Journal of Polytechnic最新文献

Güneş Enerjisi Destekli Enerji Depolamalı Yeni Nesil Eko Kurutucu Tasarımı 采用太阳能辅助储能技术的新一代生态干燥机设计

Journal of Polytechnic Pub Date : 2024-03-27 DOI: 10.2339/politeknik.1443193

Zafer Deniz, M. Aktaş, Yaren Güven, Buğra Şensoy

{"title":"Güneş Enerjisi Destekli Enerji Depolamalı Yeni Nesil Eko Kurutucu Tasarımı","authors":"Zafer Deniz, M. Aktaş, Yaren Güven, Buğra Şensoy","doi":"10.2339/politeknik.1443193","DOIUrl":"https://doi.org/10.2339/politeknik.1443193","url":null,"abstract":"Gerçekleştirilen bu çalışmada sadece güneş enerjisinin kullanıldığı, enerjinin depolandığı ve sistemdeki atık ısının geri kazanıldığı bir eko kurutma sistemi tasarlanmıştır. Kurutulacak ürün türüne göre sıcaklık ve bağıl nem kontrolü yapılarak çalışma modunun belirlendiği bu tasarımda, belirlenen mod ile üründe oluşabilecek kusurlar ve kurutma süresi azaltılabilecektir. Farklı çalışma modları ile güneş enerjisinden maksimum fayda sağlanacak, güneş enerjisinden yararlanılmadığı zamanlarda ise depolanan enerjinin kullanımı ile hem enerji tasarrufu sağlanacak hem de CO2 salımı azaltılacaktır. Yeni nesil eko kurutma sistemi ile kurutma işleminin devamlılığı sağlanarak, atık ısı desteğiyle enerji verimliliği arttırılacaktır. Güneşin kesikli olduğu zamanlarda da kurutma devam ettirilerek güneş enerjisi desteğiyle arzu edilen kalitede kurutulmuş ürün elde edilebilecektir. Çevreci ve sürdürülebilir bir yapıya sahip olan yeni nesil eko kurutucu, karbon ayak izini küçülterek Paris İklim Anlaşması’nın hedeflerinin gerçekleşmesine katkı sağlayacaktır.","PeriodicalId":16884,"journal":{"name":"Journal of Polytechnic","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140375301","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

Eliptik Delikli İnce Cidarlı Küresel Bir Elemanın Basınç Altında Gerilme Yığılma Faktörünün Sonlu Elemanlar Analizi Ve Yapay Sinir Ağları İle Modellenmesi 利用有限元分析和人工神经网络模拟带椭圆孔的薄壁球形元件在压力下的应力累积系数

Journal of Polytechnic Pub Date : 2024-03-23 DOI: 10.2339/politeknik.1456567

İhsan Toktaş

引用次数: 0

Use of Friction Pendulum System for Seismic Isolation of Museum Artifacts: Mathematical Modeling and Parametric Study 使用摩擦摆系统对博物馆文物进行隔震：数学建模和参数研究

Journal of Polytechnic Pub Date : 2024-03-20 DOI: 10.2339/politeknik.1386758

Abdullah Çelik, C. O. Azeloğlu

{"title":"Use of Friction Pendulum System for Seismic Isolation of Museum Artifacts: Mathematical Modeling and Parametric Study","authors":"Abdullah Çelik, C. O. Azeloğlu","doi":"10.2339/politeknik.1386758","DOIUrl":"https://doi.org/10.2339/politeknik.1386758","url":null,"abstract":"ABSTRACT \u0000Earthquakes seriously threaten precious artifacts in museums worldwide. Many historical pieces of inestimable importance that are considered the common heritage of humanity have been damaged by earthquakes. Robust measures must be put in place to protect museum artifacts from the perils associated with seismic risks. Seismic isolation devices like spherically shaped bearings are one of the best options to prevent seismic damage of museum artifacts thanks to achieving a long period under low weights. Therefore, the objective of this research is to assess the effectiveness of friction pendulum-type isolators, one of the spherically shaped bearings, in seismic isolation of museum artifacts and to identify the appropriate design parameters. In this study, a non-isolated single-degree-of-freedom model and a 2-degree-of-freedom model isolated with a single friction pendulum bearing inside a building were established for a museum artifact. A parametric study was conducted using the root mean square and the maximum accelerations and displacements of the isolated mass at different values of friction coefficient and effective radius of curvature, as well as the maximum displacement of the friction pendulum system. Afterward, the non-isolated and isolated mass responses were compared in the time domain based on selected parameters obtained from the parametric study. The behavior of the isolator was analyzed, and its effectiveness was evaluated.","PeriodicalId":16884,"journal":{"name":"Journal of Polytechnic","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140388415","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

