Archive for category Cell Phone
PDA- Make the Best Out of this Cool Gadget
Posted by ariyes in Cell Phone on December 22nd, 2009
Personal Digital Assistants in short PDA are portable, lightweight computers used mainly as a personal electronic organizer. A number of names are there by PDA goes by; a more trendy name is the Palm computer. Some of this cool Personal Digital Assistants (PDA) arrives with an electronic pen that is used for the purpose of data input. Applications like the word processors, spreadsheets, calendars, alarms, address book etc. are included in the PDAs. These are prominently used as the appointment schedulers and also for the purpose of receiving and sending data via e-mail.
PDA was first introduced in the year of 1983 and it was actually showcased along with a black and white screen but, these days, majority of the ones found in market are in colour. They arrive with good bit of audio capabilities and can be made to use as cellular phones and as well as media players. Of late, PDA’s can also be used for web browsing.
PDAs arrive with the advanced touch screen technology and slots for memory cards for the purpose of data storage and they also arrive with some more connectivity options like the Bluetooth, Infrared and even the very latest Wi-Fi technology. In spite of the fact that majority of the PDA’s arrive with the advanced touch screen technology, PDAs with alpha-numeric keyboards are also found in abundance. This will aid those greatly who still likes giving data as input via the keyboard.
This particular electronic organizer provides enormous advantages to its users. These small pieces of dynamites are also very useful in industries like the automobile navigation, Medical science, sports, etc. They are also used with GPS receivers in the cars with a view to automotive navigation. Of late, PDAs are also being fitted inside a car that greatly helps the display dynamic routing, the traffic conditions.
PDAs are really very useful for the Doctors and the medical professionals for the purpose storing huge databases of drugs, significant information in regard to treatment provided to the patients.
PDAs are also pretty useful in the education. A lot of the schools and the colleges have included PDAs straight into their education policy. PDAs are hugely made to use by students in some of the countries with a view to take important notes in classes. Of late, textbooks are published as the e-books that can be uploaded to these cool gadgets pretty easily; this hugely reduces the book load from the students shoulder. It will be more than enough to just carry a PDA instead of carrying a bag full of books. A lot of the educational software like the encyclopaedia, dictionary, etc. are on offer and can also be uploaded inside the PDAs that will be pretty handy for both the students and the teachers.
The Invisible Cell
Posted by admin in Cell Phone on January 30th, 2009
What do you mean by cell? – If not a biology student, you won’t be able to answer this question. If you have a minimum knowledge about biology, you will start to block my ear with the nutty definition which you successfully memorized during the so called glorious student life!
Then if I ask another question, name one modern invention of science which is kept alive by an invisible cell placed outside of its body? Funny question! Rocking chair!? Hey man, not a joke at all, it’s our mobile phone, always with us… so lets know this funny thing…
Mobile cell is an area of radio coverage from one BTS (Base Transceiver Station), you will find in your area commonly, the high rise towers as piercing the sky!
It is the smallest building block in a mobile network (think it’s as an interlinked spider web!) and is the reason why mobile networks are often referred to as cellular networks. Typically, cells are represented graphically by hexagons (oh! It’s an area covered by six same length hands without any gaps in between!)
Usually these cells are of main two types:
1. Omni Directional cell: An omni directional cell (omni cell) is served by a BTS with an antenna which transmits equally in all directions (360 degrees).
2. Sector Cell: A sector cell is the area of coverage from an antenna which transmits in a given direction only. For example, this may be equal to 120 degrees or 180 degrees of an equivalent omni directional cell. One BTS can serve one of these sector cells with a collection of BTSs at a site serving more than one, leading to terms such as two-sectored sites and more commonly, three-sectored sites.
Typically, omni directional cells are used to gain coverage, whereas sector cells are used to gain capacity.
The border between the coverage areas of two cells is the set of points at which the signal strength from both antennas is the same. In reality, this line will be determined by the environment, but fro simplicity, it is represented as a straight line.
If six BTSs are placed around an original BTS, the coverage area- that is, the cell- takes on a hexagonal shape.
This cell planning begins with traffic and coverage analysis. The analysis should produce information about the geographical area and the expected capacity. The types of data collected in this issue are: cost, capacity, coverage, Grade of Service (GOS), Available frequencies, speech quality, and system growth capability.
The geographical distribution of traffic demand can be calculated by the use of demographic data such as: Population distribution, Car usage distribution, Income level distribution, Land usage data, telephone usage statistics, and other factors, like subscription/call charge.
So? Got idea about the invisible cell? …