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Searching for springs of the river Punkva
Kněžínek, K.; Kuda, František; Lejska, S.
2014 - Czech
The paper is devoted to exploration of hydrological conditions in the confluence area of streams Sloupský creek and Bílá voda creek, which is located in the Amateur Cave in the Moravian Karst. Somewhere in this complex part of the Amateur Cave arises river Punkva. The research attempting to connect hydrological data from water level gauges placed at selected locations and 3D model of the cave created by using laser scanning. The result should be hydrological model of studied part of the cave, but acquired data have potential for further research. Příspěvek je věnován zkoumání hydrologických poměrů v soutokové oblasti Sloupského potoka a Bílé vody, která se nalézá v Amatérské jeskyni v Moravském Krasu. Právě někde v této poměrně složité části Amatérské jeskyně vzniká řeka Punkdva. Výzkum se snaží o propojení hydrologických dat z hladinoměrů rozmístěných na vybraných lokalitách a 3D modelu jeskyně vytvářeného pomocí laserscanningu. Výsledkem by měl být hydrologický model zkoumané části jeskyně, pořízená data ale mají potenciál i pro další oblasti výzkumu.
Keywords:
hydrological conditions; Sloupský creek; river Punkva
Available in a digital repository NRGL
Searching for springs of the river Punkva
The paper is devoted to exploration of hydrological conditions in the confluence area of streams Sloupský creek and Bílá voda creek, which is located in the Amateur Cave in the Moravian Karst. ...
New Rock Mechanics Testing and Measuring System at the Institute of Geonics
Janeček, Ivan; Mishra, D.
2014 - English
New research tasks of the Department of laboratory research on geomaterials at the Institute of Geonics required improvement of experimental technique for investigation of the geomechanical properties of rocks and mastering of new rock testing methods as well. A new computer controlled hydraulic press with large set of adaptive accessories could meet the demands. With EU support of the project Institute of Clean Technologies for Mining and Utilization of Raw Materials for Energy Use (CZ.1.05/2.1.00/03.0082), a new Rock Mechanics System of the MTS Corporation was purchased, installed and put into operation.
Keywords:
rock testing; measurement under uniaxial and triaxial loading; testing of permeability and poroelastic response
Available in digital repository of the ASCR
New Rock Mechanics Testing and Measuring System at the Institute of Geonics
New research tasks of the Department of laboratory research on geomaterials at the Institute of Geonics required improvement of experimental technique for investigation of the geomechanical ...
The X-ray CT lab and the research at the Institute of Geonics AS CR
Souček, Kamil; Staš, Lubomír
2014 - English
In recent decades, non-destructive methods of materials analysis (Desrues 2006) have been used increasingly for the study of different kinds of materials. Especially, it concerns the method of the X-ray computed tomography (CT). This technique was invented in 1970's (Hounsfield 1972) and it quickly became an indispensable part of medicine. In the 1980's, this success in medicine encouraged the research and development of the X-ray CT applications in the field of materials engineering and consequently also in the field of geomaterials (Otani, Obara 2004). Nowadays, many applications are possible due to high resolution of individual building units in the tomographic cross-sections (so called voxels) with dimensions of units or tens of micrometres. To get this resolution, the use of the 2D and the 3D high-resolution X-ray CT, or the micro-CT with micro-focal sources of X-rays, and suitable linear or flat (2D) X-Ray detectors are preferred.
Keywords:
X-Ray computed tomography; non-destructive investigation of geomaterials; X-ray CT lab; rentgenové záření; materiály
Available in digital repository of the ASCR
The X-ray CT lab and the research at the Institute of Geonics AS CR
In recent decades, non-destructive methods of materials analysis (Desrues 2006) have been used increasingly for the study of different kinds of materials. Especially, it concerns the method of the ...
Brownfields in Karviná: Opportunity or Threat?
