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1.
Male reproductive organ weight : criteria for detection of androstenone-positive carcasses in immunocastrated and antire male pigs
Gregor Fazarinc, Nina Batorek Lukač, Martin Škrlep, Klavdija Poklukar Žnidaršič, Alice Broeke, Kevin Kress, Etienne Labussière, Volker Stefanski, Milka Vrecl, Marjeta Čandek-Potokar, 2023, izvirni znanstveni članek

Opis: Immunocastration and rearing of entire males (EMs) are sustainable alternatives to surgical castration. However, these animal carcasses have variable risk of boar taint and should be identified at the slaughter line. We aimed to identify a simple and reliable indicator of androstenone-related boar taint by evaluating pelvic urogenital tract weight as a marker of boar-taint animals at the slaughter line. The pelvic urogenital tract, testes, and accessory sex glands of EMs and immunocastrates (ICs) were collected, dissected, and weighed, before colorimetric measurements of testicular tissue. Additionally, GnRH antibody titers and testosterone, androstenone, and skatole levels were determined. Our results showed that 81.8% of EMs had androstenone levels above the risk threshold (>0.5 µg/g fat; EM/Ahigh subgroup), whereas in ICs, the C/Ahigh subgroup with androstenone >0.5 µg/g fat accounted for only 4.3%. Androstenone levels correlated negatively with GnRH antibody titers and positively with testosterone levels and reproductive organ weights. Identification of ICs with androstenone levels above the threshold (IC/Ahigh subgroup) may be achieved via testes or pelvic urogenital tract weight measurements. However, in EMs, the latter is a more reliable parameter. A principal component analysis based on these variables and hierarchical clustering also distinguished the Ahigh from the Alow subgroup, irrespective of IC/EM. The findings highlight the possible use of pelvic urogenital tract weight along with testes weight as a simple, reliable, and efficient morphometric indicator for identifying androstenone-positive carcasses of different sex categories.
Ključne besede: boar taint, morphometric indicators, immunocastration, entire males
Objavljeno v DKUM: 11.04.2024; Ogledov: 113; Prenosov: 4
.pdf Celotno besedilo (663,86 KB)
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2.
An innovative approach to organizational changes for sustainable processes : a case study on waste minimization
Eva Krhač Andrašec, Tomaž Kern, Benjamin Urh, 2023, izvirni znanstveni članek

Opis: It is necessary to adapt constantly to the business environment with its changing demands. Understanding the objectives, scope, and limitations of actual process changes is crucial, and can be achieved with numerous measures, methods, and techniques. This research demonstrates an innovative approach to organizational changes to enable sustainable processes. In the first part of this research, relevant measures, methods, and techniques are selected through an in-depth literature review. Then, an international online questionnaire is executed among 213 enterprises from four countries. In the last part of this research, the developed approach is tested for the example of waste minimization in the process of developing coatings. Based on the analysis of the survey questionnaire, the usability and benefits of various measures are demonstrated, namely from the point of view of their positive impact on structural and operational efficiency indicators. At the end of the article, a case study presents the success of the innovative approach in terms of 88% waste minimization and up to 48% time and cost reductions in the process of developing coatings. The proposed approach enables better choices to be made and the more efficient use of various measures, which can lead to more sustainable processes and improve the efficiency of enterprises.
Ključne besede: organizational changes, key performance indicators, measures, methods and techniques, sustainable processes, waste minimization
Objavljeno v DKUM: 02.04.2024; Ogledov: 135; Prenosov: 11
.pdf Celotno besedilo (2,34 MB)
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3.
The role of performance and environmental sustainability indicators in hotel competitiveness
Zorica Đurić, Jasna Potočnik Topler, 2021, izvirni znanstveni članek

