• 한국측량학회지
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• 제4권2호
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• pp.27-41
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• 1986

본 연구에서는 LANDSAT- 5호의 TM과 MSS 데이타를 비교분석함으로서 TM 데이타의 활용방안에 대한 검토를 하고자 하였다. TM과 MSS 데이타의 비교는 인천지역의 토지이용분류 결과를 중심으로 이루어졌으며, 아울러 화상강조처리의 방법에 따른 정확도의 비교도 행하였다. 연구결과, 토지이용분류에 있어서 TM 데이타가 MSS보다 약 20%의 정확도 향상을 가져왔으며, TM 화상의 강조처리에서는 평활화처리가 효과적이었음을 알 수 있었다.

• 한국과학교육학회지
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• 제27권9호
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• pp.778-786
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• 2007

이 연구에서는 비유를 사용한 화학 개념 학습에서 대응 오류 분석 활동의 효과를 개념 이해도,대응 관계 이해도,수업에 대한 인식 측면에서 조사하였다. 2개 중학교의 1학년 121명을 비교 집단과 처치 집단으로 배치한 후,'물질의 상태와 분자 배열'에 대하여 수업을 실시하였다. 비교 집단에서는 TWA 모형에 기초한 비유 수업을 하였고,처치 집단에서는 TWA 모형의 '유사성 대응' 및 '차이점 지적'을 '대응 오류 분석 활동'으로 대체한 수업을 하였다. 연구 결과,학생들의 장의존성 장독립성에 관계없이 개념 이해도 검사와 대응 관계 이해도 검사에서 처치 집단의 점수가 비교 집단보다 높았으며,그 차이가 통계적으로 유의미하였다. 수업에 대한 인식 검사 결과에서는 대부분의 학생들이 비유를 사용하는 수업에 대해 긍정적으로 인식하였으나,처치 집단의 학생들은 대응 오류 분석 활동을 어려워하는 것으로 나타났다. 이에 대한 교육적 함의를 논의하였다.

• 한국과학교육학회지
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• 제29권8호
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• pp.898-909
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• 2009

이 연구에서는 화학 개념학습에서 역할놀이 비유가 대응 관계 이해도 및 대응 오류에 미치는 영향을 비유추론 능력에 따라 조사하였다. 중학교 1학년 학생 151명을 비교 집단과 '원 안에서 달리기' 역할놀이 비유를 사용한 처치 집단으로 배치하였다. 목표 개념인 '기체의 부피와 압력의 관계'에 대한 각 집단별 수업을 진행한 후, 바로 다음 차시에 대응 관계 이해도 검사를 실시하였고, 4주 후에 파지 검사를 실시하였다. 또한, 대표적인 대응 오류를 범한 학생들의 대응 과정을 조사하기 위해 면담을 실시하였다. 연구 결과, 역할 놀이 비유는 학생들의 비유 추론 능력에 관계없이 대응 관계 이해 및 대응 관계 이해 파지를 향상시키는 것으로 나타났다. 대응 오류에서도 역할놀이 비유를 사용한 처치 집단 학생들이 비교 집단 학생들보다 대응 오류의 빈도가 낮았다. 그러나 두 집단의 학생들 모두 유사한 대응 오류를 범하는 것으로 나타났고, 학생들의 비유 추론 능력에 따른 대응 오류 유형별 빈도 차이는 없었다. 이에 대한 교육학적 함의를 논의하였다.

• 한국측량학회지
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• 제35권2호
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• pp.91-102
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• 2017

Backpack-mounted mapping system is firstly introduced for flexible movement in indoor spaces where satellite-based localization is not available. With the achieved advances in miniaturization and weight reduction, use of LiDAR (Light Detection and Ranging) sensors in mobile platforms has been increasing, and indeed, they have provided high-precision information on indoor environments and their surroundings. Previous research on the development of backpack-mounted mapping systems, has concentrated mostly on the improvement of data processing methods or algorithms, whereas practical system components have been determined empirically. Thus, in the present study, a simulator for a LiDAR sensor (Velodyne VLP-16), was developed for comparison of the effects of diverse conditions on the backpack system and its operation. The simulated data was analyzed by visual inspection and comparison of the data sets' statistics, which differed according to the LiDAR arrangement and moving speed. Also, the data was used as input to a point-cloud registration algorithm, ICP (Iterative Closest Point), to validate its applicability as pre-analysis data. In fact, the results indicated centimeter-level accuracy, thus demonstrating the potentials of simulation data to be utilized as a tool for performance comparison of pointdata processing methods.