Martinát, Stanislav; Cyroňová, K.; Dvořák, Petr; Klusáček, Petr
2014 - Czech
Brownfields are in creasingly discussed topic among researchers and public administration representatives as well. Especially in peripheral areas and in regions affected by structural changes is an issue of brownfields due to their limited attractiveness for investments very specific. This paper aims to comment the issue of brownfields in the above type of area on the example of city of Karviná. The theoretical part of the paper discusses the economic, social and environmental aspects of brownfield regeneration. Then spatial analysis of these areas brownfields on the area studied city is Sborník p ř ísp ě vk ů X VII . mezinárodní kolokvium o regionálních v ě dách Hustope č e 18. – 20 . 6. 20 14 622 carried on from the point of view of their size, previous use, type of ownership, contamination and location within the city. The specifics of regeneration of mining brownfields are then formu lated. In the last part of the paper thematic survey conducted among the population of the city of Karviná (n = 150) is evaluated. The survey aimed to determine preferences for future use of brownfields and general perception of these areas by local popula tion. Brownfieldy jsou stále více diskutovaným tématem mezi výzkumníky i ve ř ejnou správou. Zvlá š t ě v periferních oblastech a v regionech posti ž ených strukturálními zm ě nami je problém brownfield ů s ohledem na jejich omezenou atraktivitu pro investory velmi specifický. P ř ísp ě vek se sna ž í komentovat problematiku brownfield ů ve vý š e uvedeném typu území na p ř íklad ě m ě sta Karviná. Ve své teoretické č ásti p ř ísp ě vek diskutuj e nad ekonomickými, sociálními a environmentálními aspekty regenerace brownfield ů , na co ž navazuje prostorová analýza t ě chto ploch na území Karviné, v jejím ž rámci zkoumána jejich velikost, p ř edchozí vyu ž ití, typ vlastnictví, kontaminace a umíst ě ní v rámci m ě sta. Jsou formulována specifika regenerace t ěž ebních brownfield ů . V poslední č ásti p ř ísp ě vku je vyhodnoceno tematické dotazníkové š et ř ení provedené mezi obyvatelstvem m ě sta (n=150), v n ě m ž byly zji šť ovány preference budoucího vyu ž ití brownfield ů a obecn ě percepce t ě chto ploch místními obyvateli. V záv ě ru jsou formulována doporu č ení jak ve ř ejné správ ě , tak investor ů m, jak p ř istupovat k problematice brownfield ů
Keywords:
brownfieldy; Karviná; Czech Republic; regeneration
Fulltext is available at external website.
Brownfields in Karviná: Opportunity or Threat?
Brownfields are in creasingly discussed topic among researchers and public administration representatives as well. Especially in peripheral areas and in regions affected by structural changes is an ...
Stability of suspension bridges in lateral wind
Malík, Josef
2014 - English
The collapse of the original Tacoma suspension bridge has been studied in many papers. On 7 November 1940 around 10 a.m. the torsional oscillations appeared on the deck of the original Tacoma bridge after the loosening of one midspan cable band, which resulted in the lateral asymmetry of the construction. It seems that the loosening of the midspan cable band had a significant impact on the behavior of the bridge and in the end it resulted in the collapse.
Keywords:
stability; suspension bridges; torsional oscillations
Available in a digital repository NRGL
Stability of suspension bridges in lateral wind
The collapse of the original Tacoma suspension bridge has been studied in many papers. On 7 November 1940 around 10 a.m. the torsional oscillations appeared on the deck of the original Tacoma bridge ...
