Graphene has a large optical nonlinearity and supports electrically-tunable and long-lived plasmons. We present an experimental study of harmonic generation in graphene heterostructures, which enhance the nonlinearity and allow plasmons to mediate the non-linear response.

In this paper, the possible synergistic effects of fly wood biomass ash (WBA) and recycled tire polymer fibres (RTPF) on long-term autogenous shrinkage and drying shrinkage in mortar were investigated, and the pore structures of mortar specimens with WBA and RTPF were determined. The results showed that the use of RTPF and WBA has an effect on the pore structure of mortars and thus on the results of autogenous shrinkage. When WBA and RTPF were used, the autogenous shrinkage tended to decrease; however, this was not the case for the drying shrinkage. The greatest reduction in autogenous shrinkage was achieved by the addition of WBA and RTPF; autogenous shrinkage was reduced by 62 % after 90 days compared with the reference mixture.

The polarized massive multiple-input multiple-output (MIMO) technique has been regarded as a promising solution to millimeter wave (mmWave) communication systems, because it experiences more degrees-of-freedom than the scalar configuration, and it represents a significant opportunity for secure communication. To deliver smart service to terminals, it is essential to provide base stations (BS) with the capability of terminal’s direction-of-arrival (DOA) awareness. In this paper, a compressive sampling (CS) framework is proposed for two-dimensional (2D) DOA and polarization estimation in mmWave polarized massive MIMO systems. The proposed approach first reduces the data volume via a reduced-dimension matrix. Then it computes the signal subspace via the eigendecomposition of the compressed array measurement. Thereafter, the rotational invariance characteristic is utilized to form a normalized polarization steering vector. Finally, 2D-DOA and polarization are estimated by incorporating the Poynting vector and the least squares (LS) techniques. The proposed architecture is computationally much more economical than existing algorithms. Besides, it allows a mmWave BS to provide comparable estimation performance with arbitrary sensor geometry, which is more flexible than most of the existing architectures. Furthermore, it is robust to the sensor position error. Numerical simulations verify the advantages of the proposed framework.

The negative influence of timber harvesting on the forest environment is reflected through damage to the residual trees, regeneration, and forest soil. Considering that skidding, a popular extraction method, can cause substantial and severe damage to the remaining stand, the aim of this research was to determine damage to residual trees during skidding by an LKT 81T cable skidder, including oxen bunching. The research was conducted in eastern Bosnia and Herzegovina, in an uneven-aged mixed fir (Abies alba Mill.) and spruce (Picea abies L.) forest with pine (Pinus sylvestris L.) on limestone soils. Tree felling was conducted using a Husqvarna 372 XP chainsaw. Extraction operations caused damage to 6.31% of the residual trees in the stand. The most damage was “removed bark” (65.34%) and occurred on the lower parts of the tree, the butt end (55.11%) and root collar (32.39%). The average size of the damage was 197.08 cm2. A statistically significant correlation was found between the damage position and the diameter at the breast height (p < 0.05) and the damage position and damage size (p < 0.01) by Spearman correlation analysis. The conducted analysis by the chi-squared test showed that there is a statistically significant difference in the proportion of damage for trees with different distances to the nearest skid road (p = 0.0487), but the share of damaged trees did not decrease by increasing the distance from the skid road.

Background and study aim. Group fitness programs are a form of programmed physical exercises with the aim of improving health, aesthetic appearance, satisfying the motivation to preserve health and reduce body weight. The aim of this study was to determine the effects of an experimental cardio fitness program on the morphological status of female subjects aged 21.5 ± 3.5 years. Material and methods. The experimental program was implemented over a period of three months (12 weeks), with a weekly frequency (3 x 20-60 min). Initial and final measurements were performed and Body weight, Body fat percentage, Body fat mass, Free fat mass, Body muscle mass, Body mass index and Basal metabolism rate were analyzed. All test subjects have their doctor's confirmation that they are healthy and can undergo training loads in a planned and clearly defined cardio program. Results. The exercise program on cardio equipment caused changes in all body composition parameters between the initial and final measurements t-test (except for muscle mass). The total average Body weight at the initial-final measurement (66.45 vs. 64.70kg; t= 5.225, p<0.000), which represents a difference of -1.75kg after the program. Conclusions. The assumption is that a controlled and monitored program with a special focus on nutrition would lead to even more precise results on the effects on body composition. Continuous application of the content of this program throughout the entire one-year macrocycle with a higher weekly frequency would certainly give even more significant results.

This research focuses on the bacterium Listeria monocytogenes and its occurrence in vegetables, specifically, tomatoes and peppers, and the risks this bacterium poses to health. The research included laboratory analysis of 16 samples of tomatoes and peppers, as well as survey research in the area of the City of Mostar. Based on the survey questionnaire, the respondents showed their knowledge about the occurrence of the bacteria Listeria monocytogenes in food and their general knowledge about listeriosis. Laboratory analysis consists of two parts. The first part refers to the laboratory analysis of the samples conducted in the Federal Agro-Mediterranean Institute laboratory in collaboration with its employees. The second part refers to an additional laboratory analysis conducted in the Veterinary Institute of Herzegovina–Neretva Canton laboratory in Mostar. This laboratory research aimed to establish whether the bacterium Listeria monocytogenes was present in the samples of vegetables examined in the analysis. All the vegetable samples were chosen randomly from four different locations in the area of Mostar. Also, the analysis included the examination of the washed and unwashed tomatoes and peppers. After conducting the laboratory research, it was established that the bacterium Listeria monocytogenes was not found in the samples used, which means all the examination results were negative.

