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Knowledge Management Strategies
Full text linkThe article summarises the today recognisable, institutionalised knowledge management models by reviewing the basic problems of knowledge management. It shows the basic features, the focuses of examination, the effects of each tendency. Than the author gives models and a typological system to develop the knowledge management strategy
Some Methodological Questions of the Preparation of Forecasts
Full text linkThe direct reason of the development and the increase of the demand for prediction is to look for in the acceleration of socialeconomic development. At the end of the 19th century, and at the beginning of the 20th century have appeared those processes in the United States of America which changed basically the former, relatively calm market situation.The primary condition of making the future processes probable and possible is the connecting mode of the past-present-future, theexistence or lack of balance, the continuous or balk nature of processes.If the given phenomena has precedents and those are living further in the past in any form, the mathematical-statistical so calledhard methods get wide possibilities. But in those cases, when in lack of precedents a totally new developing period begins, the intuitive, professional so called soft methods come to the fore.The lecture analyses the theoretical and methodical questions connected to the above with the purpose to improve the quality andgoodness of the practical applications of prediction
Comparison of some contact elements and iterative algorithms for the solution of frictionless contact problems
No full textThe paper presents three different iterative algorithms for the numerical solution of contact problems. Each algorithm is based on the use of the finite element method. It is assumed that the contact conditions are fulfilled by means of special contact elements. Numerical results for the various contact elements and solution algorithms are then compared by solving 2D elasticity problems
Stress functions for torsion-free axisymmetric state of stress
No full textThe solution of problems of the theory of elasticity in terms of stresses requires the solution of equations of equilibrium. In two and three-dimensional application, the components of stress are frequently expressed in terms of partial derivatives of stress function, the correct expressions being chosen so that the conditions of static equilibrium become a consequence of partial derivatives independent of the order of differentiation. In this manner the solution of an equilibrium equation can be obtained without any difficulty. In this paper a systematic process is devised to derive the stress functions for the problems of torsion-free axisymmetric state of stresses. The applied method is based on the theory of total differentials. The stress boundary conditions are also formulated in terms of stress functions. The relations between the strain compatibility conditions and the stress functions are discussed. Different forms of solutions of equilibrium equations in terms of stress functions are also analyzed