bluuebunny/crossref_metadata_2025 huggingface dataset:
The application of llizarov technique in the treatment of comminuted distal tibia fractures
Authors: Lalić Ivica , Harhaji Vladimir , Dulić Oliver , Bjelobrk Mile , Janjić Nataša , Lalić Nensi , Bojović Marko , Mladenović Marko
Published: November 2023

Introduction. High-energy distal tibia fractures are characterized by great comminution and extensive lesions of the surrounding soft tissues. The risk of developing complications during treatment is high. The application of the Ilizarov's technique reduces the risk of complications significantly, and provides good final treatment results. Methods. In our prospective observational study 41 patients were included. Clinical characteristics were evaluated by Gustillo-Anderson, Checketts-Otterburns and AO/OTA classification. The ASAMI protocol was used to assess bone union. Functional treatment results were represented using the modified Karlström-Ollerud scoring system. Analysis and monitoring time (follow up) was 18 months. Results. Using radiographic and clinical parameters, we recorded complete healing in all fractures. In the group of 43B intra-articular fractures, circular fixator was removed after 16 weeks (range 13 -31), while in the 43C fracture type group, it was removed after 18 weeks (range 13 -29). The ASAMI evaluation of bone healing showed 31 (75%) excellent, 76 (15%) good, 3 (8%) satisfactory, and 1 (2%) poor result. Functional recovery results obtained after 6 months showed the mean value of 24.7 using the modified Karlström-Ollerud scoring system in three follow-up periods, which represents recovery. The results present 12 months after surgery showed the mean value of 27.6, representing satisfactory recovery, while during the last parameter measurement performed after 18 months, the value was 29.5, which indicates good functional recovery. Conclusion. Transosseous osteosynthesis Ilizarov treatment applied in closed and open comminuted distal tibia fractures showed good final bone and functional results with minimal complications, and contributed to better patient's quality of life.
The first report of the teleomorph stage of the septoria nodorum blotch, Leptosphaeria nodorum, in Serbia
Authors: Jevtić Radivoje , Župunski Vesna
Published: November 2023

Parastagonospora nodorum (teleomorph Leptosphaeria nodorum) is the causal agent of septoria nodorum blotch (SNB). It was first discovered on wheat in 1845. and is common in regions with relatively high or periodically high rainfall. P. nodorum causes symptoms on all above-ground parts of the plant, including leaves, stems, glumes, and awns. The pathogen overwinters on wheat crop residues in the form of pseudothecia and pycnidia. Ascospores released from pseudothecia typically serve as the primary source of inoculum, but conidia released from pycnidia on crop residues can also infect seedlings. Additionally, the fungus is known to survive on seeds in the form of dormant mycelium, making infected seeds a potential source of primary infection. During the 2022/2023 growing season, precipitation totals in April (63.9 mm) and May (124.8 mm) exceeded seventeen-year averages, creating conditions conducive to occurence of SNB. Microscopic examination of lesions on leaves of wheat variety revealed the presence of the sexual stage (L. nodorum) for the first time in Serbia. The asexual stage (P. nodorum) was observed on infected ears of different varieties. This study highlights the need for more attention in monitoring conditions that could lead to outbreak SNB in wheat production areas in Serbia.
Causal agent of wheat blast (Magnaporthe oryzae): Occurrence and risks for wheat production in Serbia
Authors: Jevtić Radivoje , Župunski Vesna
Published: November 2023

Magnaporthe oryzae (anamorph Pyricularia oryzae) is the causal agent of wheat blast. Apart from being a pathogen of commercially significant plant species, it also infects weeds. Within the species M. oryzae, several pathotypes exist, with the pathotype Magnaporthe oryzae Triticum (MoT) infecting wheat and several other grass species. M. oryzae was first discovered in Brazil in 1985 and has since posed a threat to wheat production in various parts of the world, including Bangladesh and European Union countries. The MoT pathogen can infect all above-ground parts of the plant, but the most common symptoms appear on the ears and closely resemble symptoms of fusarium head blight. During the 2022/2023 growing season, precipitation levels in April and May at the Rimski šančevi exceeded seventeen-year averages, while the temperature in May was within the multi-year average range. These conditions created a favorable environment for the emergence of M. oryzae. Microscopic examination of infected ears revealed the presence of conidia from the asexual generation of Pyricularia oryzae. Considering that MoT is not classified as a quarantine pathogen in many EU countries, this study highlights the risk of the presence of M. oryzae in Serbia, as well as the importance of monitoring the occurrence of M. oryzae in weeds, grasses, and cereal grains to take timely action in protecting crops from this pathogen.
Zearalenone producing fungi from the genus Fusarium
Authors: Konstantin Đina , Jajić Igor , Iličić Renata , Bagi Ferenc
Published: November 2023

