Journal of the Japan Wood Research Society最新文献_第4页

Physical Properties of the Reed ( Phragmites australis ) Used for the Vibrating Plate of the Japanese Oboe (Hichiriki) I: Density variation in the culm and compressive strength in the transverse direction@@@材内の密度分布と稈の横圧縮強度用于日本双簧管振动板的芦苇(Phragmites australis)的物理性质I:秆的密度变化和横向抗压强度@@@

Journal of the Japan Wood Research Society Pub Date : 2016-01-01 DOI: 10.2488/jwrs.62.259

Ryotaro Nakanishi, E. Obataya

{"title":"Physical Properties of the Reed ( Phragmites australis ) Used for the Vibrating Plate of the Japanese Oboe (Hichiriki) I: Density variation in the culm and compressive strength in the transverse direction@@@材内の密度分布と稈の横圧縮強度","authors":"Ryotaro Nakanishi, E. Obataya","doi":"10.2488/jwrs.62.259","DOIUrl":"https://doi.org/10.2488/jwrs.62.259","url":null,"abstract":"Hichiriki is a traditional Japanese oboe used for Japanese ancient court music (Gagaku). The vibrating plate (Rozetsu) of the hichiriki is made from a reed (Phragmites australis), and the best reed is believed to be harvested in the Udono area along the Yodogawa river. In this study, we observed the anatomical structure of reeds selected by experts, and measured their density and transverse compressive strength to clarify the basic requirements for quality instruments. Within an internode, the upper part was always thinner and denser than the lower part, depending on the thickness of the low-density parenchyma layer beneath the cortex. Selected reed was slightly thicker and denser than unselected reed, but those differences were not significant. On the other hand, the transverse compressive strength of selected reed was significantly greater than that of unselected reed, and the upper part showed the highest strength. It is considered that sufficient transverse strength is required while the thinner, i.e. deformable upper part is preferred, because an end of the reed culm is compressed to form the closed end of the double-reed. With respect to shape, density and compressive strength, the Mukaijima area along the Uji river is a potential field to harvest reeds for hichiriki.","PeriodicalId":17248,"journal":{"name":"Journal of the Japan Wood Research Society","volume":"36 1","pages":"259-265"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89539319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Equilibrium Moisture Content of Wood Estimated Using the Climate Data of Japan 利用日本气候资料估算木材平衡含水率

Journal of the Japan Wood Research Society Pub Date : 2016-01-01 DOI: 10.2488/JWRS.62.182

S. Saito, S. Shida

引用次数: 3

Effect of Contrast Changes in Wood-grain Patterns by Coating on Visual Attractiveness 涂布木纹图案对比度变化对视觉吸引力的影响

Journal of the Japan Wood Research Society Pub Date : 2016-01-01 DOI: 10.2488/JWRS.62.293

Nanoka Komeyama, Masashi Nakamura, Y. Kataoka, M. Sugiyama

{"title":"Effect of Contrast Changes in Wood-grain Patterns by Coating on Visual Attractiveness","authors":"Nanoka Komeyama, Masashi Nakamura, Y. Kataoka, M. Sugiyama","doi":"10.2488/JWRS.62.293","DOIUrl":"https://doi.org/10.2488/JWRS.62.293","url":null,"abstract":"Wood has a highly aesthetic appearance. There have been some efforts to elucidate its psychological and/or physiological effects on humans, but quantitative data are still insufficient. This study aimed to examine the effect of contrast change in grain patterns on visual attractiveness and impressions. Three species and ten coating specifications were selected and thirty kinds of fancy veneer overlaid plywood were prepared. Their surface images were captured by the imaging spectroscope system, and were subjected to histogram analysis and multi-resolution contrast analysis to derive contrast values as image characteristics. The specimens were also provided for free observation and sensory evaluation by 27 subjects. During the observation, eye fixations of the subjects were recorded by an eye tracker. The contrast values derived from the image analyses exactly expressed the appearance change by coatings, and showed highly positive correlation to “subjective noticeability of grain patterns.” Moreover, the eye tracking revealed that the visual attractiveness of the specimens was affected by the contrast changes.","PeriodicalId":17248,"journal":{"name":"Journal of the Japan Wood Research Society","volume":"44 1","pages":"293-300"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84589537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Roles of Plant Peroxidases in Cell Wall Formation and Modification 植物过氧化物酶在细胞壁形成和修饰中的作用

