Category Archives: Education

NASA Science Website

The NASA Science Mission Directorate sponsors scientific research, and develops and deploys satellites and probes in collaboration with NASA’s partners around the world to answer fundamental questions requiring the view from and into space. SMD seeks to understand the origins, evolution, and destiny of the universe and to understand the nature of the phenomena that shape it. SMD also seeks to understand:

* the nature of life in the universe and what kinds of life may exist beyond Earth;
* the solar system, both scientifically and in preparation for human exploration; and
* the Sun and Earth, changes in the Earth-Sun system, and the consequences of the Earth-Sun relationship for life on Earth.

Maybe, for this site NASA actually listened to the engineers: as this site works rather than making false claims about the visitor’s browser. The site includes content specifically targeted at teachers, students, researchers and the general public.

Mutualism – Inter-species Cooperation

Shrimp with Goby Fish

A Mutual Affair by Olivia Judson

I’d like to introduce you to one of my favorite animals: the shrimp goby. These pretty little fish lead lives of enviable indolence. As their name suggests, they live with shrimp (often, a pair). The shrimp build and maintain a burrow, which the goby and shrimp live in together. Each shrimp works hard, shoveling sand out of the front entrance like a miniature bulldozer. As soon as it’s delivered the rubble to a suitable distance, it shoots back into the burrow.

The front entrance of the burrow is often reinforced with bits of shell and coral — all of which is done by the shrimp. The goby just sits in the entrance of the burrow, keeping guard and warning the shrimp, which is nearly blind, of danger. At any sign of danger — a diver coming too close, a passing predator — the goby darts into the burrow. If the goby zooms in, the shrimp hastily retreats deep inside. And before the shrimp emerges from the burrow, it touches the goby’s tail with its long antennae. To show it’s safe to come out, the goby gently wiggles its tail. When the shrimp is out of the burrow, it keeps one antenna touching the goby. If the goby suddenly retreats, so does the shrimp.
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These animals are dependent on each other. Remove the fish, and the shrimp stops burrowing; the shrimp forage while burrowing, so without a fish, they grow more slowly, too. The shrimp need their guard goby. And the guard goby needs its shrimp: deny the goby shelter in a burrow, and it will promptly be killed by predators (yes, someone did the experiment). The shrimp keep the goby clean, too: they groom it.

photo by Boogies with Fish

Self-assembling Nanofibers Heal Spinal Cords in Mice

Self-assembling Nanofibers Heal Spinal Cords by Prachi Patel-Predd

An engineered material that can be injected into damaged spinal cords could help prevent scars and encourage damaged nerve fibers to grow. The liquid material, developed by Northwestern University materials science professor Samuel Stupp, contains molecules that self-assemble into nanofibers, which act as a scaffold on which nerve fibers grow.

Stupp and his colleagues described in a recent paper in the Journal of Neuroscience that treatment with the material restores function to the hind legs of paralyzed mice.
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The new work is the first test for the material to heal spinal cord injuries in animals. And Kessler says that it worked better than the researchers expected. The researchers stimulated a spinal cord injury in mice and injected the material 24 hours later. They found that the material reduced the size of scars and stimulated the growth of the nerve fibers through the scars. It promoted the growth of both types of nerve fibers that make up the spinal cord: motor fibers that carry signals from the brain to the limbs, and sensory fibers that carry sense signals to the brain. What is more, the material encouraged the nerve stem cells to mature into cells that create myelin–an insulating layer around nerve fibers that helps them to conduct signals more effectively.

Computer Science Unplugged

Computer Science Unplugged offers a free, interesting collection of activities designed to teach the fundamentals of computer science without requiring a computer. Because they’re independent of any particular hardware or software, Unplugged activities can be used anywhere, and the ideas they contain will never go out of date. Unplugged activities have been trialled and refined over 15 years in classrooms and out-of-school programs around the world maintained by the University of Canterbury in Christchurch New Zealand.

Topics include: Binary Numbers, Text Compression, Error Detection, Searching Algorithms, Sorting Algorithms, Steiner Trees and Public Key Encryption.

Clay Versus MRSA Superbug

“Healing clays” hold promise in fight against MRSA superbug infections and disease

Scientists from Arizona State University report that minerals from clay promise could provide inexpensive, highly-effective antimicrobials to fight methicillin-resistant Staphylococcus aureus (MRSA) infections that are moving out of health care settings and into the community.
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Unlike conventional antibiotics routinely administered by injection or pills, the so-called “healing clays” could be applied as rub-on creams or ointments to keep MRSA infections from spreading
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In their latest study, funded by the National Institutes of Health, Williams, Haydel and their colleagues collected more than 20 different clay samples from around the world to investigate their antibacterial activities… The researchers identified at least two clays from the United States that kill or significantly reduce the growth of these bacteria

Also listen to a podcast with the researchers, Lynda Williams and Shelly Haydel, that provides much more detail. The Science Studio podcasts from Arizona State University provides great science podcasts.

$25 Million to Princeton for Engineering Education

$25 million to support innovation in engineering education

The gift builds on Princeton’s longstanding strength in educating engineers who are broadly grounded in the liberal arts and can reach beyond purely technical approaches to achieve wise and creative solutions. The new center also seeks to extend those connections by creating and supporting engineering courses that attract liberal arts students. For all students, the center emphasizes entrepreneurship, leadership and service.
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“The quality of life for all societies is increasingly connected to our ability to understand, enhance and use technologies,” said Keller. “Since the rise of civilization, engineering has been integral to the development of societies and has helped people lead richer and more satisfying lives. More than ever, we must equip our graduates to be effective and innovative in deploying technology in the service of our nation and all nations.”

