TEESA-Tech Blog

  NANOTECHNOLOGY Nanotechnology  (or " nanotech ") is the use of matter on an  atomic ,  molecular , and  supramolecular  scale for industrial purposes. The earliest, widespread description of nanotechnology referred to the particular technological goal of precisely manipulating atoms and molecules for fabrication of macroscale products, also now referred to as  molecular nanotechnology . A more generalized description of nanotechnology was subsequently established by the  National Nanotechnology Initiative , which defined nanotechnology as the manipulation of matter with at least one dimension sized from  1  to  100   nano meters . This definition reflects the fact that  quantum mechanical  effects are important at this  quantum-realm  scale, and so the definition shifted from a particular technological goal to a research category inclusive of all types of research and technologies that deal with the s...

  3D printing 3D printing , or  additive manufacturing , is the construction of a three-dimensional object from a  CAD  model or a digital  3D model . The term "3D printing" can refer to a variety of processes in which material is deposited, joined or solidified under  computer control  to create a  three-dimensional  object, with material being added together (such as liquid molecules or powder grains being fused together), typically layer by layer. The  umbrella term   additive manufacturing (AM)  gained popularity in the 2000s, [5]  inspired by the theme of material being added together ( in any of various ways ). In contrast, the term  subtractive manufacturing  appeared as a  retronym  for the large family of  machining  processes with material  removal  as their common process. The term  3D printing  still referred only to the polymer technologies in most mi...

Cognitive Radio: An Emerging Intelligent Radio Technology in the Wireless Communication   Cognitive radio (CR) is a form of wireless communication in which a transceiver can intelligently detect which communication channels are in use and which are not, and instantly move into vacant channels while avoiding occupied ones. Characteristics of Cognitive Radio cognitive Radio have main characteristics    Cognitive capability   Reconfigurable Capability   self-organized capability Security Issues: The question is how to protect the licensed spectrum and users and also how to avoid unlicensed users from causing interference with existing licensed users or use of special reserved frequencies like, e.g., for emergency services. Other possible security risks are involuntary downloading of malicious software, licensed user emulation Advantages of cognitive radio Cognitive radio helps: 1. Overcome radio  spectrum scarcity How?  ...

Cyber security is the protection of internet-connected systems such as hardware, software and data from cyber-threats. The practice is used by individuals and enterprises to protect against unauthorized access to data centres and other computerized systems.  Cyber security or information technology security are the techniques of protecting computers, networks, programs and data from unauthorized access or attacks. cyber security is the protection of computer systems and networks from the theft of or damage to their hardware, software, or electronic data, as well as from the disruption or misdirection of the services they provide. Cyber security is the practice of defending computers, servers, mobile devices, electronic systems, networks, and data from malicious attacks. It's also known as information technology security or electronic information security. The term applies in a variety of contexts, from business to mobile co...

The next generation of wearables will be a privacy minefield What happens when we let companies track our emotions? Facebook recently gave us our best glimpse yet into its augmented reality plans. The company will be piloting a new set of glasses that will lay the groundwork for an eventual consumer-ready product. The “research project,” called Project Aria, is still in very early stages, according to Facebook. There’s no display, but the glasses are equipped with an array of sensors and microphones that record video, audio and even its wearer’s eye movements — all with the goal of helping scientists at Facebook’s Reality Labs “figure out how AR can work in practice.” Though the project is in its infancy, Facebook is clearly enthusiastic about its potential. “Imagine calling a friend and chatting with their lifelike avatar across the table,” the company writes. “Imagine a digital assistant smart enough to detect road hazards, offer up stats during a business meeting, or e...