• Title/Summary/Keyword: wood figures

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Appearance Pattern of Figures in Commercial Domestic Hardwoods (I)

  • Park, Byung-Ho;Kwon, Sung-Min;Kwon, Gu-Joong;Jang, Jae-Hyuk;Kim, Nam-Hun
    • Journal of the Korean Wood Science and Technology
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    • v.38 no.5
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    • pp.391-398
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    • 2010
  • In this study, the figure of domestic hardwood was observed using the naked eye and the possibility of substituting imported wood with domestic one in the making woodcraft or furniture was investigated. It was known from the investigation on 8 different hardwoods that there were various figures such as cloud-shaped figure, blister figure, crotch figure, bird's eye figure, etc. in Zelkova serrata wood and the beautiful pigment figure in Diospyros Kaki wood. There were the unusual figures such as wavy grain figure, fiddle back figure, etc. in Cedrela sinensis wood and was clear ray-fleck figure in Quercus variabilis wood. There were also various figures such as wavy grain figure, blister figure, pigment figure, etc. in Sophra japonica, Tilia amurensis, Castanea crenata, Kalopanax septemlobus wood, etc. It is thus that distinguished figures appeared in each kind of wood can be used for craft, sculpture, furniture, and interior material. These kinds of figures can also be used for instrument, toy, stationery, life article material and souvenir, etc. And it can be expected that they will replace the imported wood has been mainly used to make the woodcraft or furniture until now.

Coating Effect of Low Temperature Melting Bi-Sn Metalized Wood Composites on 10 Different Korean Wood Species (주요 국산재 10가지 수종에 대한 Bi-Sn 저온용융 합금주입 목재복합체의 도장 효과)

  • Park, Kye-Shin;Seo, In Soo;Lee, Hwa Hyoung;Kang, Seog Goo
    • Journal of the Korea Furniture Society
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    • v.25 no.3
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    • pp.223-232
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    • 2014
  • To make metalized wood composites of 10 different korean wood species, it was tested by Low temperature melting Bi-Sn alloy injection method at high temperature and high pressure condition. Metalized wood composite of each wood species had light ash color, but still maintained its own natural wood grain and wood figures. It was evaluated on coating properties. Furthermore, it also was check on effect of coating as like a changes of main color, wood grain and wood figures. The results of test were following as; a coating properties as like a cold resistance, heat resistance, acid resistance, alkali resistance, durability of abrasion, and cross-cut test was proper on the conditions of the KS standard. And, In aspect of color changes, the metalized wood composites of 10 different korean wood species had a light ash color, but still maintained its own natural wood grain and wood figures. Also, the more weight per gain of alloy is, the more grey background of metalized wood composite is.

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Appearance Pattern of Figures in Commercial Domestic Softwoods (국산 주요 침엽수재 문양의 출현 형태)

  • Park, Byung-Ho;Kwon, Sung-Min;Kwon, Gu-Joong;Jang, Jae-Hyuk;Kim, Nam-Hun
    • Journal of the Korea Furniture Society
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    • v.21 no.2
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    • pp.188-195
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    • 2010
  • This study has been focused on the evaluation of domestic softwood timbers to replace imported timbers for woodcrafts and furniture-making. Figures on radial and tangential sections were observed with naked eyes. As the result of study on the figures appeared on the wood surface of 6 species of trees, flat grain and edge grain were clearly found from Taxus cuspidata. Juniperus chinensis and Ginkgo biloba had wavy grain figure and pigment figure, and blister figure was found in Pinus densiflora, Larix kaempferi showed pitch streak and irregular figures on its tangential section due to growth abnormalities. Wavy grain figure appeared weakly on near knot of Pinus koraiensis. The characteristic figures shown from each species of trees are expected to be used for crafts, sculptures, furniture, and interior decoration. They are also considered to have great potential to substitute imported timber sufficiently, which are currently used a lot for wood crafts and furniture-making.

