This article examines autonomous reconnaissance in a complex urban environment using unmanned aerial vehicles (UAVs). Environments with many buildings and other types of obstacles and/or an uneven terrain are harder to be explored as occlusion of objects of interest may often occur. First, in this article, the problem of autonomous reconnaissance in a complex urban environment via a swarm of UAVs is formulated. Then, the algorithm based on the metaheuristic approach is proposed for a solution. This solution lies in deploying a number of waypoints in the area of interest to be explored, from which the monitoring is performed, and planning the routes for available UAVs among these waypoints so that the monitored area is as large as possible and the operation as short as possible. In the last part of this article, two types of main experiments based on computer simulations are designed to verify the proposed algorithms. The first type focuses on comparing the results achieved on the benchmark instances with the optimal solutions. The second one presents and discusses the results obtained from a number of scenarios, which are based on typical reconnaissance operations in real environments.

The Czech Republic, as a member of international organizations (NATO, EU, UNO), with respect to current global security neighborhood, employs the units of the army both at its own state territory and outside the Czech Republic, in multinational forces operations. The article focuses on Linear and Angular issues in perspective Artillery Fire Control System called PVNPG-14M. The issue of automated command, control, and information systems is of high importance in the solving of asymmetrical operations tasks today and in the upcoming future. The authors define appropriate Linear and Angular variables for common use by soldiers of the Army of the Czech Republic. Final assessment of the particular issues is determined by analysis. The The article contains theoretical justification and establishes a practical rule for use.

This paper is focused on perspective method for determination fire for effect in tactical and technical control of artillery units in the perspective of automated artillery fire support control system and deals with a proposed method of adjust fire. This method is designed for artillery of these armies that are using the field artillery. Artillery units of the Army of the Czech Republic, reflecting the current global security neighbourhood, can be used outside the Czech Republic. The paper presents problems in the process of adjust fire method, from results arising from creating a fictional auxiliary target; by using an adjustment gun; Abridged preparation and Simplified preparation. The paper compares these methods in terms of time, accuracy (probable error in target distance and target fire direction) and frequency of use in peace and war.

This paper presents a statistical comparison of parallel hourly measurements of particulate matter smaller than 10 $\mathsf{\mu }$m (PM${}_{10}$) from two monitoring stations that are located 560 m from each other in the northern part of Brno City. One monitoring station is located in a park, the other in a built-up area. The authors’ aim is to describe the influence of a built-up area geometry and nearby traffic intensity on modeling of PM${}_{10}$ pollution levels in the respective part of Brno. Furthermore, the purpose of this study is also to examine the influence of meteorological factors on the pollution levels; above all, to assess the influence of wind speed and direction, temperature change, and humidity change. In order to evaluate the obtained data, the following methods of mathematical statistics were applied: descriptive statistics, regression analysis, analysis of variance, and robust statistical tests. According to the results of the Passing–Bablok test, it can be stated that the parallel measurements of PM${}_{10}$ are significantly different. A regression model for PM${}_{10}$ pollution prediction was created and tested in terms of applicability; subsequently, it was used in order to compare measurements from both stations. It shows that in addition to the monitored meteorological factors, pollution levels are influenced mainly by traffic intensity and the geometry of the monitored built-up area.

The service life of machine components exposed to cyclic loading below a yield point is a very significant factor for the assessment of material properties. One of the methods of enhancing material resistance to the initiation and course of a fatigue process is changing the chemical composition of the material surface layer. The paper is concerned with the prolongation of the life cycle of military vehicles machine components by means of a new technology based on the combination of chemical-heat (plasma nitriding) treatment and heat treatment with emphasis put on the increase in the fatigue strength and service life (resistance to corrosion) of originally soft-annealed steel ČSN 412061. The new technology allows reducing the probability of limit state occurrence in a component thus optimising financial means of the Armed Forces of the Czech Republic.