• Journal of the Semiconductor & Display Technology
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• v.18 no.4
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• pp.57-61
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• 2019

Nowadays, portable digital cameras such as smart phone cameras are being popularly used for entertainment and visual information recording. Given a database of geo-tagged images, a visual location recognition system can determine the place depicted in a query photo. One of the most common visual location recognition approaches is the bag-of-words method where local image features are clustered into visual words. In this paper, we propose a new bag-of-words-based visual location recognition algorithm using time-series streetview database. The proposed algorithm selects only a small subset of image features which will be used in image retrieval process. By reducing the number of features to be used, the proposed algorithm can reduce the memory requirement of the image database and accelerate the retrieval process.

• Honam Mathematical Journal
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• v.41 no.1
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• pp.185-195
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• 2019

In this work, we study the conditions between null geodesic curves and timelike ruled surfaces in dual Lorentzian space. For this study, we establish a system of differential equations characterizing timelike ruled surfaces in dual Lorentzian space by using the invariant quantities of null geodesic curves on the given ruled surfaces. We obtain the solutions of these systems for special cases. Regarding to these special solutions, we give some results of the relations between null geodesic curves and timelike ruled surfaces in dual Lorentzian space.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.263-264
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• 2009

인터넷을 이용한 이러닝 시스템은 시간과 공간의 제약을 받지 않기 때문에 최근 교육 분야에서 각광 받고 있다. 그러나 교수자의 통제가 없기에 학습자들의 의지가 부족할 경우 불성실하게 학습에 임할 가능성이 농후하고, 면대면 수업에 비하여 교수자-학습자간의 상호작용이 어렵다는 점 등이 문제점으로 지적되고 있다. 이에 본 논문에서는 이러한 문제점을 완화시키고자 스키너의 강화이론을 적용하여 교수자-학습자간 상호작용을 증진시켜 학생들의 학습 몰입을 돕고, 궁극적으로 보다 효과적인 이러닝이 이루어 질 수 있는 학습시스템을 설계하고 구현했다.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.413-414
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• 2009

본 논문은 스크립팅 기반의 탐구학습을 위한 가상현실 저작용 시스템인 SASILE을 보완하여 프로그래밍 경험이 없는 일반 사용자들이 손쉽게 탐구 학습을 위한 교육용 가상현실 환경을 구현하고 활용할 수 있도록 개발한 드로잉 인터페이스 기반의 DEVISE(Drawing Environment for VR-based Inquiry-learning Science Education)에 대해 설명한다. 그리고 간단한 사용성 평가를 통해 DEVISE의 효용성에 대해서 논한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.05a
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• pp.2-3
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• 2022

본 논문에서는 환자들의 병력, 약물복용 내역 등 의료 데이터들을 저장하고 응급상황 발생시 이 정보들을 효율적으로 활용하는 구급활동 서비스를 설계한다. 설계된 구급용 의료정보 시스템은 구급데이터 클라우드, 전처리에 의한 사전 매핑 시스템, 구급대원들의 판단과 처치를 지원해주는 정보 제공 시스템 등으로 구성되어 있다. 매핑된 구급활동 리스트를 이용하여 구급대원들은 여러 검사와 조치를 병렬적으로 수행할 수 있어서 표준화된 구급활동의 효율을 높일 수 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.1437-1440
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• 2011

현재 학교수업에서 학습자간 학습 능력의 차이를 해결하기위해 개별 학습과 수준별 학습을 이용한다. 그러나 수업시간 중에 수준별, 개별학습을 진행하기에는 어려움이 따른다. 이에 해결방법으로 동료 지도학습 방법, 웹기반 개별지도 학습방법 등이 적용되고 있으나 이 또한 동료끼리의 열등감 문제, 즉각적 피드백 부족 등으로 많은 문제점들이 발생하고 있다. 따라서 본 연구에서는 효율적인 동료지도학습 방법을 적용하는 방법으로 SNS를 기반으로한 학습지원시스템을 제안한다. 본 시스템을 적용함으로써 기존의 동료지도학습 방법에서의 시.공간적인 제약 문제를 해결하였고, 개별학습과 수준별 학습이 가능하며, 자기주도적 학습이 효과적으로 이루어질 수 있다. 또한, 누구나 학습자와 교수자의 입장이 될 수 있으므로 동료끼리의 열등감 문제를 해결할 수 있다. 교수자로서의 역할 경험은 자아성취감을 고취시켜 학습의 흥미도를 높일 수 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.11a
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• pp.1173-1176
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• 2008

