1. Micro-scale responses of granular materials under different confining pressures using the discrete element methodMahmud Sazzad, 2016, izvirni znanstveni članek Opis: Biaxial compression tests were carried out on assemblies of ovals to study the micro-scale responses of granular materials under different confining pressures using the discrete element method (DEM). A total of 8450 ovals were generated in a rectangular frame without any overlap. Four dense samples were prepared from the initially generated sparse sample under different confining pressures. The simulated results yield a stress-straindilatancy behaviour similar to that observed in sands under different confining pressures. The evolution of the different microparameters and their inter-relationships are established. When the confining pressure is relatively high, the difference between the coordination number and the effective coordination number is very small; however, the difference is apparent for a low confining pressure. The microtopology of the granular assembly at several important states of shear is also reported. It is noted that the topological distribution of the granular materials is confining- pressure dependent. The normalized void-cell number is a minimum under the lowest confining pressure, whereas the same number is a maximum under the highest confining pressure. A linear relationship is observed between the normalized void-cell number and the effective coordination number, regardless of the confining pressures. The evolution of the deviatoric fabric for different confining pressures is measured and the macro-micro relationship is presented.
Ključne besede: microstructures, confining pressure, fabric, microtopology, coordination number, macro-micro relationship
Objavljeno v DKUM: 15.06.2018; Ogledov: 1065; Prenosov: 78
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2. Towards European Union or regional economic area : Western Balkans at crossroadsGazmend Qorraj, 2018, izvirni znanstveni članek Opis: The aim of the paper is to reflect upon the dilemma or whether the EU will continue the integration process in the Western Balkans or backlash on regional cooperation instruments and initiatives within the framework of the Western Balkans. The Regional Economic Area (REA) is analyzed as the more recent policy of the European Union for the remaining Balkan countries. It is crucial to analyze the idea behind REA, starting from two main assumptions: first, the creation of REA stemmed from EU internal challenges; and second, REA came up as a creative EU approach in efforts to find a specific model for reforms in the Western Balkans in the frame of regional institutions. The paper also discusses regional trade and specifically the role of the Regional Cooperation Council (RCC) in coordinating these initiatives in the Western Balkans. Taking into consideration the EU current challenges as well as difficulties of the Western Balkan countries to overcome the political and economic problems, then regional cooperation could appear as an alternative to the EU integration process for the Western Balkans. The main conclusion of this paper is that the Western Balkans needs the EU’s direct support, in particular, since RCC and other regional instruments cannot enforce, support and monitor the initiatives and reforms in the region.
Ključne besede: Western Balkans, integration, cooperation, coordination, regional, enlargement
Objavljeno v DKUM: 03.05.2018; Ogledov: 1018; Prenosov: 152
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3. Synthesis, crystal structure and magnetic properties of a new hydroxylammonium fluoroferrateBrina Dojer, Matjaž Kristl, Zvonko Jagličić, Amalija Golobič, Marta Kasunič, Mihael Drofenik, 2012, izvirni znanstveni članek Opis: This paper reports on the synthesis of a new hydroxylammonium fluoroferrate, with the formula $(NH_3OH)_3FeF_6$, obtained after dissolving iron powder in hydrofluoric acid and adding solid $NH_3OHF$. This new compound has been characterized by chemical and thermal analysis, single-crystal X-ray diffraction, and magnetic measurements. The title compound crystallizes trigonal, R3c, with cell parameters a = 11.4154(2) Å, c = 11.5720(2) Å, Z = 6. The structure consists of $NH_3OH^+$ cations and isolated $FeF_6^{3–}$ octahedra in which the central ion lies on a threefold axis. The oxygen and nitrogen atoms of the hydroxylammonium cations are donors of hydrogen bonds to fluoride anions, resulting in a network of hydrogen bonds between counterions. The effective magnetic moment $µ_{eff}$ = 5.8 BM was calculated and perfectly matches the expected value of high-spin Fe(III) ions. The thermal decomposition of the compound was studied by TG, DSC, and X-ray powder diffraction.
Ključne besede: inorganic chemistry, crystallography, coordination compounds, synthesis, crystal structure, characterization of compounds, determination of the structure of compounds, X-ray diffraction, magnetic measurements, thermal analysis, TG, DSC, hydrogen bond, metal complexes, hydroxylammonium fluoromethalatehydroxylammonium, fluoroferrate
Objavljeno v DKUM: 25.08.2017; Ogledov: 1618; Prenosov: 62
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4. Synthesis and characterisation of hydroxylammonium fluorochromateMatjaž Kristl, Mihael Drofenik, Ljubo Golič, Amalija Golobič, 2003, izvirni znanstveni članek Opis: Reactions in the system $Cr – NH_3OHF – HF – H_2O$ were investigated. Green crystals of a new compound with the formula $(NH_3OH)_3CrF_6$ have been isolated from the water solution and characterized by chemical analysis. The compound crystallizes as triclinic, P-1, with cell parameters: a = 6.5461(2) Å, b = 6.9347(2) Å, c = 9.4072(3) Å, α = 86.772(1)°, β = 83.804(1)°, γ = 70.283(1)°. The effective magnetic moment, $µ_{eff}$ = 3.82 BM, was calculated from magnetic susceptibility measurements in the temperature range 80-290 K. The thermal decomposition of the compound was studied by TG and DSC analysis. $(NH_3OH)_3CrF_6$ decomposes above 125 °C in three steps and the residue has been identified by X-ray powder diffraction as $α – Cr_2O_3$.
