• Transactions on Control, Automation and Systems Engineering
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• v.4 no.1
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• pp.38-42
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• 2002

Conditions are discussed for operating a dissymmetric human master-small (or micro) slave system in best (large position gain-small velocity gain) conditions allowing higher operator dexterity when real effects (joint compliance, link flexion delay and transmission distortion) are taken into account. It is shown that position PD feedback law advantage for ideal case no longer holds, and that more complicated feedback law depending on real effects has to be implemented with adapted transmission line. Drawback is slowdown of master slave interaction, suggesting to use more advanced predictive methods for the master and more intelligent control law for the slave.

• Journal of the Korean Institute of Rural Architecture
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• v.14 no.3
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• pp.77-84
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• 2012

The Conventional market located in Yangyang, Gangwon is currently facing the crisis, so it needs a new strategy to break a slowdown. Nevertheless, the local residents are looking forward to activating Yangyang conventional markets. To this end, the associates shall utilize their advantages of Yangyang conventional markets to supply cheap and good quality to guests with differentiated strategies. The purpose of the study is to analyze Yangyang conventional markets with architectural aspect and to provide conventional markets in each region with alternatives for revitalization.

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2006.06a
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• pp.111-112
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• 2006

The ship management industry in Korea is on the decrease since the latter half of 1980s. The ship management companies in Korea today has been confronted with a severe business crisis beacause of the pressure if rising coasts, marine environmental protection under the slowdown, to evade become a crew. This is a study on a revised bill of the related laws and regulations for revitalization of ship management companies.

• Journal of Korea Multimedia Society
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• v.13 no.1
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• pp.30-37
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• 2010

Many embedded real - lime systems have adopted processors supported with dynamic voltage scal-ing(DVS) recently. Power is one of the important metrics for Optimization in the design and operation of embedded real-time systems. We can save considerable energy by using slowdown of processor sup-ported with DVS. In this paper, we improved the previous algorithm at a point of view of time complexity to calculate task slowdown factors for an efficient energy consumption in embedded real-time systems with task synchronization. We grasped the properties of the previous algorithm having $O(n^{2})$ time complexity through mathematical analysis and s simulation. Using its properties we proposed the improved algorithms with O(nlogn) and O(n) time complexity which have the same performance as the previous algorithm has.

• Safety and Health at Work
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• v.9 no.3
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• pp.314-318
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• 2018

Background: Musculoskeletal disorders (MSDs) in the health industry are quite common, however, there have only been a few studies regarding physiotherapists, while in Greece, there is an apparent lack of research and data. The aim of this study is to investigate MSDs experienced by physiotherapists in Greece, their causes and specific measures, and good practices followed. Additional emerging risk factors will be examined. Methods: A questionnaire of MSDs followed by individual and workplace characteristics was completed by 252 physiotherapists. It covered the major workplace categories such as public hospitals, private rehabilitation centers, and private practices. Results: Analysis indicated that 89% of the respondents had experienced a work-related MSD; 32.2% of those injuries occurred within the first 5 years of working. The most lumbered physiotherapists were those working as private practitioners and almost half of the injured respondents chose to work while injured. The most common measure taken to tackle work related MSDs was found to be physical therapy sessions. Job satisfaction and psychosocial issues were also identified as side-effects of the economic slowdown. Conclusion: Physiotherapists in Greece were found to suffer from MSDs; workplace musculoskeletal injuries were quite common but under-reported. The body parts most affected were the lower back, the upper back, the shoulders, and the neck. There was a strong correlation between the workplace setting and the number of MSDs. A well-defined occupational safety and health management system and strict administration steering were found to reduce MSDs. The economic slowdown experienced in Greece during the execution of this study placed additional pressure on physiotherapists.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.562-564
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• 2005