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Radial Variation in Selected Wood Properties of Indonesian Merkusii Pine

  • Darmawan, Wayan;Nandika, Dodi;Afaf, Britty Datin Hasna;Rahayu, Istie;Lumongga, Dumasari
    • Journal of the Korean Wood Science and Technology
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    • v.46 no.4
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    • pp.323-337
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    • 2018
  • Merkusii pine wood (Pinus merkusii) was extensively planted throughout Indonesia, where it is only indigenous in northern Sumatera, by the Dutch during colonial times. The demand for this wood species, especially in the domestic market, has increased notably, despite its limited durability regarding decay resistance. The purpose of this study was to investigate the occurrence of juvenile and mature wood on merkusii pine and to analyze its radial features from pith to bark based on density, shrinkage, static bending in modulus of rupture and modulus of elasticity, fiber length, microfibril angle, and durability. A segmented modeling approach was used to find the juvenile-mature transition. The graveyard test was performed to characterize the termite resistance from pith to bark of merkusii pine. The maturations were estimated to start at radial increments of 15 cm from the pith by fiber length and of 12 cm from the pith by microfibril angle. The projected figures for the proportion of juvenile wood at breast height were around 65%. The results also indicate that the pine wood was $0.52g/cm^3$ in density, 1.45 in coefficient of anisotropy, which indicates its good stability, 7597 MPa in modulus of elasticity, and 63 MPa in modulus of rupture. Natural durability against subterranean termite of the merkusii pine wood was rated to be grade 4 to 0 from pith to bark. However, after being treated by Entiblu and Enborer preservatives, its rating increased to grade 10 to 9.

The Origin of Changseung and Ongjung Stone (장승의 기원과 옹중석)

  • Chung, Seung Mo
    • Korean Journal of Heritage: History & Science
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    • v.46 no.1
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    • pp.160-175
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    • 2013
  • There is the need to make a sharp distinction as regards JANGSEUNGs (Korean traditional totem poles) that are different in origin, history and function. This study is to identify the functions of the figures, as well as to trace stone JANGSEUNGs to their origins. In this regard, researched were conducted into the origins of JANGSEUNGs and their changes in history. There was a tradition in the GORYEO Dynasty (an ancient dynasty in the Korean Peninsula) that it erected JANGSAENGs (the archaic name of JANGSEUNGs) or allied stone figures within temples; especially, 'TONGDOSA GUKJANGSAENG SEOKPYO (a stone JANGSAENG that was erected by the royal command and is at the entrance of TONGDO Temple located in YANGSAN, South GYEONGSANG Province, South Korea)' functions as a stone monument rather than as a stone sign. In the engraved inscription, it is written that it should be erected in the form of PANA as before. 'PANA' refers to 'ZHONGKUI', a god in Chinese Taoism believed to exorcise devils that spread diseases. The inscription is to define the territory of TONGDO Temple. The article on HAN JUN GYEOM in a book 'WORAKGI (a travelogue on WORAK Mountain in North CHUNGCHEONG Province, South Korea)' written by HEO MOK makes it possible to guess the scale of GUKJANGSAENGs erected in DOGAP Temple. The stones, on which 'GUKJANGSAENG' or 'HWANGJANGSAENG' were engraved, are not JANGSAENGs but are demarcation posts. In the JOSEON Dynasty (the last dynasty in the Korean Peninsula) JANGSAENGs functioned as signposts. Unlike JANGSAENGs in temples, they were made of wood. At first, the word 'JANGSAENG' was written '長生' in Chinese characters, but in the JOSEON Dynasty another character '木 (wood)' was added to them, and thus the orthography was likely to change into 'JANGSEUNG.' In the JOSEON Dynasty, in addition, optative or geomantic figures were not called 'JANGSEUNG.' Historically, for instance, there has been no case where 'DOL HARBANGs (stone figures found only in JEJU ISLAND, South Korea)' are called 'JANGSEUNG.' In a book 'TAMRA GINYEON (a historical record on JEJU Island, South Korea)' it is written that KIM MONG GYU, JEJU governor, erected ONGJUNG Stones outside the fortress gate. ONGJUNG Stones usually refer to stone statues erected in front of ancient kings or dignitaries' mausoleums. Moreover, they were geomantic figures erected to suppress miasma. A magazine 'GWANGJUEUPJI (a journal on old GWANGJU, South Korea, 1899)' shows that two two ONGJUNG Stones were so erected that they might look at each other to suppress miasma from a pathway through which lucks lose. On the two stone figures located in BUAN-EUP, North JEOLLA Province, South Korea, inscriptions 'SANGWON JUJANGGUN' and 'HAWON DANGJANGGUN' were engraved. The words are to identify the figures' sexes. They are a kind of optative geomantic figures, and therefore there is no reason to call them 'JANGSAENG' or 'JANGSEUNG' or 'DANGSAN.' The words 'SANGWON' and 'HAWON' are closely associated with Taoism. Since then, the words have been widely used as inscriptions on stone figures in temples, and subsequently are used for JANGSEUNGs. A hatted ONGJUNG Stone, found in BUKANSAN Fortress, disappeared and other ones may be being buried somewhere. Meanwhile, ONGJUNG Stones in JEJU Island and stone figures in BUAN-EUP have hardly been displaced and thus have properly functioned. Stone figures, made in those days, seem to be most similar in function to JANGSAENGs made during the GORYEO Dynasty. Specifically, like earlier JANGSAENGs, stone figures made during the early to mid-18th century were likely to function not only as optative figures but as boundary stones. Most of stone figures in temples were made whenever the land use survey was conducted throughout the nation, but given that at the same period of time, the commonalty filed many lawsuits against grave sites, temples might erect many stone figures to mark their territories. Currently, wooden or stone figures are commonly called 'JANGSEUNG', but they were erected in different epochs and for different reasons. Their origins are to be sought in stone figures that functioned not only as optative figures in temples but as boundary stones during the GORYEO Dynasty.

