• Journal of the Korean Association of Geographic Information Studies
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• v.18 no.2
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• pp.161-173
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• 2015

The guarantee of transportation for elderly and handicapped people is increasingly necessary owing to their growing social and economic activity. In March of 2013, a partial amendment to the law for transportation of the vulnerable was made by the government, to make more convenient transport a legal requirement. The amendment describes standards for the installation of transport facilities, and its support available. However, the adjustment of low-floor bus routes is not included. Therefore, low-floor buses are operating without consideration for the handicapped. This study evaluates the current low-floor bus system user experience by considering the residential distribution of vulnerable customers and analyzing their reasons for using public transport. As a result of this work, adjustments to current bus routes are proposed. The residential distribution of vulnerable people has been assessed using the supporting materials of the urban renewal project in Busan City, and their reasons for using public transport have been collected by a survey of the target user groups. The results show that group A, which has good accessibility, was in high demand, but provided the most limited service. Whereas group C, which also has good accessibility but was in low demand, provided its service most frequently. The data show the supply and demand inconsistencies of low-floor buses, and the inefficiency of bus route allocation. Therefore, this study proposes improvements to current methods for the effective operation of low-floor buses.

• Journal of Korean Tunnelling and Underground Space Association
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• v.21 no.5
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• pp.689-698
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• 2019

In tunnel excavation by TBMs, a cutterhead, which practically excavates the ground, is an important part directly affecting net penetration rate. Most of the researches on the cutterhead design that have been carried out until now are on the cutter arrangement. It is difficult to find a study for the effect of the scraper installation direction on TBM excavation although same cutterheads except for direction of the scraper are used in Korea. Therefore, this paper shows how the direction of scraper installation affects shield-TBM excavation. Discrete element method was used to identify the effect of scraper installation direction on shield-TBM excavation. When the scraper installation direction was outward, the amount of particles per unit time flowed into the cutter head opening was smaller than when the scraper installation direction was inward, and more loads were applied to the cutterhead.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.9
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• pp.5419-5424
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• 2014

A weld scallop is a small quadrant or half circle type hole installed in the weld line cross area for easy welding operation. Many types of T-bars with a scallop can be welded in a block assembly stage in shipbuilding. The difficulties arise from the fact that scallops are to be filled by build-up welding after welding of the cross line is complete. In this study, a non-scallop block joint welding method was developed using special type CBM (ceramic backing material). The wedge shaped CBM was devised to insert a CBM into just the V groove of weld line cross area without weld scallop. A saw-toothed shape was adopted for easy cutting of the unnecessary part in the CBM fitting process. The applicability of the developed method was verified through welding experiments based on the yard welding conditions.

• Korean journal of communication and information
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• v.39
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• pp.324-354
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• 2007

Facts, which constitute news, are as free as air. When they are transformed into news via labor and capital investment of a news organization, the news is deemed to have property values, and the media can claim exclusive rights over the news. The copyright law protects the originality of a work, the uniqueness of reporter's analysis, the selection of words, the arrangement of materials, and the emphasis given on particular points. The name of the game of copyright infringement lies in the infringement of the similarity of the method of expression, not the infringement of the subject. Even though news articles convey information by specifying factual elements of an event or accident, they still have some originality. The judgement that news articles lack of originality is inconsistent with the purpose of the copyright law. Therefore, the law should be amended to articulate that the unauthorized use of news articles without a proper citation shall be the subject of legal action, and courts should decide related cases accordingly.

• KOMUNHWA
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• no.56
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• pp.29-58
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• 2000

A lot of dolmens without burial chamber have been brought to the light around Honam (southwestern provinces of Korea) area. Even though they are commonly classified as dolmens of surrounding stone type(圍石式), it seems necessary to put under the category of

• Journal of the Korea Computer Industry Society
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• v.7 no.1
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• pp.17-22
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• 2006

Variable contents are extracted and used to improve the correctness of the retrieval in the content-based in age retrieval. This way use the physical feature for the retrieval. In this way of retrieval, the user has to know the basic physical features and spatial relationship of target images that he wants to retrieve. There are some restriction to reflect the user's intend. We need the retrieval system that reflect the user's intend. In this paper, we propose an emotion-based retrieval system. It is different from past emotion based image retrieval in point of view that it uses relevance feedback to estimate the users intend and it is easily combined with past content-based image retrieval system. The features and similarity measures are adopted from MPEG-7 color descriptors which are proper retrieval of large multimedia databases. We use wallpaper images for the experiment. The result shows that the system get successful result.

