Archive for the ‘Science & Progress’ Category

The History of Semiconductor Systems

Wednesday, June 25th, 2008

There is a divided class of matters which is named quasi-conductors. Scientists got known about these materials in the end of the 19th century, but just in the 20th century scientists managed to obtain more knowledge about them. The first successful experiment was carried out by the Russian scientists in 1923. They proved that semiconductors may be used to generate fluctuations. There was no possibility to create some unique devices as igbt modules. The most considerable event in the history of semiconductor devices was the invention of the first transistor by Bell corporation in 1949. Since then a lot of persons all over the world become interested in such kind of substance as semiconductors.

The interest to optical features of semiconductors revived because of discovery of induced emission in semiconductors. It led to the creation of semiconductor laser device based on usage of p - n barriers and then on heterojunction.

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Groupware Software

Sunday, June 22nd, 2008

What is groupware application?

Groupware is computer net software intended to boost up the efficiency and facilitate communication of labour crews. Given technology is usually based on shared ambient interface and utilized for computer assisted cooperative work. It supports crews of co-woerkers involved in a shared activity or undertaking and allows users to interact, concur, co-ordinate, resolve questions, etc. Groupware has to weigh probable part men play in mutual work, how people conduct in crews and how aspects of netting program touch a user's experience.

Groupwork Software benefits.

Groupware Product is implemented for a variety of arguments, however, the dominant reason is collaboration within the team of employees.

- Groupware Software permits entities and working teams to share news better

- Groupware allows to order crew activities and solve questions jointly

- Group Collaboration Software enables the colleagues to understand the targets of enterprise work

Also certain groupware softwares are utilized to bypass the typical difficulty of managing staff in distant places. By logging in to a net or intranet server, workers don't have to be in the working place in order to access specific groupware software and benefit from collaboration.

Groupware types

Groupware Application is divided into two categories related to time:

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Some Information about Global Positioning System of the XXI century

Friday, June 20th, 2008

Today NAVSTAR GPS (Global Positioning System) is a well known reality that has already become a norm of life for a great number of people. This system gives a possibility to identify the location and velocity of the objects at any area on Earth, including polar areas, almost in all weather conditions, and in space to 100 kilometers above Earth. The United States Department of Defense has worked out and accomplished Global Positioning System.

The location is identified by the principle of measuring the distance from the point with the fixed coordinates to an object. The distance is defined by the counting the delay time of radio signal spreading from the satellite-transmitter to a GPS antenna which is a receiver. It signifies that to define 3-dimensional coordinates GPS receiver must know the distance to 3 transmitters and the time of the GPS system. And when we want to detect coordinates and altitude of GPS receiver we are to apply minimum 4 signals from 4 satellites. The direction of the transmitters from Earth is realized in the control station that is situated in Schriever base, Colorado.

Today GPS receivers are often applied for civil purposes, mostly for position and velocity detection. GPS devices are being traded in different stores and they are built in mobile phones, PCs and onboarders. GPS receiver allows a consumer to define geographical coordinates of the receiver's location at the present moment of time. The exactness of the location definition is from 3 to 5 meters and when radio signal is improved from Earth it becomes better and may be to one millimeter.

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Collaborative software

Monday, May 12th, 2008

Working together

When people deal with each other, they use three key approaches: conversing, transacting and collaborating (teamworking).

If you care to make the optimal choice about your software application, you have to get to know the differences that exist between these interactions.

An interaction of conversation is a transfer of data and an interaction of transaction is an exchange of a transaction entity between two or more people involeved, whereas an interaction of collaboration is employed for a change of a collaboration entity, for example: achievement of a common goal.

Interactions of collaboration are organized in such a way that the key purpose of the participants is to change the collaboration entity from what has been unstable and intangible, for instance, an idea, into something useful, for example a design solution.

Collaboration software tool

Teamwork Software is one of groupware applications that allow for seamless teamwork between your team members, department people, everybody who works on the project, panels, etc.

The power of these tools lies in the ability to allow team members to manage action plans, exchange documents, be updated on projects, monitor schedules, facilitate business processes, be promptly reminded of any new objectives and things they are involved in. You may come across a plenty of ways in which this software can be very useful: managing activities, documents and projects, optimizing business processes and harmonizing work of two or more departments or even firms.

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Vital News About Telephone Corporations

Friday, April 25th, 2008

Unfair rivalry on the telecommunication services market

Are you assured that there are sixty seconds in a minute? But according to IDT many telephone card companies only give customers 36 seconds in a minute. A lot of well-known corporations declared that there can't be any fair rivalry if one of competitors has unfair benefit before the beginning of a competition. As some corporations-providers of prepaid phone cards resorted to the unjust competition procedures, IDT/UTA (Union Telecard Alliance) made a resolve to defend their rights using the legal ways.

