정유 침투처리를 한 목재의 물리적 성질

정성호,전수경,박병수,정두진,Chong, Song-Ho,Chun, Su-Kyoung,Park, Byung-Su,Jung, Doo-Jin 한국가구학회 2005 한국가구학회지 Vol.16 No.2

The specific gravity of wood treated with the essential oil penetration was higher than that of untreated wood. However, in case of oven-dried wood the difference of treated and untreated products decreased, compared with air-dried wood. The shrinkage of treated wood showed no consistent trend and the difference was trivial. In addition, similar trend was shown in each direction. Compression strength parallel to grain of treated wood was somewhat higher than that of untreated wood and the difference was trivial. The difference in static bending strength was slight and showed no consistent trend. The stage of check for Pinus koraiensis and Populus tomentiglandulosa and Alnus hirsuta was 2 stage and 3 stage, respectively. Deformation stage with no relation to the essential oil treatment was 1 stage for Pinus koraiensis, 2 stage Populus tomentiglandulosa and 3 stage for Ainus hirsuta, respectively, and there was no difference in essential oil penetration.

진해 제덕만 목재 유물의 수종식별

정성호 ( Song Ho Chong ),박병수 ( Byung Su Park ),구자운 ( Ja Oon Koo ),정의도 ( Eui Do Jung ) 한국목재공학회 2004 목재공학 Vol.32 No.5

간벌이 한국산 잣나무의 용재품질에 미치는 영향

정성호 ( Song Ho Chong ),정두진 ( Doo Jin Jung ),박병수 ( Byung Su Park ),전수경 ( Su Kyung Chun ) 한국목재공학회 2003 목재공학 Vol.31 No.2

참가시나무의 목재 성질

정성호 ( Song Ho Chong ),정두진 ( Doo Jin Jung ),박병수 ( Byung Su Park ),이도식 ( Do Sick Lee ),조성택 ( Sung Taek Cho ),서준원 ( Jun Won Seo ),권영한 ( Yeong Han Kwon ) 한국산림과학회 2004 한국산림과학회지 Vol.93 No.3

This study was carried out to investigate the wood properties for efficient utilization of warm temperate tree species of Quercus salicina grown in Korea. Fundamental wood properties in the anatomical, physical, mechanical and chemical characteristics were examined. Quercus salicina is radial-porous, straight grained and fine textured wood. The heartwood is not clearly distinguished from the sapwood. In physical properties, it has a high oven-thy specific gravity of 0.80±0.03, and high shrinkage from green to air-dried condition of 4.42±0.60% in radial and 10.31±0.50% in tangential direction. Mechanical properties determined are strong with the MOR of 1,170±l44kgf/㎠, and tensile strength parallel to grain of 1,851±236kgf/㎠ and shear strength of 182±10kgf/㎠. Also, this wood has high extractive contents : 10.64% for cold and 12.57% for hot water.

간벌강도에 따른 낙엽송의 휨 및 종압축강도성능

정성호 ( Song Ho Chong ),원경록 ( Kyung Rok Won ),홍남의 ( Nam Euy Hong ),박병수 ( Byung Su Park ),이경재 ( Kyung Jae Lee ),변희섭 ( Hee Seop Byeon ) 한국목재공학회 2014 목재공학 Vol.42 No.4

우리나라의 중요한 조림 수종 중에서 낙엽송을 대상으로 하여, 간벌실시에 따른 물리·역학적 성질을 비교 평가함으로써 간벌 실시가 목재의 재질에 미치는 영향과 양질재 생산 및 목재의 효율적 이용을 위한 연구결과는 다음과 같다. 간벌정도에 따른 시료는 무간벌, 약도간벌, 강도간벌을 실시한 광릉시험림에서 벌채하여 사용하였다. 간벌 정도에 따른 평균 만재율은 무간벌 < 약도간벌 < 강도간벌의 경향이었고 평균 연륜폭은 무간벌 < 약도간벌 또는 강도간벌의 경향이었다. 간벌 정도에 따른 평균 휨강도는 무간벌 > 약도간벌 >강도간벌의 경향이었고 간벌 정도에 따른 평균 압축강도는 무간벌 > 약도간벌 >강도간벌의 경향이었다. 이러한 결과로 낙엽송은 간벌에 의하여 휨 및 종압축강도가 감소하는 경향이었다. The purpose of this study was to determine the effects of plantation thinning on physical and mechanical properties of Larix kaempferi. Tree samples were obtained from unthinned, moderately, heavily thinned plantations where located in Kwangryung forest research stand. The effects of different thinning methods on the bending and parallel to grain compressive strengths of Larix kaempferi were explored. Average latewood ratio with various thinning treatments revealed the trend of unthinning < moderate thinning < heavy thinning treatment. Average annual ring width with various thinning treatments showed the trend of unthinning < moderate thinning or heavy thinning treatment. Average bending and parallel to grain compressive strengths with various thinning treatments revealed the trend of unthinning > moderate thinning > heavy thinning treatment. This indicates that thinning treatment reduces average bending and parallel to grain compressive strength properties.

