Author Archives: curiouscat

Ozone Pollution Taking Toll on American Lives

Ozone Pollution Taking Toll on American Lives by Amanda Gardner

Thousands of Americans are dying each year from lung disease caused by atmospheric ozone, a new study finds.

The greatest risk may for those living be in hot, dry cities such as Los Angeles, which has one of the highest concentrations of ozone. Residents of Los Angeles may face a 25 percent to 30 percent higher annual risk of dying from a respiratory ailment versus people in low-ozone areas such as the Great Plains, the researchers said.
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An estimated 240,000 people in the United States and 7.7 million people worldwide die of respiratory disease each year, according to data from the World Health Organization. Efforts to reduce ground-level ozone have stalled in recent years, Jarrett said, and now one in three Americans lives in an area that exceeds the national standard for ozone levels.
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Ozone is also a powerful greenhouse gas, Jerrett said, so measures to improve health might have the added benefit of slowing climate change.

FreeWave’s Data Radios Bring Employee Bonuses

It is easy with the existing economic news to think things are bleak everywhere. But even within the current climate companies find success. Founded in 1993, FreeWave Technologies is a world leader in the innovative design and manufacture of ISM Band radios and wireless data solutions. Their data-transmitting radios span the globe from the Middle East to Mount Everest; from the Amazon Rainforest to Antarctica to New York. They are used by defense contractors, oil and gas companies, city and county municipalities and industrial manufacturers.

Hedy Lamarr from the trailer for the film Boom Town, 1940

FreeWave’s data radios are based on Frequency Hopping Spread Spectrum Technology. Spread Spectrum was originally created for the U.S. Navy during World War II to prevent the Germans from “jamming” American radio transmissions for radio-guided torpedoes. The technology was invented by Hedy Lamar, a famous movie star of the 1940’s. The original radios contained a roll of paper slotted like a player piano to cause channel switching. Hedy’s close friend, Inventor/Musician George Antheil, designed the first successful synchronization device that brought Hedy’s idea to fruition. In 1941, Hedy and George were granted a U.S. patent for the first “Secret Communications System.” The original system used merely 88 frequencies. Today, the switching is controlled in embedded firmware code that enables a radio to change frequencies hundreds of times per second and use more than 100 channels.

Engineering these radios is something the company takes quite seriously. And hiring the best talent is part of this philosophy. Every single employee considers it his/her job to ensure that customers receive top-notch service seven days a week. This extends all the way through the organization up to senior management. FreeWave is so dedicated to making its customers front and center that it provides 24-hour technical support – even rotating senior management to be on call at nights and on the weekends.

The privately held company is based in Boulder, Colorado, the company offers network design, pre-installation engineering services and manufactures its own radios (manufacturing them in Boulder).

FreeWave’s increase in revenues of 112 percent from 2003 to 2007. The company has paid this bonus every six months since the first one was paid in July 1995. Over the past year, FreeWave has invested in expanding its facility to accommodate more staff; growing its manufacturing space and capabilities; dedicating more resources and technology to its product development; increasing its customer and partner training; and, investing in marketing and sales.
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Very Cool Wearable Computing Gadget from MIT

Pattie Maes presentation at TED shows a very cool prototype for wearable, useful computing spearheaded by Pranav Mistry (who received a standing ovation at TED). It’s a wearable device with a projector that paves the way for profound interaction with our environment.

The prototype of the system cost only $350. The software, created by them, obviously is the key, but how amazing is that, $350 for the hardware used in the prototype! There is a useful web site on the Sixth Sense project.

The SixthSense prototype is comprised of a pocket projector, a mirror and a camera. The hardware components are coupled in a pendant like mobile wearable device. Both the projector and the camera are connected to the mobile computing device in the user’s pocket. The projector projects visual information enabling surfaces, walls and physical objects around us to be used as interfaces; while the camera recognizes and tracks user’s hand gestures and physical objects using computer-vision based techniques.

The software program processes the video stream data captured by the camera and tracks the locations of the colored markers (visual tracking fiducials) at the tip of the user’s fingers using simple computer-vision techniques. The movements and arrangements of these fiducials are interpreted into gestures that act as interaction instructions for the projected application interfaces. The maximum number of tracked fingers is only constrained by the number of unique fiducials, thus SixthSense also supports multi-touch and multi-user interaction.

