The hexacyclic system graph Fn is the graph derived from a linear hexagonal chain Ln with n > 1 hexagons by identifying two pairs of ends of Ln. The M¨obious hexacyclic system graph Mn is the graph derived from a linear hexagonal chain Ln with n > 1 hexagons by identifying two pairs of ends of Ln with a twist. In this paper, we compute, in a closed form, the resolvent energy, the Laplacian and the signless Laplacian resolvent energy, as well as the resolvent Estrada index and the resolvent signless Estrada index of Fn and Mn. All five indices are expressed as a rational function in the number n of hexagons, defined in terms of Chebyshev polynomials of the first and the second kind. Those expressions allow for a fast numerical computation of indices and for deducing sharp bounds on their growth.

Background: Normal sleep duration is crucial for maintaining brain homeostasis. Sleep disorders in Parkinson's disease are numerous, multifactorial, and result in significant morbidity. Objective: The aim of the study was to investigate the association between gender and the duration of therapy on sleep quality in patients with Parkinson's disease. Methods: The study is prospective, and includes 40 consecutively hospitalized patients with verified Parkinson's disease. The study included subjects of both genders and all age groups. To analyze the data on the subjects, we used: medical histories, nursing documentation of patients, a questionnaire with sociodemographic data, and the Parkinson's Disease Sleep Assessment Scale. We divided all subjects into two groups: subjects who have been using therapy for up to 5 years and those who have been using therapy for more than 5 years. Results: Among subjects who have been taking medication for less than 5 years, 33.3% were female and 66.6% were male. Of the total number of respondents who have been taking therapy for more than 5 years, 36.3% are female and 63.6% are male. The duration of the therapy has a statistically significant effect on the quality of sleep in patients with Parkinson's disease (p < 0.05). The subject's gender does not have a significant independent influence on the quality of sleep in patients with Parkinson's disease (p > 0.05). The interaction of gender and length of therapy use has no significant separate effect on the quality of sleep in Parkinson's disease patients (p > 0.05). The quality of sleep is better in male and female subjects who take the therapy until the age of 5. Conclusion: The duration of therapy use has a significant impact on the quality of sleep in Parkinson's disease patients. The gender of the subject has no significant independent influence on the quality of sleep in patients with Parkinson's disease.

This paper investigates the impact of different accounting bases and financial reporting frameworks on the Corruption Perceptions Index (CPI) in the public sector. Specifically, it examines how various accounting approaches (cash, modified cash, accrual, and modified accrual) and reporting frameworks (national accounting standards, International Public Sector Accounting Standards-IPSAS with or without modifications, and other frameworks) influence the perception of corruption in public institutions. The study uses a sample of 147 countries, with the CPI as the dependent variable and accounting basis and financial reporting framework as independent variables. The results of the ANOVA analysis reveal a statistically significant difference in corruption perception indices among countries employing different accounting bases. The results of this study indicate that countries applying simpler accounting frameworks, such as national standards and IPSAS modified for the local context, show a lower perception of corruption, as evidenced by a higher CPI value. In contrast, more complex frameworks, including IPSAS or national standards referencing IPSAS, combined with cash and partial accrual bases, do not significantly reduce corruption perception. Additionally, countries using national standards based on IFRS exhibit the lowest levels of perceived corruption in the public sector.

The paper aims to explore the impact of state audits of grants in the public sector on reducing non-compliance with legal regulations. The research was conducted over a ten-year period among federal and cantonal ministries in the Federation of Bosnia and Herzegovina (FBiH) responsible for planning and distributing grant funds as part of their regular duties. The research results show that the total number of recommendations given during the observed 10-year period was 1,666, including: 245 recommendations related to grant planning, 684 recommendations related to the distribution of grant funds, 554 recommendations concerning the oversight of the designated expenditure of allocated funds, 74 recommendations concerning grant implementation reporting, and 109 recommendations regarding the accuracy of accounting records. During the observed ten-year period, the number of recommendations decreased by 75%. The research results also indicate that the adoption of stricter guidelines for grant management has a strong impact on reducing the number of identified irregularities. The paper also presents an analysis of the most common causes of irregularities. The results of the conducted research will contribute to filling the literature gap on the importance of grant audits, the most common causes of identified irregularities, and the significance of stricter legal regulations and clearer rules related to grant management.

