Mokuzai Gakkaishi最新文献_第10页

Erratum to: Economic Repercussions of Using Local Wood Products for Public Buildings [Mokuzai Gakkaishi Vol.61 (2015) No.5 p.326-334] 公共建筑使用当地木制品的经济影响[Mokuzai Gakkaishi Vol.61 (2015) No.5 p.326-334]

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2019-07-25 DOI: 10.2488/jwrs.65.166

Yuki Fuchigami, Yuki Kimura, Hirotaka Komata, F. Sasaki, Y. Furuta

引用次数: 0

Bending Stiffness and Strength of Reinforcement Arrangements for CFRP Reinforced Glulam (AFRW) CFRP增强胶合木配筋结构的抗弯刚度和强度

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2019-07-25 DOI: 10.2488/JWRS.65.148

Y. Mizuta, Satoshi Nagase, D. Ozaki, M. Noguchi

引用次数: 1

Study of Electric Double Layer Capacitor by Activated Carbon from Pruned Apple Branches 苹果枝活性炭制备双层电电容器的研究

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2019-07-25 DOI: 10.2488/JWRS.65.158

Hirose Takashi, A. Yamaguchi, Kazushi Nagahara, Takurou Hama, Iwano Naoto, Tooru Okayama

引用次数: 0

Study of Plant Regeneration by Tissue Culture from Immature Embryos of the Lacquer Tree, Toxicodendron vernicifluum 漆树幼胚组织培养再生植株的研究

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2019-07-25 DOI: 10.2488/JWRS.65.125

Kentaro Tsukada, Y. Yamagishi, E. Nabeshima, Michito Hosaka, K. Okada, H. Rahman, Satoshi Nakaba, M. Tabata, R. Funada

{"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}

引用次数: 0

Visual Effects of Wooden Floor Patterns with Contrast Variation 对比变化的木地板图案的视觉效果

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2019-07-25 DOI: 10.2488/JWRS.65.138

Mayuna Imanishi, Masashi Nakamura

{"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}

引用次数: 1

Identification and Colors of Wood Buried by a Sector Collapse at Mt. Chokai 朝开山扇形崩塌掩埋木材的鉴定与颜色

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2019-04-25 DOI: 10.2488/JWRS.65.102

Kayo Kudo, M. Ohyama, Y. Kurimoto, Koji Adachi, K. Takata

{"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}

引用次数: 1

Seismic Behavior of CLT Shear Walls Connected with Tensile Bolted Joints and Screwed Steel Joints CLT剪力墙受拉螺栓连接和螺纹钢连接的抗震性能

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2019-04-25 DOI: 10.2488/jwrs.65.71

Yunxiang Zhang, K. Kobayashi, M. Yasumura

{"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}

引用次数: 2

Generation Mechanism and Quantitative Evaluation of Fuzzy Grain on Planed Surfaces of Hinoki (Chamaecyparis obtusa) Hinoki（Chamaecyparis obtusa）平面模糊颗粒的产生机理及定量评价

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2019-04-25 DOI: 10.2488/JWRS.65.63

Hayato Furukawa, Y. Fujiwara, Y. Yanase, Y. Sawada, Y. Fujii

引用次数: 0

Analyzing the Modulus of Rupture of Medium Density Fiberboard Subjected to Outdoor Exposure for 21 Years 中密度纤维板在室外暴露21年后的断裂模量分析

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2019-04-25 DOI: 10.2488/JWRS.65.83

H. Korai, Ken Watanabe, Tomoyuki Hayashi

{"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}

引用次数: 0

Bayesian Analysis of Strength Properties of Particleboard 刨花板强度特性的贝叶斯分析

IF 0.3 4区农林科学

Mokuzai Gakkaishi Pub Date : 2019-04-25 DOI: 10.2488/JWRS.65.93

H. Korai, Ken Watanabe

引用次数: 2