bluuebunny/crossref_metadata_2025 huggingface dataset:
Medicinal plants in dermatological complaints and disorders
Authors: Grigorov Maja , Kitić Dušanka , Pavlović Dragana
Published: January 2023

The term "phytopreparations" indicates products with active substances obtained from medicinal plants. Herbal medicines, extracts, essential oils, and isolated active principles are present in both cosmetology and dermatology. The new term, "cosmeceutical" refers to cosmetic preparations which also have therapeutic action. A review of relevant literature and legal frames has been done in order to understand the modern use of medicinal herbs in dermatological disorders. There is no single legal framework in this area. In the therapeutic field of skin disorders and minor wounds, there are 31 European Union monographs on herbal medicinal products prepared by the Committee on Herbal Medicinal Products, while the European Scientific Cooperative on Phytotherapy recommends the use of 19 herbal drugs for dermatological disorders, such as acne, dermatitis, eczema, wounds, skin inflammation, insect bites, etc. Most patients assume an herbal product is "safe" and without side effects simply because it's natural. The rational use of herbal cosmetic products requires appropriate knowledge of used plant materials and potential side effects.
The plants traditionally used for the treatment of respiratory infections in the Balkan Peninsula (Southeast Europe)
Authors: Marković Marija , Pljevljakušić Dejan , Matejić Jelena , Nikolić Biljana , Smiljić Mirjana , Ðelić Gorica , Papović Olivera , Ðokić Mrđan , Stankov-Jovanović Vesna
Published: January 2023

Our study's objective was to systematize knowledge and traditional usage of plants against respiratory infections among the population in Serbia, based on literature data, and compare these results with published ethnomedicinal studies conducted in other territories of Balkan region. The study aimed to produce a review that can be a basis for further investigation, which may eventually lead to anti-viral agents' development. The ethnobotanical surveys we comprised in this review include 18 localities dispersed across the Balkan Peninsula, including the rural regions of Greece, Albania, Bosnia and Herzegovina, Serbia, and Montenegro. These surveys identified 213 plants from 57 families represented in the folk medicine of the studied region. The primary indications of reported plant taxa in ethnobotanical studies in the Balkan Peninsula were cough; common cold and cold prevention; pneumonia and pulmonary diseases, bronchitis, asthma, bronchial catarrh, chest pain; fever, headache, influenza; sore throat, laryngitis, pharyngitis, sinusitis, and inhalation; respiratory infections and respiratory diseases in general, and tuberculosis. Presented knowledge on the traditional use of plants against respiratory infections may serve as a basis and helpful guide for selecting plants that deserve new pharmacological and clinical studies, which may eventually lead to the development of efficient antimicrobial and anti-viral medicinal products.
Biological activity of the birch leaf and bark
Authors: Dragicević Anđela , Kitić Dušanka , Pavlović Dragana
Published: January 2023

Birch leaves and bark are traditionally used for folk medicine for centuries. Numerous research focused on the chemical composition and biological effects of birch extracts. The main pharmacologically active compounds found in extracts are flavonoids, saponins, tannins, essential oil, and triterpenes. Different species, age of the plant, geographical region, extraction methods, and analytical techniques influence the chemical composition. Possible role of birch extracts in preventing and treating numerous diseases is enabled by their diuretic, antimicrobial, anti-inflammatory, and anti-allergic activity. Therefore, this article is intended to give a general overview of the studies on birch leaves and bark.
Teaching refugee children: Challenges teachers face
Authors: Antonijadu Eleni , Palajologlu Nektarija , Karanikola Zoe
Published: January 2023

Educating refugee children is a demanding process, as teachers must have special knowledge, skills and attitudes. In Greece, many efforts have been made to educate refugee children by creating refugee reception and integration classes in schools and recruiting temporary staff. Still, teachers face various problems in language teaching and children's integration into the school environment. The purpose of this study is to identify the challenges and difficulties faced by teachers who teach refugee students and to explore their intercultural competence and readiness. Eight interviews were conducted for the research. The results show that participants face many problems due to a lack of training material, tools and resources. The characteristics of refugee children slow down the educational process, while the unpreparedness and inadequacy of teachers in intercultural education complicate the situation. However, the education of refugees can be improved, provided that the intercultural education of teachers is enriched and appropriate educational material (school books, guides, toolkits) is provided.
Student engagement in online and face-to-face classes in times of pandemic
Authors: Simić Nataša , Mojović-Zdravković Kristina , Ignjatović Natalija
Published: January 2023

