1. Impact of grassland management system intensity on composition of functional groups and soil chemical properties in semi-natural grasslandsUrška Lisec, Maja Prevolnik Povše, Miran Podvršnik, Branko Kramberger, 2025, izvirni znanstveni članek Opis: Semi-natural grasslands are some of the most species-rich habitats in Europe and provide important ecosystem services such as biodiversity conservation, carbon sequestration and soil fertility maintenance. This study investigates how different intensities of grassland management affect the composition of functional groups and soil chemical properties. Five grassland management systems were analyzed: Cut3—three cuts per year; LGI—low grazing intensity; CG—combined cutting and grazing; Cut4—four cuts per year; and HGI—high grazing intensity. The functional groups assessed were grasses, legumes and forbs, while soil samples from three depths (0–10, 10–20 and 20–30 cm) were analyzed for their chemical properties (soil organic carbon—SOC; soil total nitrogen—STN; inorganic soil carbon—SIC; soil organic matter—SOM; potassium oxide—K2O; phosphorus pentoxide—P2O5; C/N ratio; and pH) and physical properties (volumetric soil water content—VWC; bulk density—BD; and porosity—POR). The results showed that less intensive systems had a higher proportion of legumes, while species diversity, as measured via the Shannon index, was the highest in the Cut4 system. The CG system tended to have the highest SOC and STN at a 0–10 cm depth, with a similar trend observed for SOCstock at a 0–30 cm depth. The Cut4, HGI and CG systems also had an increased STNstock. Both grazing systems had the highest P2O5 content. A tendency towards a higher BD was observed in the top 10 cm of soil in the more intensive systems. Choosing a management strategy that is tailored to local climate and site conditions is crucial for maintaining grassland stability, enhancing carbon sequestration and promoting long-term sustainability in the context of climate change.
Ključne besede: grassland biodiversity, management intensity, composition of functional groups, soil chemical and physical properties, carbon and nitrogen storage, soil C:N ratio, sustainability
Objavljeno v DKUM: 13.10.2025; Ogledov: 0; Prenosov: 7
 Celotno besedilo (2,34 MB)
Gradivo ima več datotek! Več... |
2. Artificial Intelligence software adoption in manufacturing companiesKlemen Kovič, Polona Tominc, Jasna Prester, Iztok Palčič, 2024, izvirni znanstveni članek Opis: This study investigates the adoption of artificial intelligence (AI) software in manufacturing companies in Slovenia, Slovakia and Croatia, and across six production areas. This research ad-dresses a gap in the literature regarding AI software implementation in relation to company size, technology intensity and supply chain role, and examines whether Industry 4.0 (I4.0) readiness influences AI adoption. Data from the European Manufacturing Survey 2022 were analyzed, and showed that the use of AI is still relatively low. On average only 18.4% of companies use AI software in at least one production area. Logistic regression analysis revealed that neither company size nor role in the supply chain or technology intensity are statistically significantly related to AI usage. However, a significant positive relationship was found between I4.0 readiness and AI adoption, suggesting that companies with advanced digital infrastructures and integrated cyber-physical systems are more likely to adopt AI. This finding underlines the importance of digital transformation for the integration of AI software. The study concludes that while company characteristics such as size and the role of the company in the supply chain are not statistically significantly related to the use of AI, the level of digital readiness is crucial.
Ključne besede: artificial intelligence, manufacturing, company size, company role, technology intensity, Industry 4.0, Industry 4.0 readiness
Objavljeno v DKUM: 30.06.2025; Ogledov: 0; Prenosov: 3
Celotno besedilo (476,18 KB)
Gradivo ima več datotek! Več... |
3. Toward embedded system resources relaxation based on the event-triggered feedback control approachAndrej Sarjaš, Dušan Gleich, 2022, izvirni znanstveni članek Opis: The paper describes an event-triggered nonlinear feedback controller design. Event triggering is a real-time controller implementation technique which reduces embedded system utilization
and relaxes task scheduling of the real-time system. In contrast to classic time implementation
techniques, the event-triggered execution is validated regarding the introduced triggering policy.
The triggering rule is a boundary, where the last task value is preserved until the rule is violated.
In the given paper, two different event-triggered strategies are designed for the class of dynamic
systems with integral behavior. Both methods are based on sliding mode controller design, where the
triggering rule of the first design involves only a partial state vector, which is a direct consequence of
the triggering rule derivation throughout the Lyapunov stability analysis. In the second approach,
the sliding mode controller is designed upon prior stabilized systems with the additional term, which
enables derivation of the triggering rule based on the whole state vector. The second approach offers
better closed-loop performance and higher relaxation of the system utilization. The selection of
triggering boundary is related closely to the derived minimal inter-event time, which impacts the
computational burden of the real-time system and closed-loop performance directly. The derived
controllers are compared with the classic sample and hold implementation techniques. The real-time
results are presented, and system performances are confirmed regarding embedded system task
relaxation, lowering the computational intensity and preserving closed-loop dynamics.
