1. Platformization in Tourism : Typology of Business Models, Evolution of Market Concentration and European Regulation ResponsesMaja Turnšek, Vladimir Radivojević, 2025, original scientific article Abstract: The paper serves to discuss the evolution of platform business models in tourism, the dynamics of market concentration, and regulatory interventions. We present the historical timeline of digitalization in tourism distribution models, starting from the Global Distribution Systems (GDS), and continuing with Online Travel Agencies (OTAs) and their market concentration in the duopoly of Expedia Group versus Booking Holdings Group. We continue to discuss the slow, yet uncertain, breaking of the global duopoly in the travel platforms market. On the one hand, the duopoly is challenged from the “bottom up”, where Airbnb is the most successful example, riding on the wave of popularity of the ideals of the “sharing economy” and the aftermaths of the 2008 global financial crisis. On the other hand, the duopoly is challenged from the “top down”—the most powerful digital players have started to extend their operations to tourism. The second section of the paper identifies three current areas of platformization in tourism operations—distribution, promotion and HRM. We analyze available industry and public statistics indicators in Europe for each of the three dimensions. Finally, we discuss the regulatory responses to the market concentration of travel distribution platforms. Although the challenge of market concentration is a global issue, and the threats are the same in many countries, we limit the discussion of regulation to the European context. In conclusion we discuss the possibilities of future development, and point to the threat of the further acceleration and interconnection of platformization and market concentration in the travel business.
Keywords: travel platforms, market concentration regulation, online travel agencies, Global Distribution Systems, Expedia, Booking.com, Airbnb, Tripadvisor, Google Travel, algorithmic management
Published in DKUM: 14.10.2025; Views: 0; Downloads: 6
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2. Learning analytics : a case study on exploring social interaction and problem-solving strategiesVladimir Grubelnik, Nataša Rizman Herga, Andrej Flogie, Mihaela Brumen, Marko Marhl, Dejan Dinevski, 2025, original scientific article Abstract: Purpose: The purpose of this study is to preliminarily verify the concept of personalised and collaborative learning and to formatively observe students' knowledge, skills, problem-solving strategies and social dynamics in the classroom. Study design/methodology/approach: The study was conducted with 8th grade students (N=21) using the ClassRoom Analytica (CRA) application as part of a thematic unit on ionic bonds. Students participated in digitally facilitated group problem-solving activities guided by predefined parameters for accessing information. Findings: The use of the CRA application proved highly beneficial in a heterogeneous class as it was responsive to all students and provided the teacher with detailed information about each individual’s role within the class. Originality/value: This study presents CRA as a novel integration of learning analytics and domain-specific visualisations in the science classroom.
Keywords: learning analytics, social interaction, problem-solving
Published in DKUM: 23.07.2025; Views: 0; Downloads: 12
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4. Uporaba vprašanj izbirnega tipa pri predmetu spoznavanje okolja na temo svetloba v 3. razredu : magistrsko deloTimea Bogdan, 2024, master's thesis Abstract: Magistrsko delo z naslovom Uporaba vprašanj izbirnega tipa pri predmetu spoznavanje okolja na temo svetloba v 3. razredu je sestavljeno iz treh delov, teoretičnega, empiričnega in praktičnega.
Teoretični del vsebuje natančen opis vprašanj izbirnega tipa, način sestave ter prednosti in slabosti le-teh.
V empiričnem delu je predstavljena raziskava o uporabi vprašanj izbirnega tipa pri predmetu spoznavanje okolja v 3. razredu. Ugotovili smo, da učitelji uporabljajo vprašanja izbirnega tipa tudi pri predmetu spoznavanje okolja. Učitelji, ki vključujejo vprašanja izbirnega tipa pri pouku, so mnenja, da so pomembna in koristna, saj učenci razvijajo sposobnost kritičnega mišljenja, obenem omogočajo hitro analizo, ekonomičnost in motiviranost učencev je večja. Večina jih taka vprašanja uporablja za utrjevanje snovi v ustni in pisni obliki.
