항공사진을 이용한 금오산 지역의 토지이용 및 임분재적의 (林分材積) 변화에 관한 연구

오동하(Dong Ha Oh),김갑덕(Kap Duk Kim) 한국산림과학회 1990 한국산림과학회지 Vol.79 No.4

This study was conducted to investigate the changes of land use and stand volume around Mt. Kuem-O by B/W aerial photographs in 1979 and B/W Infrared aerial photographs in 1988. The results obtained in this study were as follow : 1. In classification of forest type on aerial photographs, coniferous stand was dark tone and hardwood stand was light tone and irregularly rounded crowns. 2. In classification of coniferous stand, Pinus densiflora was narraw cone and rounded tip of crowns and rough texture, Pinus rigida was irregulary rounded and broadly conical crowns. 3. To refer to changes of forest land area, mixed forest was changed into P. desiflora (687 ㏊), P. rigida (130 ㏊) and hardwood stand (219㏊). 4. The regression equations between crown diameter and DBH were significant at 1% level by F-test in all stands. So the equation, D=a+bCD was used to estimate DBH. 5. The tree height curve equations were significant at 1% level by F-test in all stands. To estimate tree height the equation, logH=loga+blogD was adopted in P. densiflora and L. leptolepis and H=a-bD-cD² was adopted in F`, rigida, hardwood stand and mixed forest. 6. The highest volume per hectare was observed in L. leptolepis and mixed forest showed the greatest growth percentage, while the lowest volume per hectare and growth percentage were observed in hardwood stand.

지리정보시스템을 이용한 실무형 산림경영전산모델의 개발

정주상,박은식,오동하 ( Joo Sang Chung,Eun Sik Park,Dong Ha Oh ) 한국산림과학회 1998 한국산림과학회지 Vol.87 No.2

It is not an easy task for forest managers to make sound decisions on forest management and operations planning because of huge sets of spatial and temporal data and complex decision-making processes involved. However, as an efficient tool, GIS techniques enable them to enhance broad understandings on forest inventory and management conditions. In this study, we developed a GIS model for field use in forest management. In building the model, we have chosen MapInfo version 4.0 as the basic engine of the model. The model also includes an interface module to help forest managers use MapInfo functions easily. It handles MapInfo functions required to manage inventory data and analyze spatial distributions of forest stands. For testing field applicability of the model, we have build field data sets for a district of Chunchun National Forest. Then, we tested functions through quarrying stand attributes and constructing thematic maps. In this paper, the structures and functions of the model as well as the results of field applications are discussed.

