• Journal of the Korean Wood Science and Technology
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• 제29권2호
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• pp.100-108
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• 2001

제재목으로부터 얻을 수 있는 부재(部材)(parts)의 수율을 미리 예측할 수 있다면 최고의 수율 보장이 가능한 방법으로 재단할 수 있으므로 목재산업의 생산성을 크게 향상시킬 수 있다. 특히, 옹이와 같은 결점들이 많이 포함되어 있는 국산 중소경재의 경우 수율 예측을 통한 재단최적화는 매우 필요한 공정이 아닐 수 없다. 본 연구에서는 국산 상수리나무와 소나무를 대상으로 제재목 database를 구축하여 다중 종절우선 공정 모형에 적용함으로써 국산재의 가공효율을 탐색하는 동시에 최고의 수율이 보장되는 재단 방법을 제시하고자 하였다.

• 디지털융복합연구
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• 제18권8호
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• pp.385-390
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• 2020

본 연구는 국내외 기업의 멸종 위기 동물 보호 캠페인 사례를 분석하고 개선점과 방향성을 제시하는 데 목적이 있다. 따라서 본고에서는 중소기업 이상의 국내와 해외 기업을 연구 대상으로 설정하여, 멸종 위기 동물 보호 캠페인 사례와 특징을 분석하였다. 연구 결과 국내에는 규모가 큰 환경 보호 단체와 협력하여 진행하는 프로젝트 중심의 캠페인이 주류를 이루었고, IT 강국답게 통신사와 전자 브랜드의 캠페인 사례를 찾아볼 수 있었다. 해외 기업의 경우 브랜드가 독립적으로 환경 보호에 참여하고, 패션이나 코스메틱 브랜드 캠페인 사례가 쉽게 눈에 띄었다. 본 연구는 이러한 특징을 바탕으로 앞으로 동물 보호 캠페인의 개선점과 나아갈 방향을 제시해보고자 한다.

• Journal of the Korean Wood Science and Technology
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• 제49권2호
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• pp.181-190
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• 2021

Screw-type fasteners are widely used to make connections between wood members or between wood and steel connectors because they can tolerate the applied loads by withdrawal or shearing. In this study, we evaluated the withdrawal resistances of the screw-type fasteners and analyzed the effects of the lead-hole size, relative grain direction (tangential, radial, and cross-sections) of the wood member, screw diameter, screw type, and species. Two wood species, including domestic larch and imported spruce, and three screw-type fasteners, including domestic lag screws (diameters of 9.46, 7.79, and 6.27 mm), domestic tapping screw (diameter, 6.3 mm), and imported Sherpa screw (diameter, 8.0 mm) were used. To assess the effect of lead-hole size, the lead holes with diameters corresponding to 68.7%, 70.8%, and 74.0% of the shank diameter of the lag screw were predrilled. The lead hole corresponding to 74% of the shank diameter was selected for this study because the smaller lead holes required higher rotational force for installation, which may cause damage in the screw neck, although there was no significant difference in the withdrawal resistance depending on the lead-hole sizes applied in this study. The lag screws installed on the tangential and radial surfaces showed similar withdrawal resistances to each other, which were greater than those installed on the cross-sectional surface. As the lag screw diameter increased from 6.27 mm to 9.46 mm, the withdrawal resistance also increased proportionally. The withdrawal resistance of the tapping screw having a diameter of 6.3 mm was almost 1.6 times higher than that of the lag screw having a similar diameter of 6.27 mm, while that of Sherpa screw having a diameter of 8.0 mm was around 1.4 times higher than that of the lag screw having a similar diameter of 7.79 mm.

• 한국가구학회지
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• 제19권3호
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• pp.156-162
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• 2008

Three major domestic softwoods, Korean red pine, Korean pine and larch, were heat-treated at $220^{\circ}C$ and for various treatment times for color changing. A new heat treatment equipment was developed for this study and was revealed working well for changing the colors of the three softwoods. The color difference index of 15 was obtained after 8 hours for Korean red pine and Korean pine, and 10 hours for Larch. The correlations of brightness, redness and yellowness with treatment time were different between species.

• 대한본초학회지
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• 제31권3호
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• pp.23-28
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• 2016

Objective : For the purpose of developing Korean herbology of the plants to Dioscoreaceae in Korea, the literatures of the successive generations have been thoroughly investigated to prepare this article.Methods : Books and research papers about Herbology which published at home and abroad were examined.Results : A list was made about Dioscoreaceae plant which were cultivated or grew naturally in Korea, after investigated the data on domestic and foreign Dioscoreaceae plants. Out of those lists, serviceable plants were selected and with those available plants, their distributions were analysed and parts which can be used as medicines were divided into 3 categories such as oriental medicine name, scientific name and non-official name. Dioscoreaceae's properties flavor, channels they use, effects, and toxicity were also noted. Dioscoreaceae (grew in Korea) were divided into 1 classes with 8 species. Out of those, 1 classes with 7 species were found serviceable which indicates 87.5% of all. Out of all 8 specified Dioscoreaceae plants, Dioscorea plants were found 1 species, which were shown the most. And 1classes of Dioscorea plants were also selected the most in serviceable Dioscoreaceae. Out of all serviceable parts in Dioscoreaceae, Rhizoma parts took first place as 7 species. Toxins are investigated to 1 species.Conclusion : There were totaled to 1 genera and 8 species in Dioscoreaceae in Korea and among them medicinal plants are 4 genera, 7 species, some 87.5% in total.

