거리의존 해양환경에서 수동소나체계의 표적탐지거리예측

김태학,김재수 韓國海洋大學校 附設 海洋科學技術硏究所 1997 硏究論文集 Vol.6 No.-

원거리에서 수동소나에 의한 탐지거리를 예측하기 위해서는 소나방정식이 이용된다. 본 연구에서는 거리와 깊이함수의 신호이득 및 탐지확률을 구한 후 이를 거리로 적분하여 거리의존 해양환경에서 탐지거리를 계산하는 탐지거리 예측모델을 개발하였다. 개발된 모델은 기존에 발표된 거리독립 해양환경에서의 결과와 비교하여 검증하였고, 이를 바탕으로 거리의존 해양환경에서 수동소나에 의한 표적탐지에 큰 영향을 주는 나수성 소용돌이 해양환경에 확장 적용하여 표적의 탐지거리를 예측하였으며, 그 결과에 대하여 소개한다. The prediction of detection range of a passive sonar system is essential to estimate the performance and to optimize the operation of a developed sonar system. In this paper, a model for the prediction of detection range in a range-dependent ocean environment based on the sonar equation is developed and tested. The prediction model calculates the transmission loss using PE propagation model, signal excess, and the detection probability at each target depth and range. The detection probability is integrated to give the estimated detection range. In order to validate the developed model, two cases are considered. One is the case when the target depth is known. The other is the case when the target depth is unknown. The environment. Also, the developed model is applied to the range-dependent ocean environment where the warm eddy exists. The computational results are shown and discussed. The developed model can be used to find the optimal frequency of detection, as well as the optimal search depth for the given range-dependent ocean environment.

랫드에서 법제유황과 비법제유황의 독성비교

김근수, 정유리, 이남진, 홍성희, 유종훈, 정재황, 강종구 충북대학교 동물의학연구소 2006 Journal of Biomedical and Translational Research Vol.7 No.2

본문참고

우리나라 산업구조 분석과 발전방향

김재수 聖潔敎神學大學校 社會科學硏究所 1998 社會科學硏究 Vol.5 No.1

Abstract Korea has experienced remarkably rapid economic growth during the 1960s and 1970s. But Korea economy is recently experiencing serious difficulties in accomplishing its sustained growth in the future. The reason is that its International competitive power has been weakend, and the foreign debt has been increased by the poor competitive advantage. To accomplish the sustained growth in the future, First of all, the adjustment and reorganization of the industrial structure is needed most urgently in Korea.

豫備考査의 入試反映에 對한 調査硏究

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.

지방자치시대의 지방재정 구조와 운용방향에 관한 연구 : 군포시 재정을 중심으로

김재수 聖潔大學校 社會科學硏究所 1996 社會科學硏究 Vol.3 No.1

투명단열 축열벽 시스템을 적용한 주거용 건물의 냉난방에너지 성능분석

김병수,김재웅,윤종호 대한건축학회 2004 대한건축학회논문집 Vol.20 No.7

In previous study, Overheating/heating performance was carried out through Test-cell measurement used by TI-wall(Transparent Insulation) system and Mass-wall system and the optimum composition of TI-wall system was proposed by simulation analysis in the Korean weather condition. The aim of this study was to analysis the Heating/cooling performance following the optimum composition of TI-wall used in residential building. The process of this study is as follows:1) The ESP-r simulation program was used in energy performance analysis and the reference model of residential building was made up to analysis energy performance on Ti-wall and Mall-wall system. 2) Standard weather file of seoul, Taejon, pusan and Cheju was made that was the format of simulation program(ESP-r). 3) The regional Heating/cooling energy performance was carried pit by suing regional standard weather file of TI-wall and Mass-wall system in residential building and the reduction of Heating/cooling energy with the change of wall size of per system was analyzed. 4) The energy reduction of TI-wall system of foreign country was compared with that of Korean. Consequently, when TI-wall is equipped with South Surface of Residential Building, annual Heating Energy of Building was cut down at the average of 79.1kwh/m²(Seoul:101.7kwh/m², Taejon:59.8kwh/m², pusan:99.5kwh/m², cheju:79.5kwh/m²) or 18% of total heating energy, Cooling energy increased the average of 15.15kWh/m², in the case of using Solar Shading Device and Air ventilation system, the cooling energy is not only increased by Ti-wall at the lever of 97%, the basic cooling energy is but also cut down about 6%.

