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Authors focused on study of small communities of the social network Vkontakte. For this purpose, specialized program for collecting open data from such communities was developed, which is available in the public domain. The program is easy to use and allows you to collect data about the participants and calculate basic metrics of small communities. The output format is organized in a such way that it can be used without any additional processing in the program for analysis and visualization of networks – Gephi, which significantly enhances the capabilities of researchers. Numerical simulations were made to demonstrate features of the program.

Features of the keyboard handwriting analysis and in what areas they can be used are discussed in the work. Parameters by means of which the analysis of keyboard handwriting is carried out are considered.

In their conception the authors seek to prove that all planets revolve around their axes because of their satellites influence. In the article, in detail, gradually by the points (by logical steps), it is proved that the Moon rotates the Earth around its own axis, and that the Earth keeps the Moon strictly in such state, not allowing it to turn to us by other side (All satellites, more than 150, are in the same rigid stable state – are dependent on their planets.) And all the satellites in the Solar System are spinning around their axes from their satellites. The Earth and the Moon in this matter are not original. Researchers give evidence of a lack of a thermonuclear reaction to the stars. And they prove that the energy of solar radiation is electrical energy, not thermonuclear. And sunspots are not magnetic fields.

The graphs of cylinder-piston group’s temperature dependences on the changes of the engine speed are presented in this article. Experimental researches show, while using different working masses in pumping section it is possible to decrease cylinder-piston group’s temperature.

The article concerns the issues of trashing flaps of mung bean, technology of harvesting, the construction, producing thrashing of the flaps is proposed. Existing three methods of threshing mach culture are presented and analyzed as well as ways of thrashing are described. Advantages and disadvantages of these methods are overseen. According to the patent study the most appropriate device for thrashing of this culture is pointed out. According to studied properties and characteristics of the leaves and mung beans, a new method of threshing  mung bean flaps based on the features of this culture is proposed.

The paper considers the question of determining the thickness of the beater blade when interacting with the rods of a top-removing conveyor and the conclusion about the expediency of applying a new working organ for separating potato tubers from the tops.

The article represents an option of shared use of the solar energy equipment and traditional thermal equipment, which allows system to work from single heating room, and from solar energy in combined form. The graphs of the results of solar power measurements on different surfaces are represented. The formula obtained on the basis of measurements is given, which makes it possible to calculate the solar energy received per day.