Abstract The electricity supplier, having direct contact with end consumers, has significant potential for contributing to the achievement of country’s strategic goals related to increasing the share of electricity production from renewable energy sources and promoting efficient use of electricity. This paper presents the concept of conducted analyses of energy efficiency at the customers of JP Elektroprivreda BH d.d. Sarajevo for the purpose of identifying consumers where it would be useful to apply some of the energy efficiency measures and/or peak load management, all for reducing electricity costs. The results of the analysis are presented in the paper. Special attention is given to the techno-economic analysis of the application of measures used to improve the energy efficiency. The results of the analyses show that the shortest payback period is achievable by adequate waste heat recovery in compressors and refrigeration systems, reactive power compensation, control of motor drives of pumps and fans, and the replacement of motors with a higher efficiency class.

Zbog svojih jedinstvenih i rijetkih kolekcija, Specijalne zbirke Nacionalne i univerzitetske biblioteke Bosne i Hercegovine (NUBBiH) su nezamjenjiv izvor za mnogostruke istraživačke projekte i naučne radove. Već dugi niz godina NUBBiH ulaže napor da putem svojih projekata naučnoj zajednici pobliže predstavi vrijedne kolekcije Specijalnih zbirki. Da bi se korisnicima osigurao brži i lakši pristup građi, a ujedno i zaštitili originalni dokumenti od njihovog daljeg propadanja, građa koja je obuhvaćena projektima digitalizira se i prezentira kroz Digitalne kolekcije NUBBiH. U ovom radu predstavit ćemo jedan takav projekt, a to je projekt zaštite i prezentacije Arhiva poljičkih isprava iz Zbirke Aleksandra Poljanića te ćemo prikazati dosadašnje rezultate, kao i krajnje ciljeve ovoga projekta. = The Special Collections of the National and University Library of Bosnia and Herzegovina (NULBIH) are an irreplaceable source for multiple research projects and scientific papers. For many years, NULBIH has been strengthening efforts to present values of Special Collections to the scientific community through its projects. To provide users with faster and easier access to the material, and at the same time to protect the original documents from their further deterioration, the materials covered by the projects are digitized and presented through the Digital Collections portal of the National and University Library of BIH. In this article, we will present the ongoing project “Protection and presentation of the Poljica Documents Archive from the Collection of Aleksandar Poljanić” and so far, the results and ultimate goals of this project.

Cotoneaster integerrimus represents a multiploid and facultative apomictic system of widely distributed mountain populations. We used flow cytometry to determine genome size, ploidy level, and reproduction mode variation of the Balkan populations, supplemented by analysis of nuclear microsatellites in order to address: (i) geographic distribution and variation of cytotypes among the populations; (ii) variation of reproduction mode and the frequency of sexuality; (iii) pathways of endosperm formation among the sampled polyploids and their endosperm balance requirements; (iv) genotypic diversity and geographic distribution of clonal lineages of polyploids. The prevalence of apomictic tetraploid cytotype followed by sexual diploids and extremely rare triploids was demonstrated. This prevalence of tetraploids affected the populations’ structure composed from clonal genotypes with varying proportions. The co-occurrence of diploids and tetraploids generated higher cytotype, reproductive mode, and genotypic diversity, but mixed-ploidy sites were extremely rare. The endosperm imbalance facilitates the development and the occurrence of intermediate triploids in mixed-ploidy populations, but also different tetraploid lineages elsewhere with unbalanced endosperm. All these results showed that the South European populations of C. integerrimus have higher levels of cytotype and reproductive diversity compared to the Central European ones. Therefore, the South European populations can be considered as a potential reservoir of regional and global diversity for this species.

The main goal of this paper is to determine the level of independence in performing daily activities in children and youth with cerebral palsy who are included in the regular education and rehabilitation program and to see their progress in relation to children and youth with cerebral palsy who are occasionally included or not included in the education and rehabilitation program. The research was conducted in the Center for Children with Multiple Disabilities "Koraci Nade (eng. Steps of Hope)" in Tuzla as well as in practice with the mobile team of the Centre. Total of 40 respondents were included. Respondents were divided into two groups: respondents who were included in the program and respondents who were occasionally or not at all included in the program. The results of the research indicate that the respondents who were included in the regular program of education and rehabilitation achieve better results in performing activities of everyday life in relation to the respondents who are occasionally or not at all included in the program. Key words: cerebral palsy, motor functioning, daily life activities, treatment

