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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korea Institute of Military Science and Technology
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The Korea Institute of Military Science and Technology
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Volume & Issues
Volume 13, Issue 6 - Dec 2010
Volume 13, Issue 5 - Oct 2010
Volume 13, Issue 4 - Aug 2010
Volume 13, Issue 3 - May 2010
Volume 13, Issue 2 - Apr 2010
Volume 13, Issue 1 - Jan 2010
Selecting the target year
A Weapon Assignment Algorithm Using the Munkres Optimal Assignment Method
Kim, Ji-Eun ; Shin, Jin-Hwa ; Cho, Kil-Seok ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 1~8
This paper presents global and optimal solution for weapon assignment problems using the Munkres assignment algorithm. We propose a new modeling method of weapon assignment problems concerning some constraints of weapon systems. In this paper, we compares the Munkres weapon assignment algorithm with two other algorithms employing a search tree model in terms of computational complexity and performance. One is an optimal algorithm using exhausted search and the other is a greedy algorithm which selects the first search result as a solution. The experiment results show that the Munkres weapon assignment algorithm has better performance and less computational complexity in comparison with the two other algorithms.
Design and Performance Analysis of Energy-Aware Distributed Detection Systems with Multiple Passive Sonar Sensors
Kim, Song-Geun ; Hong, Sun-Mog ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 9~21
In this paper, optimum design of distributed detection is considered for a parallel sensor network system consisting of a fusion center and multiple passive sonar nodes. Nonrandom fusion rules are employed as the fusion rules of the sensor network. For the nonrandom fusion rules, it is shown that a threshold rule of each sensor node has uniformly most powerful properties. Optimum threshold for each sensor is investigated that maximizes the probability of detection under a constraint on energy consumption due to false alarms. It is also investigated through numerical experiments how signal strength, false alarm probability, and the distance between three sensor nodes affect the system detection performances.
Multi-body Dynamics and Structural Vibration Analyses of Smart UAV Ground Test Equipment
Park, Kang-Kyun ; Kim, Dong-Hyun ; Kim, Dong-Man ; Choi, Hyun-Chul ; Ahn, Oh-Sung ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 22~29
In this study, computational multi-body dynamics and structural vibration analyses including some impact condition have been conducted for the ground flight test system of the developed smart UAV model. Designed ground test system has four degree-of-freedom motions with limited motion control mechanism. Design safety margin designs for several structural components are tested and verified considering expected critical motions (pitching and rolling) of the test smart UAV model. Computational results for various analysis conditions are practically presented in detail. Futhermore, proper design modifications of the initially designed test equipment in order to guarantee or increase structural safety have been successfully conducted in the design stage.
A Study of Anti-Jamming Performance using A-NED(Adaptive NED) Algorithm of SFH(Slow Frequency Hopping) Satellite Communication Systems in PBNJ
Kim, Sung-Ho ; Shin, Kwan-Ho ; Kim, Hee-Jung ; Kim, Young-Jae ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 30~35
As of today, Frequency Hopping techniques are widely used for over-channel interference and anti-jamming communication systems. In this paper, analysis the performance of robustness on the focus of some general jamming channel. In FH/SS systems, usually SFH(Slow Frequency Hopping) and FFH(Fast Frequency Hopping) are took up on many special communication systems, the SFH, FFH are also combined with a channel diversity algorithm likes NED(Normalized Envelop Detection), EGC(Equal Gain Combines) and Clipped Combines to overcome jammer's attack. This paper propose Adaptive-NED and shows A-NED will be worked well than the others in the some general jamming environments.