• The Journal of Society for e-Business Studies
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• v.23 no.3
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• pp.51-64
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• 2018

Recently, the magnitude and frequency of the natural disaster have been increased, the damage has become severer. The importance of disaster response system to relieve the damage has arised continuously. This study has tried to develop the algorithm to solve the facility location and size problem in emergency logistics. A facility in the emergency logistics has various roles in victim care, casualty treatment, relief resource management and relief vehicle assistance. Moreover, the location of facility in emergency logistics has to consider the safety and reliability. To gather these information, information management system with IoT sensors are suggested. The location problem in this study also covers various features to response various demands in disaster. To solve this problem, this study suggested MIP based algorithm. Scenario based simulation experiments are conducted to verify the performance suggested algorithm.

• Korean Journal of Heritage: History & Science
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• v.43 no.3
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• pp.180-207
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• 2010

Technological innovations in the 21th Century greatly change the society. The radical advance in computer science brought changes and increased efficiency into society in general. The field of archaeology is also highly influenced and attempts to improve previous manually conducted field survey and research have been actively made. In order to supplement incomplete data set from archaeological excavation, the ways to use computer have been highly explored. GIS is one of them. However, use of GIS has been limited to document locations and to produce distribution map of features using digital map. There are no proper guides to employ GIS for academic research, so that it is hard for beginners to learn how to make use of GIS. In this paper, functions of GIS are introduced even for beginners, including definition of GIS and its archaeological use. It is also explained how to get DEM from digital map to do spatial pattern analysis. Various GIS special pattern analyses using DEM and 3D simulation are presented, as well.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.4A
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• pp.457-463
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• 2008

The longitudinal stiffener performs its role to increase the local buckling strength by making simple support upon compression flange. In the recent researches, it is investigated that compression flange with point supports on certain arrangement reveals the same strength with longitudinal stiffeners. From this results, it is predictable that shear stud could perform the role of longitudinal stiffener if shear stud embedded in concrete satisfies the requirement to point-support under yield stress of the compression flange. In this study, the researches were performed to investigate the optimally required arrangement space of longitudinal point-support for which the shear stud replacing the longitudinal stiffeners and simultaneously determine the required numbers and space of shear stud for completely composite behavior between compression bottom flange and bottom concrete on the double composite girder system.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.253-253
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• 2022

수문조사 방법 및 기준은 각 국가별 기후, 유역 및 하천특성에 따라 다르게 제시되고 있으며, 세계기상기구(WMO)나 국제표준화기구(ISO)에서는 국제적으로 통용될 수 있는 기준을 제시하고 있다. 대부분의 국가에서는 국제기구 또는 수문조사 선진국(미국, 일본, 영국 등)에서 제시한 기준 및 방법을 도입하여 적용하고 있으며, 국내의 경우도 국제기준과 더불어 미국의 기준과 우리나라와 기후, 지형 및 하천특성이 비슷한 일본의 기준을 많은 부분에서 도입하였다. 유속계에 의한 유량측정 시 측선수를 늘리면 정확도를 높일 수 있지만 대하천 또는 수위(유속)가 급변하는 경우에는 측선수를 많이 해서 측정시간이 길어지면 오히려 정확도를 떨어뜨릴 수 있다. 특히, 국내에서 홍수시 신속한 측정에 사용되는 부자와 전자파표면유속계는 기존의 회전식유속계 측선수 기준을 적용하는 것은 적합하지 않다. 이에 따라, 우리나라 수문조사 전담기관인 한국수자원조사기술원에서는 전자파표면유속계 측선수 기준을 실무적으로 제시하고 있으나 이에 대한 기술적인 검토가 부족한 실정이다. 본 연구에서는 2016년~2020년까지 한국수자원조사기술원에서 측정된 58개 지점의 총 739개의 전자파표면유속계 측정성과에 대하여 수면폭 및 측선수 현황을 살펴보았다. 한국수자원조사기술원 일반기준 이상 측선수 비율은 646개(87.4%), 긴급기준 이상 측선수 비율은 739개(100.0%) 그리고 전체 평균값 이상 측선수 비율은 404개(54.7%)로 나타났다. 일반기준 이상 측선수가 많은 원인을 파악해보기 위하여 측선수를 최대구간유량비 20% 이상일 때까지 측선수를 10%씩 감소하여 산정된 유량의 변화를 검토하였다. 유량 변화 검토 결과 현장에서 유량측정 시 측선수의 등유량 배치, 최대구간유량비(20%) 및 불확도(±10%) 기준을 준수하기 위해서 기준 이상의 측선수를 확보하는 경향으로 판단되었다. 이러한 문제를 해소하기 위하여 측선수 감소에 따른 유량 편차율 ±10%와 불확도 ±10% 조건을 만족하는 수면폭 구간별 최소 기준을 제시하였으며, 이 기준을 적용할 경우 전자파표면유속계로 현장에서 보다 신속하고 정확한 유량측정을 수행할 수 있을 것으로 기대된다.