Drvna Industrija最新文献_第3页

Kriterij za objektivno određivanje vrijednosti praga osjetljivosti pri filtriranju signala hrapavosti strojno obrađene površine masivnog drva filtrom utemeljenim na brzoj Fourierovoj transformaciji (FFT) 用于过滤粗糙度信号的阈值傅立叶变换（FFT）表面滤波器

4区农林科学

Drvna Industrija Pub Date : 2023-09-29 DOI: 10.5552/drvind.2023.0088

Igor Đukić, Juraj Jovanović, Ivica Župčić, Matija Jug

{"title":"Kriterij za objektivno određivanje vrijednosti praga osjetljivosti pri filtriranju signala hrapavosti strojno obrađene površine masivnog drva filtrom utemeljenim na brzoj Fourierovoj transformaciji (FFT)","authors":"Igor Đukić, Juraj Jovanović, Ivica Župčić, Matija Jug","doi":"10.5552/drvind.2023.0088","DOIUrl":"https://doi.org/10.5552/drvind.2023.0088","url":null,"abstract":"The article presents the method for an objective determination of threshold value, needed for filtering out the anatomical roughness signal, with filter based on fast Fourier Transform (FFT), from surface roughness profile after machining. The method includes experimental preparation of solid wood surface by cutting in such a way to get a surface that can be considered to represent only anatomical roughness, with no other influence. Experiments were performed on radial cross section of solid oak wood (Quercus robur L.) so that the results could be compared with roughness profiles that were previously obtained in experiments after sawing with circular saw. From these samples and based on frequency analysis of anatomical roughness signals, the threshold value was determined to be 1.6 &mu;m. The average value of Ra parameter of anatomical roughness for specimens of radial cross section of solid oak wood was 2.1 &mu;m with standard deviation of 0.3 &mu;m. The importance of choosing adequate sampling length in threshold determination, based on frequency analysis of anatomical roughness signal, was also established.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135295508","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

Physical and Chemical Properties of Highland Bamboo (Yushania alpina) Culms Grown in Ethiopia 埃塞俄比亚高原竹(Yushania alpina)秆的理化性质

4区农林科学

Drvna Industrija Pub Date : 2023-09-29 DOI: 10.5552/drvind.2023.0059

Mahadi Mussa, Getachew Desalegn, Gemechu Kaba, Anteneh Tesfaye

{"title":"Physical and Chemical Properties of Highland Bamboo (Yushania alpina) Culms Grown in Ethiopia","authors":"Mahadi Mussa, Getachew Desalegn, Gemechu Kaba, Anteneh Tesfaye","doi":"10.5552/drvind.2023.0059","DOIUrl":"https://doi.org/10.5552/drvind.2023.0059","url":null,"abstract":"Bamboo is the fastest growing plant currently known on earth, a property that enables it to be the best alternative as a future source of wood fi ber. This study investigated the effect of site and culm height on the physical and chemical properties of Yushania alpina culms grown in Ethiopia. Matured Yushania alpina 3 to 5-year-old samples were harvested from Hagere-Selam and Rebu-Gebeya sites. The culms were subdivided into three equal lengths (bottom, middle, and top), and the variations in physical and chemical properties between the two sites and the culm heights of Yushania alpina were investigated. The results showed that the average values of MC, basic density, tangential and longitudinal shrinkage of Yushania alpina culms for Hagere-Selam and Rebu-Gebeya sites were (91.78 and 80.32 %), (0.65 and 0.63 g/cm3), (6.63 and 5.84 %) and (0.63 and 0.56 %), respectively. The average values of cellulose, lignin, extractive and ash contents in the culms for Hagere-Selam and Rebu-Gebeya sites were (52.84 and 50.71 %), (26.55, and 26.04 %), (8.41 and 8.02 %) and (1.95 and 2.17 %), respectively. The results revealed that the site affected the MC, basic density, cellulose, lignin, extractive, and ash contents of Yushania alpina culms but not the tangential and longitudinal shrinkage. The culm height of Yushania alpina affected MC, basic density, tangential shrinkage, longitudinal shrinkage, cellulose, lignin, extractive, and ash contents. In the case of both sites, the highest percentages of MC, tangential and longitudinal shrinkage, and ash content were observed at the base and lowest at the top of the culms. On the contrary, both sites observed thehighest magnitude of basic density, cellulose and extractive at the top and lowest at the base of the culms. The variations in physical and chemical properties at different sites and culm heights infl uence the utilization of Yushania alpina culms for industries and end products.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135295510","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

