No (257)
Number of found documents:
257
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to
Time-spatial changes of the regional and landscapes structures. Collection of Abstracts
Kallabová, Eva; Ira, V.
2009 - English
Collection of abstracts – urban, regional, environmental geography, geography of transport and settlements. Regional location – Czech Republic, Slovakia, Romania, Poland. Sborník abstraktů s tématikou urbánní, regionální, environmentální, dopravní a sídelní geografie, regionálně zaměřené na ČR, SR, Rumunsko, Polsko.
Keywords:
geography; regional structures; landscape
Available at various institutes of the ASCR
Time-spatial changes of the regional and landscapes structures. Collection of Abstracts
Collection of abstracts – urban, regional, environmental geography, geography of transport and settlements. Regional location – Czech Republic, Slovakia, Romania, Poland....
The windthrows in Šumava Mts caused by Kyrill hurricane and terrain features
Kolejka, Jaromír; Klimánek, M.; Mikita, T.; Svoboda, Jaroslav
2009 - English
Relationships between the windthrow origin and location on one hand and terrain features (slope, aspect, elevation,curvity etc.) on the other hand were geostatistically derived. While the impact of individual terrain features was statistically low, the complex terrain influence based in the terrain windthrow risk classes was statistically important. Relationships between the windthrow origin and location on one hand and terrain features (slope, aspect, elevation,curvity etc.) on the other hand were geostatistically derived. While the impact of individual terrain features was statistically low, the complex terrain influence based in the terrain windthrow risk classes was statistically important.
Keywords:
terrain; windthrows; GIS
Available at various institutes of the ASCR
The windthrows in Šumava Mts caused by Kyrill hurricane and terrain features
Relationships between the windthrow origin and location on one hand and terrain features (slope, aspect, elevation,curvity etc.) on the other hand were geostatistically derived. While the impact of ...
Ph. D. Workshop 2009 Proceedings
Blaheta, Radim; Kolcun, Alexej
2009 - English
These proceedings contain contributions presented at the fourth Ph.D. Workshop of the Institute of Geonics of the Academy of Sciences of the Czech Republic held in this year simultaneously in Ostrava and in Brno on November 19, 2009. Ph.D. training belongs among the most important activities not only of the universities but also of the institutes of the Academy of Sciences of the Czech Republic. Note that in total more than 2000 Ph.D. students are being trained at the institutes of the Czech Academy of Sciences. It guarantees that the knowledge and experience from the research will be forwarded and extended, which is of principal importance for the development of the research and the whole academic system. Sborník obsahuje příspěvky, které byly prezentovány na 4. workshopu doktorandů, který se konal na Ústavu geoniky AV ČR. V letošním roce se workshop konal paralelně na ústavu v Ostravě a na pobočce ústavu v Brně, která je sídlem oddělení environmentální geografie.
Keywords:
geotechnics; mathematical modelling; geology
Available at various institutes of the ASCR
Ph. D. Workshop 2009 Proceedings
These proceedings contain contributions presented at the fourth Ph.D. Workshop of the Institute of Geonics of the Academy of Sciences of the Czech Republic held in this year simultaneously in ...
The solution of problems with the pure Neumann boundary conditions on the outer boundary
Kohut, Roman
2009 - English
The pure Neumann boundary value problem is solvable only if all the applied external forces are balanced which means that the resultants of all forces and their moments vanish. The disturbance of the condition of balanced forces causes divergence of the used iterative method. For obtaining some numerical results we must seek generalized solution and modify the numerical techniques. Problém s čistými Neumannovými okrajovými podmínkami je řešitelný pouze v případě, kdy použité vnější síly jsou v rovnováze. To znamená, že výsledná síla a momenty jsou nulové. Porušení podmínek rovnováhy vede k divergenci použitých iteračních metod. Pro získání nějakých numerických výsledku musíme hledat zobecněné řešení a modifikovat numerické postupy.