탄화보드를 이용한 서각작품 제작

박상범 ( Sang Bum Park ),정성호 ( Song Ho Chong ),변희섭 ( Hee Seop Byeon ),류현수 ( Hyun Soo Ryu ) 한국목재공학회 2010 목재공학 Vol.38 No.3

중밀도섬유판(MDF)에 글씨나 그림을 새김질한 목판을 제조하고, 이를 탄화하여 서각작품을 제작하는 방법을 개발하였다. 섬유판의 탄화에 따른 외형적 및 조직학적 변화를 검토하고 제작된 탄화보드 서각작품에 대한 미학적 특징을 고찰하였다. 서각한 MDF를 850°C에서 탄화한 결과, 할열이나 뒤틀림은 관찰되지 않았으며, 치수는 가로 21.8%, 세로 18.8%, 두께 43.5% 줄어들었고, 중량은 69.2%, 밀도는 14.8% 감소하였다. 탄화보드의 전자 현미경에 의한 관찰 결과, 당초 섬유의 표면과 벽공을 둘러싸고 있던 접착제가 탄화되면서 목질섬유의 표면이 매끄럽게 변하고 벽공이 개열되며 섬유의 크기가 균일화되고 조직이 치밀화되는 현상을 나타내었다. 수작업에 의한 서각기법과 무할열 탄화기법의 융합에 의해 새로운 탄화보드 서각작품의 제작이 가능하였다. 탄화보드 서각작품은 목탄의 기능성과 서각의 아름다움을 부여하는 새로운 친환경 예술영역의 한 분야로서 이용될 수 있을 것이다. This study was focused to make a wooden plate that is engraved with writings or pictures on the medium density fiberboard (MDF), and then to produce a calligraphy-carving artwork by carbonization of the carved MDF. The external appearances and anatomical changes were investigated on the carbonized MDF and aesthetic characteristics was also discussed. No split and no twist were found after the carbonization (at 850°C) of the calligraphy-encarved MDF, shrinkages of the MDF were observed with portions of 21.8% in length, 18.8% in width and 43.5% in thickness, and 69.2% of weight loss with density decrease of 14.8% were observed as well. From the observation of the carbonized board by a scanning electron microscope, specific phenomena were found: the adhesives, surrounding the fiber`s surface and pits, were carbonized, the woody fibers were changed smoothly, the pits were opened, the fiber`s size was uniformized, and the organization was compacted. By the combination of handmade calligraphy-woodcarving and crack-free carbonizing methods, it was able to find a new method for manufacture carbonized calligraphy-woodcarving artwork. It is concluded that the calligraphy-woodcarving artwork using carbonized board can be a new access for the eco-friendly art that has the advantage of the functionality of charcoal and the aesthetic of calligraphy-woodcarving simultaneously.

침전,훈증처리 소나무재선충병 피해목의 휨강도성능 및 경도에 관한 연구

윤석락 ( Seok Lak Yun ),정성호 ( Song Ho Chong ),서동진 ( Dong Jin Seo ),원경록 ( Kyung Rok Won ),박한민 ( Han Min Park ),김종갑 ( Jong Gab Kim ),변희섭 ( Hee Seep Byeon ) 한국목재공학회 2012 목재공학 Vol.40 No.1

This study used pine wilt disease damaged trees as raw materials The damaged woods were subjected to soaking treatment using wood vinegar, nematicide and sea water, Fumigated treatment using fumigation, and the bending strength and hardness of the timber were measured at different points of time after the treatment. In soaking treatment, the highest bending strength was obtained from wood vinegar (100 fold dilution)-soaked specimens of Pinus densiflora and the nematicide-soaked specimens of Anus tbunbergii. The highest hardness in cross section was gained from the nematicide-soaked specimens of Pin us densiflora and Anus thunbergi4 the highest hardness in radial section was obtained from the nematicide-soaked specimens of Pin us densiflora and wood vinegar (100 Fold dilution)-soaked specimens of Anus thunbergi4 and the highest hardness in tangential section was obtained from the nematicide-soaked specimens of Antis densiflora and Pinus thunbergii and there were not significantly different among the treatments. When fumigated treatment was applied, bending strength, hardness was somewhat lower in the control but were not significantly different between the treatments.

