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Effect of volcanic ash to Air Transport
Soukop, Robin ; Šplíchal, Miroslav (referee) ; Chlebek, Jiří (advisor)
This master's thesis deals with the issue of volcanic ash as a complex and its impact on aviation, including the volcanic activity itself (conditions for its existence, for existence of eruptions and their basic products). In addition, the thesis also deals with effect of volcanic ash on aircraft and airports, possibilities of its detection or monitoring as well as mechanism of its spreading in airspace. The emphasis is laid mainly on air incidents related to volcanic ash and on danger it poses to the airspace of the Czech Republic.
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Influence of clear air turbulence and vocanic ash on the air traffic
Puchar, Vladimír ; Hudec,, František (referee) ; Krška, Karel (advisor)
Bachelor thesis handles issues related to turbulence in cloudless space and the influence of volcanic ash on air traffic. It contains basic information and knowledge to pilot airliners. Topic turbulence in cloudless space CAT is conceived more in terms ofweather, they include general information about the accompanying phenomena. The chapter on volcanic ash are also included chapters on understanding the issues thatare not directly related to the hazard to air traffic.
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Multi-wavelength study of white-light flares
Mravcová, Lucia ; Švanda, Michal (advisor) ; Zemanová, Alena (referee)
Solar flares are common and strong demonstrations of solar activity. They are observable throughout the whole electromagnetic spectrum. If they show a broadband emission in the visible continuum, then we speak of white-light flares. The origin of white-light flares is not fully understood. We detected 24 white-light flares in SDO/HMI data and analyzed them using SDO/AIA wavelength bands at 1 700 ̊A and 304 ̊A and GONG Hα observations. According to our work, the emission in the 1 700 ̊A band is similar to the white-light emission but usually starts sooner. The positions of intensity enhancements in the 1 700 ̊A band are similar to the positions of the white-light flares and are connected by ribbons visible in the 304 ̊A band and in the Hα line. Then we studied the decay time of white-light flares and found that for most of the white-light flare points the typical decay time ranges in 2 - 3 min. 1
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Solar Flares from Optical to X-ray Emission
Nejedlý, Jaroslav ; Kašparová, Jana (advisor) ; Řípa, Jakub (referee)
Solar flare is a phenomenon during which a large amount of energy is released in various forms. Part of this energy is released in form of different electromagnetic radiation. By analysing hard X-ray spectra of such emission it is possible to derive various parameters of a flare. Thanks to accurate images of solar atmosphere in comparatively high resolution, it is possible to analyse spatial structure of solar flares. By combining data from RHESSI, SDO, GOES, and ground-based observatories, it is feasible to gain an overview of various aspects of solar flares. Combination of multiple different observations of same event will allow us to compare obtained results. The result of this thesis is an analysis of spectra and spatial structures of two selected flares and derivation of their parameters. 1
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Multi-wavelength study of white-light flares
Mravcová, Lucia ; Švanda, Michal (advisor) ; Zemanová, Alena (referee)
Solar flares are common and strong demonstrations of solar activity. They are observable throughout the whole electromagnetic spectrum. If they show a broadband emission in the visible continuum, then we speak of white-light flares. The origin of white-light flares is not fully understood. We detected 24 white-light flares in SDO/HMI data and analyzed them using SDO/AIA wavelength bands at 1 700 ̊A and 304 ̊A and GONG Hα observations. According to our work, the emission in the 1 700 ̊A band is similar to the white-light emission but usually starts sooner. The positions of intensity enhancements in the 1 700 ̊A band are similar to the positions of the white-light flares and are connected by ribbons visible in the 304 ̊A band and in the Hα line. Then we studied the decay time of white-light flares and found that for most of the white-light flare points the typical decay time ranges in 2 - 3 min. 1
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Study of white-light flares
Mravcová, Lucia ; Švanda, Michal (advisor) ; Heinzel, Petr (referee)
Solar flares are a relatively common and strong demonstration of the solar ac- tivity and are observable throughout the whole electromagnetic spectrum. Some- times, solar flares are also accompanied with an emission in white-light contin- uum, then we speak of white-light flares. The origin of white-light flares is not entirely understood up to this day. The detection of white-light flares can be difficult, therefore we developed a program for automatic detection of white-light flares in SDO/HMI observations. After that, we studied properties of the detected white-light flares. Our work implies that there are two types of white-light flares depending on an X-ray flux of a solar flare. The difference between these two groups can be caused by a different behaviour of the magnetic field in the neigh- bourhood of the detected white-light flares. Our discovery could help in a better understanding of the origin of white-light flares. 1
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Age estimation based on human dentice
Černá, Magdaléna ; Velemínská, Jana (advisor) ; Brůžek, Jaroslav (referee)
Age estimation plays a very important role not only in forensic and biomedicinal anthropology, but also in other disciplines, such as bioarcheologie or paleoanthropology. Teeth are considered the most reliable age indicators during childhood and adolescence. Teeth are resistant to the effects of external and internal factors, and because of that they decay a long time after a death of an individual. While age estimation in children and adolescents can be based on mineralization or eruption of the teeth, in adults it is focused on retrogressive changes in dentition. There have been established several methods and their modification for age assessment based on these criteria. This thesis aims to generally summarize tthe principles and methods of age estimation based on dentition both in immature and adult individuals.
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Late Minoan Settlements Abandoned or Destroyed after the Eruption of Santorini Volcano.
Pavlacký, Matěj ; Bouzek, Jan (advisor) ; Musil, Jiří (referee)
This thesis examines Late Minoan Settlements in Crete that were destroyed or abandoned due to the consequences of the Santorini volcano eruption. A summary of geological history of Crete, Thera and the surrounding area is given in the first part. The next chapter sums up the research in the fields of relative and mainly absolute chronology, of which scientists have not yet been able to provide a convincing calendar date for the eruption of the volcano nor a possible fixed absolute chronology of the general Later Bronze Age not only in the Aegean. The development of the Santorini Volcano eruption in the Late Minoan IA period (LM IA) is described. According to the research, this eruption must have caused earthquakes and tsunamis. The possible impact on the near island of Crete, its inhabitants and settlements, mainly in the coastal area of north-northeast part of the island, is also discussed.
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Pinatubo, climate change after the eruption of the volcano.
Pavlásková, Šárka ; Soukupová, Jana (advisor) ; Vokoun, Martin (referee)
The work is focused on climate change following the eruption of a Philippine volcano Pinatubo. The volcano erupted on June 17, 1991. Into the air was given 20 to 30 million tons of sulfur dioxide. The Large amounts of volcanic dust has caused shading of sunlight, resulting in a global cooling of about 0,5 ° C. In this work is executed an analysis of foreign temperature series and also was compared to observations at meteorological stations in the Czech republic.
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Effect of volcanic ash to Air Transport
Soukop, Robin ; Šplíchal, Miroslav (referee) ; Chlebek, Jiří (advisor)
This master's thesis deals with the issue of volcanic ash as a complex and its impact on aviation, including the volcanic activity itself (conditions for its existence, for existence of eruptions and their basic products). In addition, the thesis also deals with effect of volcanic ash on aircraft and airports, possibilities of its detection or monitoring as well as mechanism of its spreading in airspace. The emphasis is laid mainly on air incidents related to volcanic ash and on danger it poses to the airspace of the Czech Republic.
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