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1.
UVEDBA CENTRALNEGA UPRAVLJANJA INFORMACIJSKIH SISTEMOV NA ZAVODU RTV SLOVENIJA
Gorazd Zakrajšek, 2010, diplomsko delo

Opis: Na RTV Slovenija je trenutno v uporabi strežniški sistem, ki temelji na Windows 2008 in platformi Exchange 2007. V domeni je 2500 uporabnikov z različnimi operacijskimi sistemi (Windows 2000, Windows XP in majhen delež Windows 7). Raznolikost okolja narekuje potrebo po uvedbi centralnega sistema za nadzor in distribucijo popravkov, popis strojne in programske opreme, distribucijo programske opreme ter avtomatizirano namestitev operacijskih sistemov. Z implementacijo orodja Microsoft System Center Configuration Manager Server (ConfigMgr) 2007 v okolje RTV Slovenija lahko zagotovimo večjo skladnost IT-okolja z zahtevami uporabnikov in poslovanja ter s tem izboljšajmo njegovo učinkovitost, razpoložljivost in varnost. Orodje System Center Configuration Manager je grajeno na ključnih Microsoftovih tehnologijah, kot so Microsoft Windows Server Update Services (WSUS), Windows Server Active Directory (AD), in Windows arhitekturi. Vse te tehnologije so že bile predhodno nameščene v okolje RTV Slovenija.
Ključne besede: ConfigMgr: System CenterConfiguration Manager 2007, MP: SMS Management Point, RP: SMS Reporting Point, DP: SMS Distribution Point
Objavljeno: 24.01.2011; Ogledov: 1793; Prenosov: 72
.pdf Celotno besedilo (2,25 MB)

2.
Evaluation of Green`s function for vertical point-load excitation applied to the surface of a semi-infinite elastic medium
Andrej Štrukelj, Tomaž Pliberšek, Andrej Umek, 2006, izvirni znanstveni članek

Opis: The topic of this paper is to show that the integrals of infinite extent representing the surface displacements of a layered half-space loaded by a harmonic, vertical point load can be reduced to integrals with finite integration range. The displacements are first expressed through wave potentials and the Hankel integral transform in the radial coordinate is applied to the governing equations and boundary conditions, leading to the solutions in the transformed domain. After the application of the inverse Hankel transform it is shown that the inversion integrands are symmetric/antimetric in the transformation parameter and that this characteristic is preserved for any number of layers. Based on this fact the infinite inversion integrals are reduced to integrals with finite range by choosing the suitable representation of the Bessel function and use of the fundamental rules of contour integration, permitting simpler analytical or numerical evaluation. A numerical example is presented and the results are compared to those obtained by the CLASSI program.
Ključne besede: civil engineering, soil mechanics, Green`s function, layered half-space, vertical point load
Objavljeno: 31.05.2012; Ogledov: 1421; Prenosov: 8
URL Povezava na celotno besedilo

3.
Phase equilibria of vanillins in compressed gases
Željko Knez, Mojca Škerget, Amra Perva-Uzunalić, 2007, izvirni znanstveni članek

Opis: Solid-liquid phase transitions of vanillin, ethylvanillin, o-vanillin and o-ethylvanillin in compressed hydrocarbons (isobutane and propane), fluorinated hydrocarbons (R23, R134a and R236fa) and sulphur hexafluoride (SF6) were determined with a modified capillary method in a pressure range between 0.1 and 31.0 MPa. Equilibrium solubilities of vanillins in compressed fluorinated hydrocarbons were determined at temperatures 313.2 and 333.2 K and over a pressure range between 1.1 and 26.0 MPa with a static-analytic method. Experimental solubility data were correlated by a density-based Chrastil model. Results showed that phase equilibria of vanillins in investigated compressed gases are influenced by the type of alchoxy group (methoxy or ethoxy) and the position of OH group (ortho or para), bound to the aromatic ring of solute, as well as the molecular structure of the gas. Three phase SLG curves in p,T-projections mainly exhibited temperature minimums and negative slopes dp/dT, with a maximum melting point depression between 9 and 21 K; all systems with SF6 exhibited a continuous positive slope dp/dT of approximately 4.5 MPa/K. SLG curves with a temperature maximum at low pressure were observed for systems of o-vanillins with R23. Solubilities of o-vanillins in R23 and R236fa were higher in comparison with p-vanillins, whereas, in the case of R134a, the solubilities were influenced by the alchoxy group bound on aromatic ring: vanillin and o-vanillin with methoxy group are more soluble than vanillins with ethoxy group (ethylvanillin and o-ethylvanillin). The highest solubility of all four vanillins was observed in R236fa.
Ključne besede: solid-liquid-gas equilibria, melting point depression, solubility, vanilin isomers, hydrocarbons, fluorinated hydrocarbons, SF6
Objavljeno: 31.05.2012; Ogledov: 1047; Prenosov: 42
URL Povezava na celotno besedilo

