This paper sets out the methodology and presents the results of calculation the efficiency of transport system in separation of the OP "Dimnjače", based on the data of monitoring the operating time and downtime/failure. Properly determined state of operation of the transport system, allows preventive measures and selection of maintenance strategy. Data collection lasted a year, and the data were analyzed, and thus the results are given by month for the transport system as a whole.

| The aim of this study was to morphologically describe the air sac system in Rosy-faced parrots (Agapornis roseicollis) and provide useful data for future veterinary care and treatment of respiratory system diseases in these pets. The research was conducted on five birds. In order to obtain the casts of the air sacs, we applied the corrosion cast technique, where we used the 26% solution of Vinylite mass. The research showed that the anatomy of the air sacs in these parrots was very similar to that in other birds, but there was some specific characteristic regarding the arrangement and connection between the air sacs. In Rosy-faced parrots we identified nine air sacs, the one unpaired, saccus clavicularis and paired saccus cervicalis, thoracicus cranialis, thoracicus caudalis and abdominalis. The casts showed that clavicular and cranial thoracic air sacs established a connection through the diverticula sternalia. These anatomical characteristics can be common to birds from Psittaciformes order and additional research need to be performed to confirm these findings.

There is a view that playing sports is positively related to pupils' academic achievement. Results of studies worldwide indicate this correlation, while few studies have been done in Bosnia and Herzegovina on this problem. The current study aims to expand on findings from previous studies by examining associations between (1) mode: active vs. recreational); (2) type: individual vs. team based and (3) a particular kind of sports and academic achievement particularly math achievement among middle school children. Population involves middle school pupils in two urban areas in Bosnia and Herzegovina and research sample consists of 1036 female and 1055 male pupils wanting to take part in study voluntarily. Kruskal-Wallis and Wilcoxon test were conduced to obtain results. Results show that middle school pupils who are actively involved in sports have better overall midterm academic success as well as better mathematics achievement compared to those who are involved in sports recreationally or not at all (p < 0.001). On the other hand, differences do not occur between pupils who are engaged in team or individual sports. Also, pupils who practice football were found to have lower school performance compared to pupils who practice some of the other sports.

The purpose of this research is to provide some insights into socio-demographic determinants of predicting the likelihood of residents propensity to travel. Using the quota sampling technique, data collection was carried out from October to December 2019, yielding a sample of 632 valid responses. To gain a better understanding of the sociodemographic determinants of propensity to travel, we, primarily, use descriptive statistical analysis, chi-square test and probit regression model. The research findings have revealed that age, education and household income characteristics may be considered as antecedents of travel propensity of residents. Having in mind the impact that Covid-19 pandemic has on sector of tourism worldwide, and based on the results of this research, policymakers' efforts should be directed to promoting local tourist destinations and to enhancing tourism literacy of residents.

The purpose of this research is to provide some insights into relationship between decisionmaking heuristics and perceived quality of life. Using the purposive sampling technique, data collection was carried out, in Bosnia and Herzegovina, from June to October 2020, yielding a sample of 319 valid responses. To gain a better understanding of the relationship between decision-making heuristics and the perceived quality of life, we, primarily, use descriptive statistical analysis, chi-square test and probit regression model. The research findings have revealed positive association between all three decision-making heuristics, i.e. representativeness, anchoring, availability, and perceived quality of life. Furthermore, the group with above-average perceived quality of life have higher representativeness, anchoring, and availability scores comparing to the group with below-average perceived quality of life. These differences are statistically significant. Furthermore, out of three decision-making heuristics components, availability, or a heuristic whereby people make judgments about the likelihood of an event based on how easily a similar example comes to mind, seems to be the strongest predictor of the perceived quality of life. Memories that are easily recalled are often insufficient for estimating likelihood of occurring similar events again in the future. In that respect, availability may produce low-quality information in the decision making process. Ultimately, this may lead to bad decisions.

The purpose of this study was to evaluate the relationship between knee extensor and flexor muscles strength and vertical jump in professional female volleyball players. Forty-one female volleyball players participated in this study. Isokinetic PT and was measured at 60°/s, whilst CMJ performance using a force plate. The participants were later divided to WG (weaker group - PT/BW<2) and SG (stronger group - PT/BW>2). Isokinetic concentric knee extension and flexion PT was significantly correlated with CMJ performance. However, higher correlation coefficients were obtained at the non-dominant leg. No significant differences were found but mere trend favoring non-dominant leg muscles in the weaker group. Strong positive correlation exists between isokinetic knee PT and CMJ height in professional female volleyball players. When divided and compared to WG and SG the results indicate weaker players tend to modify their technique individually and towards unilaterality as so they could maximize their performance.

Introduction : Obstructive Sleep Apnea (OSA) represents the complete or partial obstruction of the airway. Clinically OSA manifests as sleepiness during the day, heavy snoring, and waking up during the night due to lack of air. Obesity, gender and orthodontic anomalies are listed in the literature as the etiologic factor of OSA. Aim : This study aimed to find the correlation in the analyzed studies between OSA and orthodontic anomalies in non-obese adults. Material and methods : The electronic search of the database was performed (PubMed and Google Scholar) to find relevant articles that correlate orthodontic anomalies with OSA. Keywords included: obstructive sleep apnea, orthodontic anomalies, cephalometric analysis, impact, association, body mass index, obesity, adults, non-obesity. Included criteria: non-obesity, a study published from 1999-2019, a study in English, full text. Results : Two hundred papers included keywords. The number of papers that included the full set criteria was nine. These nine papers were analyzed in detail. Conclusion : Analyzed articles showed that there is a correlation between Obstructive sleep apnea (OSA) and orthodontics malocclusion in non-obese adults. by time of publication of articles, availability of research, a language in which they were published, and data relevance.

of the age group of 6–12 years, and 10 patients of the age group of 12–18 years. Conclusions: Data suggest that pediatric cases of COVID-19 in adolescents have more severe symptoms than in the other age groups; however, in general children tend to cope much more easily with the virus than adults.

Introduction: Conventional cytogenetics by the use of standard karyotyping allows the study of numerical and structural chromosomal aberrations. Haematological malignancies include a number of cancer types that originate in the blood cells of the bone marrow or of the lymphatic system. Cytogenetic methods are traditionally used for the sake of diagnosis and prognosis of these diseases. However, with the ever more frequent use of molecular methods in the diagnostic laboratories, the importance of the conventional cytogenetic analysis in the diagnosis of haematological diseases needs to be reassessed. Aim: To evaluate the role of cytogenetic methods in the diagnosis of haematological malignancies. Materials and Methods: A retrospective analysis of cytogenetic findings of 146 patients with various haematological malignancies was performed. All of the findings were made over a period of three years at the Centre for Genetics at the Medical Faculty of the University of Sarajevo in Bosnia and Herzegovina. Microsoft Excel 2019 was used for the analysis and presentation of data in the form of tables and graphs. Results: The results of the present study showed that the use of conventional cytogenetic analysis is a good diagnostic method for 50.68% (74) of patients in whom chromosomal aberrations were detected. Conclusion: Cytogenetics remains the most comprehensive method for assessing chromosomal abnormalities due to its ability to detect clinically relevant aneuploidies and additional cytogenetic abnormalities that cannot be detected by locus-specific assays.