• Journal of the military operations research society of Korea
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• v.33 no.1
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• pp.105-115
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• 2007

It is essential to give a fatal damage to the enemy force by using prompt and accurate fire in order to overcome the lack of artillery force. During the artillery fire operations, minimizing the firing time will secure the adapt ability in tactical operation. In this paper, we developed a mathematical model to schedule the artillery fire on the multiple targets to decrease total fire operation time. To design a program to describe a real firing situation, we consider many possible circumstances of changes such as commander's intention, firing constraints, target priority, and contingency plan to make a fire plan in an artillery unit. In order to work out the target sequencing problem, MIP is developed and the optimum solution is obtained by using ILOG OPL. If this analytical model is applied to a field artillery unit, it will improve the efficiency of the artillery fire force operations.

• Journal of Advanced Navigation Technology
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• v.22 no.2
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• pp.105-110
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• 2018

The North Korea nuclear issue is now posing a serious security threat to the Korea and Northeast Asia. Accordingly, the South Korean military is pushing for the introduction of long-range air-to-surface flights and the development of domestic nuclear facilities that can precisely hit North Korea headquarters building and nuclear facility even hundreds of kilometers above the border. In this paper, we removed the cable braid for securing the weight of the missile among several design elements for long-range air-to-surface missile development and estimated and analyzed the resulting performance. The possibility of braid removal was analyzed in terms of crosstalk inside the cable and CS114, RE101 of MIL-STD-461F.

• (The)Study of the Eastern Classic
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• no.41
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• pp.275-301
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• 2010

Confucius made endless thoughts on such themes as enlightening for the internal value of human, how to draw out such value and how to make personal relationship in order to overcome the chaotic Chun-qiu age. The spirit of 'Harmony but not Sameness' stated by Confucius passes us the theoretical meaning for making a good relationship with the others, which is realization of Benevolence. The spirit of 'Harmony but not Sameness' pursues moral, public and golden-mean value. This pursuit is made to look for harmonization and coexistence in personal relation, community based relation and, furthermore, relation with the nature, so that a great man is an entirely-good person who has realized the spirit of 'Harmony but not Sameness'. The spirit of 'Harmony but not Sameness' throws to us many issues to think of for the social unity, 'living together', which is the central theme of today. The objects for which the 'living together' shall be embodied are the minor groups of our society and those who are relatively expelled from the power and benefit including multi-culture based families, north Korean refugees and etc. Such open mind for harmonization and coexistence gives us, furthermore, another important issue to think of also in the matter of environment that includes the ecosystem and the entire nature.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.123-123
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• 2023

하천이 바다와 만나는 하구(河口, estuary)지역은 조위의 영향을 강하게 받아 하천 수위의 낙폭이 크고, 하상(河床)의 변동 또한 심하다. 때문에 이러한 감조구간은 홍수위 산정에 있어서도 일반하천에 비해 보다 세심한 주의가 요구된다. 우리나라 4대강 중 한강을 제외한 낙동강, 금강 및 영산강은 하구언 설치로 인해 이미 하구로서의 기능을 상실한 상황이다. 반면 한강 하류 구간은 북한과의 접경지역이라는 지리적, 상황적 특수성으로 인해 하구언 설치가 불가능하였기에 지금까지 감조상태를 유지하고 있다(Park and Baek, 2017). 지금까지 계획홍수위 산정시 일반하천이든 감조하천이든 간에 그 고유의 특성을 고려치 않고 정상-부등류(steady-nonuniform flow) 모의를 하는 것이 일반적인 관례이었다. 하지만 2018년 개정된 하천설계기준에 따르면 감조하천 구간에서는 반드시 부정류(unsteady flow) 모의를 수행하도록 규정하고 있다. 이에 따라 2020년 고시된 한강(팔당댐~하구) 하천기본계획(변경) 보고서에는 부정류해석을 통한 홍수위 산정분이 수록되어 있다. 문제는 "한강하구는 서해조석의 영향을 받는 감조하천이기는 하나 계획홍수량 유하시 한강에 미치는 조위의 영향은 미미하므로..."라는 결론을 도출하면서 부정류해석 결과 대신 부등류해석 결과를 계획홍수위로 결정했다는 것이다. 본 연구에서는 한강의 종점 유도지점을 기점으로 조석을 하류단 경계조건으로 부여하는 부정류 해석을 수행하여 한강하천기본계획(2020)의 홍수위와 비교하였다. 그 결과 본 연구에서 산정한 홍수위가 하구에서부터 신곡수중보 하류구간까지는 하천기본계획의 그것과 상당한 차이를 보였다. 한강하류 구간은 계획홍수량 발생시에도 조석의 영향을 받는 감조구간이므로 고시된 계획홍수위의 재검토가 필요해 보인다.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.350-350
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• 2022

