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Explains what a stroke is, types of strokes, warning signs, physical and mental effects of strokes, and risks for strokes. Presents information on the diagnosis and treatment of strokes and stresses the importance of early treatment. Stroke victims and their families share their experiences.
When a tsunami hits, it may come ashore like a fast rising flood and strike with devastating force. The series of waves may continue for hours. Sometimes the first one may not be the last or the largest. Potential warning signs of an incoming tsunami include a strong earthquake that causes difficulty standing, a rapid rise or fall of the water along the coast, and a loud ocean roar. Part of the "Danger Zone" series.
Rip currents account for 80% of beach rescues, and can be dangerous or deadly if swimmers don't know what to do. Before heading to the beach, one should check local beach forecasts and always swim near lifeguards. Beachgoers should also look for any warning signs or flags. If a swimmer happens to be caught in a rip current, stay calm. The most effective way to break from a rip current is to float. Part of the "Danger Zone" series.
Sirens are a small part of the sophisticated warning system used for tsunami alerts. Meteorological agencies issue warnings and send alerts to television and radio channels, the Internet, and mobile phone networks. These systems are found throughout the world and are vital for tsunami prone areas like Japan. Part of the "Danger Zone" series.
An introduction to sign vocabulary that is specific to science. Many interpreters, teachers, and students are unfamiliar with specialized sign vocabulary because the concepts occur infrequently in daily communication. In this video a Deaf professional signs vocabulary related to his field of expertise. The signs being demonstrated are commonly accepted by the Deaf community, but may not be the only sign for a specific word. Signs often vary across the country, so viewers are encouraged to confirm that signs used in this video are those used in their area/region of the country. Where appropriate, more than one sign or combinations of signs are demonstrated in this video for the same English word.
So many technological developments have taken place this century that enable medical professionals to practice medicine at a distance. Thanks to information technologies it is no longer necessary to go to the doctor's office for a checkup or diagnosis. Doctors now have the ability to take vital signs, perform tests, or even operate from a distant location.
What do you know about bats? Are they our friends or enemies? Emphasizes that bats help us with pollination, seed dispersal, and by eating millions of bugs. Discusses their habitats and the foods they eat. Shows that their appearance and size differ. Closes with a warning that bats are wild animals.
Rendered in woodcut-inspired 2-D, this short animation serves as a comic warning about the devastating effects of clear-cutting rain forests. The story unfolds in a lush jungle inhabited with exotic creatures. Suddenly, a chain saw can be heard in the distance, followed by the sound of trees crashing to the ground.
There are only a few procedures that can detect very early signs of cancer. Those that do are often invasive, expensive, and uncomfortable. With support from the National Science Foundation, Vadim Backman of Northwestern University is developing technology that makes detecting cancer earlier. He’s doing it by shedding light on cancer cell development at the nanoscale level.
Find out the scoop on streamgages. What are they? How do they impact everyday life? Whether drinking from the tap, using electricity, or canoeing down a river, all of these activities benefit from information gathered by USGS streamgages.
Scorched by their proximity to the sun, Mercury and Venus are hostile worlds. One is gouged with craters from cosmic collisions, and the other is a vortex of sulfur, carbon dioxide, and acid rain. Prime examples of planets gone awry, do they serve as a warning for ominous scenarios that might someday threaten Earth? Cutting-edge computer graphics are used to show what life would be on other planets and to imagine what kind of life forms might evolve in alien atmospheres.
Whether they arise from human causes or forces within planet Earth itself, natural disasters threaten life and civilization with what seems to be growing frequency. Studies troubling developments in marine, arctic, wetland, and urban environments while highlighting research opportunities that may help prevent future catastrophes. Coral reef decay, Everglades habitat loss, polar ice disappearance, and global warming are all analyzed. Looks at earthquake prediction, hurricane and tornado tracking, air pollution monitoring, tsunami warning systems, and the cleanup of toxic flood sediment in New Orleans.
The Nanosystems Engineering Research Center (NERC) for Advanced Systems of Integrated Sensors and Technologies (ASSIST) at North Carolina State University is developing technology that will alert someone when air pollution is about to take its toll on their heart and lungs. ASSIST Director Veena Misra and her multidisciplinary team are using nanotechnology to develop small, wearable sensors that monitor a person’s immediate environment, as well as the wearer’s vital signs. Part of the National Science Foundation Series “Science Nation.”
Unless someone like you cares a whole awful lot, nothing is going to get better. It's not, writes Dr. Seuss in this cautionary tale of greed and environmental destruction. Narrated by the villain of the story, the Once-ler, the tale recounts how the Lorax tried to save the Truffula Forest and its inhabitants from disaster at the hands of the insatiable factory owner. The Lorax's pleas are ignored and tragedy follows. A Dr. Seuss classic, it also serves as an ecological warning that still rings true today.
Students receive a crash course in the physiology and functioning of their hearts as well as how to keep their hearts healthy. Animations clarify how the heart works to provide oxygen and nutrients to all the tissues and organs of the body. They also detail what can go wrong. The program stresses that even teenagers can show early signs of atherosclerosis and other heart problems. Two cardiologists and a dietitian then pinpoint the main risk factors for an unhealthy heart, including: smoking, abnormal levels of cholesterol, high blood pressure, obesity, diabetes, and physical inactivity.
For nearly a decade, with support from the National Science Foundation, Doppler on Wheels (DOW) has been doing its best work in dangerous weather to gather scientific data about wind, rain, and snow. Meteorologist Josh Wurman and his team at the Center for Severe Weather Research in Boulder, Colorado coordinate a fleet of storm-chasing vehicles from a compact control room inside one of the DOW trucks. From thunderstorms to blizzards, hurricanes to tornadoes, DOW is providing extensive and detailed information that may ultimately improve warning systems and weather prediction. Part of the National Science Foundation Series “Science Nation.”
Part of "Show Me Science" series. Are animals intelligent? Bees communicate with each other. Monkeys use rocks and sticks to help them get food. Is this instinctual or is it evidence of thought? Some scientists believe that one measure of intelligence is self-awareness, and that an animal's reaction to its own image in a mirror can tell us whether or not it is self-aware. Looks at fish, birds, monkeys, and primates and their reactions to themselves in a mirror. Researchers look for signs of self-recognition as they observe, record, and interpret the reactions of these animals. Includes suggestions for careers in this field of study.
Some bandages are embedded with medicine to treat wounds, but researchers at Harvard University and Brigham and Women’s Hospital have something much more sophisticated in mind for the future of chronic wound care. With support from the National Science Foundation, engineer Ali Khademhosseini and a multidisciplinary team are bringing together advances in sensors, biomaterials, tissue engineering, microsystems technology, and microelectronics to create “smart bandages” for wounds that require ongoing care. The devices, known collectively as flexible bioelectronics, will do much more than deliver medicine. They will be able to monitor all the vital signs of the healing process and make adjustments when needed, as well as communicate the information to health professionals who are off-site.
In this episode, groups of citizen scientists use mobile technology to help save lives. Volunteers across North America measure precipitation, and their data is used by emergency managers to issue warnings during extreme weather conditions. In India, a phone app helps officials alert communities about killer heat waves. Citizen scientists also help collect data about Alzheimer's disease. They hope their data will aid the research process and lead to a cure. Part of "The Crowd and the Cloud" series.
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Resources to teach younger students about animals
A collection containing 58 resources, curated by DIAGRAM Center