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Influence of magnetic weather on dogs
Junas, Tomáš ; Nováková, Petra (advisor) ; Mrkvičková Kořanová, Diana (referee)
The bachelor thesis deals with the theme of magnetism, if you like magnetic influence of weather on dogs. The first part is devoted to a literature review on the issue of magnetism and researched breeds. The practical part contains the research on the influence of magnetic field on the orientation of the dog in the water intake. Three dogs were studied using a photo-trap. In all three dogs was statistically found preference of the south-west direction, which does not correspond to previous research. The cause of the deviations could be e.g. high-voltage lines, the fluctuation of the earth's magnetic field, or a local anomaly of the magnetic field. Economic analysis of breeding the dog, it was found that the breeding of these breeds cannot be considered as gainful activity.
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Magnetic orientation of spider webs of the Amaurobiidae spiders
Volf, Martin ; Nováková, Petra (advisor) ; Mrkvičková Kořanová, Diana (referee)
Abstract
First of all in theoretical part of my bachelor thesis I deal with general characteristics of spiders and more specifically Amaurobiidae spiders. My first section summarizes information about magnetoreception as an ability to sense the Earth´s magnetic field. Next I describe basic information about three theories that represent models of functioning magnetoreception. Electromagnetic induction theory is based on the principle of an electric circuit through which flows electricity. Chemical magnetoreception theory or free radical theory is based on complex biochemical reactions which are produced by magnetic field and includes pairs of free radicals as intermediates. And the last but not least magnetite theory that presume presence of magnetite in various tissue which acts as a magnet, and at the moment of trying to compare with magnetic field applying pressure to the secondary receptors or directly affects the activity of nerve cells. Further I describe various forms of magnetic orientation for example magnetic compass, magnetic alignment and magnetic map. The end of the theoretical part is about the general knowledge of magnetoreception and magnetic orientation in Amaurobiidae spiders.
The practical part is about my own research. I examined magnetic orientation of particular spider webs at 3 locations. I tried to find varied locations in different forest stands and slopes. My data collection was more difficult because of meteorological conditions. Long sweltering summer completely dried forests and all animals activity was inhibited. Then it came dramatic cooling and large amounts of rainfalls. In 2015 wasn´t basically a kind of transition phase between summer and autumn. Finally I gathered all data that I needed, and from the statistical processing clearly concluded that the resulting vectors were most commonly ranged from 100° to 180°. More than 60% spider webs were oriented southeast to south. Of course I founded exceptions and curious cases.
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Spectral analyzing and characterization of magnetic atoms and investigating superconducting films in low temperature STM
Cahlík, Aleš ; Jelínek,, Pavel (referee) ; Šikola, Tomáš (advisor)
This work is divided in two thematic parts. The first part shows a refurbishment of a Omicron low temperature STM set-up and its utilization for preparation of superconducting-magnetic interfaces. First, a cleaning procedure of suitable metallic substrates, specifically W(110) and Ir(111), is shown. It is followed by results of iron monolayer deposition on Ir(111) (Fe-Ir(111) interface). The last section deals with study of vanadium growth on pure Ir(111) substrate as well as on mentioned Fe-Ir(111) interface. The second thematic part deals with magnetism of cobalt atoms on a monolayer metal dichalcogenide WS2. It focuses primarily on studying their magnetic moment and magnetic anisotropy using X-ray magnetic circular dichroism (XMCD).
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Change of magnetic susceptibility during the germination of plants
Sedlář, Petr ; Fiala, Pavel (referee) ; Vlachová Hutová, Eliška (advisor)
The work examines the changes in the magnetic susceptibility during the early germination of the somatic embryo (RSE) of the Norway spruce. Susceptibility is in the physically view the property, which can be used to determine a variety of parameters and properties of the measured objects. The aim of this work was to create a automatic to evaluate the susceptibility of the tissue RSE and take measurements to prove or disprove the contrary of the accuracy of this assessment. This work contains the results obtained by modeling a script in Matlab, in which can be shown the correctness of the theoretical concepts.
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Electromagnetic pulse accelerator of projectiles
Žamberský, Jan ; Jirák, Josef (referee) ; Frk, Martin (advisor)
Tato práce se zabývá použitím magnetického pole k urychlení projektilů v zařízení zvaném coilgun. Je složena ze dvou částí, z nichž první je teoretická diskuze o magnetismu a jeho využití, druhá část je o vlastním coilgunu, jeho výhodách a nevýhodách. Následuje série měření na dvou experimentálně postavených coilgunech a jejich optimalizace pro dosažení co nejlepších výsledků. První část probírá více témat. Na začátku je krátká kapitola, ve které se definuje magnetické pole a s ním související konstanty a jevy. Další dvě kapitoly jsou zaměřeny na různé typy materiálů, především feromagnetik, jak reagují na přítomnost magnetického pole a jakými parametry jsou specifikovány. Dále je výčet některých aplikací magnetizmu napříč lidskou společností. V druhé části se popíše princip coilunu a jak byly prototypy vyrobeny. Měření na prvním prototypu je zaměřeno na testování různých materiálů projektilu, jeho rozměrů a přínosy externího magnetického obvodu okolo cívky. Taktéž je tam kapitola pojednávající o způsobu měření rychlosti projektilu. Druhý prototyp se snaží eliminovat nedostatky zjištěné na prvním a prozkoumat výhody vícenásobného urychlení na dalších stupních.
