고무의 마찰과 마모 특성에 대한 고찰

김현재,김세녕,김수형,김두만,Kim, Hyun-Jae,Kim, Se-Nyung,Kim, Su-Hyung,Kim, Doo-Man 항공우주시스템공학회 2010 항공우주시스템공학회지 Vol.4 No.4

The basic factor that affect wear performance is the wear characteristics, which come from sliding friction between rubber compound and road. Thus, this study focused on friction and wear of rubber. This paper briefly explain some characteristics of friction and wear referring to the papers on wear of rubber that scholars researched on. Research activities to predict the performance of the rubber wear is also explained.

종이기반의 microfluidics를 이용한 눈물 내 글루코오스 측정 연구

김현재,정신영,노혜란,Kim, Hyun-Jae,Jeong, Shinyoung,Noh, Hyeran 대한화학회 2015 대한화학회지 Vol.59 No.1

랭킨 사이클용 스팀 익스펜더 성능해석

김현재(Hyun Jae Kim),김성준(Sung Jun Kim),김유찬(You Chan Kim),김현진(Hyun Jin Kim) 한국유체기계학회 2009 유체기계 연구개발 발표회 논문집 Vol.2009 No.-

A steam expander has been studied for its usability as a power conversion device in a Rankine cycle, which can be used for on site power generation or waste heat recovery. Design of swash plate type expander has been practiced and its performance has been estimated. With the steam pressure and temperature of 35bar and 300℃ at the expander inlet, respectively, it was calculated that the expander produced the shaft power output of about 5㎾ from steam energy of 35㎾. Adiabatic and mechanical efficiencies of the designed expander were 86.5% and 96.7%, respectively. With the volumetric efficiency of 90%, the total efficiency of the expander was 75.3%.

물질에 대한 아동의 선개념 및 수업 효과

김현재(Hyun Jae Kim),남희정(Hee Jeong Nam) 한국초등과학교육학회 1997 초등과학교육 Vol.16 No.1

The purpose of this study was to investigate children`s preconception about materials and the effect of invention. 67 samples were selected in the Attached Elementary School to Inchon National University of Education. They were divided into 22 samples in grade 1 and 3, and 23 samples in grade 5. The result were shown as follows. First, children`s preconception about materials were very various. Second, through the intervention, they were tasted and changed their ideas(characteristics, states, usagd, source and ability etc.). But some idea did not be changed after intervention.

서울시 아파트 매매 및 전세가격 결정요인의 분석

김현재 ( Kim Hyun Jae ) 한국부동산학회 2003 不動産學報 Vol.20 No.-

1. CONTENTS ⑴ RESEARCH OBJECTIVES While the subjects of earlier researches were only limited to sales prices of apartments, this thesis aims to carry out analysis on both the sales prices and the Chonsei prices of apartments in Seoul. The writer used random values for 4699 apartments in Seoul, or instrumental variables for values when impossible of presumption. To prevent data preponderance, data is distributed evenly to each district. Based on the analysis of the apartment prices in Seoul, this research analyzes Chonsei prices by applying the same descriptive variables. The result of analysis shows consumers’ preferences for occupancy patterns and differences between sales prices and Chonsei prices based on measurable factors. (2) RESEARCH METHOD ANALYSIS : semi-log & Hedonic Function, Multiple Regression Analysis. ⑶ RESEARCH RESULTS In this article, the determining factors of apartment sales prices and Chonsei prices have been analyzed and influential power of each factor has been measured. First, it describes fluctuation in prices, which is caused by the difference between sales prices and Chonsei prices, and it also describes the differences among various price-determining factors. Second, it describes factors that influence the consumers’ choices between sales or Chonsei. Third, it describes how different concepts of possession influence the price determining factors. 2. RESULTS As a result, there are three factors that influence determination of prices for apartments: internal factors such as size of the space, exposure, and level, area factors including distance from downtown and transportation facilities and finally surrounding factors such as presence of schools and parks, and the educational level of the area. As the result of the analysis, sales prices and Chonsei prices were found both high in the areas with good view and recreation facilities such as parks. The descriptive variables obtained similar results. The minus (-) exterior factors such as air pollution, pillar complex, age of the building, and exposure are found to be the factors that hinder rising of prices. As the floor space increases, the price can rise relatively high. Consequently, household that own apartments with larger floor size profits more.

아동의 확률개념 형성에 관한 연구

김현재(Hyun Jae Kim),이송현(Song Hyun Lee) 한국초등과학교육학회 1993 초등과학교육 Vol.12 No.1

The purpose of this study is to investigate on the level of the underesting of probability concept. The result were shown as follows: 1. Mixing and irreversibility, quantification of probability, permutation, combination and arrangement were apposite to age level but symmetric and uniform distribution, balloting by pairs were late to age level of probability concepts. 2. The difference between boy and girl appeared in 6 grade well on formation of probility concept but it is appear little or not in 4 grade and 5 grade.

