When exploring the relationship between users and information systems, it is necessary to ascertain what impact the user's basic features have on their experience of the information systems they use in their work. Accordingly, this survey was conducted in the Government of Brcko within the district of Bosnia and Herzegovina, and within the Public company Brcko Municipality. The survey was conducted on 479 employees, while 261 employees completed the questionnaire developed for this research. When measuring the basic characteristics of the respondent’s gender was considered, as well as the work place, age, qualifications, their work experience and the amount of use of the information system weekly. When measuring the experience of using the information system, a modified model of performance of the information system was used. The SPSS 20.0 statistical software tool was applied during the testing of the proposed hypothesis, and the multivariate variance analysis (MANOVA) and the variance analysis (ANOVA) were used for the analysis. A factor analysis was used with the grouping of the proposed claims. The results obtained using this analysis show that in the modified model of success of the information system the statements were grouped into 4 factors. The hypothesis test results have shown that there is a significant statistical dependence on the use of information systems in almost all features of a user, except for the age of users where there is no statistical dependence. The results obtained from this research will contribute to a better understanding of how users experience information systems in their work and what basic features of the respondents affect the use of the system.

Design of Experiments (DOE) is statistical tool deployed in various types of system, process and product design, development and optimization. It is multipurpose tool that can be used in various situations such as design for comparisons, variable screening, transfer function identification, optimization and robust design. This paper explores historical aspects of DOE and provides state of the art of its application, guides researchers how to conceptualize, plan and conduct experiments, and how to analyze and interpret data including examples. Also this paper reveals that in past 20 years application of DOE have been growing rapidly in manufacturing as well as non-manufacturing industries. It was most popular tool in scientific areas of medicine, engineering, biochemistry, physics, computer science and counts about 50% of its applications compared to all other scientific areas.

The study aims to examine the euroization phenomenon in seven Western Balkan countries (Albania, Bosnia and Herzegovina, Bulgaria, Croatia, Romania, Serbia and Macedonia) between 2000 and 2015 and a number of –specific challenges faced by the region. More precisely, the paper analyzes the impact of the latest global financial crisis on the extent of currency substitution persistency by exploring the trends before, in wake of the financial crisis, and after the financial crisis. The study employed several indicators as a proxy variable for measuring of the overall level of currency substitution or euroization and cross country analysis in selected countries (liability euroization,credit euroization and deposit euroization and asset substitution- overall euroization index). Finally, the study found that deposit euroisation, credit euroization, and liabilities euroization in seven Western Balkan countries is still high with relatively high degree of heterogeneity. In some countries of the Western Balkan region the process of euroisation was further intensified in spite of the consequences of the latest global financial crises, while in the other ones the crisis years were marked by the trend of de-euroisation. In overall, this study does not find any significant evidence on significantly increases or decreases in currency substitution at the region sub-samples. Finally,Student t-test results indicate that there is no significant difference in means of before, in wake and after the financial crises at level of Western Balkan region.

Over the past several decades, the relationship between tourism and economic growth, for both developing and developed countries, has been a popular issue of debate. Taking into account the fact that the tourism is an important sector in the world economy, the knowledge of the sign and size of the impact of tourism earnings on economic growth is of particular importance to policy makers. This paper aims to explore the impact of tourism earnings on economic growth. Panel data of 113 countries are used for the years that span from 1995 to 2015. The potential contribution of tourism to economic growth is analyzed within the conventional augmented Solow growth model. GMM method is employed to account for a dynamic phenomenon of economic growth. The obtained results indicate a significant positive impact of tourism on economic growth. Furthermore, the obtained results indicate that tourism-economic growth nexus differs among income disparity. The obtained findings imply that low-income countries should enhance their economic growth by strengthening their tourism industry.

The Hedgehog (Hh) signaling pathway was first identified in the common fruit fly. It is a highly conserved evolutionary pathway of signal transmission from the cell membrane to the nucleus. The Hh signaling pathway plays an important role in the embryonic development. It exerts its biological effects through a signaling cascade that culminates in a change of balance between activator and repressor forms of glioma-associated oncogene (Gli) transcription factors. The components of the Hh signaling pathway involved in the signaling transfer to the Gli transcription factors include Hedgehog ligands (Sonic Hh [SHh], Indian Hh [IHh], and Desert Hh [DHh]), Patched receptor (Ptch1, Ptch2), Smoothened receptor (Smo), Suppressor of fused homolog (Sufu), kinesin protein Kif7, protein kinase A (PKA), and cyclic adenosine monophosphate (cAMP). The activator form of Gli travels to the nucleus and stimulates the transcription of the target genes by binding to their promoters. The main target genes of the Hh signaling pathway are PTCH1, PTCH2, and GLI1. Deregulation of the Hh signaling pathway is associated with developmental anomalies and cancer, including Gorlin syndrome, and sporadic cancers, such as basal cell carcinoma, medulloblastoma, pancreatic, breast, colon, ovarian, and small-cell lung carcinomas. The aberrant activation of the Hh signaling pathway is caused by mutations in the related genes (ligand-independent signaling) or by the excessive expression of the Hh signaling molecules (ligand-dependent signaling - autocrine or paracrine). Several Hh signaling pathway inhibitors, such as vismodegib and sonidegib, have been developed for cancer treatment. These drugs are regarded as promising cancer therapies, especially for patients with refractory/advanced cancers.