Performance of LOB-based Emitter Localization Using Linear LSE Algorithms
Lee, Joon-Ho ; Kim, Min-Cheol ; Cho, Seong-Woo ; Kim, Sang-Won ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 36~40
In this paper, the well-known LOB-based emitter localization using linear LSE algorithm is numerically implemented and the heuristic guidelines for the parameter values to achieve 1% RMS error are presented. In the simulation, we changed the total observation durations for LOB measurements, time interval between successive LOB measurements and sensor trajectories. The effects of the time interval of LOB measurements, the time duration of the LOB measurements and the angle of flight path arc on the performance are illustrated. The dependence of the performance on the various parameters is investigated and rule-of-thumbs for the parameter values corresponding to 1% RMS error are presented for each simulation condition.
A Hierarchical RAM Simulation Model Framework
Kim, Hye-Lyeong ; Choi, Sang-Yeong ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 41~49
In this paper, we propose a hierarchical RAM simulation model framework which are used to analyze the RAM specifications on the concept refinement phase. The hierarchical RAM simulation model framework consists of RAM simulation models, class library and each model's input and output data lists. The hierarchical RAM simulation models are co-operated with 3 kinds of model - type I, II, III. Type I, II models are used to analyze the target operational availability and Type III is used to establish the initial RAM specifications. Each model's input and output data lists are defined by considering each model's purpose of RAM analysis. The class library is arranged with each model's classes for implementing the hierarchical simulation models. The proposed framework may be applied for executing the RAM activities effectively.
A Study on the Selection of Critical Technology Elements(CTEs) Using Integration Relations between Technologies or Components
Bae, Yoon-Ho ; Choi, Seok-Cheol ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 50~56
Military technology transition is the process of transition from the science and technology environment to systems to supply effective weapon systems and support systems to the fighters. In case of technology transition decision, immatured technologies result in increasing acquisition cost and delaying schedule toward the objective system. In this paper, we proposed a method to identify and select critical technology elements by integration relations between technologies or components, for supporting technology transition and risk management of military R&D projects.
Applications of Capability Evolution Process in the SoS Environment
Song, Sang-Ki ; Kwon, Yong-Soo ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 57~66
This work describes an applications of CEP(Capability Evolution Process) in the SoS(Systems of Systems) environment. SoS is a set of systems that results when independent systems are integrated into a larger systems that delivers unique capability. CEP is focused on system performance and integration, interoperability requirement between systems within a force package. This work analyzes CEP and applies to OO joint marinetime operation. From these results, the possiblity of the CEP application in the SoS environment is presented.
Establishing RAM Requirement based on BCS model for Weapon Systems
Eo, Seong-Phil ; Kim, Sung-Jin ; Kim, Dae-Yong ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 67~76
RAM(Reliability, Availability, Maintainability) characteristics of weapon system is a part of Required Operational Capability, must be reasonable and achievable. In this study, we studied the criteria, important factors to establish RAM requirement and reviewed the current process. Then we propose the new process and method to establish the reasonable and achievable RAM requirement by BCS(Baseline Comparison System) model.
A Study on Outworn Aircraft Management Scheme Using Market Basket Analysis
Jung, Chi-Young ; Lee, Jae-Young ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 77~83
In this paper, we proposed new outworn aircraft management procedure. ROKAF has both good management skill and information system, AMMIS, regarding aircraft maintenance based on all kinds of aircraft's defects. To optimize and secure aircraft's operation, management of the outworn aircraft is very important for ROKAF. With respect to these outworn aircraft's defects and maintenance, we analyzed defects occurrence pattern of outworn aircraft by using AMMIS data and Market Basket Analysis, and found the specified association rules for each defect. By using these association rules, we developed new management procedure for outworn aircraft based on the results of affinity analysis. The management procedure in this paper will also be used to optimal operation and maintenance of other aircraft and weapon systems.
