• The Optical Journal
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• v.13 no.2 s.72
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• pp.23-27
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• 2001

이번 호는 작업관리르 다룬다. 작업 관리는 작업 룰(규율) 관리, 준비 교체 작업 관리, 작업 개선관리의 세 시스템으로 대별할 수 있다. 이와 함께 소정의 표준작업조건 아래서 일정한 작업방법에 따라서 숙련된 작업자가 정상적인 속도로 작업을 수행하는 데 필요한 시간인 '표준 작업시간'을 이해하고, 표준 작업시간 측정방법 가운데 Stop Watch법을 자세히 알아보기로 하자.

• Proceedings of the Korean Society of Computer Information Conference
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• 2011.06a
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• pp.67-70
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• 2011

본 논문에서는 고성능 컴퓨팅 시스템의 성능 향상을 위한 효율적인 동적 작업부하 균등화 정책을 제안한다. 이 정책은 시스템 자원인 CPU와 메모리를 효율적으로 사용하여 고성능 컴퓨팅 시스템의 처리량을 최대화하고, 각 작업의 수행시간을 최소화한다. 또한 이 정책은 수행중인 작업의 메모리 요구량과 각 노드의 부하 상태를 파악하여 작업을 동적으로 할당한다. 이때 작업을 할당 받은 노드가 과부하 상태가 되면 다른 노드로 작업을 이주시켜 각 노드의 작업부하를 균등하게 유지함으로써 작업의 대기시간을 줄이고, 각 작업의 수행시간을 단축한다. 본 논문에서는 시뮬레이션을 통하여 제안하는 동적 작업부하 균등화 정책이 기존의 메모리 기반의 작업부하 균등화 정책에 비해 고성능 컴퓨팅 시스템의 성능 향상 면에서 우수함을 보인다.

• Journal of Korean Ophthalmic Optics Society
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• v.19 no.4
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• pp.457-469
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• 2014

Purpose: This study was to evaluate students and optometrist in the importance and difficulty of work capability, and the educational needs for optometric duty in order to use them as basic data for the improvement of the curriculum. Methods: 292 ophthalmic optic's college students and 123 optometrists were surveyed in the importance and difficulty of work capability, and the educational needs for the optometric duty, and data was statistically analyzed for the results. Results: The mean of the importance of work capability was higher for the optometrists (3.61) than for the students (3.51) and glasses dispensing was the highest for both students and optometrists. The mean of the difficulty of work capability was higher for the students (2.75) than for the optometrists (2.67), which was the highest in refraction for the students and in prescription for the optometrists. The mean of educational needs was higher for the optometrists (3.53) than for the students (3.45), which was the highest in glasses dispensing for the students and highest in refraction for the optometrists. There were significant differences in some tasks in between the students by gender, grade and desired working place, while between the optometrists by gender, age, work experience, working place and working area (p<0.05). Conclusions: It is necessary to improve a curriculum of the Department of Opthalmic Optics, and develop a standard curriculum reflected the importance and the difficulty of work capability, and the educational needs regarding to optometric duty.

• The Journal of Korean Academy of Sensory Integration
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• v.6 no.1
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• pp.47-62
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• 2008

