Category Archives: Science

Wireless Power

Wireless energy could power consumer, industrial electronics

Soljacic realized that the close-range induction taking place inside a transformer–or something similar to it–could potentially transfer energy over longer distances, say, from one end of a room to the other. Instead of irradiating the environment with electromagnetic waves, a power transmitter would fill the space around it with a “non-radiative” electromagnetic field. Energy would only be picked up by gadgets specially designed to “resonate” with the field. Most of the energy not picked up by a receiver would be reabsorbed by the emitter.

How flowering plants beat the competition

How flowering plants beat out the competition on ancient earth:

as the world headed into a cooler, drier climate around 250 million years ago, the early seed-bearing plants had a distinct advantage over their simpler, spore-releasing relatives that then flourished in moist, warm swamps.

Seed-bearing plants also figured out better ways to get around. Some seeds sprout improbably elaborate barbs in order to snag a lift on passing animals. A significant number hitch a ride by growing a morsel called a elaiosome that entices ants to carry them off a few feet. Other seeds are textured or buoyant, so they can float away on wind or water.

The human appetite for seeds has resulted in new forms of dispersal as well. Thousands of years ago, people began collecting and cultivating nutrient-rich seeds, like corn, lentils, and oats, for food.

Nanoscale Images Using an X-ray Laser

Scientists capture nanoscale images with short and intense X-ray laser

Using the free-electron laser at Deutsches Elektronen-Synchrotron (DESY) in Hamburg, Livermore scientists, as part of an international collaboration led by LLNL’s Henry Chapman and Janos Hajdu of Uppsala University, were able to record a single diffraction pattern of a nanostructured object before the laser destroyed the sample. A Livermore-developed computer algorithm was then used to recreate an image of the object based on the recorded diffraction pattern. This “lensless” imaging technique could be applied to atomic-resolution imaging because it is not limited by the need to build a high-resolution lens. The flash images could resolve features 50 nanometers in size, which is about 10 times smaller than what is achievable with an optical microscope.

Nanotechnology Research

Brave nano world by Nate Birt:

At the federal level, the National Nanotechnology Initiative has requested more than $1 billion for nanotechnology research and development in 2007. The initiative is a network of 25 federal organizations, including the Environmental Protection Agency and the Department of Defense, that fund nanotechnology research at their own labs and at universities around the country, including MU.

Former President Bill Clinton started the initiative in 2000, and it became a part of the federal budget in fiscal 2001. Back then, the federal government spent an estimated $464 million on nanotechnology

Science and Engineering Graduate Data from NSF

NSF presents a large amount of data on the Characteristics of Recent S&E Graduates: 2003. The data covers undergraduates and graduates in 2001 and 2002. The report shows 937,700 bachelor’s graduates (*682,200 in science fields; 112,300 in engineering; and 143,300 in health care). And 246,700 master’s graduates (117,000 science; 47,000 engineering; 82,700 health).

Median 2003 salary for 2001 and 2002 bachelor’s graduates:

all science: $32,000
all engineering: $50,000

Some of the specific areas median salaries: computer and information sciences $60,000; electrical/computer engineering $70,000 and industrial engineering $70,000.

2003 median salaries for 2001 and 2002 masters graduates:

all science: $45,000
all engineering: $65,000

* the report totals do not exactly add do to rounding estimates by NSF.

Old Viruses Resurrected Through DNA

Old Viruses Resurrected Through DNA by Carl Zimmer:

About 100,000 segments of human DNA are remarkably similar to retroviruses, a class of viruses that includes HIV. Retroviruses insert a copy of their genes into the genome of their host cell. Scientists estimate that 8 percent of the human genome is made up of this viral DNA, known as human endogenous retroviruses, or HERVs.

Microbe Food

Microbes May Use Chemicals to Compete for Food

Microbes may compete with large animal scavengers by producing repugnant chemicals that deter higher species from consuming valuable food resources—such as decaying meat, seeds and fruit, a new study suggests.
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Hay hopes the research will make ecologists think more critically about the broad role of microbes in the ecosystem. Microbes are often omitted or relegated to a minor role in food web diagrams, but they should be depicted as direct competitors with larger animals, he said.

Regular Exercise Reduces Fatigue

Regular Exercise Plays A Consistent And Significant Role In Reducing Fatigue:

Health professionals encourage regular exercise to prevent or improve symptoms of conditions such as diabetes, heart disease and obesity, but the scientific evidence on whether exercise increases or reduces fatigue had never been reviewed quantitatively. O’Connor, kinesiology professor Rod Dishman and lead author Tim Puetz, who recently completed his doctoral work at UGA, analyzed 70 randomized, controlled trials that enrolled a total of 6,807 subjects. They found strong support for the role of exercise in reducing fatigue.

For myself this seems true. But what seems true for me doesn’t mean much.
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Sea Urchin Genome

Sea Urchin photo

Sea Urchin Genome Reveals Striking Similarities to Humans by Stefan Lovgren, National Geographic News:

The scientists identified more than 23,000 genes in the 814 million base pairs, or “letters,” of DNA code taken from the sea urchin.

The sea urchin represents the first sequenced genome from the echinoderms, which are the closest known relatives of the chordates, the group that includes vertebrates, animals with spinal columns. The genome includes analogs to many essential human genes that were previously thought to be exclusive to vertebrates.
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The eyeless sea urchin also has genes associated with taste, smell, hearing, balance—and surprisingly, even vision.

How Our Brain Resolves Sight

Brain Pathway Brings Order to Visual Chaos

The world you see around you appears perfectly stationary, even though your eyes dart back and forth two to three times every second in little hops called saccades. For more than a century researchers have assumed that the brain must keep track of the impulses that cause these tiny motions, so as to subtract their effect from our visual awareness. Now researchers have identified a circuit in the monkey brain that seems to play this role.