• Journal of Korean Institute of Industrial Engineers
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• v.40 no.4
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• pp.424-427
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• 2014

In this paper, we consider a production system in which the items are produced by batch. For a production planning of the system, we formulate a lot-sizing problem in which each production should be a multiple of a given unit batch and backlogging is allowed. We propose an optimal dynamic programming algorithm for the plan whose complexity is $O(T^2)$ where T is the maximum number of periods in a plan.

• The Journal of Natural Sciences
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• v.11 no.1
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• pp.11-14
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• 1999

Let G be a compact Lie group and let $\rho$ : G $\rightarrow O(2) be a homomorphism. Denote by V the G-module associated with $\rho$ and by S(V) the unit circle of V. In this paper, we show that if G is abelian, then a real G-vector bundle over S(V) is isomorphic to Whitney sum of real G-line or G-plane bundles.

• Journal of the Architectural Institute of Korea Planning & Design
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• v.34 no.8
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• pp.95-104
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• 2018

This thesis aims to determine the size of the rear garden and its architectural dimension at Gyeongbok Palace constructed during King Gojong's reign by analyzing Bukgyeol dohyeong(Site plan of Gyeongbok Palace) and Bukgyeol huwon dohyeong(Site plan of Rear Garden of Gyeongbok Palace) applied of scale unit and made from 1905 untill 1909. The results of this study were as follows; With respect to its site, the maximum horizontal length is estimated to be around 448m, the maximum vertical length is around 544m, and the entire area is around $203,905m^2$. Concerning the architecture, the total number of the buildings made up of one or more gan(間) is 32 and the total number of its gan is 292.5, etc.

• Journal of the Korean housing association
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• v.17 no.5
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• pp.159-167
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• 2006

This study is analyzed comparison about the component ratio of dwelling space in the existing plan and residents dwelling needs. Also, it is analyzed the residence factors of area component change that residence satisfaction and importance according to the behavioral patterns of residents. The results are as follows. 1) Total area component ratio of the existing plan was 39.5:40.8:19.7% and dwelling consciousness one was 36.4:44.0:19.6%. Compared private space with public space, public area requested increase rather than private area. 2) In the 17, 19pyung-types dwellers are not happy about dining kitchen and utility room and types of 21, 23pyung-types are dissatisfied in room-2 and room-3, living room and dining kitchen are dissatisfied, too. In case of areas over 25pyung-types are dissatisfied in room-3 and room-4. 3) The behavioral patterns of apartment residents were classified six acts, and the most significant factors are appeared associated the acts of ceremony, relation of neighborship, and reception. The next significant factors are appeared associated the acts of family relation, about food life. So, it is concerned with the scale of public room.

• Journal of the Korean Chemical Society
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• v.45 no.6
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• pp.595-602
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• 2001

The basic tenet of science education by the 7th national curriculum for middle school students is teaching by learner's academic levels. It is a kind of new approach to both of teachers and students, but there has been little preparation in school fields for the new approach. Therefore, this study reviewed the characteristics and constraints of the approach, and suggested the types of learning methods for the approach. And then this study explored the guidelines for writing a lesson plan for the science education by the 7th national curriculum. Specifically, this study presented an example of lesson plan for a unit of middle school chemistry.

• Proceedings of the KSR Conference
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• 2007.11a
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• pp.1428-1432
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• 2007

One of the most important targets of transportation is to transport human and commodities to the destination safely. Railway has low risk, compared with land, ocean and flight route and it assures high security as well as high speed driving, since it runs on regular track. However, train accident may result in tragic accident due to small carelessness, so special event recorder is preferably used in order for clarity of responsibility in case of accident, maintenance of signal device and defect analysis. JRU(Juridical Recorder Unit) for ATC/ATS/ATP can be more advanced event recorder. Event recorder of KTX-I which is running now is installed one by one on each leading car and last car, and operation plan of event recorder in case of single trainset is suggested. But regarding train operation of multi-coupled trainset operation such as KTX-II, more detailed study is required for event recorder revitalization and record data process method. Therefore, this research aims at operation plan used in existing event recorder, and suggests effective operation and management plan of event recorder in multi-coupled trainset such as new High Speed Train.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2004.11a
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• pp.43-48
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• 2004

