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Background: Transplantation of cells, tissues, and organs enables many patients to regain impaired organ function, promoting healing or prolonging life and improving overall quality of life. Objective: The aim of this study was to assess the knowledge and attitudes of students in Federation of Bosnia and Herzegovina regarding organ donation and transplantation of organs. Methods: A cross-sectional study was carried out with 255 students from four different faculties in Federation of Bosnia and Herzegovina, with the majority enrolled in either the Faculty of Medicine or the Faculty of Health Sciences. The students collected data using a self-administrative questionnaire, providing sociodemographic characteristics, knowledge and attitudes about organ donation and transplantation. Statistical analysis was performed using Microsoft Excel version 3645 and R studio v2024.04.2, based on R 4.4.1. Results: Out of all students, 49 of them (19.3%) demonstrated poor knowledge, while 131 students (51.6%) exhibited average knowledge. Analyzing the data by Faculty type revealed significantly higher levels of knowledge among students in Medical and Health faculties compared to those in the Educational Science Faculty (χ2=10.196, p=0.006). Regarding attitudes, 56 students (22%) had a negative attitude, while 117 students (45.9%) had a highly positive attitude. Only 13 students (5.1%) owned a donor card. Conclusion: Students from Faculty of Medicine and Faculty of Health Sciences generally possess higher basic knowledge about organ donation, yet despite this knowledge, their attitudes toward organ donation often remain negative. It is essential to implement effective strategies aimed at raising awareness and fostering a positive attitude toward organ donation.

In this paper, a simulator for assessing the possibility of PV integration to the medium voltage distribution network is developed. The PV location and peak power are defined in advance. The simulator is based on sequential Monte Carlo simulation with various possible uncertainties such as photovoltaic production and load. In addition, the sequential simulation enables detection of period when the network constraints are violated. For this analysis, time series of essential variables such as PV system production and load are modeled. Based on the results of power flow calculation, probability distributions of the voltage at various nodes, the loads on individual lines as well as the probability of network constraints exceeding are determined. Depending on the network constraints, possibility of connecting the PV system to the network at the desired location is assessed. The power flow calculation is executed by using the OpenDSS simulator, while the input time series are prepared in Matlab. The method presented in this paper is tested on IEEE 33 distribution test network.

In this paper an experimental analysis was done aiming at studying the possibility of applying Peltier thermoelectric modules for building heating, more precisely, the optimization of a heat exchanger was performed. The concept of the system was designed to work without freon and harmful impact on the environment. The paper aims to develop a detailed mathematical optimization model of the existing heat exchanger for space heating by natural convection. Based on the optimal model, the new aluminum heat exchanger was created. The experiment was designed so that the Peltier elements were positioned on the heat exchangers and the input current and temperatures were measured. Firstly, experimental measurements were performed for the existing commercial heat exchanger, and, then, measurements were repeated with a new optimal heat exchanger under the same conditions. The coefficient of performance of a space heating system using a Peltier thermoelectric generator has a low value if the system operates with natural convection and heat exchangers without optimal fin spacing. Optimizing the distance between the fins on the heat exchanger provides an increase in heat flow by convection almost up to ten times and the coefficient of performance increases more than three times. This work has mathematically and experimentally confirmed that there is optimal fin spacing for finned heat exchangers with natural convection.

