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김충수(Chung-Soo Kim),박범환(Bum Hwan Park),안준용(Joon-Yong An) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.5
국내외적으로 경쟁에 직면하고 있는 기업들은 보다 좋은 품질의 제품을 보다 저렴한 가격에 판매하지 않으면 생존하기가 어렵게 되었다. 최근 들어 물류이동과 수송으로 인하여 우리 나라 철도산업이 동북아의 물류중심으로 자리잡고 있다. 반면, 철도는 기간산업으로 건설에 대규모의 투자가 이루어지며 운영에 따른 자산유지비용 등 막대한 비용이 발생하여 수익성과 유통성에 문제점을 발생시키고 있는 실정이다. 이러한 환경변화에 생존하기 위하여 보다 정교한 비용정보와 원가관리가 중요하게 되었다. 원가기획 및 원가관리의 효과적 수단으로 크게 관심이 집중되고 있는 수명주기원가(Life Cycle Cost, LCC)가 있다. 기존의 철도분야의 연구에서는 철도기반시설과 차량에 대한 LCC에 대한 연구는 있어 왔지만, 이를 원가관리와 관련한 연구는 거의 없는 실정이다. 이에 철도자산의 효과적인 원가관리수단으로 LCC를 연구하고자 한다.
무선 XML 데이터 방송을 위한 에너지 효율적인 스트리밍 기법
김충수(Chung Soo Kim),정연돈(Yon Dohn Chung) 한국정보과학회 데이터베이스 소사이어티 2005 데이타베이스 연구 Vol.21 No.3
본 논문에서는 무선 환경에서 서버가 다수의 클라이언트에게 무선 방송기법을 통해 XML 데이터를 효율적으로 스트리밍하기 위한 기법을 제안한다. 제안하는 방법은 원본 XML 문서의 불필요한 중복(닫는 태그)을 없애 전송되는 문서를 손실 없이 압축하여 접근 시간을 향상시킨다. 또한 XML의 질의가 경로로 나타내어지는 특징을 이용하여 별도의 색인을 두지 않고, 스트림 내에서 데이터 자체를 트리형태로 구성하여 색인의 역할을 할 수 있도록 하였다. 마지막으로, 제안하는 기법을 검증하기 위해 무선 방송을 가정한 파일 스트림을 만들고 클라이언트 모듈을 통해 파일 스트림을 XML 데이터로 복구하는 과정을 설계 및 구현하고, 여러 질의문을 이용하여 원형 XML 파일을 스트리밍 했을 경우와의 성능 차이를 비교한다. In this paper we propose a streaming method for wireless broadcasting XML data with which mobile clients can access the data in an energy-efficient way. The proposed method eliminates the closing tags for reducing XML data size, which improves the access time. Also, XML data are structured in a tree style which plays a role of index on the stream. We implemented the proposed method in a file-based simulation environments and compared it with a naive method - streaming of original XML documents.
철도종사원의 성격유형과 직무만족에 관한 실증적 연구 II
김충수,안준용,Kim, Chung-Soo,An, Joon-Yong 한국철도학회 2007 한국철도학회논문집 Vol.10 No.2
Recently, The business environment is very rapidly changed and complicated. Therefore, the companies are confront with the biggest difficulty. To overcome this difficulty, the management should be able to accomplish the human resources management and the efficient business management. Korea railroad industry has a close association with national life as it carries out public works based on its public nature as well as purses the corporate spirit. For that reason, Korea railroad industry has a great spin-off on national economy and exerts a tremendous impact on the improvement of productivity around the industries and the international competitiveness at aspect of efficiency resulting from business rationalization. Railroad system can be described as organic. Railroad Employs take a great role in this system. According the psychology and the Organization Behavior, the decision maker's personality and employee' work satisfaction have influence on performance. The purpose of this study is to examine the Railroad Employs' Personality and Work satisfaction which influence on the efficient business management.
