• 한국디지털정책학회:학술대회논문집
• /
• 한국디지털정책학회 2005년도 추계학술대회
• /
• pp.411-424
• /
• 2005

A large scale automated material handling system (AMHS) is simulated using real industrial input data to analyze its performance so that one can scrutinize the critical factors that affect the AS/RS performance. The factors included in this study are line balancing efficiency, the distance between machines, and cycle time of the machines. The performance of AS/RS is measured in terms of R/M utilities that are latter used to classify the AS/RS structure into three types such as Good, Normal, and Poor. Among the three factors considered in this study, the line balance efficiency within each AS/RS is found as the most critical factor which statistically affect the AS/RS performance.

• 한국국방경영분석학회지
• /
• 제27권2호
• /
• pp.25-36
• /
• 2001

In this paper a new heuristic algorithm has been developed and presented for logistics for multiple objectives in an automated manufacturing systems. We proposed Simallest Processing and Average setup time Ratio First(SPARF) algorithm for multiple criteria under sequence setup time. The heuristic algorithm is implemented on the various problem cases by number of jobs and machines. The proposed algorithm provided smaller than the previously documented heuristics. The results obtained show a superior solution by the new heuristic over previous heuristics on all problem sizes. we perform analyses of variance to fortify the above results of comparison with the previous algorithms to the four cases using Statistical Analysis System(SAS) package. The results show that the larger is the number of groups or cells, the bigger is the amount of improvement by the proposed algorithms. It suggests that the algorithms proposed is strongly influenced by the number of cells, groups and interaction of these factors.

• Journal of Positioning, Navigation, and Timing
• /
• 제12권3호
• /
• pp.281-288
• /
• 2023

The International Maritime Organization (IMO) states that the recommended horizontal accuracy for coastal and offshore areas is 10 m, the Alert Limit (AL) is 25 m, the time to alert is 10 seconds, and the integrity risk (IR) is 10^-5 per three hours. For operations requiring high accuracy, such as tugs and pushers, icebreakers, and automated docking, the IMO dictates that a high level of positioning accuracy of less than one meter and a protection level of 0.25 meters (for automated docking) to 2.5 meters should be achieved. In this paper, we analyze a method of calculating the user-side protection level of the centimeter-level precision Global Navigation Satellite System (GNSS) that is being studied to provide augmentation information for the precision Positioning, Navigation and Timing (PNT) service. In addition, we analyze standardized integrity forms based on RTCM SC-134 to propose an integrity information form and generate a centimeter-level precise PNT service plan.

• 한국재난관리표준학회지
• /
• 제1권2호
• /
• pp.73-78
• /
• 2008

전 세계적으로 대규모 재해 발생 빈도가 증가하고 그 피해가 심각한 상황에 이르고 있다. 최근 IT 기술과 remote sensing 기술의 발전과 더불어 재해관리 분야에 이러한 기술을 적용하기 위하여 많은 연구가 진행되고 있다. 본 연구에서는 IT, remote sensing, GIS 기술을 통합하여 재해 발생 이후 신속한 피해현황 파악과 대책 수립을 위한 시스템을 개발하였다. 이 시스템은 지상에서 피해현장을 촬영하여 피해물량을 정량적으로 산출하고 피해시설에 대한 정성적인 정보를 실시간으로 확인함으로써 신속한 대응책을 마련하고 객관적인 복구 예산운용을 위한 시스템이다. 또한 위성영상 및 항공사진, GIS 시스템 기반의 피해정보관리시스템에서 피해지역의 위치 및 실시간으로 수집된 정보를 토대로 전자재해대장 및 피해현황도 작성이 가능하도록 하였다. 본 연구를 통해 첨단 기술 기반의 재해 정보를 관리함으로써 신속한 대응이 가능하며 공간영상과 GIS 기반의 효율적 재해정보 관리가 가능할 것이다.

• 한국작물학회지
• /
• 제34권s01호
• /
• pp.33-39
• /
• 1989

Ethylene gas classified as one of five major plant hormones plays an important role in various plant metabolism. The precise analysis of ethylene production of plants or plant parts is a valuable research procedure because knowledge of ethylene production facilitates measures of the physiological activity within the tissue. This paper describes procedures for analyzing ethylene from plant tissues by gas chromatography and discusses problems associated with extracting gas samples either by introducing a vacuum to plant samples or by using a hypodermic syringe. Introduced are a continuous flow system for efficient analysis and an automated system for sampling, analyzing, calculating and recording ethylene production data.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 1992년도 한국자동제어학술회의논문집(국제학술편); KOEX, Seoul; 19-21 Oct. 1992
• /
• pp.118-123
• /
• 1992

Analysis is made for a fish-drying process control in order to implement a human expertise into an automated fish drying system. Together with the idea described in the companion paper, a methodology is found effective in a general drying system other than fish drying.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2005년도 춘계학술대회 논문집
• /
• pp.181-186
• /
• 2005

In this paper, an estimation system of vehicle position and orientation on magnetic lane, which is a parameter of the steering controller for automated lane follwing is described. To verify that the magnetic dipole model could be applied to a magnetic unit paved in roadway, the analysis of the the data 3-axis magnetic field measured experimentally.

• 한국소음진동공학회논문집
• /
• 제16권12호
• /
• pp.1208-1214
• /
• 2006

ATM(automated-teller machine) is a machine that receives and pays money directly. The double bill detector(DBD) module of an ATM detects double bills from its thickness. In this paper, the dynamic behavior of the DBD was analyzed, which cannot be simulated correctly by a package program of SAMCEF. And the displacements of the lever was measured for various bills experimentally. The measured dynamic behaviors were analyzed kinematically using a vector equation and simulated dynamically by the derivation of equation of motion with consideration of damping and stiffness of the DBD and bills. The analysis showed that the spring constant of the system is not so influential, instead, the contact angle between the lever and bill needs to be larger than the existing DBD in order to be laster and reliable DBD.

• Journal of Communications and Networks
• /
• 제12권4호
• /
• pp.382-394
• /
• 2010

Cross-domain event information sharing is a topic of great interest in the area of event based network management. In this work we use data sets which represent actual attacks in the operational Internet. We analyze the data sets to understand the dynamics of the attacks and then go onto show the effectiveness of sharing incident related information to contain these attacks. We describe universal data acquisition system for event based management (UniDAS), a novel system for secure and automated cross-domain event information sharing. The system uses a generic, structured data format based on a standardized incident object description and exchange format (IODEF). IODEF is an XML-based extensible data format for security incident information exchange. We propose a simple and effective security model for IODEF and apply it to the secure and automated generic event information sharing system UniDAS. We present the system we have developed and evaluate its effectiveness.