Since the outbreak of the COVID-19 pandemic several studies on students' access to remote education and their perceptions of remote education have been conducted, but mixed-method studies on student engagement in an online setting are lacking. The aim of this study was to determine and compare the levels of school engagement in synchronous online classes and in face-to-face classes. Secondary school students (N = 132, 81.8% female, Mage = 16.3) filled out an online questionnaire comprising the School Engagement Measure Questionnaire (addressing online and face-to-face settings) and one open-ended question on the perception of differences between online and face-to-face classes. Statistical analyses showed that students were more engaged in face-to-face classes than in online classes (F (1, 131) = 106.316, p = .000, e2 = .448), with the best achievers having the highest decrease of engagement in online classes. A thematic analysis of answers yielded four themes, named: active learning (f = 42), learning strategies and resources (15), time organization (15) and assessment (6). Evaluative analysis showed that different students described the same themes in different ways - while in some cases active learning in online classes was higher, for the majority - it decreased; while some students organized their time for studying more effectively in an online setting, others were more efficient in a face-to-face setting. It can be concluded that negative effects of online classes on students' learning strategies and engagement prevail and that teachers need additional support in organizing individualized and differentiated teaching to encourage higher levels of engagement and self-regulation in emergency remote education.
Differences in the attitudes of mathematics teachers and of students towards online mathematics instruction
Authors: Milenković Aleksandar , Aleksić Suzana , Saković Anica
Published: January 2023

The aim of the research presented in this paper was to examine the potential differences (and similarities) between the attitudes of mathematics teachers and of students towards several aspects of online instruction. Our convenience sample comprised a total of 532 students in grades 5-8 of primary school and high school students as well as 110 mathematics teachers, who rated their attitudes and views on these questions on a Likert scale, using a Google Forms questionnaire. The results of the survey suggest that there is no significant difference between the attitudes of students and teachers regarding teachers' skills in online teaching, while teachers tend to believe that students are less well prepared for the effective implementation of online mathematics instruction than students themselves think. Also, a far greater percentage of students than mathematics teachers believe that online mathematics instruction is effective, and that they can successfully acquire the appropriate mathematical knowledge and skills through online instruction. The results also indicate that students tend to rate different types of mathematics classes much more highly (teaching, practice, revision and assessment) than teachers do.
The sense of school belonging: Its importance for the positive development of students and prevention of behavioural problems
Authors: Stojanović Marija , Popović-Ćitić Branislava
Published: January 2023

The sense of school belonging is defined as the extent to which students feel personally accepted, respected, included and supported by others in the school environment. Given that certain authors regard school belonging as the key factor in the adequate development of children and youth, this paper aims to summarize and present theoretical and research findings that testify to the importance of the sense of school belonging for students' positive development and prevention of behavioral problems. In addition, the basic tenets of prevention science and the positive development perspective are discussed, and the relationship between these two approaches is analyzed. The results of our review suggest that the sense of school belonging is related to a wide range of academic and developmental outcomes, such as academic achievement and motivation, school engagement, prosocial behavior, life satisfaction, self-esteem, positive identity, well-being, adaptive adjustment, etc. In other words, past research has indicated that, depending on the extent to which the sense of school belonging is developed, its effects can be interpreted within the context of risk and protective/promotion factors in students' mental health and behavioral problems. The above implies that actors in the education system must not lose sight of the importance of the sense of school belonging for students' reaching their full potential. Moreover, taking into account the striving of prevention science to identify and enhance the factors underpinning protective processes, further research is needed on the factors and mechanisms of development of the sense of school belonging.
Advantages and challenges of dual education in the development of the professional identity of engineers
Authors: Dukić-Mijatović Marijana , Mirković Predrag
Published: January 2023

The authors consider the strategic directions of the development of higher education in Republic of Serbia, especially in the light of legislative news regulating dual education at higher education institutions. In this context, they have paid a special attention to the analysis of legal acts and by-laws important for the development of the professional identity of engineers educated under the dual model of education. They have also perceived the number and structure of accredited study programs at higher education institutions in our country, which represent significant indicators of the direction of the development of the domestic economy mapped through the interest of employers for the engineers educated according to the dual model. So, we can conclude that there is an obvious influence of the fourth industrial revolution and the information age on all aspects of the society. Starting from all those changes that are happening and will happen, the Government of Republic of Serbia adopted the Education Strategy for the period from 2021 to 2030, in which there are given the vision, goals, and principles of education in the future. Talking about the dual model of higher education, the most important act is the Law on the Dual Model of Studies in Higher Education being in the focus of the authors in this research.
The causes of economic crime and the review of its effects in the business field
Authors: Matijašević Jelena , Lakićević Snežana
Published: January 2023

