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        • KCI등재

          스마트폰 카메라와 2차원 바코드를 이용한 실내 주차장 내 측위 방법

          송지현,이재성,Song, Jihyun,Lee, Jae-sung 한국정보통신학회 2016 한국정보통신학회논문지 Vol.20 No.1

          실내 측위 분야에서는 사용할 수 없는 GPS 의 한계를 극복하기 위해 대두되고 있는 기술들은 대부분 사설 무선 통신망(Private Wireless Network)를 이용한 방법이다. 그러나 이러한 방법들은 설치 및 유지 보수비용이 많이 들고 측위 오차가 수 미터로 실내 주차장 등 정밀한 측위가 필요한 장소에서 사용하기에 부적합하다. 본 논문에서는 QR 코드 인식 기반 차량용 실내 측위 방법을 제안하였다. QR 코드 스캔을 통해 절대 좌표를 얻고 아핀 변환(affine transform)을 통한 기울기(Tilt) 및 회전(Roll) 보정과 스케일 변환 및 삼각함수를 이용한 카메라의 위치 정보(상대좌표)를 획득하여 정밀한 위치 좌표를 계산한다. 결과적으로 13.79cm 의 평균 오차를 달성해 기존 무선 네트워크 기반 기술의 오차 50cm 대비 단지 27.6% 정도 오차율에 해당함을 확인하였다. GPS is not able to be used for indoor positioning and currently most of techniques emerging to overcome the limit of GPS utilize private wireless networks. However, these methods require high costs for installation and maintenance, and they are inappropriate to be used in the place where precise positioning is needed as in indoor parking lots. This paper proposes a vehicular indoor positioning method based on QR-code recognition. The method gets an absolute coordinate through QR-code scanning, and obtain the location (an relative coordinate) of a black-box camera using the tilt and roll angle correction through affine transformation, scale transformation, and trigonometric function. Using these information of an absolute coordinate and an relative one, the precise position of a car is estimated. As a result, average error of 13.79cm is achieved and it corresponds to just 27.6% error rate in contrast to 50cm error of the recent technique based on wireless networks.

        • 내장디자인 프리미엄 이미지 구현을 위한 연구

          송지현(Jihyun Song) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11

          As society’s concern for trend and perceived quality grows in global automobiles market due to its direct connection to user’s emotion and satisfaction, each automobile company has been aggressively researching and developing the premium value in interior of an automobile. However, the value of interior of an automobile is relatively undervalued than exterior of an automobile due to the production cost and technologies. Now the modern premium is becoming more emphasized in recent as a main characteristic of interior design of an automobile. The concept of premium is constantly redefined in accordance with social trend. The existing premium is conveying the meaning of luxury which is high level of technologies and high class interior material. However, the interior design for automobile, especially, has been increasing in its importance in marketability along with the social trend of “premium on automobile” and appearance of Y and N generation. The study purpose is to contribute to the development of embodiment of premium design by look into characteristic of interior and propose the design direction for the emphasis on premium design of compact and mid-sized automobile.

        • KCI등재

          중학생의 자기결정성동기가 체육수업몰입에 미치는 영향 : 온라인 체육수업을 중심으로

          송지현(Song Jihyun),최원석(Choi Wonseok),이혁기(Lee Hyuckgi) 학습자중심교과교육학회 2021 학습자중심교과교육연구 Vol.21 No.12

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          목적 본 연구는 온라인 체육수업을 경험한 중학생의 기본심리욕구가 체육수업몰입에 미치는 영향을 규명하고자 하였다. 방법 중학교 3학년 학생을 모집단으로 총 452명에게 설문조사를 실시하였고 자료분석에 부적합한 87부를 제외한 365부를 자료분석에 사용하였다. 자료분석은 SPSS Statistics 26.0을 활용하여 빈도분석, 탐색적 요인분석, 신뢰도분석, 다중회귀분석을 실시하였다. 결과 기본심리욕구 중 자율성은 체육수업몰입의 모든 하위요인에 긍정적인 영향을 미치고 있었다. 관계성은 수업내용에 대한 몰두 및 도전과 통제감 요인에, 유능성은 도전과 통제감 요인 및 자기목적적 경험에 통계적으로 유의한 결과가 나타났다. 결론 온라인 체육수업을 경험한 중학생들의 기본심리욕구가 어떻게 인지되는지에 따라 체육수업몰입에 관여되는지를 보여준다. 따라서 향후 온라인 체육수업에 있어 학습자의 몰입 정도를 높이기 위해서는 온라인 체육수업 환경에서 제공되는 프로그램에서 반영될 수 있는 자율성, 관계성, 유능성 욕구를 효과적으로 증진시키기 위한 다양한 교육학적, 교육공학적 접근이 요구된다. Objectives The current study examined relationships among basic psychological needs and flow of middle school students who have experienced online physical education(PE) classes. Methods In order to accomplish this study, a total of 452 questionnaires were distributed to 8th graders (male: 195, female: 170) in D city using the convenient sampling method. Among them, 87 questionnaires were excluded because they were incomplete. Data were analyzed using frequency analysis, exploratory factor analysis, reliability analysis, and multiple regression analysis using SPSS Statistics 26.0. Results Among the basic psychological needs, autonomy positively contributed to all the sub-factors of flow regarding PE participation. Relatedness had a significant impact on factors such as commitment to task and challenge and control. Competency had a significant impact on factors such as self-purpose experience and challenge and control. Conclusions The current study examined how middle school students are perceived to be involved in online PE classes. Because students basic psychological needs influence active engagement in online PE classes, appropriate pedagogical and technological approaches need to be considered to support the desire for autonomy, relatedness, and competence.

