Sonja Išljamović - Academia.edu (original) (raw)

Papers by Sonja Išljamović

Research paper thumbnail of Ecological Footprint as a sustainability indicator to analyze energy consumption in a Portuguese textile facility

International Journal of Energy and Environmental Engineering, 2018

The main objective of this paper is to apply Ecological Footprint methodology as a tool to analyz... more The main objective of this paper is to apply Ecological Footprint methodology as a tool to analyze the Portuguese textile industry. This analysis is related to energy and resources consumption in dyeing, printing and finishing processes. It also includes identification of mitigation measures to increase energy efficiency, promoting at the same time the reduction of CO 2 emissions and consequently the decrease in industry's Ecological Footprint. Moreover, the analysis presents the Ecological Footprint reduction potential for each mitigation option proposed for an important textile facility located in the North Region of Portugal, used as a case study in this work. The results for the case study showed that the total Ecological Footprint accounted, for the year 2016, summed up to 4890 gha. Furthermore, the energy category corresponds to more than 50% of the total Ecological Footprint estimation, and natural gas was the most required fuel for the processes. The calculation of the Ecological Footprint in the textile facilities can be used as a tool to analyze the processes' energy efficiency and to quantify the global impact of the implementation of mitigation measures in the energy field. The result is an indicator shown in a common unit, gha (global hectare) and it can be easily used to compare energy-intensive processes and industrial sectors. In addition, it can be used to analyze how each sector can impact the country's total demand for resources.

Research paper thumbnail of Mobile Learning and Improvement of Environmental Education

Mobile learning or m-learning, as a relatively new concept, has attracted the interest of educato... more Mobile learning or m-learning, as a relatively new concept, has attracted the interest of educators, researchers and companies that are developing learning systems, but also creating and publishing instructional materials. In this paper we investigated the usage of integrative use of mobile technologies, data services and multimedia messaging systems for the increasing of students’ practice of mobile technologies with the aim to improve their environmental education level in the context of sustainable development. Environmental education can be defined as learning to protect and improve environment in a systematic, planned and knowledge-based way during the whole human lifecycle. Also, environmental education has the task to spread awareness about basic characteristics of environment, its structures and relationships that tends to make a human who protects and improves the environment in a way that will ensure humans’ existences now as well as in the future. It should also be pointe...

Research paper thumbnail of Application for Tracking Students’ Efficiency and Predicting Expectations Based on Current Results

Globalization and technological development are radically changing the landscape of higher educat... more Globalization and technological development are radically changing the landscape of higher education. Students increasingly expect to choose what they learn, how they learn and when they learn, according to their individual needs and interests. Computer applications in education system introduce unique technical, managerial and most importantly pedagogical issues. Using business discovery platform QlikView, application developed in this research, should be beneficial to both, students and professors at the university. The relation database model is based on data collected from student admission service of Faculty of Organizational Science, University of Belgrade. Application allows students to analyze current study success, but also to predict future performance success. In addition, students can use developed application as an advisor system, which can be useful in helping student plan for the upcoming semesters and also to be able to answer any questions that the student may have ...

Research paper thumbnail of Communal Waste Management: Case study for Slovenia

Management: Journal for Theory and Practice Management, 2011

The unprecedented quantities of waste produced today have critical environmental implications, fr... more The unprecedented quantities of waste produced today have critical environmental implications, from resource inefficiency and climate change to social injustice and local human health effects. In addition, the generation of waste has been one of the most prevalent byproducts of human activity in history. The old approaches of waste management as e.g. burying or dumping the waste, however, are no longer acceptable: environmentally, economically, or socially. Moreover, the predicted levels of increase in population, production, and consumption in this century will raise the quantity and complexity of waste materials. If global problems such as climate change and waste remain unresolved, societies will be forced to continue attempting to incrementally reduce waste and lessen environmental impacts. Logically, there is a need for sustainable waste management, sustainable communal waste management in particular, whose goal is to eliminate waste wherever possible by encouraging a systems a...

