• 한국방사선학회논문지
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• 제17권2호
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• pp.267-275
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• 2023

전 세계적으로 방사선종사자들의 피폭 기록은 관심의 대상이며 피폭이 일어나는 분야에 대한 분석이 수행되고 있다. 한국에서는 유관부처에 따라 보건복지부, 농림축산식품부, 원자력안전위원회에서 종사자들의 피폭을 11개 업종으로 나누어 기록을 수집 분석하고 있다. 그러나 이러한 분류 체계는 유엔방사선영향과학위원회를 비롯한 주요 국가들의 분류 체계와는 정합성이 부족하다. 국내의 종사자 피폭 분류 체계는 명확한 분류 기준이 없고 업종 특성 등을 반영해주지 못하고 있다. 유엔방사선영향과학위원회의 분류 체계를 바탕으로 국내의 분류 체계를 핵주기 분야, 의료분야, 산업분야, 그 외 분야(교육/연구, 군사/공공)의 5개 대분류 체계와 그에 따른 세 분류 및 직군 분류를 본 연구를 통해 제안하였다.

• Structural Engineering and Mechanics
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• 제71권5호
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• pp.553-562
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• 2019

This paper presents the results of a study into the dynamic behaviour of a support structure of a mobile elevating work platform. The vibrations of the mechanical system of the observed structure are examined analytically, numerically, and experimentally. Within the analytical examination, a simple mathematical model is developed to describe free and forced vibrations. The dynamic analysis of the mechanical system is conducted using a discrete dynamic model with a reduced number of vibrational degrees of freedom. On the basis of the expression for the system energy, and by applying Lagrange's equations of the second kind, differential equations are derived for system vibrations, frequencies are determined, and the laws of forced platform vibration are established. At the same time, a nonlinear FEM model is developed and the laws of free and forced vibration are determined. The experimental and numerical part of the study deal with the examination of the real structure in extreme conditions, taking into account: the lowest eigenfrequency, forced actions that could endanger the general stability, the maximal amplitudes, and the acceleration of the work platform. The obtained analytical and numerical results are compared with the experiments. The experimental verification points to the adverse behaviour of the platform in excitation cases - swaying. In such a situation, even a relatively small physical force can lead to unacceptably high amplitudes of displacement and acceleration - exceeding the usual work values.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2015년도 춘계 학술논문 발표대회
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• pp.119-120
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• 2015

Appropriate management of the finish works in construction project is one of most important activities that must be conducted considering the total duration of the project. Masonry work is a fundamental process that is performed in the preliminary steps of finish works. However, it has been investigated that the analysis of delay factors affecting masonry work has been neglected in the domestic construction site. Therefore, this study deducts delay factors affecting masonry work by literature review and survey on site engineers and labors. This study has been conducted as a preliminary step of developing a construction project interference management system which is expected to suggest objective information for the decision making in construction sites.

• 산업경영시스템학회지
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• 제2권2호
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• pp.39-51
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• 1979

In introducing and applying the budget management system, the question of how to establish management structure(skelton) representing budget management responsible unit is significantly related to the degree of accuracy and analysis on the performance measurement of standard work unit. We have the following rational process of establishing performance measurement of budget management System ; 1) Standardization of work method 2) Establishment of management structure 3) Institution of budget management system. Especially, this system is based on a premise of efficiency of objectives management, it is assumed that performance measurement in the standard work unit must be enforced according to the basis and categories of performance evaluation based on the evaluating work unit. Therefore, most of all, the following three detail questions(subjects) are to be determined in order to rationalize these above principles to a maximum possible extent of performance measurement system. First, we established respective performance standard unit with respect to such detailed work unit, performance standard unit of which were accurately applicable directly from using the budget ana objectives account data and their supplementary data of the work measurement techniques. Second, by using the above mentioned question, over all evaluation and suggestion are made based on the study of the recording for each work unit development, budget management and production nit (volume of production) Third, the measurement of performance of budget management system is based on the principle of standard work unit, compared with the standard basis and actual work unit by period and activities unit and calculated percentage effectiveness according to the above procedure. and so evaluated the efficiency of performance measurement on the budget management system.