The Analysis of Material Inner Structure and Industry X-ray Computed Microtomography
Souček, Kamil
2014 - Czech
In recent decades, non-destructive methods of materials analysis have been used increasingly for the study of different kinds of materials. Especially, it concerns the method of the X-ray industry computed microtomography (CT). This paper is elaborated on the basis of the experiences of X-ray CT use within the frame of research activities of the Institute of Geonics ASCR. Particularly, the possibilities and examples of the different kind material research by X-ray CT are presented. The X-ray CT systems fy. Nikom Metrology X TH 225 ST and XT H 450 at Institute of Geonics cover a wide range of the X-ray CT and radiography applications in the fields of analysis of materials and geomaterials (e.g. analysis of the pore space, inner structure and their defects), the inspection of small castings and plastic parts, as well as in the fields of palaeontology (e.g. inspection of bones, sculls, fossils etc.), size measurement of internal dimensions of the components, defectoscopy of machines and equipment parts and also in the field of biological structures analysis. V současné době jsou stále častěji využívány nedestruktivní metody analýzy různých typů materiálů. Jednu z takovýchto metod představuje především průmyslová rentgenová počítačová mikrotomografie (CT). Tento příspěvek je zpracován na základě zkušeností používání rentgenové průmyslové počítačové mikrotomografie v rámci výzkumných aktivit Ústavu geoniky AV ČR a pojednává o možnostech výzkumu různých typů materiálů pomocí této metody, včetně příkladů jejího použití. Rentgenové CT systémy firmy Nikom Metrology X TH 225 ST a XT H 450 na Ústavu geoniky pokrývají širokou oblast tomografických a radiografických aplikací, například v oblasti analýzy materiálů a geomateriálů (např. analýza pórového prostoru, vnitřní stavby a jejich defektů), stejně tak jako v oblasti kontroly malých odlitků a plastových dílů, v oblasti paleontologie (např. kontrola kosti, lebek, fosílií apod.), měření velikosti vnitřních rozměrů součástek, defektoskopie strojů a částí zařízení a rovněž v oblasti analýzy biologických struktur.
Keywords:
X-ray computed microtomography; inner structure of materials; porosity; defectoscopy
Available in a digital repository NRGL
The Analysis of Material Inner Structure and Industry X-ray Computed Microtomography
In recent decades, non-destructive methods of materials analysis have been used increasingly for the study of different kinds of materials. Especially, it concerns the method of the X-ray industry ...
Geosite and geomorphosite assessment for geotourism purposes: a case study from the Vizovická vrchovina Highland, Eastern Moravia
Kirchner, Karel; Kubalíková, L.
2014 - English
Contribution deals with the problem of geodiversity, geoheritage and possibilities of their assessment for geotourism purposes. Geological, geomorphological and pedological sites are the most important resource for the geotourism activities. To find out which site can be used, it is necessary to identify, describe and assess various sites using a suitable assessment methodology. Based on the definition and concepts of geotourism and the assessment methods already used for geomorphosite assessment, authors propose five groups of assessment criteria. The method was used for assessing selected sites in the Vizovická vrchovina Highland.
Keywords:
geodiversity; numerical assessment; Outer Western Carpathians
Available in a digital repository NRGL
Geosite and geomorphosite assessment for geotourism purposes: a case study from the Vizovická vrchovina Highland, Eastern Moravia
Contribution deals with the problem of geodiversity, geoheritage and possibilities of their assessment for geotourism purposes. Geological, geomorphological and pedological sites are the most ...