Economic crime is a serious security risk, which is present in every country. The factors of current economic, social and broader societal conditions of global trends are considered to be the general factors contributing to the causes of economic crime. If a country's economic system is established on solid foundations, fully respecting the market economy laws, such a system is less exposed to various forms of criminal attacks. Bearing in mind the importance as well as the complexity of the matter of economic crime, this academic paper deals with the etiology of economic crime as a phenomenon. The study includes a general criminological review of the above-mentioned topic, with a special emphasis on the review of the economic crime causes in Republic of Serbia. It is evident that the emergence and development of new types of economic crime, as well as the refinement of already existing ones, have had a significant impact on the operations of business entities and on the national economy as a whole. The causes of economic crime that are deeply rooted in a particular society have an extremely negative impact on the trust given to business entities and their stable operations. The roots and causes of economic crime are based on the contradictions of socioeconomic relations, which affect the outward forms of this kind of crime, and represent the result of a series of political, economic, geographical, legal, moral, cultural and other factors, which fundamentally negatively affects the overall economic stability.
Profiling of online pedophiles
Authors: Bjelajac Željko , Filipović Aleksandar
Published: January 2023

Paraphilias represent a group of disorders characterized by a pathological sexual tendency or anomaly, with the impulses including intense sexual fantasies and urges that keep returning in regard to the unusual objects, activities, circumstances, and/or certain category such as the children. Pedophilia belongs to this group of disorders and it is alternatively labeled as a pedophile disorder, which includes specific incriminated actions, which in addition to prison sentences, generally result in a social stigmatization of not only perpetrators but victims too. It is a sexual affinity disorder mostly found in adults who have expressed sexual fantasies and a tendency to enter the sexual relations with children of the same or the opposite sex. Nowadays, a "digital space" has become a unique environment where these specific crimes take place, and the border between the virtual and real world is practically indistinguishable. In this digital environment, pedophiles and other sexual predators have got a new space in which they establish spontaneous contacts with potential victims (often with children). In a manipulative way, they recruit vulnerable individuals with the aim of various forms of abuse and sexual exploitation. Considering the fact that it is a delicate and variable disorder, which calls for an interdisciplinary approach, profiling these persons is crucial in relation to any countermeasure. Profiling is also necessary to systematically investigate the symptoms, nature, and factors of psychopathological conditions and deviations in the existences of the affected persons. After all, it is one of the ways of reaction to make pedophilia more visible as a part of preventive programs before the late manifestation. In this paper, there are applied the methods of a quantitative and qualitative content analysis, comparative analysis (reaction to pedophilia) as well as a descriptive and analytical statistics. The purposeful goal is to recognize pedophilia as a sociopathological phenomenon that requires an adequate response from the social community.
Significance and economic functions of securities
Authors: Bulatović Petar
Published: January 2023

Globalization of markets and internationalization of trade significantly affect both the regional and national ways of doing business, economic trends, and economic balances, as well as the competitive positions on the world market of knowledge and capital. Securities have a great importance in business. Theory and practice agree that the issuance of securities represents a significant social and economic event, both locally and regionally, as well as globally. Bearing in mind the topic of the paper, in the subheadings there have been analyzed the basic issues related to securities-the concept and essential features of securities, the legal nature and types of securities, the creditworthiness of securities, the legal treatment of securities in Republic of Serbia, as well as the importance and economic function of securities.
State-legal foundation of medieval Serbia in the provisions of Dušan's Code
Authors: Joksić Ivan
Published: January 2023

This paper represents a synthesis of knowledge acquired by the author through studying Dušan's Code. It analyzes the provisions reflecting the state-forming ambitions of Emperor Dušan. Considering the fact that he was aware of the size and strength of his state, which was legally grounded, the Code had to meet the Emperor's expectations. The critics of his authoritarian rule cannot deny that he had purposefully limited his own (legal) power. Thereby, the legislative technique being used was fully in the spirit of the time and space in which the Code was to be applied. Therefore, it is the author's intention to point out the provisions of Dušan's Code in which the original sources of Serbian statehood could be traced back. The issue of originality of Dušan's Code will be discussed contextually regarding the content of certain regulations. This is hindered by the fact that Dušan's Code was transcribed over twenty times, and the contents of those transcriptions were not fully identical. Therefore, the originality of the provisions in Dušan's Code should also be evaluated in relation to its previous legal monuments.
Cyberbullying legislation: The role of cyberbullying law
Authors: Janković Aleksandra , Stošić Lazar
Published: January 2023

Faced with the increasing number of cases of cyberbullying and its consequences, states are trying to find the best way of its sanctioning. The latest tragic event, in which a young man from Republika Srpska committed suicide because he was mocked on one of the social networks, has triggered a public debate on whether cyberbullying is adequately sanctioned in our country. Based on the way individual countries sanction cyberbullying, we can divide them into two groups. The first group includes those countries that sanction cyberbullying through the application of one of the existing criminal offenses (insult, defamation, persecution, unauthorised filming, hate speech). The second one refers to those countries where cyberbullying has been treated as a special criminal offense. The aim of this paper is to make suggestions for possible changes, based on an analysis of the existing legislation on cyberbullying in our country as well as in some European countries, in order to protect the victims of cyberbullying more effectively. In the paper, the authors have used a normative-legal method for the analysis of legal regulations including a comparative method for a comparative presentation of a legal regulation of cyberbullying in other countries. On the grounds of the analysis conducted, there is a conclusion that a legal protection against digital violence in our country does not provide adequate remedies for the victims of cyberbullying.
The operator's liability for copyright violations committed by users of its platform
Authors: Lučić Sonja
Published: January 2023

