Yuki Fuchigami, Yuki Kimura, Hirotaka Komata, F. Sasaki, Y. Furuta
{"title":"Erratum to: Economic Repercussions of Using Local Wood Products for Public Buildings [Mokuzai Gakkaishi Vol.61 (2015) No.5 p.326-334]","authors":"Yuki Fuchigami, Yuki Kimura, Hirotaka Komata, F. Sasaki, Y. Furuta","doi":"10.2488/jwrs.65.166","DOIUrl":"https://doi.org/10.2488/jwrs.65.166","url":null,"abstract":"","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2019-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48700825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
FRP reinforced glulam has been actively developed in USA and EU since 2000 to now. Our colleges also had developed AFRW （advanced fiber reinforced wood） in 2000, in Japan. We restarted to develop AFRW to help solve Japanese forestry problems, while aiming at future high quality timber buildings. Experiments aiming to lower the cost of AFRW were conducted with the parameters of CFRP reinforcement arrangements and the CFRP ratio, taking into account end joint processing. It was found that AFRW with only a bottom CFRP arrangement was economically effective when aiming at less than 1.5 times of bending stiffness, but AFRW with both top and bottom CFRP arrangement was economically effective when aiming at more than 1.7 times of bending stiffness. New types of CFRP arrangements for AFRW edges were developed, and were demonstrated to have the same mechanical properties as fully arranged CFRP sheets against the longitudinal and width directions of the AFRW. (cid:9487)(cid:9513)(cid:9533)(cid:9531)(cid:9523)(cid:9526)(cid:9512)(cid:9527) : Fiber Reinforced Wood, Arrangement of CFRP, Mechanical property, Glued laminated Timber.
{"title":"Bending Stiffness and Strength of Reinforcement Arrangements for CFRP Reinforced Glulam (AFRW)","authors":"Y. Mizuta, Satoshi Nagase, D. Ozaki, M. Noguchi","doi":"10.2488/JWRS.65.148","DOIUrl":"https://doi.org/10.2488/JWRS.65.148","url":null,"abstract":"FRP reinforced glulam has been actively developed in USA and EU since 2000 to now. Our colleges also had developed AFRW （advanced fiber reinforced wood） in 2000, in Japan. We restarted to develop AFRW to help solve Japanese forestry problems, while aiming at future high quality timber buildings. Experiments aiming to lower the cost of AFRW were conducted with the parameters of CFRP reinforcement arrangements and the CFRP ratio, taking into account end joint processing. It was found that AFRW with only a bottom CFRP arrangement was economically effective when aiming at less than 1.5 times of bending stiffness, but AFRW with both top and bottom CFRP arrangement was economically effective when aiming at more than 1.7 times of bending stiffness. New types of CFRP arrangements for AFRW edges were developed, and were demonstrated to have the same mechanical properties as fully arranged CFRP sheets against the longitudinal and width directions of the AFRW. (cid:9487)(cid:9513)(cid:9533)(cid:9531)(cid:9523)(cid:9526)(cid:9512)(cid:9527) : Fiber Reinforced Wood, Arrangement of CFRP, Mechanical property, Glued laminated Timber.","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2019-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42005470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We studied electric double layer capacitors with activated carbon from pruned apple branches and commercial activated carbon. It was found that carbon yield decreases with increasing specific surface area, micropore volume and mesopore volume. The micropore and mesopore volume plots of activated carbon move to the region of larger pores and the volume of pores of around 0.7 nm can be related to the initial value of the capacitance. In addition, compared with another product, there is a good capacitance and internal resistance in activated carbon, which is analyzed by durable examination. (cid:9487)(cid:9513)(cid:9533)(cid:9531)(cid:9523)(cid:9526)(cid:9512)(cid:9527) : pruned apple branches, activated carbon, micropore volume, mesopore volume, electric double layer.
