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The quality of requirements specification mainly impacts quality including a system’s reusability and components. Faults in the specification could cause a number of problems in the system development, such as cost and schedule overruns. Therefore, the developer has the ability to determine the specification with completeness, consistency, testability and traceability from vague user requirements. In order to develop a good specification with high reusability, various requirements analysis and specification method have been used by the developers in developing the system. There are two traditional analysis and specification methods, which are Structured Analysis and Use Case Model. There are, however, disadvantages when using these two methods, such as the inadequacy for defense system, data modeling and formalism. These limitations could cause a developer to create poor specifications and systems. To resolve this disadvantage, this paper proposed to combine this approach with the existing methods in order to maximize the advantages of the other methods. This method is called Use-Case Event Modeling. It enables the developer to analyze the user requirements and specify a well defined specification with high productivity and reusability.

The purpose of this study is to investigate factors affecting the use of Army Tactical Command Information System (ATCIS) through the Technology Acceptance Model (TAM). ATCIS has been operated by the Korean Army Corp/Division/Regiment since 2005. TAM represents an important theoretical contribution toward understanding computer usage and computer acceptance behaviors. This study explains the acceptance behavior in military organizations by applying TAM. The external variables were selected on the basis of previous research. The external variables are classified into the following categories: (1) individual factors, which includes computer self-efficacy, (2) organizational factors, which includes the influence of the upper class army and training; and (3) technological factors, which includes information quality. We collected 205 survey questionnaires from Korean army officers and soldiers who use ATCIS and analyzed the data using SPSS 12.0 and SmartPLS 2.0M3. According to the results through PLS analysis, computer self-efficacy, the influence of the upper class army, training, and the information quality was all satisfactory. Perceived usefulness and ease of use were also satisfactory. The results of this study will contribute to the further use of ATCIS and development strategy.

The prototype of Hanhwa AUV (Autonomous Underwater Vehicle) was developed to prepare future system developments in Hanwha Corporation. This paper presents the procedure and results of the structural design and analysis for the End Cap of Hanwha AUV. Several methodologies used for structural optimization were presented and applied to the design of the End Cap structure. Both shape optimization and thickness optimization were performed simultaneously. And because the FEM analysis model was used for structural optimization, design and analysis procedures were simultaneously conducted. Several analysis methods such as static analysis, buckling analysis, and normal mode analysis were used with procedure that was similar to the MDO (Multidisciplinary Design Optimization). The objective is to design the structural weight. The constraints are maximum displacement and maximum von Mises stress in static analysis, the buckling coefficient in buckling analysis, and lowest natural frequency in normal mode analysis. The design variable concerning thickness optimization is the thickness of the End Cap shell, as well as the depth of the End Cap concerning shape optimization. In thickness optimization, the optimization for variable thicknesses at the final shape iteration was performed, and we can see that the weight was significantly reduced.

An award for a contract with the government cannot be decided based only on the lowest price. Government is using a Qualification System (QS) to select the best supplier. However, the weight of evaluation that is used in the QS was assigned without an expert's opinion. The purpose of this paper is to approach the alternative method that aims to weigh evaluation elements. For this purpose, this paper adopts AHP methodology that is being used widely in decision making. So far, a number of papers have reported that AHP is appropriate in making multi-criteria decisions by deriving ratio scales from paired comparisons. Some interesting results were found from this approach. One of the elements, such as contract performance in value, was seven times higher than the current value. To explain the differences between the current weight and the weight determined in this study, this paper uses real data that was evaluated in 2010.This study proposes that QS has to adopt a systematic method like AHP to support its goals In addition, this study is recommending a more efficient process considering the results.

This paper presents efficient guidelines that allow unmanned ground vehicles (UGVs) to avoid obstacles and interpret sensor data, which were executed by an embedded real-time processor for rapid control prototyping (RCP) model using a graphic system design (GSD) programming language. The obstacle avoidance algorithm uses data from laser sensors in order to enable the UGV to make decisions on how to navigate around its environment. Our research control algorithm was implemented on a real-time system, and data were transferred from a real-time processor to a robot. The robot successfully moved towards its goal by pre-making way-points and avoiding arbitrary obstacles by following the newly made way-points using this algorithm. By integrating commercially-available, off-the-shelf hardware and by using GSD program, we greatly improved the repeatability of developing an autonomous robot that drives and plans its own path.

The Korean Government has driven a policy to promote its defense industry since the early 1970’s. Based upon this policy, the defense industry has grown up significantly. The Lee Myungbak Government emphasized the importance of the defense industry, and chose it as a new impetus tool for national economic growth. However, the defense industry has a number of internal problems, which the government plans to solve under the shadows of rapid growth. One way of resolving it is government policy for protecting small business companies. This essentially required more comprehensive policy to protect small business companies in order to strengthen the country’s sound defense industry structure. This study deeply examines government policy towards the protection of small business companies and suggests compensatory policy alternatives to protect small business companies while promoting the defense industry. In addition, this study suggests how to amend related laws and regulations in protecting small business companies in Korea's defense industry. Essentially, a more comprehensive approach is required to protect small business companies in order to strengthen the competitiveness of the country’s defense industry, not only for domestic competency but also international competency.