김충수(Chung Soo Kim),안준용(Joon Yong An) 한국철도학회 2005 한국철도학회 학술발표대회논문집 Vol.- No.-
Recently, The business environment is very rapidly changed and complicated. Therefore, the companies are confront with the biggest difficulty. To overcome this difficulty, the management should be able to accomplish the human resources management and the efficient business management. KR(Korea Railroad) has a close association with national life as it carries out public works based on its public nature as well as purses the corporate spirit. For that reason, KR has a great spin-off on national economy and exerts a tremendous impact on the improvement of productivity around the industries and the international competitiveness at aspect of efficiency resulting from business rationalization. Railroad system can be described as organic. Railroad Experts take a great role in this system. According the psychology and the Organization Behavior, the decision maker"s personality and employee" work satisfaction have influence on performance. The purpose of this study is to examine the Railroad Experts" Personality and Work satisfaction which influence on the efficient business management.
통계적 회귀 기법을 활용한 초음파 센서 기반의 기둥 및 차량 분류 알고리즘
이충수(Chung-Su Lee),박은수(Eun-Soo Park),이종환(Jong-Hwan Lee),김종희(Jong-Hee Kim),김학일(Hakil Kim) 제어로봇시스템학회 2014 제어·로봇·시스템학회 논문지 Vol.20 No.4
This paper proposes a statistical regression method for classifying pillars and vehicles in parking area using a single ultrasonic sensor. There are three types of information provided by the ultrasonic sensor: TOF, the peak and the width of a pulse, from which 67 different features are extracted through segmentation and data preprocessing. The classification using the multiple SVM and the multinomial logistic regression are applied to the set of extracted features, and has achieved the accuracy of 85% and 89.67%, respectively, over a set of real-world data. The experimental result proves that the proposed feature extraction and classification scheme is applicable to the object classification using an ultrasonic sensor.
김충수(Chung-Soo Kim),김동환(Dong-Hwan Kim),박만진(Man-Jin Park),장동영(Dong-Young Jang),한동철(Dong-Chul Han) 한국생산제조학회 2007 한국공작기계학회 춘계학술대회논문집 Vol.2007 No.-
A field emission electron gun including 3 electrodes which are one cathode and two anodes is very important for high resolution electron microscope and electron beam lithography. To have functions to control the initially-emitted electron beam in 3 electrode, two anodes act as an electrostatic lens according to equipotential lines with the capability of adjusting the spot size, intensity, and working distance. To verify the action of electrostatic lens by changing some parameters such as electrode shape, displacement and applied voltage to the electrodes, the two lenses were design and simulated and then their performances were analyzed with angular beam intensity (distribution), electrical optic axis variation and their stability.
김충수(Chung-Soo Kim),김동환(Dong Hwan Kim),박만진(Man-Jin Park),장동영(Dong-Young Jang),안성훈(Sung-Hoon Ahn),한동철(Dong-Chul Han) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
A Nano-tip as a cold field emitter for inducing a field emission current has manufactured in many ways. In the paper, the electrochemical etching method is used. Thus, in order to optimize the final shape as the field emitter, the reliable fabrication system for electrochemical etching was constructed. In addition, the effective parameters such as applied voltage, submerged length, meniscus height, electrolyte concentration and environmental condition(vibration, humidity, cut-off time) have investigated in detail. By controlling the parameters, reliable tungsten tip for field emitter was fabricated. And the fabricated tungsten tip was evaluated optically. Finally, the very sharp apex of the tungsten tip was observed with scanning electron microscope.
철도종사원의 성격유형과 직무만족에 관한 실증적 연구 Ⅰ
김충수(Chung Soo Kim),안준용(Joon Yong An),김백(Baek Kim) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
Recently, The business environment is very rapidly changed and complicated. Therefore, the companies are confront with the biggest difficulty. To overcome this difficulty, the management should be able to accomplish the human resources management and the efficient business management. Korea railroad industry has a close association with national life as it carries out public works based on its public nature as well as purses the corporate spirit. For that reason, Korea railroad industry has a great spin-off on national economy and exerts a tremendous impact on the improvement of productivity around the industries and the international competitiveness at aspect of efficiency resulting from business rationalization. Railroad system can be described as organic. Railroad Employs take a great role in this system. According the psychology and the Organization Behavior, the decision maker"s personality and employee" work satisfaction have influence on performance. The purpose of this study is to examine the Railroad Employs" Personality and Work satisfaction which influence on the efficient business management.