The Court of Justice of the European Union has recently issued a judgment in the joined cases C-682/18 (YouTube) and C-683/18 (Cyando) relating to the operator's liability for copyright infringements committed by users of its platform within the meaning of Art. 3, paragraph 1 of Directive 2001/29 on the information society. In the cited cases of the Court of Luxembourg, there are two specific platforms being concerned: the popular video-sharing platform (YouTube) and the file hosting and sharing platform (Uploaded). The judgment was passed almost a year after the public defender's opinion had been published. In the meantime, exactly since June 7th 2021, a new liability regime for copyright infringement for certain internet platforms came into effect (Article 17 of Directive 2019/790 on copyright in the single digital market). Although the judgment was passed two weeks after Art. 17. Directive 2019/790 had entered into force, it was of great importance, especially considering the fact that on one hand, not all EU member states had implemented Art. 17 of Directive 2019/790, and on the other hand, the EU, through the Digital Services Act, was trying to modernize European regulations concerning the platforms regulation. In the paper, the author has, after referring to art. 17 of Directive 2019/790, analyzed the judgments in the combined cases of YouTube and Cyando, as well as the judgment of the Court of Justice of the EU regarding Poland's claim for annulment of Art. 17 of Directive 2019/790. The analysis of the judgment has shown that the regulations on copyright should establish a balance between the rights holders protection on one side, and exercising the basic rights such as freedom of speech on the other side.
Legal and instituional frameworks for the protection of voluntary pension funds in Republic of Serbia
Authors: Rajaković Jasmina , Rajaković Vesna
Published: January 2023

This paper represents a synthesis of both theoretical and practical research studies in the field of voluntary pension funds in Republic of Serbia. The authors have selected two significant segments in the scope of these funds contributing to their unobstructed functioning. These refer to the legal and institutional frameworks for the protection of pension funds. Our country is among the last to have introduced the possibility of voluntary pension insurance. This was done by passing an independent Law on Voluntary Pension Funds and Pension Plans. The National Bank of Serbia passed a large number of bylaws regulating their business conduct in our country in more detail. The legal protection frameworks for these funds span across the other branches of law (criminal law, misdemeanor law, and other). In this way, the normative domain of voluntary pension funds functioning has been rounded off. Institutional frameworks for the protection of voluntary pension funds are entrusted to the National Bank of Serbia, which supervises their functioning. This institution can also conduct the supervision over legal entities connected with the subject of the supervision by property, management or business relations, thus enabling a complete insight into their business conduct.
A comparative study of psychological burnout levels among teachers of physical education and sports in middle and secondary stages (Algeria-El Bayadh)
Authors: Mohammed Larbi , Mohamed Guezgouz , Djame Mokrani
Published: January 2023

The objective of the study is to determine the degree of extent of the phenomenon of psychological exhaustion among teachers of physical education and sports at the secondary and middle levels of education. For this study, the researchers relied on the descriptive approach for it fits the subject of the study. The sample consisted of (60) teachers, including (40) of the average level of education chosen at random. The researchers opted for the burnout scale introduced by Seidman and Zager 1994 and translated into Arabic by Adel Abdullah (1994). After statistical treatment, the results showed that teachers of physical education and sports are characterized by moderate degrees of psychological exhaustion. The study also revealed statistically significant differences in favor of middle school teachers.
How to increase sports activities of students at the University of Ljubljana after the analysis of the Bologna reform?
Authors: Jamnik Matej
Published: January 2023

The analysis of the Bologna reform showed that sports activities of students at the University of Ljubljana at the time of the introduction of the Bologna reform (2006-2011) fell from approx. 40% before the introduction of the Bologna reform to 12.9% after its introduction. The "alarming situation" has triggered a series of activities to improve it. Given the decentralized operation of the University of Ljubljana, sports teachers at each faculty of the University of Ljubljana found themselves in their own way - in general, unsystematic. The introduction of additional sports programs in recent years has resulted in an increase in the number of active students (to approx. 20%), but we believe that this is not satisfactory from several aspects - especially from the health point of view of the younger generation. The first step in this direction was made with the PROPOSAL on amendments (changes/additions) to the HIGHER EDUCATION ACT in the Republic of Slovenia of 23.01.2018 (additional funding for regular sports activities for all first-year students of all study programs in the amount of two teaching hours per week - which not evaluated by ECTS). Due to various reasons, no changes/additions have been made to date. During this time, however, the opinion was formed that the proposal would have difficulty "penetrating" through all the necessary procedures if all activities for inclusion in the mentioned sports activities in the NATIONAL HIGHER EDUCATION PROGRAM in the Republic of Slovenia (2021-2030) are not carried out. In 2021, this was realized with a series of activities.
Contribution of officers cadre to the Sokol movement and the Serbian Olympic Club from 1904 to 1941
Authors: Savić Zvezdan , Stojanović Nikola , Gavrilović Dejan , Savić Đorđe
Published: January 2023

