Papers - TSUCHIKAWA, Satoru

Application of NIR spectroscopy to wood products

Tsuchikawa S.; Fujimoto, T.

Proceedings of 17th International Nondestructive Testing and Evaluation of Wood Symposium     page： 665-671   2011

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Language：English  

Application of NIR spectroscopy to wood products

Tsuchikawa S, Fujimoto, T

Proceedings of 17th International Nondestructive Testing and Evaluation of Wood Symposium     page： 665-671   2011

Optical characteristics of wood investigated by time-of-flight near infrared spectroscopy

Kurata, Y, Fujimoto, T, Tsuchikawa S

Holzforschung   Vol. 65   page： 389-395   2011

Application of NIR spectroscopy to wood products

Tsuchikawa S, Fujimoto, T

Proceedings of 17th International Nondestructive Testing and Evaluation of Wood Symposium     page： 665-671   2011

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Language：English   Publishing type：Research paper (scientific journal)  

Application of NIR spectroscopy to wood products

Tsuchikawa S., Fujimoto, T.

Proceedings of 17th International Nondestructive Testing and Evaluation of Wood Symposium     page： 665-671   2011

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Language：English   Publishing type：Research paper (scientific journal)  

Feasibility of near-infrared spectroscopy for online multiple trait assessment of sawn lumber

Fujimoto Takaaki, Kurata Yohei, Matsumoto Kazushige, TSUCHIKAWA Satoru

Journal of wood science   Vol. 56 ( 6 ) page： 452 - 459   2010.12

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Publisher：Springer  

Feasibility of near-infrared spectroscopy for online multiple trait assessment of sawn lumber Reviewed

FUJIMOTO Takaaki, KURATA Yohei, MATSUMOTO Kazushige, TSUCHIKAWA Satoru

Journal of wood science   Vol. 56 ( 6 ) page： 452 - 459   2010.12

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Language：English   Publishing type：Research paper (scientific journal)  

CiNii Research

Feasibility of near-infrared spectroscopy for online multiple trait assessment of sawn lumber Reviewed

Fujimoto Takaaki, Kurata Yohei, Matsumoto Kazushige, Tsuchikawa Satoru

JOURNAL OF WOOD SCIENCE   Vol. 56 ( 6 ) page： 452 - 459   2010.12

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Journal of Wood Science  

Near-infrared (NIR) spectroscopy coupled with multivariate analysis was applied to estimate multiple traits of sawn lumber. The effects of the lumber conveying speed (LCS) and measurement resolution of spectra (MRS) on the calibrations were examined. NIR spectra ranging from 1300 to 2300 nm were acquired at LCSs of 10, 20, and 30 m/min and at MRSs of 2, 4, and 16 nm. Prediction models of bending strength (Fb), modulus of elasticity in bending tests (Eb), dynamic modulus of elasticity (Efr), and wood density (DEN) were developed using partial least-squares (PLS) analysis. LCS and MRS did not significantly influence the calibration performance for any wood property. The regression coefficients also showed no clear differences for any of the conditions. This indicates that the important explanatory variables included in the models are not greatly influenced by these measurement conditions. PLS2 analysis results, when presented graphically, allowed easy interpretation of the relationships between wood mechanical properties and chemical components, e. g., bending strength and stiffness were mainly related to polysaccharides cellulose and hemicellulose. NIR spectroscopy has considerable potential for online grading of sawn lumber, despite the harsh measurement conditions. © 2010 The Japan Wood Research Society.

DOI： 10.1007/s10086-010-1122-5

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Enhanced on-line stress grading of sawn lumber using near infrared spectroscopy Reviewed

Fujimoto T., Matsumoto K., Kurata Y., Tsuchikawa S.

