USB 2.0 vs. USB 3.0

USB 2.0		USB 3.0
Released	April 2000	November 2008
Speed	High Speed or HS, 480 Mbps	10 times faster than USB 2.0. Super Speed, 4.8 Gbps.
Signaling Method	can either send or receive data.	can send and receive data simultaneously
Price	the USB 2.0 version is generally less expensive than it's USB 3.0 version.	the USB 3.0 version is generally more expensive than it's USB 2.0 version.
Power Usage	Up to 500 mA	Up to 900 mA. .
Number of wires within the cable	4	9
Standard-A Connectors	Grey	Blue
Standard-B Connectors	Smaller in size	Extra space for more wires
Max Cable length	5 meters	3 meters

NFC

It is a wireless connectivity technology that allows convenient short-range communication between electronic devices. NFC connects all type of communication devices and allow easy communication between them.

Advantages

it is a secure gateway to the connected world, now NFC-enabled mobile devices will allow consumers to store and access all kinds of their personal data at home. they can easily do this by bringing two NFC devices close, they at once initiate network communication without the help of user to make them do so. NFC-enhance devices can easily exchange and store your personal data like messages, pictures, MP3 files, etc. providing ease of use, instant intuitive connectivity, zero configuration and smart key access, NFC fulfils all the needs of connected consumers and provides better networks services for phones.

Cell phone vs Landline

BENEFITS OF A CELL PHONE

Here you will learn if either cell phones are better or landline is better so by reading the points below you will get to know which is better.

Mobility:  this is very obvious and you experience it in your daily life that a mobile phone can be carried anywhere  you want whereas a landline cant be taken anywhere the reason being that it always needs a base unit to connect it and make a call. and a mobile phone can be carried anywhere and you can make calls from anywhere you are no matter what.

Functionality:  this is very obvious that the functionality of a mobile phone is much more than a landline. by using a phone you can text, send voice mail, take pictures, make calls, use internet, GPRS, different kind of apps and many more but a landline can only make calls.

Cost: A mobile phone may be more cost efficient because if offers its users different kind of packages whereas a landline does not provide any such kind of packages.

BENEFITS OF A LANDLINE

 

Reception: Even though a mobile phone has become very efficient and convenient in use but still a phone does not provides a clear reception and smooth phone calls as a landline.

Family: some people don't want to buy their kids a cell phone because of some kind of personal reasons but they at the same time want to stay connected with them so a landline is a very good way of doing so.

Emergencies: in an emergency case you can easily dial 911 and the authorities will get to know your location at the very instant but if youre calling them using a cell phone it will be difficult and time taking for them to locate you.

 

WiFi VsWimax

Wi-Fi products are used to build WLANs, while WiMAX products are used to build WMANs.

A Wireless Local Area Network (WLAN) is a group of devices linked together by wireless within a relatively small space like a single office building or home. Three WLAN technologies were included in the original 802.11 standard: Infrared, Frequency Hopping Spread Spectrum (FHSS), and Direct Sequence Spread Spectrum (DSSS). 802.11b focused exclusively on DSSS; 802.11a/g/n also used Orthogonal Frequency Division Multiplexing (OFDM).

Wi-Fi is a certification applied to 802.11a/b/g/n products tested by the Wi-Fi Alliance, an industry consortium that promotes interoperability in heterogeneous WLANs. For example, all 802.11g products implement standard OFDM and DSSS, but only Wi-Fi certified products have proven that they correctly support a mandatory subset of features and options.

To create a WLAN, enterprises, small businesses, and home owners can purchase Wi-Fi certified Access Points (APs) and clients (laptops, phones, printers). Clients must be no more than a few hundred feet from the closest AP. Larger buildings can be covered by installing multiple APs that are connected to each other. Most WLANs are deployed indoors, but WLANs can also cover parking lots or courtyards or other local outdoor areas.

Wireless Metropolitan Area Networks (WMANs) use wireless "last mile" technologies to connect subscriber stations (customer premise equipment) to base stations (carrier network infrastructure), providing a wireless alternative to wireline Internet access technologies like DSL, cable, or fiber.