Keywords:
pure Neumann boundary conditions; numerical techniques; iterative method
Available at various institutes of the ASCR
The solution of problems with the pure Neumann boundary conditions on the outer boundary
The pure Neumann boundary value problem is solvable only if all the applied external forces are balanced which means that the resultants of all forces and their moments vanish. The disturbance of the ...
Verification of Recent-Stress-Strain in Czech part of Upper Silesian Coal basin
Ptáček, Jiří; Grygar, R.; Koníček, Petr; Souček, Kamil; Staš, Lubomír; Waclawik, P.
2009 - English
A stresss strain model of Variscan structural tectonic pattern in the Czech part of Upper Silesian Coal Basin (USCB) based on paleostress analyse have been interpreted. It was compiled used many of tectonic measurements of planar and linear elements and their comparison with the knowledge of dynamic development of Variscan body in a larger framework of Moravo Silesian zone. It was took account the influence of Alpine deformation due to Carpathian nappe. There were more stress tensor gauging realised in the region above all using hydrofrac and treated overcoring methods during last ten years. It’s becoming apparent that for information of recent stress fields is usable the interpretation of focus mechanisms of energetic significant seismic events, which were observed here more than ten years. The aim of project is the verification of recent stress strain state in the easternmost region of Czech part of USCB.
Keywords:
coal geology; underground coal mining; stress strain model
Available at various institutes of the ASCR
Verification of Recent-Stress-Strain in Czech part of Upper Silesian Coal basin
A stresss strain model of Variscan structural tectonic pattern in the Czech part of Upper Silesian Coal Basin (USCB) based on paleostress analyse have been interpreted. It was compiled used many of ...
Occurrence of coal near Erigavo (Republic Somaliland)
Konečný, Pavel; Oliwkiewicz-Miklasinska, M.
2009 - English
The occurrence of Jurassic to Miocene coal in Republic Somaliland was described in literature. Some coal samples were collected in 2007 near Erigavo. On the base of palynological analysis the Jurassic age is suggested for examined coal. Content of ash of tested sample was 71,24% so that the sample is classified as a carbonaceous siltstone. The reflectance of huminite is RN = 0,33 %. Based on this data the next geological investigation was recommended. The occurrence of Jurassic to Miocene coal in Republic Somaliland was described in literature. Some coal samples were collected in 2007 near Erigavo. On the base of palynological analysis the Jurassic age is suggested for examined coal. Content of ash of tested sample was 71,24% so that the sample is classified as a carbonaceous siltstone. The reflectance of huminite is RN = 0,33 %. Based on this data the next geological investigation was recommended. V Republice Somaliland byly v literatuře popsány výskyty uhlí jurského až miocenního stáří. V roce 2007 byly poblíž města Erigavo odebrány vzorky uhlí. Stáří sloje odpovídá, podle výsledků palynologické analýzy, svrchní Juře. Analyzované uhlí, respektive uhelný prachovec obsahuje přes 70% popela, odraznost vitrinitu Rn je 0,33%. Na základě zjištěných dat byl doporučen další, podrobnější průzkum uhelných nalezišť v této zemi.
Keywords:
coal; geology; Republic Somaliland
Available at various institutes of the ASCR
Occurrence of coal near Erigavo (Republic Somaliland)
The occurrence of Jurassic to Miocene coal in Republic Somaliland was described in literature. Some coal samples were collected in 2007 near Erigavo. On the base of palynological analysis the Jurassic ...
SNA ´09 - Seminar on Numerical Analysis
Blaheta, Radim; Starý, Jiří
2009 - English
Seminar on Numerical Analysis 2009 (SNA’09) is the sixth meeting of a series of events started in Ostrava 2003 and devoted to numerical methods necessary for mathematical modelling of problems in sciences and engineering. In this respect, it was natural that in period 2005 - 2008 the SNA conferences became a part of the project MSTEP (http://www2.cs.cas.cz/mweb/) Modelling and simulation of complex engineering problems: effective numerical algorithms and parallel implementation using new information technologies within the program Information society administrated by the Academy of Sciences of the Czech Republic. We hope that the tradition of SNA conferences will be preserved even after finishing the MSTEP project in 2008. Seminář numerické analýzy 2009 (SNA ´09) je již šestým setkáním, z nichž první se uskutečnilo v roce 2003. Je věnován problematice numerických metod využívaných při matematickém modelování v řadě vědních oborů a stavitelství.
