagic fevers," he said.

The Galveston laboratory has an in-house collection of most pathogens and works with collaborators around the world to identify and study new diseases. Read more ..


The Automotive Edge

India's Tata Nano Could Change the Mobility of Millions

April 6th 2009

Automotive - Tata Nano
Tata Nano

It's 2 feet shorter than a Mini Cooper, presents an almost cartoonish appearance and weighs less than the four passengers it seats. But for the 350-million-plus middle class of India, the just-launched Tata Nano, the world's cheapest car at $2,000, is a cause for exhilaration. And for the first 100,000 lucky customers drawn via lottery, it's a dream come true.

A century after Henry Ford put America on wheels with the Model T, the affordable Tata Nano is doing the same to the less privileged of the world. What is now dismissed by many as a "toy car" could soon reveal itself to be the mouse that roared, one of the most transformational consumer products of the century.

Roughly 100,000 Indians lose their lives on the road every year, seven times the rate of the developed world. In a country where it is not uncommon to see entire families overflowing a rickshaw or women in saris sitting side-saddle on a bike with small children on their laps, moving one's family from an unsafe bike into a plastic capsule is a sensible $2,000 investment. Read more ..


Approaching Nuclear Energy

Three Mile Island and Chernobyl: What Went Wrong Then and Why Today’s Reactors Are Safe Now

March 30th 2009

Energy Topics - Three Mile Island
Three Mile Island Nuclear complex

We recently observed the 30th anniversary of the partial meltdown of the Three Mile Island (TMI) nuclear reactor. This occasion is a good time to consider the advances in nuclear power safety since that time and discuss the misinformation about this incident and the 1986 nuclear accident in Chernobyl, Ukraine, which is often associated with TMI.

Three Mile Island: What Happened

On March 28, 1979, a cooling circuit pump in the non-nuclear section of Three Mile Island's second station (TMI-2) malfunctioned, causing the reactor's primary coolant to heat and internal pressure to rise. Within seconds, the automated response mechanism thrust control rods into the reactor and shut down the core. An escape valve opened for 10 seconds to vent steam into a pressurizer, as it was supposed to, but it failed to close. Control room operators only saw that a "close" command was sent to the relief valve, but nothing displayed the valve's actual position. With the valve open, too much steam escaped into the pressurizer, sending misinformation to operators that there was too much pressure in the coolant system. Operators then shut down the water pumps to relieve the "pressure." Read more ..


Genetic Edge

Genetic Defects Associated with Sudden Cardiac Death

March 23rd 2009

Media - Tim Russert
Tim Russert Died of Sudden Cardiac Death

You're sitting at your desk and suddenly your heart is beating in overdrive or worse, lurching along like a car on fumes. It is a shocking, uncomfortable and frightening sensation.

Irregular heart rhythms are a common cause of sudden cardiac death or SCD, a condition that accounts for 450,000 deaths annually in the United States. Scientists are now closer to understanding what causes SCD and who it may strike, said Gonçalo Abecasis, associate professor of biostatistics at the University of Michigan School of Public Health in Ann Arbor. Abecasis received his doctorate at Oxford University, having written a dissertation on statistical methods for human gene mapping. The focus of his research at UM is in the identification and characterization of genes determining human variation and disease.

Abecasis was the co-leader of an international study aiming to identify genetic defects associated with sudden cardiac death. Aravinda Chakravarti of Johns Hopkins and Arne Pfeufer of the Institute for Human Genetics in Germany also co-led the study. Serena Sanna, formerly at the U-M School of Public Health and now a researcher at the National Research Center in Cagliari, Italy, was joint first author. Read more ..


Edge of the Sea

Fish Found with Transparent Head

March 16th 2009

Science - Barrel-eye fish

Researchers at the Monterey Bay Aquarium Research Institute have solved the half-century-old mystery of a fish with tubular eyes and a transparent head. Ever since the "barreleye" fish Macropinna microstoma was first described in 1939, marine biologists have known that its tubular eyes are very good at collecting light. However, the eyes were believed to be fixed in place and seemed to provide only a "tunnel-vision" view of whatever was directly above the fish's head.

