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Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering最新文献

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REUSABLE FABRIC MASKS AGAINST COVID-19 可重复使用的织物口罩
Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering Pub Date : 2021-11-07 DOI: 10.18038/estubtda.976780
M. E. Üreyen, Nuran Zari̇f, Elif KAYNAK URAZ
{"title":"REUSABLE FABRIC MASKS AGAINST COVID-19","authors":"M. E. Üreyen, Nuran Zari̇f, Elif KAYNAK URAZ","doi":"10.18038/estubtda.976780","DOIUrl":"https://doi.org/10.18038/estubtda.976780","url":null,"abstract":"Upon the outbreak of the COVID-19, community wide mask wearing has become an important tool to prevent the spread of the virus. The use of disposable masks -that are generally produced of three or more layers of synthetic nonwovens-by the general public is being questioned from an environmental and waste perspective. Conventional textile fabrics, on the other hand, may not provide the desired level of protection against the virus. In this study three layer fabric mask structures having a middle layer of nonwoven (100 g/m 2 or 120 g/m 2 ) sandwiched between knitted polyester fabrics were prepared. The particle filtration and breathability properties of the fabric assemblies were investigated. In order to prevent bacterial growth and enable safer use, the outer layer was antibacterial and water repellent functionalized. The middle layer was also antibacterial treated. The air permeability of the three layer fabric structure with an antibacterial nonwoven (100 g/m 2 ) middle layer and an antibacterial and water repellent outer layer was ≥ 96 l/m²/s. The particle filtration efficiency was 23% when tested for 0.3 µm NaCl aerosol particles. The particle filtration efficiency was not reduced after washing up to 20 cycles","PeriodicalId":436776,"journal":{"name":"Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133436476","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
THERMOFORMING PROCESS PARAMETER OPTIMIZATION OF THERMOPLASTIC PEKK/CF and PPS 热塑性PEKK/CF和PPS热成型工艺参数优化
Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering Pub Date : 2021-11-06 DOI: 10.18038/estubtda.981572
Merve Çobanoğlu, R. E. Ece, F. Öztürk
{"title":"THERMOFORMING PROCESS PARAMETER OPTIMIZATION OF THERMOPLASTIC PEKK/CF and PPS","authors":"Merve Çobanoğlu, R. E. Ece, F. Öztürk","doi":"10.18038/estubtda.981572","DOIUrl":"https://doi.org/10.18038/estubtda.981572","url":null,"abstract":"","PeriodicalId":436776,"journal":{"name":"Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121503782","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
MECHANICAL PERFORMANCE OF CARBON - ARAMID FIBER-REINFORCED LAMINATED COMPOSITES UNDER IMPACT AND SHEAR LOADING 碳芳纶纤维增强层合复合材料在冲击和剪切载荷下的力学性能
Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering Pub Date : 2021-11-05 DOI: 10.18038/estubtda.977657
Beyza Nur Atmaca, Ramazan Oruç, Görkem Aşci, Kadir Yi̇ği̇t, Serkan Yüzer, Y. Polat, B. Ekici
{"title":"MECHANICAL PERFORMANCE OF CARBON - ARAMID FIBER-REINFORCED LAMINATED COMPOSITES UNDER IMPACT AND SHEAR LOADING","authors":"Beyza Nur Atmaca, Ramazan Oruç, Görkem Aşci, Kadir Yi̇ği̇t, Serkan Yüzer, Y. Polat, B. Ekici","doi":"10.18038/estubtda.977657","DOIUrl":"https://doi.org/10.18038/estubtda.977657","url":null,"abstract":"","PeriodicalId":436776,"journal":{"name":"Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121119839","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
The Characterization and Modeling of Cobalt Ions Adsorption on Pumice 浮石吸附钴离子的表征与模拟
Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering Pub Date : 2021-10-18 DOI: 10.18038/estubtda.796457
E. Çiçek
