• 수도
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• 통권32호
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• pp.42-68
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• 1984

• 수도
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• 통권19호
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• pp.49-56
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• 1979

• 수도
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• 통권31호
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• pp.68-80
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• 1984

• 한국안전학회지
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• 제27권3호
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• pp.131-140
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• 2012

Though there might exist not a few differences between cyclic works and atypical works, many researchers have applied the same assessment techniques that used for repetitive works, which may result introduce bias in their conclusions. This research aimed to verify whether there exist non-negligible work characteristics and/or dissimilarity among works with different work nature and whether one of the most prevalent assessment techniques for assessing ergonomic hazards of musculoskeletal disorders, REBA, can be applied to atypical works. For a general hospital, an automobile repair shop, and two auto-part assembly plants which manufactures quite different parts, a questionnaire survey and field investigation and ergonomic assessment were carried out and analyzed statistically with reference to the 3rd Quantification technique. The results showed that there exist remarkable difference between physical factors in cyclic works and atypical non-cyclic works. As for repetitive work, body posture was significant factors affecting on musculoskeletal disorders while atypical works seemed to have none which implied that the necessity of taking psychosocial factors into account for assessment of hazards. Complain rate in repetitive works was highest shoulder, back, and neck or wrist in sequence. However, there existed no consistent trend in complain rate in atypical works. And, though weight of manufacturing objects was a common factor that can partly explain musculoskeletal complain, time duration was significant in atypical work whereas repeatability and body posture were significant in repetitive works. As being the results, to summarize, it could be said that application of conventional ergonomic assessment techniques regardless of repetitiveness would be fruitless, and that the necessity of a unique methodology focused on atypical non-cyclic works should not be neglected.

• 대한건축학회논문집:구조계
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• 제34권5호
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• pp.35-42
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• 2018

In order to seek out methods to reduce safety accidents caused by construction machinery and equipment, this study collects data about safety accidents and draws main risk factors by construction from the data, through SNA. It aimed to suggest safety management points to be used in future construction fields, by analyzing risk index of such factors. The finding can be summarized: First, Backhoe Bucket is the risk factor for crash accidents of average workers in earth works; boring machines-maintenance is the risk factor for fall accidents of construction machinery operators in foundation works; bending machine-reinforcing rod processing is the risk factor for jamming accidents of reinforcing rod engineers in frame works; and mobile crane-hook is the risk factor for crash accidents of average workers in lifting works. Second, works can be arranged in turn, according to the risk index: earth, lifting, frame and foundation works. Risk factors can be also arranged according to the risk index: Backhoe in earth works, pile drivers in foundation works, bending machines in frame works and mobile cranes in lifting works. This study has some limits, in that it only analyzed main machinery/equipment, among various kinds of them, for earth, foundation, frame and temporary works (lifting works) and used data collected over three years. Therefore, it is necessary to conduct an analysis using big data, by collecting additional data about a lot of machinery/equipment in future construction fields.

• 한국가구학회지
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• 제26권3호
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• pp.229-240
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• 2015

Most of crime occurrence in Korea is caused by ex-convict. Various correctional training programs support convicts to reform a criminal as a treatment program. This study is about the most crucial 'Correctional Industry Works Exhibition' that is hosted by the Ministry of Justice and supervised by Seoul Correctional Service and other related events. 'Correctional Industry Works Exhibition' divides into the convicts' works in prison, literary works and staffs' literary works. Based on the working experience as a judge for the last six years(2009~2014) and analysis of research cases, the writer grasps the problems that needs to be improved and suggests the strategies. In the future, 'Correctional Industry Works Exhibition' will be a festival for convicts and prison officers that communicates with the public and will vitalize the works in prison that will produce good products. Moreover, it can be expected to support the social reintegration of prisoners and repeated crime after released from prison.

• 한국안전학회지
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• 제21권4호
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• pp.25-32
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• 2006

LonWorks over IP(LonWorks-IP) virtual device network(VDN) is an integrated form of LonWorks device network and IP data network. In especially real-time distributed servo applications on the factory floor, timely response is essential for predictive and preventive maintenance. The time delay in servo control on LonWorks-IP based VDN has highly stochastic nature. LonWorks-IP based VDN induced transmission delay deteriorates the performance and stability of the real-time distributed control system and can't give an effective preventive and predictive maintenance. In order to guarantee the stability and performance of the system, and give an effective preventive and predictive maintenance, LonWorks-IP based VDN induced time-varying uncertain time delay needs to be predicted and compensated. In this paper new Pill control scheme based on Smith predictor, disturbance observer and band pass filter is proposed and tested through computer simulation about position control of DC servo motor. It is shown that how can the proposed control scheme be designed to minimize the effects of uncertain varying time delay and model uncertainties. The validity of the proposed control scheme is compared and demonstrated with the comparison of internal model controllers(IMC) based on Smith predictor with and without disturbance observer.