Background: The Out-of-hospital cardiac arrest (OHCA) remains a major public health challenge worldwide, with survival outcomes heavily influenced by early intervention. The presence of an initial shockable rhythm significantly increases the likelihood of survival when combined with timely cardiopulmonary resuscitation (CPR) and defibrillation. Objective: To analyze patient outcomes and the incidence of bystander and dispatch-guided CPR in cases of OHCA with an initial shockable rhythm treated by physician-led emergency medical teams in Bosnia and Herzegovina. Methods: Data for this study were collected over a 5-year period, from January 2019 to September 2023, using the Utstein protocol. Hospital records were analyzed to determine patient outcomes, with a focus on the 30-day survival rate and favorable neurological outcomes. Instances of dispatch-guided and bystander CPR were recorded for each case based on available patient records. Results: In this study, 1,020 patients were included, with 151 cases (14.8%) having an initial shockable rhythm, of which 14.3% of males and 4.4% of females achieved return of spontaneous circulation (ROSC). ROSC rates varied by year, with the highest in 2019 (20.4%) and 2022 (17.9%). Thirty-day survival with a good neurological outcome was observed in a small percentage of cases. The initial shockable rhythm was found to be statistically significant (p<0.001) for achieving a good neurological outcome after 30 days. Dispatch-guided CPR was attempted in 12.9% of cases, with success in 1.9%. Bystander CPR was performed in 1.4% of cases, and only one case involved the use of an automated external defibrillator (AED). The median response time for successful resuscitations was 2 minutes, while for unsuccessful resuscitations, it was 6 minutes. The findings emphasize the role of age, initial rhythm, and response time in determining outcomes for OHCA patients. Conclusion: The promising survival rate of OHCA patients, despite limited bystander CPR, highlights the impact of short response times and skilled physician-led teams, underscoring the need for public education and a unified registry to address gaps and better understand OHCA epidemiology in Bosnia and Herzegovina.

Background: In the year 2024 Bosnia and Herzegovina (B&H) celebrates 130 years anniversary of establishing the Regional hospital in Sarajevo (Landesspittal) which played great role in healthcare protection of B&H population and also of education over 60 percent of medical staff in B&H. Great role have had also a lot of other medical institutions in B&H, most of them established and organized during Austro-Hungarian period. Objective: The aim of this article was to describe historical facts how mentioned institutions were founded and what was importance of functioning all of them during the past. Methods: The author searched important historical facts about establishing and works of hospital anf other institutions and their roles in healthcare protection of population in B&H in period from 1878 until 1941. using facts published in the books and articles deposited in indexed databases PubMed Central, Scopus, etc. Results and Discussion: During Ottoman Empire were established 5 Waqf''s hospitals (Sarajevo, Tuzla, Banja Luka, Mostar and Travnik by Governor Sherif Osman Topal Pasha (1861 until 1869)). After Berlin Congress and ocupation by Austro-Hungarians for 6 District - 6 Governments (Sarajevo, Banja Luka, Bihac, Travnik, Tuzla and Mostar, Bosnian Council has appointed district medical references, and in 66 districts (counties) were set up district, and county medical officers, mostly doctors. In each county council there was a sanitary commission of 3 members (the district doctor, a police officer and municipal councilor), whose task was to carry out sanitary control (inspection). The Medical Department of the Provincial Government published the relevant legal acts and regulations at the state level, The first official hospital established in B&H was Land hospital opened in 1894 and had 303 hospital beds in 4 departments: the first Internal Department with diseases of the throat and nose (not the ear) with 45-50 beds, the Second - Surgical Department with ophtalmology (for ear surgery) with 45-50 beds, the Third - Dermatology and Venerology ward with 70-80 beds and the fourth - Gynaecology-Obstetrics Department with 70-80 beds. It will be a good basis for training future teachers pioneers of medicine and generations of medical students attend the 80 years of study in Sarajevo. True, most students of this generation will be mobilized during the war, some will move on to medical faculties in other cities Tuzla, Banja Luka, Mostar, Foca, Zenica, Bihac. The first Faculty of Medicine in Bosnia and Herzegovina officialy established in November 16th 1946. Conclusion: All institutions described in this article played important role in the history of healthcare education and healthcare protection.

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The main objectives of this study were to 1) assess the following quantitative urban green space (UGS) indicators: share of UGS, total UGS per capita, and the public UGS per capita for Sarajevo and its corresponding municipalities; 2) propose the minimum area of UGS per capita and the minimum functional UGS area per capita; and 3) discuss the methodological approach used and its applicability and relevance for UGS quantity and quality assessment. UGSs were photo-interpreted based on or-thophotos and Google Satellite images and mapped manually. The total UGS area for Sarajevo is 58.5 km², with continuous green spaces present in hilly and mountainous areas of the city, whereas more built-up zones are present in flat areas. The total public UGS per capita is 28.0 m², or 9.8 m² if forest parks are excluded. The results can help in better understanding UGSs in Sarajevo and can serve as a reference for decisionmakers and policymakers.

