1801. Parametrična analiza odziva večnadstropnih lesenih stavb na vetrno obtežboBlaž Kurent, Boštjan Brank, 2025, izvirni znanstveni članek Povzetek: Večnadstropne lesene stavbe so zaradi svoje lahkosti občutljive na nihanje zaradi vetra, kar lahko povzroča neugodje pri uporabnikih. Zato je merilo ugodja stanovalcev pogosto eden ključnih kriterijev pri projektiranju večnadstropnih lesenih stavb. V članku izračunamo pričakovane pospeške nihanja zaradi vetra za deset lesenih in hibridnih lesenih stavb z višinami med 22 m in 74 m, za katere so bili pridobljeni podatki o dimenzijah, masi ter dinamičnih lastnostih. Pospeški so bili izračunani po SIST EN 1991- 1-4:2005 ter ovrednoteni po ISO 10137. Parametrična analiza je pokazala, da lokacija stavbe najbolj vpliva na njen odziv, izmed dejavnikov oblike stavbe ima največji vpliv zaobljenost oziroma prirezanost robov. Ugotovljeno je bilo tudi, da je za doseganje merila ugodja pri nižjih stavbah primerneje povečati togost, pri višjih pa dodati maso. V analizo je bila vključena tudi trenutno najvišja lesena stavba na svetu, analiza pa je pokazala potencial gradnje še višjih lesenih stavb v prihodnosti.
Ključne besede: lesene stavbe, vetrna obtežba, nihanje stavbe, mejno stanje uporabnosti, parametrična analiza
Objavljeno v DiRROS: 01.07.2025; Ogledov: 339; Prenosov: 244
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1802. Ponazoritev metodološke kompleksnosti uvajanja LCA v načrtovalsko prakso na primeru Smernic za nizkoogljične stavbe slovenskih stanovanjskih skladovDavid Božiček, Jaka Potočnik, Luka Pajek, Mitja Košir, 2025, izvirni znanstveni članek Povzetek: Nova Direktiva o energetski učinkovitosti stavb (EPBD) uvaja vrednotenje vseživljenjskega ogljičnega odtisa stavb v načrtovalsko prakso. Kot orodje za izračun ogljičnega odtisa stavb je predvidena metoda ocenjevanja življenjskega cikla (LCA). Stavbe so kompleksni sistemi z dolgo življenjsko dobo, sestavljeni iz množice različnih gradbenih proizvodov. Uporaba metode LCA zato zahteva strukturiran pristop, celovito definicijo robnih pogojev in scenarijev izračuna ter podatke, s katerimi določamo okoljski odtis v različnih fazah življenjskega cikla stavb. V članku je predstavljena vsebina Smernic za nizkoogljične stavbe slovenskih stanovanjskih skladov (smernice SSS). Predstavitev smernic služi kot izhodišče za razumevanje metodologije LCA in ključnih elementov, ki so zahtevani za harmonizirano vrednotenje ogljičnega odtisa stavb. V nadaljevanju je predstavljena primerjava metodoloških karakteristik izbranih nacionalnih metod in okvira Level(s) z metodo v smernicah SSS. To omogoča diskusijo o prihajajočih izzivih in tveganjih povezanih z uvajanjem LCA v načrtovalsko prakso in obrazložitev, zakaj bo prihajajoča nacionalna metoda za Slovenijo imela drugačno zasnovo kot v smernicah SSS. V Sloveniji se moramo pripraviti na uvedbo LCA, sicer obstaja tveganje za preobremenitev projektantov in dvom o reprezentativnosti izračunov.
Ključne besede: LCA, ocenjevanje življenjskega cikla, ogljični odtis, ogljični odtis stavb, smernice za nizkoogljične stavbe
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1803. Gender-specific predictors of vault performance in gymnastics : a machine learning approachDušan Đorđević, Janez Vodičar, Robi Kreft, Edvard Kolar, Miloš Paunović, Saša Veličković, Miha Marinšek, 2025, izvirni znanstveni članek Povzetek: This study investigated gender-specific predictors of vault performance in gymnastics by applying machine learning techniques to analyse body composition and run-up dynamics. Data were collected from 27 national-level gymnasts (17 female, 10 male) during the Slovenian Cup competition.
The focus on gender-specific predictors stems from fundamental physiological and biomechanical differences between male and female athletes, which influence force production, movement kinematics, and execution mechanics. A deeper understanding of these distinctions enhances the precision of performance modelling and supports the development of targeted, evidence-based training interventions.
Spatiotemporal parameters of the run-up were recorded using the OptoGait system, while body composition was assessed with the Tanita DC-360. Principal Component Analysis (PCA) and Boosting regression models were used to identify key predictors of vault execution scores. These methods were selected for their ability to reduce dimensionality and capture complex, nonlinear relationships in performance data.
The results revealed clear gender-specific patterns. For female gymnasts, the model explained 74.4% of the variance in execution scores, with Overall Lean Body Mass emerging as the most influential predictor (47.12% relative influence), followed by Overall Contact Phases (25.28%). For male gymnasts, the model demonstrated exceptionally high predictive power, explaining 97.8% of the variance, with Body Fat as the primary predictor (48.44% relative influence), followed by Flight and Contact Dynamics (35.22%).
These findings suggest that training strategies should be tailored to gender-specific needs. For women, emphasis on lean muscle development, stride optimisation, and the coordination of rhythm and timing may be beneficial. For men, managing body fat levels, optimising flight and contact dynamics, and adopting an integrated approach to stride mechanics appear essential.
Given the potential for misinterpretation of body composition metrics, a holistic approach to athletic conditioning is recommended. However, the study’s limitations, including the small sample size and cross-sectional design, warrant cautious interpretation. This research provides a foundation for future investigations into gender-specific factors affecting vault performance. Larger and longitudinal studies are needed to validate these findings and support the development of more precise training interventions.