4.
Projektna spletna shramba - orodje za projektno sodelovanje
Andrej Knuplež, Marina Svečko, Rajko Svečko, 2012, objavljeni znanstveni prispevek na konferenci

Opis: V prispevku so opisane storitve, ki jih ponuja platforma Microsoft Windows SharePoint Services 3.0 kot orodje za izdelavo spletne aplikacije, ki omogoča povezovanje udeležencev pri projektnem delu. Na osnovi opisane tehnologije je bil kot vzorčni primer zgrajen spletni portal za sodelovanje in izmenjavo podatkov med udeleženci v nekaterih projektih e-Twinning. V članku so v nadaljevanju opisane zgradba, uporabniški vmesnik in funkcionalnosti zgrajenega portala. Del vsebine je namenjen tudi varnosti, ki predstavlja pomemben faktor pri zagotavljanju nemotenega dela na portalu. Na koncu so podane smernice za nadaljevanje dela na projektu, ki bo doprinesla k še boljšemu delovnemu okolju.
Ključne besede: Share Point, spletne aplikacije, projektno sodelovanje, uporabniški vmesniki
Objavljeno: 01.06.2012; Ogledov: 1411; Prenosov: 49
URL Povezava na celotno besedilo

5.
Identification of critical points for the design and synthesis of flexible processes
Zorka Novak-Pintarič, Zdravko Kravanja, 2008, izvirni znanstveni članek

Opis: Optimization problems for the design and synthesis of flexible chemical processes are often associated with highly discretized models. The ultimate goal of this work is to significantly reduce the set of uncertain parameter points used in these problems. To accomplish the task, an approach was developed for identifying the minimum set of critical points needed for flexible design. Critical points in this work represent those values of uncertain parameters that determine optimal overdesign of process, so that feasible operation is assured within the specified domain of uncertain parameters. The proposed approach identifies critical values of uncertain parameters a-priori by the separate maximization of each design variable, together with simultaneous optimization of the economic objective function. During this procedure, uncertain parameters are transformed into continuous variables. Three alternative methods are proposed within this approach: the formulation based on Karush-Kuhn-Tucker (KKT) optimality conditions, the iterative two-level method, and the approximate one-level method. The identified critical points are then used for the discretization of infinite uncertain problems, in order to obtain the design with the optimum objective function and flexibility index at unity. All three methods can identify vertex or even nonvertex critical points, whose total number is less than or equal to the number of design variables, which represents a significant reduction in the problem's dimensionality. Some examples are presented illustrating the applicability and efficiency of the proposed approach, as well as the role of the critical points in the optimization of design problems under uncertainty.
Ključne besede: chemical processing, process synthesis, flexibility, design, critical point, vertex, nonvertex
Objavljeno: 01.06.2012; Ogledov: 1016; Prenosov: 51
URL Povezava na celotno besedilo

6.
ACTLW - an action-based computation tree logic with unless operator
Robert Meolic, Tatjana Kapus, Zmago Brezočnik, 2008, izvirni znanstveni članek

Opis: Model checkers for systems represented by labelled transition systems are not as extensively used as those for systems represented by Kripke structures. This is partially due to the lack of an elegant formal language for property specification which would not be as raw as, for example, HML yet also not as complex as, for example, -calculus. This paper proposes a new action-based propositional branching-time temporal logic ACTLW, which enhances popular computation tree logic (CTL) with the notion of actions in a similar but more comprehensive way than action-based CTL introduced by De Nicola and Vaandrager [R. De Nicola, F.W. Vaandrager, Action versus logics for transition systems, in: Semantics of Systems of Concurrent Processes, Proceedings LITP Spring School on Theoretical Computer Science, LNCS 469, 1990, pp. 407-419]. ACTLW is defined by using temporal operators until and unless only, whereas all other temporal operators are derived from them. Fixed-point characterisation of the operators together with symbolic algorithms for globalmodel checking are shown. Usage of this new logic is illustrated by an example of verification of mutual-exclusion algorithms.
Ključne besede: formal verification, model checking, action-based temporal logic, fixed point, mutual-exclusion algorithm
Objavljeno: 01.06.2012; Ogledov: 1302; Prenosov: 56
URL Povezava na celotno besedilo

