• 제어로봇시스템학회논문지
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• 제21권2호
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• pp.87-94
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• 2015

This paper proposes a situation awareness method based on data fusion and independent objects for autonomous driving in on-road environment. The proposed method, designed to achieve an accurate analysis of driving situations in on-road environment, executes preprocessing tasks that include coordinate transformations, data filtering, and data fusion and independent object based situation assessment to evaluate the collision risks of driving situations and calculate a desired velocity. The method was implemented in an open-source robot operating system called ROS and tested on a closed road with other vehicles. It performed successfully in several scenarios similar to a real road environment.

• 한국과학교육학회지
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• 제35권1호
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• pp.109-119
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• 2015

본 연구는 개방적 상황에서 과학적 문제 만들기 활동을 통해 예비교사들의 과학적 문제발견능력이 어떻게 향상되는지를 보았다. 이를 위해 과학교육학부 1학년 세 반을 훈련에 참여한 정도를 기준으로 적극적으로 참여한 반을 실험집단 1로, 비적극적으로 참여한 반을 실험집단 2로, 참여하지 않은 집단을 통제집단으로 편성하였다. 문제 만들기 훈련을 위해 활동지를 제작하여 예비교사들에게 적용하였는데, 예비교사들은 7주간 한 주에 하나의 궁금증을 찾아 활동지를 작성하였고,연구자와 교수가 매주 피드백 해주었다. 또한 문제 만들기 훈련이 문제 발견능력에 주는 영향을 보기 위해 개방적 상황에서의 문제발견 검사지를 개발하여 훈련 전후 문제발견능력을 측정하였다. 훈련 간 문제 만들기 활동지의 지속적인 작성과 피드백을 통해 예비교사들이 발견하는 문제의 수준이 높아지고 다양해졌으며, 검사결과 발견한 문제의 양과 질에서 실험 집단 1이 다른 집단에 비해 유의미한 향상을 보였다. 특히 질적 검사 항목 중 독창성, 정교성, 검증 가능성, 변인의 유형에서 유의미한 차이를 보였다. 또한 실험 집단 2는 부정적인 결과를 보였는데, 이것으로 보아 훈련에 임하는 태도가 문제발견능력의 향상과 상관이 있다고 짐작할 수 있다. 전체적인 결과로 보아 지속적인 문제 만들기 훈련과 피드백은 예비교사들의 문제발견능력 향상에 도움이 된다고 할 수 있다.

• 교육시설
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• 제11권1호
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• pp.5-14
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• 2004

Since 1990s in Korea, elementary school classrooms have been designed toward open education system in pursuit of variety of educational purpose. Also, the architectural designs of schools have been acomplished for individual school not based on the standard design code. The present paper aims to investigate the acoustic environment of existing classrooms and to compare the sound insulation capacity between the ordinary classrooms and the newly built classrooms for open education. The current acoustical situation of elementary classrooms was analyzed using field measurements and questionnaire survey. In order to this, Three elementary schools were selected which were built in 1978, 1996 and 2000 respectively. Room acoustical parameters including Reverberation time(RT), Definition(D50), Speech Intelligibility(RASTI), Transmission loss(TL) and STC were measured in a classroom in each elementary school classroom. Each measurement was undertaken with the windows and doors being open or closed. As the result, it was found that the transmission loss between rooms in open classrooms is, $5{\sim}6dB$ in average, inferior than the ordinary classrooms. The RASTI of 0.70 was measured in newly built classrooms which is better than old classrooms(0.70) and open classrooms(0.73). This was shown as same in the speech definition measurements. This results from the condition of sealing and airtightness of classrooms and floor materials. The results denote that open classrooms have poor acoustic condition in sound insulation and speech intelligibility.

• 대한임베디드공학회논문지
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• 제9권1호
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• pp.11-16
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• 2014

When it comes to develop flight simulator, HAT (Height Above Terrain) is required to provide altitude information to the pilot who learns how to control an airplane in landing and takeoff situation. However, there might be inconsistent problem between real terrain and simulation information since current implementation of HAT simply depends on center of gravity point on the airplane. To overcome mentioned problem, in this paper, we propose how to obtain more accurate altitude information than existing scheme by making use of HAT and HOT (Height Of Terrain) information of landing equipments according to movement of the airplane. Moreover, we demonstrate the accuracy of the proposed scheme through new flight simulator developed through OSG(OpenSceneGraph) by taking example of terrain information for domestic airport.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제9권3호
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• pp.213-218
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• 2009

