Wyniki wyszukiwania - BazTech

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Interdyscyplinarny charakter chemii sanitarnej

Szymański K., Włodarczyk-Makuła M.

Rocznik Ochrona Środowiska

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2015

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Tom 17, cz. 1

540--559

EN

Sanitary chemistry is a component of environmental chemistry, based on the issues of general, organic and instrumental chemistry. The level of chemistry development is important for the development of other scientific disciplines such as: environmental engineering or planning, design and protection of the environment. These disciplines are mentioned in the areas of technical, natural and agricultural sciences. As part of the sanitary chemistry research in two directions: the study of water and wastewater quality are conducted. The studies include an assessment of water quality of surface- and groundwater, which are the source of water supply for: population, industry and agriculture, water treatment processes and water monitoring. The wastewater research are concerning the wastewater introduced into the sewage system, wastewater treatment plants and to the receivers. The development of sanitary chemistry involves the development of analytical techniques and procedures in order to determine a greater number of pollutants in water and wastewater and enhancing the accuracy of compounds which has been already designated. Therefore, in framework of sanitary chemistry development following actions are performed: improvement of research procedures including the validation, design and construction of new measuring and control devices, automation of test equipment, including the coupled systems, determination of trace-level components: micro-pollutants, metabolic products, intermediate products, water and wastewater treatment, determination of "emerging contaminants", development of solvent-free techniques, minimization of cost, energy and the waste materials emission, the extension the scope of speciation analysis and their applications, development of biological methods in chemical analysis, introduction the continuous analysis into monitoring, improvement of the quality of chemical analysis results, statistical processing of chemical analysis, which allows on forecasting changes in water quality. Trends in the sanitary chemistry development in the world indicate a continuous improvement of analytical techniques and measurement and control appliances, the elaboration of new analytical procedures and develop existing ones.

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Coupling multistable systems: uncertainty due to the initial positions on the attractors

Kuzma P., Kapitaniak M., Kapitaniak T.

Journal of Theoretical and Applied Mechanics

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2014

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Vol. 52 nr 1

281--284

EN

We consider the coupling of multistable nonidentical systems. For small values of the coupling coefficient the behavior of the coupled system strongly depends on the actual position of trajectories on their attractors in the moment when the coupling is introduced. After reaching the coupling threshold value, this dependence disappears. We give an evidence that this behavior is robust as it exists for a wide range of parameters and different types of coupling. We argue why this behavior cannot be considered as a dependence on the initial conditions.

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Nonlinear normal modes of three degree of freedom mechanical oscillator

Perlikowski M.

Mechanics and Mechanical Engineering

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2011

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Vol. 15, nr 2

117-124

EN

In this paper we show the method of calculation of nonlinear normal modes and its application to mechanical coupled systems. We present bifurcation diagram of nonlinear normal modes in three degree of freedom system. We show the appearance of internal resonances and their important role in dynamics of nonlinear coupled oscillators.