http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Development of a Fully-Coupled, All States, All Hazards Level 2 PSA at Leibstadt Nuclear Power Plant
Pavol Zvoncek,Olivier Nusbaumer,Alfred Torri 한국원자력학회 2017 Nuclear Engineering and Technology Vol.49 No.2
This paper describes the development process, the innovative techniques used and insightsgained from the latest integrated, full scope, multistate Level 2 PSA analysis conductedat the Leibstadt Nuclear Power Plant (KKL), Switzerland. KKL is a modern single-unitGeneral Electric Boiling Water Reactor (BWR/6) with Mark III Containment, and a poweroutput of 3600MWth/1200MWe, the highest among the five operating reactors inSwitzerland. A Level 2 Probabilistic Safety Assessment (PSA) analyses accident phenomena in nuclearpower plants, identifies ways in which radioactive releases from plants can occur andestimates release pathways, magnitude and frequency. This paper attempts to give anoverview of the advanced modeling techniques that have been developed and implementedfor the recent KKL Level 2 PSA update, with the aim of systematizing the analysisand modeling processes, as well as complying with the relatively prescriptive Swiss requirementsfor PSA. The analysis provides significant insights into the absolute and relative importances ofrisk contributors and accident prevention and mitigation measures. Thanks to severalnewly developed techniques and an integrated approach, the KKL Level 2 PSA report exhibitsa high degree of reviewability and maintainability, and transparently highlights themost important risk contributors to Large Early Release Frequency (LERF) with respect toinitiating events, components, operator actions or seismic component failure probabilities(fragilities).
Pavol Bauer,Viliam Fedak 전력전자학회 2010 JOURNAL OF POWER ELECTRONICS Vol.10 No.6
The paper reports about methodology at design of interactive e-learning modules that are suitable both for teaching and learning. They cover special topics of electrical engineering, starting from the fundamentals, through electrical machines, power electronics to the fields of controlled electromechanical energy conversion, like electrical drives, complex drive systems, application of drives, mechatronic systems, telemanipulation, and robotics. In the paper, the emphasis is devoted in detail to philosophy and realization of the modules from fields of Power Electronics and Electrical Drives. On several examples there are explained main principles and specialties at their development.
Mikula, Pavol,Vrá,na, Miroslav,Pilch, Jan,Seok Seong, Baek,Woo, Wanchuck,Em, Vyacheslav International Union of Crystallography 2014 Journal of applied crystallography Vol.47 No.2
<P>The neutron diffraction properties of a double-crystal (+<I>n</I>,−<I>m</I>) setting, which contains a bent perfect Si(311) crystal in the fully asymmetric diffraction (FAD) geometry with output beam expansion and a bent perfect Si(220) crystal in the symmetric diffraction geometry, are presented. Generally, there are two possibilities for the FAD geometry: either with output beam compression or with output beam expansion. In this case, attention has been focused on the latter. The properties of the (+<I>n</I>,−<I>m</I>) double-bent-crystal arrangement of a bent perfect crystal FAD Si(311) geometry, in combination with a bent Si(220) crystal slab in the symmetric diffraction geometry, were studied. It was found that, after beam expansion, this FAD geometry can provide a monochromatic beam of rather large cross section but very small divergence.</P>
Mikula, Pavol,Vrá,na, Miroslav,Š,aroun, Jan,Davydov, Vadim,Em, Vyacheslav,Seong, Baek‐,Seok International Union of Crystallography 2012 Journal of applied crystallography Vol.45 No.1
<P>Multiple Bragg reflections (MBRs), which can be realized in a bent perfect crystal (BPC) slab and are mutually in dispersive diffraction geometry, provide a monochromatic beam of excellent resolution. After identifying many MBR effects in a BPC Si crystal by using the method of θ–2θ<SUB>D</SUB> scanning, we have turned our attention to the study of selected effects using the method of azimuthal rotation of the crystal lattice around the scattering vector of the primary reflection for a fixed chosen wavelength. In this paper, several azimuthal scans with the intention of possible practical exploitation for very high resolution diffractometry are presented.</P>
Bauer, Pavol,Fedak, Viliam The Korean Institute of Power Electronics 2010 JOURNAL OF POWER ELECTRONICS Vol.10 No.6
The paper reports about methodology at design of interactive e-learning modules that are suitable both for teaching and learning. They cover special topics of electrical engineering, starting from the fundamentals, through electrical machines, power electronics to the fields of controlled electromechanical energy conversion, like electrical drives, complex drive systems, application of drives, mechatronic systems, telemanipulation, and robotics. In the paper, the emphasis is devoted in detail to philosophy and realization of the modules from fields of Power Electronics and Electrical Drives. On several examples there are explained main principles and specialties at their development.
