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Showing posts with label Technology. Show all posts
Showing posts with label Technology. Show all posts

Thursday 24 October 2013

What is a widget?

In Android, the word widget is a generic term for a bit of self-contained code that displays a program, or a piece of a program, that is also (usually) a shortcut to a larger application. 



We see them every day on web pages, on our computer desktop and on our smartphones, but we never give too much thought into how great they are. Widgets first appeared in Android in version 1.5, and really gained traction thanks to HTC's Sense-flavored version of the operating system. Prior to the release of the HTC Hero and our first taste of Sense, widgets were functional, but pretty bland in appearance. Since then, OEMs and independent developers alike have done some marvelous things with widgets, and it's hard to imagine using Android without them. 

Android widgets come in all shapes and sizes and range from the utilitarian 1-by-1 shortcut style to full-page widgets that blow us away with the eye-candy. Both types are very useful, and it's pretty common to see a widget or two on the home screen of any Android phone. A full-page widget, like HTC's weather widget for late-model Android phones, tells you everything you need to know about the current conditions, and is also a quick gateway to the weather application where you can see things like forecasts and weather data for other cities. At the other end of the spectrum, the Google Reader 1x1 widget watches a folder in your Google Reader account and tells you how many unread items there are, and opens the full application when pressed. Both are very handy, and add a lot to the Android experience. 

Most Android phones come with a handful of built-in widgets. Some manufacturer versions of Android offer more than others, but the basics like a clock, calendar, or bookmarks widget are usually well represented. This is just the tip of the iceberg though. A quick trip into the Android Market will dazzle you with the huge catalog of third-party widgets available, with something that suits almost every taste. With Ice Cream Sandwich supporting things like higher resolution screens and re-sizable widgets, it's going to be an exciting year seeing what developers can come up with.

Wednesday 23 October 2013

Android Powered Helmet By Silicon Valley

Silicon Valley is going to introduce a new innovative gadget. The Android powered helmet that gives its rider directions, map locations and weather forecasts has been developed. 



The helmet, developed by a Silicon valley-based start-up, features a tiny heads-up display, positioned so that the image appears in front of your right cheek, where you would need to look to keep your eyes on the road. 

An integrated rearview camera with a 180 degree viewing angle gives the view behind the rider. 

The Android-powered, Bluetooth-linked motorcycle headgear can show driving directions, the weather and other basic interface elements, ’Discovery News’ reported. 

It is also able to pair with smartphones so you can use voice controls to make calls, listen to music, send texts and change your destination all hands-free. 

The company, Skull helmets, hopes to ship the headgear in the first quarter of next year. 

The helmet has also bagged one of five DEMO God awards handed out at the International Data Group (IDG)'s DEMO Fall 2013 conference in US.

Monday 21 October 2013

Ultra Fast Alternative To Wi-Fi - Li-Fi Bulb

Researchers at Fudan University in Shanghai have just become the latest to demonstrate a technology that transmits data as light instead of radio waves, which gets around the congestion issue and could be ten times faster than traditional Wi-Fi. 



In dense urban areas, the range within which Wi-Fi signals are transmitted is increasingly crowded with noise—mostly, other Wi-Fi signals. What’s more, the physics of electromagnetic waves sets an upper limit to the bandwidth of traditional Wi-Fi. The short version: you can only transmit so much data at a given frequency. The lower the frequency of the wave, the less it can transmit. 

10x faster connections than Wi-Fi, through the nearest lamp 

But what if you could transmit data using waves of much higher frequencies, and without needing a spectrum license from your country’s telecoms regulator? Light, like radio, is an electromagnetic wave, but it has about 100,000 times the frequency of a Wi-Fi signal, and nobody needs a license to make a light bulb. All you need is a way to make its brightness flicker very rapidly and accurately so it can carry a signal. 

The idea sounds daft: Who would want to sit under a flickering bulb? But Li-Fi, a standard proposed just two years ago, is seeing rapid technological progress. 

First, data are transmitted to an LED light bulb—it could be the one illuminating the room in which you’re sitting now. Then the lightbulb is flicked on and off very quickly, up to billions of times per second. That flicker is so fast that the human eye cannot perceive it. (For comparison, the average energy-saving compact fluorescent bulb already flickers between 10,000 and 40,000 times per second.) Then a receiver on a computer or mobile device—basically, a little camera that can see visible light—decodes that flickering into data. LED bulbs can be flicked on and off quickly enough to transmit data around ten times as fast the fastest Wi-Fi networks. (If they could be manipulated faster, the bandwidth would be even higher.) 

Li-Fi’s limitations are similar to next-generation Wi-Fi 

Li-Fi has one big drawback compared to Wi-Fi: you, or rather your device, need to be within sight of the bulb. It wouldn’t necessarily need to be a special bulb; in principle, overhead lights at work or at home could be wired to the internet. But it would mean that, unlike with Wi-Fi, you couldn’t go into the next room unless there were wired bulbs there too. 

However, a new generation of ultrafast Wi-Fi devices that we’re likely to start using soon face a similar limitation. They use a higher range of radio frequencies, which aren’t as crowded with other signals (at least for now), and have a higher bandwidth, but, like visible light, cannot penetrate walls. 