{"title":"The Characterization and Modeling of Cobalt Ions Adsorption on Pumice","authors":"E. Çiçek","doi":"10.18038/estubtda.796457","DOIUrl":"https://doi.org/10.18038/estubtda.796457","url":null,"abstract":"","PeriodicalId":436776,"journal":{"name":"Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124883899","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
URBAN TRANSFORMATION PROGRESS OF REINFORCED CONCRETE (RC) AND MASONRY-MIXED BUILDINGS IN ISTANBUL 伊斯坦布尔钢筋混凝土和砖混建筑的城市改造进展
Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering Pub Date : 2021-09-29 DOI: 10.18038/estubtda.998114
Cigdem Avci-Karatas, Hakan Çatalkaya
{"title":"URBAN TRANSFORMATION PROGRESS OF REINFORCED CONCRETE (RC) AND MASONRY-MIXED BUILDINGS IN ISTANBUL","authors":"Cigdem Avci-Karatas, Hakan Çatalkaya","doi":"10.18038/estubtda.998114","DOIUrl":"https://doi.org/10.18038/estubtda.998114","url":null,"abstract":"","PeriodicalId":436776,"journal":{"name":"Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127880564","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
ESTIMATION OF DAILY CASES OF COVID-19 AND REPRODUCTİON NUMBER IN USA, GERMANY, INDIA, RUSSIA, ITALY, SPAIN, FRANCE, UNITED KINGDOM, BRAZIL USING DISCRETE TIME GOMPERTZ MODEL AND ADAPTIVE KALMAN FILTER 用离散时间gompertz模型和自适应卡尔曼滤波估计美国、德国、印度、俄罗斯、意大利、西班牙、法国、英国、巴西的COVID-19日病例数和reproductİon数
Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering Pub Date : 2021-09-14 DOI: 10.18038/estubtda.840307
Levent Özbek, H. Demirtas
{"title":"ESTIMATION OF DAILY CASES OF COVID-19 AND REPRODUCTİON NUMBER IN USA, GERMANY, INDIA, RUSSIA, ITALY, SPAIN, FRANCE, UNITED KINGDOM, BRAZIL USING DISCRETE TIME GOMPERTZ MODEL AND ADAPTIVE KALMAN FILTER","authors":"Levent Özbek, H. Demirtas","doi":"10.18038/estubtda.840307","DOIUrl":"https://doi.org/10.18038/estubtda.840307","url":null,"abstract":"","PeriodicalId":436776,"journal":{"name":"Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121770499","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
COMPARATIVE STUDY OF FUNCTIONALLY GRADED MATERIAL MODELS FOR STRUCTURAL DESIGN OF THIN-WALLED BLADES 薄壁叶片结构设计功能梯度材料模型对比研究
Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering Pub Date : 2021-09-14 DOI: 10.18038/estubtda.867690
T. Farsadi
{"title":"COMPARATIVE STUDY OF FUNCTIONALLY GRADED MATERIAL MODELS FOR STRUCTURAL DESIGN OF THIN-WALLED BLADES","authors":"T. Farsadi","doi":"10.18038/estubtda.867690","DOIUrl":"https://doi.org/10.18038/estubtda.867690","url":null,"abstract":"In this work, three theories of Functionally Graded Material (FGM) are compared for structural dynamic and static performance of the thin-walled rotating blade. For this purpose, the pretwisted Thin Wall Rotating Beam (TWRB) with a fixed angular velocity is considered. The goal is to find the desirable FG model with improved free vibration, static deformation, and buckling behavior of the FGM blades. The Euler–Lagrange equations of motion of the energetic system are extracted utilizing Hamilton's principle. The Extended Galerkin`s Method (EGM) is used to solve the governing equation of motions. The effects of some parameters, such as the FGM models, angular velocity, and pretwist angle on the mechanical behavior of the FG beams are studied.","PeriodicalId":436776,"journal":{"name":"Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123717360","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
DEVELOPING A DECISION SUPPORT SYSTEM FOR EXAM SCHEDULING PROBLEM USING GENETIC ALGORITHM 基于遗传算法的考试调度决策支持系统的开发
Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering Pub Date : 2021-09-13 DOI: 10.18038/estubtda.890307
Ahmet Doğan, Ahmet Yurtsal