A new paper by Bruce Robison and Kim Reisenbichler shows that these unusual eyes can rotate within a transparent shield that covers the fish's head. This allows the barreleye to peer up at potential prey or focus forward to see what it is eating.

The barreleye fish, or Macropinna microstoma, has extremely light-sensitive eyes that can rotate within a transparent, fluid-filled shield on its head. The fish's tubular eyes are capped by bright green lenses. The eyes point upward when the fish is looking for food overhead. They point forward when the fish is feeding. The two spots above the fish's mouth are olfactory organs called nares, which are analogous to human nostrils. Read more ..


Edge on Communications

Developing Countries Employ 'Leapfrog Technology' with Cell Phones

March 9th 2009

Asia Topics - Afghani Cell Phone Vendor
Afghani Cell Phone Vendor

Cell phones are an example of what is sometimes now called "leapfrog technology," a product that allows developing nations the benefits of a reliable and extensive communications network without the heavy investment in fixed-line phone infrastructure. Mobile phones, along with Internet access, are part of a communications revolution that is helping boost income and stop the spread of disease in emerging economies.

For example, Abdul Wakil owns a dry goods store in the Afghan village of Daw Koo, about 40 kilometers north of Kabul. He says his cell phone has made all the difference. Read more ..


Inside the Black America

Researchers Find Black Teens Show Little Distress Leading to Suicide

March 3rd 2009

Social Topics - Black Teenage suicide

Suicide rates among black adolescents have been historically low compared with their white counterparts, but the gap has narrowed, according to a new study at the University of Michigan.

Researchers there are taking a closer look at an emerging trend that indicating that black youths at risk of suicide may not show warning signs of their distress. Until this study, nationally representative data regarding non-fatal suicidal behaviors, especially among blacks, had not been available.

UM's survey captured responses from 1,170 African American and Caribbean black teens aged 13 to 17. Overall, researchers estimated that at some point before they reach 17 years of age, 4 percent of black teens, and more than 7 percent of black teen females, will attempt suicide.

Psychiatric disorders, especially anxiety issues, were significant predictors of attempted suicide rates among black youths. Those with at least three disorders were about seven times more likely to report having attempted suicide. Read more ..


Inside the Internet

A Global Internet Meltdown Averted Thanks to Unseen NANOG

February 23rd 2009

Energy / Environment - NANOG members
NANOG members gathering

On Monday February 16, a global meltdown of internet routing was narrowly averted, say some informed observers of information superhighway. Few know the details or understand the dynamics.

Our world today depends on the internet. Email has largely replaced the fax, various forms of instant messaging fill some of the duties once handled by the telephone, and your local bank teller probably doesn't even recognize you at the grocery store thanks to web access to your bank account.

Everyone is acquainted with the misbehaviors at the individual level found within the internet's open, distributed architecture: mailboxes full of spam, phishing attacks aimed at your financial information and spyware are ubiquitous. Less well known are the vulnerabilities to the systems that transport traffic. Yet this backbone issue weighs on the minds of everyone involved in the operation of the internet's core. Read more ..


Genetic Edge

Neanderthal Genome Help Scientists Map Modern DNA

February 16th 2009

Science - Neanderthal

A team of German scientists has completed the first draft of prehistoric genome. Scientists hope an ancient hominid will shed light on the evolution of modern humans.

Researchers at the Max Planck Institute for Evolutionary Biology isolated three billion base pairs, or genetic building blocks, from 38,000-year-old Neanderthal bone fragments of three Croatian fossils. But the genetic blueprint is about 63 percent complete, researchers say, because many of the gene pairs are repeats.

Researchers had to use a special "clean room" to sift the DNA from the bacteria that had accumulated inside the fossils, which geneticists hope will answer questions about the extinct Neanderthals' migration out of Africa to Asia and Europe, where they died out 30,000 years later to be replaced by modern humans.

But there is argument about just how closely humans and Neanderthals are related. While some anthropologists believe Neanderthal was a direct ancestor, others believe the ancient hominid bred with other primates in Europe and Asia, which led to the explosion of modern humans. Read more ..