This paper describes a classical algorithm carrying out dynamic 3D obstacle recognition for autonomous underwater vehicles (AUVs), Support Vector Machines (SVMs). SVM is an efficient algorithm that was developed for recognizing 3D object in recent years. A recognition system is designed using Support Vector Machines for applying the capabilities on appearance-based 3D obstacle recognition. All of the test data are taken from OpenGL Simulation. The OpenGL which draws dynamic obstacles environment is used to carry out the experiment for the situation of three-dimension. In order to verify the performance of proposed SVMs, it compares with Back-Propagation algorithm through OpenGL simulation in view of the obstacle recognition accuracy and the time efficiency.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1993년도 Proceedings of International Conference for Agricultural Machinery and Process Engineering
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• pp.546-550
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• 1993

Three basic experiments in agricultural machinery management , strengthening the construction of socialized service system, facilitating the two-level management system in rural areas and carrying through the principle of " paid service ' are described and the main methods of strengthening agricultural machinery management are developed in this paper.aper.

• Journal of Information Science Theory and Practice
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• 제7권1호
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• pp.39-51
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• 2019

Open access is a paradigm whereby the electronic versions of scholarly publications are made freely accessible without any restrictions. It is actively promoted globally and is also promoted domestically in accordance with this global trend. However, there is a growing need to evaluate existing activities and to seek policies for the steady spread of open access. This study examines the necessity of switching to a national repository from existing institutional repositories through policy direction analysis of open repositories. We examined domestic open access policies by analysing various overseas cases and the situation in South Korea. Finally, we determined the validity of investment in a national repository by analysing its social and economic impacts using the modified Solow-Swan model. The main parameters for applying the modified Solow-Swan model were estimated, and the domestic research and development expenditure was predicted via a regression method. Then, we applied a range of rate of returns to research and development (10% to 50%) to various scenarios and examined the effects of increasing accessibility and efficiency by 1% to 10%. We found that the implementation of a national open access repository in South Korea would have a substantial impact (to the tune of 147 billion won), without considering the potential costs of such a repository. Based on the estimates of the social and economic impact of a national repository, the implementation of a national open access repository in South Korea is economically viable. Besides having beneficial social and economic impacts, a national repository is expected to enhance awareness of open access among Korean researchers and institutions.

• 한국IT서비스학회지
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• 제15권3호
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• pp.223-245
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• 2016

This study defines copyrighted public records in broad sense including open government data and public domain except for some private records. Additionally, this study aims to investigate improvement plan for maximizing utilization of copyrighted public records in web-sites using customer side, without consideration of supplier side. For this purpose, qualitative study method was used with grounded theory on analyzed problems from literature review and case study. Literature review was concentrated on definition of open data and abroad utilization indicators whereas case study analyzed current situation of four web-sites providing copyrighted public records. Converged opinions from in-depth interview and various statistical data was analyzed as a basis for grounded theory, then a paradigm model was constructed and future improvement plans were presented. The findings imply that opening of copyrighted public records is not just important for quantitative results, rather it requires qualitative improvement providing latest credible information that is consistent with the demand of the customer. Thus, development of service platform and business models for copyrighted public records are urgent task.

• 한국전자통신학회논문지
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• 제7권2호
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• pp.425-431
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• 2012

로봇의 실외 주행의 경우 실내 주행과 달리 실외 환경 전체에 대한 지도를 미리 작성할 수 없어 대부분 GPS를 이용하고 있으며 지도에 기반한 연구는 거의 없는 상황이다. 본 논문에서는 경사 구간이 없는 2차원 평면의 실외환경에서 정밀 GPS를 사용하여 GPS 데이터를 MCL 알고리즘에 적용하여 실외 로봇 위치 추정을 구현하고, 이를 적용하여 간단한 임무 시나리오를 수행하였다. 그리고 미들웨어 기반의 OpenRTM을 적용하여 관리자가 서버를 통해 원격으로 로봇을 제어하거나 상황을 관제할 수 있도록 하였다.

• 한국전자통신학회논문지
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• 제16권2호
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• pp.211-218
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• 2021

건설 현장은 다양한 위험요소가 존재하고 있다. 안전재해를 줄이고자하는 다양한 접근이 있으나 어느 정도 한계성을 가지고 있다. IT의 무선통신 기술과 빠르게 발전하고 있는 이미지 처리 기술을 활용하여 위험요소를 사전에 식별하고 능동적으로 대응한다면 건설 현장에서의 재해를 감소시킬 수 있을 것이다. 따라서 본 연구에서는 건설 현장의 위험요소를 사전에 발견할 수 있는 시스템을 구성하고 실시간 컴퓨터 비전을 목적으로 한 OpenCV를 이용하여 건축현장의 위험요소를 발견하고 대응할 수 있도록 하는 시스템을 제안하였다.