• Journal of applied mathematics & informatics
• /
• 제3권2호
• /
• pp.217-234
• /
• 1996

This report introduces a faster parallel LU decomposi-tion algorithm that gives a speedup almost equal to the number of nodes used. The new algorithm takes an advantage of an important C feature that lays out a matrix using a row major scheme and is based on the currently widely used LU decomposition algorithm with one major modification to eliminate most of the communication overhead. Empirical results are included in this report. For example solving a dense matrix that contains 100,000,000 elements gives a speedup of 50 when executed on 50 nodes of an intel Paragon in parallel.

• 한국자기공명학회논문지
• /
• 제3권2호
• /
• pp.84-89
• /
• 1999

The 87Rb quadrupole coupling constants (e2qQ/h) and the asymmetry parameters (η) in RbMnCl3 were determined from a nonlinear least-squares fit to the 87Rb NMR powder spectra. The spectra were acquired in the temperature range from 260K to 330K. An important feature in this work is the determination of the quadrupole coupling constants and the asymmetry parameters for two physically nonequivalent Rb sites, Rb(I) and Rb(II), as a function of temperature. In addition, a structural phase transition at room temperature was conformed with the changes in the quadrupole coupling constant and the asymmetry parameter of Rb(II) site.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
• /
• 제50권6호
• /
• pp.263-272
• /
• 2001

The paper presents the design of a segmented type synchronous reluctance motor(SynRM) to increase its torque and power factor. The main feature of a segmented type synchronous reluctance motor is the flux barrier. Thus, the design process to find optimum value of various geometric parameters including flux barrier will be explained. Optimum value of each parameter is found where the d, q inductance difference and saliency ratio are maximized because these inductance characteristics are related to torque and power factor. Finite Element Analysis will be used to simulate motor characteristics. Analysis results of redesigned SynRM show higher saliency ratio over 10 and improved value of maximum power factor.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 1999년도 춘계학술대회 논문집
• /
• pp.234-238
• /
• 1999

The correlation between shape of electrical trees and partial discharge(PD) pulses in low density polyethylene(LDPE) were discussed. We observed growth feature of electrical tree by using optical microscope. On the basis of experimental results of measurements of trees occurring in the needle-plane arrangement with needle shape void and without needle shape void , statistical quantities are derived, which are relevant to PD pulse amplitude and phase. The PD quantities detected by partial discharge detector. we were analyzed q-n distribution pattern and $\psi$ -q-n distribution pattern. In this experiment, electrical trees in the needle-plane arrangement with needle shape void propagated branch type tree and in the needle-plane arrangement without needle shape void propagated bush type tree

• 아동학회지
• /
• 제33권3호
• /
• pp.23-43
• /
• 2012

The purposes of this study were to verify the frequency of and causes and expression types of anger in children, which had been identified by means of a Q-tool and to investigate the relationship among the types of causes and expressions of anger, emotional intelligence, and social competence. The subjects of this study were 1,018 children aged between 8 to 10 years of age. MANCOVA and Logistic regression analysis were utilized. The major findings of this study were as follows : (1) a Q-Tool was developed through the selection of statements representing the feature of each type of anger, in terms of both-cause and expression. (2) Social competence revealed significant differences according to children's gender and emotional intelligence revealed significant differences according to children's gender and the types of anger causes, and (3) Emotional regulation out of subordinate variables of emotional intelligence, and interpersonal adjustment out of subordinate variables of social competence affected the types of expressions of anger in children.

• Archives of Plastic Surgery
• /
• 제41권5호
• /
• pp.472-479
• /
• 2014

Background Speech problems are a common clinical feature of the 22q11.2 deletion syndrome. The objectives of this study were to inventory the speech history and current self-reported speech rating of adolescents and young adults, and examine the possible variables influencing the current speech ratings, including cleft palate, surgery, speech and language therapy, intelligence quotient, and age at assessment. Methods In this cross-sectional cohort study, 50 adolescents and young adults with the 22q11.2 deletion syndrome (ages, 12-26 years, 67% female) filled out questionnaires. A neuropsychologist administered an age-appropriate intelligence quotient test. The demographics, histories, and intelligence of patients with normal speech (speech rating=1) were compared to those of patients with different speech (speech rating>1). Results Of the 50 patients, a minority (26%) had a cleft palate, nearly half (46%) underwent a pharyngoplasty, and all (100%) had speech and language therapy. Poorer speech ratings were correlated with more years of speech and language therapy (Spearman's correlation=0.418, P=0.004; 95% confidence interval, 0.145-0.632). Only 34% had normal speech ratings. The groups with normal and different speech were not significantly different with respect to the demographic variables; a history of cleft palate, surgery, or speech and language therapy; and the intelligence quotient. Conclusions All adolescents and young adults with the 22q11.2 deletion syndrome had undergone speech and language therapy, and nearly half of them underwent pharyngoplasty. Only 34% attained normal speech ratings. Those with poorer speech ratings had speech and language therapy for more years.