V praktičnem delu magistrskega dela je predstavljena učna ura v 3. razredu, ki smo jo natančno načrtovali, izpeljali in ovrednotili odgovore učencev. Pri delu z učenci smo vključili eksperimentalno delo in uporabo vprašanj izbirnega tipa ter podtipov teh vprašanj, ki so bila v povezavi s temo svetloba v obeh jezikih. Ugotovili smo, da večina učencev ni imela težav pri odgovarjanju na vprašanja izbirnega tipa z enim pravilnim odgovorom, medtem ko so imeli težave pri odgovarjanju na vprašanja izbirnega tipa z več pravilnimi odgovori.
Keywords: vprašanja izbirnega tipa, spoznavanje okolja, svetloba, 3. razred, dvojezični pouk
Published in DKUM: 07.05.2025; Views: 0; Downloads: 15
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5. 44th International Conference on Organizational Science Development : Human Being, Artificial Intelligence and Organization, Conference Proceedings2025, proceedings of peer-reviewed scientific conference contributions (international and foreign conferences) Abstract: The 44th International Scientific Conference on the Development of Organisational Science was focused on developing and advancing knowledge in the organisational sciences, with a focus on the contemporary challenges and opportunities of our time. On the one hand, it is humans who have woven the knowledge of organisations and will continue to enrich the knowledge of organisations in the future. On the other hand, we need to take into account the situational factors and the wider environment that are intrinsic to understanding organisations. The title of this year's conference is: Human being, Artificial Intelligence and the Organisation. The society we live in today is going through a period of great change in various areas of our lives. Although our pace sometimes stops, the forces of the environment do not. The pace of change often no longer surprises us. But the pillars of our action, the achievements of human society, are something of which we can be justly proud. Artificial intelligence is one of the forces that has entered our everyday lives in many places in recent times. Where are the opportunities and where are the dangers of artificial intelligence, where is human intelligence still a significant step ahead of artificial intelligence?
Keywords: organization, human being, artificial intelligence, changes, organizational development
Published in DKUM: 20.03.2025; Views: 0; Downloads: 37
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6. The changing world dynamics of research performanceMarko Marhl, Rene Markovič, Vladimir Grubelnik, Matjaž Perc, 2025, original scientific article Abstract: In recent years, a notable diversification in the geographical representation of the World's top universities could be observed. Chinese universities play an increasingly prominent role in these rankings, thus indicating that we might be in the midst of a regional shift in academic performance. To explore this dynamics, we analyze seven years' worth of data used for university rankings by academic subjects from the Academic Ranking of World Universities (ARWU). We focus on China, Europe, the USA, and other global regions of the world. We find that China has indeed seen an unprecedented growth in Engineering and Life Sciences research, positioning itself rather firmly as a leader in these fields. Conversely, the USA leads in the Social Sciences, while Europe excels in Geography, Ecology, Public and Business Administration, and Pharmacy. Other regions worldwide stand out in Transportation Science, Nursing, and Hospitality & Tourism Management. These results reveal the evolving landscape of global academic research, highlighting regional strengths and emerging world trends in subject-specifc excellence.
Keywords: research dynamics, academic excellence, geographical diversifcation, University rankings
Published in DKUM: 11.02.2025; Views: 0; Downloads: 8
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8. Clostridioides difficile ribotype distribution in a large teaching hospital in SerbiaMiloš Korać, Maja Rupnik, Nataša Nikolić, Milica Jovanović, Tanja Tošić, Jovan Malinić, Nikola Mitrović, Marko Marković, Ankica Vujović, Sanja Peruničić, Ksenija Bojović, Vladimir V. Đorđević, Aleksandra Barać, Ivana Milošević, 2020, original scientific article Abstract: Background: The global epidemic of nosocomial diarrhea caused by Clostridioides (Clostridium) difficile started in 2000, with high mortality rates and emergence of a new hypervirulent strain NAP1/BI/027. The aim of this study was to assess the presence of ribotype 027 and other C. difficile ribotypes in a Serbian University Hospital, compare the temporal variability of ribotypes 3 years apart, as well as to compare clinical, demographic and laboratory characteristics and disease outcome among patients infected with 027 and non-027 ribotype. This was a prospective observational cohort study addressing 4-month intervals during 2014/2015 and 2017/2018.
