• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.51.4-51
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• 2001

In order to comprise a basic closed-loop control system for a field robot it is necessary to detect the piston rod stroke of a hydraulic cylinder. There are mary conventional type sensors which can detect the displacement of cylinders. However, they cannot reveal the original performance normally or the cannot be applied at all where the operating circumstance of cylinders is beyond specifications of sensors. In this paper, an exclusive method for detecting the piston rod stroke is suggested, which adopts a remote detecting technique using optical fiber sensors. Several experiments using the prototype are executed for verifying the effectiveness of the suggested method and the possibility of the accurate detection of stroke.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1992년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 19-21 Oct. 1992
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• pp.906-911
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• 1992

We deals with stationary layout control system of AGV. It is a intelligent contorl system to be wholly charged control PC a layout information and guided command and to be controlled a vehicle driving, steening, safety of natural functions of AGV. Fieldbus concentrator of stationary layout control system serves control command from control PC and status information of AGV. Telegram software monitors transmitted command and status information through IR (Infrared) modem. Epecially it is possible to easily network to use not an exclusive controller of AGV but

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권8호
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• pp.3048-3067
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• 2021

This study examines the similarities and differences between the causes of juvenile delinquency in online and offline environments and in personal characteristics. The study utilizes data from the '2014 Survey on Juvenile Victimization in Korea'. The population of this survey is students attending middle and high schools across the country. While this paper is based on the Self-Control theory, opportunity factors based on the Routine Activity theory and the Situational Action theory are also applied. Results show that the causes of offline delinquency are low self-control, routine activity and frequent gaming and SNS use. The causes of online delinquency are high self-control, existence of communication with unknown persons and the spectrum of personal information online. The common element of offline and online delinquency was the presence of delinquent peers. These results show that while online and offline delinquency cannot be explained with the same methodology, at the same time they are not mutually exclusive.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.68.2-68
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• 2001

A position control system using hydraulic cylinder is modeled as a nonlinear system. In order to control this nonlinear system, in this paper, the fuzzy PID control technique which has time-varying control parameters is adopted. In this study, an exclusive sensor to detect the position of hydraulic cylinder is used, which is embeded in hydraulic cylinder.

• 연구논문집
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• 통권22호
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• pp.27-38
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• 1992

We deals with stationary layout control system of AGV. It is a intelligent control system to he wholly charged control PC a layout information and guided command and to be controlled a vehicle driving, steering, safety of natural functions of AGV. Fieldbus concentrator of stationary layout control system serves control command from control PC and status information of AGV. Telegram software monitors transmitted command and status information through IR(JnfraRed) modem. Especially it is possible to easily network to use not an exclusive controller of AGV but personal computer(PC) when communicate and interface a different kind of controller.

• 한국정보통신학회논문지
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• 제26권7호
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• pp.1091-1097
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• 2022

본 논문에서는 배타적 논리합 연산을 활용한 비디오 스트리밍 기술인 eXclusive OR-based Cast(XC) 시스템을 구현하고, 근거리무선망 환경에서 다양한 성능지표들을 측정한다. 또한, 기존 연구들이 제한적 환경에서 시뮬레이션을 통하여 성능을 분석한 반면, 본 연구에서는 다양한 실질적인 비디오 스트리밍 환경들을 고려하여 XC 시스템의 성능 개선 정도를 확인한다. 이를 위해서 클라이언트들이 서버로 전송하는 STR_REQ_MSG (SRM)와 스트리밍 서버가 클라이언트들을 제어하기 위한 STR_CON_MSG (SCM)와 같은 새로운 제어 메시지들을 제안하고 이들을 활용하여 프로토콜을 설계하였다. 구현한 XC 시스템을 활용한 다양한 성능 측정 결과에 따르면, XC 스트리밍 시스템은 기존 스트리밍 시스템 대비 네트워크 대역폭 소모량을 평균적으로 8.6% 그리고 최대 약 25%까지 줄일 수 있다. 또한, 스트리밍 서비스의 중단 확률은 약 76%까지 낮아진다.

