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춘천지역의 천부 횡파속도를 구하기 위한 레일리파 분산곡선 역산
김기영 ( Ki Young Kim ),김우중 ( Woo Jung Kim ),박영환 ( Yeong Hwan Park ) 한국지구물리·물리탐사학회 2012 지구물리와 물리탐사 Vol.15 No.1
To evaluate methods of determining near-surface shear-wave velocities (Vs), we derived dispersion curves of Rayleigh waves generated by both passive and active sources in Chuncheon, Korea. Microtremors were recorded for S minutes in each of four triangular arrays with radii of 5 -40 m. Those data were analyzed using the Spatial Autocorrelation method. Rayleigh waves were also generated by a hammer source and recorded in the same area for 2 s using 24 4.5-Hz geophones. Multichannel Analysis of Surface Waves was applied to those data, Velocity spectra were derived with relatively high signal-to-noise ratios in the frequency ranges of 7- 19 and 11 -50 Hz for the microtremors and synthetically generated Rayleigh waves, respectively. The resultant dispersion curves were combined as one and then input to inversion to derive shear wave velocities that were compared with a lithology log from a nearby well. Shear-wave velocities in the top soil and soft-rock layers are almost constant with values of 221 and 846 m/s, respectively; while the inverse-modeled Vs increases linearly in the gravelly sand, cobbles, and weathered-rock layers. If rock type is classified based on shear-wave velocity, the inversion-derived boundary between weathered-rock and soft rock may be about 5 m deeper than in the well log.
패밀리 레스토랑의 브랜드 심벌이 브랜드 이미지, 선호도 및 구매의도에 미치는 영향
김기영(Ki Yeong Kim),최동희(Dong Hee Choi),이용호(Yong Ho Lee) 한국조리학회 2011 한국조리학회지 Vol.17 No.3
This study is concerned with the effect of a brand symbol of a family restaurant on brand image, preference, and purchasing intention. With regard to analysis methods, the study carried out a reliability test and a validity test concerning a precedent research concept, ahead of verifying the hypothesis by using the SPSS Ver. 16.0. Also, the study conducted a frequency analysis, technical analysis, exploratory factor analysis, and regression analysis for verifying the hypothesis. As a result of the research, regarding a brand symbol as a visual symbol, three factors including a functional factor, a value factor, and an aesthetic factor were extracted, and of them, the functional factor and an aesthetic factor were discovered to influence of the brand image and preference which affected purchasing intention. In addition, consumers preferred a logo type that includes a company name or a brand name rather than a picture or a mark type of a symbol regarding a brand symbol, and they answered that outdoor advertising would raise awareness more than TV advertising. Based on these results, using a logo type symbol and the mix of outdoor advertising and TV advertising should be considered for brand launch.
전기자동차용 난방시스템의 성능 및 효율 향상에 관한 연구
김기영(Ki Yeong Kim),김성철(Sung Chul Kim),김민수(Min Soo Kim) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
In this study, a combined system of heat pump and PTC heater was developed for air conditioning unit in electric vehicles. The system consists of a compressor, a condenser, an evaporator, an expansion device and a PTC heater. Experiments were carried out to examine the steady state characteristics of this system. Compressor speed, outdoor air inlet temperature, indoor air inlet temperature are varied and the performance of the system was experimentally investigated. The heating capacity, compressor power consumption and COP were obtained. For the heat pump system, PTC heater and combined system, the heating performance and efficiency were investigated to find optimal control method. The results of this study show good agreement with the experimental results available in the literature. Therefore this study provides experimental data of good quality for forthcoming studies on heating system design and development for electric vehicles.
