• 대한원격탐사학회지
• /
• 제27권4호
• /
• pp.495-506
• /
• 2011

천리안 위성의 궤도상 시험이 위성발사 직후인 2010년 7월부터 2011년 1월까지 약 7개월에 걸쳐 성공적으로 수행되었으며, 과학탑재체인 기상 및 해양탑재체 자료는 2011년 4월부터 공식적으로 배포되고 있다. 이 논문에서는 천리안위성의 궤도상 시험 중 핵심적인 요소인 탑재체 자료의 보정 과정 중 최종 단계인 기하보정의 궤도상 테스트 내용에 중점을 두고 있다. 천리안위성 기하보정 알고리즘의 구조와 내용을 간략하게 소개하였으며, 위성발사 후 행해진 기하보정시스템의 기능 및 검증 테스트의 단계별 과정들과 그 결과를 분석 정리하였다. 실시간 위성자료 전처리 시스템을 통해 확보한 자료들을 이용한 천리안 기하보정알고리즘의 최종 성능테스트는 요구 조건을 만족하는 우수한 정확도를 보여 주었다.

• 공학교육연구
• /
• 제17권4호
• /
• pp.43-47
• /
• 2014

The rapid development of science & technology and the globalization of society have accelerated the fractionation and specialization of academic disciplines. Accordingly, Korean colleges and universities are continually dropping antiquated courses to make room for new courses that better meet societal demands. With emphasis placed on providing students with a broader range of choices in terms of course selection, compulsory courses have given way to elective courses. On average, 4 year institutions of higher learning in Korea currently offer somewhere in the neighborhood of 1,000 different courses yearly. The classification of an ever growing list of courses offered and the practical use of such data would not be possible without the aid of computers. For example, if we were able to show the pre/post requisite relationship among various courses as well as the commonalities in substance among courses, such data generated regarding the interrelationship of different courses would undoubtedly greatly benefit the students, as well as the professors, during course registration. Furthermore, the GT system's relatively simple approach to course classification and coding will obviate the need for the development of a more complicated keyword based search engine, and hopefully contribute to the standardization of the course coding scheme in the future..Therefore, as a sample case project, this study will use GT to classify and code all courses offered at the College of Engineering of K University, thereby developing a system that will facilitate the scanning of relevant courses.

• 대한의용생체공학회:의공학회지
• /
• 제31권6호
• /
• pp.427-433
• /
• 2010

Although tracking methods are efficient and popular for vessel segmentation, they require a seed to initiate an instance of tracking. In this paper, a new method to detect new seeds for tracking of arterial segments from CT angiography (CTA) and to construct a vascular structure is proposed. The proposed algorithm is based on shape analysis of connected components in a volume of interest around a vessel segment which was already extracted by tracking. The eigenvalues of the covariance matrix are used as the shape features for detection. The experimental results on actual clinical data showed that the results totally revealed the arterial tree not hindered by bone or veins. In visual comparison to a method which combines registration and subtraction of both pre-contrast and post-contrast CT volumes, the proposed method produced comparable results to the reference method and were confirmed of its feasibility for clinical use of reducing the cost and burden of patients.

• 대한의용생체공학회:학술대회논문집
• /
• 대한의용생체공학회 1997년도 춘계학술대회
• /
• pp.313-315
• /
• 1997

We developed a new analysis technique for the assessment of irregular vibratory movement of vocal folds. Successive frames of pre-recorded video images from videostroboscopy were transferred to computer memory and a vibratory tract of one selected point was described as a waveform by displaying the same lines of all frames along the y-direction. By applying this technique, irregular vibratory patterns of multiple regions, such as asynchronized registration of glottal cycles, could be easily visualized. It would be possible to monitor and analyze the pathologic changes of vocal fold movement by means of this newly developed system.

• 보건행정학회지
• /
• 제8권2호
• /
• pp.88-109
• /
• 1998

The main purpose of this study is to compare the traditional cost system and ABC(Activity Based Cost) system of clinical laboratory department in a hospital. The study subject was 296 services in clinical laboratory from March, 1997 to August, 1997. In a new costing system, cost for a lab test consist of direct cost element, activity based cost element, and allocated common cost element. In a traditional cost system, cost elements included direct cost element and indirect cost allocated based on test volumes The major findings of this research were as follows. 1. In the application of ABC system, total cost was analyzed as follows. Direct cost was 39.3% of total cost. Activity cost and allocation were 20.9% and 39.8%, respectively. The results of analysis to use traditional cost system were as follows. Direct cost was 39.3% and it was as same as the result of direct cost of ABC system. Indirect cost was 60.7%. 2. Activities of clinical laboratory of subject hospital were registration, pre-test operation, test, test result handling, delivery, culture, post-test operation, technical support, management support, and educational support. 3. The differences of the case of higher number of test case being carried out, the cost of ABC system was lower than the cost of traditional cost system. Otherwise in the case of lower number of test case being carried out, the rests have not been appropriately evaluated, and effective management were needed in clinical laboratory.

