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472. Project of a rock mass surface deformation monitoring system in the Walbrzych Coal Basin
- Creator:
- Blachowski, Jan, Milczarek, Wojciech, and Cacoń, Stefan
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Geologie. Meteorologie. Klimatologie, hlubinné dobývání, underground mining, deformation monitoring, satellite and levelling research network, 7, and 551
- Language:
- English
- Description:
- Underground mining hard coal in the area of Walbrzych ended in the late 90-ties of the last Century. Its effects on the state of heterogeneous rock mass (complicated geology and tectonics) is still evident and not known precisely. Analysis of levelling measurement results carried out after the end of mining activity (1997-2008) for part of the former “Thorez” mine indicates increased rock mass surface activity in tectonic zones. With the aim to continue monitoring of the rock mass surface movements on the area of former mining grounds a research satellite GPS network (7 points) has been established and supplemented with new precise levelling lines linked to the existing 2nd class levelling network. Location of these points takes into consideration, among other things geology and tectonics of the Walbrzych Basin and areas of underground mining activity. In this paper work on the design and construction of the research satellite GPS and levelling networks has been described and the first measurement campaign carried out in September 2009 has been presented. Its results will form foundation for complex studies of rock mass surface in the next measurement epochs., Jan Blachowski, Wojciech Milczarek and Stefan Cacoń., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
473. První česká geoložka Milada Vavřínová /
- Creator:
- Slepičková, Radka
- Type:
- text and články
- Subject:
- Geologie. Meteorologie. Klimatologie, Biografie, Vavřínová, Milada,, geologové, bibliografie personální, Československo 1918-1992, vědy o neživé přírodě, přírodní prostředí, astronomie, and personální bibliografie
- Language:
- Czech
- Rights:
- unknown
474. Quasi-diurnal atmospheric and oceanic excitation of nutation
- Creator:
- Jan Vondrák and Cyril Ron
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Geologie. Meteorologie. Klimatologie, geodezie, geodesy, Earth orientation, nutation, geophysical excitation, VLBI, 7, and 551
- Language:
- English
- Description:
- The periodic motion of the Earth's spin axis in space (nutation) is dominantly forced by external torques exerted by the Moon, Sun and planets. On the other hand, long-periodic geophysical forces (with periods longer than several days), mostly caused by the changes in the atmosphere and oceans, have dominant effects in polar motion (in terrestrial frame) and Earth's speed of rotation. However, even relatively small short-periodic (near-diurnal) motions of the atmosphere and oceans can also have a non-negligible influence on nutation, thanks to the resonance that is due to the existence of a flattened outer fluid core. The retrograde period, corresponding to this resonance, is roughly equal to 430 days in non-rotating quasi-inertial celestial reference frame, or 23h 53min (mean solar time) in the terrestrial frame rota ting with the Earth. The aim of the present study is to use the geophysical excitations in the vicinity of this resonance to estimate their influence on nutation, based on recent models of atmospheric and oceanic motions. To this end, we use the numerical integration of Brzezinski's broad-band Liouville equations and compare the results with VLBI observa tions. Our study shows that the atmospheric plus oceanic effects (both matter and motion terms) are capable of exciting free core nutation; both its amplitude and phase are compatible with the observed motion. Annual and semi-annual geophysical contributions of nutation are of the order of 100 microarcseconds. They are slightly different for different at mospheric/oceanic models used, and they also differ from the values observed by VLBI - the differences exceed several times their formal uncertainties., Jan Vondrák and Cyril Ron., and Obsahuje bibliografické odkazy
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
475. Quasigeoid on chose areas of investigations geodynamics
- Creator:
- Banasik, Piotr
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Geologie. Meteorologie. Klimatologie, nivelace, GPS (navigační systém), leveling, GPS (navigation system), quasigeoid, geoid, geodynamic network, 7, and 551
- Language:
- English
- Description:
- In the paper a problem of elaboration and the use local quasige oid on mining areas in south-eastern Poland is discussed. The models were elaborated within research projects carried by Institution of Geodesy and Cartography AGH in years 1996-2005 and related to mining caused terrain surface deformation problems. One part of the carried research was elaboration of quasi-geoid model that can be used in practical aspects of mine surveying. There is an example of this quasi-geoid model application in leveling surveys presented in the paper. Furthermore, discussed quasi-geoid models elaborated for small areas provide detailed information about the shape of this surface and they determine database completing existing country models as for example Leveling Geoid 2001 for area of Poland., Piotr Banasik., and Obsahuje bibliografické odkazy
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
