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    TRANSISTOR RADIO
    December 23, 1947 - Bell Laboratories

    Greece 1947 USA Transistor Radio December 23rd, 1947 : Bell Labs demonstrates the worlds first Transistor Radio, Bell had also created the first transistor just a few months earlier. Many companies have claimed and are attribeted as the worlds first including Texas Instruments, Sony and the German firm Intermetall but it depends on how you view the quality of the radios , so I will leave that to others to judge.

    TRANSISTOR
    December 23, 1947 - Bell Laboratories, U.S.A.

    The transistor was first demonstrated by Walter H. Brattain and John Bardeen to their higher-ups at Bell Laboratories. A microphone and headphones were connected to the transistor, and the device was actually spoken over "with no noticeable change in quality" as Brattain wrote in his notes about that day. The name transistor came from its electrical property known as trans-resistance. The original device, which the researchers first had working on 16 Dec 1947 was a point-contact version, which was later improved by William Schockley as a junction transistor. The inventors shared the 1956 Nobel prize in physics for their work. The transistor replaced the bulkier vacuum tube, and was referred to as the electronic engineer's dream.

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RANDOM QUOTES

  • Until a man duplicates a blade of grass
    by Earth Day, Thomas Alva Edison Inventor

    "...Until a man duplicates a blade of grass, Nature can laugh at his so-called scientific knowledge. Remedies from chemicals will never stand in favorable comparison with the products of Nature, the living cell of a plant, the final result of the rays of the sun, the mother of all life...."
  • The wealth of the nation
    by Earth Day, Gaylord Nelson

    "...The wealth of the nation is its air, water, soil, forests, minerals, rivers, lakes, oceans, scenic beauty, wildlife habitats and biodiversity that'as all there is. That'as the whole economy. That'as where all the economic activity and jobs come from. These biological systems are the sustaining wealth of the world...."

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  • Salary
    about Steve Jobs

    Steve Jobs' annual salary was $1, just enough to keep company health benefits. Harvard Medical School
    about Eyesight Myth and Fact

    Myth: Staring at a computer screen all day is harmful to the eyes. Fact: Spending the day staring at a screen can tire or strain your eyes, but it will not hurt them. Make sure lighting doesn't create a glare on your screen. When spending long periods at your keyboard, take a break now and then to rest your eyes to reduce fatigue. Also, don't forget to blink. Your eyes need to stay lubricated to feel comfortable.

Lighting Fixtures :

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Is it time to remodel or buy a new house? Do you need ceiling fixtures for your rooms? Will you need to have different light fixtures for each room? Also decide which of these bulbs best fits your needs.

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When you first buy a house, remodel, or redecorate your house, this will be a good time to change your lighting fixtures. When redoing a room, it may take a few fixtures to bring out the room to the way it should be. Each room has a purpose and your lighting should correspond with that purpose.

You can really bring out a room with a light fixture that is bold and striking. Ceiling fixtures come in all types of designs and can drastically change the feeling of your room. Lamps can be added to add contrast the ceiling lighting. If you do a lot of reading then you will need a high intensity reading lamp.

The best types of reading lamps are those that are full spectrum lamps. These are specialty lamps and produce white light similar to the sun. Unlike regular incandescent bulbs, they create white light by emitting light frequencies like the sun does. This type of white light is good for reading and easy on the eyes.

When looking for a ceiling lamp fixture, look for functionality. If the fixture has too many design features, it can block the light and provide very little general lighting to your room.

If you room is to have computers, then a ceiling lighting fixture with indirect lighting will be best to avoid computer monitor glare. If possible try to avoid using florescent lamps in your living area since they emit light in 60 cycles which fatigue your brain and body.

The ceiling lighting is not only for the kitchen but for the other rooms like the bedroom, stairway, hallways, and recreation room.

The type of bulb you can put into a lighting fixture is only limited to the type of bulbs that are available in the market. Each bulb has a function and a specific frequency and power output in watt. When using a halogen bulb, use a fixture that will enclose this lamp in case it explodes. Full spectrum light bulbs are also available and I favor these because they mimic natural light more than any other type of bulb.

Saving energy light bulbs are nice in concept, but don?t away put out the light intensity that you need in the room. If you have multiple fixtures and you can put these energy saving bulbs. Then again depending on the room's purpose, this will determine the wattage of bulbs you use.

When looking at ceiling fixtures, consider the efficiency of the fixture. Some fixtures are beautiful to look at, but absorb the light that should go to the room. Make sure that the lamp is easy to clean otherwise you will be wishing you had bought another type of lamp. Also look to install a rheostat to control the light. This manual light control will give your bulb long life and you can adjust the intensity of the bulb to give more or less light.

Using these tips will help you setup your lighting fixture so that you don't have to replace it later. Just make sure that you use the fixtures that will complement the purpose of your room.

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