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Solved Problems in Physics for Electronic Collection - Alternating current
Pfefrčková, Michala ; Koupilová, Zdeňka (advisor) ; Koudelková, Věra (referee)
Title: Electronic Collections of Solved Problems in Physics - Alternating current Author: Michala Pfefrčková Department: Department of Physics Education Supervisor: RNDr. Zdeňka Koupilová, Ph.D. Supervisor's e-mail address: zdenka.koupilova@mff.cuni.cz The main aim of this diploma thesis was to prepare a set of specialized tasks in Physics. These tasks are supposed to contain comprising structured hints leading to solution of the given examples. The set is implemented in the e-collection posted on http://fyzikalniulohy.cz. This set includes 25 tasks mostly targeted on high schools students. It supplies them with additional tasks for effective study suitable even for university students, starters, as a revision. The other part of the thesis contains a syllabus of alternating current study and the organization of the tasks how to use them to illustrate clearly the particular physical terms. Keywords: alternating current, structured tasks, e-collection, syllabus
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Nikola Tesla - Genius, who changed the World
Fexová, Lucie ; Beneš, Zdeněk (advisor) ; Čechura, Jaroslav (referee)
Nikola Tesla - Genius who changed the world This bachelor thesis tells the story of life and work of Serbian inventor Nikola Tesla and it's mainly dedicated to years, which he spent in America. In the context of that time it highlights the importance of his inventions, some of which have significantly affected today's technology. The largest part of the work, occupy two Tesla's long life disputes which affected his career and personal life. The first one of these, "war of currents", was between Tesla and Edison. The second one between Tesla and Marconi passed because of invention of radio. The development of both disputes is described from the historical, economical and technological side, which focuses on the consequences for today's world. At the end of the text, there is a brief presentation of lesser-known Tesla's inventions and various recognitions which he received for his contribution to science.
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Nikola Tesla - Genius, who changed the World
Fexová, Lucie ; Beneš, Zdeněk (advisor) ; Čechura, Jaroslav (referee)
Nikola Tesla - Genius who changed the world This bachelor thesis tells the story of life and work of Serbian inventor Nikola Tesla and it's mainly dedicated to years, which he spent in America. In the context of that time it highlights the importance of his inventions, some of which have significantly affected today's technology. The largest part of the work, occupy two Tesla's long life disputes which affected his career and personal life. The first one of these, "war of currents", was between Tesla and Edison. The second one between Tesla and Marconi passed because of invention of radio. The development of both disputes is described from the historical, economical and technological side, which focuses on the consequences for today's world. At the end of the text, there is a brief presentation of lesser-known Tesla's inventions and various recognitions which he received for his contribution to science.
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Solved Problems in Physics for Electronic Collection - Alternating current
Pfefrčková, Michala ; Koupilová, Zdeňka (advisor) ; Koudelková, Věra (referee)
Title: Electronic Collections of Solved Problems in Physics - Alternating current Author: Michala Pfefrčková Department: Department of Physics Education Supervisor: RNDr. Zdeňka Koupilová, Ph.D. Supervisor's e-mail address: zdenka.koupilova@mff.cuni.cz The main aim of this diploma thesis was to prepare a set of specialized tasks in Physics. These tasks are supposed to contain comprising structured hints leading to solution of the given examples. The set is implemented in the e-collection posted on http://fyzikalniulohy.cz. This set includes 25 tasks mostly targeted on high schools students. It supplies them with additional tasks for effective study suitable even for university students, starters, as a revision. The other part of the thesis contains a syllabus of alternating current study and the organization of the tasks how to use them to illustrate clearly the particular physical terms. Keywords: alternating current, structured tasks, e-collection, syllabus
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Mathematics in Physics
BLAŽEK, Jiří
The presented work deals with mathematical tools, which are used to describe harmonic oscillations and waves in secondary schools. Harmonic quantities are most frequently represented as projections of rotating symbolic vectors ? phasors, nevertheless most attention is paid to representation of harmonic quantities by complex numbers. It is shown that both these methods are in fact formalized methods of solution of differential-algebraic equations, describing relevant physical phenomena. All these approaches are applied simultaneously and compared to each other during solution of model examples. The work is primarily intended for teachers of physics in secondary schools and for students of physics of pedagogical faculties.
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The electrostimulation the spermiation in the crayfish
KUBEC, Jan
The crayfish are important and indispensable animals in aquaculture. In the aquatic environment, they have a role as predators, food for other fish, detrivors and they are an important element in the circulation of the energy and the nutrient in the aquatic ecosystem. Today, number of the european crayfish species populations is decreasing. It is caused by unfavourable regulation of streams, water pollution and the occurence of crayfish plague. The main purpose of present study was examining the impact of electrostimulation on the males of the crayfish and obtaining sex products (the sperm). The principle of this research was determining whether the male of crayfish are able to extrude spermatophore with sperm by an electric stimulus. The transformer was used as resource alternating current in experiments. All experiments conducted in a laboratory of experimental device for fish farming in Vodňany. Experiments were conducted in 2011 on a male of the spiny-cheek crayfish (Orconectes limosus), the signal crayfish (Pacifastacus leniusculus) and the red swamp crayfish (Procambarus clarkii). The results of this work and success of the experiments suggest, that electrostimulation could be used for obtaining sex products (the sperm) from crayfish males. Results from a laboratory of electron microscopy confirm the harmlessness of electrostimulation on the shape and structure of sperm. The sperm can be used to artifical insemination of the crayfish eggs in future. However, sperm capacitation is problematic.
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