R은 통계 및 빅데이터 분석에 널리 사용되는 오픈 소스 프로그래밍 언어로, 통계와 그래픽스에 관련된 기능을 확정할 수 있어 다양한 분야에 활용되고 있다. 특히, 수자원 분야의 연구에서 그 활용이 늘어나고 있으며, 최근 들어 다양한 수자원 관련 R 패키지가 발표되고 있다. 이중, 미국 지질조사국(U.S. Geological Survey, USGS)이 개발한 EGRET은 수질 및 유출량 자료의 장기 추세 변화 분석을 위한 패키지로 R 프로그래밍 언어를 기반으로 구동되며, 분석·처리한 데이터에 대하여 광범위한 그래픽 프리젠테이션을 제공하여 탐색적 자료 분석에 매우 효과적인 도구이다. 특히, EGRET 패키지는 농도와 유출 사이의 관계 특성, 수집된 자료의 계절성 존재 및 특성, 점진적 또는 급격한 경향의 존재를 검토할 수 있는 그래픽 결과를 제시하며, 가중 회귀(Weighted Regressions on Time, Discharge, and Season, 이하 WRTDS) 모델을 적용하여 농도와 부하의 상태와 경향을 특성화한다. 시간, 유량 및 계절에 대한 WRTDS 모델은 농도 및 부하의 상태와 경향을 특성화하는 데 사용할 수 있는 수질 데이터 세트의 분석 방법으로, 근본적으로 탐색적 데이터 분석 방법으로 다양한 유형의 트렌드 시나리오에 민감하도록 설계되었으며 선형 또는 2차 함수형에 맞지 않을 수 있는 시간적 추세를 탐지하여 설명할 수 있고, 불규칙한 간격의 자료를 사용하기에 적합한 장점이 있다. 본 연구에서는 북한강 상류의 지속적인 흙탕물 발생으로 문제가 되고 있는 자운지구의 자운천을 대상으로 흙탕물 발생 현황을 분석하기 R을 이용하여 탐색적 자료 분석을 실시하였다. 자료 분석은 EGRET 패키지를 사용하여 수집된 자료(2016년 4월 - 2021년 7월까지 수집된 191개의 SS 자료와 인근 유량측정망의 유량자료)의 유량과 SS 농도 간의 관계, 시간에 따른 SS 농도 분포, SS 농도의 월별 특성 분석 및 유황별 SS 농도 변화 등을 검토하였으며, WRTDS 모델로 SS와 부하량을 예측하고 검토하여 자운천 유역의 흙탕물 부하 특성을 검토하였다.

• Convergence Security Journal
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• v.23 no.4
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• pp.81-92
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• 2023

In recent years, the ROK military is promoting Defense Innovation 4.0 with the goal of fostering strong military based on science and technology equipped with artificial intelligence(AI) to prepare for the upcoming population cliff. In particular, at the present time of increased threats of North Korea, the South Korean military is seeking to deal with a decrease in military service resources through the introduction of a Scientific Guard System using advanced technology. TICN which is a core basic communication system to ensure the integrated combat capability of the ROK military is, however, limited to use as a based network for the emerging Scientific Guard System due to the narrow transmission bandwidth with widely spread poor reception area. To deal with this problem, this paper proposes TVWS-based Scientific Guard Systems with TVWS-based wireless network construction technology that has been available for free in Korea since 2017. The TVWS-based Scientific Guard System proposed in this paper, when compared to the existing wired network-based Scientific Guard Systems, has various advantages in terms of minimizing operational gaps, reducing construction costs, and flexibility in installation and operation.

• The Journal of the Convergence on Culture Technology
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• v.10 no.3
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• pp.31-35
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• 2024

On October 7, 2023, Hamas launched a large-scale surprise attack against Israel and war broke out. On this day, in addition to supplying rockets, they directly invaded Israeli territory in multiple areas using parariders and motorcycles. Considering the security situation on the Korean Peninsula, it is meaningful to consider why Israel allowed Hamas to attack and why it failed to deter the war in advance. Deterrence can only be successful if it is supported by capability, will, communication, and credibility. Although the capability and will were sufficient, and the communication through punitive deterrence had been sufficiently communicated, the failure to deter this war was problematic in terms of credibility. In order to increase deterrence against North Korea's threat, we need to improve customized extended deterrence, convey the will of both Korea and the United States to deter, and increase credibility in deterrence capabilities and execution ability.

