CoLiTec published article in Odessa Astronomical Publications

CoLiTec Team published new article “Virtual observatory and CoLiTec software: modules, features, methods” in «Odessa Astronomical Publications» journal, which is included in the science database of NASA – Astrophysics Data System (ADS).

We describe complex processing system created by the CoLiTec project. This system includes features, user-friendly tools for processing control, results reviewing, integration with online catalogs and a lot of different computational modules that are based on the developed methods. Some of them are described in the article.

The main directions of the CoLiTec software development are the Virtual Observatory, software for automated asteroids and comets detection and software for brightness equalization.

The CoLiTec software is widely used in a number of observatories in the CIS. It has been used in about 700 000 observations, during which 1560 asteroids, including 5 NEO, 21 Trojan asteroids of Jupiter, 1 Centaur and four comets were discovered.

Use full citation in scientific articles during CoLiTec using:

«Pohorelov A. V. Virtual observatory and CoLiTec software: modules, features, methods / A. V. Pohorelov, S. V. Khlamov, V. E. Savanevych, A. B. Briukhovetskyi, V. P. Vlasenko // Odessa Astronomical Publications. – Vol. 29 (2016). – P. 136–140. doi: 10.18524/1810-4215.2016.29.85152»


Automated Controllers Functioning Criteria in Content Distribution Systems

Authors: Vitalii M. Tkachov, Vadym E. Savanevych

Abstract: This paper describes content distribution systems (CDS) used in telecommunication datacenters. First or last, the CDS becomes large, and its detailed engineering can not be performed during reasonable time span. Therefore, its optimization is out of question. In this case, formulating a model for a huge system functioning, not the system optimization, is required. This paper describes the problem of automated controllers functioning in telecommunication up-diffused datacenters. We propose the functional criteria of the practicability CDS behavior agreed with a specification of earlier informational system criterion. It belongs to a class of additive functional-cost criterion. The mentioned problem of CDS functioning can be solved using the Lagrange’s method of undetermined coefficients. This allows to develop the system with minimal average costs during the extended period of its operational time under conforming to the possibility of tasks solving. At that the behavior model parameters values are equivalent to the corresponding Lagrange coefficients. The presented approach can be practically implemented in the suballocated service systems or the
systems working according to the “observer-subscriber” principle.

Link to an electronic resource: “Automated Controllers Functioning Criteria in Content Distribution Systems”