• 대한의용생체공학회:의공학회지
• /
• 제17권2호
• /
• pp.241-246
• /
• 1996

This paper describes a new system that detects radial pulse wave and allows the diagnosis of malfunctions of cardiovascular system by analyzing the waveforms with the newly proposed algorithm. The system consists of a sensor part and a data processing part within which a new detection algorithm is incorporated In acquiring radial pulse signal noninvasively, the sensor used in this system is a new combinational fiber-optic sensor which has a detecting Part and a transmitting Part. Also, In order to analyze the characteristics of pulsation quantitatively, the algorithm proposed in this paper is a method that runs in parallel with both the data of ECG and differential pulse simultaneously. these concepts are based upon the idea that thfee Q points of ECG give obious discrimination of one entire period of pulse in any abnormal cases, and newly defined feature lines at the differential counterpart can be used to recogrlize sDme significant points in one period of pulses.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1995년도 하계학술대회 논문집 C
• /
• pp.1271-1274
• /
• 1995

In this paper, design feature and operation characteristics of compact Ruby laser for plasma diagonostics are described. A linear Xe flashlamp and a single elliptical cavity are adopted as optical pumping system. With charging energy of 484J, the maximum output energy of 170mJ, laser pulse width $110{\mu}s$, and slope efficiency 0.09% were obtained. If Q-switch system is added to this laser, we suppose this laser will be quite enough for diagonizing plasma.

• 기술사
• /
• 제34권2호
• /
• pp.14-18
• /
• 2001

The primary cooling piping of HANARO is classified as safety class 3, seismic class 1 and quality class Q. This piping as safety related feature has been designed, manufactured and tested in accordance with ASME SEC. Ⅲ, DIV 1, Class 3. In October of 2000, the first step of the in-service inspection for this piping was carried out in accordance with ASME SEC. XI. This describes the results of the Inspection including the preparation of inservice inspection plan and inspection method. It is verified through the results that the safety related piping is maintained the mechanical and structural Integrities.

• Journal of Ecology and Environment
• /
• 제29권3호
• /
• pp.265-275
• /
• 2006

대구 인접지역 삼림식생에 대한 진행천이의 메카니즘과 잠재자연식생을 추정하였다. DCA 에 의한 요인 분석에서는 해발 고도 및 습도구배에 따라 각 군락의 특성이 결정되는 것으로 나타났으며, 토양의 수분 함량과 유기물 함량 및 전질 소량은 군락이 발달함에 따라 높아지는 것으로 나타났다. 종관 연관분석에서는 2개의 종집단으로 크게 구분되었으며, 이들 두 집단의 유형을 결정하는 요인은 기온 및 토양의 수분 요인으로 판단되었다. 특히, 두 종집단은 천이의 진행에 따라 종조성이 달라지는 군락의 발달단계를 보여주는 것으로 보이며, 생활형 조성도 이를 뒷받침하였다. 입지요인 및 종조성에 따라 소나무 군락, 굴참나무군락, 상수리나무군락 및 떡갈나무군락은 졸참나무군락이나 신갈나무군락으로 각각 천이가 진행될 것으로 예측되었다. 본 조사지역의 잠재자연식생은 종조성, 토양환경 및 지형요인에 의하여 산지 중 상부의 신갈나무군락, 계곡부의 고로쇠나무-까치박달군락, 산지 중 하부는 졸참나무군락 의 3개 유형으로 구분되었다. 그리고 신갈나무군락과 고로쇠나무-까치박탈군락은 현존 식생이면서 잠재자연식생이며, 소나무군락은 현재의 종조성 및 해발 영역을 토대로 신갈나무군락과 졸참나무군락으로 각각 발달할 것으로 예측되었다.