Sunday, 7 June 2015

Hologram

It was my laser lab and we had to form a hologram. Let me tell you more about this puzzle image...
A hologram is a photographic recording of a light field, rather than of an image formed by a lens, and it is used to display a fully three-dimensional image of the holographed subject, which is seen without the aid of special glasses or other intermediate optics.
In its pure form, holography requires the use of laser light for illuminating the subject and for viewing the finished hologram. In a side-by-side comparison under optimal conditions, a holographic image is visually indistinguishable from the actual subject, if the hologram and the subject are lit just as they were at the time of recording. A microscopic level of detail throughout the recorded volume of space can be reproduced. In common practice, however, major image quality compromises are made to eliminate the need for laser illumination when viewing the hologram, and sometimes, to the extent possible, also when making it. Holographic portraiture often resorts to a non-holographic intermediate imaging procedure, to avoid the hazardous high-powered pulsed lasers otherwise needed to optically "freeze" living subjects as perfectly as the extremely motion-intolerant holographic recording process requires. Holograms can now also be entirely computer-generated and show objects or scenes that never existed. A more flexible arrangement for recording a hologram requires the laser beam to be aimed through a series of elements that change it in different ways. The first element is a beam splitter that divides the beam into two identical beams, each aimed in different directions:
One beam (known as the illumination or object beam) is spread using lenses and directed onto the scene using mirrors. Some of the light scattered (reflected) from the scene then falls onto the recording medium.
The second beam (known as the reference beam) is also spread through the use of lenses, but is directed so that it doesn't come in contact with the scene, and instead travels directly onto the recording medium.
When the two laser beams reach the recording medium, their light waves intersect and interfere with each other. It is this interference pattern that is imprinted on the recording medium. The pattern itself is seemingly random, as it represents the way in which the scene's light interfered with the original light source — but not the original light source itself. The interference pattern can be considered an encoded version of the scene, requiring a particular key — the original light source — in order to view its contents. This missing key is provided later by shining a laser, identical to the one used to record the hologram, onto the developed film. When this beam illuminates the hologram, it is diffracted by the hologram's surface pattern. This produces a light field identical to the one originally produced by the scene and scattered onto the hologram.
Hologram can be set upon certificate of authenticity, degree certificate, ISI mark, on currency notes...hologram is truly "holy-gram"...

Monday, 18 May 2015

Softwares


I have come up with a DVD of 100 softwares. Let me tell you more in details...
Computer software can be put into categories based on common function, type, or field of use. There are three broad classifications:
Application software is the general designation of computer programs for performing tasks. Application software may be general purpose (word processing, web browsers, ...) or have a specific purpose (accounting, truck scheduling, ...). Application software contrast with system software.
System software is a generic term referring to the computer programs used to start and run computer systems including diverse application software and networks.
Computer programming tools, such as compilers and linkers, are used to translate and combine computer program source code and libraries into executable RAMs (programs that will belong to one of the three said categories)
The different types of software are:
  • Text formatting/presentation software 
  • Data in database software 
  • Financial analysis software 
  • Programing languages software 
  • Painting/3D modelling/animation/computer aided design software 
  • simulation software 
  • video editing software 
  • music editing software 
  • photo editing software 
  • gaming software 
  • emailing/messaging/mobile telephony software 
  • e signature software 
  • communication software 
  • educational software 
  • entertainment software 
  • religious software 
  • management software
...I hope you like the DVD that I have come up with...

Wednesday, 6 May 2015

Media


I was listening to my favorite songs on my mobile the other day, when I gave a thought to how this was possible...
MP3 players use solid-state memory. An MP3 player is no more than a data-storage device with an embedded software application that allows users to transfer MP3 files to the player. MP3 players also include utilities for copying music from the radio, CDs, radio or Web sites and the ability to organize and create custom lists of songs in the order you want to hear them. This list of songs is called a playlist. In addition to storing music, the MP3 player must play music and allow the user to hear the songs played. To do this, the player:
  •  Pulls the song from its memory. 
  •  Decompresses the MP3 encoding, through DPS, via an algorithm or formula.
  •  Runs the decompressed bytes through a digital-to-analog converter into sound waves. 
  • Amplifies the analog signal, allowing the song to be heard.
For both video and audio files, making the files even smaller requires codec, or compression/decompression software. Codecs discard unnecessary data, lower the overall resolution and take other steps to make the file smaller. Different codecs also create specific types of files, which work on specific streaming players.
The total reduction in quality depends on a number of factors, including the bitrate, or the speed of the transfer from the server to a computer.
Once a file is edited, compressed and encoded, it's uploaded to a server.
A video player does this:
You record a high-quality video or audio file using film or a digital recorder. You digitize this data by importing it to your computer and, if necessary, converting it with editing software. If you're creating a streaming video, you make the image size smaller and reduce the frame rate. A codec on your computer compresses the file and encodes it to the right format. You upload the file to a server The server streams the file to users' computers
...Now you can listen to audio file on your mobile, or watch a video file on your laptop even on the move... Indeed entertainment helps in relaxing mind in this busy world... Audio Visual effects are magic of technology...

Wednesday, 18 December 2013

Netsurfing

I can spend hours netsurfing!!! Let me tell you more about this hobby...
Through online shopping one can buy anything from pizza to car at a click.
When it comes to playing online games with friends on the net, time
just flies by. One could even play lotto to make a fortune.
One can download all sorts of soft wares from an emoticon
to a server and not to forget get it scanned online for virus. If one likes
reading then one can browse newsletters, online newspaper, magazine etc.
One can watch videos and even stream in television on the net. Nothing
like making long distant calls on net phone and telephone conferencing
via a web cam. Chatting on the net has come a long way One can always
listen to latest music on headset.One can check email on the move with a
Wi-Fi palmtop. One can view personal data on homepages and be well connected.
One can search for online jobs and your dream job could be just a click away...
One can post ads from flowers to real estate for more customers. The search engine
is indeed a wonder and one gets access to a great database of knowledge.
One can post any query in the world and get it answered. One can freely
express oneself by blogging on the net. One can book travel tickets and
manage hotel reservations online. One can participate in online trading and
make money! else indulge in bidding on online auction !...the choice is yours...
One can avail the hosting services else buy space on the server.
One could do with some laughs over net humor and animations. I bet
you would want to upload photos, videos and other files on the net...
...The net is like space and netsurfing is like exploring the space...the
more you explore...the more remains to be explored...