규칙적인 운동이 여성의 근력에 미치는 영향

박홍석,송채훈 朝鮮大學校 스포츠科學硏究所 2003 스포츠科學硏究 Vol.14 No.-

The purpose of this study was the regular exercise on investigate the characteristics of health related muscular strength in Women. The study were resulted as the following : Middle and high aged woman's health related fitness were gradually decrease by aging. And regular exercise group was fitness decrease slow compare to control group.

웨이블렛 변환을 이용한 능동 소음 제거기에 관한 연구

박재훈,이재균,이채욱 대구대학교 정보통신연구소 2006 情報通信硏究 Vol.4 No.1

음향모드 분할 현상을 피하는 음향공명기 동조방법에 대한 수치적 연구

박이선,손채훈 朝鮮大學校 機械技術硏究所 2004 機械技術硏究 Vol.7 No.2

음향불안정을 억제하는 수동제어기구 중 하나인 음향공명기의 mode split을 일어나지 않게 동조시키기 위해서는 고유주파수의 음향에너지 특성에 따른 정확한 동조가 필요하다. 여기서는 고유주파수를 응용해서 정확한 동조를 시킬 수 있는 방법을 소개하겠다. 음향공명기 모델로서 Helmholtz 형태의 공명기가 채택되었고, 진동해석을 통해 고유주파수를 구하였다. 유해 모드로 알려져 있는 제1종방향 음향모드와 제1접선방향 음향모드를 새로운 해석 방법에 의한 감죄를 통해 검증을 하였으며, peak의 좌우의 음향에너지가 균형을 이루게 함에 따라 mode split 된 peak이 1개의 peak으로 변화하는 과정을 나타내었다. 이를 토대로 mode split 없는 감쇠를 위해서는, 억제하고자 하는 음향모드의 peak을 중심으로 한 좌우의 음향에너지가 균형을 이룰 때 모드분할 현상이 나타나지 않으면서 그 음향모드를 감쇠시킬 수 있게 동조시킬 수 있음을 알 수 있었다. Acoustic behavior in gas turbine combustion chamber with acoustic cavity is numerically investigated by adopting linear acoustic analysis. Helmholtz-type resonator is employed as a cavity model to suppress acoustic instability passively. The tuning frequency of acoustic cavity is adjusted by varying the length of acoustic cavity. Through harmonic analysis, acoustic pressure responses of chamber to acoustic oscillating excitation are shown and the resonant acoustic modes are identified. Acoustic damping effect of acoustic cavity is quantified by damping factor. As the tuning frequency approaches the target frequency of the resonant mode to be suppressed, mode split from the original resonant mode to lower and upper modes appears and thereby damping effect is degraded significantly. A method to tune acoustic resonator preveting acoustic-mode split is suggested considery energy balance between left and of the peak response right sides.

Y Nd Ba₂Cu₃O 고온 초전도체의 구조와 적외선 투과율에 관한 연구

박기홍,김재욱,김의훈,김채옥 漢陽大學校 基礎科學硏究所 1992 基礎科學論文集 Vol.11 No.-

Y??NdxBa₂Cu₃O?? 고온초전도체의 X-선 회절 분석 과 적외선 투과율 측정은 실온에서 수행되었다. 또한 수송임계 전류밀도는 77K에서 측정되었고, 저항은 80~140K 범위의 온도에서 조사되었으며, 시료들은 고상 반응법에 의해서 제조되었다. 한편 x의 양이 변함에 따라서 전이온도 Tc는 88K 근처의 값을 가지며, 거의 x의 양에 따라 변하지 않았다. 적외선 투과율 측정에서 날카로운 peak들은 472.23~618.87㎝?범위에 있었다. 이것은 특이할 정도로의 low-lying plasmalike edge와 낮은 에너지의 전자적인 여기가 존재함을 나타내는 것이다. 수송임계 전류밀도는 22~92 A/㎠ 범위에 있었다. X-ray pellet diffraction and IR transmittance measurements were been carried out at room temperature. Also the transport critical current density and resistivity of high Tc superconducting Y??NdxBa₂Cu₃O?? system were determined at 77K and in the range of 80~140 K. The sample were prepared by solid state recation. As x varied, the superconducting transition temperature Tc near 88K did not depend on x. In the infrared transmittance measurements, several sharp peaks were observed in the range of 472.33~618.87㎝-1. This indicates that unusual low-lying plasmalike edge and low energy electronic excitation exist. The transport critical current densities determined ranged from 22 to 92A/㎠.

