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Dynamics of the bow shock and magnetopause
Jelínek, Karel ; Němeček, Zdeněk (advisor) ; Kudela, Karel (referee) ; Vandas, Marek (referee)
viii Title: Dynamics of the bow shock and magnetopause Author: Karel Jelínek Department: Department of Surface and Plasma Science Supervisor: Prof. RNDr. Zdeněk Němeček, DrSc. Department of Surface and Plasma Science e-mail address: zdenek.nemecek@mff.cuni.cz Abstract: The interplanetary space is a unique laboratory which allows us to dis- cover (i) a behavior of the plasma under different conditions, (ii) origin of its insta- bilities, and (iii) its interaction with obstacles such as the Earth's magnetosphere. The present thesis analyzes the outer Earth's magnetosphere. The results are based on the in situ sensing by a variety of the spacecraft (e.g., IMP-8, INTERBALL-1, MAGION-4, Geotail, Cluster-II and Themis). The solar wind curently monitored by the WIND and ACE spacecraft near the La- grange point L1 affects by its dynamic pressure the Earth's magnetic field which acts as a counter-pressure and the boundary where these pressures are balanced is the magnetopause. Due to supersonic solar wind speed, the bow shock forms in front of the magnetopause and a region in between, where plasma flows around an obstacle is named the magnetosheath. The thesis contributes to a deaper understanding of the dependence of magnetopause and bow shock shapes and positions, especially, (1) on the orientation of the inter-...
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ESWT in Achilles tendinopathy
Hojková, Lýdie ; Demeková, Júlia (advisor) ; Havlíčková, Michaela (referee)
Achilles tendinopathy is a painful condition formed by chronic overuse. Conservative treatement requires activity modification, heel lifts, arch supports, even immobilisation. There are often unsatisfactory results with it. The use of ESWT has recently been introduced in soft-tissue disorders including epicondylitis, plantar fasciitis, calcifitation of the shloulder and, as well, Achilles tendinopathy. The aim of the work was to introduce the effects of ESWT on soft tissues, types of generation and new posibilities in ESWT therapy in Achilles tendinopathy. Powered by TCPDF (www.tcpdf.org)
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The Effects of Extracorporeal Shock Wave Therapy in Treatment of Achilles Tendinopathy
Katolický, Jakub ; Machač, Stanislav (advisor) ; Novák, Jakub (referee)
Diplomová práce Účinky rázové vlny v léčbě tendinopatie Achillovy šlachy 1 Abstract This thesis focuses on the observation of the effects of low-energetic focused extracorporeal shock wave therapy (ESWT) in the treatment of Achilles tendinopathy. The theoretical part summarizes the current knowledge of anatomical, histological, kinesiological and biomechanical aspects of Achilles tendon (AT), as well as pathological processes, which can be described as Achilles tendinopathy, their differential diagnosis and treatment options. Last but not least, we present up-to-date information on the physical principles and biological effects of ESWT, not only in the treatment of AT diseases. The main goal of our research was to determine the effectiveness of low-energetic focused ESWT in the treatment of Achilles tendinopathy in comparison to the placebo group. The subject of observation was not only changes in clinical manifestations, but also possible changes in the morphology of AT using ultrasonography (USG). Methods: A total of 20 patients with symptomatic Achilles tendinopathy was included in the study, while only 18 of them completed the entire program, and therefore only the results of these patients were evaluated. They were randomly divided into two groups in 1:1 ratio. Group A was treated by ESWT with...
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Phosphine and nitrous oxide as false-positive biosignature gases in planetary spectra
Kaiserová, Tereza ; Ferus, Martin (advisor) ; Kopecký, Vladimír (referee)
5 Abstract This study is dedicated to evaluating the potential for a novel pathway of abiotic synthesis of phosphine (PH3) from phosphorus trioxide (P4O6) by a photocatalytic mechanism on aerosols. The mechanism might explain the recent possible detection of phosphine on Venus. This scenario has recently been suggested theoretically by our team based on an analogy with methane production form carbon dioxide on acidic photochemically-active surfaces of materials, which may account for a possible source of methane on Mars. Methane, just like phosphine, was suggested as an indicator of life on terrestrial planets, including Mars. The theoretical testing of photochemical phosphine generation suggests that even if this gas is present in the atmosphere of Venus it cannot be considered as an indicator of life until the suggested mechanism is excluded theoretically, or by experimental results, or direct evidence of life on Venus. This thesis will be followed by preparation of sophisticated experiments and intensive laboratory research addressing this. Furthermore, the role of nitrous oxide as another false positive biosignature was evaluated in this study. The presence of nitrous oxide can also be explained by processes other than biological, particularly on early planets. This study specifically demonstrates the...
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Consequences of heavy bombardment for chemical and prebiotic evolution on early Mars and Earth
Petera, Lukáš ; Ferus, Martin (advisor) ; Kopecký, Vladimír (referee)
The diploma thesis refers to the results of laboratory research dedicated to the influence of extraterestrial matter impacts onto a possible prebiotic synthesis on early Mars. The influence of understanding of early Mars chemistry for proceeding studies of terrestrian chemical habitus evolution and origin of life is discussed, as well as certain advantages to be made of this research within exoplanetary science. The prebiotic synthesis scenario purposed connects the hypothesis comprising a key role of extraplanetary bodies impacts played in the chemical evolution of an early Earth-like planet to the important processes studied within chemical evolution of life. Asteroid impacts are simulated by laser sparks, while post-impact thermochemical processes are mimetized in the laboratory by a controlled termolysis of certain key species in presence of meteorites, iron-rich clays and several other minerals and rocks presumably present in real impact craters. This particular field of research carried is likely to have an interesting application within current and future investigations of the Gale crater. Impactor mineraly is described on a particular example of a rare Porangaba meteorite, which, thanks to this research, has recently been addressed as a member of unique (comprising 32 bodies) family tree...
