In order for an obligation contract to produce a legal effect, it is necessary to fulfill the conditions stipulated by the law for its creation and validity. The absence of any of these conditions renders the contract legally invalid. The Law on Obligations of the Republika Srpska mostly accepted the dual division of invalid legal transaction...

By Zoran Filipović, Jelena Latinović

 Incorporating phase change materials (PCM) into building structures as passive latent heat thermal energy storage technologies offers a potential solution for reducing energy demand and regulating thermal comfort in occupied buildings. Integrating PCM into lightweight walls can improve their thermal performance by increasing building heat cap...

By Biljana Vučićević, Dragoslav Mrđa, Valentina Turanjanin, Predrag Škobalj, Milica Mladenović

 Introduction: Variable values of meteorological factors may influence the development of acute exacerbations of chronic obstructive pulmonary disease (AECOPD), but there are few studies available on this subject. This study's objective was to determine whether such effects are existent in patients residing in Novi Sad, Serbia. Methods: In thi...

By Jovan Javorac, Dejan Živanović, Jadranka Đuranović Miličić, Svetlana Stojkov, Dragan Đuranović

 Digital revolution and globalization have drastically been changing the way people think, behave and communicate with one another, as well as their way of functioning and performing business. The new way of creation of knowledge, education and information distribution has changed the economic and business practice on a global level. Interdepe...

By Gordana Prlinčević, Marija Marčetić, Marina Jovović

 The job design of health organizations is one of the ways to provide motivation and job satisfaction, which are key determinants of the quality of health care. In this context, the research of social, motivational and contextual factors of job design is most often performed. However, results often show that there are differences in the percep...

By Danijela Nešić, Marko Slavković, Nikola Jerkan

 At the beginning of the paper, the authors point out that sport, in addition to having positive effects, can in some cases generate violence that is unacceptable. In this regard, violence in sports is immanent to all social epochs. As the existing concept of retributive justice embodied in criminal law (does not) give appropriate results, it ...

By Darko Dimovski, Dragana Milovanović

 Domestic bentonite clay (location Šipovo, Republika Srpska, BiH) is characterized by good structural, textural and morphological characteristics, and has the possibility of wide industrial application. Literature research has shown that the characteristics of this clay can be improved by various methods of modification, and then used f...

By Zoran Petrović, Ana Đokić, Tatjana Botić, Sabina Begić, Dragana Kešelj, Milena Milovanović

 More and more modern agricultural crops require an increasing amount of agrochemicals, however, as modern agricultural mechanization cannot meet the targeted delivery of conventional agrochemicals, over time, soil saturation occurs. After a number of years, agrochemicals become poison for the land on which they were used, and when the land is...

By Ljiljana Tanasić, Jelena Tanasić, Ivan Ristić, Nemanja Stošić, Milan Blagojević

 STEM education is an educational approach focused on the integration of science, technology, engineering, and mathematics in the creation of student-centered learning environment for the examination of real-life phenomena [1,2]. The benefits of the STEM implementation within school environment are reflected in the increasement of students&rsq...

By Jovana S. Marjanović, Marina D. Kostić, Vera M. Divac

 Teaching methodology is a special discipline that requires a special approach and way of working with children, through theoretical and practical aspects of teaching, where students would be practically ready to pursue their profession. We reject memorization altogether, we are not saying that everything was not good before, but we are strong...

By Dragana Aleksić