Iran's Nukes

Iran Launches Jihad into Space

February 9th 2009

Iran - Iranian Space Rocket

The launching of an Iranian satellite into orbit on February 2, said to be for "communications technology" and "earthquake monitoring," would have been a normal news item not exceeding the greater news report about India landing a spacecraft on the moon in December 2008. But according to news agencies around the world, Western chanceries and national security agencies have taken the development "seriously." 

The Associated Press and the BBC described reactions as "nervous." Although the debate about the value of Iranian space technology and commercial rocket capacity usually concludes that the mullah's regime is far from reaching a respectable level, many defense analysts dismiss the issue as about the sole industrialization of the Islamic Republic. In fact it is about the "weaponization" of the satellite.

Obviously this one launch may not be the crossing of the line, but the first step was accomplished and statements were made about the immediate following steps. The growing consensus today is about the strategic intention of Tehran's war room, solidly in the hands of the Pasdaran. Read more ..


The Future of Books

Library of Congress Scans 25,000 Books--Moving from Book Shelf to Cyberspace

February 2nd 2009

Books - Books

The Library of Congress is the largest library in the world, housing millions of books, recordings, photographs, maps and manuscripts. Like many other great research libraries, the Library of Congress has been moving into the digital world.

One way they're doing it is through a scanning project that has so far put 25,000 books online for anyone to read or download.

Doron Weber of the Alfred P. Sloan Foundation, which is funding the $2 million project, stresses the importance of scanning complete books to preserve their cultural context.

"To preserve book knowledge and book culture means preserving every word of every sentence in the right sequence of pages in the right edition, within the appropriate historical, scholarly and bibliographical context. You must respect what you scan and treat it as an organic whole, not just raw bits of slapdash data."

The scanning is being done by the Internet Archive. The San Francisco-based nonprofit group aims to preserve cultural artifacts such as musical recordings and Web pages, as well as books, and make them available online. Brewster Kahle heads the Internet Archive.

"They're going faster and faster and faster here at the Library of Congress to bring the book collection, to digitize those, run them through optical character recognition, offer them for free on the Internet for anyone to download, read, bind, do anything they want with," Kahle said. Read more ..


The Future of Food

Aquaculture Hold the Promise of Sustainability

January 26th 2009

Energy / Environment - Aquaculture

In spite of possible environmental problems, specialists say aquaculture can help spur the recovery of natural populations of fish and other aquatic species - and provide much-needed food and income, especially for small-scale farmers in developing countries.

Aquaculture has been practiced for thousands of years. Jim Diana, a professor of natural resources at the University of Michigan, says the first written textbook on aquaculture was published in China in about 400 B.C.

Asia continues to dominate the farming of fish and other aquatic species, accounting for approximately 92 percent of the world harvest.

"But," says Diana, "there is aquaculture in the United States and virtually every continent other than Antarctica." Read more ..


The Way We Are

Brain Mapping Social Conformity

January 19th 2009

Social Trends - Brain Waves

Decades of research show people tend to go along with the majority view. Now, scientists are supporting those theories with brain images. A new study could explain why people follow fashion trends or join religious groups and even the rise of extreme political movements.

According to researcher Vasily Klucharev of Erasmus University in the Netherlands, the study shows when people hold an opinion differing from others in a group, their brains produce an error signal. 

"If you make an error, if means that something [wrong is going on]. And, whenever we experience an error, it means this error signal pushes us to change behavior," Klucharev said. "And, we see it looks like we quite automatically produce this signal when our opinion is quite different from other people."

Read more ..

Beyond Earth

Methane on Mars Can Mean Life

January 19th 2009

Science - Mars-scape

The U.S. space agency, NASA, says large quantities of methane gas have been detected on Mars, hinting at the possibility of biological or geological activity on the Red Planet.

Astrobiologist Sushil Atreya says there are two possibilities as to why methane exists on Mars. "Either it's geology, in which case it's the reaction between water and rock, or it's biology, in which case the microbes are producing the methane," Atreya said.

Methane was first detected on Mars in 2003 by scientists using Earth-based telescopes. Scientists say that one plume of Martian methane contained nearly 19,000 tons of the gas.

Read more ..

