• Journal of the Korean Society for Industrial and Applied Mathematics
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• v.27 no.4
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• pp.311-323
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• 2023

This paper introduces the industrial problem, the solution, and the results of the research conducted with Define Inc. The client company wanted to improve the performance of an object detection model on the floor plan dataset. To solve the problem, we analyzed the operational principles, advantages, and disadvantages of the existing object detection model, identified the characteristics of the floor plan dataset, and proposed to use of YOLO v5 as an appropriate object detection model for training the dataset. We compared the performance of the existing model and the proposed model using mAP@60, and verified the object detection results with real test data, and found that the performance increase of mAP@60 was 0.08 higher with a 25% shorter inference time. We also found that the training time of the proposed YOLO v5 was 71% shorter than the existing model because it has a simpler structure. In this paper, we have shown that the object detection model for the floor plan dataset can achieve better performance while reducing the training time. We expect that it will be useful for solving other industrial problems related to object detection in the future. We also believe that this result can be extended to study object recognition in 3D floor plan dataset.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.22 no.1
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• pp.233-251
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• 2023

Metropolitan buses are managed as either a direct seat type or a metropolitan express type according to the 「Passenger Transport Service Act」. However, a management system that reflects the characteristics of metropolitan buses is not currently established. Therefore, in this study, the driving characteristics of metropolitan buses, dangerous driving behavior characteristics of metropolitan bus drivers, metropolitan bus accident characteristics, and the safety management system of domestic and foreign buses and other means were investigated. Through this, a plan for strengthening the safety management of metropolitan buses suitable for Korea was presented by dividing it into short-term and mid to long term. The short-term plan is a plan that can be carried out through consultation between metropolitan bus agencies and transportation companies, and the mid to long term plan is a plan that can be implemented only when related laws are revised. Through this study, it is expected to serve as an opportunity for in-depth discussions by the government, business operators, and related experts to strengthen the safety management of metropolitan buses.

• Journal of The Korean Digital Architecture Interior Association
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• v.8 no.2
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• pp.83-92
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• 2008

This study is about architectural design for rural housing block redevelopment for districts with existing residents considering sustainable development. The study suggests development direction focusing on preserving the regional characteristics, and presentation of suburban-style housing complex reflecting on the future tenant's individuality and demand. The preexisting development approach for suburban-style housing complex which was planned by the developer, failed to recognize taste of the future tenants. Profitability being the priority, it also resulted in a serious environmental disruption. In this development however, through a systematic direction for site development and site analysis, conducting surveys through future tenants, attempted for a continuous growth of the community. The study is presented covering the following areas; site's pathway system, nature conservation plan, lot plan, land use, arrangement plan, housing plan and community facility.

• Journal of the Korean Institute of Landscape Architecture
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• v.19 no.3
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• pp.27-40
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• 1991

For the establishment of district planning in natural parks, vegetationin the most significant point. Consequently, district plan should be made basically under phytosociological investigations. The purpose of this paper is to conserve vegetation in the district planning at natural park(Nam Han San Sung provincial natural park). The result of vegetation survey are as follows : As an actual vegetation 13 communities are recognized. Those are Quercus mongolica-Carpinus laxiflora community, Quercus mongolica-Rhododendron schlippenbachii community, Quercus serrate community, Betula platyphylla var. Japonica community, Quercus dentata community, Quercus mongolica-Pnuus densiflora community, Quercus acutissima community, Robinia pseudo-acacia community, Alnus hirsuta community, Castanea crenata community, Quercus variabilis community, Pinus densiflora community, Pinus rigida community, weed community on cultivated land(Form land), Larix leptolepis reforested land, cut over area and non-vegetation area. The grade of vegetation naturalness was divided into five degrees by characteristics of actual vegetation. I intended to make zoning plan for protection of vegetation with a special attention to the grade of vegetation naturalness and I discussed the necessity of the improvement of existing district plan. District plan was proposed as Fig. 5.