• The Journal of the Convergence on Culture Technology
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• v.10 no.4
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• pp.105-109
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• 2024

This study analyzes the increasingly severe issue of recruiting military officer personnel due to low birth rates and social changes, and seeks to explore recruitment strategies that consider the characteristics of the MZ generation. The military strives to maintain security amidst ongoing military threats from North Korea, but the sharp decline in birth rates significantly impacts conscription resources and personnel recruitment. Additionally, the shift in values among the MZ generation and the cultural gap between them and the military organization make it challenging to attract outstanding talents. The MZ generation values work-life balance, horizontal relationships, and self-fulfillment, finding the authoritative and hierarchical military culture unattractive. Therefore, this study aims to diagnose the problems in military personnel recruitment and propose tailored recruitment strategies reflecting the characteristics of the MZ generation, ultimately exploring sustainable development directions for the future military.

• Korean Security Journal
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• no.48
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• pp.259-285
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• 2016

As the need for anti-terrorism legislation has been continuously argued, Anti-terrorism act has been enacted and enforced. On the other hand, there still remain a lot of points to be discussed regarding the definition of the concept of terrorism, matters of human rights violations, strengthening authority of the investigation and intelligence agencies, and mobilization military forces for the suppression of terrorism. Also, reviewing Anti-terrorism act and its enforcement ordinance draft, this legislation seems to regulate terrorist groups like IS. If so, in the case of terrorism of North Korea or domestic anti-government organizations, whether this law would be applied could become an issue. In the case of terrorism of North Korea, Ministry of National Defense has a right of commandership in the military operations, however, it is also possible to apply the article 4 of Natural Security Act a crime of performing objective-or a crime of foreign exchange on Criminal law as legal grounds for not military terrorisms but general investigations. Therefore, it is necessary to involve consideration about this matter. Furthermore, in the view of investigation, Anti-terrorism act and its enforcement ordinance draft do not mention Supreme Prosecutors Office and Ministry of Justice that conduct investigations. In the case of terrorism, the police and prosecution should conduct to arrest criminals and determine crimes at the investigation stage, however, any explicit article related to this content in Anti-terrorism act and its enforcement ordinance draft was unable to be found. Although Anti-terrorism act is certainly toward preventive aspects, considering some matters such as prevention, actions on the scene, maneuver after terrorism, arresting terrorists, investigation direction, cooperation, and mutual assistance, it is necessary to reflect these contents in Anti-terrorism act. In other words, immediately after terrorists attacks, it is possible to mobilize the military operations by Integrated Defense act in order to arrest them in the case of military terrorism. Nevertheless, because both military terrorism and general one are included in the investigation stage, it needs to begin an investigation under the direction of the prosecution. Therefore, above all, a device for finding out the truth behind the case at the investigation stage is not reflected in the current Anti-terrorism act and its enforcement ordinance draft. Accordingly, if National Intelligence Service approaches information at the prevention level in this situation, it may be necessary to come up with follow-up measures of the police, the prosecution, and military units.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.9
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• pp.24-33
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• 2017

Multitemporal MODIS vegetation index (VI) data are widely used in vegetation monitoring research into environmental and climate change, since they provide a profile of vegetation activity. However, MODIS data inevitably contain disturbances caused by the presence of clouds, atmospheric variability, and instrument problems, which impede the analysis of the NDVI time series data and limit its application utility. For this reason, preprocessing to reduce the noise and reconstruct high-quality temporal data streams is required for VI analysis. In this study, a data reconstruction method for MODIS NDVI is proposed to restore bad or missing data based on the statistical properties of the oscillations in the NDVI temporal dynamics. The first derivatives enable us to examine the monotonic properties of a function in the data stream and to detect anomalous changes, such as sudden spikes and drops. In this approach, only noisy data are corrected, while the other data are left intact to preserve the detailed temporal dynamics for further VI analysis. The proposed method was successfully tested and evaluated with simulated data and NDVI time series data covering Baekdu Mountain, located in the northern part of North Korea, over the period of interest from 2006 to 2012. The results show that it can be effectively employed as a preprocessing method for data reconstruction in MODIS NDVI analysis.