Search Results - "Macháček, Jan"

Alluvial Artisanal and Small-Scale Mining in A River Stream—Rutsiro Case Study (Rwanda) by Jan Macháček

“…Artisanal and small-scale mining is a significant economic sector in Rwanda. Mining activities often use a watercourse, in which secondary extraction takes…”
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The Livelihood of Artisanal and Small-Scale Miners and Awareness of the Use of 3T Minerals in Rwanda-A Case Study in the Rutsiro District: A Qualitative Assessment by Macháček, Jan, Schlossarek, Martin, Lindagato, Philemon

“…This article examines the impact of artisanal and small-scale mining (ASM) on livelihood in mining communities in Rwanda (Rutsiro) where wolframite and coltan…”
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Modelling of the bending strength of refractory materials at elevated temperatures by Macháček, Jan, Hamáček, Jiří, Urbánek, Jan, Hlinčík, Tomáš

“…Determination of the bending strength at elevated temperatures (hot modulus of rupture - HMOR) is a test method for refractory products, for example, according…”
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Interpretation of experimental findings on the structure of glass in the CaO–MoO3–P2O5 system using a thermodynamic model including oxidation–reduction equilibria by Macháček, Jan, Liška, Marek, Hruška, Branislav, Gedeon, Ondrej

“…This work extends the thermodynamic model of associated solutions used in the past to describe the structure and properties of glasses to the area of complex…”
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Effect of long-term high-temperature exposure in a controlled atmosphere on mullite-corundum ceramics for advanced applications in nuclear power technology by Kočí, Jan, Hamáček, Jiří, Macháček, Jan, Vagenknechtová, Alice, Hlinčík, Tomáš

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Navigational Needs and Preferences of Hospital Patients and Visitors: What Prospects for Smart Technologies? by Ženka, Jan, Macháček, Jan, Michna, Pavel, Kořízek, Pavel

“…In this paper, we map navigational needs and preferences of patients and visitors to evaluate the appropriateness of a smartphone navigation application in the…”
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Nuclear Magnetic Shielding of Monoboranes: Calculation and Assessment of 11B NMR Chemical Shifts in Planar BX3 and in Tetrahedral [BX4]− Systems by Macháček, Jan, Bühl, Michael, Fanfrlík, Jindřich, Hnyk, Drahomír

“…11B NMR chemical shifts of tricoordinated BX3 and tetracoordinated BX4 – compounds (X = H, CH3, F, Cl, Br, I, OH, SH, NH2, and CHCH2) were computed, and the…”
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Thermodynamic model of ZnO‐Nb2O5‐P2O5 glasses – parameterization and validation by Liška, Marek, Macháček, Jan, Chromčíková, Mária, Holubová, Jana, Černošek, Zdeněk

“…On the basis of experimental structural data ten system components were considered in the ZnO‐Nb2O5‐P2O5 thermodynamic model of Shakhmatkin and Vedishcheva –…”
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Thermal isomerizations of monothiolated carboranes (HS)C2B10H11 and the solid-state investigation of 9-(HS)-1,2-C2B10H11 and 9-(HS)-1,7-C2B10H11 by Baše, Tomáš, Macháček, Jan, Hájková, Zuzana, Langecker, Jens, Kennedy, John D., Carr, Michael J.

“…At 300–500 °C, three C-thiolated closo-dicarbadodecaborane isomers 1-(HS)-1,2-C2B10H11 (1-o), 1-(HS)-1,7-C2B10H11 (1-m), and 1-(HS)-1,12-C2B10H11 (1-p), and…”
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Computational Study of Structures and Properties of Metallaboranes: Cobalt Bis(dicarbollide) by Bühl, Michael, Hnyk, Drahomír, Macháček, Jan

“…A density functional study at the BP86/AE1 level is presented for the cobalt bis(dicarbollide) ion [3‐Co‐(1,2‐C2B9H11)2]− (1) and selected isomers and rotamers…”
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Thermodynamic model and viscosity of Na2O–MgO–CaO–SiO2 glasses by Chromčíková, Mária, Liška, Marek, Macháček, Jan, Chovanec, Jozef