• 한방안이비인후피부과학회지
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• 제20권3호
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• pp.127-137
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• 2007

Objects : This study was designed to determine origin-plants of 3 kinds of Scrophulariaceae herbs reported worldwide 220 families 3000 species, domestic 21 families 55 species by researching efficacy of each herb. Furthermore the objects of study were confirmation of genuine species and substitution species standing on the results. Methods : In this studies, the origin-plants and efficacy were determined by bibliographic method. Results : The results indicate that 1. There were total 15 species of original plants of Scrophulariaceae herbs, 9 species for Radix Scrophulariae, 4 species for Radix Rehmanniae Recens, 2 species for Rhizoma Picrorrhizae. 2. In the view of authenticity of Radix Scrophulariae, there were 2 genuine species, 1 species for substitution, and study of 6 species later on. 3. In the view of authenticity of Radix Rehmanniae Recens, there were 2 genuine species, 1 species for substitution, and study of 1 species later on. 4. In the view of authenticity of Rhizoma Picrorrhizae, all the original species was genuine species. 5. The each efficacy of origin-plants were reported in the main subject. Conclusions : The 15 original plants were present among the 3 medicinal herbs in the common family scrophul ariaceae. There were 2 genuine species in Radix Scrophulariae and Rhizoma Picrorrhizae. All the original species was genuine species in Rhizoma Picrorrhizae.

• 대한본초학회지
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• 제39권3호
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• pp.11-21
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• 2024

Objective : For the purpose of developing Korean Primulaceae plants, the literature published so far have been thoroughly investigated to prepare this article. Methods : Books and research papers about Herbology which published at Korea and other countries were examined. Results : The results of this study were as follows: 1. A total of 8 genera and 30 species of Primulaceae was found in the Korea, among which 4 genera and 9 species (approximately 30%) were medicinal plants. 2. Among Korean Primulaceae plants, Lysimachia was the most with 11 species. 3. Among medicinal plants, Lysimachia was the most with 5 species, followed by 1 species of Anagallis, 1 species of Primula, and 2 species of Androsace. 4. The domestic distribution of medicinal plants was 4 species in the north part, 7 species in the central part, 7 species in the south part, and 7 species in Jeju island. 5. Among the medicinal parts, the whole body was used the most with 9 species. Among the property flatness property was the most whith 10 species. And among the flavors, bitter taste was the most with 13 species. 6. Lung meridian channel was the most with 3 species. The effect of reducing swelling was the most with 10 species. 7. No toxic drugs have been reported yet. Conclusion : There were totaled to 8 genera and 30 species in Primulaceae in Korea and among them medicinal plants are 4 genera, 9 species, some 30% in total.

• Journal of the Korean Wood Science and Technology
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• 제32권3호
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• pp.1-7
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• 2004

The application of abrasive-assisted high energy water-jet was investigated as a possible new method of cutting wood. In this study the maximum cutting speeds for species of various wood density were determined and water-jet machining characteristics were investigated for sixteen Korean domestic species. The maximum cutting speed ranged from 200 to 750 mm/min. The results indicate that wood density affects machining characteristics such as maximum cutting speed, surface roughness, and kerf width. Roughness of surface generated increased and kerf width decreased as penetration depth increased.

• 환경생물
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• 제35권3호
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• pp.289-295
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• 2017

The freshwater algae were collected at reservoirs and small ponds in Gyeonggi-do and Jeju-do on June 2016. Four species of Korean previously unrecorded algae were collected in domestic fresh waters: Coelastrum rugosum, Cosmarium baccatum, Cosmarium norimbergense and Staurastrum connatum var. pseudoamericanum. The morphological characteristics of the four taxa identified in this study were showed mostly similar to the characteristics of the previously reported characteristics. However, Cosmarium baccatum was larger than the previously recorded species and Staurastrum connatum var. pseudoamericanum was wider than the previously recorded species.

• 생명과학회지
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• 제18권8호
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• pp.1031-1035
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• 2008

한국산 양치꽃파리류는 현재까지 10종이 알려져 있으며, 새로이 1 한국미기록종, Chirosia flavipennis (짧은배양치꽃파리, 신칭)을 추가하고자 한다. 또한 한국산 양치꽃파리 11종에 대한 수컷외부 형질에 의한 계통학적 분석을 실시하였다. 군외군으로 선택한 꽃파리과(Anthomyiidae) 내의 씨고자리파리(Delia platura), 어리꽃파리(Anthomyia angulata)와 근연과인 집파리과(Muscidae)의 집파리(Musca domestica), 똥파리과(Scathophagidae)의 똥파리(Scathophaga stercoraria)와 비교 분석에서 전통적인 분류와 유사한 결과를 얻을 수 있었다.