{"title":"DEVELOPING A DECISION SUPPORT SYSTEM FOR EXAM SCHEDULING PROBLEM USING GENETIC ALGORITHM","authors":"Ahmet Doğan, Ahmet Yurtsal","doi":"10.18038/estubtda.890307","DOIUrl":"https://doi.org/10.18038/estubtda.890307","url":null,"abstract":"","PeriodicalId":436776,"journal":{"name":"Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125908713","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
ANALYSIS OF ONLINE SHOPPING BEHAVIORS DURING COVID 19 PANDEMIC: ANKARA CASE 新冠肺炎大流行期间网上购物行为分析:安卡拉病例
Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering Pub Date : 2021-09-12 DOI: 10.18038/estubtda.962633
Burcu Yılmazel, Müzeyyen Anıl Şenyel Kürkçüoğlu, Tuğrul Hocaoğlu, S. Cabuk, Bulent Gunsoy, A. Çabuk
{"title":"ANALYSIS OF ONLINE SHOPPING BEHAVIORS DURING COVID 19 PANDEMIC: ANKARA CASE","authors":"Burcu Yılmazel, Müzeyyen Anıl Şenyel Kürkçüoğlu, Tuğrul Hocaoğlu, S. Cabuk, Bulent Gunsoy, A. Çabuk","doi":"10.18038/estubtda.962633","DOIUrl":"https://doi.org/10.18038/estubtda.962633","url":null,"abstract":"The COVID-19 pandemic has caused noticeable changes when it comes to the consumption and purchasing behaviors of customers and the increase in online shopping besides various fields such as health, education, and transportation. Within this context, the goal of this study is to determine the relations between the online shopping, shopping locations, and the 3 particular time intervals during the COVID-19 pandemic in Turkey, which were set to represent the pre-pandemic, pandemic, and new normal periods, in 2020. Correspondingly, the purpose of the study is to reveal the differences among the essential pandemic periods in the country and the selected geographic context regarding online food and non-food expenditures. To fulfill this aim, the online shopping data of Marketyo were processed and a sample of 979 observations from 7 districts of Ankara province was analyzed via two factor ANOVA method to determine the effects of pandemic periods and chosen districts on online food/non-food expenditures. The results revealed a significant statistical difference in mean food and non-food expenditures among both periods and districts. The highest amount of food and non-food expenditures were recorded mostly in Etimesgut, Çankaya, and Keçiören districts during Period-2, while the lowest was in Altındağ, Mamak, and Sincan districts during Period-1. According to the Turkey HSD test results, Sincan differed from all the other districts, as the lowest online market spending rate was recorded in this district. The results are assumed to be in line with the socio-economic development levels of the districts, as well as other issues such as internet accessibility, availability of technological devices, and geographical factors. The findings of this study are supposed to provide guidance for further studies for the determination of the pandemic on online shopping behaviors and patterns, as well as their geospatial relations.","PeriodicalId":436776,"journal":{"name":"Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130214649","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
Temperature-Driven Evaporation Analysis over Ballikaya Catchment Ballikaya流域温度驱动蒸发分析
Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering Pub Date : 2021-09-07 DOI: 10.18038/estubtda.911741
Adnan Elagca, M. O. Dis
{"title":"Temperature-Driven Evaporation Analysis over Ballikaya Catchment","authors":"Adnan Elagca, M. O. Dis","doi":"10.18038/estubtda.911741","DOIUrl":"https://doi.org/10.18038/estubtda.911741","url":null,"abstract":"","PeriodicalId":436776,"journal":{"name":"Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122285226","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
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