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  Characteristics of Bulgarian Economy during the World Economic Crisis 1929 – 1938

  The objective of this publication is to review the situation of Bulgarian economy during the world economic crisis from 1929 till 1933. The research employs empirical approach and comparative economic analysis. The effect of the crisis upon major sectors of Bulgarian economy, such as agriculture and industry, has been examined, as well as its ... The objective of this publication is to review the situation of Bulgarian economy during the world economic crisis from 1929 till 1933. The research employs empirical approach and comparative economic analysis. The effect of the crisis upon major sectors of Bulgarian economy, such as agriculture and industry, has been examined, as well as its impact on the state of domestic and foreign trade, the state finance and the circulation of currency. A conclusion has been made that owing to the economic policy which the government conducted at the time, Bulgarian economy performed relatively well during the economic crisis and succeeded in minimizing the negative consequences of the crisis.

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  A Linear Matrix Inequality Method for Stochastic Model on Markov Jump Linear Systems

  We consider a special class of linear quadratic stochastic models on Markov jump linear system. The aim is to find the best control function for a model. The search of the control function passes trough the computation of the maximal solution to a system of the general discrete time Riccati equations. An effective method for finding the maximal ... We consider a special class of linear quadratic stochastic models on Markov jump linear system. The aim is to find the best control function for a model. The search of the control function passes trough the computation of the maximal solution to a system of the general discrete time Riccati equations. An effective method for finding the maximal solution is the method of a linear matrix inequality (a standard method). In this paper we present two new modifications of the method of a linear matrix inequality. The numerical experiments for comparing the computational characteristics of the modified methods and the standard method are executed. The numerical experiments show the effectiveness of new methods to the standard method.

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  Order, Chaos, Control

  The accent is on the necessity to rethink the chaos as having considerable potential for the realization of unusual management practices. The crisis in the value system is a factor that causes disorder and the permanent values presume order. The article examines the relation between the social system and the natural environment, some management ... The accent is on the necessity to rethink the chaos as having considerable potential for the realization of unusual management practices. The crisis in the value system is a factor that causes disorder and the permanent values presume order. The article examines the relation between the social system and the natural environment, some management models in the aspect of the following categories: order, chaos, management, individualism and holism.