Tech Agama

A smartwatch is a wristwatch with screen and the ability to do much more than tell you the time.They are wearable comuputers,that can  run mobile apps, using a mobile operating system. They can be used as portable media players, with FM radio and playback of digital audio and video files via a Bluetooth or USB headset. Some models, also called 'watch phones', feature full mobile phone capability, and can make or answer phone calls or text messages. Smartwatches have an electronic visual display,a rechargeable battery and touchscreen. Peripheral devices  include digital cameras, thermometers, accelerometers, altimeters, barometers, compasses, GPS receivers, tiny speakers, and SD card .Software include digital maps, schedulers and personal organizers, calculators, and different watch faces. It supports wireless technologies like Bluetooth, Wi-Fi, and GPS. How do they work?? Watches can cooperate with an app in a smartphone to carry out their functions,for which the...

A SIM - short for Subscriber Identity Module - is a piece of plastic that slots into your  mobile phone.It acts as your unique ID and helps you  connect to, make calls over  a particular mobile phone network.Most SIM cards have a capacity between 32 to 128 KB.They store contacts and messages which can be transferred easily from one mobile to another. SIM also stores the ‘key’ needed to decrypt data that is encrypted when voice is trransfered from a phone to another.A unique ID called the IMSI (International Mobile Subscriber Identity)  is used to connect someone calling your mobile number to your phone. GSM phones are the ones that utilize SIM cards .The most important bits of data include the IMSI (International Mobile Subscriber Identity) and the authentication key that validates the IMSI. This authentication key is provided by the carrier SIM authentication goes like this: On startup, the phone obtains the IMSI from the SIM card and relays it to the network,k...

Processor  Smartphones are built with a system-on-a-chip architecture that combines all functions into a single  piece of silicon.  Processor speed is measured in terms of MegaHertz or GigaHertz. Processors can be overclocked, to improve performance or underclock to reduce performance and benefit of battery life.  Dual-Core processors are powerful processors with two cores‌ in a chip.  The famousm1GHz processors complete system tasks and hardware multimedia acceleration at high clock speeds ,with low power consumption. They  also work with the phone’s software to decode high definition video and ensure faster, smoother Web browsing.A processor's speed in GHz, refers to the speed of the processor's internal clock. Every time that the clock ticks, the processor can execute an instruction or read and write data. A 3.0 GHz processor has 3 billion opportunities per second to do a task.Enternal clock speeds  tell how fast the processor can communicat...

Light Fidelity or Li-Fi is a Visible Light Communications (VLC) system running wireless communications travelling at very high speeds..As more and more people and their many devices access wireless internet, clogged airwaves  make it difficult to latch onto a reliable signal. But radio waves are just one part of the spectrum that can carry our data. What if we could use other waves to surf the internet?A new  technology uses a part of the electromagnetic spectrum that is not greatly utilized- The Visible Spectrum.The solution,called as “Data Through Illumination”—taking the fiber out of fiber optics by sending data through an LED light bulb that varies in intensity faster than the human eye can follow.D-Light, can produce data rates faster than 10 megabits per second, which is faster than average broadband connection.Hence LED lamps that can light a room as well as transmit and receive information. It is possible to encode data in the light by varying the rate at which the ...

Virtual reality is an artificial three-dimensional, computer generated environment which can be explored and interacted with by a person. .It  refers to a  type of reality emulation.  That person becomes part of this virtual world and whilst there, is able to manipulate  objects or perform a series of actions. Virtual realities artificially create sensory experiences, which can include sight, touch, hearing, and smell. There are a range of systems that are used for this purpose, such as headsets, omni-directional treadmills and special gloves. These are used to actually stimulate our senses together in order to create the illusion of reality. There are a wide variety of applications for virtual reality which include: Architecture,Sport,Medicine,Arts,Entertainment. From trainee fighter pilots to medical applications trainee surgeons, virtual reality allows us to take virtual risks in order to gain real world experience. Virtual reality systems  allows a ...

Well, you  reading this article shows you are using web browser, presenting this article content in a rich text/graphical format on your screen. A web browser  is an application software that  provides access to the World Wide Web. It fetches the web pages from the server along with the necessary files like, images, flashes, videos etc, interprets them and then displays it on the screen. On  simply typing the URL (Uniform Resource Locator) of a webpage in the address bar , the browser will bring the web page on your screen.Initially, user inputs a Uniform Resource Locator (URL), for example http://www.fb.com/, into the browser. The prefix of the URL, the Uniform Resource Identifier or URI, determines how the URL will be interpreted. The most commonly used kind of URI starts with http: and identifies a resource to be retrieved over the Hypertext Transfer Protocol (HTTP).Other prefixes are https: for HTTPS, ftp: for the File Transfer Protocol, and file: for local file...

Cloud Computing - delivering hosted services over the Internet. Cloud computing is getting IT services, such as email, customer relationship management or web conferencing, over the internet.Instead of buying hardware and software up front, you pay a monthly charge based on the number of users.In simple words,when you  type a query into Google, the computer does nothing with regards to answer, it's just a messenger. The words you type are sent over the Net to one of Google's numerous clustered PCs, which find  your results and send them promptly back to you. The real work in finding your answers might be done by a computer sitting in California, Dublin, Tokyo, or Beijing!!Preparing documents over the Net is a newer example of cloud computing. Simply log on to a web-based service such as Google Documents and you can create a document, spreadsheet or presentation. Instead of typing your words into a program like Microsoft Word or OpenOffice, running on your computer, you're...