Opis: Environmental protection and environmental sustainability are becoming increasingly important factors in the hotel business and their competitiveness, in a market that brings numerous benefits. Environmental sustainability is, increasingly, considered one of the most important functions of the hotel business, as well as communication and marketing, which attracts a larger number of guests. Some of the key aspects of hotel environmental sustainability are performance and environmental sustainability indicators, as well as hotel management of environmental performance in order to establish efficiency in that process. The principal question arising is how environmentally sustainable business affects hotel performance, and what are the most important indicators of the environmental hotel business. The aim of this article is to offer an insight into, and analysis of, performance and indicators of the environmental sustainability of hotels through the relevant literature. A case study from Serbia is used to point out the complexity and the significance of these indicators in the hotel business, as well as to emphasise the importance of environmental reports in the case of Serbia. The findings of our study are significant because they help hotel managers identify new opportunities for employing more sustainable processes for saving resources.
Ključne besede: sustainable business, tourism, performance, indicators, hotels, communication, marketing
Objavljeno v DKUM: 23.01.2024; Ogledov: 178; Prenosov: 8
.pdf Celotno besedilo (2,19 MB)
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4.
Energy Efficiency Indicators of a Single Unit House
Iztok Brinovar, Gregor Srpčič, Zdravko Praunseis, Sebastijan Seme, Bojan Štumberger, Miralem Hadžiselimović, 2019, objavljeni znanstveni prispevek na konferenci

Opis: This article deals with the evaluation of energy efficiency indicators of an older single unit house with the use of "KI energija 2017" software, which is widely used among qualified Slovenian experts authorized to carry out the energy performance assessments and issue an energy performance certificate. The energy performance analysis before and after the implementation of proposed measures has shown significant energy saving potential in renovation of existing buildings.
Ključne besede: energy efficiency, energy indicators, energy performance, building renovation, CO2 emissions
Objavljeno v DKUM: 04.12.2023; Ogledov: 387; Prenosov: 16
.pdf Celotno besedilo (18,06 MB)
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The Nexus between city livability and transportation in Lagos Metropolis, Nigeria
Ayobami Ademola Akanmu, Kolawole Taofeek Gbadamosi, Felix Kayode Omole, 2022, izvirni znanstveni članek

Opis: The livability of cities has been a matter of global concern in recent times. Importantly, the ease of mobility and accessibility in cities remained paramount factors in enhancing residents’ locational decisions and suitability. It is on this basis that this study examined the nexus between city livability and transportation in the Lagos Metropolis, Nigeria. Anchored on the concept of livability, the study descriptively and inferentially analyzed the results of 1264 questionnaires administered to residents based on key livability themes. The study revealed low satisfaction with the livability key performance indicators. Similarly, the study revealed that most of the assessed transportation infrastructure facilities are in poor condition and thus hinder the ease of commuting and livability in the city. The result of the regression analysis revealed that transportation infrastructure statistically influenced the livability of the Lagos metropolis. The study recommends the need for expedited proactive measures, particularly structural improvement in transportation infrastructure, towards improving the livability of the Lagos Metropolis.
Ključne besede: city livability, transportation, livability indicators, Lagos Metropolis
Objavljeno v DKUM: 13.07.2023; Ogledov: 252; Prenosov: 23
.pdf Celotno besedilo (1,42 MB)
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7.
Analysis and improvements of the mechanisms for cross-border interchange and activation of the regulating reserves : doctoral dissertation
Marcel Topler, 2022, doktorska disertacija