7.
Symmetry preserving algorithm for large displacement frictionless contact by the pre-discretization penalty method
Dušan Gabriel, Jiři Plešek, Miran Ulbin, 2004, izvirni znanstveni članek

Opis: A three-dimensional contact algorithm based on the pre-discretization penalty method is presented. Using the pre-discretization formulation gives rise to contact searching performed at the surface Gaussian integration points. It is shown that the proposed method is consistent with the continuum formulation ofthe problem and allows an easy incorporation of higher-order elements with midside nodes to the analysis. Moreover, a symmetric treatment of mutually contacting surfaces is preserved even under large displacement increments. Theproposed algorithm utilizes the BFGS method modified for constrained non-linear systems. The effectiveness of quadratic isoparametric elements in contact analysis is tested in terms of numerical examples verified by analytical solutions and experimental measurements. The symmetry of the algorithm is clearly manifested in the problem of impact of two elastic cylinders.
Ključne besede: mechanics, numerical methods, contacting surfaces, contact problems, 3D contact algorithm, discretization, higher order elements, finite element method, Gauss point search, pre-discretization penalty method
Objavljeno: 01.06.2012; Ogledov: 1458; Prenosov: 37
URL Povezava na celotno besedilo

8.
Annihilation of defects in liquid crystals
Milan Svetec, Milan Ambrožič, Samo Kralj, 2007, objavljeni znanstveni prispevek na konferenci

Opis: The annihilation of defect is studied theoretically in liquid crystals (LCs). We consider the annihilation of point disclinations in nematic and line edge dislocations in smectic A LC phase, respectively. We stres s qualitative similarities in these processes. The whole annihilation regime is taken into account, consisting of the pre-collision, collision, and post-collision stage.
Ključne besede: physics, liquid crystals, annihilation, defects, point defects, point disclinations, edge dislocations
Objavljeno: 07.06.2012; Ogledov: 698; Prenosov: 48
URL Povezava na celotno besedilo

9.
Automated landmark points detection by using a mixture of approaches
Božidar Potočnik, 2015, izvirni znanstveni članek

Opis: This paper deals with the automated detection of a closed curvećs dominant points. We treat a curve as a 1-D function of the arc length. The problem of detecting dominant points is translated into seeking the extrema of the corresponding 1-D function. Three approaches for automated dominant points detection are presented: (1) an approach based on fitting polynomial, (2) an approach using 1-D computer registration and (3) an innovative approach based on a multi-resolution scheme, zero-crossing and hierarchical clustering. Afterwards, two methods are introduced based on the linearly and non-linearly mixing the results from the three approaches. We then mix the results in a mean-square error sense by using the linear and non-linear fittings, respectively. We experimentally demonstrate the problem of detecting 21 landmarks on 38 vole-teeth that by mixing, the detection accuracy is improved by up to 41.47 % with respect to the results for individual approaches, as applied within the mixture.
Ključne besede: closed curve, dominant point, landmark, automated detection, mixing model fitting, vole-tooth
Objavljeno: 10.07.2015; Ogledov: 540; Prenosov: 7
URL Povezava na celotno besedilo

10.
Extensions of the notion of extreme point
Gorazd Lešnjak, 1990, izvirni znanstveni članek

Opis: Vpeljemo pojme ▫$nr$▫-ekstremne, ▫$nc$▫-ekstremne in ▫$n$▫-ekstremne točke enotske sfere v normiranem prostoru. Banachovi prostori, v katerih so vse točke enotske sfere ▫$nc$▫-ekstremne, so natanko tisti, v katerih velja za analitične funkcije posplošitev krepke oblike izreka o maksimu absolutne vrednosti. Dokazanih je nekaj rezultatov o posplošeni strogi konveksnosti in gladkosti, ki so podobni znani dualnosti med običajno strogo konveksnostjo in gladkostjo. Članek obravnava tudi odnose med posplošeno gladkostjo in šibko diferenciabilnostjo norme.
Ključne besede: matematika, funkcionalna analiza, Ekstremna točka, kompleksna ekstremna točka, stroga konveksnost, gladkost, šibka diferenciabilnost norme, analitične funkcije, mathematics, functional analysis, extreme point, complex extreme point, rotundity, smoothness, weak differentiability of norm, analytic functions
Objavljeno: 10.07.2015; Ogledov: 496; Prenosov: 16
URL Povezava na celotno besedilo

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