Proizvodnja laganih troslojnih iverica iskorištenjem otpadnih autoguma 通过回收废弃自粘胶生产亚麻刨花板

4区农林科学

Drvna Industrija Pub Date : 2023-09-29 DOI: 10.5552/drvind.2023.0058

Cem Köse, Mustafa Oncel, Çağrı Olgun, Alperen Kaymakci

{"title":"Proizvodnja laganih troslojnih iverica iskorištenjem otpadnih autoguma","authors":"Cem Köse, Mustafa Oncel, Çağrı Olgun, Alperen Kaymakci","doi":"10.5552/drvind.2023.0058","DOIUrl":"https://doi.org/10.5552/drvind.2023.0058","url":null,"abstract":"The aim of the study is to investigate the production possibilities of particleboard by using waste tirerubbers with different properties as fillers and find a solution to a serious environmental pollution problem caused by waste tires. For this purpose, waste summer and winter tires were ground, rubber powders were obtained by separating rubber materials from other materials, and particleboards with different properties were produced using this sawdust in different percentages. The oven-dry density, air-dry density, and equilibrium moisture content at (65&plusmn;5) % RH and (20&plusmn;2) &ordm;C, thickness swelling (TS, 2 hours and 24 hours), water absorption (WA, 2 hours and 24 hours) characteristics, bending strength, modulus of elasticity, and internal bond strength were determined according to the applicable European standards. The hydrophobic nature of the tire rubber enhanced the water absorption ratios of particleboards. In addition, mechanical performance of groups was affected by tire content, and it was mainly determined that the values decreased dramatically with increasing tire content. It was especially observed that this decrease was more pronounced when subtracting 30 % to 20 % waste tire content. The groups including winter waste tire rubber achieved better performance than summer waste tire groups. The use of waste rubber in boards resulted in a decrease in the equilibrium moisture content and mechanical strength of the samples.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135295504","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

Anatomical Characteristics and Fibre Quality of Grapevine (Vitis vinifera L.) Stem Wood 葡萄(Vitis vinifera L.)的解剖特性和纤维品质干木

4区农林科学

Drvna Industrija Pub Date : 2023-09-29 DOI: 10.5552/drvind.2023.0064

Kamile Tirak Hizal, Nihan Koçer

{"title":"Anatomical Characteristics and Fibre Quality of Grapevine (Vitis vinifera L.) Stem Wood","authors":"Kamile Tirak Hizal, Nihan Koçer","doi":"10.5552/drvind.2023.0064","DOIUrl":"https://doi.org/10.5552/drvind.2023.0064","url":null,"abstract":"This study investigated the anatomical characteristics and fibre quality for papermaking indices of Vitis vinifera L. (grapevine) stem wood, which is extracted as agricultural waste. Two grapevine trunks were collected from the G&uuml;lnar region in Turkey. Observations on microscopic anatomical characteristics were carried out on sectioned and macerated wood samples. According to the measurements conducted, the following mean anatomical characteristics were determined: earlywood vessel tangential diameter 258.81 &mu;m, latewood vessel tangential diameter 35.52 &mu;m, ray width 197.19 &mu;m, ray height 4618.67 &mu;m, vessel length 498.85 &mu;m, fibre length 1.03 mm, fibre diameter 22.05 &mu;m, and fibre wall thickness 4.23 &mu;m. Based on the determined characteristics linked to the fibre quality, the fibres of the grapevine can be placed in Quality Class III for pulp and paper processing. All derived indices of grapevine met the acceptable threshold except for the flexibility ratio. Examining the anatomical structure of the grapevine will enable a database to be created for further studying of wood anatomy and these characteristics can be evaluated with respect to other possible areas of use.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135295511","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

