Resource efficiency in the brewing industry involves the use of energy and water with minimal wastage and negative environmental impact. As it is often impossible to maintain the recommended parameter values in the actual operation of the plant, due to a number of disturbance factors, it is necessary to find an easy and efficient way to maintain the parameter values in the relationships that result in the least possible losses. This paper presents the use of a software simulation model for the purpose of simulating the operation of a wort preheater, with the aim of managing its operation in a real environment with maximum resource efficiency.

U oslobođenom Sarajevu je od 26. do 28. aprila 1945. godine održano treće i posljednje ratno zasjedanje ZAVNOBiH-a. Odlukama Trećeg zasjedanja ZAVNOBiH-a je zaokružena državna struktura federalne Bosne i Hercegovine, ZAVNOBiH se konstituisao u Privremenu Narodnu skupštinu Bosne i Hercegovine i donesen je Zakon o Narodnoj vladi Bosne i Hercegovine. Nakon što su odlukama Drugog zasjedanja ZAVNOBiH-a, održanog od. 30 juna do 2. jula 1944. godine u Sanskom Mostu, narodnooslobodilački odbori ozakonjeni kao lokalni organi državne vlasti, na Trećem zasjedanju ZAVNOBiH-a promijenjeni su nazivi mjesnih (lokalnih) organa državne vlasti u seoske, opštinske, gradske, sreske, okružne ili oblasne narodne odbore. Nazivi narodnooslobodilački odbori zamijenjeni su nazivom narodni odbori, što će kasnije biti potvrđeno prvim Ustavom Narodne Republike Bosne i Hercegovine iz 1946. godine. Tokom poslijeratnog razvitka njihov karakter i uloga kao organa vlasti postepeno su se mijenjali od lokalnih organa državne vlasti u administrativno-teritorijalnim jedinicama do položaja opšteg predstavničkog tijela lokalnih zajednica opština i srezova, kada su evoluirali u nove predstavničke organe – opštinske, odnosno sreske skupštine. Ustavom FNRJ i Opštim zakonom o narodnim odborima od 1946. godine narodni odbori su ozakonjeni kao osnovni organi vlasti nove državne organizacije. U radu je elaboriran proces razvoja mreže narodno - oslobodilačkih odbora između Drugog i Trećeg zasjedanja ZAVNOBiH u cjelovit sistem institucionalne organizacije državne vlasti.

Strategic renovation of existing building stock is strongly promoted in Energy Efficiency Directive and Energy Performance of buildings directive. Measures at the envelope are usually combined with replacement of existing heating system. This paper deals with situation where existing radiator system are connected to heat pump instead of previously installed old boiler for heating. Designers of these systems rely on bin method which is well designed for new systems. However, in case of existing systems several factors determine the available power from heat pumps such as: oversized radiators, over-or under flow of hot water in existing system – both influencing the return temperature or inlet temperature to heat pump. It is demonstrated that in some cases available and declared capacity of the pump is overestimated which is result of neglecting previously mentioned factors. In this paper the adaptation of existing bin method according to standard EN 14825 is proposed which fits any existing system. Calculations are performed and results are presented for the baseline condition and three scenarios – two with radiator system and one with underfloor heating. Advances of improved methodology for calculation are highlighted and the conclusions are presented at the end.

Introduction. The aim of the study was to examine the correlation between subjective well-being and quality of life of the elderly in relation to their demographic characteristics, health, social and financial status. Methods. The study sample was comprised of 159 subjects of both sexes and of older age. The respondents underwent research in Banja Luka in the premises of the Association of Pensioners of the Republic of Srpska, senior citizens' clubs when coming to some of financial institutions to get help, to open bank accounts etc., as well as in the premises where pensioners gather to socialize and communicate. The survey questionnaire developed for the purpose of the paper and adapted to this population was used in the study. The survey questionnaire consisted of the following elements: sociodemographic data, self-assessment concerning the quality of life and Quality of Life Scale for the Elderly. Results. The study included a total of 159 subjects, 56.6% males and 43.4% females, of whom the majority were 65-75 years old (67.3%). The average health status (M = 2.17; SD = 0.68) was higher than the expected value, while the social status (M = 1.93; SD = 0.60) and the social needs (M = 1.91; SD = 0.72) were slightly lower compared to theoretical mean. Furthermore, the financial status had an average value (M = 2.08; SD = 0.59). The distribution of social needs was unsatisfactory. The obtained value of the Self-Perceived Quality of Life Scale was within the range of the theoretical mean values (M = 5.54, SD = 2.47), indicating that the distribution of the obtained quality of life values was symmetrical. Conclusion. Financial status significantly affects the quality of life of the elderly. The distribution of social needs is unsatisfactory. The level of education significantly affects the quality of life: highly educated respondents have a better health, social and financial status compared to the elderly with a lower level of education.