This paper aimed to examine the officer cadre's contribution to the Serbian Sokol movement and the Serbian Olympic Club (SOC), highlighting certain social relationships and repercussions at the time. Many officers who graduated from the Military Academy performed the highest state duties in various fields and were present in sports and state sports institutions, which proves that the officers influenced not only the development and progress of the army in which they served but also improved the state and institutions in the whole. Using the historical method, we investigated the contribution of the officer cadre in the work of the Sokol movement and SOC and pointed to the fact that the Sokol movement and SOC shared common interests and goals within the army of the Kingdom of Serbia, the Kingdom of SHS and the Kingdom of Yugoslavia. Through theoretical and critical analysis, this paper examined these relationships and demonstrated the significant contribution of officers in developing the Sokol movement and the SOC.
Physical activity and physical exercise in a pandemic: Changes and consequences
Authors: Ranđelović Nebojša , Živković Danijela , Savić Zvezdan , Bjelaković Ljiljana
Published: January 2023

COVID-19 (coronavirus) was discovered at the end of 2019 and became a global pandemic in 2020. To fight the COVID-19 pandemic, numerous countries around the world have imposed different social restrictions in the hopes of slowing the virus's spread. For more than two years, humanity has been exposed to stress, which has resulted in a significant change in human lives and a negative impact on people's health due to the need for a completely different adjustment to everyday life. Every new, unfamiliar scenario triggers tension, which is a natural response to a threat. All of this resulted in people being confined to their houses, prevented them from seeing loved ones or taking care of daily tasks, decreased their mobility, forced them to work from home, and completely altered their daily routines. The SARS-CoV-2 coronavirus pandemic has created a global social threat, both economic and medical, with significant lifestyle changes. Part of the strategy to limit the spread of the virus was social isolation, which is incompatible with the human need for physical activity. The COVID-19 pandemic has stopped sport and its development in a significantly different way than any known pandemic so far. People whose main occupation is sports were especially affected. The fight against the spread of COVID19 has resulted in the closure of sports clubs, facilities, gyms, stadiums, swimming pools, dance and fitness studios, physical therapy centers, parks and playgrounds. A significant number of studies were conducted during the pandemic in order to determine the impact of the pandemic on various aspects of social life, precisely because of the situation that was imposed on the entire society and because of the change in the format of everyday life that deviated from the usual. Physical activity is one of them. This work aims to review those works by systematizing the goals, contents and results of those researches, in order to determine how much they were represented and what conclusions were reached based on them.
Processing of data collected by unmanned aerial photogrammetry systems
Authors: Stanojković Vujadin , Bakrač Saša , Đorđević Dejan , Radonjić Valentina
Published: January 2023

The paper describes the method of application of the platform for processing and managing spatial data collected by drones, as unmanned aerial photogrammetry systems. Software support for data processing and management, as well as model generation for photogrammetry purposes, is provided using the Agisoft Metashape software as an example. The data used for processing is related to the recording of the primary military standard for large lengths and angles, which is located in Kovin. The filming was carried out by a WingtraOne drone. The results of the work confirm the quality of the collected-recorded and processed-output data. The research confirmed the fact that the WingtraOne unmanned aerial photogrammetry system can be a good solution for collecting spatial data and creating some geotopographical materials for the needs of the Military Geographical Institute -"General Stevan Bošković".
Effects of the installation of FN power plants in the production facilities of the "Kreka" coal mine in Tuzla
Authors: Aličić Merim , Delić Izudin , Šabić Zakir , Aličić Almis
Published: January 2023

The use of renewable energy sources is imposed as an imperative for the competitiveness and stable energy policy of companies. The basic production equipment in the "Kreka" coal mine in Tuzla has electrical plants with a total peak load of 12 MW, and the costs for electrical energy exceed €3.5 million annually. The paper analyzes the suitability of infrastructure facilities and devastated areas of the Kreka Coal Mine in Tuzla for the construction of photovoltaic power plants and the effects of such plants. The results of the analysis show a significant resource for the installation of photovoltaic power plants with a capacity of 230 MW. The production of electricity from these photovoltaic power plants enables a reduction of emissions into the air by 190 t/year of particle emissions, by 316.2 •103 t/year of CO2 emissions, by 58.15 t/year of SO2 emissions and by 251.9 t/year of emissions NOx. With the subsidized purchase of electricity, it is possible to return the investment within 6 years.
Trends and perspectives of application of electric buses in the cities of Europe and worldwide
Authors: Mišanović Slobodan
Published: January 2023

