National Repository of Grey Literature 98 records found  beginprevious21 - 30nextend  jump to record: Search took 0.01 seconds. 
Strength, elasticity, and fracture of composites with pyrolysed matrices based on methylsiloxane resins with optimized ratio of “T” and “D” components
Černý, Martin ; Žaloudková, Margit ; Glogar, Petr ; Sucharda, Zbyněk ; Strachota, Adam ; Chlup, Zdeněk
The investigated composites reinforced with Nextel720 fibers reveal acceptable mechanical properties for applications exposed to temperature up to 1300 °C. Mechanical properties were studied after three-hour exposition at 1300, 1400 and 1500 °C without a protective atmosphere. This temperature treatment increases the mechanical strength up to 15 %.
The use of mixed waste polymers in thermal treatment with brown coal
Kříž, Vlastimil ; Bičáková, Olga ; Machač, P.
Samples of brown coal from Jiří Mine alone and its mixtures with waste plastics were gasified on a laboratory scale. Using a thermal-degratation module, inserted in the stream of volatile products of pyrolysis and gasification, energetic gas with with higher hydrogen content was obtained.
Inorganic wastes like raw material for geopolymer binders
Hanzlíček, Tomáš ; Perná, Ivana
Great amount of industry wastes lead to the technology which are able to use waste materials as additives to different types of matter or convert industry waste materials to the new basic material.
Al-enriched water from unsaturated zone of sandstone: The most acidified environment in the Czech Republic by the atmospheric deposition?
Bruthans, J. ; Schweigstillová, Jana
The study describes chemistry and isotopic composition of water from unsaturated zone of sandstone. Studied waters are extremely acidified. Isotopic composition of H and O of studied waters lies at local line of meteoric water.
Seismic swarm at the Hronov-Poříčí Fault in January 2008
Málek, Jiří ; Stejskal, Vladimír ; Zedník, Jan
In January 2008 the small-aperture seismic array Ostaš in East Bohemia registered 189 microearthquakes, forming seismic swarm. Basic information about this swarm is given in the paper.
Monitoring of seismic impact on historical buildings and thier damage during building the tunnel Blanka – especially influence on the stability of historical buildings in the Prague Castle area
Brož, Milan ; Štrunc, Jaroslav ; Svatoš, J.
The persistence of unique historical buildings is restricted due to weathering of construction material enhanced by meteorological processes such as storms, driving rain and temperature variations beneath the freezing point. Dynamic forces endangering the mechanical stability of exposed elements of building structures could be caused by impacts of seismic waves.
Doupovské hory mts. – refraction profiles 30 june 2008
Brož, Milan ; Málek, Jiří
The Doupov volcanic komplex forms the Doupovské hory mts. in the western part of the Bohemian Massif, Czech republic. For several reasons, detailed geological and geophysical studie sof this interesting region arre still lacking. The situation improves as seismic measurements were perfomed there in June 2008.
Carbon particles in mine-stone dumps after bituminous coals mining
Sýkorová, Ivana ; Havelcová, Martina ; Klika, Z. ; Trejtnarová, Hana ; Fojtíková, M. ; Šulc, Alexandr
The influence of heating on optical properties and morphology of organic matter was studied in mine-stone dumps in three districts in the Czech Republic.
Grant project solving and final summarization, Registration number of project: 102/07/0794, Name of project: Sensor of Rotational Movement around Vertical Axis for Seismology
Štrunc, Jaroslav
Within this project were developed prototypes of the seismic rotation motion based on the two principles and also a generator of rotational motion that can be used for seismic prospection. During the theoretical works and experiments we found that generator and sensor of rotational motion can be used in geophysical prospecting.

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