능동표적신호합성 알고리듬의 실시간 구현

김희성,김우식,최상문,한동훈,신기철,김재수 韓國海洋大學校 附設 海洋科學技術硏究所 1997 硏究論文集 Vol.6 No.-

The simulation of target-scattered echo with the moving sonar platform and target in 3-dimensional ocean environment is essential to validate and evaluate the performance of a sonar system. This paper presents the improved target signal simulation on the basis of the highlight(HL) model and its realtime algorithm. In order to simulate the scattering highlight, the highlight is represented as a directional scatterer. The realtime generation algorithm of the target signal is realized by use of DSP chip, TMS320C40, where the 40 channels are equally separated to form a parallel processing task in 4 processors. The presented realtime-version of target signal simulation can be used as a target signal simulator in the development of ACM(Acoustic Counter Measure) and advanced sonar signal processing techniques.

정보화사회와 미래의 과학 교육에 대한 고찰

박재호,김학수,이두희 부산대학교 사범대학 과학교육연구소 1996 科學敎育硏究報 Vol.23 No.-

We discuss the concept of imformation society and the middle school science education for the future information society. The discussions can be summarized as the followings ; 1. The information society can be realized by the renovation of informational techniques such as computer and electric communication. And the society will be heavily dependent on the various services, informations, and knowledges. 2. The educational curricula, educational method, and educational contents in the information society will be drastically different from today's and developed into the information-oriented ones.

남·북한 초등학교과정 과학교과서 비교분석 연구 : 물리영역중심으로

박재호,김학수,배옥경 부산대학교 사범대학 과학교육연구소 1996 科學敎育硏究報 Vol.23 No.-

Science textbook in South Korea(5th revised) and North Korea(current) are compared and analysed. The present study shows differences between both science textbooks which may be utilized in future after unification of the two countries. In primary education the south has more than the north in the page number of the textbook. In North Korean educational systems, the idolization of Kim Il-Sung and Kim Jung-Il is apparent. The textbooks of South Korea are made of better materials than those of North Korea. Covers, and illustrations are also of higher quality. Compositions are common in both country's textbooks as they deal with common everyday subjects. South Korean learns science uniformly. However, North Korean takes the unconnected, undeveloped, and ideological pass and also promotes the cramming as a system of education. In scientific terms, North Korea's textbooks show the differences in name, presentation.

산불지역과 비산불지역 계류의 저서성 대형 무척추동물 군집변동에 관한 연구

이종은,김재수 7개 국립대학교 환경연구 논문집 공동발행 위원회 2001 환경연구논문집 Vol.1 No.1

Community fluctuation of benthic macroinvertebrates from forest fire area and non forest fire area was investigated. Six studied sites were chosen and in the mountain stream (forest fire area = St.3, St.5, St.6 and non forest fire area = St.1, St.2, St.4) of Geonduk-myun, Samchuk-City. Quantitative and qualitative samplings and measurements of water quality were conducted in May, July, and September 2001. As a result, benthic macroinvertebrates collected from the surveyed sites were composed of 67 species, 34 families, 13 orders, 4 class, and 3 phyla. Among these phyla, aquatic insects in Arthropoda were 71 species, 37 famiilies, and 8 orders. And it occured at the fire forest area(mean species, 48; dominance, 0.57; diversity, 2.38), as compared with the non forest fire area (mean species, 45; dominance, 0.64; diversity, 2.39). The dominance indices(DI) showed the highest as 0.74 at site 4., and the lowest as 0.52 at site 1. The species diversity indices(H′) showed the highest as 3.01 at site 1., and the lowest as 1.93 at site 4.