The paper presents results of detailed geological research of quartzite in the wider area of Smrčevice, southeastern of Gornji Vakuf-Uskoplje. Based on the defined boundaries of surface distribution and research results, geological reserves of about 12 million tons have been determined in the wider area of Smrcevica. The quartzite reserves that have been so far determined in this area are at a low level of geological research. The paper contains an overview of the geological characteristics of the area, qualitative and quantitative characteristics of quartzite, and the mineral raw material potential of quartzite in the Smrčevice area according to the PERC standard. The results of the conducted research indicate that the general geological and technical-exploitation factors are relatively favorable and indicate a possible profitable exploitation of the deposit. Taking into account the significant raw material potential, and the possibility of expanding the existing raw material base, this area has special importance for the perspective development of quartzite exploitation and its use in the production of ferrosilicon and silico-metals.

This paper discusses the design and analysis of a modified test bench for high-voltage direct-current (HVDC) circuit breakers which consists of a power converter based on multiple cascaded H-bridge cells, a small-sized inductor, and an auxiliary capacitor bank. It is capable of producing output voltages up to several hundred kilovolts depending on the auxiliary capacitor bank while allowing for high current controllability via the power converter which is driven by phase-shifted pulse-width-modulated (PSPWM) signals. Consequently, the test bench can generate a wide range of controllable current waveforms and high current gradients, within hardware limitations, to simulate a wide range of fault conditions. The flexibility of the proposed design is complemented by higher reliability and longer lifetime. The concept of the test bench was verified by experiments using a down-scaled model based on nine cascaded H-bridge cells with an equivalent switching frequency of 92.5 kHz.

OBJECTIVES When choosing initial therapy for epilepsy, the decision should be supported by studies that include both treatment outcome and costs. This is especially important for developing countries with restricted budgets because such circumstances are also characterized by higher epilepsy prevalence rates. The aim of this study was to compare cost-utility of zonisamide (ZNS) and levetiracetam (LEV) in patients with newly diagnosed focal-onset epilepsy in the Republic of Serbia. METHODS A 5-state, 3-month-cycle Markov model was created to compare ZNS and LEV. The model assumed that patients whose seizures were not controlled by treatment with either ZNS or LEV would be continued on carbamazepine in controlled-release form in the second cycle and would then be treated with a pregabalin add-on if still not adequately controlled. The perspective of the Serbian Republic Health Insurance Fund was chosen, and the time horizon was 15 years. Model results were obtained after Monte Carlo microsimulation of a sample with 1000 virtual patients. Both multiple one-way and probabilistic sensitivity analyses were performed. RESULTS After base-case analysis, LEV was dominated by ZNS because the net monetary benefit was positive (16 940.78 ± 22 572.26 Serbian dinars; €144.09 ± €191.99) and the incremental cost-effectiveness ratio was below the willingness-to-pay threshold of 3 Serbian gross domestic products per capita per quality-adjusted life-year gained. Multiple one-way and probabilistic sensitivity analyses confirmed the results of the base-case simulation. CONCLUSIONS ZNS has a more beneficial cost-effectiveness ratio than LEV for the treatment of newly diagnosed focal epilepsy in Serbian milieu.

