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Dr. Karmen Pažek
University of Maribor, Faculty of agriculture and life science, Department of agricultural economics and rural development, Slovenia

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0 Decision Support
0 Project Appraisal
0 multicriteria analysis
0 Farm management
0 Option modeling

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Journal article
Published: 06 May 2020 in Sustainability
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In this paper, the quality of the municipal waste sorting process in seven waste management centers in Slovenia was assessed using the qualitative multicriteria analysis (MCA) method DEX (Decision EXpert) implemented in DEXi software, which is based on multicriteria decomposition of the problem and utility functions in the form of “if–then” decision rules. The study was based on eight types of secondary raw materials. The quality of the secondary raw materials, the regularity of the delivery of secondary raw materials to recycling units based on the sorting efficiency, and the loading weight of the individual baled fractions in the transport of secondary raw materials for recycling were the main parameters used in the model. The final assessment shows “good” waste management service in centers A and D. Centers B, C, and F were rated “average”. The “bad” rating was assigned to centers E and G.

ACS Style

Karmen Pažek; Jernej Prišenk; Simon Bukovski; Boris Prevolšek; Črtomir Rozman. Multicriteria Assessment of the Quality of Waste Sorting Centers—A Case Study. Sustainability 2020, 12, 3780 .

AMA Style

Karmen Pažek, Jernej Prišenk, Simon Bukovski, Boris Prevolšek, Črtomir Rozman. Multicriteria Assessment of the Quality of Waste Sorting Centers—A Case Study. Sustainability. 2020; 12 (9):3780.

Chicago/Turabian Style

Karmen Pažek; Jernej Prišenk; Simon Bukovski; Boris Prevolšek; Črtomir Rozman. 2020. "Multicriteria Assessment of the Quality of Waste Sorting Centers—A Case Study." Sustainability 12, no. 9: 3780.

Journal article
Published: 14 February 2020 in Sustainability
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This paper explores ethno-villages in Bosnia and Herzegovina as an important element of rural and cultural tourism. The attractiveness of natural and cultural heritage is very important for sustainable rural tourism development. In order to improve the process of decision making to enable the sustainable development of ethno-villages, a multi-criteria assessment model has been developed. The methodology is based on qualitative modeling using a multi-criteria analysis via the DEXi software. The model is based on hierarchical relations consisting of three main criteria that are the basis of sustainable tourism development: economic, social, and environmental criteria. The ultimate goal of the model in this study was to evaluate ethno-villages, namely six ethno-villages in Bosnia and Herzegovina. The results of the study show how ethno-villages contribute to sustainable development.

ACS Style

Boris Prevolšek; Aleksandar Maksimović; Adis Puška; Karmen Pažek; Maja Žibert; Črtomir Rozman. Sustainable Development of Ethno-Villages in Bosnia and Herzegovina—A Multi Criteria Assessment. Sustainability 2020, 12, 1399 .

AMA Style

Boris Prevolšek, Aleksandar Maksimović, Adis Puška, Karmen Pažek, Maja Žibert, Črtomir Rozman. Sustainable Development of Ethno-Villages in Bosnia and Herzegovina—A Multi Criteria Assessment. Sustainability. 2020; 12 (4):1399.

Chicago/Turabian Style

Boris Prevolšek; Aleksandar Maksimović; Adis Puška; Karmen Pažek; Maja Žibert; Črtomir Rozman. 2020. "Sustainable Development of Ethno-Villages in Bosnia and Herzegovina—A Multi Criteria Assessment." Sustainability 12, no. 4: 1399.

Book chapter
Published: 03 January 2019 in Agricultural Robots - Fundamentals and Applications
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In this chapter, we present and evaluate three different infield navigation algorithms, based on the readings from a LIDAR sensor. All three algorithms are tested on a small field robot and used to autonomously drive the robot between the two adjacent rows of maze plants. The first algorithm is the simplest one and just takes distance readings from the left and right side. If robot is not in the center of the mid-row space, it adjusts its course by turning the robot in the right direction accordingly. The second approach groups the left and right readings into two vertical lines by using least-square fit approach. According to the calculated distance and orientation to both lines, it adjusts the course of the robot. The third approach tries to fit an optimal triangle between the robot and the plants, revealing the most optimal one. Based on its shape, the course of the robot is adjusted. All three algorithms are tested in a simulated (ROS stage) and then in an outdoor (maze test field) environment comparing the optimal line with the actual calculated position of the robot. The tests prove that all three approaches work with an error of 0.041 ± 0.034 m for the first algorithm, 0.07 ± 0.059 m for the second, and 0.078 ± 0.055 m error for the third.

