Autor: Horácek, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Resonance contributions to low-energy electron collisions with molecular hydrogen
Autorzy:: Horácek, J.
Cížek, M.
Houfek, K.
Kolorenc, P.
Pichl, L.
Powiązania:: https://bibliotekanauki.pl/articles/148461.pdf
Data publikacji:: 2003
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: electron scattering
molecules
attachment
vibrational excitation
Opis:: Calculations of electron dissociative attachment and vibrational excitation of molecular hydrogen by low-energy electrons based on an improved nonlocal resonance model are reported. The role of the rotational excitation of the target molecules is discussed.
Źródło:: Nukleonika; 2003, 48, 2; 109-112
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Preparation and noise analysis of polymer graphite cathode
Autorzy:: Knápek, A.
Horáček, M.
Chlumská, J.
Kuparowitz, T.
Sobola, D.
Šikula, J.
Powiązania:: https://bibliotekanauki.pl/articles/220760.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: field emission
polymer graphite
noise analysis
Opis:: The paper deals with the preparation and measurement of an experimental polymer graphite cathode that seems to be a promising and cheap source of electrons utilizing cold field-emission in high- and ultra-high vacuum. Polymer graphite seems to be a proper material as it contains a large amount of hybridized carbon with a low degree of surface oxidation and silicon monoxide (SiO). Within the frame of this work, a special experimental method of tip preparation has been designed and tuned. This method is based on ion milling inside a dual-beam electron microscope enabling to obtain ultra-sharp tips of a diameter smaller than 100 nm with a predefined opening angle. The charge transport within experimental samples is evaluated based on results provided by the noise spectroscopy of the total emission current in the time and frequency domains.
Źródło:: Metrology and Measurement Systems; 2018, 25, 3; 451-458
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Gating systems for sizeable castings from Al alloys cast into ceramic moulds
Autorzy:: Stachovec, I.
Horáček, M.
Zemčík, L.
Kolda, V.
Horenský, J.
Powiązania:: https://bibliotekanauki.pl/articles/382771.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: technologia informatyczna
przemysł odlewniczy
krzepnięcie
układ wlewowy
forma ceramiczna
symulacja
information technology
foundry industry
solidification
gating systems
ceramic mould
simulation
Opis:: In contrast to casting to conventional non-reusable 'sand' moulds, for which calculating technique for an optimum design of the gating system is comparatively well-developed, a trial-and-error method is applied mostly for casting to ceramic shell moulds made by the investment casting technology. A technologist selects from gating systems of several types (that are standardized by the foundry mostly) on the basis of experience. However, this approach is not sustainable with ever growing demands on quality of castings and also the economy of their fabrication as well as with new types of complex sizeable castings introduced to the production gradually (by new customers from the aircraft industry above all) any more. The simulation software may be used as a possible tool for making the process of optimising gating systems more effective.
Źródło:: Archives of Foundry Engineering; 2012, 12, 2; 65-68
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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