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Like so many pieces of advanced technology J. R. Richard Astros Jersey , everyone uses a cell phone, but rarely can we explain how it works. If asked to explain, more than likely something about air waves and frequencies will turn up Carlos Lee Astros Jersey , but typically this just adds to the confusion.
Whether they are used for voice or date transmission, cell phones rely on a network (called a "cell", hence the name "cell phone") made of base stations Roy Oswalt Astros Jersey , antennas and electronic equipment. The easiest way to understand cell phone use is considering it an advanced two way radio. When someone speaks into their phone their voice gets converted to radio waves. Next, the radio waves travel until they reach a nearby base station. Then the base station sends the call across the communication network until it reaches its destination--in other words, the person you are calling. Finally Mike Scott Astros Jersey , the person receiving the cell phone call has the base station near them translate the air waves (sent from the first station) into a voice message.
Telephone network's base stations are usually fitted with a microwave antenna. For optimal range they are typically mounted high on a tower or pole. In the early days of car phones each city had one antenna, and as a result, the phone itself required a bigger antenna in order to make a connection up to about seventy kilometers. Another limitation was the limited number of people who could simultaneously use the phone.
One of the keys to understanding the advancements in cell phone technology over the past couple decades is how cell phones seamlessly switch between base stations. One can be in the middle of a conversation with someone and switch back and forth between stations without noticing any interruption in their conversation. When a cell phone conversation goes from one channel to another without a disturbance it is known as a "hand-off".
Given their ubiquity and their ability to reach anyone across the world at any given moment Jose Cruz Astros Jersey , it might surprise people to learn that a key part of cell phone technology is actually low power transmitters. This serves two important purposes. By sending out a less powerful signal it means the cells can reuse the same signals which leads to increased connectivity. Secondly, the lower power transmission requires a smaller battery. It's not hard to see how this has contributed to the ever shrinking cell phone, making it truly portable compared to those of the eighties.
Cell phones are powered by rechargeable batteries. Nickel-metal hybride or lithium ion batteries are the most common battery around. Recently Jimmy Wynn Astros Jersey , many companies have switched to lithium polymer batteries because they weigh less and can be found in different shapes. Below the battery is a tiny chip known as a Subscriber Identification Module, or more commonly known by the acronym S.I.M. card. This is essentially a tiny USB card where your phones memory can be stored. Should something happen to your phone, being able to immediately store your old phones contact information is vital!
Hopefully now you can diminish the confusion when someone asks why their cell phone works!
Internet Users Do A Variety Of Things When Going Online Internet Articles | August 25 Andy Pettitte Astros Jersey , 2013
Cost is the primary reason that holds certain people back from going out and getting an Internet connection in their homes. Cost is also very closely related to how people value the web and what it ca...
Cost is the primary reason that holds certain people back from going out and getting an Internet connection in their homes. Cost is also very closely related to how people value the web and what it can offer to them.
Those who believe that having Internet access is too expensive probably don't fully understand the true potential of the net. Basically, if those who are unaware of this full potential actually found out about the great things that can be accomplished online, they would likely become Internet users themselves. When people can see with their own eyes how beneficial something is Gerrit Cole Astros Jersey , it will catch on like wildfire. This is why those who don't know much about the net should be educated about it.
Many families with young (minor) children at home already understand that it is a necessity. Most of these will have a computer at home that the whole family can use. This adoption of computers into the household happens in families that are both within low and middle income households. It is the lower income internet users that will be most likely to use the web to find a job. This use of access is invaluable and can only do more to increase an understanding of the outside world.
Research has also been done to show that individuals with disabilities will go online for a short time but won't use the web as much as individuals who do not have disabilities. But this concept appears to be changing since there is more and more free information and help available on the web. Individuals who have disabilities tend to be the ones who know about free information and assistance for them when it comes to learning how to do new things. This is because these individuals are typically very familiar with the assistance that government programs can offer them in order to live more fulfilling lives.
Individuals who live in more remote places are generally not as likely to have Internet access compared to individuals who live in larger cities. A primary reason for this is that these folks just don't' know about all of the satellite Internet options available to them. However, these rural residents use the same features of the web that others use, such as taking college courses online. These rural residents therefore have the same kind of access that their city resident counterparts have Jose Altuve Astros Jersey , which means it doesn't matter as much where people live because of the power of the Internet.
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