Experiential learning is one of the most productive ways of learning and acquiring knowledge. Through personal experience, students develop self-confidence, see more complex relationships in learning subjects, constantly have feedback on their own progress and are constantly in the circle of learning and gaining new knowledge. The paper emphasizes the role of experience in the changes that occur in an individual. Learning styles based on experience greatly influence the success of the learning process. The paper presents some of the theories that define how an individual learns when encountering new content thanks to previous experience, interests and affinities. A description of Kolb’s experiential learning theory, learning styles according to Honey and Mumford, the VARK learning model set by Fleming and Mills, as well as the criteria that experiential learning must meet in order to be efficient and purposeful.

The primary aim of the paper is to conduct research on the personality traits and pre-competition anxiety of Esports and sports players, in addition to confirming differences in personality and pre-competition anxiety between the two examined groups. The research has been conducted on 67 (N=67) subjects, 30 of whom are semi-professional or professional gamers who participate in state-level and regional-level competitions. The remaining 37 subjects are the highest-ranked athletes in Bosnia and Herzegovina. The t-test, a type of inferential statistic, has been used to determine statistical differences in disposition between the arithmetic means of the two groups, using BFI-44 (α=0.78) and CSAI-2 (α=0.60) measuring instruments. It has been anticipated that the Esports players are ranked lower at Extraversion (E) and Agreeableness (A) levels, while their Neuroticism (N) level is higher compared to the results of the athletes. The research indicates that all of the three hypotheses regarding the Big Five Model have been confirmed – on the scale of Extraversion (E) with significance levels of p=0.000 (p<0.0001); on the scale of Agreeableness (A) with significance levels of p=0.002 (p<0.01); on the scale of Neuroticism (N) with significance levels of p=0.042 (p<0.05). Furthermore, the fourth and fifth research hypotheses, proposing there is a statistically significant difference in cognitive and somatic anxiety (CSAI-2) in Esports players and athletes, were not confirmed. The sixth research hypothesis was confirmed, showing that there is a statistically significant difference between Esports players and athletes on the self-confidence dimension (CSAI-2) with p=0.030 (p<0.05). Results gathered on this sample could serve as an important part of understanding the differences between Esports players and athletes.

Taking an interdisciplinary approach, this paper analyses power play, speech strategies, and speech impact in Harold Pinter’s one-act play Mountain Language (1988), in which prison officials exercise power over inmates and their visitors through various tactics of control and subjugation. The paper’s methodological framework of corpus analysis is founded upon the linguistic features of police speak in the English language (a hybrid genre of spoken language police officers use when interrogating suspects), which, we propose, permeates the discourse in Mountain Language. The paper first reflects on discourses on/of power as observed in literary theory, then examines discursive strategies in the play, to illustrate speech impact caused by “conduct-regulating persuasion” and linguistic features of verbal violence. It also reflects on the concept of the persuasive power of discourse, in terms of the impact it may have on the mindset and behaviour of the interlocutor(s).

With the development of industry and technology, leisure time gains sociocultural importance. Leisure activities are an important predictor of personal growth and improvement of the quality of life. The purpose of this research is to examine patterns, but also to reveal tendencies and perspectives of youth spending their leisure time. 120 first and second-cycle students of the University of Sarajevo participated in the research. The results of the research showed that students put their free time into the function of rest, leisure, and personality development. They prefer to spend their leisure time with close friends or on their own. The respondents, when they do not have family, professional, and other obligations, spend their time socializing and going out, relaxing activities, and on social networks. Also, they believe that free time is essential for self-development and productivity, as well as that the biggest challenges concern the methodical organizational and methodical performance creation of free time. Accordingly, guidelines for structuring the environment are offered, which have the potential to remove obstacles and maximize educational effects in leisure time.

This research aimed to examine the experiences of students about the phenomenon of procrastination, investigating the following questions: Are students familiar with this phenomenon and do they report forms of behavior that can be characterized as procrastination? What are the reasons for such behavior? How does procrastination affect their emotions? Does procrastination negatively affect their psychophysical health? And finally, how do they deal with the negative consequences of procrastination? The study included 35 students from the Faculty of Teaching, University "Džemal Bijedić" in Mostar. Qualitative research was carried out to obtain answers to the questions posed. Through focus groups with students, the following topics were brought up to date: sources of procrastination, the consequences of such behavior on the psychophysical health of students, and the adaptation of students to such behavior. The results showed that students tend to procrastinate. The sources of procrastination were mainly the lack of motivation for work, poor organization of time, preoccupation with other, more interesting things, fatigue, tasks that were too easy, as well as the flexibility of professors to extend the deadlines for the completion of the tasks. Also, students reported that such behavior negatively affected their psychophysical health, however, despite this, they are not motivated to change it.

Equity in the academic context is an important construct that affects the cognitive, emotional, and behavioral reactions of an individual. The study of fairness in the work context is extremely important, considering that a person spends a lot of time in the workplace during his life. Several studies so far have shown that affecting one's perception of equity can affect the individual itself- improving one's productivity, satisfaction, and such. (Galinec 2017). Distributive equity is based on Adams' (1965) equity theory, more specifically on its assumption that people do not care as much about the absolute outcome, compared to the equity of the outcome itself. Regarding stress, the academic staff in Slišković (2012) explored different sources of stress that result in reduced productivity. Some of the universal sources of stress, such as inadequate compensation and recognition within an organization, are linked to distributive equity. The goal of the research was to show if distributive inequity exists within an academic environment and if that inequity reflects stress levels inside that environment. The academic workers who took part in this research are employees of the following higher education institutions: the University of Zenica, the University of Sarajevo, the University “Džemal Bijedić” in Mostar, and the University of Bihać. The inventory contains 21 items. The research took place in July 2022. The descriptive method was used as a scientific research method. The results show that academic workers perceive distributive inequity in certain situations, and it correlates with an increase in their stress levels.