Showing posts with label technology. Show all posts
Showing posts with label technology. Show all posts

Saturday, November 28, 2015

Periscope: A scope for amateur journalists

Every human being has this basic instinct to share information with his or her peers and sometimes with the entire globe. In earlier times, news was primarily spread by the word of mouth, then came the idea of using human messengers, sending letters or scrolls via trained birds or other pets, which then evolved into the concept of printing newspapers and finally all of this led to the creation of the most popular and preferred form of journalism, called Broadcast journalism.

Broadcast journalism, as defined by Wikipedia is the field of news and journals which are “broadcast”, that is, published by electrical methods, instead of the older methods, such as printed newspapers and posters. Broadcast methods include radio (via air, cable, and Internet), television (via air, cable, and Internet), and, especially recently, the World Wide Web. Such media disperse pictures (static and moving), visual text and/or sounds. Today there are several thousand news channels in all the developed and developing nations like the USA, UK, EU nation’s, Russia, China, India, Australia and Japan.

In the past two three years or so, the concept of professional and especially amateur online journalism has evolved a lot. Thanks to the internet, the common man has all the necessary platform to start his/her own website or blog or YouTube channel to showcase his/her talents. Now, speaking of online journalism, about a year ago twitter decided why not build a free platform to enable everyone with a smartphone to live stream their surroundings through their own perspective. And voila Periscope was born with an apt tag line:

"Explore the world with someone else’s eye"

It has a similar relationship with twitter like what Google+ has with Google, to the extent that all twitter accounts have a periscope account that is waiting to be enabled by its holder/owner. Now looking at the periscope app, it has a very decent UI (user interface) and is loaded with umpty number of features. One can stream live videos of their surroundings, search for streaming’s of other users, like or comment on the video of other users and also follow other users whom’s content catches their eye. I downloaded the app about a month ago and this is what was waiting for me:









I personally think that this app is pretty great with a very neat UI and my overall experience on this app was pretty satisfactory. It allows me to live stream the interesting things and events that happen around me. The only problem is that; for streaming videos, a pretty strong internet connection is needed and if you are in a country like India where there is no fast public WiFi or no public WiFi at all, this could pose as a major setback. But looking on the bright side, all of us can stream the cool things that surround us on several occasions and also view the cool things that surround many others around the globe, at the comfort of our couch or office chair or a park bench.

Wednesday, November 25, 2015

Lifi: Internet using light

Imagine using your car headlights to transmit data or surfing the web safely on a plane, tethered only by a line of sight. Yes. You read it correctly, Professor Harald Hass has developed a new prototype that uses just three components to justify his claim: a LED light, a solar panel and a display device/screen.

To further cement your trust into this article, here is a small intro about the man under the spotlight: Professor Haas received the PhD degree from the University of Edinburgh in 2001. He currently holds the Chair of Mobile Communications at the University of Edinburgh, and is co-founder and Chief Scientific Officer of pureLiFi Ltd as well as the Director of the LiFi Research and Development Center at the University of Edinburgh. His main research interests are in optical wireless communications, hybrid optical wireless and RF communications, spatial modulation, and interference coordination in wireless networks.
Now back to his device, a solar cell is a device that converts incident light into electricity. When the incident intensity or brightness of the light is varied, the output current also varies accordingly. Hass has devised his prototype using the same principle. The intensity of the light is varied very rapidly, almost unnoticeable to the human eye and that signal is converted into the video that is to displayed by the screen or a laptop or any computer device. The data transfer rate of this device is believed to be fifty megabytes per second, which much higher than the data transfer rates that is currently provided by our broadband connections.
Hass initially used specially fabricated photo-detectors to enable this process, later he switched to solar cells to utilize the current infrastructure to its utmost potential. The device is completely eco-friendly and can be manufactured with no further increase in energy consumption than the present levels. Hass and his team believe that they can positively launch this project in a global scale in the next two to three years.
Hass first presented his device at a TED event, its link is provided below:
Posted by Apru

Sunday, May 12, 2013

QR Codes

What is a QR code? 

       A QR code, technically known as a quick response code is similar to a matrix type code or a simple replacement for the bar code. Nowadays, we can see QR codes being used in various places such as in newspaper ads, online ads, train tickets and also in many super-markets instead of the standard bar codes.

       A QR code can be scanned using QR scanners or even by using QR code scanner apps, which can be downloaded for free. These apps first take a picture and then use a certain set of algorithm to scan these codes.. There are almost 40 types of QR codes. For encoding or decoding a QR code we have to concentrate on five main parts of a QR code. You might also be interested to know that there are  certain websites that generate QR codes for the text that you type.

GENERAL QR CODES



       QR codes are the future of codes that can be used to simplify the task of writing articles in newspapers, posting ads, displaying product related information, scanning train tickets, flight tickets, metro rail tickets, etc.



For further information click on the links given below:
QR Codes
 QR code generators