Preserving the Penguins

Conservationists Try to Prevent African Penguin Extinction

January 5th 2009

Energy / Environment - Dyer Island Penguins

Millions of African penguins once roamed the beaches along the continent's southern coast. But their population is collapsing and conservationists have begun drastic measures to prevent the species from going extinct. They are installing artificial nests to help the penguins survive. They are even feeding wild penguins by hand.

Dyer Island, about five miles off the southern tip of Africa, is a key breeding site for the African penguin. But a local charter boat captain, Wilfred Chivell, says the penguins need help.

"You can see it's impossible for any bird to make a nest in this area-boulders upon boulder upon boulder," Chivell said.

Over the years, people removed the topsoil from this island because it was rich in bird droppings and made good fertilizer. As a result, penguins can no longer burrow underground to build nests. They must breed in the open, where chicks are often killed by predators or stormy weather.

Chivell has decided to step in. He is installing small fiberglass igloos for the penguins to use as nests. “Once you've placed the nest there, they decorate," Chivell said. "They put a few extra stones and a few feathers and pieces of the natural vegetation here. So they make it nice and homely for themselves."

The need for artificial nests demonstrates why the African penguin is listed as a vulnerable species by the International Union for the Conservation of Nature. Much of the penguin's natural habitat has been destroyed. As well, commercial fishing fleets have reduced their food supply. Chivell has formed the Dyer Island Conservation Trust to install 800 nests at this site. Read more ..


The Race for Hydrogen

Industrial Hydrogen Pipelines Get a Boost from Lamination

December 29th 2008

Energy / Environment - Energy

The infrastructure and technology exists today to begin using hydrogen as a fuel. This will involve the proliferation of onsite hydrogen production using electrolysis or reformation from natural gas as well as neighborhood stations.

We have a sprawling, million mile natural gas pipeline network but only seven hundred miles of hydrogen pipeline, primarily serving high volume users such as Gulf Coast region refineries. In addition to the short pipelines serving high volume users, we ship tanks of hydrogen in either compressed or liquefied form. This is acceptable if you need hydrogen for some chemical manufacturing process, but it's a poor way to transport energy. The liquefaction process alone eats up 30% of the energy value of any hydrogen transported in this fashion.
But thanks to recent innovations, that hydrogen pipeline network could spread.

Early attempts to integrate hydrogen into existing pipelines tests supplementing natural gas with up to 20% hydrogen. This worked well for combustion but not for transport. Pipeline welds that easily stopped the larger natural gas molecules were quite willing to let hydrogen slip through, resulting in losses and the potential for fires and explosions where the gas accumulated.

Plastics and metals had long been used for piping, but plastics are permeable to hydrogen and metals are subject to hydrogen embrittlement as well as being permeable. Hydrogen molecules are a pair of atoms, and they pass through plastics still joined together. When presented with a metal barrier, the hydrogen atoms must dissociate, pass through the metal as individual atoms, and then find a partner again on the other side of the barrier. Read more ..


Genetic Edge

Genetic Engineering Limits—A Planet Responds

December 22nd 2008

Science - Mouse in Beaker

Over the past half century, the world has been transformed through rapid developments in communications, transportation, weaponry, and trade. A vast infrastructure of intergovernmental institutions has been established to help ensure that these and related developments generate more benefit than they do harm. These include global institutions such as the United Nations and the World Bank, regional groups such as the European Union and the African Union, and those with issue-specific agendas such as the Intergovernmental Panel on Climate Change and the World Health Organization. Although the record of these institutions is far from perfect, a world without them would be fraught with even more risk than it is today.

The rapid development of powerful new human biotechnologies raises precisely the sort of questions that such intergovernmental institutions are positioned to address. If developed wisely, these technologies could help prevent and cure diseases that have afflicted humanity for millennia; if misapplied, they could pose new and profoundly consequential risks. Detailed knowledge of the human genome might lead to improved medical diagnostics, but could also lead to a Gattaca-like world in which affluent couples genetically modify their embryos in an attempt to create “designer babies.” The creation of clonal human embryos gives researchers tools to help investigate the developmental origin of congenital diseases, but brings us closer to the day when rogue scientists might attempt to create live-born human clones. Genetic interventions intended to help those suffering from degenerative muscular diseases could be used by athletes to illicitly enhance their strength and endurance. Read more ..


