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Today's tablet computers sport touch screens ranging in size from 7- up to 13-inches. These dimensions are by no means static, and boundaries can be blurred as smartphones get larger displays Features of tablet :- I) Hardware :- 1. High-definition, anti-glare display 2. Wireless local area and internet connectivity (usually with Wi-Fi standard and optional mobile broadband) 3. Front- and/or back- facing camera(s) for photographs and video 4. Lower weight and longer battery life than a comparably-sized laptop 5. Bluetooth for connecting peripherals and communicating with local devices 6. Early devices had IR support and could work as a TV remote controller. 7. Docking station: Keyboard and USB port(s) Note:- Special hardware: The tablets can be equipped with special hardware to provide functionality, such as camera, GPS and local data storage. II) Software :- 1. Mobile web browser 2. Reader for digital books, periodicals and other content 3. Downloadable apps s...

The iPad is not a replacement for a laptop. Tablets are good at many things, but their abilities are a subset of a laptop's. You can't, for example, burn a music CD to listen to in the car, or a DVD of your latest home movie. It isn't particularly easy to print from an iPad, either, although it is possible in some apps (you can print an email, a document or a web page if you have a compatible printer). Features of iPad or Advantages of iPad:   1)Battery life: With an iPad, you'll be freed from the mains all day, since it will last for at least eight (if not 10 or 12) hours of constant use. 2)Portability and comfort: It's more comfortable to sit and use an iPad, it doesn't get too warm and there are no fans, unlike most laptops whose high-pitched fans can drive you to distraction. 3)Touchscreen interface : You can type very fast on the iPad's virtual, on-screen keyboard.The iPad's interface is, in general, hugely intuitive. 4)Instant on and con...

 The heating up of the earth surface due to trapping of infrared radiations reflected by earth's surface by CO 2 layer in the atmosphere is called green house effect. Some major green house gases and their sources: Gas Sources Carbon Dioxide (CO 2 ) 1)Fossil fuel combination (coal,oil,natural gas) 2) Deforestation and land use changes Methane (CH 4 ) 1) Enteric fermentation in cattle and insects. 2) Biomass burning and garbage land fills 3) Leakage of gases from coal mines and natural gas. 4) Rice paddies 5) Swamps and tundra Chloro fluoro carbon (CFC'S) 1) Plastic foams 2) Refrigeration and air-conditioning 3) Aerosols (spray propellants) CFC' 4) Industrial solvents Nitrous oxide (N 2 O) 1) Fertilizer use 2) Fossil fuel combustion 3) Biomass burning 4) Changing land use An increase in average temperature  of the earth's atmosphere due to green house effect which can have effects on climate and key life, support system of planet. An ...

Definition Logarithm : If m= a x , where a>0 ,a not equal to 1 , m>0 then x is called the logarithm of m to the base a and is written as x = log a m, where m, a, x are real numbers. Laws of logarithms: 1. Law of Product: log (A.B) =log A +log B 2. Law of Quotient : log(A/B) =log A - log B 3. Law of Exponent : log m n = n log m Properties: 1)We have m = a x if and only if x = log a m. 2)Logarithms of negative numbers and zero are not defined. 3) a 0 =1 Hence, 0 = log a 1 i.e. logarithm of 1 to any base is always zero. 4) a 1 =a Hence , 1 = log a a i.e. logarithm of any number to the same base is 1. 5) x = log a a x 6) If log a m = log a n then m = n 7)If a>1 and m>n then log a m > log a n and conversely. Write logarithm form: 1) 5 3 = 125 Solution: 3 = log 5 125   (By definition of logarithm) 2) 8 3 =512 Solution: 3 = log 8 512   (By definition of logarithm) Express in exponential form: 1) log 2 128 = 7 ...

Difference between Static RAM Dynamic RAM. Static RAM Dynamic RAM 1. SRAM 1. DRAM 2. It retains it levels so no require refreshing 2. It requires some refreshing. 3. Power consumption is more 3. Power consumption is less. 4. Speed is fast. 4. Speed is less. 5. Package density is low. 5. Package density is high. 6. Size can't be increase. 6. Size can increase. 7. More expensive. 7. Less expensive. 8. Made up of 6 CMOS transistors(MOSFET). 8. Made up of a MOSFET and a capacitor. Difference between RISC and CISC processors/controllers. RISC CISC 1. It stands for Reduced Instruction Set Computing. 1. It stands for Complex Instruction Set Computing. 2. Lesser number of instructions. 2. Greater number of Instructions 3. Instruction pipe-lining and increased execution speed. 3. Generally no instruction pipe-lining feature. 4. Orthogonal instruction set. 4. Non-Orthogonal instruction set. 5. Operations are performed on register only, the only memory operations ...