Papers - TSUCHIKAWA, Satoru

Dynamic behavior of wood chemical components under drying process measured by near-infrared spectroscopy Reviewed

Sugii, S.; Fujimoto, T.; Tsutsumi, H.; Inagaki, T.; Tsuchikawa, S.

Journal of Near Infrared Spectroscopy   Vol. 25 ( 6 ) page： 400-406   2017

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

Temperature dependence of wood photodegradation monitored by infrared spectroscopy Reviewed

Varga, D., Tolvaj, L.; Tsuchikawa, S.; Bejoc, L.; Prekleta, E.

Journal of Photochemistry and Photobiology A: Chemistry   Vol. 348   page： 219-225   2017

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Segregating wood wastes by repetitive principal component analysis of near infrared spectra Reviewed

Kobori, H.; Higa, S.; Tsuchikawa, S., Kojima, Y.; Suzuki, S.

Journal of Near Infrared Spectroscopy   Vol. 25 ( 3 ) page： 180-187   2017

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The effect of path length, light intensity and co-added time on the detection limit associated with NIR spectroscopy of potassium hydrogen phthalate in aqueous solution Reviewed

Inagaki, T.; Watanabe, T.; Tsuchikawa S.

PLOS ONE     page： https://doi.org/10.1371/journal.pone.0176920   2017

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DOI： https://doi.org/10.1371/journal.pone.0176920

Classification of mung bean seeds for sprout production using near-infrared spectroscopy and hyperspectral imaging Reviewed

Phuangsombut, K.; Terdwongworakul, A.; Suttiwijitpukdee, N.; Phuangsombut A.; Tsuchikawa S.; Inagaki T.; Ma T.

Thai Society of Agricultural Engineering Journal   Vol. 23 ( 1 ) page： 23-29   2017

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The effect of path length, light intensity and co-added time on the detection limit associated with NIR spectroscopy of potassium hydrogen phthalate in aqueous solution Reviewed

Inagaki Tetsuya, Watanabe Tomoko, Tsuchikawa Satoru

PLOS ONE   Vol. 12 ( 5 ) page： e0176920   2017

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

DOI： 10.1371/journal.pone.0176920

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Classification of mung bean seeds for sprout production using near-infrared spectroscopy and hyperspectral imaging Reviewed

Phuangsombut, K., Terdwongworakul, A., Suttiwijitpukdee, N., Phuangsombut A., Tsuchikawa S., Inagaki T., Ma T.

Thai Society of Agricultural Engineering Journal   Vol. 23 ( 1 ) page： 23-29   2017

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Development of Multiple Evaluation Method of Wood Pulp in Paper by Near Infrared Spectroscopy

Kawabe Chika, Fukasawa Hiroyuki, Inagaki Tetsuya, Tsuchikawa Satoru

JAPAN TAPPI JOURNAL   Vol. 71 ( 3 ) page： 326 - 334   2017

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：JAPAN TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY  

<p>Near infrared spectroscopy （NIRS） has been applied in some fields such as medicines, chemicals and ag ricultural products. In this report, NIRS was applied to paper sheets to analyze the contained pulp qualita tively and quantitatively. LBKP, NBKP, CTMP and others could be classified by principal component analysis （PCA） for NIR spectra. The blend ratio of LBKP, NBKP and CTMP in the both mixtures of LBKP and CTMP, and NBKP and CTMP could be determined respectively by partial least squares regression （PLSR）for NIR spectra within the coefficient of determination （R² value） of 0.98. Furthermore, the ratio of mixture of KP and another pulp on the paper could be determined somewhat correctly even if we do not know what kinds of pulp were contained. NIRS could also be used to estimate the drainability of LBKP; that is, the pre dicted value was very close to the measured value. NIRS was also applied to evaluate the degree of degrada tion of pulp. PCA for NIR spectra of LBKP has revealed the linear relationships between recycled times and score.</p><p>The NIR technique is faster than staining techniques, and does not require special training. If we could have tested a wider variety of samples, if we had more time, and if we could have optimized the analysis con dition, it would be possible to estimate more precisely.</p>

DOI： 10.2524/jtappij.71.326

CiNii Research

Dynamic behavior of wood chemical components under drying process measured by near-infrared spectroscopy

Sugii, S, Fujimoto, T, Tsutsumi, H, Inagaki, T, Tsuchikawa, S

Journal of Near Infrared Spectroscopy   Vol. 25 ( 6 ) page： 400-406   2017

Segregating wood wastes by repetitive principal component analysis of near infrared spectra

Kobori, H, Higa, S, Tsuchikawa, S, Kojima, Y, Suzuki, S

Journal of Near Infrared Spectroscopy   Vol. 25 ( 3 ) page： 180-187   2017

Development of Multiple Evaluation Method of Wood Pulp in Paper by Near Infrared Spectroscopy

JAPAN TAPPI JOURNAL   Vol. 71 ( 3 ) page： 318 - 325   2017

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：JAPAN TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY  

DOI： 10.2524/jtappij.1603

CiNii Research

Estimation of wood density, moisture content and fiber orientation by THz time domain spectroscopy Reviewed

Inagaki T., Kashima M., Tsuchikawa S.

