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Publikacije (45381)

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Petar Tasić, Ismar Hajro

One of the most often used welding processes for unalloyed structural steels is MAG, which is relatively simple, yet achieving high deposition rates. On the other side, there are standards describing weld quality based on weld geometry. This paper describes influence of heat input on weld geometry for MAG fillet welds of unalloyed steel with thicknesses of 8 mm, in horizontal and overhead position. Independently varied parameters were welding current and speed. Influence is described through models based on linear regression analysis. Comparison is made between models developed for different positions, as well as with those available in literature.

Background: Tuberous Sclerosis Complex (TSC) is an autosomal dominant genetic disorder and involves multiple organs, intellectual disability and epilepsy. Mutations in TSC1 and TSC2 genes are responsible for the molecular disease mechanism. Objective: The aim is to determine molecular background of a patient with a suspicion of TSC. Case presentation: In this case report, we describe a seven year old patient with the clinical manifestation of TSC that includes supratentorial changes, subependymal hamartomas and angifibromas in the facial area. Besides the brain and skin changes, no other TSC characteristics were observed. The patient was referred to molecular genetic testing using Next Generation Sequencing (NGS). Results: Clinical exome sequencing revealed intronic TSC2 c.4849+2T>G variant. The variant was confirmed using Sanger sequencing on the subject. However, the variant was not detected in the parents, which indicated that it arose de-novo. The RegSNP-intron, Mutation Taster and Human Splicing Finder were used as a bioinformatic tools to predict the possible effect on protein. Using bioinformatic tools, it was determined that the variant is possibly damaging to protein. Conclusion: This data suggest that observed splicing intronic variant could be the cause of TSC in this pediatric patient.

Anđela Đošić, Danijela Živković, Tijana Purenović-Ivanović, Nebojša Ranđelović, S. Pantelić

The research assessed the level of physical activity (PA) of boys and girls aged 11-14, as well as trends in PA levels. The sample included a total of 433 children aged 11-14, comprising 238 boys and 195 girls. PA was assessed using the FELS questionnaire, which included questions about the frequency of PA in sports, PA during leisure time, PA at home, and overall PA. To determine the trend in PA levels across specific domains and overall, trend analysis was applied, followed by comparisons using the LSD Post Hoc Test. Data were processed using the SPSS statistical package (p < .05). The results showed that boys had significantly higher levels of PA across all periods compared to girls. Significant changes in PA levels among boys were observed in the domain of PA in sports (Sig. = < .001) and overall PA (Sig. = .008). A significant decline in PA in sports among boys was noted between the ages of 11 and 13, as well as between 11 and 14 years, while the decline in overall PA was observed between the ages of 11 and 13. Among girls, a decline in PA in the domain of household chores was identified between the ages of 11 and 14. In the domain of overall PA, significant decreases were observed between the ages of 11 and 13, 11 and 14, 12 and 13, and 12 and 14. It was found that PA among children aged 11-14 significantly decreases around the ages of 12 and 13. Efforts should focus on promoting PA within this population group and identifying appropriate strategies to increase or at least maintain PA levels during this critical period.

Background: The scientific researchers have the role of interacting through published articles in scientific journals or presentations at scientific and professional conferences where they can affect the practices that can make achievements to society and country. or worldwide. Objective: The aim of this article was to describe bibliometric indexes and explained its importance for its evaluation and measuring quality assessment of published papers in scientific journals and advantages and disadvantages of current bibliometric portals for creating the list of universities and its academic staff by counts of deposited articles in databases and number of its citations. Methods: The author searched the most influential online databases and analyzed deposited papers by bibliometric indexes, and used a descriptive method to review important facts about bibliometrics experiences in scientific and academic practice. The author used facts deposited on the main international portals for analyzing number of citations of deposited scientific papers on Scopus and Google Scholar platform–h–Index and i10-Index and number of citations as basic data for created top list of most citated scientists in almost of all countries in the world. Results and Discussion: Bibliometric methods are used for quantitative analysis of written materials. Citation is influenced by: article quality, understanding of the article, language in which the article is written, loyalty to a group of researchers, article type, etc. Some indicators used in evaluating scientific work are Impact factor (IF); Citation of the article; Journal citations; Number and order of authors, etc. The index factor of influence depends on the quality of the journal, the language in which it was printed, the area it covers, and the journal distribution system. The portals and its platforms: Webometrics, “AD Scientific Index” and Stanford Bibliometric List are not fully relevant for measuring quality assessment of universities and its academic staff. Conclusion: Current academies and academicians can propose criteria how improve indexing scientific papers with the consultation of scientific bodies and experts at universities in one country, selected regions, or worldwide. These criteria should be necessary for quality assessment of the scientific curriculum of scientists and their published papers in scientific journals.

M. Ganic

This study empirically explores short run and long run causality between institutional financial inclusion and income inequality in 22 members of European Union (EU) divided in two subpanels: Old EU members and New EU Member states (NMS). A panel VECM (PVECM) approach is utilized to observe the dynamic causal relationship between financial inclusions on income inequality when control the effect of economic development on inequality. The current level of financial inclusion in the old EU members only through expansion ATMs services lead to decrease income inequality in long run while it contributes through expansion commercial bank branches in short run. On the contrary, the study finds weak and subdued effect financial inclusion on income inequality in the NMS countries in long run, while only expansion commercial bank branches lead to decrease income inequality in short run. The results show that financial inclusion measured by commercial bank branches contributes to more equal income distribution for both regions, only in the short run. In fact, deepening institutional financial inclusions by increasing availability and diversify of specialized financial products and ATM services are still needed to address impediments to financial inclusion, especially in the NMS.

Tatjana Jevtić Drkić, Armin Šljivo, Kenan Ljuhar, Amna Palikuća, Arijana Knezevic, Emina Karamehić, Lamija Hukić Fetahović, Melica Imamović Bošnjak

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.

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.

Milan Pupčević, P. Gvero, Č. Zeljković, M. Kotur, Predrag Mršić, S. Tešić

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.

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