• Title/Summary/Keyword: Working Position

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Cooperative Control of Two Spatial Flexible Manipulators -Verification by Experiments- (3차원 양팔 유연 매니퓨레이터의 협조제어 (실험에 의한 검증))

  • Kim, Jin-Soo
    • Journal of the Korean Society for Precision Engineering
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    • v.17 no.9
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    • pp.87-94
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    • 2000
  • In this paper we discuss the control scheme on cooperative control of two flexible manipulators working in 3D space. We propose a control scheme which consists of hybrid position/force control and vibration suppression control. Hybrid position/force control is extended from the scheme for two cooperating rigid manipulators to that for flexible ones. in addition to the control vibration suppression control based upon a lumped-mass-spring model of the flexible manipulators is applied. To illustrate the validity of the proposed control scheme we show experimental results. in the experiment a rigid object is handled by two cooperating flexible manipulators in 3D space.

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Method for Position Estimation of Network Entry Terminal based on DTDMA(Dynamic Time Division Multiple Access) (DTDMA 기반 초기 망가입 단말의 효율적 위치 추정 방법)

  • Seo, Nan Sol
    • Journal of the Korea Institute of Military Science and Technology
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    • v.15 no.5
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    • pp.623-629
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    • 2012
  • In this paper, we analysis the performance of position estimation when adopting Dynamic TDMA(DTDMA) in JTIDS RelNav. JTIDS RelNav is widely understood as a new navigation solution possibly capable to support or take cover of the role of conventional systems including INS or GPS no matter if they are working well or not. By maximizing the efficiency of radio resource management in MAC(Medium Access Control) layer we enhance the system performance without any replacement of hardware.

A Sensorless Switched Reluctance Drive System Based on the Improved Simplified Flux Method

  • Li, Zhenguo;Song, Andong;Ahn, Jin-Woo
    • Journal of international Conference on Electrical Machines and Systems
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    • v.1 no.4
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    • pp.477-482
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    • 2012
  • This paper describes a new rotor position sensorless control method for SRM drives based on an improved simplified flux linkage method. In the traditional simplified flux linkage method, every phases take turns conduction and current chopping control method is used. Every phases take turns conduction means turning on the incoming working phase while turning off the working phase. This conduction mode causes coupling between turn-on and turn-off angles, which goes against optimal efficiency or torque ripple minimization with sensorless speed control. In the improved simplified flux linkage method, turn-off angle is calculated by flux loop, the turn-on angle can be given arbitrarily and has no relations with the turn-off angle, and the current chopping control method is used. The speed and rotor position can be estimated then. Finally, a sensorless SRM speed control system and an experiment platform with DSP are built and validity of this method is confirmed.

Why Can't We Have Both? A Discussion on Work-Life Balance and Women Career Advancement in Malaysia

  • Mustapa, Nursyamsyul Syifa;Noor, Khairunneezam Mohd;Mutalib, Mahazan Abdul
    • The Journal of Asian Finance, Economics and Business
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    • v.5 no.3
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    • pp.103-112
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    • 2018
  • While the number of women labor force in Malaysia is increasing, only a few of them make it to the top. For many reasons, some women turn down top position offer and some of them refuse to stay working. Commitment to the family, work-life conflict and lack of support from the family and the colleagues are among issues that caused women to have less interest to pursue career advancement. This article examines the role of work-life balance and its relationship to women career advancement, and why both are important in Malaysia. The arguments are arranged based on a review of the previous literature to conceptualize the relationship between work-life balance and career advancement. It is found that both work-life balance and women career advancement are important to retain women in the working world as well as to motivate them to pursue promotion to a higher position. Even though some researchers agreed that the relationship between work-life balance and career advancement is mostly negative, others found positive relationship between both constructs. At the end of the paper, some suggestions on how to improve work-life balance and career advancement are presented as well as suggestion for future research.

A Study On Steam Turbine Valve Controls In Power Plant (발전소 증기터빈 밸브제어에 관한 고찰)

  • Choi, In-Kyu;Jeong, Chang-Ki;Kim, Byoung-Chul;Kim, Jong-An;Woo, Joo-Hee
    • Proceedings of the KIEE Conference
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    • 2005.07d
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    • pp.2640-2642
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    • 2005
  • Servovalves are widely used in industrial areas in order to control the position of large steam valves which regulate steam flow to prime mover. We must control the position of large steam valves to regulate flow of working fluids in the process. The small pilot valves are used to regulate the large main valves in case that the pressure of control fluids supplied to servovalves is low about $12kg/cm^2$. But, in case that the pressure of control fluids supplied to servovalves is high enough about $110kg/cm^2$, the pilot valves are not needed and servovalves can control directly the large main valves due to its large working forces. Additionally, the basic structures of armature coil should be different according to the types of control system even in the same servovalve. This paper compares and describes some integral types of flow control.

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Factors Affecting Emergency Room Nurse Job in Small and Medium Sized Hospitals (중소병원 응급실 간호사 업무에 대한 영향요인)

  • Shin, Hyun-Sik;Kim, Jisoo
    • Journal of Korean Academy of Nursing Administration
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    • v.21 no.4
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    • pp.386-392
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    • 2015
  • Purpose: The purpose of this study was to identify the job of emergency room (ER) nurses working in small and medium sized hospitals and to explore factors affecting their job. Methods: The survey data were collected between January 2014 and May 2014 and participants were 159 nurses working in Seoul, Kyunggi, Incheon, and Chungnam in hospitals of less than 500 beds. Results: The score for nurses job was 2.12/4.0, and emergency treatment (1.87/4.0) followed basic nursing (3.51/4.0) and counseling (2.32/4.0). The nursing job was significantly different depending on the age, education level, position, resident doctor(emergency medicine specialty or other) and grade of ER (regional ER or local ER). In the multiple regression, education level (${\beta}=.18$), position (${\beta}=.24$), hospital size (${\beta}=.20$), and grade of ER (${\beta}=.21$) explained 17.0% of variance in ER nurses' job in small and medium sized hospitals. Conclusion: The findings indicate that ER nurses in vulnerable areas do more nursing practice including emergency treatment as well as the usual independent nursing practice. Accordingly, a systematic assignment of nursing professionals is needed to reduce loading of ER nurses in small and medium sized hospitals.

