The asphalt layer is an important financial part of the total cost of road infrastructure, so it is necessary to analyze and consider all the elements that may affect the quality of the same. One of them is certainly the influence of temperature during the installation of asphalt mass. Namely, neither high nor low temperature of asphalt and the environment are favorable for its installation, so it is necessary to find optimal conditions for the installation of asphalt in order to achieve the best possible results of compaction and cavities in the asphalt layer. The aim of this research is to find the optimal conditions for its installation by comparative analyzes of different temperatures of the asphalt mixture and the environment, in order to obtain the lowest percentage of cavities in the asphalt layer. The legal regulations, ie technical conditions, define the minimum temperature of the asphalt mixture as well as the limit air temperature during the installation of asphalt, but special emphasis is placed on the impact of the temperature of the asphalt installation on the cavities in the asphalt layer. Therefore, the paper observes the optimal temperature of the asphalt mixture so that the smallest possible percentage of cavities in the asphalt layer is obtained. Keywords: asphalt mixture temperature, installation, cavities
Ensuring safety is of paramount importance in physical human-robot interaction applications. This requires both adherence to safety constraints defined on the system state, as well as guaranteeing compliant behavior of the robot. If the underlying dynamical system is known exactly, the former can be addressed with the help of control barrier functions. The incorporation of elastic actuators in the robot's mechanical design can address the latter requirement. However, this elasticity can increase the complexity of the resulting system, leading to unmodeled dynamics, such that control barrier functions cannot directly ensure safety. In this paper, we mitigate this issue by learning the unknown dynamics using Gaussian process regression. By employing the model in a feedback linearizing control law, the safety conditions resulting from control barrier functions can be robustified to take into account model errors, while remaining feasible. In order to enforce them on-line, we formulate the derived safety conditions in the form of a second-order cone program. We demonstrate our proposed approach with simulations on a two-degree-of-freedom planar robot with elastic joints.
. We obtain a meromorphic continuation of the generalized Tribonacci zeta function to the whole complex plane. The residues of the generalized Tribonacci zeta functions associated to the third-order Jacobsthal, Tribonacci and Narayana sequence at negative inte-ger poles are computed.
Mycoplasma ovipneumoniae, a well-established respiratory pathogen of sheep and goats, has gained increased importance recently because of its detection in wild ruminants including members of the Cervidae family. Despite its frequent isolation from apparently healthy animals, it is responsible for outbreaks of severe respiratory disease which are often linked to infections with multiple heterologous strains. Furthermore, M. ovipneumoniae is characterized by an unusually wide host range, a high degree of phenotypic, biochemical, and genomic heterogeneity, and variable and limited growth in mycoplasma media. A number of mechanisms have been proposed for its pathogenicity, including the production of hydrogen peroxide, reactive oxygen species production, and toxins. It shows wide metabolic activity in vitro, being able to utilize substrates such as glucose, pyruvate, and isopropanol; these patterns can be used to differentiate strains. Treatment of infections in the field is complicated by large variations in the susceptibility of strains to antimicrobials, with many showing high minimum inhibitory concentrations. The lack of commercially available vaccines is probably due to the high cost of developing vaccines for diseases in small ruminants not presently seen as high priority. Multiple strains found in affected sheep and goats may also hamper the development of effective vaccines. This review summarizes the current knowledge and identifies gaps in research on M. ovipneumoniae, including its epidemiology in sheep and goats, pathology and clinical presentation, infection in wild ruminants, virulence factors, metabolism, comparative genomics, genotypic variability, phenotypic variability, evolutionary mechanisms, isolation and culture, detection and identification, antimicrobial susceptibility, variations in antimicrobial susceptibility profiles, vaccines, and control.
Background: Myocardial surgical revascularization in patients with low left ventricular ejection fraction (LVEF) is accompanied by a high rate of morbidity and mortality. Objective: The aim of this study was to investigate and eliminate the reasons for the most common perioperative and postoperative complications. Methods: A total of 64 were analyzed. of patients during 2019 who underwent coronary artery bypass grafting (CABG), average age 61.29±9.12 years. Results: Out of the total number of operated patients, there were 16 women and 48 men. Patients were divided into two groups. The first group consisted of patients who underwent surgery with the use of cardiopulmonary bypass (cCABG-CPB) and the second group those who underwent surgery without the use of cardiopulmonary bypass (OPCAB). In 41 patients, myocardial infarction was previously recorded. Critical stenosis of the main trunk of the left coronary artery was present in 14 patients. The incidence of postoperative complications was higher in the cCABG-CPB 16/10 group (p0.030). Conclusion: In our study, we confirmed that myocardial revascularization is justified, especially in the case of multivessel coronary disease. In the long term, it significantly improves the systolic function of the left ventricle, and thus and quality and length of life.