Keywords:
numerical analysis; mathematical modelling; information technologies
Available at various institutes of the ASCR
SNA ´09 - Seminar on Numerical Analysis
Seminar on Numerical Analysis 2009 (SNA’09) is the sixth meeting of a series of events started in Ostrava 2003 and devoted to numerical methods necessary for mathematical modelling of problems in ...
Our Blue Gene Experience
Jakl, Ondřej; Starý, Jiří
2009 - English
The paper describes our precious short-time opportunity to make some hands-on experience with the Bulgarian IBM Blue Gene/P system, where we tested the parallel scalability of our domain decomposition finite element solver on a greater number of processors and completed experiments with microstructure modelling of geocomposite materials. The tests showed that due to its relatively low computation/communication performance ratio this specific architecture may need optimizations of parallel codes to take advantage of its performance potential. Clanek popisuje cennou zkusenost autoru s bulharskym systemem IBM Blue Gene/P, kde na vetsim poctu procesoru testovali paralelni skalovatelnost vlastniho konecneprvkoveho resice, jenz vyuziva metody rozkladu oblasti, a take pocitali model mikrostruktury geokompozitnich materialu. Testy potvrdily, ze v dusledku relativne nizkeho pomeru vypocetniho a komunikacniho vykonu tato specificka architektura muze vyzadovat optimalizaci paralelnich kodu pro vyuziti jejiho vykonnostniho potencialu.
Keywords:
IBM Blue Gene/P; finite element solver; parallel scalability
Available at various institutes of the ASCR
Our Blue Gene Experience
The paper describes our precious short-time opportunity to make some hands-on experience with the Bulgarian IBM Blue Gene/P system, where we tested the parallel scalability of our domain ...
On the worst scenario metod: A modified convergence theorem nad its application to an uncertain differential equation
Harasim, Petr
2009 - English
We propose a theoretical framework for solving a class of worst scenario problems. The existence of the worst scenario is proved through the convergence of a sequence of approximate worst scenarios. The main convergence theorem modifies and corrects the relevant results already published in the literature. The theoretical framework is applied to a particular problem with an uncertain boundary value problem for a nonlinear ordinty differential equation with an uncertain coefficient. Navrhneme teoretický základ k řešení určité třídy problémů nejhoršího scénáře. Existenci řešení původního problému dokážeme pomocí posloupnosti aproximovaných nejhorších scénářů. Hlavní konvergenční věta modifikuje příslušné výsledky, již dříve publikované v literatuře. Navržený teoretický rámec potom aplikujeme na řešení problému s nelineární diferenciální rovnicí s nejistým koeficientem.
Keywords:
worst scenario problem; nonlinear differential equation; incertain input parameters
Available at various institutes of the ASCR
On the worst scenario metod: A modified convergence theorem nad its application to an uncertain differential equation
We propose a theoretical framework for solving a class of worst scenario problems. The existence of the worst scenario is proved through the convergence of a sequence of approximate worst scenarios. ...
Shading of Bézier Patches
Kolcun, Alexej; Bocek, J.
2009 - English
There are well known shading algorithms (Gouraud, Phong) for the surfaces shading. The problem is that such algorithms just approximate the real shading. Precise shading algorithms require the values of normal vectors at all points of rendered surface. Computation of normal vector for Cartesian and triangular parametric surfaces is presented in the paper.
Keywords:
Beziér patch; shading; normal vector surface
Available at various institutes of the ASCR
Shading of Bézier Patches
There are well known shading algorithms (Gouraud, Phong) for the surfaces shading. The problem is that such algorithms just approximate the real shading. Precise shading algorithms require the ...
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