Mycotoxins are secondary chemical metabolites of different fungi. The most important mycotoxigenic fungi are from the genera: Aspergillus, Penicilli-um, Fusarium, Claviceps and Alternaria. Fusarium fungi are the most wide-spread in cereal-growing areas of the planet. Fumonisins, trichothecenes and zearalenone are the most commonly occurring Fusarium mycotoxins in cereal grains and animal feed. The occurrence of toxic metabolites in food, as well as in feed, represents a serious global problem for human health due to their toxic effects. Zearalenone is mainly produced by Fusarium graminearum and F. culmorum. Corn is the most frequently contaminated plant due to its distribution throughout the world. Contaminated products can lead to huge economic losses and pose risks to animals and humans. It affects animal health and mainly has estrogenic effects on various organisms. Swine are the most commonly affected domestic animals, but cattle and poultry may also be affected.
The influence of different types of perennial mulch on the weed seed bank in an orchard
Authors: Popov Milena , Konstantinović Bojan , Milić Biserka , Samardžić Nataša , Barać Gordana , Stojanović Tijana
Published: November 2023

Mulching is an agrotechnical measure often used in orchards and it means covering the soil with the organic or inorganic material in order to prevent the germination of the weeds. The other positive effects imply: the improvement of the physical and chemical soil characteristics, decrease of soil erosion and water loss, the prevention of the soil crusting, etc. The research of the weed seed bank under the different types of mulch was conducted during the growing season of 2021. in a plum orchard located at Rimski Šančevi. The black and white agrotextile and white mulch film, unlike the other mulches, left the surfaces clean, without the weeds. The analysis of the weed seed bank revealed the seeds of 20 weed species, of which 12 were not found to be present in the orchard during the experimental year. The overall germination rate of the obtained weed seeds is low because in the three-year experiment with mulches, there was no influx of new weed seeds for several years, while the old ones lost their germination. The highest germination percentage was noted for the seeds of the following species: Amaranthus retroflexus, Stellaria media and Solanum nigrum, due to their ability to retain germination for a long period of time. The highest number of the seeds per m2 was found in the inter-row space due to the large influx of the seeds during the growing season. The highest germination rate was observed in case of the seeds found under the sawdust mulch. None of the ungerminated seeds showed the viability, as determined by the Crush test.
Research into farmers' view towards personal protective equipment when working with plant protection products
Authors: Gavanski Dušan , Petrović Vesna
Published: November 2023

The harmful consequences of the use of plant protection products (PPP) on humans, flora and fauna, and the environment have led to the need to control it through a series of conventions and programs that prohibit the use of some of the agents, while others only limit their use. PPP pose a special danger to people who frequently apply them and who are in direct contact with them during application. For this reason, methods of protection are prescribed, which practically boil down to the mandatory use of personal protective equipment as well asinstructinos on the safe handling of PPP. However, the implementation of protection measures is difficult to implement everywhere in the world. The paper presents the views and opinions of 101 farmers about the dangers of PPP and the way they use personal protective equipment when working with them. The data was obtained through an anonymous survey, and the survey was closed type and contained 15 questions.
Evaluation of profit and critical values in spinach production in the Republic of Serbia
Authors: Subić Jonel , Kljajić Nataša , Grujić-Vučkovski Biljana
Published: November 2023

The subject of this research paper is the evaluation of spinach's (Spinacia oleracea L.) production profitability, given that spinach is an important vegetable species for human nutrition and health. The research started with an overview of spinach production worldwide and in the European Union in the past ten years (2012-2021). The Statistical Office of the Republic of Serbia (SORS) does not monitor the production and yield of spinach as a separate vegetable species, so comparison between Serbia and other world countries is not possible. Therefore, the paper analyzes the values of spinach exports and imports in Serbia. In the end, the evaluation of profit and critical values is given on the example of open field spinach production by an agricultural producer in the area of AP Vojvodina, in the South Banat district. The analysis of achieved profit was made based on the calculation of spinach production for one production cycle (autumn sowing 2021/harvest 2022) on an area of 1ha. The achieved results show that the production of spinach in this district is profitable, and the financial result is positive.
Implications for employment in the period of two crises: Comparative study of the Balkans and the EU
Authors: Šobić Ljiljana , Pantović Danijela , Miletić Radovan
Published: November 2023

One of the main problems the world is currently dealing with is unemployment. The characteristics of the labor market in the Republic of Serbia are long-term high unemployment rate, unfavorable qualification structure, high youth unemployment rate, regionally unequally distributed unemployment, and insufficient measures of active state employment policy. These characteristics point to complex issues that can be characterized as a type of labor market disparity. The problem is that the existing labor supply is finding it increasingly difficult to adapt to the changing demand for labor, which is associated with growing competition in the global market and accelerated technological change. The fact that Serbia's unemployment rates are higher than those of the EU's member states is particularly significant given that the Republic of Serbia's employment policy's primary objectives are the establishment of an effective, stable, and sustainable employment growth trend and the harmonization of employment policy and labor market institutions with the EU acquis. Insufficient use of human resources of a country has a direct impact on its economy and national income, which directly has negative repercussions on the living standards of the population and increasing poverty.
Data Warehouse and its tools
Authors: Mrđa Bojan , Soleša Dragan
Published: November 2023

