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Electronic Components
Outdoor Heaters - Ever Wondered What Infrared Heat Is?
Infrared heaters have become more common across many parts of the United States, and have gained popularity from a lot of people who are pleased with the performance of these units. Infrared (electromagnetic radiant infrared energy) is the transfer of thermal energy via invisible electromagnetic energy waves that can be felt like the warmth from the sun, a downwind fire, or other hot objects. It's a form of radiant heat that is also called "infrared energy". About 80% of the sun's rays actually fall into this spectrum, and this is the part that warms your skin when the sun's rays hit you.
Published: 2011-12-27 11:36:50
India: cellphones generate radiation, send a text message instead
Author: Daniel Cooper
Is your cellphone bad for your health? India's government seems to think so, because it's planning a law that will require all phones to display how much electro-magnetic radiation they generate. Radiation is measured in SAR (Specific Absorption Rate) and the Indian limit has been lowered to match the USA's 1.6W/kg, whereas before it followed the European ceiling of 2W/kg. But even handsets that meet this criterion may have to declare their SAR level, and also carry a message asking people to keep their calls or short or use SMS instead -- implying that the Indian government regards radiation as dangerous at any level.
[Thanks, Yogesh] India: cellphones generate radiation, send a text message instead originally appeared on Engadget on Fri, 23 Dec 2011 07:31:00 EDT. Please see our terms for use of feeds. Permalink |  Times of India | Email this | Comments
Published: 2011-12-23 05:31:00
The Dynamic Nature of Heat in Design
Author: Shaan Hurley
 Heat transfer refers to the movement of heat energy through the world around us. Refrigerators, ovens, laundry machines, cars, computers, and buildings are designs that all manage the flow of heat in one way or another.
There are four major types of heat transfer: - Conduction —The transfer of energy between objects in physical contact
- Convection —The transfer of energy between an object and its environment
- Radiation —The transfer of energy to or from a body through emission or absorption of electromagnetic radiation
- Mass transfer —The transfer of energy from one location to another as a side effect of moving an object containing that energy
Understanding the physics and thermodynamics of heat transfer will allow you to use energy more effectively by optimizing the form and materials used  in your designs. The rate of heat transfer depends on the materials you use, and goes up as both temperature difference and surface area increase. Here is a great Sustainability Workshop video for students explaining the fundamentals of heat transfer optimization in design: http://bit.ly/vrhDck
  
Published: 2011-12-12 12:41:40
Elmer for PDEs
Author: Joey Bernard
Elmer is an open-source multiphysics simulation software that has been
around since 1995. It is developed by the CSC — IT Center for Science
Ltd. This group is administered by the Ministry of Education, Science
and Culture in Finland. With Elmer, you can model physical systems, such
as fluid dynamics, electromagnetism, heat transfer and acoustics. more>>
       
Published: 2011-11-21 09:56:09
All About Heating Systems
Heat is a form of energy derived from the kinetic action of molecules in matter. The sun is the source of all heat on earth due to the nuclear fission that takes place in it. The effect of this is to produce electromagnetic radiation which then has a heating effect when it reaches the earth. Heat is the driving force for all life on earth.
Published: 2011-11-09 11:52:11
Aura Psychic Readings: The Meaning Of The Different Aura Colors
One of the best ways to come up with the most accurate psychic readings is through a person's aura. For those of you who don't know, an aura is a layer of electromagnetic field that surrounds any animate or inanimate thing. There are several layers to auras, all of them emanating from one body, and for a person, this gives them an idea of their own health, emotion, personality and many other things.
Published: 2011-11-09 09:10:07
Accurate Psychic Readings: The Different Layers of The Aura
According to accurate psychic readings, all living things possess an aura. This refers to the energy field that surrounds every single atom, particle or cell of that living thing. To be specific, it's an electromagnetic field that every person, organism or organism is surrounded in, usually extending anywhere between 2 to 3 feet from the body and appears in a variety of colors.
Published: 2011-11-08 15:30:00
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