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A Study on Interindustry Analysis between Forestry Sector and Other Industrial Sector (임업부문(林業部門)과 타산업부문간(他産業部門間)의 산업관련분석(産業關聯分析)에 관(關)한 연구(研究))

  • Kim, Jong Ho;Park, Tae Sik
    • Journal of Korean Society of Forest Science
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    • v.68 no.1
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    • pp.1-10
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    • 1985
  • This study was carried to analyze the structural change of interrelationships between the forestry including forest product processing and the other industrial sectors. The interindustry tables (19 setors) were drawn with the aid of the interindustry table published in 1970, 1975 and 1980 in connection with the forestry and forest product processing. In addition, the input coefficient and inverse matrix coefficient were calculated in the light of the 19 sector of interindustry tables. Owing to the change of economic structure during the period of 1970-1980, the importance of forest in Gross National Product has been decreasing. But it has shown that forestry is a kind of original industry having a great deal of intermediate demand which is constantly increasing. Therefore, forestry could be regarded as a supply industry to other industries. In addition, the import coefficient of forestry products in larger than that of other industries and it keeps increasing.

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Speed-limit Sign Recognition Using Convolutional Neural Network Based on Random Forest (랜덤 포레스트 분류기 기반의 컨벌루션 뉴럴 네트워크를 이용한 속도제한 표지판 인식)

  • Lee, EunJu;Nam, Jae-Yeal;Ko, ByoungChul
    • Journal of Broadcast Engineering
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    • v.20 no.6
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    • pp.938-949
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    • 2015
  • In this paper, we propose a robust speed-limit sign recognition system which is durable to any sign changes caused by exterior damage or color contrast due to light direction. For recognition of speed-limit sign, we apply CNN which is showing an outstanding performance in pattern recognition field. However, original CNN uses multiple hidden layers to extract features and uses fully-connected method with MLP(Multi-layer perceptron) on the result. Therefore, the major demerit of conventional CNN is to require a long time for training and testing. In this paper, we apply randomly-connected classifier instead of fully-connected classifier by combining random forest with output of 2 layers of CNN. We prove that the recognition results of CNN with random forest show best performance than recognition results of CNN with SVM (Support Vector Machine) or MLP classifier when we use eight speed-limit signs of GTSRB (German Traffic Sign Recognition Benchmark).

Analysis on the exit strategy of ODA for sustainability: a case study from the Greenbelt Plantation Project of Mongolia

  • Kim, Ki Hyun;Kim, Se Bin
    • Korean Journal of Agricultural Science
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    • v.47 no.3
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    • pp.425-435
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    • 2020
  • Official development assistance (ODA) projects are conducted under the auspices of donor countries and on the principle of time-limited implementation for economic development and welfare improvement in a host country. Exit strategies on how to end official assistance are therefore crucial. Sudden economic recession in a donor country could lead to the suspension of ODA projects, which would affect diplomatic relations and project outcomes. Further, exit strategies can help continue the original project and create links with other ODA projects. This study shows how to employ exit strategies in the Korea-Mongolia Greenbelt Plantation Project and has implications for sustainability of development assistance. Exist strategies were not taken into consideration initially. In the course of implementation and management transfer upon the completion of plantation, various facets were considered later on in developing exit strategies. An ideal exit strategy is to reach the extent to which a host country no longer needs official assistance or has capacity of project implementation on its own. A year-by-year transfer of planted areas can be a phase-over strategy. The Korea Forest Service fulfilled transparent cooperation with Mongolian local governments, established appropriate arrangements with stakeholders, secured institutional and financial foundation for follow-up management by a host country, and realized predictability, responsibility, and sustainability. As a local institution, the plantation technology management center has been established for follow-up activities such as the introduction of agro-forestry. When the Korea Forest Service designed an urban forest project as an exit strategy, sustainability was ensured, which has implications in implementing other ODA projects.

