Článek představuje technologii LOCA, která byla vybudována v Centru výzkumu Řež s.r.o. (CVŘ) v rámci projektu SUSEN. Teoretický popis havárií jaderných elektráren umožňuje vysvětlit smysl testování a způsoby využití nové technologie LOCA jako nástroje při vývoji nových a spolehlivějších zařízení., Martin Březina, Michaela Rabochová, Roman Mohyla., and Obsahuje bibliografické odkazy
The paper introduces a method for fabrication of microscopic cathode based on Schottky field emission. Schottky emission is the predominant electron source technology in actual focused electron beam equipment, including scanning electron microscopy (SeM), (TeM) transmission electron microscopy, auger systems, and semiconductor inspection tools. achieving proper results requires an electron source with the following ideal properties: small source size, low electron emission energy spread, high brightness (beam current per solid angle), low noise and long-term stability, simple and low-cost operation. recently new technical modifications have been made in order to improve current fabrication methods. Widely used ''drop off'' method was further improved in order to allow reproducible tip fabrication with ultra sharp tips which radius reaches tens of nanometres. and Příspěvek se zabývá metodou automatizované výroby Schottkyho katod pro potřeby elektronové mikroskopie. Mezi jednotlivými elektronovými zdroji začínají v poslední době převládat právě katody založené na principu Schottkyho emise. Především se jedná o SEM (rastrovací elektronovou mikroskopii), TEM (transmisní elektronovou mikroskopii), Augerovy systémy a o systémy pro diagnostiku v polovodičovém průmyslu. Nároky na parametry přístrojů stále narůstají, z čehož přirozeně vyplývá i potřeba kvalitního elektronového zdroje o malé velikosti, nízké energii rozptýlených elektronů, vysoké svítivosti, s nízkým šumem, dlouhodobě teplotně stabilního a především s nízkými provozními náklady. Dosud byly za účelem zlepšení spolehlivosti přípravy implementovány mnohé technické modifikace související s výrobou a úpravou hrotů katod. Široce používané elektrochemické leptání metodou „drop off“ bylo dále zdokonaleno, aby umožnilo reprodukovatelnou výrobu hrotů o poloměru v řádech desítek nm.
The broader Corinth Gulf region is characterized by a notable active tectonic regime, associated with multiple active fault zones. The continuous N–S extensional tectonics of the area is responsible for the roughly E–W trending active normal fault zones, while individual fault segments are associated with seismic events. Satellite geodesy is a qualitative and quantitative means of estimating the tectonically active setting, based on the recorded motions. The study area is monitored by 14 permanent GPS/GNSS stations, collecting primary geodetic data for a 7-year time period (2008-2014). A 30-sec observation rate was performed, resulting in the extraction of the GPS/GNSS velocity values. The primary geodetic data were processed by applying the triangulation methodology, based on the combination of three different GPS/GNSS stations data, which were considered as the triangle vertices. Triangulation methodology led to the construction of 26 different triangles, while for each of them a series of parameters was determined. In particular, the extracted parameters are: a) Maximum Horizontal Extension, b) Total Velocity, c) Maximum Shear Strain and d) Area Strain. The extracted results are expected to approach, qualitatively and quantitatively, the interpretation of the tectonic regime, as well as to determine new, seismic-related, tectonic features.
The Hronov-Poříčí Trough represents the easternmost part of the Trutnov-Náchod Depression. The NW-SE striking structure was formed due to the post-Cretaceous flexural folding and is filled with the Upper Cretaceous sediments. Both the NE and SW margins of the trough are bounded by flexures with the Upper Cretaceous strata dipping 40-60° towards the axis of the trough. The NE flexure is situated close to the parallel Hronov-Poříčí Fault Zone. Up to now, it is not fully known, in what extent the normal faulting was involved in the evolution of the structure. From the geomorphological point of view, the normal fault constraints of the trough seem to be acceptable, as the surface topography of its present margins exhibit many signs typical for fault scarps. However, the existence of a fault system bounding all round the Hronov-Poříčí Trough has not b een proved by any geological research. Hence the geophysical research was carried out on both sides of the NW part of the trough to support one of these hypothesis. Five geoelectrical profiles were measured in the area and the fault system was proved on the NE side of the trough. On the SW boundary the fault system was not found. Thus it seems, that the NE boundary is controlled by fault tectonics, whereas the SW boundary is rather formed by a simple flexure., Jan Valenta, Vladimír Stejskal and Petra Štěpančíková., and Obsahuje bibliografické odkazy