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Library of 3383 accessible STEM media resources.

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Showing resources 41 to 51 of 51

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  • Diagram of a circuit showing a battery with leads on the positive and negative side and a lightbulb in the middle. Reduction. Caption: During this process, one substance must gain electrons,

    Every portable electronic device is fueled by chemistry, specifically through oxidation-reduction or redox reactions. In redox reactions, one compound gains electrons (reduction) and one compound loses them (oxidation). Chemists can set up reactions so that electrons are forced to move in a certain way to create an electrical current. Metals often play a key role in redox reactions, which are essential to all aspects of chemistry, particularly in many biochemical processes. Part of the series Chemistry: Challenges And Solutions.

    (Source: DCMP)

  • Screenshot: Phet Simulation - Capacitor Lab: Basics. Adjustable voltage for a batery connected to two plates where you can adjust the separation of the plates in mm and the Plate Area.  Output shows the Capacitance in pF.  Various options for the view, plate charges, Bar graphs, electric field, current and a volte meter.

    An early exploration (2015) into how to make a sim accessible has taken place for Capacitor Lab Basics. The sim is keyboard navigable with some auditory descriptions when using 'Forms' mode with a screen reader. We are working on updating the content and the interactions, so that the simulation can be accessed by a screen reader in any mode. This prototype has been tested with NVDA and Firefox.

    (Source: PhET Interactive Simulations)

  • Illustration of a windmill 100 meters tall receiving air current next to a much taller structure receiving a much larger air current. Caption: The beauty of wind turbines is that they're 100% clean.

    Kathryn Johnson, an electrical engineer at the Colorado School of Mines, studies large utility-scale wind turbines. Kathryn’s research aims to make the turbines more efficient in order to capture as much of the wind’s energy as possible. Viewers also visit NSF’s National Center for Atmospheric Research, where scientists are working with local utility companies to create an advanced wind energy prediction system. Using data from sensors mounted on each turbine, the system generates a forecast specific to each turbine on a wind farm. This helps the utility company provide as much energy as possible from clean sources.

    (Source: DCMP)

  • Two people sitting at computer screens while a person on stage plays a wind instrument. Caption: to teach the computer to play the clarinet too.

    University of Rochester electrical engineer Mark Bocko has combined his passion for music with his passion for engineering, devising a way to digitally compress music files. Bocko’s team of engineers and musicians at Rochester’s Eastman School of Music are also helping uncover some extraordinarily precise details about just how music is made. With support from the National Science Foundation, they have built a computer model of the clarinet, entirely from real world acoustical measurements taken from human musicians. Measuring such things as how hard the musician is blowing into the instrument and the pressure the musician applies to the reed, they have modeled the way music is made.

    (Source: DCMP)

  • Small mechanical objects with wings. Caption: And so began the creation of the Robobee,

    Harvard University, electrical engineers Rob Wood and Gu-Yeon Wei, and computer scientist Radhika Nagpal created the “RoboBee,” a miniature flying robot, inspired by the biology of a bee and the insect’s hive behavior. With support from the National Science Foundation and a program called Expeditions in Computing, Wood put together a diverse team of collaborators to get the RoboBee project off the ground. Ultimately, the researchers hope to build a colony in which the RoboBees interact, using their hive as a refueling station. They say RoboBees have the potential to be useful in a number of ways, including search and rescue missions, traffic monitoring, and weather mapping. Part of the National Science Foundation Series "Science Nation."

    (Source: DCMP)

  • Illustration of an arm extended and energy cycling through the forearm. Energy continues out through the tips of the fingers. A wire intersects the hand, and an arrow indicates movement to the right. Caption: exerted on the conducting wire.

    Part of the "A 3-D Demonstration" series. Explores the basic principles behind the operation of AC and DC motors. Explains how one or more fixed magnets, either permanent or electromagnetic, can cause linear movement or rotation of a current-carrying wire. A hand rule is developed to predict motor force. Motor torque is explained as a prelude to the practical design of a direct current motor. Specific modules include Motors and Magnets, Current and Magnet Interaction, Left-Hand Rule, Motor Force, Motor Torque, and DC Motors. Correlates to all National CTE Organizational Standards (including the provisions of the Perkins Act).