Opis: This Doctoral Thesis deals with the mechanisms for cross-border interchange and activation of the regulating reserves (RRs), i.e., Imbalance Netting Process (INP) and Cross-Border Activation of the RRs (CBRR), between participating Control Areas (CAs), to reduce the costs of balancing energy. The main objective of INP is to interchange the RRs between participating CAs with opposite signs of interchange power variation. In comparison, the main objective of CBRR is to activate the RRs in participating CAs with the same signs of interchange power variation. Both the INP and CBRR aim to release the RRs and reduce balancing energy as part of the power system's safe operation. The Thesis's main objective is to analyze the impact of the mechanisms for cross-border interchange and activation of the RRs on mutual oscillations of participating CAs and stability for small disturbances. The Thesis's secondary objective is to analyze the impact of the INP and CBRR on frequency quality, on the provision of Load-Frequency Control (LFC), on balancing energy and unintended exchange of energies between participating CAs. Frequency quality in Continental Europe (CE) has been declining in recent years, so it is important that the mechanisms for cross-border interchange and activation of the RRs do not further impair its quality. Both the classic INP and CBRR include a frequency-dependent contribution and, therefore, inherently affect the frequency response of the participating CAs, which is not discussed in the literature. Thus, the impact of the classic INP and CBRR on frequency quality and the provision of LFC is thoroughly evaluated with dynamic simulations of a three-CA test system and eigenvalue analysis of a two-CA system. It is demonstrated that both the classic INP and CBRR reduce the damping of the entire power system. Therefore, a modified implementation of the classic INP and CBRR is presented, and improved INP and CBRR are proposed, which have no impact on the mutual oscillations of participating CAs and stability for small disturbances. Furthermore, the dynamic simulations results confirm that the frequency quality can be improved by the classic INP and CBRR, although there are also cases where it can deteriorate. However, the improved INP and CBRR generally improve the frequency quality in all cases. The improved INP and CBRR also enhance the provision of LFC compared to the classic INP and CBRR. Moreover, the improved INP and CBRR reduce the unintended exchange of energies, thus increasing the economic effects of the INP's and CBRR's activation. The improved INP increases energy exchange, therefore positive economic benefits can be expected in comparison to the system with the classic INP. However, the improved CBRR reduces energy exchange, therefore positive economic benefits can be expected in comparison to the system with the classic CBRR, since energy exchange is paid by CA via bidding process.
Ključne besede: load-frequency control, imbalance netting, cross-border activation, balancing energy, regulating reserves, eigenvalue analysis, performance indicators, area control error, rate of change of frequency, control area
Objavljeno v DKUM: 09.03.2023; Ogledov: 454; Prenosov: 81
.pdf Celotno besedilo (14,64 MB)

8.
Development of a methodology to calibrate a pedestrian microsimulation model : doctoral dissertation
Chiara Gruden, 2022, doktorska disertacija

Opis: Walking, as a mode of transport, is becoming widespread, in a world, where urban conglomerates are broadening and becoming denser. Modern lifestyle trends on a side, and eco-friendly policies on the other, push people into walking habits, increasing the need for a suitable, attractive, accessible, connected and safe walking infrastructure. To reach such a result, it is necessary to understand, what are the needs of the users of this infrastructure, taking into consideration the behavioral specificities and the safety needs of pedestrians. In this process pedestrian microsimulation models, surrogate safety techniques, and technologies able to measure specific traits of pedestrian dynamics play a central role. The firsts allow to reproduce repeatedly in a virtual environment a specific infrastructure and to study the response of pedestrians. Nevertheless, to be accurate and efficient, they need to go through long and tedious calibration and validation processes, that are often seen as an important limitation by technicians. Surrogate safety techniques are methods, that are based on the concept, that it is possible to predict the safety level of a location, using near accidents. The main advantage of such techniques is that they are proactive. Till this moment, these techniques have been mainly applied to on-field measurements and are primarily centered on motorized road users. Less interest has been shown for vulnerable road users, especially for pedestrians, who have been less extensively studied. Finally, an element that could highly affect pedestrian safety is their reaction time. Nevertheless, its measurement has long been a big issue. Eye-tracking technology could be one of the solutions, allowing to analyze the directions and objects fixated by pedestrians. These listed issues are also the topics that are addressed by this research work. Focusing on the study of the action of pedestrians while crossing the road on an unsignalized crosswalk set on a roundabout entry leg, the dissertation thesis aims at studying the crossing time, reaction time and surrogate safety aspects typical of pedestrians at the recalled location. The main purpose of the research work is to develop a methodology to calibrate pedestrian Social Force Model at a selected location, using a specifically formulated neural network as a tool to fine-tune model's behavioral parameters. Eight parameters have been chosen to be fine-tuned, five of those are related to pedestrian behavior and three of them are related to car-following behavior. After the selection of input parameters, a feedforward network has been formulated. Its application in the framework of the whole calibration process has brought to considerably positive results, finding a combination of input parameters that improved the performance of the microsimulation model of 37 % in comparison to the default one. The outputs of the calibrated model have been used to calculate three measures of surrogate safety, and also in this case results demonstrated an improvement in the calculation of surrogate safety measures when using the calibrated outcomes in comparison to their calculation on the “default” model outputs. Finally, reaction time measurement and prediction have been addressed by the thesis, in order to be able to describe pedestrian crossing action in its completeness. Quantitative eye-tracking outputs have been the starting point for the calculation of pedestrian reaction time at different locations, and they allowed to create a database of behavioral, geometric, regulatory and flow characteristics, which was the foundation for the formulation of a new prediction model for pedestrian reaction time. The prediction model, which consists of a cascade-correlation neural network, gave a good response to the learning and generalization steps, turning a 74 % correlation between the measured reaction time values and the predicted ones, and being able to follow the variability of these values.
Ključne besede: pedestrian, microsimulation model, calibration, neural network, surrogate safety indicators, reaction time.
Objavljeno v DKUM: 03.10.2022; Ogledov: 753; Prenosov: 96
.pdf Celotno besedilo (5,93 MB)

