|
Comparison of the Views and Attitudes of Pupils at Secondary Vocational Schools in the Field of Substance Abuse
Mazánková, Michaela ; Jirsáková, Jitka (advisor) ; Miroslava, Miroslava (referee)
Bachelor thesis entitled Comparison of the views and attitudes of pupils at secondary vocational schools in the field of substance abuse deals with a comparison of opinions and attitudes of pupils at secondary schools and vocational schools Obchodní akademie a Hotelová škola Havlíčkův Brod. The first part is devoted to general characteristics of risky behavior, causes of its origin, different types and prevention of risk behaviors . Analytical part is devoted to evaluation of the questionnaire and the results are compared opinions and attitudes of students of graduation schools and vocational schools, and point to the simultaneous occurrence of risk behavior studied in high school. Based on data evaluation are at the end of the work proposed specific preventive measures specifically for students of graduation schools and vocational schools.
|
|
Optical frequency references
Hrabina, Jan
Optical frequency references based on absorption cells represent a traditional and essential tool for frequency locking of precise laser standards. One of the most often used absorption media is a molecular iodine 127I2, which offers a rich atlas of strong and narrow absorption lines across mostly whole visible part of optical spectrum. The main disadvatage of this media can be seen in its high corrosivity and sensitivity to presence of foreign substances. This contribution is oriented to comparison of possible measurement methods for bulk- and also optical fiber- based iodine absorption cells quality and chemical purity testing.\n\n
|
|
Stability and convergence of numerical computations
Sehnalová, Pavla ; Dalík, Josef (referee) ; Horová, Ivana (referee) ; Kunovský, Jiří (advisor)
Tato disertační práce se zabývá analýzou stability a konvergence klasických numerických metod pro řešení obyčejných diferenciálních rovnic. Jsou představeny klasické jednokrokové metody, jako je Eulerova metoda, Runge-Kuttovy metody a nepříliš známá, ale rychlá a přesná metoda Taylorovy řady. V práci uvažujeme zobecnění jednokrokových metod do vícekrokových metod, jako jsou Adamsovy metody, a jejich implementaci ve dvojicích prediktor-korektor. Dále uvádíme generalizaci do vícekrokových metod vyšších derivací, jako jsou např. Obreshkovovy metody. Dvojice prediktor-korektor jsou často implementovány v kombinacích modů, v práci uvažujeme tzv. módy PEC a PECE. Hlavním cílem a přínosem této práce je nová metoda čtvrtého řádu, která se skládá z dvoukrokového prediktoru a jednokrokového korektoru, jejichž formule využívají druhých derivací. V práci je diskutována Nordsieckova reprezentace, algoritmus pro výběr proměnlivého integračního kroku nebo odhad lokálních a globálních chyb. Navržený přístup je vhodně upraven pro použití proměnlivého integračního kroku s přístupe vyšších derivací. Uvádíme srovnání s klasickými metodami a provedené experimenty pro lineární a nelineární problémy.
|
|
Characteristics of the working behavior of Czechs and Ukrainians
BYKOVA, Sofia
The aim of this work is to create a transparent and comparable characteristics of the work behavior phenomenon within the cultures of those states - what is common and what is different between them, or maybe incompatible .It is supposed to have some analysis of possible conflicts and their connection with the mentality. The primary reason of this aim choosing is the specialty I study. My work contains information that could be interesting and useful not only for me and my future job, but also for managers and other employees. Overview of examined issues contains specific points, such as the fundamentals of economic psychology and behavioral economics (symbiosis of psychological and economic opinion on motivation and rationality of individuals), theories of motivation and reaction to different occurrence, characteristic of the term "mentality", general points about the human impact of the world economy. For realizing the goals of my work the following hypotheses have been proposed - Czech and Ukrainian mentality have significant differences, though these cultures are close. - Ukrainian and Czech employees are able to work effectively in a team and find a "common language" in the workplace. The difference in mentality does not obstruct on it. - Employers could be interested in the Ukrainian employees taking into account their high concernment and motivation. All three of the hypotheses were confirmed by observed data and comparison of mentality characteristics. Czechs are often tolerant to other cultures, moreover Ukrainian culture is not much different and does not create difficulties in the working relationship. Based on the fact that the chosen company has no conflicts associated with work behavior and differences in mentality, it's hard to define my contribution to this organization work.