Analiza utjecaja protupožarne obloge na bazi gipsa na pougljenje drvenih nosivih elemenata 石膏基防火材料对碎裂木承重构件老化的影响分析

4区农林科学

Drvna Industrija Pub Date : 2023-09-29 DOI: 10.5552/drvind.2023.0091

Marie Rusinová, Miloš Lavický, Miloš Kalousek, Martin Sedlmajer

引用次数: 0

Improving Surface Quality of Resin Impregnated Paper Used for Laminated Flooring Overlaid 提高复合地板用树脂浸渍纸的表面质量

4区农林科学

Drvna Industrija Pub Date : 2023-09-29 DOI: 10.5552/drvind.2023.0028

Meltem Cengiz, Ahmet Gençer, Tülin Gürkan Polat, Abdullah Sütçü

{"title":"Improving Surface Quality of Resin Impregnated Paper Used for Laminated Flooring Overlaid","authors":"Meltem Cengiz, Ahmet Gençer, Tülin Gürkan Polat, Abdullah Sütçü","doi":"10.5552/drvind.2023.0028","DOIUrl":"https://doi.org/10.5552/drvind.2023.0028","url":null,"abstract":"This study aimed to improve the quality properties of impregnated papers used as a coating material in wood-based composites, especially for high-density fiberboard (HDF) floorings, using the Taguchi method and parameter design. Three factors were evaluated in determining the interactions as they are considered the most important in affecting the product quality characteristics such as particle size of Al2O3, surface modification agent and melamine raw material. Experiments were conducted in three replications using the L18 (21 &times; 32) orthogonal array. Color and gloss measurements were evaluated together with the sensory analysis method, which takes into account the number of the spots in the sample as quality characteristics. The best values obtained as a result of statistical analysis were A2 for the melamine raw material, 30 to 60 &mu;m for the particle size and N-methyl-3-(trimethoxysilyl) propylamine for the surface modifier agent. Whether the experimental factors have a meaningful effect on the quality characteristics was also tested separately by analysis of variance. Only 58 % of the effect of the evaluated factors on the outcome could be expressed with the linear model (R2adj = 0.5785).","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135296209","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

A Gravity Model Analysis of Forest Products Trade Between Turkey and European Union Countries 土耳其与欧盟国家林产品贸易的重力模型分析

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-06-20 DOI: 10.5552/drvind.2023.0057

Henry Eric Magezi, T. Okan

引用次数: 0

Određivanje svojstava obradivosti toplinski modificiranog drva sibirskog bora (Pinus sibirica)

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-06-20 DOI: 10.5552/drvind.2023.0003

Umit Ergin, Sait Dundar Sofuoglu

{"title":"Određivanje svojstava obradivosti toplinski modificiranog drva sibirskog bora (Pinus sibirica)","authors":"Umit Ergin, Sait Dundar Sofuoglu","doi":"10.5552/drvind.2023.0003","DOIUrl":"https://doi.org/10.5552/drvind.2023.0003","url":null,"abstract":"The main objective of this study is to determine the effect of heat treatment on the machiningproperties of solid wood material and determine the optimum cutting parameters to obtain surfaces with minimum surface roughness. In line with this goal, Siberian pine (Pinus sibirica) wood species, widely used in the woodworking and furniture industry, was chosen as the experimental material. The heat-treated (at a temperature of 190 °C for 2 hours) and untreated samples were machined using two different cutters (carbide upcut milling cutter and carbide compression milling cutter) with 5 mm diameter at 1000, 1500 and 2000 mm/min feeds, 8000, 12000, 16000 rpm spindle speed, 50, 75 and 100 % stepover on the CNC machine. Surface roughness values (Ra and Rz) were measured to evaluate the obtained surfaces according to ISO 468 (2009), ISO 3274 (2005), and ISO 4287 (1997) using a contact profilometer. When the data was evaluated in general, the lowest roughness value for Ra occurred in upcut milling cutter, with 50% stepover, 12000 rpm, 1000 mm/min feed on untreated solid wood material. The highest roughness value for Ra occurred in a compression milling cutter, with 100 % stepover, 16000 rpm, 2000 mm/min feed on heat-treated solid wood material. It has been observed that the feed is the most critical parameter affecting the surface roughness.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44262711","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