{"title":"Study of Electric Double Layer Capacitor by Activated Carbon from Pruned Apple Branches","authors":"Hirose Takashi, A. Yamaguchi, Kazushi Nagahara, Takurou Hama, Iwano Naoto, Tooru Okayama","doi":"10.2488/JWRS.65.158","DOIUrl":"https://doi.org/10.2488/JWRS.65.158","url":null,"abstract":"We studied electric double layer capacitors with activated carbon from pruned apple branches and commercial activated carbon. It was found that carbon yield decreases with increasing specific surface area, micropore volume and mesopore volume. The micropore and mesopore volume plots of activated carbon move to the region of larger pores and the volume of pores of around 0.7 nm can be related to the initial value of the capacitance. In addition, compared with another product, there is a good capacitance and internal resistance in activated carbon, which is analyzed by durable examination. (cid:9487)(cid:9513)(cid:9533)(cid:9531)(cid:9523)(cid:9526)(cid:9512)(cid:9527) : pruned apple branches, activated carbon, micropore volume, mesopore volume, electric double layer.","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2019-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44457114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kentaro Tsukada, Y. Yamagishi, E. Nabeshima, Michito Hosaka, K. Okada, H. Rahman, Satoshi Nakaba, M. Tabata, R. Funada
Resin and sap of lacquer trees (Toxicodendron vernicifluum) are called “Urushi”. Urushi has been used for paints or adhesives since the Jomon period in Japan. Since it is prospective that demand for domestic Urushi for preservation of cultural property will increase, the mass production of seedlings of T. vernicifluum of high quality is important. We initially cultured immature zygotic embryos from immature fruits on Woody Plant Medium (WPM) containing 2,4-dichlorophenoxyacetic acid (2,4-D), α -naphthaleneacetic acid (NAA) or indole-3-acetic acid (IAA) as an auxin supplemented with polyvinylpyrrolidone (PVP). Somatic embryos were induced directly from immature zygotic embryos and secondary somatic embryos were induced from somatic embryos. Some secondary somatic embryos formed roots and hypocotyls. Finally, we transferred the secondary somatic embryo-derived plantlets to soil in pots and the plantlets continued to grow. Thus, we developed a tissue culture system for plant regeneration for the propagation of T. vernicifluum.
{"title":"Study of Plant Regeneration by Tissue Culture from Immature Embryos of the Lacquer Tree, Toxicodendron vernicifluum","authors":"Kentaro Tsukada, Y. Yamagishi, E. Nabeshima, Michito Hosaka, K. Okada, H. Rahman, Satoshi Nakaba, M. Tabata, R. Funada","doi":"10.2488/JWRS.65.125","DOIUrl":"https://doi.org/10.2488/JWRS.65.125","url":null,"abstract":"Resin and sap of lacquer trees (Toxicodendron vernicifluum) are called “Urushi”. Urushi has been used for paints or adhesives since the Jomon period in Japan. Since it is prospective that demand for domestic Urushi for preservation of cultural property will increase, the mass production of seedlings of T. vernicifluum of high quality is important. We initially cultured immature zygotic embryos from immature fruits on Woody Plant Medium (WPM) containing 2,4-dichlorophenoxyacetic acid (2,4-D), α -naphthaleneacetic acid (NAA) or indole-3-acetic acid (IAA) as an auxin supplemented with polyvinylpyrrolidone (PVP). Somatic embryos were induced directly from immature zygotic embryos and secondary somatic embryos were induced from somatic embryos. Some secondary somatic embryos formed roots and hypocotyls. Finally, we transferred the secondary somatic embryo-derived plantlets to soil in pots and the plantlets continued to grow. Thus, we developed a tissue culture system for plant regeneration for the propagation of T. vernicifluum.","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2019-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2488/JWRS.65.125","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45348974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
As a wooden floor is composed of many wood elements, homogeneity of colors or grains of the floor would be lost occasionally. This study aims to determine image characteristics which objectively describe visual irregularities of a given wooden floor pattern, and to examine the effect of these characteristics on visual impressions of the floor patterns. Three parameters, inter-element contrast, intra-element contrast and magnification, were set up to generate 27 kinds of wooden floor patterns systematically by using a computer graphics technique. These floor images were subjected to multi-resolution contrast analysis to calculate two contrast values as the image characteristics which corresponded to inter-element contrast and intra-element contrast, respectively. Also, the contrast values were corrected using a human contrast sensitivity function in consideration of the dependence of spatial frequency. The floor patterns were also provided for sensory evaluation by 36 subjects. They observed and evaluated each wooden floor pattern projected on a horizontally placed screen of the same scale. The wooden floor pattern involving both larger contrasts tended to evoke visual irregularity more easily. Also, the contribution of both contrast to the visual irregularity was almost the same.
