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1.
A method to compute the number of regular reversible Rosenberg hypergroup
Ali Tavakoli, Morteza Jafarpour, Irina Cristea, 2016, izvirni znanstveni članek

Opis: The purpose of this note is the study of the hypergroups associated with binary relations. New types of matrices, called i-very good and regular reversible matrices, are introduced in order to give some properties of the Rosenberg hypergroups related to them. A program written in $MATLAB$ computes the number of these hypergroups up to isomorphism.
Najdeno v: ključnih besedah
Ključne besede: hypergroup, binary relation, regular reversible hypergroup, Boolean matrix
Objavljeno: 02.09.2016; Ogledov: 1618; Prenosov: 0
.pdf Polno besedilo (309,47 KB)

2.
Tungsten carbide thin films for electrochemical water splitting studies
Hasan Okuyucu, Matjaz Valant, Ali Semerci, Cesur Altinkaya, Saim Emin, Abdullah Yildiz, 2017, objavljeni povzetek znanstvenega prispevka na konferenci

Opis: We used wet-chemistry techniques to prepare colloidal tungsten (W) nanoparticles (NPs). The synthesis of W NPs was conducted using the so called hot-matrix method in 1-octadecene [1]. The sizes of obtained W NPs are in the order of 2 - 5 nm. These W NPs are coated with hydrophobic molecules which allow their dispersion in organic solvents like choloroform (CHCl3). It was found that the colloidal stability of the dispersions is exceptionally high exceeding several years. The stability of W NPs which prevents coagulation allows the preparation of thin films with uniform thicknesses by spin-coating, inkjet-printing and spray coating. We have prepared tungsten carbide (W2C, WC) thin films. The preparation of W2C and WC was achieved by spin-coating of pre-synthesized W NPs on graphite substrate and following heat treatment under Ar atmosphere at 1000 and 1450°C. The obtained W2C and WC films were used both in electrochemical water splitting studies. We also made a composite W2C-Pt films where we used only 5 at.% of Pt. The W2C-Pt composite has shown similar performance as pure Pt-C for hydrogen (H2) evolution. In conclusion, we have developed a procedure for the synthesis of W NPs which can be applied for the preparation of tungsten carbides films and their use for electrochemical water splitting.
Najdeno v: ključnih besedah
Povzetek najdenega: ...NPs was conducted using the so called hot-matrix method in 1-octadecene [1]. The sizes of...
Ključne besede: water splitting, nanoparticles, hot-matrix
Objavljeno: 09.10.2017; Ogledov: 1512; Prenosov: 0
.pdf Polno besedilo (376,30 KB)

3.
Boundary element simulation of linear water waves in a model basin
Clemens Hofreither, Ulrich Langer, Satyendra Tomar, 2010, objavljeni znanstveni prispevek na konferenci

Najdeno v: ključnih besedah
Ključne besede: boundary element method, linear water waves, hierarchical matrix representation, data-sparse matrix approximation
Objavljeno: 13.11.2018; Ogledov: 364; Prenosov: 4
.pdf Polno besedilo (210,55 KB)
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