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Collection's Items (Sorted by Submit Date in Descending order): 1 to 12 of 12
Sedláček, Jan , Kůs, Michal , Strob, Miroslav , Matas, Richard
CFD analysis of an anemometric sensor design for air flow measurement in a heat exchanger

This paper focuses on the issue of flow measurement in automotive heat exchangers. The measurement is complicated due to the limited space in the heat exchanger area and the non-uniform velocity profile. Therefore, only some measuring techniques can be used, which must be adapted&#...

Matas, Richard , Syka, Tomáš , Hurda, Lukáš , Linhartová, Zuzana
Numerical modelling and experimental investigation of the influence of selected geometric elements on the working characteristics of radial compressor stages with prismatic blades

The article deals with a description of basic results of research of radial compressor stages with 2D e.g. prismatic rotor blades. The experimental facility and the measurement and evaluation process are described briefly in the first part. The second part of this contribution is&#...

Monkova, Katarina , Urban, Marek , Morávka, Štefan , Monka, Peter Pavol , Božić, Željko
Development and analyses of a lever system for a newly designed self-equalising thrust bearing

Thrust bearings are undoubtedly one of the essential parts of turbines and compressors. However, there are many cases in which asymmetric load occurs on the bearings due to e.g. thermal deformations, production inaccuracies or a simple deflection of the shaft. The presented research...

Tomáš, Martin , Gholami, Fatemeh , Gholami, Zahra , Sedláček, Jan
Catalysts for Oxygen Reduction Reaction in the Polymer Electrolyte Membrane Fuel Cells: A Brief Review

This mini-review presents a short account of materials with exceptional activity towards oxygen reduction reaction. Two main classes of catalytic materials are described, namely platinum group metal (PGM) catalyst and Non-precious metal catalyst. The classes are discussed in terms of possible...

Naseri, Mosayeb , Al-Jaary, Ali H. Reshak , Boochani, Arash , Rai, D. P. , Matin, Laleh Farhang , Solaymani, Shahram
Effect of Si and Ge Surface Doping on the Be2C Monolayer: Case Study on Electrical and Optical Properties

The electronic and optical properties of X (Si, Ge) doped Be2C monolayer has been investigated using the all-electron full potential linear augmented plane wave (FP-LAPW+lo) method in a scalar relativistic version as embodied in the Wien2k code based on the density functional theory.&#x...

Kobayashi, Masaki , Anh, Le Duc , Minár, Jan , Khan, Walayat , Borek, Stephan , Hai, Pham Nam , Harada, Yoshihisa , Schmitt, Thorsten , Oshima, Masaharu , Fujimori, Atsushi , Tanaka, Masaaki , Strocov, Vladimir N.
Minority-spin impurity band in n-type (In,Fe)As: A materials perspective for ferromagnetic semiconductors

Fully understanding the properties of n-type ferromagnetic semiconductors (FMSs), complementary to the mainstream p-type ones, is a challenging goal in semiconductor spintronics because ferromagnetism in n-type FMSs is theoretically nontrivial. Soft-x-ray angle-resolved photoemission spectroscopy (SX-ARPES) is a...

Fanciulli, Mauro , Schusser, Jakub , Lee, Min-I , El Youbi, Zakariae , Heckmann, Olivier , Richter, Christine M C , Cacho, Cephise , Spezzani, Carlo , Bresteau, David , Hergott, Jean-Francois , D'Oliveira, Pascal , Tcherbakoff, Olivier , Ruchon, Thierry , Minár, Jan , Hricovini, Karol
Spin, time, and angle resolved photoemission spectroscopy on WTe2

We combined a spin resolved photoemission spectrometer with a high-harmonic generation (HHG) laser source in order to perform spin, time, and angle resolved photoemission spectroscopy (STARPES) experiments on the transition metal dichalcogenide bulk WTe2, a possible Weyl type-II semimetal. Measurement...

Kališ, Vladimír , Rušavý, Zdeněk , Havelková, Linda , Zítka, Tomáš , Tolar, David , Ismail, Khaled M.
Metrics of perineal support (MOPS) study

Background: Manual perineal protection (MPP) is an intrapartum intervention suggested to protect perineal integrity during childbirth. Proper execution of MPP is complex and evaluation of its true contribution is difficult in the clinical setting because of the large number of obstetric vari...

Alcalá, Jorge , Očenášek, Jan , Varillas, Javier , El-Awady, Jaafar A. , Wheeler, Jeffrey M. , Michler, Johann
Statistics of dislocation avalanches in FCC and BCC metals: dislocation mechanisms and mean swept distances across microsample sizes and temperatures

Plastic deformation in crystalline materials consists of an ensemble of collective dislocation glide processes, which lead to strain burst emissions in micro-scale samples. To unravel the combined role of crystalline structure, sample size and temperature on these processes, we performed a c...

Azam, Sikander A. , Khan, Saleem Ayaz , Khenata, Rabah , Naqib, S. H. , Abdiche, Ahmed , Uǧur, Şule , Bouhemadou, Abdelmadjid , Wang, Xiaotian
An ab-initio investigation of the electronic structure, chemical bonding and optical properties of Ba2HgS5 semiconductor

In this manuscript, the electronic structure, bonding nature and optical properties of the ternary Ba2HgS5 compound was investigated using the density functional theory (DFT). The generalised gradient approximation (GGA), Engel and Vosko generalised gradient approximation (EV-GGA) and the modified Bec...

Hurda, Lukáš , Matas, Richard , Redmer, Marek
Analysis of room overpressure after launching an integrated extinguishing system

The throttling of liquefied substances from high pressure vessels to an enclosed volume starting at atmospheric pressure is described in order to determine the thermodynamic state of gaseous contents of the extinguished room. A time dependent, 0D mathematical model is implemented describing&...

Khan, Saleem Ayaz , Vondráček, Martin , Blaha, Peter , Horáková, Kateřina , Minár, Jan , Šipr, Ondřej , Cháb, Vladimír
Local geometry around B atoms in B/Si(111) from polarized x-ray absorption spectroscopy

The arrangement of B atoms in a doped Si(111)-( √ 3 × √ 3)R30◦:B system was studied using a near-edge x-ray absorption fine structure (NEXAFS). Boron atoms were deposited via segregation from the bulk by flashing the sample repeatedly. The positions of B atoms are determi...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 12 of 12