Edge on Autism

Autism's Mysterious Increase

December 15th 2008

Health/Medicine - Autism

Impaired social function, repetitive motion, circumscribed interests—these are common themes in a group of complex developmental disabilities known as Autism Spectrum Disorders or ASD.

Individuals with ASD refer to themselves as being “on the spectrum” as they exhibit symptoms, characteristics, and function spanning the wide range from being unable to communicate or care for themselves, to managing to fit into society despite their quirks.

Although recognizable in historical writings, autism is still a relatively recent diagnosis. New collections of behaviors and deficits are being recognized as part of the autism spectrum. The initial characterization of Asperger's Syndrome (one of three forms of ASD) occurred in 1944, and work continues on sensory integration disorder, and on the catch-all pervasive developmental disorder. Read more ..


Genetic Edge

The Spitterati And Trickle-Down Genomics

December 8th 2008

Science - DNA Strands

Just before the world's financial system hit the skids, the New Yorker's Talk of the Town and the New York Times' Sunday Styles section both featured lengthy accounts of a celebrity "spit party," at which notables in cocktail attire ejected their saliva into test tubes.

The chic gala, hosted by media moguls Barry Diller, Rupert Murdoch, and Harvey Weinstein, was the latest episode of a remarkable publicity push by 23andMe, the start-up biotech firm whose mission is "to be the world's trusted source of personal genetic information." The Google-backed company launched its celebrity strategy this past January, when it distributed a thousand free spit kits at the elite World Economic Forum in Davos, Switzerland. But the genomes of the rich and famous were just the first step. Early this fall, 23andMe announced that it's slashing its prices to Christmas-stocking levels, in a bid to make DNA tests this year's high-tech must-have. Read more ..


The Edge of Disease

Nigeria Immunizing 30 Million Children Despite Muslim Protests Of U.S. "Depopulation Conspiracy"

December 1st 2008

Nigeria Polio vaccination

Despite the vehement protests of Muslim clerics, some 30 million children in Nigeria are to be vaccinated against polio and measles during an integrated immunization campaign set to begin immediately in Nigeria’s northern states.

For five days 200,000 health workers will be stationed at 33,000 schools throughout northern Nigeria to administer oral polio drops and measles vaccines to millions of children under the age of five in a new drive to eradicate the two diseases. The innoculation drive is beign spearheaded by the country's health ministry, with financial and technical support from UNICEF, the World Health Organization and other partners. But the campaign is proceeding despite vehement protests by radical Islamists.

Polio cases have more than doubled this year in Nigeria as health officials struggle to fight various natural strains of the virus as well as outbreaks set off by the polio vaccine itself three years ago. Kano, in northern Nigeria, has been the epicenter for the transmission of the crippling polio virus to other parts of the world since 2003 when the authorities suspended polio immunization for 13 months. That suspension followed claims by radical Muslim clerics and some medical doctors that the vaccine was laced with substances that could render girls infertile as part of a U.S.-led Western plot to depopulate Africa. Read more ..


Genetic Edge

The Quest for Global Consensus on Human Biotechnology

November 24th 2008

Science - Mouse in Beaker

The newest human biotechnologies have the potential for both great good and great harm. If used responsibly they could lead to medical advances and improved health outcomes. If misapplied they could exacerbate health disparities and generate new forms of discrimination and inequality. If we are to realize their benefits yet avoid their risks we will need regulations, laws, and guidelines at both national and international levels.

But how and where should the lines be drawn? If drawn too tightly they could constrain valuable medical research. If drawn too loosely they could open the door to a Gattaca-like world of neo-eugenic practices and ideologies.

In the United States, serious discussion of these questions has been thwarted for the past eight years by partisanship and polarization, and constructive engagement by the Bush administration at the international level has been effectively nil. The good news, however, is that during this same period many countries have been developing comprehensive human biotech policies that strike a practicable and socially responsible balance between being overly restrictive and overly permissive.

