Higgs boson production via gluon-gluon fusion and vector-boson fusion in proton-proton collisions is measured in the $H\rightarrow W W^* \rightarrow e\nu \mu\nu$ decay channel. The Large Hadron Collider delivered proton-proton collisions at a center-of-mass energy of 13 TeV between 2015 and 2018, which were recorded by the ATLAS detector, corresponding to an integrated luminosity of 139 fb$^{-1}$. The total cross sections for Higgs boson production by gluon-gluon fusion and vector-boson fusion times the $H\rightarrow W W^*$ branching ratio are measured to be $12.0\pm1.4$ and $0.75\;^{+0.19}_{-0.16}$ pb, respectively, in agreement with the Standard Model predictions of $10.4\pm 0.6$ and $0.81\pm 0.02$ pb. Higgs boson production is further characterized through measurements of Simplified Template Cross Sections in a total of 11 kinematic fiducial regions.

In this paper, the authors analyze the advantages and limitations of freelancing in four countries of Western Balkan. This work is based on the research with a total sample of 1031 respondents; 408 respondents from Serbia, 201 from Montenegro, 221 from North Macedonia, and 201 from Bosnia and Herzegovina. For the needs of the research, a special questionnaire was constructed and conducted by an electronic survey. The first goal of the research is to describe the functioning of freelancers in four countries, and the second is to describe the similarities and differences between countries of Western Balkan. In general, freelancers in all four countries have positive attitudes towards freelancing, although there are differences between them. Freelancers are especially satisfied with their income, and in Bosnia and Herzegovina with flexible working hours. No statistically significant differences were found among freelancers from four countries of Western Balkan in the structure of jobs they have worked in the last two years, nor in the assessment of the positive effects of new technologies on new forms of employment. They do not differ either in understanding that the work in the "Gig Economy" had less negative than positive effects on their private lives and in the fact that there are no differences in the assessment of the positive effects of freelance on the quality of life. They are no differences in terms of the proposed measures to improve the position of workers in the "Gig Economy". Unfortunately, there are also no differences in basic social rights (lack of health, disability, and pension insurance). The most significant differences have been noted between freelancers from Montenegro and freelancers from the other three countries. Freelancers from Montenegro see less positive contributions working in the "Gig Economy" than others, and they significantly more often believe that the "Gig Economy" can’t reduce unemployment and prevent brain drain abroad. The authors explain the negative attitudes of freelancers from Montenegro towards their work in the "Gig Economy" with the lower prevalence of freelancers, poorer job structure, and lower income with an unfavorable socioeconomic status.

In this study, the authors analyzed the problematic use of pornographic websites and Internet sex addiction in representative samples of respondents from different age groups including 2948 respondents from Serbia and 1486 from Montenegro. A standard questionnaire of 33 questions with answers in binary form was used. In addition to epidemiological indicators, the study also included nine family risk factors and six risk factors associated with early psychosocial developmental disorders. Finally, the social profiles of Internet sex addicts in Serbia and Montenegro were described. The results of the research showed that Internet sex addicts are mostly young adults aged 20 to 30. The overall dependency rate was estimated within average limits. In general, Internet sex addiction is among the lowest of all behavioral addictions. The authors see the reason for this in the greatest potency of this addiction for the development of addictive patterns of behavior, but also in the great predictiveness of this addiction together with the gambling addiction for the emergence and development of other behavioral addictions. All examined risk factors (except for shyness and reticence) do "separate" Internet sex addicts from those who do not have the listed risk factors at zero level of significance. However, an examination of the prediction of Internet sex addiction using binary logistic regression showed that aggressive and criminal behaviors in early youth, followed by disorders in educational and emotional relations between parents and children, have the highest predictive values for Internet sex addiction. Social profiles are unclear and unstructured, and the authors explain this by the fact that biological, not sociological, and sociocultural factors play a dominant role in developing addictive patterns of behavior.

In the past three years, the COVID-19 became a global health issue and had huge impact on education. This study investigates and compares the student performances after transition from face-to-face learning environment to online learning environments as a result of the spread of the pandemic. Data is collected from a large Bosnian public university and analyzed using statistical tools. In this study student success is defined as passing the course. The results showed that there is significant difference in the performances of students, and it is dependent on learning environment. Particularly, students who attended online classes have significantly higher-grade point averages.

A recently developed prototype (Laparoscopic Differential Magnetometer, in short LapDiffMag) identifies magnetic tracer accumulated inside sentinel lymph nodes (SLNs) during clinical laparoscopic procedures. The LapDiffMag relies on excitation of superparamagnetic iron oxide nanoparticles (SPIONs) and subsequent laparoscopic detection based on a nonlinear detection principle. The prototype uses an excitation coil to generate a magnetic field needed to activate SPIONs. This study reports on the process of developing a new excitation coil by describing the design choices based upon clinical requirements, by modeling delivered magnetic field using digital twin, and by comparing the magnetic fields of modeled and manufactured prototype. Digital twin technology was used to produce relevant and reliable data to demonstrate the safety and effectiveness of the excitation coil. The magnetic field originating from manufactured prototype was validated at two different heights above the excitation coil and have shown a good concordance to the data generated by its digital twin. Clinical Relevance– Current standard-of-care for a variety of tumor types consists of minimally invasive radical resection of primary tumor and regional lymph nodes (LNs). The newly introduced excitation coil will (after full validation) enable minimally invasive harvesting of sentinel LNs by means of magnetic tracer detection.

Abstract Underfrequency load shedding is a common technique for maintaining the stability of the power system by removing the overload in a certain part of the system after a disturbance. The purpose of underfrequency load shedding is to balance output and load when a particular event causes a significant frequency drop in the power system. In conventional underfrequency load shedding schemes, the frequency thresholds of frequency relays are constant, this way it is difficult and sometimes impossible to control the frequency in various disturbances in the system. In this paper, an adaptive underfrequency load shedding (AUFLS) algorithm that is independent of communication between relays is presented. The relays are tuned to reduce loads taking into account local parameters such as voltage and frequency to prevent the occurrence of a cascade failure that can ultimately lead to the breakdown of the entire power system. In this paper, the rate of change of frequency (ROCOF) is obtained by applying the Hilbert-Huang transformation. Numerical simulations conducted on the New England 39 bus test system in the DIgSILENT PowerFactory and MATLAB software packages confirm the effectiveness of the proposed approach.