• The Journal of the Korea institute of electronic communication sciences
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• v.9 no.3
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• pp.369-376
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• 2014

Recent climate change and ensure each country's marine fisheries resources due to the sharp decline to address the eco-friendly farming has emerged. Marine aquaculture operations to provide ease of use for the fishing ship cranes. In this paper, we use the default handler for the shipping cranes and improve the working environment of the received video equipment in the work area through the monitoring and analysis of visual information to optimize the image, convenient and high visibility for workers to have real-time video guide system is proposed.

• Journal of Digital Convergence
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• v.13 no.8
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• pp.281-288
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• 2015

The container terminals use convergence technology that exchange information for cargo work, using wireless communication between the TOS(Terminal Operations System) and the handling equipments(CC, TC, YT). But if the container cargoes pile up high in the container yard, delayed cargo work and cargo working list information error happen because of communication dead spots(the worker can not receive the information) which wireless communication is disconnected. At this time the driver of the yard tractor(YT) must be able to recognize the communication state. If then, delayed cargo work and cargo working list information errors that occur in the shaded communication area can be avoided, and can process the delayed work due to wireless communication break. In this project, we have built wireless communication environment to increase the efficiency of the loading and unloading operations which the operator can respond actively, when the work is delayed and work orders result in errors. That is, the flow of the wireless communication module has been changed.

• Journal of the Korea Convergence Society
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• v.10 no.7
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• pp.335-342
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• 2019

The purpose of this study was to investigate the current status of work-related upper extremity musculoskeletal pain in baristas and to identify the elements that are related to pain. The questionnaires were distributed to 100 workers in 63 cafes on Jeonju city in Korea. As a result of investigating work related pain, 65.3% (n=64) answered "yes" to the question that had pain at least once a week, month, or year, or 34.7% (n=34) answered "no". Most of the workers were right-handed, and when they felt pain, they felt 25 to 50% of time per day. Especially, baristas reported that the use of porter filters during work and the tamping operation were the most painful. In conclusion, our study indicated that necessary to introduce and develop a program to prevent cafe worker disease, as well as need to future research to improve work environment and posture according to the characteristics of the cafe works.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.2
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• pp.484-492
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• 2017

This study assessed female occupational therapist job stress and musculoskeletal pain, and examines the problems caused by sexual harassment, family, and marriage policy. The results provide information to improve work environments, reduce job stress, yield data needed for sexual harassment prevention education, examine women occupational therapists' economic activities, and broadly improve the quality of life through participation. The study subjects were currently employed female occupational therapists. Initially 200 subjects were recruited, of whom 185 returned the study questionnaire. Questions addressing job stress included, 'There are times when one feels that the salary is worth less than the job effort', 'Feel tired due to work.', 'That it is time to pay attention to other therapy.', answered positively in that order. Musculoskeletal pain in the wrist and hand (90%), shoulder (86%), neck (69.7%) and waist (68.6%) were the order of the wrist and hand (63%), shoulder (62.2%) and waist (51.9%) pain resulted in interference with daily life. Verbal harassment was reported by 71.4% and 48.6% reported physical and visual harassment. The most common topics in workplace relations were 'Must choose whether to focus on the individual or work (61.1%).', 'Need for understanding and someone who can share their feelings (54.6%).', and 'Colleagues are willing to listen to my story (73%)'.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.148-148
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• 2016

홍수범람지도는 치수 대책 수립 등 다양한 목적으로 국내 주요하천에서 작성되고 있으며 범람 구역의 정확도를 높이기 위한 노력이 다각도로 수행되고 있다. 최근, 공간적으로 매우 정밀한 LiDAR 측량 성과를 기반한 DEM을 이용하거나 2차원 혹은 3차원 수치모델링을 적용하여 범람지도의 정확성 및 적용성이 획기적으로 개선되고 있다. 또한, 범람구역의 불확도에 관련된 연구도 다수 수행되고 있다. 그러나, 이러한 성과는 정밀 DEM 자료가 가용하거나 치수의 중요도가 높은 국가하천 지역에 국한되고 있으며 중소하천을 포함한 국가 전체 홍수지도 작성은 여전히 제한적으로 수행되고 있다. 중소하천의 경우, 공간해상도 및 정확도가 낮은 DEM과 1차원 모델링에 기반하여 범람지도의 신뢰도가 여전히 낮은 실정이다. 또한, 홍수지도 작성 기법은 비교적 잘 알려진 상황이나 작성 과정은 상당한 시간이 필요한 작업으로 지도 작성 시 실무에서 많은 비용과 시간이 소요되고 있어, 결과적으로 중소하천을 포괄한 홍수범람지도 작성에 장애요인으로 작용하고 있다. 따라서, 본 연구에서는 기존 하천기본계획에서 확보될 수 있는 하도단면 측량 등 표고 측량 성과를 활용하여 공간 해상도가 상대적으로 낮은 DEM을 정교화 및 상세화할 수 있는 개선기법 및 복잡한 범람지도 작성과정을 자동화하여 작성 소요시간을 현저히 줄일 수 있도록 하는 GIS 기반의 홍수범람지도 작성 자동화 툴을 개발하였다. 개발된 GIS 기반의 자동화 툴은 AIM(Automated Inundation Mapping tool)로 명명되었으며 ESRI사의 ArcObjects를 활용하여 개발되어 ArcGIS 기반으로 운영되며 현재 HEC-RAS 홍수위 자료가 입력자료로 작동되도록 설계되었다. 개선된 DEM과 AIM은 시범적으로 제주도 한천 하류에 적용되었으며 2007년 태풍 나리 시 발생한 범람흔적도와 비교했을 때 기존 방식에 비해 범람지도의 정확도와 작성시간(10초 가량 소요)이 상당부분 개선되었다.

