• 국제초고층학회논문집
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• 제11권2호
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• pp.125-135
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• 2022

While buildings in recent days become taller and larger, many problems occur during the management of construction. Particularly, as the vertical movement of manpower and materials during construction has become longer while the lifting frequency and load increase, the need for a good lifting management practice is also increasing. Therefore, this study presents a real-time lifting performance monitoring system that can store and manage lifting records for construction management. Through review of literature and preceding studies related to construction lift, the concept of lift planning and operation management was understood, leading to the development of a system to monitor lifting operation and performance information. This system enabled quick measurement of the lifting performance during construction phase while responding to changes in the project schedule. To verify this system, a case study was conducted in which the current status and characteristics of the sensing-based lifting performance were derived.

• 한국정보통신학회논문지
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• 제26권2호
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• pp.193-198
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• 2022

최근 코로나19를 예방하기 위해 마스크 착용 유무와 체온을 확인하는 곳이 많아졌다. 그러나 이러한 것은 사람이 수동으로 측정하거나 한 명씩 기계 앞에서 측정하는 방식이 대부분이므로 측정 방식에 따라 결과가 달라지고 인력 낭비가 발생한다. 또한 기계는 일반적으로 최고 온도만을 측정하므로 발열의 기준 또한 신뢰할 수 없다. 입구에 사람이 몰려 병목이 발생할 수 있으며 측정 장소는 대부분 입구 하나이므로 확진자의 동선 추적시에도 불편하다. 따라서 본 연구에서는 발열자와 마스크 미착용자를 카메라, 열화상 카메라, Haar Cascade 및 결괏값 선별 알고리즘을 활용하여 자동으로 분류하고 실시간으로 알려 전염병 확산을 억제하는 방법에 대해 제안하고자 한다.

• 동북아문화연구
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• 제19권
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• pp.23-48
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• 2009

Duan Fang's doctrine of constitutional monarchy went forward from monarchy to constitutional government based on that an establishment of constitution political structure is superior to a arbitrary rule political structure. And Duan Fang's doctrine featured limitation of monarch's authority protection of subjects' rights. He thought constitution government should be based on the establishment of constitution preparation. He believed that China need to take merit equally in the process of establishment of constitution preparation. In spite of this flexible recognition, there was not enough consideration about an ideological, social and economical basis that can make possible constitutional government operation. He had understood constitutional government system from angle of monarch's safety and the wealth and power of nation. The view was that a responsible Cabinet was for monarch's safety and the nation assembly judicature local autonomous is a system for safety of nation showed us. In his opinion, neither main task of congress is legislation, cabinet nor is the high ranking executive agency, however, he expected to constitutionalism system to become a buffing role instead of monarch. A little pure and simple thinking that open nation assembly and execute constitutional monarchy could make China powerful and wealthy might reflected urgent situation at that time.

• ETRI Journal
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• 제45권5호
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• pp.836-846
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• 2023

Mobile robots are used in modern life; however, object recognition is still insufficient to realize robot navigation in crowded environments. Mobile robots must rapidly and accurately recognize the movements and shapes of pedestrians to navigate safely in pedestrian-rich spaces. This study proposes real-time, accurate, three-dimensional (3D) multi-pedestrian detection and tracking using a 3D light detection and ranging (LiDAR) point cloud in crowded environments. The pedestrian detection quickly segments a sparse 3D point cloud into individual pedestrians using a lightweight convolutional autoencoder and connected-component algorithm. The multi-pedestrian tracking identifies the same pedestrians considering motion and appearance cues in continuing frames. In addition, it estimates pedestrians' dynamic movements with various patterns by adaptively mixing heterogeneous motion models. We evaluate the computational speed and accuracy of each module using the KITTI dataset. We demonstrate that our integrated system, which rapidly and accurately recognizes pedestrian movement and appearance using a sparse 3D LiDAR, is applicable for robot navigation in crowded spaces.

• 대한원격탐사학회지
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• 제40권2호
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• pp.167-177
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• 2024

With advancements in satellite technology, interest in target detection and identification is increasing quantitatively and qualitatively. Synthetic Aperture Radar(SAR) images, which can be acquired regardless of weather conditions, have been applied to various areas combined with machine learning based detection algorithms. However, conventional studies primarily focused on the detection of stationary targets. In this study, we proposed a method to identify moving targets using an algorithm that integrates sub-aperture SAR images and cosine similarity calculations. Utilizing a transformer-based deep learning target detection model, we extracted the bounding box of each target, designated the area as a region of interest (ROI), estimated the similarity between sub-aperture SAR images, and determined movement based on a predefined similarity threshold. Through the proposed algorithm, the quantitative evaluation of target identification capability enhanced its accuracy compared to when training with the targets with two different classes. It signified the effectiveness of our approach in maintaining accuracy while reliably discerning whether a target is in motion.