A prospect of woody toy industry for physical, psychological and intellectual development (창의성 증진을 위한 목질계 소재로 만든 완구산업의 전망)

  • Lee, Won-Hee
    • Journal of the Korea Furniture Society
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    • v.20 no.4
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    • pp.262-273
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    • 2009
  • An investigation was conducted to know a prospect of woody toy in Korea for physical, psychological and intellectual development. It was told that toys that stimulate cognitive development are appropriate for the child's capabilities, responsive to the child's movements, provide feedback when manipulated, and require imagination or fantasy. Toys particularly useful in the development of these abilities include dolls, figures, cuddly toys, puppets, costumes, and construction toys. Therefore, a toy is a wonderful object, indispensable to physical, psychological and intellectual development, both for those who have the capacity to integrate into society and for those who encounter difficulties. If we can replace a plastic toys by a environmental wooden toys, we can contribute to child development that is especially to promote creativity, artistic, problem-solving, language and social skills. In addition, we can support the ability of wood toy manufacturers to market their products in a responsible way and contribute to strengthen the competitiveness of our commodities on international markets.

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Economic Feasibility and Introducing Strategy of Woody Bioenergy in Korea (국내 목질바이오에너지의 경제적 타당성과 도입전략)

  • Choi Don-Ha;Lee Seong Youn;Son Yeong Mo;Park Kyung Seok
    • 한국신재생에너지학회:학술대회논문집
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    • 2005.06a
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    • pp.482-486
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    • 2005
  • Total forest growing stock and growing stock per ha in Korea are $470\times10^6m^3\;and\;73m^3$, respectively. Those figures mean that forest growing stock was increased 4.7 times more during last 30 years. The annual production of forest biomass comes from forest tending executed by Korea Forest Service was estimated about $1.07\times10^6m^3$ M/T, which was equivalent to $0.45\%$ of total imported crude oil of Korea at 2002. The production is expected to increase and reach up to $1.9\times10^6 M/T$ till 2008. The analysis of economic feasibility showed that the production cost of wood chip(134,786Won/T) was about 30,389 Won/T higher than heat value of wood chip, 104,397 Won/T estimated from that of kerosene. For the promotion of forest bioenergy utilization, more efforts need to be given for the education and public relations to induce publicity a willingness-to-pay for the environment friendly fuels under the good understanding for the use of bioenergy. In addition, we need to provide a community-based biomass utilization program by region to allocate the role of each participant and to increase the profitability of bioenergy.