A Critical Review of "Type Specimens Collected from Korea at the Herbarium of the University of Tokyo" and "Korean type Specimens Deposited in Foreign Herbaria and Museums" ("Type Specimens Collected from Korea at the Herbarium of the University of Tokyo"와 "Korean Type Specimens Deposited in Foreign Herbaria and Museums"의 오류에 대한 비평)

  • Eom, Hyun-Joo;Chang, Chin-Sung;Kim, Hui
    • Journal of Korean Society of Forest Science
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    • v.99 no.4
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    • pp.447-469
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    • 2010
  • The recent publications of two major works from Ministry of Environment and Korea National Arboretum (Type specimens collected from Korea at the herbarium of the University of Tokyo, five volumes) and National Institute of Biological Resources (Korean type specimens deposited in foreign herbaria and museums, two volumes excluding other animal groups) on Korean vascular plants have resulted in discrepancies needing either correction or clarification. The former published the results of a portion of T. Nakai's collections deposited at TI, while the latter produced the results about collections of G. Koidzumi's, J. Ohwi's, and S. Kitamura's at Kyoto University and of E. H. Wilson's and H. Leveille's at Harvard University. Consequently some omissions, discrepancies, and conflicts resulted, such as the inclusion of conflicting designations of lectotype, isotype, syntype or holotype, erroneous citations of publications, and misinformation. Suh et al.'s publications about type specimens of Korean plants deposited at TI showed 47 conflicting typifications and 20 typographical and other errors. Type information offered by Yim et al. were discussed, and 75 conflicting typification and 30 typographical and other errors from these two volumes were also brought to notice. It is clear that Suh et al. and Yim et al. merely provided type information without consulting original description of each plant species. It is apparent that all these conflicting designation of types, erroneous citations of publications, and other types of misinformation were as a result of the disregard of original citation and the ignorance of basic type concept.

Studies on the Agroforestry Methods of Wild Edible Greens (IV) - Water Relations Parameters of Three Ligularia Species Leaves Obtained from P-V Curves - (산채류 산지농법 실용화 연구(IV) - P-V 곡선에 의한 곰취(Ligularia)속 3종의 수분특성 -)

  • Han, Sang-Sup;Lee, Kyeong-Cheol;Jeon, Seong-Ryeol
    • Journal of Korean Society of Forest Science
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    • v.99 no.1
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    • pp.131-135
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    • 2010
  • This study was carried out to establish a proper cultivation condition and diagnose the drought-tolerance of three wild edible greens belonging to genus of Ligularia by using pressure-volume curves methods. The result of the original bulk osmotic pressure at maximum turgor Ψsat was -0.8 MPa in Ligularia fischeri and L. stenocephala, which was somewhat lower than the value, -0.7 MPa, in L. fischeri var. spiciformis. In addition, the values of the osmotic pressure at incipient plasmolysis Ψtlp in L. fischeri and L. stenocephala, both of which were -0.9 MPa, These were slightly lower than that of -0.8 MPa in L. fischeri var. spiciformis. On the other hand, it appeared that the values of maximum bulk modulus of elasticity Emax of L. fischeri and L. stenocephala were approximately two times higher than that of L. fischeri var. spiciformis. However, There was a distinct difference between the values of the relative water contents in these three species. Therefore, Ligularia spp, occurring incipient plasmolysis in the high water contents, have a relatively low property of drought-tolerance, suggesting that growth of those Ligularia spp. are appropriate for relative moisture forest.

The Carbon Stock Change of Vegetation and Soil in the Forest Due to Forestry Projects (산림 사업에 의한 산림 식생 및 토양 탄소 변화)