Introduction : Sensory Integration(SI) theory, science it is developed by an occupational therapist A. Jean Ayres, is the one of the most popular frames of reference used in occupational therapy(OT) intervention. It has been proved as a scientific theory especially in neuroscience discipline through abundant research and practice. Occupational therapists apply the SI therapy with strong clinical reasoning to improve adaptive behaviors of their clients and try to link the adaptive behaviors with occupational performance in the clients' everyday life. One of the manners regarding clinical reasoning is Top-down approach. In occupational therapy discipline, Top-down approach is well-reflected within two evaluation tools; Canadian Occupational Performance Measure(COPM) and Assessment of Motor and Process Skills(AMPS) and two models of practice; Canadian Model of Occupational Performance(CMOP) and Occupational therapy intervention process model(OTIPM). Objective : The purpose of this paper demonstrates how SI therapy can be employed within OTIPM and how the OT process (evaluation-intervention-outcome) can be structuralized based on the Top-down approach. This single-case study recognizes the impact of a SI therapy for a male adolescent on his occupational performance. Intervention Examined : "P" was 16 years old male adolescent with no diagnosis and junior of the high school when he was referred. P was always with mouth opened, showed difficulties in gathering things need to be prepared and managing and paying money for shopping, and his colleges dislike getting close to him because he can't was his body well. AMPS was administrated in initial evaluation and reevaluation of P's occupation performance, Bruininks-Oserestky Test of Motor Proficiency-2(BOT-2) was carried out to assess motor functions and perception skills related in sensory integration, and occupational therapist performed clinical observation in order to complement the evaluation quantitatively and quantitatively. Based on the evaluation, it is concluded that the SI therapy is primary means to improve P's occupational performance, and three therapeutic approaches were constructed; restorative, acquired and compensatory approach. P showed improved motor and process skills in occupational performance after undergone the occupational therapy. Conclusions : The sensory integration therapy was practical enough to build the bridge between the occupational performance(Top) and the underlying component problems (Bottom). The OTIPM was helpful to identify meaningful occupation for P and P's family within P's contexts, and the AMPS was valuable to analyze and clarify the cause of difficulties in the chosen occupational performance.

• Proceedings of the KIEE Conference
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• 1999.11c
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• pp.687-689
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• 1999

본 논문에서는 이산 제어 시스템의 작업 수행 시, 특정작업에 있어서의 불규칙한 시간 지연 때문에 시스템이 불안정해지는 것을 막기 위해 시간 지연을 갖는 시스템의 안정도를 분석한다. Soft real time OS인 Windows NT 운영체제를 갖는 PC-based 이산 제어 시스템에서는 하드웨어적으로 인터럽트를 사용하여 시간 제한성이 있는 작업을 수행한다. 그러나 인터럽트와 함께 수반되는 DPC(Deferred Procedure Call)의 불규칙한 수행 시간 때문에 다른 작업이 수행되어야 할 표본시간이 길어지게 된다. 이러한 현상으로 다른 작업의 시간 지연이 발생하게 되며, 시간 지연은 시스템을 불안정하게 하는 요인이 된다. 안정성 분석 면에서 보면, 시간 지연을 고려하지 않은 시스템의 극점은 안정한 위치에 존재하게 되는데 반해, 시간 지연을 고려한 시스템의 극점은 불안정한 위치에 존재하게 된다. 따라서 본 논문에서는 시간 지연이 존재하는 제어 시스템의 안정성을 보장하기 위해서 시스템의 안정성을 분석한다.

• ICROS
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• v.17 no.2
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• pp.19-26
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• 2011

무인화 로봇 연구는 정해진 환경에서 빠른 속도로 반복적인 작업을 수행하기 위한 산업용 로봇을 이용하는 무인화 공장 등으로 발전되었다. 최근에는 정해진 환경에서 작업을 수행하는 것이 아닌 사람이 생활하는 공간에서 사람 대신 작업을 수행하는 무인화 로봇 시스템 연구가 증가하고 있다. 청소 로봇은 이미 많은 가정에 보급되었으며, 홈 로봇이나 안내 로봇에 대한 연구도 진행되고 있다. 또한 전쟁 지역이나 심해, 방사는 누출 지역 등 재난 지역에 사람 대신 투입되어 인명 구조나 탐사, 시설 복구 등의 역할을 수행하기도 한다.