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Design and Realization of the Bird Cage Coil for MRI
Sedlář, Petr ; Drexler, Petr (referee) ; Nešpor, Dušan (advisor)
The work deals with the design and experimental production of the model type Birdcage coil used for magnetic resonance imaging system (MRI). The work deals with the design and behaviour of the model type Birdcage coil volume designed for imaging system for magnetic resonance imaging (MRI). Volume coils are generally very useful for use in MRI, because in transversal design allow easy access into the cavity when the flow vector of magnetization. The aim of the work was to construct a numerical model of transversal coil type Birdcage of the predefined dimensions. The created the coil tuned the desired resonant frequency having regard to maximize performance in the measured sample migrated. The modeling coil experimentally produced and measurements also confirm the accuracy of the numerical model.
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Interaction of architecture with geomagnetic field
Holá, Magda ; Ing.David Eyer (referee) ; RNDr.Eleonora Čermáková (referee) ; Menšíková, Naděžda (referee) ; Žabičková, Ivana (advisor)
With the application of new technological trends and principles of scientific research in general, places on environmental influences (everything what surrounds human - building interior and exterior materials, urban areas) and also with sustainable development and ecology, etc., and on health and psychological well-being humans and thus puts on architecture and building entirely new demands on the application of new principles. Due to global climate change, which recently published the official report of the International Panel on Climate Change (IPCC), are placed on reducing the emissions into the atmosphere greater demands on. If architects previously were requested by the client, building with optimal solutions and functional expression of aesthetic quality, so now in addition to increasing demand on building´s solution with low power consumption using environmentally friendly materials from renewable resources and completely satisfying idea of sustainable development. Global societal trends is reverting to the traditional approaches to creating an environment (the application of natural materials, Feng Shui, Building Biology, etc.). The growing trend in today's society on issues of sustainable development, conservation of natural conditions, examining the effects of construction on human health and psychological well-being, which the aims bring together experts seemingly unrelated fields such as geophysics, medicine, architecture, civil engineering, etc., and their findings, according to aspects of the disciplines draw general rules of healthy living. Emerging and still evolving field aims to examine the relationship between man and his environment. The logical starting point is therefore in the context of examining the structure of the first dwelling. Buildings where people spend at least one third of their life. Building, whose location, orientation, mass, materials used in building itself as well as those that surround people in the interior, and many others will affect the physical and physiological action. Not only health but also mental well-being of man is as much determined by a whole range of relationships and linkages. Structural system guidelines for healthy living is the main reason of the work, clear what assumptions we have taken into account in the design and how it specifically relates to a quality place to rest – the Geomagnetic field is one of the base point, which lead to healthy living. Interaction of architecture and geomagnetic field and their values are processed in the evaluation system. It would lead to clarification of the relationship between the occurrence of these anomalies and building materials, construction, site selection for construction of buildings and other solutions. I will desribing the relationship between human´s health and the incidence of these artificial or natural anomalies at the same time.
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Influence of magnetic field on photovoltaic solar cell
Kadlec, Michal ; Šubarda, Jiří (referee) ; Šimonová, Lucie (advisor)
This thesis describes the issue of PN junction of photovoltaic cells, photovoltaic effect physics, basic materials used in photovoltaic and their properties, important for the area of photovoltaic. It deals with the problems of magnetism focused on electromagnetic fields. Experimental facility for measuring the influence of magnetic field on the solar cells through the Helmholtz coils was constructed. This work also dealing with the influence of magnetic radiation on photovoltaic cells and the influence of electromagnetic waves on the volt-ampere characteristics of the photovoltaic cell.
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Didactic games and their inclusion to physics teaching at basic school
BRABCOVÁ, Jitka
The diploma thesis Didactic games and their inclusion in physics education deals with its play in physics teaching at the second grade of primary school. It focuses primarily on electricity and magnetism and is complemented with the possibility of extracurricular activity and formation of positive attitude towards this area of physics and physics as a whole. The work is divided into a theoretical part, which engages in the theory of games, game didactic requirements and methods of its inclusion in the lesson. Furthermore, the motivation and the end of the theoretical part consists of an analysis of electricity as a topic and magnetism in terms of RVP and school educational programs, including cross-cutting themes and key competencies. The second part deals with the various types of games. A general view includes games with physical principles that can be purchased in our market, computer games and options of educaching. The main part of the educational games contains rules and recommended way of games´ categorization. Plays are divided into chapters. According to their use. Games for one pupil , games and activities for the division of students into groups, games for creative thinking and development of communication, games in the role - " role playing ", games for remember, knowledge games, motion games, card games, relaxing games motivated by electric current, games with a physical base. The conclusion is included verification of using games in the classroom, which is based on observation, pupil´s questionnaire and test of students' knowledge in the chosen field.
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