Methodology for 3D visualization of buildings and structure of geomaterials using industrial X-ray computed tomography - principles for ensuring the quality of tomographic data
Souček, Kamil; Staš, Lubomír
2014 - Czech
Worked out methodology was created for the determination of the basic procedures designed for obtaining the best possible quality tomographic data using X-ray computed tomography. The methodology was created for the needs of 3D visualization of the geomaterials internal structure (eg. rock, soil, building materials, goecomposites etc.) and for the purposes of carrying out qualitative and quantitative non-destructive material analysis of 3D internal structure of investigated geomaterials. Obtaining the high-quality tomographic data represents primarily the process of setting various parameters of X-ray CT scanners, which are described in this methodology. The indisputable advantage and the novelty of this methodology present its non-destructivity and possibility for analysis of investigated geo-materials in three-dimensional space. The methodology has been prepared and it can be used for two types of X-ray CT scanners from Nikon Metrology NV company XT H 450 2D/3D and XT H 225 ST. Zpracovaná metodika byla vytvořena pro stanovení základního postupu určeného pro získání co možná nejkvalitnějších tomografických dat pomocí rentgenové počítačové tomografie (RTG CT) pro účely 3D vizualizace vnitřní stavby geomateriálů (např. horniny, zeminy, stavební materiály, geokompozity apod.) a pro potřeby provádění nedestruktivních kvalitativních i kvantitativních materiálových analýz 3D vnitřní stavby studovaných geomateriálů. Získání kvalitních tomografických dat reprezentuje především proces nastavení různých parametrů RTG počítačového tomografu, který je podrobně popsány v textu metodiky. Nespornou výhodu a novost této metodiky představuje její nedestruktivnost a možnost analyzovat vyšetřované geomateriály v trojrozměrném prostoru. Metodika je zpracována a je ji možno použít pro dva typy RTG CT tomografů firmy Nikon Metrology NV XT H 450 2D/3D a XT H 225 ST.
Keywords:
3D visualisation; X-ray computer tomography; geomaterials
Available in a digital repository NRGL
Methodology for 3D visualization of buildings and structure of geomaterials using industrial X-ray computed tomography - principles for ensuring the quality of tomographic data
Worked out methodology was created for the determination of the basic procedures designed for obtaining the best possible quality tomographic data using X-ray computed tomography. The methodology was ...
Optimization methods for inverse problems with energy norm
Hrtus, Rostislav; Haslinger, Jaroslav; Blaheta, Radim
2014 - English
The paper deals with the application of the energy norm in the inverse problem which is based on a minimization of a nonlinear least squares function. Three different parameter distribution examples are solved by the steepest descent, nonlinear conjugate gradient and Newton methods. Efficiency comparison is also presented.
Keywords:
optimization methods; parameter distribution; Newton methods
Available in a digital repository NRGL
Optimization methods for inverse problems with energy norm
The paper deals with the application of the energy norm in the inverse problem which is based on a minimization of a nonlinear least squares function. Three different parameter distribution examples ...
Flash floods in the Czech lands on examples from the 16th – 21st centuries
Munzar, Jan; Ondráček, Stanislav
2014 - Czech
An often discussed and still topical question is whether the frequency of the occurrence of flash floods has been increasing in the last decennia or the impression results only from the increased interest (and improved technical possibilities) of media and wide public in these extreme hydro-meteorological phenomena. There are many floods of this type that can be documented from the past, which occurred before the hydro-meteorological measurements. Although they did not affect vast areas, they usually represented (similarly as today) crushing disasters for the hit territories. The contribution brings examples of such extremes from the end of the 16th century to the beginning of the 21st century, which went down in the flood history of the affected areas. Často diskutovanou a stále aktuální otázkou je, zda se v posledních desetiletích zvyšuje četnost výskytu přívalových povodní nebo je to dáno jen větším zájmem (i technickými možnostmi) médií a širší veřejnosti o tyto extrémní hydrometeorologické jevy. Z minulosti lze však doložit řadu případů povodní tohoto typu, ke kterým docházelo samozřejmě i před počátkem hydrometeorologických měření. Nepostihovaly sice rozsáhlé oblasti, ale pro zasažené území většinou znamenaly (stejně jako dnes) zničující katastrofu. V příspěvku jsou uvedeny příklady takovýchto extrémů od konce 16. do počátku 21. století, které se zapsaly do povodňové historie postižených území.
Keywords:
flash floods; 16th-21st centuries; Czech lands
Available in digital repository of the ASCR
Flash floods in the Czech lands on examples from the 16th – 21st centuries
An often discussed and still topical question is whether the frequency of the occurrence of flash floods has been increasing in the last decennia or the impression results only from the increased ...
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