World science
Science uses from the drinking water aqua fresh to sleeping on the bed in an AC room wind by the air-condition technology.
The modern age in which we are living is the age of science. In every walk of life we depend on science. Science has given us a lot of comports. We have progressed so much only due to science. Science has shortened the time and space and has lengthened the span of life.
Science is knowledge. Man is endowed with the reasoning power. He thinks about his needs and comforts. Based on them, he discovered various things.
More uses from the science
Science is more useful in human life. Every thing is from the science day to night.
Man invents new things also. He finds out the ways to fulfill his needs with the help of science. Science is a systematic knowledge and the man who uses this knowledge is called a scientist. Whatever we finds out or makes is called his invention. Many scientists have invented many things for our comforts and fulfill our needs.
Science improvement
You go to a distant place sitting in a railway train. An engine, either steam engine or diesel engine, pulls the train. Steam engine was invented by James Watt, who was a great scientist. Now these steam engines have been replaced by diesel engines and electrical engines.
You fly in the sky like birds. You can reach any part of the world within a few hours. Do you know who invented this airplane? Wright brothers invented the aero plane and made our long journeys fast and comfortable.
We can’t do any thing without electricity. Next to air, water and food there comes electricity which is most necessary for us. It was Volta who invented electricity. Electricity helps us in many ways. It gives us light, moves our fans, cooks our food and runs our mills and factories.
Marconi was also a great scientist who invented radio, TV and wireless. With the help of telephone and wireless we can talk to anybody in any corner of the world. On television we can see the acting artists and hear their voice.
Science had made a lot of contribution in the field of medicine and surgery. Most of the incurable diseases are now curable. Thus the span of life of man has become long.
The most astonishing invention of science is journey to the moon and other planets.
We are using computer and internet. To day robot is working as a man. See, the how science technology improved and developing.
Independense and confidence are the two key factors that help us to achieve our dreams and goals in our life.Visually impaired people find themselves challenging to go out independently and pursue thier task lying ahead.There are about 21 million visually impaired people in the world who are need of helping hands.For many years the white cane as been most commonly used travl aid by the blind.The biggest disadvantage is that the user has to be trained a lot and the user isforce to scan manually the vicinityfor obstacles
""Success comes in cans,failure comes in cants"" .Gulping this energy capsule i came up a dream for the blinb-THRINETHREAM..the only cane in this world with intelligence.Thrinethream can answer all the problems taht thr blind people face,very intelligently.It is an automatic accelearating and steering device that can navigate the blind blind people safely among obstacles while walking in the road
Given the sophistication of the human vision system, the predilection of human beings by striking images is not only a great part of the brain dedicated to vision and visual analysis but also the ability to transport information (width band) of our visual system is far greater than any other of our senses.
All images and paintings known to the human face are the most important source of information. When we talk face to face with another person, we get more information on facial expressions rather than their words or voice quality combined.
In fact, psychologists have found that when we talk face to face, the meaning of words transfers only seven percent of what is communicated. Another thirty-eight percent comes from how those words are. That leaves fifty-five percent of communication, taking the form of visual cues.
The problem is that in the global environment of business now face-to-face communications have become an expensive practice, with a high consumption of time and it is frequently omitted. It then makes use of means such as telephone, fax or modem to meet the needs of communication between companies. "Videoconference today offers a solution to this need for accessible communication systems that enable the transmit and receive visual and audible information between different points or areas to avoid the costs and loss of time that involve physical movement of the person, all at ever-lower costs and higher quality signal. " These advantages make the video the fastest growing segment in the area of telecommunications.
Applications For Videoconference
The decline registered in substantial video conferencing equipment as well as cheaper and availability of communication services has made the video industry the fastest growing market in the teleconference.
With video conferencing, a critical meeting takes only a few minutes to organize. Furthermore prevent mistakes and are always available. Through them, information is always fresh, accurate and timely. Cancel an important meeting, advance or postpone it is very easy, thus eliminating the problems this could entail having to cancel the purchase last minute tickets, or booking flights, etc.
Currently, most innovative companies in the world using the first video to:
Administration of customer agencies.
Boards of Directors.
Crisis management.
Customer Service.
Distance education and learning.
Development of engineering.
Reunion executives.
Financial Studies.
Coordination of projects between companies.
Control of manufacturing.
Medical Diagnostics.
Coordination of mergers and acquisitions.
Management's management information system.
Management and support of purchase and sales.
Recruitment and interviews.
Monitoring.
Training.
Shorten development cycles of its products.
Communicate with your suppliers and partners.
Improved product quality.
Interviewing candidates for a given position in the company.
Manage the union or consolidation of companies.
Manage the company more effectively.
Get immediate support on products or services abroad.
Types Of Videos
Videoconferencing over the Internet.
