• 한국항공운항학회지
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• 제20권4호
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• pp.14-20
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• 2012

A properly determined separation minima applied in Air Traffic Management(ATM) is critical for safe and efficient aircraft operations. The separation minima is primarily determined by the accuracy performance of surveillance system, and, due to the stringent aviation safety standard, the position accuracy of the surveillance system must be estimated with a high level of reliability. This study proposed a method for estimating the position accuracy of surveillance system with a relatively small amount of data by finding upper confidence limit instead of maximum likelihood values of unknown parameters. Through the proposed method, it is possible to determine a required separation minima with a more reliability in the face of data scarcity which often occurs when we implement a new surveillance system such as Automatic Dependent Surveillance-Broadcast (ADS-B).

• 대한조선학회지
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• 제15권4호
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• pp.20-23
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• 1978

This paper describes newly developed part generation program on the basis of ACUTE. New program named as ASEP(Automatic Separation Program) has function to separate a contour defined by ACUTE into several parts and store them in the part file. The separation flow is as follows, (1) Basic Contour Generation using ACUTE (2) Separation Line Definition (3) Separation into several parts (4) Storing parts in the part file with their individual name The merit of ASEP is to reduce the number of input cards and to simplify input statements.

• 대한의용생체공학회:의공학회지
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• 제17권3호
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• pp.319-326
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• 1996

Clinical myography(EMG) is a technique for diagnosing neuromuscular disorders by analyzing the electrical signal that can be records by needle electrode during a muscular contraction. The EMG signal arises from electrical discharges that accompany the generation of force by groups of muscular fiber, and the analysis of EMG signal provides symptoms that can distinguish disorder of mLecle from disor- ders of nerve. One of the methods for analysis of EMG signal is to separate the individual discharge-the motor unit action potentials(MVAPS) - from EMG signal. But we can only observe the EMG signal that is a superimposed version of time delayed MUAPS. To obtain the information about MUAP(, i.e., position, firing number, magnitude etc), first of all, a method that can separate each MUAP from the EMG signal must be developed Although the methods for MUAP separation have been proposed by many researcherl they have required heavy computational burden. In this paper, we proposed a new method that has less computational burden and performs more reliable separation of superimposed EMG signal using wavelet filter which has multiresolution analysis as major property. As a result, we develope the separation algorithm of superimposed EMG signal which has less computational burden than any other researchers and exacutes exact separation process. The performance of this method has been discussed in the automatic resolving procedure which is neccessary to identify every firing of every motor unit from the EMG pattern.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2009년도 춘계학술대회 논문집
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• pp.757-758
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• 2009

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2009년도 추계학술대회 논문집
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• pp.379-380
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• 2009

• 한국컴퓨터정보학회논문지
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• 제23권4호
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• pp.57-64
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• 2018

In this paper, we propose the automatic detection method for individual region separation using panorama image. Finding areas that contain individual teeth is one of the most important tasks in automating 3D models through individual tooth separation. In the conventional method, the maxillary and mandibular teeth regions are separated using a straight line or a specific CT slide, and the tooth regions are separated using a straight line in the vertical direction. In the conventional method, since the teeth are arranged in a curved shape, there is a problem that each tooth region is incorrectly detected in order to generate an accurate tooth region. This is a major obstacle to automating the creation of individual tooth models. In this study, we propose a method to find the correct tooth curve by using the jawbone curve which is very similar to the tooth curve in order to overcome the problem of finding the area containing the existing tooth. We have proposed a new method to accurately set individual tooth regions using the feature that individual teeth are arranged in a direction similar to the normal direction of the tooth alignment curve. In the proposed method, the maxillary and mandibular teeth can be more precisely separated than the conventional method, and the area including the individual teeth can be accurately set. Experiments using real dental CT images demonstrate the superiority of the proposed method.

• 한국화재소방학회논문지
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• 제27권5호
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• pp.38-43
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• 2013

보일러실이나 세탁소, 또는 음식점과 다중이용업소의 주방에 주로 설치하는 자동확산소화장치는 화재발생 시 화염이나 열에 의해 자동으로 약제가 방출되어 화재를 진압하는 소화기구 중 하나이다. 이 소화장치는 공칭방호면적에 해당하는 소화능력을 가지고 있으므로 방호대상물이 이 범위를 벗어나 있으면 유효한 화재진압이 보장되지 않지만 현행 기준에는 바닥면적에 따른 설치갯수만 요구하고 있다. 따라서 방호대상물과의 이격거리에 따라 소화성능은 달라지게 되며 이에 대한 특성을 고찰하고자 천장높이가 2.5 m인 모형화재실에 본 소화장치를 설치하고 A급, B급 모형가연물과의 수평이격거리에 따른 소화실험을 실시하였다. 실험결과 일반가연물과 유류가연물을 모두 확실하게 소화할 수 있는 최대수평이격거리는 약 30 cm인 것으로 나타났다.

• 한국기계가공학회지
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• 제2권4호
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• pp.61-66
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• 2003

An excellent mesh construction is of Importance in yielding good results of finite element analysis. The new mesh generation algorithm, which offsets boundaries inward, was developed on the basis of a looping method. An user interface technique and automatic splitting lines which both divide a given domain into subdomains manually or automatically, were used. In addition, the separation method has advantages to prevent the large scale of element size and to control numbers of nodes and elements. This new mesh generation algorithm was proved in practice.

• 전자공학회논문지B
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• 제31B권6호
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• pp.91-103
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• 1994

As CAD systems are introduced in the filed of engineering design, the necessities for automatic drawing input are increased . In this paper, we propose a method for realizing automatic drawing input by separation of text regions and graphic regions, extraction of line vectors from graphic regions, and recognition of circular arcs and circles from line vectors. Sizes of isolated regions, on a drawing are used for separating text regions and graphic regions. Thinning and maximum allowable error method are used to extract line vectors. And geometric structures of line vectors are analyzed to recognize circular arcs and circles. By processing text regions and graphic regions separately, 30~40% of vector information can be reduced. Recognition of circular arcs and circles can increase the utilization of automatic drawing input function.

• 한국산학기술학회논문지
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• 제10권2호
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• pp.256-263
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• 2009

한국철도공사에서는 기존선의 신호시스템을 지상의 ATS 시스템에 의한 신호 현시에 따라 운전자가 제한속도 이내로 열차를 운전하던 방식에서 지상의 발리스로부터 이동권한을 전송받아 차상신호시스템(ATP)에서 Speed Profile을 생성하여 운전하는 Bombardier Transport사의 ATP 시스템으로 개량하고 있다. 한국철도기술연구원에서는 기존선의 속도 향상을 위해 틸팅열차를 개발하여 10만 km 주행시험 중이며, 중앙선에 투입이 가시화되고 있다. 이러한 틸팅열차를 ATP 시스템에 의해 운전할 때 곡선구간에서 현재 제한되어지고 있는 곡선부 통과 속도를 증속하는 것이 쉽지 않은 형편이다. 따라서 향후 ATP 시스템의 국산화 개발이 이루어질 것을 대비하여 선행적으로 ATP 시스템의 핵심 기술인 선행열차에 따른 후행열차의 안전제동모델 및 열차간격제어 기술을 연구 개발할 필요성이 있다. 본 논문에서는 이를 위하여 발리스를 이용하는 ATP 시스템의 안전제동모델 및 열차간격제어 기술을 개발하고 그 성능을 시뮬레이션 하였다.