친환경 전기추진 어선의 경제적 타당성 분석에 관한 연구

차상현,노창균 한국무역연구원 2022 무역연구 Vol.18 No.5

Purpose – While domestic marine leisure activities during COVID-19 recently increased, marine leisure, which benefits us significantly, is increasing with national interest, and fishing preferences are currently increasing. Design/Methodology/Approach – Problems that may arise due to the increase in the fishing population can occur due to indiscriminate fishing, which can lead to environmental pollution because of reduced fishery resources, marine waste, bait use, food intake, and human excrement. Accordingly, in order to replace environmental pollution greenhouse gases of Korean fishing boats, the Ministry of Oceans and Fisheries aims to reduce 20,000 tons of CO₂ emissions in the fishing industry by 2030. Findings – In this study, as a result of a study on economic feasibility analysis of the fishing boat, the cost-benefit analysis calculation result of the fishing boat as an internal combustion engine fishing boat showed that the BCR was 0.8, and this value was less than 1. In the net present value analysis, the recovery amount by net present value was about -181,065,000 won. The internal rate of return (EIRR) was estimated at 10. When the business was operated as an internal combustion engine fishing boat of a fishing boat, the value of the result without economic feasibility was obtained. As a result of calculating the cost-benefit analysis as an electrically propelled fishing boat of the fishing boat, the BCR was 1.8, and this value was greater than 1. The net present value analysis was found to be about 882,015,000 won based on the net present value. The internal rate of return (EIRR) was estimated to be 14. Therefore, when the project was operated as an electrically propelled fishing boat, a result with economic feasibility was obtained. Research Implications – In conclusion, as a result of analyzing the economic feasibility of the fishing boat with an internal combustion engine, it was found that there was no economic feasibility. As a result of economic feasibility analysis as an electrically propelled fishing boat, it was found to have economic feasibility.

항만게이트의데미지컨테이너관리자동화시스템구축사례연구

차상현,노창균 한국항해항만학회 2017 한국항해항만학회지 Vol.41 No.3

컨테이너 선박의 대형화에 따라 컨테이너터미널 내에서 동일한 시간 내에 처리해야 하는 물동량이 계속적으로 증가하고 있다. 컨 테이너터미널에서는 수동처리 방식의 한계를 극복함과 동시에 지속적으로 운영측면에서 발생하는 비용을 줄이기 위하여 컨테이너터미널의 자동화 시스템을 도입하고 있다. 왜냐하면 컨테이너터미널의 게이트 반출ㆍ입 업무를 수행함에 있어 수작업 처리 시 부정확한 자료 처리로 혼란 요소가 다소 발생하고 있다. 바코드 시스템에서 스캐너에 바코드를 직접 인식시켜야하기 때문에 처리 시간소요가 다소 길고 불편함 있 어 이러한 문제점을 보안하여 게이트 자동화 시스템 RFID시스템은 차량 번호를 인식하는 기술을 이용하여 반출ㆍ입 처리 소요시간 단축하여 효율적인 게이트 업무 수행을 할 수 있다. 한편, 데미지 컨테이너 체크를 수동으로 진행하는 경우 게이트 반입 할때 컨테이너의 손상여부 확 인 후 수기로 게이트 작업자가 직접 문서을 작성하여 보관하기 때문에 고객이 데미지 컨테이너 증거자료를 요청할때 증거자료로 제출하기에 불충분하여 고객으로부터 크레임을 받는 경우가 발생하였다. 또한, 게이트 작업자 및 인력에 의한 컨테이너 관리의 어려움 발생하였고 게이트 주변 인력의 컨테이너 관리 안전사고에 위험이 항상 노출되어 있었다. 본 논문에서 고찰하는 게이트 데미지 컨테이너 자동화 시스템을 도입 하게 되면 영상 저장 시스템에 의한 컨테이너 관리가 가능하다. 컨테이너 손상정보가 시스템에 저장되어 있기 때문에 고객이 데미지 컨테이 너 자료를 요청 시 시스템에 저장 되어 있는 데미지 컨테이너 영상을 검색하여 증거자료 제출이 가능하고 고객으로부터의 크레임 대비가 가 능하다. 또한, 게이트 관리 인력 업무의 통합으로 인력 감소 및 게이트 부근 안전사고 위험이 감소하였다. As container vessels get larger, container terminals are also likely to grow. The problem that arises is that the growing volume should be handled in the same amount of time as before. Container terminals are introducing an automation system in order to overcome the limitations of existing manual methods and to continuously reduce operating expenses. Because, Manual handling of carrying containers gate in and out of terminals causes inaccurate data, which results in confusion. An alternative is for containers to be labeled with barcodes that can be scanned into a system with a scanner, but this takes quite a long time and is inconvenient. A RFID system, also known as a gate automation system, can solve these problems by reducing the time of gate management with a technology that detects number identification plates, helping operators more efficiently perform gate management work. Having said that, with this system, when container damage is detected, gate operators make and keep documents manually. These documents, which are insufficient evidence in proving container damage, result in customer claims. In addition, it is difficult for gate operators and other workers to manage containers, exposing them to danger and accidents. This study suggests that if an automation system is introduced at gates, containers can be managed by a video storage system in order to better document damage The video system maintains information on container damage, allowing operators the ability to search for videos they need upon customer request, also allowing them to be better prepared for customer claims. In addition, this system reduces necessary personnel and risk of accidents near gates by integrating a wide range of work.