In Bosnia and Herzegovina, the pluralization of society and the state began during 1990. This is the time when political parties are formed and the first multi-party parliamentary elections are held. Due to the strong influence and domination of the ethnic principle, political parties were formed in Bosnia and Herzegovina in 1990 in two basic forms: as ethnic or people's (national) parties, and as civic (multiethnic) parties. In almost all election cycles from the beginning of the pluralization of Bosnian society until today, ethnic political parties have won the elections. Ethnic political parties have appropriated a monopoly in the promotion of national interests since the 1990 election campaign, guided by the idea of protecting the national interests of “their“ peoples. The continued rule of ethnic parties without a coalition political agenda and agreement has strengthened ethnic pluralism in Bosnia and Herzegovina. Thus, instead of democratic decision-making and competition between the majority and the opposition, the representative bodies in Bosnia and Herzegovina have become an arena and a place of mutual competition and confrontation between the parties that make up the parliamentary majority. The lack of the necessary democratic consensus between the ruling ethnic political parties at the state level was compensated and compensated by the High Representative of the International Community (OHR), who, on the basis of the Bonn powers, promulgated certain laws. Hundreds of laws in Bosnia and Herzegovina have been promulgated by high representatives. This prevented blockages in the work of the Parliamentary Assembly of Bosnia and Herzegovina. In the absence of the necessary consensus of the ruling ethnic parties, it is not possible to develop or strengthen the power of parliaments as the highest representative body of the people and citizens of Bosnia and Herzegovina. Instead of parliamentary democracy, classical partitocracy is at work. The situation is similar at the entity level, and at the cantonal level in the Federation of Bosnia and Herzegovina entity. All this, along with heterogeneous and complicated decision-making procedures and processes, ultimately reflects on the adoption of laws and decisions of importance to society and the state. Complicated forms of decision-making and the existence of a famous mechanism for the protection of vital national interests are some of the obstacles to the development of the state and society. All of these are some of the essential problems, but also the controversies that follow the decision-making processes in the representative bodies in the country. This is especially true of the adoption of important and significant public policies aimed at solving socio-political problems. Only decision-making at the level of local self-government units (municipalities and cities) can serve as a positive example. In general, the local level of government has so far proved to be the most efficient level of government in Bosnia and Herzegovina. The basis for strengthening the democratic decision-making capacities of the representative bodies of the state of Bosnia and Herzegovina is contained in the application of the democratic principle on which parliamentary democracy is established and functions. Applying almost all basic and general scientific research methods, as well as the method of analysis (content) of relevant documentation as a method of data acquisition, will identify key problems and controversies of public decision-making and policy making in Bosnia and Herzegovina, in the period after the Dayton Peace Agreement. today. A conclusion will be drawn on the need to establish a parliamentary majority based on the coalition agreement and the political program of that coalition, which significantly affects the public decision-making processes and the adoption of the necessary state public policy. Bosnia and Herzegovina is required to reconstruct public decisions in the direction of strengthening state public decisions and policies and building European standards, in order to more efficiently compose them with the requirements and directives of the European Union.

A locally irregular graph is a graph in which the end vertices of every edge have distinct degrees. A locally irregular edge coloring of a graph G is any edge coloring of G such that each of the colors induces a locally irregular subgraph of G. A graph G is colorable if it allows a locally irregular edge coloring. The locally irregular chromatic index of a colorable graph G, denoted by χirr′(G), is the smallest number of colors used by a locally irregular edge coloring of G. The local irregularity conjecture claims that all graphs, except odd-length paths, odd-length cycles and a certain class of cacti are colorable by three colors. As the conjecture is valid for graphs with a large minimum degree and all non-colorable graphs are vertex disjoint cacti, we study rather sparse graphs. In this paper, we give a cactus graph B which contradicts this conjecture, i.e., χirr′(B)=4. Nevertheless, we show that the conjecture holds for unicyclic graphs and cacti with vertex disjoint cycles.

Provenance tests of forest tree species are important experiments in silviculture and tree breeding. Their results provide information about provenances' growth, adaptability, and other features. The research aimed to determine the dynamics of growth and tree shape of common beech plants per provenances in the international provenance test in Bosnia and Herzegovina to choose the best provenances considering wood production and quality. Research was conducted in the provenance test containing eight provenances from Bosnia and Herzegovina, four from Germany, three from Serbia, two each from Croatia, Romania, and Switzerland, and one from Hungary. Provenance test was established in 2007 by planting 2-year-old and 3-year old seedlings. Height and root collar diameter were measured, and tree shape was assessed in 2019. Data were processed in SPSS 26.0. Descriptive statistics, variance analysis, multiple Duncan's test for all traits, and Pearson's coefficient of corelation among morphological traits and tree shape were calculated. Variance for the height and root collar diameter showed statistically significant differences among different ages of plants and among provenances. Provenance from Croatia (Dilj Čaglinski) had the highest, and provenance from Romania (Alba-Iulia) had the lowest average height. The highest average value of root collar diameter had provenance Dilj Čaglinski, and the lowest value had provenance Sihlwald (Switzerland). The highest percentage of category 10 (ideal tree form) had provenance Bad Wildbad (Germany), and categories 1-4 (no silviculture value) had provenance Alba-Iulia (Romania). Pearson's coefficient showed that height, root collar diameter, and tree shape are highly correlated. Considering all the above, when planning forest-breeding works, it is recommended to continue the research and favor provenances with the best growth and tree shape.

