• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 2003년도 ICCAS
• /
• pp.1220-1224
• /
• 2003

In this paper, we measured the radiation dose of a fuel handling machine of the CANDU type Wolsong nuclear reactor directly during operation, in spite of the high radiation level. In this paper we will describe the sensor development, measurement techniques, and results of our study. For this study, we used specially developed semiconductor sensors and matching dosimetry techniques for the mixed radiation field. MOSFET dosimeters with a thin oxide, that are tuned to a high dose, were used to measure the ionizing radiation dose. Silicon diode dosimeters with an optimum area to thickness ratio were used for the radiation damage measurements. The sensors are able to distinguish neutrons from gamma/X-rays. To measure the radiation dose, electronic sensor modules were installed on two locations of the fuel handling machine. The measurements were performed throughout one reactor maintenance cycle. The resultant annual cumulative dose of gamma/X-rays on the two spots of the fuel handling machine were 18.47 Mrad and 76.50 Mrad, and those of the neutrons were 17.51 krad and 60.67 krad. The measured radiation level is high enough to degrade certain cable insulation materials that may result in electrical insulation failure.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 2003년도 ICCAS
• /
• pp.2471-2474
• /
• 2003

This paper focuses on the stability and operability of a man-machine system considering a human operator. Some papers' main interest has been the stability only, but the operability such as fatigue is also the other main interest. In a man-machine system, feelings such as motional, visual, and kinesthetic are important since those enable operators to work easily or fatigue operators. A model of a man-machine system has been developed. Motional, visual, and kinesthetic feelings may be considered as feedbacked sensor signals. We also have quantified the degree of fatigue with respect to reference operation. This is a performance index to be optimized. Several methods are presented to optimize the degree of fatigue and the stability of the integrated system. Examples are presented to show that the usefulness of the proposed modeling method and fatigue mitigating algorithm.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 2003년도 ICCAS
• /
• pp.2467-2470
• /
• 2003

In this paper, fault tolerant mechanisms are presented for a servo manipulator system designed to operate in a hot cell. A hot cell is a sealed and shielded room to handle radioactive materials, and it is dangerous for people to work in the hot cell. So, remote operations are necessary to handle radioactive materials in the hot cell. KAERI has developed a servo manipulator system to perform such remote operations. However, since electric components such as servo motors are weak to radiations, fault tolerant mechanisms have to be considered. For fault tolerance of the servo manipulator system, hardware and software redundancy have been considered. In case of hardware, radioactive resistant electric components such as cables and connectors have been adopted and motors driving a transport have been duplicated. In case of software, a reconfiguration algorithm accommodating one motor's failure has been developed. The algorithm uses redundant axis to recover the end effector's motion in spite of one motor's failure.

• 임상간호연구
• /
• 제22권2호
• /
• pp.217-224
• /
• 2016

Purpose: The purpose of this study was to evaluate the effects of safe handling education of antineoplastic drug on knowledge and performance of clinical nurses. Methods: This was a nonequivalent control-group pretest-posttest study. A total of 49 nurses (25 for the experimental group and 24 for the control group) who dealt with antineoplastic drug within the previous 1 week participated in the study. The guidelines for safe handling of antineoplastic drugs and antineoplastic drugs side effects were provided to the experimental groups whereas only antineoplastic drugs side effects was given to the control groups. Knowledge and performance in reference to antineoplastic drug handling were measured before and 8-week after interventions. Results: The knowledge scores between the pretest and posttest were not statistically significant in both groups. However, the performance scores in the experimental group was significantly higher than that of the control group. Conclusion: The given education of safe handling of antineoplastic drugs had an effect on improving clinical nurses' performance. Thus this education could be routinely administered in practice for those who deal with antineoplastic drugs in their everyday practice.

• 대한기계학회논문집A
• /
• 제22권3호
• /
• pp.603-610
• /
• 1998

This paper develops a 7 DOF vehicle model to study the effects of the active suspension on ride. The model is used to derive a control law for the active suspension using a full state linear optimal control technique. A wheelbase preview type active suspension is also considered in the control law derivation. The time delay between wheelbases is approximated using Pade approximation technique. The ride model is extended to a 14 DOF handling model. The 14 DOF handling model includes lateral, longitudinal, yaw and four wheel spin motions in addition to the 7 DOF ride model. A control law which is derived considering only ride related parameters is used to study the effects of the active suspension on a vehicle handling. J-turn maneuver simulation results show that the active suspension has a slower response in lateral acceleration and yaw rate, a bigger steady state lateral acceleration and an oversteer tendency. Lane changing maneuver simulation results show that the active suspension has a little bigger lateral acceleration but a much smaller roll angle and roll motion. Braking maneuver simulation results show that the active suspension has a much smaller pitch angle and pitch motion.

