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Optimization of modal properties of the body in the air flow
Matějka, Jan ; Švancara, Pavel (referee) ; Skalka, Petr (advisor)
The bachelor thesis deals with dynamic analysis of the rod body, which is excited by the Karmán vortices. In this thesis a method of countermeasure is also verified, which could be possibly used in order to supress the state of resonance in the body and which could minimalize the influence of the Karmán vortices on the structure. This method consists in change of the mass in specific parts of the body in order to change modal properties of this body. The main goal of the thesis is to find suitable configurations of the mass distribution depending on air flow velocity for purpose of minimalization the influence of the Karmán vortices on the construction. This is achieved by optimization of modal properties. The optimization is based on results of harmonic analysis and is considering possibility of practical use.
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Technická a ekonomická komparace automobilu s elektrickým a spalovacím motorem
MATĚJKA, Jan
This master thesis is focused on the comparison of electric drive and drive with an internal combustion engine. The literary overview shows the history and beginnings of the first attempts to create a vehicle with an electric energy. This all goes back to the half of 19th century. In this thesis are also included types of electric engines which are used in drives. Great attention is focused on the several types of accumulators and their charging. The last chapter in the theoretical part is dedicated to the ecological aspect of commission and the production of electric energy which is used to the drive of the electric car. The second, practical, part deals with two levels. Concretely with the technical part where are compared the on-road performance, comfort, noise and functionality of the BMW i3 and Renault Clio. Another economical part which is focused mainly on the operating costs and the affordability of vehicles which were tested.
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Contrast-induced acute kidney injury in high risk patients undergoing invasive cardiac procedures
Matějka, Jan ; Vojáček, Jan (advisor) ; Gregor, Pavel (referee) ; Červinka, Pavel (referee)
Contrast-induced acute kidney injury in high risk patients undergoing invasive cardiac procedures Introduction: Acute renal function impairment associated with radiologic procedures, known as contrast-induced acute kidney injury (CI-AKI), is strongly associated with a higher rate of morbidity, in-hospital mortality and diminished long-term survival. CI-AKI prevention focuses mainly on adequate periprocedural hydratation and use of a low amount of contrast media. Previous trials concerning use of adenosine antagonist theophylline revealed contradictory results. Goals: Our interventional trial sought to evaluate the effect of theophylline in CI-AKI prevention in well hydrated elderly patients with chronic kidney disease. Our cross-sectional study focused on CI-AKI in patients undergoing primary PCI for ST segment elevation myocardial infarction (STEMI). Methods: Interventional trial: randomized, double-blind, placebo-controlled trial was performed. 56 patients with estimated glomerular filtration rate bellow 60 60 ml/min/1.73m2 referred for cardiac coronary angiography and/or angioplasty were enrolled. 31 of them were randomly assigned to 200 mg theophylline IV before procedure, and 25 to placebo. Iso- osmolar contrast Iodixanol was used. Trial protocol included mandatory parenteral hydration. The...
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Working Time and Rest Periods Guidelines
Štefko, Martin ; Matejka, Ján ; Feigerlová, Monika ; Pichrt, J.
The Guidelines deal with issues pertaining to the working hours and rest periods, summing up all relevant data and applying them to the topic at hand. The guidelines are aimed at increasing the efficiency of education and training of Labour Inspection State Office (SUIP) inspectors and regional inspection offices (OIP), and at providing assistance in the execution of their control-related activities.
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Determination of the efficiency of solar collectors covered makrolon plates.
MATĚJKA, Jan
This thesis deals with the alternative cover of the liquid solar collector. It describes the structure of the solar collector itself and the influence of various parameters that directly affect its effectiveness. It analyses technical - economic possibilities of the usual type of the glazing and compares them with possibilities to cover the collector with the makrolon plates. The aim is to perform a theoretical evaluation to find out whether the referenced type of covers, due to its characteristics, could be used. In conclusion the evaluation of values and possibilities of its practical use are shown.
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Privacy Protection and the Right to Be Forgotten
Matejka, Ján
Definition of the term “privacy” and the view of privacy from historical perspective; problems with the determination of the right to privacy. A new European system of privacy protection and a draft regulation on the protection of individuals introduced by the EU in January 2012.
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Recyklační programy
DeWaRec, s.r.o., Praha ; CEMC - České ekologické manažerské centrum, Praha ; Vysoké učení technické, Fakulta podnikatelská, Brno ; Výzkumný ústav vodohospodářský T.G.Masaryka, Praha ; SLEEKO, Praha ; ENZO, Praha ; ECO trend, s.r.o., Praha ; Beneš, David ; Jirkovská, Veronika ; Hrabina, David ; Jurová, Marie ; Vejnar, Pavel ; Havránková, Věra ; Černík, Bohumil ; Kotoulová, Zdenka ; Matějka, Jan ; Záveský, Marek ; Durdil, Josef
Souhrnná zpráva o výsledcích projektu v roce 2004: v roce 2004 byl zpracován návrh zásad designu pro recyklaci - popis životního cyklu vybraných komodit. Byl proveden sběr dat pro hodnocení recyklačních programů dle stanovené metodiky, navržen systém sledování informací o toku odpadů u vybraných komodit, dále byly navrženy optimální recyklační programy, naplňována databáze recyklačních technologií, provedeny prognózy vývoje vybraných komodit (elektrická a elektronická zařízení, textilní podlahové krytiny). Byly hodnoceny charakteristiky materiálových a ekonomických toků u vybrané komodity (automobil).
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Recyklační programy
DeWaRec, s.r.o., Praha ; CEMC - České ekologické manažerské centrum, Praha ; Vysoké učení technické, Fakulta podnikatelská, Brno ; Výzkumný ústav vodohospodářský T.G.Masaryka, Praha ; SLEEKO, Praha ; ENZO, Praha ; ECO trend, s.r.o., Praha ; Hrabina, David ; Kotoulová, Zdenka ; Matějka, Jan ; Záveský, Marek ; Durdil, Josef
Přílohová část B obsahuje: Příloha 4: Optimální recyklační program komodity pneumatiky. Příloha 5: Prognózy trendů vývoje vybraných komodit (elektrická a elektronická zařízení, textilní podlahové krytiny, koberce).
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