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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