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High energy density plasma - induced transformations of early planetary atmospheres and their impact on early global climate
Kaiserová, Tereza ; Ferus, Martin (advisor) ; Šponerová, Judit E. (referee)
The goal of this bachelor thesis is to explore one of possible solutions to faint young Sun paradox, namely greenhouse effect incurred by increased concentration of N2O induced due to high energy plasma of meteorite impact. The series of experiments were done to simulate early Earth atmosphere under the effect of impact. The results of experiments were evaluated by infrared spectroscopy. It was found that under the right circumstances, concentrations of N2O created by impacts go from 5 to 38 ppm, which is concentration high enough to resolve faint young Sun paradox. Results presented in this thesis lead us to new path of solving the faint young Sun paradox and offer many important information for prebiotic chemistry on early Earth.
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Influence of the physical therapy on the pelvic floor rehabilitation
Podskalská, Patricie ; Hurt, Karel (advisor) ; Slámová, Adéla (referee)
OF BACHELORS THESIS Name, surname: Patricie Podskalská Supervisor: MUDr. Karel Hurt DrSc. Opponent: Title of bachelor thesis: Influece of physical therapy on the pelvic floor rehabilitation Abstract of bachelors thesis: The topic of this bachelor thesis is an influence of a physical therapy on the pelvic floor rehabilitation. The thesis consists of a theoretical and practical part. The theoretical part first describes problems related to pelvic floor dysfunction and continues with the summary of the most important parts of the examination, which are performed in case of suspicion of a pelvic floor musculature disorder. In the last chapter of the theoretical part the thesis discusses individual possibilities of the physical therapy and its effects on pelvic floor muscles. The practical part consists of two case reports of patients diagnosed with a chronic pelvic pain. The patients were treated with a shock wave therapy. A subjective evaluation of pain NRS (numeric rating scale) was used to evaluate the efficiency of the therapy. The aim of the thesis is to collect informations about the pelvic floor dysfunction and particular types of physical therapy used for its treatment. Key words: pelvic floor, pelvic floor dysfunction, shock wave, magnetic stimulation, electrical stimulation
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The effectiveness of shock wave therapy for plantar fasciitis
Průchová, Kateřina ; Pavlů, Dagmar (advisor) ; Malá, Jitka (referee)
Author: Bc. Kateřina Průchová Title: The effectiveness of shock wave therapy for plantar fasciitis Objectives: The main goal of this work is to assess the effect of the radial and focused shock wave therapy for plantar fasciitis compared with therapeutic ultrasound. Methods: The study included 55 patients with diagnose of heel spur syndrome. Patients were divided into three groups according to undergoing therapy. Group A (n = 20) received 6 applications of radial shock wave, group B (n = 20) obtained 3 applications of focused shock wave and group C received 8 applications of therapeutic ultrasound. Intensity and character of the pain were assessed before and after therapeutic intervention using non-standardized questionnaire. For the assessment and description of the results were used standard statistical indicators and methods. Results: Radial and focused shockwave therapy had according to the obtained results in the selected treatment protocol positive effect on the clinical course of the disease and was markedly more effective than therapeutic ultrasound. Almost all parameters reached the highest percentage improvement in the group treated with 6 applications of radial shock waves. There were no complications and side effects during the experiment. Keywords: heel spur, plantar fasciitis,...
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ESWT in Achilles tendinopathy
Hojková, Lýdie ; Demeková, Júlia (advisor) ; Havlíčková, Michaela (referee)
Achilles tendinopathy is a painful condition formed by chronic overuse. Conservative treatement requires activity modification, heel lifts, arch supports, even immobilisation. There are often unsatisfactory results with it. The use of ESWT has recently been introduced in soft-tissue disorders including epicondylitis, plantar fasciitis, calcifitation of the shloulder and, as well, Achilles tendinopathy. The aim of the work was to introduce the effects of ESWT on soft tissues, types of generation and new posibilities in ESWT therapy in Achilles tendinopathy.
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Specifications of the Ansys Fluent Solution Solver for low pressures in EREM
Šimík, Marcel ; Bílek, Michal (referee) ; Maxa, Jiří (advisor)
This thesis is focused on electron microscopy which issue is discussed at the beginning of work. The main attention is dedicated to the Environmental electron microscope, especially the differentially pumped chamber, which the thesis deals with. There is a production of an experimental chamber for analysis of shock waves on going therefore main goal of this thesis was to analyze the flow pattern in this chamber. Using the Ansys Fluent program, simulations of the characteristic flow that arises from the pumping of the vacuum chambers namely the ultrasonic flow at low pressures on which the most suitable turbulent module was applied as well as the degree of discretization was performed. The final analysis of this flow pattern is primarily focused on the localization of the shock wave which experimental evidence is to be lodged by shadow optical method as a part of the new concept of the chamber. The basis for the simulation of the chamber was taken over by Dr. Danilatos, with which the results were compared.
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