{"title":"Visual Effects of Wooden Floor Patterns with Contrast Variation","authors":"Mayuna Imanishi, Masashi Nakamura","doi":"10.2488/JWRS.65.138","DOIUrl":"https://doi.org/10.2488/JWRS.65.138","url":null,"abstract":"As a wooden floor is composed of many wood elements, homogeneity of colors or grains of the floor would be lost occasionally. This study aims to determine image characteristics which objectively describe visual irregularities of a given wooden floor pattern, and to examine the effect of these characteristics on visual impressions of the floor patterns. Three parameters, inter-element contrast, intra-element contrast and magnification, were set up to generate 27 kinds of wooden floor patterns systematically by using a computer graphics technique. These floor images were subjected to multi-resolution contrast analysis to calculate two contrast values as the image characteristics which corresponded to inter-element contrast and intra-element contrast, respectively. Also, the contrast values were corrected using a human contrast sensitivity function in consideration of the dependence of spatial frequency. The floor patterns were also provided for sensory evaluation by 36 subjects. They observed and evaluated each wooden floor pattern projected on a horizontally placed screen of the same scale. The wooden floor pattern involving both larger contrasts tended to evoke visual irregularity more easily. Also, the contribution of both contrast to the visual irregularity was almost the same.","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2019-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43717344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kayo Kudo, M. Ohyama, Y. Kurimoto, Koji Adachi, K. Takata
In 2014, large numbers of specimens of buried wood were excavated at the construction site for Nihonkai-tohoku expressway in Nikaho, Akita prefecture, Japan. They had been buried by the Kisakata debris avalanche following a sector collapse at Mt. Chokai in 466 B.C. The aim of this study is to identify the species of the buried wood and to record its characteristics, including colors. Sections made by sliding microtome were observed under a light microscope and samples were identified on the basis of anatomical features. As a result, wood identification of 39 buried specimens, included : Castanea crenata, Quercus section Quercus, Zelkova serrata, Aesculus turbinate, Fagus, Ostrya japonica, and Cryptomeria japonica. The color of buried wood was different from that of wood from living specimens of the same species. Buried wood of C. crenata and Quercus species was black in color, of Z. serrata was dark green, of A. turbinate, Fagus, and O. japonica was brown, and of C. japonica ranged from green-gray to brown. These buried wood specimens are valuable, not only as a model sample to analyze the mechanism by which color and strength of wood change during prolonged burial, but also as a part of the cultural heritage of the area. Therefore, it is significant to know the characteristic properties and chemical composition of buried wood specimens. Our results should provide fundamental and practical information for future investigation.
{"title":"Identification and Colors of Wood Buried by a Sector Collapse at Mt. Chokai","authors":"Kayo Kudo, M. Ohyama, Y. Kurimoto, Koji Adachi, K. Takata","doi":"10.2488/JWRS.65.102","DOIUrl":"https://doi.org/10.2488/JWRS.65.102","url":null,"abstract":"In 2014, large numbers of specimens of buried wood were excavated at the construction site for Nihonkai-tohoku expressway in Nikaho, Akita prefecture, Japan. They had been buried by the Kisakata debris avalanche following a sector collapse at Mt. Chokai in 466 B.C. The aim of this study is to identify the species of the buried wood and to record its characteristics, including colors. Sections made by sliding microtome were observed under a light microscope and samples were identified on the basis of anatomical features. As a result, wood identification of 39 buried specimens, included : Castanea crenata, Quercus section Quercus, Zelkova serrata, Aesculus turbinate, Fagus, Ostrya japonica, and Cryptomeria japonica. The color of buried wood was different from that of wood from living specimens of the same species. Buried wood of C. crenata and Quercus species was black in color, of Z. serrata was dark green, of A. turbinate, Fagus, and O. japonica was brown, and of C. japonica ranged from green-gray to brown. These buried wood specimens are valuable, not only as a model sample to analyze the mechanism by which color and strength of wood change during prolonged burial, but also as a part of the cultural heritage of the area. Therefore, it is significant to know the characteristic properties and chemical composition of buried wood specimens. Our results should provide fundamental and practical information for future investigation.","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":"1 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2019-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41461286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to provide the mechanical properties and seismic performance of CLT shear walls to which tensile bolted joints and screwed steel joints were applied for vertical restraint, cyclic lateral loading tests and pseudo-dynamic tests were conducted on 3-ply sugi CLT shear walls. Moreover, the analytical model was validated by comparing the time-history earthquake response analysis and pseudo-dynamic test results for these types of shear walls. The relation between the magnitude of input ground motion and the horizontal displacement response was investigated by conducting time-history earthquake response analysis on several earthquake records and artificial waves with variable magnitude of input ground motion. Also, the possibility of replacing the tensile bolted joints by screwed steel joints was discussed. The yield strength and the maximum strength of shear walls with screwed joints were 20% higher than those with tensile bolts in the cyclic lateral loading tests. With the same seismic wave input in the pseudo-dynamic tests, the maximum response displacements of screwed joint specimens were smaller than those of tensile bolt specimens. Furthermore, the response displacement of earthquake response analysis showed good agreement with pseudo-dynamic test results. It is suggested that CLT shear walls with screwed steel joints give enough performance compared to shear walls with tensile bolt joints.
