농지보전을 위한 바람직한 국토이용체계 개편방향

성진근,강신우 충북대학교 농업과학기술연구소 2001 農業科學硏究 Vol.18 No.-

The newly reorganizing national land utilizing program, presented by government to prevent over-developing arable land, should be covered those principles as follows; Firstly, the existing agricultural promoting areas, which covered 53% of total arable land, should be expanded to the extend of guaranteeing national minimum food security. Secondly, the existing usages and regulations on land should be reorganized and discriminated not only by the criteria of location and physical suitabilites of cultivation, but also by the suitabilites of urban usagaes.

독ㆍ오 역사인류학의 탈근대적 모색 : '전파주의'에서 '민족사학(Ethnohistory)'으로 Speaking Countries

성시정 漢陽大學校 民族學硏究所 1993 民族과文化 Vol.1 No.-

慶州 高速鐵道 驛勢圈의 經濟性 分析

李時暎,金相鉉 동국대학교 지역개발대학원 1996 開發論叢 Vol.5 No.-

유과의 미주 현지인 기호도 조사

김상희,김윤호,박형우,차환수,이선아 한국식품저장유통학회 ( 구 한국농산물저장유통학회 ) 2004 한국식품저장유통학회지 Vol.11 No.1

본 연구는 우리나라 대표적인 전통식품중의 하나인 유과를 미국 현지인들에게 수출하고자 포장, 디자인 등을 개선하여 미국인 262명에게 2002년 8-9월 중 기호도 조사를 실시한 것으로써 조사대상자의 성별분포는 남자 45.8%, 여자 54.2%, 연령분포는 10대 41.6%, 20대 58.4%, 인종분포는 백인이 84.0%, 흑인은 8.8%, 히스페닉인은 7.1%이었다. 유과의 포장상태는 전체 응답자중 82.7%는 만족하였으며 포장디자인은 22.0%가 매우 만족하고 54.4%가 만족하는 것으로 나타났으며 인쇄는 69.8% 이상이 만족한 것으로 나타났다. 그러나 조직감은 48.5%로 만족정도가 다른 항목에 비해 낮았지만 맛과 함께 평가된 향미의 항목에서는 만족도가 60.9%로 상승하였음을 알 수 있었으며 유과에 대한 전반적인 기호도는 92.7%로 응답자 대부분의 기호에 적합하다고 답하였다. This study was to investigate the preference test of among 10's and 20's in New York, Atlanta, Chicago and Sanfrancisco in USA. Preference of packaging, design, printing, flavor, texture and overall preference was surveyed. About thirty percent of the respondents showed high score in packaging among the items. The design and color of Yukwa was 22.0% and 24.1% in “excellent”. Americans did not prefer the texture due to stickiness of Yukwa. However, 92.7% of the respondents showed high score in overall acceptability of Yukwa, On the basis of this result, Yukwa would be develope for residential people's preference. It is possible to export successfully the Korean traditional snack, Yukwa.

高等學校 地球科學에서 天文學 敎科內容의 組織化

李時雨,金相達 경북대학교 1978 논문집 Vol.10 No.-

The purpose of the present study is to analyse the content of astronomy in the earth science taught in high school, and to systematize it according to the sequence of basic physical concepts in order to raise the clear understanding of astronomical phenomena as a whole rather than in parts. The astronomical content was developed on the basis of observations as follows. 1) In the unit of the solar system, the celestial mechanics, solar physics and the origin of the solar system were dealt with using observational quantities, i.e., distance, velocity, mass, size, and periodic motion, etc. 2) In the unit of the stellar system, the physical evolution, dynamical motion, the Galaxy and the Galactic force field were dealt with using observational quantities,i.e., spectrum, distance, brightness, proper motion, mass, size,etc. 3) In the unit of galaxies and the universe, the formation and evolution of galaxies, the expansion of the universe and the origin of the universe were dealt with using observational quantities, i.e., spectrum, space motion, distribution of hydrogen gas, mass, size, luminosity, rotational velocity of galaxies, etc.