Research paper thumbnail of Predicting students' performance: Educational data mining approach

Applying data mining on data gathered from educational environments is a new, growing research ar... more Applying data mining on data gathered from educational environments is a new, growing research area also known as educational data mining (EDM). It is focused on developing models and methods for exploring data collected from educational environments. EDM considers different aspects of education: students, teachers, teaching materials, organization of classes in order to better understand and improve educational process. In this paper we use different data mining algorithms in order to find the best suited model for prediction of students' success at the end of their studies. These models are generated and evaluated on students' personal, high school, admission and first year grades data from Faculty of Organizational Sciences, University of Belgrade, who studied Information Systems and Technologies study program. Specifically, artificial neural networks, linear regression and support vector machines are applied on students' aforementioned data to generate the model, whi...

Research paper thumbnail of Indicators of Study Success Related to Impact of University Students' Enrollment Status / Pokazatelji uspješnosti studiranja u korelaciji s tipom financiranja prilikom upisa na fakultet

Croatian Journal of Education - Hrvatski časopis za odgoj i obrazovanje, 2016

Analyzing and determining patterns among indicators of academic success and their correlation to ... more Analyzing and determining patterns among indicators of academic success and their correlation to students' enrollment status can be a good foundation in the process of adapting and improving the curriculum of higher education institutions, according to students' characteristics. In this paper we analyzed variables (the completed study program, student's gender, type of previously finished secondary school and the region where they finished secondary school) and indicators of academic success (GPA and study time) and their dependence on the status of enrollment at university. The results of this research indicate that students who enrolled in the status of budget financing (SBF) achieve greater success in terms of GPA (higher GPA) and the average time required to complete the study (shorter average time of study) in comparison to students who enrolled in the faculty in the self-financing status.

Research paper thumbnail of Mogućnosti primene poslovne inteligencije za analizu i predviđanje uspeha studiranja

Research paper thumbnail of Early Prediction of University Students' Success via Neural Networks

Research paper thumbnail of Colouring the socio-economic development into green: I-distance framework for countries’ welfare evaluation

Quality & Quantity, 2014

ABSTRACT The indicator-based research papers represent a substantial part of socioeconomic sphere... more ABSTRACT The indicator-based research papers represent a substantial part of socioeconomic sphere, but the controversy about the choice of indicators and aggregation methods still remains. The aim of our paper is twofold: first, to elaborate the use of indicators in assessing socioeconomic development and welfare of countries, and in particular, to review the socioeconomic and welfare indicators in order to form a theoretical framework. Secondly, the idea of the paper is to emphasize the importance of incorporating environmental indicators into the evaluation of socioeconomic development. To this end we suggest the implementation of ecological footprint and environmental performance index, along with frequently used indicators such as GDP per capita, unemployment rate, etc. In addition, applying a statistical I-distance method we were able to overcome the problems concerning the aggregation of composite indicator using presumably biased weighting factors. As a case study we analyzed a dataset of 25 European Union countries, starting with 2007 and ending with the last available data of 2012. The results presented in this study clearly indicated EU countries with high level of socioeconomic development, with a special emphasis on the underlying dynamics of a five-year period. One of the contributions lies in the application of an I-distance method which can easily integrate economic, social and environmental variables with different measurement units into one composite indicator. Moreover, our approach could be a foundation for an appropriate framework of countries’ welfare evaluation which would be unbiased i.e. independent from subjectively formed weighting factors. The ecological footprint and environmental performance index as environmental indicators proved to be essential part of an I-distance framework for countries’ welfare evaluation.