As the battle for every and even the smallest piece of the pile on the market is great, a growing number of companies are finding solutions to improve their business as much as possible. One of the solutions is Data Warehouse and OLAP, that is, their tools, which gives managers or users the ability to access, with minimal effort, the very important data that is important to them for the business. This paper presents data analysis on concrete examples of the Belgrade Academy, where the mentioned tools were used with the aim of improving the quality of teaching.
Analysis of services sector of the Republic of Serbia during COVID-19 pandemic
Authors: Đurković-Marić Tijana , Vukmirović Goran , Marić Radenko
Published: November 2023

The aim of this paper is to analyze the situation in the services sector after the global pandemic caused by the virus corona, as well as an overview of the disruptions caused by the pandemic in the global and national market. The service sector suffered the greatest consequences of the pandemic and the initial lockdown. All services, except trade and retail, have discontinued their business activities. The research will cover comparisons of the situation in the services sector in the period before, during and after the global pandemic. Based on the results from the global market and the situation in the services sector of certain countries in the recovery period, a forecast of the situation in the domestic market will be made. The research will focus specifically on tourism, hospitality and retail as the sectors which were the most affected by the pandemic in the Republic of Serbia market, accounting for almost 20% of national GDP. The results of the survey will indicate to the relevant institutions, economic policy makers and management of the service companies what measures must be taken to return the level of income and profitability to the period before the pandemic. Suggestions and guidelines for future research are outlined in the paper.
Investing in "Sondervermögen" funds in Germany: An analysis of legal structure, regulatory requirements and performance
Authors: Cicmil Danica
Published: November 2023

This paper provides an analysis of "Sondervermögen fonds", or special investment funds, in Germany. These funds are structured as separate accounts, providing additional protection for investors, as their assets are legally separate from the assets of the fund manager. The Federal Financial Supervisory Authority (BaFin) regulates "Sondervermögen fonds", ensuring that they are managed responsibly and in compliance with the German Investment Code (Kapitalanlagegesetzbuch or KAGB). The KAGB sets out the legal framework for the operation of "Sondervermögen fonds" and covers various aspects, including authorization, investment restrictions, custody and administration of assets, supervision, and regulatory measures. The paper describes the legal structure, regulatory requirements, and performance of "Sondervermögen fonds", highlighting their advantages over other investment vehicles. "Sondervermögen fonds" have become a significant tool for investors in Germany and are expected to continue playing a crucial role in the country's investment landscape.
Method to build a generalized table of parameters in engineering design of technical systems: Lattice structure as a case study
Authors: Abdellatif Mohamed , Chibane Hicham , Dubois Sébastien , de Guio , Roland Thierry
Published: November 2023

Design parameters are a crucial element of the product design process. However, design parameter models are often used to solve specific design problems. Generalizing design parameters is an approach to tackle more design problems. This study contributes to resolving certain limitations associated with modeling and representing the design parameters. This paper presents a generalized table of parameters (GTP) for modeling system parameters. This table is linked to a contextual database based on data and information collected from scientific databases, experts' interviews, and Computer-Aided Design (CAD) and Finite Element Modeling (FEM) software analysis and usage. The proposed representative table shows the robustness of integrating multiple sources of information to present a holistic and generalized view of the design system. The quality of the provided data in the table is assessed by applying certain evaluating dimensions and indicators. A case study will be presented on the lattice structure within a specific context in the mechanical field.
Experimental and CFD analysis of a gas-lubricated foil thrust bearing for various foil configurations
Authors: Ravikumar R.N. , Rathanraj K.J. , Arun Kumar , Supreeth S.
Published: November 2023

Thrust foil bearings operating at hydrodynamic conditions are self-acting (aerodynamic) bearings that support high-speed shafts at mild loading conditions with air as a lubricant and are generally used in low-power gas turbines. This paper presents an experimental study and a detailed computational analysis of dynamic characteristics of the foil thrust bearing (FTB) in terms of load-carrying capabilities as a function of thrust runner speed and gap between the bearing assembly and the runner by considering the effect of bearing parameters such as number of foils, shape of the foils, and assembly of foils on the bearing pad. The parametric study was conducted on a newly conceptualized bearing test rig capable of rotating up to 45,000 rpm speeds that measured the axial loads of the air foil thrust bearings (AFTB). The computational model of the foil thrust bearings for various configurations with top foils is simulated using multiphysics software for foil deflections and pressure distributions on the foil surface. The numerical results were compared with the experimental values, while the air foil thrust bearings with multilayered foils called cascaded foils (patented) had higher load capability in comparison to other conventional bearing models.
Performance analysis of elliptical journal bearing lubricated with experimentally characterized nanolubricant considering thermal effect using CFD technique
Authors: Abass Basim , Saba Ahmed , Yaser Mohamed
Published: November 2023