• 한국실내디자인학회논문집
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• 제22권6호
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• pp.108-118
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• 2013

This study has analyzed the process of space information perceived and recognized through the estimation of observation frequency and number according to the time range of observation data acquired from observation experiment with the object of hospital lobby. The followings are the results analyzed at this study. First, the continual observation of 3 and 6 times was attentive and conscious for probing to find an object rather than for acquiring exact information and that of 9 times could be regarded as the time for acquiring visual appreciation. However, the repetitive occurrence of high and low frequencies can be thought of repetitive acts for visual appreciation. Second, the continual observation of 3 and 6 times had the highest observation frequency of II, while that of 9 times had the highest observation frequency of III. In case of 3 and 6 times, the observation frequency had the tendency to become a little higher after being low since V, and in case of 9 times it had the repetition of becoming low and high and from IX it characteristically got higher. This feature can be thought to be the process that the subject repeats the fixation and movement of observation at a visual activity for perception and recognition. In the process of first observation, the observation frequency was the highest after 20 seconds or so, but since then, it gets lower and repeatedly gets higher and lower as time passes. After 90 seconds, the frequency showed the tendency of getting higher continuously. Third, the examination of changing features of frequency may show the characteristics of exploration for and attention to space but if the observation frequency is not associated with observation times for analysis there will a limitation that the features of observation frequency cannot be clarified. Accordingly, the simultaneous analysis of both is very effective for estimating the observation characteristics seen at the processes of perception and recognition. Fourth, the general analysis of the both revealed: with the progress of observation time the discontinuous space exploration decreased, and as the observation time got longer the fixed attention to a specific spot increased. Fifth, in order to estimate the observation characteristics by the change of time range the observation frequency and times by trend line was analyzed, which approach seems to be an appropriate technique that can comprehensively show the overall flow of time series data.

• 정보관리학회지
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• 제30권4호
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• pp.93-110
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• 2013

정보에 대한 접근을 증가시키는 기술의 사용은 지난 십 년 동안 대학도서관 서비스에 많은 변화를 가져왔다. 정보공유공간의 등장은 이러한 변화 중 하나이다. 이에 대한 대부분의 이전 연구는 이의 개념이나 역할에 치중하였다. 반면, 정보공유공간을 공간서비스로 파악하고 있는 본 연구의 목적은 정보공유공간이 이용자 유동패턴과 도서관인식에 어떤 영향을 미치는지 파악하는데 있다. 정보공유공간이 도서관의 주요 공간과 시설로 자리매김하였고 이에 따라 이들이 이용자의 행위와 인식에 어떤 영향을 미치는지 알아볼 필요가 있다. 본 연구는 두 가지의 연구방법을 사용하였다. 첫째, 관찰법을 사용하여 이용자들의 유동 패턴 및 행위를 관찰하였고, 둘째, 정보공유공간에 대한 이용과 인식에 관한 인터뷰를 20명의 학부학생과 12명의 대학원생을 대상으로 수행하였다. 본 연구의 결과로서 학부학생과 대학원생은 서로 차별화 되는 유동패턴을 보였고, 시설의 위치와 구조는 이용자들의 움직임과 행위에 영향을 미쳤으며, 또한 정보공유공간에 대한 인식은 도서관 전반에 대한 인식으로 해석되는 경향을 보였다. 본 연구결과는 이용자 요구를 고려한 도서관 공간 설계 및 향상에 도움이 될 것이다.

• 한국멀티미디어학회논문지
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• 제14권10호
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• pp.1348-1364
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• 2011

기존의 아동용 에듀테인먼트 콘텐츠는 교육에 사용되는 학습 교구 및 콘텐츠가 교육 대상자에 대하여 반응을 일방적으로 유도하는 수동적인 교육이 이루어져 능동적이고 자발적인 학 습이 가능하도록 하는 콘텐츠 개발 방법이 절실히 요구되고 있다. 이에 본 논문에서는 행위기반 에듀테인먼트 콘텐츠의 상호작용 교구로서 주사위 형태의 체감형 인터페이스 개발과 깊이 영상 정보 기반의 손동작 인식 기술을 활용한 아동용 에듀테인먼트 콘텐츠 개발 방법을 제안하였다. 또한 교수자가 전체적인 학습 코스웨어를 설정하고 관리 할 수 있는 학습 퀴즈 문제 저작 관리 도구 및 교육발달에 대한 실시간 모니터링용 학습 결과 로그 분석 시스템을 제안하였다. 본 연구에서 제안한 행위 기반 체감형 인터페이스 및 에듀테인먼트 콘텐츠는 조작이 간편하고 실체적 인터랙션을 제공하므로 서 흥미를 더해 능동적이고 자발적인 학습이 가능하다. 또한 학습퀴즈 콘텐츠 저작 관리 도구와 학습 결과 로그 분석 시스템은 아동에 대한 수준별 학습프로그램 구성이 가능하고 또한 아동들이 학습을 스스로 문제를 풀어가는 과정과 얻어진 결과를 바탕으로 이용자의 학습 발달 상황 및 행태를 파악하고 학습계획에 대한 평가 자료로 활용하므로 서 아동의 학습발달에 대한 실시간 모니터링이 가능할 것으로 예상된다.

