Electronics

The History of Scanning Electron Microscopes The development of SEMs started with more of a whimper than a bang. When the technology was first unveiled in 1935, a group of marketing professionals was asked to evaluate the new instrument's potential in the marketplace. After polling the scientific community, the marketing experts weren't too optimistic. They estimated a need for, at most, 10 of the devices worldwide. As it turns out, the experts largely under-rated the market potential of SEMs, and gracefully, their dull appearance did not prevent further advancement in the technology.More than 50,000 SEMs occupy laboratories and businesses around the world .How did SEMs come out from near obsolescence to becoming the most sort after research tool of today. For most part,researchers have greatly improved optical microscopes to their limits.Optical  microscopes  had been used continuously for centuries, and you can sight them in classrooms across the globe,their reliance

The  Internet  has its means of luring us believe in a fake sense of anonymity. How can somebody reveal your actual identity in a virtualized world? The fact is that just simply hooking up to the Internet, you unknowingly spread information about your pc,geographical location and all the sites regularly you visit. The aim of anonymous Web browsing is to bypass the technologies that trace your activities online and may reveal your private details to others. By browsing anonymously, nobody can identify you, where you're connected from or the web sites you visited. When people talk about browsing the Web anonymously, they actually relate it with extramarital affairs, malicious hacking, illegal downloading and other negative behaviors. That's not always the case. In essence, there are numerous legitimate reasons for someone  to be anonymous online,which may be one of the following: Your employer or school has strict Web surfing rules and screens your access to the inter

Digital fingerprinting is a computer-powered analysis tool used to identify a pieces of media like a song or video clip.Let's dive into,how this fingerprint analogy can into being. Everybody has a unique fingerprint pattern,so every piece of media has its own unique features which can be identified by intelligent software. What is the benefit of this type of identification.  Sites like  YouTube  are able to scan files and match their fingerprints against a database of copyrighted material and prevent users from uploading copyrighted files. Sounds easy,yes?People usually mix digital fingerprinting with watermarking or don't understand what the technology is all about. The problem is the word "digital fingerprinting" can be linked to two totally unrelated things.The first meaning is already stated above,while the second arises from traditional fingerprint analogy,comparing your personal computer to an online fingerprint that can be used to track your online ac

In this digital world,the word "drone" has taken on negative meaning. Mass media see drones as inhuman machines quietly sneaking through the skies in  pursuit of unknown human suspects.The general public view reconnaissance drones as reminders that someone is watching everything you do. Drones are powerful weapons and  spy tools . But they are also do much more. Even though "drone" is the most commonly used term, these flying machines are also known as  UAVs  ( unmanned aerial vehicles ). Government and military agencies were the first to use drones for warfare, these winged machines are now sold to kids,Remote controlled plane hobbyists, photographers, videographers, farmers and anyone that can gain from a view from the skies around them. Military-grade drones can enter a backpack, or can be as massive as a full-size aeroplane and loaded with death-dealing payloads.These drones can cost several millions of dollars and with wingspans of more than 100 feet (30