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Parallel FDTD simulation using Task Parallel Library (TPL)

100%

Bolesta I. , Demchuk A.

tom Vol. 24, nr 2

7--16

The finite-difference time-domain (FDTD) is a numerical analysis technique used for solving computational electrodynamic problems. The nature of the FDTD method is that simulation of big and complicated electromagnetic field problems requires a vast amount of computer operational memory and runtime. Parallel-processing techniques have been broadly applied to FDTD to accelerate the simulations. The parallelism of the FDTD algorithm is based on a fact that the computational domain can be divided into parts (sub-domains), and each processor in a parallel system deals with one or several sub-domains. The FDTD algorithm belongs to data parallelism model and can be effectively implemented on shared memory system architecture. The parallel FDTD method was implemented using TPL library. The Task Parallel Library (TPL) is a library for .NET that makes easy to parallelize the program using the advantages of .NET Framework. The speedup metrics of parallel FDTD algorithm were calculated and compared with Amdahl’s estimated speedup.

Choosing of typhlocommentator, description of subject in videocontent for sightless and visually impaired person

100%

Demchuk A. , Lytvyn V.

tom Vol. 4, No 1

25--29

The statement of problem of choosing of typhlocommentator is considered in this article, the description of the subject among the number of possible typhlocommentator. The mathematic model of such a task is given and an approach of solving it has been worked out. When researching the problem of access of weak-sight people to the video content, it is required to understand that more than a most part of the information is provided to the viewer in the form of an image. Yes, blind people hear all words of actors, sounds of the environment, processes at the screen, but it is difficult for them to identify the person to whom the specific words belong, what happens with heroes at the very specific moment, what is depicted in the given scene, it is difficult for them to understand reaction of actors, which the latter often express with the help of movements or mimics. Typhlocomments to video content for blind people and people with weak-sight are one of the real steps towards solution of the problem of limitation of access to such content.

Decision support methods in a competitive environment based on Boyd cycle by means of ontology use

80%

Lytvyn V. , Oborska O. , Demchuk A. , Krupa D.

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes

2017

tom Vol. 6, No 2

21--26

The method of decision making system elaboration in competitive environment based on ontological approach was developed. For scientific modeling of decision support process in competitive environment, mathematical support and methods of domain-specific ontology in the Boyd cycle (OODA – observation, orientation, decision, action) were elaborated.