This study uses computational fluid dynamics (CFD) to quantitatively examine the performance of an elliptical journal bearing (EJB) lubricated with TiO2 and ZnO nano-lubricant considering thermal effect. In an experiment, nanoparticles with particle concentrations varying from 0 to 2 weight percent are mixed with SAE15W40 engine oil to create these lubricants. The impact of weight fractions, rotational speed, eccentricity, and ellipticity ratios on the thermal performance of the EJB has been examined. The Kreger-Dougherty model is employed to understand the effects of oil film temperature as well as nanoparticle concentration on lubricant viscosity. The pressure and temperature determined by (Dang 2020) and (Wang 2021were evaluated against the CFD model with good agreement. The findings show that for 2 wt% nanoparticles, e of 0.6 and N of 5000 rpm, the load-carrying capacity increased by 5.5% and 4% and the side leakage flow decreased by 24.4% and 18%.
GARM: A stochastic evolution based genetic algorithm with rewarding mechanism for wind farm layout optimization
Authors: Mohandes Mohamed , Khan Salman , Rehman Shafiqur , Al-Shaikhi Ali , Liu Bo , Iqbal Kashif
Published: November 2023

Wind energy has emerged as a potential alternative to traditional energy sources for economical and clean power generation. One important aspect of wind energy generation is the layout design of the wind farm so as to harness maximum energy. Due to its inherent computational complexity, the wind farm layout design problem has traditionally been solved using nature-inspired algorithms. An important issue in nature-inspired algorithms is the termination condition, which governs the execution time of the algorithm. To optimize the execution time, appropriate termination conditions should be employed. This study proposes the concept of a rewarding mechanism to achieve optimization in termination conditions while maintaining the solution quality. The proposed rewarding mechanism, adopted from the stochastic evolution algorithm, is incorporated into a genetic algorithm. The proposed genetic algorithm with the rewarding mechanism (GARM) is empirically tested using real data from a potential wind farm site with different rewarding iterations.
Numerical investigation on effect of spark plug configuration on performance in an engine cylinder
Authors: Bakhshi Mehul , Pritanshu Ranjan , Shukla Anuj
Published: November 2023

A numerical investigation of combustion inside single and twin-spark engines was performed to study the effect of a spark plug, positions and spark timings on engine performance. Improvement in engine performance is one of the automotive industry's primary research areas. Consequently, the study's results can be utilised to optimise engine configurations to achieve maximum performance. The investigation was conducted using a finite volume-based open-source software, OpenFOAM, for computational simulations. Simulations were conducted using the XiEngineFOAM solver with a transport equation for modelling flame fronts. The Standard k-e turbulence model was used to predict turbulence parameters. The simulation was conducted for compression and power stroke (crank angle between - 180° and 180°), assuming an even distribution of the air-fuel mixture within the pentroof 4-valve engine cylinder. Simulations were conducted for four cases, including variations in the position and timing of spark plugs in single-spark and twin-spark engines. According to the results of the simulations, the single-spark engine provides the best performance when the spark plug is ignited early and positioned at the cylinder's centre. When placed at an optimal position determined by flame travel and collision, the twin-spark engine gives the best performance at the highest difference between the spark timings of the two spark plugs.
Analysis of the performance and kinematics of the movement of UAV
Authors: Miloš Marina , Mirosavljević Petar
Published: November 2023

The use of drones today has become an integral part of modern life to the extent that the level of drone utilization determines the quality of life. The expansion of drone applications has grown exponentially. This growth is primarily due to their low acquisition and maintenance costs, as well as their versatility. First of all, their expansion is contributed by the low costs of both acquisition and maintenance, as well as the possibility of various applications. The paper aims to present drones and their advantages compared to traditional aircraft as a means of transportation. The paper includes an analysis of unmanned aircraft performance, an examination of the kinematics of unmanned aircraft movement, a discussion of the most common structure used in unmanned aircraft (the quadcopter), and a comprehensive assessment of the risks associated with unmanned aircraft and their potential integration into civil air traffic. The quadcopter structure, as the dominant solution for the production of unmanned aircraft, is discussed in detail. At the very end, an overall analysis of the risks posed by unmanned aircraft and, as such, whether they can be integrated into civil air traffic is given.
Entrepreneurship in Society 5.0: Integrating technology and humanistic values for a sustainable future
Authors: Đorđević Luka , Ćoćkalo Dragan , Bakator Mihalj , Novaković Borivoj
Published: November 2023

