In the modern telecommunication systems, mobility is one of the key advantage of wireless communications, given that it is possible to transmit/receive data, without caring of having a static position into the network. Of course, mobility poses special issues such as degradations, channel quality fluctuations, fast topology changes, and so on. Modern researches focus their attention on predicting mobile future node positions, in order to a-priori know, for example, what the evolution of the network topology will be or which level of stability each node will reach. Each prediction scheme is based on the storage and analysis of several historical mobility trajectories, in order to train the proper prediction algorithm. In this paper, we focus our attention on the optimization of the space needed to store historical mobility samples, encoding their values and evaluating the conversion error, comparing different encoding functions. Several simulation campaigns have been carried out in order to evaluate the goodness and feasibility of our proposal.

To tackle a specific class of engineering problems, in this paper, we propose an effectively integrated bat algorithm with simulated annealing for solving constrained optimization problems. Our proposed method (I-BASA) involves simulated annealing, Gaussian distribution, and a new mutation operator into the simple Bat algorithm to accelerate the search performance as well as to additionally improve the diversification of the whole space. The proposed method performs balancing between the grave exploitation of the Bat algorithm and global exploration of the Simulated annealing. The standard engineering benchmark problems from the literature were considered in the competition between our integrated method and the latest swarm intelligence algorithms in the area of design optimization. The simulations results show that I-BASA produces high-quality solutions as well as a low number of function evaluations.

This paper analyzes the vollatility spillover between the conventional index in Malaysia FTSE Malaysia KLCI (KLSE) and the Islamic index in Malaysia FTSE Bursa Malaysia Shariah Index (FTFBMHS). Monthly observations spanning in a period from 2002 to 2018 are obtained from investing.com database. GARCH model and Johansen cointegration test are used to investigate volatility spillover and the relationship between two indices. The results of the analysis indicate that in the short-run there is volatility spillover between FTSE Malaysia KLCI and FTSE Bursa Malaysia Shariah Index, while in the long-run there is no relationship between the two indices. The methodology of compiling Islamic indeces is based on Shariah law. Keywords: Conventional

Abstract The paper presents results of the measurements of the tropospheric ozone (O3) concentration and meteorological parameters: temperature, air pressure, relative humidity, speed and wind direction. The data were collected from January 2016 to December 2016 at station located in locality Centre (Banja Luka), Republic of Srpska, Bosnia and Herzegovina. Ozone is one of the most harmful pollutants to plants and health and highly reactive secondary pollutant. The present study covers investigation of the relationship between the concentration of ozone and meteorological parameters as well as time variations of ozone concentration (by hours, months, seasons). This topic has not been studied up to now in this region, although the recent research data indicates that there is a correlation between them and previously obtained from the world’s relevant scientific centres, as already cited above. Statistical analysis confirms string of rolls, which shows directional connection between tropospheric ozone and meteorological parameters, specially temperature (r = 0.148), air pressure (r = –0.292) and relative humidity (r = –0.292). These parameters are the most important meteorological factors influencing the variation in ozone levels during the research. The correlation ozone concentrations with speed and direction of wind is not significant, like other parameters.

Abstract The paper proposes a discrete-time sliding mode controller for single input linear dynamical systems, under requirements of the fast response without overshoot and strong robustness to matched disturbances. The system input saturation is imposed during the design due to inevitable limitations of most actuators. The system disturbances are compensated by employing nonlinear estimation by integrating the signum of the sliding variable. Hence, the proposed control structure may be regarded as a super-twisting-like algorithm. The designed system stability is analyzed as well as the sliding manifold convergence conditions are derived using a discrete-time model of the system in the δ-domain. The results obtained theoretically have been verified by computer simulations.

Introduction: Diabetes and depression are two common and major non-communicable diseases with significant disease burdens worldwide. Aim: The aim of this study is to obtain the association among A1C levels and symptoms of depression in patients with type 2 diabetes in family medicine offices. Methods: This cross-sectional study was carried out between June 2016 and July 2017. We recruited 150 adults with type 2 diabetes from various family medicine offices. The study questionnaire had two parts; the first one for participants and the second one for family medicine physicians. Participants completed the part of the questionnaire with the PHQ-9 scale and questions regarding demographic data. Family medicine physicians completed the part of the questionnaire with questions concerning clinical data. A univariate and multivariate linear regression analysis was conducted to identify significant predictors of depressive symptoms revealed by the PHQ-9 score. Results: Multiple linear regression showed that the level of A1C was a significant predictor of the PHQ-9 score in all three models. Increases in the A1C level were followed by increases in depressive symptoms. Other significant predictors of a positive PHQ-9 score were smoking, level of education and income. Conclusion: The level of A1C as an indicator of glycemic control has been shown to have a significant association with the scores of the PHQ-9 questionnaire, which identifies the intensity of symptoms of depression. An increase in the level of A1C is followed by an increase in the intensity of symptoms of depression.