The development of material production technology has led to the application of new materials in construction. Because concrete is currently the most commonly used construction material, which in addition to numerous advantages (water resistance, low maintenance costs, easy workability, low cost, etc.) also has certain disadvan- tages (low tensile strength and brittle fracture behavior). Reinforcement of concrete using discrete fibers, ran- domly distributed, is an acceptable solution for improving the ductility of concrete. Carbon fiber reinforcement (CFRP) has been widely studied in the last two decades, as it represents a suitable alternative for the reinforce- ment of existing (endangered) RC structures. The advantages of this material are reflected in the relatively simple application, increased performance of the RC structure, low weight of the elements, etc. The paper also analyzes the existing cases of application of this material, as well as the presentation of previous research in the field of structural reinforcement using carbon fibers. Key words: Carbon fiber, Carbon fiber-reinforced polymer (CFRP), reinforcement concrete structures, reinfor- cement of existing structures, structural behavior of construCTIONS
Background: Human papillomaviruses (HPV) are one of the most prevalent causes of cervical, anal, and oral cancer, and it is believed that nearly all sexually active males and females have been infected with HPV at some point in their lives. Objective: The purpose of this study is to highlight epidemiological characteristics of the age and genotypical incidence of HPV infection among females in Canton Sarajevo during a 10-year period. Methods: This cross-sectional study was conducted in the period between January 2012 and December 2021 at the medical institutions “Zavod za Ginekologiju, Perinatologiju i Neplodnost “Mehmedbašić“ among females who were admitted for a routine gynaecological exam in Canton Sarajevo in Bosnia and Herzegovina. Results: In total, 1517 patients who reported typical sexarche at 18.35±1.92, having one 721 (47.5%) sexual partner, regular use of contraceptive methods 820 (54.5%) with male condom 513 (62.6%) being the dominant choice of contraception and having gynacological hereditary oncological positive history 141 (9.3%), were included in the study from which 653 (43.05%) patients had positive HPV test and 864 (56.95%) had negative HPV results. HPV positive patients, 386 (59.1%) were infected either with one type of virus only, while 267 (40.9%) patients were infected with multiple virus strains where we have identified 166 virus strain combinations. Analysis showed that the patients infected by only one virus strain were one of next specific HPV viruses: 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59, 66 and 68. HPV-16 was the predominately strain 16 (22.5%) identified among all the patients. Mean age of HPV positive patients was 33.38±7.85, ranging from 18 to 61 years. Conclusion: This study highlights the significance of the most frequent HPV high-risk strains (HPV-16, -18, -31.-33,-45,-52, and -58) among the Bosnia and Herzegovina population as one of the most common cancer-causing strains worldwide.
Background: Restrictive measures implemented by governments around the world to control the coronavirus have an impact on communication, especially the communication of the elderly. Objective: The aim for the article is to determine the attitudes of the elderly towards the ways of communication during the COVID 19 pandemic, and to present the challenges faced by the elderly when using digital ways of communication. The goal is also to point out the importance of providing adequate social support to the elderly. Methods: The sample consisted of 71 respondents from Bosnia and Herzegovina, aged over 60 years, divided into two groups. The questionnaire was used to gather information from respondents on their demographic characteristics as well as to examine participants’ attitudes and confidence regarding the manner and risk of communication associated with COVID-19. Results and Discussion: The results of this research showed that the elderly are actively using digital technologies, but that they are largely dissatisfied with their skills in using digital technologies. Most of the information during the COVID 19 pandemic is given to elderly people via television and telephone (video) conversations with family members and friends. 57.7% of the elderly stated that they greatly lacked direct communication, and it turned out that people living in elderly homes were in a slightly more favorable position. As many as 4/5 of the respondents reported feelings of anxiety, fear, loneliness, and depression. Conclusion: The older part of the population (those over 60 years old), especially in developing countries, including Bosnia and Herzegovina, is facing the challenge of “digitization of communication“. In the context of the COVID-19 pandemic, the elderly are “calling“ for special support and the provision of training and access to technological resources in order to reduce negative psychological consequences and go one step further in creating an “elder-friendly” society.
InxGa1−x N is a strategically important material for electronic devices given its tunable bandgap, modulated by the In/Ga ratio. However, current applications are hindered by defects caused by strain relaxation and phase separation in the material. Here, we demonstrate growth of homogeneous InxGa1−x N films with 0.3 < x < 0.8 up to ∼30 nm using atomic layer deposition (ALD) with a supercycle approach, switching between InN and GaN deposition. The composition is uniform along and across the films, without signs of In segregation. The InxGa1−x N films show higher In-content than the value predicted by the supercycle model. A more pronounced reduction of GPCInN than GPCGaN during the growth processes of InN and GaN bilayers is concluded based on our analysis. The intermixing between InN and GaN bilayers is suggested to explain the enhanced overall In-content. Our results show the advantage of ALD to prepare high-quality InxGa1−x N films, particularly with high In-content, which is difficult to achieve with other growth methods.
The development of mobile health (mHealth) applications has revolutionized health and fitness management by providing users with innovative digital tools to monitor and improve their well-being. These apps integrate features such as step counting, health tracking, and activity monitoring, making them valuable for personalized health interventions. However, ensuring effective user engagement remains a critical challenge. Persuasive System Design (PSD) strategies are essential for influencing user behaviour, improving adherence to health interventions, and enhancing app usability. Despite extensive research on PSD strategies, a structured framework that prioritizes the most effective strategies for mHealth apps is lacking. This study aims to address this gap by utilizing the Fuzzy Analytic Hierarchy Process (Fuzzy AHP) to identify and rank the most influential PSD strategies for health and fitness mobile applications. By gathering expert opinions from product managers, this research will develop a structured Top 10 PSD Strategies Model that offers product designers a prioritized framework for implementing persuasive techniques. The findings will help improve user retention, engagement, and overall app success.
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