    (Source: DCMP)

  • Small cloud representing an average snowstorm compared to a larger angry cloud representing a thundersnow storm. Caption: separating ordinary snowstorms from thunder snowstorms,

    What is a thundersnow storm? Most snow storms form when warm air moves into an area in the winter and rising warm air condenses to form snow. If the warm air rises very quickly, the condensing moisture collides with existing particles in the cloud causing electrically charged areas. When a cloud has charged areas, lightning can result. The accompanying sound is why scientists call these thundersnow storms.

    (Source: DCMP)

  • Person with a fabric cap strapped to their head. The cap has metal rivets and wires attached. Captions: (female) it feels maybe like a mild itchy or tingling sensation.

    Teachers often say to students, “Put your thinking caps on,” and one day, students might just do that for real. Vanderbilt University psychologist Geoffrey Woodman says that’s because scientists are being equipped with more and more tools they can use to better understand the brain, and now, they can even eavesdrop on individual neurons. Initial support from the National Science Foundation (NSF) allowed Woodman and his team at the Vanderbilt University Visual Cognitive Neuroscience Laboratory to study memory and perception. Then, the researchers tested their theory that electrical stimulation of the medial frontal cortex can boost learning and improve decision-making. Part of the National Science Foundation Series “Science Nation.”

    (Source: DCMP)

  • Glowing orb of a star surrounded by green, nebulous light. Stereo COR1 B. Caption: will suddenly be ejected into interplanetary space.

    While Earth's weather reports center on precipitation, temperature, wind direction, and humidity, space weather forecasts attempt to predict activity that occurs on the sun. Scientists also study how the weather on the sun will affect Earth. At the University of Michigan a team studies solar storms as they form and then barrel off the sun. Sometimes these storms hit the Earth with damaging force. Space weather has the potential to interfere with everything from satellite communications to electrical power. This team is aiming for a five-day forecast capability to give government, private industry, satellite operators, and power grid companies more time to take necessary action to protect critical infrastructure. Part of the "Science Nation."

    (Source: DCMP)

  • Illustration of a measurement device attached to leads which surround a central core that is emitting a moving magnetic field. Caption: As long as the magnetic field moves

    Part of the "A 3-D Demonstration" series. Looks at physics principles behind AC and DC generators. Examines the relationship between a changing magnetic field and the induction of electric current. A hand rule is introduced to predict the generator effect in a linear length of conductor exposed to a changing magnetic field. The behavior of a rotating coil in a magnetic field leads to the practical construction of an AC motor. Introduces split-ring commutator generators, as well as the more common alternator as a means of generating DC electricity. Specific modules include Generating Electricity, Inductors, Generator Left-Hand Rule, Generator Electromotive Rule, AC Generators, and DC Generators. Correlates to all National CTE Organizational Standards (including the provisions of the Perkins Act).

    (Source: DCMP)

  • Person with a device attached to their head behind and above their ear and a wire leading to a device that is affixed to the back of their ear. Caption: It's called a cochlear implant, and it helps me hear.

    The cochlear implant is widely considered to be the most successful neural prosthetic on the market. The implant, which helps individuals who are deaf perceive sound, translates auditory information into electrical signals that go directly to the brain, bypassing cells that don't serve this function as they should because they are damaged. Led by engineer Pamela Bhatti at the Georgia Institute of Technology, a team of researchers at both Georgia Tech and the Georgia Regents University created a new type of interface between the device and the brain that could dramatically improve the sound quality of the next generation of implants.

    (Source: DCMP)



Showing collections 1 to 3 of 3

  • Elements

    • Image
    • Text Document
    • 3D Model

    3D models and images of the entire periodic table of elements

    A collection containing 118 resources, curated by Library Lyna

  • PhET Simulations

    • Simulation

    A collection of simulations from PhET.

    A collection containing 15 resources, curated by Charles LaPierre

  • Biology

    • Video
    • Image
    • Text Document
    • PDF
    • 2.5D Tactile Graphic
    • 3D Model
    • Audio File

    Biology related concepts

    A collection containing 59 resources, curated by Benetech