Industry 4.0 brings digitization and automation, increasing efficiency, but causing job loss. Industry 5.0 integrates people and machines to overcome these limitations. Entrepreneurship in Society 4.0 is shaped by digital technologies, while Entrepreneurship in Society 5.0 emphasizes the balance of technology and humanistic values. The adoption of Industry and Society 5.0 is growing, requiring further development of infrastructure and education. The focus of this paper is the analysis of the concept of entrepreneurship 5.0 in society 5.0 and the development of a theoretical model for the improvement of entrepreneurship.
Exploring role of Eco-friendly elevators in literature
Authors: Zrnić Nenad , Dragović Andro , Kosanić Nenad
Published: November 2023

This study is exploring the role of Eco-friendly elevators in literature based on an analysis of 113 papers published in scholarly journals drawn from the Scopus database. This is the first study which used a bibliometric analysis to review the academic literature in the elevator system research field. The analysis started with the gradual classification of collected papers according to the multi-objective problem of vertical transportation and a citation analysis. Determining predominant themes and sub-themes was conducted by bibliometric analysis based on the co-occurrence of title words inside bi-dimensional matrix. The obtained results highlighted an emerging research cluster (energy utilization) one of the most important for future elevator system development. This cluster addresses technological advances of elevators and predicts Eco-elevator technologies to be widely used in near future. This research could be very useful to foster in-depth knowledge of Eco-friendly elevators.
Regional economic losses from excluding Roma women from labour market in Serbia
Authors: Tanasković Svetozar , Jandrić Maja , Molnar Dejan
Published: November 2023

In this paper, we calculate the economic costs of labour market exclusion of Roma women at the NUTS 2 level in Serbia in terms of output and fiscal benefits. The approach relies on the analysis of a scenario in which there are no differences in the level of wages or in labour force participation and employment rates between Roma and non-Roma labour market participants. We use Labour Force Survey (LFS) data from 2019 as a basis for the comparison of the Roma and non-Roma in terms of expected gross earnings for working-age individuals provided they are employed. The results show that the total economic loss (output + fiscal) due to the exclusion of Roma women from the labour market in Serbia amounts to about 197.7 million euros on an annual basis. Of that, 70.5% (139.3 million euros) come from output/productivity losses, and 29.5% (58.4 million euros) from fiscal losses. The largest contribution to total economic losses comes from the South and Eastern Serbia region (37.25%), followed by the Vojvodina region (28.25%), the Belgrade region (24.03%) and the Šumadija and Western Serbia region (10.46%).
Theoretical Sufism: Periodization of the history of the discipline
Authors: Halilović Seid
Published: November 2023

Theoretical Sufism is an ontology formulated by prominent Muslim mystics. They are primarily known for their intuitive experiences in the highest realms of total existence. In the light of the final intuitions, these mystics got the opportunity to present a new system of ontology, that is, mystical knowledge about the problem of being in general. The answer to the questions about what reality is and how it really exists they provided through their spiritual experiences when they directly, with the eye of the heart, saw the most hidden secrets of existence and on that basis they built a system of knowledge about all lower levels of the universe. Muslims had intuitive knowledge with ontological content ever since the earliest period of the emergence of Islam. However, the results of their mystical effort, when ontological and metaphysical questions are involved, were not united in a separate study discipline. The discipline, which would be called theoretical Sufism, was officially established in the 13th century by the famous Ibn ʻArabī, and his students and influential representatives of his school will continuously improve and strengthen the structural order of the new ontological discipline in the cognitive tradition of Islam. At the beginning of the 17th century, Mullā Ṣadrā Shīrāzī made one of the biggest turning points in the history of Muslim thought when, in his new philosophical school, which he called transcendent philosophy, he proved the truth of the ontological principles of theoretical Sufism with grounded philosophical demonstrations. Mullā Ṣadrā himself explained that by uniting Islamic philosophy and theoretical Sufism, he actually completed the mission of philosophy and metaphysics in general.
Serbian Sokol movement, a phenomenon throughout three centuries: Anniversaries of the Sokol 2022
Authors: Vukašinović Vladan , Kocić-Pajić Sonja , Erak Marko , Marović Božidar
Published: November 2023

The history of the Sokol movement in Serbia is significant, interesting, and full of numerous events that are worth remembering and celebrating anniversaries. On the occasion of the thirtieth anniversary of the restoration of the Sokol movement in Serbia (1992-2022), the Sokol Association of Serbia organised the symposium "The Sokol movement of Serbia in three centuries and the Sokol anniversaries in 2022." It was held on 29 October 2022 in the Municipal Centre for Physical Culture of Belgrade - the former Sokol House "Matica", and since 1934 under the name "King Aleksandar I Karadjordjević". In the introductory lecture, I presented aspects of the origin and development of the Sokol training system in Serbia, based on ten significant anniversaries from the chronological factography of the Sokol movement, the contributions of its founders, as well as the characteristics of today's modern Sokol movement. The discussions of the participants of the meeting through the prism of perception of the importance of this training system, in the light of modern life and current events, will justify the attribute of the Sokol movement as a kind of phenomenon of the Sokol movement.
The first Slovene Gymnastic Associations (1862-1867)
Authors: Dorigo Silvio
Published: November 2023