Research paper thumbnail of Reusable Component-Based Architecture for Decision Tree Algorithm Design

International Journal on Artificial Intelligence Tools, 2012

Many decision tree algorithms were proposed over the last few decades. A lack of publishing stand... more Many decision tree algorithms were proposed over the last few decades. A lack of publishing standards for decision tree algorithm software produced a large time gap between algorithm proposals and their wider application in practice. Non-existence of common repository for storing algorithms and their parts led to a need to re-implement these algorithms from a scratch when they had to be implemented on a different platform. This makes the comparison between algorithms and their partial improvements vague. In addition, combinations and interactions between different algorithm parts haven't been analyzed thoroughly. Reusable component design of decision tree algorithms has been recently suggested as a potential solution to these problems. In this paper we describe an architecture for component-based (white-box) decision tree algorithm design, and we present an open-source framework which enables design and fair testing of decision tree algorithms and their parts. This architecture ...

Research paper thumbnail of Ekootisak kao indikator socio-ekonomske razvijenosti zemalja Evropske Unije

Research paper thumbnail of Merenje “dobrog” ekološkog obrazovanja

Research paper thumbnail of Carbon footprint management

Research paper thumbnail of A one concept for measuring results of environmental education for sustainability: ecological footprint

The Ecological Footprint is a complex sustainability indicator that answers a simple question: Ho... more The Ecological Footprint is a complex sustainability indicator that answers a simple question: How much of the Earth’s resources does humankind lifestyle require? Ecological Footprint translates this consumption and waste flow data into a measurement of the biologically productive area required to sustain that flow. So, the key aspect of this paper will be focused on the measuring of effective environmental education among the students of the Faculty of Organizational Science, University of Belgrade. For the determining of students environmental behavior modification (through appropriate environmental actions) was used a closed form questionnaire with 16 questions, which students filled out two times, in time span of six months, before attending the course of Environmental Management and a month after the completion of the course. Analysis of results has been performed in SPSS software package. In our scope of research, we focused on the variables EFP (Ecological Footprint) before and after attending course of Environmental Management. Before taking the course, EFP mean value was 1.213 ± 0.136. After attending a whole semester of classes, EFP value was 1.17 ± 0.159. Results indicated that statistically significant reduction of EFP value occurred, with t( 43 )=2.483, p<0.05.

Research paper thumbnail of Poboljšanje ekološke svesti studenata kroz primenu mobilnog učenja

Research paper thumbnail of Measuring students’ environmental awareness

Research paper thumbnail of Going Green: Cloud Computing and Sustainability

Research paper thumbnail of Methodological improvement for higher environmental education: a flexible approach

Successful implementation of sustainable development concepts at the higher education level requi... more Successful implementation of sustainable development concepts at the higher education level requires that undergraduates from higher learning institutions receive adequate environmental education and training in this field. This is because, environmental education fosters skills and habits that students can use throughout their lives to understand and act on sustainability topics. In the recent past, most of those institutions around the world have incorporated environmental issues in their curricula. In order to satisfy the specific needs of sustainable development implementations, higher learning institutions need to use new technologies to facilitate environmental education. The flexible learning approach used at Faculty of Organizational Sciences, University of Belgrade is one of these valuable tools. This paper introduces some of the key concepts of flexible learning and investigates how they can be effectively used in higher environmental education for sustainable development.

Research paper thumbnail of Towards an evaluation of sustainable development: a statistical approach

Research paper thumbnail of Technology enhanced learning as a key component of increased environmental awareness amongst students from the University of Belgrade

Technics Technologies Education Management - TTEM, 2011

ABSTRACT Environmental education fosters skills and habits that students can use throughout their... more ABSTRACT Environmental education fosters skills and habits that students can use throughout their lives to understand and act on environmental issues. The key aspect of this paper shall be focused on the measuring of effective environmental education through &quot;blended learning&quot; among students at the Faculty of Organizational Science, University of Belgrade. In this paper, the activities of students are compared over two academic years; the first without blended learning and the second with a blended learning platform. A closed form questionnaire for measuring individual ecological footprints has been used in this study to determine the students&#39; environmental behaviour modification (through corresponding environmental actions). An analysis of the results has been carried out using the SPSS software package and the results have indicated that a statistically significant increase of environmental awareness had indeed occurred.

