할라이드 페로브스카이트 양자점의 개발 동향 및 디스플레이 응용

최용훈,김현중,박종남,Choe, Yong-Hun,Kim, Hyeon-Jung,Park, Jong-Nam 한국정보디스플레이학회 2019 인포메이션 디스플레이 Vol.20 No.1

노지 작물의 적정 관개계획을 위한 토양수분의 공간변이성 분석

최용훈,김민영,김영진,전종길,서명철,Choi, Yonghun,Kim, Minyoung,Kim, Youngjin,Jeon, Jonggil,Seo, Myungchul 한국농공학회 2016 한국농공학회논문집 Vol.58 No.5

Due to droughts and water shortages causing severe damage to crops and other vegetations, much attention has been given to efficient irrigation for upland farming. However, little information has been known to measure soil moisture levels in a field scale and apply their spatial variability for proper irrigation scheduling. This study aimed to characterize the spatial variability and temporal stability of soil water contents at depths of 10 cm, 20 cm and 30 cm on flat (loamy soil) and hill-slope fields (silt-loamy soil). Field monitoring of soil moisture contents was used for variogram analysis using GS+ software. Kriging produced from the structural parameters of variogram was applied for the means of spatial prediction. The overall results showed that the surface soil moisture presented a strong spatial dependence at the sampling time and space in the field scale. The coefficient variation (CV) of soil moisture was within 7.0~31.3 % in a flat field and 8.3~39.4 % in a hill-slope field, which was noticeable in the dry season rather than the rainy season. The drought assessment analysis showed that only one day (Dec. 21st) was determined as dry (20.4 % and 24.5 % for flat and hill-slope fields, respectively). In contrary to a hill-slope field where the full irrigation was necessary, the centralized irrigation scheme was appeared to be more effective for a flat field based on the spatial variability of soil moisture contents. The findings of this study clearly showed that the geostatistical analysis of soil moisture contents greatly contributes to proper irrigation scheduling for water-efficient irrigation with maximal crop productivity and environmental benefits.

인터넷상의 전화서비스를 위한 패킷손실특성 분석

고대식,최용훈 牧園大學校 1998 論文集 - 牧園大學校 Vol.35 No.-

The main problems of real-time phone service over Internet are packet losses, such as packet loss, delay and out of order packet. Therefore, packet loss recovery is one of th core techniques in real-time services over the Internet and packet loss characteristic is very important for developing recovery methods. In this paper, RTPing is designed for measuring packet loss characteristics, and the relation between packet size and loss were measured and analyzed by using RTPing. In experimental results using Internal education network and various traffic loads, it has been shown that RTPing is used as a efficient network simulator and packet loss is up to 23%.

The Birthday Party 小考

崔容勳 明知大學校 人文大學 英語英文學科 1986 Veritas Vol.- No.4

모험기업의 라이프 싸이클 단계별 재무전략

김재명,오정화,손재영,최용훈 강원대학교 석재복합신소재제품연구센터 1997 석재연 논문집 Vol.2 No.-

본 논문은 신제품의 사업화와 관련한 모험기업의 라이프 싸이클 단계별 재무전략, 특히 자금조달 전략에 관해 연구하였다. 특히 금융상품의 유형과 특성을 자본원천별로 분석하고, 이에 기초하여 모험기업의 성장단계별 자금조달전략을 제시하였다. 본 논문은 라이프싸이클을 4단계로 나누고, 각 단계별 재무특성과 자금원천의 특성을 고려하여 라이프싸이클 단계별 자금조달원천 행렬표를 제시하였다. 이에 따르면 모험기업은 라이프싸이클 단계별로 개인저축, 에인젤, 모험자본, 동업자, 기업공개, 그리고 잉여금 등의 지분자본원천과 회사채, 거래신용, 자산기초금융, 은행이나 보험회사 차입, 그리고 정책지원자금 등 부채자본원천을 중첩하여 자본조달원천으로 사용할 수 있음을 보여주고 있다. This paper discusses the relationships between stage of development in venture business life cycles and financial strategies. The paper selectively examines the study by reviewing the characteristics of the various finacial instruments on the basis of the cash flows of venture business life cycles. I suggested the source of capital matrix combining the various sources of capital. At each stage, the venture businessess should raise the funds by using the various combinations of sources of equity financing and debt financing.

