1. Interplay between particle trapping and heterogeneity in anomalous diffusionHaroldo V. Ribeiro, Angel A. Tateishi, Ervin K. Lenzi, Richard L. Magin, Matjaž Perc, 2023, izvirni znanstveni članek Opis: Heterogeneous media diffusion is often described using position-dependent diffusion coefficients and estimated indirectly through mean squared displacement in experiments. This approach may overlook other mechanisms and their interaction with position-dependent diffusion, potentially leading to erroneous conclusions. Here, we introduce a hybrid diffusion model that merges a position-dependent diffusion coefficient with the trapping mechanism of the comb model. We derive exact solutions for position distributions and mean squared displacements, validated through simulations of Langevin equations. Our model shows that the trapping mechanism attenuates the impact of media heterogeneity. Superdiffusion occurs when the position-dependent coefficient increases superlinearly, while subdiffusion occurs for sublinear and inverse power-law relations. This nontrivial interplay between heterogeneity and state-independent mechanisms also leads to anomalous yet Brownian, and non-Brownian yet Gaussian regimes. These findings emphasize the need for cautious interpretations of experiments and highlight the limitations of relying solely on mean squared displacements or position distributions for diffusion characterization.
Ključne besede: particle trapping, heterogeneity, diffusion, statistical physics
Objavljeno v DKUM: 11.09.2024; Ogledov: 38; Prenosov: 4
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2. Kolmogorov compression complexity may differentiate different schools of Orthodox iconographyDaniel Peptenatu, Ion Andronache, Helmut Ahammer, Richard Taylor, Ioannis Liritzis, Marko Radulovic, Bogdan Ciobanu, Marin Burcea, Matjaž Perc, Tuan D. Pham, 2022, izvirni znanstveni članek Opis: The complexity in the styles of 1200 Byzantine icons painted between 13th and 16th from Greece, Russia and Romania was investigated through the Kolmogorov algorithmic information theory. The aim was to identify specific quantitative patterns which define the key characteristics of the three different painting schools. Our novel approach using the artificial surface images generated with Inverse FFT and the Midpoint Displacement (MD) algorithms, was validated by comparison of results with eight fractal and non-fractal indices. From the analyzes performed, normalized Kolmogorov compression complexity (KC) proved to be the best solution because it had the best complexity pattern differentiations, is not sensitive to the image size and the least affected by noise. We conclude that normalized KC methodology does offer capability to differentiate the icons within a School and amongst the three Schools.
Ključne besede: iconography, complexity, Kolmogorov compression, art, physics
Objavljeno v DKUM: 15.07.2024; Ogledov: 117; Prenosov: 9
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3. Napovedniki antitrombotične terapije pri ambulantnih bolnikih s kronično atrijsko fibrilacijo, ki odstopa od smernic zdravljenjaReinhild Bücheler, Christoph Meisner, Ruth Bösel, Richard Fux, Christine Jägle, Lusine Danielyan, Katrin Schwarz, Christoph H. Gleiter, Klaus Mörike, 2009, strokovni članek Ključne besede: atrijska fibrilacija, antitrombotično zdravljenje, smernice
Objavljeno v DKUM: 19.04.2024; Ogledov: 135; Prenosov: 2
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4. Resident perceptions and responses to tourism : individual vs community level impactsTina Šegota, Tanja Mihalič, Richard R. Perdue, 2022, izvirni znanstveni članek Opis: This paper reviews resident tourism attitude research through the lens of the individual- and community-level perceived impacts of and responses to tourism. It explores how perceived impacts of tourism and responses to tourism development have been conceptualised and measured in the existing resident attitudes models published between 1990 and 2020. Three categories of variables were identified and used: antecedent variables, tourism impact variables, and dependent variables. The latter three categories are used to discuss the research topic from the lenses of improvements in measurement instruments. Finally, the paper suggests rethinking the overall conceptualisation of residents’ perceptions of and reactions to tourism – it proposes future research directions to distinguish between individual-level and community-level effects and reactions.
Ključne besede: resident attitudes, support for tourism, tourism impact, personal benefit, host community, literature review
Objavljeno v DKUM: 18.01.2024; Ogledov: 316; Prenosov: 18
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6. The surgical treatment of osteoarthritisPeter Brumat, Samo Novak, Matevž Topolovec, Rihard Trebše, 2022, pregledni znanstveni članek Opis: Osteoarthritis is a degenerative condition affecting the whole joint with the underlying bone, representing a major source of pain, disability, and socioeconomic cost worldwide. Age is considered the strongest risk factor, albeit abnormal biomechanics, morphology, congenital abnormality, deformity, malalignment, limb-length discrepancy, lifestyle, and injury may further increase the risk of the development and progression of osteoarthritis as well. Pain and loss of function are the main clinical features that lead to treatment. Although early manifestations of osteoarthritis are amenable to lifestyle modification, adequate pain management, and physical therapy, disease advancement frequently requires surgical treatment. The symptomatic progression of osteoarthritis with radiographical confirmation can be addressed either with arthroscopic interventions, (joint) preservation techniques, or bone fusion procedures, whereas (joint) replacement is preferentially reserved for severe and end-stage disease. The surgical treatment aims at alleviating pain and disability while restoring native biomechanics. Miscellaneous surgical techniques for addressing osteoarthritis exist. Advanced computer-integrated surgical concepts allow for patient personalization and optimization of surgical treatment. The scope of this article is to present an overview of the fundamentals of conventional surgical treatment options for osteoarthritis of the human skeleton, with emphasis on arthroscopy, preservation, arthrodesis, and replacement. Contemporary computer-assisted orthopaedic surgery concepts are further elucidated.
