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병재배 폐톱밥을 이용한 양송이 복토재료 개발에 관한 연구
김홍규,이희덕,김용균,한규홍,문창식,김홍기 충남대학교 생물공학연구소 1999 생물공학연구지 Vol.7 No.-
애느타리 병재배후 탈병한 톱밥을 3월 중순 퇴적하여 부숙시킨 결과 퇴적기간에 따른 폐톱밥의 부숙정도는 퇴적 30일이후에 가장 컸으며 부숙 소요일수는 최소 48일이었다. 퇴적 기간에 따른 폐톱밥의 pH 및 총 질소 함량은 부숙이 진전됨에 따라 증가하는 경향이었고 총 탄소 및 C/N율은 시간이 경과함에 따라 감소하는 경향이었다. 식양토에 부숙이 완료된 톱밥을 부피 비율로 10, 30, 50%씩 첨가하여 복토 재료로 사용한 결과 30% 첨가시 식양토 단용 처리보다 A. bisporus 균사 생장이 촉진되고 초발이 소요일수가 5일 빠르며, 수량에 있어서도 28% 증수되었다. After bottle culture of Pleurotus ostreatus, sawdust was taken out from the bottle and accumulated in the middle of March, and then composted. As the result, Y value was decreased rapidly 30 days after composting, and it was decreased slowly after 30 days. It is considered that 118 days is required for composting, however, it is possible to use for casing material after at least 48 days composting. The pH and total nitrogen content of sawdust based on composting period had tendency to increase as composting was processed. Total carbon and C/N rate had tendency to decrease as time went on. Based on the rate of 10, 30 and 50%, each sawdust was added to clay loam used as casing material for culturing A. bisporrus. Among various treatments, the mycelial growth of A. bisporus was more favorable in the treatment of 30% sawdust than in the single treatment of clay loam. Based on the date necessary for primodium formation of A. bisporus, the primodium formation in the treatment of 30% sawdust was reduced to about 5 days as compared with that of any other treatments When 30% sawdust was added to clay loam used as casing material for culturing A. bisporus, the yield of its fruiting body was increased to 28%.
SUS 304 마이크로 와이어 직선화 처리에 관한 연구
신홍규,김남수,김웅겸,홍남표,김병희,김헌영 江原大學校 産業技術硏究所 2004 産業技術硏究 Vol.24 No.A
In the study, we have developed a straightening system for the SUS 304 micro wires that are normally used in the medical and semi-conductor fields. To apply heat to the micro wires, we introduced the direct wire heating method which generates the thermal energy by the electrical resistance of the wire itself. To avoid the deterioration of the wire surface by the environment, such as the oxidation or the hydration, the N_(2) gas was filled in the glass pipe in which the straightening process was being performed. A precision tension meter was also attached to control the tension of the wire during the heating and straightening process. In order to control the straightening process, several experimental investigations with varying the tension, the feeding velocity and the temperature (current) was carried out. As a result of experiments, we obtained the optimal processing conditions satisfying the straightness requirement of the micro wires.
Cone beam형 전산화단층영상에서 골의 형태와 밀도의 평가
홍상우,김규태,최용석,황의환 대한구강악안면방사선학회 2008 Imaging Science in Dentistry Vol.38 No.1
Purpose : Diagnostic estimation of destruction and formation of bone has the typical limit according to capacity of x-ray generator and image detector. So the aim of this study was to find out how much it can reproduce the shape and the density of bone in the case of using recently developed dental type of cone beam computed tomography, and which image is applied by new detector and mathematic calculation. Materials and Methods : Cone beam computed tomography (PSR 9000N, Asahi Roentgen Ind. Co., Ltd., Japan) and soft x-ray radiography were executed on dry mandible that was already decalcified during 5 hours, 10 hours, 15 hours, 20 hours, and 25 hours. Estimating and comparing of those came to the following results. Results : The change of inferior border of mandible and anterior border of ramus in the region of cortical bone was observed between first 5 and 10 hours of decalcification. The reproduction of shape and density in the region of cortical bone and cancellous bone can be hardly observed at cone beam computed tomography compared with soft x-ray radiography. The difference of decrease of bone density according to hours of decalcification increase wasn’t reproduced at cone beam computed tomography compared with soft x-ray radiography. Conclusion : CBCT images revealed higher spatial resolution. However, contrast resolution in region of low contrast sensitivity is the inferiority of images’ property.
김규창,홍성헌 대구효성카돌릭대학교사회과학연구소 1999 사회과학논총 Vol.1 No.-
The purpose on analysis and estimation of political risk in the international business activities, can be summarized as to make a better framework for appreciating the relationship between political environment and sources of political risk. Foreign investment enterprises recognize increasingly the importance of political risk elements in many foreign investment and operating decisions. For political risk analysis in this study two methods are introduced, one is Scenario framing method and the other is political map method. Generally, the most important thing in the political risk estimation is not to choose how to estimate but to understand widely investment environment of the concerned countries to estimate.
뉴로 컴퓨팅 시스템 시뮬레이션 언어 개발 및 응용환경의 구축
홍규완,김정수,이수동 울산대학교 1995 공학연구논문집 Vol.26 No.1
대부분의 신경망 시뮬레이션 프로그램은 기존의 언어(C,PASCAL,FORTRAN등)로 구현되었다. 기존의 언어들은 신경망구조와 신경망의 동적행위를 제어하는 데 적합한 자료구조와 문장들을 가지고 있지 않기 때문에 시뮬레이션 프로그램을 작성하거나 모델의 변경에 어려움이 많다. 본 논문에서는 신경망 시뮬레이션 프로그램을 작성하는데 적합한 언어를 설계하였다. 특히 제안된 언어는 신경망 구조를 쉽게 표현할 수 있고 신경망의 동작행위를 효율적으로 기술하기 위하여 층마크로 정의 개념을 도입하였다. 언어는 두개의 DIVISION으로 구성되었다. 하나는 망구조를 기술하기 위한 NETWORK STRUCTURE DIVISION이고 다른 하나는 신경망의 행위를 제어하는 PROCEDURE DIVISION이다. Most of neural network simulation programs have been implemented with the conventional computer languages. It is difficult to implement simulation programs and is various to build neural network, because the languages have not data structures and statements suitable for expressing neural network structures and controlling neural behaviors. This paper describes a neural network simulation language, specifically designed for the development and modeling of neural network applications. It has a layer macro definition concept to express the arbitrary network structures and dynamic neural behaviors easily. It consists of the two divisions. First division describes the network structures. Second division controls the network behaviors.
대구지하철화재 현장 수습체계 분석을 통한 신도시 재난대응체제 구축에 관한 연구
홍원화,김태현,전규엽 대한건축학회 2004 대한건축학회논문집 Vol.20 No.10
The disaster was breaking out at JungAnglo station in Daegu It might be ended as a typical fire happening but proceeded to the disaster because of the inappropriate system of disaster prevention we had taken, the lack of understanding and specialization about Even though many cities have been studied about disaster prevention The synthesis operation and management of disaster prevention we used before have not been prevention system Thus investigating and analyzing document about international and domestic urban fire and disaster system keep us, being in force and studying at present We try to get the point and search the system of advanced nation Up to now, the conditions of damage from disasters and accidents in Korea are getting disaster system We compare to system of disaster Japan, American and Korean This is the introduce abstract of fire disaster at Daegu subway and Sampoong department store This study of analyze of the Timetable and system for settlement resulted from disasters too And we setup new disaster confrontation system