The first Slovene gymnastic associations were linked to the development of the national identity among Slavic peoples, to the freedom of gathering granted in the Austrian Empire and to the German gymnastic associations. They above all contributed to forming and strengthening the Slovene national consciousness through gymnastics, but more broadly through activities related to the new idea of free time among the bourgeoisie and to the associational and national political context. But they also demonstrated the fragility of the Slovene national consciousness. Despite the choice to take inspiration from the Slavic Gymnastic Association Sokol from Prague, a predominant role was still played by German language, culture and gymnastic associations. At the same time, the most relevant among these Slovene associations (the Ljubljana Sokol) sought to contribute to the development of Slavic solidarity, at first seeking a contact to the Sokol in Prague, then with the major Croatian Sokol. Such Sokol associations were also the first ones to spread gymnastics and hiking among Slovenes, albeit at an embryonic level. They spread much less than among the Czechs and only in the province of Carniola, because of the smallness of the Slovenian bourgeoisie and upper class, but also because of the political interests of their inspirers, protectors and presidents. These interests, together with the differences in political strategies, led to an end in the contact between the Sokol of Ljubljana and the one in Prague.
Open data in sport activities
Authors: Milić Petar
Published: November 2023

Open data is a new concept in the development of e-government. It stands for a public sector information which is available for distribution and usage without any restrictions. In this paper we address the existing initiatives regarding publication of data related to the sport and physical education and present the analysis of the current state in this area. Moreover, we present the ways how open government data can be exploited in light of improvement of physical education and health with usage of modern information technology tools. We will show how providing access to any information on sport activities, especially through open government data, will continue to empower citizens and every stakeholders with modern applications in this area. Furthermore, we reveal the potential of open data for this purpose, emphasizing the possibilities that can be fulfilled by their utilization through attracting and motivating all relevant stakeholders.
Physical activity, mental health and quality of life of women who have experienced COVID-19
Authors: Stamenković Miloš
Published: November 2023

Physical activity occupies an important place in maintaining and improving the health and well-being of individuals and the population, which is why physical activity stands out as an important lifestyle. The restrictive measures introduced due to the coronavirus pandemic have led to a significant drop in the level of physical activity, as well as an increase in anxiety and depression. The aim of this research was to determine whether there is a connection between physical activity, mental health and quality of life of women who have experienced COVID-19. The sample of respondents consisted of women between the ages of 20 and 60 (n=193). The IPAQ questionnaire (longer version) was used to assess physical activity. Selfassessment of mental health was determined by the longer version of the DASS questionnaire. Quality of life was assessed by the World Health Organization-WHOQOL questionnaire. Descriptive statistics parameters were calculated, and canonical correlation analysis was used to examine the relationship between the level of physical activity, mental health and quality of life. Canonical correlation analysis partially confirmed that there is an association between the level of physical activity and mental health parameters. There is no correlation between the level of physical activity and quality of life. In general, it is necessary for future research to include tests and measuring instruments in order to better understand the real effects of physical activity on mental and physical health after COVID-19 infection. For example, the use of an accelerometer in research would be important for an objective assessment of physical activity levels. Also, other factors that can directly or indirectly affect people's quality of life should be taken into account. Longitudinal research is necessary to examine the impact of different levels, forms and intensities of physical activity on mental health and quality of life after COVID-19 infection.
Level , types, and barriers to physical activity of 13-to 14-year-old children
Authors: Živković Danijela , Đošić Anđela , Ranđelović Nebojša , Živković Mladen , Purenović-Ivanović Tijana , Stojanović Nikola , Pantelić Saša
Published: November 2023