Bosnian language is a very important factor of Bosniak identity. It owns active and passive vocabulary. Bosniak identity is confirmed by the Bosnian language. Identity and language are causally linked.

Vehicle routing problem as the generalization of the Travelling Salesman Problem (TSP) is one of the most studied optimization problems. Industry itself pays special attention to this problem, since transportation is one of the most crucial segments in supplying goods. This paper presents an innovative cluster-based approach for the successful solving of real-world vehicle routing problems that can involve extremely complex VRP problems with many customers needing to be served. The validation of the entire approach was based on the real data of a distribution company, with transport savings being in a range of 10-20 %. At the same time, the transportation routes are completely feasible, satisfying all the realistic constraints and conditions.

Background: Coronavirus disease 2019 (COVID-19), like any other pandemic, has imposed an unprecedented threat to physical and mental health to all nations, worldwide. There is no enough evidence in the literature in this area. The present study has been done to explore the organization of psychiatric services in Bosnia and Herzegovina (BH) to meet mental health needs of BH citizens during the particular restrictive measures caused by COVID-19 pandemic. Materials and Methods: This online survey has been done for BH psychiatric institutions. Data were collected from psychiatric institutions in the mental health network of BH. A total of 38 complete responses have been received. Results: Of 38 study participants, three were the departments of psychiatry in university clinical centers, two were psychiatric hospitals, four were psychiatric wards in general hospitals, 27 were community mental health centers, and two were institutes for alcoholism and drug addiction. During the pandemic, all services functioned on a reduced scale, adhering to measures to protect and self-protect both staff and service users. Protective equipment was provided to staff in some institutions in a timely and complete manner and in some in an untimely and incomplete manner. Consultative psychiatric examinations were mainly performed through telephone and online, where it exists as a standard patient monitoring protocol. The application of long-acting antipsychotics was continuous with adherence to restricted and protective measures. In opiate addiction replacement therapy services, substitution therapy was provided for a longer period to reduce frequent contacts between staff and patients. Individual and group psychotherapy continued in reduced number using online technologies, although this type of service was not administratively regulated. An initiative has been given to regulate and administratively recognize telepsychiatry by health insurance funds in the country. A number of psychological problems associated with restrictive measures and fear of illness have been reported by patients as well as by the professionals in mental healthcare teams. There were no COVID-19-positive patients seeking help from institutions that responded to the questionnaire. In one center, infected people with COVID-19 from abroad sought help through the phone. Only one involuntary hospitalization was reported. The involvement of mental health professionals in the work of crisis headquarters during the design of the COVID-19 pandemic control measures varies from satisfactory to insufficient. Education of staff, patients, and citizens was regular with direct instructions through meetings, press, and electronic media. Conclusions: During the COVID-19 pandemic in BH, all psychiatric services functioned on a reduced scale, adhering to measures to protect and self-protect staff and service users. All patients who asked for help have been adequately treated in direct inpatient or outpatient mental healthcare or online, despite telepsychiatric services not being recognized in health system in BH. There were neither infected patients nor staff with COVID-19 in the psychiatric institutions who responded in this research. A large-scale, multicenter study needs to be performed to get a broader picture and to guide us for future better service planning and delivery.

Introduction: Cigarette or hookah smoking, as well as alcohol consumption and abuse, are considered to be the most common etiological factors for the onset of oral cavity diseases, such as changes on the lips, tongue, stomatopyrosis, glossopyrosis, candidiasis. Aim: Research aims to determine the harmful effect of smoking the hookah as well as other harmful factors on the oral health of the student population of the Faculty of Dentistry in Sarajevo. Methods: The fourth, fifth, and sixth-year students of the Faculty of Dentistry in Sarajevo participated in this cross-sectional study. All of them are systemically healthy and consume some harmful habits: smoking cigarettes, alcohol consumption, and hookah. All students participated in the study voluntarily and they signed informed consent before the clinical examination. All the subjects gave an extensive medical history which recorded all the data on oral hygiene, harmful habits, manner and length of consumption; they were also given a clinical examination of the oral mucosa and the periodontium, as well as determining periodontal indices, and oral tests that are used for diagnostic purposes. The data is entered into work charts specially designed for these purposes. Results: The results are statistically processed in the SPSS Statistics 21.0 program and are discussed along with the results of other authors, published in relevant databases. Conclusion: The conclusion consists of important facts that originate from the results and the discussion.

It is well-known that determining the optimal number of guards which can cover the interior of a simple nonconvex polygon presents an NP-hard problem. The optimal guard placement can be described as a problem which seeks for the smallest number of guards required to cover every point in a complex environment. In this paper, we propose an exact twophase method as well as an approximate method for tackling the mentioned issue. The proposed exact approach in the first phase maps camera placement problem to the set covering problem, while in the second phase it uses famous state-of-the-art CPLEX solver to address set covering problem. The performance of our combined exact algorithm was compared to the performance of the approximate one. According to the results presented in the experimental analysis, it can be seen that the exact approach outperforms the approximate method for all instances.