Soybean yield potential is strongly impacted by environmental conditions. Soybean yield variability could be explained by climatic variables. Choice of tolerant varieties adapted to different limited environmental conditions could be used as adaptive strategies to sustain the development of soybean areas. Three soybean varieties with high seed and oil content (Balkan, Novosađanka and Vojvođanka) were analyzed in three localities of Vojvodina Province in Serbia: Novi Sad (45°20′00″ S; 19°51′00″), Pančevo (44°52′15″ S; 20°38′51″) and Laćarak (44°59′45″ S; 19°34′03″). The highest yield of the three examined soybean varieties was shown by Vojvođanka (3365.0 kg ha-1), whereas the statistically highest yield was in 2010 (4301.1 kg ha-1) in the investigated period (2006-2011). All three varieties gave the lowest seed yield at the Pančevo locality, due to the deficit of precipitation and lower content of humus in the soil. The oil content in the seeds was also influenced by all three examined factors. The soybean varieties Vojvođanka and Balkan had statistically higher oil content than Novosađanka. The agroecological and soil conditions of Novi Sad were the most suitable for the synthesis of oil in the seeds of all genotypes. Oil content was statistically highest in 2010 (22.31%) compared to all tested years. The analysis has shown that Vojvođanka was the most promising of all soybean’s varieties.

Arsenic concentration in seafood could potentially reach very high levels and represent a significant health risk for humans. In this study, the concentration of arsenic in various seafood: crabs (shrimp, prawns), molluscs (mussels), and cephalopods (squid) available both fresh on the market and frozen in supermarkets in Sarajevo, Bosnia and Herzegovina were determined by the electrothermal atomic absorption spectrometry (ETAAS). The results obtained using different matrix modifiers: Mg(NO3)2, Ni(NO3)2, Pd(NO3)2, and mixture Pd(NO3)2 + Mg(NO3)2 were compared. The best recovery rate of 98.4 % arsenic for the reference material ERM-CE278k, was achieved after the addition of the mixture Pd(NO3)2 + Mg(NO3)2 . The mean arsenic concentrations were 1.551 ? 0.836 mg kg-1 1.298 ? 0.410 mg kg-1, and 2.794 ? 0.958 mg kg-1 for crustaceans, molluscs and cephalopods, respectively, by using mixture Pd(NO3)2 + Mg(NO3)2 as matrix modifier. Arsenic concentrations in the same sample measured using different matrix modifiers varied widely, even above 70 %. With the current consumption rate of seafood products, both cancerogenic and non-cancerogenic risks associated with exposure to arsenic through seafood are very low for the residents of Bosnia and Herzegovina.

Background: In recent years, research efforts have focused on understanding virtual environments and the importance of collaboration in such environments. The spread of remote working, exacerbated by the global pandemic and changing workforce dynamics, has meant that organizations are increasingly reliant on dispersed teams. Building trust in virtual teams is paramount to fostering effective collaboration, and achieving common goals. Trust reduces uncertainty, promotes collaboration and facilitates open communication between team members. Building trust in virtual contexts is challenging due to limited face-to-face interactions. In addition, knowledge sharing plays a crucial role in improving team effectiveness by enabling information sharing and problem solving. The lack of physical proximity in virtual environments is a barrier to spontaneous knowledge sharing and highlights the critical need for a culture that encourages knowledge sharing. Methodology: This study highlights the importance of cultivating a supportive virtual environment, ensuring psychological safety and utilizing technical platforms to facilitate information sharing. Quantitative data and survey methods are used to explore the integral impact of trust, knowledge sharing, collaboration, and team effectiveness. Findings and Conclusions: The results of this study contribute to the existing literature on virtual teamwork by highlighting techniques and practices that improve team performance. The finding that trust and information sharing play a central role in virtual teams can help organizations develop effective virtual work policies, design appropriate training programs, and select suitable collaboration platforms. Limitations and Future Research: While the study provides valuable insights, the generalizability of the findings to other contexts is limited by the restriction to a single sample. Replicating the study in different organizational contexts would improve the robustness of the results. Furthermore, the cross-sectional nature of the study limits the possibility of proving causality. Future research efforts could use longitudinal studies to examine the complex relationships between trust, teamwork, collaboration, and knowledge sharing over time.

The article aims to mathematically model processes that occur in non-metallic heterogeneous materials when active thermography methods were used for deep study control. Currently, the trend in industrial development is using non-metallic heterogeneous mediums as a system of various components as structural materials. Such materials are characterized by improved physical and mechanical properties, which can be adjusted by selecting compositions and the ratio of component phases and macrostructure. At the same time, they are characterized by disadvantages such as variability of volume and time properties and the presence of various defects. Effective control methods are of particular importance to ensure the quality and reliability of products made from materials of this class. In the article, the authors analyzed the capabilities of existing non-destructive testing methods for flaw detection of products made of non-metallic heterogeneous materials. When developing a new and improving an existing measurement method, the problem of establishing a set of radiation parameters was used. This allowed for describing the state of the material with the necessary accuracy and the functional connections of these parameters with the latter’s characteristics.