• 한국농공학회:학술대회논문집
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• 한국농공학회 1999년도 Proceedings of the 1999 Annual Conference The Korean Society of Agricutural Engineers
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• pp.99-104
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• 1999

In 2000 FFIA , FIA, RDC are united into new corporation. This corporation will manage rural water with TM/TC(Tele-Monitoring/Tele-Control) system. Most systems which were adopted in TM/TC system were Closed Control System which use exclusive network and protocol . Closed Control System can not support new corporation's requirement in water management system. Therefore, new corporation should adopt Open Control System as standard rural water management system. Open Control System support Fieldbus technology, TCP/IP various protocols, programming model, OPC which is essential to the water management program, and so on.

• 한국안광학회지
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• 제5권2호
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• pp.33-42
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• 2000

본 연구는 콘택트렌즈를 사용하는 사람들을 대상으로 렌즈 보존케이스의 위생상태를 조사하기 위해 마산의 N 안경원을 내원한 고객을 대상으로 사용실태에 대한 교환한 보존케이스의 세균검출여부를 실험을 통한 연구 결과는 다음과 같다. 1) 보존케이스소독방법은 15~19세는 식염수(43.6%), 20~24세도 식염수(33.3%), 25세 이상은 끓는물(26.3%)이 가장 많이 사용하는 방법으로 나타났고(p< .001), 신분별로는 학생은 식염수, 전문보존용액, 하지않는다 순이었고 일반인은 식염수, 끓는물, 하지않는다 순이었다(p< .001). 2) 보존케이스세척액종류는 주로 식염수를 많이 사용하고 있었으며 특히, 경제수준별로는 가장 많이 이용하는 식염수가 상에서는 85.7%, 중에서는 48.0%, 하에서는 44.4%로 나타났다(p< .01). 3) 보존케이스보존액종류는 신분별로 학생은 전문보존용액이 74.6%, 식염수가 25.4%였고 일반인은 전문보존용액이 64.2%, 식염수 32.1%, 생수와 수돗물이 각각 1.9% 순이었다(p< .05). 4) 보존케이스 총 70개 중 66개(94.3%)에서 박테리아가 검출되었고 33개(47.1%)의 보존케이스에서 Serratia marcescens가 분리되었다.

• 한국생산제조학회지
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• 제6권2호
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• pp.92-101
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• 1997

The purpose of this welding process of the exclusive welding-machine using welding torch-rotation type is to develop a mechanism which can solve the problem of twisting of welding wires and cables. The technique was developed by revising the torch position and smooth controlling of both the normal and reverse rotation. Some of the advantages of using the torch-rotation type apply to the work-rotation technique are the practical uses of increased work space and link work with the factory automation system. Do apply the welding process, I designed and made a special unit so called torch part in order to solve the problems of kinematical. And I made a control panel which can manipulate the progress of the entire process at the work shop. Even if it will be applied to another kind of axle casing's welding work, this process can be utilized if other sizes of the fixed pin and work part is produced and changed. The development of this exclusive welding-machine could reduce the manpower of skilled welding labor and increase productivity and better quality product in comparison to the handmade product.

• 한국환경과학회지
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• 제25권7호
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• pp.937-950
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• 2016

Algal blooming in 4 major rivers introduces substantial impacts to water front activity. Concentrations of algae are increasing at major points along the Geum River. Ecosystem food webs can be affected by algal blooming because blue-green algae release toxic materials. Even though there have been many studies on blue-green algae, its causality to environmental factors has not been completely determined yet. This study analyzed the exclusive correlation between various hydrometeorological, water quality, and hydrologic variables and the cell number of cyanobacteria to understand causality of blue-green algae in the Geum River. A prewhitening process was introduced to remove the autocorrelation structure and periodicity, which is useful to evaluate the effective relationship between two time series.