• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.12
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• pp.653-659
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• 2018

The accurate prediction of construction cost is a key factor in a project's success. However, it is hard to predict the construction costs in the planning stages rapidly and precisely when drawings, specifications, construction cost calculation statements are incomplete, among other factors. Accurate construction-cost prediction in the planning stage of a project is also important for project feasibility studies and successful completion. Therefore, various techniques have been applied to accurately predict construction costs at an early stage when project information is limited. There are many factors that affect the construction cost prediction. This paper presents a construction-cost prediction method as multiple regression model with seven construction factors as independent variables. The method was used to predict the construction cost of a local housing union project, and the error rate was 4.87%. It is not possible to compare the cost of the project at the planning stage of the local housing union project, but it has high prediction accuracy compared to the unit price of an existing unit area. It is likely to be applied in construction-cost calculation work and to contribute to the establishment of the budget for the local housing union project.

• The Journal of the Korea Contents Association
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• v.21 no.2
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• pp.1-14
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• 2021

Recently, crowdfunding platforms have received attention as one of the content investment platforms for the public. This research attempts to explore the influencing factors on the success of movie euqity crowdfunding project. We use 'number of texts', 'number of images', 'star influence power', 'IP-based movie project', 'movie production stage', 'box office prediction', 'investment capital ratio', 'amount of surplus available investment', 'profit calculation method' and 'minimum investment amount' as independent variables. And we examined how these factors affects the achievement rate of movie crowdfunding. As a result of multiple regression analysis, 'movie production stage', 'investment capital ratio', 'amount of surplus available investment' and 'profit calculation method' have a significant effect on the crowdfunding achievement rate. In addition, the results of this research can be used for reference when planning film crowdfunding projects.

• Journal of the Korea Society of Computer and Information
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• v.27 no.11
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• pp.131-138
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• 2022

Git's commit message is closely related to the project life cycle, and by this characteristic, it can greatly contribute to cost reduction and improvement of work efficiency by identifying risk factors and project status of project operation activities. Among these related fields, there are many studies that classify commit messages as types of software maintenance, and the maximum accuracy among the studies is 87%. In this paper, the purpose of using a solution using the commit classification model is to design and implement a complex classification model that combines several models to increase the accuracy of the previously published models and increase the reliability of the model. In this paper, a dataset was constructed by extracting automated labeling and source changes and trained using the DistillBERT model. As a result of verification, reliability was secured by obtaining an F1 score of 95%, which is 8% higher than the maximum of 87% reported in previous studies. Using the results of this study, it is expected that the reliability of the model will be increased and it will be possible to apply it to solutions such as software and project management.

• Information and Communications Magazine
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• v.27 no.10
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• pp.11-18
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• 2010

최근 네트워크 가상화 기술은 미래인터넷을 위한 다중의 네트워크 구조를 단일 인프라내에 수용하기 위한 솔루션으로 국내외로 많은 연구가 진행되고 있다. 본 고에서는 네트워크 가상화에 대한 정의 및 미래인터넷에서의 네트워크가 상화 기술의 필요성과 접근방식에 따른 국내외 연구 프로젝트들을 살펴보고, 실제 상용기술로 실현하기 위한 기술적 과제들을 분석한다. 또한 최근 관련기술을 표준화 하기 위한 ITU-T, ISO, IETF/IRTF, TTA 등의 연구동향을 기술한다.

• Information and Communications Magazine
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• v.15 no.2
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• pp.61-82
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• 1998

무선 ATM의 MAC 프로토콜은 독립적으로 분산되어 있는 이동 단말기들을 대상으로 ATM이 추구하는 진정한 의미의 통계적 다중화 기능을 무선 매체를 통해 확장하는 역할을 한다. 이와 같은 매체 접근 제어 프로토콜을 통해서만 멀티미디어 서비스 특성에 따라 동적으로 변하는 대역 요구 사항과 지연 시간 및 셀 손실 등의 서비스 품질을 동시에 만족시킬 수 있으며, 이동 단말기들이 채널을 공평하면서도 효율적으로 사용할 수 있는 접속 환경을 제공할 수 있다. 따라서, 이와 관련한 유럽의 ACTS 프로젝트 및 제외국에서의 기술 개발 사례와 ATM Forum WATM-WG에서의 표준화 동향을 분석하여 향후 무선 ATM 구현에 필요한 요소 기술로서의 매체 접근 제어 방식의 설계 및 구현 방안에 대해서 고찰함으로써 향후 연구 방향을 제시하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.1098-1099
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• 2023

