Carbon Nanotubes
Carbon nanotubes, long thin cylinders of carbon, were discovered in 1991 by Iijima. Carbon nanotubes (CNTs) are allotropes of carbon which are members of the fullerene structural family, which also includes the spherical buckyballs.
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Carbon nanotubes, long thin cylinders of carbon, were discovered in 1991 by Iijima. Carbon nanotubes (CNTs) are allotropes of carbon which are members of the fullerene structural family, which also includes the spherical buckyballs.
The term “rapid prototyping(RP)” refers to a class of technologies that can automatically construct physical models from Computer-Aided Design (CAD) data. It is also called “Desktop Manufacturing or Freeform Fabrication”.
Human Computer Interaction (HCI) as the name suggests, is related to humans and computers and the way, both interact with each other.Because human-computer interaction studies a human and a machine in conjunction, it draws from supporting knowledge on both the machine and the human side. On the machine side, techniques in computer graphics, operating systems, programming languages, and development environments are relevant. On the human side, communication theory, graphic and industrial design disciplines, linguistics, social sciences, cognitive psychology, and human factors are relevant. Attention to human-machine interaction is important, because poorly designed human- machine interfaces can lead to many unexpected problems.In particular, core vision techniques (body, gesture, gaze) and affective interaction (facial expression recognition, and emotion in audio) which are needed for Multimodal Human Computer Interaction (MMHCI) research.
Mobile Ad hoc networks are a new paradigm of wireless network, offering unrestricted mobility without any underlying infrastructure such as base station or mobile switching centers. Basically ad hoc network is a collection of nodes communicating with each other by forming a multi-hop network.
Micropayment system provides a means of transferring small monetary amounts and serve as a convenient alternative to traditional payment arrangements. Micropayments refer to low value electronic transactions. They provide an alternative revenue source for content providers beyond advertising and subscriptions (W3C).
The sinusoidal pulse width modulation (SPWM) is one of the most popular modulation technique used in wide range of industrial application where power switching converter are employed. Low ratio of carrier frequency (fc) to modulation frequency (fm) is the best from of modulation for high power application.