72 research outputs found

    Cambrian and Ordovician Fossil-Lagerstätten in the Barrandian area

    Get PDF
    Exceptionally preserved fossils showing typical characters of the so called Konservat-Lagerstätten are shortly mentioned from Cambrian and Ordovician sediments of the Barrandian area. Fossils with well preserved soft parts were ascertained in several different levels of two Cambrian units of the Příbram-Jince Basin as well as in diverse levels of the Skryje-Týřovice Basin. Other exceptionally preserved fossils are shortly discussed from numerous Lower to Upper Ordovician levels of the Prague Basin

    REFLECT – Research flight of EURADOS and CRREAT: Intercomparison of various radiation dosimeters onboard aircraft

    Get PDF
    Aircraft crew are one of the groups of radiation workers which receive the highest annual exposure to ionizing radiation. Validation of computer codes used routinely for calculation of the exposure due to cosmic radiation and the observation of nonpredictable changes in the level of the exposure due to solar energetic particles, requires continuous measurements onboard aircraft. Appropriate calibration of suitable instruments is crucial, however, for the very complex atmospheric radiation field there is no single reference field covering all particles and energies involved. Further intercomparisons of measurements of different instruments under real flight conditions are therefore indispensable. In November 2017, the REFLECT (REsearch FLight of EURADOS and CRREAT) was carried out. With a payload comprising more than 20 different instruments, REFLECT represents the largest campaign of this type ever performed. The instruments flown included those already proven for routine dosimetry onboard aircraft such as the Liulin Si-diode spectrometer and tissue equivalent proportional counters, as well as newly developed detectors and instruments with the potential to be used for onboard aircraft measurements in the future. This flight enabled acquisition of dosimetric data under well-defined conditions onboard aircraft and comparison of new instruments with those routinely used. As expected, dosimeters routinely used for onboard aircraft dosimetry and for verification of calculated doses such as a tissue equivalent proportional counter or a silicon detector device like Liulin agreed reasonable with each other as well as with model calculations. Conventional neutron rem counters underestimated neutron ambient dose equivalent, while extended-range neutron rem counters provided results comparable to routinely used instruments. Although the responses of some instruments, not primarily intended for the use in a very complex mixed radiation field such as onboard aircraft, were as somehow expected to be different, the verification of their suitability was one of the objectives of the REFLECT. This campaign comprised a single short flight. For further testing of instruments, additional flights as well as comparison at appropriate reference fields are envisaged. The REFLECT provided valuable experience and feedback for validation of calculated aviation doses

    Theoretical predictions of frequence of complex DNA damages induced by ionizing radiation

    No full text
    Yields of simple and complex DNA damages induced by ionizing radiation with different LET (0.4-160 keV/um) were predicted by theoretical modeling

    DDS function generator

    No full text
    Tato diplomová práce se zabývá v teoretické části problematikou oscilátorů a různými možnostmi generování signálu. Práce se věnuje komplexnímu návrhu generátoru na principu přímé digitální syntézy, návrhu rekonstrukčního filtru a digitálnímu ovládání amplitudy. Taktéž stručně shrnuje vlastnosti mikrokontroléru a lineárních napájecích zdrojů. Náplní praktické části je autorská realizace funkčního generátoru a detailní popis jeho konstrukce, taktéž jsou zde shrnuty některé části ovládacího softwaru.Theoretical part of this diploma thesis is based on different types of harmonic oscillator. This thesis deals with complex design of function generator based on direct digital synthesis, proposal of reconstruction filter and digitally controlled of amplitude. Futhermore, simply describes microcontroller and linear power supply. As concerns the practical part, author introduces his own function generator project and the way it has been designed

    simple bridge on elastic foundation2

    No full text
    Import 14/12/2006Prezenční337 - Katedra mechanik

    Torsion test of steel specimens

    No full text
    Import 23/07/2008Prezenční339 - Katedra pružnosti a pevnostiNeuveden

    The level of knowledge and skills of general practitioners in the provision of cardiopulmonary resuscitation

    No full text
    Bakalářská práce je zaměřena na problematiku praktických lékařů při poskytování kardiopulmonální resuscitace. Teoretická část popisuje všeobecné praktické lékařství jako obor, stavy se kterými se praktičtí lékaři nejčastěji setkávají a popisuje doporučené vybavení jejich ordinací pro stavy spojené s náhlou zástavou oběhu a s nutností provádět kardiopulmonální resuscitaci. Teoretická část bakalářské práce se v neposlední řadě zaměřuje na základní a rozšířenou neodkladnou resuscitaci v souvislosti s doporučením Evropské rady pro resuscitaci vydaným v roce 2010. Výzkumná část interpretuje výsledky výzkumného šetření, které probíhalo formou dotazníkového šetření. Cílem tohoto výzkumu je zhodnotit a porovnat informace o edukaci praktických lékařů v problematice rozšířené neodkladné resuscitace dospělých dle nových doporučení Evropské rady pro resuscitaci 2010 a zmapovat vybavenost ordinací praktických lékařů pomůckami a léky pro neodkladnou resuscitaci.The thesis is focused on the issue of general practitioners in the CPR. The theoretical part describes general practice as a discipline, the states with which practitioners often encounter and describes the best equipment for their offices conditions associated with sudden cardiac arrest and the need to perform cardiopulmonary resuscitation. The theoretical part of the thesis, not least focuses on basic and advanced resuscitation in the context of the recommendations of the European Resuscitation Council issued in 2010. The research part interprets the results of an investigation which was carried out by questionnaire. The aim of this research is to evaluate and compare the information to educate practitioners in the issue of extended resuscitation of adults according to the new recommendations of the European Resuscitation Council 2010 and map skills GPs' surgeries tools and drugs for resuscitation.Katedra ošetřovatelstvíHodnocení vedoucího: velmi dobře Hodnocení oponenta: velmi dobře Doplňující otázky k obhajobě: 1. Existují doporučené postupy pro obvodní lékaře (podobně jako třeba kardiologové, chirurgové a apod.)? Kde je můžete najít? 2. V závěru píšete, že by bylo dobré navrhnout určitou formou školení. Jak byste si to představoval vy? 3. V jaké četnosti uvádíte své grafy

    Theoretical predictions of influence of oxygen concentration on the yields of DNA damage caused by ionizing radiation

    No full text
    Influence of oxygen concentration on the primary radiation damage of DNA caused by charged particles (electrons, protons, alpha particles) has been studied using the theoretical model RADAMOL
    corecore