Engineers and a handful of startups, like Oledcomm, have been experimenting with Li-Fi technology. The Fudan University team unveiled an experimental Li-Fi network in which four PCs were all connected to the same light bulb. Other researchers are working on transmitting data via different colors of LED lights—imagine, for example, transmitting different signals through each of the the red, green and blue LEDs inside a multi-colored LED light bulb. 

Because of its limitations, Li-Fi won’t do away with other wireless networks. But it could supplement them in congested areas, and replace them in places where radio signals need to be kept to a minimum, like hospitals, or where they don’t work, such as underwater.

Sunday 20 October 2013

Interesting Facts of Technology



Interesting Facts of Technology










Saturday 5 October 2013

What Is Android (Operating System) ?

Android is a Linux-based operating system designed primarily for touchscreen mobile devices such as smartphones and tablet computers.Android is a computing platform designed for use in some smart phones and other devices. This technology, which is owned by Google, Inc., includes an operating system, software, and applications. The operating system is based on Linux®, which provides advanced computer processing. Android™ technology is maintained and continually developed by the Android Open Source Project (AOSP).


History of Android :

Android, Inc. was founded in Palo Alto, California in October 2003 by Andy Rubin (co-founder of Danger), Rich Miner (co-founder of Wildfire Communications, Inc.), Nick Sears (once VP at T-Mobile), and Chris White (headed design and interface development at WebTV).

Google purchased Android Inc., a 22-month-old Palo Alto, California, startup in July 2005.

 In 2008, Google introduced the HTC Dream™ as the first marketed phone to use Android technology. Since that time, this platform use has expanded to other smart phones, tablet computers, E-readers, netbooks, and other devices.

Android applications :

Although Android technology is increasingly being used on a range of devices, the most common hardware to use this platform is mobile phones. A large community of developers regularly write applications (apps), including games, social networking, and business modules, for Android smart phones. There are a wide range of free Android apps, including games and productivity titles, and paid apps are even more common. Android technology — which is used by thousands of developers because it is freely available for download — has given software developers the opportunity to sell their creations to a wide group of consumers.


How Android Is Different :

One of the key differences between Android technology and other smart phone systems is that it is open for modification. This gives vendors the opportunity to change and enhance their products based on their own preferences. This has created many versions of Android phones, which can vary by vendor, as well as a range of other devices that use this platform. In 2011, Google introduced a new arena for Android when it announced plans to launch Android@Home, a network that could allow users to automate and control home appliances.

Friday 4 October 2013

What Are The Differences Between Capacitive & Resistive Touchscreens?

Today we all are using smartphone or touchscreen phones so its quite important for us to know more about our smartphone how's its touch screen work.



Touchscreen is an electronic visual display that the user can control through simple or multi-touch gestures by touching the screen with one or more fingers. Some touchscreens can also detect objects such as a stylus or ordinary or specially coated gloves. The user can use the touchscreen to react to what is displayed and to control how it is displayed (for example by zooming the text size).
The touchscreen enables the user to interact directly with what is displayed, rather than using a mouse, touchpad, or any other intermediate device (other than a stylus, which is optional for most modern touchscreens).

Capacitive touch screen :

E.A. Johnson described his work on capacitive touch screens in a short article which is published in 1965.


The capacitive touch screen is made up of a glass panel that is coated with a material.
The property of this material is that it can store electrical charge. So the capacitive touchscreens basically stores electrical charge.
But for good, Human body can also store charge. So, when you touch this screen with your finger, some of these charges on the screen gets transferred to your finger. The oscillator circuits located at the corner of your system will then sense this decrease in the charge on screen and the spot the exact location where touch occurred, and then transfers this specified information to the touchscreen driver software.

Pros :

  • Multi touch support available
  • Visibility good even in sunlight
  • Highly sensitive to finger touch leading to ease of use
  • Not prone to dust particles
  • Glossy look and feel

Cons :

  • Need to have atleast 5% humidity to achieve capacitive effect
  • More expensive than Resistive touch screen
  • Doesn't work with inanimate objects/fingernails/gloved fingers
  • Latest technology, may need to evolve a bit more!

Resistive touch screen :

A resistive touch screen was developed by American inventor G. Samuel Hurst on Oct. 7, 1975.The first version was produced in 1982.

Resistive touch screen, on the other hand is again made up of normal glass panel. However, this glass panel in this case is coated with three layers.

Two of these layers being conductive and resistive are kept apart using spacers while the third scratch-resistant layer covers the whole setup

When the resistive touch screen system is running, current flows through these layers. On a finger touch, the two layers get connected and change in electrical field occurs. The system calculates the coordinates of point of contact and passes them to touch screen driver software.

Now that you understand how Capacitive touch screen and Resistive touch screens work, lets figure out Pros and Cons of each of these touch screens.

Pros:


  • Relatively cheaper
  • Can operate with any pointing devices like stylus, pen, nail etc
  • Can operate at any level of humidity
  • Ease of use, as it could be used even with your winter gloves on!
  • Very useful for people using handwriting recongition system, due to ease of use with a stylus!
  • More accurate than capacitive touch screen!
  • Old technology and hence more reliable!

Cons:

  • Multi touch support not available. Though technology did evolve after some modifications with the existing resistive touch screen circuitry, its still not 100% developed yet!
  • Highly sensitive. As it can operate with almost any sort of pointing devices, can be more vulnerable with dust particles!
  • Poor visibility in sunlight, mostly due to multiple layers reflecting light!
  • Screen, being sensitive at the upper layer, can be more vulnerable to scratches!