Google's search engine is a powerful tool,making it practically possible to find the information you need when you browse the Web. Google uses automated programs called spiders or crawlers, which finds and retrieves pages on the web and hands them off to the Google indexer. Google has a large index of keywords This index is sorted alphabetically by search term, with each index entry storing a list of documents in which the term appears and the location within the text where it occurs. This data structure allows rapid access to documents that contain user query terms.To improve search performance, Google ignores (doesn’t index) common words called stop words (such as the, is, on, or, of, how, why, as well as certain single digits and single letters) .How Google ranks search results , determines the order Google displays results on its search engine results page (SERP). Google uses a trademarked algorithm called PageRank, which assigns each Web page a relevancy score. A Web pag...

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Mobile number portability (MNP) enables mobile telephone users to retain their mobile telephone numbers when changing from one mobile network operator to another. Mobile number portability is implemented in different ways across the globe. The International and European standard is for a customer wishing to port his/her number to contact the new network (recipient), which then sends the number portability request (NPR) to the current network (donor). This is known as "recipient-led" porting. The UK and India are the only exceptions to implement the donor-led system. The customer wishing to port his/her number is required to contact the donor to obtain a code (Porting Authorisation Code (PAC) in the UK and Unique Porting Code (UPC) in India) which is then given to the recipient network. The recipient continues the porting process by contacting the donor with porting code. This form of porting is known as "donor-led". A significant technical aspect of MNP is relat...

The number of bits in a processor refers to the size of the data types that it handles and the size of its register .A register is a small amount of memory available to the processor in order to speed up its operations.Thus,a 64-bit processor can address  a larger physical memory locations and hence,can handle larger amount of RAM, than a 32-bit processor. Another difference is the speed .A 64-bit processor can perform more number of calculations per second than a 32-bit processor.Windows 95, 98, and XP are 32-bit operating systems and Windows Vista, Windows 7, and Windows 8 are 64-bit. A  64-bit machine can have a 32-bit or 64-bit operating systems installed on it whereas a 32-bit machine cannot have a 64-bit operating system installed. Although it is possible for a 32-bit software to run on a 64-bit machine,a 64-bit software cannot run on a 32-bit machine. How to find out whether a computer is running a 32-bit or 64-bit version of windows? Right click My Compute...

              'A fatal exception XY has occured at xxxx:xxxxxxxx' What is it? A fatal exception error is an error that causes a program to abort,returning the user to the operating system.When program encounters an exception that is invalid or unknown,fatal exception error(fatal 0E) is thrown.It mainly occurs during the computer's booting process,shutdown process or while trying to launch a program in windows.The processor exception(XY value) ranges from  00 to 0F. xxxx:xxxxxxxx represents the 32-bit address where the actual exception has occured. 00-Divide fault 02-NMI interrupt 04-overflow trap 05-bounds check fault 07-coprocesser not available 08-double fault 09-coprocesser segment overrun 0A-invalid task state segment 0B-Not present fault 0C-stack fault 0D-general protection fault 0E-page fault 10-coprocessor error fault 11-Alignment check fault When it occurs? Attempting an illegal instruction or operation accessin...

The curiosity "What is going at home when your away?" is the main intention behind developing home security systems,which if automated makes things simpler. Angee is an autonomous home security system, which prevents someone from breking into your house! Angee knows when you come and go, so it can fully automate security, also monitoring every entrance point around the perimeter of your home.Motion sensors comes handy for complete sensing. Angee can be controlled and monitored using your smartphones. With two-step authentication-at the door identification and voice recognition, it ensures safety.  your Voice is usedas backup when  phone is dead. It comes with a rotation camera enabling 360 degree view and a 10 hour battery. It also allows communication and recording,sharing and streaming of videos. The all new Angee ensures a stress free and safe living!!

The U.S. military developed and implemented GPS satellite network as a military radio-navigation system to figure out the exact position on the earth. It’s made up of three parts: satellites, ground stations, and receivers. GPS is  a constellation of 27 Earth-orbiting satellites (24 in operation and three extras in case one fails). Each satellite is built to last about 10 years. Each one transmits information about its position and the current time at regular intervals.These satellites make two complete rotations around the globe everyday such that at any point of time atleast four satellites are visible to the receiver. The basis of GPS is "trilateration".Trilateration is a method of determining the relative positions of objects using the geometry of triangles.In order to make this simple calculation, the GPS receiver has to know the location of at least three satellites and the distance between our receiver and each of those satellites. The signals, moving at the speed...

Scan from anywhere!!Zcan wireless scanner allows you to swipe over documents and images and instantly you can see them appear on the monitor. Makes editing easier.Also ,it supports 199 OCR(Optical Character Recognition)languages.It can be instantly translated using Google  Translate.It works on Wi-Fi.Go grab a Zcan wireless scanner mouse and make a permanent store of all important and cherishable documents.

Do you want to check whether you have deployed your anti virus(AV) software correctly? Checking your AV software with real virus is risky!What if you have an option to test with a file which the AV software detects as if it were a virus,but actually it is non-viral? EICAR(European Institution for Computer Anti virus Research) provides Anti-malware test file for this purpose.It provides four test files to check your anti virus software.A good anti virus scanner will believe that the file is virus-infected. To download the anti-malware test files,visit this website Please feel free to post your comments.