The purpose of this study is to analyze the typological characteristics of super high-rise housings in Hong Kong. The results are as follows; 1) The Plan types of the residential building in Hong Kong are mostly tower types and they show lots of curves on the external resident blocks so each resident families can face maximum open air. 2)Household arrangements or resident families form are shown as symmetrical and systematic type of structures that centers around the core. 3)The core types are mostly central core types and a portion of central core is planned to place void and alight garden for improving the lighting and ventilating problems. 4)If we review our room arrangements, they are arranged from entrance kitchen, livingroom bedroom to bathroom to the end. Livingrooms and dinning rooms are normally formed together. 5)If external resident blocks are facing the open air, one of the surface is on view axis, kitchen or bathroom are symmetrically located on the other side which faces the units for the purpose of ventilating.

• Architectural research
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• v.1 no.1
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• pp.31-40
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• 1999

In this age of "Information", many people consider it a deterrent to information flow to provide a hierarchy with private rooms in a modern office layout. There are others, however, who insist that visual and acoustical privacy are more important than any other design factor in achieving higher productivity. The debate may never end, but the partitioned open plan, which is a new form of the vast open plan, has merits of each concept - open and closed layout. Consequently, office design has dramatically shifted to partitioned open planning, with shorter, temporary walls or partitions, originally intended for increasing privacy and diminishing hierarchy, yet still keeping flexibility in spatial organization. The introduction of low-level partitioned spaces in an office layout, however, produces a complicated lighting design problem. Obviously, accurately predicted daylighting performance data are needed not only for daylighting design but for artificial lighting system design. Scale models of 12 sets of unit partitioned spaces are constructed and extensive scale model measurements of both daylight and reflected sunlight have been performed within an artificial sky simulator. The prototype-building interior is modeled with different partition configurations, each of which is modeled using the different envelope geometry and exterior configurations, and then the variations in interior light levels are estimated. The result indicates that partitioned spaces employed in an open plan of modern offices still offer a large potential for daylighting and energy saving as well. Much of the savings may derive from the cumulative effect of reflected sunlight. Optimal design for building envelope geometry and exterior configuration promises additional savings.

• Land and Housing Review
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• v.10 no.3
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• pp.77-87
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• 2019

In Korea, the modular construction method was applied to the construction of facilities such as military barracks and school dormitories, beginning with the pilot project of Seoul New Elementary School in 2003. In 2017, public modular houses were supplied to Busan(Yongho-dong) and Seoul(Gayang-dong), and modular housing is expected to continue to be supplied in the future. However, there is no clear construction standard for the modular housing construction yet, and there are few cases where the infill modular system is applied. Therefore, this study established the work breakdown structure and proposed a standard process focusing on the infill modular system applied to the construction of Dujeong-dong modular house in Cheonan. Level 1 of the work breakdown structure by construction stage of Infill modular was defined as modular manufacturing, assembly, and finishing process. Level 2 was defined as preparation, modular production, modular infill, modular fixing, floor plastering, building finishing, and other site finishing. Level 3 is defined as 57 detailed unit work of infill modular construction. The standard process of infill modular is proposed for the assembly stage that is commonly applicable to infill modular housing construction. The results of this study can be used for the process plan, transportation plan, lifting plan of modular housing construction.

• Journal of Intelligence and Information Systems
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• v.12 no.4
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• pp.39-51
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• 2006

This study addresses how to plan purchasing and leasing of containers to satisfy the demand on containers. The problem can be further decomposed into the long-term planning and the short-term scheduling. The long-term plan specifies the composition of owned containers, long-term leasing containers, and short-term containers. The short-term plan considers the seasonality of demand and determines the time of leasing and the amount of the short-term and the long-term leasing containers. The length of the planning horizon is 10-20 years for the long-term planning, while it is one year for the short-term planning. The time unit is one year for the long-term planning, while it is one month for the short-term planning. This study discusses how to estimate the demand of containers and proposes deterministic models for scheduling purchasing and leasing of containers.