28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector     page： 3 - 6   2017

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector  

Terahertz (THz) radiation has the potential to be a useful tool for sensing and imaging of wood because wood is relatively transparent at these frequencies (below about 1 THz). In this study, demonstration of simultaneous prediction of solid wood density, moisture content and fiber orientation, all of which are critical in manufacturing operations, of 14 species including softwood and hard wood was accomplished using terahertz time-domain spectroscopy (THz-TDS). THz measurements of wood at various moisture contents were taken for 19 orientations of the THz field (0-180o with 10o step) with respect to the visible grain. The real part of refractive index value and absorption cosfficient had strong correlation with density and moisture content of the wood. A strong correlation between measured and predicted values for density and moisture content were observed. The possibility for the estimation of fiber orientation using the birefringence property of wood were shown.

Scopus

Estimation of wood density, moisture content and fiber orientation by THz time domain spectroscopy Reviewed

Inagaki T, Kashima M, Tsuchikawa S

28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector     page： 3 - 6   2017

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector  

Terahertz (THz) radiation has the potential to be a useful tool for sensing and imaging of wood because wood is relatively transparent at these frequencies (below about 1 THz). In this study, demonstration of simultaneous prediction of solid wood density, moisture content and fiber orientation, all of which are critical in manufacturing operations, of 14 species including softwood and hard wood was accomplished using terahertz time-domain spectroscopy (THz-TDS). THz measurements of wood at various moisture contents were taken for 19 orientations of the THz field (0-180o with 10o step) with respect to the visible grain. The real part of refractive index value and absorption cosfficient had strong correlation with density and moisture content of the wood. A strong correlation between measured and predicted values for density and moisture content were observed. The possibility for the estimation of fiber orientation using the birefringence property of wood were shown.

Estimation of wood density, moisture content and fiber orientation by THz time domain spectroscopy Reviewed

Inagaki T, Kashima M, Tsuchikawa S

28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector     page： 3 - 6   2017

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector  

Terahertz (THz) radiation has the potential to be a useful tool for sensing and imaging of wood because wood is relatively transparent at these frequencies (below about 1 THz). In this study, demonstration of simultaneous prediction of solid wood density, moisture content and fiber orientation, all of which are critical in manufacturing operations, of 14 species including softwood and hard wood was accomplished using terahertz time-domain spectroscopy (THz-TDS). THz measurements of wood at various moisture contents were taken for 19 orientations of the THz field (0-180o with 10o step) with respect to the visible grain. The real part of refractive index value and absorption cosfficient had strong correlation with density and moisture content of the wood. A strong correlation between measured and predicted values for density and moisture content were observed. The possibility for the estimation of fiber orientation using the birefringence property of wood were shown.

Estimation of wood density, moisture content and fiber orientation by THz time domain spectroscopy Reviewed

Inagaki T, Kashima M, Tsuchikawa S

28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector     page： 3 - 6   2017

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Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector  

Terahertz (THz) radiation has the potential to be a useful tool for sensing and imaging of wood because wood is relatively transparent at these frequencies (below about 1 THz). In this study, demonstration of simultaneous prediction of solid wood density, moisture content and fiber orientation, all of which are critical in manufacturing operations, of 14 species including softwood and hard wood was accomplished using terahertz time-domain spectroscopy (THz-TDS). THz measurements of wood at various moisture contents were taken for 19 orientations of the THz field (0-180o with 10o step) with respect to the visible grain. The real part of refractive index value and absorption cosfficient had strong correlation with density and moisture content of the wood. A strong correlation between measured and predicted values for density and moisture content were observed. The possibility for the estimation of fiber orientation using the birefringence property of wood were shown.