Background: Urgent surgical treatment of bleeding gastric and duodenal ulcer is indicated in cases where there is no treatment by an interventional gastroenterologist and radiologist readily available, or there is no satisfactory response to the applied interventional procedure. Objective: The aim of our study is to show that there is the still large number of patients with massive bleeding gastric or duodenal ulcers who had to undergo emergency surgery, in order to achieve hemostasis, provide survival analisys, and to present a methode of the surgical procedure which we perfomed. Methods: This study analysed 49 patients in the period of 5 years (2013-2018), who underwent emergency surgery due to bleeding ulcer. All patients had one or more gastroscopies in order to stop the bleeding, which were ineffective. Surgical treatments which are used in managing ulcer bleedings depended on the localization of the lesion and how severe the bleeding is. Indicated treatment is direct compression of a bleeding blood vessel (ulcer niche), truncal vagotomy, pyloroplasty, gastroduodenal artery ligature, ligature of the right gastroepiploic artery. Resection procedures were performed as well: antrectomy, proximal, subtotal and total gastrectomy. All surgical treatments aimed to preserve the patients of gastrointestinal tract where such an approach could be carried out. Results: There were total of 49 patients who underwent surgical treatment of bleeding ulcer of which 31 are male (63,27%) and 18 are female (36,73%). The survival was 38,78% (19 patients); mortality 61,22% (30 patients). The most common surgical treatment was direct suture of a bleeding vessel with a ligature of the gastroduodenal and right gastroepiploic artery. When we observe the results of resection procedures subtotal gastrectomy was most commonly used. Surgical procedure performed were bilateral vagotomy, ligature of gastroduodenal and right gastroepiploic artery if the ulcer is localized in the antral, pyloric or duodenal region and not penetrating showed that there is no need for gastrotomy/duodenotomy and direct suturing of the bleeding vessel significantly reduces operative procedure, and saves the patient from additional surgical trauma and allows the desired hemostasis. In 5-10% of patients with bleeding ulcers, emergency surgery is indicated due to massive bleeding and hemorrhagic shock and then surgery is the only chance of survival. The primary goal of any surgery for bleeding ulcer is to establish bleeding control. massive ulcer bleeding. All these patients did not have the opportunity to avoid surgery and stop the bleeding with the treatment of an interventional gastroenterologist and radiologist. Survival is 38.78%, mortality is still high 61.22% but it is encouraging that without the application of surgical treatment it would be 100% in this group of patients. Conclusion: Regardless of the risk posed by surgical treatment of a bleeding ulcer, it still brings the patient the only chance for life in cases when the interventional radiological and gastroenterological approach has failed or been disabled. Surgical treatment of bleeding ulcer in cases when the gastroenterological and radiological approach is insufficient or disabled - Single center experience.

The Vehicle Routing Problem (VRP) is important in supply chain management as it optimizes goods and services delivery to customers, resulting in improved organizational productivity. This study introduces an innovative hybrid methodology integrating the Multi-Criteria Decision Making (MCDM) approach with Clarke and Wright’s savings algorithm to tackle the capacitated vehicle routing problem. In addition to the conventional aim of optimizing truck routes, this strategy considers customer satisfaction. The initial step involves clustering all customers through the utilization of Clarke and Wright’s savings algorithm, which efficiently organizes customers into groups based on their geographical closeness. Following this, the hybrid Best-Worst Method (BWM) and Ranking Alternatives For Similarity to Ideal Solution (RAFSI) method are utilized to allocate the best routes and establish customer prioritization. The major objective of this study is to reduce overall transportation expenses while ensuring compliance with vehicle capacity limitations, aiming to improve customer satisfaction. The proposed approach seeks to balance cost-efficiency and customer-centricity in vehicle routing by including customer prioritizing and Clarke and Wright’s savings algorithm. The effectiveness and practical application of the proposed methodology are demonstrated through a case in the food industry. The obtained results using the proposed methodology give a more precise platform for decision-making and highlight its relevance for enhancing supply chain performance and addressing the intricate challenges associated with the capacitated vehicle routing problem. The hybrid technique presented in this study provides a comprehensive framework for effectively tackling the intricate challenges associated with the capacitated vehicle routing problem.