• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2014년도 춘계 학술논문 발표대회
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• pp.70-71
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• 2014

The structural work is the main process of building construction which influence on the time, cost, safety and quality. The form work is one of the main process which has from 20 to 30 percentage of structural work. Especially the form work for beams is complex and need more manpower compared with form work for column or slab. When the existing forms such as plywood form, steel framed wooden form and aluminum form, is used for form work of beam, it would result in the cost overrun caused by needs of lots of manpower and resources. Therefore, the aim of this study is analysis of the requirement for development of SMART beam form. The result of this study shall be used for the development of SMART form work system.

• 패션비즈니스
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• 제10권2호
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• pp.166-180
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• 2006

The purpose of this study is to analyze the fashion images and the aesthetic characteristics of hand work imaged design. The 'hand work' has not only affected the contemporary life style but also the current fashion trend. The primary source of data has been a collection of recent books, news repots, and many articles from various kinds of mass media and fashion magazines since the year 2000. The results of this study can be summarized as follow. First, hand work imaged fashion design can be divided the background into three parts : post-materialism, aesthetics of slowness, personalize trend. Second, hand work imaged fashion design can be identified with the following images : folklore & craft image, second hand image, high touch image. Third, the aesthetic characteristics of hand work image reflects the concepts of sustainability and process communication.

• 한국사회정책
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• 제25권4호
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• pp.71-104
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• 2018

본 연구에서는 한국복지패널 4-11차년도(2008-15) 자료를 활용하여 우리나라 근로빈곤의 구조와 동학을 가구-노동시장-복지국가의 분배과정 모형을 적용하여 분석하였다. 그간 근로빈곤 연구가 근로 및 빈곤 개념의 규정과 측정 문제를 주로 다루고 노동시장에서의 취업 및 실업 지위의 지속과 반복을 통해 빈곤 동학을 규명해 왔으나, 상대적으로 제도의 분배 효과를 분석하는 연구는 드물었다. 본 논문에서는 노동시장에서의 임금 소득 확보, 가구 단위에서의 복지 욕구 충족과 가구원 간의 소득공유, 복지국가 단계에서의 사회보장기여금과 소득세 납부 및 공적 이전소득이 근로빈곤에 미치는 영향을 체계적으로 분석하였다. 분석 결과, 근로빈곤은 전반적으로 2008-11년까지 각 단계에서 증가하는 추세에 있으며 그 이후 전반적으로 감소하는 경향을 보여주고 있다. 노동시장 단계에서는 전일제 노동 여부가 근로빈곤에 가장 큰 영향을 주었으며, 종사상 지위와 고용형태에 따른 근로빈곤률의 차이도 두드러졌다. 가구 단계에서는 가구 노동 강도와 소득자수가 빈곤률과 빈곤탈출에 큰 영향을 주었는데 그 관계가 반드시 선형적이지는 않았다. 복지국가는 근로빈곤 탈출에 미치는 영향이 전반적으로 작았다. 제도의 분배과정 관점에서 근로빈곤 집단은 주로 가구-복지국가 단계, 혹은 노동시장-가구-복지국가 단계 내내 근로빈곤 위험에 처하고 있었다. 모든 단계에서 근로빈곤 위험에 노출이 된 적이 없는 비위험 집단은 약 80%를 차지하고 있었으나 그 규모에는 큰 변동이 없었다.

• 산업경영시스템학회지
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• 제5권7호
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• pp.1-7
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• 1982

This thesis deals with the method of Work Sampling to compare production activity due to change of productivity, workmen's productivity environment, nonproductivity of machine and plant when there is a process before and after change of work environments. So, this study takes $x^2$ - test to discover significant change of process, and obtains Proper observation number due to ratio difference-test over change of productivity before and after process change. Therefore, this thesis represent statistically effective results between two periods before and after process change.

• 산업경영시스템학회지
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• 제26권3호
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• pp.31-38
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• 2003

There is boner process of stone manufacturing to become quality down of stone to consolidated micro crack appearance of stone surface and biotite by fire that is to be route process in stone surface by flame of LPG. And then, it is develop that stone surface process equipment by automation for the work method of boner process can be substitute work method by water jet To development of equipment, There is to be down noise and dust. According to remove calamity growth hazardous substance in the work environment, there is to solve workplace avoidance factor.

• 한국건설관리학회논문집
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• 제4권1호
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• pp.90-96
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• 2003

도심지 건축공사가 증가하고 있는 우리나라에서 작업공간의 부족 및 자재의 적시공급에 대한 문제는 반드시 해결해야 할 과제이다. 이 중에서도 주택건설에 있어 가장 큰 비중을 차지하고 있는 아파트 시공의 경우, 초고층화로 골조공사의 중요성과 함께 친환경적 공법과 합리적 공정개선 및 원가절감을 구현할 새로운 공법이 요구되고 있다. 본 연구에서는 국내 건설현장의 사례조사를 통해 슬래브 거푸집공사와 마감공사의 프로세스에서 불필요한 요소를 최소화하고자 공업화 자재를 활용한 (골조-마감공사)통합공법을 제시한다 가치흐름분석기법(Value Stream Mapping)을 활용하여 기존 프로세스에서의 비 가치 창출작업을 가치창출작업에 통합시키거나 제거하여 슬래브 공사 내에서 공기 및 투입인력의 절감 가능성을 확인하고, 공기단축과 원가절감 효과를 측정하였다. 이와 같이 공업화 자재의 활용으로 현장작업에 따른 변이를 최소화하여 공정의 안정성 및 공정계획의 신뢰성을 확보 등 공정의 합리화를 구현하고자 한다.