Scientists Target Bacteria Where They Live

Scientists Learning to Target Bacteria Where They Live

Scientists have learned that bacteria that are vulnerable when floating around as individual cells in what is known as their “planktonic state” are much tougher to combat once they get established in a suitable place — whether the hull of a ship or inside the lungs — and come together in tightly bound biofilms. In that state, they can activate mechanisms like tiny pumps to expel antibiotics, share genes that confer protection against drugs, slow down their metabolism or become dormant, making them harder to kill.

The answer, say researchers, is to find substances that will break up biofilms.
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Melander said “a throwaway sentence in an obscure journal” — the Bulletin of the Chemical Society of Japan — gave them another clue. They isolated a compound from the sponge that disperses biofilms and figured out how to synthesize it quickly and cheaply.
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But dispersing biofilms without understanding all the ramifications could be a “double-edged sword,” Romeo warned, because some bacteria in a biofilm could wreak worse havoc once they disperse.

“Simply inducing biofilm dispersion without understanding exactly how it will impact the bacterium and host could be very dangerous, as it might lead to spread of a more damaging acute infection,” he said.

First Flowers of Spring

The first flowers of Spring in my yard.

Eric Schmidt on Google, Education and Economics

Eric Schmidt, March 6th, 2009 interview by Charlie Rose:

“From our perspective, I think the YouTube acquisition and the Doubleclick acquisition, which are the two large acquisitions we did last year, and the year before, have been phenomenally successful.”
He also mentioned the idea of teachers today creating online hubs of information on educational areas, as well as lesson plans. See our Education Resources for Science and Engineering
And Flu Trends
“We needed the stimulus package, because the stimulus package had, among other things, $20 billion for science and education funding… Real wealth is created by businesses, not by financial engineering, and by businesses that provide new products that solve new problems.”
Why do you assume the best students in the world are going to come to America? “Because they choose to come here right now… That is a brilliant [actually not brilliant at all] strategy take the best people hire them in American universities and then kick them out” It happens. “Its shocking.” It happens. “I know we are fighting against it.” “We America remain, by far the place of choice for education, particularly higher education.“
Technologists as a group tend to be more analytical, more data driven, more personally liberal (more willing to tolerate the differences among people, more global in their focus… [technologists] as a group believe you can literally change the world from technology.”

Presidential Memo to Insulate Science From Politics

When President Obama lifts restrictions on funding for human embryonic stem cell research Monday, he will also issue a presidential memorandum aimed at insulating scientific decisions across the federal government from political influence, officials said today.

“The president believes that it’s particularly important to sign this memorandum so that we can put science and technology back at the heart of pursuing a broad range of national goals,” said Melody Barnes, director of Obama’s Domestic Policy Council.

While officials would not go into details, the memorandum will order the Office of Science and Technology Policy (OSTP) to “assure a number of effective standards and practices that will help our society feel that we have the highest-quality individuals carrying out scientific jobs and that information is shared with the public,” said Harold Varmus, who co-chairs Obama’s Council of Advisors on Science and Technology.

The decision by President George W. Bush to restrict funding for stem cell research was seen by critics as part of a pattern of allowing political ideology to influence scientific decisions, affecting issues including whether to approve the morning-after pill Plan B for over-the-counter sales and climate change.

Resurrection of the Human IRGM Gene

Interesting open access paper on Death and Resurrection of the Human IRGM Gene. Author summary:

The IRG gene family plays an important role in defense against intracellular bacteria, and genome-wide association studies have implicated structural variants of the single-copy human IRGM locus as a risk factor for Crohn’s disease. We reconstruct the evolutionary history of this region among primates and show that the ancestral tandem gene family contracted to a single pseudogene within the ancestral lineage of apes and monkeys.

Phylogenetic analyses support a model where the gene has been “dead” for at least 25 million years of human primate evolution but whose ORF became restored in all human and great ape lineages. We suggest that the rebirth or restoration of the gene coincided with the insertion of an endogenous retrovirus, which now serves as the functional promoter driving human gene expression. We suggest that either the gene is not functional in humans or this represents one of the first documented examples of gene death and rebirth.