|
|
The effect of pyrethroid based pesticides on fish
RICHTEROVÁ, Zuzana
Pyrethroids are ones of the most used pesticides worldwides. The widespread use and high stability of pyrethroids lead to the assumption of that their occurrence in the environment could be quite frequent. They can reach water ecosystem as pollutants. Residues of pyrethroids are not only detected in the water column, but also in sediments and in fish tissues. The first study was devoted to the product Nexide containing 60 g.l-1 of active substance gamma-cyhalothrin. Tested Nexide concentrations were 5, 25, 50, 100, and 250 µg.l-1. Early life stage test was used.Common carp (Cyprinus carpio) was tested. There were significant mortalities in all concentrations except the lowest concentration during the trial. The lowest concentration tested 5 µg.l-1 only caused a slightly increased mortality. This lowest concentration influenced the growth in length and weight negatively, decelerated ontogenetic development, and made the body surface of the individuals darker. Histopathology of individuals from this concentration revealed dystrophy in liver. Examination of kidney, intestine and gills did not show significant histopathological differences compared with control. The evaluation of selected parameters of oxidative stress demonstrated a significantly higher activity of detoxification enzyme glutathione-S.transferase (GST) and a significantly lower activity of defensive enzyme glutathione peroxidase (GPx) compared with the control group. The other examined parameters of oxidative stress such as catalase (CAT), glutation reductase (GR), and lipid peroxidation determined by using the thiobarbituric acid-reactive substances (TBARs) were comparable to the control group. Changes in oxidative stress parameters suggest that exposure of the organism to the product Nexide in the given concentration leads to dysbalance of defensive enzymes. The second study was devoted to the product Cyperkill 25 EC containing 250 g.l-1. Tested Cyperkill 25 EC concentrations were 7.2, 36, 72, 144, and 360 µg.l-1. The procedure of the trial was the same as the preceded one. There were 100% mortalities in all concentrations except the lowest concentration during the trial. The lowest tested concentration 7.2 µg.l-1 allowed 90% of individuals to stay alive till the end of experiment. The lowest concentration influenced the growth in length and weight negatively and decelerated ontogenetic development compared with the control. Any individual exposed to this concentration did not reach juvenile stage until the end of the trial. Dark pigmentation was visible in 68% of these exposed individuals on the last day. Similar darkening was visible in individuals from higher concentrations shortly before death too. Histological examination did not revealed significant changes in intestine, liver, kidney, and gills compared with the control group. Evaluation of selected parameters of oxidative stress demonstrated significantly lower activities of GST, GR, and GPx. Activities of CAT and TBARS were comparable with the control group. Changes in oxidative stress parameters suggest that exposure of the organism to the product Cyperkill 25 EC in the given concentration could induce oxidative stress and interfere with the activities of antioxidant enzymes. The presented thesis summarises actual data about pyrethroids and their influence on fish. The demonstrated effects confirm high susceptibility of early developmental stages of fish to tested pesticides. When interpreting the results, we have to take into account the fact that studies showed this risk even on single pyrethroid substances. But water organisms are exposed to many other more or less toxic products and substances in a real environment. These xenobiotics could react with each other and their mixture could even potentiate negative effects. The performed studies also clearly show the significant differences in the sensitivity of embryonic and embryolarval tests.
|
|
Geographical aspects of religion – comparison of the Czech Republic and Austria
Pecharová, Kateřina ; Kokaisl, Petr (advisor)
The purpose of my thesis is to map a development of religion, mainly christianity, and its different geographical aspects of the Czech republics and Austrian territory. I´d like to compare individual indicators and using questionnaires and interviews answer these questions:
Nakolik tyto atributy může zachytit statistika?
What are the main attributes of religiosity?
The extent to which statistics capture these atributes?
How does faith and religiosity vary from each other?
How much does actual rate of religiosity and real faith vary?
Do the statistics give us a realistic information about religion and its part in mentioned countries?
Why do the rate of religiosity in the Czech republic and Austria vary so much from each other considering that they are neighboring countries.