ACS Style

Peter Bernad; Peter Lepej; Črtomir Rozman; Karmen Pažek; Jurij Rakun. An Evaluation of Three Different Infield Navigation Algorithms. Agricultural Robots - Fundamentals and Applications 2019, 1 .

AMA Style

Peter Bernad, Peter Lepej, Črtomir Rozman, Karmen Pažek, Jurij Rakun. An Evaluation of Three Different Infield Navigation Algorithms. Agricultural Robots - Fundamentals and Applications. 2019; ():1.

Chicago/Turabian Style

Peter Bernad; Peter Lepej; Črtomir Rozman; Karmen Pažek; Jurij Rakun. 2019. "An Evaluation of Three Different Infield Navigation Algorithms." Agricultural Robots - Fundamentals and Applications , no. : 1.

Journal article
Published: 01 August 2017 in orga
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Background and Purpose: The purpose of this study is to describe the principles of the development of parallel system-dynamics and agent-based models of organic farming for the case of Slovenia. The advantage of agent-based modeling is demonstrated by including geospatial information as an agent attribute. The models were compared by the validation, confirming the appropriate level of similarity. Design/Methodology/Approach: Both system-dynamics and agent-based modeling approaches were applied. Statistical methods were used in the validation. Results: The results of the validation confirm the appropriateness of the proposed agent-based model. Introducing additional attributes into the agent-based model provides an important advantage over the system-dynamics model, which serves as the paradigmatic example. Conclusion: A thorough validation and comparison of the results of the system-dynamics and agent-based models indicates the proper approach to combining the methodologies. This approach is promising, because it enables the modeling of the entire agricultural sector, taking each particular farm into account.

ACS Style

Črtomir Rozman; Andrej Škraba; Karmen Pažek; Davorin Kofjač. Validation of Agent-based Approach for Simulating the Conversion to Organic Farming. orga 2017, 50, 235 -242.

AMA Style

Črtomir Rozman, Andrej Škraba, Karmen Pažek, Davorin Kofjač. Validation of Agent-based Approach for Simulating the Conversion to Organic Farming. orga. 2017; 50 (3):235-242.

Chicago/Turabian Style

Črtomir Rozman; Andrej Škraba; Karmen Pažek; Davorin Kofjač. 2017. "Validation of Agent-based Approach for Simulating the Conversion to Organic Farming." orga 50, no. 3: 235-242.

Book chapter
Published: 31 August 2016 in Applications and Theory of Analytic Hierarchy Process - Decision Making for Strategic Decisions
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ACS Style

Monica Huehner; Črtomir Rozman; Karmen Pažek. A Case Study on the Application of the Analytic Hierarchy Process (AHP) to Assess Agri-Environmental Measures of the Rural Development Programme (RDP 2007–2013) in Slovenia. Applications and Theory of Analytic Hierarchy Process - Decision Making for Strategic Decisions 2016, 1 .

AMA Style

Monica Huehner, Črtomir Rozman, Karmen Pažek. A Case Study on the Application of the Analytic Hierarchy Process (AHP) to Assess Agri-Environmental Measures of the Rural Development Programme (RDP 2007–2013) in Slovenia. Applications and Theory of Analytic Hierarchy Process - Decision Making for Strategic Decisions. 2016; ():1.

Chicago/Turabian Style

Monica Huehner; Črtomir Rozman; Karmen Pažek. 2016. "A Case Study on the Application of the Analytic Hierarchy Process (AHP) to Assess Agri-Environmental Measures of the Rural Development Programme (RDP 2007–2013) in Slovenia." Applications and Theory of Analytic Hierarchy Process - Decision Making for Strategic Decisions , no. : 1.

