• Proceedings of the Korean Radioactive Waste Society Conference
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• 2017.05a
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• pp.49-50
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• 2017

• 전자공학회논문지 IE
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• v.46 no.4
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• pp.66-72
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• 2009

In field of environments, the control and monitoring devices for sewage disposal facilities have been developed to overcome a problem of the water contamination according to industrialization and urbanization. In order to control and monitor the driving motor and the surroundings states of the sewage disposal facilities installed in local stations, this paper presents the design method of efficient module system interconnected by internal network with serial interface. It is expected that the proposed method in this paper is able to provide the more adaptive and flexible design technique for the specification of condition and factors needed in the fast-changed environment market.

• The Korean Journal of Health Service Management
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• v.9 no.4
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• pp.33-49
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• 2015

Objectives : This study was conducted to measure the effects of healthcare accreditation (HA) on the changes in infection control (IC). Methods : Questionnaires were e-mailed to 60 hospitals from 23 October to 23 December, 2011. Data were analyzed by SPSS 12.0. Results : Finally 50 hospitals (83.0%) were enrolled in the study: Seoul area (40.0%), tertiary (76.0%), and >500 beds (98.0%). Nine hospitals (18.0%) had a full time infection control nurse[ICN] with 300 beds. Among various factors, ICN (36.0%), hospital facilities (66.0%), instruments (32.0%) and supplies (88.0%) all improved. Hand hygiene increased (53.1% vs 83.2%, p<.001), but it was continued only in 34.1% of hospitals. Healthcare-associated infection (68.4%), multi drug resistant organisms (42.1%) and outbreaks (26.3%) decreased. Reasons for difficulties in satisfying the HA standards were inadequate support which included hospital facilities, instruments, budget, and a shortage of ICNs and healthcare workers (HCWs). Conclusions : HA had effects on the IC, but they were transient. Staffing in ICN and HCW staffing, hospital facilities, instruments, and supplies all need to be improved.

• Journal of Korean Academy of Nursing
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• v.48 no.2
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• pp.167-181
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• 2018

Purpose: We developed and tested the effects of a coping skill training program for caregivers in feeding difficulty among older adults with dementia in long-term care facilities. Methods: A non-equivalent control group pretest-posttest design was used. The subjects comprised 34 caregivers (experimental group: 17, control group: 17) and 40 older adults with dementia (experimental group: 20, control group: 20). The developed program was delivered in 4-hour sessions over 6 weeks (including 2 weeks of lectures and lab practice on feeding difficulty coping skills, and 4 weeks of field practice). Data were collected before, immediately after, and 4 weeks after the program (January 3 to April 6, 2016). The data were analyzed using t-test and repeated measures ANOVA using SPSS/WIN 20.0. Results: Compared to their counterparts in the control group, caregivers in the experimental group showed a significantly greater improvement in feeding knowledge and feeding behavior, while older adults with dementia showed greater improvements in feeding difficulty and Body Mass Index. Conclusion: The study findings indicate that this coping skill training program for caregivers in feeding difficulty is an effective intervention for older adults with dementia in long-term care facilities.

• Journal of the Korea Society of Computer and Information
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• v.15 no.2
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• pp.91-98
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• 2010

In order to control moving facilities on a remote place effectively, it are required to acquire a environment informations such as images where the moving facilities are placed. However, since there is no tools to acquire such informations to the central control system based on the non-networked sensor environments, it is difficult to control the moving facilities remotely. Therefore, we design and implement the Zigbee based image transmission system and communication protocol to control the moving target remotely. The wireless control utilizing the Zigbee protocol is that electrically consumption is more small than the Bluetooth and reliability of data transmission is better. The implemented Zigbee based control systems and communication protocol have the normal and replay function for a realtime control of the moving target under the server PC and the mobile FDA with the WiFi protocol. The functional operability and performance are analyzed by a designed prototype under the wireless home network environment.

• Journal of The Institute of Information and Telecommunication Facilities Engineering
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• v.9 no.3
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• pp.80-85
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• 2010

In this paper, we present an algorithm for efficient control of backlight LED in order to reduce the power consumption of LCD TV. In addition, a pragmatic implementation method is presented. In conventional local dimming control, backlight LEDs of LCD TV are divided into $M{\times}N$ blocks. And, the proper luminance for each block is computed according to input image and used for dimming control. But, LED light of each block is diffused and affects the neighboring blocks, so that luminance of each block becomes larger than that of intent. In the proposed algorithm, dimming control values are reduced by the amount of quantity affected by the neighboring blocks using light spread function, resulting in additional reduction of power consumption.

• Journal of The Institute of Information and Telecommunication Facilities Engineering
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• v.10 no.3
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• pp.98-102
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• 2011

This paper proposes a method of a touch-based remote control and sensor information acquisition of a mobile robot using a smart phone. An application in a smart phone processes the acquired sensor information and conducts autonomous navigation. By touching the screen of the smart phone, a series of points obtained from designated curve traces are analyzed and provide control of a robot. This study develops a mobile application that acquires and handles data from a mobile robot and sends appropriate action commands through remote control using Bluetooth communication with a smart phone. The utility and performance of the proposed control scheme have been successfully verified through experimental tasks using an actual smart phone and a mobile robot.

• Journal of The Institute of Information and Telecommunication Facilities Engineering
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• v.10 no.1
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• pp.40-45
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• 2011

As increasing the importance of renewable energy recently, the scale of a wind power plant is increasing to the number of GW scale and specially, it is trend to move from onshore to offshore to use the higher quantity and quality of wind. Consequently to meet the trend, it is largely considered the importance of communication protocol to control and monitor remotely. But, because the communication protocol between the control center and a wind turbine has been independently developed by each wind turbine vendor, it is absence of the compatibility and extensibility when the heterogeneous wind turbines are installed in the wind farm. The IEC 61400-25 is the specifying standard for these problems in Europe. In this paper, we will show the state of these problems and present a new structure of communication based on the IEC 61400-25 to get the compatibility and extensibility between a control center and wind turbines.

• Proceedings of the KIEE Conference
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• 2005.07e
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• pp.64-66
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• 2005

Recently, Many water treatment facilities are operated by automatic control or by remote control. These high technology control systems require more stable power supply than before. Badly most automatic control systems adopted in water treatment facilities are non-linear load which generates electrical harmonics inevitably. This study is intended to measure and analyze the electrical harmonics occurred at the chemicals control device which is inverter application circuit, and to show the Method for reduction.

• Journal of The Institute of Information and Telecommunication Facilities Engineering
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• v.3 no.2
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• pp.5-10
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• 2004

In this paper, the hybrid-type current controller for inverter TIG systems was implemented and it was shown that the low-current pulse wave forms with high dynamic performance could be obtained. It is not sri easy to obtain the optimum gain tuning of PID controllers in digital PWM control methods. Hybrid control methods which uses automatic tuning techniques after adding fuzzy control methods to traditional PID controllers are chosen to improve the dynamic performance of PID controller's. To demonstrate the practical significance and dynamic performance improvement of the results, some simulation and experimental results are presented.