OBJECTIVES To test the influence of a bleaching procedure using 16% carbamide peroxide (CP) on the colour of composite materials and their consecutive subjection to discolouration in beverages. MATERIALS AND METHODS Nanocomposite Z550 (3M ESPE) and the microhybrid Z250 (3M ESPE) composite materials were selected for the research. 16% CP was applied to composite plates (15 samples each material) for seven hours a day for 14 days simulating at-home nightguard vital bleaching. The test samples were then divided randomly into three sub-groups and submerged in instant coffee, green tea and Coca Cola for 30 days. The control group (N=5) samples were kept in deionized water. Determination of the L*a*b* dimensions of colour of the polymerized discs was performed by calibrated spectrophotometer 24 hours later, after the bleaching procedure, and on days 7, 15 and 30 after immersion in the beverages. RESULTS After application of 16% CP, there were perceptible changes in the colour of both test materials, which did not exceed the boundaries of acceptability (ΔE<3.48). Coca-Cola did not cause discolouration of the tested composites, but coffee and tea changed their colour above the level of perceptibility already seven days after immersion. A statistically significant difference in the change in colour was established between the materials when they were immersed in coffee (P<0.05). CONCLUSIONS 16% CP does not affect the basic colour of the composites. Immersion in a beverage led to an unacceptable change in the colour of both test materials in coffee and tea, primarily towards black. The greatest discolouration after bleaching was shown by Z550 when immersed in coffee.

In this paper, a channel state information (CSI) feedback method is proposed based on deep transfer learning (DTL). The proposed method addresses the problem of high training cost of downlink CSI feedback network in frequency division duplexing (FDD) massive multiple-input multiple-output (MIMO) systems. In particular, we obtain the models of different wireless channel environments at low training cost by fine-tuning the pre-trained model with a relatively small number of samples. In addition, the effects of different layers on training cost and model performance are discussed. Furthermore, a model-agnostic meta-learning (MAML)-based method is proposed to solve the problem associated with large number of samples of a wireless channel environment required to train a deep neural network (DNN) as a pre-trained model. Our results show that the performance of the DTL-based method is comparable with that of the DNN trained with a large number of samples, which demonstrates the effectiveness and superiority of the proposed method. At the same time, although there is a certain performance loss compared with the DTL-based method, the MAML-based method shows good performance in terms of the normalized mean square error (NMSE).

The development of the internet of things (IoT) and smart cities, combined with the widespread usage of cooperative or independent air traffic surveillance systems such as automatic dependent surveillance-broadcast (ADS-B) bring about novel deployment paradigms in air-ground integrated vehicular net-works (AGVN). However, compared with the evolutional physical layer advancing, the communication protocols such as TCP/IP protocol, which are listed on the top of communication protocol stacks, have relatively constricted developments due to their fixed frameworks. The most obvious manifestation of this trend is that these protocols can hardly extend interfaces to maximize the benefits brought by bottom layer upgrades. In view of the above problems, in this paper, we propose a novel handover strategy based on side information of the ADS- B for AG VN. Firstly, a practical scheme of combination between TCP/IP protocol and ADS-B, which is implemented in the Network simulation, version-3 (ns-3), is proposed to adapt the AGVN handover tasks. Secondly, the configuration, timing sequence and parameters, as well as hand over strategies of the scheme are proposed in detail with the modules called by ns-3 simulator. Finally, the experimental results are provided to validate the handover strategies.

This paper proposes an unmanned aerial vehicle (UAV)-aided full-duplex non-orthogonal multiple access (FD-NOMA) method to improve spectrum efficiency. Here, UAV is utilized to partially relay uplink data and achieve channel differentiation. Successive interference cancellation algorithm is used to eliminate the interference from different directions in FD-NOMA systems. Firstly, a joint optimization problem is formulated for the uplink and downlink resource allocation of transceivers and UAV relay. The receiver determination is performed using an access-priority method. Based on the results of the receiver determination, the initial power of ground users (GUs), UAV, and base station is calculated. According to the minimum sum of the uplink transmission power, the Hungarian algorithm is utilized to pair the users. Secondly, the subchannels are assigned to the paired GUs and the UAV by a message-passing algorithm. Finally, the transmission power of the GUs and the UAV is jointly fine-tuned using the proposed access control methods. Simulation results confirm that the proposed method achieves higher performance than state-of-the-art orthogonal frequency division multiple-access method in terms of spectrum efficiency, energy efficiency, and access ratio of the ground users.

Background: The pandemic of COVID-19 has affected all spheres of life, including education. Teachers at all levels were faced with numerous challenges during the pandemic. These challenges had an impact on their mental health. Objective: The goal of the present study was to examine the depression, anxiety, and stress levels in teachers in Bosnia and Herzegovina. Methods: The sample for this study consisted of 559 teachers (471 female teachers and 88 male teachers). We used the Depression, Anxiety, and Stress Scale (DASS 21) to measure teachers’ emotional states of depression, anxiety, and stress. Results: The findings of this study clearly indicate the high levels of depression, anxiety, and stress in teachers. We also identified that levels of support provided by family members and school administration served as protective factors in the time of crisis. Conclusion: Teachers in Bosnia and Herzegovina have a high prevalence of elevated depression, anxiety, and stress levels. The article concludes with some recommendations on how to improve the mental health of teachers.