A Study on the Analysis of the Cost-Effectiveness for the New Generation Multiple Launcher Rocket System Using AHP & Parametric Estimating
Cho, Ki-Hong ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 84~90
Korean army currently considers the development of the new generation MLRS(Multiple Launcher Rocket System) as a new alternative, which responses on the renovation of the artillery and future battlefield environment. This study suggests that it presents cost-effectiveness of MLRS based on the Analytic Hierarchy Process and Parametric Estimating(PRICE H). According to this study, the cost-effectiveness of new generation MLRS presented that alternative A is 2.30 times and alternative B is 1.70 times, which are better than currently operating M270A1. Therefore, The best acquisition is alternative A that launcher is carried on currently operating 10ton standard truck but final acquisition alternative should be politically decided to consider viability of operator, performance and the latest of equipment.
A Study on the Demilitarization of the Guided Missile
Cho, Cha-Hyun ; Heo, Wan-Ok ; Yoon, Jung-Hwan ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 91~98
At present, advanced countries are focusing on the study of Demilitarization Method of Conventional Ammunitions. In this paper, we will report the current trends of Demilitarization of Conventional and Guided Missile ammunitions, and present the efficient Demilitarization Methods of new development of Guided Missile ammunitions in Korea.
Analysis of Defense Industry Infrastructure in Fire Power Area Using Multidimensional Preference Analysis
Choi, Myung-Jin ; Lee, Sang-Heon ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 99~104
MDPREF(Multidimensional Preference Analysis) is a program for analysis of preferences. It is what is known as a vector model. This means that the objective of the MDPREF analysis is to identify a perceptual map displaying subject(attribute) vectors. To form the subject vectors visually, lines are drawn from the origin of the plot to each subject point. We analysis the defense industry infrastructure in fire power area by using MDPREF.
Investigation of Applications Technology for High Resolution SAR Images
Yoon, Geun-Won ; Koh, Jin-Woo ; Lee, Yong-Woong ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 105~113
SAR(Synthetic Aperture Radar) has characteristics well-suited for the measurement of geophysical parameters during day and night in all weather conditions. Recently, SAR data with high resolution acquired by satellites became available to the public. In such data, many features and phenomena of geometric structure of man-made objects and natural environments become observable. In this paper, we discuss main considerations including geometric distortion and coregistration for efficient utilization of high resolution SAR images. And, various advanced technologies in SAR application fields are introduced.
Effect of SLS Glass for Bulletproof Materials by Ion Exchange Technique
Kim, Tae-Yoon ; Shim, Gyu-In ; Choi, Se-Young ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 114~119
There are a number of studies on chemically strengthened glass. Most of them are strengthened in molten salt bath below transformation range of glass. This research is distinguished from the aforementioned studies in that single
powder was used by employing screen printing technique. In this study soda-lime-silicate(SLS) glasses for bulletproof glass application with various thicknesses were used. The maximum value of the bending strength is 791MPa heat treated at
, which is about 4.3 times higher than the parent glass, which is the highest strength of all soda-lime glasses. In this study, it is also observed that Vickers hardness increased to
, which is about 15% higher than the parent glass(
) and fracture toughness was not changed. Depth profiles measured by electron probe micro analyzer(EPMA) showed a correlation between the migrations of
ions with bending strength of ion exchanged glasses.
The Effect of Crystallization of SLS Glass for Bulletproof Materials
Shim, Gyu-In ; Kim, Tae-Yoon ; Choi, Se-Young ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 120~125
For application of transparent bulletproof materials, the SLS(soda-lime-silicate) glass was heated by 2-step crystallization. The DTA curve for SLS glass revealed the nucleation and crystal growth temperature at about
, respectively. The crystallized glass was heated at various conditions(temperature, time). As a result, the maximum nucleation and crystal growth rates were
and 20.58nm/min at
, respectively. The bending strength, fracture toughness and vickers hardness were 451.7MPa,
which were 201%, 31%, and 22% higher than parent glass, respectively. Surface image and transmittance of crystallized SLS glass were analyzed by optical microscopy and UV/VIS/NIR spectrophotometer. Transmittance of crystallized SLS glass at visible-range(200~800nm) was not changed.