• Journal of The Korea Institute of Healthcare Architecture
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• v.8 no.1
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• pp.21-28
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• 2002

As hospitals change continuously and rapidly, the way of growth and change becomes another important factor in the design of a hospital. The hospitals are adapted for the continuous growth and change during their life span. But the hospitals built in 1970's and 80's have been expanded and reconstructed without any plan of growth and change. So, there is required to the architectural planning on the remodeling and modernization strategy of general hospitals. The purpose of this study is to provide the fundamental data for the reasonable design planning and the basic principles of the construction plan in the hospital remodeling. Thus, this study is to investigate and analyze the characteristics of hospital remodeling, the remodeling planning, and the scheduling process in terms of construction. As a result, this study would apply to design guideline for the remodeling of general hospitals.

• Communications for Statistical Applications and Methods
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• v.17 no.1
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• pp.89-98
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• 2010

In this paper, a two-stage group sampling plan based on the time truncated life test is proposed for the Weibull distribution. The design parameters such as the number of groups and the acceptance number in each stage are determined by satisfying the producer's and consumer's risks simultaneously when the group size and the test duration are specified. The acceptable reliability level is expressed by the ratio of the true mean life to the specified life. It was demonstrated from the comparison with single-stage group sampling plans that the proposed plan can reduce the average sample number or improve the operating characteristics.

• Journal of the Korean Institute of Rural Architecture
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• v.7 no.1
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• pp.11-18
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• 2005

This study analyzes the feasibility of constructing Geochang high technology industrial complex and present s the site, plan and development strategies. As a result, first, the Wallpyung area, superior form others in site characteristics, accessibility, surrounding facilities, was decided to the plan site. Second, the plan tries to adapt in the environment and maximizes the spatial link and user conveniences. Third, a transportation plan includes a circulation street network that adapt in topography, and considered future traffic situation and accessibility, hierarchy of road etc. Fourth, it also plans to locate a environment-friendly central park in the middle of site and buffer areas along at the outer sites and both sides of the roads. Fifth, for the development, it is advised to construct a public institution which manages the whole project and it is necessary to build a cooperate system.

• Proceedings of the KSR Conference
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• 2005.05a
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• pp.144-150
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• 2005

After the historic opening of the first section of KTX(Korea Train eXpress), it has been made changes three times in a plan to pass through cities of Daejeon, Daegu in the construction of the high speed train's second section(underground${\to}$ on ground${\to}$ under ground${\to}$ on ground). Thereafter, it has been repeatedly argued that the plan to pass through underground caused many problems such as prevention of an accident in tunnel, the difficulty of maintainence, the disadvantage of passengers' moving line. Thus construction on ground plan is coming up again with relation to the interest among local people. There have been lots of national budget loss, construction period delay in this project and people hardly trust policies about national project and nor do engineers. It will be presented that the railway line which is accorded with the characteristics of region, an agreement with local communities about national project, the reasonable procedure to determine how to pass through cities, resolve the conflict among neighborhood, and the role of engineers.

• Journal of Agricultural Extension & Community Development
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• v.17 no.3
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• pp.549-585
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• 2010

Our global environment and ecology are now facing crisis due to the hrincreased waster materials caused by reckless abuse of resources and energy with the continuous development of our society. Therefore the whole nation should recognize the environmental pollution seriously and should accept sustainable development principles. The country is looking for actions against the problems in various ways. The introduction of reckless and duplicating western housing plan should be ceased but a new housing plan conforming to our nature should be found. In this regard, it is believed that it is a good alternative to succeed tradition and identity of Korean housing plan and suggest a new plan for better ecological housing by analyzing the environment friendliness of our traditional Korean houses. In this study, the traditional residential components were divided into physical and design aspects and the characteristics of environment friendly Korean traditional houses were analyzed.

• Journal of the Korean Professional Engineers Association
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• v.33 no.2
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• pp.22-33
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• 2000

The 4th National Comprehensive Planning is a blueprint of national plan to be accomplished by the year 2020. This article indicates grounds of establishing the plan, characteristics and problems of the plan. Following is the principal contents which are treated in the article; 1st, strategy of constructing opened and combined land axis, 2nd, competency intensifying strategy by areas, 3rd, constructing health and pleasant national environment,4th, strategy for organizing express transportation and information network through the whole land, 5か, special features related building basis of cooperation interchange between North and South Korea. In the conclusion, although there were some problems through 3 times national comprehensive planning, this plan should be helpful to develop nation keeping balance for which construction and preservation would be harmonized appropriately.