Equipment necessary to perform their respective operations through a videoconference via the Internet look like a separate level of importance (Hardware and Software Requirements and Process via Internet videoconferencing).
Via videoconference through TV VideoPhone.
To make a video through the TV via VideoPhone need the following equipment:
A television whose resolution is optimal for viewing the video, we recommend a TV 21 "or more.
CAMCORDER * A camera which includes its own software, memory and the encoder / decoder.
A telephone line.
A phone that will bring the options of pulses and tones, we recommend the choice of tones.
A VCR and a computer VC5055.
Wiring: Telephone cable with RJ-11 connectors
Power cable
Coaxial cable.
Description of practice facility
It is necessary to connect the computer to dial the phone and VC5055 in their RJ-11 connectors.
Then you connect the camera to the computer CAMCORDER VC5055 in their respective video and audio inputs.
Tickets for video and audio equipment VC5055 should be connected to the output video and audio equipment VCR.
The output video and audio equipment VC5055 be connected to the input of video and audio from the TV.
The entrance to the TV antenna is connected to the output of the VCR's antenna equipment.
The entrance to the VCR antenna equipment goes directly to the external antenna or cable.
The team leaves for connecting the outlet of 110 volts.
Note: The same setting must be taken into account in the audiovisual remote.
General Operation.
Once installed and running the system in two audiovisual items is to make the video:
Suppose a user wishes to begin to communicate through the system it should take the phone and dial the code (phone number) assigned by the computer to the remote, once communication with the remote it will send video captured by the camera and audio captured by the phone's microphone to the source, which receptive audiovisual information via the TV, and vice versa.
We must note that sends the information to the camera at the TV is done by teams that are VC5055 VCR and equipment whose function is to convert digital signals into analog and vice versa, also controls the delay that exists to send signals video which aims to synchronize the audio with the video phone for the reception of audio-visual information is seen and heard by all participants in real time.
Description
ISO standards for storage and recovery audiovisual.
The MPEG Standard Group (Moving Picture Experts).
The standards of ISO have established a working group, known as MPEG (Expert Group on moving image) to develop three standards for coding audiovisual signals for storage in digital media. The speeds for the three standards (MPEG1, MPEG2, MPEG3) are 1.5, 10 and 40 mbps respectively. The MPEG1 standard has three parts or layers (system, video, audio), which are mentioned briefly below.
Layer systems:
A string of bit ISO is built in two layers, the outer layer is the layer system and the inner layer called compression. The system layer provides the functions necessary to use one or more strings of bits in a compressed system. The parts of video and audio of this specification define the compression coding layer for audio and video data. The coding of other data types not defined by the specification, but are supported by the layer system, allowing other types of data are attached to the compression system.Extended system:
Extended Systems is the name given to a number of additional capabilities not provided by the system baseline. Each series is designed to work with, or be constructed from the internal components of the baseline, with the aim of expanding their operation modes. These optional capabilities, which include arithmetic coding, reconstruction and progressive "progressive lossless coding, and others, can be implemented individually or in appropriate combinations.
Arithmetic coding is an optional alternative, "modern" Because the arithmetic coding method is adapted to the chosen parameter values of the image, usually provides from 5 to 10 percent better compression than Huffman method chosen by JPEG. This benefit is offset by the increase in the complexity of the system.
Rebuilding progressive alternative to the reconstruction sequence is specifically useful when using databases of images with little channels of communication bandwidth. For coding progressive: first, a "coarse" is sent, then the refinements are sent by improving the quality of the image "coarse" until the desired quality is achieved. This process is carried out by applications such as databases of images with multiple resolutions and different quality requirements, in freeze frame video, photo videotext for low speeds.
Lossless coding refers to the progressive compression method, which operates in conjunction with the progressive reconstruction. In this mode of operation, the final stage of the reconstruction results in a progressive image, which is received bit by bit identical to the original.
The standard JBIG (United Group for bi-level images).
Some years back, a group of experts was formed to establish an international standard for coding of bi-level images. The JBIG (group united for bi-level images), JBIG has developed a document entitled "Progressive compression standard for bi-level images", which defines a method for compressing bi-level images (ie, an image black and white). Because the method is adapted to a wide range of features of images, encryption is a technique very robust.
The JBIG standard operates in the sequential mode and in the progressive mode. When decoding a progressively encoded image, an image of low resolution compared to the original is available first, the image resolution increases as more data are decoded. Progressive coding provides two benefits, the first is that a database of images can serve different output devices each with different resolutions. Only with such information in the file compressed images for the reconstruction to the resolution of the output device in particular needs to be sent and decoded.
other benefit is that the progressive coding provides subjectively superior images (on a monitor) on communication links of low or medium speeds. A low-resolution image is transmitted and displayed quickly, with improved resolution to be away. Each stage of improvement of the resolution is constructed in the image already available.
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