학교의 전문적 학습공동체가 역량함양 교육활동에 미치는 영향 : 과정중심평가 연수의 조절효과를 중심으로
이세미(Lee, Se-mi),김기영(Kim, Ki-yeong),김해련(Kim, Hae-ryun),김영식(Kim, Yeong-sik),김이경(Kim, Ee-gyeong) 한국교원교육학회 2020 한국교원교육연구 Vol.37 No.4
본 연구는 학교의 전문적 학습공동체와 학교의 역량함양 교육활동 간의 영향관계 및 이 두 변수 간의 관계에 있어서 과정중심평가 연수가 갖는 조절효과를 분석하는 데 목적이 있다. 이를 위해 한국교육종단연구 2013의 5차년도(2017년) 학교 조사 결과 가운데 결측치를 제외한 1,045개 학교의 응답 자료를 토대로 기술통계, 상관관계분석, 단순 선형 회귀분석, 위계적 회귀분석을 실시하고, SPSS PROCESS macro 3.5를 이용하여 조절효과를 검증하였다. 연구 결과, 학교 구성원 모두가 학생의 학습에 초점을 맞춘 전문적 학습공동체의 일원으로 적극 협력할 경우 역량함양 교육활동은 더욱 활발해지는 영향관계가 있고, 교내에서 실시되는 과정중심평가 연수는 학교의 전문적 학습공동체가 역량함양 교육활동에 미치는 영향을 조절하는 효과가 있음을 확인하였다. 이러한 연구 결과를 바탕으로 2015 개정교육과정이 지향하는 역량함양 교육의 활성화를 이해하고 실천하는 데 필요한 학문적, 정책적 시사점을 도출하여 제시하였다. 특히, 교사 중심 협의의 전문적 학습공동체 개념이 교장, 교감, 교사, 교직원 모두를 포괄하는 넓은 의미의 전문적 학습공동체로 확장될 필요가 있으며, 교육 실천의 관점에서 학교 구성원의 인식 전환을 위한 학교경영 리더십과 전략, 연수기회 제공 등의 필요성을 강조하였다. This study seeks to analyze the relationship of influence of a professional learning community of school and a competency development activity in school, and the moderating effect of process-focused assessment teacher training between the two variables. Out of 「KELS 2013」, the 5th(2017) data set, the responses of 1,045 school data were analyzed excluding outliers. Descriptive statistics, correlation, simple regresssion, and hierarchical regression analysis were used to answer these questions, and SPSS Process Macro 3.5 was used to verify the moderating effect. According to the results, when all of the school members eagerly cooperated as a member of professional learning community of school focusing on students’ learning, competency development activities had more impact actively. It was confirmed that the moderating effect of process-focused assessment teacher training conducted in school adjusted the influence of professional learning community of school upon competency development activity. Based on the result, we suggested that the academic and policy implication were presented to understand and to practice vitalization of competency development in the pursuit of the 2015 revised curriculum. In particular, the concept of a professional learning community oriented to teachers needed to be extended to a professional learning community including principals, vice principals, teachers, and the teaching staff in a broad sense, and we emphasized the necessity of school management leadership, strategy, and teacher training to change the perception of school members in the perspective of practice in education.
유기훈(Ki-Hoon Yoo),김기영(Gi-Young Kim),안영기(Yeong-Gi Ahn),차동원(Dong-Won Cha),신구환(Goo-Hwan Shin),김동국(Dong-Guk Kim),채장수(Jang-Soo Chae),장중순(Joong-Soon Jang) 한국신뢰성학회 2015 신뢰성응용연구 Vol.15 No.1
In this study, we propose reliability prediction of a satellite by function analysis. To do so, the intended functions of the satellite are derived from using function structure block diagram, and defined as main, sub, and detailed functions. Furthermore, in order to generate function and reliability structure table, reliability model rule, duty cycle, and types of switch are assigned to the classified functions. This study also establishes reliability block diagram and mathematical reliability models to schematize the relationship among the functions. The reliability of the classified function is estimated by calculating the failure rate of parts comprising them. Finally, we apply the proposed method to a small satellite as a case study. The result shows that the reliability for the detailed function and the sub function as well as the main function could be predicted quantitatively and accurately by the proposed approach.