Science Nation - Early Cancer Screening
By: nsf With few early symptoms, ovarian cancer — like many cancers — can be hard to detect without invasive and expensive procedures. "Early detection is absolutely not only key but probably the only way for us to win the war on cancer," says Vadim Backman who is a biomedical engineer at Northwestern University in Evanston, Ill. With support from the National Science Foundation, in part funded through the American Recovery and Reinvestment Act of 2009 (ARRA), Backman's research is shedding
Science Nation - Bionic Leg
By: nsf A shark attack survivor now knows what it feels like to be part bionic man. 23-year-old amputee Craig Hutto has volunteered to play guinea pig, testing a state-of-the-art prosthetic leg with powered knee and ankle joints. With early support from the National Science Foundation and continued support from the National Institutes of Health, Vanderbilt University mechanical engineer Michael Goldfarb has spent several years developing the leg, which operates with special sensors, an electric
Science Nation - Skin Mounted Electronics
By: nsf John Rogers and his team at the University of Illinois, Champaign-Urbana have come up with a way to monitor the body electronically that really sticks. They have developed a small, flexible circuit device that sticks comfortably to the skin and is artfully camouflaged as a temporary tattoo. It can read a patient's brainwaves, heart rate and muscle activity while they are going about their normal activity, making it possible to cut back on visits to the doctor's office. Rogers envisions o
Science Nation - Africa's Drinking Water
By: nsf Access to safe drinking water is a global problem for nearly a billion people. For approximately 200 million people, many in Africa, high levels of naturally occurring fluoride in the water cause disfiguring and debilitating dental and skeletal disease. University of Oklahoma (OU) environmental scientist Laura Brunson is back from Ethiopia where, with support from the National Science Foundation, she's developing fluoride filtering devices that use inexpensive materials readily available
Science Nation - How Does Your Garden Grow?
By: nsf At first, the back room of plant physiologist Edgar Spalding's lab at the University of Wisconsin-Madison might be mistaken for an alien space ship set straight out of a Hollywood movie. It's a room bathed in low-red light with camera lenses pointing at strange looking entities encased in Petri dishes. A closer inspection reveals the Petri dishes contain nothing alien at all, but rather very down-to-earth corn seedlings. They're grown in red light for optimal growth. They're just one of
Science Nation - Nosing Out Mosquitoes
By: nsf Vanderbilt University researchers say they're working to unleash an insect repellent on mosquitoes that's more powerful than DEET. The discovery could one day be effective in reducing the spread of mosquito-borne diseases, such as malaria. It's based on a mosquito's sense of smell. With early support from the National Science Foundation, Vanderbilt University biologist Laurence Zwiebel researched which mosquito genes are linked to odor reception. Since then, he's discovered a separate od
Science Nation - Gaze into my Eyes
By: nsf When it comes to communication, sometimes it's our body language that says the most - especially when it comes to our eyes. "It turns out that gaze tells us all sorts of things about attention, about mental states, about roles in conversations," says Bilge Mutlu, a computer scientist at the University of Wisconsin-Madison. Mutlu knows a thing or two about the psychology of body language. He bills himself as a human-computer interaction specialist. Support from the National Science Founda
Science Nation - Renewable Energy, a Reality Check in Rural China
By: nsf Young engineer takes on a global challenge: Clean and sustainable energy, one village at a time Abby Watrous learned an important engineering lesson while working in rural China. For this and more Science Nation, go to http://www.nsf.gov/news/special_reports/science_nation/index.jsp
Science Nation - Unraveling the Mysteries of Tornadoes
By: nsf Greg Carbin knows a lot about severe weather. He's a meteorologist at the storm prediction center, located just south of Oklahoma City in Norman, Okla. In a quiet room on the second floor of the National Weather Service building, meteorologists are standing guard twenty-four hours a day, seven days a week, keeping an eye on weather systems that could unleash violent storms and tornadoes. The meteorologists issue storm watches as needed. For this and more Science Nation, go to http://www.
Stereotactic body radiation therapy cancer treatment
By: mdanderson Stereotactic body radiation therapy (SBRT) differs from traditional radiation therapy for cancer patients. Treatment takes less time (four days versus seven weeks), it’s double the radiation dose and it spares the healthy tissue surrounding the tumor. SBRT is commonly used to treat lung and pancreatic cancers, as well as cancers that have spread to the liver, lung, adrenal glands and spine. Joe Chang, M.D., Ph.D., associate professor in Radiation Oncology at MD Anderson Cancer C
zee bee junior basic blues lick in E major
The next generation of ocean exploration ... the SeaOrbiter. (6:21)
Catherine the Great Part 1/5
Catherine II , also known as Catherine the Great. She reigned as Empress of Russia from 9 July 1762 VIDEO 26:35
Effects of Parameters on Graphs (Interactive)
Students will be given examples of parabolas and a method for determining the look of a graph describing a parabola. The student will have an opportunity to use and manipulate the quadratic formula in determining a graph. The values of the formula will also be determined after reading a graph.
Calculus: Finding Derivatives Using the Exponent Rule
This video shows examples of finding the derivative of polynomials using the exponent rule. It works through the Calculus problems step-by-step, and shows a list of the steps that need to be taken to solve the problem. (3:22)
Geometry (Interactive Game)
Identify plane and solid geometric shapes by moving each shape into a corresponding box which displays the name of that shape.
Geometry (Interactive Game)
Match shapes with their names by dragging the shape to the box labeled with its name in this online interactive game.
Faces of a Cube (Interactive)
Describe relationships between two-dimensional and three-dimensional objects (squares/cubes, circles/spheres, triangles/cones). Name concrete objects and pictures of three-dimensional solids (cones, spheres and cubes).
Obama Releases His Birth Certificate
People seeking to undermine Barack Obama's legitimacy as president circulated a rumor that he was not born in the United States. On April 27, 2011, Obama releases his long-form birth certificate and asks that the American people and press put an end to the "silliness" and focus on more important matters. (2:46)