802.16 standards define several WMAN technologies that operate at various frequencies, distances, and speeds to deliver Broadband Wireless Access (BWA). The original 802.16 focused on Fixed BWA, using point to point wireless uplinks to connect subscriber networks to carrier networks and the Internet. More recently, the 802.16e amendment defined Mobile BWA to serve subscriber stations that are not fixed in place, like laptops used in cars and trains.

WiMax is a certification applied to 802.16 products tested by the WiMAX Forum. Carriers build and operate WMANs by purchasing licensed spectrum and then deploying WiMAX base stations throughout a city, region, or other designated coverage area. To use the WMAN, subscribers must purchase wireless services from a carrier. For example, Sprint recently launched a commercial WiMAX service called XOHM in Baltimore. Consumers in and around Baltimore that want to use XOHM must purchase a compatible WiMAX device and pay Sprint for air time.

Here are some key differences between WLANs and WMANs, supported by Wi-Fi and WiMAX products:

1        It's possible to use WMAN technology indoors, but 802.16 protocols are optimized for outdoor operation. It's possible to use WLAN technology outside, but 802.11 protocols were primarily designed for indoor networks.

•         Larger WLANs can be constructed using many densely-spaced Wi-Fi APs, but to blanket miles of territory with wireless, you really want to create a WMAN technology. On the other hand, using WiMAX products for communication between PCs inside the same building would be pricey and impractical -- that's precisely what WLAN technologies were created for.

•         Most office and home WLANs are composed of Wi-Fi products operating in unlicensed spectrum -- channels freely available for use by anyone. WiMAX products most often operate in spectrum licensed to wireless carriers who use them to deliver commercial BWA services.

For nuts-and-bolts differences, check out Michael Finneran's excellent paper on WiMax versus Wi-Fi.

The bottom line is that WLANs and WMANs are complementary network architectures, supported by standard technologies that were designed for very different environments and purposes. This is why your next laptop may well include both Wi-Fi and Mobile WiMAX adapters. Use the Wi-Fi adapter to connect to your office or home WLAN free-of-charge, but use the WiMAX adapter when you're on the go to reach the Internet through a carrier's WMAN.

 

Bluetooth Vsinfrared

Infrared technology is used in remotes. the more the strength of the remote the more the infrared rays can travel, but for household electronics the range is less then 50 feets. in order to have a signal detected there should be a straight line between the transmitter and the receiver. If there is a wall or large object between the transmitter and receiver than  the signal will not pass through it.

Bluetooth  uses a radio frequency, which allows transmission of infrared signal through walls and other big objects. The range  Bluetooth device is about 30 ft. Because Bluetooth technology is based on a standard 2.4 GHz frequency, different Bluetooth devices can easily communicate with each other, regardless of the manufacturer. this means that it can be of any company not necessary Samsung or acer or any other manufacturer. 
While Bluetooth is well on its way to replacing infrared in many different areas, the technology is not meant to be used for wireless networking. Instead, wifi technology, which has a larger range and higher bandwidth than Bluetooth, is the standard that most wireless networking equipment uses to compare.

Side Effects of facebook

facebook is a social networking site. it has reduced the distance between people to a great extent but at the same time it has many adverse effects too. some parents allow their children to use facebook and they get involved in wrong activities without their parents knowledge and hence create troubles for themselves and others too. people keep on posting silly statuses and when some one else see them they develop envious and jealous feelings which results in the destruction of the peace of their mind and the society. many fake accounts are made and people are targeted. so the use of facebook should be avoided as it leads to many problems if not used in a right way. 

Difference between 3G and 4G

	3G	4G
Data Throughput	Up to 3.1Mbps	2 to 12 Mbps .
Peak Upload Rate	5 Mbps	500 Mbps
Peak Download Rate	100 Mbps	1 Gbps
Switching Technique	packet switching	packet switching, message switching
Network Architecture	Wide Area Cell Based	LAN and Wide area.
Services And Applications	CDMA 2000, UMTS, EDGE etc	Wimax2 and LTE-Advance
Forward error correction (FEC)	3G uses Turbo codes for error correction.	Concatenated codes are used for error corrections in 4G.
Frequency Band	1.8 – 2.5 GHz	2 – 8 GHz

How to block a site

How do u block a website on your PC ??

I use Facebook on my office PC, but i have a habit to remain Logged in, even why i shutdown my PC.So in my absence if anyone has turned ON my pc & accessed Facebook, then that would be a problem for me.