11th World Conference on Timber Engineering 2010, WCTE 2010   Vol. 2   page： 1538 - 1542   2010.12

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：11th World Conference on Timber Engineering 2010, WCTE 2010  

Near-infrared (NIR) spectroscopy, coupled with multivariate analysis, has been used to predict the wood properties of sawn lumber, whose diffuse reflection spectra were acquired under moving conditions (30 m/min). Models predicting for bending strength (Fb), modulus of elasticity in bending (Eb), dynamic modulus of elasticity (Efr), air-dried wood density (DEN), and moisture content (MC) were developed using the partial least squares (PLS) analysis. For all wood properties, calibration models showed relative strong relationships between laboratory-measured and NIR-predicted values with coefficients of determination ranging from 0.55 to 0.80. The vector of regression coefficient revealed the important explanatory variables included in each model. It was concluded that NIR spectroscopy could be applied to on-line grading of lumber quality.

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Enhanced on-line stress grading of sawn lumber using near infrared spectroscopy Reviewed

Fujimoto T, Matsumoto K, Kurata Y, Tsuchikawa S

11th World Conference on Timber Engineering 2010, WCTE 2010   Vol. 2   page： 1538 - 1542   2010.12

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：11th World Conference on Timber Engineering 2010, WCTE 2010  

Near-infrared (NIR) spectroscopy, coupled with multivariate analysis, has been used to predict the wood properties of sawn lumber, whose diffuse reflection spectra were acquired under moving conditions (30 m/min). Models predicting for bending strength (Fb), modulus of elasticity in bending (Eb), dynamic modulus of elasticity (Efr), air-dried wood density (DEN), and moisture content (MC) were developed using the partial least squares (PLS) analysis. For all wood properties, calibration models showed relative strong relationships between laboratory-measured and NIR-predicted values with coefficients of determination ranging from 0.55 to 0.80. The vector of regression coefficient revealed the important explanatory variables included in each model. It was concluded that NIR spectroscopy could be applied to on-line grading of lumber quality.

Enhanced on-line stress grading of sawn lumber using near infrared spectroscopy Reviewed

Fujimoto T, Matsumoto K, Kurata Y, Tsuchikawa S

11th World Conference on Timber Engineering 2010, WCTE 2010   Vol. 2   page： 1538 - 1542   2010.12

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：11th World Conference on Timber Engineering 2010, WCTE 2010  

Near-infrared (NIR) spectroscopy, coupled with multivariate analysis, has been used to predict the wood properties of sawn lumber, whose diffuse reflection spectra were acquired under moving conditions (30 m/min). Models predicting for bending strength (Fb), modulus of elasticity in bending (Eb), dynamic modulus of elasticity (Efr), air-dried wood density (DEN), and moisture content (MC) were developed using the partial least squares (PLS) analysis. For all wood properties, calibration models showed relative strong relationships between laboratory-measured and NIR-predicted values with coefficients of determination ranging from 0.55 to 0.80. The vector of regression coefficient revealed the important explanatory variables included in each model. It was concluded that NIR spectroscopy could be applied to on-line grading of lumber quality.

Enhanced on-line stress grading of sawn lumber using near infrared spectroscopy Reviewed

Fujimoto T, Matsumoto K, Kurata Y, Tsuchikawa S

11th World Conference on Timber Engineering 2010, WCTE 2010   Vol. 2   page： 1538 - 1542   2010.12

　More details

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：11th World Conference on Timber Engineering 2010, WCTE 2010  

Near-infrared (NIR) spectroscopy, coupled with multivariate analysis, has been used to predict the wood properties of sawn lumber, whose diffuse reflection spectra were acquired under moving conditions (30 m/min). Models predicting for bending strength (Fb), modulus of elasticity in bending (Eb), dynamic modulus of elasticity (Efr), air-dried wood density (DEN), and moisture content (MC) were developed using the partial least squares (PLS) analysis. For all wood properties, calibration models showed relative strong relationships between laboratory-measured and NIR-predicted values with coefficients of determination ranging from 0.55 to 0.80. The vector of regression coefficient revealed the important explanatory variables included in each model. It was concluded that NIR spectroscopy could be applied to on-line grading of lumber quality.

Enhanced on-line stress grading of sawn lumber using near infrared spectroscopy Reviewed

Fujimoto T., Matsumoto K., Kurata Y., Tsuchikawa S.