Research paper thumbnail of Ecological Footprint as a sustainability indicator to analyze energy consumption in a Portuguese textile facility

International Journal of Energy and Environmental Engineering, 2018

The main objective of this paper is to apply Ecological Footprint methodology as a tool to analyz... more The main objective of this paper is to apply Ecological Footprint methodology as a tool to analyze the Portuguese textile industry. This analysis is related to energy and resources consumption in dyeing, printing and finishing processes. It also includes identification of mitigation measures to increase energy efficiency, promoting at the same time the reduction of CO 2 emissions and consequently the decrease in industry's Ecological Footprint. Moreover, the analysis presents the Ecological Footprint reduction potential for each mitigation option proposed for an important textile facility located in the North Region of Portugal, used as a case study in this work. The results for the case study showed that the total Ecological Footprint accounted, for the year 2016, summed up to 4890 gha. Furthermore, the energy category corresponds to more than 50% of the total Ecological Footprint estimation, and natural gas was the most required fuel for the processes. The calculation of the Ecological Footprint in the textile facilities can be used as a tool to analyze the processes' energy efficiency and to quantify the global impact of the implementation of mitigation measures in the energy field. The result is an indicator shown in a common unit, gha (global hectare) and it can be easily used to compare energy-intensive processes and industrial sectors. In addition, it can be used to analyze how each sector can impact the country's total demand for resources.

Research paper thumbnail of Mobile Learning and Improvement of Environmental Education

Mobile learning or m-learning, as a relatively new concept, has attracted the interest of educato... more Mobile learning or m-learning, as a relatively new concept, has attracted the interest of educators, researchers and companies that are developing learning systems, but also creating and publishing instructional materials. In this paper we investigated the usage of integrative use of mobile technologies, data services and multimedia messaging systems for the increasing of students’ practice of mobile technologies with the aim to improve their environmental education level in the context of sustainable development. Environmental education can be defined as learning to protect and improve environment in a systematic, planned and knowledge-based way during the whole human lifecycle. Also, environmental education has the task to spread awareness about basic characteristics of environment, its structures and relationships that tends to make a human who protects and improves the environment in a way that will ensure humans’ existences now as well as in the future. It should also be pointe...

Research paper thumbnail of Application for Tracking Students’ Efficiency and Predicting Expectations Based on Current Results

Globalization and technological development are radically changing the landscape of higher educat... more Globalization and technological development are radically changing the landscape of higher education. Students increasingly expect to choose what they learn, how they learn and when they learn, according to their individual needs and interests. Computer applications in education system introduce unique technical, managerial and most importantly pedagogical issues. Using business discovery platform QlikView, application developed in this research, should be beneficial to both, students and professors at the university. The relation database model is based on data collected from student admission service of Faculty of Organizational Science, University of Belgrade. Application allows students to analyze current study success, but also to predict future performance success. In addition, students can use developed application as an advisor system, which can be useful in helping student plan for the upcoming semesters and also to be able to answer any questions that the student may have ...

Research paper thumbnail of Communal Waste Management: Case study for Slovenia

Management: Journal for Theory and Practice Management, 2011

The unprecedented quantities of waste produced today have critical environmental implications, fr... more The unprecedented quantities of waste produced today have critical environmental implications, from resource inefficiency and climate change to social injustice and local human health effects. In addition, the generation of waste has been one of the most prevalent byproducts of human activity in history. The old approaches of waste management as e.g. burying or dumping the waste, however, are no longer acceptable: environmentally, economically, or socially. Moreover, the predicted levels of increase in population, production, and consumption in this century will raise the quantity and complexity of waste materials. If global problems such as climate change and waste remain unresolved, societies will be forced to continue attempting to incrementally reduce waste and lessen environmental impacts. Logically, there is a need for sustainable waste management, sustainable communal waste management in particular, whose goal is to eliminate waste wherever possible by encouraging a systems a...

