Logo

Publikacije (45393)

Nazad
Enver Selimović, Hanka Hadžić, Goran Simonović, S. Churilov, M. Hrasnica, S. Medić

Determination of dynamic properties of structures is the first step in assessing seismic response, and they can be measured in several ways. Controlling or knowing the input excitation usually applied by impact hammer or vibration shaker, typical for experimental modal analysis (EMA) that has been around for the past few decades, is for majority of structures difficult or practically impossible. Ambient vibration testing (AVT) or operational modal analysis (OMA), on the other hand, is the output-only modal analysis. It does not require knowledge of the input excitation, which is practically induced by wind, traffic or similar random source. In this paper, an investigation of ambient vibrations and numerical modelling of the building of the Institute for Materials and Structures (IMK) of the Faculty of Civil Engineering in Sarajevo was carried out. The main goal was to determine the dynamic characteristics of the IMK building using the DIGITEX SENTRY system and Artemis modal software. In addition to testing the IMK building, testing of simpler systems such as a wooden simple beam and a steel cantilever was also conducted. For each experiment, a modal analysis was performed in the Tower 8 software package. The numerical model of the building was more flexible than measured in the experiments, and the results were only comparable after inclusion of partition walls in the analysis.

Alma Jusufbašić, Željko Stević

: Quality is a key success factor in the market. For the successful performance of a company, it is very important to have high quality and a quality system, and strive for its development and improvement. In this paper, it has been measured the quality of logistics service using the SERVQUAL model in the TC company as one of the most well-known and most used models in the field of quality measurement. The users of the transport service, the respondents, provided certain information on their expectations, as well as their perceptions of the quality of the transport service from the aspect of all five dimensions: reliability, assurance, empathy, tangibles and responsiveness. The SERVQUAL model was chosen to obtain the final results of the quality of service provided to users. The FUCOM method was applied to obtain the final weights of dimensions. The main goal of this paper is to assess the quality of the transport service in the TC company, so that the company has an insight into its current state

Z. Liber, I. Radosavljević, Z. Šatović, Marija Hodja, V. Židovec, F. Bogunić, D. Ballian, D. Stešević et al.

Due to climate extremes and limited natural resources, especially water, we can expect increased demand in the future for species that can better tolerate climate extremes such as drought. One potentially valuable horticultural species is the endemic species of the Dinaride Mountains Micromeria croatica (Pers.) Schott (family Lamiaceae). It grows in the crevices of carbonate rocks, extending from an altitude of 150 m to more than 2000 m. This study aims to provide additional insight into the genetic and morphological diversity of this endemic species, focusing on valuable horticultural traits. To achieve this goal, morphological and molecular analyses were performed on ten natural populations. Through STRUCTURE and PCoA analyses, ten M. croatica populations were placed into western and eastern genetic groups, with several individuals from western populations assigned to the eastern group and vice versa. These atypical individuals assigned to the new genetic group by BAPS analysis indicate gene flow between western and eastern populations. Similarly, an analysis of molecular variance revealed fewer genetic differences than within studied populations. Both PCA and CANDISC analysis based on eleven morphological traits largely confirmed the existence of two slightly different genetic groups. Two populations containing plants with the most flowers per shoot, one with white-flowered individuals, one with the roundest leaves, and one with the narrowest leaves proved to be the most horticulturally valuable. The genetic and morphological variability found should be a sufficient basis for the potential selection of M. croatica populations and individuals for horticultural purposes.