Ključne besede: sliding mode control, event-triggered control, lowering computational intensity, task relaxation
Objavljeno v DKUM: 28.03.2025; Ogledov: 0; Prenosov: 13
Celotno besedilo (18,67 MB)
Gradivo ima več datotek! Več... |
4. Structural integrity and life assessment of Ti-6Al-4V orthopaedic implantsKatarina Čolić, Svetlana M. Kostić, Simon Sedmak, Nenad Gubeljak, Aleksandar Grbović, 2024, izvirni znanstveni članek Opis: This paper presents an experimental and numerical analysis of the mechanical behaviour of orthopaedic implants with crack-type defects, considering the principles and advantages of the modern X-FEM method, which was used due to limitations of traditional FEM in terms of crack growth simulation, especially for complex geometries. In X-FEM, the finite element space is enriched with discontinuity functions and asymptotic functions at the crack tip, which are integrated into the standard finite element approximation using the unity division property. Though rare, femoral component failures are well-documented complications that can occur after hip prosthetic implantation. Most stem fractures happen in the first third of the implant due to the loosening of the proximal stem and fixation of the distal stem, leading to bending and eventual fatigue failure. The main goal of this paper was to obtain accurate and representative models of such failures. Experimental analyses of the mechanical behaviour of implants subjected to physiological loads, according to relevant standards, using a new combined approach, including both experiments and numerical simulations was presented. The goal was to verify the numerical results and obtain a novel, effective methodology for assessing the remaining fatigue life of hip implants. For this purpose, the analysis of the influence of Paris coefficients on the total number of cycles was also considered. Hence, this simulation involved defining loads to closely mimic real-life scenarios, including a combination of activities such as ascending stairs, stumbling, and descending stairs. The tensile properties of the titanium alloy were experimentally determined, along with the Paris law coefficients C and m. The finite element software ANSYS 2022R2 version was used to develop and calculate the three-dimensional model with a crack, and the resulting stresses, stress intensity factors, and the number of cycles presented in the figures, tables, and diagrams. The results for the fatigue life of a partial hip implant subjected to various load cases indicated significant differences in behaviour, and this underscores the importance of analysing each case individually, as these loads are heavily influenced by each patient’s specific activities. It was concluded that the use of numerical methods enabled the preliminary analyses of the mechanical behaviour of implants under fatigue loading for several different load cases, and these findings can be effectively used to predict the possibility of Ti-6Al-4V implant failure under variable cyclic loads.
Ključne besede: structural integrity, fatigue fracture, extended finite element method (XFEM), experimental testing, DIC, numerical simulations, stress intensity factor, orthopaedic implants, crack-type defect
Objavljeno v DKUM: 21.03.2025; Ogledov: 0; Prenosov: 8
Celotno besedilo (5,22 MB)
Gradivo ima več datotek! Več... |
5. Exploring social customer relationship management adoption in micro, small and medium-sized enterprisesMarjeta Marolt, Hans Dieter Zimmermann, Anja Žnidaršič, Andreja Pucihar, 2019, izvirni znanstveni članek Opis: With the emergence of social media, customer relationship management has undergone noticeable changes and gained a great deal of attention from researchers and practitioners in recent years. In this paper, we provide additional insights into how intensively business-to-customer micro, small and medium-sized enterprises adopt social customer relationship management. Based on the literature review and insights from interviews with six micro, small and medium-sized enterprise owners/managers, we developed a conceptual research model that integrates the antecedents, intensity of social customer relationship management adoption, and performance outcomes. For the intensity of social customer relationship management adoption, we applied process-based conceptualization consisting of the customer engagement process and customer data management process. Then we empirically tested a conceptual research model by using data collected in a survey of 119 micro, small and medium-sized enterprises in Slovenia. We found that not all antecedents are equally relevant to both processes of the intensity of social customer relationship management adoption. Additionally, we found that the intensity of social customer relationship management adoption has a positive effect on customer relationship performance. Based on these findings, we provide recommendations for further research and offer practical implications for micro, small and medium-sized enterprises considering social customer relationship management adoption.