Measuring competitiveness has become one of the key factors for ensuring successful and sustainable tourism development, especially destination's current level of development and its growth and vitality. The main goal of this study was to analyze the applicability of the Ritchie and Crouch competitiveness model in order to assess tourism advantages and disadvantages of Vojvodina Province (Northern Serbia) as a rural tourism destination. Exactly 216 tourism stakeholders on the supply side that have the knowledge and/or experience relevant to this topic were interviewed. The results show that stakeholders believe that Vojvodina is not a competitive rural tourism destination, but some destination's advantages were identified, and they can be used for improving Vojvodina's position on rural tourism market. The research has shown that the key resources and the attractions of rural areas of Vojvodina are rated better than the macro and industry-related factors. In order that Vojvodina stands out in the competitive market, destination marketing is crucial and should be more closely focused on new products and market development. .

The objectives of this study were to develop and validate the mathematical model (kinetic and reactor model) of composting process, as well to used validated model in order investigate the effects of the air flow rate on organic matter conversion, carbon dioxide concentration and mixture temperature. The mathematical model incorporated two microbial populations that metabolized composting material which was split into two different fractions according to its degradability (easily-degradable and hardly-degradable). Comparisons of simulation and experimental results for five dynamic state variables demonstrated that the model has very good predictions of the composting process. Simulations with validated model showed that among three dynamic state variables (organic matter conversion, carbon dioxide concentration, mixture temperature), carbon dioxide concentration is the most sensitive while organic matter conversion is the least sensitive to the change of air flow rate.

The aim of this study was to determine the composting kinetics for mixture of poultry manure and wheat straw based on the volatile solids content. Experimental data was fitted with the first-order and the nth-order kinetic model. The nth-order kinetic model showed better prediction performance than the firstorder kinetic model. For the first-order kinetic model, maximum and mean differences between experimental and simulation results for the content of volatile solids were 5.43% and 3.00%, for the first reactor, and 4.68% and 2.12% for the second reactor, respectively, for the nth-order kinetic model, maximum and mean differences were 4.92% and 1.68%, for the first reactor, and 4.09% and 1.42% for the second reactor, respectively.

Synchronisation block which is used as a part of photovoltaic (PV) inverters control structure has a key impact on connecting inverters with grid. One of the most important parameters in the point of connection PV inverter and grid is phase angle between grid voltage and inverter current. This angle determines the energy transfer between inverter and grid. Synchronisation alorithms have developed for very long time. At first, they were based on zero crossing grid voltage detection, while today complexed synchronisation algorithms implemented on high performance digital board have been used. One of these synchronisation structures  iz Phase Locked Loop – PLL. In this paper implementation of improved PLL structure is presented. This improved structure is special while it has posibillity of grid parameters estimation even if grid voltage has noise or DC offset. This DC offset from the grid in PLL structure usually entered via measurement and A/D conversion processor or may be generated due to temporary system faults. Appearance of DC offset in measured grid voltage on the one hand prevents any estimation process of grid parameters and on the other hand also degrades reference sine signal at the output of PLL structure in PV inverters. This improved structure is designed in digital form and implemented on FPGA digital board and experimental results of this implementation are presented. Obtained experimental results show that the proposed PLL structure successfully solves important issue such is presence of DC offset in measured grid voltage.

Background and Purpose: Dryocosmus kuriphilus is an invasive insect species of sweet chestnut (Castanea spp.) originating from China, and the only effective control measure against this pest is classical biological control with introduced parasitoid Torymus sinensis. This parasitoid has been widely released in many European countries, but it also has the ability to rapidly spread naturally. No official releases have been done in Bosnia and Herzegovina. Material and Methods: D. kuriphilus galls were collected in July 2017 on 6 localities in forest district Unsko (Una Sana canton) in Bosnia and Herzegovina. Presence and parasitism rates of T. sinensis were recorded in the entomological laboratory, Croatian Forest Research Institute. T. sinensis larvae were identified morphologically and by being compared with the voucher specimens. Results and Discussion: Torymus sinensis larvae were positively identified in the examined D. kuriphilus galls from all localities in Bosnia and Herzegovina. Parasitism rates ranged from 44.83 to 74%. Occurrence and high parasitism rates in Bosnia and Herzegovina observed in this study are not results of biocontrol releases of T. sinensis, but can be attributed to natural spread from Croatia. High parasitism rates observed in this study can indicate that the parasitoid was present in Bosnia and Herzegovina in 2016. Conclusions: This study presents the first record of Torymus sinensis in Bosnia and Herzegovina. We predict that the parasitoid will continue its spread over Bosnia and Herzegovina in sweet chestnut forests and orchards and that it will act as effective biological control agent against D. kuriphilus.

Despite the economic importance of spider mites (Acari: Tetranychidae), data on their biodiversity are scarce in some regions of Europe, such as Balkan Peninsula and particularly in Serbia. In this country, according to the Spider Mites Web database, only 17 spider mite species belonging to seven genera have been reported. This study provides a review of the Serbian literature dealing with spider mites species recorded in Serbia and presents results of a four-year faunistic survey in which spider mites were collected on cultivated plants and native vegetation throughout the country. In the survey, a total of 23 species were recorded, including six species new to Serbian acarofauna: Bryobia praetiosa, Eotetranychus aceri, E. fraxini, E. pruni, Panonychus citri and Tetranychus evansi. Together with previously reported data, it raises the number of known spider mite species in Serbia to 36. A total of 90 host plant species from 21 families that are favorable to spider mites were recorded in this study; there were 62 new host records for 20 spider mite species with 11 records of new plant species as hosts of spider mites. There were 63 new records for Serbia among host plant species, raising the number of Serbian hosts for tetranychid mites to 137. The spider mite species new to Serbian acarofauna were found on 17 newly recorded host plants from 11 families. A key to all known spider mites species from Serbia is provided.