Physical activity has significant health benefits in young people, but many do not meet established guidelines to improve physical activity levels, which is a significant health concern. More research on potential barriers to youth physical activity participation is required to raise awareness of young people's physical activity. Based on that, the main objective of this study was to analyze the engagement of senior elementary school students in physical activities, depending on gender. In addition, factors that could be potential barriers to preventing students from participating in physical activities will be analyzed. It is assumed that there are significant differences between boys and girls aged 13 and 14 in terms of their participation in physical activities. The sample consisted of a total of 721 subjects with an average age of 14.3 ± 0.7, of which 372 were boys and 349 were girls. For the purposes of this research, a survey questionnaire (Mitić et al., 2010) was used, which contains a total of 17 questions, divided into three groups. For statistical processing, non-parametric tests, the Chi-square test (2), were used to examine the significance of the difference. The Chi-square test (2) was used to evaluate the match between the observed and theoretical frequencies in each group and measure the significance of the difference between them. The Chi-square test of independence was used to compare the differences between the male and female groups. The results of the 2 test of independence showed that there is a statistically significant difference between boys and girls in the frequency of exercise (p≤0.01). The results of the 2 test showed that there are no statistically significant differences between the groups of boys and girls in the choice of place and method of exercise (Sig. > .05). The results showed that both boys and girls have barriers to practicing physical activities, but that they do not differ significantly. This study showed that there are significant differences between boys and girls regarding the frequency of participation in physical activities. Recently, research activities in this area have increased significantly. However, there is not enough good quality research on evaluations and effectiveness of interventions, strategies for overcoming barriers to participation in physical activities, as well as on promoting physical activity for socially disadvantaged groups of children.
Intercultural competence in marketing and sales recruitment advertising: Evidence from Austria and Sweden
Authors: Pantelić Darko , Samuelsson Emilia , Brandstätter Peter
Published: November 2023

The Background: The globalization of the business world and the ongoing internationalization of many organizations have profound consequences for societies and economies. National economies, the Austrian and Swedish being the examples in this study, are globally intertwined and export dependent. When businesses search for opportunities outside national borders, employees will engage with diverse groups of stakeholders while conducting daily business and pursuing organizational goals. Additionally, due to migrations, the available workforce is becoming increasingly diverse. Business schools have an obligation to educate graduates who are "ready for life." To stay relevant, business programs, specifically in marketing and sales, need to deliver not just subject-specific knowledge but also give students the chance to increase their intercultural competence. Purpose: This study contributes to the discussion on business schools' role in improving students' intercultural competences and the necessity to align learning outcomes with future market needs. Study design/methodology/approach: The content analysis of 240 qualified recruitment advertisements was conducted to investigate, in line with signalling theory, how employers' express their requirements and expectations in recruitment advertising. Findings/conclusions: The empirical study shows that ads frequently describe work environments as culturally diverse. Most reviewed advertisements contain references to interactions with partners and customers across national borders. However, there is a weak connection between the work situation described in the ads and the skills required to tackle diversity. While foreign language and communication skills are frequently listed as requirements in those ads, intercultural competence is seldom a requirement. Even if not vocalized, evidence suggests that future graduates will increasingly need intercultural competence. Limitations/future research: The study was conducted based on a limited number of recruitment advertisements. Future research could include a wider coverage of recruitment advertisements. The qualitative research would complement findings on the need for interculturally competent graduates.
Processing and properties of scaffolds based on calcium phosphate doped with magnesium, copper and zinc-ions coated with gelatin
Authors: Dragutinović Olivera , Dimitrijević-Branković Suzana , Veljović Đorđe
Published: November 2023

The main goal of this study was to examine the possibility for obtaining macroporous scaffolds with defined properties based on calcium phosphate doped with magnesium, copper and zinc ions, coated with gelatin, which would potentially provide controlled conditions for the formation of new bone tissue after implantation. As a first, multi-doped nanoparticles of hydroxyapatite (HAp), which represents the main component of the inorganic part of bone tissue, was synthesized by autoclaving the precursor solution obtained at a Ca/P molar ratio of 1.52. Calcium in the initial solution was partially replaced by ions of magnesium (5 mol.%), copper (0.4 mol.%) and zinc (0.4 mol.%). Obtained powder was further calcinated, the changes in the morphology of the powders during calcination at 1000 ̊ C were reflected in the transition of spherically agglomerated needle-like nanoparticles of the multi-doped hydroxy-apatite powder to a spherical grained morphology. Macroporous bioceramic structures were obtained using the sponge replica method, green macroporous samples made of calcinated multi-doped powder, polyvinyl alcohol and water were sintered at 1.370°Ϲ and 1.430°Ϲ. X-ray diffraction analysis deter-mined that the presence of magnesium in the structure of hydroxyapatite favors the phase transformation of HAp into b-tricalcium-phosphate (b-TCP), which contributed to the formation of the biphasic HAp/b-TCP system during the calcination of the powders, but also during the sintering of macroporous beads. Examination of the antimicrobial activity of the obtained macroporous supports against E. coli showed a more effective degree of inhibition compared to S. aureus. A significant increase in the compressive strength of sintered macroporous scaffolds was obtained after the formation of coating based on 7.5% gelatin solution.
Recultivaction of opencast mine of clay "Garajevac Istok", near Novi Bečej
Authors: Jovanović Branka , Polavder Svetlana , Praštalo Željko , Šarac Rade
Published: November 2023