백운 심대윤(白雲 沈大允)의 독역십법(讀易十法)에 관한 연구 -효위법(爻位法)을 중심으로-

최정준 ( Jeong Jun Choi ),오동하 ( Dong Ha Oh ) 한국사상사학회 2016 韓國思想史學 Vol.0 No.52

본 논문은 심대윤의 독창적 해석이론인 효위법과 나머지 9조목의 독역법을 고찰함으로써 독역십법이 한국역학사에서 갖는 의미를 밝혀보고자 하는데 그 목적이 있다. 심대윤의 독역십법은 명(名), 의(義), 도(道), 용(用), 변(變), 위(位), 시(時), 정(情), 상(象), 사(辭)라는 10가지 천하의 인사범주에서 착안한 해석방법론으로, 그는 이것이 자연의 이치와 수리에 부합하며, 인간이 인위적 가감으로 조작할 수 없는 역(易)의 총체적 원리이자 체계라고 설명하고 있다. 이는 곧 『주역』이 자연과 인사의 원리를 근거로 모든 사물의 이치와 실정을 설명하는 체계임을 의미한다. 또한 심대윤은 역은 곧 상(象)이라는 관점에서 사물의 실리(實理)가 천지만물의 상에 갖추어져 있음을 지적하고, 독역십법의 해석근거를 괘효(卦爻)의 상에서 찾았으며, 이를 통해 인사의 이치와 실정을 비롯한 처세윤리로서의 시중지도(時中之道)를 설명하고자 하였다. 독역십법은 『주역』의 해석범주를 체계화시킴과 동시에 자신의 창의적 사유를 결합시켜 이론적 완성도를 높이고, 이를 통해 『주역』의 해석틀을 재정립하고자 했음에 그 의미가 있다. 또한 지금껏 모호하게만 사용되었던 육위(六位)개념을 공간 시간 강유의 3요소로 해체시키고, 괘위(卦位) 괘시(卦時) 효위(爻位)라는 해석법으로 재구성하여 보다 체계적이고 세밀한 효사해석을 가능케 하였다. 이 가운데 효위법(爻位法)은 육위의 강유(剛柔)개념을 천착한 이론으로, 일찍이 한중의 학자들에게서 보지 못했던 심대윤만의 독창적 효사해석이론이라는데 그 역학사적 의미를 갖는다. This paper aims at finding the significance of Dokyeoksipbeop in the the history of Korean Iching by reviewing Hyouibeop, a distinctive theory of interpretation established by Bagun, and other 9 clauses of dokyeokbeop. Dokyeoksipbeop of Baekun is a theory of interpretation inspired by 10 principle categories of human affairs that are Name(名), Meaning(義), Tao(道), Usage(用), Change(變), Status(位), Moment(時), State(情), Symbol(象) and Words(辭), which he claims to coordinate with the order of the world and to be the wholistic system and mechanism of Iching that is inalterable by artificial influences. This infers that Iching is the system that provides adequate and accurate explanation of the entire matter and state of the world based on the principles and orders of nature and human affairs. Baegun also explains from the aspect that identifies Iching to symbols, pointing out how the real reason of all matters are represented in the appearance of the world itself. He also places the foundation of the interpretation of Dokyeoksipbeop in the appearances of Gwaehyo(卦爻), where he tries to describe Sijungjido(時中之道) as the worldly ethics including the principles of the humanly matters and states. Dokyeoksipbeok of baegun has it``s own significance in that it systemizes the interpretation categories of Iching, advances the theoretical completeness by adding his own ideas, and attempts to reestablish the frame of analysis on Iching. Furthermore, it becomes possible to interpret Hyosa(爻辭) more systemic and in detail by the virtue of the theory, where ambiguous meaning of Yookwi(六位) is classified into Space Time GangYu(剛柔) and reorganized into Gwaewi(卦位) Gwaesi(卦時) Hyouwi(爻位). As far as the originality in Hyosa interpretation, Hyouibeop, inquired by the concept of GangYu, is a distinctive theory in the korea and china scholar society.

수목의 소음감쇄효과

김성일(Seong Il Kim),오동하(Dong Ha Oh) 한국산림과학회 1994 한국산림과학회지 Vol.83 No.3

To investigate the noise attenuation effects of various vegetation configurations, noise levels on 6 study sites along relatively heavy traffic roads were measured. The differences between noise level measures at 1m and 10m spots from the road range from 10 to 15dB depending upon the attributes of the vegetation. When flat grass land was set to control plot, the maximum noise attenuation at 10m spot was measured at the densely planted shrubs with 5dB difference. The areas on upward slope from the road showed the least attenuation effects. Based on the study results, an appropriate setting for low level residential area noise buffer belt would be densely planted shrubs with at least 3m width and 2m height. To be effective, 3m width soft areas covered with grasses are needed at the front and behind sides of the belt. More than 15dB of the noise level caused by the road traffic would be attenuated with the prescription.

부산시 도시하천의 어류군집과 하천복원을 위한 제안

윤주덕 ( Ju Duk Yoon ),장민호 ( Min Ho Jang ),오동하 ( Dong Ha Oh ),주기재 ( Gea Jae Joo ) 한국하천호수학회 2007 생태와 환경 Vol.40 No.2

실시간 주문 확답을 위한 데이터 마이닝 기반 운용 계획 모델

한현수,오동하 한국경영과학회 2004 經營 科學 Vol.21 No.3

In the rapidly propagating Internet based electronic transaction environment, the importance of real time order confirmation has been more emphasized. In this paper, using data mining techniques, we develop intelligent operations decision model to allow real time order confirmation at the time the customer places an order with required delivery terms. Among various operation plannings used for order fulfillment, mill routing is the first interface decision point to link the order receiving at the marketing with the production planning for order fulfillment. Though linear programming based mathematical optimization techniques are mostly used for mill routing problems, some early orders should wait until sufficient orders are gathered for optimization. And that could effect longer order fulfillment lead-time, and prevent instant order confirmation of delivery terms. To cope with this problem. we provide the intelligent decision model to allow instant order based mill routing decisions. Data mining techniques of decision trees and neural networks, which are more popular in marketing and financial applications, are used to develop the model. Through diverse computational trials with the industrial data from the steel company, we have reported that the performance of the proposed approach is effective compared to the present heuristic only mill routing results. Various issues of data mining techniques application to the mill routing problems having linear programming characteristics are also discussed.