• 대한원격탐사학회지
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• 제35권1호
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• pp.39-55
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• 2019

In this study, we have proposed an improved method to detect forest fires by correcting the reflected signals of day images using the middle-wavelength infrared (MWIR) channel. The proposed method is allowed to remove the reflected signals only using the image itself without an existing data source such as a land-cover map or atmospheric data. It includes the processing steps for calculating a solar-reflected signal such as 1) a simple correction model of the atmospheric transmittance for the MWIR channel and 2) calculating the image-based reflectance. We tested the performance of the method using the MODIS product. When compared to the conventional MODIS fire detection algorithm (MOD14 collection 6), the total number of detected fires was improved by approximately 17%. Most of all, the detection of fires improved by approximately 30% in the high reflection areas of the images. Moreover, the false alarm caused by artificial objects was clearly reduced and a confidence level analysis of the undetected fires showed that the proposed method had much better performance. The proposed method would be applicable to most satellite sensors with MWIR and thermal infrared channels. Especially for geostationary satellites such as GOES-R, HIMAWARI-8/9 and GeoKompsat-2A, the short acquisition time would greatly improve the performance of the proposed fire detection algorithm because reflected signals in the geostationary satellite images frequently vary according to solar zenith angle.

• 한국항만경제학회지
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• 제35권1호
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• pp.1-18
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• 2019

SOC 투자를 위한 경제성 평가에서 벌크화물의 시간가치를 반영해야 하는지에 관한 논의가 지속되고 있다. 본 연구는 벌크화물의 시간가치 반영을 위해 검토해야 할 기본 사항들을 제시하는 목적으로 수행하였다. 연구의 내용은 우선 외국의 반영 현황과 관련 연구사례 및 국내 적용 시 한계점 등을 파악하였다. 벌크화물의 시간가치 반영 방법은 국가별로 다르며 반영의 강도 역시 차이가 나타났다. 또한 운송수단 선택모형을 통해 도출한 시간가치를 반영하는 것도 아직 논란이 예상되었다. 본 연구는 이러한 한계들을 감안하여 향후 시간가치 반영을 위한 기초환경 구축 방향을 제시하였다. 벌크화물 시간가치 반영은 필요성이 충분히 인정되지만 실제 적용하기까지는 선제적으로 검토하고 해결해야 할 사항들이 있다고 판단된다. 이를 보완하기 위해 후속연구가 지속될 필요가 있으며, 이를 통해 보다 명확한 가이드라인이 마련되기를 기대한다.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제33권2호
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• pp.141-161
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• 2019

본 연구의 목적은 사회정의를 위한 수학교육의 국내외 연구 동향을 알아보고 우리나라 수학교육에 주는 시사점을 제시하는 것이다. 본 연구에서는 사회정의를 위한 수학교육에 대한 국내외 연구 동향을 알아보기 위하여 선행 연구들을 분석하였다. 연구결과, 사회정의에 대한 국외의 연구는 1960년대 말부터 Freire의 비판적 수학교육부터 시작하여 다양한 관점에서 연구가 활발하게 진행되어 오고 있고, 국내에서는 2000년대에 들어서면서 비판교육을 시작으로 최근에는 현장 교사들을 중심으로 자신들의 수학수업에 사회정의를 위한 수학을 적용하는 연구가 주류를 이루고 있음을 밝히고 있다. 현재의 우리나라 입시 등 교육 체제에서 적용이 쉽지 않음을 지적하면서 사회정의를 위한 수학교육이 우리의 수학교육에 주는 시사점을 다음과 같이 제시하고 있다. 사회정의를 위한 수학교육은 전통적인 수학 수업에 대한 반성의 기회를 제공하고, 인문학적 관점에서 통합과 융합적 접근을 가능하게 한다고 주장한다. 또한, 학생들에게 수학에 대한 긍정적인 태도를 가지도록 하며, 교사나 학생들에게 수학과 세상을 보는 관점을 보다 넓고 깊게 할 수 있는 기회를 제공할 수 있다고 설명한다.

