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김경훈 한국비쥬얼디자인학회 1999 한국디자인포럼 Vol.4 No.-
In the 21st century knowledge-and-information-oriented age, individual diversity is emphasized, and information acquisition and consumption levels are heightened. This trend of the times refuses to accept the mass production system centering around the competition in price. In consequence, inevitably does come the age of value created in which quality goods are produced by the multikind and small quantitiy production system. Design along with information and communication as 21st century knowledge-based business is gaining ground as a main factor national competitiveness is dependent upon in this age. Accordingly, the purpose of this study is to analyze the process and realities of the establishment of a firm specialized in venture design, both one of knowledge-based business and one factor which decides whether in the knowledge-and-information-oriented age, the millennium, our country will gain ground as one of the leading countries in the world or it will set in the west just like the twilight of the 20th century, and try to pave the way to promote the establishment of design venture required by this age. In a knowledge-based economic society, working methods are more important than working hours, and technical knowledge is more important than general knowledge. Desire for self-achievement is to be stronger than unilateral sense of loyalty to an organization. For the country in which there are many men of great originality who can enhance value added through incessant self-improvement, self-development and self -reformation can secure competitiveness among nations in the upcoming century.
김경훈,한대건,김정욱,임종훈,이종소,김형수 한국습지학회 2019 한국습지학회지 Vol.21 No.1
기후변화로 인해 홍수나 가뭄과 같은 자연재난이 빈번하게 발생하고 있고, 이로 인한 피해 또한 커지고 있다. 습지는 이러한피해를 저감하고 최소화하는데 중요한 역할을 하고 있는 것으로 알려져 있다. 특히, 자연재난으로 인한 피해 저감 뿐만 아니라습지의 다양한 기능을 이해하기 위해서는 수위의 변동성을 분석할 필요가 있다. 따라서 본 연구에서는 경상남도 창녕군에위치한 우포늪의 수위 자료에 적합한 시계열 모형을 도출하고 모형의 적절성을 확인하기 위해 잔차 분석을 수행하였다. 즉, ARIMA 모형을 구축하였고, 잔차 분석을 위해 기존의 비모수 통계기법, BDS 통계기법 및 CRH(Close Returns Histogram)를통한 결과들을 비교 분석하였다. 특히, 본 연구에서는 시계열 모형의 잔차 분석을 위해 CRH의 적용 가능성을 제시하고자하였다. 분석 결과, CRH는 정확한 무작위성 검정 결과를 도출하였을 뿐만 아니라 다른 방법들에 비해서 단순한 계산과정을통해 쉽게 결과를 얻을 수 있었다. 따라서 시계열 모형의 잔차 분석을 위해 BDS 통계기법 뿐만 아니라 CRH를 이용한다면보다 효과적인 분석을 할 수 있을 것으로 판단된다. Recently, natural disasters such as floods and droughts are frequently occurred due to climate change and the damage is also increasing. Wetland is known to play an important role in reducing and minimizing the damage. In particular, water level variability needs to be analyzed in order to understand the various functions of wetland as well as the reduction of damage caused by natural disaster. Therefore, in this study, we fitted water level series of Upo wetland in Changnyeong, Gyeongnam province to a proper time series model and residual test was performed to confirm the appropriateness of the model. In other words, ARIMA model was constructed and its residual tests were performed using existing nonparametric statistics, BDS statistic, and Close Returns Histogram(CRH). The results of residual tests were compared and especially, we showed the applicability of CRH to analyze the residuals of time series model. As a result, CRH produced not only accurate randomness test result, but also produced result in a simple calculation process compared to the other methods. Therefore, we have shown that CRH and BDS statistic can be effective tools for analyzing residual in time series model.