Estimation of wood density, moisture content and fiber orientation by THz time domain spectroscopy Reviewed

Inagaki T, Kashima M, Tsuchikawa S

28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector     page： 3 - 6   2017

　More details

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector  

Terahertz (THz) radiation has the potential to be a useful tool for sensing and imaging of wood because wood is relatively transparent at these frequencies (below about 1 THz). In this study, demonstration of simultaneous prediction of solid wood density, moisture content and fiber orientation, all of which are critical in manufacturing operations, of 14 species including softwood and hard wood was accomplished using terahertz time-domain spectroscopy (THz-TDS). THz measurements of wood at various moisture contents were taken for 19 orientations of the THz field (0-180o with 10o step) with respect to the visible grain. The real part of refractive index value and absorption cosfficient had strong correlation with density and moisture content of the wood. A strong correlation between measured and predicted values for density and moisture content were observed. The possibility for the estimation of fiber orientation using the birefringence property of wood were shown.

Estimation of wood density, moisture content and fiber orientation by THz time domain spectroscopy Reviewed

Inagaki T., Kashima M., Tsuchikawa S.

28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector     page： 3 - 6   2017

　More details

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector  

Terahertz (THz) radiation has the potential to be a useful tool for sensing and imaging of wood because wood is relatively transparent at these frequencies (below about 1 THz). In this study, demonstration of simultaneous prediction of solid wood density, moisture content and fiber orientation, all of which are critical in manufacturing operations, of 14 species including softwood and hard wood was accomplished using terahertz time-domain spectroscopy (THz-TDS). THz measurements of wood at various moisture contents were taken for 19 orientations of the THz field (0-180o with 10o step) with respect to the visible grain. The real part of refractive index value and absorption cosfficient had strong correlation with density and moisture content of the wood. A strong correlation between measured and predicted values for density and moisture content were observed. The possibility for the estimation of fiber orientation using the birefringence property of wood were shown.

Estimation of wood density, moisture content and fiber orientation by THz time domain spectroscopy Reviewed

Inagaki T, Kashima M, Tsuchikawa S

28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector     page： 3 - 6   2017

　More details

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector  

Terahertz (THz) radiation has the potential to be a useful tool for sensing and imaging of wood because wood is relatively transparent at these frequencies (below about 1 THz). In this study, demonstration of simultaneous prediction of solid wood density, moisture content and fiber orientation, all of which are critical in manufacturing operations, of 14 species including softwood and hard wood was accomplished using terahertz time-domain spectroscopy (THz-TDS). THz measurements of wood at various moisture contents were taken for 19 orientations of the THz field (0-180o with 10o step) with respect to the visible grain. The real part of refractive index value and absorption cosfficient had strong correlation with density and moisture content of the wood. A strong correlation between measured and predicted values for density and moisture content were observed. The possibility for the estimation of fiber orientation using the birefringence property of wood were shown.

Estimation of wood density, moisture content and fiber orientation by THz time domain spectroscopy Reviewed

Inagaki T, Kashima M, Tsuchikawa S

28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector     page： 3 - 6   2017

　More details

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector  

Terahertz (THz) radiation has the potential to be a useful tool for sensing and imaging of wood because wood is relatively transparent at these frequencies (below about 1 THz). In this study, demonstration of simultaneous prediction of solid wood density, moisture content and fiber orientation, all of which are critical in manufacturing operations, of 14 species including softwood and hard wood was accomplished using terahertz time-domain spectroscopy (THz-TDS). THz measurements of wood at various moisture contents were taken for 19 orientations of the THz field (0-180o with 10o step) with respect to the visible grain. The real part of refractive index value and absorption cosfficient had strong correlation with density and moisture content of the wood. A strong correlation between measured and predicted values for density and moisture content were observed. The possibility for the estimation of fiber orientation using the birefringence property of wood were shown.

Estimation of wood density, moisture content and fiber orientation by THz time domain spectroscopy Reviewed

Inagaki T, Kashima M, Tsuchikawa S

28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector     page： 3 - 6   2017

　More details

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：28th International Conference on Wood Science and Technology, ICWST 2017: Implementation of Wood Science in Woodworking Sector  

Terahertz (THz) radiation has the potential to be a useful tool for sensing and imaging of wood because wood is relatively transparent at these frequencies (below about 1 THz). In this study, demonstration of simultaneous prediction of solid wood density, moisture content and fiber orientation, all of which are critical in manufacturing operations, of 14 species including softwood and hard wood was accomplished using terahertz time-domain spectroscopy (THz-TDS). THz measurements of wood at various moisture contents were taken for 19 orientations of the THz field (0-180o with 10o step) with respect to the visible grain. The real part of refractive index value and absorption cosfficient had strong correlation with density and moisture content of the wood. A strong correlation between measured and predicted values for density and moisture content were observed. The possibility for the estimation of fiber orientation using the birefringence property of wood were shown.