Predviđanje adhezivne čvrstoće nekih lakova uz pomoć modela mekog računalstva 几种常用计算机模型对胶粘剂固化性的预测

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-06-20 DOI: 10.5552/drvind.2023.0029

Ibrahim Karaman, Kenan Kiliç, Cevdet Sögütlü

{"title":"Predviđanje adhezivne čvrstoće nekih lakova uz pomoć modela mekog računalstva","authors":"Ibrahim Karaman, Kenan Kiliç, Cevdet Sögütlü","doi":"10.5552/drvind.2023.0029","DOIUrl":"https://doi.org/10.5552/drvind.2023.0029","url":null,"abstract":"The purpose of this study was to predict the adhesion strength of the varnish, which is applied as a protective coating/finish on the surface of wooden material using soft computing models. In this study, the soft computing approaches were applied to oak (Quercus Petrea L.), chestnut (Castanea sativa M.), and scotch pine (Pinus sylvestris L.) with water-based, polyurethane, and acrylic varnishes. The adhesion strength of the varnish was determined in accordance with the Turkish Standard Institute-24624 and ASTM D4541. The outcome of the experiment was used to develop artificial neural network (ANN) and fuzzy logic (FL) prediction models. The total number of 360 data points was split as 80 % of training and 20 % of test for the model development. During the application of the ANN, 6 features were used as an input, while the adhesion strength was used as an output of the model. The coefficient of determination values (R2) for training and testing in the ANN models were 0.9939 and 0.9580, respectively. In the case of the ANFIS model, R2 values for training and testing were 0.9917 and 0.9929, respectively. Considering the MAPE, RMSE, and R2 values obtained from the results of both training and test values, it can be concluded that the ANFIS model showed a more successful performance in estimating varnish adhesion strength. Therefore, ANN and ANFIS have the potential to provide time and cost-efficient benefits in estimating wood adhesion strength.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46493111","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

Intermediate Role of Presenteeism in Relationship Between Organizational Stress and Organizational Silence 出勤在组织压力与组织沉默关系中的中介作用

IF 1.1 4区农林科学

Drvna Industrija Pub Date : 2023-06-20 DOI: 10.5552/drvind.2023.0046

Nadir Ersen, Ugur Can Usta, Bahadır Çağrı Bayram, I. Akyüz

{"title":"Intermediate Role of Presenteeism in Relationship Between Organizational Stress and Organizational Silence","authors":"Nadir Ersen, Ugur Can Usta, Bahadır Çağrı Bayram, I. Akyüz","doi":"10.5552/drvind.2023.0046","DOIUrl":"https://doi.org/10.5552/drvind.2023.0046","url":null,"abstract":"The purpose of this study is to investigate the mediating role of presenteeism in the relationship between organizational stress and organizational silence of 305 forest products employees in İstanbul and Kocaeli, Turkey. According to our literature review, although some important studies about presenteeism, stress, and silence can be found, this study is the first to explore the mediating role of presenteeism in the relationship between organizational stress and organizational silence in forest products sector. The research was designed as a field study and conducted using a questionnaire. The questionnaire involved forest industry employees’ demographic data, Organizational Stress Scale, Organizational Silence Scale, and Stanford Presenteeism Scale. Data were analyzed in SPSS and AMOS, incorporating statistical tests such as exploratory and confirmatory factor analysis, correlation analysis, and structural equation modeling. Results of the analyzed data showed that presenteeism had a significant moderating effect on the relationship between organizational stress and organizational silence. Moreover, organizational stress had a positive effect on presenteeism, while organizational silence had a negative effect. Organizational stress had no effect on organizational silence. Therefore, managers should develop strategies for coping with stress to reduce presenteeism behavior of their employees and identify organizational stress factors causing organizational silence.","PeriodicalId":11427,"journal":{"name":"Drvna Industrija","volume":null,"pages":null},"PeriodicalIF":1.1,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47062143","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