• 문화기술의 융합
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• 제7권1호
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• pp.82-91
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• 2021

이 연구는 자격과 장애인평생교육 지원체제 개발의 융합 타당성을 확보하기 위한 전제조건을 탐색하는 데 목적을 두었다. 연구 방법은 선행 연구문헌의 수집 및 분석과 전문가 회의를 병행하는 절차로 구성되었다. 연구 내용은 현행 추진 장애인평생교육 전문인력 자격화제도의 한계와 반성을 문제를 기반으로 하여 장애인평생교육 학적토대 및 정의체계 구축, 장애인평생교육 교육과정 개발 및 운영의 전문역량 경력개발경로 설계, 장애인평생교육 교육과정 기반의 유관기관 재구조화, 장애인평생교육 전문인력 양성 자격 유형 고도화를 모색하는 것으로 제시되었다. 연구 결과, 장애인평생교육 지원체제 개발이란 종합 범주에서 자격의 가치와 기능이 아주 중요하다는 측면을 비롯하여 결론적으로 장애인평생교육 전문인력 양성을 위한 대학기반화 관점과 적용모델이 검토되어야 한다는 측면이 분석되었다.

• Earthquakes and Structures
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• 제20권2호
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• pp.187-200
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• 2021

The main factor for the amplification of ground motions near the crest or the toe of a slope is the reflection of the incident waves. The effects of the slope topography on the surrounding lands over the crest or at the toe can amplify the seismic responses of buildings. This study investigates the seismic performance of the slope topography and three mid-rise buildings (five, ten, and fifteen-storey) located near the crest and toe of the slope by 3D numerical analysis. The nonlinear model was used to represent the real behavior of building and ground elements. The average results of seven records were used in the investigations. Based on the analysis, the amplification factor of acceleration near the crest and toe of the slope was the most effective at distances of 2.5 and 1.3 times the slope height, respectively. Accordingly, the seismic performance of buildings was studied at a distance equal to the height of the slope from the crest and toe. The seismic response results of buildings showed that the slope topography to have little impact on up to five-storey buildings located near the crest. Taking into account a topography-soil-structure interaction system increases the storey displacement and base shear in the building. Accordingly, in topography-soil-structure interaction analyses, the maximum lateral displacement was increased by 71% and 29% in ten and fifteen-storey buildings, respectively, compare to the soil-structure interaction system. Further, the base shear force was increased by 109% and 78% in these buildings relative to soil-structure interaction analyses.

• 한국산학기술학회논문지
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• 제22권2호
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• pp.311-318
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• 2021

수중에서는 공기 중에서의 신호 전달과는 달리 음파에 의해 신호가 전달된다. 또한 음파는 해수면, 해저면, 수온, 염분 등 다양하고, 복잡한 수중 환경 특성으로 인해 직접 혹은 반사 등의 간접 경로로 전달된다. 이런 복잡한 수중 환경에서 잠수함의 생존성과 적 함정으로부터 피탐 위험성의 정도를 파악하기 위해 반드시 수행하는 시험이 수중방사 소음 측정 시험이다. 수중방사 소음 측정을 위한 여러 조건들 중 가장 중요한 것이 측정 센서와 잠수함과의 거리이다. 보통 수중방사 소음의 음원 준위 측정은 측정 센서와 잠수함과의 최근접 점(CPA : Closet Point of Approach) ±수 미터내에서 이루어져야 측정한 음원 준위 값을 유효한 것으로 간주한다. 이에 본 연구에서는 다중 경로 신호들의 도플러 천이 주파수 및 다른 도달 시간 차 신호를 추정하는 방법으로 수중음원에 대한 거리 추정 방법을 제시하였다. 제안한 방법의 타당성을 고찰하기 위해 수중 채널 전달 모델 기반의 모의실험을 수행하였다.

• 산업경영시스템학회지
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• 제44권4호
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• pp.43-52
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• 2021

In weapon assignment studies to defend against threats such as ballistic missiles and long range artillery, threat assessment was partially lacking in analysis of various threat attributes, and considering the threat characteristics of warheads, which are difficult to judge in the early flight stages, it is very important to apply more reliable optimal solutions than approximate solution using LP model, Meta heuristics Genetic Algorithm, Tabu search and Particle swarm optimization etc. Our studies suggest Generic Rule based threat evaluation and weapon assignment algorithm in the basis of various attributes of threats. First job of studies analyzes information on Various attributes such as the type of target, Flight trajectory and flight time, range and intercept altitude of the intercept system, etc. Second job of studies propose Rule based threat evaluation and weapon assignment algorithm were applied to obtain a more reliable solution by reflection the importance of the interception system. It analyzes ballistic missiles and long-range artillery was assigned to multiple intercept system by real time threat assessment reflecting various threat information. The results of this study are provided reliable solution for Weapon Assignment problem as well as considered to be applicable to establishing a missile and long range artillery defense system.