11th World Conference on Timber Engineering 2010, WCTE 2010   Vol. 2   page： 1538 - 1542   2010.12

　More details

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：11th World Conference on Timber Engineering 2010, WCTE 2010  

Near-infrared (NIR) spectroscopy, coupled with multivariate analysis, has been used to predict the wood properties of sawn lumber, whose diffuse reflection spectra were acquired under moving conditions (30 m/min). Models predicting for bending strength (Fb), modulus of elasticity in bending (Eb), dynamic modulus of elasticity (Efr), air-dried wood density (DEN), and moisture content (MC) were developed using the partial least squares (PLS) analysis. For all wood properties, calibration models showed relative strong relationships between laboratory-measured and NIR-predicted values with coefficients of determination ranging from 0.55 to 0.80. The vector of regression coefficient revealed the important explanatory variables included in each model. It was concluded that NIR spectroscopy could be applied to on-line grading of lumber quality.

Enhanced on-line stress grading of sawn lumber using near infrared spectroscopy Reviewed

Fujimoto T, Matsumoto K, Kurata Y, Tsuchikawa S

11th World Conference on Timber Engineering 2010, WCTE 2010   Vol. 2   page： 1538 - 1542   2010.12

　More details

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：11th World Conference on Timber Engineering 2010, WCTE 2010  

Near-infrared (NIR) spectroscopy, coupled with multivariate analysis, has been used to predict the wood properties of sawn lumber, whose diffuse reflection spectra were acquired under moving conditions (30 m/min). Models predicting for bending strength (Fb), modulus of elasticity in bending (Eb), dynamic modulus of elasticity (Efr), air-dried wood density (DEN), and moisture content (MC) were developed using the partial least squares (PLS) analysis. For all wood properties, calibration models showed relative strong relationships between laboratory-measured and NIR-predicted values with coefficients of determination ranging from 0.55 to 0.80. The vector of regression coefficient revealed the important explanatory variables included in each model. It was concluded that NIR spectroscopy could be applied to on-line grading of lumber quality.

Enhanced on-line stress grading of sawn lumber using near infrared spectroscopy Reviewed

Fujimoto T, Matsumoto K, Kurata Y, Tsuchikawa S

11th World Conference on Timber Engineering 2010, WCTE 2010   Vol. 2   page： 1538 - 1542   2010.12

　More details

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：11th World Conference on Timber Engineering 2010, WCTE 2010  

Near-infrared (NIR) spectroscopy, coupled with multivariate analysis, has been used to predict the wood properties of sawn lumber, whose diffuse reflection spectra were acquired under moving conditions (30 m/min). Models predicting for bending strength (Fb), modulus of elasticity in bending (Eb), dynamic modulus of elasticity (Efr), air-dried wood density (DEN), and moisture content (MC) were developed using the partial least squares (PLS) analysis. For all wood properties, calibration models showed relative strong relationships between laboratory-measured and NIR-predicted values with coefficients of determination ranging from 0.55 to 0.80. The vector of regression coefficient revealed the important explanatory variables included in each model. It was concluded that NIR spectroscopy could be applied to on-line grading of lumber quality.

Enhanced on-line stress grading of sawn lumber using near infrared spectroscopy Reviewed

Fujimoto T, Matsumoto K, Kurata Y, Tsuchikawa S

11th World Conference on Timber Engineering 2010, WCTE 2010   Vol. 2   page： 1538 - 1542   2010.12

　More details

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：11th World Conference on Timber Engineering 2010, WCTE 2010  

Near-infrared (NIR) spectroscopy, coupled with multivariate analysis, has been used to predict the wood properties of sawn lumber, whose diffuse reflection spectra were acquired under moving conditions (30 m/min). Models predicting for bending strength (Fb), modulus of elasticity in bending (Eb), dynamic modulus of elasticity (Efr), air-dried wood density (DEN), and moisture content (MC) were developed using the partial least squares (PLS) analysis. For all wood properties, calibration models showed relative strong relationships between laboratory-measured and NIR-predicted values with coefficients of determination ranging from 0.55 to 0.80. The vector of regression coefficient revealed the important explanatory variables included in each model. It was concluded that NIR spectroscopy could be applied to on-line grading of lumber quality.