HSI 색상모델을 이용한 마루판 무늬목의 색상분류에 관한 연구(1)

서준원 ( Jun Won Seo ),박병수 ( Byung Su Park ),정성호 ( Song Ho Chong ),박헌 ( Heon Park ) 한국목재공학회 2005 목재공학 Vol.33 No.4

Delphi와 중요도-만족도 분석을 적용한 산림치유 직무교육 과정 개발

신경희(Kyoung Hi Shin),신원섭(Won Sop Shin),김현식(Hyun-Sik Kim),연평식(Poung Sik Yeoun),정성호(Song-Ho Chong),이효은(Hyo Eun Lee) 한국산림휴양학회 2011 한국산림휴양학회지 Vol.15 No.4

본 연구는 산림인력개발원에서 1주일 기간으로 신설한 산림치유 교육과정의 교육과목 개발을 위해 수행하였다. 먼저, 다양한 방법으로 136개의 교육과목을 수집한 다음 전문가 집단토론을 통하여 34개를 추출하였고, 이어 13인의 델파이 전문가 설문조사를 통하여 교육과목을 22개로 축소 조정하였으며, 이를 191명의 산림관련 공무원 등을 대상으로 산림치유과정의 교육과목으로서 타당성을 분석하여 12개의 교육과목을 선정하였다. 산림인력개발원에서는 이를 토대로 편성한 산림치유 교육과정을 32명의 공무원을 대상으로 운영하였으며, I-P분석으로 평가를 실시하여 교육과목에 있어서 우선시정 필요한 과목, 지속적 노력이 필요한 과목, 저 우선순위 과목, 과잉노력을 지양할 과목으로 구분하였다. 본 연구의 결과는 차기 교육과정에 환류하여 교육만족도 제고 및 성과향상에 기여할 수 있을 것이며, 본 연구 의 방법론은 신규 교육과정을 개설할 때 교육과목 선정과 교육운영 평가에 활용할 수 있을 것이다. The overall purpose of this study was to develop curriculum in forest therapy education program as a job training course in Forest Human Resources Development Institute. Based on literature review and consultation with professionals, 136 subjects were collected. Using Delphi method with 13 professionals, 22 subjects were selected as candidate subjects. Then, final 12 subjects were selected based on survey with 191 officials in various positions. The forest therapy education program was performed in the Forest Human Resources Development Institute for 32 officials. Using Importance-Performance Analysis (IPA), the subjects were classified and positioned in four dimensional grids.

남부지역 졸참나무의 임분 특성에 따른 물리,역학적 특성

원경록 ( Kyung Rok Won ),홍남의 ( Nam Euy Hong ),이광수 ( Kwang Soo Lee ),정수영 ( Soo Yung Jung ),유병오 ( Byung Oh Yoo ),박용배 ( Young Bae Park ),정성호 ( Song Ho Chong ),변희섭 ( Hee Seop Byeon ) 한국목재공학회 2014 목재공학 Vol.42 No.6

목재의 조직, 물리, 역학적 특성은 토양조건과 기후변화 등의 환경적 인자에 의해서도 바뀌게 됨으로 남부 세 지역의 임분 특성이 목재의 재질특성에 미치는 영향과 지역별 조직, 물리, 역학적 특성 등을 비교 검토하였다. 경상도, 전라도, 제주도의 졸참나무임지에 대해 임분 특성과 목재특성을 평가 분석하였는데 이들 간에는 대부분 높은 상관관계가 나타났다. 남부지역의 졸참나무는 온대에서 난대로 기후가 변화하는 난대 지역의 산림자원으로 본 목재재질특성 분석결과 유용한 산림자원으로 활용할 수 있을 것으로 생각된다. Wood properties are affected by environmental factors such as soil and climate change. There were close relationships between mechanical properties and stand characteristics for Quercus serrata stands in Gyeongsangnam-doProvince, Jeollanam-do Province and Je-ju island. Both compression and shear strengths of woods showed a negative correlation with diameter at breast height (DBH) and the number of tree per hector, while they are positively related with with tree age, altitude, and drainage. The annual ring width was also negatively correlated with tree age, altitude, drainage, DBH, and tree height. However, anatomical characteristics of wood did not show much variation depending on the provincial regions. These results brought a conclusion that Quercus serrata in southern region could be usefulforest resources for the utilization of wood.