Ključne besede: run-up characteristics, body composition, execution score, principal component analysis
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1804. Assessing the vulnerability of agricultural sectors to climate change : a case study for SloveniaTanja Travnikar, Ajda Bleiweis, Maja Kožar, 2025, izvirni znanstveni članek Ključne besede: climate change, climate vulnerability, assessment method, vulnerability matrix, agricultural sectors, Slovenia
Objavljeno v DiRROS: 30.06.2025; Ogledov: 503; Prenosov: 173
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1806. Leaf mine types and associated parasitism in the invasive tree insect pest Macrosaccus Robiniella (Lepidoptera: Gracillariidae) : a case study from slovenia and croatiaNatalia I. Kirichenko, Stanislav Gomboc, Oksana V. Kosheleva, Dinka Matošević, Barbara Piškur, Maarten De Groot, 2025, izvirni znanstveni članek Povzetek: Since its first documentation on the European continent in 1983, the invasive micromoth Macrosaccus robiniella (Clemens, 1859) (Lepidoptera: Gracillariidae) was known only for its lower-side blotch mines occupying one of the leaflet halves (common mine type, hereafter mine type 1). In 2023, in abundant populations of M. robiniella in forest areas of Slovenia and Croatia (with more than 50% of leaves damaged), we observed that, in addition to the common mine, this invasive species is capable of forming three other mine types. One (type 2) resembles the common mine type by occupying one half of a leaflet, but the mine is situated on the upper side of the leaf. The two other mine types differ from the common mine in both appearance and position on the leaflet. These include a blotch above the midrib on the upper side of the leaflet (type 3) and a narrow blotch at the edge, causing strong downward folding (type 4). The mines of types 3 and 4 resemble the damage caused by two North American black locust herbivores that are also invasive to Europe: the gracillariid Parectopa robiniella Clemens, 1863 (Lepidoptera: Gracillariidae) and the gall midge Obolodiplosis robiniae (Haldeman, 1847) (Diptera: Cecidomyiidae), respectively. In the studied localities, the relative abundance of mine types 3 and 4 was about four times higher than that of mine type 1. The parasitism rate in these mines was 6.5 times lower compared to that in mine type 1. No statistical difference was found in the parasitism rate between mine types 3 and 4. We discuss how the leaf-mining behaviour of M. robiniella may provide an enemy-free space, conferring a survival advantage and supporting a high population density in forested areas.
Ključne besede: locust leaf-miner, biological invasion, leaf-mining behaviour, parasitoid attacks, Europe
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1808. First record of the non-native Cnestus mutilatus (Blandford) and further findings of other Xyleborini (Curculionidae, Scolytinae) recently recorded in SloveniaTine Hauptman, Luka Capuder, Zina Devetak, Maarten De Groot, Massimo Faccoli, Barbara Piškur, 2025, izvirni znanstveni članek Povzetek: Ambrosia beetles of the subfamily Scolytinae (Coleoptera: Curculionidae) have successfully invaded many parts of the world and are increasingly being introduced to new areas, primarily through international trade. The number of non-native species recorded in Slovenia is also increasing. During the national survey of quarantine species in 2024, a new non-native scolytine beetle, Cnestus mutilatus, was recorded for the first time in Slovenia. Two specimens were trapped at Radmožanci, a location in northeastern Slovenia. New data on two other species recently recorded in Slovenia, Anisandrus maiche and Xylosandrus compactus, are also presented.
Ključne besede: ambrosia beetles, biological invasions, forest, invasive alien species, trapping
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1809. Influence of residual felling on bark beetles and other insect diversityMaarten De Groot, Luka Capuder, I. G. Farah Kootstra, Martin Križaj, Marija Kolšek, Mitja Ferlan, Tine Hauptman, 2025, zaključena znanstvena zbirka raziskovalnih podatkov Ključne besede: research data, bark beetles
Objavljeno v DiRROS: 30.06.2025; Ogledov: 519; Prenosov: 257
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1810. Sizing of a hydrogen system for green-hydrogen production by utilising surplus water accumulation in a hydropower plantDavid Jure Jovan, Boštjan Pregelj, Mihael Sekavčnik, Gregor Dolanc, 2025, izvirni znanstveni članek Povzetek: The utilisation of surplus hydro energy can enhance the profitability of hydropower plant operation by cogeneration of green hydrogen along regular electricity production. Effective integration of the hydrogen system requires its appropriate sizing based on surplus hydro energy availability, its temporal dynamics, scheduled electricity generation, and expected hydrogen demand. The article introduces a decision-support tool designed for the optimal sizing of hydrogen systems in run-of-river hydropower plants with surplus hydropower. In contrast to conventional methods, the developed tool enables rapid configuration of key hydrogen-system components without relying on complex optimisation algorithms. Implemented in MATLAB App Designer, the tool provides a visual inspection of the entire search space, thus avoiding possible sub-optimal solutions. The tool has been tested on the case-study hydropower plant and it demonstrates the capabilities for proper sizing of a hydrogen system. The results show that the hydrogen system with 0.75-MW electrolyser and 20 m3 storage tank can generate up to 52,652 € in a rainy month and can produce up to 86 tonnes of hydrogen annually, achieving approximately 440,000 € of additional income. The tool can provide valuable insights into hydrogen system's installation profitability, to guide investment decisions in sustainable hydrogen infrastructure and can contribute to broader energy transition strategies.
Ključne besede: surplus hydro energy, optimisation, sizing, green hydrogen
Objavljeno v DiRROS: 30.06.2025; Ogledov: 399; Prenosov: 231
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