Difference of the Crystal Structure of Cellulose in Wood after Hydrothermal and Aging Degradation: A NIR Spectroscopy and XRD Study Reviewed

Inagaki Tetsuya, Siesler Heinz W., Mitsui Katsuya, Tsuchikawa Satoru

BIOMACROMOLECULES   Vol. 11 ( 9 ) page： 2300 - 2305   2010.9

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Biomacromolecules  

The change of crystalline structure in hydrothermally treated hinoki wood was investigated by means of Fourier-transform near-infrared spectroscopy in combination with a deuterium exchange method and X-ray diffraction. The results were compared with analogous data of dry-exposed archeological wood taken from an old wooden temple. Although the decomposition of the amorphous regions in cellulose and hemicelluloses, which corresponds to an increase of the degree of crystallinity, was observed for both, archeologically and hydrothermally treated wood, the increase of crystallite thickness was confirmed only for hydrothermally treated wood. The increase of the average size of crystallites corresponds well to the measured decrease of the deuteration accessibility of the crystalline regions. As the accessibility of the crystalline regions decreased for both, D2O and t-butanol, it is assumed that due to the expansion of the crystalline domains by hydrothermal treatment several elementary fibrils are arranged at distances below 0.3 nm. © 2010 American Chemical Society.

DOI： 10.1021/bm100403y

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PubMed

Effect of Crosscutting Crooked Sugi (Cryptomeria japonica) Logs on Sawing Yield and Quality of Sawn Lumber Reviewed

Ikami Y., Matsumura Y., Murata K., Tsuchikawa S.

FOREST PRODUCTS JOURNAL   Vol. 60 ( 3 ) page： 244 - 248   2010.5

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Language：English   Publishing type：Research paper (scientific journal)  

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Effect of Crosscutting Crooked Sugi (Cryptomeria japonica) Logs on Sawing Yield and Quality of Sawn Lumber Reviewed

Y. Ikami, Y. Matsumura, K. Murata, S. Tsuchikawa

FOREST PRODUCTS JOURNAL   Vol. 60 ( 3 ) page： 244 - 248   2010.5

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Authorship：Last author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：FOREST PRODUCTS SOC  

The objective of this study was to develop an efficient method for using crooked sugi (Cryptomeria japonica D. Don) logs by crosscutting the logs prior to sawing. We investigated the effect of crosscutting crooked logs on the sawing yield and the quality of sawn lumber and proposed an effective processing method. The sawing yield and the quality of sawn lumber were improved by crosscutting the logs one time. An economic analysis based on the processing intensity required for crooked logs, subjected to one-time crosscutting, and crook-free medium-quality logs was conducted. When the price of sawn lumber obtained from the crooked logs was equal to that of medium-quality logs, the net revenue obtained from crooked logs became nearly equal to that of medium-quality logs. The results demonstrated that the crooked logs could be used effectively by one-time crosscutting.

Web of Science

Effect of crosscutting crooked sugi (Cryptomeria japonica) logs on sawing yield and quality of sawn lumber Reviewed

Ikami Y., Matsumura Y., Murata K., Tsuchikawa S.

Forest Products Journal   Vol. 60 ( 3 ) page： 244 - 248   2010.5

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Forest Products Journal  

The objective of this study was to develop an efficient method for using crooked sugi (Cryptomeria japonica D. Don) logs by crosscutting the logs prior to sawing. We investigated the effect of crosscutting crooked logs on the sawing yield and the quality of sawn lumber and proposed an effective processing method. The sawing yield and the quality of sawn lumber were improved by crosscutting the logs one time. An economic analysis based on the processing intensity required for crooked logs, subjected to one-time crosscutting, and crook-free medium-quality logs was conducted. When the price of sawn lumber obtained from the crooked logs was equal to that of medium-quality logs, the net revenue obtained from crooked logs became nearly equal to that of medium-quality logs. The results demonstrated that the crooked logs could be used effectively by onetime crosscutting. © Forest Products Society 2010.

DOI： 10.13073/0015-7473-60.3.244

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