Light conforms to certain rules. These rules are, for the most part, simple and sensible, but they create situations that can be counterintuitive or perplexing.
    The activities for this topic focus on three of the rules: (a) light travels in a straight line; (b) the farther you are from a light source,

    Color is such an everyday phenomenon that we don't usually give it a lot of thought. But colors can produce surprising effects, for example, in the way they mix together. We can also use color directly in science to learn about the universe.
    The activities for this topic explore color in three differen

    Light is everywhere in our world. We need it to see: it carries information from the world to our eyes and brains. Seeing colors and shapes is second nature to us, yet light is a perplexing phenomenon when we study it more closely.
    Here are some things to think about:
    Our brain

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    HOLONIC TOWER includes a hybrid vertical transportation system to transport both peop

    Toshiba Elevator and Building Systems Corp. (TELC) today announced installation of the world"s fastest passenger elevator in the world"s tallest building, Taipei 101, in Taipei, Taiwan. This elevator, developed by TELC, runs at a speed of 1,010 meters per minute or 60.6km per hour and has been officially certified by Guinness

    Tokyo, 17 January 2006 - Toshiba Elevator and Building Systems Corp. (TELC) today announced that it has developed the world's first elevator guiding system in which “Non-contact magnetic suspensions” has been used to realize smoother riding comfort, and aims for the commercialization of the product in the spring of 2008.

    Jakarta , July 13, 2006 - The World Bank Board recently approved the Third Water Supply and Sanitation for Low Income Communities Project, which will cover some 100 districts in 12 provinces over seven years. The Project aims to improve the water supply, sanitation, and hygiene of some 5,000 of Indonesia's poor communities. Th

    WASHINGTON, July 18, 2006 - The World Bank Board of Executive Directors approved a $10 million International Development Association credit*, in additional financing, for an ongoing water sector project in the Republic of Niger.
    The Niger Water Sector Project, which began implementation in September 2

    A reheat VAV box is very simular to a single duct VAV box. The only difference here is electric heat strips or a hot water coil at the discharge of the box that would heat the airflow back up before it enters the space. Calibrating the airflow through the box would be set up the same as a single duct VAV box. The things to che

    Dual Duct VAV boxes are used mostly in hospitals and clinics were the air must be at a constant flow. When the space is calling for full cooling the cold deck damper should go open to its max design cfm while the hot deck damper goes closed. The opposite happens when the space is calling for full heating. What makes this box s

    A single duct VAV like the one shown here is one of the most basic air terminal units installed. There is no heat generated from this type of box, it is strictly used for supplying airflow in cooling mode. A maximum and minimum cooling can be set to any desired cfm as long as it is within its design capabilities. This type of

Air Conditioning
    Air conditioning is a system of fans to keep a house or a car at a cool temperature in hot weather. Air conditioners come in different sizes and levels of cooling. There are air conditioners built to cool single rooms, air conditioners built to cool houses, and air conditioners built to cool entire apart

    For more than one year now, the media and environmentalists have been predicting that President George W. Bush would relax portions of the Clean Air Act. And last week he appeared to do just that, announcing a fresh interpretation of the infamously confusing "new source review" (NSR) pollution rule that mainly governs old, coa

    The air conditioner efficiency express the ratio between btu/hr removed to each watt of power drawed. EER and SEER.The cooling equipment systems used in residential and small commercial buildings often express cooling system efficiency in terms of the Energy Efficiency Ratio (EER) and/or Seasonal Energy Efficiency Ratio (SEER)

August 1, 2006
Consulting-Specifying Engineer
    In response to member and market demand, ASHRAE is exploring a certification program that will focus on areas of the building environment such as commissioning, health-care facility engineering, building operation and sustainability. The Society is pursuing partnerships with