G. Zlatić, Ivana Martinović, Z. Pilić, Andrea Paut, Ivana Mitar, A. Prkić, Dušan Čulum

Plant extracts are increasingly being examined in the corrosion inhibition of metal and alloys in various environments due to their potent antioxidant properties. The use of Artemisia annua L. aqueous extract (AAE) as an aluminium alloy 5083 (ALA) corrosion inhibitor in artificial seawater (ASW) was investigated using electrochemical tests and spectroscopy tools, while the active biocompounds found in AAE were analyzed using high-performance liquid chromatography (HPLC). Electrochemical results showed that AAE acts as an anodic inhibitor through the physisorption (ΔG ≈ –16.33 kJ mol−1) of extract molecules on the ALA surface, thus reducing the active sites for the dissolution of the alloy in ASW. Fourier-transform infrared spectra confirmed that phenolic acids found in AAE formed the surface layer that protects ALA against the corrosive marine environment, while HPLC analysis confirmed that the main phytoconstituents of AAE were chlorogenic acid and caffeic acid. The inhibition action of phenolic acids and their derivatives found in the AAE was based on the physisorption of caffeic acid on the ALA surface, which improved physicochemical properties of the barrier film and/or conversion of Al3+ to elemental aluminium by phenolic acids as reducens, which slowed down the diffusion rate of Al3+ to or from the ALA surfaces. The protective effect of the surface layer formed in the presence of AAE against ASW was also confirmed by inductively coupled plasma–optical emission spectrometry (ICP-OES) whereby the measured concentration of Al ions after 1 h of immersion of ALA in the pure ASW was 15.30 μg L−1 cm−2, while after the addition of 1 g L−1 AAE, the concentration was 3.09 μg L−1 cm−2.

Anita Lukenda, Ana-Marija Iveljić

Cilj rada usmjeren je pregledu i analizi kritika upućenih konceptu cjeloživotnog obrazovanja razvijenog u okrilju UNESCO-a, a odnosi se na njegovu prvu razvojnu fazu tijekom 1970-ih godina. Radom na dokumentaciji izdvojene su kritike koje su se prvenstveno odnosile na teorijska promišljanja o konceptu i iz kojeg do izražaja dolaze obilježja kao što su (ne)jasna definicija cjeloživotnog obrazovanja, uključivanje neintencionalnih oblika učenja, uloga nastavnika u ostvarivanju koncepta i sl. Pregled kritika koncepta temelji se ponajprije na stajalištima predstavnika radikalne kritike, potom i na kritikama pripadnika analitičke filozofije odgoja i obrazovanja. Posljedično se iznose odgovori na iskazane kritike, a koje su dali zagovornici koncepta cjeloživotnog obrazovanja. U svrhu postizanja što objektivnijeg pregleda i analize kritika izdvojene su i kritike koncepta cjeloživotnog obrazovanja autora, koji su ujedno bili i njegovi zagovornici. Radikalna stajališta o ostvarenju cjeloživotnog obrazovanja unutar okvira sustava, kao i tvrdnje predstavnika filozofije odgoja i obrazovanja o proizvoljnom definiranju i shvaćanju koncepta, potaknula su daljnja propitivanja o razradi koncepta kako bi se u odgojno-obrazovnom diskursu postigla što viša razina suglasnosti i zajedničko razumijevanje ciljeva, a posljedično i smjer djelovanja u svrhu njegove implementacije. To nije moguće bez uvažavanja postojećih obilježja nacionalnih sustava odgoja i obrazovanja kojima bi krajnji cilj trebao biti stvaranje pretpostavki za odgovaranje na obrazovne potrebe svakog pojedinca, što je zapravo odraz humanističkog podrijetla koncepta.

Enida Karić, E. Horozić, S. Pilipović, Esmeralda Dautović, M. Ibišević, Amra Džambić, Semir Čeliković, Arnela Halilčević

Extracts obtained from plant material have widely applied in the chemical and pharmaceutical industries because they contain significant concentrations of biologically active substances. Commercial daisy extract (Bellis perennis) was used in this paper for in vitro testing of tyrosinase enzyme inhibition, and antioxidant and antimicrobial activity. Inhibition of the tyrosinase enzyme was determined by monitoring dopachrome formation at a wavelength of 492 nm. Antioxidant activity was tested using FRAP and DPPH methods, while antibacterial activity was tested by diffusion technique on reference strains from the ATCC collection. The results showed that daisy extract inhibits tyrosinase enzyme in a dose-dependent manner. The extract effectively neutralized DPPH radicals and also showed good reducing ability. Bacterial strains used for in vitro antimicrobial activity testing did not show sensitivity to the extract concentrations used in this study.

