http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
소노부이 수중 진동 예측을 위한 동유체력 반영 집중소자 모델
박재호,임성훈,우성화,박노철,엄원석,임경원,신효섭,이삼화,박은철 한국소음진동공학회 2024 한국소음진동공학회 논문집 Vol.34 No.1
소노부이(sonobuoy)는 해수면을 부유하며 잠수함 소음을 탐지하는 음파 탐지용 부표이다. 해수면을 부유하는 부이에는 해면파에 의해 수직 방향의 진동이 발생하고, 이는 하부 음향센서의 수직 진동을 유발하여 전기 신호를 발생시킴에 따라 음향센서의 신호 대 잡음비(signal-to-noise ratio, SNR)를 저하시켜 음향센서의 탐지 성능을 저하시킨다. 음향센서의 진동을 저감하기 위한 최적 설계가 요구됨에 따라, 해면파에 의한 음향센서의 진동을 해석 및 예측할 수 있는 소노부이 수중 진동 모델 개발이 필수적이다. 본 연구에서는 해면파에 의한 음향센서 진동 예측을 위해, 동유체력 측정과 집중질량 모델로 이루어진 단방향 연계 모델(one-way coupling model)을 제시한다. 본 모델은 소노부이 각 구성 요소에 작용하는 동유체력을 실험적으로 측정하고, 이를 집중질량 모델의 입력값으로 사용하여 낮은 계산 비용과 높은 정확도로 음향센서의 수직 진동 주파수 응답을 예측한다. 본 모델을 이용하여 소노부이 음향센서의 주파수 응답을 예측하고, 소노부이 수중 진동 실험을 통해 모델의 물리적 정합성을 검증하였다. The sonobuoy is a portmanteau word for sound navigation, ranging and buoy. It is a device designed to float on the sea surface and detect noise radiated from submarines. The fundamental structure of a sonobuoy consists of a buoy, cable pack, drogue, and hydrophone. The buoy, floating on the sea surface, vibrates vertically owing to surface waves, causing vertical vibrations in the lower hydrophone connected by an elastic cable. The vibration of the hydrophone generates an electrical signal, which decreases its signal-to-noise ratio, thereby degrading its performance. An optimal design is required to minimize the vibration of the hydrophone; therefore, the development of a model for predicting the underwater vibration of a sonobuoy is essential. This paper presents a lumped-element model considering the hydrodynamic force for predicting hydrophone vibration caused by surface waves. The proposed model includes a hydrodynamic force and a lumped-element model. The hydrodynamic force acting on each component of the sonobuoy is derived from experiments, which are then input into the lumped-element model, allowing the accurate prediction of hydrophone vibrations with low computational costs. The vibration frequency response of the hydrophone is obtained using the model, and the model’s physical consistency is verified by underwater vibration experiments.
STS요소를 도입한 중학교 과학교육과정 개발 연구 : 물리 영역을 중심으로
박재호,김학수,박은미,백남권 釜山大學校 師範大學 1996 교사교육연구 Vol.33 No.-
The purpose of this study was to develop an STS curriculum and a sample of STS contents. The materials of daily affairs, social experiment and the interaction of Science-Technology-Society were considered. This study investigated the middle school students' science-related attitude and acknowledgement of STS education. The subjects were 191 students of middle school in Pusan. The results of this investigation can be summarized as following : 1. The science-related attitude investigation showed that many students weren't interested in the science classes, felt tiresome of new scientific introductions and didn't like the science-related works. 2. The acknowledgement-investigation of STS education showed that many students thought science should be related to technology and society, and desired daily affairs to be ralated to materials of the science class.
박재호 영남대학교 지역발전연구소 2003 영남지역발전연구 Vol.32 No.-
본 논문은 벤처기업조직 및 전통기업조직이 인적자원을 선발, 훈련/교육 그리고 승진 및 배치 등을 할 때 국제관행과 글로벌 스탠더드에 부합되는 과학화 방안을 제시한다. 이를 위해서 우선 컴피턴시 중심의 측정에 근거하는 인적자원 접근법을 다룬다. 이는 조직의 리더에게 어떤 리더십 스타일이 요망되는 가와 이를 측정 및 개발하는 구체적인 방법론인 감성역량도입 방안으로 제시된다. 감성역량은 4가지 영역 즉 자기이해, 자기감정 컨트롤, 타인이해 및 사회적 스킬 등으로 구성된다. 마지막으로 조직에서 인재의 선발, 개발 등과 같은 육성이란 측면 외에 점차 중요해지는 인재의 장기보유 즉 Retention방안 및 개인 및 조직의 경쟁력 강화와 직접적으로 관계되는 Executive Coaching에 대해서 체계적으로 다룬다.
儒敎思想이 傳統建築에 미친 影響에 관한 연구 : 朝鮮時代 宗家, 書院을 중심으로
朴載浩,李康宗,權秉俊 三陟大學校 産業科學技術硏究所 2002 産業科學技術硏究論文集 Vol.7 No.2
Root Confucian ideas to spread that principle that contribute all things in universe with human by perfect virtue the nature note and inside be that it be . Human's root had been shy gentle and good temper extremely but have stroma because keep body and because greed for material brings thereby, because it hides good temper or is forgotten, moral culture and education are required. Confucian Treatise of Human Nature gets into theoretical nature of this paradox in Sung Confucianism and by Toegye, Yulgok etc. philosophical by indurate . In Choson period, Sinbunje and formation of powerful family group's same race community form main family naturally and brought qualitative development of private house. Also, lecture-hall developed to place that development of Sung Confucianism learns learning and compose scholars' group. As this dying injunction bore in construction by direct admonition hundred Choson age that Confucian ideas develops.
朴載昊 釜山大學校 師範大學 1984 교사교육연구 Vol.8 No.-
This study attempts a masterly learning of mechanics unit in senior highschool physics 1. by individualizing the learning processes which are controlled by computer. A trial course ware of mechanics unit is presented and discussed.
박재호 三陟大學校 1996 論文集 Vol.29 No.2
Even in the best building there are always some elements which disturn our viewing pleasure. These are resulted from the lack of care before or after execution, incompetence to predict the effect of natural phenomenia. In this article I aimed to study the method to preserve and extend the life of beautiful buildings, by analyzing the cause of efflorescence developmenton the wall. I also aimed to consider a method to improve this ill-concition.
朴載昊,張赫杓,金鶴守 釜山大學校 師範大學 1976 교사교육연구 Vol.3 No.1
This study attempts to seek a way of adequate application of the national preliminary examination to the entrane examination of university. Data of examinations during four years(1973-1976)was collected and corelation between two was analysed. The results of this analysis are as follows; a)the corelation between two examinations is very high. and, thus, the following is strongly recommendable; 1.7 multiples of capacity of student entollments may be primarily selected by means of preliminary examinations and the necesary or instrumental subject for the higher education may be imposed on these chosen applicants. b)dropping precedure in each curriculum is desireble because without this applicants are liable to devote themselves only to their interesting curricula disregarding others not well achieved.