• Journal of the Korean Wood Science and Technology
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• v.35 no.6
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• pp.31-42
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• 2007

To investigate the pyrolytic and anatomical characteristics of Korean softwood, Pinus densi-flora, Pinus rigida and Larix leptolepis, and hardwood, Acer palntatum, Fraxinus rhynchophylla and Quercus variabilis, chemical components analysis, TG-DTA (Thermogravimetric Analysis & Differential Thermal Analysis), MBA (Methylene Blue Adsorption) test and SEM observation were carried out. For TG-DTA, samples were carbonized up to $800^{\circ}C$ at the heating rate of $10^{\circ}C$/min under $N_2$ flows 1 l/min using thermogravimetric analyzer. Chemical component analysis of all samples resulted in typical contents of major wood component. In TG-DTA results, softwood showed higher char yield than hardwood, and lignin displayed the highest char yield among the major wood components. All samples showed typical TGA, DTG and DTA curves for wood pyrolysis except a few differences between softwood and hardwood. Content of lignin influenced its pyrolysis characteristics, while molecular structure of lignin affected not only the weight loss but also the yield of char. In MBA test results, MBA of softwoods was higher than that of hardwoods. Char of Pinus densiflora showed the highest MBA, but its degree was lower than activated carbon or fine charcoal about 23 and 4 times, respectively. SEM observation showed carbonization process preserves wood structure and retain the micro-structure of wood fibers.

• Journal of the Korean Wood Science and Technology
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• v.35 no.6
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• pp.91-99
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• 2007

Activities of the extracellular enzyme from Fomitopsis palustris, a brown-rot fungi, and by which crystallinity changes of cellulose in the various softwoods, such as Larix leptolepsis, Finns rigida, Finns koraiensis and Finns densiflora by liquid culture, were investigated. Activity of Cellobiohydrolase (CBH) from F. palustris was detected in the every test softwoods culture, showing activities of the Endoglucanase (EG), $\beta$-glucosidase (BGL) and $\beta$-1,4-xylosidase (BXL). It was shown high enzyme activities in the sapwood culture than heartwood of the same wood species, However, the enzyme activities in most of test wood cultures increased with longer incubation time, indicating a possibility of intermix sapwood and heartwood for degradation process by enzyme. Also it was shown that protein patterns of the extracellular enzyme from F. palustris in wood particle substrate of the several domestic softwoods were similar with each other wood species, which suggested the possibility of mixing all softwoods in saccharification by enzyme from F. palustris. Crystallinity reduction value of cellulose by F. palustris was 4.2~20.4% in 4 weeks cultivation, 12.9~28.9% in 8 weeks.

• Journal of Internet Computing and Services
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• v.19 no.3
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• pp.57-66
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• 2018

EDISON ( EDucation-research Integration through Simulation On the Net) is a web simulation service based on cloud compu-ting. EDISON provides that web service and provide analysis result to users through pre-built infrastructure and various calcu-lation nodes computational science engineering problems that are difficult or impossible to analysis as user's personal resources to users. As a result, a simulation execution environment is provided in a web portal environment so that EDISON can be ac-cessed regardless of a user's device or operating system to perform computational science engineering analysis simulation. The purpose of this research is to design and construct a workbench based real - time dynamic service to provide an integrat-ed user interface to the EDSION system, which is a computational science engineering simulation and analysis platform, which is currently provided to users. We also devised a workbench-based user simulation service environment configuration. That has a user interface that is similar to the computational science engineering simulation software environment used locally. It can configure a dynamic web environment such as various analyzers, preprocessors, and simulation software. In order to provide these web services, the service required by the user is configured in portlet units, and as a result, the simulation service using the workbench is constructed.

• Journal of Sasang Constitutional Medicine
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• v.10 no.1
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• pp.41-54
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• 1998

