• Title, Summary, Keyword: MASTER

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Study on a Dynamic master system for Controller Area Network

  • Won, Ji-Woon;Hong, Won-Kee;Lee, Yong-Doo
    • Proceedings of the Korea Society of Information Technology Applications Conference
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    • pp.147-151
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    • 2005
  • CAN(Controller Area Network) is a simple and efficient network system for real time control and measurement. As it is not only good at error detection but also strong in electromagnetic interference, CAN has been widely used all over the industries. Basically, CAN needs a master node in charge of sensor data collection, node scheduling for data transmission to a monitoring system and error detection. According to the number of mater nodes, the CAN system is classified into two type of master system. One is a single master system that has only one master node and the other is a multi-master system where any sensor node can become a master node depending on the system's conditions. While it has the advantage of its fault tolerance, the multi-master system will suffer form the overall performance degradation when a defect is found in the master node. It is because all sensor nodes pertaining to a defective master node lose their position. Moreover, it is difficult and expensive to implement. For a single master system, the whole system will be broken down when a problem happens to a single master. In this paper, a dynamic master system is presented that there are several sub-master nodes of which basic functions are those of other sensor nodes at ordinary times but dynamically changed to replace the failing master node. An effective scheduling algorithm is also proposed to choose an appropriate node among sub-master nodes, where each sub-master node has its precedence value. The performance of the dynamic master system is experimented and analyzed.

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A Study on Adult Women′s Clothing Shopping Orientation and Response to the Shop-master s Attitude (성인여성의 쇼핑성향과 샵마스터의 태도에 대한 반응 연구)

  • 진선영;이선재
    • Journal of the Korean Society of Costume
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    • v.51 no.2
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    • pp.121-133
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    • 2001
  • The study is designed to classify consumer groups based on their clothing shopping orientation and to examine the relationship among clothing shopping orientation, satisfaction to the shop-master, and factors of the shop-master's nature to understand clothing shopping orientation of women from 18 to 35. The final analysis was performed with 447 (consumers) ailed 336 (shop-masters) pieces of questionnaire. The data was analysed with SAS statistics package. The results of this study are as follows : 1. Clothing shopping orientation were composed of four dimensions : recreational shopping orientation, convenience/economic shopping orientation, store/brand loyalty shopping orientation, and shopping confidence. 2. In the satisfaction to the shop-master, the consumer was not satisfied by the appearance, product-presentation, and consumer-management of the shop-master but kindness, trust, and product-explanation by the shop-master. The shop-master guessed that consumers were completely satisfied. 3. The consumer had an influence on product-understanding, response, and consumer-understanding of the shop-master, and the shop-master guessed that consumers had an influence on every thing of shop-master. 4. The more consumers were store/brand loyal, the more they were satisfied with tole shop-master, and had an influence on the factors of the shop-master's nature. But consumers were confident on the shopping, were not shown to be significantly different in the satisfaction of the shop-master and the factors of the shop-master's nature.

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A master-slave control for telerobot using a non-actuated master arm (비구동 매스터 암을 이용한 원격로봇의 매스터-슬래이브 제어)

  • 황석용;김승호
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1692-1695
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    • 1997
  • In this paper, a new control scheme for master-slave control of telerobot is proposed. The porposed method can be classified into unilater master-slave control methods in the aspect of the data flow. But the master arm in the proposed control scheme can deliver operator the similar kinesthetic sense as other bilateral force reflecting master arms do. The principle concept is that the sensed operator's force/torque is used as the reference input for a damping controller type of telerobot controller which track the operators efforts. Master arm and master controller can be implemented in a simple form, and it needs not be driven by actuators, but force sensing capability.

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A Fast-Recovery Algorithm for Scatternet Reformation in Bluetooth Networks (블루투스 네트워크에서 스캐터넷 재구성을 위한 Fast-Recovery 알고리즘)

  • Zhang, Fan;Gu, Myeong-Mo;Kim, Sang-Bok
    • Journal of the Korea Society of Computer and Information
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    • v.12 no.6
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    • pp.251-259
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    • 2007
  • A Bluetooth ad hoc network can be formed by interconnecting piconets into scatternet. Many algorithms of scatternet formation have been proposed so far. However, these have a problem that takes a long time to reform scatternet, especially for the case of master moving out. In this paper we propose a Fast-Recovery algorithm. which aims at reducing the time of scatternet reformation owing to master moving out. In the algorithm, we select a slave with the weigh similar to its master as Sub-Master from a piconet device table created by the master When a master leaves its piconet is detected by its slaves, the Sub-Master becomes the new master of the piconet instead of the old and directly connect to other slaves and bridge(s) through piconet device table in page state.

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A Haptic Master-Slave Robot System : Experimental Performance Evaluation for Medical Application (의료용 햅틱 마스터-슬레이브 로봇 시스템 : 실험적 성능 평가)

  • Oh, Jong-Seok;Shin, Won-Ki;Nguyen, Phuong-Bac;Uhm, Chang-Ho;Choi, Seung-Bok
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.421-427
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    • 2012
  • In this work, 4 DOF ER haptic master is proposed and integrated with a slave robot for minimally invasive surgery (MIS). Using a controllable ER fluid, the haptic master can generate a repulsive force/torque with the 4-DOF motion. For realization of master-slave robot system, the motion command of the haptic master is realized by slave surgery robot. In order to follow the 4 DOF motion of the haptic master, novel mechanism of slave surgery robot with gimbal joint is devised. Accordingly, the haptic master-slave robot system is established by incorporating the slave robot with the haptic master device in which the desired repulsive force/torque and position are transferred to each other via wireless communications. In order to obtain the desired force/torque and position trajectories, tracking controllers for haptic master and slave robot are designed and implemented, respectively. It has been demonstrated that the desired effective torque tracking control performance is well achieved using the proposed haptic master-slave robot system.