Ključne besede: social customer relationship management adoption, adoption intensity, antecedent, performance, micro, small and medium-sized enterprises
Objavljeno v DKUM: 11.03.2025; Ogledov: 0; Prenosov: 11
Celotno besedilo (1,10 MB)
Gradivo ima več datotek! Več... |
6. Objectively measured physical activity in patients with coronary artery disease : a cross-validation studyTim Kambič, Nejc Šarabon, Vedran Hadžić, Mitja Lainščak, 2021, izvirni znanstveni članek Opis: Physical activity (PA) and sedentary behavior (SB) levels in healthy adults are predominately based on self-reporting measures, which generally overestimate PA but underestimate SB. Patients with coronary artery disease (CAD) eligible for cardiac rehabilitation (CR) follow an individualized program; thus, objective assessment of physical performance and regular daily activity is required. This study aimed to compare self-reported and objectively measured PA and SB in patients with CAD prior to out-patient CR. We included 91 patients with CAD and assessed their PA with an accelerometer for 8 days prior to CR, along with the short form of the international physical activity questionnaire. We found that most patients were sedentary (61%, ~8 h/day), and on average performed 63 min/day of moderate-to-vigorous-intensity physical activity (MVPA). Males performed less daily light-intensity physical activity (−5%, p = 0.011) and performed more MVPA (+2%, p = 0.002) compared to females. Maximal aerobic capacity was significantly associated with MVPA (Spearman rho = 0.483, p < 0.001) and MVPA > 10 min bouts (Spearman rho = 0.391, p < 0.001). Self-reported measures overestimated MVPA (total MVPA, +108 min/day, p < 0.001; MVPA > 10 min bouts, +152 min, p < 0.001) and underestimated SB (−174 min/day, p < 0.001) compared to objective measures. There was no significant correlation between methods in MVPA (Spearman rho = 0.147, p = 0.165)), MVPA > 10 min bouts (Spearman rho = −0.059, p = 576), and SB (Spearman rho = 0.139, p = 0.187). Quantitative analysis demonstrated the huge proportional bias for MVPA, MVPA > 10 min bouts, and SB. Our findings demonstrate that self-reported physical activity provides inaccurate estimates of MVPA and SB in patients with CAD entering the ambulatory CR. This strongly supports the more objective assessments of daily PA, preferably using an accelerometer.
Ključne besede: myocardial infarction, cardiovascular disease, acute coronary syndrome, sedentary behavior, motor activity, accelerometry, moderate intensity, vigorous intensity
Objavljeno v DKUM: 20.08.2024; Ogledov: 117; Prenosov: 14
Celotno besedilo (1,23 MB)
Gradivo ima več datotek! Več... |
7. Application of the Huff's probability model on selected large-area retail units in Košice in the context of transformational changes in retail after 1989 in SlovakiaJana Fertal'ová, Pavol Varga, 2007, izvirni znanstveni članek Opis: After 1989 there have been rather significant qualitative and spatial changes in retail trade network in Slovakia. The behaviour of trader as well as consumer is changing. Supranational trade networks with their large hypermarkets are penetrating our trade. In last four years the share of hypermarket shopping in Slovakia has increased more than twice, and the share of small shops and counter shops is decreasing despite the fact that they keep the highest average annual shopping frequention. Hypermarkets continuously make a profit of new customers.
Ključne besede: retail, shopping behaviour, Slovakia, hypermarket, retail store, intensity of attendance, accessibility area of attendance, the Huff´s probability model
Objavljeno v DKUM: 13.03.2018; Ogledov: 1096; Prenosov: 137
Celotno besedilo (407,98 KB)
Gradivo ima več datotek! Več... |
8. Evolution under alliance-specific cyclical invasion rates : lecture, presented at the Satellite Workshop at ECCS 07, Dresden, 4th-5th October (Evolution of of noise), 2007Matjaž Perc, 2007, prispevek na konferenci brez natisa Ključne besede: hrup, intenziteta hrupa, dilema zapornika, kaos, nelinearni dinamični sistemi, noise, spatiotemporal noise, intensity, prisoner's dilemma, chaos, nonlinear dynamic systems
Objavljeno v DKUM: 10.07.2015; Ogledov: 1693; Prenosov: 45
 Povezava na celotno besedilo |
9. Cooperation out of noise : lecture, presented at the Satellite Workshop at ECCS 07, Dresden, 4th-5th OctoberMatjaž Perc, 2007, prispevek na konferenci brez natisa Ključne besede: hrup, intenziteta hrupa, dilema zapornika, kaos, nelinearni dinamični sistemi, noise, spatiotemporal noise, intensity, prisoner's dilemma, chaos, nonlinear dynamic systems
Objavljeno v DKUM: 10.07.2015; Ogledov: 1725; Prenosov: 29
Povezava na celotno besedilo |
10. Spatial decoherence induced by small-world connectivity in excitable mediaMatjaž Perc, 2005, izvirni znanstveni članek Opis: We study effects of different network topologies on the noise-induced pattern formation in a two-dimensional model of excitable media with FitzHugh-Nagumo local dynamics. In particular, we show that the introduction of long-range couplings induces decoherence of otherwise coherent noise-induced spatial patterns that can be observed by regular connectivity of spatial units. Importantly, already a small fraction of long-range couplings is sufficient to destroy coherent pattern formation. We argue that the small-world network topology destroys spatial order due to the lack of a precise internal spatial scale, which by regular connectivity is given by the coupling constant and the noise robust excursion time that is characteristic for the local dynamics. Additionally, the importance of spatially versus temporally ordered neural network functioning is discussed.
Ključne besede: dynamic systems, noise, spatiotemporal noise, intensity, spatial resonance, inherent spatial resonance, spatial decoherence, excitable media
Objavljeno v DKUM: 07.06.2012; Ogledov: 1537; Prenosov: 423
Celotno besedilo (1,58 MB)
Gradivo ima več datotek! Več... |