Nermina Terzo, Amer Ovčina, Amela Salihović, Jasmina Mahmutović, Enisa Šljivo, S. Branković, E. Eminović

Introduction: The health system is one of the most complex systems in any country. According to the definition of the World Health Organization, the health caresystem includes health infrastructure that provides a spectrum of programs and services and provides health care to individuals, families and the community. A basichuman right is the right to health care, which includes health activities such as preventive, curative and palliative treatment. The organization of palliative medicineis necessary at all levels of health care.Aims: Situational analysis of the organization of palliative care in the Clinical Center of the University of Sarajevo. Examining the knowledge and approach of healthcareworkers in the process of providing palliative care at the Clinical Center of the University of Sarajevo. To examine the attitude of healthcare workers towards theAwareness and attitudes of nurses of the Clinical center of the University ofSarajevo (ccus) towards the organization of palliative care way palliative care is organized in the Clinical Center of the University of Sarajevo.Material and methods: 141 subjects employed at the Clinical Center of the University of Sarajevo (CCUS) participated in the research. The research is descriptiveand analytical. The results are presented in tables and graphs, chi-square and Fisher’s exact test were used for testing the significance of differences.Results: It was found that there are different knowledge, attitudes and approaches of the respondents regarding the way palliative care is organized, the provision ofservices and treatment in the hospital. The majority of respondents (64%) believe that palliative care should be organized in institutions for palliative care that meetthe conditions of the prescribed standards and criteria for palliative care.Conclusion: Significant differences were found in the knowledge, practice and attitudes of health workers about palliative care.

Amer Ovčina, Enisa Šljivo, Hadžan Konjo, Vedran Đido, Marijan Marjanović, Emilija Hrapović, E. Eminović, S. Begić

Introduction: Conflicts are a social phenomenon and occur in all organizations where people work. So, they are inevitable even among nurses, because the work they do is very responsible and stressful. Conflicts of a personal nature are not uncommon, and they are produced by intimacy in the workplace.Methodology: The study was conducted among 146 nurses employed at the Clinical Center of the University of Sarajevo. The study is descriptive, analytical andcomparative. The original author’s questionnaire created on the basis of professional and scientific literature was used as a study instrument. The goal of thestudyisto determine if the conflict situations in nursing clinical practice are related to the dissatisfaction of nurses with working conditions, lack of motivational techniques, poor communication in the team and superior-subordinate relations.Results: Most respondents state that conflict situations are short-lived and do not affect work. Respondents pointed out that the most commoncauses of conflict are poorcommunicationand personal contempt of colleagues (71 or 48.6%), violations of labor regulations and non-performance of work obligations (68 or 46.6%), differences in education (39 or 26.7%), etc. The most common manner that nurses use to resolve conflicts is to exchange information in order to reach a joint decision, to negotiate and seek compromises.Conclusions: Conflicts are manifested in the form of negative emotions, so in this regard, they can have significant negative consequences, and contribute less toimprovement or have a positive effect on the work environment. Communication conflicts between nurses are detrimental to teamwork - negative confrontation between two sides, often revealing anger, not talking for a longer period, or personally standing out at the expense of the other side.

Introduction: The basic postulate of the lean concept is that greater efficiency of the work process can be achieved through a process of continuous improvement,which aims to eliminate waste and maximize activities that add value.The Netherlands, Great Britain, Italy and the United States were examples of healthcare systems that implemented the lean concept.Aim: To examine the opinion of health workers of a public hospital in the Sarajevo area about the possibilities of improving business processes by implementing thelean concept.Method: The cross-sectional study was conducted using a questionnaire. The questionnaire was sent to the e-mail addresses of health workers of public health organizations. 91 respondents of both sexes (doctors ofmedicine, residents, registered nurses, nurses and administrative staff) were included.Results: A positive correlation was establishedin the attitude toward the effectiveness and efficiency of business processes. According to the participant’s opinion, the greater effectiveness of business processes contributes to greater efficiency (r=0.846; p<0,05). Spearman’s coefficient rs=0.81 shows a strong connection between the effectiveness and efficiency of business processes.Conclusion: The study showed that there is a positive attitude towards the impact of the lean concept on improving the efficiency of business processes. The reducexpected positive effects of the implementation of the lean concept are manifested through faster provision of services to patients, reduction of service waiting times and general improvement of business processes.