“…The structure–viscosity relationship of 15Na2O·xMgO·(10−x)CaO·75SiO2 (x=0, 2, 4, 6, 8, 10) glasses was studied. The structure of studied glasses was described…”
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Decaborane Thiols as Building Blocks for Self-Assembled Monolayers on Metal Surfaces by Bould, Jonathan, Macháček, Jan, Londesborough, Michael G. S, Macías, Ramón, Kennedy, John D, Bastl, Zdeněk, Rupper, Patrick, Baše, Tomáš

“…Three nido-decaborane thiol cluster compounds, [1-(HS)-nido-B10H13] 1, [2-(HS)-nido-B10H13] 2, and [1,2-(HS)2 -nido-B10H12] 3 have been characterized using NMR…”
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Structure of Na2O–MgO–CaO–SiO2 glasses by combined Raman spectroscopy and thermodynamic modeling approach by Chromčíková, Mária, Liška, Marek, Gavenda, Tadeáš, Macháček, Jan

“…The present contribution deals with the Raman spectra and structure of Na 2 O–MgO–CaO–SiO 2 glasses. Six glasses with the trisilicate overall composition 15Na…”
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Separating fluid and solid contact constraints for hydro-mechanically coupled finite elements discretising fluid displacement by Staubach, Patrick, Machaček, Jan

“…In the simulation of multi-phase porous media in contact with a structure, the contact constraints to be enforced depend on the spatially discretised variables…”
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Gold Micrometer Crystals Modified with Carboranethiol Derivatives by Baše, Tomáš, Bastl, Zdeněk, Šlouf, Miroslav, Klementová, Mariana, Šubrt, Jan, Vetushka, Aliaksei, Ledinský, Martin, Fejfar, Antonín, Macháček, Jan, Carr, Michael J, Londesborough, Michael G. S

“…The preparation and characterization of micrometer gold and silver single-crystals of well-defined shapes are reported here. The shapes of the crystals can be…”
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Thermodynamic model and Raman spectra of ZnO–P2O5 glasses by Liška, Marek, Lissová, Magdaléna, Plško, Alfonz, Chromčíková, Mária, Gavenda, Tadeáš, Macháček, Jan

“…Raman spectra of xZnO (100−x)P 2 O 5 ( x  = 35, 40, 45, 50, 55) glasses were described by the thermodynamic model of Shakhmatkin and Vedishcheva using the…”
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Spatially mixed implicit–explicit schemes in hydro-mechanically coupled soil dynamics by Staubach, Patrick, Machaček, Jan

“…Mixed implicit–explicit (IMEX) schemes combine elements of both implicit and explicit time integration methods. This allows to efficiently handle boundary…”
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Connectivity of Q-species in binary sodium-silicate glasses by Gedeon, Ondrej, Liška, Marek, Macháček, Jan

“…Series of sodium-silicate glasses were simulated by molecular dynamics. Glass structures were described in frame of Q-species. Connectivity among different…”
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Computational Studies of Structures and Properties of Metallaboranes. Part 3:  Protonated Iron Bis(dicarbollide), [3-Fe-(1,2-C2B9H11)2H] by Bühl, Michael, Hnyk, Drahomír, Macháček, Jan

“…On the basis of the energies and 11B NMR chemical shifts computed at the BP86/AE1(*) and GIAO-B3LYP/II‘ levels of density functional theory, respectively, the…”
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Long-Term Response of Piles to Cyclic Lateral Loading Following Vibratory and Impact Driving in Water-Saturated Sand by Staubach, Patrick, Machaček, Jan, Bienen, Britta, Wichtmann, Torsten

“…AbstractThe influence of the pile installation by vibratory or impact driving on the response to subsequent cyclic lateral loading, as faced in the offshore…”
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