Telecommunications

Companies, Services, Equipment, Technology, Business

Telecommunication is the technique of transmitting a message, from one point or place to another with the typical additional attribute of being bi-directional. In practice it also recognizes that something may be lost in the process; hence the term 'telecommunication' covers all forms of distance communications, including radio, telegraphy, television, telephony, data communication and computer networking.

Physics

Physics (from Greek from φυσικός (phusikos): natural, from φύσις (fysis): Nature) is the science of Nature in the broadest sense.

Physicists study the behaviour and interactions of matter and radiation. Theories of physics are generally expressed as mathematical relations. Well-established theories are often referred to as physical laws or laws of physics; however, like all scientific theories, they are ultimately provisional.

Electrochemistry

Preview of Electrochemistry

Electricity, Conductivity, Molar conductivity, Independent migration of ions, Ion speeds and conductivity-the Einstein and Stokes-Einstein equations, Transport properties of ions, Diffusion and conductivity: the Nernst-Einstein equation, Chemical and electrochemical potential, Electrode potential: Nernst equation, Cell potential, Relation Between Free Energy and Potential of a Galvanic Cell, Silver-silver chloride reference electrode, Sign of cell potential

Spectroscopic Ellipsometry

The ellipsometry is an optical technique devoted to the analysis of surfaces. It is based on the measurement of the variation of the polarization state of the light after reflection on a plane surface.

The ellipsometry technique has been discovered one hundred years ago but it is only fifteen years ago, thanks to the development of electronic and computers that the technique expand largely in numerous fields.

PIC16C84

The PIC microcontroller, by Microchip, has become widely used in many of today's projects. Its low cost, small size, ease of use and powerful RISC instruction set make it suitable for both small projects, and complex microcontroller applications.

It has been featured in many of the articles and projects in several magazines. It is an especially exciting device to the hobbyist as it can drastically simplify most complex projects.

The PIC microcontroller that meets the needs of the casual experimenter and the beginner is the PIC16C84. The main feature of the 'C84 that lends itself to experimentation is its EEPROM memory that is electrically erasable and reprogrammable.