Improved Circuits for Single-photon Avalanche Photodiode Detectors
김경훈,이준안,송봉섭,범진욱 대한전자공학회 2014 Journal of semiconductor technology and science Vol.14 No.6
A CMOS photo detection bias quenching circuit is developed to be used with single photon avalanche photodiodes (SPADs) operating in Geiger mode for the detection of weak optical signals. The proposed bias quenching circuits for the performance improvement reduce the circuit size as well as improve the performance of the quenching operation. They are fabricated in a 0.18-μm standard CMOS technology to verify the effectiveness of this technique with the chip area of only 300 μm2, which is about 60 % of the previous reported circuit. Two types of proposed circuits with resistive and capacitive load demonstrated improved performance of reduced quenching time. With a commercial APD by HAMAMATSU, the dead time can be adjusted as small as 50 ns.
Phenyl glycidyl ether 와 이산화탄소의 부가반응에서 고정화된 4 급 암모늄염 촉매의 응용
김경훈,박대원,박주영,김장주,문정열 한국공업화학회 2000 응용화학 Vol.4 No.2
In the present study, the synthesis of phenoxy methyl ethylene carbonate from carbon dioxide and phenyl glycidyl ether was investigated using polymer-immobilized quaternary ammonium salts as catalysts. The catalysts were prepared by partial emulsion copolymerization of styrene(ST), divinylbenzene(DVB) and vinylbenzyl chloride(VBC). The influence of VBC concentration, the degree of crosslinking, partial polymerization time and the structure of trialkyl amine of quaternary salts on the catalytic behavior was discussed.
영어 연극 활동을 활용한 영어 말하기 능력 향상에 관한 연구
김경훈,이승은 인문사회 21 2022 인문사회 21 Vol.13 No.3
A Study on Improving English Speaking CompetenceThrough English Play ActivitiesKyunghoon Kim & Seungeun Lee Abstract: The purpose of this study is to research middle school the first grade students' English speaking problems and to suggest how to improve their English speaking competence through the English Play Activities. For this study the experimental group had been performed through English Play Activities for 11 weeks. The data for this study was obtained by the interview test about the English speaking. The data analysis method was the response sample t-test through the SPSS 23.0. The results are as follows. First, the mean score for the post-test was significant higher than that of pre-test. Second, most of the students who were performed by English Play Activities responded that they were interested in and satisfied with English Play Activities. From the results of this study, we found that the use of English Play Activities was effective in improving the middle school students' English speaking competence. Key Words: English Play Activities, English Speaking Competence, Interest, Satisfaction, t-test 영어 연극 활동을 활용한 영어 말하기 능력 향상에 관한 연구김 경 훈**ㆍ이 승 은*** 요약: 이 연구의 목적은 중학교 1학년 학생들의 영어 말하기의 문제점들을 파악하고 영어연극 활동을 통해 영어 말하기 능력을 향상시키는 방법을 연구하는 것이다. 이를 위해 실험집단은 11주 동안 영어연극 활동을 실시하였다. 연구에 필요한 자료들을 얻기 위해 영어 인터뷰 테스트를 실시하였다. 자료 분석은 SPSS 23.0을 사용하여 대응 표본 t-test를 실시하였다. 그 결과는 다음과 같다. 첫째, 경우에는 사후평가의 결과가 사전평가의 결과보다 유의미하게 더 높았다. 두 번째, 영어연극 활동에 대해 높은 만족도와 흥미도를 보였다. 이 연구 결과로 영어연극 활동은 중학생들의 영어 말하기 능력 향상에 있어서 효과적이었다. 핵심어: 영어연극 활동, 영어 말하기 능력, 흥미도, 만족도, t검증 □ 접수일: 2022년 5월 31일, 수정일: 2022년 6월 10일, 게재확정일: 2022년 6월 20일* 이 논문은 2022학년도 광주여자대학교 학술연구비 지원을 받아 연구되었음(KWUI22-023). ** 주저자, 광주여자대학교 경찰법학과 교수(First Author, Professor, Kwangju Women’s Univ., Email: khkim@kwu.ac.kr)*** 교신저자, 광주여자대학교 어린이영어교육학과 교수(Corresponding Author, Professor, Kwangju Women’s Univ., Email: selee@kwu.ac.kr)