Journal of the Japan Wood Research Society Pub Date : 2016-01-01 DOI: 10.2488/JWRS.62.91

Jun Shigeto, Y. Tsutsumi

引用次数: 0

Preference Evaluation Based on Cognitive Psychology of the Quantity of Knots Present in Wood Wall Panels II : Effects of ratio of knot area of todomatsu wall panels and setting on people's preference@@@節の量の違いと使用場所が内装材の評価に及ぼす影響基于木墙板结数量认知心理学的偏好评价II: todomatsu墙板结面积与设置比例对人们偏好的影响

Journal of the Japan Wood Research Society Pub Date : 2016-01-01 DOI: 10.2488/JWRS.62.67

Kumiko Matsumoto, Koji Kawato, M. Imai, Naoto Saito, M. Sasaki, Yasuhiro Kawabata

引用次数: 3

Derivation of Image Characteristics to Describe the Appearance of Wood Flooring Products and Verification of Their Correspondence to Impressions Evaluated by Human Observers 描述木地板产品外观的图像特征的推导及其与人类观察者评价的印象的对应性的验证

Journal of the Japan Wood Research Society Pub Date : 2016-01-01 DOI: 10.2488/JWRS.62.108

Masashi Nakamura, Akane Saito, Naoki Okada

{"title":"Derivation of Image Characteristics to Describe the Appearance of Wood Flooring Products and Verification of Their Correspondence to Impressions Evaluated by Human Observers","authors":"Masashi Nakamura, Akane Saito, Naoki Okada","doi":"10.2488/JWRS.62.108","DOIUrl":"https://doi.org/10.2488/JWRS.62.108","url":null,"abstract":"Manufacturers of wood flooring products pursue enhancement of a wood-like feeling of their products. However, to numerically evaluate the effect of various treatments to improve the wood-like feeling has been very difficult. This study aims to develop a novel evaluation technique which objectively describes appearances of wood floorings which contribute to a wood-like feeling by certain image characteristics. Forty-seven flooring products were collected. Their surfaces were illuminated at various lighting azimuths, and high-resolution images of the surfaces were captured. The surface images were subjected to multi-resolution contrast analysis and correlation analysis. Four image characteristics of “micro visibility”, “macro visibility”, “contrast anisotropy”, and “gloss shift” were derived from these image analyses, which corresponded well with the reflectance properties of the flooring products. Additional 20 flooring products were prepared for sensory evaluation by 24 ordinary consumers. Multiple regression analysis revealed that the image characteristics computed for the 20 flooring products explained the results of sensory evaluation well.","PeriodicalId":17248,"journal":{"name":"Journal of the Japan Wood Research Society","volume":"62 1","pages":"108-118"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82000339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Wood-Plastic Composites Equipped with an Electromagnetic Wave Absorbing Function by Adding Magnetic Powder 添加磁粉的木塑复合材料具有电磁波吸收功能

Journal of the Japan Wood Research Society Pub Date : 2016-01-01 DOI: 10.2488/JWRS.62.9