The electric bus (E-bus) is a new concept of environmentally friendly and energy-efficient bus subsystem of public urban transport, which is increasingly present in many cities around the world. The introduction of this type of bus has a steady upward trend and is a major alternative to conventional buses. The paper gives a brief chronology of the most important events related to the application and introduction of electric buses around the world, the current state of the number of vehicles in operation, an overview of the electric bus market, and future directions of further development and implementation of this new concept in public transport, with a special emphasis on Europe.
The importance of digital transformation projects in agriculture and the challenges of their justification assessment
Authors: Petrović Dejan , Stanimirović Petar , Vratonjić-Gligorijević Aleksandar
Published: January 2023

Today's complex and dynamic environment poses numerous challenges to the economy and society, among which population growth, hunger and environmental pollution are very significant. One of the ways to overcome these problems is the digital transformation of society. Digital transformation projects in certain areas are not simple, and therefore it is necessary to draw conclusions about their realization with great care and adequate assessments. The digitalization of agriculture has significant effects that enable the success of farmers, but also of society, in terms of achieving economic, social and environmental sustainability. The basic specificity of agricultural production in relation to industries is that agricultural production largely depends on climatic conditions and the quality of the soil itself. One more specificity of agricultural production is that the time period from the start of investment to the achievement of the first results is much longer than in other industries. In addition, the total income is not evenly distributed over the months, but arrives once a year, or at very short intervals. Due to the great importance of digital transformation projects in agriculture and the specifics that arise in their investment evaluation, the aim of this paper is to show the most important effects of these projects, challenges in assessing their justification, as well as to present an example of good practice in the implementation of such a project in Serbia, Bosnia and Herzegovina and Montenegro.
Line heat detectors and their appliance in the case of auto parking garage
Authors: Jevtić Radoje , Janković Ivana
Published: January 2023

Fire presents almost everyday occurrence in people's life and work. The fight against fire must be fast and effective because consequences can be inconceivable, in the sense of human lives and material properties. Fire can occur everywhere: in the residential building, in factory, in hospital, in parking garage, in market, in school, anywhere where are people and their activities. Fire also can occur as natural disaster. One of ways how to fight against fire is to detect fire at early stage, as fast as possible. For that purpose, fire detectors are designed. This paper was written to show usage of line heat detectors in fire protection, their arrangement in objects related to different valid standards and computer simulation of line heat detectors in parking garages.
On guaranteed correction of error patterns with artificial neural networks
Authors: Brkić Srđan , Ivaniš Predrag , Vasić Bane
Published: January 2023

In this paper, we analyze applicability of single-and two-hidden-layer feed-forward artificial neural networks, SLFNs and TLFNs, respectively, in decoding linear block codes. Based on the provable capability of SLFNs and TLFNs to approximate discrete functions, we discuss sizes of the network capable to perform maximum likelihood decoding. Furthermore, we propose a decoding scheme, which use artificial neural networks (ANNs) to lower the error-floors of low-density parity-check (LDPC) codes. By learning a small number of error patterns, uncorrectable with typical decoders of LDPC codes, ANN can lower the error-floor by an order of magnitude, with only marginal average complexity incense.
Software optimization for fast encoding and decoding of Reed-Solomon codes
Authors: Skorokhod Sergey , Barlit Andrey
Published: January 2023

In this work, we propose a software library written in C for encoding and decoding Reed-Solomon codes. Library consists of one scalar CODEC and two vectorized codecs for x86 architecture. Vectorized codecs use the benefits of SSSE3 or AVX2 instruction sets. We compare the performance of our three codecs with the JPWL RS CODEC from the Open JPEG library. The performance comparison methodology is described, and it is based on the measuring of the encoding and decoding speed. The results demonstrate a 4.1x speed gain with the scalar CODEC and a 19.6x gain with the vectorized CODEC. Based on testing results and supported instruction sets, a dynamic selection of CODEC version is proposed.
A comparative study of deep learning and decision tree based ensemble learning algorithms for network traffic identification
Authors: Nikolić Nedeljko , Tomović Slavica , Radusinović Igor
Published: January 2023

