Info Tech

To disperse crowds and prevent rioting, various forms of non-lethal weapons (NLW) are used. Among these, interestingly, is sound. Known as an acoustic or sonic weapon, infrasound (superlow frequency) and ultrasound (super-high frequency) greatly affect human ears. They can disorientate a target and have psychological effects as well as physical effects of nausea and damage to blood vessels. Explanation Ultrasound can be increased to 120 decibels (the same volume as a jumbo jet taking off), which is considered the human pain threshold. In contrast, infrasound feels like a damaging vibration or pressure wave, as it’s at a frequency too low for humans to hear. When exposed to high levels of sound, the influx of energy has a painful effect on the body. As well as huge decibels of volume, the variations in frequency can also cause damage. For instance, an infrasound of seven or eight Hertz can rupture blood vessels. Certain types of sound within the frequencies we are able to he...

Thomson discovered the electron using this concept in 1897 after conducting experiments with cathode rays and studying their uses. Electron guns are a very versatile electrical component. They are essential to a number of devices, from 3D printers and welders to the large synchrotron at the Diamond Light Source in the UK and the electric systems of Kimball Physics in the US So how they work It’s all down to kinetic energy and electrical currents. When installed in an electrical device’s vacuum tube, the gun turns electrons and ions into usable beams of energy by releasing them from their  metal source (cathode). This process is known as thermionic emission. Inside the gun there is a small filament that heats the cathode, which makes it release a stream of electrons. The electrons accelerate rapidly and the resulting beam is pulled toward the neighbouring anode, which is positively charged. There are small holes in the anode which allow some electrons to pass through, so a...

Solar powered rubbish bins look like ordinary dustbins but these are powered by light(sun), so the question is what is power is used for ? Actually these dustbins has an trash compaction system which is powered by light or solar system and some other intelligent features explained bellow  Features  They crash litter  Send notification (usually email) when full  Make collection process efficient  Totally powered by sun   How it work You can see the parts of the solar bin in the picture.These bins contain a sensor to detect when it is full , when the litter reaches to a specific thresh hold it start the compaction process, it use a 12 volts battery which is charged by sunlight. Normally these bins have capacity of 800 litres (180 gallons) , due to its low power consumption it can be even used in shaded places  It use a wireless transmission system which is connected to the sensor and it send a signal to the local waste collecto...

Down is the list of websites which are very interesting by their concept of presentation , most of them are designed by the help of social media website but their concept is somehow other-way around  Just visit them and comment bellow if you like ...............Click on headings to visit 1   Billion Facebook Profile Pics on a Page     Billions of facebook profile pictures are grouped together on a single page preview you just scroll       down and have fun and you can click on image to see the person's facebook profile 2  Crazy Card Trick        This website shows you the playing cards you need to select of your choice and they will show you    a magic   3 Twitter Clock    This is a unique twitter clock which shows you time taken by the tweets of the users , have a look         and you will understand  4  Stranger MeetUp    Just click on chat butt...

A 3Doodler allow anybody to write directly into the air by heating some plastic materials like PLA and ABS  The world’s first 3D-printing pen – WobbleWorks’s 3Doodler – was launched in 2013,  This  enables you to turn drawings into full-3D models on any surface, without the need of any other  software or computer. Unlike a normal pen, however, the 3Doodler doesn’t use ink, instead relying on filaments of ABS(Acrylonitrile Butadiene Styrene)  or PLA(polylactic acid)  plastic, materials  also used by most desktop 3D printers. How it works  The 3Doodler prints by heating three-millimetre (0.1-inch)-thin strands of plastic, which need to be loaded into its back. After turning the 3Doodler on and waiting a few minutes for it to warm up, the LED indicator light will then turn blue, which means that the heated plastic can then extrude from the 3Doodler nozzle’s metal tip – the only potentially dangerous part, which can get as hot as...

If you have a picture downloaded from facebook and you want to check the uploader or source of the picture from where the picture was downloaded , then follow the steps  select any picture from your computer "usually from you downloads folder" which is downloaded by facebook You can make guess that if a picture is downloaded from facebook or not by looking at its name like "112334_33345884_33384754774.jpg"  if the name is like the give pattern then the picture is from facebook so next you just have to copy the number between two underscores like "112334_ 33345884 _33384754774.jpg"  and add this number to the facebook url like ->  www.facebook.com/33345884  and press enter ..........and you are done  one thing keep in mind you can check only for the pictures which are downloaded from Public source you can also see the demo by screen shots   step 1 step 2  step 3  add the number t...

In a situation where you find that you windows media player is crashed so do not worry, you can Play your content using  Google Chrome  . It is very Simple just open your Google Chrome or new tap if already opened . Drag your audio/video file into the browser  Or you can open it by (Ctrl+O) and select the actual file and it will be played  You Can bookmark this and play your stuff when ever you want  see the demo 1 2 Please revisit for more updates