Reactive oxygen species and antioxidant defense in human gastrointestinal diseases
Peter Patlevič,Janka Vašková,Pavol Švorc Jr,Ladislav Vaško,Pavol Švorc 한국한의학연구원 2016 Integrative Medicine Research Vol.5 No.4
Crohn's disease and ulcerative colitis, known together as inflammatory bowel diseases (IBDs), and celiac disease are the most common disorders affecting not only adults but also children. Both IBDs and celiac disease are associated with oxidative stress, which may play a significant role in their etiologies. Reactive oxygen species (ROS) such as superoxide radicals (O2), hydroxyl radicals ( OH), hydrogen peroxide (H2O2), and singlet oxygen (1O2) are responsible for cell death via oxidation of DNA, proteins, lipids, and almost any other cellular constituent. To protect biological systems from free radical toxicity, several cellular antioxidant defense mechanisms exist to regulate the production of ROS, including enzymatic and nonenzymatic pathways. Superoxide dismutase catalyzes the dismutation of O2 to H2O2 and oxygen. The glutathione redox cycle involves two enzymes: glutathione peroxidase, which uses glutathione to reduce organic peroxides and H2O2; and glutathione reductase, which reduces the oxidized form of glutathione with concomitant oxidation of nicotinamide adenine dinucleotide phosphate. In addition to this cycle, GSH can react directly with free radicals. Studies into the effects of free radicals and antioxidant status in patients with IBDs and celiac disease are scarce, especially in pediatric patients. It is therefore very necessary to conduct additional research studies to confirm previous data about ROS status and antioxidant activities in patients with IBDs and celiac disease, especially in children.
Buckling of single-walled carbon nanotubes with and without defects
Jozef Bocko,Pavol Lengvarský 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.4
This paper studies the buckling behavior of simply-simply supported Single-walled Carbon nanotubes (SWCNTs) with and without defects. The buckling of carbon nanotubes without defects was investigated using the Finite element method (FEM) and analytical treatment and that of carbon nanotubes with defects was studied only by FEM. The carbon nanotubes were modeled as beams and shells. Computations showed that beam elements in the given form provided varying results as shells in their numerical or analytical manner for a small aspect ratio. The defects resulted from the removal of randomly determined carbon atoms and beam elements connected to the nodes. The increasing number of defects decreased the critical buckling force of SWCNTs. The decrease in the critical buckling force was almost the same for SWCNTs with the same diameter but with different chirality.
Distance Education in Soft-Switching Inverters
Dan Lascu,Pavol Bauer,Mircea B?b?it¸?,Mihaela Lascu,Viorel Popescu,Adrian Popovici,Dan Negoi?escu 전력전자학회 2010 JOURNAL OF POWER ELECTRONICS Vol.10 No.6
The paper describes aspects regarding an E-learning approach of resonant ac inverters. The learning process is based on “Learning by Doing” paradigm supported by several learning tools: electronic course materials, interactive simulation, laboratory plants and real experiments accessed by Web Publishing Tools under LabVIEW. Built on LabVIEW and accompanied by a robust, flexible and versatile hardware, the experiment allows a comprehensive study by remote controlling and performing real measurements on the inverters. The study is offered in a gradual manner, according to the Leonardo da Vinci project EDIPE (E-learning Distance Interactive Practical Education) philosophy: theoretical aspects followed by simulations, while in the end the real experiments are investigated. Studying and experimenting access is opened for 24 hours a day, 7 days a week under the Moodle booking system.