Ključne besede: osteoarthritis, spine, hip, knee, ankle and foot, shoulder, elbow, wrist and hand, computer-assisted orthopaedic surgery, CAOS
Objavljeno v DKUM: 22.08.2023; Ogledov: 401; Prenosov: 64
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7. The online communication of corporate social responsibility in subsidiaries of multinational companies in HungaryRichard Szanto, 2018, pregledni znanstveni članek Opis: Background and Purpose: Many studies have explored the differences in the management of corporate social responsibility (CSR) of multinational companies across the globe. The main question of the study was, are there differences between CSR practices between home country and host country operations?
Design/Methodology/Approach: This study investigates the differences in online CSR communication between global corporate websites and the webpages of local subsidiaries in Hungary. The sample contains 70 multinational companies (MNCs) and their Hungarian subsidiaries. All the subsidiaries of the sample are listed amongst the largest 200 companies (based on turnover) in Hungary. Both the local (Hungarian) and the global internet sites of these MNCs were visited, and pre-defined categories were sought on the corporate websites. The presence/lack of these CSR themes and topics on the websites were recorded.
Results: The findings show that online CSR disclosure of the subsidiaries is usually more limited than the global communication. Moreover, distance from the headquarters seems to matter, the farther the headquarters of the MNC is located, the narrower CSR presence on the websites of the local subsidiary can be observed.
Conclusion: The paper’s main contribution is to deepen our knowledge about the CSR strategies of the multinational companies across their operations. It was confirmed that their CSR practices significantly differ between the host and home countries.
Ključne besede: Madžarska, multinacionalne družbe, družbena odgovornost, komuniciranje, svetovni splet
Objavljeno v DKUM: 10.10.2018; Ogledov: 1457; Prenosov: 330
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8. The Ebola epidemic and cholera outbreak and the international responseRichard B. Roberts, 2017, pregledni znanstveni članek Opis: Infectious diseases are responsible for 15 million of the 57 million deaths worldwide despite the remarkable discoveries of antibiotics and vaccines. Many individuals succumb to microbial diseases in poor and less-developed countries where these preventive and therapeutic modalities are not available. Furthermore these less fortunate countries do not have the resources or public health infrastructure to combat unforeseen and explosive outbreaks. Two relatively recent outbreaks are reviewed in this article; the Ebola epidemic in West Africa and the cholera outbreak in Haiti. This outbreak of cholera, in a country of only 7.8 million inhabitants, is one of the largest ever recorded worldwide. Early intervention by international health organizations is critical to curtail and ultimately control infectious disease outbreaks and epidemics. This responsibility, especially for less-developed countries, lies in the hands of the United Nations and World Health Organization. Unfortunately, the international response from the UN and WHO was slow, cumbersome and poorly coordinated both in West Africa and Haiti.
Ključne besede: Ebola, cholera, international response, United Nations, World Health Organization
Objavljeno v DKUM: 09.10.2018; Ogledov: 2039; Prenosov: 192
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9. Between cultural and natural heritage : pluralism in planning tourism products for rescuingRichard Ingwe, 2014, izvirni znanstveni članek Opis: The planning of tourism products in the north-central Cross River State (corresponding to ‘old Ogoja province) is examined in this study. Explained in the article are: justification of the need for undertaking community-based tourism development strategy as a means of reducing inter- regional disparity in development aroused by historical discrimination against the region through eras of Trans-Atlantic Slave Trade, colonialism, and successive post-independent governments; creation of special development funds aimed at addressing challenges posed by personalization of government thereby creating governance deficits; and descriptions of the tourism potentials/resources of the north-central Cross River State. Rather than adopting the advice of tourism experts in the 1960s that African countries ought to prefer to design cultural-heritage tourism products aiming towards attracting some 145 million tourists from the United States of America (USA) who might be satiated with natural heritage tourism products offered back home. Here, it is argued here that considering myriad socio-economic-political dynamics thereafter – including anti-African/Nigerian political measures such as barring US citizens from visiting Nigeria or parts of it- there is no need concentrating on such restricted tourism products. This is justified by the fact that with nearly 170 million population –most of whom are expecting to move from poverty towards the middle class among other prosperous economic statuses and who do not need to immediately access foreign natural heritage tourism, there is need for north- central Cross River State –a region possessing diverse tourism resources to plan tourism products that seek to integrate natural heritage with the cultural varieties in order to properly capture both local and foreign tourists. Foreign tourists here covers a larger spectrum beyond US visitors including visitors from large and increasing number of member states of the United Nations.
Ključne besede: Nigeria, natural heritage, cultural heritage, tourism, planning
Objavljeno v DKUM: 16.04.2018; Ogledov: 1724; Prenosov: 106
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10. Urbanisation, urban environmental quality, national socio-economic conditions and diseases burden in Africa : a research agenda for spatio-temporal analyses of subregional characteristicsRichard Ingwe, 2013, izvirni znanstveni članek Opis: The investigation of socio-economic, political and environmental aspects of urbanization in Africa is gaining research attention. Most recently, information on the patterns in urbanization, population growth, slumisation, among other aspects of urban Africa within the past quarter of a century or thereabout were reported. While this report elucidated on the relevant challenges, it was restricted to the regional patterns of the variables investigated. This report indicates that more information on the sub-regional aspects of these variables is required to elucidate on urban planning in the region and its sub-regions. Here, the ways forward in investigating these issues and variables underlying them are outlined. The theoretical, methodological, spatial and temporal aspects or requirements of the proposed research are discussed to provide a compass for future research.
Ključne besede: urbanization, population dynamics, Africa, sub-regions, socio-economic conditions, environment, theory, method, slumisation
Objavljeno v DKUM: 10.04.2018; Ogledov: 1411; Prenosov: 97
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