IDT/UTA had alleged that different its proper phone cards, those of many of their rivals supply only about 60 percent of the minutes of telecommunications services proposed and promoted on voice prompts heard by clients in connection with calls performed by using the defendants' cards and advertised by such rivals on radio, magazines, placard, global network, or another medium. Last year Total Call International and IDT/UTA was accused of unlawful actions by the group of phone corporations that comprised IDT Telecom Inc. and LLC. This brings to four the number of defendant groups that have settled the litigation initiated by IDT/UTA before, this year. Epana Networks, Inc., Dollar Phone Corp. and connected structures, and Locus Telecommunications, Inc are also involved into the trial. That pending suit is still on approval in the federal tribunal in Newark, New Jersey. Recently, one of softswitch providers made known his advanced terms of paying the telephone facilities. One of the characteristics he was proud of was the ability to determine the length of the minute to as long as you want. Another feature was to randomly keep back a minute from the balance. (more…)

Flash menus for your website made by you

Thursday, April 24th, 2008

If you want to make the successful website you should add some attractive components there. Another quite important feature is the pages of your website should be loaded fast. I thought that flash menu could resolve the problem. The flash menu can resolve even 2 problems: to make the website more pleasant and to make the navigation system more comprehensive. A flash menu must not be very big in terms of kilobytes.

Some people think that flash menu is quite difficult thing to create. I didn't have much knowledge and skills and flash was simply a hobby for me. Employing a specialist was out of the question too, as it would have been beyond my budget. I always say that there is no reason to set up some extra programs. (more…)

The amazing program which helps you to organize your life

Friday, April 18th, 2008

Those trying to organize their time better commonly start with setting objectives. That is quite important to realize precisely where do you go and what you need to reach doing or arranging any work.

Simple printable to do list can not help you to create the strategic projects, but it may assist a lot with sharing your time between little objectives.

Have you ever attempted to utilize just paper notes and a pencil to arrange your time and working processes completely? You should know that it is impossible.

You don't actually have to hold all your plans and goals in your head and think about it every second. Cabinets of folders were commonly utilized to satisfy such demands of people before the epoch of technologies. You may arrange the folders by the title, significance, urgency of papers that are comprised into them, but it is really not a simple task. There are newest methods of arranging your papers much more comfortably.

You can expend less time on performing such actions if you use some technical devices. Give up using the voluminous folder cabinets, you may really do without them. (more…)

The areas of modern chemistry

Thursday, April 17th, 2008

Chemistry is a very old science which studies various kinds of matters. The springs of modern chemistry have come from the old times. It used to be called alchemy - there were the attempts to turn iron into gold. Modern chemistry primarily works with molecules, combinations, reactions which occur between substances, and changes of energy that occur during these processes. The other purpose of this newest science is to find the laws which may describe the processes and phenomena in chemical reactions. It may assist to generate the required substances artificially. To perform the chemical researches, that is essential to be good in physics and biology.

Inorganic chemistry, organic chemistry analytical chemistry, physical and biological chemistry are the parts of general definition “Chemistry”.

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Calling Cards Cookbook

Friday, October 26th, 2007

A phone card or calling card - a phone credit card with a Personal Identification Code named also (pin) used for a pre-selected international carrier when away from family or office. Universal international telephone calling plans allow to ring up a phone anywhere with a Phone Card dialing a preregulated number (often Toll Free). It is not 100 without a cost, like a few Voice over IP carriers guarantee, but the admirable quality is really better and you doen't have to be online to make a call. Try now!

International phone card are rather sparing, often significantly cheaper than collect calling, coin operated payphones or having the phone call invoiced to the motel room be it a call from Canada, USA, Mexico City, Australia, UK or India. (more…)

Bienvenue sur DebLab

Friday, July 27th, 2007

Ce site est consacr? ? la distribution GNU/Linux Debian Sarge

Il sert ?galement de support de cours pour les formations Linux de I.E.P.S.C.F Evere ? Bruxelles.

Plus d’informations sur le contenu des formations Linux et les modallites d’organisation.

Les cours :

bulletpoint Utilisation

bulletpoint Administration

bulletpoint Securite

bulletpoint A partir de fevrier 2006 : Special Webmaster

Ce site est en d?veloppement, tout n’est pas fini mais j’y travaille… N’h?sitez pas ? me communiquer toutes erreurs que vous trouveriez ? l’adresse linux.iepsevere@gmail.com.

Bon amusement, Fabian Semal.