Interindividuality ECG Analysis in Population

Import 05/08/2014Práce se zaměřuje na hodnocení interindividuality fyziologických záznamů pacientských EKG z Frankova svodového systému. Dále se věnuje úpravě, zpracování a následnému vzájemnému hodnocení záznamů z jednotlivých svodů. Jedním z důležitých bodů práce pak je výpočet a zpracování vektorkardiografických záznamů v jednotlivých vektorkardiografických rovinách.This thesis focuses on the evaluation of physiological records interindividuality by the patient's ECG acquired by the Frank's leads. It also discusses the treatment, processing and successive review of records captured from individual leads. One of the important point of this work is the calculation and processing of individual vectorcardiographical records at each vectorcardiographical spaces.450 - Katedra kybernetiky a biomedicínského inženýrstvívýborn

Semi-automatic meteoroid fragmentation modeling using genetic algorithms

Meteoroids are pieces of asteroids and comets. They serve as unique probes to the physical and chemical properties of their parent bodies. We can derive some of these properties when meteoroids collide with the atmosphere of Earth and become a meteor or a bolide. Even more information can be obtained when meteoroids are mechanically strong and slow enough to drop meteorites. Through physical modeling of bright meteors, we describe their fragmentation in the atmosphere. We also derive their mechanical strength and the mass distribution of the fragments, some of which may hit the ground as meteorites. We developed a semi-automatic program for meteoroid fragmentation modeling using parallel genetic algorithms. This allowed us to determine the most probable fragmentation cascade of the meteoroid, and also to specify its initial mass and velocity. These parameters can be used in turn to derive the heliocentric orbit of the meteoroid and to place constraints on its likely age as a separate object. The program offers plausible solutions for the majority of fireballs we tested, and the quality of the solutions is comparable to that of manual solutions. The two solutions are not the same in detail, but the derived quantities, such as the fragment masses of the larger fragments and the proxy for their mechanical strength, are very similar. With this method, we would like to describe the mechanical properties and structure of both meteoroids belonging to major meteor showers and those that cause exceptional fireballs.Comment: Accepted for publication in A&A, 17 pages, 27 figure

Photographic Observations of the Hayabusa Re-entry

We analyzed photographic observations of the re-entry of the Hayabusa spacecraft and capsule over Southern Australia on June 13, 2010, 13:52 UT. Radiometric measurements of the brightness of the associated fireball were obtained as well. We derived the trajectories and velocities of the spacecraft, its four fragments and the capsule. The capsule trajectory was within a few hundred meters of the trajectory predicted by JAXA prior the re-entry. The spacecraft trajectory was about 1 km higher than the capsule trajectory. Two major fragments separated from the spacecraft at a height of about 62 km with mutual lateral velocity of 250 m/s. The maximum absolute magnitude of the fireball of -12.6 was reached at a height of 67 km. The dynamic pressures acting on the spacecraft at the fragmentation points were only 1 - 50 kPa. No spacecraft fragment was seen to survive below the height of 47 km. The integral luminous efficiency of the event was 1.3%. As expected, the capsule had a very low luminous efficiency and very low ablation coefficient. The ablation coefficients and masses of the major spacecraft fragments are discussed.Comment: Accepted for publication in PASJ, 16 pages, 8 figures, 5 table

Návrh satelitního městečka pro výstavbu 20ti rodinných domků

Import 20/04/2006Prezenční výpůjčkaVŠB - Technická univerzita Ostrava. Fakulta stavební. Katedra (222) městského stavitelstv