Ključne besede: inorganic chemistry, structural chemistry, crystalline structure, coordination compounds, synthesis, inorganic reactions, thermal decomposition, characterization of compounds, TG, DSC, X-ray diffraction, chromium complexes, hydroxylammonium fluoro chromates, crystals
Objavljeno v DKUM: 25.08.2017; Ogledov: 1387; Prenosov: 108
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5. The crystal and molecular structures of two reaction products of geminal dicyano oxirane with thiohydantoine (compound I) and thioxobenzoxazole (compound II)Ivan Leban, Alenka Majcen Le Marechal, Albert Robert, 1993, izvirni znanstveni članek Opis: The crystal and molecular structures of two reaction products of geminal dicyano oxiranes with thiohydantoione and thioxobenzoxazole have been determinated from ▫$Mo-K_\alpha$▫ X-ray diffraction data. The two reaction products were: 2H-2-(p-tolyl)-imidazol[1,2-b]thiazole-3,6-dione (compound I) and Z-3-benzoxazole-3-phenyl-2-oxo-2-propanenitrile (compound II) with the following crystal data at 293(1) K: Compound I, ▫$C_{12}H_{10}N_2O_2S$▫, monoclinic ▫$P2_1/c$▫, a=15057(3), b=5.200(3), c=14.724(4) Å, ▫$\beta=104.24(3)°$▫, Z=4; final R and ▫$R_w$▫ values were 0.034 and 0.049 for1647 observed reflexions. Compound II, ▫$C_{16}H{10}N_2O_2$▫, monoclinic, ▫$P2_1/n$▫, a=14.396(3), b=4.326(1), c=21.335(4) Å, ▫$\beta-107.79(1)°$▫, Z=4;final R and ▫$R_w$▫ values 0.040 and 0.053 for 1516 observed reflections.
Ključne besede: organic chemistry, crystal structure, chemical reactions, oxiranes, coordination compounds, structural chemistry
Objavljeno v DKUM: 05.07.2017; Ogledov: 1227; Prenosov: 92
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6. GOLJUFIJA NA ŠKODO EVROPSKIH SKUPNOSTIJure Blažič, 2010, diplomsko delo Opis: Kaznivo dejanje goljufije na škodo Evropskih skupnosti je Republika Slovenija v svoj pravni red uvedla z novim Kazenskim zakonikom, ki je v veljavi od 1. novembra 2008. S tem je izpolnila še zadnji del obveznosti, ki jih je sprejela s tem, ko je z zakonom ratificirala Konvencijo o zaščiti finančnih interesov Evropskih skupnosti, vključno z njenimi protokoli.
Na podlagi navedene konvencije so bili v nedavni preteklosti sprejeti številni praktični ukrepi v boju zoper goljufije, ki imajo za posledico oškodovanje proračunskih sredstev Evropske unije. Ustanovljen je bil Evropski urad za boj proti goljufijam — OLAF. V vseh državah članicah podpisnicah konvencije delujejo operativne službe AFCOS, ki sodelujejo s tem uradom.
Sprejetje in uveljavitev Lizbonske pogodbe, ki ustanavlja še tesnejšo zvezo med državami članicami, ponuja še dodatne ukrepe, ki se lahko sprejmejo na tem področju. Pravno urejanje na področju kazenskega prava bo mogoče tudi preko uredb in direktiv, kar bo olajšalo unifikacijo prava na tem področju. Prav tako je pomembna novost ustanovitev Evropskega javnega tožilstva, čigar naloga bo v prvi vrsti prav varovanje skupnih finančnih interesov.
Prav tako se v prihodnosti pričakuje uveljavitev t.i. Corpus Iurisa kazenskopravnih določb, ki bo prav tako urejal predmetno tematiko.
Z vsemi navedenimi ukrepi se nudijo realne možnosti za izgradnjo trdnega sistema javnih financ v okviru Evropske unije, to pa vodi k tesnejši nadnacionalni zvezi in k večjemu zaupanju evropskih državljanov v njene institucije.
Ključne besede: goljufija na škodo Evropskih skupnosti, proračun Evropske unije, Konvencija o zaščiti finančnih interesov Evropskih skupnosti, Evropski urad za boj proti goljufijam – OLAF, Anti-Fraud Coordination Service – AFCOS
Objavljeno v DKUM: 04.05.2010; Ogledov: 4230; Prenosov: 531
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