연구목적 : 사상의학(四象醫學)은 인간을 태양인(太陽人), 태음인(太陰人), 소양인(少陽人), 소음인(少陰人)으로 구분하여 동일한 병증에 대해서도 치료를 달리하는 의학이다. 즉 인간을 동일한 원리로 설명하는 것이 아니라 각 체질에 따른 차등성을 통해 각 체질 취약점의 보완을 추구하는 의학이다. 그러면, 무엇이 이러한 인간 구분의 단서가 되었으며 이것이 의학으로까지 적용되는 과정 즉, 사상의학의 성립 과정을 살펴 보는 것을 연구 목적으로 한다. 연구방법 : 동무(東武) 이제마(李濟馬)의 저술로 인정되는 "격치고(格致藁)", "동무유고(東武遺藁)", "동의수세보원(東醫壽世保元)"의 문헌적 자료와 각 편의 저술시기를 통해 동무(東武) 이제마(李濟馬)의 사고의 흐름과 변화를 통해 사상의학이 성립되는 과정을 살펴 보는 문헌적 조사방법을 이용하였다. 연구 결과 및 결론 : 이상의 결과를 통해 아래의 연구 결론을 구하였다. 1. 동무(東武)는 "맹자(孟子)"의 사부지심(四夫之心)을 근거로 인간을 심욕에 따라 비인(鄙人), 박인(薄人), 탐인(貪人), 나인(懦人)으로 구분하였고 인의예지의 사단을 장부에 배속하여 심욕을 몸에 적용하였다. 그러나 "격치고(格致藁)"의 비인(鄙人), 박인(薄人), 탐인(貪人), 나인(懦人)과 "동의수세보원(東醫壽世保元)"의 태소음양인(太少陰陽人)의 직접 연결은 동무 사고의 시간적 흐름을 고려하지 않은 것이며, 동무는 "동의수세보원(東醫壽世保元)" "사단론(四端論)"과 "확충론(擴充論)"을 통해 비박탐라인(鄙薄食懦人)의 심욕(心愁慾)과 태소음양인(太少陰陽人)의 정기(情氣)를 매개로 하여 비인(鄙人)은 태양인(太陽人), 탐인(貪人)은 태음인(太陰人), 박인(薄人)은 소양인(少陽人), 나인(懦人)은 소음인(少陰人)으로 설명함을 확인할 수 있었다. 2. "격치고(格致藁)" "독행편(獨行篇)"과 저술 연도가 동일한 "동무유고(東武遺藁) 교자평생함(敎子平生箴)"을 통해 의학적 사고의 성립을 살펴보면, 동무(東武)의 차등적 장리(臟理)는 희노애락의 성정(性情) 구분이 장리(臟理)의 차이로 발전한 것이 아니라 장부(臟腑) 강약(强弱)에 대한 인식이 선행되고 이를 희노애락(喜怒哀樂)으로 설명하였으며, 또한 "동의수세보원(東醫壽世保元)"의 장부(臟腑) 대소(大小)는 강약(强弱)에 근거한 개념임을 알 수 있었다. 3. 사상의학(四象醫學)의 의학적 설명 도구는 희노애락(喜怒哀樂)이다. 희노애락은 비박탐라(鄙薄貪懦)와는 달리 선악(善惡)의 가치 판단이 들어있지 않으면서 기의 승강을 나타낼 수 있는 중용적 설명 도구로 동무가 의학을 설명하기 위한 최선의 도구였다. 사상의학(四象醫學)에서의 희노애락(喜怒哀樂)은 증치의학(證治醫學)의 음양오행(陰陽五行)의 역할과 같은 것이다. 4. 희노애락(喜怒哀樂)은 "동의수세보원(東醫壽世保元)"에서 성(性), 정(情), 기(氣)로 설명되는데 희노애락의 성(性)과 정(情)은 장부 대소를 설명하는 근거로 체질마다 다른 장국 형성을 가능하게 하고 또한 각기 표기(表氣)와 리기(裏氣)를 손상(損傷)하는 것으로 설명되었다. 희노애락(喜怒哀樂)의 기(氣)는 기(氣)의 승강(升降)을 설명하는 근거로 애기(哀氣)와 노기(怒氣)는 양(陽)으로 직승(直升)과 횡승(橫升)하고 희기(喜氣)와 락기(樂氣)는 음(陰)으로 방강(放降)과 함강(陷降)한다. 이러한 희노애락은 순동역동(順動逆動)의 특성과 상성상자(相成相資)의 특성을 지니는데 희노애락(喜怒哀樂)의 상성상자(相成相資)는 사상의학 고유 개념으로 사상인병증론(四象人病證論)에서 언급하고 있는 성정(性情)과 심욕(心慾)의 편급까지 영향을 미치는 중요한 단서이다.

• Journal of Korean Society of Forest Science
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• v.36 no.1
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• pp.47-55
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• 1977

Diameter growth was surveyed for 22 years-old pitch pine (Pinus rigida Mill.) growing on the forest land (site protected from artificial damage) and the resting place (site open for the recreation) of the Children Park, Seoul, Korea on September 28, 1975. The purpose of the survey was to find out difference in the tree growth between the two sites, and possible causes of the difference. Both the resting place and the forest land have deep fertile sandy-loam soil, moderate slope for south-west. The resting place, however, has much higher soil compactness by treading than the forest land. Before May 5, 1973, the opening date of the park, the trees on the resting place had higher diameter growth than those on the forest land as measured with increament borer. After the Park opening the trees on the resting place showed less growth than those on the forest land. In 1975, the growth on the resting place was less than that of the forest land by 6.5% at 1% significant level. The difference in growth was attributed to the soil compactness of the resting place by treading. The necessity for the same kind of study with other species for the tree management of parks was suggested.

• Journal of Korean Society of Forest Science
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• v.85 no.2
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• pp.316-324
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• 1996

This study was conducted by relative time study to identify the allowance time and basic work time, which is together composed of the total work time, in the wage composition and work process composition. This study was done for the case of a basic one person a group from thinning treatment for some conifer species such as Japanese red pine, Japanese larch, pitch pine and Korean pine. 1. In order to apply the Japanese allowance time of four species to the general conifer case, the maximum value of allowance time composition value among those of four species was selected. The results are as follows: delay time for person 1.8%, rest time 14.1%, delay time for machine 12.5% and wating time 0.4%. The some of ratios of adjustment allowance time is 28.8%. 2. Estimated wage basis time table, which can be used for wage table or process table, was prepared by adding up adjusted general allowance time and standard work time estimated by estimation equation for each species through the time study.

