Satellite Radio Systems Satellite radio is an idea over a decade in the making. In 1992, the U.S. Federal Communications Commission (FCC) allocated a spectrum in the “S” band (2.3 GHz) for nationwide broadcasting of satellite-based Digital Audio Radio Service (DARS). Only four companies applied for a license to broadcast over that band. The FCC […]
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The first option in loss prevention involves the use of deterrents such as security guards, observation mirrors (that allow store clerks to see throughout the store) and closed-circuit television (CCTV) surveillance systems. Most large stores use some combination of these techniques, which were among the earliest tools used to combat shoplifting. Smaller businesses, unable to
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2-D Trilateration Imagine you are somewhere in the United States and you are TOTALLY lost — for whatever reason, you have absolutely no clue where you are. You find a friendly local and ask, “Where am I?” He says, “You are 625 miles from Boise, Idaho.” This is a nice, hard fact, but it is
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The Fusion Draw While you might think of glass in its manufactured form, the truth is it’s a material we find in nature. Certain rocks and minerals become glass after coming into contact with high temperatures. This occurs naturally along lava flows and places where lightning has hit the ground. Humans have been creating glass
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Google Voice Functions and Features Google Voice’s defining feature is the ability to use one phone number in place of all your existing ones. However, your Google Voice number doesn’t replace your other phone numbers. Think of it as an operator who routes your calls to all your phones for you. It works like this:
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Comparing High-definition Digital Video Cameras Like standard digital video cameras, high-definition digital video cameras (or camcorders) come in many sizes, price ranges and capabilities. One of the bigger differences you’ll want to pay attention to is the camera’s storage method. HD digital video cameras have four main storage formats: MiniDV tape is similar to other
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Massage Chairs: The Mechanical Massage Most massage chairs rely on a combination of motors, gears, rollers and vibrating mechanisms. This kind of chair dates back more than half a century. Over the last few decades they’ve become much more sophisticated. The simplest massage chairs use a series of vibrating surfaces to provide a massage. To
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Slingbox Software Slingbox works in conjunction with the SlingPlayer software you install on your computer. Together, they “sling” NTSC or PAL video data to another location. It works with regular TV, satellite TV, cable TV, a DVD player, DVR or camcorder. It also works with Apple TV boxes and iPods that are docked in either
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Mechanics of the FoodSaver System As you may have imagined, the FoodSaver System uses a vacuum device to remove air surrounding the food or drink you want to preserve. As with any vacuum, air is moved from one place to another, which creates a drop in pressure at one point and an increase in pressure
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Surge Protection A standard surge protector passes the electrical current along from the outlet to a number of electrical and electronic devices plugged into the power strip. If the voltage from the outlet surges or spikes — rises above the accepted level — the surge protector diverts the extra electricity into the outlet’s grounding wire.
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