• 한국농공학회:학술대회논문집
• /
• 한국농공학회 2000년도 학술발표회 발표논문집
• /
• pp.629-636
• /
• 2000

In this study, we investigated the characteristics of labor of water management and maintenance, water requirement, water quality(T-N, T-P, COD) in the paddy plot irrigated by pipeline with two types of hydrants: automatic and manual. The automatic hydrant have been introduced to the paddy field to save water and reduce the labor for water management. The automatic hydrant is automatically opened and closed according to the water depth of a paddy plot. The automatic hydrant generally developed more troubles than the manual hydrant. The water requirements are 2.7mm/d for the automatic hydrant plot and 17.6mm/d for the manual hydrant plot. The concentrations of pollutants in the two plots are higher in the ponded water than in the irrigation water and are highest after fertilizer application.

• 산업공학
• /
• 제24권1호
• /
• pp.71-77
• /
• 2011

Design works consist of essential works and subsidiary works. Essential design works means designing creative ideas and productive ideas, while subsidiary design works means helping essential works those are making data tables and specification sheets, checking CAD data's integrity. Subsidiary design works forms the bulk of the whole design process and affects the time limit of delivery. Therefore we propose the automatic data matching system for CAD data's integrity. Proposed system is automatic system supporting subsidiary design works. The data matching system consists of three parts; 1) automatic generation of data tables 2) supporting module for checking CAD data's integrity between Drawings 3) automatic generation of spec. sheets. Developed system was tested in LCD equipment manufacture company and was found to be useful system.

• 정보관리학회지
• /
• 제2권1호
• /
• pp.108-135
• /
• 1985

이용자와 시스템간에 상호작용이 이루어질수 있는 온라인 정보검색 시스템에서는 검색결과에 대한 이용자의 피이드백을 이용하여 검색질문을 수정함으로써 시스템의 성능을 향상시킬수 있다. 본 논문에서는 샐톤과 우가 제시한 검색질문의 자동수정 모형을 통제된 키이워어드 시스템에 적용시켜 보았다.

• 정보관리학회지
• /
• 제10권1호
• /
• pp.97-124
• /
• 1993

본 논문은 자연어 형태의 한국어 텍스트 부터 주제를 대표할 수 있는 색인어를 자동으로 추출하는 실험적인 구문 . 통계적 자동색인 시스템을 구현하였다. 구문 . 통계적 자동색인 시스템은 형태소 분석과 단어 가증 기법을 이용하여 단일어와 명사구를 동시에 선택하는 자동색인 시스템을 말한다. 시스템의 성능을 측정하기 위하여, 300개의 우리말 학술 및 학위논문 초록에서 선택된 단일 . 복합어 색인어를 수작업 색인과 비교하였다. 이와 같은 실험 결과를 가지고 아직 미흡한 연구상태인 우리말 자동색인 개발에 있어서 필요한 기초자료를 제시하였다.

• 국제학술발표논문집
• /
• The 3th International Conference on Construction Engineering and Project Management
• /
• pp.1081-1087
• /
• 2009

An automatic construction system in Korea is now at the stage of the full automation like in Japan, and an actual pilot project is going to be built in 2009. However, in developing a new construction system that has never been implemented before, there is a need to assess the performance and to consider the uncertainty of the system. The program evaluation and review technique (PERT) allows dealing with this uncertainty. Thus, this paper implements an analysis of the process of steel fabrication and makes suggestions for time-related problems arising from the analysis. The time required for steel erection by the automatic system was compared with that in the traditional method. In the result, finding out another construction process and improving robot performance were proposed to resolve the problems. The results will contribute to promoting the development of an efficient system for the new automatic construction system.

• 대한안전경영과학회지
• /
• 제21권4호
• /
• pp.67-74
• /
• 2019

Visual inspection is regarded as one of the critical activities for quality control in a manufacturing company. it is thus important to improve the performance of detecting a defective part or product. There are three probable working modes for visual inspection: fully automatic (by automatic machines), fully manual (by human operators), and semi-automatic (by collaboration between human operators and automatic machines). Most of the current studies on visual inspection have been focused on the improvement of automatic detection performance by developing a better automatic machine using computer vision technologies. However, there are still a range of situations where human operators should conduct visual inspection with/without automatic machines. In this situation, human operators'performance of visual inspection is significant to the successful quality control. However, visual inspection of components assembled into a mobile camera module belongs to those situations. This study aims to investigate human performance issues in visual inspection of the components, paying more attention to human errors. For this, Abstraction Hierarchy-based work domain modeling method was applied to examine a range of direct or indirect factors related to human errors and their relationships in the visual inspection of the components. Although this study was conducted in the context of manufacturing mobile camera modules, the proposed method would be easily generalized into other industries.

• 한국도로학회논문집
• /
• 제15권1호
• /
• pp.155-161
• /
• 2013

PURPOSES: This study is to develop a road traffic sign recognition and automatic positioning for road facility management. METHODS: In this study, we installed the GPS, IMU, DMI, camera, laser sensor on the van and surveyed the car position, fore-sight image, point cloud of traffic signs. To insert automatic position of traffic sign, the automatic traffic sign recognition S/W developed and it can log the traffic sign type and approximate position, this study suggests a methodology to transform the laser point-cloud to the map coordinate system with the 3D axis rotation algorithm. RESULTS: Result show that on a clear day, traffic sign recognition ratio is 92.98%, and on cloudy day recognition ratio is 80.58%. To insert exact traffic sign position. This study examined the point difference with the road surveying results. The result RMSE is 0.227m and average is 1.51m which is the GPS positioning error. Including these error we can insert the traffic sign position within 1.51m CONCLUSIONS: As a result of this study, we can automatically survey the traffic sign type, position data of the traffic sign position error and analysis the road safety, speed limit consistency, which can be used in traffic sign DB.

• 해양환경안전학회:학술대회논문집
• /
• 해양환경안전학회 2018년도 공동국제학술발표회
• /
• pp.76-76
• /
• 2018

• 대한안전경영과학회지
• /
• 제12권2호
• /
• pp.113-123
• /
• 2010

The goal of this study is to analyze an effect of productivity elevation. For the goal, the various methods of the productivity elevation were suggested and the system improvements were conducted. The S company was established in Ban-Wol Industrial Complex, Ansan-City, Kyonggi-Do on 2007. The company was hiring 22 employees. The main manufactures were heavy duty equipment parts and the amount of sale was two billion won on 2008. Problems which the company faced were ambiguous production target management and materials loss. To solve the problems, NCT work improvement and automatic welding were induced. There were steel saving of 3,780,000won/month and man-hour saving of 144,000won/month by redesign of the steel sheet for the NCT steel job. Also, changing from handwork to automatic welding, the man-hour saving for the welding job was 320M/H and saving of 4,225,600won/month. The others of systematic improvement for productivity elevation were usage of jig and daily equipment checklist.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2002년도 하계종합학술대회 논문집(1)
• /
• pp.109-112
• /
• 2002

SNMP is generally used protocol for network management. SNMP need MIB for exchanging management information But, method for sharing MIB is not automatic. General MIB sharing architecture is done by network management operator by manually. In this paper we describe exchanging MIB automatically using meta-MIB. We will formalize SMI as MIB structure. This meta MIB represent information about MIB of NE Agent. Meta MIB has Information of object in the MIB, Structure and index information fur columnar object, meaning of subtype at INTEGER syntax. Also, trap related information is represented too. In this paper, MIB information is represented as instance of meta MIB. This architecture will provide a method for automatic MIB exchanging