전자 유체역학의 야금학적 응용

조영환,윤종규 대한금속재료학회(대한금속학회) 1986 대한금속·재료학회지 Vol.24 No.8

국민학교 조경에 있어서의 식물이용체계에 관한 연구: 목포시내 15개 국민학교를 대상으로-

조영환,박천호 한국조경학회 1987 韓國造景學會誌 Vol.15 No.2

This study was conducted to find out the fundamentals for proper use of Planting system in the elementary school landscape. For this study, 70 text books were applied to quote the plants, planting situation of 15 elementary schools was surveyed, and 1,464 questionnaires were collected. The resultes and some proposals obtained are summarised as follows ; 1. Total of 177 plant species were quoted over all text books of the elementary school course. Among them, the woody species showed the highest in number with 58 and herbaceous were the next with 30, the other were vegetable of 29, food crops, weeds, industrial ornamentals crops and water plants in order. They were common species in this country and were easy to cultivate except few. 2. 210 species were planted at the 15 elementary schools in Mokpo. It was constituted of 77 of herbaceous species and 133 of woody species but localized Plants were little. The herbaceous plant frequently used were Chrysanthemum morifolium, Targests erecta, Salvia splendens, Petunia hybrida, Cosmos bipinnatus, Celosia cristata, Canna generalis, et. On the other hand in the woody species Juniperus chinensis var. kaizuka, Cerdus deodora, Camellia japonica, and in the shrub Serissa japonica, Thuja orientalis, Euonymus japonica, Buxus mrcrophylla var. koreana etc in order. Almost the same species of woody plants described above were planted in zone of I -IV. Therefore, many problems were found in aspect of aesthetics, and their function and growth. There was much differences in number of species and quantity of plants in each elementary school. However they were not associated with school size, location, and age of schools. Most of elementary schools did not have same the plants as they were represented in text brooks. Therefore, in view of educational purpose it needs to plant more species which quoted in text books.

초음파 Hyperthermia용 동심환 변환기의 설계에 관한 연구

조영환,성굉모 한국음향학회 1986 韓國音響學會誌 Vol.5 No.4

초음파 Hyperthermia를 이용한 치료는 정상세포에 열적 손상을 주지 않으면서 종양 부위만을 적당한 온도로 가열하여야 하며 따라서 종양세포와 정상세포에 대한 정확한 초음파 세기조절이 필요하 게 된다. 본 논문에서는 초음파 Hyperthermia 용 변환기로서 초점거리와 가열범위를 전자적으로 쉽게 조절할 수 있는 동심환 배열 변환기를 설계하였으며 컴퓨터 모의 실험을 통해 그 성능을 예측하였다. 설계된 변환기는 유효직경 118mm, 동작주파수 320kHz 이며 배열 요소의 수는 12개이다. 그리고 이와 같은 동심환 변환기를 동작시키기 위해 카운터를 이용한 디지털 위상 조절 회로를 설계 제작하였으며, 실험 결과, 위상차를 갖는 신호를 발생시킬 수 있었다.

Determination of Alpha Defect Center in the Nature Using EPR Spectroscopy

조영환,현성필,한필수 한국자기공명학회 2001 Journal of the Korean Magnetic Resonance Society Vol.5 No.1

Natural alpha radiation produced a stable defect center to certain minerals. Electron Paramagnetic Resonance(EPR) spectroscopy is a powerful tool for quantifying this defect center. EPR method has been applied to trace alpha-radiation effect around the uranium ore deposit. The results show that EPR technique can be used to measure rapidly and nondestructively the defect center produced by natural alpha radiation. In general, a good correlation was achieved between defect center concentration and actinide elements(U, Th). These results imply that the concentration of defect center is dependent on the alpha radiation dose over long time scale 영어논문

기계화학반응에 의한 TiN/TiB₂/Ti-silicides 나노복합분말의 합성과 반응기구

조영환,김지우,심재혁,안재평,오규환,Cho Young-Whan,Kim Ji-Woo,Shim Jae-Hyeok,Ahn Jae-Pyoung,Oh Kyu-Hwan 한국분말야금학회 2005 한국분말재료학회지 (KPMI) Vol.12 No.4