        • KCI등재

          비(非)상권 외식공간의 디자인 특성에 관한 사례 연구

          송지현(Song, Jihyun),이재영(Lee, Jaeyoung),이현수(Lee, Hyunsoo) 한국실내디자인학회 2018 한국실내디자인학회논문집 Vol.27 No.4

          The purpose of this study is to identify design elements for restaurant space in a non-commercial area and propose them for profit improvements of founders with small capital. As the barriers for market entry declines, new players in restaurant business has stiffen the competition and increased risk. So, it is crucial to reduce the investment costs for better risk management. In this paper, a non-commercial area is considered as an alternative location for a restaurant, and a survey is conducted to analyze the uniqueness and curiosity of the restaurants. Uniqueness and curiosity are worth studying as they are important factors of decision making. The survey was conducted on 121 individuals between 20’s and 40’s who are target customers of the restaurants. The survey measures the level of uniqueness and curiosity via images of the restaurant: how likely you will visit it, what are design elements that make it unique and curious. The results are as follows: Firstly, the respondents said positively about the degree of uniqueness and curiosity of the restaurants. The interior design elements are perceived to be more important than exterior design elements. Secondly, uniqueness and curiosity had a positive corelation with number of visits. Uniqueness in the interior space and curiosity in the exterior space have a higher influence on customers. Therefore, it is necessary to enhance effects by expressing curiosity on the exterior and uniqueness on the interior. Thirdly, the exterior shape of the restaurant is regarded as the most factor to induce the uniqueness and curiosity of the space. And the elements of spacial design related to shape such as layout, ceiling, sign are found to be more important than color. Therefore, it is necessary to actively utilize the formative factors to induce uniqueness and curiosity. The study can be a useful basic resource for the spacial marketing to supplement the disadvantages in a non-commercial area.

        • 대형승용차 충돌특성 및 변형양상에 관한 실험적 연구

          송지현(Jihyun Song),홍병창(Byeongchang Hong),김규현(Gyuhyun Kim),송진화(Jinhwa Song),서상욱(Sangwook Seo) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

          The purpose of this study is to conduct various crash tests of large passenger cars and measure the deformation, occupant injuries and body decelerations of vehicles. A relationship between impact speed and vehicle damage data such as deformation, body decelerations and etc are analyzed. The characteristics of domestic cars in crash tests are obtained and will be used for developing a precise accident reconstruction program by using a data which is recording at Automatic Accident Recording System(AARS). In this study, the test results of the full frontal barrier crash and side impact are reviewed and examined. The results show that the decelerations of large passenger cars are decreased on the increment of the vehicle weight. But duration of decelerations are increased on the increment of the vehicle weight.

        • 탑승자 보호성능을 위한 교량용 방호울타리에 관한 실험적 연구

          송지현(JiHyun Song),김규현(Gyuhyun Kim),최광호(KwangHo Choi) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

          Bridge rails are usually installed on the curb with a specified height and width. The variance of the height and the width of the curd could affect the safety for the passengers and the behavior of the vehicles. In this study, the impact severities of passengers and the behaviors of vehicles are investigated according to the variable location of the bridge rails on the curb with the specified height and width. The full scale crash test results show that the impact severities such as the THIV and the maximum PHD are minimized in the case of the correspondence of the face of bridge rails and the curb. Also, the results show that the behaviors of the vehicles are stable.

        • KCI등재

          ‘니하오마(你好吗)?’와 context 그리고 중국어 교육 - 중국어 영상콘텐츠의 대화를 중심으로

          송지현 ( Song Jihyun ) 한국중국언어학회 2019 중국언어연구 Vol.0 No.83

          Visual materials like movies and dramas contain efficient language resources to study Chinese. The main reason to use the visual materials is to enhance listening comprehension and speaking skill, enlarge vocabulary, and command vivid Chinese. Language learners are able to acquaint the knowledge of cultural context through watching media contents. Most of all, it could bring more interests in learning process. You can experience and learn various tone that fits the context of “Nihaoma?” through the dialogue in movies and dramas.

        • KCI우수등재

          플랫폼 독립적인 웹서비스를 이용한 그리드 네트워크 성능 관리 시스템에 대한 연구

          송지현(Jihyun Song),안성진(Seongjin Ahn),정진욱(Jinwook Chung) 한국산업응용수학회 2006 Journal of the Korean Society for Industrial and A Vol.10 No.2

          슈퍼 컴퓨터의 등장으로 기존에는 풀지 못했던 과학적, 학술적인 문제들이 대부분 해결되었지만 슈퍼 컴퓨터 자체의 막대한 비용 문제는 여전히 풀지 못한 숙제로 남아 있다. 이에 일반 사용자의 컴퓨터의 유휴 자원을 통합하여 협업하는 그리드 컴퓨팅이라는 개념이 등장하였다. 한편 분산되어 있는 이기종의 시스템의 자원을 통합하여 관리하기 위해서 연결 지향적인 프로토콜들이 사용되었지만, 다른 프로토콜끼리는 호환성이 없는 등의 문제가 존재한다. 본 논문에서는 플랫폼 독립적인 XML 기반의 SOAP을 사용하는 웹 서비스를 이용하여 그리드 네트워크의 성능 정보를 관리해주는 시스템을 제안한다. The advent of supercomputers contribute greatly in overcoming scientific and academic problems that were previously difficult to solve. However, the supercomputer itself suffers from the problem of being considerable cost. In response, the concept of grid computing, to use the resources of distribute computers connected with each other, was created. This system uses connection oriented protocols to integrate and manage the resources of different types of distributed systems, yet it has the problem of compatibility between protocols of other types. In this paper, a system to manage grid network performance through XML-based SOAP web service which is platform-independent, is proposed.

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