  • Heon Mo Jeong;Inyoung Jang;Sanghak Han;Soyeon Cho;Chul-Hyun Choi;Yeon Ji Lee;Sung-Ryong Kang
    • Korean Journal of Ecology and Environment
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    • v.56 no.4
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    • pp.330-338
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    • 2023
  • To investigate the impact of forestry projects on the carbon stocks of forests, we estimated the carbon stock change of above-ground and soil before and after forestry projects using forest type maps, forestry project information, and soil information. First, we selected six map sheet with large areas and declining age class based on forest type map information. Then, we collected data such as forest type maps, growth coefficients, soil organic matter content, and soil bulk density of the estimated areas to calculate forest carbon storage. As a result, forest carbon stocks decreased by about 34.1~70.0% after forestry projects at all sites. In addition, compared to reference studies, domestic forest soils store less carbon than the above-ground, so it is judged that domestic forest soils have great potential to store more carbon and strategies to increase carbon storage are needed. It was estimated that the amount of carbon stored before forestry projects is about 1.5 times more than after forestry projects. The study estimated that it takes about 27 years for forests to recover to their pre-thinning carbon stocks following forestry projects. Since it takes a long time for forests to recover to their original carbon stocks once their carbon stocks are reduced by physical damage, it is necessary to plan to preserve them as much as possible, especially for highly conservative forests, so that they can maintain their carbon storage function.

Improving and Validating a Greenhouse Tomato Model "GreenTom" for Simulating Artificial Defoliation (적엽작업을 반영하기 위한 시설토마토 생육모형(GreenTom) 개선 및 검증)

  • Kim, Yean-Uk;Kim, Jin Hyun;Lee, Byun-Woo
    • Korean Journal of Agricultural and Forest Meteorology
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    • v.21 no.4
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    • pp.373-379
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    • 2019
  • Smart-farm has been spreading across Korea to improve the labor efficiency and productivity of greenhouse crops. Although notable improvements have been made in the monitoring technologies and environmental-controlling systems in greenhouses, only a few simple decision-support systems are available for predicting the optimum environmental conditions for crop growth. In this study, a tomato growth model (GreenTom), which was developed by Seoul National University in 1997, was calibrated and validated to examine if the model can be used as a decision-supporting system. The original GreenTom model was not able to simulate artificial defoliation, which resulted in overestimation of the leaf area index in the late growth. Thus, an algorithm for simulating the artificial defoliation was developed and added to the original model. The node development, leaf growth, stem growth, fruit growth, and leaf area index were generally well simulated by the modified model indicating that the model could be used effectively in the decision-making of smart greenhouse.

Small-scale spatial genetic structure of Asarum sieboldii metapopulation in a valley

  • Jeong, Hyeon Jin;Kim, Jae Geun
    • Journal of Ecology and Environment
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    • v.45 no.3
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    • pp.97-104
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    • 2021
  • Background: Asarum sieboldii Miq., a species of forest understory vegetation, is an herbaceous perennial belonging to the family Aristolochiaceae. The metapopulation of A. sieboldii is distributed sparsely and has a short seed dispersal distance by ants as their seed distributor. It is known that many flowers of A. sieboldii depend on self-fertilization. Because these characteristics can affect negatively in genetic structure, investigating habitat structure and assessment of genetic structure is needed. A total of 27 individuals in a valley were sampled for measuring genetic diversity, genetic distance, and genetic differentiation by RAPDPCR. Results: The habitat areas of A. sieboldii metapopulation were relatively small (3.78~33.60 m2) and population density was very low (five to seven individuals in 20×20 m quadrat). The habitat of A. sieboldii was a very shady (relative light intensity = 0.9%) and mature forest with a high evenness value (J = 0.81~0.99) and a low dominance value (D = 0.19~0.28). The total genetic diversity of A. sieboldii was quite high (h = 0.338, I = 0.506). A total of 33 band loci were observed in five selected primers, and 31 band loci (94%) were polymorphic. However, genetic differentiation along the valley was highly progressed (Gst = 0.548, Nm = 0.412). The average genetic distance between subpopulations was 0.387. The results of AMOVA showed 52.77% of variance occurs among populations, which is evidence of population structuring. Conclusions: It is expected that a small-scale founder effect had occurred, an individual spread far from the original subpopulation formed a new subpopulation. However, geographical distance between individuals would have been far and genetic flow occurred only within each subpopulation because of the low density of population. This made significant genetic distance between the original and new population by distance. Although genetic diversity of A. sieboldii metapopulation is not as low as concerned, the subpopulation of A. sieboldii can disappear by stochastic events due to small subpopulation size and low density of population. To prevent genetic isolation and to enhance the stable population size, conservative efforts such as increasing the size of each subpopulation or the connection between subpopulations are needed.