So what i can do is, I can block certain websites, so that nobody can access it. Here is an easy way of doing so. blocking a site.

 

Go to

C:\Windows\System32\drivers\etc

you will see a file named HOSTS.

Open it with NOTEPAD.

Then search for the line 127.0.0.1 localhost

To block the website facebook.com for example, add this text under 127.0.0.1 localhost:

127.0.0.1 www.facebook.com

You can add as many sites as you want, but do not forget to prefix it with "127.0.0.1".

6. Save the file

Now Facebook will get blocked in all web browsers

Tips to enhance the system speed

1.Let your PC boot up completely before opening any applications.

2.Refresh the desktop after closing any application. This will remove any unused files from the RAM.

3.Do not set very large file size images as your wallpaper. Do not keep a wallpaper at all if your PC is low on RAM (less than 64 MB).

 

4.Do not clutter your Desktop with a lot of shortcuts. Each shortcut on the desktop uses up to 500 bytes of RAM

5.Empty the recycle bin regularly. The files are not really deleted from your hard drive until you empty the recycle bin.

6.Delete the temporary internet files regularly.

7.Defragment your hard drive once every two months. This will free up a lot of space on your hard drive and rearrange the files so that your applications run faster.

8.Always make two partitions in your hard drive. Install all large Softwares (like PSP, Photoshop, 3DS Max etc) in the second partition. Windows uses all the available empty space in C drive as virtual memory when your Computer RAM is full. Keep the C Drive as empty as possible.

 

9.When installing new Softwares disable the option of having a tray icon. The tray icons use up available RAM, and also slow down the booting of your PC. Also disable the option of starting the application automatically when the PC boots. You can disable these options later on also from the Tools or preferences menu in your application.

10. Protect your PC from dust. Dust causes the CPU cooling fan to jam and slow down thereby gradually heating your CPU and affecting the processing speed. Use compressed air to blow out any dust from the CPU. Never use vacuum.

RAM IS THE WORKING AREA (DESKTOP) OF THE CPU, KEEP IT AS EMPTY AND UNCLUTTERED AS POSSIBLE!

Port in computing

 

1. An Internet port is a number that tells what kind of protocol a server on the Internet is using. For example, Web servers typically are listed on port 80. Web browsers use  port when accessing web pages by default, but you can also specify what port you would like to use in the URL like this: http://www.excite.com:80.

 2. A hardware port are the ports which are at the back side of the CPU where a keyboard, a mouse , speakers can be plugged.

 

3. The verb port is used for editing of a software program's code so that it can run on another platform.

How to turn off auto correction in ipad

Sometimes it becomes very irritating when you have to cancel wrong words predicted again and again. iPad allows you to disable Predictive text if it is annoying you.

1  Go to Settings > General > Keyboard.

2  Select ‘Auto Correction’ and turn it OFF.

Turning Auto Selection off will automatically disable ‘Check Spelling’ feature

Sont A5100 Camera

     this sony camera has APS-C sensor, the Sony A5100 is an intriguing proposition. it has the feature of dual video recording, which is the ability to record two different videos at a time. it is small in size and the picture quality is totally adorable. if image quality and portability are your major concerns then this camera is best.
      It Is very small comfortable in holding and is portable. New dual video record function, Quick autofocus and good dynamic range. besides its pros there are a few of its cons too and they are that it Lacks an EVF and external mode dial, No hot shoe, JPEG processing at higher ISOs not as good as some competing mid-level models.

sony A77 ||

The Sony A77 II's image quality is very good, especially at lower ISOs and at higher ISOs from RAW, burst shooting performance is top-notch, and single-shot AF is fast.Though it misses the mark in one main area, its a very nice, well-rounded camera in most other areas. it is 24.3 megapixel camera. It has the following features:
  

 offset micro lenses

12fps continuous shooting with autofocus

79 point AF module with 15 cross-type AF points, covering 40% of frame

Increased control over AF behavior

Audio level monitoring during movie shooting

2.4M dot OLED viewfinder

Pull-out three-hinge tilt/swivel 1.23m dot White Magic LCD screen

Built-in Wi-Fi with NFC

1/8000th maximum shutter speed

ISO 100 - 25,600

Auto ISO customization

Optional, profile-based correction of chromatic aberrations and geometric distortion

