• 건설관리
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• 제12권2호
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• pp.55-58
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• 2011

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2008년도 춘계 학술논문 발표대회
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• pp.1-5
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• 2008

The purpose of this study is to ensure an amicable material quality control in the construction site through investigating a process which can impact the construction material quality. For it, a worker interview and questionnaire survey was conducted through a direct field visit. The visited construction sites are composed of 79% construction site and 21% engineering site. As the respondents of questionnaire survey, the quality control workers were 72% of total respondents. Next, the construction worker, handymen, field representatives and others formed 7%. The interview with the quality control staff was conducted with the items including the construction site quality control guide, incoming inspection and material management. Through this survey, the problems of quality control by progress phase were derived. It could be known that the management and measures by each phase were urgently required. It also was indicated that a selection of low-priced material caused by low price bidding could badly impact the construction and safety. Also, in relation to the opinions such as the insufficient quality control and heavy work-load, the improvements are required. For the effective quality control in the construction site, the material quality control procedures suitable for the phase of construction progress must be presented in the present quality control. Also, the standards for it need to be established.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2006년도 추계공동학술대회
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• pp.373-383
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• 2006

Logistics is one of the most important factors to manage a stream of materials in economic environment. Establishing effective logistics system needs to consider some constraints which are fluctuation of materials volume, a long distance between makers and consumers, one way logistics and small quantity batch production. It is estimated that Unit Load System should be a powerful method to cope with those problems. It helps to realize the key issues which are Standardization and Logistics Pool System The Material Unification of Logistics System is able to participate in all kinds of industries including manufacturing, distribution and logistics. This system has some merits which are a long distance transportation cost down, product recovery, and treatment in the unbalance of demand and supply caused by unstable materials volume. Four strategies of Material Logistics Model are Packing Rationalization, Logistics Pool System, JIT System application and establishing effective infrastructure. The Material Unification Of Logistics System based on Unit Load System achieves efficiency of logistics and largely decreases moving cost.

• 한국생산제조학회지
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• 제25권4호
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• pp.258-265
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• 2016

Digital printing has been used in various industrial areas, including semiconductor manufacturing and textile printing. However, implications on ceramic textile have not been well established so far. Printing high-viscosity materials requires an understanding of their behavior. An inorganic high viscous material with a viscosity range of 20-30 cps is analyzed using a viscometer and through X-ray diffraction. In this study, a digital printer is designed and assembled using a high-viscosity material with software for PC control, resulting in reduced processing at a fast area velocity of $20m^2/hr$. The present study demonstrated that the printer is capable of controlling the shape of the drop mass to smear ink smoothly onto the ceramic surface under an economic budget. In addition, to avoid any difficulty in color management, the ceramic printer is equipped with an independent color management system designed to cope with images on a highly viscous material.

• 한국입자에어로졸학회지
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• 제19권4호
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• pp.145-154
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• 2023

Granular bed filters are widely used to remove particulate matter in flue gas and are filled with various shapes of packing material. The packing material plays an important role in determining the overall collection performance, such as pressure drop and collection efficiency. The pressure drop of a granular bed filter has been calculated using the Ergun equation, while the collection efficiency has been predicted using the log-penetration equation based on the single sphere theory. However, a prediction equation of collection efficiency for a granular bed filter filled with non-spherical packing materials has not been suggested yet. Therefore, in this study, three different shapes of packing materials (sphere, cylinder, and irregular) were prepared to propose a prediction equation. The pressure drop and collection efficiency in a granular bed filter filled with each shape of packing material were measured experimentally and compared with theoretically predicted values. We found that experimentally measured pressure drops matched well with values theoretically predicted using the Ergun equation considering the shape factor. However, experimental collection efficiencies were higher than theoretical ones predicted by the log-penetration equation using the single sphere theory. We modified the log-penetration equation by employing a shape factor and found a good relationship between experimental and theoretical collection efficiencies.

• 경영과학
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• 제10권2호
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• pp.43-59
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• 1993

A production control information system developed for multi-product, small-lot-sized production is presented. The system is composed of interrelated modules for production planning, shop floor control, and inventory/material management. The architecture of the system, functions of each module, and information processing procedures of each function are discussed.