Background: The etiology of oral ulceration is multicausal with numerous predisposing factors. Studies by various authors cite Helicobacter pylori infection as a possible cause of certain oral ulcerations. Objective: The aim of the study is to prove the presence of Helicobacter pylori in the oral cavity of patients with oral ulcerations, as well as to examine the relationship between the presence of Helicobacter pylori in the oral cavity and the development of oral ulcerations. Methods: The study included regular patients at the Department and Clinic of Oral Medicine and Periodontology, Faculty of Dental Medicine, University of Sarajevo, suffering from oral ulcerations, as well as healthy patients without oral diseases. The diagnosis of oral ulceration is based on a thorough history, clinical examination, and exclusion of other oral diseases. All patients were taken anamnestic data on the existence of digestive system diseases, and by reviewing medical documentation, a previously diagnosed digestive system disease by a gastroenterologist was recorded. A cytological smear was taken in all 80 cases, in patients with ulcerative lesions a smear was taken from the lesion and in healthy subjects from the mucous membrane of the palate, cheek and tongue. Highly sensitive and specific polymerase chain reaction (PCR) was used to determine the presence of Helicobacter pylori in the oral cavity and oral lesions. Results: The results of our study showed that there is no statistically significant difference between the presence of Helicobacter pylori in the oral cavity of patients with oral ulcerations and subjects with healthy mucosa. Conclusion: Helicobacter pylori is not a risk factor for the development of oral ulcerations and can be found on the oral mucosa as a transient pathogen.

Eduard von Keyserlings erster Roman Fräulein Rosa Herz (1887) war kein Bestseller. Da sich Keyserling später selbst von seinem Frühwerk distanzierte, überrascht auch die vernachlässigende Einstellung der Forschung gegenüber diesem Werk nicht. Für das Verständis von Keyserlings Poetik erweist sich der Roman jedoch als wichtige Grundlage. Der Text behandelt viele zeitspezifische Themen, darunter auch die Adoleszenz, wobei Keyserlings Schreiben generell der weiblichen Adoleszenz mehr Aufmerksamkeit schenkt. Die einzelnen Problempunkte, die Keyserling dabei aufgreift, werden auch in diesem Beitrag dargestellt. Obwohl Fräulein Rosa Herz in den 80er Jahren des 19. Jahrhunderts erscheint und traditionell nicht als Adoleszenzroman bezeichnet wurde, kann der Roman als interessanter und wertvoller Beitrag zur Adoleszenzliteratur der Moderne betrachtet werden.

Project risk management is one of the project management knowledge areas that identifies, analyzes and deals with project risks. One of the important factors influencing the decision-making of a project-based organization is the level of risk tolerance of organization. This study focuses on the factors affecting the level of risk tolerance of project-based organizations. For this purpose, in the first step, the potential factors affecting risk tolerance are extracted by reviewing the related literature. In the next step, the factors affecting the organization's risk tolerance level are identified by using the Fuzzy Delphi method in several steps. The most effective factors are identified by experts? judgment using a questionnaire. Then, the relationships between these factors are determined by using the Interpretive Structural Modeling (ISM) method. The intensity of these relationships and the intensity of the effect of the factors are investigated by using the Fuzzy DEMATEL method. Finally, the factors are ranked based on their weights by utilizing the Fuzzy DEMATEL method. In this study, 13 external and internal factors are ranked using questionnaires based on the experts? opinions. Four external factors include political conditions and international relations, the conditions of the capital markets such as stock market, investment security and government support. These factors have significant influence on the other factors as well as the project-based organization. The findings of this study direct project managers to accurately identify the risk tolerance level of the key project stakeholders in order to efficiently plan and implement project risk management and achieve project goals.

Ovaj rad u svom uvodnom dijelu nudi informaciju o dvodnevnoj međunarodnoj naučnoj konferenciji Institucija hifza Kur’ana u Bosni i Hercegovini, o njenom značaju, učesnicima i izloženim radovima. U drugom dijelu se fokusira, kao nastavak tematici Konferencije, na temu odnosa između hifza Kur’ana i razumijevanja značenja njegovog teksta. Govori se o dilemi šta je za muslimana važnije: memorisanje Teksta ili njegovo razumijevanje. Nudi se odgovor na tu dilemu i nudi metoda učenja hifza uz razumijevanje sadržaja. Na kraju se predlaže određeni oblik druženja hafiza jednog područja na programu analize odabranih odlomaka iz Kur’ana i preuzimanje ponuđenih pouka i principa iz njega važnih za praktični život muslimana uopće, a posebno hafiza kao primjernih individua ovog ummeta.