적정 예비 신호등 설치에 관한 연구

임채문,박관,권강훈,정만표 대구대학교 과학기술연구소 1998 科學技術硏究 Vol.5 No.4

In this study, the crosswalk at Hayaong-Yungchun arterial located in Kyungbuk province were chosen as the subject, and the reaction patterns of drivers were analyzed by the survey of the approach velocity of cars, know-reaction time and the geometric structure of crosswalk, and the substitute about the installation of pre-traffic signal at moderate distance for the prevention of the disturbing zone (dilemma zone, option zone) to drivers' pass-stop decision at the yellow-signal-situation was presented. The results are summarized as follows 1. The know-reaction time which is applied to the calculation of the yellow signal time is 1 second in korea generally, but the average time was 1.67 second and the standard variation was 0.38 second at 95 samples of the analyzing area. 2. The comparison between the calculation formula of the yellow signal time which is used in korea and the actual time has 1 second difference.

의료영상처리를 위한 고해상도 LCD 컨트롤러 개발

이채욱,황재석,박재훈 대구대학교 2005 대구대학교 학술논문집 Vol.1 No.1

In this paper we proposes the Implementation of Medical Image LCD Controller Using Multi-Image Equipment. Existent LCD is incongruent in resolution to use by medical. Therefore, proposed LCD is system that can do high definition display of suitable WUXGA (1900 * 1200) to medical. the existent LCD displays to detect TV signal or PC's signal, so developed LCD can detect PC's signal as well as TV signal. Five video signal is DVI, D-SUB, S-Video, Composite, Component and designed so that AUTO-SELECTION of five signal may be possible. This has advantage that detecting PC's signal as well as TV signal can make use of TV and monitor together doing unlike existent monitor. 본 논문에서는 의료영상처리를 위한 고해상도 LCD(Liquid Crystal Display) 컨트롤러의 구현 방법에 대하여 논한다. 기존의 LCD는 해상도 면에서 의료용으로 사용하기에는 부적합하다. 따라서 의료용에 적합한 WUXGA(1900 * 1200)의 고해상도 디스플레이를 해 줄 수 있는 고해상도 LCD를 개발하고자 한다. 또한 기존의 LCD는 TV신호 또는 PC신호만을 DETECTING해서 DISPLAY시켜주는 반면 본 LCD는 TV신호 뿐만 아니라 PC의 신호도 동시에 DECTECTING이 가능한 LCD 시스템이다. 5개의 영상신호는 PC신호인 DVI, D-SUB이며, TV 신호인 S-Video, Composite, Component이며 5개의 신호의 AUTO-SELECTION이 가능하도록 설계하였다. 이는 기존의 모니터와는 달리 TV신호 뿐만 아니라 PC의 신호도 DECTECTING함으로써 TV와 모니터를 같이 사용할 수 있는 장점을 가지고 있다.

액체 로켓엔진에서 선형 연소 안정한계에 미치는 유한화학반응 효과

손채훈,박이선,허환일 朝鮮大學校 機械技術硏究所 2005 機械技術硏究 Vol.8 No.1

로켓엔진에서 선형 연소 안정한계에 미치는 유한화학반응의 열적 효과를 조사하였다. 안정한계를 평가하기위해 3차원 연소실에서 유한화학반응을 채택한 반응 유동장 계산으로부터 구한 유통변수들을 사용하였다. 주요 유통변수들의 값은 유한화학반응 모델의 채택으로 인해 상당히 달라졌으며 결과적으로 안정한계도 수정되었다. 유한화학반응은 열적 관점에서 안정성 향상에 기여함을 알았다. In this study, thermal effect of finite-rate chemistry on stability are investigated. To evaluate stability limits, various flow variables from reactive flow fields are required. The flow variables are obtained from CFD analyses with finite-rate chemistry adopted in three dimensional chamber. When finite reaction is adopted, the establishment of reactive flow field is delayed. Accordingly. major flow variables are modified and the calculated stability limits are affected moderately by finite-rate chemistry. It is found that finite-rate chemistry contributes to stability enhancement in thermal point of view.