• Journal of Korean Society of Forest Science
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• v.102 no.2
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• pp.247-254
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• 2013

The objective of this study was to assess the canopy fuel characteristics of five major coniferous species in Korea. This study was also developed allometric equations for the canopy fuel load and canopy base height of the major coniferous species using the allomeric equations of biomass developed by the Korea Forest Research Institute and the data from the $5^{th}$ National Forest Inventory. Among the major coniferous fuel types, Pinus koraiensis stands had the highest mean canopy bulk density, 0.34 kg/$m^3$, followed by Gangwon region Pinus densiflora stands 0.28 kg/$m^3$, Pinus thunbergii stands 0.24 kg/$m^3$, Pinus rigida stands 0.15 kg/$m^3$, Central region Pinus densiflora stands 0.12 kg/$m^3$ and Larix leptolepis stands 0.09 kg/$m^3$. The adjusted multiple coefficient of determination of the developed models ranged from 0.6321 to 0.9950 for canopy fuel load and 0.6390 to 0.8539 for canopy base height.

• Journal of Korean Society of Forest Science
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• v.89 no.2
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• pp.185-197
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• 2000

This study was carried out to research structure of forest vegetation and site condition, and supply basic data for conservation of pine forest and ecologically sustainable forest management and control in Anmyondo area. The forest of Anmyondo were largely classified as four forest community : Pinus densiflora community, Pinus thunbergii community, Pinus rigida community, and Quercus variabilis community. Organic matter, total nitrogen, and other nutrients in soil of the study area were relatively low, and average soil pH was 4.9. Soil texture was sandy clay or heavy clay and so the aeration and permeability could be poor. In this study site, the methods such as the promotion of germination of pine seeds through removal of forest floor and inducement of natural regeneration through such method as regeneration under shelter wood would be better than the method such as afforestation after clear-cutting for conservation the pine forests. Also, it will be a good method to practice tending for hardwood species in the dominant areas by hardwood species.

• Korean Journal of Environment and Ecology
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• v.21 no.5
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• pp.379-389
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• 2007

This study was carried out to classify forest vegetation structure of Mt. Gaya from April to October in 2006 using phytosociological analysis methodology of Z-M schools. One hundred study sites(quadrat) were surveyed in the area. The forest vegetation was classified into 3 community groups such as Pinus densiflora community group, Cornus controversa community group and artificial forest group. P, densiflora community group was subdivided into 4 communities such as Rhododendron schlippenbachii community. Salix gracilistyla community, Meliosma oldhamii community and P. densiflora typical community. R. schlippendbachii community was subdivided into Potentilla dickinsii group(subdivided into Carpinus coreana subgroup and Melandrynum firmum subgroup) and R. schlippenbachiitypical group. Cornus controversa community group was also subdivided into 4 communities such as Hovenia dulcis community, Quercus aliena community, Ribes maximowicianum community and C. controversa typical community. Artificial forest type indicated 3 communities such as Larix leptolepis community, Pinus rigida community and Castanea crenata community. Accordingly, the vegetation pattern of the surveyed areas were classified into 3 community groups, 11 communities, 2 groups, and 2 subgroups and the forest vegetation was classified into 13 units in total. It is also believed that C. coreana subgroup and M. oldhamii community could be a source for a significant basic data for making vegetation hierarchy and forest distribution zone in the Korean peninsula. H. dulcis community was also considered to be one of the important genetic resources; therefore, those distribution areas are required to be institutionally protected and managed in the near future.

• Korean Journal of Environment and Ecology
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• v.23 no.3
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• pp.258-271
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• 2009

Various environmental parameters change and ecological succession often lead to decline of Pinus densiflora forest in Seoul. Due to decline of it, we proposed the ecological management for conserving and improving from decrease of its dominant area on there. We analysed the P. densiflora forest's classification and suggested its ecological management that based on relation to competition between dominant species in the upper tree layer, the presence of competitive species in shrub layer and vegetation management standard. The Pinus densiflora forest types has been classified 6 types by ecological characteristics. The results from categorized its types are following as; 1) Pinus densiflora pure forest type; edaphic climax Pinus densiflora forest(26.1%), Pinus densiflora pure forest(21.5%). 2) the forest of Pinus densiflora and other species that compete with each other type; Pinus densiflora-Quercus mongolica forest(28.0%), Pinus densiflora-Pinus rigida forest(13.1%), Pinus densiflora-Quercus acutissima(4.2%). We conclude that the results in these kind of 4 types; Pinus densiflora pure forest type where possible to maintain the forest by edaphic climax, human trampling damage, vegetation management(e.x. remove the competition species, shrub layers management etc.) are mainly need to negative management. Whereas, the others 4 types; Pinus densiflora and other species(Quercus variabilis, foreign species, naturalized species etc.) that compete with each other types are need to positive management such as manage the same niche competition species, shrub layers management, remove the foreign species, naturalized species etc.. In these kinds of ecological management are very necessary to maintain Pinus densiflora forest.