In this paper, we apply Deep Learning (DL) and decision-tree-based ensemble learning algorithms to classify network traffic by application. Various Deep Learning (DL) models for network traffic identification have been presented, implemented and compared, including 1D convolutional, stacked autoencoder, multi-layer perceptron, and combination of the aforementioned. Then the results of DL models have been compared to those obtained with two popular ensemble learning models based on decision trees-Random Forest and XGBoost. To train and test the classification models, a dataset containing both encrypted and unencrypted traffic has been collected in a real network, under normal operating conditions, and pre-processed in a way that ensures non-biased results. The classification uncertainties of the models have been also quantified on publicly available ISCX VPN-nonVPN dataset. The models have been compared in terms of precision, recall, F1 score and accuracy, for different levels of complexity and training dataset sizes. The evaluation results indicate that the decision-tree ensemble learning algorithms provide more accurate results and outperform the DL algorithms. The performance gap reduces with the dataset complexity.
System for 3D mapping using affordable LIDAR
Authors: Krsmanović Veličko , Barjaktarović Marko , Gavrovska Ana
Published: January 2023

In this paper a new system for 3D (three-dimensional) mapping using affordable LIDAR (light detection and ranging) is presented. The implementation of LIDAR technology-based approach enables obtaining a point cloud as a representation of indoor surrounding. In recent years with the help of LIDAR this kind of sensing has found numerous applications across various industries. Here, a cloud of points is generated during room scanning using Arduino platform based rotating system. The obtained results are promising, and the proposed solution can find its practical application in different fields. Moreover, it can provide many possibilities for future experiments with surrounding mappings, image matching, autonomous driving, obstacle observation, collision avoidance, material type detection such as transparent ones.
Comparison of machine learning approaches to emotion recognition based on deap database physiological signals
Authors: Stajić Tamara , Jovanović Jelena , Jovanović Nebojša , Janković Milica
Published: January 2023

Recognizing and accurately classifying human emotion is a complex and challenging task. Recently, great attention has been paid to the emotion recognition methods using three different approaches: based on non-physiological signals (like speech and facial expression), based on physiological signals, or based on hybrid approaches. Non-physiological signals are easily controlled by the individual, so these approaches have downsides in real world applications. In this paper, an approach based on physiological signals which cannot be willingly influenced (electroencephalogram, heartrate, respiration, galvanic skin response, electromyography, body temperature) is presented. A publicly available DEAP database was used for the binary classification (high vs low for various threshold values) considering four frequently used emotional parameters (arousal, valence, liking and dominance). We have extracted 1490 features from the dataset, analyzed their predictive value for each emotion parameter and compared three different classification approaches - Support Vector Machine, Boosting algorithms and Artificial Neural Networks.
Simulation environment for scalability and performance analysis in hierarchically organized IoT systems
Authors: Turkmanović Haris , Popović Ivan , Čiča Zoran , Drajić Dejan
Published: January 2023

The accelerated development of technologies, especially in the field of telecommunications, ease the integration of embedded devices within various IoT applications. Modern IoT applications assume heterogenous embedded platforms capable of collecting, processing, and exchanging data between the tiers of the IoT system architecture. Designing a multi-tier IoT system, even in the case of architecture that involves a small number of intelligent embedded devices, can be a very demanding process, especially when dealing with the strict requirements of IoT application concerning application performance, scalability, and energy consumption. In this paper, an open-source simulation framework for the performance analysis of an arbitrary multi-tiered IoT system is presented. Framework supports insight into the data availability within the tiers of IoT system enabling designers to evaluate the performance of IoT application and to engineer the system operation and deployment. Besides the performance analysis, proposed framework enables the analysis of energy consumption, architecture scalability utilizing different communication patterns and technologies. The case study of a large-scale IoT application for demonstrating the framework potential regarding the scalability and data availability analysis is also given.
Development of motor hull insurance in Serbia 2000-2020
Authors: Cerović Milan
Published: January 2023

The beginning of the 21st century was marked as the era of automobiles. The slogan "An automobile is a luxury" has been replaced by a new one, "An automobile is not a luxury, but a necessary means of transport". After 100 years, an automobile went from being a luxury item to an optimal means of transport. Today, it is hard to imagine life without automobiles. A motor vehicle enables easier and faster reaching any point in a city, a country, a continent and even another continent. Transport by an automobile, as one type of land transport, is the most widespread and takes a leading position in transport of passengers, goods and various types of cargo over different distances. In addition to the convenience, an automobile is also a cause of various types of accidents. Due to its nature and method of use, it can cause damage both to itself and to another automobile, a driver, a passenger, a pedestrian, but also to a third person and/or his/her property. Due to such losses, it is convenient and important to offer several insurance lines, among which motor hull insurance is one of the most common insurance lines. The aim of the paper is to show a long-term development of motor hull insurance and determine its place, role and significance in non-life insurance market in our country. The analysis includes the most important insurance categories, starting with market participants and insurance acquisition, through claims and technical reserves, to ratios. The focus is on a more detailed digital presentation of those insurance categories because numbers, in any case, reflect the issues that are the subject of this paper more precisely and more objectively than any text, with a greater possibility for a reader to make his/her own analyses and conclusions. In addition to motor hull insurance analysis, the average annual share of acquisition, claims and technical reserves of five largest non-life insurance lines will also be presented.
Aktualiserede kompetencer i projekt digitale læringscirkler
Authors: Rasmussen Hanne Fie , Kjærgaard Thomas , Jørgensen Christian Black
Published: January 2023