• Human Ecology Research
• /
• 제52권4호
• /
• pp.429-441
• /
• 2014

The use of smartphones has grown rapidly over a short period of time, particularly for commuting news search, smart banking, and social networking services, and has had a significant impact on the pattern of contemporary life. Further, a wide range of applications are downloaded on to smartphones. This has also led a considerable number of complaints regarding these applications. In this study, we focus on the levels of dissatisfaction that users experience with smartphone applications and their effects on consumer complaint behavior along with the moderating effects of the complaint handling process and attribution. The aim of this study is to verify whether the following hypothesis--2 (low/high dissatisfaction level of smartphone applications)${\times}2$ (poor/excellent complaint handling process)${\times}2$ (internal/external consumer attribution)--is in accordance with the betweengroup design to build a factorial design experiment. The results of this study are as follows. First, the consumer's tendency to complain significantly influenced their dissatisfaction level. Second, consumer complaint behavior is modulated by the complaint handling process. Third, the external-attribution tendency of consumers was found to lead to more dissatisfaction than the tendency for internal attribution.

• 한국컴퓨터산업학회논문지
• /
• 제4권4호
• /
• pp.599-606
• /
• 2003

협력적 컴퓨팅 기술이 발전되어감에 따라. 동시 사용자들의 상호 작용이 매우 중요시되어 가고 있다. 따라서, 최근의 CSCW 시스템은 충돌 해결 방식들을 요구하게 되었다. 그러나 현존하는 공동 저작 도구들이나 CSCW시스템들은 충돌 해결 기법에 제한을 갖고 있다. 일반적으로 공동 저작 도구는 특정 사용자의 관점을 기준으로 충돌을 해결하는 해결책을 제시하고 있다. 이러한 방식은 충돌 해결에 가장 빠른 해결책을 제시할 수 있으나, 다른 저작자의 관점은 충분히 반영되지 못한다는 문제가 존재한다. 이 논문에서는 협력적 충돌 해결 방식을 이용한 공동 저작 모델을 제안한다. 제안하는 방식은 저작자들이 자신의 관점을 충분히 반영시킬 수 있으며, 이러한 방식을 통하여 시스템에서는 사용자의 요구에 적합한 컨텐츠를 제공할 수 있다. 제안하는 모델은 XML 등의 구조적 문서의 형태로 표현되는 코스웨어 저작이나 EDI 시스템에 널리 활용될 수 있다.

• 전자공학회논문지
• /
• 제51권4호
• /
• pp.90-97
• /
• 2014

상황인지 시스템은 상황 데이터의 변화에 따라 적절한 서비스를 해주는 시스템이다. 하지만 일상에 적용되지 못하는 이유로 예외 발생 가능성을 들 수 있다. 데스크탑 컴퓨팅 프로그램에서는 C++/C#/JAVA등 프로그래밍 언어에서 예외 처리를 지원하지만 상황인지 시스템에서는 다양한 장비들이 연결되어 있어 개발자의 부담이 커지고 처리의 시점이나 위치를 결정하기 어렵기 때문이다. 따라서 본 논문에서는 프로그래머가 예외를 다루는 데에 있어서 다수의 장비를 지속적으로 탐지할 수 있도록 장비의 의미구조와 AspectJ를 이용한 상황인지 시스템의 예외 탐지 및 처리 방법을 제안한다.

• 전자공학회논문지S
• /
• 제34S권10호
• /
• pp.59-70
• /
• 1997

Until now, considerable progress has been made in the application of range finding techanique performing direct 3-D measurement from the object. However, ther are few use of the method in the area of the application of material handing. We present a range finding vision system consisting of static and dynamic range finders to automate a reclaimer used for material handling. A static range finder detects range data of the front part of the piles of material, and a height map is obtained from the proposed image processing algorithm. The height map is used to calculate the optimal job path as features for required information for material handling function. A dynamic range finder attached on the side of the arm of the reclaimer detects the change of the local properties of the material with the handling function, which is used for avoiding collision and detecting the ending point for changing direction. the developed vision systm was applied to a 1/20 simulator and the results of test show that it is appropriate to use for automating the material handling.

• 복식문화연구
• /
• 제15권6호
• /
• pp.1023-1037
• /
• 2007

The focus of this study was on service recovery process of domestic internet fashion shopping mall, the purposes of this study were to extract perceived interaction effort and service justice with the recovery factors according to service failure by literature review, and to empirically examine the effect this variables on customer satisfaction with complaint handling and loyalty. The questionnaires was administered to 256 internet shopping mall customer, who has experiences of dissatisfaction and complaining behavior after buying fashion products. The data was analyzed by Cronbach's a, confirmatory factor analysis, correlation analysis, and structural equation modeling using LISREL 8.30 program. The results were as follows. First, perceived interaction partly affected serviced justice consumer. Interaction effort on the part of consumer negatively affected interactional justice, but didn't affected distributive justice and procedural justice. However interaction effort on the part of shopping mall positively affected all justice. Second, distributive, procedural and interactive justice positively affected customer satisfaction with complaint handling and loyalty. Finally, customer satisfaction with complaint handling positively affected customer loyalty. The implications of the research and directions for future researchers were discussed.