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한반도 영향태풍 분석을 위한 태풍유형지수 활용 및 사례분석
김건우,정우식,Kim, Gunwoo,Jung, Woo-Sik 한국환경과학회 2021 한국환경과학회지 Vol.30 No.7
This study aimed to classify typhoons using a more objective index based on strong winds and precipitation data from 1904 to 2019 obtained from the Automated Surface Observing System. The Typhoon Type Index (TTI) was calculated by classifying wind speed and precipitation of each typhoon, thereby revealing the rate and characteristics of the wind-type and rain-type typhoons. In addition, the top 10 typhoons for property damage were analyzed by dividing them into three types according to the typhoon course. The analysis showed that typhoons of type 1, heading north to the west coast, were most clearly affected by the wind. In addition, the impact of the wind was reduced and the impact of rain increased in the order of typhoon type 2 that landed on the southern coast and type 6 that affected the Korean Peninsula through China.
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투수층에 적용 가능한 흐름함수방식의 확장형 완경사방정식의 개발
김건우,Kim, Gunwoo 해양환경안전학회 2016 해양환경안전학회지 Vol.22 No.6
In this study, wave damping due to a permeable bed of finite depth was modelled using a complementary mild-slope equation for stream function. The energy dissipating term in the mild-slope equation was presented in terms of stream function. In order to prevent re-reflection of reflected waves along the outer boundary, a delta-function-shaped source function was derived to generate a wave in a computational domain. Numerical experiments were conducted to measure the reflection coefficient of waves over a planar slope for various incident wave periods. The numerical result of the proposed model was compared with that of an integral equation method, showing good agreement in general. However, the proposed model showed relatively higher transmission rate for the larger permeability and the longer wavelength.
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유한요소법을 이용한 type 4 수소저장용기용 고정 장치의 구조적 안전성 분석에 관한 연구
김건우(GUNWOO KIM),김혜원(HYEWON KIM),박한민(HANMIN PARK),이정호(JEONGHO LEE),유수진(SUJIN YOON),이한수(HANSU LEE),김종열(JOUNGLYUL KIM),이석진(SEOKJIN LEE),유계형(GYEHYOUNG YOO),윤영길(YOUNGGIL YOUN),김한상(HANSANG KIM) 한국수소및신에너지학회 2024 한국수소 및 신에너지학회논문집 Vol.35 No.2
The study involves a finite element analysis to evaluate the structural integrity of the neck mount block for a type 4 hydrogen storage vessel, with the aim of enhancing its strength and rigidity. The existing neck mount block consists of a fixed part and a sliding part, each comprising a body block for load support, a screw part for neck boss fixation, and bolts. To analyze the vulnerabilities of the neck mount block under bolt fastening and load conditions relative to vehicle travel directions, a structural analysis process was developed. Comparative analysis between the enhanced design and the existing model was performed, resulting in improved strength and rigidity. The objective is to provide guidance for the current product development and to offer fundamental data for the design and structural analysis of future development projects.
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해석이 아닌 소통을 위하여: 영미문학읽기와 내러티브 기반 수업의 교육적 가능성 탐구
김건우(Gunwoo Kim) 한국영어교육연구학회 2025 영어교육연구 Vol.- No.57
This study explores narrative-based instruction in high school English literature to shift the focus from rote interpretation to authentic communication. Despite the emphasis on student-led learning of the 2022 Revised Curriculum, exam-oriented instruction often hinders emotional engagement. Through a case study of Ursula K. Le Guin’s The Ones Who Walk Away from Omelas, this research demonstrates how narrative activities—such as role-playing and reflective writing— foster immersion and critical thinking. Students successfully connected ethical dilemmas to their personal lives and career aspirations. The paper concludes by advocating for institutional support to integrate literature as an essential tool for developing students’ communicative competence and humanistic values.
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배터리 팩 내부 셀 간 불균형 정도를 평가하기 위한 LOF 기반 파라미터 이상치 추출
김건우(Gunwoo Kim),신승화(Seunghwa Sin),백종복(Jongbok Baek),김종훈(Jonghoon Kim) 전력전자학회 2021 전력전자학술대회 논문집 Vol.2021 No.7
본 논문에서는 데이터 집단의 표본들의 특성을 판단하기 위해 밀도 기반의 이상치 탐지 기법인 Local outlier factor(LOF) 기법을 적용하여 배터리 팩 내부 셀 간 편차를 비교하고 이상치로 진단한다. 제안되는 방법은 배터리의 전기적 등가회로 모델 및 적응제어기법 기반 상태추정 알고리즘을 통해 추정할 수 있는 전압 및 충전 상태(State-of-charge; SOC)를 활용하여 2차원 데이터의 분포를 확인하고, 각 표본들의 상대적인 밀도를 고려한 스코어를 계산하여 이상치임을 확인함으로써 불균형 정도를 진단한다. 제안되는 기법은 불균형 정도를 진단하기 위해 NMC(LiNiMnCoO<sub>2</sub>) 계열의 21700 원통형 배터리가 14S40P로 구성된 배터리 모듈을 통해 실험한다. 검증 결과 각 개별 셀들의 LOF 수치를 SOC 구간에 따라 비교 및 분석함으로써 이상치 여부를 판단할 수 있다.
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