• 한국보건간호학회지
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• 제17권2호
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• pp.238-254
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• 2003

The objective of this study was to provide baseline information useful for developing education programs to prevent sexual harassment in schools. Survey of recognition and experiences of sexual harassment and analysis of factors associated with sexual harassment were conducted. The data were collected using questionnaires from December 9 through 28, 2002. A total of 737 female teachers in Daegu participated in the survey. The data were analyzed with descriptive analysis, ANOVA, and T-test using SPSS /WIN 11.0. The study results were as follows: 1. As to the characteristics related to sexual harassment, $51.3\%$ of the female teachers had no experience of preventive education about sexual harassment, $37.2\%$ of the female teachers perceived that enactment of related laws had little influence on the prevalence of sexual harassment, and $59.8\%$ thought strict punishments are required. For teachers who have experienced sexual harassment in schools, $39.8\%$ thought that they must report to the counseling office or female teachers' meeting. On the other hand, $35.7\%$ answered that they would take passive actions such as talking to their friends or colleagues. 2. As to the mode of sexual harassment, participants regarded physical harassment $(4.06\pm0.78)$ as the prominent forms of sexual harassment, followed by visual harassment $(4.04\pm0.77)$, and verbal harassment $(3.86\pm0.81)$. Among physical harassment. 'touching a body part (shoulder, hip, hand, etc)(4.58) was recognized as prominent forms of physical harassment, while 'blocking one's path or impeding one's movement (3.48)' was recognized as least prominent forms of physical harassment. 3. As to the experiences of sexual harassment, $79.8\%$ of the female teachers had experienced sexual harassment. According to the characteristics of schools. public junior high school $(87.8\%)$, private high school $(83.4\%)$ and bisexual school $(82.5\%)$ had higher rates of sexual harassment. 4. As to the characteristics of experiences in sexual harassment. $65.3\%$ thought that sexual harassment was not serious, but $18.9\%$ thought it was serious and $2.2\%$ thought as very serious. 5. As to the characteristics of sexual harassers, $378.6\%$ were 'colleague teachers' and $8.6\%$ were 'principals and/or vice-principals'. Ninety-three percent of sexual harassers were , male' and $40.2\%$ of them were 'in their 40s'. In most cases. the offender of the sexual harassment was male teachers in the same schools. And more than half of the female teachers replied they had never had any education related to sexual harassment. which means that systematic education is quite urgent.

• 전자공학회논문지
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• 제52권3호
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• pp.181-189
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• 2015

동력의족은 하지 절단 환자나 다리근력이 부족한 사람들의 보행 보조를 위해 사용된다. 동력의족의 자연스러운 구동을 위해 선 보행단계가 잘 분류되어야 한다. 물리센서를 이용하여 보행단계를 분류하는 기존 연구는 동력의족이 사전에 훈련된 보행속도로만 재현되는 단점이 있다. 따라서 본 논문에서는 물리센서를 사용하지 않고, 근전도 신호만을 이용하여 오르막, 내리막 계단보행을 각각 4단계로 분류하는 방법을 제안한다. 근전도 신호를 RMS, VAR, MAV, SSC, ZC, WAMP 특징으로 산출하여 LDA(Linear Discriminant Analysis) 분류기를 통해 보행단계를 인식한다. 훈련 단계에서는 AHRS센서를 이용하여 무릎각도 변화에 따른 보행단계 범위를 생성한다. 실험 결과, 선행 연구의 경우 오르막 보행에서 평균 58.5%, 내리막 보행에서 35.3%의 정확도를 보인다. 반면, 제안하는 방법은 오르막 보행에서 평균 85.6%, 내리막 보행에서 69.5%의 인식률을 보인다. 또한, 본 연구를 통해 개별 근육 별 보행단계 평균 인식률을 분석하였다.