Finite Elements Analysis and Topology Optimization of Parking Brake Lever and Ratchet 驻车制动杆和棘轮的有限元分析与拓扑优化

Journal of Polytechnic Pub Date : 2024-03-16 DOI: 10.2339/politeknik.1325468

Funda Kahraman, Mehmet Küçük

{"title":"Finite Elements Analysis and Topology Optimization of Parking Brake Lever and Ratchet","authors":"Funda Kahraman, Mehmet Küçük","doi":"10.2339/politeknik.1325468","DOIUrl":"https://doi.org/10.2339/politeknik.1325468","url":null,"abstract":"Topology optimization is known as one of the basic categories of structural optimization. Topology optimization is received increasing attention in many engineering disciplines. Topology optimization contributes to minimizing emissions and environmental effects by increasing material utilization efficiency and manufacturing sustainability. The mechanical parking brake is still used in many vehicles. This study aims to contribute to the reduction in vehicle weight by applying topology optimization. In addition, it also purposes to promote sustainability in manufacturing by reducing material usage and energy consumption. A CAD model was created by considering the existing mechanism element dimensions. The parking brake lever mechanism component was evaluated using topology optimization and finite element analysis methods. Static analyses were performed using a finite element analysis program. The results of this analysis were used as input data for topology optimization. In the topology optimization, the response constraint mass was increased by 5 increments from 50% to 95%. As a result, the maximum equivalent (von Mises) stress for the parking brake lever is 230,29 MPa, and for the ratchet is 11,559 MPa. The maximum total deformation value for the brake lever is 0,95853 mm and for the ratchet is 0,0079482 mm. The parking brake lever mass decreased by 18,48% from 0.27751 kg to 0.22622 kg. The ratchet mass decreased from 0.095042 kg to 0.061911 kg by 34.85%.","PeriodicalId":16884,"journal":{"name":"Journal of Polytechnic","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140391212","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

Investigation of Structural Properties and Wettability Behavior of Polyvinyl Chloride Building Materials 聚氯乙烯建筑材料的结构特性和润湿行为研究

Journal of Polytechnic Pub Date : 2024-03-14 DOI: 10.2339/politeknik.1439690

M. F. Cakir, Mustafa Karhan, F. Issi

引用次数: 0

Uydu Haberleşme Sistemleri için 8025-8400 MHz Düşük Gürültülü Kuvvetlendirici Tasarımı 用于卫星通信系统的 8025-8400 MHz 低噪声放大器设计

Journal of Polytechnic Pub Date : 2024-03-06 DOI: 10.2339/politeknik.1110050

Burak Dökmetaş, Nursel Akçam

{"title":"Uydu Haberleşme Sistemleri için 8025-8400 MHz Düşük Gürültülü Kuvvetlendirici Tasarımı","authors":"Burak Dökmetaş, Nursel Akçam","doi":"10.2339/politeknik.1110050","DOIUrl":"https://doi.org/10.2339/politeknik.1110050","url":null,"abstract":"Gelişen uydu haberleşme sistemleri ile birlikte düşük gürültülü kuvvetlendirici (Low Noise Amplifier-LNA) ve alt sistemlerine gösterilen ilgi her geçen gün artmaktadır. Düşük gürültülü kuvvetlendirici alt sistemleri uydu haberleşmesinde düşük güçlü sinyalleri kuvvetlendirerek gürültü seviyesini en düşük seviyede tutmakta önemli bir rol oynamaktadır. Bu çalışma kapsamında, uydu haberleşme uygulamalarında kullanılabilecek 8025-8400 MHz frekans bandına sahip iki katlı düşük gürültülü kuvvetlendirici tasarımı gerçekleştirilmiştir. Tasarımda RT5880 alttaşı üzerine mikroşerit teknolojisi ve CE3512K2 transistörü kullanılmıştır. Tasarımda uyumlama devreleri mikroşerit hatlar ve paketli radyo frekansı (Radio Frequency-RF) malzemeleri ile gerçeklenmiştir. Geliştirilen LNA devresinin S-parametresi ölçüm sonuçlarına göre, giriş ve çıkış geri yansıma katsayıları sırasıyla -14 dB ve -15 dB’den daha iyi olduğu görülmüştür. Ölçülen kazanç değeri ise 21.9 dB’den iyi olarak elde edilmiştir. Ek olarak, 2 katlı LNA devresinin 40 mW güç tükettiği durumda gürültü figürü değerinin çalışma bandı içerisinde 1.1 dB’den düşük olduğu ve 1-dB bastırma noktasındaki çıkış gücünün ise +14.6 dBm olduğu görülmüştür.","PeriodicalId":16884,"journal":{"name":"Journal of Polytechnic","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140261166","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