• The Journal of the Korea institute of electronic communication sciences
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• v.13 no.2
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• pp.463-472
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• 2018

The aim of this pilot survey was to investigate the presence status, usage problems, and improvement needs of the upper extremity rehabilitation equipment(: UERE) in the department of occupational therapy(: OT) of hospital setting in Korea. The authors received a questionnaires of clinicians working in a department of OT hospital setting through a social network service. Responses of 72 were analyzed in the first questionnaire, and 47 were analyzed in the second questionnaire. In the first questionnaire, the presence status of 16 UERE was confirmed to be 29.2~97.2%, and the usage experience of 9 UERE in the second questionnaire was 36.2~97.9%. In the second questionnaire, UERE's usage problems were reported discomfort in 15(31.9%) of 47 therapists, and improvement needs were 23(49%). The usage problems of the 9 UERE questioned by open-ended questionnaire were uninteresting, easily damaged, level unadjustable, direction unadjustable, and inconvenient installation. The improvement needs were classified into digitization, durability, level adjustable, adjustable function, convenience. The present pilot survey identified the presence status and usage experience of UERE in the department of OT and could be used as a basis for the development of closed-ended questionnaire on usage problems and improvement needs of UERE.

• Journal of KIISE:Computing Practices and Letters
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• v.8 no.4
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• pp.411-422
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• 2002

Recently, there have been active researches about the VPCS (Virtual Parallel Computing System) based on multiple agents. The PVCS uses personal computers or workstations that are dispersed all over the internet, rather than a high-cost supercomputer, to solve complex problems that require a huge number of calculations. It can be made up with either homogeneous or heterogeneous computers, depending on resources available on the internet. In this paper, we propose a new method in order to distribute worker agents and work packages efficiently on the VPCS based on the IBM Aglets. The previous methods use mainly the master-slave pattern for distributing worker agents and work packages. However, in these methods the workload increases dramatically at the central master as the number of agents increases. As a solution to this problem, our method appoints worker agents to distribute worker agents and workload packages. The proposed method is evaluated in several ways on the VPCS, and its results are improved to be worthy of close attention as compared with the previous ones.

• Journal of the Korea Institute of Building Construction
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• v.17 no.5
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• pp.419-427
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• 2017

In order to examine the possibility of practical use of aluminate cement concrete at low-temperature environment with insulation method, an experimental studies on flowability, setting time, freezing temperature, size variation and compressive strength of the mortar at low-temperature were conducted. Compressive strength was increased in use of CSA, aluminate cement with gypsum. Workability and physical properties were improved by using aluminate cement and gypsum. In addition, freezing resistance and physical properties were improved by applying the insulation curing method. Especially, when alumina cement and gypsum were used together, the insulation curing method was more effective in improving the compressive strength.

• 전자공학회논문지 IE
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• v.46 no.4
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• pp.25-30
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• 2009

The cooling water circulation pipes had been used to drop the temperature of refractory outside shell of blast furnace by cooling plate or stave type. They were attacked by surrounding CO gas and it was the cause that they were corroded and the water inflow in the refractory due to leakage of water. So, the life of refractory material was shorten and changed for the worse the conditions of blast furnace. The automatic sensing device for water leakage of cooling pipe was developed to check the position of trouble by use the micro-process system when cooling water leak and then CO gas will be inflowed into the cooling pipe at the leakage position. The inflowed CO gas will be detected in the micro-process system and delivered the detected position of cooling plate or stave to main control room through the wireless-radio relay station. This system can be possible to detect the position of cooling plate or stave the water leakage part immediately and then deliver the signal to main control room by use the micro-process system and wireless-radio relay station. This system will develop the working condition from manual system to unmanned auto alarm system.

• Proceedings of the Korean Nuclear Society Conference
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• 1997.05a
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• pp.207-212
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• 1997

영광2호기에 설치되어있는 노내 중성자속 감시 계통 설비인 기계식 인출제한 스위치(Withdrawl Limit Switch)의 구조적인 결함을 제거하기 위한 원인 분석 및 개선과정에 중점을 두었다. 기계제어방식의 구조적 결함은 검출기(Detector)가 노심의 중성자속(Neutron Flux)을 측정하기 위해 구동기의 수동 혹은 자동운전시 검출기 안내관에 삽입 인출이 반복 수행되면서 물리적 또는 환경적요인에 의한 레버의 휘어짐으로 접촉위치의 변경이 발생하는 것을 의미한다. 콘솔내 다수의 마이크로-프로세서(Multiple-Microprocessors)에 의한 구동기(Drive Unit) 동작으로 노심내 3차원 중성자속 분포를 측정할 수 있는 유일할 설비로써 본 계통은 그동안 관련 보수작업 및 설비개선에도 불구하고 근본문제점이 해소되지 못한 가운데 여러차례의 설계, 모의시험을 거쳐 인출제한스위치 제어 방식을 기계식에서 전자식으로 개선, 대체하여 시험 및 운전해 본 결과 근본적 결함원인이 해결되었음을 확인하였다.