Applicability and Safety of in Vitro Skin Expansion Using a Skin Bioreactor: A Clinical Trial

  • Jeong, Cheol;Chung, Ho Yun;Lim, Hyun Ju;Lee, Jeong Woo;Choi, Kang Young;Yang, Jung Dug;Cho, Byung Chae;Lim, Jeong Ok;Yoo, James J.;Lee, Sang Jin;Atala, Anthony J.
    • Archives of Plastic Surgery
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    • v.41 no.6
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    • pp.661-667
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    • 2014
  • Background Tissue expansion is an effective and valuable technique for the reconstruction of large skin lesions and scars. This study aimed to evaluate the applicability and safety of a newly designed skin expanding bioreactor system for maximizing the graft area and minimizing the donor site area. Methods A computer-controlled biaxial skin bioreactor system was used to expand skin in two directions while the culture media was changed daily. The aim was to achieve an expansion speed that enabled the skin to reach twice its original area in two weeks or less. Skin expansion and subsequent grafting were performed for 10 patients, and each patient was followed for 6 months postoperatively for clinical evaluation. Scar evaluation was performed through visual assessment and by using photos. Results The average skin expansion rate was 10.54; take rate, 88.89; and contraction rate, 4.2 after 6 months. Evaluation of the donor and recipient sites by medical specialists resulted in an average score of 3.5 (out of a potential maximum of 5) at 3 months, and 3.9 at 6 months. The average score for patient satisfaction of the donor site was 6.2 (out of a potential maximum of 10), and an average score of 5.2 was noted for the recipient site. Histological examination performed before and after the skin expansion revealed an increase in porosity of the dermal layer. Conclusions This study confirmed the safety and applicability of the in vitro skin bioreactor, and further studies are needed to develop methods for increasing the skin expansion rate.

Water Relations Parameters of Rhododendron micranthum Turcz. from P-V Curves (P-V곡선에 의한 꼬리진달래(Rhododendron micranthum Turcz.)의 수분특성)

  • Kim, Nam-Young;Lee, Kyeong-Cheol;Han, Sang-Sub;Park, Wan-Geun
    • Korean Journal of Plant Resources
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    • v.23 no.4
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    • pp.374-378
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    • 2010
  • Determining plant moisture characteristics is an essential study not only for cultivation, but also for ex-situ conservation. In this study, employing pressure-volume curve we examined moisture characteristics of Rhododendron micranthum, known as rare plant, with the aim of its ex-situ conservation. Several individuals growing in Mt. Worak, Youngwol-gun Yeonha-ri and Bongwa-gun Seokpo-ri were selected for this study, from which we collected leaves. The original bulk osmotic pressure at maximum turgor(Ψosat)was -1.5 MPa in those of Mt. Worak and Seokpo-ri, which is somewhat lower than that of Yeonha-ri(-1.2 MPa). It appeared that the osmotic pressure at incipient plasmolysis(Ψotlp) of leaves collected in both Mt. Worak and Seokpo-ri were -1.29 MPa, and -1.26 MPa, respectively, which are lower than that of Yeonha-ri(-1.02MPa). Maximum bulk modulus of elasticity(Emax) was 14.0 MPa, 8.67 MPa in leaves collected from both Seokpo-ri and Mt. Worak, respectively, those value of which were approximately 3 times higher than that of Yeonha-ri(4.00 MPa). The values of RWCtlp(Relative water content at incipient plasmolysis) of leaves collected in three areas, were roughly 83%, suggesting that Rhododendron micranthum has relatively high capability of containing water. Our finding on moisture characteristics of Rhododendron micranthum is similar to those of other Rhododendron spp. We suggest that individuals growing in both Worak and Seokpo-ri, are preferable to those in Yeonha-ri for ex-situ transplantation since those individuals are found to have better drought resistance.