{"title":"Seismic Behavior of CLT Shear Walls Connected with Tensile Bolted Joints and Screwed Steel Joints","authors":"Yunxiang Zhang, K. Kobayashi, M. Yasumura","doi":"10.2488/jwrs.65.71","DOIUrl":"https://doi.org/10.2488/jwrs.65.71","url":null,"abstract":"In order to provide the mechanical properties and seismic performance of CLT shear walls to which tensile bolted joints and screwed steel joints were applied for vertical restraint, cyclic lateral loading tests and pseudo-dynamic tests were conducted on 3-ply sugi CLT shear walls. Moreover, the analytical model was validated by comparing the time-history earthquake response analysis and pseudo-dynamic test results for these types of shear walls. The relation between the magnitude of input ground motion and the horizontal displacement response was investigated by conducting time-history earthquake response analysis on several earthquake records and artificial waves with variable magnitude of input ground motion. Also, the possibility of replacing the tensile bolted joints by screwed steel joints was discussed. The yield strength and the maximum strength of shear walls with screwed joints were 20% higher than those with tensile bolts in the cyclic lateral loading tests. With the same seismic wave input in the pseudo-dynamic tests, the maximum response displacements of screwed joint specimens were smaller than those of tensile bolt specimens. Furthermore, the response displacement of earthquake response analysis showed good agreement with pseudo-dynamic test results. It is suggested that CLT shear walls with screwed steel joints give enough performance compared to shear walls with tensile bolt joints.","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2019-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46999179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hayato Furukawa, Y. Fujiwara, Y. Yanase, Y. Sawada, Y. Fujii
An orthogonal cutting experiment of air-dried hinoki (Chamaecyparis obtusa) was conducted and the fuzzy grain recognized as a whitish cluster on the finished surface was extracted by digital image data processing. The relative area of fuzzy grain took the maximum values of 6 to 10% for the contact angle of annual rings (φ) of 0°, decreased as the contact angle increased, then took the minimum values of 3 to 4% for the angle of 45°and finally increased in accordance with the contact angle. It was revealed from SEM observation that the cluster of fuzzy grain consists of cells around the ray that were scraped off in the cutting, but not separated as complete chips, were crashed by the travelling cutting edge, and were finally raised up from the wood surface after the cutting. The conformation of the cluster changed characteristically in accordance with the contact angle of annual rings. It was also revealed that the number of AE (Acoustic Emission) events detected in the cutting process correlated positively with the relative area of fuzzy grain.