I denne artikel præsenteres et studie af den sociale praksis, der er etableret i forbindelse med et forløb om udvikling af digitale undervisningskompetencer. Forløbet var en del af projektet ”Digitale læringscirkler”. Med afsæt i empiri fra projektet undersøges det i denne artikel, hvilke kompetencer undervisere fra tre videregående uddannelsesinstitutioner oplever at have udviklet i forbindelse med deres deltagelse i forløbet. I et mixed methods studie, der inddrager både kvantitative data fra en surveyundersøgelse (n=96) og kvalitative data fra interviews med fire deltagere, undersøges de nye hhv. didaktiske og digitale muligheder for udvikling af undervisning som underviserne oplever, at forløbet har åbnet op for. Artiklen bidrager med viden om de didaktiske og digitale kompetencer underviserne har oplevet at udvikle i forbindelse med forløbet. Den viser, at selvom et udviklingsforløb har stort fokus på digitale aspekter, så fylder det almendidaktiske meget hos deltagerne.
Divisa y medallas de Manuel Filiberto de Saboya (1528-1580). Un duque en perpetua guerra / Emblem and Medallions of Emmanuel Philibert of Savoy (1528-1580). A Duke at Perpetual War
Authors: Goicoechea Beltran Aitana
Published: January 2023

ABSTRACT: The Duke Emmanuel Philibert of Savoy (1528-1580) was a key figure in bringing the Italian wars to an end and also in arranging the signing of the Treaty of Cateau-Cambrésis. His duchy, occupied by France beginning in 1536, was given back to him in 1559 with the exception of various strongholds that remained in French and Spanish hands until several years after the treaty. During that period, important examples of artistic creation commemorating the peace treaty and also the autonomy of the duchy were produced in Savoy. This article explores the interesting configuration of this iconography that underlined the need of self defense during an uncertain peace.
KEYWORDSDuke of Savoy; Iconography; Emmanuel Philibert; Machiavelli; St. Augustine of Hippo
RESUMEN: El duque Manuel Filiberto de Saboya (1528-1580) fue una pieza clave para el fin de las guerras de Italia y la firma del Tratado de Cateau-Cambrésis. Su ducado, ocupado por Francia desde 1536, le fue devuelto en 1559 con la excepción de varias plazas que se mantuvieron en manos francesas y españolas hasta varios años después. Durante este tiempo, en Saboya se produjeron importantes ejemplos de creación artística conmemorando el tratado de paz y la autonomía del ducado. En este artículo se explora la interesante configuración de esta iconografía que subraya la necesidad de autodefensa durante una paz incierta.
El «romance mudo» a la Virgen de la Esperanza de San Lucas: un jeroglífico religioso en el Toledo de finales del siglo XVII / The «mute romance» to the Virgin of Hope (Virgen de la Esperanza) of San Lucas: a Religious Hieroglyphic in Toledo during the late seventeenth Century
Authors: De Mingo Lorente Adolfo
Published: January 2023

ABSTRACT: The church of San Lucas de Toledo preserves a «mute poem» dedicated to the Virgin of Hope (Virgen de la Esperanza). Unlike other similar hieroglyphs, usually disseminated in printed form during Spanish Golden Age festivities, this one is painted and framed as a permanent artifact. The solution or «reading key» to its meaning has not been preserved, although it is possible to interpret it by means of indirect sources. Finally, I offer the most complete profile to date of the author of the hieroglyph, the priest Matías Fernández de Consuegra (1653-1711), a cathedral cantor and writer whose prose is characterized by a marked Baroque style who remained active in Toledo during the late seventeenth century and on into the and early eighteenth century.
KEYWORDSVisual Poetry; Baroque Hieroglyphs; Mute Poem; Toledo; Seventeenth Century
RESUMEN: La iglesia de San Lucas de Toledo alberga entre sus bienes artísticos un «romance mudo» dedicado a la Virgen de la Esperanza. A diferencia de otros jeroglíficos similares, habitualmente difundidos a través de estampas durante las festividades del Siglo de Oro, este se encuentra pintado y enmarcado con carácter permanente. No se ha conservado su correspondiente solución o «llave de lectura», aunque es posible interpretar su significado a través de fuentes indirectas. Ofrecemos, para finalizar, la semblanza más completa hasta la fecha del autor del jeroglífico, el sacerdote Matías Fernández de Consuegra (1653-1711), cantor catedralicio y escritor de ampuloso estilo barroco que permaneció activo en el Toledo de finales del siglo XVII y comienzos del XVIII.