Biofeedback
Biofeedback is a technique you can use to learn to control your body's functions, such as your heart rate. With biofeedback, you're connected to electrical sensors that help you receive information (feedback) about your body (bio). This feedback helps you focus on making subtle changes in your body, such as relaxing certain muscles, to achieve the results you want, such as reducing pain. In essence, biofeedback gives you the power to use your thoughts to control your body, often to help with a health condition or physical performance. Why it's doneJan. 26, 2013 References About biofeedback.
Bioelectromagnetics
Study of electromagnetic fields and biological entity interaction Biological phenomena [edit] Bioelectromagnetism is studied primarily through the techniques of electrophysiology. Several animals are suspected to have the ability to sense electromagnetic fields; for example, several aquatic animals have structures potentially capable of sensing changes in voltage caused by a changing magnetic field,[2] while migratory birds are thought to use magnetoreception in navigation.[3][4][5] Bioeffects of electromagnetic radiation Most of the molecules in the human body interact weakly with electromagnetic fields in the radio frequency or extremely low frequency bands. Many behavioral effects at different intensities have been reported from exposure to magnetic fields, particularly with pulsed magnetic fields. A strong changing magnetic field can induce electrical currents in conductive tissue such as the brain. Effects of electromagnetic radiation on human health
Audio feedback
Howling caused by a circular path in an audio system Block diagram of the signal-flow for a common feedback loop.[1]: 118 Audio feedback (also known as acoustic feedback, simply as feedback) is a positive feedback situation which may occur when an acoustic path exists between an audio input (for example, a microphone or guitar pickup) and an audio output (for example, a loudspeaker). History and theory[edit] Distance[edit] To maximize gain before feedback, the amount of sound energy that is fed back to the microphones must be reduced as much as is practical. Directivity[edit] If monitors are oriented at 180 degrees to the microphones that are their sources, the microphones should have a cardioid pickup pattern. Frequency response[edit] Feedback can be reduced manually by "ringing out" a sound system prior to a performance. To avoid feedback, automatic anti-feedback devices can be used. Deliberate uses[edit] Early examples in popular music[edit] Introductions, transitions, and fade-outs[edit]
Cold Room? Heat It Up with A Homemade Solar Air Heater | Science Project
Summary Average (6-10 days) None Readily available Average ($50 - $100) You need to cut cardboard for this project and use paint. Michelle Maranowski, PhD, Science Buddies This project is derived from this solar air heater project: U.S. Abstract What do humans need to survive? Objective To build a simple solar air heater and heat the air in a room. Introduction The Sun is a medium-sized star in the center of our solar system that is a powerful and continuous source of energy. There are many ways to take advantage of the power and energy that the Sun provides. When you stand outside on a warm, sunny day, you can feel the warm air around you. Terms and Concepts Watt (W) Power Joule (J) Energy Questions How is the Sun's energy used to create electricity on Earth? Bibliography Solar Action Alliance. The following references, along with additional references on their pages, give lots of information about solar energy and different methods to take advantage of free energy. Rathjen, Don. (2001). Careers
The Science of Biofeedback & Proper Breathing
Beneficial acclimation hypothesis
Hypothesis of physiology The beneficial acclimation hypothesis (BAH) is the physiological hypothesis that acclimating to a particular environment (usually thermal) provides an organism with advantages in that environment. First formally tested by Armand Marie Leroi, Albert Bennett, and Richard Lenski in 1994, it has however been a central assumption in historical physiological work that acclimation is adaptive. History and definition[edit] Acclimation is a set of physiological responses that occurs during an individual's lifetime to chronic laboratory-induced environmental conditions (in contrast to acclimatization). The initial definition of the BAH, as published in 1994 in the Proceedings of the National Academy of Sciences by Leroi et al., is that “acclimation to a particular environment gives an organism a performance advantage in that environment over another organism that has not had the opportunity to acclimate to that particular environment.”[2] 2. Experimental tests[edit] 1. 2. 3.
Climate change feedback
Feedback related to climate change Climate change feedbacks are important in the understanding of global warming because feedback processes amplify or diminish the effect of each climate forcing, and so play an important part in determining the climate sensitivity and future climate state. Feedback in general is the process in which changing one quantity changes a second quantity, and the change in the second quantity in turn changes the first. Positive (or reinforcing) feedback amplifies the change in the first quantity while negative (or balancing) feedback reduces it.[3] The term "forcing" means a change which may "push" the climate system in the direction of warming or cooling.[4] An example of a climate forcing is increased atmospheric concentrations of greenhouse gases. By definition, forcings are external to the climate system while feedbacks are internal; in essence, feedbacks represent the internal processes of the system. Positive[edit] Carbon cycle feedbacks[edit] Hydrates[edit]
Correlation of Coronal Mass Ejections with the Solar Sunspot Cycle | Science Project
Summary Long (2-4 weeks) None Readily available Very Low (under $20) No issues Andrew Olson, Ph.D., Science Buddies Abstract Scientists have known for hundreds of years that sunspot activity waxes and wanes over a cycle that lasts approximately 11 years. Objective The goal of this project is to determine whether there is a correlation between coronal mass ejection activity and the solar sunspot cycle, using historical data. Introduction You know that the sun is the ultimate source of energy for most life on earth. CMEs can not only put on a spectacular light show, they can also wreak havoc with earth-orbiting satellites and sometimes even ground-based electrical systems. "At over 1.4 million kilometers (869,919 miles) wide, the Sun contains 99.86 percent of the mass of the entire solar system: well over a million Earths could fit inside its bulk. To understand where CMEs originate, you should do background research on the structure of the sun. What is a sunspot, anyway? Terms and Concepts Careers
The Science of Biofeedback