The surface exploitation of mineral raw materials is realized in the natural environment, causing the degradation of the narrower and wider space: the change of the physical appearance of the terrain and the degradation of the soil and autochthonous vegetation cover. The recultivation of the surface mine area, after the exploitation of mineral raw materials, is an important and mandatory measure in the function of environmental protection. In a biologically empty space, with damaged or destroyed natural content, in parallel with the slow and long-lasting process of spontaneous self-revitalization, technical and biological reclamation measures and procedures are applied to control and accelerate the revitalization process.The subject of this work is the design of reclamation on the surfaces affected by the exploitation of clay, on the example of the Garajevac Istok surface mine near Novi Bečej, with the aim of creating habitats for plant and animal life. The planned goals of the reclamation of the post-exploitation area of the Garajevac Istok surface mine will be realized by applying a combination of afforestation measures and spontaneous self-reclamation.
Analysis of accidents and serious incidents in aviation using Microsoft Power BI tools
Authors: Stamenić Anja , Tomić Lidija , Čokorilo Olja
Published: November 2023

Safety is a priority in aviation and for all aviation entities, including civil aviation authorities, operators, air traffic control service providers and airports. With the air traffic volume increase, there is a growth in the aviation system efficiency and therefore it is necessary to maintain a high level of safety. Practical processing of the operational data includes the representation and analysis of accidents and incidents in aviation over the certain period. The data presented in the paper are based on the location of the safety event, flight phase, aircraft type, accident frequency rate and other possible factors that can affect aviation safety. The main goal of analyzing the operational data is to raise safety awareness, as well as to maintaining safety risks on satisfactory level including safety risks mitigation measures.
Cellulose-based waste structure and chemical composition impact on the adsorption of pharmaceuticals
Authors: Vukčević Marija , Maletić Marina , Karić Nataša , Pejić Biljana , Trivunac Katarina , Perić-Grujić Aleksandra
Published: November 2023

In an attempt to reuse fibrous textile waste, and at the same time to reduce its quantity, waste hemp and flax fibers, and cotton yarn were used as cheap and sustainable adsorbents for the removal of pharmaceuticals from water. In order to improve their adsorption properties, waste fibers, and yarn samples were modified using 18% NaOH solution. Morphology, surface chemistry, and structural characteristics were examined through scanning electron microscopy, Fourier transform infrared spectroscopy, degree of surface crystallinity, and crystallinity index. Adsorption properties were analyzed through the determination of iodine sorption and water retention, as well as, the adsorption of selected sedatives. Modification with 18% NaOH increased the content of amorphous areas in examined fibers and yarn samples, improving their adsorption characteristics. Utilization of both unmodified and modified samples enables fast and highly efficient removal (adsorption efficiency ranging from 75 to 100%) of sedatives from water, making waste hemp and flax fibers and cotton yarn samples promising adsorbents for water treatment.
Textile reinforced concrete
Authors: Folić Radomir , Zenunović Damir
Published: November 2023

Textile-reinforced concrete (TRC) is a reinforced concrete, where steel reinforcement is replaced with textiles or fibers. Textile reinforcement is a material consisting of natural or synthetic singular technical fibres processed into yarns or rovings which are woven into multi-axial textile fabrics having an open mesh or grid structure. In the paper an overview of tests results related to mechanical properties, deformation properties and durability characteristics of textile meshs are presented. Applications of different textiles as reinforcement in TRC is analyzed through some realized projects. TRC has been successfully employed for strengthening or repair of damaged structural elements and lightweight, thin structural elements (precast thin-walled elements, shells, tanks, pipes, pedestrian bridge, waterproofing structure, integrated cladding systems, external insulation system).
The most important physiological properties of short men's socks depending on the raw material composition and the stitch design
Authors: Tasić Predrag , Trajković Dušan , Geršak Jelka
Published: November 2023

The research is focused on checking the most important physiological properties of short men's socks depending on the raw material composition. Men's socks are mostly made of bamboo, cotton or a cotton/polyester blend, the composition includes filament polyamide yarn as well as wrapped rubber thread. The stitch design is rib construction with a different number of loops on the face and back. The following basic measurements of the sock knit were made: thickness, horizontal and vertical density, loop length, surface mass and porosity. The physiological properties of the socks were checked through the following parameters: relative humidity, water retention capacity, water vapor permeability and air permeability. The raw material composition and the weave of the socks were found to affect the physiological properties, making this knitted textile article more or less moisture permeable. The obtained results defined the choice of the basic yarn for the production of socks, according to the conditions of use, as well as the choice of the most important parameters of knitted fabrics in order to ensure optimal physiological comfort when using socks.
Wastewaters originated from the textile industry
Authors: Ketin Sonja , Andrejić Marko , Čabarkapa Obrad , Biočanin Rade
Published: November 2023

Human population is growing so the amount of produced wastewaters has increased considerably. Such toxic wastewaters are dangerous for sea, lakes and groundwater, endangering the survival of life on Earth. They also promote the development of oxygen-consuming microorganisms that lead to fish death and the development of pathogenic microbes. The textile industry creates waste water in the production process and such water needs to be cleaned prior to discharge into the watercourse.