• International Journal of Computer Science & Network Security
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• 제22권8호
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• pp.299-303
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• 2022

The article examines the stage of verification of a crime report from the standpoint of the need for its legislative regulation. Moreover, it investigates the international experience in this field. The existing procedural models are described in detail on the example of the neighboring and faraway countries. An analysis of the provisions of the current criminal procedure law of Russia and foreign experience allowed the authors to identify existing problems in the implementation of departmental control and prosecutorial supervision at the stage of verifying a crime report. The aim of the study is to develop theoretical provisions and recommendations regarding the implementation of departmental procedural control and prosecutorial supervision over the activities of the investigator during the verification of reports of crimes, based on the study of experience, both in Russia and in a number of countries of the near and far abroad, which could find their reflection in law enforcement practice, as well as aimed at improving the current criminal procedure legislation. The authors substantiated the theory that a detailed examination of the foreign procedural foundations of checking a crime report will allow us to form the most suitable model for checking a crime report for our state, taking into account all possible features and successfully implement it into the current criminal procedural law of the Russian Federation.

• 한국간호교육학회지
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• 제28권3호
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• pp.223-235
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• 2022

Purpose: This study aimed to explore nursing students' experience with community-linked nursing education programs. Methods: This study utilized a qualitative content analysis. Participants were 55 sophomore nursing students. The community-linked nursing education program was conducted for eight weeks using the Analysis, Design, Development, Implementation, Evolution (ADDIE) model. Data were collected from 55 reflection records and five individual interviews and then analyzed through the three steps of qualitative content analysis, coding, condensing, and categorizing. Results: Twelve categories, 26 subcategories, and six topics emerged. The themes of impression and lesson from the community-linked nursing education programs were "recognizing the importance of professional competence in performing the role of nurse," "recognizing the need for leadership and cooperation in nursing practice," and "increased awareness of the role as a nursing professional for community residents." The themes of the strategies used were "looking at the goal and moving forward," and "aligning differences and working together with team/community members." The theme of strategies for the advancement of community-linked nursing education programs was "establishing a sustainable student-participating community-linked education program." Conclusion: The community-linked nursing education programs made students aware of the necessary competencies as professionals. In particular, they gave them hope for their role as professional nurses in the community. It could also be seen that they developed the ability to engage in team activities for community activities. Community-linked nursing education programs will need to be developed into continuous programs with community residents.

• International Journal of Advanced Culture Technology
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• 제11권3호
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• pp.277-296
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• 2023

The South Korean ethnic diaspora US lobby shows efficacy as an interest group in generating influence in American foreign and domestic public policy making. The persuasive portrayal of South Korea as a critical Cold War US ally reinforced US amenability to pro-South Korea lobbying. Also, the South Korean US diaspora is a comparatively recent immigrant group, thus its lingering resistance to assimilation facilitates its political mobilization to lobby the US government. One source of this influence includes the foundational legacy of proselytizing Western and particularly American religious social movement representatives in Korean religiosity and society. US protestant Christianity acquired a strong public association with emerging Korean nationalism in response to Japanese imperialism and occupation. Hostility towards Japanese colonialism followed by the threat from Soviet-sponsored, North Korean Communism meant Christianity did not readily become a cultural symbol of excessive external, US interference in South Korean society by South Korean public opinion. The post-Cold War shift in US foreign policy towards targeting so-called rogue state vestiges of the Cold War including North Korea enhanced further South Korea's influence in Washington. Due to essential differences in the perceived historical role of American influence, extrapolation of the South Korean development model is problematic. US hegemony in South Korea indicates that perceived alliance with national self-determination constitutes the core of soft power appeal. Civilizational appeal per se in the form of religious beliefs are not critically significant in promoting American polity influence in target polities in South Korea or, comparatively, in the Middle East. The United States is a perceived opponent of pan-Arab nationalism which has trended towards populist Islamic religious symbolism with the failure of secular nationalism. The pronounced component of evangelical Christianity in American core community nationalism which the Trump campaign exploited is a reflection of this orientation in the US.