프로토콜 분석기는 어플리케이션 성능 관리나 트래픽 분석을 위해 인터넷의 각 계층별 프로토콜을 분석해주는 소프트웨어 툴로서 기업에서는 많이 쓰이고 있다. 그러나 대부분의 학교에서는 아직도 네트워크 강의가 교과서 중심의 이론 위주 교육으로 실시되고 있다. 본 논문에서는 각 계층별 프로토콜의 동작원리를 강의할 때 마다 온라인으로 프로토콜 분석기를 사용하여 스스로 실습을 통해 학습 효과를 높일 수 있도록 BL기반의 학습 시스템을 설계 하였다.

• Journal of Digital Contents Society
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• v.18 no.4
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• pp.795-802
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• 2017

If the function of the national infrastructure is suspended due to natural disasters and social disasters, the damage of the national infrastructure can be a serious threat to the national security as well as the life, body and property damage of the people. In this paper, we examine the domestic and overseas trends of the national system protection system and examine the domestic and overseas trends of the national system protection system. The detailed function of the essential function continuity, essential function, succession order, authority delegation, continuity facility, continuity communication, We examined the specific issues related to testing, education and training, transferring control and directing authority, analyzing the system related to the national infrastructure protection plan, and examined the specific problems and suggested an effective improvement plan for the critical infrastructure protection system.

• The Research Journal of the Costume Culture
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• v.28 no.5
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• pp.705-718
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• 2020

The goal of this study was to develop a haptic communication system that can convey the tactile sensation of fashion materials in a virtual environment. In addition, the effectiveness and how realistically the virtual fabric image of this system delivers the tactile sensation of actual fabric was verified. First, a literature review was conducted through which the tactile attributes of fashion materials were defined that would be implemented in the haptic communication system. Then, a questionnaire for evaluating the tactile attributes of fashion materials was developed. Next, a haptic communication system was designed to convey fashion image experiences in a virtual environment, from which a haptic rendering model was suggested. The effectiveness of the haptic communication system was evaluated by verifying user experiences with questions developed through a user evaluation experiment. The validity of the evaluation questions pertaining to the tactile attributes and the effects of the haptic communication system were verified. Factor analysis was conducted to verify the evaluation of the tactile sense attributes of the fashion material, which identified density, thickness, and elasticity of the material as key factors. As a result of comparisons between the tactile sense through haptic characteristics and through touching, it was observed that regarding density and thickness, tactile sense experience led to greater perceived reality, while this was not the case for elasticity.

• Journal of Digital Convergence
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• v.20 no.1
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• pp.129-139
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• 2022

This study aims to identify which factors affect successful big data system construction, identify the relationship between the factors, and identify the success model and success factors necessary for public institutions to build big data systems. Therefore, the preceding and related studies related to this study were reviewed, and success factors for the establishment of a big data system were derived based on this. As a research method, a survey was conducted on users of institutions that have established or planned to build a big data system, and a structural equation (AMOS) was conducted to verify the impact relationship between success factors. As a result of the analysis, organizational support factors, development support factors, user support factors, information quality, service quality, system quality, use, and net benefit were derived as success factors for building big data systems, and a success model was presented. This can be seen as significant and academic contributions in that it is the first study of the success model for building an information system reflecting big data characteristics, and it is expected that this study will be used as basic data for building a big data system in public institutions in the future.