Morphologic variability from 25 populations of Acer campestre L. in Bosnia and Herzegovina was analyzed. Morphometric structure of variability and between-population variability was performed based on 10 fruit-parameter characteristics and 19 leaf-parameter characteristics using multivariate statistical analysis. Results confirmed the separation of three submediterranean populations as a group in relation to other tested populations, from which the Banja Luka population is different. Measured leaf parameters were confirmed as a predominant carrier of the morphologic separation between populations. In other Acer species populations within A. monspessulanum and A. intermedium species are separated mainly by fruit and much less by leaf parameters. The southernmost submediterranean populations from Trebinje, Ljubuški, and Mostar regions have smaller leaf areas, which consequently places them within the same morphologic group; their variability is in tight connection with eco-geo-graphical factors, where the ecological distance is a much better predictor of morphological variability compared to geographical distance. The air temperature had the biggest influence on morphological variability regarding the highest in-between correlation. Achieved results may serve for the continuation of the research in other areas of Acer campestre to determine the interactive effect of ecological, geographical, climatic, and migrational factors on their morphologic population plasticity.

Using extensive and comprehensive databases to select a subset of research papers, we aim to critically analyze previous empirical studies to identify certain patterns in determining the optimal number of stocks in well-diversified portfolios in different markets, and to compare how the optimal number of stocks has changed over different periods and how it has been affected by market turmoil such as the Global Financial Crisis (GFC) and the current COVID-19 pandemic. The main methods used are bibliometric analysis and systematic literature review. Evaluating the number of assets which lead to optimal diversification is not an easy task as it is impacted by a huge number of different factors: the way systematic risk is measured, the investment universe (size, asset classes and features of the asset classes), the investor’s characteristics, the change over time of the asset features, the model adopted to measure diversification (i.e., equally weighted versus optimal allocation), the frequency of the data that is being used, together with the time horizon, conditions in the market that the study refers to, etc. Our paper provides additional support for the fact that (1) a generalized optimal number of stocks that constitute a well-diversified portfolio does not exist for whichever market, period or investor. Recent studies further suggest that (2) the size of a well-diversified portfolio is larger today than in the past, (3) this number is lower in emerging markets compared to developed financial markets, (4) the higher the stock correlations with the market, the lower the number of stocks required for a well-diversified portfolio for individual investors, and (5) machine learning methods could potentially improve the investment decision process. Our results could be helpful to private and institutional investors in constructing and managing their portfolios and provide a framework for future research.

Abstract Nanosized hematite (α-Fe2O3) is a widely investigated material due to its favourable properties (chemically stable, environmentally safe, inexpensive) and very good performance in several advanced applications. Properties and performance of hematite nanoparticles can be adjusted and improved by modification of particle size and shape, as well as by substitution of Fe3+ ions in the crystal structure of hematite with other metal ions. Ru3+ ions are potentially suitable metal ions for the substitution of Fe3+ ions in hematite because of the same charge and similar ionic radii. In the present work, the effects of Ru3+ ions on the formation and properties of hematite nanorods prepared by combination of hydrothermal precipitation and calcination were investigated. The influence of the molar fraction of Ru3+ ions in the hydrothermal precipitation system on the formation and properties of iron oxide phases was studied. Single-phase goethite (α-FeOOH) nanorods containing incorporated Ru3+ ions were formed in the presence of low levels of Ru3+ ions (

Abstract Forest policy and forest ownership patterns in Slovenia and the Federation of Bosnia and Herzegovina (FBiH) have changed considerably in recent decades due to unprecedented scale of social, political and economic change. The distribution of ownership types varies between the countries – in Slovenia private forest ownership predominates (77%), while in FBiH only about 20% of forest is private-owned. In both countries, private forest properties are small-scale and fragmented, which affects management opportunities and the scale at which policy interventions need to be made. This paper analyses the Slovenian and Central Bosnia Cantonal Law on Forests to assess how the regulatory framework affects private forest owners’ (PFOs) rights, forest management and accelerates cooperation of PFOs. Both laws impose exclusive rights and responsibilities of PFOs, as well as limitation on how they can use their forests. In both countries, legislation contains detailed regulations for forest management activities and stipulate that mandatory forest management plans (FMPs) are an important tool that supports the implementation of sustainable forest management. In Slovenia, FMPs are prepared as common plans for all forests regardless the ownership, while in FBiH the Cantonal Law prescribes a separate forest management planning system for private forests. To improve the efficiency of private forest management, both laws support voluntary cooperation of PFOs. From the analysis, it can be concluded that there is a need for better harmonisation of public and private interests in relation to forest resources, especially in the case of FBiH, and that the deregulation of property right is needed as well as that the level of involvement of PFOs in the forest policy making process is unsatisfactory, in most cases only formal.