The Lamb Wave Equation in a Composite Plate with Anisotropy
Rhee, Sang-Ho ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 126~132
A Lamb wave guided by a plate structure has dispersive characteristics because phase and group velocity change with the variation of frequency and thickness. The Lamb wave has two modes, symmetric and anti-symmetric mode, which propagates symmetrically and non-symmetrically with respect to centerline. In this paper, the derivation of Lamb wave equation with anisotropic material property is investigated. The phase velocity and group velocity dispersion curves are shown using the stiffness matrix of composite materials with the variation of angle.
Performance Analysis and Design of Variable Bandwidth Multi-Mode GNSS Receiver for Anti-Jamming
Ahn, Seung-Gwan ; Lee, Sang-Jeong ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 133~139
GNSS receiver which uses the weak satellite signal is very vulnerable to the intentional jamming or non-intentional electromagnetic interference. It is a very simple method among the use method of GNSS receiver to vary tracking loop bandwidth of satellite signal appropriately as the jamming signal level. In this paper, this anti-jamming performance is experimented and analyzed in the laboratory and the anechoic chamber by the GNSS simulator to generate the satellite signal and the jamming signal generator to generate the jamming signal.
The Development of the Multi-function Radar Signal Processor Having the High Spurious Free Dynamic Range
Lee, Hee-Young ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 140~146
The multi-function radar can detect and track the low RCS targets. For this purpose the multi-function radar uses the pulse train waveform. because this waveform has high dynamic range and good SNR(Signal to Noise Ratio). But the spurious signals can also be detected by processing the pulse train waveform. Thus the multi-function radar signal processor must have the high SFDR(Spurious Free Dynamic Range). This paper describes the development of the multi-function radar signal processor having the high SFDR.
Image Classification for Military Application using Public Landcover Map
Hong, Woo-Yong ; Park, Wan-Yong ; Song, Hyeon-Seung ; Jung, Cheol-Hoon ; Eo, Yang-Dam ; Kim, Seong-Joon ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 147~155
Landcover information of access-denied area was extracted from low-medium and high resolution satellite image. Training for supervised classification was performed to refer visually by landcover map which is made and distributed from The Ministry of Environment. The classification result was compared by relating data of FACC land classification system. As we rasterize digital military map with same pixel size of satellite classification, the accuracy test was performed by image to image method. In vegetation case, ancillary data such as NDVI and image for seasons are going to improve accuracy. FACC code of FDB need to recognize the properties which can be automated.
Development and Application of a Nonequilibrium Molecular Dynamics Simulation Method to Study Shock Waves Propagating in Argon Gas
Hwang, Hyon-Seok ; Kwon, Chan-Ho ; Kim, Hong-Lae ; Kim, Seong-Shik ; Park, Min-Kyu ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 156~163
A nonequilibrium molecular dynamics(NEMD) simulation method is developed and applied to study shock waves propagating through argon gas. In this simulation method, shock waves are generated by pushing a piston at a constant speed from one side of a simulation box filled with argon molecules. A linear relationship between piston speeds and shock speeds is observed. Thermodynamic properties including density, temperature, and pressure before and after the shock front are obtained from the simulations and compared with the well-known Rankine-Hugoniot equations based on ideal gases. The comparison shows an excellent agreement, indicating that this NEMD simulation method can be employed to investigate various physical properties of shock waves further.
Analysis and Reconstruction of the 2-D Cylinder Wake Flow Using POD
Rhee, Hui-Nam ; Kim, Gi-Hee ;
Journal of the Korea Institute of Military Science and Technology, volume 13, issue 1, 2010, Pages 164~169
Proper Orthogonal Decomposition (POD) is applied to the analysis of 2-dimensional cylinder wake flow. Time histories of flow variables were obtained by the incompressible CFD analysis. By using the method of snapshots the correlation matrix was constructed, and then eigenvalues, POD modes and time coefficients were calculated. Finally the flow field was reconstructed by using a few of the lower POD modes, and compared to the original ones.