Nanostructured TiN/$TiB_2$/$TiSi_2$ and TiN/$TiB_2$/$Ti_5Si_2$ composite powders have been prepared by mechanochemical reaction from mixtures of Ti, BN, and $Si_3N_4$ powders. The raw materials have reacted to form a uniform mixture of TiN, $TiB_2$ and $TiSi_2$ or $Ti_5Si_3$ depending on the amount of $Si_3N_4$ used in the starting mixtures, and the reaction proceeded through so-called mechanically activated self-sustaining reaction (MSR). Fine TiN and $TiB_2$ crystallites less than a few tens of nanometer were homogeneously dispersed in the amorphous $TiSi_2$ or $Ti_5Si_3$ matrix after milling for 12 hours. These amorphous matrices became crystalline phases after annealing at high temperatures as expected, but the original microstructure did not change significantly.

南北韓 統一환경과 展望 : 美國의 立場에서

曺瑛煥 대구효성가톨릭대학교 현대사상연구소 1992 현대사상연구 Vol.3 No.-

나는 왜 LG마이크론을 웃기려 하는가?

조영환 한국엔터테인먼트산업연구원 2006 ceri 엔터테인먼트연구 Vol.5 No.-

TPN 업무의 전산화와 운영현황

조영환,김정태 한국병원약사회 1998 병원약사회지 Vol.15 No.4

OCS 시행 이후 진행되고 있는 다기능의 병원 정보시스템 개발의 일환으로 시작한 TPN 처방 자동화는 앞으로 응용 가능한 분야가 다양하다고 할수 있다. 첫째, consult의 전산화가 가능하다. 병원OCS를 이용해서 TPN consult를 의무화하므로써 적절한 영양요법 시행을 위한 약사의 적극적 임상업무 수행의 기회를 제공할 수 있고 둘째, TPN 전산 처방 software를 개발, 보금해서 병원간 TPN 처방 시스템을 표준화(단위의 표준화, Iabel 형식의 표준화등)할 수 있고 각 병원마다 개발할 때 드는 비용이 절감 될 수 있을것이다.

都市林學(Urban Forestry)의 學問的 體系와 都市綠地空間에 對한 適用 硏究

조영환,Cho, Young-Hwan 한국조경학회 1990 韓國造景學會誌 Vol.18 No.3

It is the purpose of this study to address how to manage the urban vegitation using the concept of Urban Forestry which is relatively new to Korea. When we consider the Urban Forestry as a science, We should understand it interdisciplinary subject which includes Forestry, Horticulture, Urban Planning, Landscape Design, Landuse Planning, Business and Humanities. It may say that people and tree are the fundermental components of Urban Forestry. So there are two ways of Urban Forestry Applications-How people care for trees and How trees care for People-. For the application, this study places the focus on the monetary valuation, tree inventory system and traditional forestry application to urban forest management. Pubic Relation, Communication, Ordinances and Budget are also mentioned as a part of Urban Forestry Policy. Monetary valuation of trees and forests is very important for the proper cognition of their real value. So that, they may be equated and weighed against conflicting uses which would cause to be removed or severely mutilated. A tree inventory system which is the essential part of urban tree management can provide the pertinent information about the present condition of urban tree resource. It may aid in reducing the subjectivity of tree management decisions and stimulate them to be made rapidly and can help reduce potential municipal liability by identifying serious problems in time for corrective maintenance practices to be applied for the maximize community benefits and minimimize public nuisances or hazards. Managers can derive the information from the inventory and use it for the various management plan. When we see the structure of tree inventory system as one of the data base management system, Computer is the best equipment for the efficient management plan. Public relation and communication is also important factors to care the people for urban vegetation management. Volunteer management system is a good example for the public relation and communication. Those skills are need to develop for using the priceless, valuable human resources. Budget holds the key to the execution of Urban Forestry. Good inventory can provide for efficient budgeting stratiges through it's scientific analysis for the way of maximum benefits and minimum costs. Forest can be play a vital role for the aesthetic improvement and recreation in the city. This study suggests that the traditional sivicultural application not only improve the quality of scenic beauty and recreation but also the products of timber. So it is more needed to study for strong and scientific application to urban forest management.

초음파의 의학적 응용 - 초음파 영상 진단기를 중심으로

조영환 대한전자공학회 1995 전자공학회지 Vol.22 No.5