Research paper thumbnail of Predicting students' performance: Educational data mining approach

Applying data mining on data gathered from educational environments is a new, growing research ar... more Applying data mining on data gathered from educational environments is a new, growing research area also known as educational data mining (EDM). It is focused on developing models and methods for exploring data collected from educational environments. EDM considers different aspects of education: students, teachers, teaching materials, organization of classes in order to better understand and improve educational process. In this paper we use different data mining algorithms in order to find the best suited model for prediction of students' success at the end of their studies. These models are generated and evaluated on students' personal, high school, admission and first year grades data from Faculty of Organizational Sciences, University of Belgrade, who studied Information Systems and Technologies study program. Specifically, artificial neural networks, linear regression and support vector machines are applied on students' aforementioned data to generate the model, whi...

Research paper thumbnail of Indicators of Study Success Related to Impact of University Students' Enrollment Status / Pokazatelji uspješnosti studiranja u korelaciji s tipom financiranja prilikom upisa na fakultet

Croatian Journal of Education - Hrvatski časopis za odgoj i obrazovanje, 2016

Analyzing and determining patterns among indicators of academic success and their correlation to ... more Analyzing and determining patterns among indicators of academic success and their correlation to students' enrollment status can be a good foundation in the process of adapting and improving the curriculum of higher education institutions, according to students' characteristics. In this paper we analyzed variables (the completed study program, student's gender, type of previously finished secondary school and the region where they finished secondary school) and indicators of academic success (GPA and study time) and their dependence on the status of enrollment at university. The results of this research indicate that students who enrolled in the status of budget financing (SBF) achieve greater success in terms of GPA (higher GPA) and the average time required to complete the study (shorter average time of study) in comparison to students who enrolled in the faculty in the self-financing status.

Research paper thumbnail of Mogućnosti primene poslovne inteligencije za analizu i predviđanje uspeha studiranja

Research paper thumbnail of Early Prediction of University Students' Success via Neural Networks

Research paper thumbnail of Colouring the socio-economic development into green: I-distance framework for countries’ welfare evaluation

Quality & Quantity, 2014

ABSTRACT The indicator-based research papers represent a substantial part of socioeconomic sphere... more ABSTRACT The indicator-based research papers represent a substantial part of socioeconomic sphere, but the controversy about the choice of indicators and aggregation methods still remains. The aim of our paper is twofold: first, to elaborate the use of indicators in assessing socioeconomic development and welfare of countries, and in particular, to review the socioeconomic and welfare indicators in order to form a theoretical framework. Secondly, the idea of the paper is to emphasize the importance of incorporating environmental indicators into the evaluation of socioeconomic development. To this end we suggest the implementation of ecological footprint and environmental performance index, along with frequently used indicators such as GDP per capita, unemployment rate, etc. In addition, applying a statistical I-distance method we were able to overcome the problems concerning the aggregation of composite indicator using presumably biased weighting factors. As a case study we analyzed a dataset of 25 European Union countries, starting with 2007 and ending with the last available data of 2012. The results presented in this study clearly indicated EU countries with high level of socioeconomic development, with a special emphasis on the underlying dynamics of a five-year period. One of the contributions lies in the application of an I-distance method which can easily integrate economic, social and environmental variables with different measurement units into one composite indicator. Moreover, our approach could be a foundation for an appropriate framework of countries’ welfare evaluation which would be unbiased i.e. independent from subjectively formed weighting factors. The ecological footprint and environmental performance index as environmental indicators proved to be essential part of an I-distance framework for countries’ welfare evaluation.