Results: Ribotyping was performed in 64 non-duplicate C. difficile strains. Ribotype 027 was the most prevalent, and was detected in 53 (82.8%) patients (43/45 and 10/19 patients in 2014-2015 and 2017/2018, respectively). Other detected ribotypes were 001/072 in 4 (6.3%), 002 in 4 (6.3%), 014/020 in 2 (3.1%) and 176 in 1 (1.5%) patient. The percentage of the patients infected with ribotype 027 significantly decreased during the 3-year period, from 95.6 to 52.6% (p < 0.001). Ribotype 027 infection was associated with fluoroquinolone treatment more frequently than infection with other ribotypes [33 (62.3%) vs. 2 (18.2%), p = 0.010)]. A severe C. difficile infection was diagnosed more often in patients with the detected ribotype 027 compared to those infected with non-027 ribotypes (p = 0.006). No significant difference in the mortality and recurrence rates was found between the patients infected with ribotype 027 and those infected with other ribotypes [10/53 (18.8%) vs. 2/11 (18.2%), p = 0.708, and 10/35 (28.6%) vs. 0/2 (0%), p = 1.000, respectively].
Conclusion: Clostridium difficile ribotype 027 was the most prevalent ribotype among patients in a large Serbian hospital, but there is a clear decreasing trend.
Keywords: Clostridium difficile, ribotype 027, Serbia
Published in DKUM: 27.01.2025; Views: 0; Downloads: 10
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9. Topological features of spike trains in recurrent spiking neural networks that are trained to generate spatiotemporal patternsOleg Maslennikov, Matjaž Perc, Vladimir Nekorkin, 2024, original scientific article Abstract: In this study, we focus on training recurrent spiking neural networks to generate spatiotemporal patterns in the form of closed two-dimensional trajectories. Spike trains in the trained networks are examined in terms of their dissimilarity using the Victor-Purpura distance. We apply algebraic topology methods to the matrices obtained by rank-ordering the entries of the distance matrices, specifically calculating the persistence barcodes and Betti curves. By comparing the features of dierent types of output patterns, we uncover the complex relations between low-dimensional target signals and the underlying multidimensional spike trains.
Keywords: topological features, neural networks, spatiotemporal patterns, nonlinear dynamics
Published in DKUM: 27.11.2024; Views: 0; Downloads: 2
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10. Predictors of reactive agility in early puberty: a multiple regression gender-stratified studyVladimir Pavlinović, Nikola Foretić, Šime Veršić, Damir Sekulić, Silvester Lipošek, 2022, original scientific article Abstract: Reactive agility (RAG) is a crucial factor of success in sports, but there are practically no
studies dealing with RAG among children. The main aim of this study was to identify predictors
of RAG among early pubescent boys and girls. The participants were primary school boys (n = 73)
and girls (n = 59) aged 11–12. The criterion variable was the originally developed “Triangle” test
of reactive agility (Triangle-RAG). Predictors included anthropometric/body composition indices
(body height, seated height, body mass, and body fat percentage) and motor abilities (10 and 20 m
sprint, broad jump, squat jump, countermovement jump, drop jump, and two tests of change of
direction speed—CODS (Triangle-CODS, and 20 yards)). The results of the univariate analysis
showed that anthropometric/body composition indices were not significantly correlated to TRAG
(0–4% of the common variance), while all motor abilities were significantly associated with TRAG
(7–43% of the common variance) in both genders. Among boys, 64% of the TRAG variance was
explained by multiple regression, with TCODS as the only significant predictor. Among girls, multiple
regression explained 59% of the TRAG-variance with TCODS, countermovement jump, and drop
jump as significant predictors. Differences in multivariate results between genders can be explained
by (i) greater involvement in agility-saturated sports (i.e., basketball, tennis, soccer) in boys, and
(ii) advanced maturity status in girls. The lack of association between anthropometric/body built and
TRAG was influenced by the short duration of the TRAG (3.54 ± 0.4 s). Our findings suggest that
pre-pubescent and early pubescent children should be systematically trained on basic motor abilities
to achieve fundamentals for further developing RAG. Since in this study we observed predictors
including only athletic abilities and anthropometric/body composition, in future studies, other motor
abilities, as well as cognitive, perceptual, and decision-making parameters as potential predictors of
RAG in children should be investigated.
Keywords: non-planned agility, pre-planned agility, anthropometry, children
Published in DKUM: 03.10.2024; Views: 0; Downloads: 12
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