• 수산해양기술연구
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• 제43권3호
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• pp.212-221
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• 2007

This paper describes on the evaluation and management of work process in suction hopper dredger and grab bucket dredger as an application of a PC-based ECDIS system. The dynamic tracking of dredging bucket and the data logging of grab dredging information were performed by using the grab dredging vessel "Kunwoong G-18". The position and route tracking of the dredger moving toward the ocean dumping site of dredged material was performed by using the hopper dredging vessel "Samyang-7". The evaluation of wok process in the dredging field, for grab dredger, was continuously carried out on January to May, 2006, in Incheon Hang and for hopper dredger, on July to December, 2003, in Busan Hang, Korea. The dredging information, such as dredger's position, heading, dredging depth and route track which was individually time stamped during the dredging operation, was automatically processed in real-time on the ECDIS and displayed simultaneously on the S-57 ENC chart. From these results, we conclude that the ECDIS system can be applied as a tool in order to manage the work process during the dredging operation, and also in order to generate the factual record of the dredging activities that is sufficient for dredging inspector to accurately evaluate the contract performance even in the absence of a full-time onboard inspector.

• 한국산업보건학회지
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• 제28권1호
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• pp.100-107
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• 2018

Objectives: This study examines exposure to hazardous substances in the working environment caused by exposure to toxic substances produced in the aluminum die casting process in the automobile manufacturing industry. Materials and Methods: The exposure concentration levels, detection rates and time-trend of 15 hazardous factors in the aluminum die casting process over 10 years(from 2006 to 2016) were used as a database. Results: The study found that hazardous factors in the aluminum die casting process were mostly metals. The rate for detected samples was 70.6%(405 samples), and that for not detected samples was 29.4%. The noise for an eight-hour work shift showed a 49.7% exceedance rate for TLV-TWA. Average noise exposure was 89.0 dB. The maximum exposure level was 105.1 dB. Conclusion: The high numbers of no-detection rates for hazardous substance exposure shows that there is no need to do a work environment measurement. Therefore, alternatives are necessary for improving the efficiency and reliability of the work environment measurement. Moreover, to prevent noise damage, reducing noise sources from automation, shielding, or sound absorbents are necessary.

• Design & Manufacturing
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• 제16권1호
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• pp.21-26
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• 2022

In the CNC machining process, problems such as lowering of machine operation rate, setting errors, and machining precision occur due to the increase in setting time and preparation time. These machining errors cause delays in delivery and increase in cost due to an increase in the number of mounting and dismounting of the workpiece, an increase in measurement and reprocessing time, and an increase in the finishing time in the assembly process. Therefore, in this study, by automating the setting of the work piece using OMV (On Machine Verification), which is a meteorological measurement system, the preparation time for machining the work piece and the setting accuracy were improved, the rework rate was reduced, and the mold manufacturing process was shortened. Through the advancement, standardzation, and automation of the mold part manufacturing process, we have improved productivity by minimizing low-value-added repetitive tasks. In addition, the measurement time was reduced by more than 50% and the machining measurement rate was improved by more than 20%, eliminating repetitive work for correcting machining defects, and reducing the work preparation time by more than 15% through automatic setting.

• 한국산업보건학회지
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• 제24권3호
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• pp.272-280
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• 2014

Objectives: The purpose of this study was to evaluate the characteristics of worker exposure to hazardous chemical substances and propose the direction of work environment management for protecting worker's health in the semiconductor assembly process. Methods: Four assembly lines at two semiconductor manufacturing companies were selected for this study. We investigated the types of chemicals that were used and generated during the assembly process, and evaluated the workers' exposure levels to hazardous chemicals such as benzene and formaldehyde and the current work environment management in the semiconductor assembly process. Results: Most of the chemicals used at the assembly process are complex mixtures with high molecular weight such as adhesives and epoxy molding compounds(EMCs). These complex mixtures are stable when they are used at room temperature. However workers can be exposed to volatile organic compounds(VOCs) such as benzene and formaldehyde when they are used at high temperature over $100^{\circ}C$. The concentration levels of benzene and formaldehyde in chip molding process were higher than other processes. The reason was that by-products were generated during the mold process due to thermal decomposition of EMC and machine cleaner at the process temperature($180^{\circ}C$). Conclusions: Most of the employees working at semiconductor assembly process are exposed directly or indirectly to various chemicals. Although the concentration levels are very lower than occupational exposure limits, workers can be exposed to carcinogens such as benzene and formaldehyde. Therefore, workers employed in the semiconductor assembly process should be informed of these exposure characteristics.