• 한국시조학회지:시조학논총
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• 제25집
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• pp.5-27
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• 2006

고시조와 60년대 이전의 시조, 중국동포 시조. 2,000년대 발표된 현대시조를 문장구조의 측면에서 시적 의미를 어떻게 나타내고 있는가를 살펴보았다. 첫째, 고시조나 60년대 이전의 시조 나아가 중국동포 시조에서는 가급적 수식어를 배제한 간결한 문장으로서 의미 해석이 쉽게 되어 있었다. 그러나 2,000년대 발표된 현대시조(이하 현대시조) 중에는 수식어가 복잡하게 읽혀 있는가 하면 수식어가 남용되는 경우가 있었다 둘째. 고시조나 60년대 이전의 시조, 나아가 중국동포 시조에서는 의미파악이 수월하고 주술관계가 분명하게 나타나 있다. 그러나 현대시조 중에는 주술관계가 불분명할뿐더러 암시성이 보이지 않는 비유어의 남용으로 인하여 의미해석이 어렵게 나타난 경우가 있었다. 셋째, 고시조나 60년대 이전의 시조, 중국동포 시조에서는 각 장의 의미가 독립되어 이것이 유기적으로 결합하여 시조작품을 이루었는데, 현대시조에서는 초, 중장이 종장의 수식어로 전락하여 장으로서의 독립성을 확보하지 못하는 경우가 있었다. 넷째, 시조 형식과 거리가 있는 작품을 시조답게 장 구분을 하여 시조라고 우기는 경우가 있었다. 정형시는 그것이 문자로 표기되어 있다고 해도 음성에 의해 정형으로 확인되어야 하는 시다. 시조가 정형시인 바에는 정형시답게 읽혀져야 하고 이것을 들어서 이해가 수월해야 하는 것이다. 그렇다면 난해한 표현은 애초부터 시조와는 거리가 먼 것이다. 현대시조가 너무 안이한 표현, 주제의식의 단순성을 극복해야 한다면 의미해석을 방해하는 문장구조로서가 아니라 간결한 문장으로 참신한 비유, 선명한 이미지. 신선한 주제 등을 통해서 창작되어야 할 것으로 생각된다.

• 전자공학회논문지SC
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• 제44권1호
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• pp.33-39
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• 2007

LonWorks/IP VDN은 LonWorks 디바이스 네트워크와 IP(데이터) 네트워크와의 통합네트워크로 산업현장에 대한 유비쿼터스 접근을 제공하여 설비에 대한 예지 및 예방보전을 가능하게 한다. 산업현장에 대한 예지 및 예방보전을 위한 실시간 분산제어 환경에서 즉각적인 응답은 필수불가결한 요소이다. LonWorks/IP 가상 디바이스 네트워크(VDN) 상에서 불확실한 시간지연은 산업현장에 대한 실시간 예지 및 예방보전을 위해 분산 제어를 수행할 때 시스템의 안정성과 성능을 악화시킨다. 따라서 네트워킹 된 분산제어시스템의 안정성을 보장하고 성능을 개선하기 위해서는 시간에 따라 가변적인 불확실한 시간지연을 보상할 필요가 있다. 본 논문에서는 LonWorks/IP VDN와 같은 분산제어 환경 하에서 서보 제어를 수행하는 경우에 외란관측기와 위상지연 보상기로 ZPETC(Zero Phase Error Tracking Controller)를 도입한 제어구조가 제시되고 컴퓨터 모의실험이 수행된다. 제안된 제어기의 성능은 컴퓨터 모의실험을 통하여 외란관측기를 도입한 Smith 예측기 기반의 내부모델제어기(IMC)의 제어결과와 비교 제시된다. 제안된 제어기는 외란과 잡음에 강인한 특성을 가지며, 주기적인 신호에 대한 추종성능을 상당히 개선시키므로 가변적인 시간지연을 갖는 LonWorks/IP VDN 상에서 주기적인 작업 수행에 필요한 분산 서보제어에 매우 적합하다.

• 한국의류산업학회지
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• 제22권3호
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• pp.296-309
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• 2020

Carol Christian Poell is a designer famous for experimental designs and presentations. Poell's actions in the fashion-world resemble Fluxus, an anti-art group that started working in the 1950s. This study analyzed the works of Poell based on the characteristics of Fluxus and then compared the works of Poell with the performance of Nam June Paik, a Fluxus artist. We conducted literature studies and case studies. We examined the works of Poell and Paik based on the four characteristics of Fluxus: iconoclasm, unity of art and life, playfulness and chance. The results were as follows. First, they were engaged in anti-aesthetic works. While Paik concentrated on the content aspect of works, Poell was more focused on formal aspects. Second, neither of them distinguished between art and life. Paik achieved it by including audiences in his works; however, Poell attained it by adopting daily spaces as a place to display presentations and use ready-made forms. Third, they showed playfulness with a satirical nuance. Paik expressed it in an erotic way; however, Poell implied it through the irrational settings of circumstance. Finally, they created works by utilizing chance. Paik focused on auditory elements and the content aspects of works; however, Poell used the coincidence of visual and tactile elements when creating his works. This study compared the works of Poell with Paik and has its significance in its usefulness to understand designers with Fluxus characteristics in the fashion industry.