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TODAY IN HISTORY

    RAZING OF JERUSALEM
    January 15, 1970 - Israel

    The first evidence was uncovered of the razing by fire, of Jerusalem by Roman troops led by General Titus in 70 A.D. upon orders from Caesar. Israeli archaeologist Prof. Nahumn Avigad excavated ruins in the Jewish Quarter of Old Jerusalem, a few hundred yards from the Wailing Wall. Three meters (10 feet) under the earth, he found two rooms with evidence of intense heat and ashes. One was apparently a pharmacy, with beautifully carved stone jars, stone weights, and measuring cups. The second was perhaps a woodworking shop. The coins were found which helped precisely date the event. Despite the destruction, the site was valuable because the objects were found buried there as they had been used.

    SOLAR HEATED HOUSE
    January 15, 1955 - Tucson, Arizona, U.S.A.

    The first U.S. house to be both solar-heated and radiation-cooled started its system. It was built in Tucson, Arizona by solar physicist Raymond W. Bliss, Jr. (6 Oct 1915 - 7 Nov 2004). The system was built at a cost of nearly $4,000 for labor and materials. It was made using a large slanted slab of steel and glass that converted sunlight into heat, which was directed into the house. Summer cooling used the same ducts and associated fans and controls. The first U.S. house to be completely solar heated was occupied in Dover, Mass. On 24 Dec 1948. That heating system was designed by Dr. Maria Telkes from the MIT Solar Laboratory, used black sheet metal collectors to capture solar energy, stored by the phase-change of sodium sulfate decahydrate in “heat bins.”

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    "...Our greatest happiness does not depend on the condition of life in which chance has placed us, but is always the result of a good conscience, good health, occupation, and freedom in all just pursuits...."

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    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. Drug Abuse
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    Facts about drugs can protect against drug abuse. Legal drugs, such as alcohol and tobacco, kill more people than illegal drugs. Tobacco (smoking cigarettes) kills more people than any other drug. Illegal drugs including heroin, cannabis, ecstasy and amphetamines can have unknown or dangerous ingredients. Mixing drugs, especially with alcohol, can be fatal.

RC Hobby :

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RC hobby, which is taking up RC toys as a hobby, can entertain and give you a fun-filled experience. These RC toys are taking the spotlight for a great hobby, not only for kids but also for adults. It's never too late to try one as more and more people are getting into this kind of hobby.

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RC hobby, which is taking up RC toys as a hobby, can entertain and give you a fun-filled experience. These RC toys are taking the spotlight for a great hobby, not only for kids but also for adults. It's never too late to try one as more and more people are getting into this kind of hobby. Amongst the various types of RC toys, RC Helicopter is the most popular nowadays.

With the ongoing of the technological enhancements, flying a RC helicopter is fun and very affordable. With only about $60, you can have your own dream to fly a RC toy. Another benefit of an RC hobby is that these toys do not release harmful fumes than the other helicopter models and types release. Thus, the pilot and the onlookers will always be safe from harmful chemicals. It's always said that it's easier to fly than any other models. Most RC helicopters are ready to use and fly after the purchase; you don't need to assemble anything anymore.

The usual RC helicopter needs at least four controls. One is called the Roll or the Cyclic Pitch, the Elevator control, the Rudder, and the Collective Pitch or Throttle. You can then control the height of the flight, the steadiness of the course, and some experts like to do an acrobatic control with their RC hobby crafts. RC toys are best played in an open field where you can observe their every move and route. However, RC Helicopters are better than RC airplanes because helicopters don't need a runway to fly, you can definitely fly it anywhere, even in your backyard or inside the house.

The care and maintenance of this kind of toy is not as complicated as you think. It is a technical hobby so you also have to learn some technical tips to better care for your RC toy. The battery life is an important thing to know how to stretch the limit. Before charging it again after it drained, let it cool down first for about 15 minutes before hooking it up to charge. In this way, you will help the battery have a break and not overuse it. Before using the toy, make sure that the screws and bolts are secured in the proper places to avoid any unexpected accidents with your RC hobby craft. If something is not right, like the presence of a weird sound that you have not heard before, you have to stop using it and have it checked first with an expert to avoid sudden breakdown of your RC toy. And when keeping the item, put it in a place where it is wide and has enough room for your helicopter to prevent scratching or unwanted pressing on the item.

There are many types of RC helicopters to choose from if you want to buy one. The Mini RC Helicopters are the smallest, inexpensive, and very durable. It's better to start with a smaller helicopter first as you begin to practice to control the RC toy. The Coaxial Helicopters are more complicated to control since it has 4 channels to control. This one is good for those who want to develop a hobby for flying helicopters. If you've already developed a flying skill, then the 3D Helicopter is the one for you, since it can perform a lot of new tricks and acrobatic moves.


Source : EzineArticles

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