컨테이너터미널에서 생산성 향상을 위한 Pooling 시스템 개발 연구

차상현,노창균 해양환경안전학회 2013 해양환경안전학회 학술발표대회 논문집 Vol.2013 No.04

유전학연구실에 의뢰된 환자의 핵형분석

차상현,이권해,유훈 대한산부인과학회 1988 대한산부인과학회 학술대회 Vol.62 No.-

A Research of Power-Efficient Driving Scheme for Auto-Focus on Image Sensor Module

차상현,박찬우,이연중,황병원,권오조,박득희,권경수,이재신,황신환,Cha, Sang-Hyun,Park, Chan-Woo,Lee, Yuen-Joong,Hwang, Byoung-Won,Kwon, Oh-Jo,Park, Deuk-Hee,Kwon, Kyoung-Soo,Lee, Jae-Shin,Hwang, Shin-Hwan Institute of Control 2009 제어·로봇·시스템학회 논문지 Vol.15 No.12

We present a power-efficient driving scheme that consists of piezoelectric actuator and driver IC for AF (Auto-Focus) on ISM (Image Sensor Module). The piezoelectric actuator is more power-efficient than conventional voice coil motor actuator. And high power-efficiency driver IC is designed. So the proposed driving scheme using designed piezoelectric actuator and driver IC is more close to recent trend of green IT. The diver IC should guarantee fast and accurate performance. So, the optimum driving method and high accurate frequency synthesizer are proposed. The die area of designed driver IC is $2.0{\times}1.6mm^2$ and power consumption is 2.8mW.

형제에서 발생한 고환여성화증후군

차상현,이임순,이권해,조태호 대한산부인과학회 1989 대한산부인과학회 학술대회 Vol.63 No.-

Investigation on the Perceptions of Middle School Science Teachers and Students about Creativity Components of Middle School Science Textbooks

차상현,류광수 한국교원대학교 뇌기반교육연구소 2018 Brain, Digital, & Learning Vol.8 No.4

The purpose of this study is to investigate the perceptions of middle school science teachers and students about how the middle school science textbook according to 2009 revision curriculum helps students' creativity, how much creativity components are included in science textbooks, which component of the science textbook is appropriate to develop creativity improvement. Through questionnaires, the data on creativity perception survey of 45 middle school science teachers and 723 students about the science textbooks were collected and analyzed statistically. Interestingly, the extent to which science textbooks helped to improve creativity was recognized as moderate, and the inclusion of creativity components was also recognized as moderate. Specifically, the science teachers were less likely to help improve creativity in textbooks than students, and had more elasticity in terms of the components. On the contrary, there were no significant differences among the students. In addition, the inquiry activities among the components of science textbooks were perceived as the best element for creativity in science teachers and students.

터미널운영 효율성 향상을 위한 적용사례 연구

차상현,노창균 한국항해항만학회 2012 한국항해항만학회 학술대회논문집 Vol.2012 No.추계

터미널의 경쟁력 제고, 터미널 생산성 향상이 중요한 요소라고 할 수 있다. 이러한 생산성에 영향을 줄 수 있는 요인은 다양하다. 그 증 야드 이송장비의 경우, 특정 선석크레인(QC, Quay Crane)에 야드 트랙터(YT, Yard Tractor)가 고정 할당되는 방식에서 다수 QC들의 작업을 처리하는 풀링 시스펨 방식으로 전환으로 터미널 생산성과 YT의 가용성을 높일 수 있다.