최근 지역적으로 분산되어 있는 이질적인 고성능 컴퓨팅 자원을 하나로 묶어 거대한 시스템을 구성하는 그리드 컴퓨팅(Grid Computing)에 대한 연구가 활발하게 이루어짐에 따라, 본 논문에서는 그리드 시스템에서 클라이언트 작업들을 특성에 따라 분류하여 우선순위가 높은 작업은 예약이 가능한 큐로 분배하고 우선순위가 낮은 작업은 백필이 가능한 큐로 할당하는 다중 큐 스케줄링 기법을 제안하였고 다양한 실험을 통하여 제안된 기법들의 성능을 평가하였다. 그 결과 그리드 컴퓨팅 시스템의 이용률(Utilization)이 높아지고, 작업 지연시간(Slowdown)이 줄어드는 것을 확인하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.757-760
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• 2006

고성능 컴퓨팅 자원(Computing Resources)을 네트워크를 통하여 하나로 연동하여 단일 컴퓨팅 작업을 수행하는 그리드 컴퓨팅(Grid Computing)에 대한 연구가 최근 활성화 되고 있다. 이에 본 논문에서는 그리드를 구성하는 노드에 작업을 분배하는 메타 스케줄링(Metascheduling)과 노드내의 작업을 프로세서에 적절히 할당하는 작업 스케줄링 방법을, 작업 큐와 두 개의 백필 큐를 사용하는 혼합 기법을 사용하여, 작업 지연율(Slowdown Ratio)을 줄이고 그리드 컴퓨팅의 이용률(Utilization)을 높이는 방법을 제안하였으며 다양한 실험을 통하여 성능을 평가하였다.

• Proceedings of the Korea Contents Association Conference
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• 2003.11a
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• pp.109-112
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• 2003

A traffic flooding attack is an attack type that interfere with normal service by running out network bandwidth, process throughput, and system resource. It can be recognized intuitively by network slowdown, connect impossibility state and detected more exactly by collecting and analyzing packets that generate traffic flooding. In this paper, the packet analysis scheme is proposed for the more precise detection.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1998.10a
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• pp.15-18
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• 1998

Recently, domestic datawarehouse marketplaces take up the most important part of information technology investments with ERP(Enterprise Resource Planning), EC(Electronic Commerce) construction projects in spite of a business slowdown for IMF environment. Therefore, in industrial fields as finances, communications, manufactures, distributions, and so on, datawarehouse was constructed or is under construction, and datawarehouse success stories was showed around some enterprises that has constructed previously datawarehouse. This study is intended to be henceforth an index and direction for an actual proof study by discussing a study of methodology for datawarehouse construction in order to compare and analyze Top-down & Bottom-up approach for datawarehouse that has constructed in actual enterprises.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06d
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• pp.238-242
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• 2007

무선이동기기의 에너지 소모를 줄이기 위해서는 무선인터페이스의 전력소모를 최대한 줄이는 것이 중요하다. 대표적인 무선통신인 IEEE 802.11 표준에서는 무선인터페이스를 수면모드로 전환하는 전력절약모드(PSM, Power Save Mode)를 정의하고 있다 그러나 수면모드로 동작하는 도중에는 데이터를 수신할 수 없으므로 전력절약과 전송지연 사이에서 조정(trade-off)을 하여야 한다. HTTP와 같이 요청-응답을 기본으로 하는 통신 응용에서는 요청 발생 후 응답이 도착할 때까지 걸리는 시간을 노드의 수면시간에 반영하면 데이터의 수신이 지연되는 문제를 완화하면서 전력절약을 할 수 있으며, 기존 연구들도 이에 착안하는 기법을 제안하고 있다. 그러나 기존 연구들은 HTTP통신이 다중적으로 발생하면 그 효과는 사라지게 된다. 본 연구에서는 기존에 제안된 기법이 갖는 문제점을 분석하고 이를 완화하기위해 응답시간 지연비율을 적용한 지연수면(Delayed Sleep) 스케줄링 기법을 제안하며 시뮬레이션을 통해 이를 검증하였다.