Research paper thumbnail of Reusable Component-Based Architecture for Decision Tree Algorithm Design

International Journal on Artificial Intelligence Tools, 2012

Many decision tree algorithms were proposed over the last few decades. A lack of publishing stand... more Many decision tree algorithms were proposed over the last few decades. A lack of publishing standards for decision tree algorithm software produced a large time gap between algorithm proposals and their wider application in practice. Non-existence of common repository for storing algorithms and their parts led to a need to re-implement these algorithms from a scratch when they had to be implemented on a different platform. This makes the comparison between algorithms and their partial improvements vague. In addition, combinations and interactions between different algorithm parts haven't been analyzed thoroughly. Reusable component design of decision tree algorithms has been recently suggested as a potential solution to these problems. In this paper we describe an architecture for component-based (white-box) decision tree algorithm design, and we present an open-source framework which enables design and fair testing of decision tree algorithms and their parts. This architecture ...

Research paper thumbnail of Ekootisak kao indikator socio-ekonomske razvijenosti zemalja Evropske Unije

Research paper thumbnail of Merenje “dobrog” ekološkog obrazovanja

Research paper thumbnail of Carbon footprint management

Research paper thumbnail of A one concept for measuring results of environmental education for sustainability: ecological footprint

The Ecological Footprint is a complex sustainability indicator that answers a simple question: Ho... more The Ecological Footprint is a complex sustainability indicator that answers a simple question: How much of the Earth’s resources does humankind lifestyle require? Ecological Footprint translates this consumption and waste flow data into a measurement of the biologically productive area required to sustain that flow. So, the key aspect of this paper will be focused on the measuring of effective environmental education among the students of the Faculty of Organizational Science, University of Belgrade. For the determining of students environmental behavior modification (through appropriate environmental actions) was used a closed form questionnaire with 16 questions, which students filled out two times, in time span of six months, before attending the course of Environmental Management and a month after the completion of the course. Analysis of results has been performed in SPSS software package. In our scope of research, we focused on the variables EFP (Ecological Footprint) before and after attending course of Environmental Management. Before taking the course, EFP mean value was 1.213 ± 0.136. After attending a whole semester of classes, EFP value was 1.17 ± 0.159. Results indicated that statistically significant reduction of EFP value occurred, with t( 43 )=2.483, p<0.05.

Research paper thumbnail of Poboljšanje ekološke svesti studenata kroz primenu mobilnog učenja

Research paper thumbnail of Measuring students’ environmental awareness

Research paper thumbnail of Going Green: Cloud Computing and Sustainability

Research paper thumbnail of Methodological improvement for higher environmental education: a flexible approach

Successful implementation of sustainable development concepts at the higher education level requi... more Successful implementation of sustainable development concepts at the higher education level requires that undergraduates from higher learning institutions receive adequate environmental education and training in this field. This is because, environmental education fosters skills and habits that students can use throughout their lives to understand and act on sustainability topics. In the recent past, most of those institutions around the world have incorporated environmental issues in their curricula. In order to satisfy the specific needs of sustainable development implementations, higher learning institutions need to use new technologies to facilitate environmental education. The flexible learning approach used at Faculty of Organizational Sciences, University of Belgrade is one of these valuable tools. This paper introduces some of the key concepts of flexible learning and investigates how they can be effectively used in higher environmental education for sustainable development.

Research paper thumbnail of Towards an evaluation of sustainable development: a statistical approach

Research paper thumbnail of Technology enhanced learning as a key component of increased environmental awareness amongst students from the University of Belgrade

Technics Technologies Education Management - TTEM, 2011

ABSTRACT Environmental education fosters skills and habits that students can use throughout their... more ABSTRACT Environmental education fosters skills and habits that students can use throughout their lives to understand and act on environmental issues. The key aspect of this paper shall be focused on the measuring of effective environmental education through &quot;blended learning&quot; among students at the Faculty of Organizational Science, University of Belgrade. In this paper, the activities of students are compared over two academic years; the first without blended learning and the second with a blended learning platform. A closed form questionnaire for measuring individual ecological footprints has been used in this study to determine the students&#39; environmental behaviour modification (through corresponding environmental actions). An analysis of the results has been carried out using the SPSS software package and the results have indicated that a statistically significant increase of environmental awareness had indeed occurred.