In this paper, we observed the ordinary differential equation (ODE) system and determined the equilibrium points. To characterize them, we used the existing theory developed to visualize the behavior of the system. We describe the bifurcation that appears, which is characteristic of higher-dimensional systems, that is when a fixed point loses its stability without colliding with other points. Although it is difficult to determine the whole series of bifurcations that lead to chaos, we can say that it is a common opinion that it is precisely the Hopf bifurcation that leads to chaos when it comes to situations that occur in applications. Here, subcritical and supercritical bifurcation occurs, and we can say that subcritical bifurcation represents a much more dramatic situation and is potentially more dangerous than supercritical bifurcation, technically speaking. Namely, bifurcations or trajectories jump to a distant attractor, which can be a fixed point, limit cycle, infinity, or in spaces with three or more dimensions, a foreign attractor.

Aim: This paper presents a qualitative study of the experiences of parents raising children with autism, as reflected in the media. The study aimed to explore the lived experiences of parents of children with autism and the challenges they face in Bosnia and Herzegovina. Methods: A content analysis of 20 media articles featuring parents of autistic children was conducted. The articles were selected from a range of sources, including newspapers, magazines, and online news portals. Results: We identified four major themes: supports, education, spousal relationships, and future. It should be noted that these themes are often intertwined. Conclusion: The findings highlight the importance of providing support and resources to parents of children with autism, as well as the need for greater awareness and understanding of the challenges they face. The implications of these findings for policy and practice are discussed, and suggestions for future research are presented.

Andrej A. Gajić, E. Karalić, H. Beširović, J. Sulikowski

This paper describes the first record of the critically endangered gravid female Spiny butterfly ray, Gymnura altavela (Linnaeus, 1758), in the northern Mediterranean and simultaneously the only record of the species in this century for the Adriatic Sea. The female (173 cm disc width and 43.25 kg total weight) was captured at approximately 200 m, off Vlorë in the southern Adriatic Sea off Albania on 12th of May 2022. Upon necropsy, seven near-term fetuses (mean 328 ± 6.47 mm disc width and mean 355 ± 20.06 g in total weight) were transported for further in-vitro incubation. These results represent the deepest capture for the species, as well as the largest litter size and largest size at birth in the Mediterranean Sea which indicates the need for further research.

S. Biswas, Aparajita Sanyal, Darko Božanić, Adis Puška, Dragan Marinković

The present age is moving through Industry 4.0 with massive technological developments. Supply chains have become digital, keeping sync with consumer demands and preferences. The recent pandemic has reinforced the need of embracing digital technologies in managing supply chains effectively. Therefore, it is necessary that supply chains adopt 5G mobile technologies. In this regard, the present study aims to discern the critical issues for the successful adaptation of 5G technologies for supply chain management (SCM) in developing countries such as India. The success factors for the adaptation of 5G in Indian supply chains are derived from the discussions made in the related past work regarding the challenges of implementing 5G technology. Then, the listed factors are finalised through initial rounds of face-to-face discussions with a focus group of five experts. Then, a q-rung-orthopair-fuzzy (qROFS)-based rating scale is used to rate the success factors. A new qROF-weighted-neutrality-average (q-ROFWNA)-based full-consistency method (FUCOM) approach for multicriteria decision-making (MCDM) problems involving group decision making is utilised to find out the critical success factors. Based on the comparative analysis of 17 success factors (grouped into four main factors), the spectrum availability, awareness of technology and usage, the development of supporting technologies and smart cities, and skill development are found to be the top five critical factors for the successful adaptation and implementation of 5G technologies in SCM. We further carry out a sensitivity analysis and validation test and observe that our model provides a reliable and stable solution.

Nema pronađenih rezultata, molimo da izmjenite uslove pretrage i pokušate ponovo!

Pretplatite se na novosti o BH Akademskom Imeniku

Ova stranica koristi kolačiće da bi vam pružila najbolje iskustvo

Saznaj više