Standalone hybrid renewable energy system (SHRES) is based on strengths and complements of two or more energy sources for the power production, where at least one is a renewable. This paper intends to highlight possibilities of SHRES application for a telecommunication station power supply in a remote mountainous site in southern region of Bosnia and Herzegovina (B&H). The feasibility of such system highly depends on resources potential at a specific site. Solar PV/Wind/Diesel generator hybrid system with batteries as a backup is proposed in this paper. System modeling and analysis are performed in HOMER software, based on the load requirements and the solar and wind resource potential at the site under investigation. Optimal component sizing and system configuration are proposed as a result of conducted techno-economic feasibility analysis.

Size and complexity of power systems impose significant challenges for the power system analysis and control. As the power system becomes more complex there is a great need to develop improved and sophisticated tools for power system analysis and simulation. These tools should be able to accurately replicate real events that occur in electric power network and help to understand dynamics of changes. A number of software packages have been developed for power system research, analysis, planning, designing and teaching. This paper describes how to utilize an electric Power System Analyzer (PSA) as a useful instrument for power flow studies. The analyzer is designed to be user-friendly, easy-to-use, with the ability to optimize power flow and to visualize the effects of changing problem parameters. PSA can handle power system networks up to 100.000 nodes.

OBJECTIVE The aim of this study was to assess the frequency of experience in school bullying and family violence, satisfaction with the preventive-promotional program, knowledge about methods for opposing violence and attitudes toward the role of the family physician in bullying prevention. MATERIALS AND METHODS The project was conducted by family physicians, nurses and sixth year medical students. The target group were 5th to 8th grade pupils of two primary schools randomly selected by computer. Basic information about the presence and types of bullying, the long-term consequences of violence and methods to oppose violent behavior was given as an interactive lecture to large groups of pupils. After the lecture, pupils received questionnaires about their experience of school violence, satisfaction with the program and their opinion about the role of the family physician in bullying prevention. RESULTS The results of the short term outcome evaluation of the program show that younger pupils evaluate the program better than older ones. Furthermore, we found that the frequency of experienced violence is not connected with satisfaction with the program. CONCLUSION Most students have never experienced violence in schools and families, 5th and 6th grade students showed greater satisfaction with training, better knowledge of help in case of violence and a more positive attitude towards medical help. We found no significant differences in pupil's satisfaction with the program, knowledge about methods of opposing violence and attitudes towards the role of the family physician in bullying prevention, in relation to the frequency of experience of family violence and school violence.

OBJECTIVE Poor and inadequate communication affects the therapeutic relationship between doctors and patients. Guided by this idea, we organized a minor elective course entitled "communication skills". We wanted to bring closer to the students the holistic approach of the family physician to the patient, the importance of the family, its impact on the patient and vice versa, and the significance of the local community and its influence on an individual's health. The aim of this article is to explain how we organized this elective course. METHODS The course was organized in the form of 12 hours of theory (3 lectures and 9 seminars) and 24 hours of practical training. There were 26 students from all years. Through theory, and even more through the practical part the students met with different types of patients. RESULTS At the end of the course, students in lower years were evaluated by means of an interview, and graduate students through a practical test - a conversation with a patient. The initial results, including the students' grading of this course, were highly encouraging. Both teachers and students were highly satisfied on completion of the course. CONCLUSION Content on communication training is rare in teaching. Practicing communication skills will empower the doctor - patient therapeutic relationship.