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분재소재의 효율적인 생산을 위한 이화학적 특성 연구 -화학적 조성분 및 휨 성능-
권영한 ( Kwon Yeong Han ),양재경 ( Yang Jae Gyeong ),김태홍 ( Kim Tae Hong ),변희섭 ( Byeon Hui Seob ),임부국 ( Im Bu Gug ),박남창 ( Park Nam Chang ) 한국산림과학회 2003 한국산림과학회지 Vol.92 No.4
This study was performed to abtain the physicochemical characteristics of wood for effective bonsai material production. Three species of of bonsai material were Lagersroemia indica, Acer buergerianum, Ligstrum obtusifolium. Chemical component included lignin, holocellulose, organic solvent extractives and ash were analyzed. Mechanical properties determined were modulus of elasticity(MOE), modulus of rupture(MOR) and deflection. The results obtained from this study indicated that holocellulose content plays a very important part in bonsai material. Decrease of MOE facilited in bending test of bonsai material. In the other side, increase of MOR also influenced on bonsai material.
권태성 ( Kwon Tae Seong ),박영석 ( Park Yeong Seog ),권영한 ( Kwon Yeong Han ),송미영 ( Song Mi Yeong ),신상철 ( Sin Sang Cheol ),박지두 ( Park Ji Du ) 한국산림과학회 2003 한국산림과학회지 Vol.92 No.6
This study was carried out to estimate the effects of aerial applications of fenitrothion on arthropod communities in pine forests. Since 1988 the applications have been conducted in Busan and Gyeongsangnam-province to control Monochamus alternatus Hope, a vector of the pine wilt disease, Bursapelenchus xylophilus (Steiner 81 Buhrer) Nickle. Abundance, species richness and community structure of arthropods in crown, undergrowth and ground of pine forests were compared between the aerial-sprayed and un-sprayed sites in the 4 regions in Busan and Gyeongsannam-province of Korea. The pesticide aerial applications did not make any significant influences on the abundances (No. individuals per sample) and taxon composition of arthropods, whereas it made some effects on species diversity. Arthropod richness (no. species per site) in undergrowth was lower in long-term pesticide applied sites than in short-term applied sites, whereas P-diversity (heterogeneity of species) of arthropod communities in ground was lower in pesticide-treated sites than in untreated sites.
오진관 ( Jinkwan Oh ),권영한 ( Younghan Kwon ) 한국환경영향평가학회 2015 환경영향평가 Vol.24 No.3
환경영향평가법 개정으로 전략환경영향평가가 도입되어 대상계획을 15개 정책계획과 86개 개발기본계획 체계로 개편하여 시행하였지만 최근 평가 대상계획의 확대에 대한 논의가 국가 환경영향평가 정책의 중요한 이슈이다. 이에 본 연구에서는 각국의 법령이나 지침에 제시된 전략환경평가 대상계획을 비교하여 대상계획에 포함되어야 하는 계획들을 제안하고자 한다. 총 10개국의 전략환경평가 대상계획을 조사하였으며, 대상계획이 법령이나 지침에 명시되어 있는 독일, 프랑스, 이탈리아, 영국 및 네덜란드의 사례들을 우리나라 전략환경영향평가 대상계획과 비교하였다. 본 연구를 통해 다수 국가의 연방수준 계획에포함되어 있으며 환경에 상당한 영향을 미칠 것으로 예상되는 도시계획 분야와 에너지계획 분야의 상위계획 중 광역도시계획, 도시, 군 기본계획, 에너지기본계획, 전력수급기본계획들을 전략환경영향평가 대상계획에 포함할 것을 제안하였다. The Strategic Environmental Impact Assessment(SEIA) in Korea has been introduced and implemented for 15 policy-level plans and 86 project-level plans since 2012. Lately an important issue of the Environmental Impact Assessment(EIA) policy has been emerged regarding the expansion of the policy-level plans subjected to SEIA. Thus, we propose the plans that need to be included in the system, compared with those subjected to the Strategic Environmental Assessment(SEA) enforced in the law or the guideline of 10 foreign counties, especially with those of Germany, France, Italy, the United Kingdom, and Netherlands. Specifically the study suggests that plans related to energy as well as land use, which are well known to cause potential environmental impacts and subjected to the federal-level SEA in those countries, should be the subject of SEIA.
공광성 ( Kong Kwang-sung ),권영한 ( Kwon Yeong-han ),김희채 ( Kim Hee-chae ),이현채 ( Lee Hyun-chae ) 대구가톨릭대학교 인문과학연구소 2017 인문과학연구 Vol.0 No.30
These findings introduced in this article are deemed to be very closely connected to ethnobotany. This article is the “Chomokhwahuei”, included in the [Dongyu Diary] which was written by Song Ju Sang (1695-1751) from the late Chosun Era. The [Dongyu Diary] by Song Ju Sang is a writing in diary format which records the sightseeing of the Geumgang Mountain, specifically recording the peculiarities of the plants observed which are included in a separate section called “Chomokhwahuei”. In this section, the place of observation and the name and characteristics of the plants are recorded. Although it is a short recording of merely 2 pages, it is credited for its unusual recording of vegetation in the Geumgang Mountain area and deemed to be useful for ethnobotanical studies. With this article, we are able to roughly study the vegetation and its dispersion 260 years ago in the Geumgang Mountain area of the Chosun era and discover the binomial nomenclature of the plants then, not to mention the way the people back in this ear observed their plants. However, it is difficult to comprehend this article because it was written in cursive characters. In this document, the author and his bibliography are to be briefly reviewed and we will review the plant species and discuss the value of the article “Chomokhwaheui”, as the original text will be translated. We hope the information of the old plant names learned through this study will contribute to an accurate interpretation of the plant name discovered in the old text and their ethonobotanical utilization.
균열발생시기 결정을 위한 항공기 엔진 구성품의 비파괴검사 결과에 대한 통계적 분석
최재만(Jaeman Choi),권영한(Younghan Kwon),최환서(Hwanseo Choi),양승효(Seunghyo Yang),우상욱(Sangwook Woo),조순미(Soonmi Cho),이승주(Seungjoo Lee) 대한기계학회 2009 大韓機械學會論文集A Vol.33 No.12
In this study statistical analysis was performed for NDI(Non-Destructive Inspection) results of F100 engine front seal support assembly. NDI results can be statistically considered as Quantal Response Data. It is found that the suitable probability distribution to the failure data is normal distribution through MLE(Maximum Likelihood Estimation) of the Quantal Response Data. Moreover, Cumulative Distribution Function, failure rate function and B-Life are calculated on the supposed distribution.