476. Raman spectroscopy study of interfacial transition zone in cement composite reinforced by PP/PE and basalt fibres
- Creator:
- Machovič, Vladimír, Kolář, František, Petr Procházka, Šárka Pešková, and Pavel Kuklík
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Geologie. Meteorologie. Klimatologie, Ramanova spektroskopie, cementové kompozitní materiály, Raman spectroscopy, cement composites, interfacial transition zone, polymer fibers, basalt fibers, 7, and 551
- Language:
- English
- Description:
- The structural changes of interfacial transition zone of two concrete systems reinforced by polypropylene/polyethylene and basalt fibers were studied by Raman microspectroscopy. The interfacial transition zone was found in the 0-20 μm in vicinity of quartz/feldspar aggregate surface. The calcium carbonate, ettringite and alite and belite bands were used for determination of interfacional transition zone size by Raman spectroscopy. Similar behaviour has been shown the cement matrix in neighbourhood of PP/PE fibers. There is not observed any concentration gradient of cement hydration product in the vicinity of 1 μm diameter basalt fiber., Vladimír Machovič, František Kolář, Petr P. Procházka, Šárka Pešková and Pavel Kuklík., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
477. Raw Materials and the End of the World :
- Creator:
- Cílek, Václav,
- Type:
- text and studie
- Subject:
- Geologie. Meteorologie. Klimatologie, krize společenské, suroviny, globalizace, přehledná zpracování světových dějin (chronologicky), and vědy o neživé přírodě, přírodní prostředí, astronomie
- Language:
- English
- Rights:
- unknown
478. Recent displacements registered in selected caves of Dobrá voda karst area in Slovakia
- Creator:
- Briestenský, Miloš and Stemberk, Josef
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Geologie. Meteorologie. Klimatologie, zemětřesení, earthquake, Slopy Cave, Zbojnícka Cave, micro-displacements, fault, 7, and 551
- Language:
- English
- Description:
- Micro-displacement monitoring in Slopy a nd Zbojnícka caves is described. It st arted at the end of 2005 with the use o f verified, stable and sensitive 3D crack gauges TM71 produced by GESTRA Sedloňov. Two gauges were installed in the caves across significant tectonic structures. Registered displacements are pertinent to the last significant earthquake events. The f irst one appeared in March 13, 2006 at Vrbové, M=3.2; and later in August 5-8, 2006, a swarm of 10 quakes M max = 2.2 at Trstín was registered. The results indicated trends of dextral strike-slip displacements across observed fault structures in both of those caves., Miloš Briestenský and Josef Stemberk., and Obsahuje bibliografické odkazy
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
479. Recent geo-kinematics of Slovakia based on homogenized solutions of permanent and epoch GPS networks
- Creator:
- Ján Hefty, Hipmanová, Linda, Ľubomíra Gerhátová, Miroslava Igondová, and Droščák, Branislav
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Geologie. Meteorologie. Klimatologie, GPS sítě, GPS netwoks, GPS, geo-kinematics, regional horizontal and vertical velocity field, surface deformation analysis, 7, and 551
- Language:
- English
- Description:
- The paper is focused to the analysis of permanent and epoch-wise GPS networks extending over the region of Slovakia. We considered almost all available GPS data measured in Slovakia and its close surroundings over the period of last 17 years. Our analysis is based on combination of homogenized permanent and epoch-wise network solutions leading to the ITRF2005 related coordinates, velocities and their global covariance matrix. Estimated velocities were further reduced for APKIM2005d plate motion model and submitted to the velocity filtering and smoothing using the least square collocation approach. The obtained homogenized intra-plate velocity field is then used for the surface deformation analysis. The final and partial results of this procedure are discussed in order to extend information about recent regional geo-kinematics of Slovakia., Ján Hefty, Linda Hipmanová, Ľubomíra Gerhátová, Miroslava Igondová and Branislav Droščák., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
480. Recent local geodynamics in the central part of the Stołowe Mts
- Creator:
- Cacoń, Stefan, Otakar Švábenský, Kapłon, Jan, Kontny, Bernard, Josef Weigel, and Kopecký, Jiří
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Geologie. Meteorologie. Klimatologie, geodynamika, GPS (navigační systém), gravimetrie, geodynamics, GPS (navigation system), gravimetry, Góry Stołowe (Polsko : pohoří), Góry Stołowe Mountains (Poland), horizontal velocities, 7, and 551
- Language:
- English
- Description:
- The paper presents results of epoch satellite GPS and gravimetric measurements performed on the geodynamic network in central part of the Stołowe Mts. between 1993 and 2009. The research results show significant changes of gravity on most of the points and significant horizontal movement of one point in the central part of the area. The results confirm present day activity of the zone where faults Polický, Bělský and Czerwona Woda Fault Zone exists. In addition, they correspond with the studies of seismic activity in this part of the Sudety Mts., Stefan Cacoń, Jan Kapłon, Bernard Kontny, Josef Weigel, Otakar Švábenský and Jiři Kopecký., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public