Category Archives: Science

Broken Window Theory Bolstered with Experiments

The broken window theory is that as the visible deterioration of an area (broken windows, graffiti, lettering…) takes place, crime will increase. And that this starts a cycle of decline for the area feeds upon itself (a negatively reinforcing loop in system thinking parlance). The theory was put forth in an article in The Atlantic in 1982 by George L. Kelling and James Q. Wilson.

Criminology Can the can, The Economist

Kees Keizer and his colleagues at the University of Groningen deliberately created such settings as a part of a series of experiments designed to discover if signs of vandalism, litter and low-level lawbreaking could change the way people behave.
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The most dramatic result, though, was the one that showed a doubling in the number of people who were prepared to steal in a condition of disorder. In this case an envelope with a â‚¬5 ($6) note inside (and the note clearly visible through the address window) was left sticking out of a post box. In a condition of order, 13% of those passing took the envelope (instead of leaving it or pushing it into the box). But if the post box was covered in graffiti, 27% did. Even if the post box had no graffiti on it, but the area around it was littered with paper, orange peel, cigarette butts and empty cans, 25% still took the envelope.

The researchers’ conclusion is that one example of disorder, like graffiti or littering, can indeed encourage another, like stealing. Dr Kelling was right. The message for policymakers and police officers is that clearing up graffiti or littering promptly could help fight the spread of crime.

National Girls Collaborative Project for STEM

The National Girls Collaborative Project for science, technology, engineering, and mathematics (STEM) collaborates with those seeking to increase the participation of girls in STEM feeder activities. The goal is to encourage girls to pursue careers in science, technology, engineering, and math.

Collaboration as a Means to Building Capacity: Results and Future Directions of the National Girls Collaborative Project:

The purpose of the NGCP is to extend the capacity, impact, and sustainability of
existing and evolving girl-serving STEM projects and programs. The NGCP is structured to bring organizations together to compare needs and resources, to share information, and to plan strategically to expand STEM–related opportunities for girls.
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Although we are still refining it, the NGCP collaborative model has shown its effectiveness through increased collaboration and minigrant projects with sustained results. As we have described, the success to date of the NGCP in developing collaborations has been demonstrated via data from the collaboration rubric, mini-grant reports, and metrics that show how collaborative activities have increased over the duration of the NGCP projects. As NGCP expands over the next few years to provide regional collaboratives across the entire United States and Puerto Rico, we will continue our assessment of its impact and hope to be able to report its influence on building capacity to attract and retain girls in STEM.

I support programs encouraging STEM activities for girls – and boys. NSF data shows for 2005 shows women outnumbered men in undergraduate degree in science and engineering. For post-graduate degrees men still outnumbering women but that gap has been reducing and seems like it will continue to. And the representations in the workplace seem poised to continue to show a reducing number of men and increasing number of women. Engineering is an example of an area with far more men than women graduating – the imbalance is equivalent to the imbalance the other way for psychology.

Single-Celled Giant Provides New Early-Evolution Perspective

Discovery of Giant Roaming Deep Sea Protist Provides New Perspective on Animal Evolution
Biologist Mikhail “Misha” Matz and his colleagues recently discovered the grape-sized protists and their complex tracks on the ocean floor near the Bahamas. DNA analysis confirmed that the giant protist found by Matz and his colleagues in the Bahamas is Gromia sphaerica, a species previously known only from the Arabian Sea.

Matz says the protists probably move by sending leg-like extensions, called pseudopodia, out of their cells in all directions. The pseudopodia then grab onto mud in one direction and the organism rolls that way, leaving a track. Hr says the giant protists’ bubble-like body design is probably one of the planet’s oldest macroscopic body designs, which may have existed for 1.8 billion years.

“I personally think now that the whole Precambrian may have been exclusively the reign of protists,” says Matz. “Our observations open up this possible way of interpreting the Precambrian fossil record.”

He says the appearance of all the animal body plans during the Cambrian explosion might not just be an artifact of the fossil record. There are likely other mechanisms that explain the burst-like origin of diverse multicellular life forms.

