• 대한한의학방제학회지
• /
• 제20권1호
• /
• pp.51-65
• /
• 2012

Objectives : In this study the antidepressant effects of mixture of Lycii Radicis Cortex and Gardeniae Fructus on the change of HPA-Axis and Catecholamine system was investigated Methods : The forced swimming test was performed. The expression of CRF, c-Fos in the PVN, and TH in the VTA and LC were measured with immunohistochemical method. And the experimental groups were divided into the Extraction after Mix group(A) and Mix after Extraction group(B). The effects of both group were compared. Results : The duration of immobility in the FST was decreased significantly in three groups except B100(P<0.01). B100 was shown the significant increase(P<0.05). The expression of CRF in PVN was decreased significantly in all group(P<0.05~P<0.01). The expression of c-Fos in PVN was decreased in A100, A400 and was increased significantly in B100, B400(P<0.05). The expression of TH in VTA and LC were decreased significantly in all group(P<0.001). Conclusions : Effects of Extraction after Mix group(A) and Mix after Extraction group(B) on the HPA-Axis system and Catecholamine system were validated.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2006년도 추계학술대회 논문집
• /
• pp.155-156
• /
• 2006

• Journal of the Optical Society of Korea
• /
• 제14권2호
• /
• pp.104-108
• /
• 2010

We proposed an axis transformation technique which reveals a distance parameter directly from optical scanning holography (OSH). After synthesis of a real-only spectrum hologram and power fringe adjusted filtering, we transform an original frequency axis to a new frequency axis using interpolation. In the new frequency axis, the filtered hologram has a single frequency which is linearly proportional to the distance parameter. Thus, the inverse Fourier transformation of the filtered hologram gives a delta function pair in the new spatial axis. Finally, we extract the distance parameter by detecting the location of the delta function pair.

• 한국멀티미디어학회:학술대회논문집
• /
• 한국멀티미디어학회 2001년도 추계학술발표논문집
• /
• pp.111-114
• /
• 2001

게이트 심근 SPECT 영상은 좌심실 구혈률(EF), 확장기말 부피(end-diastolic volume), 수축기말(end-systolic volume)부피 등의 지표로 심근의 기능을 평가하는데 널리 이용된다. 이러한 지표들을 구하기 위해서는 심근 안팎의 경계선을 추출해야 한다. 본 연구는 좌심실의 SPECT short-axis 영상에서 전처리 과정을 거친 영상을 Hough Transform을 이용하여 초기점 설정한 후 심실 내외벽의 경계선을 추출하기 위해 Williams 가 제안한 Active Contour Model(snakes)을 이용하여 심근의 경계선을 자동으로 추출하였다.

• 한국컴퓨터정보학회논문지
• /
• 제11권3호
• /
• pp.167-172
• /
• 2006

영상 검색 시스템이란 영상이 갖는 다양한 특징을 바탕으로 똑같거나 유사한 영상을 검색하여 제공하는 시스템이다. 본 논문에서는 영상의 컬러와 형태를 기반으로 한 상표 영상 검색 시스템을 제시한다. 영상을 영역별로 분할하고 영역별 컬러 분포 히스토그램을 추출하여 컬러 정보로 이용한다. 경계면 추출, 무게 중심 추출, angular 샘플링 등의 전처리 과정과 무게 중심으로부터 경계면 까지 거리의 합, 표준 편차, 장/단축 비율을 계산하여 형태정보로 이용한다. 이렇게 추출된 컬러와 형태 정보를 이용하여 유사성 측정을 통한 검색을 수행한다.