댄스스포츠 참여가 가족응집력 및 결혼만족에 미치는 영향

송채훈,박현서,박상규,정진영 朝鮮大學校 스포츠科學硏究所 2006 스포츠科學硏究 Vol.17 No.-

Couples are happy everybody and desire that their married life is successful beginning married life, but conjugal love itself does not become sufficient condition of happy double harness. In different environment each character have and is thought in life bow as well as way that love grown-up man and woman and feel and because difference exists that act. This research drew specimen using Stratified Cluster Random Sampling after establish population to woman who get married between gwangju Chollanamdo area's dance sports program newcomers February, 2006. form the analysis of the date the following conclusion were abtaind abtaind : First, among low rank factor of family cohesive power according to incidental and age that analyze family cohesive power and marriage satisfaction according to general special quality sentimentalize relation leading person and a friend Difference that keep in mind as statistical in factor during time appeared. Second, family cohesive power by dance sports participation existence and nonexistence and result family cohesive power that analyze marriage satisfaction 4 Hawibyeons be that of that it is a car that sentimentalize relation, family support keeps in mind appear. Third, result family cohesive power that analyze dance sports participation degree and family cohesive power and relation of marriage satisfaction was expose that it is corelation that keep in mind with participation period and participation strength and Chamgibindo. Fourth, family cohesive power and low rank factor of family cohesive power that express marriage savage tribe and the strongest corelation as result that analyze relation with marriage satisfaction appeared by family economy and are since next sentimentalize relation, family, was expose by order of Chingu·time. Also, marriage satisfaction's low rank factor which display family cohesive power and the highest corelation appeared and was expose by next order of marriage, communication, authoritative marriage that is affection enemy by adaptation about married life.

쌍정 경계가 고온 초전도체 Y₁Ba₂Cu₃O단결정의 자기적특성에 미치는 영향

이보화,박정수,김채옥,김의훈,정규채 漢陽大學校 自然科學硏究所 1997 自然科學論文集 Vol.16 No.-

일반적으로 쌍정 경계(twin boundary)는 고온초전도체Y₁Ba₂Cu₃O??? 단결정 내에서 핀 고정점(pinning center)로 작용하여 단결정 시료의 자화에 영향을 미칠 것으로 알려져 왔다. 그러나 이에 대한 체계적인 실험적 연구가 수행되지 않고 있다. 본 실험에서는 Y₁Ba₂Cu₃O??? 단결정 시료를 성장시킨 후, 재 후열처리 과정 중에 단축 가압 방법(uniaxial stress method)을 이용하여 단결정 시료를 detwinning 하였다. 편광효과가 관측된 micro-Raman spectra와 X-ray 회절 패턴으로부터 관측된 (001)면의 주 피크의 2Θ 값을 통해서 단결정이 잘 성장되었음을 확인하였다. 그리고, 반자성 차폐 효과, 마이스너 효과 및 자기이력 측정 결과로부터 detwinning시간이 길어져서 쌍정 경계의 비율이 감소할수록 자화폭이 감소함을 관측하였다. 이로부터 자속 고정(flux pinning)이 줄어듦을 알 수 있었다. 그러므로 쌍정 경계가 고온초전도체 Y₁Ba₂Cu₃O??? 단결정의 핀 고정점으로 작용한다는 것을 알 수 있었다. Generally it is suggested that twin boundaries play the major role of the pinning center in high-Tc superconductor Y₁Ba₂Cu₃???? single crystal and influences the magnetization. However, any systematic experiment related with this expectation has not been performed yet. In this experiment, after growing Y₁Ba₂Cu₃??? single crystals, we detwinned them in oxygen atmosphere using uniaxial stress method while annealing them again. It was verified that single crystals had been grown well from micro-Raman spectra that showed the polarization effect and 2Θ values of (001) plain peaks in X-ray diffraction pattern. We observed that values of magnetization of samples decreased from antimagnetic shield effects, Meissner effect and magnetic hysteresis as detwinning time was increased and this result means that flux pinning decreases. As a result we confirmed that twin boundaries act as a pinning center in high-Tc superconductor Y₁Ba₂Cu₃??? single crystal.

상업스포츠센터 재 소비 의향 및 구전커뮤니케이션 효과

노형철,송채훈,박형대,노재성 朝鮮大學校 스포츠科學硏究所 2003 스포츠科學硏究 Vol.14 No.-

All estimation about agineungjeok image and symbolic Imijia which is of commerce sports center image Hawibyeon is anateuma level, and intention about a ashes consumption and all appeared by anateuma level. And in service quality assessment connected with program withering member bicarbonate of soda and contrast for member affirmative .Therefore, service quality, service value, estimation level about image and ashes consumption intention that commerce sports center consumer is recognizing, word of mouth communication intention is contradictory more or less and also, bicarbonate of soda member in service quality assessment which service quality estimation connected with main equipment and employee is affirmative, and is involved with subsidiary facilities than another thing education level group bicarbonate of soda and withering member contrast for member affirmative . And estimation about symbolic image is affirmative, ashes consumption intention level is high. Exercise participation degree and service quality Hawibyeonin that other commerce sports center consumption experience Hawibyeon is do not influence in ashes consumption intention and word of mouth communication factor.