• Journal of Korean Society of Industrial and Systems Engineering
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• v.16 no.27
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• pp.73-82
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• 1993

In this paper, We determine the expected travel time for several forks Storage/Retrieval machine which is allowed multiple stops in aisle. When throughput is increased, We propose adding to fork number of each S/R machine rather than adding to number of S/R machine, We also describe such a model which determines the optimal number of each several forks S/R machine subject to constraints on the hourly throughput and warehouse dimensions. Numerical example is presented to compare warehouse shapes against each single fork, twin forks, triple forks S/R machine for various throughput values.

• Proceedings of the Korea Multimedia Society Conference
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• 2000.04a
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• pp.382-385
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• 2000

IHWA는 기존의 객체 컴포넌트를 통합함으로써 새로운 응용프로그램을 작성할 수 있는 CBSE(Component Based Software Engineering ) 기법을 바탕으로 개발되어진 웹 기반 정보 저장/검색 시스템이다. 이 시스템은 1997년에 그 1차 버전이 개발되어 사용되어 왔으며 현재는 보다 나은 견고함과 일반성의 제공, 그리고 전자상거래 영역에 대한 준비를 위해 시스템에 대한 중요한 수정작업이 진행중에 있다. 본 논문에서는 새로운 IHWA시스템의 설계에 적용된 원리 및 내용을 설명하고 특히 정보수집 서비스를 제공하기 위해 필수적으로 요구되는 정보 수집기들의 구조 및 구현에 대해 설명하고자한다.

• Journal of Korean Institute of Industrial Engineers
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• v.33 no.2
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• pp.227-236
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• 2007

This paper proposes a method for designing stacking warehouses of pyramid type which can be found in storage rooms for steel coils, paper rolls, and drums for oils. Formulas were derived for estimating the expected travel time of cranes and the expected time for rehandling activities. Based on the derived formulas, this study derives the cost function for determining the optimal numbers of rows, bays, tiers of stacks under the condition that the requirement for storage space is satisfied. Numerical examples were given.

• Journal of KIISE:Databases
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• v.28 no.1
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• pp.42-47
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• 2001

실체뷰는 대량의 데이터웨어하우스에서 질의처리를 효과적으로 수행하기위한 대안으로서, 그 핵심은 각 데이터 원천에서의 데이터변화에 대응한 복합적인 뷰의 효과적인 관리 문제이다. 본 연구에서는 우선 실체뷰 관리에 관한 기존의 연구들을 일별함에 있어서 즉, 갱신의 주체문제, 갱신객체, 및 갱신시간 문제의 세가지 관점에서 본 연구의 위치를 결정한 다음, 대수적 접근법으로 복합뷰 갱신문제가 복잡해지는 원인을 규명하였다. 그 해법으로서 참조무결성을 활용한 복합 조인뷰의 갱신 알고리즘을 제안하면서, 여러 가지 참조무결성 제약조건과 트랜잭션과 관련된 자체갱신적 새로운 해법을 제시했다.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10b
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• pp.235-237
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• 2003

데이터베이스에 저장된 수많은 자료들을 사용자의 질의에 맞추어 웹상에서 표현해주는 것이 바로 리포팅 툴의 역할이다. 그에 관한 연구들로 인해서 EASY BASE, ReportShop 과 같은 여러 리포팅 툴들이 상용화되고 있다. 하지만 사용자가 보다 쉽고 직관적으로 XML문서를 작성하고 관리할 수 있는 툴들은 미흡한게 사실이다. 이 논문에서는 리포팅 툴의 기본이 되는 쿼리 결과를 웹상에서 표현해주는 xml 을 설계하였다.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2022.10a
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• pp.288-289
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• 2022

본 연구에서는 FDS(Fire dynamic simulation)를 이용하여 대형물류창고 화재에 대한 국내 스프링클러 설비 설치기준(NFSC)과 미국 방화협회규정(NFPA)의 스프링클러 설비 설치기준을 각각 시뮬레이션하여 발열량 및 반응물질, 초기 화재진화 정도 등의 데이터를 비교 분석하여 대형물류창고에 대한 스프링클러설비 설치기준 개선방안을 제시하고자 한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.6
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• pp.1214-1219
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• 2009

