Iskanje po katalogu digitalne knjižnice

Opis: Generalized global symmetries are a common feature of many quantum field theories decoupled from gravity. By contrast, in quantum gravity/the Swampland program, it is widely expected that all global symmetries are either gauged or broken, and this breaking is in turn related to the expected completeness of the spectrum of charged states in quantum gravity. We investigate the fate of such symmetries in the context of 7D and 5D vacua realized by compact Calabi-Yau spaces with localized singularities in M theory. We explicitly show how gravitational backgrounds support additional dynamical degrees of freedom which trivialize (i.e., “break”) the higher symmetries of the local geometric models. Local compatibility conditions across these different sectors lead to gluing conditions for gauging higher-form and (in the 5D case) higher-group symmetries. This also leads to a preferred global structure of the gauge group and higher-form gauge symmetries. In cases based on a genus-one fibered Calabi-Yau space, we also get an F-theory model in one higher dimension with corresponding constraints on the global form of the gauge group.
Ključne besede: quantum gravity, 5D case, F-theory model
Objavljeno v DKUM: 11.11.2025; Ogledov: 0; Prenosov: 0
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Opis: Podjetja za ocenjevanje uspešnosti poslovanja uporabljajo finančno analizo, ki temelji na podatkih iz računovodskih izkazov. Ta je ključna za razumevanje preteklega in sedanjega poslovanja podjetja ter za napovedovanje njegove prihodnosti. S pomočjo finančne analize lahko prepoznamo prednosti in slabosti podjetja, vodstvu pa omogoča sprejemanje premišljenih poslovnih odločitev, ki so ključne za obstoj, rast in nadaljnji razvoj podjetja. Med drugim omogoča zgodnje odkrivanje finančnih težav, ki so lahko notranjega (internega) ali zunanjega (eksternega) izvora, kar lahko posledično vodi v morebitno krizo v podjetju. Finančna analiza omogoča vpogled v finančno zdravje podjetja, ki predstavlja celovito merilo njegovega poslovanja, kot so likvidnost, solventnost, donosnost in učinkovitost. Finančno zdravje podjetja ocenjujemo z uporabo finančnih kazalnikov in modelov, kot sta Altmanov model in Kraličkova metoda (MDA). V magistrskem delu se osredotočamo na primerjalno analizo finančnega zdravja izbranih podjetij. Obravnavamo tri podjetja, ki delujejo v okviru telekomunikacijske dejavnosti (SKD: 61.100), in sicer: A1 Slovenija, d. d., Telekom Slovenije, d. d., in Telemach Slovenije, d. o. o. Analiza je omejena na petletno obdobje (2019–2023). Na podlagi izračunanih kazalnikov in modelov smo ugotovili, da je finančno zdravje vseh treh podjetij v opazovanem obdobju mogoče oceniti kot zmerno. K temu so odločilno prispevali rezultati Altmanovega modela, saj so pridobljene vrednosti Z v večini pod 1,81, kar nakazuje, da so podjetja v resnih težavah, kjer obstaja povečano tveganje stečaja.
Ključne besede: Altmanov model, finančna analiza, finančni kazalniki, finančno zdravje
Objavljeno v DKUM: 06.11.2025; Ogledov: 0; Prenosov: 6
Celotno besedilo (2,72 MB)

Opis: This study investigated the impact of information systems (IS) success on Project Success (PS) within hybrid and remote work environments, drawing empirical evidence from the world's largest consulting firm. By integrating the DeLone and McLean IS success model with established PS frameworks, the research examined how IS components—system quality, user satisfaction, and use/ intent to use—influence key PS dimensions: project management success, impact on the team, impact on the customer, and project investment success. Data from 198 employees were analyzed using structural equation modeling, confirming all hypothesized relationships. Results revealed that IS net benefits significantly enhance PS across all dimensions, while system quality and user satisfaction further drive IS effectiveness. The study underscores the critical role of robust digital infrastructure in optimizing project outcomes, offering theoretical insights and practical recommendations for organizations navigating hybrid work models. Limitations and future research directions are also discussed.
Ključne besede: hybrid work environment, DeLone and McLean model, structural equation modeling, remote work, digital transformation, system quality, user satisfaction, net benefits, project management
Objavljeno v DKUM: 03.11.2025; Ogledov: 0; Prenosov: 6
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Opis: This paper presents a novel approach for modeling non-Fourier dual-phase-lag bioheat transfer in multilayer biological tissue, aimed at simulating dynamic thermography for the early detection of skin tumors at Clark II and IV stages. The proposed algorithm, based on the boundary element method, enables the assignment of distinct thermophysical properties and non-Fourier relaxation time parameters to each tissue layer, thereby enhancing the realism of bioheat transfer modeling. Results show that accounting for non-Fourier effects significantly impacts the transient thermal contrast between tumor and healthy skin, particularly in Clark IV tumors and at higher relaxation times. These findings support the development of more accurate and physiologically realistic models of heat transfer in complex biological structures, and advance the application of dynamic thermography in early skin tumor detection and the diagnosis of other dermatological conditions.
Ključne besede: numerical modeling, non-Fourier heat transfer, bioheat transfer, dual-phase-lag model, boundary element method, dynamic thermography
Objavljeno v DKUM: 03.11.2025; Ogledov: 0; Prenosov: 5
Celotno besedilo (2,84 MB)
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Opis: This thesis explores how art exhibitions and cultural events held in hotel lobbies can become a successful business model. The concept combines hospitality and cultural tourism to create unique experiences for hotel guests while generating financial benefits for hotels. The study applies the Business Model Canvas (Osterwalder and Pigneur, 2010) to develop a clear business plan, which analyses customer segments, value propositions, revenue streams, and cost structures. The primary customers are hotels and tourists. Hotels benefit from increased guest loyalty and additional revenues, while tourists enjoy a richer cultural experience. A financial comparison of two event formats shows that both can be profitable. A small setup model has a higher profit margin (27.06%), while a medium setup model with a lower profit margin (19.24%) offers a broader range of services. Interviews with hotel managers, artists, and tourism experts confirm strong interest in these events highlighting, however, marketing, logistics and budgeting challenges. The thesis concludes that incorporation of cultural events into hotel services attracts more guests, strengthens hotel branding, and supports local artists making it a promising business opportunity.
Ključne besede: Cultural Tourism, Hotels and Hospitality, Business Model Canvas, Art Exhibitions, Event Planning
Objavljeno v DKUM: 27.10.2025; Ogledov: 0; Prenosov: 3
Celotno besedilo (1,57 MB)