On the occasion of the 11th Days of Academy of Medical Sciences of Bosnia and Herzegovina and 3rd Seminar about Writing, Editing and Publishing (SWEP) at Holiday hotel in Sarajevo was organized webinar about COVID-19 Pandemic experiences in Bosnia and Herzegovina. During the webinar members of the Academy from Bosnia and Herzegovina, Croatia, Serbia, North Macedonia, Poland, and USA participated with very interesting presentations (1-5). We also presented lecture about our institution and our professional experiences during pandemic time. Some of important facts which we presented are mentioned in this letter to editor. Medical Institute Bayer (MIB) is a continuation of the BH Heart Center Tuzla, which was founded in 2008. The goal of establishing the Center was to build a modern, functional hospital that will meet all prescribed norms and standards, and eliminate all limiting factors in the development of cardiac surgery, interventional cardiology and vascular surgery (Figure 1).

As youth find it easier to embrace new ways of thinking, this research sought to send important lessons/messages and develop awareness of the importance of energy efficiency and the use of renewable energy. Therefore, by continuing to educate and inform youth about these issues, they would directly influence both their own and the awareness of their parents or households in which they reside, with the aim of encouraging proper energy management, so that at the end, each family, through proper behavior and implementation of appropriate measures, with little additional cost, could save on energy costs. According to the foregoing, the main objective of the research is, in fact, to investigate knowledge levels of students in the 1 st cycle of studies at the Faculty of Economics and Business of University of Tuzla, in the field of energy efficiency and renewable sources. The methodology used in the paper is based on the use of primary (survey questionnaire) and secondary (desk research) data sources. The research results have shown a very low levels of knowledge and awareness of youth about the importance of energy efficiency and using renewable sources of energy, about the lack of informative and promotional activities in this field, as well as about the interest in environmental protection and energy consumption. Finally, insufficient involvement of youth in the decision-making process regarding energy efficiency and renewable energy was detected.

Background/Aim: Benign prostatic hyperplasia (BPH) is a very common disease in older men. BPH involves the presence of signs of hyperplasia of the stromal and epithelial elements in the prostate with consequent enlargement of its volume. The aim of this study is to analyse the frequency of typical complications in the treatment of patients with benign prostatic hyperplasia and the effect of medicamentous treatment. Method: Patients diagnosed BPH were included in the prospective, one-year study. They were divided into 2 groups. The first group (30 patients) consisted of those ones, whose prostate volume was equal to or over 50 cm 3 , while and the second group (30 patients) comprised the subjects with prostate volume less than 50 cm 3 . The complications of BHP analysed are residual urine (RU), symptomatic urinary infection, haematuria, thickening of the detrusor wall, diverticulum in the bladder, ureterohydronephrosis, renal failure, bladder stone and acute urinary retention (AUR). Results: The majority of patients in both groups were aged 60-69. There was a statistically significant difference in the average value of RU between the groups at the first, second and fifth check-ups (p < 0.05), as well as the complication of symptomatic urinary infection, since the same occurred earlier in the first group than in the second group (p < 0.05). There was no statistically significant difference in complications: haematuria, detrusor wall thickening and diverticulum (p > 0.05). Complications: ureterohydronephrosis, renal failure, bladder stone, and AUR were not diagnosed in patients in either group. Conclusion: Relevant medical therapy leads to a reduction of RU and reduces the risk of complications caused by its presence. Other complications of BPH were rare or absent in both groups, suggesting that appropriate and timely applied medical therapy affects the course of BPH and reduces the risk of complications and the need for surgical treatment. Benefit from medicamentous therapy is equally repre-sented in both analysed groups of patients.