Top panel LCD

Stereo microphone and external mic socket

AF Micro Adjust

 

Avo aquarium

Avo, is a self cleaning fish tank. it cleans the water inside it automatically. Avo’s natural filter takes harmful ammonia from fish waste and turns it into nitrate, which fertilizes the environment’s plants and keeps the water clean. The fish tank also has an  moving bed filter, which makes it difficult for typical aquarium gunk to build up. the water never needs to be changed. Avo beautifies the aquarium it has 7 different  plant pots surrounding its centrally located filter. which means that they're on its sides covering the circular wall of the aquarium. The pots can be easily removed for plant trimming or to change existing plants. it can hold up to 15 liters of water.
       Avo’s plant specific LED lighting which is right above the aquarim is designed to prevent algae growth while ensuring your plants continue to thrive and cleanse the water. The light will appear in three soft colors which represents the three peroids of a day like daytime, night, morning. while providing key conditions for photosynthesis and plant growth. its temperature is fixed it will stay at 27 degrees at all times.

Intel 2 in 1

intel introduces two in one  which means that a laptop along with a tablet in one device. It is a powerful 2 in 1 laptop and tablet fun. It has immersive graphics.  It instantly becomes active with just a single touch of button. It include PC ability with tablet longevity now you can enjoy up to 10 hours on a single charge in a thin and light 2 in 1 form factor for work and play on the go. It has up to 10 hours battery life. it has an amazing intel processor.
Thin, light, with the full performance of a laptop, plus the fun of a tablet and long-lasting power.

Ipad Pro

 ipad pro has a  12.9-inch Retina display and refined Multi‑Touch technology. It’s not just larger. ipad pro helps you be more productive.
it has the highest retina resolution than any other apple device. its retina resolution is 5.6 million pixels. it has a 12.9‑inch screen that makes  everything you do even if it is  editing video, designing presentations, running a business  and any other work. iPad Pro has a variety of built‑in apps. And on the App Store, you’ll find incredible apps designed just for iPad so you can use the existing apps as well as download more apps.
iPad Pro has thumbprint lock system instead of forgettable passwords. So you can unlock your device with just a touch and keep your personal data safe always even your friend is using it. It has two high quality cameras that captures your lovely moments. It has fast wireless quality. So enjoy it with new Ipad pro.

home tempreature monitoring

home temperature monitoring is a temperature sensors are devices which sense the temperature of inside of a house. most people use temperature sensors for security purposes. as the temperature increases the range of the temperature sensor it starts to beep and the people get to know that something is wrong. they are a kind of warning alarm. when a temperature moni
toring device beeps beeps its up to the person to call the fire fighters accordingly to the situation. they play an important role in the security of the house.

Digital Photo Frame

     A Digital photo frame is a picture frame that displays digital photos without the need of a computer or printer. digital photo frames are generally designed for the display of photographs.
     Digital photo frames come in a variety of different shapes and sizes with a range of features. Some may even play videos as well as display photographs some may play a song whilst the pictures are moving. This is a frequently asked question that how it displays different pictures are they loaded in it? No, the answer to this question is very simple we connect a USB loaded with pictures in it. And the digital photo frame keeps on displaying the pictures

Vein Identification

Another technology invention is the biometric identification and security device known as Palm Secure. It works by identifying the vein pattern of the palms of anyone's hand who places his hand on the device. Similar to our fingerprints, vein patterns are unique to each individual as everyone has different fingerprints  the same way every individual has different veins pattern. The advantages of this technology is that it is less expensive, easier to manage, and is more reliable than other methods of identification.

Samsung SUHD TV

Samsung SUHD TV is a TV introduced by Samsung. it delivers superior picture quality with amazing  contrast, striking brightness and spectacular color. Samsung SUHD TV has many additional features than its previous models its SUHD re-mastering engine delivers an amazing viewing experience. its stylish curved design provides viewers with a more better viewing experience and it is powered by Tizen, its screen is curved and hence is more attractive for its viewers. Its picture quality is unmatched. it gives the viewers a superior quality experience.
The SUHD engine automatically interprets the brightness of images on the screen to minimize additional power consumption.  it  expresses ultimate contrast levels, producing images with 2.5mm ore brightness and twice the color adjustment points for more good picture quality.