Introduction/purpose: The paper discusses the selection of the most optimal supplier using the example of an unmanned aircraft when the decision maker has data of a qualitative nature. Problems that arise in practice in the selection of suppliers relate to the selection of adequate criteria as well as the way they are evaluated by the decision maker. One of the ways of assessing the criteria of a qualitative character is the usage of linguistic expressions, which gives decision makers the freedom to express their position and opinion through descriptive assessments. This method of assessment is not the most accurate and can introduce a certain amount of uncertainty for the decision maker. Methods: To solve the problem of uncertainty, the paper proposes a method of modeling data using intuitive phase numbers. Intuitive phase numbers are suitable for solving the problem of uncertainty in situations when it is necessary to review safety during the assessment. To rank suppliers, the ELECTRE method is used, which is adapted to intuitive phase numbers (IF ELECTRE). The IF ELECTRE method was chosen because it clearly presents the potential of all suppliers, i.e. their advantages and disadvantages in relation to the required criteria. Results: Using IF ELECTRE, the final results provide a shape of mutual preference or indifference between suppliers. The ranking clearly shows the potential of all suppliers, which in a future procurement can serve as a reference for decision making. Conclusion: The contribution of this paper is reflected in the proposed model that can be used in practice to solve not only the problem of supplier selection, but also similar problems where the decision is made based on inaccurate data. Using these models seeks to reduce indecision and subjectivity in decision making.

Integration of INS, GPS, Magnetometer and Barometer for Improving Accuracy Navigation of the Vehicle

Introduction/purpose:The paper presents the development of logistics as a specific field of military branch, a contemporary field of business and a scientific discipline which inspires many researchers, theorists and practitioners to approach logistical problems from various aspects. The essence of logistics is an integrated approach to all its constituent activities, which reduces costs and increases the efficiency and effectiveness of the logistics system in supporting the primary activities of an organization or a technical system. Due to intensive and multidimensional development of logistics and its applications in various fields, the need for highly educated logistics personnel with specialized knowledge for performing a wide range of activities in the logistics system is becoming increasingly necessary. Methods: Based on the description of military, business, national and humanitarian logistics and a comparative analysis, their mutual relationship is shown. Results: Based on the performed analysis, an explanation of the importance of studying logistics as a multidisciplinary science and pointing out the need for specific training of logistics personnel was given. Conclusion: Logistics is intensively developing in various fields depending on the goals of the system (organizational and technical) it supports. In general, commercial logistics is evolving faster than military logistics, and many innovative commercial logistics solutions are being deployed in military logistics. However, certain solutions that produce good results in the commercial sector do not produce adequate results in the military. Therefore, it is necessary to carry out research and study of the functioning of logistics systems in different fields and carefully integrate individual solutions into the military logistics system. As the most complex logistics system, military logistics requires specific staffing and training of logistics professionals.

Introduction/purpose: The term Internet of Things (IoT) usually refers to the collective network of connected devices and the technology that facilitates communication between these devices and the cloud, as well as among these devices. The IoT concept is lately considered and applied as the appropriate in design of systems intended for distribution of data and information between heterogeneous devices with the aim to improve efficiency and effectiveness of business and decision making. The IoT enables energy and supply chain monitoring, production coordination, equipment performance optimization, transportation, public health, and improves workers' safety and health. In addition to smart devices, IoT technology also enables the connection of various sensors as a source of data on various physical phenomena, and, based on the information obtained, it is possible to control the operation of devices, make predictions, make decisions, etc. In this paper, specific areas of the application of the IoT in the defense and security sector are analyzed in order to identify the possibilities of applying modern technologies in raising the defense potential of the state and define the directions of future research in the subject area. Methods: The methods of content analysis of current research were applied, and then, with the deductive method, conclusions were reached about the future directions of the development of IoT technology. Results: A detailed analysis of past and ongoing research in the defense and security sector was carried out, and potential directions of future research into the IoT were given in order to increase the operational capabilities of armed forces. Conclusion: IoT services will certainly contribute to a greater degree of automation and improvement of the quality of military decisions on the battlefield, especially in the conditions of unexpected scenarios in an unpredictable hostile environment, thus facilitating the reduction in both human and material losses in operations.