Single-Celled Giant Upends Early Evolution

Slowly rolling across the ocean floor, a humble single-celled creature is poised to revolutionize our understanding of how complex life evolved on Earth.

A distant relative of microscopic amoebas, the grape-sized Gromia sphaerica was discovered once before, lying motionless at the bottom of the Arabian Sea. But when Mikhail Matz of the University of Texas at Austin and a group of researchers stumbled across a group of G. sphaerica off the coast of the Bahamas, the creatures were leaving trails behind them up to 50 centimeters (20 inches) long in the mud.

The trouble is, single-celled critters aren’t supposed to be able to leave trails. The oldest fossils of animal trails, called ‘trace fossils’, date to around 580 million years ago, and paleontologists always figured they must have been made by multicellular animals with complex, symmetrical bodies.

DoE: Minority Science and Engineering Improvement Program

The United States Department of Education’s Minority Science and Engineering Improvement Program (MSEIP) provides funds to schools to provide awards to students. 20 new awards (average value of $139,000) were awarded this year. That brings total funding this year to 71 awards (50 continue from previous years). Institutions recieving funds include: Clark Atlanta University, Rust College, New Mexico State University, Spelman College, Virginia State University and the College of Menominee Nation.

The program is designed to effect long-range improvement in science at predominantly minority and engineering education programs to increase the participation of underrepresented ethnic minorities, particularly minority women, into scientific and technological careers.

Wiley College, one of the new recipients, aims to increase the number of science majors, especially in the fields of biology and chemistry. A key feature of this grant is the creation of a high school science competition that will allow local and regional high school students to visit the campus and compete in a variety of scientific events.

This event will bring five area high schools together to compete in ten scientific events based on biology, chemistry, mathematics and physics. Individual first-place winners will be given scholarships to Wiley College. There will also be an overall grand champion awarded. This event will allow high school students to experience life at Wiley College and the possibilities of a career in science.

“This event not only gives students a financial reason to enroll at Wiley, but also allows them to become familiar with the campus and its faculty and students, said Dr. Shumate. “This grant also furthers a connection between Wiley and both the University of Texas at Dallas and the University of Arkansas, allowing current Wiley students to attend these schools in the summer for biomedical research.”

Wiley hosts HS science competition Saturday

Looking for Signs of Dark Matter Over Antarctica

Dark Matter Proof Found Over Antarctica?

High-energy electrons captured over Antarctica could reveal the presence of a nearby but mysterious astrophysical object that’s bombarding Earth with cosmic rays, researchers say. Or the electrons may be the long-awaited physical evidence of elusive dark matter.

Either way, the unusual particles are exciting for astrophysicists, who say they could someday confirm or deny decades of unproven theories. “In the first case, we have now seen for the first time a nearby source of cosmic rays.
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Cosmic rays are not beams per se but are any protons, electrons, and other subatomic particles that careen toward Earth from a variety of sources, including the supernova explosions that mark the deaths of stars.

Most of the cosmic electrons that reach Earth are low-energy, because the highest-energy ones fizzle the fastest and don’t last long enough to get here.

Scientists With Lots of Monitors Onboard Ship

photo of computer monitors onboard ship

Fun blog by Linds, a geophysicist, with fun name and tagline: PhD = Pretty huge Dork There’s no crying in grad school! I enjoy including some posts on scientists at work (and plan on trying to intentionally do more of that). The photo shows her office onboard ship – pretty impressive. I thought this monitor was cool.

