Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Eiichi Obataya"'
Effects of seasoning on the vibrational properties of wood for the soundboards of string instruments
Publikováno v:
The Journal of the Acoustical Society of America. 147(2):998-1005
The vibrational properties of green spruce wood samples were measured intermittently during drying and subsequent conditioning under ambient conditions to clarify the effects of seasoning. After drying, the equilibration of mass and the sound velocit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::88ee3bcaad97a97b49d8144def4883be
https://tsukuba.repo.nii.ac.jp/records/54170
https://tsukuba.repo.nii.ac.jp/records/54170
Publikováno v:
Coatings; Volume 12; Issue 3; Pages: 352
Here, we investigated the wood-whitening phenomenon adjacent to metal components that are commonly observed in Japanese historic architectures. The higher detection of Cu/Zn elements and fine particles of copper/zinc oxalate hydrate in whitened wood
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::069cdaf457073e4259f3acd60e4f74d8
Publikováno v:
Wood Material Science & Engineering. 16:124-131
Sitka spruce wood specimens were heated at 120°C and different relative humidity during heating (RHh) levels for 2–7 days and their equilibrium moisture contents (EMCs) were measured at 25°C and 11...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::83dccb93f29c2862efb2cc4a7d214f1e
https://doi.org/10.1080/17480272.2019.1635642
https://doi.org/10.1080/17480272.2019.1635642
Publikováno v:
Composite Structures. 294:115722
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ffb6c358bef980b97c62f73a3510010
https://doi.org/10.1016/j.compstruct.2022.115722
https://doi.org/10.1016/j.compstruct.2022.115722
Publikováno v:
Wood Science and Technology. 53:151-164
Sitka spruce wood specimens were heated at 120–140 °C and different relative humidity values (RHh), and their specific dynamic Young’s moduli (E′/ρ), mechanical loss tangents (tanδ), and CIELAB color parameters were measured at 25 °C and 60
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19ce65f90bb958b356d9b559084399d2
https://doi.org/10.1007/s00226-018-1069-z
https://doi.org/10.1007/s00226-018-1069-z
Publikováno v:
Wood Science and Technology. 52:1229-1241
Japanese cedar wood specimens were compressed radially using saturated water vapor at 160 °C. Their shape recovery in hot water, cellulose crystallinity, and dynamic viscoelastic properties were measured. The compressed shape of the wood was fixed c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd217f8166c3d0a0de674f511a565dda
https://doi.org/10.1007/s00226-018-1026-x
https://doi.org/10.1007/s00226-018-1026-x
Autor:
Shuoye Chen, Eiichi Obataya
Publikováno v:
Wood Science and Technology. 52:1009-1023
To investigate the mechanism of shape fixation of steam-compressed wood, Japanese cedar wood specimens were compressed radially by 50% using saturated water vapor at 160 °C and observed during shape recovery in different liquids, including water and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76270d9dfd97d1bf6268230e0eae12ca
https://doi.org/10.1007/s00226-018-1018-x
https://doi.org/10.1007/s00226-018-1018-x
Autor:
Takuma Genkawa, Eiichi Obataya, Carmen-Mihaela Popescu, Kaoru Endo, Nanami Zeniya, Miyuki Matsuo-Ueda
Publikováno v:
Forests, Vol 12, Iss 1689, p 1689 (2021)
Forests; Volume 12; Issue 12; Pages: 1689
Forests; Volume 12; Issue 12; Pages: 1689
Sitka spruce wood samples were subjected to different conditions of hydro-thermal treatment by varying the relative humidity (RH) and period of exposure at a constant temperature of 120 °C. Near infrared (NIR) spectroscopy, principal component analy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a7a8207f37bbc7c83bd3010fa2f29bcd
https://doi.org/10.3390/f12121689
https://doi.org/10.3390/f12121689
Autor:
Eiichi Obataya
Publikováno v:
Journal of Cultural Heritage. 27:S63-S69
The reversible and irreversible effects of natural and artificial hydrothermal ageing are reviewed with respect to the hygroscopicity and acoustic properties relevant to the practical quality of wooden musical instruments. Long-term natural ageing re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68fd0eb50b06b4fecc9c129c1c16ac2e
https://doi.org/10.1016/j.culher.2016.02.011
https://doi.org/10.1016/j.culher.2016.02.011
Autor:
Takashi Higashihara, Eiichi Obataya
Publikováno v:
Wood Science and Technology. 51:739-749
Spruce wood specimens were heat-treated in saturated water vapor (steaming) and in the absence of moisture (dry heating) at 120–180 °C, and their wet volumes were measured during alternate wetting and drying cycles. After the first wetting and dry
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9187b703a239ba070d7ae1e571288718
https://doi.org/10.1007/s00226-017-0918-5
https://doi.org/10.1007/s00226-017-0918-5