• 전기저널
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• 8호통권92호
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• pp.28-31
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• 1984

• 가족자원경영과 정책
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• 제1권1호
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• pp.89-100
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• 1997

The purpose of this study is to investigate the sages’ philosophic view of home economic management in Chosun dynasty. The research method is to review literatures such as Jangbosanrimkongje, Songhosasal, Sasojul, Nehun, Geneusa, Mocminsimsa and Dasanmusun. The major points of this study were as, 1) Sages mastered that the primary principle of home economic management is to control the material desires. 2) Sages believed that home life management is required the lowest materials, and those materials enough are able to obtained through diligence, frugality, thift and savings. Therefore Sages advised us that each of us lives a diligent, frugal, thrifty and saving life.

• 컴퓨터교육학회논문지
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• 제7권4호
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• pp.121-129
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• 2004

교육인적자원부(2004)의 이러닝 학습체제 구축을 위한 실태 및 요구조사에 따르면 교수 학습 자료의 질에 대한 심각한 문제가 제기되고 있다(총 4717명 중 1775명 (37.68%) 이 현재 교수 학습 자료의 질적인 문제가 심각하다고 응답하였다). 뿐만 아니라 한국교육과정평가원의 연구(2002)에 따르면 웹 사이트, 기관 소장 자료, 그리고 교사 개인이 서비스하는 자료들 7만 건 중 약 8.7%에 해당하는 자료만이 우수 자료로 평가되었다. 현재 유통 보급되는 교수 학습 자료에 대한 질 관리의 필요성이 대두되고 있으나 이를 뒷받침하는 구체적인 정책적 대안이 제시되고 있지 못한 실정이다. 즉, 체계적으로 교수 학습 자료에 대한 내용적인 질 관리를 할 수 있는 시스템이 개발되어 있지 않다. 본 연구의 궁극적인 목적은 기존 혹은 신규 교수 학습 자료에 대해 내용적 질 관리를 할 수 있는 시스템을 개발하고 적용하는데 있다. 본 연구의 결과로 개발된 교수 학습자료 질 관리 시스템은 16개 시 도를 포함하여 국가 수준의 질 관리 체제 수립을 위한 기초가 될 수 있으며, 뿐만 아니라 교수 학습 자료에 대한 실질적인 질 관리가 이루질 수 있을 것으로 기대한다.

• 산업경영시스템학회지
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• 제43권4호
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• pp.133-141
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• 2020

Up to date cosmetic OEM/ODM (original equipment manufacturing/original development manufacturing) industry receives attention as a future growth engine due to steady growth. However, because of limited research and development capability, many companies have employed commercial management platforms specialized for large-sized companies; thus, overall system effectiveness and efficiency is low. Especially, MRP (material requirement planning) system introduced originally in 1970s is employed to calculate the requirement of the parts. However, dynamic nature of production lead time usually results in incorrect requirements. In addition, its algorithm does not consider the capability of the production resources. Also, because the commercial MRP system calculates all subcomponent for fixed period, the more goods have subcomponent, the slower calculation is. Therefore, conventional MRP system cannot respond complicated situation in time. In this study, we will suggest a new method that can respond to complicated situations resulting from short lead time and urgent production order in Korean cosmetic market. In particular, a distributed MRP system is proposed, that consists of multi-functional and operational modules, based on the characteristic of the BOM (bill of material). The distributed MRP system divides components (i.e. products and parts) into several fields and decrease the problem size; thus, we can respond to dynamically changed data any time. Through this solution, we can order components quickly, adjust schedules and planned quantity, and manage stocks reasonably. In addition, a prototype of the distributed MRP system is presented in this paper, in which ERP (enterprise resource planning) sever data is associated with an excel spreadsheet via MSsql. System user interface is implemented by a VBA (visual basic for applications) tool. According to a case study, response rate for delivery and planning achievement rate were enhanced about 20%, and inventory turnover was also decreased. Consequently, the proposed system improves overall profit.