The developed ADD-acquired technology management system (ATeMS) adopts the auxiliary technology classification criterion (ATCC) onto the existing ones so as to eventually discriminate all other technologies. By means of ATCC, all the ADD technologies are to be independently classified, and subsequently archived in ATeMS database. With the help of ATeMS, one can figure out not only the technology itself but also relevant information, which include data on the project, participants, design software, test and evaluation facilities, technical data package (TDP)s, public journals, intellectual properties and so on. Moreover, this system implemented the circulating search and intelligent report functions, which were newly devised to show a friendlier user interface. The total number of ADD technologies acquired for the past 40 years is about 10,000, which involve weapon systems in general from underwater to aerospace. When applying the ATCC for classification, one can estimate the number of ADD technologies to be around 7,000 to 9,000, all of which are to be eventually archived in the ATeMS. However, there are actually some inevitable limitations because of the absence of index parameters such as project number and technology definitions before 2000. For these reasons, as the first step, we will archive the recent technologies after the creation of DAPA in 2006 in the near future. Here, the details of the ATeMS structure are mainly introduced on the basis of its R&D.

With the maturity of precision manufacturing and fast signal processing technology, FTIR may now be used in an actual open air field. This paper summarized the present technology trend involving remote chemical detection and explained the detection principle of remote chemicals by using the twolayer model of the atmosphere. Since the FTIR for the remote chemicals is based on the measured temperature difference between background and gas, the minimum detection level of temperature difference is the key parameter for evaluating system performance.. The merits of system performance are simulated theoretically from the photoconductive detector noise model. NEDT (Noise Equivalent Differential Temperature), which is dependent on spectral resolution and signal integration time, was used to analyze in order to get the best signal-to-noise ratio. For practical operations, it was determined that a proper trade-off between lowering the NEDT and number of averaging data is necessary. Intermittent correction of output signal is needed from the unavoidable external perturbation of temperature and mechanical vibration. In order to estimate the system's calibration period, the approximated formula of the responsivity variation was derived as a function of the environmental temperature variation from the assumed linear dependence between spectral radiance and instrument output signal.

During the development of electronic warfare support (ES) equipments, it was required to come up with an objective and quantitative test methods in order to verify the performance of an equipment. Although there are a variety of verification methods available, reliable and proven measurement equipments should be used first in order to validate an objective test and assess the developed equipment. In this study, we used a commercial instrument, the Agilent's Pulse Analyzer, to analyze the general performance of an ES equipment. Naturally, commercial instruments have production features that do not support the use of evaluation. Agilent's Pulse Analyzer also has some performance limitations for the use of testing an ES equipment. Because of this, we developed a new software to overcomes the constraints of the Pulse Analyzer. Also, a reliable assessment method is proposed to test the developed ES equipment.

The study of optimal preventive maintenance interval is an important topic primarily because it is an efficient way to maximize operational availability of a weapon system using only small resources. A study of this kind is handled by using simulation methods. In this paper, we propose a modeling method of weapon systems that may be used for optimal preventive maintenance interval and analyzed optimal alternatives. The Modeling and Simulation (M&S) method is quite useful compared with the mathematical approach, since M&S is a stochastic analysis. It considers the randomness of the failure rate, repair time and operation schedule. Using this method, therefore, allows us to achieve more reliable results from other mathematical approaches. First, we analyze the mathematical approach using the existing papers. Second, we introduce a model, called the General Model, which reflects the operational concept and maintenance policies of a general weapon system. It may be customized to fit specific systems. Third, we present a specific case using UAV (Unmanned Aerial Vehicle) system, and customize that model. Finally, we arrive at an optimal solution by simulating that model.

The RWR (Radar Warning Receiver), an Aircraft Survivability Equipment (ASE), is used to detect, analyze, find directions and identify electrical threat signals and threat warning to the operator. Test and Evaluation must to be conducted in order to verify the performance of the RWR system. It is necessary to test and evaluate RWR’s sensitivity, dynamic range, signal type, direction finding accuracy and interface with other systems. Results are evaluated to assess progress in design, performance, supportability, and so on. There are two kinds of Test and Evaluation: Developmental Test and Evaluation (DT&E) and Operational Test and Evaluation (OT&E). DT&E focuses on the technological and engineering aspects of an RWR system, while OT&E is the actual or simulated employment of RWR under realistic operational conditions. The purpose of Test and Evaluation Support Equipment is to determine how well an RWR system works. This article introduces a Test and Evaluation support equipment product design for an RWR system.

Generally, most anti-aircraft middle caliber ammunitions are increasingly tasked to perform various operations, which include overpowering a wide range of targets including aircrafts, lightweight armored vehicles, dense infantry units, bunkers, and buildings. To meet the requirements of the user, the latest research trends for anti-aircraft middle caliber ammunition are to develop high performance air threat systems such as precision-guided munitions and cruise missiles. Several advanced countries have been developing high performance anti-aircraft ammunition that is linked with a radar, laser designator, precision fire control system and fuze setter. The purpose of this review is to propose the future local and international directions of the 3P & AHEAD ammunition and so on.