A survey of 192 countries and eight major intergovernmental organizations suggests that:

  • There is widespread support for human embryonic stem cell research involving embryos created but not used in the course of assisted reproductive technology (ART) procedures.
  • There is similarly widespread support for embryo screening to avoid passing serious diseases to one's offspring.
  • There is strong opposition to human reproductive cloning, inheritable genetic modification, and embryo screening for non-medical purposes.
  • There is widespread concern about the commercialization of human reproductive activities and about the use of genetic technologies for so-called "enhancement" purposes
Read more ..

The Water’s Edge

Municipal Water Stresses Abundant As the Levels Shrink

November 17th 2008

Science - Low Water

 The United States has always been two separate countries when it comes to water. The east has riparian water rights like those of England, while the west has right of prior appropriation which has descended to us through Spanish laws modified for use in the arid southwest.

Riparian rights permit a variety of uses for water found on, under, or flowing next to a property. The rights can't be sold or transferred except to an adjacent piece of land, the water may not be transferred out of the watershed, and the use must be reasonable. Unfortunately what was reasonable in a high precipitation year may not be in a dry year, and reasonableness is not precisely defined but instead depends upon the views of the others who have right to the water. Read more ..


The Edge of Wind

Arctic Ammonia Production Might Produce Energy and Stem Ice Loss from Global Warming

November 10th 2008

Energy / Environment - Polar Bear

The last three years have seen a mad scramble in the Arctic with undersea mapping of continental surface features and a Russian submarine placing a flag on the ocean floor at the North Pole—all efforts to claim potential fossil fuel resources beneath the sea bed.

But another vision, by independent researcher Dr. Homer Wang, is far different, allowing not only the production of energy but also the simultaneous correction of arctic ice loss.

Wind speeds of 7.5 meters per second in the continental United States can be promptly developed for the four hundred to five hundred watts per square meter available. But Arctic winds are twice as fast. Because wind energy increases with the cube of speed, harnessing winds in a Arctic meter can yield three to four thousand watts. The question is how?

Today's largest wind turbines, built by Enercon, offer hubs that stand a hundred and forty meters above the landscape and sweep an area of twelve thousand square meters. Such a device would not work on an oceangoing plantship facing arctic winds. Instead, it would act as a gigantic lever, capsizing even a large vessel. Arctic wind must be harvested with vertical axis wind turbines. Read more ..


The Race for Hydrogen

Ocean Thermals Can Produce Green Hydrogen

November 3rd 2008

Energy / Environment - Ocean scene

Many have heard the phrase "The Hydrogen Economy" and it stirred hopes, but reality is not so rosy.

The hydrogen molecule, just a pair of electrons and protons, misbehaves in all sorts of ways.

Its tiny size allows it to slip past tank and pipeline seals, when under pressure it embrittles metals just like the loose neutrons from a nuclear reactor, and it can explode or cause a flash fire across a wide range of conditions.

Hydrogen doesn't even qualify as an energy source as it's not found in its free form anywhere on Earth—for us it's just an energy carrier. Every bit we have we've made by either stripping it from fossil fuels or by cracking water using electricity. The only way hydrogen qualifies as “clean” is if it's made with electricity that came from a renewable source. Sometimes this is called “green hydrogen” versus “brown hydrogen.” Read more ..


Terrorism on the Internet

Hamas's AqsaTube in Cat and Mouse with Israeli Intelligence

October 27th 2008

Terrorism - AqsaTube

An Israeli intelligence think-tank and a Hamas video Web site seem to be playing a game of cat-and-mouse with each other.

Last week the Intelligence Terrorism Information Center, a Ramat Hasharon-based research center closely associated with Israel's Shin Bet and Military Intelligence, released a report detailing the establishment by Hamas of AqsaTube, a video-sharing web platform closely modeled on the popular YouTube, but filled with videos praising suicide martyrdom and showing how to build bombs and carry out attacks.

Following publication of the story in The Jerusalem Post, Google removed its AdSense program from the Hamas Web site, and one day later, AqsaTube's French Internet Service Provider OVH took the Islamist site off-line. But within days, AqsaTube was back up, bigger and more brazen than before.

The Hamas site obtained a new service provider, a new logo, brand new videos and some new ads. The graphic design of the site underwent a number of changes. The original logo, whose color was almost identical with that of YouTube, was now yellow and gray and bore its name in Arabic and a picture of the Aksa Mosque. The site was still registered to Abu Nasser Skandar, from Dubai. Read more ..


