The paper presents research conducted on the current VSS Vintorez rifle and the concept of an improved modular weapon system on the AM20 platform with a subsonic system of ammunition 9×39 mm. The test was conducted with the aim of comparing the characteristics of the weapon required for special tasks. The determination of the characteristics of the existing weapon and the concept of an improved modular system on the AM20 platform was carried out through experimental tests. The test was conducted to compare the accuracy and precision of the weapon with a subsonic ammunition system with a 9×39 mm bullet. The tested automatic weapon systems were realized at 100 m under standard conditions, with the appropriate number of shots (ten groups of ten shots each with identical ammunition). The emphasis during the testing was on measuring the muzzle velocity, accuracy, and precision, according to standard testing methods. The results of experimental tests showed a high level of accuracy and precision and an adequate level of initial velocity values. Based on the conducted comparative analysis of accuracy and precision, the possibilities of use in the implementation of tactical tasks in urban environments for the proposed concept of an improved modular system on the AM20 platform were given.

In this paper, we perform a theoretical study of the possible improvement of the absorption properties ( ) of the sample consisting of Fe3O4/C hollow sphere nanoparticles, prepared by sol-gel method. In order to achieve proposed goal, we examine the impact of the phase transformation of the sample, occurred during the annealing treatment. It was found that the presence of the Fhyd → Fe3O4 phase transformation, occurred during the thermal treatment process, decreases the absorption power of the final synthesis product. Accordingly, we considered ways to mitigate the effects of phase transformation as a mean of improving absorption efficiency. For this purpose, we propose a theoretical framework that relies on a simple quantum mechanical Hamiltonian. We suggest that the absence of the Fhyd → Fe3O4phase transformation, could improve the absorption properties of the final sample (Fe3O4/C).

In this paper, an optimization method for a rocket-refurbishing project is presented. While considering the technical solution the level of reconstruction needs to be decided, from which refurbishment costs are dependent, as well as eventual increase of rocket performances. The idea of rocket motor refurbishment is to extend the life cycle and eventually increase performances for a minimum of an investment. The design shown in this paper is supposed to be an economic solution for the M63 "PLAMEN" 128 mm caliber artillery rocket, resulting in the increase in performance, without significant changes to the construction.

The Military Technical Institute (MTI) is the largest military scientific and research institution in the Republic of Serbia. It mainly realizes its supply chain from the approved budget funds of the Republic of Serbia, while a smaller part is realized from its own revenues. Her continuous work to improve non-financial performance within the supply chain as well as motivate employees to manage their supply chain integration (SCI) initiatives requires intellectual capital (IC) tracking and reporting. Analysis and reporting on IC in MTI can be done within the human, organizational and social dimensions of IC. This paper will examine the role of IC reporting and examine its impact on SCI in MTI. The aim of the paper is to determine that the monitoring and reporting of IC affects the process of SCI in MTI.

The track quality measuring by the track probability existence in order to determine the limits of the possibility of effective target tracking is present in this paper. The most known algorithms for radar target tracking do not have tools to measure track quality. There is no valid procedure that guarantees the verification of the optimal algorithm for a specific application in targets tracking. Standard Integrated Track Splitting (ITS) is the efficient, fully automatic multi target tracking algorithm with initialization, maintenance and deletion tracks and is well-known single and multi target tracking algorithm, also proposed for the purpose of testing the limits of successful tracking. The paper allows the user to choose optimal parameter by the proposed parameters - thresholds of confirmed and false tracks in order to achieve better false track discrimination (FTD). In particular, a diagram of RMSE position errors is also given in the comparison of the proposed algorithm.

The paper presents a numerical analysis, using the finite element method, for the case of static and dynamic loading of the upper carriage of the remote-controlled combat station, due to the recoil force generated by the operation of the integrated automatic grenade launcher 30mm M93. The paper describes the problem of integrating the BGA 30mm M93 automatic grenade launcher onto the combat platform, and based on the dimensions of the automatic launcher, modeling of the automatic launcher stand with cradle was carried out. As a result of the weapon dynamics equations and internal ballistics calculations, the pressure force of the gunpowder gases and the recoil force of the automatic grenade launcher were calculated. The paper also presents the results of the dynamic analysis of the finite element model of the upper gun carriage loaded with the obtained impulse recoil force for different elevation angles of the weapon.

Public company "Nuclear Facilities of Serbia" is the only operator of nuclear facilities and holder of licenses to perform nuclear activities in the country. By the current legislation, environmental radiation monitoring in the vicinity of nuclear facilities is performed to assess the level and control the external exposure of the population and environment to ionizing radiation due to the operation of nuclear facilities. This paper presents an overview of the representative environmental radiation monitoring results regarding radioactive contamination level and ambient gamma dose rate equivalent in air and precipitation for the year 2021. The obtained results show that there is no adverse influence on the population and environment and the radiation risk for individuals in the population is negligible.

The efficiency of the weapon system has been usually studied by altering the guidance and control or aerodynamics of the missile. This research investigated methods of enhancing the efficiency of the weapon system against soft targets based on the fragmentation warhead design. Different warhead geometric configurations, initiation points, as well as premade fragment material and shapes have been studied to enhance overall weapon efficiency against soft target. The study considered the static fragment distribution and velocity as the base for the analysis. A new vulnerability code has been developed based on the mean area of effectiveness to prove the study using both simulations and field tests. There were significant improvements on the weapon efficiency by altering the warhead parameters. The simulated results showed good correspondence with the test results. The newly developed vulnerability code can be considered as an additional system engineering analysis tool for the calculations of weapon efficiency.

This paper discusses the theoretical foundations and definitions of controlling and internal auditing as tools that help the organisation's management in managing business compliance and business continuity, with the purpose of meeting the organisation's objectives, by assessing the effectiveness of risk management inside the organisation, as well as of control and management. Considering the contemporary trends in organisational management, where the management is faced with frequent crises that require rapid and comprehensive action and response to risks, where internal auditing information is focused on the past, there is a need to implement controlling in organisations to provide help to the management for the future. The aim of this paper is to highlight the need to introduce controlling at the Ministry of Defence in order to improve the work of this organisation and to provide strong support in preventing the existing problems and to develop innovative systems of solutions that go beyond mere financial reporting.

This paper presents modeling, simulations and control of the ground-to-air missile fin actuation system, where brushed DC motors are used as actuators, which are driven using voltage regulation-Pulse Width Modulation (PWM). The mathematical model of the system was determined using the differential equations of behavior of the lowest order that was experimentally confirmed. This model was taken as a starting point in the synthesis of the Lead compensator, used to regulate the position of the missile's control surfaces. The trial and error method was used for the synthesis of Lead compensator, taking care to meet the required characteristics of the System, in form of bandwidth and gain. The improved transient process and behavior of the System have also been experimentally confirmed.