3계층 클라이언트/서버 구조에서 코바/자바 ORBs와 HTTP/CGI의 성능 비교

차상현,김양우 동국대학교 산업기술연구원 2000 산업기술논문집 Vol.11 No.2

이 논문에서는 CORBA/Java ORBs와 인터넷상에서 3계층 클라이언트/서버 솔루션을 생성하는 지배적인 모델인 HTTP/CGI의 성능을 비교한다. 이를 위해 각각의 클라이언트/서버 카운트 프로그램을 생성한 후 그 결과의 비교를 통해 어느 것이 성능이 우수한지를 판단하고자 한다. CORBA/Java ORBs의 성능 측정을 위해 서버측은 간단한 CORBA객체들로 구성되고 이 객체는 카운터를 증가시키고 클라이언트의 요청을 수신할 때마다 현재의 카운트를 반환한다. 클라이언트는 CORBA ORBs를 통해 정적으로 메소드를 호출하는 것에 의해 서버와 대화하도록 설정하였으며 컴퓨터내에서 로컬 프로세스들간의 성능을 위한 ORBs Visigenic사의 Visibroker for Java를 사용하여 모의 시뮬레이션을 하였다. 이러한 과정을 통해 클라이언트와 서버 사이의 왕복시간을 측정한다. 반면에 HTTP/CGI는 자바 애플릿이 서버와 상호작용하기 위해서 CORBA대신에 HTTP/Socket을 사용한다. 이를 통해 클라이언트는 애플릿과 HTML문을 다운받은 후 클라이언트측 인터페이스에서 카운트를 설정하고 서버를 통해 실질적인 실행을 하는 CGI서버를 호출하게 된다. 이러한 과정에 의한 클라이언트가 1000번의 메소드 호출을 통해 ms당 평균응답시간을 측정한 결과 CORBA/Java ORBs는 0.0293 msecs, HTTP/CGI는 6.739 msecs가 측정되었다. 이는 엄청난 성능의 차이로 CORBA/Java ORBs가 HTTP/CGI에 비해 약 230배가 뛰어나다는 결과를 얻었다. 위의 성능 측정 결과를 보면 알 수 있듯이 CGI가 오늘날의 지배적인 클라이언트/서버 어플리케이션이지만 CORBA/IIOP가 인터넷 백본으로서 HTTP/CGI를 대체할 수 있는 대안으로서 떠오르고 있다. In this paper we compare performance between the one developed using CORBA/Java ORBs and the other in HTTP/CGI which is dominantly used in 3-tier client/server solution development. In order to compare the performance, a client/server count program has been written in both approaches, and results are compared. The server in CORBA/Java ORBs approach is made of CORBA objects which increase and return the count value whenever client request is accepted. Client communicates with server through CORBA ORBs by calling corresponding methods. In this way we measured the return time. On the other hand, Java applet in HTTP/CGI approach uses HTTP/Socket instead of CORBA to communicate with server. In this way, a client can setup counter after downloading the applet and HTML statements, then call CGI server for executing the statement. Then the applet outputs the time taken for increment and ping instruction to output field. The time measured after repeating 1000 times of this experiment shows that it tool 0.0293 msecs in CORBA/Java ORBs approach, and 6.739 msecs in HTTP/CGI approach. It shows that CORBA/Java ORBs approach is better than HTTP/CGI approach about 230 times. As shown in the paper CGI approach which is commonly used today may be replaced by CORBA/Java ORBs approach within near future.

컨테이너터미널에서 본선 크레인 자동화 시스템 적용·경제적 타당성 분석

차상현,노창균 한국무역연구원 2022 무역연구 Vol.18 No.2

Purpose Recently, the increase in the volume of cargo at container terminals is accelerating. Amid this, container terminals are spurring automation due to COVID 19 and cargo enlargement. Design/Methodology/Approach Container terminals propose cost saving and the service quality improvement competitively by improving the efficiency of the terminal operating system, adjusting the loading and unloading cost compared to other competitors, and providing differentiated ancillary services, and they seek various methods to attract cargo and prevent the deviation of existing customers. Findings This study conducted the economic feasibility analysis through container number recognition based on container number recognition process, algorithm, a Tos system, and loading and unloading hardware application method, and in the case of a Discharge·Load crane manual system, the B/C ratio is 0.8 as a result of cost benefit analysis, and the value is less than 1. The net current value analysis showed the input amount by the net current value is about 33.6 billion Won, while the collection amount is about -8.2 billion Won. The internal rate of return (IRP) is estimated to be 8, which is smaller than 10%, the social discount rate. Therefore, if the container terminals are operated with the Discharge·Load crane manual system, the result value shows the economic feasibility is short if the Discharge·Load crane automation system B/C ratio is 1.6 as a result of cost benefit analysis, and the value is more than 1. The net current value analysis showed the input amount by the net current value is about 33.8 billion Won, while the collection amount is about 19.9 billion Won. The internal rate of return is estimated to be 12, which is bigger than 10%, the social discount rate. Therefore, if the container terminals are operated with the Discharge·Load crane automation system, the result value shows economic feasibility exists. Research Implications In conclusion, if the Discharge·Load crane manual system is used, the result value shows the economic feasibility is short while if the Discharge·Load crane automation system is adopted, the result value shows economic feasibility.