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Model transformations require formal semantics
Yu Sun, Zekai Demirezen, Tomaž Lukman, Marjan Mernik, Jeffrey G. Gray, 2008, objavljeni znanstveni prispevek na konferenci

Opis: Despite the increasing interest in model-driven engineering, there are many open issues that need to be addressed to advance the technology and promote its adoption. This position paper outlines several current limitations of model transformation, with a specific emphasis on model optimization. A primary shortcoming that can be found in many model transformation approaches and tools is the lack of formal semantics to define the meaning of a modeling abstraction. This inadequacy is the source of many problems surrounding the practice of model engineering.
Ključne besede: domain-specific languages, program transformation, model transformation, model-driven engineering, modeling language
Objavljeno: 31.05.2012; Ogledov: 1200; Prenosov: 27
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Heike M. A. Ehmann, 2012, doktorska disertacija

Opis: The goal of this thesis is the structuring of cellulose nanocrystals using different organofunctional silane compounds and different cationic species to prepare highly functional materials with tailored properties. In addition different new aspects and approaches for the structural characterization of functionalised cellulose nanocrystals (CNC) functionalised with different organofunctionalalkoxysilanes as well as cationic species have been introduced. Cellulose nanocrystals (CNC) are prepared using three different acidic conditions to hydrolyse microcrystalline cellulose (MCC). The sulphuric acid hydrolysis introduces highly negative charged sulphate groups on the CNC. The aqueous nanocrystalline cellulose suspensions (aNCS) are analysed in terms of ζ-potential related to the pH and concentration to investigate the stability while dynamic light scattering (DLS) is used to investigate the size distribution. The hydrochloric acid hydrolysis in contrast only removes the amorphous regions but the so obtained CNC are less stabilized (decreased ζ-potential) and tend to agglomerate very fast. The use of the mixture of both acids (HCl and H2SO4) during the hydrolysis of MCC introduces less sulphate groups compared with the sulphuric acid hydrolysis. AFM investigations show that the shapes of the CNC are highly influenced by the hydrolysis conditions. While the shape of the H2SO4 hydrolysed CNC is rod like, while the shape of the other two CNC samples is more spherical in nature. One of the major topic in this work is the analysis of aNCS in aqueous solutions by small angle x-ray scattering (SAXS). The use of the generalized indirect Fourier transformation (GIFT) method allows the analysis of these systems and structural properties such as shape, size and surface charge of aNCS can be assessed. Using this kind of characterisation it can be seen that the shape of the H2SO4 hydrolysed CNC is definitely rod like while the other CNC sample can be described with spheres. In addition to the aNCS characterisation different substrates (Si-wafer, glass slides, polystyrene, etc.) are equipped with aNCS using a variety of different deposition methods (e.g. spin coating, solution casting, dip coating). The resulting films are studied in terms of morphology AFM, SARFUS and SEM. Sophisticated scattering techniques are employed for surface structural characterisation as grazing incidence small angel x-ray scattering. The determination of surface free energies allows conclusions about the hydrophilicity and hydrophobicity as well as the interaction capacity with different liquids. It can be seen that besides the hydrophilic nature of the CNC also hydrophobic interactions are present. The highly negative charged CNC sample which was prepared using sulphuric acid hydrolysis is found to be best suitable for the further hybridization with different organofunctional silanes and for the layer by layer approach (LBL) with different cationic species. The organofunctionalalkoxysilanes which were used in this study can be divided into three groups (e.g filler, surface functionalisation silanes, cross linking silanes). Depending on the nature of the organic residue the silanes are capable to introduce functionalities with enhanced hydrophobic and olephobic properties. The surface energies are investigated using contact angle method, while the surface energies are calculated using three different model approaches (OWRK, Wu, Acid-Base). The most increased hydrophobic and oleophobic properties were measured for trimethylfluorophenylsilantriol (PFTEOS). The morphology of the coated silanes is investigated using SAFRUS technique. It can be seen that nearly all silanes can be coated as homogeneous films onto different substrates (Si-wafer, SURFs, glass slides) with different methods (spin coating, solution casting). The macroscopic appearance of solution casted silanes is investigated using optical microscopy. The differences of the structural nature of the so obtained coatings and detaching films were investigated...
Ključne besede: Cellulose nanocrystals, sol-gel chemistry, organofunctionalalkoxysilanes, hybrid materials, small angle x-ray scattering, generalized indirect Fourier Transformation, quartz crystal microbalance dissipation, surface free energy, surface functionalisation, layer by layer
Objavljeno: 28.11.2012; Ogledov: 1783; Prenosov: 117
.pdf Celotno besedilo (8,59 MB)

