"Scientific research" Almanac

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  INFORMATION SYSTEMS IN HOSPITALS – STATE AND PERSPECTIVES

  E-Healthcare is a fast growing area which includes collaboration of medical in-formatics, public healthcare and health services and information sharing through using contemporary information and communication technologies. The strategic goal in establishing e-Healthcare is to achieve better health status and quality of life for Bulgarian citizens ... E-Healthcare is a fast growing area which includes collaboration of medical in-formatics, public healthcare and health services and information sharing through using contemporary information and communication technologies. The strategic goal in establishing e-Healthcare is to achieve better health status and quality of life for Bulgarian citizens through providing access to high-quality health services. Taking this into consideration, the present study reveals the current state of medical information systems and highlights possible perspectives for their improvement through modern and effective information technologies.

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  EQUILIBRIUM IN STOCHASTIC OPTIMIZATION MODELS WITH ECONOMIC APPLICATIONS

  The subject of this work is the application of a linear quadratic model which is a result of the stochastic modeling process in the economic field. A dynamic economic process is modeled, which occurs in conditions described by a stochastic differential equation. The dynamics of the process is subject to jump-like changes. Such systems are known as ... The subject of this work is the application of a linear quadratic model which is a result of the stochastic modeling process in the economic field. A dynamic economic process is modeled, which occurs in conditions described by a stochastic differential equation. The dynamics of the process is subject to jump-like changes. Such systems are known as Markov jump linear systems. The target in the observed process is modeled through a functional which has to be minimized. The result is a linear quadratic stochastic model. The equilibrium search model is related to the numerical solution of a system of generalized discrete-time algebraic Riccati equations. Methods for finding the maximal solution to a system of discrete-time algebraic Riccati equations are investigated. Moreover, new methods and algorithms for computing of this maximal solution are proposed. The numerical characteristics of algorithms are analyzed in special cases of negative definite weighting matrices and indefinite weighting ones. Conclusions are derived of the applicability and efficiency of the proposed methods.

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  ECONOMIC PROBLEMS OF ENERGY DEVELOPMENT – RENEWABLE ENERGY SOURCES AND ECONOMIC EFFICIENCY

  The scientific research on the topic: „Economic problems of energy development – renewable energy sources and energy efficiency” is of theoretical and practical character. One of the most important aspects of energy production for overcoming the scarcity of raw materials is associated with the use of renewable energy sources. These sources are ... The scientific research on the topic: „Economic problems of energy development – renewable energy sources and energy efficiency” is of theoretical and practical character. One of the most important aspects of energy production for overcoming the scarcity of raw materials is associated with the use of renewable energy sources. These sources are regarded as a key factor for switching to low carbon economies, ensuring security of energy supply, development of new high-tech industries and providing the so-called „Green growth”.