• Journal of applied mathematics & informatics
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• 제28권1_2호
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• pp.531-537
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• 2010

In this paper, some vacation policies are considered, which can be related to the past behavior of the system. The server, after serving all customers, stays idle or to wait for some time before a vacation is taken. General formulas for the waiting time and the amount of work in the system are derived for a vacation policy. Using the analysis on the vacation system, we derived the waiting time in the sequential bottleneck station.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 추계학술대회논문초록집
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• pp.311.2-311
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• 2002

Even through the problem of misalignment is of great importance, not much work has been reported in the literature on the effect of misalignment on the vibrations of the gear-bearing systems. Therefore, the nonlinear dynamic characteristics of the gear driving system due to misalignment are investigated in this work. Transmission error for helical gear and bearing nonlinear stiffness is calculated. (omitted)

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.716-717
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• 2015

A construction temporary work is main process and importance trade section. A technology system of construction temporary has very low availability of field works and needs improvements in Korea as construction site has a quick response about new requirements. This study reviews literature researches and can verify that changes to a comprehensive technology system for construction site. In addition, it suggests a breakdown structure of new standards for temporary construction technology based on views of construction site managers. Meanwhile, temporary construction technology in Korea has changed with a specification of construction temporary work which had been revised in 2014. However, the revision is merely dividing the design and building off of construction temporary technology. It is lacking in many ways to change this in a new standard system for temporary construction technology. Henceforth, it needs to develop a standard system for temporary construction technology and a professional system that is appropriate for different purposes by detail trade sections.

• 한국기록관리학회지
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• 제6권2호
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• pp.57-85
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• 2006

업무과정을 철저하게 기록화하기 위해서는 업무관리와 기록관리가 통합적으로 이루어져야 한다. 이를 위해 업무분류표와 기록분류표를 통합한 기록분류체계 수립이 적합하지만, 지금까지 기록분류체계 수립을 위해 이용된 절차 및 방법론들은 일반조직, 단체 등에서 지침으로 활용하거나 분석을 수행하기에는 구체성이 부족하다. 본 연구에서는 이러한 인식을 바탕으로 업무관리와 기록 관리를 유기적으로 연계시킬 수 있는 기록분류체계 개발을 위해 다음과 같이 방법을 구체화 하였다. 우선 기록분류체계 개발을 위한 분류의 원칙으로 기능분류를 선택하였다. 그 다음으로 기록분류체계 개발을 위해 구체적인 방법을 제시하였다. 이를 위해 호주의 기록관리 업무분석 표준인 DIRKS(Designing and Implementing Recordkeeping Systems)와 AS 5090을 분석, 비교 하였고, 이를 토대로 정보공학과 경영학에서 업무분석시 사용되는 방법론과 보완할 부분을 연구하여 구체적인 기록분류체계 개발 방법을 제시했다. 이와 같이 구체화한 기록분류체계 설계를 위한 개발 모형을 친일반민족행위진상규명위원회에 적용하여 검증하였다는데 본 연구의 그 의의가 있다.

• 산업기술연구
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• 제31권A호
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• pp.11-19
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• 2011

A new PCD (Pitch Circle Diameter) adjustment system has been designed in this study. Traditional system requires repetitive same works in changing automobile tires. The system proposed in this study requires just one simultaneous work to finish the job. We designed the system using Solidworks CAD software. We further investigate the jobs for both cases through work factor method. Based on careful clarification of the job, work factor units were assigned to each work factor. Even if further analysis should be processed for actual field application, the mechanism proposed in this study may provide good reference for practical usage.

• 한국안전학회지
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• 제27권2호
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• pp.72-77
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• 2012

There are insufficient models that find problems and solutions for accident prevention through risk assessment and suggest safe work process and work instruction from foundation works to finish work for accident decrease. This paper presents a quantitative risk assessment model by analysis of risk factors in each process such as earth works, drainage works, pavement works, appurtenant works and etc based on accident examples and investigation on actual condition in roads construction work. In addition, the safety management system was developed to perform risk assessment of construction and use it for effective safety training for labor.