• 한국측량학회지
• /
• 제35권2호
• /
• pp.91-102
• /
• 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.

• 융합보안논문지
• /
• 제18권4호
• /
• pp.35-43
• /
• 2018

현재 디지털 증거는 증거 채택에 있어 자유심증주의를 택하는 바, 채택의 기준이 명확하지 못하며, 분산처리 기법으로 디지털 증거의 분석시간을 단축시킬 수 있으나 암호기술의 발전 등으로 영장청구 제한시간인 48시간에 적합하지 못한다는데 문제점이 있다. 본 논문에서는 민/형사 소송절차에서의 증거능력과 증명력을 판례를 중심으로 분석하여, 자유심증주의를 대체할 객관적이고 세부적인 채택기준의 필요성에 대해 논하고자 한다. 또한, 포렌식 관점에서의 영장 청구 제한시간에 대한 문제점과 이에 대한 개선안으로 디지털 증거분석 사전신청제를 제시하고자 한다.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2021년도 춘계학술대회
• /
• pp.490-492
• /
• 2021

우리나라는 교통사고 안전 사회 실현을 위하여 범정부 종합대책을 2017년에 마련하였으며. 도심 지역의 제한속도를 기존 60km에서 50km로 낮추고 어린이보호구역의 경우에는 30km로 제한하는 등 차량이 저속으로 운행하게 하여 어린이 및 노인의 보행 중 사고를 최소화하기 위한 노력을 기울이고 있다. 본 연구에서는 매년 어린이 교통사고 사고율이 높아지고 있는 특정 지역인 단양군을 지정하여 자동차 등록현황, 교통사고 공간데이터(GIS) 현황으로 각 데이터를 전처리 후 데이터의 구조를 이해하고 데이터의 구조적 패턴을 알아내기 위한 분석 연구를 하였다.

• 한국컴퓨터정보학회논문지
• /
• 제21권12호
• /
• pp.11-18
• /
• 2016

Magnetic resonance image (MRI) is widely used in brain research field and medical image. Especially, non-invasive brain activation acquired image technique, which is functional magnetic resonance image (fMRI) is used in brain study. In this study, we investigate brain activation occurred by LED light stimulation. For investigate of brain activation in experimental small animal, we used high magnetic field 9.4T MRI. Experimental small animal is Balb/c mouse, method of fMRI is using echo planar image (EPI). EPI method spend more less time than any other MRI method. For this reason, however, EPI data has low contrast. Due to the low contrast, image pre-processing is very hard and inaccuracy. In this study, we planned the study protocol, which is called block design in fMRI research field. The block designed has 8 LED light stimulation session and 8 rest session. All block is consist of 6 EPI images and acquired 1 slice of EPI image is 16 second. During the light session, we occurred LED light stimulation for 1 minutes 36 seconds. During the rest session, we do not occurred light stimulation and remain the light off state for 1 minutes 36 seconds. This session repeat the all over the EPI scan time, so the total spend time of EPI scan has almost 26 minutes. After acquired EPI data, we performed the analysis of this image data. In this study, we analysis of EPI data using statistical parametric map (SPM) software and performed image pre-processing such as realignment, co-registration, normalization, smoothing of EPI data. The pre-processing of fMRI data have to segmented using this software. However this method has 3 different method which is Gaussian nonparametric, warped modulate, and tissue probability map. In this study we performed the this 3 different method and compared how they can change the result of fMRI analysis results. The result of this study show that LED light stimulation was activate superior colliculus region in mouse brain. And the most higher activated value of segmentation method was using tissue probability map. this study may help to improve brain activation study using EPI and SPM analysis.

• 재활치료과학
• /
• 제4권1호
• /
• pp.63-73
• /
• 2015

목적 : 본 연구는 감각방어를 가진 자폐 범주성 아동을 대상으로 감각식이 가정프로그램을 시행하여 감각조절과 사회적 능력에 미치는 영향을 알아본 연구이다. 연구방법 : 연구대상자는 감각방어를 가진 만 12세의 자폐 범주성 아동 1명이었다. 보호자 인터뷰와 평가를 통해 대상 아동에게 맞는 감각식이 가정프로그램을 만들었고, 보호자 교육을 통해 대상자의 가정에서 총 23일간 하루에 3번 30분씩 감각식이 가정프로그램이 진행되었다. 감각식이 가정프로그램 중재 전 후에 Adolescent/Adult Sensory Profile과 사회성숙도검사가 시행되었고 아동의 감각증상목록이 작성되었다. 결과 : 감각식이 가정프로그램 중재 후, Adolescent/Adult Sensory Profile검사의 Low Registration, Sensory Sensitivity, Sensation Avoiding영역이 정상범주에 속하게 되었으며, 사회성숙도검사 결과 사회연령과 사회지수가 향상되었다. 결론 : 감각식이 가정프로그램을 통해 아동의 감각방어가 완화되었으며 감각조절과 감정의 조절이 향상되었지만 한 명의 아동을 대상으로 한 연구이기 때문에 앞으로 더 많은 대상자들을 대상으로 한 연구가 이루어져야할 것이다.