{"title":"Generation Mechanism and Quantitative Evaluation of Fuzzy Grain on Planed Surfaces of Hinoki (Chamaecyparis obtusa)","authors":"Hayato Furukawa, Y. Fujiwara, Y. Yanase, Y. Sawada, Y. Fujii","doi":"10.2488/JWRS.65.63","DOIUrl":"https://doi.org/10.2488/JWRS.65.63","url":null,"abstract":"An orthogonal cutting experiment of air-dried hinoki (Chamaecyparis obtusa) was conducted and the fuzzy grain recognized as a whitish cluster on the finished surface was extracted by digital image data processing. The relative area of fuzzy grain took the maximum values of 6 to 10% for the contact angle of annual rings (φ) of 0°, decreased as the contact angle increased, then took the minimum values of 3 to 4% for the angle of 45°and finally increased in accordance with the contact angle. It was revealed from SEM observation that the cluster of fuzzy grain consists of cells around the ray that were scraped off in the cutting, but not separated as complete chips, were crashed by the travelling cutting edge, and were finally raised up from the wood surface after the cutting. The conformation of the cluster changed characteristically in accordance with the contact angle of annual rings. It was also revealed that the number of AE (Acoustic Emission) events detected in the cutting process correlated positively with the relative area of fuzzy grain.","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2019-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2488/JWRS.65.63","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42152956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Medium density fiberboard (MDF) was subjected to outdoor exposure for 21 years to evaluate its durability, and reduction in the modulus of rupture (MOR) was then inferred using Bayesian analysis. The durability of MDF after outdoor exposure of 21 years was evident. Different posterior predictive distributions of MOR were apparent for each exposure time due to irregular variation of variances in MOR. As a result, it was not possible to adequately infer the posterior predictive distributions of MOR using Bayesian analysis with a model that included constant MOR variance. The irregular variation of variances in MOR was therefore considered to be due to random effects, and a hierarchical model that included these random effects was constructed: the posterior predictive distributions of MOR were then adequately inferred using Bayesian analysis with the hierarchical model that included the random effects. In addition, 95% prediction intervals were inferred using the model including constant variance in MOR or the hierarchical model including the random effects; however, the 95% prediction interval of the latter model was found to be more suitable than that of the former model.
{"title":"Analyzing the Modulus of Rupture of Medium Density Fiberboard Subjected to Outdoor Exposure for 21 Years","authors":"H. Korai, Ken Watanabe, Tomoyuki Hayashi","doi":"10.2488/JWRS.65.83","DOIUrl":"https://doi.org/10.2488/JWRS.65.83","url":null,"abstract":"Medium density fiberboard (MDF) was subjected to outdoor exposure for 21 years to evaluate its durability, and reduction in the modulus of rupture (MOR) was then inferred using Bayesian analysis. The durability of MDF after outdoor exposure of 21 years was evident. Different posterior predictive distributions of MOR were apparent for each exposure time due to irregular variation of variances in MOR. As a result, it was not possible to adequately infer the posterior predictive distributions of MOR using Bayesian analysis with a model that included constant MOR variance. The irregular variation of variances in MOR was therefore considered to be due to random effects, and a hierarchical model that included these random effects was constructed: the posterior predictive distributions of MOR were then adequately inferred using Bayesian analysis with the hierarchical model that included the random effects. In addition, 95% prediction intervals were inferred using the model including constant variance in MOR or the hierarchical model including the random effects; however, the 95% prediction interval of the latter model was found to be more suitable than that of the former model.","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2019-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44127161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Strength properties (modulus of rupture, internal bond strength, lateral nail resistance, and nail-head pull-through) of particleboard were measured, and were subjected to conventionally statistical and Bayesian analyses. All strength properties could be fitted to normal distributions. In conventionally statistical analysis, mean and variance are constant values that have one true value. Therefore, when mean and variance are distributed, probability distributions of strength properties could not be inferred suitably using conventionally statistical analysis. In Bayesian analysis, because mean and variance are considered to be distributed, their distributions could be used to infer probability distributions of strength properties. The mean and variance of products with large variance of strength properties, such as particleboards, are considered to be distributed. Thus, Bayesian analysis is useful in the quality control of particleboards.
{"title":"Bayesian Analysis of Strength Properties of Particleboard","authors":"H. Korai, Ken Watanabe","doi":"10.2488/JWRS.65.93","DOIUrl":"https://doi.org/10.2488/JWRS.65.93","url":null,"abstract":"Strength properties (modulus of rupture, internal bond strength, lateral nail resistance, and nail-head pull-through) of particleboard were measured, and were subjected to conventionally statistical and Bayesian analyses. All strength properties could be fitted to normal distributions. In conventionally statistical analysis, mean and variance are constant values that have one true value. Therefore, when mean and variance are distributed, probability distributions of strength properties could not be inferred suitably using conventionally statistical analysis. In Bayesian analysis, because mean and variance are considered to be distributed, their distributions could be used to infer probability distributions of strength properties. The mean and variance of products with large variance of strength properties, such as particleboards, are considered to be distributed. Thus, Bayesian analysis is useful in the quality control of particleboards.","PeriodicalId":49800,"journal":{"name":"Mokuzai Gakkaishi","volume":" ","pages":""},"PeriodicalIF":0.3,"publicationDate":"2019-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49286589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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