Are Austrians considering their high rate of religiosity really more religious than Czechs as an atheistic nation?
|
|
Comparison of various methods of assassement of cultural landscape and landscape character in the Czech Republic and foreign countries
Blujová, Anna ; Fanta, Václav (advisor)
A landscape character represents certain landscape features which differs it from surrounding landscapes. Different methods of evaluation of landscape character are applied to express them.
The bachelor thesis is focused on methods of landscape character evaluation used in Czech Republic and in foreign countries. Their assessment was made as well as recommendation for specific situations.
For better understanding of this extensive issue a part of this work is dedicated to expressions like landscape, landscape category, landscape character, landscape character features including introduction to nature and landscape protection.
|
|
Tool to assess the landscape connectivity in different area units and dispersal distances
Chrumko, Adam ; Šímová, Petra (advisor) ; Krčílková, Šárka (referee)
The purpose of this diploma thesis is to introduce a basic summary of landscape connectivity calculations mainly focusing on the Conefor program and the effect of input parameters on output landscape connectivity indices. One of the main goals is to create an ArcMap Toolbox to simplify the calculation of landscape connectivity indices for many areas of interest. Basic squares that cover the whole Czech Republic were chosen as main areas of interest. These units are used for example for mapping the abundance of flora and fauna. The same indices were calculated for NUTS3 and LAU1 areas in order to compare effect of size of input areas. This thesis provides a simple solution in the form of a Python Toolbox for Esri ArcMap to calculate overall indices of landscape connectivity through a Conefor command line application for a large number of input areas. Forest connectivity for different dispersal distances and input areas of interest was calculated with this Toolbox. As an input vector layer of forests, CORINE land cover data from mapping period 1990, 2000, 2006 and 2012 were used. Input dispersal distances were chosen in the range from 50 to 50.000 meters in order to comprehensively describe their effects on indices. Resultant forest and connectivity changes are represented by cartograms; the effect of input data on output indices is shown in graphs.
|
|
Comparison of forest stands on afforested agricultural vs. continuously forested soil
Květoň, David ; Podrázský, Vilém (advisor) ; Jiří, Jiří (referee)
There are many differences between environment of woodlands on afforested agricultural lands and continuously forested soils. These differences are able to persist for many years after afforestation. It is anticipated differences in the growth and condition of these stands. This thesis deals with these differences and aims to compare them. There were compare differences between spruce stands and larch stands and differences between thickness of overlying humus in four plots of the size 0,25 ha, in the area laying near to village Brložec, in region of Karlovy Vary. Results moreless confirm a greater production of both species of trees on former agricultural lands, they indicate greater production potential of larch compared with spruce and they clearly show thicker humus to continuously forested areas.
|
|
Ekonomická analýza vybraného podniku
Nájemníková, Lucie ; Mach, Jiří (advisor)
Jako téma své diplomové práce jsem si vybrala Ekonomickou analýzu společnosti Unipetrol, a. s. Společnost Unipetrol, a. s. je předním českým producentem v oblasti rafinérských, petrochemických a agrochemických surovin. Vyrábí především motorová paliva, topné oleje, aromáty, agrochemikálie, saze a sorbenty a polyolefiny (vysokohustotní polyetylén, polypropylén). S ohledem na produkci uvedených komodit zajišťuje i jejich přepravu ke koncovému zákazníkovi, ať již velkoobchodnímu či maloobchodnímu.
Cíl diplomové práce bude, na základě vybraných metod, posouzení ekonomické situace společnosti, zhodnocení hospodaření. Dále jsem si jako cíl práce zvolila analýzu okolí podniku (dodavatelů, odběratelů), analyzovat důsledky vzniklé mimořádné události na hospodaření podniku a předložit návrhy a opatření pro zlepšení a stabilizaci ekonomické situace společnosti. Diplomovou práci rozdělím na dvě části. V první je zpracována teoretická část charakterizující obecnou problematiku ekonomické analýzy. Jednotlivé analýzy se týkají finančního zdraví společnosti a vnějšího a vnitřního prostředí. Ve druhé části chci charakterizovat společnost Unipetrol, a. s., popsat historii společnosti, odvětví a vypočtené ukazatele a rozbory analýz včetně jejich interpretace, srovnání situace před a po vzniklé mimořádné události
|
guest ::