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A Haptic Master-slave Robot System : Experimental Performance Evaluation for Medical Application (의료용 햅틱 마스터-슬레이브 로봇 시스템 : 실험적 성능 평가)

  • Oh, Jong-Seok;Shin, Won-Ki;Nguyen, Phuong-Bac;Uhm, Chang-Ho;Choi, Seung-Bok
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.23 no.1
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    • pp.41-48
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    • 2013
  • In this work, 4-DOF ER haptic master is proposed and integrated with a slave robot for minimally invasive surgery(MIS). Using a controllable ER fluid, the haptic master can generate a repulsive force/torque with the 4-DOF motion. For realization of master-slave robot system, the motion command of the haptic master is realized by slave surgery robot. In order to follow the 4-DOF motion of the haptic master, novel mechanism of slave surgery robot with gimbal joint is devised. Accordingly, the haptic master-slave robot system is established by incorporating the slave robot with the haptic master device in which the desired repulsive force/torque and position are transferred to each other via wireless communications. In order to obtain the desired force/torque and position trajectories, tracking controllers for haptic master and slave robot are designed and implemented, respectively. It has been demonstrated that the desired effective torque tracking control performance is well achieved using the proposed haptic master-slave robot system.

A Study on Demanders' Consciousness by Master Room Planning Types in Apartment House (공동주택에서 마스터룸(Master room) 평면 유형별 수요자 의식 조사 연구)

  • Cho, Sung-Woo;Lee, Su-Yong;Moon, Cul-Seong;Oh, Se-Gyu
    • Journal of the Korean housing association
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    • v.19 no.6
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    • pp.9-20
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    • 2008
  • The residential environment is a place which reflects the gradual evolution of human consciousness because it is a cultural space the term, 'houses' is not relevant in this context as it literally means 'contains'. The long history of human living habits cannot be 'contained' within a space, but can be 'expressed' by a space and by the way the space is used. Furthermore, due to the way it is typically constructed, the basic characteristics of the house usually cannot be rapidly changed to accommodate new habits. However, recent changes that have taken place to the characteristics of the traditional master room suggest that traditional societal values associated with patriarchy have diminished. The current trend where priority is given to children's education also affects such a change. Existing researches related to the master room is confined to the behavioral use of the space and the composition of the physical space, while research on the master room its plane type has not been carried out. Therefore, in this study, apartment model houses are selected, and are classified according to the types of master room. An analysis is then carried out of the master room based on the occupants' requirements in terms of consciousness. Any planning modifications where required are then suggested. This research comprises the followings stages. First, an examination is carried out of existing research on the master room in order to understand its background and spatial components. A definitiones of related terms is also provided. Second, an analysis is carried out of the model houses exhibited at Suwan District, examining the typical standard that has been selected for the master room. Third, an analysis is conducted of the topics and questions to be selected for a questionnaire. Fourth, an analysis is carried out of the consciousness, satisfaction and requirements of the residents, as respondents in the questionnaire, related to the master room. and Research is then conducted of the architectural methods for planning the master room. Finally, future countermeasures for planning the master room are described based on the above analysis and research findings.

Application of the HELIOS-MASTER Code System on the Criticality Analysis for the SMART-P Spent Fuel Storage (SMART연구로 사용후 연료 저장조의 임계해석에 HELIOS-MASTER계산체계의 적용)

  • Kim, Ha-Yong;Koo, Bon-Seung;Kim, Kyo-Youn;Lee, Chung-Chan;Zee, Sung-Quun
    • Journal of Radiation Protection and Research
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    • v.30 no.2
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    • pp.61-67
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    • 2005
  • The criticality analysis method using HELIOS-MASTER code system, which is the nuclear core analysis code system, was developed for the spent fuel storage of SMART-P reactor. We generated the macroscopic cross section of the geometric model with HELIOS and estimated the criticality of the 3-dimensional model with MASTER for SMART-P spent fuel storage. The validity of criticality analysis method for SMART-P spent fuel storage with the HELIOS-MASTER code system by 3-D MCNP calculation was also verified. The result of the criticality analysis with the HELIOS-MASTER code system is more conservative than that with the MCNP and the accuracy of this result is within the range of an allowable error. Because HELIOS-MASTER can perform the 3-D depletion calculation lot a spent fuel storage, it will be useful to perform the criticality analysis including a burnup credit in future.

A Study on the Reason for Change of Master Plan of Hospital Architecture in Design Process (병원건축 마스터플랜이 설계과정에서 변경되는 원인에 관한 연구)

  • Park, Cheolkyun;Yang, Naewon
    • Journal of The Korea Institute of Healthcare Architecture
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    • v.24 no.4
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    • pp.7-15
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    • 2018
  • Purpose: The life span of a hospital building is short. This is because the building will have to be built up due to the fact that it can not cope with the new medical environment, it can not be replaced due to low floor height, lack of land. The purpose of the hospital building master plan is to find a way to fulfill its role in the long term. Methods: Comparison the proposals submitted by the master plan and the proposals submitted by the hospitals, the case of three hospitals that have established a master plan for the past three years. In addition, interviews with the designers who participated in the design competition and the administrator of hospital about the variables that occurred during the business process. Results: The result of this study can be summarized into four points. The first one is that master plan is changed by administrator of hospital so that Thy need to understand about the role of master plan. And next is to protect reduction of the project cost. Third, continuous participation of master plan researchers in following projects is good to communicate with administrator and designer. The last one is empathy of master plan by designer and users. Implications: It is necessary to reduce changing of master plan in design process for sustainable managing of hospital.