In this paper, we have modeled and simulated the magnetic field of the conductor by using the finite element method, which is incorporated in Ansoft Maxwell software. Modeling and simulation are done for a conductor and two conductors located at a small distance between them. Our study is based on the method of finite elements and Biot-Savart law for calculating the magnetic field depending on the distance from the conductor. We have observed that the calculated values of the magnetic field are in good accordance with Biot-Savart law [1]. We have found that magnetic field normal to the main axis of the conductor falls linearly towards it, whereas outside the conductor magnetic field is inversely proportional to distance. In the case of simultaneous calculation of the field inside and outside the conductor, a small margin has been found. This difference is as a result of the simultaneous calculation of magnetic field in two environments with different magnetic permeability. Finally, we have computed the magnetic field at an equal point between two conductors when the currents have opposite and same direction, whereby a huge difference between the magnetic fields is found. We show that we can amplify or reduce the intensity of the magnetic field, based not only on the distance between the conductors but also on the basis of the directions of the currents flowing through these conductors.

With the development of construction technology, self-compacting concrete hasstarted to be widely used in the construction of buildings. The specific properties of selfcompacting concrete have made it particularly useful for concreting the structuralelements of high-rise buildings. The strains characteristics of concrete are important toknow both in the initial stage of concreting and in the long process, in order to takemeasures to minimize their impact on cracking and reduction of structure elements.In this regard we have conducted an experiment to investigate shrinkage strains andcreep strains in reinforced concrete beams as well as the determination of the creepcoefficient. Given that the shrinkage and creep strains are together, it is necessary toseparate the creep strains from the shrinkage strains to determine the creep coefficient.For the realization of this separation, we have prepared the same samples which havebeen used for the determination of shrinkage strains and samples which have beeninserted into the mechanisms for the realization of adequate force for thedetermination of the creep strains.

Aim: The purpose of this research is to analyze the neutrophil-to-lymphocyte ratio (NLR) to define prognostic factors in patients with breast cancer and to analyze the NLR values among stages, grades, and fractions. Methods: The data retrieval period was from October 2018 to June 2020. The study included 56 patients who were part of the research. The mean age of patients was 53.42 years. Results: On average, NLR after radiotherapy was higher than before treatment. Moreover, the 5-year overall survival rate for breast cancer patients treated with radiotherapy was 81%. Conclusions: Based on the NLR results for patients with breast cancer, it is confirmed that the ratio of patients with poor prognosis compared to those with good prognosis is 3.3 to 1. Specifically, all stages of breast cancer showed an increase in NLR after treatment. The exception was stage III, which showed lower NLR values after treatment and, consequently, a better prognosis of the disease.

Radon activity concentrations has been surveyed in dwellings in the vicinity of an open-cast lignite mine and two lignite-fired power plants in the Pristina region, Kosovo. For this purpose solid-state nuclear track detectors CR-39 were exposed in the winter period for three months. Radon activity concentration ranged from 41 Bq m−3 to 327 Bq m−3, and the resulted annual effective doses was, from 0.74 mSv y−1 to 5.83 mSv y−1. The relationships of radon levels with the age of buildings, building material and local geology has been sought and is discussed. The impact of lignite-fired power plants on indoor radon concentration has not been observed.