STELLİT KAPLAMALI VALF YÜZEYLERİNİN ODA SICAKLIĞINDA VE 300 0C'DE ADHESİF AŞINMA DAVRANIŞININ BULANIK MANTIK YÖNTEMİ İLE ANALİZİ 用模糊逻辑法分析卫星涂层阀门表面在室温和 300 0c 下的粘着磨损行为

Journal of Polytechnic Pub Date : 2024-03-02 DOI: 10.2339/politeknik.1427665

Uğur Arabaci

引用次数: 0

Real-Time Scalable System For Face Tracking In Multi-Camera 多摄像头人脸跟踪实时可扩展系统

Journal of Polytechnic Pub Date : 2024-03-01 DOI: 10.2339/politeknik.1332952

M. Ozdemir, Davut Hanbay

引用次数: 0

Enhancing Ecological Footprint Awareness among Academic Staff at Gazi University: A Sustainability Communication Approach 提高加齐大学教职员工的生态足迹意识：可持续性交流方法

Journal of Polytechnic Pub Date : 2024-02-20 DOI: 10.2339/politeknik.1430431

Hafize Nurgül DURMUŞ ŞENYAPAR, Kenan Ünal, Filiz Kardiyen

{"title":"Enhancing Ecological Footprint Awareness among Academic Staff at Gazi University: A Sustainability Communication Approach","authors":"Hafize Nurgül DURMUŞ ŞENYAPAR, Kenan Ünal, Filiz Kardiyen","doi":"10.2339/politeknik.1430431","DOIUrl":"https://doi.org/10.2339/politeknik.1430431","url":null,"abstract":"Sustainability communication is vital in informing, inspiring, and mobilizing individuals and organizations to take collective actions that contribute to environmental protection, social justice, and economic prosper-ity. A crucial aspect of sustainability, ecological footprint awareness assesses the consciousness of the im-pact of individuals or communities on the environment. This research investigates the level of ecological footprint awareness among academic staff at Gazi University, Turkey, using a comprehensive scale. Find-ings indicate varying levels of awareness across dimensions influenced by gender, marital status, academic title, and income, suggesting potential implications for policymakers and university administrators. The efficacy of sustainability and ecological footprint reduction initiatives can be increased among heteroge-neous cohorts of academic personnel by implementing customized communications and awareness initia-tives. Additional investigation may further elucidate the precise determinants underlying these disparities and scrutinize the most efficacious modes of communication for each faction, thereby augmenting the sus-tainability discourse at Gazi University and in the broader context.","PeriodicalId":16884,"journal":{"name":"Journal of Polytechnic","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140446679","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

Yakma Alın Kaynağıyla Birleştirilmiş S355jr Yapı Çeliklerinde ITAB’ın Ansys ile Analizi 用 Ansys 分析 S355jr 结构钢燃烧对接焊缝中的 ITAB

Journal of Polytechnic Pub Date : 2024-02-19 DOI: 10.2339/politeknik.1428444

Uğur Arabaci

{"title":"Yakma Alın Kaynağıyla Birleştirilmiş S355jr Yapı Çeliklerinde ITAB’ın Ansys ile Analizi","authors":"Uğur Arabaci","doi":"10.2339/politeknik.1428444","DOIUrl":"https://doi.org/10.2339/politeknik.1428444","url":null,"abstract":"In this study, we focus on predicting the HAZ, which is a region whose mechanical properties are not clearly known, by modeling factors such as temperature input and heat turbulence, which may have different properties in the welding region. This is important for the safety of welded structures, because if the mechanical and thermal properties of these structures, which are used in many areas, can be determined in advance, they can be used more safely. In the study, flash butt welding method was preferred and holes were opened at regular intervals in the samples that were brought to appropriate dimensions for the welding process, and temperature values were measured and recorded using thermocouples and data loggers during the welding process. Additionally, the maximum temperature reached in the welding area was measured using a thermal camera during welding. Microstructural changes occurring in the joining regions of the welded test pieces were examined using light microscopy and scanning electron microscopy (SEM). Micro hardness measurements were made to determine mechanical properties. Using the ANSYS program, three-dimensional models were created using the finite element method under the same experimental conditions and compared with the experimental results. As a result of this comparison, it was seen that the findings were compatible with the actual results. For this reason, it is emphasized that the use of simulation programs is important to predict the properties of welded structures and possible problems.","PeriodicalId":16884,"journal":{"name":"Journal of Polytechnic","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140451188","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