9.
Performance indicators of management buyouts using the analytic hierarchy process method
Petra Grah, Vesna Čančer, Borut Bratina, 2018, izvirni znanstveni članek

Opis: Background and Purpose: In Slovenia, few management buyout (MBO) studies have been carried out. The focus was mostly on the motives for acquisition of companies and the success rate of the acquisitions. This paper aims to analyse the indicators which suggest an impending bankruptcy or financial restructuring of companies and explore how these indicators are different for successful and unsuccessful MBOs. Methodology: In the survey, we included 23 selected MBOs in Slovenia between 2005 and 2008, using the following financial and non-financial indicators: profitability, performance, solvency and liquidity, using the analytic hierarchy process method. The key aim of the survey was to use financial and non-financial indicators to study if target companies where bankruptcy or financial restructuring has not yet been initiated prevalently have higher aggregate values compared to those in which bankruptcy or financial restructuring procedures have already begun. Thus, we used the selected indicators to demonstrate one of the possible methods to predict the success of a particular MBO. Results: We found that in most examples of unsuccessful MBOs, target companies have poorer results in terms of performance, solvency and liquidity, when compared to successful MBOs. Based on the selected areas, we divided the results into four quarters. We found that most target companies where MBOs had been unsuccessful are ranked in a lower quarter than most of the target companies where the MBOs had been successful. Conclusion: The papers main contribution is the finding that the selected financial and non-financial indicators differ in cases of successful and unsuccessful MBOs. This knowledge helps us to find ways of avoiding these situations in the future.
Ključne besede: management buy-outs, management, bankruptcy models, financial and non-financial indicators, the analytic hierarchy process
Objavljeno v DKUM: 10.10.2018; Ogledov: 1412; Prenosov: 316
.pdf Celotno besedilo (634,12 KB)
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10.
Thinking in messages – determine key performance indicators and create environmental reports
Edeltraud Günther, Daria Meyr, Natalia Mikhalenok, Pavel Pervov, Elena Gerasimova, Iurii Kholopov, Elena Lukenyuk, 2016, samostojni znanstveni sestavek ali poglavje v monografski publikaciji

Opis: Environmental reporting aims to measure, disclose and to be accountable to internal and external stakeholders about to what extent the company uses the functions of the environment and takes action to improve environmental performance. Thus, the communication of a company has two objectives: for internal stakeholders’ environmental performance is measured in order to prepare decisions of corporate management, for external stakeholders the reporting on the environmental management system, the environmental performance, the ecology orientation of the value-added steps, the dealing with stakeholders and process and product innovations as well as environmental objectives are in the foreground. Finally, it should be noted that environmental reporting is increasingly part of sustainability reporting.
Ključne besede: environmental management, environmental reports, performance indicators
Objavljeno v DKUM: 11.05.2018; Ogledov: 1460; Prenosov: 83
.pdf Celotno besedilo (802,28 KB)
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