Many studies are being applied for various parts of USN (Ubiquitous Sensor Network) technology. The world's large retail stores and warehouses that apply logistic management are also studied. With this, USN technology is increasing in its utilization. However, to handle and process real-time data will never be never easy if these huge warehouses are using too many sensors, and real-time data correction is almost impossible. Software implementation and high-speed hardware are insufficient to solve these complex problems. To solve this problem, a key solution is to implement high-speed software. Hence, this paper suggests a USN logistics management system that applies pipelining techniques for efficiency in real-time data correction and reduces errors of generated values.

• Journal of Intelligence and Information Systems
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• v.12 no.3
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• pp.33-46
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• 2006

In order to decrease the number of handles, speed up retrieval operations, and manage products efficiently, the investment of facilities such as the installation of the storage equipment and the enlargement of the storage area may be attempted. However, the same objectives can be accomplished by utilizing the existing storage area efficiently. In many types of storage facilities, because of the limitation of storage areas, products are usually piled up, which may cause rehandles of inventories. Rehandles influence significantly the handling efficiency of warehouses. This study develops methods for minimizing rehandles of inventories to improve the operational efficiency of warehouses. A mixed storage problem is addressed for minimizing the expected number of rehandles. Optimization models are proposed and the genetic algorithm is applied to solve the problem.

• Journal of Food Hygiene and Safety
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• v.26 no.4
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• pp.283-288
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• 2011

We surveyed the sanitary conditions for 17 cold and frozen food storage warehouses in Korea, using the following 5 inspections items: "putting into warehouse (A)", "prevention of cross-contamination (B)", "storage management (C)", "temperature control (D)", and "management of records and documents (E)", We included 20 detailed items. The results of distribution for frequency by five major inspection items showed that "(E)" was the highest, the next "(D)", "(C)"; and "(B)" was the lowest. In the correlation of inspection scores between total scores, "(B)" and "(C)" were highly related to the total score, therefore, the higher score of "(B)" or "(C)", the higher for the total score. In details of inspection items, "the management of cross-contamination upon taking product out of the warehouse" had the lowest score with a mean, of $2.67{\pm}1.80$, and also ranked as first of the 20 items.

• Journal of Distribution Science
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• v.14 no.10
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• pp.153-164
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• 2016

Purpose - In general, large companies have larger organizations, funds, and systems to provide more effective and efficient services in the market. However, development needs to support the livelihood of ordinary citizens who work for small businesses as well. This research suggests that a new distribution channel, called a "foothold style Kosa mart," that cooperates jointly with a distribution center and a large discount mart can provide direct solutions to small and mid-size distributors. This new distribution channel can achieve a limited type of "Nadle shop (small supermarket) foster project" related to building a joint distribution center and improvement in wholesale supply. Research design, data, and methodology - Data about the Korea distribution situation, the Nadle stores, and the logistics centers were collected from literature, Statistics Korea, journals, and reports. Specifically, we investigated information about Kosa Mart and Nadle stores. We focused on the redesign of the distribution center for the Nadle store. Results - The Kosa Mart distribution center now includes 18 warehouses, and has been handling 2000-3000 items. Most of the warehouses have been simply designed and items loaded and stored without refrigeration; thus, it is possible to store only products of certain manufactured goods. The current logistics center has no wholesale function because it failed to resolve the joint purchasing and product supply issues of competitively priced products. Conclusions - This study aimed to identify ways to strengthen the competitiveness of small- and medium-sized retailers. A Kosa Mart redesign aims to unifying the logistics center, stores, and customers. First, the joint wholesale logistics system, equipped with an integrated ordering system, needs to process customer orders and store orders at the same time. Second, excellent small business product development has to connect with production. Third, the store composition needs to support a shipping hub. Fourth, the Mart differentiates itself from convenience store goods by supplying regional and specialized products to customers. Fifth, a service buying agent and direct transactions between producers and consumers need to be established, and exhibits and displays of goods need to be improved.