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Chemical Compositions and Antioxidant Activities of Essential Oil Extracted from Neolitsea aciculata (Blume) Koidz Leaves (새덕이 잎 정유의 성분분석 및 항산화활성 평가)

  • Jeong, Min-Ji;Yang, Jiyoon;Choi, Won-Sil;Kim, Jae-Woo;Kim, Seok Ju;Park, Mi-Jin
    • Journal of the Korean Wood Science and Technology
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    • v.45 no.1
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    • pp.96-106
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    • 2017
  • This study aims to identify the chemical compositions and antioxidant activities of essential oil, extracted from the leaves of Neolitsea aciculata (Blume) Koidz by the hydrodistillation method. To the end, the chemical composition of N. aciculata leaf oil was firstly analyzed through GC/MS. The major constituents of essential oil were found to be: cis-ocimene (11.00%), trans-ocimene (9.65%), elemol (9.15%), ${\beta}$-elemene (8.75%), germacrene-D (7.55%), trans-caryophyllene (5.90%), ${\gamma}$-elemene (5.40%) and ${\tau}$-muurolol (4.95%). Then, the antioxidant potential of the essential oil was evaluated by the methods of total polyphenolic content (TPC) assay, DPPH radical scavenging activity, ABTS radical scavenging activity and ferric reducing antioxidant power (FRAP). It was estimated that the total polyphenolic content of the oil was $136.7{\pm}0.13\;mg\;GAE/g$ and the efficient concentration of the oil required to scavenge 50% DPPH radicals ($EC_{50}$ value) was $639.33\;{\mu}g/m{\ell}$. Also, ABTS radical scavenging activity was identified to be concentration dependent, while the FRAP value was $31.21{\pm}0.12\;{\mu}M$ $FeSO_4{\cdot}7H_2O/g$. Such figures, as a result, suggest that the essential oil extracted from the leaves of N. aciculata has its antioxidant activity, which can serve as significant health functional benefits.

A Study on Design Method Using CNC in Wooden Products (CNC를 이용한 목제품 디자인 기법에 관한 연구)

  • Lee, Young-Choon
    • Journal of the Korea Furniture Society
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    • v.28 no.4
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    • pp.371-379
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    • 2017
  • This study established the scope of the main contents and interpretation of wooden product design using the CNC manufacturing technology as well as the basic concepts of which were defined, accordingly. After coming up with the definition of the CNC wood manufacturing technology from the academic point of view, a design study, using the practical CNC manufacturing technology, was conducted by analyzing and summarizing the contents of each process. In addition, data research and analysis including review on literatures and case studies of existing products were promoted besides design development through application of the design concepts, ergonomics, principle of molding, etc. Ultimately, this study suggested the step-by-step procedure in design drawing, 3D modeling, CAD/CAM data production, CNC manufacturing, and prototype completion together with figures. Through this, the study proposed a standard manufacturing guideline for wood product design using digital manufacturing technology. Base on such efforts, the advantages and points for improvement in product design using CNC manufacturing technology and the future direction of development were forwarded. Meanwhile, a prototype image that was developed through collaborative efforts between the academic circle and field workers was presented to help the case study on the wooden product design technique using CNC.

A Study on the changes and chronological features of bentwood techniques of furniture design - Focus on the representative figures and examples that led the development of the bentwood technique - (가구디자인의 곡목기법 변천과 시대별 특징에 관한 연구 - 곡목 기법의 발전을 이끈 대표적 인물과 사례를 중심으로 -)

  • Kang, Hyun Dae;Kim, Chan Ung
    • Journal of the Korea Furniture Society
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    • v.25 no.1
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    • pp.1-10
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    • 2014
  • The First bentwood chairs in the world, called "winsor chairs" were made by British craftsman in the 17th century. Since then, from the start of NO.14 using solid bentwood by 19th-century German Michael Thonet, furniture making techniques such as Bent knee, Y-leg, X-leg- were developed based on Llaminated bentwood made by Alvar Aalto of Finland in the 20th century. In the 20th century Charles Eames of the United States studied Molded plywood, using plywood to produce a variety of furniture and during the 17~20 century a variety of Bentwood were developed. Coming into the 21st century, American Matthias Pliessnig and Phil Seaton worked with past Bentwood designs, developing Bentwood further by adapting Bentwood's know-how and IT technology. Science and technology evolved and Reholz of Germany developed technology which can mold three-dimensional wood using a new matarial called 3D-veneer, In the past only plastic or metal could be moulded 3 dimensional but now beautiful wood grain patterns can be molded by utilizing this technology. Also this is comparable with the past two-dimensional molding technology. In this Sustainable Design techniauses era, Bentwood fused with IT technology has great potential as a high-tech and eco-friendly techniche.

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