Thursday, January 8, 2015

How Nuclear Power Plants Work / Nuclear Energy (Animation)

A nuclear power plant is a thermal power station in which the heat source is a nuclear reactor. As is typical in all conventional thermal power stations the heat is used to generate steam which drives a steam turbine connected to a generator which produces electricity.

This animation explains nuclear power plants in detail and how they work.

1) Important buildings (e.g. cooling tower, containment building)
2) Structure of the reactor vessel (pressurized water reactor)
3) Fuel assemblies, fuel rods and fuel pellets
4) Heat production through nuclear fission
5) Heat exchanger (steam generator)
6) Steam turbines
7) Production of electricity through the generator
8) Condenser
9) Primary and secondary circuits

Blogger Tricks

Saturday, November 15, 2014

Disable WhatsApp blue ticks

Recently Whatsapp had added the “Read Receipts” feature in the form of two blue ticks, letting users know if their message or picture had been seen by their chatting partner.Previously, a single tick would mean that the message is sent and a double tick meant that the message has been received on the phone. But, there wasn't any confirmation whether the message had been seen by the recipient and when. Now there is no escaping as the sender will know if the partner saw the message and when.
While blue ticks could be great for some but also stirred up quite the panic among other users. This could take an adverse effect on WhatsApp users and force them to migrate to other chat applications.

So,how to get rid of these whatsapp blue ticks ??

All you have to do is go the Whatsapp site to download the updated version 2.11.44 (only available on WhatsApp’s site for now) which has a new option under privacy settings.

Thursday, November 13, 2014

World Energy Outlook 2014

World Energy Outlook 2014 by Dr. Fatih Birol, Chief Economist of the the International Energy Agency (IEA)

Thursday, October 23, 2014

PhotoMath: App that solves equations by using your mobile phone camera

PhotoMath reads and solves mathematical expressions by using the camera of your mobile device in real time. It makes math easy and simple by educating users how to solve math problems.

PhotoMath may sound like it is simply helping kids cheat, but the app also provides a step-by-step guide showing how each of the problems are solved. The step-by-step guide is beneficial to students that do not have access to a tutor and struggle with solving math problems. Parents can also use the PhotoMath app to jog their memory when teaching math to their kids.

PhotoMath currently supports basic arithmetics, fractions, decimal numbers, linear equations and several functions like logarithms.The PhotoMath app uses optical character recognition (OCR) technology to read the equation and calculates the answers within seconds. There is a red frame in the PhotoMath app that you have to use to capture the equation.

Here is a video demo of how PhotoMath works:

The app is available for Windows Phone and iOS only.
For Android it will be available from early 2015. Subscribe to their mailing list to get notified.

Saturday, October 18, 2014

Electronic Paper (e-paper) PPT

Electronic paper, e-paper and electronic ink are display technologies that mimic the appearance of ordinary ink on paper. Unlike conventional backlit flat panel displays that emit light, electronic paper displays reflect light like paper. This may make them more comfortable to read, and provide a wider viewing angle than most light-emitting displays. The contrast ratio in electronic displays available as of 2008 approaches newspaper, and newly developed displays are slightly better. An ideal e-paper display can be read in direct sunlight without the image appearing to fade.
Many electronic paper technologies hold static text and images indefinitely without electricity. Flexible electronic paper uses plastic substrates and plastic electronics for the display backplane. There is ongoing competition among manufacturers to provide full-color ability.
Applications of electronic visual displays include electronic pricing labels in retail shops, and digital signage, time tables at bus stations, electronic billboards, mobile phone displays, and e-readers able to display digital versions of books and e-paper magazines.

e-Paper Technologies 

  • Gyricon
  • Electrophoretic display
  • Electrowetting
  • Electrofluidic display
  • Interferometric modulator (Mirasol)

e-Paper Advantages and Disadvantages 

Advantages of e-paper

  • Paper-like Readability
  • They  are persistent without power, drawing current only when they change, which means low power consumption therefore  batteries can be smaller and last longer.
  • An electronic ink display module is thinner, lighter weight, and more robust than conventional LCD's.
  • Electronic Paper is highly flexible and it is able to be twisted or bended into different curvatures. The Electronic Paper can be applied to different shapes of products, without being limited to being bonded to flat display panels.
  • They are completely reflective requiring no backlight.
  • They are inherently bi-stable for extended periods of time.

Disadvantages of e-paper

  • Very low switching speed
  • Electrochemical complexity 
  • Electronic paper technologies have a very low refresh rate compared to other low-power display technologies, such as LCD.
  • A shadow of an image may be visible after refreshing parts of the screen. Such shadows are termed "ghost images", and the effect is termed "ghosting“.


Thursday, October 16, 2014

Artificial Photosynthesis PPT

Artificial photosynthesis is a chemical process that replicates the natural process of photosynthesis, a process that converts sunlight, water, and carbon dioxide into carbohydrates and oxygen. The term is commonly used to refer to any scheme for capturing and storing the energy from sunlight in the chemical bonds of a fuel (a solar fuel). Photocatalytic water splitting converts water into Hydrogen Ions and oxygen, and is a main research area in artificial photosynthesis. Light-driven carbon dioxide reduction is another studied process, replicating natural carbon fixation.

Click here to Download PPT 

Thursday, October 9, 2014

Biosensors PPT

Definition of Sensor

“... device, that responds to a physical (or chemical) stimulus (heat, light, sound, pressure, motion, magnetism...) and transmits a resulting impulse (as for measurement or operating a control).”
                                                                                                   Webster’s Collegiate Dictionary

Biochemical Sensor

“... A device incorporating a biochemical sensing element either intimately connected to or integrated within a transducer”.
Also, A Self-contained integrated device that is capable of providing specific qualitative or semi-quantitative analytical information using a biological recognition element which is in direct-spatial contact with a transduction element. (IUPAC,1998)
                                                     1)Biosensor ≠ Bioanalytical System

2)An Enzyme Electrode is a Biosensor

Current Definition

A sensor that integrates a biological element with a physiochemical transducer to produce an electronic signal proportional to a single analyte which is then conveyed to a detector.

Applications of Biosensors

Advantages of Biosensors

  • Highly Specific.
  • Independent of Factors like stirring, pH, etc.
  • Linear response, Tiny & Biocompatible.
  • Easy to Use, Durable.
  • Require only Small Sample Volume.
  • Rapid, Accurate, Stable & Sterilizable.