Currently, 60 percent of nonengineering students at Princeton take at least one engineering course; one of the center’s goals is to push that percentage to 100. Princeton’s School of Engineering and Applied Science currently offers more than 20 courses that engage students from outside the engineering school. These courses place technology in a social and historical context, emphasize entrepreneurship and provide substantial exposure to issues such as energy, the environment, cybersecurity and telecommunications. The gift will strengthen those courses and encourage the development of new ones. It also will support internships, entrepreneurial activities and a vibrant program of lectures and visiting professorships from leaders in business, government and academics.

“We see all students as engineering students,” said Sharad Malik, director of the newly named Keller Center for Innovation in Engineering Education. “Despite its pivotal role in modern life, engineering has often been perceived as an isolated discipline. I am extremely grateful to have the Kellers’ support in pushing hard in a new direction, shaping an education that spans engineering, the sciences and the humanities and connects academic learning to societal needs.”

First Lungless Frog Found

The first recorded species of frog that breathes without lungs has been found in a clear, cold-water stream on the island of Borneo in Indonesia. The frog, named Barbourula kalimantanensis, gets all its oxygen through its skin.
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Previously the only four-limbed creatures known to lack lungs were salamanders. A species of earthwormlike, limbless amphibian called a caecilian is also lungless. Tetrapods, or four-limbed creatures, that develop without lungs are rare evolutionary events, Bickford and colleagues write.

The trait in amphibians is likely an adaptation to life between water and land and their ability to respire through the skin. The researchers suggest lunglessness in B. kalimantanensis may be an adaptation to the higher oxygen content in fast-flowing, cold water.
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Wake added that for most amphibians, the majority of gas exchange happens through the skin. A low but significant amount of respiration occurs via simple, sac-like lungs. Most species, he noted, have mating calls that require lungs. So biologists are unsure why a few species have entirely gotten rid of the organs, Wake said.

Engineers Without Borders

Engineering as diplomacy

You cannot look into the eyes of a child who is dying from a disease caused by drinking dirty water — something that rarely, if ever, happens in the United States — and not feel changed. You cannot stand before her parents without thinking, “I’m an engineer. There must be something I can do.”
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A year later, I returned with 10 engineering students from the University of Colorado. We devised a rudimentary pumping system, bringing water to the people of San Pablo. Today, the village’s young girls go to school and are healthier.

That trip was a transforming experience, not just for the villagers, but also for me. Intuitively, we engineers like things big — expansive bridges, colossal dams, massive tunnels. My experience taught me that small-scale engineering can have the most impact on people’s lives.

When I returned to Boulder, I began building something else: Engineers Without Borders — USA. The organization was formed out of the conviction that engineers have a leadership role to play in addressing some of the world’s most serious problems: contaminated water, poor sanitation systems, expensive or harmful energy sources.

In a world focused on bigger and newer, there is growing recognition that small-scale engineering can play a major role in helping end the cycle of poverty that persists among almost half the world’s population. Studies by the World Bank and United Nations suggest the most basic technology is critical to bringing more than 3 billion people out of poverty.

Today EWB-USA counts more than 11,000 student and professional engineers as members and works in 43 countries on 300 projects involving water, sanitation, energy and shelter. Whether it’s combining sustainable technologies with advanced construction techniques to bring affordable housing to pockets of the world, drilling drinking water wells in Kenya, constructing fog collectors in the Himalayas to harvest fresh water or installing solar panels to provide energy for a remote hospital in Rwanda, we are healing communities throughout the globe, giving people dignity and hope for better lives.

Engineers without Borders is another vivid example of the benefits engineering brings to society.

Matter-Antimatter Split Hints at Physics Breakdown

Nature may have handed scientists a new clue in a longstanding mystery: how matter beat out antimatter for dominance of the universe. Early data from twin experiments at the Tevatron, the world’s reigning particle accelerator at Fermi National Accelerator Laboratory (Fermilab) in Batavia, Ill., suggest an unexpected chink in the hugely successful standard model of particle physics.

The twist comes from odd behavior in a particle called the BS (pronounced “B-sub-S”), which flips back and forth between its matter and antimatter forms three trillions times per second. Researchers believe that such a breakdown, known as CP violation, is required to explain why matter is so abundant.

Researchers say the finding is well worth following up to make sure it is not a random clump in the data, as frequently happens in particle physics experiments.
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Neither result on its own was very convincing, so a team of European researchers combined the data, similar to the way medical researchers cull information from independent clinical trials, to look for rare side effects. Together, the data make it 99.7 percent likely that the discrepancy is real, not due to chance, says physicist Luca Silvestrini… Such analyses require making judgment calls, but Silvestrini says he is confident in the finding.

We posted on this study last month in: Explaining the Missing Antimatter

Coopers Rock State Forest, West Virginia

photo of Coopers Rock State Forest in West Virginia

See more photos of my visit last year to Coopers Rock State Forest in West Virginia. The day before I visited Rocky Gap State Park in Maryland. Photos by John Hunter.