Dual Decision Feedback Equalizer를 위한 LMS 알고리즘과 변형된 Steepest Descent 알고리즘이 결합된 새로운 적응 등화 알고리즘

공현윤,서성호 울산대학교 2001 공학연구논문집 Vol.32 No.1

Decision Feedback Equalizer(DFE)는 심한 심볼간 간섭이 존재하는 채널을 보상하는데 있어서 선형 등화기 보다 잡음 성분의 증폭이 적으므로 현재도 통신 시스템 및 하드 디스크 드라이브와 같은 자기 기록 장치의 채널 등화에 사용된다. 또한 최근에 동일한 구조의 DFE 두 개를 병렬로 사용하고 적은 메모리를 사용하여 성능을 향상시킨 Dual Decision Feedback Equalizer(DDFE)가 제안되었다. DDFE는 shift register를 사용하여 등화성능을 향상시킨 반면 시간 지연으로 인하여 Least Mean Square(LMS) 알고리즘과 같은 적응 등화 알고리즘을 적용하는데 어려움이 있다. 따라서 본 논문에서는 일반적으로 시불변 채널을 보상하는데 사용되는 DDFE가 시변 채널에 있어서도 효과적인 등화를 할 수 있도록 DDFE에 알맞은 등화 기법을 제안하였다. 컴퓨터 시뮬레이션을 통하여 본 논문에서 제안한 적응 등화 알고리즘이 LMS 알고리즘을 적용한 DFE와 대등한 성능을 가짐을 확인하였다. The Decision Feedback Equalizer(DFE) is one of currently used equalizers in communication and magnetic recording systems such as hard-disk drive since it can compensate for channels with severe inter-symbol interference(ISI) without as much noise enhancement as the linear equalizer(LE). To improve the performance of DFE, Dual Decision Feedback Equalizer(DDFE), which is constructed by using parallel combination of two DFEs and its performance is superior to the DFE, was suggested. However, DDFE is a preset equalizer which is used in a known channel. It is very difficult to make DDFE system applicable to unknown channel environment occurred in wireless communications. Because DDFE has shift registers which cause time delay. To make DDFE system applicable to unknown channel environments, we suggest proper adaptive equalization technique for the DDFE in this paper. Through computer simulation, we show that the proposed adaptive equalization technique for the DDFE is comparable to the performance of conventional LMS algorithm for DFE which doesn't have time delay.

태풍 Vera 통과시 남해에서의 파랑추정

전기천,강시환,박광순,김상익 경남대학교 환경문제연구소 1990 환경연구 Vol.12 No.-

최근 한반도를 통과했던 태풍 중 그 규모가 커서 海上에서 발생된 颱風波浪에 의해 특히 남해안 지역에 큰 재해를 준 1986년 태풍 Vera(8613)호 통과시에 南海의 거문도와 거제도 海上에서 동시에 태풍파랑을 관측하였다. 관측된 태풍파랑의 재현을 위하여 유럽의 북해를 대상으로 최근 연구개발된 Hybrid Parametric Wave Model(HYPA)을 적용하여 Vera 통과시의 파랑분포를 수치적으로 계산하였으며, 그 계산결과를 관측치와 비교하였다. 또한 태풍파랑의 추정에 주로 사용되어온 Wilson모델의 결과와도 비교하여으며, HYPA모델의 결과가 Wilson모델에 비해 훨씬 관측된 파랑자료에 근접함을 보였다. 따라서 본 연구를 통해서 한반도 근해상에서 발생되는 태풍파랑의 예측과 추정에 있어 HYPA모델에 매우 정확함을 보여주었다. During the passage of Typhoon Vera(8613) which causes the heavy natural disasters, especially, on the southern coast of Korea, waves were simultaneously measured at two different locations of the South Sea, that is, near to the Geomun and the Geoje Islands. In order to reproduce the measured typhoen-waves, Hybrid Parameteric Wave Model(HYPA) which has been developed for the North Sea was adopted to calculate numerically the waves generated by the Typhoon Vera. The model results were jilter-compared with the measured waves, and also with the results of Wilson model which has been widely used for the hindcast of typhoon-waves. HYPA's results show in the closer ageement with the measured waves than those of Wilson's. Based on these comparisons, HYPA model can be used for more accurate forecast and hindcast of typhoon-waves in Korean Seas.