Feeding the Planet

Wheat, Fertilizer, Ammonia and Land Realities Threaten Global Food Supply

October 20th 2008

Farming - wheat fields
Wheat fields

Farming has changed dramatically in the last century. The horse as a source of power, the cow as a source of fertilizer, and triennial mix of corn, alfalfa or soy, and letting the land lay fallow is gone.

Today on the fertile lands of Iowa, Illinois, and Nebraska--our precious midwest farmbelt--the biennial dance of corn and soy is giving way to economic pressure from ethanol and advancing technology. Unthinkable even five years ago, today "corn on corn" is the norm.

Things are changing in equally dramatic ways in the drylands of the Dakotas, but the trend runs opposite to that seen in the wetter, richer lands to the east. Skyrocketing ammonia prices and limited moisture are driving lands out of annual wheat production and into a biennial rotation of fallow and wheat production.

This sounds like something only an agronomist could love, but the reality of the matter is that lives are on the line eighteen months from now based on the decisions farmers are making today. Read more ..


The Edge of Wind

Freeing the Wind

October 13th 2008

Energy / Environment - Wind Farm

 If you've done any reading at all on renewable energy, you'll have heard the marvelous phrase "The U.S. is the Saudi Arabia of wind." Like the Saudi Arabian oil, lying almost entirely under their country's Empty Quarter, the wind resources of the United States are found in our Empty Quarter—the plains from north Texas up through the Dakotas.

When natural gas exists in small pools or in oil field caps with too little volume to be economically exploited it is referred to as stranded gas. When wind resources exist in areas without the transmission lines required to send their power somewhere else and without local consumers to use them they are said to be stranded as well. Read more ..


Tracking Electric Cars

First Mass-Upfitted Electric Car Hits New Zealand

October 6th 2008

Energy / Environment - Getz
Upfitted Hyundai Electric Blade Getz

Mass upfitting has come to New Zealand. South Korean Hyundai has introduced the first mass-upfitted electric car, the Getz. It will be on the streets of New Zealand within weeks. The Getz employs household recharging utilizing the same plug that powers electric shavers, cell phones and laptops. Charging costs about $2.00 per 100 km—not much more than running a toaster.

Mass upfitting—the new term for retrofitting—is the mechanism for moving a large number of new or existing gas and diesel vehicles to a non-oil fuel source. New Zealand is the first country worldwide to undertake this process on such a national scale. Edwin Black, author of The Plan: How to Rescue Society the Day the Oil Stops--or the Day Before, said, “New Zealand’s action is significant. It is proactively adopting one of the keys provisions for getting the country off oil.”

David Crawford, general manager land transport environment and safety for New Zealand’s Ministry of Transport supports Hyundai's emission-free electric cars. "The ministry sees it as an important first step towards…the Government's target to become one of the first countries in the world to widely use electric vehicles," he said.

New Zealand’s Energy Strategy sets its goal at electric cars being 5 per cent of market share by 2020 and 60% by 2040. While those target percentages may seem almost tokenistic in view of the 500 million gas consuming vehicles expected by 2030, Black commended the concept. “Mass upfitting is essential to post-oil survival. New Zealand has quietly taken a leadership role in this regard.” Read more ..


Edge on Alternative Fuels

Ammonia Fuel—The Other Hydrogen Future

September 29th 2008

Energy / Environment - Ammonia-fueled Bus, Belgium, 1943
Ammonia-fueled bus, Belgium, 1943
Courtesy: Ammonia Fuel Network

America’s approach to the transformational challenge of Peak Oil has resembled nothing so much as a Keystone Kops two-reeler. Not since Jimmy Carter has an administration demonstrated a commitment commensurate to the challenge, perhaps because President Carter was sent packing back to Georgia with his cardigans after an attempt to rouse Americans from their blissful dreams of a future where Exxon and Mobil would ensure that no one would have to line up for gasoline ever again. Thirty years later, we are just one Category Four hurricane in the wrong place or a Strait of Hormuz terrorist attack away from waiting in long lines to buy fuel we can no longer afford for the SUVs we no longer love. Recent events in Nashville suggest that even imagined shortages will have the same results. We need a rational approach to energy transition, and nothing exemplifies the lack of a comprehensive energy policy as much as the magical-time-machine thinking involved in the promise of a "hydrogen future." Read more ..