열린교실에서 초등과학의 효과적인 학습지도전략

김현재(Hyun Jae Kim) 한국초등과학교육학회 1995 초등과학교육 Vol.14 No.2

The goal of the study was to suggest effective teaching methods of primary science for open classroom. In order to attain the goal of this study used literature review as its main strategy about theory of open education and theory of teaching-learning on science education. This study was carried out through the process of steps as follows : ·Main points for open education, ·Analysis on general instructional models, ·Construction of principles on development for teaching models of open education, ·Guidline and developing general model of primary science teaching model was given as an example applicable for primary science for open classroom. The model was composed appropriate teaching strategies and process as following 5 phase : Preparation --- Encounter --- Challenge --- Dialogue --- Evaluation. This practice was suggested in order to analysis multiform teaching-learning strategy(Individual, Corner, Topics, Project, Role-Play, Cooperative, Creative Learning) on matching with the model of open classroom.

열린교실에서 과학교육의 협동학습 전략

김현재(Hyun Jae Kim) 한국초등과학교육학회 1996 초등과학교육 Vol.15 No.1

The purpose of this study is to investigate cooperative learning strategy on science education for open classroom. In order to achieve the purpose of this study, the researcher used view of the literature as its main strategy about theary on open education and cooperative learning for science education. The study was carried out through the process of following steps; ① cooperative learning was compared with open education on the parts of definitions, theories and their characters, ② cooperative learning model and its strategy were investigate on eight models containing Jigsaw I·II model, ③ finally those were discussed along with several points of view. The researcher suggested the research tasks for further studies on practical effect from cooperative learning for open classroom in science education.

논리요소 분석에 의한 자연과 학습지도가 인지 가속에 미치는 연향

김현재(Hyun Jae Kim),장경례(kyung Rae Chang) 한국초등과학교육학회 1992 초등과학교육 Vol.11 No.1

The main purpose of this research was to fine out the effect Cognitive Acceleration of teaching Logical thinking thorough Korean primary Science Textbook according to the Analysis of the Logical Factors. The contents of this study was concentrated ai the application of effect on Cognitive Acceleration modofying Korean primacy science Textbook according CASE project for the achievement of primary Science, RTLO, SRT arid STSP. Based on the analysis of the resulting data dated with this study, the effect of the teaching was increased positively except the achievement of Primary science.

베트남 관료부패의 실태와 원인

김현재(Kim Hyun Jae) 한국부패학회 2016 한국부패학회보 Vol.21 No.1

Corruption still prevails in almost every field of the Vietnamese society, including the governing Communist Party, judicial authorities, finance and tax authorities and public services. Amongst all, the most notorious traditions are the acceptance of bribery between government officials and pass-down of their government positions to their sons. Considering that Vietnam has one sole governing party, which is the Communist Party, it is a very serious problem that the government officials are corrupted, because the corrupted officials may bring disgrace on the Party and the government, which would have an adverse effect on the country s on-going development. This paper examines the corrupted bureaucracy in Vietnam with a focus on the bribery accepted and government positions (unfairly) passed down to generations. Firstly, this paper reviews the precedent researches on the same subject. And then it analyzes the relevant examples, press releases, and interviews in regards to the two most prevalent types of corruption in Vietnam. Finally, this paper evaluates the causes of corruption and the possibilities of eradicating its corrupted traditions with its after-effects, and then draws a conclusion about implications of the corrupted Vietnamese bureaucracy. 베트남의 당정기관, 사법기관, 권력기관, 금융, 세관, 공기업 등 거의 모든 분야에서 관료들의 부패가 만연해 있다. 특히, 관료들의 뇌물수뢰 행위와 공직의 대물림은 오랜 관행으로서 사회 전반에 깊이 뿌리 내려져있다. 공산당 일당 체제의 사회주의 국가 베트남에서 부패의 주인공이 관료들이라면 상황이 매우 심각하다고 볼 수 있다. 왜냐하면 관료부패는 당과 정부의 공신력을 와해시킴으로써 국가 발전에 크나큰 역기능을 초래하기 때문이다. 본 연구는 베트남 관료부패의 실태를 고찰하기 위해서 오늘날 베트남 관료들의 가장 보편적 부패행위로 알려진 뇌물수뢰와 공직의 대물림, 매관매직을 중심으로 살펴본다. 이를 위해서 국내에서 수행된 베트남의 부패 관련 선행연구를 검토하고, 베트남 관료부패의 실태를 뇌물수뢰와 공직의 대물림 등 대표적 두 가지 부패행위로 구분해 관련 사례, 보도자료, 면담 내용 등을 살펴본다. 그리고 관료부패의 원인을 분석, 고찰하고, 마지막으로 베트남 관료부패 척결에 대한 가능성과 그에 대한 후과(後果)를 전망한다.