골다공증성 대퇴골 골절의 위험인자 평가

정선관,박성훈,김혜원,이영환,윤권하,최시성,노병석,원종진 圓光大學校 醫科學硏究所 2007 圓光醫科學 Vol.22 No.1

근 피판술을 이용한 기관흉막루의 치료

류한영,설정현,김정철,한승세,우상현,최시호 大韓成形外科學會 1991 Archives of Plastic Surgery Vol.18 No.2

Bronchopleural fistula and chronic empyema are the difficult problems in the thoracic surgery field. We experienced 3 cases of chronic empyema and complicated bronchopleural fistulas treated with muscle flap and concomitant thoracoplasty. The causative primary diseases were pulmonary tuberculosis and bronchiectasis. All the three cases have failed to control the chronic empyema and bronchopleural fistula with conventional method such as closed or open drainage and Eloesser flap after lobectomy. The unresponsive infection on bronchopleural fistula and pleural space was well controlled after muscle flap with thoracoplasty. Complete decortication, closure of bronchopleural fistula as much as possible and coverage of closed fistula with good vascularized tissue are the essential factors for the success of operation on chronic empyema and bronchopleural fistula. The results of operations were satisfactory and the respiratory function was well preserved or improved in one patient. But, the contour of chest wall was deformed in patient with extensive concomitant thoracoplasty.

간 허혈성괴상의 CT소견에 대한 실험적 연구 : 간실질 및 피막의 경시적 변화와 병리조직의 비교 Changes of CT Findings of Liver Parenchyama and Capsule with Time Lapse Correlated with Histopathology

김창근,김강득,최시성,정선관,노병석,원종진 圓光大學校 醫科學硏究所 1994 圓光醫科學 Vol.10 No.1-2

In order to evaluate CT findings with time and to confirm the capsular structure correlating with its histopathologic findings, we experimentally induced ischemic necrosis of liver in 20 rabbits. Incision of the abdomen was performed under anesthesia. Ligation of hepatic artery, portal vein and hepatic duct of right inferior posterior lobe of the liver after injection of macroaggregated albumin into right inferior posterior portal vein in order to prevent from developing collateral circulation as possible. Precontrast and postcontrast enhanced CT images were obtained at 1. 2. 4 days and 1, 2. 4. 6 weeks after induction of ischemic necrosis. Necrotic area in the liver showed homogeneous low density compared to normal liver, and no contrast enhancement after contrast material administration, and marked volume loss with time. CT attenuation value of necrotic area at 1 day(36.7±6.4 M±SD, Hounsfield unit) approached to two third of that of normal liver(56.3±7.3) and showed no significant change until two weeks but increased significantly after four weeks. On contrast enhanced CT images, capsular structure was obsereved as a high density rim along the liver surface of the necortic area in 8 of 15 cases. From the first day on, homogenous ischemic or coagulation necrosis was observed but rarely findings of edema, hemorrhage and cystic change were observed on histopathologic specimen. In all of the histologic samples taken from 10 cases during th 2nd to 6th week, fibrous thickening with rich vascularity was observed along the surface of the necrotic area. In conclusion, ischemic necrosis of the liver showed homogeneous low density and no contrast enhancement. CT attenuation value of necrotic area increased significantly with time associated with markedly decrease in volume. Capsular structure attributed to the hypertrophy of the liver capsule and rich vascularity within it.