The boat is a steel monster about 400 feet long. There’s three decks, with cabins, the galley and mess hall, a few different labs, a movie room, reading room and a weight room with white padded walls. It’s all very “Life Aquatic“, if you get the reference. [those that don’t follow the link its a crazy movie – John]
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We have been in transit for the past three days, getting our computers and systems up and running. We arrive at our first deployment spot tomorrow morning at 5:30 am. That is when we’ll put our first ocean bottom seismometer (OBS) down. The OBS itself is a sphere about 16 inches in diameter made of inch thick glass–these suckers are heavy! It’s vacuum sealed with the instrumentation inside and attached to an anchor. When we are done with the survey, the sphere is timed to detach from the anchor and it’ll float to the surface of the water. Our boat will pull up alongside it and we’ll scoop it out with a net and crane.
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woke up today at 3am to get ready for my first watch. We definitely have the worst seas that we have had so far. We are definitely pitching and rolling out here! We deployed our first OBS at 5am and are doing about 1 instrument/hr for the next 24 hours.

Those snippets are from various posts on the blog. Another from earlier:

But there is recent good news: that lone female professor (who is an amazing researcher and is highly respected in the field, chairs many committees both nationally and within the department and was president of the Geological Society of America in the 90’s) has been named the new department chair. I think this move is important in encouraging talented women scientists to apply for positions within the department and shows dedication on the part of the higher-ups to highlighting ‘diversity’ as a priority.

How Bleach Kills Bacteria

Developed more than 200 years ago and found in households around the world, chlorine bleach is among the most widely used disinfectants, yet scientists never have understood exactly how the familiar product kills bacteria. In fact, Hypochlorite, the active ingredient of household bleach, attacks essential bacterial proteins, ultimately killing the bugs.

“As so often happens in science, we did not set out to address this question,” said Jakob, an associate professor of molecular, cellular and developmental biology. “But when we stumbled on the answer midway through a different project, we were all very excited.”

Jakob and her team were studying a bacterial protein known as heat shock protein 33 (Hsp33), which is classified as a molecular chaperone. The main job of chaperones is to protect proteins from unfavorable interactions, a function that’s particularly important when cells are under conditions of stress, such as the high temperatures that result from fever.

“At high temperatures, proteins begin to lose their three-dimensional molecular structure and start to clump together and form large, insoluble aggregates, just like when you boil an egg,” said lead author Jeannette Winter, who was a postdoctoral fellow in Jakob’s lab. And like eggs, which once boiled never turn liquid again, aggregated proteins usually remain insoluble, and the stressed cells eventually die.

Jakob and her research team figured out that bleach and high temperatures have very similar effects on proteins. Just like heat, the hypochlorite in bleach causes proteins to lose their structure and form large aggregates.

These findings are not only important for understanding how bleach keeps our kitchen countertops sanitary, but they may lead to insights into how we fight off bacterial infections. Our own immune cells produce significant amounts of hypochlorite as a first line of defense to kill invading microorganisms. Unfortunately, hypochlorite damages not just bacterial cells, but ours as well. It is the uncontrolled production of hypochlorite acid that is thought to cause tissue damage at sites of chronic inflammation.

How did studying the protein Hsp33 lead to the bleach discovery? The researchers learned that hypochlorite, rather than damaging Hsp33 as it does most proteins, actually revs up the molecular chaperone. When bacteria encounter the disinfectant, Hsp33 jumps into action to protect bacterial proteins against bleach-induced aggregation.

“With Hsp33, bacteria have evolved a very clever system that directly senses the insult, responds to it and increases the bacteria’s resistance to bleach,” Jakob said.

New Supercomputer for Science Research

“Jaguar is one of science’s newest and most formidable tools for advancement in science and engineering,” said Dr. Raymond L. Orbach, DOE.s Under Secretary for Science. The new capability will be added to resources available to science and engineering researchers in the USA.

80 percent of the Leadership Computing Facility resources are allocated through the United States Department of Energy’s Innovative and Novel Computational Impact on Theory and Experiment (INCITE) program, a competitively selected, peer reviewed process open to researchers from universities, industry, government and non-profit organizations. Scientists and engineers at DOE’s Oak Ridge National Laboratory are finding an increasing variety of uses for the Cray XT system. A recent report identified 10 breakthroughs in U.S. computational science during the past year. Six of the breakthroughs involved research conducted with the Jaguar supercomputer, including a first-of-its-kind simulation of combustion processes that will be used to design more efficient automobile engines. Read the computational science report. Read full press release.