• Journal of the Korea Convergence Society
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• v.12 no.5
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• pp.337-344
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• 2021

To determine the impact of long-term social distancing and isolation from COVID-19 on the area of adult occupational performance, targeting adults in their 20s to 60s distributed nationwide for 2 months from November 2020 to December 2020. A questionnaire based on the occupational therapy execution system was constructed and investigated. A total of 270 people responded to the questionnaire, and the survey method was an online questionnaire. As a result of the analysis, there were significant differences in both occupational performance and satisfaction before and after COVID-19 in 33 (75%) of 45 items in 9 areas of the occupational performance area. There were significant changes in performance and satisfaction by age group in all age groups in health management, social participation, leisure, and work. In particular, those in their twenties showed the greatest change in performance and satisfaction in the leisure domain, while those in their 30s and 60s showed the greatest change in both the performance and satisfaction in the leisure domain. Along with these changes, the survey subjects recognized that their occupational performance and satisfaction were lower than before COVID-19 was a problem and confirmed that they are willing to improve. As COVID-19 is still a pandemic, it is necessary to involve experts in each area and follow-up studies to improve the differences by occupational performance area and age, which have changed due to long-term social distancing and isolation.

• Journal of the Korean Institute of Intelligent Systems
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• v.14 no.2
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• pp.164-170
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• 2004

This paper proposes a Distributed Autonomous Robotic System(AIS) based on Artificial Immune System(AIS) and Distributed Genetic Algorithm(DGA). The behaviors of robots in the system are divided into global behaviors and local behaviors. The global behaviors are actions to search tasks in environment. These actions are composed of two types: dispersion and aggregation. AIS decides one among above two actions, which robot should select and act on in the global. The local behaviors are actions to execute searched tasks. The robots learn the cooperative actions in these behaviors by the DGA in the local. The proposed system is more adaptive than the existing system at the viewpoint that the robots learn and adapt the changing of tasks.

• Journal of the Korean Institute of Intelligent Systems
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• v.14 no.6
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• pp.699-704
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• 2004

This paper proposes a Distributed Autonomous Robotic System(DARS) based on an Artificial Immune System(AIS) and a Classifier System(CS). The behaviors of robots in the system are divided into global behaviors and local behaviors. The global behaviors are actions to search tasks in environment. These actions are composed of two types: aggregation and dispersion. AIS decides one among these two actions, which robot should select and act on in the global. The local behaviors are actions to execute searched tasks. The robots learn the cooperative actions in these behaviors by the CS in the local. The proposed system is more adaptive than the existing system at the viewpoint that the robots learn and adapt the changing of tasks.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.1239-1241
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• 2015

ETL(Extraction, Transformation, Loading)작업은 데이터웨어하우스 시스템 구축 및 유지관리 뿐만 아니라 차세대 정보시스템 구축의 핵심 프로세스에 해당한다. 특히 차세대 정보시스템 구축에 있어서 ETL 작업의 성능은 시스템오픈의 성패를 좌우하는 중요한 요소이다. 일반적으로 차세대시스템 구축의 데이터 전환을 위해 수행되는 ETL작업은 대용량데이터에 대한 다양한 형태의 데이터변형 과정을 수반하며 반드시 정해진 시간안에 완료되어야 한다. 또한, 수 많은 원천 집합을 추출하여 타겟시스템의 형태에 맞게 변형 및 적재하는 작업은 한정된 컴퓨팅 자원내에서 수행되어야 한다. 따라서 자원성능을 고려한 ETL작업 스케줄 최적화는 데이터전환 작업에 있어 필수적인 고려사항이 된다. 이 연구에서는 가용한 물리자원을 최대한 활용하여 ETL 프로세스의 처리능(throughput)을 최대화 하는데 초점을 맞추어, ETL프로세스를 페트리넷을 이용해 모델링하는 기법을 제시한다. 이 모델에는 ETL 프로세스가 수행될 서버의 컴퓨팅자원이 토큰화(tokenize)되어 포함된다. 이 모델을 기반으로 가용자원을 최대한 활용하면서도 자원병목이 발생하지 않는 수준으로 ETL 작업이 수행될 수 있도록 프로세스를 제어할 수 있는 방안을 제시한다.