Nenad Vranešević, 2013, diplomsko delo

Opis: Vicenzo Natali’s movie Splice intertwines science fiction with real science and sends us a message of what are the possible consequences of misusing our knowledge we gain as we walk towards our future. This idea of what can happen when man plays god or uses science for his own devices, without the necessary morality and ethics, has been used and re-used many times. In my diploma paper I will explore the origins of the “Mad Scientist” theme and how Natali reworked the idea to fit it into the modern world. With it I will also show how deeply rooted and wide-spread this theme is, using other authors and works to illustrate my point. Additionally I will focus on another important theme in the movie, transformation. This theme has also been used many times before and has today transformed into many different variations; however, all of them still have the same foundations.
Ključne besede: Vicenzo Natali, Splice, mad scientist, Frankenstein, The Strange Case of Dr Jekyll and Mr Hyde, transformation, Dracula, evolution.
Objavljeno: 12.02.2013; Ogledov: 1181; Prenosov: 70
.pdf Celotno besedilo (1,06 MB)

Operation of the Albanian mafia in the Republic of Macedonia
Aleksandar Ilievski, Bojan Dobovšek, 2013, izvirni znanstveni članek

Opis: Purpose: Albanian mafia currently represents a threat to the entire Europe, while Macedonia, a country with a 25% Albanian minority, is one of the most threatened countries in Europe. In this article, we have elaborated in more detail the scope, vision and modus operandi of the Albanian mafia in human trafficking, illegal arms and drug trade in Europe, especially in Macedonia, a country that is considered one of the home countries of the Albanian mafia. The aim is to explain the transformation of the National liberation army (NLA) into Democratic Union for Integration (DUI) and investigate underlying interconnection between the NLA with the Albanian mafia. Design/Methods/Approach: The methods employed include analysis of existing literature along with previously published interviews, certain statistical data, as well as opinions of people who have been interviewed in person due to their extensive experience in the fight against organized crime in Macedonia. Findings: During the research, the actual condition regarding the impact of the Albanian mafia in Macedonia has been investigated, and it was concluded that, both in Macedonia and throughout Europe, there was a need for more rigorous treatment of the strategy how to deal with the mafia. The thesis that the NLA has direct links with the Albanian mafia has been proven. Research limitations / implications: The main focus was on the progress of its activities in Macedonia, although the Albanian mafia operates on a far larger territory. Practical implications: This research emphasizes the actual state of operation of the Albanian mafia in several aspects, and provide a brief insight into their vision for the future. In addition, it could help significantly into the improvement of safety measures against the mafia's criminal activities. Originality/Value: Due to the fact that any research regarding the operations of the Albanian mafia in Macedonia is crucial for the security in the region, there is hardly any made in this field.
Ključne besede: Albanian mafia, National Liberation Army (NLA), Democratic Union for Integration (DUI), Big Albania, transformation, Macedonia
Objavljeno: 10.07.2015; Ogledov: 762; Prenosov: 80
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On a connection between the VAK, knot theory and El Naschie's theory of the mass spectrum of the high energy elementary particles
Leila Marek-Crnjac, 2004, izvirni znanstveni članek

