The Study of Ethyllactate Synthesis from Lactic Acide Salts

Diplomová práca sa zaoberá syntézou ethyl esteru kyseliny mliečnej (ethyl laktátu) z jej solí. V teoretickej časti bola spracovaná literárna rešerš so zameraním na výrobné technológie esterov kyseliny mliečnej, predovšetkým ethylesteru konvenčnými a nekonvenčnými spôsobmi. Taktiež na prípravu kyseliny mliečnej a jej soli fermentačným spôsobom, z ktorých môže byť následne vyrábaný ethyl laktát. V experimentálnej časti bola navrhnutá, zrealizovaná a overená funkčnosť laboratórnej aparatúry. Ďalej boli prevedené laboratórne experimenty na prípravu ethyl laktátu a methyl laktátu na tejto aparatúre.This diploma thesis deals with senthesis of lactic acid ethyl ester from slats of lactic acid. The literature review has been processed in the theoretical part of the diploma thesis. It is focused on manufacturing technologies of lactic acid esters, mainly on ethyl lactate by conventional and non-conventional ways of producing. Also the literature review involves producing of lactic acid and slats of lactic acid by fermentation because subsequently is possible produce ethyl lactate from that two substances. The laboratory apparatus for preparation of ethyl lactate and methyl lactate has been designed, realized and verificated function of it in the experimental part. There were carried out laboratory experimnets for production ethyl lactate and methyl lactate in this apparaturs.

Analysis of staff recruitment and selection in JF Dřevovýroba, Chrudim

Diplomová práce zkoumá v teoretické části získávání pracovníků, faktory ovlivňující získávání, metody a zdroje získávání, předvýběr a metody výběru pracovníků, přijímání a adaptaci nových pracovníků. V praktické části se analyzují tyto personální činnosti ve společnosti JF Dřevovýroba, s. r. o., Chrudim s použitím nejprve metody dotazníkového šetření. Další skutečnosti jsou zjišťovány na základě strukturovaných pohovorů s vedením společnosti, ostatními pracovníky a interních dokumentů společnosti. Cílem této práce je zjistit výkon personálních činností v praxi a porovnat je s poznatky odborníků v řízení lidských zdrojů. V případě zjištění nedostatků ve výše uvedených personálních činnostech, navrhuji jejich možná řešení vedoucí ke zlepšení těchto procesůMaster's thesis is doing research in the theoretical part in staff recruitment, factors of recruitment, sources and methods of recruitment, pre-selection and methods of staff selection, adaptation of new staff. The practical part includes analyses of these personal activities used in JF Dřevovýroba company by using methods of questionnaire research, at first. Further information is detected considering structured interviews with managers, other staff of this company, and internal documents. The goal of this thesis is to compare personal activities used in practice with findings of HR specialists. In case of finding some deficiencies in personal activities listed above, I propose their solution to improve these processe

Analysis of staff recruitment and selection in JF Dřevovýroba, Chrudim

Master's thesis is doing research in the theoretical part in staff recruitment, factors of recruitment, sources and methods of recruitment, pre-selection and methods of staff selection, adaptation of new staff. The practical part includes analyses of these personal activities used in JF Dřevovýroba company by using methods of questionnaire research, at first. Further information is detected considering structured interviews with managers, other staff of this company, and internal documents. The goal of this thesis is to compare personal activities used in practice with findings of HR specialists. In case of finding some deficiencies in personal activities listed above, I propose their solution to improve these processe

Dynamic Analysis of Meteorological Parameters in Košice Climatic Station in Slovakia

Evaporation and precipitation are often considered the most important processes in the water cycle. Recent studies have turned to chaotic analysis and short-term prediction for analyzing and forecasting the time series of such phenomena. However, even with chaos theory, the accurate forecasting of pan evaporation is not a straightforward business, as it involves a number of variables whose changes directly and/or indirectly affect the scale and amount of pan evaporation. In this study, the use of the false nearest neighbour method for the chaotic analysis of pan evaporation and related metrological parameters is discussed. A literature review is presented on chaos theory and its applications in modelling physical systems. Also, a review of the literature on multivariate analysis and the presence of chaos in meteorology are presented. A detailed procedure for finding the presence of chaos in a time series using false nearest neighbour (FNN) is discussed. The possible lag time to be considered in the FNN analysis is estimated using the autocorrelation function (ACF) and average mutual information (AMI) apart from the time-step of the measurement. Thus, FNN is studied with three different lag times of the time series. Six meteorological parameters: average temperature, relative humidity, wind speed, sunshine hours, dew point temperature, and pan evaporation are measured at the observation station Kosice in Slovakia for a period of 20 years. Thus, the available time series are analysed using ACF, AMI, and FNN methods, and the results obtained are analysed in the study. Nonlinear behaviour is seen in all of the observed parameters. Pan evaporation, average temperature, and dew point temperature are found to exhibit clear chaotic behaviour, while relative humidity, sunshine hours, and wind speed show stochastic behaviour