The paper analyses Milena Dragićević Šešić's contribution to understanding of the concepts of interculturalism and transculturalism in the theory and practice of cultural production in Yugoslavia, in the period from the 1980s to 2020, with a special emphasis on three important books that the author considers particularly representative for elaborating these concepts. The ways in which Milena Dragićević Šešić first introduces these concepts into Yugoslav theoretical and professional discussions, and then develops, applies and re-examines them, follows the developmental path of her overall theoretical, pedagogical and activist engagement over more than forty years of active work. The paper shows how the approach to the concept of multiculturalism and interculturalism in Milena Dragićević Šešić's works has developed through the interdisciplinarity and transdisciplinarity of her research and how it marked her approaches to cultural production, distribution and consumption, as well as her social engagement in the turbulent times in the Balkans from the twentieth to the twenty-first century.

Background/Aim: Colorectal metastatic liver tumours are the most common secondary liver tumours. During the life of patients with colorectal tumorous, this liver metastases will develop either synchronously or metachronously in half of the patients. Approximately 25 % of patients with colorectal cancer diagnosis have secondary deposits in the liver and the additional 25 % of patients will develop metastases within five years. The objective was to investigate whether anatomic resections of the liver present a method of choice in surgical treatment of colorectal liver metastases compared to metastasectomy surgery. Methods: A total of 65 patients were divided into two groups. Patients in the first group underwent metastasectomies consisting in the removal of metastases and the surrounding liver parenchyma no more than 1 cm by Kelly clamp crushing technique or LigaSure vessel-sealing system. Patients in the second group were subjected to the anatomic resection of the liver where not only metastases were removed, but also the associated anatomical segment or section or half the liver, depending on the number and localisation of metastases. Results: The mean values (± standard deviation) of the overall survival for the first and the second group were 36 ± 4.8 months and 36 ± 2.6 months, respectively. The mean values (± standard deviation) of the disease-free survival in the first and in the second group were 18 ± 2.22 months and 22 ± 0.74 months, respectively. None of the found inter-group differences were statistically significant. Conclusion: It can be concluded that metastatic surgery for colorectal liver metastases and anatomic resections have almost the same results and are irreplaceable methods in the treatment of colorectal liver metastases.

Introduction: Cognitive abilities are defined as the awareness of immediate discovering, rediscovering, and recognizing information in various forms, understanding, and comprehension. Objective: To examine the cognitive impairment rate and its effect on the functional status of elderly persons, retirement home beneficiaries. Method: The research has been designed as a cross-sectional study, including 110 elderly persons. Research instruments comprised a general questionnaire, Katz index of independence in activity of daily living, Lawton instrumental activities of everyday life, and Mini-mental state examination. The statistical test used was the ch2 test, while Pearson's correlation analysis was used for correlation analysis. Results: Out of the total number of subjects, 60% had an impaired cognitive status. When it comes to functional status, assistance was necessary for 79.2% of the subjects. Statistically significant weak positive correlation existed between the subjects' cognitive status and their functional abilities (r = 0.331; p<0.001; r = 0.386; p<0.001). Conclusion: The cognitive deficit rate was high in the retirement home subjects. Cognitive deficit brings about a significant decline intellectual functioning and undermines the subjects' daily living activities.

The concept of proper nutrition implies meeting the needs of the body concerning daily energy intake and a sufficient amount of nutrients and protective substances necessary to maintain the physiological functions of the body and its health. Nutrients are divided into macronutrients (proteins, carbohydrates and fats) and micronutrients (vitamins and minerals). Accelerated growth and development during adolescence increase nutrient requirements. Therefore, energy and nutrition requirements must meet the needs of adolescents. During their growth and development, there is an increased need for vitamins and minerals, especially for calcium, iron, zinc and vitamin D. During intensive growth, adolescents require more vitamins, especially B-complex vitamins and vitamin C, the intake of calcium and phosphorus is necessary as well, and the insufficient needs for proteins affect the development of muscles and energy levels. Proper nutrition and eating habits during the period of growth are of the utmost importance for the appropriate physical, psychosocial and cognitive growth and development of a child. Eating disorders usually occur as a result of low or high energy intake, and the most common types of these disorders are anemia, anorexia and bulimia, obesity and comorbidities, and poor eating habits. When it comes to the implementation of various programs concerning the prevention of bad eating habits and eating disorders, the school management, expert teams and student parents should bear the overall responsibility. Once or twice a year, preventive check-ups and BMI measurements are recommended to identify eating disorders.