• 전자공학회논문지A
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• 제32A권8호
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• pp.71-77
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• 1995

Evaluated are errors of the conformal mapping method in the analysis of a coplanar waveguides and asmmetric coplanar strips. The errors are mainly due to the negligence of fringe field effect after electrode structures are transformed to parallel electrodes. For the purpose of comparison, results of the conformal mapping(CM) method are compared with those of the successive over relaxation(SOR) method.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 춘계학술대회
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• pp.71-73
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• 2013

본 논문에서는 GPS 코드를 이용한 시각 전달에 대해 소개하고 이 중 대류층 지연 계산에 적용되는 매핑 함수 중 Chao 매핑 함수와 Niell 매핑 함수를 적용한 결과를 비교 분석한다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.656-660
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• 2004

The Mobile Mapping System is an effective method to acquire the position and image data using vehicle equipped with the GPS (Global Positioning System), IMU (Inertial Measurement Unit), and CCD camera. It is used in various fields of road facility management, map update, and etc. In the general photogrammetry such as aerial photogrammetry, GCP (Ground Control Point)s are needed to compute the image exterior orientation elements (the position and attitude of camera). These points are measured by field survey at the time of data acquisition. But it costs much time and money. Moreover, it is not possible to make sufficient GCP as much as we want. However Mobile Mapping System is more efficient both in time and money because it can obtain the position and attitude of camera at the time of photographing. That is, Indirect Georeferencing must use GCP to compute the image exterior orientation elements, but on the other hand Direct Georeferencing can directly compute the image exterior orientation elements by GPS/INS. In this paper, we analyze about the positional accuracy comparison of ground point using the Direct Georeferencing and Indirect Georeferencing.

• The Journal of Korean Physical Therapy
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• 제27권3호
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• pp.135-139
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• 2015

Purpose: The aim of this study was to compare EEG topographical maps in patients with chronic stroke after action observation physical training. Methods: Ten subjects were recruited from a medical hospital. Participants observed the action of transferring a small block from one box to another for 6 sessions of 1 minute each, and then performed the observed action for 3 minutes, 6 times. An EEG-based brain mapping system with 32 scalp sites was used to determine cortical reorganization in the regions of interest (ROIs) during observation of movement. The EEG-based brain mapping was comparison in within-group before and after training. ROIs included the primary sensorimotor cortex, premotor cortex, superior parietal lobule, inferior parietal lobule, superior temporal lobe, and visual cortex. EEG data were analyzed with an average log ratio in order to control the variability of the absolute mu power. The mu power log ratio was in within-group comparison with paired t-tests. Results: Participants showed activation prior to the intervention in all of the cerebral cortex, whereas the inferior frontal gyrus, superior frontal gyrus, precentral gyrus, and inferior parietal cortex were selectively activated after the training. There were no differences in mu power between each session. Conclusion: These findings suggest that action observation physical training contributes to attaining brain reorganization and improving brain functionality, as part of rehabilitation and intervention programs.

• 한국초등과학교육학회지:초등과학교육
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• 제23권3호
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• pp.208-218
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• 2004

Many elementary school students have misconception related to dissolution and solution. Moreover, they usually fail to apply the results of the experiments in their science classes to their everyday life, and also have low science achievement. Therefore, they are not interested in science, and sometimes some of them are even afraid of it. The purposes of this study is to investigate the effects of concept mapping activity on science achievement and attitude. In addition, this study also aims at presenting the teaching and learning method of utilizing concept maps in order to have the students form correct concepts. The subjects were classified into two groups one group is composed of thirty-seven students (experimental group) who were participated in concept mapping activity, and the other is composed of thirty-eight students (comparison group) who were participated in the traditional teaching method. The major findings of this study are as follows: First, the concept mapping activity has a positive effect on improving students＇ science achievement. Second, the classes using concept maps have a good influence on forming students＇ science attitude. Third, the concept mapping activity is more effective in improving science achievement of mid and low level students. In conclusion, the loaming by concept mapping activity positively influence students＇ science achievement and attitude. Particularly for the students in mid and high levels, the effect is more remarkable.

• ETRI Journal
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• 제36권6호
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• pp.913-923
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• 2014

This paper proposes a global mapping algorithm for multiple robots from an omnidirectional-vision simultaneous localization and mapping (SLAM) approach based on an object extraction method using Lucas-Kanade optical flow motion detection and images obtained through fisheye lenses mounted on robots. The multi-robot mapping algorithm draws a global map by using map data obtained from all of the individual robots. Global mapping takes a long time to process because it exchanges map data from individual robots while searching all areas. An omnidirectional image sensor has many advantages for object detection and mapping because it can measure all information around a robot simultaneously. The process calculations of the correction algorithm are improved over existing methods by correcting only the object's feature points. The proposed algorithm has two steps: first, a local map is created based on an omnidirectional-vision SLAM approach for individual robots. Second, a global map is generated by merging individual maps from multiple robots. The reliability of the proposed mapping algorithm is verified through a comparison of maps based on the proposed algorithm and real maps.