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Video calling or voice calling through the use of the internet is a very common thing in today's world. Nevertheless, users have to pay charges directly or indirectly, tolerating all the delays even if you use the facility within the same network or sub-network. Over 30 million US households used Voice over IP (VoIP) until the end of 2010. Specialist found that 31.4% of the household used VoIP as the main and only home phone line by 2012. Users up till now have multiplied by a huge factor. There are several drawbacks of using video calling over the internet within a small network such as delay of packets (travel to the main server outside network and reenter the same network again), direct or indirect costs, users need to be always connected online and efficiency and speed of the user's system vary according to connection quality and bandwidth. In this project, we implemented a WebRTC enabled web application which provides free peer to peer video calling and conferencing tool for any private organization on top of their existing private network. [ABSTRACT FROM AUTHOR]

W endelstein 7-X is, as a stellerator, in principle capable of very long operation. The Control and Data-acquisition ( codac ) systems around w7x have, therefore, been designed for continuous operation. One aspect of this design is the recording of the absolute time of every measurement. Whereby for every relevant event, such as every sample-clock tick of every adc , the time is recorded as a 64 bit integer value. On the one hand, this approach has several advantages. On the other hand, it generates much more data to process and archive. In extreme cases it can lead to a multiplication of the data amounts. Compression of these time-stamps data can be expected to save storage and network resources. However, even though most of these time-stamps have a high degree of predictability, the normal, de-facto standard, compression approaches ( zip , flac , etc.) perform rather poorly on this type of data. Thus, inspired by well-known audio compression approaches, we developed a specialised loss-less compression algorithm, aimed at fairly constantly incrementing 64 bit long-integers. Experiments on data collected in the past demonstrate very large compression factors, whilst retaining all details in the timing data. [ABSTRACT FROM AUTHOR]

In this paper, the process state of electrical energy consumption in conditions of indeterminacy and insufficiency of information with the applying of data-compression methods such as Karhunen-Loeve expansion (KLE) and Principle Component Analysis (PCA) was appraised. As the result, the mathematical model of electric energy consumption process was introduced. This model was developed using statistical classification when nonuniform operating mode of electric loads. The mathematical model, which was obtained, allows considering parameters (factors) of mine production team and others, which have an impact on electro-energy intensity of production. [ABSTRACT FROM AUTHOR]