Electrolyzed Water Replacing Toxic Cleaning Substances

Simple elixir called a ‘miracle liquid’

The stuff is a simple mixture of table salt and tap water whose ions have been scrambled with an electric current. Researchers have dubbed it electrolyzed water
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Used as a sanitizer for decades in Russia and Japan, it’s slowly winning acceptance in the United States. A New York poultry processor uses it to kill salmonella on chicken carcasses. Minnesota grocery clerks spray sticky conveyors in the checkout lanes. Michigan jailers mop with electrolyzed water to keep potentially lethal cleaners out of the hands of inmates.

In Santa Monica, the once-skeptical Sheraton housekeeping staff has ditched skin-chapping bleach and pungent ammonia for spray bottles filled with electrolyzed water to clean toilets and sinks. “I didn’t believe in it at first because it didn’t have foam or any scent,” said housekeeper Flor Corona. “But I can tell you it works. My rooms are clean.”
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It turns out that zapping salt water with low-voltage electricity creates a couple of powerful yet nontoxic cleaning agents. Sodium ions are converted into sodium hydroxide, an alkaline liquid that cleans and degreases like detergent, but without the scrubbing bubbles. Chloride ions become hypochlorous acid, a potent disinfectant known as acid water.

“It’s 10 times more effective than bleach in killing bacteria,” said Yen-Con Hung, a professor of food science at the University of Georgia-Griffin, who has been researching electrolyzed water for more than a decade. “And it’s safe.”

There are drawbacks. Electrolyzed water loses its potency fairly quickly, so it can’t be stored long. Machines are pricey and geared mainly for industrial use. The process also needs to be monitored frequently for the right strength.

Very cool use of science: providing a green cleaning agent that is effective.

Darwin’s Jellyfishes

Palau’s marine-lake jellyfish actually diverged very quickly from their common ancestor, the spotted jellyfish. Like other jellyfish, the spotted jellies are cnidarians, a scientific grouping that includes reef-building corals. The spotted jellyfish drift in Palau’s lagoon, zapping the occasional zooplankton with their stinging nettles and absorbing the sugary by-products of photosynthesizing algae living in their tissues.

Like many jelly species, the spotted jellyfish has a multi-stage life cycle. Adult males and females with the familiar bell-shaped bodies are called medusae, but you would not recognize very young jellyfish as jellyfish at all. After medusae release eggs and sperm into the water, fertilized eggs hatch as larvae that drift for a few days before attaching to solid objects, such as rocks. The larvae morph into polyps resembling tiny anemones. Polyps can bud off into more polyps or, when conditions are right, into new young medusae.
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the jellyfish do not “eat” algae. Like their lagoon ancestors, the jellyfish simply absorb their algae’s photosynthetic leftovers. The jellies get about three-fourths of their energy from algal excretions and the remainder from prey. In essence, the jellyfish are landlords that hunt a bit on the side.

The jellyfish-algae partnership did not originate in the lakes, either. Ancestral spotted jellyfish brought the arrangement with them. “Spotted jellyfish in the lagoon have basic behaviors that help ‘sun’ their algae,” Martin explains. “They move eastward in the morning. The lake jellies have adapted this migration to each individual lake. The most spectacular migration is in Jellyfish Lake.”

The jellies’ migration delicately balances time in the sun (to benefit their algae) and predator avoidance. The gelatinous masses of peanut-shaped Jellyfish Lake begin their day in the western basin. As the sun rises they pulsate eastward toward the rising sun—but not too far east, because the lakeshore is covered with jellyfish-eating anemones. The jellies stop swimming east when they hit the shade cast by mangrove trees lining the shore.
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At nightfall the jellies switch to a vertical migration. Jellyfish Lake reaches depths of 100 feet, but only the top 45 feet contain oxygen. The bottom is a toxic vat of hydrogen sulfide. Bacteria do a brisk business at the interface, metabolizing both the oxygen above and hydrogen sulfide below. Every night the jellies bob up and down from the surface to the bacterial layer. Besides helping the jellyfish stay in place, dipping down treats the jellies’ algae to a midnight snack of nutrients excreted by the microbial masses.

Very Cool.