• 대한한의학방제학회지
• /
• 제19권1호
• /
• pp.161-174
• /
• 2011

Objectives : The effects of Extraction after Mixture of Bupleuri Radix and Lycii Radicis Cortex on the change of the HPA-Axis system and the Catecholamic system was investigated. Methods : After performing the Forced Swimming Test(FST), the expressions of corticotropin releasing factor(CRF), c-Fos in the paraventricular nucleus(PVN), and tyrosine hydroxylase(TH) in the ventral tegmental area(VTA) and locus coeruleus(LC) were measured by immunohistochemical method. Results : The duration of immobility in FST was significantly decreased in A 100(Extraction after Mixture of Bupleuri Radix and Lycii Radicis Cortex, 100mg/kg) and A 400(Extraction after Mixture of Bupleuri Radix and Lycii Radicis Cortex, 400mg/kg)(p<0.001). The expression of CRF in the PVN was shown the tendency to reduce in A100 and A400. The expression of c-Fos in the PVN was shown the tendency to reduce in A100 and A400. The expression of TH in the VTA was shown the tendency to reduce mildly in A100 and A400. The expression of TH in the LC was significantly reduced in A400(p<0.001). And the dose dependent reduction tendency was shown, respectively. Conclusions : According to the results above mentioned, the immobility, c-Fos and CRF expression was reduced at lower dose and was increased at higher dose. Therefore there is contradictory effects on the HPA Axis system in accordance with the dose. But in the effects on the catecholaminergic system, it significantly reduced the expression of TH in the LC. It was validated that the effect on the catecholaminergic system was ruled by Bupleuri Radix rather than Lycii Radicis Cortex via mainly the noradernergic system.

• 대한원격탐사학회지
• /
• 제9권2호
• /
• pp.7-19
• /
• 1993

In stereo vision, when we use two parallel axis images, small portion of object is contained and B/H(Base-line to Height) ratio is limited due to the size of object and depth information is inaccurate. To overcome these difficulities we take a non-parallel axis image which is rotated $\theta$ about y-axis and match other parallel-axis image. Epipolar lines of non-parallel axis image are not same as those of parallel-axis image and we can't match these two images directly. In this paper, we transform the non-parallel axis image geometrically with camera parameters, whose epipolar lines are alingned parallel. NCC(Normalized Cross Correlation) is used as match measure, area-based matching technique is used find correspondence and 9$\times$9 window size is used, which is chosen experimentally. Focal length which is necessary to get depth information of given object is calculated with least-squares method by CCD camera characteristics and lenz property. Finally, we select 30 test points from given object whose elevation is varied to 150 mm, calculate heights and know that height RMS error is 7.9 mm.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 1996년도 Proceedings of the Korea Automatic Control Conference, 11th (KACC); Pohang, Korea; 24-26 Oct. 1996
• /
• pp.137-140
• /
• 1996

Finding line segments in an intensity image has been one of the most fundamental issues in computer vision. In complex scenes, it is hard to detect the locations of point features. Line features are more robust in providing greater positional accuracy. In this paper we present a robust "line features extraction" algorithm which extracts line feature in a single pass without using any assumptions and constraints. Our algorithm consists of five steps: (1) edge scanning, (2) edge normalization, (3) line-blob extraction, (4) line-feature computation, and (5) line linking. By using edge scanning, the computational complexity due to too many edge pixels is drastically reduced. Edge normalization improves the local quantization error induced from the gradient space partitioning and minimizes perturbations on edge orientation. We also analyze the effects of edge processing, and the least squares-based method and the principal axis-based method on the computation of line orientation. We show its efficiency with some real images.al images.

• 전기학회논문지
• /
• 제56권3호
• /
• pp.519-523
• /
• 2007

In this paper, we propose a precise parameter extraction of interior permanent magnet (IPM) motors based on finite element analysis. For the calculation of the two-axis inductances Ld and Lq, the slotting effect and cross magnetization due to torque angle are considered. It is examined that back electro-motive force (BEMF) constant is affected by the magnetic saturation in different ways dependent on motor types. Numerical analyses and some measurements are performed for a spoke type and a flux barrier type IPM motors

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 1988년도 한국자동제어학술회의논문집(국내학술편); 한국전력공사연수원, 서울; 21-22 Oct. 1988
• /
• pp.697-700
• /
• 1988

This paper describes the design of a hardware system for ECG feature extraction based on pipeline processor consisting of three computers. ECG data is acquisited by 12 bit A/D converter with hardware QRS triggred detector. Four diagnostic parameters-heart, axis, and ST axis, and ST segment are used for the classification and the diagnosis of arrhythmia. The functions of the main CPU were distributed and processed with three microcomputers. Therefore the effective data process and the real time process using microcomputer can be obtained. The interconnection structure consisting of two common memory units is designed to decrease the delay time caused by data transfer between processors and designed by which the delay time can be taken 1% of one clock period.