Edge on Health

Snoring A Risk But Only for the Young

September 22nd 2008

Science - Snore Away

Now you can let your old Grandpa or Grandma snore—if it doesn't bother anybody else—according to new sleep research at the Technion-Israel Institute of Technology's Medical Faculty. Prof. Peretz Lavie reported at the European Sleep Research Society in Glasgow last week that snoring is a health risk in young and middle-aged people, but surprisingly not in the elderly.

About five percent of women and 10 percent of men in the general population, especially the overweight, snore. This has been thought to be an important high-risk mortality factor in all people with sleep apnea (a momentary cessation of breathing hundreds of times per night) and heart disease. Sleep apnea, which causes snoring, is more common in men and in the elderly than in women and younger people.

But Lavie, one of the country's leading sleep medicine experts and his fellow researcher and wife, Dr. Lena Lavie, found that sleep apnea in the old is not necessarily accompanied by a higher risk of death. He compared death rates from cardiovascular disease among people according to their age, gender, and ethnic background. Read more ..


Tracking Electric Cars

Sizzling Future Electric Car Market Attracts Middle East Investment

September 15th 2008

Energy / Environment - Fisker EV
Fisker-Karma EV

The hot new ticket for the investment community is electric vehicles, from mass-market hybrids like the Toyota Prius to plug-ins hybrids (PHEVs) like the Volt to pure electric vehicles (EVs) like the Tesla Roadsters.

In 2007, about 500,000 HEVs were sold worldwide. PHEVs entry into the market in 2010 is projected to increase the total light electric vehicle to three million units by 2012. That means there is green to made in the green car field. Whenever investments are tallied, Middle East money flows. The same has now occurred for electric vehicle market. Read more ..


Environmental Awareness

Heavy Air Pollution Reduces Rainfall, Scientists Find

September 8th 2008

Energy / Environment - Smog and Pollution3

A certain number of aerosol particles in the air increases rainfall, but an overabundance of them retards it, according to new research by a group of international scientists, led by Prof. Daniel Rosenfeld of the Institute of Earth Sciences at the Hebrew University of Jerusalem.

The team developed a model that shows how particles in the air influence cloud formation and rain. The findings were published Friday in the latest issue of the journal Science. Tiny floating particles, known as aerosols, significantly influence cloud formation. While they occur naturally, they are also produced through human action. As pollution rises, the aerosol particles produced can tip the natural balance. Read more ..


Internet Edge

Comcast Cap on Internet Downloads Signals Beginning of the End of “Free Internet”

September 1st 2008

Technology - Computer User

Internet analysts are pointing to the recent Comcast cap on the most active Internet downloaders as foreshadowing the beginning of the end of the "free Internet."

Comcast, a major Internet provider, set off the alarm when it announced it would limit the broadband usage of that small segment of its customer base with a record of the largest downloads.

Commencing October 1, Comcast will slap a 250 gigabyte-a-month cap on its residential users. Comcast states that 250 gigabytes is about 100 times the average residential usage. Typically, customers use two to three gigabytes monthly, a spokeswoman explained, adding that less than 1 percent of all residential customers exceed that level.

Comcast and other companies have long considered restricting their most active users, claiming the limits were necessary to ensure fair access to the network for all users. While the policy appears to target download abusers and excessive users, that is precisely the avenue providers such as Comcast are expected to take as they incrementally broaden the restrictions. Observers compare the restrictions to that seen in the telephonic world with Directory Assistance.

First the free service was subject to a cap, then the cap became progressively more restrictive and now all Directory Assistance calls are expensive fee-for calls.Internet usage is constantly evolving as the Internet and the technology itself evolves. Web analysts argue that an "Internet year" is just 90 calendar days. Cisco reminded in report on usage last winter that "today’s ‘bandwidth hog’ is tomorrow’s average user." Read more ..



See Earlier Stories 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44

Copyright © 2007-2017The Cutting Edge News About Us