다중객체 분석 모델 Yolo를 기반으로 물체를 감지하기 위해서 학습을 진행하고 학습을 통해서 얻어낸 모델을 기반으로 드론을 통해서 얻어낸 영상을 통해 컨테이너 파손이 된 부분을 감지하는 프로젝트를 진행했다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.01a
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• pp.1-4
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• 2023

운영체제(Operating System)는 사용자의 하드웨어, 시스템 자원(System Resources)을 제어하고 프로그램에 대한 일반적 서비스를 지원하는 시스템 소프트웨어(System Software)이다. 시스템 하드웨어를 관리할 뿐아니라 응용 소프트웨어를 실행하기 위하여 하드웨어 추상화 플랫폼과 공통 시스템 서비스를 제공한다. 최근에는 가상화 기술의 발전에 힘입어 실제 하드웨어가 아닌 가상 머신(HyperVisor) 위에서 실행되기도 한다. 본 연구에서는 다중 코어 프로세서를 타겟으로 한 소규모 운영체제 개발 프로젝트의 일환으로 부트로더를 설계하고 구현하였다. 부팅은 최초 컴퓨터에 전원이 들어온 후 운영체제가 실행할 수 있는 환경을 구축하는데 가장 중요한 역할을 하는 프로그램이며, 이를 잘 활용하면, 임베디드 시스템, IOT 등 다양한 분야에 이용할 수 있다.

• The Journal of Korean Association of Computer Education
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• v.14 no.6
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• pp.11-18
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• 2011

The purpose of this paper was to suggest multiple intelligence-based strategies in CL(Computational Literacy) education with scratch and to verify the effectiveness of it. First, we suggested multiple intelligence-based strategy for novice in programming education and apply it to CL education. Next, we conducted a field experiment to analyze the effectiveness of the educational strategy. 44 students participated in the experiment. Computational problem sloving test, multiple intelligence test, and survey were performed to analyze students' capability. Also, we tested students' programming capability through scratch project. The result shows that interest of programming and CL capability of students were different between treatment group and control group. It was found from the result that the strategy facilitate interest and motivation of students and contribute to effect of programming education.

• Journal of the Korean Association of Geographic Information Studies
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• v.27 no.3
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• pp.30-42
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• 2024

In this paper, we presented the processing process of the sea floor mapping system using multi-beam echo-sounding data through actual measurements and the results of processing the multi-beam echo-sounding data obtained by exploring some waters of Yeosu Bay. Simultaneously and continuously observe the location and water depth of the sea using GNSS and multi-beam echo sounder, synchronization of the two data, depth correction process considering the tide level at the time of observation, 3D model of the seafloor, contour map, and longitudinal and cross-section data of the seafloor topography. In addition, by extracting efficiently the dredging volume according to the dredging area and planned water depth required for dredging construction management of submarine projects, it can be used for maintenance and management of marine construction sites and ports.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.3 no.2 s.5
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• pp.9-17
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• 2004

In this paper, we examine the MIMO(Multiple Input Multiple Output) system in the point of mobile communication that is used for railway environment. First, under the radio environment, wireless channel characteristics are analyzed between moving train and base station, both assuming track side base stations and non-track side base stations. Next, the paper introduces the MIMO system which can be used to solve the problem of performance degradation in railway environment, and analyzes its performance in terms of channel capacity and diversity. We especially compares open-loop scheme with closed loop scheme at the diversity and analyses their performance according to antenna correlation. Finally, the we presents experimental result from the ESCORT project that was studied in railway environment with the MIMO system.