The Zoo Story에 드러난 인간관계의 양상

崔容勛 한국현대영미어문학회 2001 The Journal of KACELLS Vol.6 No.1

In the tradition of American drama, Edward Albee has taken a specific place as one of the most competent and intelligent playwrights. Throughout his long career, he has attracted much attention from the audience and critics alike. But his success as a major dramatist was never attained by accident but a natural product of his early interest in writing novels and poems. Albee's early plays are closely related to his individual life. His departure from literary convention and his temperament as a bum have much to do with a tragic situation in which he was placed as a deserted child. Though adopted by a rich family, he couldn't escape from his spiritual wandering and agony. In particular, he was the very picture of criticism against the corrupted bourgeois society. As shown in his careers, his life, in essence, is the continuation of wandering. Roaming along the streets of New York, he saw a lot of people from almost all walks of life. Their lives and expreriences are deeply embedded in his early plays. Particularly noteworthy is the fact that six of his nine early plays are about 'a deserted child' and 'a permanent transient.' In The Zoo Story, Albee touchingly describes a social outcast isolated from other people and the world. The two characters, Jerry and Peter, are the ordinary people we come across on the streets. But they are also the allegory of fundamental human loneliness and alienation regardless of time and place. In Jerry and Peter, we can find the image of ourselves in a modern society. This paper aims to analyze the aspects of human relations as suggested in The Zoo Story. For this, it deals with the four main categories of human relations; the absence of communication, sexual obssession, animalistic nature, and physical contacts and violence. All these concepts have constituted the philosophical background of Albee's plays. His main concern was to suggest a more univeral human situation and a dilemma facing a contemporary society. In The Zoo Story, Albee shows how human relations are distorted and how eager we have been to get out of human isolation and alienation. But he is never a pessimist. By giving religious implications to Jerry's death, Albee suggests the possibility of change in distorted human relations. While caputring the dark side of human relations and the contemporary society, the playwright also talks about new hope and optimism.

작물 수분 스트레스 지수 산정을 위한 최적의 관측 간격과 시간에 대한 통계적 분석

최용훈,김민영,오우현,조정건,윤석규,이상봉,김영진,전종길 한국농공학회 2019 한국농공학회논문집 Vol.61 No.6

Continuous and tremendous data (canopy temperature and meteorological variables) are necessary to determine Crop Water Stress Index (CWSI). Thisstudy investigated the optimal monitoring time and interval of canopy temperature and meteorological variables (air temperature, relative humidity, solarradiation and wind speed) to determine CWSIs. The Nash-Sutcliffe model efficiency coefficient (NSE) was used to quantitatively describe the accuracyof sampling method depending upon various time intervals (t=5, 10, 15, 20, 30 and 60 minutes) and CWSIs per every minute were used as a reference. The NSE coefficient of wind speed was 0.516 at the sampling time of 60 minutes, while the ones of other meteorological variables and canopytemperature were greater than 0.8. The pattern of daily CWSIs increased from 8:00 am, reached the maximum value at 12:00 pm, then decreased after2:00 pm. The statistical analysis showed that the data collection at 11:40 am produced the closest CWSI value to the daily average of CWSI, whichindicates that just one time of measurement could be representative throughout the day. Overall, the findings of this study contributes to the economicaland convenient method of quantifying CWSIs and irrigation management.

The Homecoming에 드러난 不條理的 人間相과 역할의 전환

崔容勳 明知大學校 人文大學 英語英文學科 1994 Veritas Vol.- No.7

비강우시 도시 합류식 하수도의 오염부하 산정을 위한 최적관측시간 산정연구

최용훈,원철희,박운지,서지연,신민환,이찬기,최중대,Choi, Yong-Hun,Won, Chul-Hee,Park, Woon-Ji,Seo, Ji-Yeon,Shin, Min-Hwan,Lee, Chan-Ki,Choi, Joong-Dae 한국농공학회 2009 한국농공학회논문집 Vol.51 No.3

Flow and pollution load were monitored at 2 combined sewer outlets (C-1 and C-2) of urban watersheds during dry weather from September, 2004 to April, 2006 for 20 months. The objectives were to investigate the diurnal variation of flow and pollutant load and to find the proper sampling time that could measure representative flow and pollutant load. Pollution load closed to the average daily load at C-1 could be measured at 00:00 hour and by the mean of 15:00 and 18:00 hour measures, and 15:00 and 21:00 hour measures, respectively. In addition at C-2, it was 21:00 hour and the mean of 15:00 and 18:00 hour measures. This study concluded that arbitrary sampling of flow and water quality could cause large errors in the estimation of urban pollution load and recommended that urban combined sewers should be monitored when flow and water quality showed daily average and concentration.

개인용 인터넷텔레포니 인터페이스 설계

고대식,최용훈 牧園大學校 1999 論文集 - 牧園大學校 Vol.36 No.-

본 논문에서는 시내전화요금으로 인터넷을 이용하여 시외 및 국제전화를 할 수 있는 개인용 인터넷 텔레포니 인터페이스를 설계하고 이를 이용한 Phone-to-Phone 방식의 인터넷 전화를 구현하였으며 통화품질을 측정하였다. 실험을 위하여, 자체 개발된 PC-to-Pc 방식의 인터넷 전화 소프트웨어, 펜티엄 Pc 2대, 그리고 상용화 되어있는 전화기를 사용하였다. 통화실험은 X 대학교 학내전화와 X 대학교내에 LAN으로 연결된 Pc사이에서 이루어 졌고, 트래픽 변화에 따른 통화음질 실험은 국내 교육망으로 연결된 X 대학교와 Y 대학교 사이에 트래픽이 서로 다른 새벽(Unload traffic), 오전(Mid-load traffic), 오후(Load traffic)에 이루어졌다. 실험결과, 대형 게이트웨이 없이 일반전화기, 펜티엄 Pc 그리고 인터넷 텔레포니 인터페이스카드 만으로 Phone-to-Phone 방식의 인터넷 전화 구현이 가능함을 확인하였고 15% 이상의 패킷손실이 발생하면 이해도가 70%이하로 감소하는 것으로 나타났다.