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Cell Phones Introduction

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Leo Norcross

on 26 September 2013

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Transcript of Cell Phones Introduction

Cell Phones Introduction

Cell phones are a type of radio but are more complex so they work like radio, there are different types of radios they are:

A radio in a car this is a simplex system, which means the radio talks to you but you cannot speak back, it’s a one-way system

Half duplex
A walkie-talkie is a half duplex system, which means that you can talk to each other but only one at a time

Full duplex
A cell phone is a full duplex system, which means that you can talk to each other at the same time.

Areas are divided into a grid and each area has a cell phone tower that transmits your message/phone call or receives the message/phone call
Problems with setting up cell phones?

What were the difficulties with setting up cell phones
It took lots of money and labour to construct cell phone
towers everywhere. The average cell phone tower has a
maximum range of 35km which means every 35km there
is another cell phone tower which would cost a lot because
we have cell phone towers in lots of places through out New
Zealand. When cell phones first started
out they were big bulky and heavy, In 1973 the first cell
phone was invited by an employee of Motorola named
Dr Martin Cooper, this phone weighed around at 1 kilogram
at 2 lbs. and it about 30 centre meters. This phone was
capable of having one, half hour call per battery charge.
The price of this phone was around $4000.


The first problem was not really solved because lots of cell phone towers had to be built so that there was phone coverage everywhere. The second problem was solved by advances in technology for example some one would have invented or found a way to build a compact and smaller phone and the phone technology kept getting better from big heavy phones to light small touch screen phones.


The first problems solution was kind of effective
because once all the cell phone towers are built
there will be no need to build. The second problems
solution was very effective because cell phones
now are so advanced and are easy to take care of
and have, cell phones are essential to have for

Cell Phones

Driving and texting is a current problem because people
get distracted on there phones wilts driving because there
texting and phoning people so their attention is divided
and these people are not focusing on the road as much as
they should be and they get injured or killed or they injure
and kill other people. Around 37,000 people die from car
crashes every year around the world and in New Zealand
there are nearly 200 deaths from car crashes and this is
drivers, passengers, motorcyclists, pedestrians and
cyclists and cell phone distraction has contributed to 446
vehicle crashes, claimed 34 lives and injured 587 people
since 1995 in New Zealand.


New Zealand has banned being on your phone and driving on November 1st 2008. This meant that any drivers using mobile phones would be liable for a fine of $80 and 20 demerit points There were 25 fatal crashes and 482 injury crashes between 2003 and 2008 where the use of a cell phone or another mobile device was a factor.


It was not very effective because it hasn’t changed much, my own parents mostly my father uses his phone whilst driving which is not very good and it is dangerous but my brother has never gone on his phone whilst driving even though two thirds of young drivers admit to being on their phone while driving according to stuff.co.nz.


Cell phones could be a cause of cancer. The issue first came to
public attention in 1993, when a man from Florida was on a TV
talk show and had made the claim that his wife's brain tumour
was caused by radio frequency radiation from her own cell phone.
Since 1993 there have been many testimonies in the media that
cell phones cause cancer. The amount of radio frequency
someone is exposed to depends on a couple of factors:
• The distance from the base station
• The length of time and frequency of cell phone use
• The age of the phone due the fact that older models of phones
emit more radio frequencies than newer ones.

A solution that has come up is that you should use some sort of device to use whilst calling because holding the phone to your head is where the issue occurs and once the phone is a small distance away the radio frequency waves dissipate. So using wired headphones, wireless headphones, a Bluetooth headset, hands free car system or putting your phone on speaker all help because they are putting the phone away from your head.


This solution is very effective because by the time the radio
frequency waves get to you they are very weak and do not
do much damage to you.


In conclusion cell phones are a great and complex communication tool, but they come at a cost. Cell phones cost a fair bit of money and are easy to break, cell phones also help to claim lives in driving incidents and they can cause cancer and tumours. I recommend still having or buying still having a cell phone but be cautious when using one that you try to keep it away from your head and don’t text whilst driving and only call people with a hands free device set up in your car.

Factor 1
The development of cell phones has had both positive and negative effects on socializing.

It has revolutionized communication and made communicating so much easier. Communication before cell phones was a lot of effort you would have to send a letter, a telegraph, a one way radio, smoke signals, carrier pigeons, horse back mail and more.

It has saved lives of people in danger wether they were stuck somewhere and needed help and phoned some one or in a extremely lucky case this mans phone stopped a bullet that would have hit a vital organ.

It has made people antisocial. People are looking at there phones instead of talking to each other or some one wether its on a bus in a car having a meal.

People are bullying through texts because it’s easier and doesn’t take half the guts to do it to someone in real life and it is quick and easy which is bad for victims of bullying.

Factor 2
The development of cell phones has had both positive and
negative effects on the environment.

Some phone companies like Vodafone have a recycling phones
system where they take all old phones and phone accessories
and donate them to Starship hospital.


Cell Phones require fossil fuels which is burnt up and emitted
into the air which damages the planet and will help with global
warming a phone also needs some amount of hazardous
materials to create that can damage the planet.

Cell Phones are places are dumped all the time and so many of
them in places like Ghana, India and China, once at these places
children pile e-waste into giant mountains and burn it so they
can extract the metals, copper wires, gold and silver threads.

Cell Phones and Cancer Risk - National Cancer Institute. (n.d.). Comprehensive Cancer Information - National Cancer Institute. Retrieved September 25, 2013, from http://www.cancer.gov/cancertopics/factsheet/Risk/cellphones
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Texting and driving statistics. (n.d.). Texting and driving statistics. Retrieved September 24, 2013, from www.stuff.co.nz/343974/Texting-and-driving-statistics-staggering
Vodafone's rural cell tower costs questioned - Steve Rieger, Vodafone, Jon Brewer - Computerworld New Zealand. (n.d.). Computerworld New Zealand. Retrieved September 25, 2013, from http://www.computerworld.co.nz/article/49
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