Pain Management Knowledge and Attitude of Internal Medicine and Surgery Stream Nurses (내.외과계 간호사의 통증 관리에 대한 지식 및 태도)

  • Song, Seung-Sun;Park, Chai-Soon
    • Journal of Home Health Care Nursing
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    • v.17 no.1
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    • pp.55-62
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    • 2010
  • Purpose: This study investigated the sought to identify the pain management knowledge and attitude of nurses in internal medicine and surgery stream wards and intensive care units to obtain basic information needed for improved pain control. Method: Data was collected through self-reported questionnaires and analyzed by descriptive statistics, t-test and ANOVA using SPSS Win 12.0. Results: Pain management knowledge score averaged 51.1 out of 100, with significant differences evident depending on age, marital status, educational level, position, total work career, working department and cancer care-giving experience. Pain management attitude score averaged 2.9 out of 4, and significant differences were evident depending on age, marital status, educational level, position, total work career, working department, cancer care-giving experience, education experience and number of patients treated. Conclusion: Further studies are necessary to develop effective nursing knowledge and attitude education programs and evaluation such as discussion by cases, workshops, system of expert help for uncontrollable pain or a multi-disciplinary pain management task force. In addition, patient satisfaction level with pain management should be assessed and the responses reflected practically.

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The Effects of Job Demand and Job Resources on Burnout and Work Engagement of Hospital Nurse Administrators (직무요구와 직무자원이 병원행정직 간호사의 소진과 조직몰입에 미치는 영향)

  • Cha, Woo Jung;Kim, Soukyoung
    • Korean Journal of Occupational Health Nursing
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    • v.29 no.4
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    • pp.262-272
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    • 2020
  • Purpose: This study aims to investigate the degree of job demand, job resources, burnout, and the organizational commitment of administrative nurses based on the job demands-resources model. Further, it seeks to confirm the influencing factors affecting nurses' burnout and organizational commitment. Methods: The participants were 188 administrative nurses working at hospitals (one tertiary hospital and six general hospitals) located in D City. The collected data were analyzed with IBM SPSS Statistics 23.0 using frequency, percentage, mean, standard deviation, t-tests, ANOVA, Pearson's correlation coefficient, and multiple regression analysis. Results: The influential factors of burnout were role conflict (β=.50), job demand (β=.18), job position (β=-.17, team leaders and above), and social support (β=-.15). The regression model had an explanatory power of 59%. The influential factors of organizational commitment were appropriate rewards (β=.59), job position (β=.15, team leader or above), working department (β=.14, referral center and health screening administration department), and social support (β=.18). The regression model had an explanatory power of 59.5%. Conclusion: The results support the job demands-resources model, and interventions should be developed to decrease job demand and provide sufficient job resources.

Development of Auto-Correction Monitoring System for Stud Bolts (스터드 볼트 자동 교정 통합 모니터링 시스템에 관한 연구)

  • Yun, Sung-Un;Kim, Jae-Yeol;Kang, Hyung-Seon
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.24 no.1
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    • pp.130-134
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    • 2015
  • The automobile industry is ubiquitous and involved in the handling of metal, machines, electricity, electron, and chemistry including the products of many types of processes. In the process of installing engines as a part of the car assembly line, the measurement and correction of the position of the stud bolts consumes a great deal of time. Additionally, defective parts must be manually removed. In the process of engine installation, the speed of the operation, related to the economics of vehicle assembly, is dependent upon measuring the precise position of the stud bolt, reducing the length of correction time, and increasing the working rate. This paper deals with securing the economic feasibility of the manufacturing process, increasing the safety by removing risk factors in the working area, and improving and equalizing the quality by developing an automatic system for the process involving a stud bolt.

A Ubiquitous Interface System for Mobile Robot Control in Indoor Environment (실내 환경에서의 이동로봇 제어를 위한 유비쿼터스 인터페이스 시스템)

  • Ahn Hyunsik;Song Jae-Sung
    • Journal of Institute of Control, Robotics and Systems
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    • v.12 no.1
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    • pp.66-71
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    • 2006
  • Recently, there are lots of concerning on ubiquitous environment of robots and URC (Ubiquitous Robotic Companion). In this paper, a practical ubiquitous interface system far controlling mobile robots in indoor environments was proposed. The interface system was designed as a manager-agent model including a PC manager, a mobile manager, and robot agents for being able to be accessed by any network. In the system, the PC manager has a 3D virtual environment and shows real images for a human-friendly interface, and share the computation load of the robot such as path planning and managing geographical information. It also contains Hybrid Format Manager(HFM) working for transforming the image, position, and control data and interchanging them between the robots and the managers. Mobile manager working in the minimized computing condition of handsets has a mobile interface environment displaying the real images and the position of the robot and being able to control the robots by pressing keys. Experimental results showed the proposed system was able to control robots rising wired and wireless LAN and mobile Internet.