Opis: Uvedemo teorijo Cantorjevega prostor-časa. V tej teoriji je vsak delec možno interpretirati kot razcep nekega drugega. Nekateri delci so razcepni s protonom in so izraženi s ▫$phioverline{alpha_0}$▫. Če sledimo idejam El Naschieja so limitne množice Kleinove grupe Cantorjeve množice, s Haussdorffovo dimenzijo ▫$phi$▫ ali ▫$frac{1}{phi}, frac{1}{phi^2}, frac{1}{phi^3}...$▫ Z uporabo E-neskončne teorije je masni spekter elementarnih delcev, kot funkcija zlatega reza, v limitni množici Mobius-Kleinove geometrije kvantnega prostor-časa, kot je bilo obravnavano pri Dattu.
Ključne besede: E-neskončna teorija, Hausdorffova dimenzija, Cantorjeva množica, Mobius-Kleinova transformacija, E-infinity theory, Haussdorff dimension, Cantor set, Mobius-Klein transformation
Objavljeno: 10.07.2015; Ogledov: 544; Prenosov: 66
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On a connection between the limit set of the Möbius-Klein transformation, periodic continued fractions, El Naschie's topological theory of high energy particle physics and the possibility of a new axion-like particle
Leila Marek-Crnjac, 2004, izvirni znanstveni članek

Opis: Najprej razvijemo iracionalna števila, na primer ▫$frac{1}{phi}, frac{1}{phi^2}, frac{1}{phi^3}...$▫, v periodične verižne ulomke. Vsako iracionalno število lahko razvijemo v verižni ulomek. Limitna množica Kleinove transformacije, ki deluje na E-neskončno Cantorjevem prostor-času je množica periodičnih verižnih ulomkov, vakuum tega E-neskončno prostora je opisan s to množico. Kot je bilo opisano pri El Naschieju je vsak delec možno geometrijsko interpretirati kot razcep drugega. To je bilo napravljeno z uporabo topologije hiperboličnega Kleinovega prostora VAK-a, ki je pravzaprav naša limitna množica. Predstavimo tudi razmerja teoretičnih mas nekaterih elementarnih delcev z nekaterimi izbranimi delci. Mnoge mase so blizu celoštevilskih večkratnikov nekaterih izbranih mas delcev. Na koncu obravnavamo možnost novega delca, ki je podoben axionom in je bil že omenjen pri Kraussu in El Naschieju.
Ključne besede: Kleinian transformation, Fibonaccijevo zaporedje, verižni ulomek, aksion, Klenian transformacija, Fibonacci sequence, continued fraction, axion
Objavljeno: 10.07.2015; Ogledov: 451; Prenosov: 67
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Periodic continued fraction representations of different quark's mass ratios
Leila Marek-Crnjac, 2005, izvirni znanstveni članek

Opis: Najprej zapišemo nekaj izrekov o verižnih ulomkih. Kot je bilo dokazano v (Chaos, Solitons and Fractals 2004; 21; 9-19) je limitna množica Kleinove transformacije, ki deluje na E-neskončno Cantorjevem prostoru, množica periodičnih verižnih ulomkov. Razvijemo vsa razmerja kvarkovih mas v periodične verižne ulomke in (po Chaos, Solitons and Fractals 2004; 22; 749-752) ugotovimo, da nihajo kot poligonska črta.
Ključne besede: matematika, E-neskončna teorija, masa kvarka, Kleinova transformacija, periodični verižni ulomek, mathematics, E-infinity theory, quark mass, Kleinian transformation, periodic continued fraction
Objavljeno: 10.07.2015; Ogledov: 548; Prenosov: 69
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Comparison of NiTi orthodontic archwires and a determination of the charasteristic properties
Janko Ferčec, Matija Kos, Mihael Brunčko, Ivan Anžel, Branislav Glišić, Evgenija Marković, Rebeka Rudolf, 2014, izvirni znanstveni članek

Opis: The aim of this paper was to analyse the characteristic properties of six different, commercially available nickel-titaniumorthodontic wires with a diameter of 0.305 mm (0.014"). The characteristic properties were determined by usingsemi-quantitative EDX analyses, DSC analyses for a determination of the phase temperatures, and a tensile test to obtain themechanical properties of the wires. The investigation of the chemical composition showed an equiatomic NiTi alloy. Analysesof phase temperatures showed that the nickel-titanium orthodontic wires were, in an austenitic microstructure, exhibiting asuperelastic effect in the oral environment. The uniaxial tensile stressstrain curves showed different values for the beginningand the end of the transformation range during the loading.
Ključne besede: shape-memory alloy, phase transformation, thermal analysis, tensile test
Objavljeno: 21.12.2015; Ogledov: 628; Prenosov: 61
.pdf Celotno besedilo (429,57 KB)
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