To understand what Vo Wi-Fi is, you first have to understand two other terms… VoIP and Wi-Fi.VoIP which is the short form for Voice-
Over-Internet Protocol is a facility that allows you to talk to people anywhere in the world through the Internet. Wi-Fi, on the other hand provides low cost Internet access through wireless networking. Places from which you can access this wireless network are called Wi-Fi ‘hotspots’.Wi-Fi has a lot of advantages. Wireless networks are easy to set up, and are inexpensive. If you’ve been in an airport, coffee shop, library or hotel recently, chances are you’ve been right in the middle of a wireless network. Many people also use wireless networking to connect their computers at home, and an increasing number of cities use the technology to provide low-cost internet access to residents. Most recently, the ‘next big thing’ has been to merge Wi-Fi with VoIP, producing one of the oddest terms you’ll ever see, Vo Wi-Fi! This stands for Voice over Wireless Fidelity. This simply means a Wi-Fi based VoIP service – or in even more general terms, a wireless based VoIP system.VoIP over Wi-Fi (Vo Wi-Fi) has great potential as a means of reducing telephony costs.
that will allow super cheap colour screens to be produced. In fact, a company called Lunar Design is planning to bring out these ultra thin mini colour screens that would work on replaceable batteries and which can be controlled with touch sensitive buttons
had just thought about! Is this a coincidence, or could it, perhaps, be a form of communication? Some scientists believe this phenomenon to be a form of communication called telepathy. In telepathy, there is direct transference of thought from one person to another, without using normal sensory channels. The term telepathy was coined by Fredric W.H. Myers, in 1822, from Greek words tele and patheia. ‘Tele’ means ‘remote’ and ‘patheia’ means ‘to be affected by’. The field which studies certain types of paranormal phenomena such as telepathy is called parapsychology. They believe that telepathy is a type of communication, which we haven’t completely explained yet. They are studying various reports about telepathy. But a technique, which shows statistically significant evidence of telepathy on every occasion, has yet to be discovered. This lack of accurate and reliable evidence has led sceptics to argue that there is no scientific basis for the existence of telepathy at all. In short, there is no consensus about telepathy. Para psychologists argue that some instances of telepathy are real. Sceptics say that instances of what seem to be telepathy are explained as the result of fraud or self-delusion.
buzzer or any other continuous tone sound source or by flashes of light from a flashlight or even by puffs of smoke. Dots in the key below represent short signals. Dashes long one.
sound waves strike an object, they are reflected back. The reflected waves are received by the ship, and can be used to ‘draw’ an image of the object and its location on a computer screen.Did you know that the word SONAR stands for Sound Navigation and Ranging?
signals which formed dashes.The Morse code was invented by Samuel F.B. Morse, a painter and founder of the National Academy of Design. He conceived the basic idea of an electromagnetic telegraph in 1832, and produced the first working telegraph set in 1836. This made transmission possible over any distance. The first Morse Code message, ‘What hath God wrought?’, was sent from Washington to Baltimore.
TV sets will have liquid crystal displays like the screens of a hand held computer game. At the same time there will a stunning increase in the number of televisions per household, as small TV displays are added to clocks, and maybe even coffee cups! Who knows… television may even be placed inside books and, before long, books will evolve into no more than hundreds of small flat-screens stapled together!
almost every spaceship launched from earth can be considered a satellite, as it is orbiting either the earth or the sun. Manmade satellites have six main uses. They are used for scientific investigation, earth observation, weather forecasting, navigation and communications. Satellites also have military uses.Satellites orbiting the earth must travel at great speed to avoid being pulled down by the earth’s gravity. Some satellites called geostationary satellites are positioned over areas where they are most needed and are most useful for spying!Communication satellites are earth orbiting spacecraft that provide communication over long distances by reflecting or relaying radio frequency signals. Radio, telephone and television signals are bounced off satellites to cover the greatest possible area. There are hundreds of communication satellites now in orbit. They receive signals from one ground station, amplify them, and them transmit them at a different frequency to another station
programmes from different countries with the help of satellites.Nowadays, direct transmission is done from a satellite, and this is called DBS or Direct Broadcast Satellite technology. In this system your TV set receives the signals directly from the satellite through a special dish aerial that has to be installed. Of course, many homes prefer to have cable TV where the signals reach the TV set through a cable.[custom_search_and_filter]