ORNL’s Jaguar fastest computer for science research

Jaguar will be used for studies of global climate change, as well as development of alternative energy sources and other types of scientific problem-solving that previously could not be attempted.

Zacharia said ORNL’s Jaguar was upgraded by adding 200 Cray XT5 cabinets – loaded with AMD quadcore processors and Cray SeaStar interconnects – to the computer’s existing 84 Cray XT4 cabinets. The combined machine resulted in the new standard for computational science.

The peak operating speed is apparently just below that of Los Alamos National Laboratory’s IBM Roadrunner system, which is designed for 1.7 petaflops. But the Jaguar reportedly has triple the memory of Roadrunner and much broader research potential.
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Because the Jaguar has come online sooner than expected, Zacharia said an alert was sent to top U.S. scientists inviting them to apply for early access to the Oak Ridge computer. Their scientific proposals will be reviewed on an accelerated timetable, he said.

The peak capability of 1.64 petaflops is attributed to 1.384 petaflops from the new Cray XT5, combined with 0.266 petaflops from the existing Cray XT4 system, Zacharia said.

How fast is a quadrillion calculations per second? “One way to understand the speed is by analogy,” Zacharia said recently. “It would take the entire population of the Earth (more than 6 billion people), each of us working a handheld calculator at the rate of one second per calculation, more than 460 years to do what Jaguar at a quadrillion can do in one day.”

Google Flu Leading Indicator

Google Flu Trends

During the 2007-2008 flu season, an early version of Google Flu Trends was used to share results each week with the Epidemiology and Prevention Branch of the Influenza Division at CDC. Across each of the nine surveillance regions of the United States, we were able to accurately estimate current flu levels one to two weeks faster than published CDC reports.
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So why bother with estimates from aggregated search queries? It turns out that traditional flu surveillance systems take 1-2 weeks to collect and release surveillance data, but Google search queries can be automatically counted very quickly. By making our flu estimates available each day, Google Flu Trends may provide an early-warning system for outbreaks of influenza.

For epidemiologists, this is an exciting development, because early detection of a disease outbreak can reduce the number of people affected. If a new strain of influenza virus emerges under certain conditions, a pandemic could emerge and cause millions of deaths (as happened, for example, in 1918). Our up-to-date influenza estimates may enable public health officials and health professionals to better respond to seasonal epidemics and — though we hope never to find out — pandemics.

This is an interesting example of finding new ways to quickly access what is happening in the world. Google must be doing significant amounts of similar things to see how usage patterns can server as a leading indicator.

Magnetic Portals Connect Sun and Earth

Magnetic Portals Connect Sun and Earth by Dr. Tony Phillips

During the time it takes you to read this article, something will happen high overhead that until recently many scientists didn’t believe in. A magnetic portal will open, linking Earth to the sun 93 million miles away. Tons of high-energy particles may flow through the opening before it closes again, around the time you reach the end of the page.

“It’s called a flux transfer event or ‘FTE,'” says space physicist David Sibeck of the Goddard Space Flight Center. “Ten years ago I was pretty sure they didn’t exist, but now the evidence is incontrovertible.”
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Researchers have long known that the Earth and sun must be connected. Earth’s magnetosphere (the magnetic bubble that surrounds our planet) is filled with particles from the sun that arrive via the solar wind and penetrate the planet’s magnetic defenses. They enter by following magnetic field lines that can be traced from terra firma all the way back to the sun’s atmosphere.

“We used to think the connection was permanent and that solar wind could trickle into the near-Earth environment anytime the wind was active,” says Sibeck. “We were wrong. The connections are not steady at all. They are often brief, bursty and very dynamic.”
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On the dayside of Earth (the side closest to the sun), Earth’s magnetic field presses against the sun’s magnetic field. Approximately every eight minutes, the two fields briefly merge or “reconnect,” forming a portal through which particles can flow. The portal takes the form of a magnetic cylinder about as wide as Earth.

See more posts on scientific inquiry and scientists advancing our understanding of how things work.