Background Over a third of critical illness survivors suffer from mental health problems following hospitalization. Memories of delusional experiences are a major risk factor. In this project, ICU doulas delivered a unique positive suggestion intervention targeting the vulnerable time period during critical illness when these memories are formed. Methods Adult critically ill patients were recruited for this single-arm, prospective pilot study. These ICU patients received a positive suggestion intervention daily during their ICU stay in parallel with their medical treatment. The intervention was designed to be delivered over a minimum of two sessions. Feasibility was defined as intervention delivery on ≥ 70% of ICU days after patient enrollment. As a secondary analysis, psychometric questionnaires were compared to those of a historic control cohort of patients receiving standard care in the ICU using adjusted linear regression models. Results Of the 97 patients who received the intervention and were alive at the end of their ICU course, 54 were excluded from analyses mostly for having received only one session because of a short ICU length of stay of < 2 days, transitioning to comfort care or not wanting to answer the study questionnaires. Forty-three patients who completed 2 or more sessions of the positive therapeutic suggestion intervention provided by two trained ICU doulas received it for a median of 4 days (IQR 3, 5), with each session lasting for a median of 20 min (IQR 14, 25). The intervention was delivered on 71% of days, meeting our pre-determined feasibility goal. Compared to historical controls ( N  = 299), patients receiving the intervention had higher severity of illness and longer length of stay. When adjusted for baseline differences, patients both with and without mechanical ventilation who received the intervention scored lower on the Hospital Anxiety and Depression Scale (HADS)—Depression subscale. The intervention was also associated with reduced HADS-Anxiety subscale among ventilated patients. Conclusions Positive therapeutic suggestion delivered by ICU doulas is feasible in the ICU setting. A randomized trial is warranted to better delineate the role that positive suggestion and ICU doulas may play in ongoing interprofessional efforts to humanize critical care medicine. The study was registered on clinicaltrials.gov (NCT03736954) on 03/14/2018 prior to the first patient enrollment https://clinicaltrials.gov/ct2/show/NCT03736954?cond=ICU+Doulas+Providing+Psychological+Support&draw=2&rank=1 .

It is very well known that science is world activity and that there is no good and bad work in the field of scientific research. Nowadays scientific productivity of the individuals, learned societies on regional or state level are measurable parameters. In most of the systems it does include the number of original scientifi papers, quality of journals measured by impact factor and scientific citation index (1-4). There are also additional measurable parameters but for the purpose of this meeting we will avoid discussion about them. New field of scientometrics using the help of impartial and ruthless machines (computers) do help very significantly in evaluation of scientific productivity anywhere in the world. Unfortunately, there are many misused conclusions and interpretation on the data offered by computers. It is clear that some vital important changes are urgently needed. Today’s conference should use rare opportunity having together experts in the field to discuss the problems visible now. This author intends to discuss facts and doubts in writing review articles and chapters in the book (5). Some important flexibility in citation, in particular self citation, should be analyzed. An illustrative examples from author’s own experience will be shown and discussed at the meeting.

12th Days of the Academy of Medical Sciences of Bosnia and Herzegovina (AMNuBiH) this year were organized together with the International Academy of Sciences and Arts in Bosnia and Herzegovina in Sarajevo on December 4, 2021. The title of the symposium was “Scientometry, Citation, Plagiarism and Predatory in Scientific Publishing”. Experiences in the scientific area covered by title of this conference were presented by some of the most influential scientists from Bosnia and Herzegovina, who are included between 2% of authors in the Stanford scientometric list, which was published in October 2021 in the journal Biology Plos. Some of the authors are former or current Editors-in-Chiefs of indexed biomedical journals in Bosnia and Herzegovina, Croatia, North Macedonia (Izet Masic, Asim Kurjak, Doncho Donev, Osman Sinanovic). Also, Sylwia Ufnalska and Izet Masic are or were members of the European Association of Science Editors (EASE) and they have great experiences about the topic of this conference. Science that analyzes scientific papers and their citation in the scientific journals – called scientometrics – day by day has become important for measuring scientific validity and quality of all kinds of publications deposited in the most important on-line scientific databases, like WoS, Scopus, Medline, PubMed Central, Embase, Hinari, etc., but also in academic platforms ResearchGate and Academia.edu. Scientometrics use the Impact and Echo factor for measuring the quality of publications in WoS journals, Scopus uses the h-Index, and the most common one used in the last 10 years is Google Scholar index. All of them have advantages and disadvantages, and also positive and negative influences in the academic praxis. One of the greatest, and sadly too common, problems which participants in the academic process encountered are plagiarism and predatory publishing. In order to prevent this severest form of academic fraud, authors must give credit to someone whose work has helped him/her by citing references correctly. This presentations of the symposium "SWEP 2021") analyzed the major components of scientometrics, the basic mechanisms of citations in medical publications and plagiarism, as an opposition to the primary goal of scientific enterprise: search for truth.