Journal article
Published: 01 May 2014 in orga
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Background: The sugar beet is the main field crop used for sugar production in the temperate climatic zone. The abolishment of the quota system will open new investment opportunities in countries that were forced to abandon sugar industry as the result of the reform in 2006. Present paper describes the modeling of sugar beet production and its processing into sugar for purpose of decision support. Methods: A system dynamics methodology was chosen to model impacts of regional sugar factory investment. We present two basic concepts of system dynamics models at causal loop diagram level. The first holistic model deals with regional planning of new product development and the second one deals with factory model. Results: The holistic model presented main feedback loops and dynamics of main elements in the case of regional investment into sugar industry. The factory model considered the specifics of the beet processing which is a) limited period of beet processing and b) initial adjustment to the production capacity at the start of the production season Conclusions: The model seeks answers to strategic questions related to the whole sugar beet production and processing system and will be used for simulation of different scenarios for sugar production and their impact on economic and environmental parameters at an aggregate level.

ACS Style

Črtomir Rozman; Andrej Škraba; Karmen Pažek; Miroljub Kljajić. The Development of Sugar Beet Production and Processing Simulation Model – a System Dynamics Approach to Support Decision-Making Processes. orga 2014, 47, 99 -105.

AMA Style

Črtomir Rozman, Andrej Škraba, Karmen Pažek, Miroljub Kljajić. The Development of Sugar Beet Production and Processing Simulation Model – a System Dynamics Approach to Support Decision-Making Processes. orga. 2014; 47 (2):99-105.

Chicago/Turabian Style

Črtomir Rozman; Andrej Škraba; Karmen Pažek; Miroljub Kljajić. 2014. "The Development of Sugar Beet Production and Processing Simulation Model – a System Dynamics Approach to Support Decision-Making Processes." orga 47, no. 2: 99-105.

Book chapter
Published: 01 January 2014 in DAAAM International Scientific Book 2013
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ACS Style

Janzekovic M.; Rozman C.; Pazek K.; Pevec P.. Mathematical Model for Balancing Feed Rations in Dairy Cows. DAAAM International Scientific Book 2013 2014, 13, 153 -162.

AMA Style

Janzekovic M., Rozman C., Pazek K., Pevec P.. Mathematical Model for Balancing Feed Rations in Dairy Cows. DAAAM International Scientific Book 2013. 2014; 13 ():153-162.

Chicago/Turabian Style

Janzekovic M.; Rozman C.; Pazek K.; Pevec P.. 2014. "Mathematical Model for Balancing Feed Rations in Dairy Cows." DAAAM International Scientific Book 2013 13, no. : 153-162.

Journal article
Published: 14 June 2013 in Computers and Electronics in Agriculture
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In this paper a system dynamics model for organic farming development to support government decision making is presented. The system incorporates relevant variables which affect organic farming development. The user seeks answers to strategic questions related to the level of organic farming development achievable in a long term dynamic horizon. The model’s basic structure is fully described and results are presented which show that the conversion process relies mainly on subsidies and self-organization resources. User can simulate different policy scenarios for organic farming and for assessing their impact on the economic and environmental parameters of organic production at aggregate level. After performing several simulation scenarios we discovered that conversion to organic farming relies on subsidies which provide the main motivation for conversion from conventional farming to organic farming. However, the subsidies are not the only driving force in the system, even more important are activities that promote organic farming, since sufficiently large subsidies could not be provided in order to complete the conversion from conventional to organic farming to the extent desired. Another important feature is food demand, determined by population size, which negatively influences the conversion to organic farming due to the increased demand leading to increased food prices.

ACS Style

Črtomir Rozman; Karmen Pažek; Miroljub Kljajić; Martina Bavec; Jernej Turk; Franc Bavec; Davorin Kofjač; Andrej Škraba. The dynamic simulation of organic farming development scenarios – A case study in Slovenia. Computers and Electronics in Agriculture 2013, 96, 163 -172.

AMA Style

Črtomir Rozman, Karmen Pažek, Miroljub Kljajić, Martina Bavec, Jernej Turk, Franc Bavec, Davorin Kofjač, Andrej Škraba. The dynamic simulation of organic farming development scenarios – A case study in Slovenia. Computers and Electronics in Agriculture. 2013; 96 ():163-172.

Chicago/Turabian Style

Črtomir Rozman; Karmen Pažek; Miroljub Kljajić; Martina Bavec; Jernej Turk; Franc Bavec; Davorin Kofjač; Andrej Škraba. 2013. "The dynamic simulation of organic farming development scenarios – A case study in Slovenia." Computers and Electronics in Agriculture 96, no. : 163-172.