A logistics automated information system should be developed as a part of a unified automated information system (JAIS). In order to develop a logistics automated information system and to apply it successfully in operational use, it is necessary to follow the JAIS global development concept and rely more on teamwork of IT experts and specialists in real logistics systems. An important condition for the development of a high-quality logistics information system is to define information needs for particular objects treated by a logistics information system. The task of such a system is to provide: permanent insight into the logistics system, pointing to the necessary and possible measures for improvement, better real system planning and management activities, personnel information about the state of the real system, pointing to the directions of further system development. A logistics information system should be developed taking also into account compatibility with future allies and partners. Defense systems were among the first to accept the challenge (because they were forced to) to introduce information technology in their management system and, with the help of innovations in this area, to increase the performance effectiveness under the conditions of environment dynamic changes. Information technology development mostly followed development of large military projects aimed at solving management or technology issues within military industry complex and management in the most technologically developed defense systems. These science and defense practice efforts resulted in many new methods and techniques such as the method of system analysis and information system design, methods of operational research and simulation, pattern recognition, expert systems for individual processes in management, as well as those for information retrieval and their implementation in decision making. Over time, partial innovations reached a high level of synthesis, leading to new management systems able to function in most complex task conditions. Mastering the procedure of creating autonomous partial information systems-where the operational research methods helped to optimally apply some of their particular values - has led to the creation of integrated automated information systems for management support. Our recent defense theory and practice have not concentrated enough on logistics information systems in professional journals, neither from the organizational nor from the technological point of view. Experiences gained from operational practice and knowledge acquired by visiting foreign armies, practical needs as well as modern times demands and current trends in the development of defense systems pointed out that it is necessary to pay more attention to this logistics segment in military journals. Logistics information systems cannot be researched, developed and introduced into operational practice (applied) without knowing the structure of high-quality information systems in general. High-quality information systems for supporting the logistic aspects of decision-making and logistics dealing authorities cannot be developed without properly defining information needs of specific customer information systems and without most precisely describing objects of interest of the logistics system. It is also not possible to go forward in the development and implementation of logistics information systems after long stagnation unless this important area is considered through a retrospective, identifying and defining problems that accompany the development and introduction of information systems in the military forerunners of the Army of Serbia and the AS now and realizing the current situation in this area in the defense system. In principle, our defense system started the work on the automated collection, processing and distribution of information simultaneously with other developed defense systems in the world. However, in the meantime orientations and concepts changed so that no project focused on the development of integrated automated information system (AIS) and decision support system was brought completely to the end. The development of information systems to support the defense system and particularly the Army faced specific dilemmas and problems which hindered their development: information needs of users which information systems should provide for were never properly defined; disputes occurred between 'generalities' and 'specialists' on whether the system should be built from the bottom (the base) or from the top, resulting in the development of small-scale applications in the base (where problems needing automation occurred) that could fit into a global concept and the development of global concepts never implemented completely into the defense system operational practice. Due to the low level of their information culture, real system experts were not able to properly express and define their needs and expectations of IT professionals who, because of their low levels of general military knowledge, were not able to fully understand the functioning of the real system and information system needs. The above dilemmas and other problems are still present today so that the present automated decision-making support in the defense system (not just in logistics) does not match the needs of practice, requirements of time and modern trends. In treating logistics information systems in this paper, we will apply an analogy with other information systems. Particular aspects and segments of the development and implementation of logistics information systems will be processed with a high degree of generalization, using the experience and research the authors participated in as well as available sources of knowledge. The aforementioned approach allows for a wider general aspect of the given views, while, on the other hand, gaining the depth and accuracy if validly applied to each specific case and to each...