K. Miura, N. Sekino, K. Kubota, H. Oka, Masahiko Kobayashi, M. Kiguchi, Yushin Ohtomo

{"title":"Wood-Plastic Composites Equipped with an Electromagnetic Wave Absorbing Function by Adding Magnetic Powder","authors":"K. Miura, N. Sekino, K. Kubota, H. Oka, Masahiko Kobayashi, M. Kiguchi, Yushin Ohtomo","doi":"10.2488/JWRS.62.9","DOIUrl":"https://doi.org/10.2488/JWRS.62.9","url":null,"abstract":"In order to provide wood-plastic composites (WPCs) with a GHz electromagnetic wave absorbing function, WPCs were manufactured by adding magnetic powder. The effect of increases in volume fraction of Mn-Zn magnetic powder on bending, hygroscopic, and electromagnetic characteristics of the WPCs were investigated and the electromagnetic wave absorbing performance was estimated, focusing especially on the effects of moisture on performance. The results showed that there was no deterioration in bending performance by either reducing the volume fraction of wood powder or increasing that of magnetic powder. Equilibrium moisture contents (EMC) measured at high humidity were less than 6% even for the specimen with the highest volume fraction of wood powder. Because of such a low hygroscopic property, there was no significant difference in electromagnetic wave absorbing performance, estimated using relative permittivity and permeability between the samples exposed at high humidity and in the bone-dry condition. Furthermore, return losses of double-layered WPCs for practical use were simulated by transmission line theory. As a result, matched frequencies such that return loss reaches more than 40 dB were obtained in the microwave band by optimizing the sample thickness.","PeriodicalId":17248,"journal":{"name":"Journal of the Japan Wood Research Society","volume":"61 2 1","pages":"9-17"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86380558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Estimate of Acetaldehyde Concentration in a Full-scale Testing Room Based on the Emission Factors of Wood-based Materials Obtained Using the Small Chamber Method 基于小室法获得的木质材料排放系数的全尺寸测试室内乙醛浓度估算

Journal of the Japan Wood Research Society Pub Date : 2016-01-01 DOI: 10.2488/JWRS.62.317

Masaki Suzuki, H. Akitsu, K. Miyamoto, S. Tohmura

引用次数: 1

Greenhouse Gas Emission Reductions in a District Heating and Cooling System by Using Woody Biomass: A study in Shiwa, Iwate Prefecture@@@岩手県紫波町を対象として利用木质生物质减少区域供热供冷系统的温室气体排放:在岩手县石华市的研究

Journal of the Japan Wood Research Society Pub Date : 2016-01-01 DOI: 10.2488/JWRS.62.172

Chihiro Kayo, Ryota Ojimi, M. Iwaoka, K. Yasuda

引用次数: 3

Relationships between Reflection Properties and Visual Attractiveness of Fiddleback Figures: Evaluation with eye tracking and image analysis@@@視線追跡および画像解析による評価 Relationships between Reflection Properties and Visual Attractiveness of Fiddleback Figures:Evaluation with eye tracking and image analysis@@@通过视线追踪和图像分析进行评估

Journal of the Japan Wood Research Society Pub Date : 2016-01-01 DOI: 10.2488/JWRS.62.284

M. Kato, Masashi Nakamura

{"title":"Relationships between Reflection Properties and Visual Attractiveness of Fiddleback Figures: Evaluation with eye tracking and image analysis@@@視線追跡および画像解析による評価","authors":"M. Kato, Masashi Nakamura","doi":"10.2488/JWRS.62.284","DOIUrl":"https://doi.org/10.2488/JWRS.62.284","url":null,"abstract":"Wood has unique reflection properties originating in its anatomical structure. Gloss transition is a typical one of such properties, which appears by changes in the optical geometry of the timber surface, the lighting source, and the observer. Wavy grain or curly grain easily tend to show the gloss transition, and this special appearance directly affects the aesthetic value of various wood products and craftworks. Thus, curly maple has been used as backboards of the violin with fiddleback figures. To elucidate the relationship between the appearance and the attractiveness of the fiddleback figures, image characteristics related to the gloss transition were calculated regarding 10 violin backs, and psychological response and eye movements of observers viewing videos of the gloss transition were measured. Results were summarized as follows: 1) Contrast spectra derived by the image analysis demonstrate the gloss transition effectively. 2) Subjects’ eyes follow the gloss transition, although distribution patterns of eye fixations are different for each fiddleback figure. 3) The fiddleback figures of higher contrast tend to evoke a more “Varied” impression on observers.","PeriodicalId":17248,"journal":{"name":"Journal of the Japan Wood Research Society","volume":"66 1","pages":"284-292"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75045959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1