Pub Date : 2024-03-27DOI: 10.2339/politeknik.1443193
Zafer Deniz, M. Aktaş, Yaren Güven, Buğra Şensoy
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.
{"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":"23 4","pages":""},"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}
Pub Date : 2024-03-23DOI: 10.2339/politeknik.1456567
İhsan Toktaş
Bu çalışmada; eliptik delikli ince cidarlı küresel bir elemanın basınç altındaki davranışları Sonlu Elemanlar Analiz (SEA) yöntemi ile parametrik olarak analiz edilmiş ve Yapay Sinir Ağları (YSA) ile modellenmiştir. Modelleme esnasında, küresel elemanın yarıçapı 500 mm. olarak alınmış ve değişken parametrelere göre küresel elemana cidar kalınlığı verilmiştir. Küresel elemanın içinden boydan boya geçen yarıçapları a ve b olan eliptik bir delik tanımlanmıştır. Küresel elemanın iç yüzeyine sabit basınç gerilmesi uygulanmış ve elemanda oluşan gerilmeler ve gerilme yığılma faktörleri optimize edilmiştir. Parametrik modelden elde edilen sonuçlar bir YSA modelinde öğretilerek farklı boyut ve basınç değerleri için eliptik delikli ince cidarlı küresel bir elemanın gerilme, gerinim, deformasyon, gerilme yığılma faktörleri ve farklı teoremlere göre emniyet katsayıları belirlenmiştir.
本研究通过有限元分析（FEA）方法对带有椭圆孔的薄壁球形元件在压力下的行为进行了参数分析，并利用人工神经网络（ANN）进行了建模。在建模过程中，球形元件的半径取为 500 毫米，壁厚根据可变参数赋予球形元件。一个半径为 a 和 b 的椭圆形孔穿过球形元件。在球形元素的内表面施加恒定的压应力，并对应力和应力集中因子进行优化。在 ANN 模型中学习了参数模型得到的结果，并根据不同的定理确定了带椭圆孔的薄壁球形元件在不同尺寸和压力值下的应力、应变、变形、应力集中系数和安全系数。
{"title":"Eliptik Delikli İnce Cidarlı Küresel Bir Elemanın Basınç Altında Gerilme Yığılma Faktörünün Sonlu Elemanlar Analizi Ve Yapay Sinir Ağları İle Modellenmesi","authors":"İhsan Toktaş","doi":"10.2339/politeknik.1456567","DOIUrl":"https://doi.org/10.2339/politeknik.1456567","url":null,"abstract":"Bu çalışmada; eliptik delikli ince cidarlı küresel bir elemanın basınç altındaki davranışları Sonlu Elemanlar Analiz (SEA) yöntemi ile parametrik olarak analiz edilmiş ve Yapay Sinir Ağları (YSA) ile modellenmiştir. Modelleme esnasında, küresel elemanın yarıçapı 500 mm. olarak alınmış ve değişken parametrelere göre küresel elemana cidar kalınlığı verilmiştir. Küresel elemanın içinden boydan boya geçen yarıçapları a ve b olan eliptik bir delik tanımlanmıştır. Küresel elemanın iç yüzeyine sabit basınç gerilmesi uygulanmış ve elemanda oluşan gerilmeler ve gerilme yığılma faktörleri optimize edilmiştir. Parametrik modelden elde edilen sonuçlar bir YSA modelinde öğretilerek farklı boyut ve basınç değerleri için eliptik delikli ince cidarlı küresel bir elemanın gerilme, gerinim, deformasyon, gerilme yığılma faktörleri ve farklı teoremlere göre emniyet katsayıları belirlenmiştir.","PeriodicalId":16884,"journal":{"name":"Journal of Polytechnic","volume":" 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140386820","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}
Pub Date : 2024-03-20DOI: 10.2339/politeknik.1386758
Abdullah Çelik, C. O. Azeloğlu
ABSTRACT Earthquakes 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.
{"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":" 14","pages":""},"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}
Pub Date : 2024-03-16DOI: 10.2339/politeknik.1325468
Funda Kahraman, Mehmet Küçük
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%.
{"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":" 9","pages":""},"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}
Pub Date : 2024-03-14DOI: 10.2339/politeknik.1439690
M. F. Cakir, Mustafa Karhan, F. Issi
The wettability behavior is crucial in determining the materials' applications and durability. To assess the wettability behavior, the measurement of contact angle is utilized. In this study, commercially produced PVC profiles were sampled, and a contact angle measurement system, consisting of both software and hardware, was developed to measure the contact angle of the samples. The contact angle measurements were conducted by placing approximately 20 µl of distilled water on the samples, and each sample was measured six times, with the average being taken. A device for measuring roughness was used to determine the surface roughness of the samples, and the average roughness value was obtained from four different parts of each sample. Additionally, SEM images of each sample were taken to conduct surface and structural analyses. The correlation between roughness, SEM image analysis results, and contact angle was examined in the research study. Moreover, the wettability behavior of PVC materials was analyzed by evaluating the impact of the elements in their structure and their homogeneity on the contact angle values.
{"title":"Investigation of Structural Properties and Wettability Behavior of Polyvinyl Chloride Building Materials","authors":"M. F. Cakir, Mustafa Karhan, F. Issi","doi":"10.2339/politeknik.1439690","DOIUrl":"https://doi.org/10.2339/politeknik.1439690","url":null,"abstract":"The wettability behavior is crucial in determining the materials' applications and durability. To assess the wettability behavior, the measurement of contact angle is utilized. In this study, commercially produced PVC profiles were sampled, and a contact angle measurement system, consisting of both software and hardware, was developed to measure the contact angle of the samples. The contact angle measurements were conducted by placing approximately 20 µl of distilled water on the samples, and each sample was measured six times, with the average being taken. A device for measuring roughness was used to determine the surface roughness of the samples, and the average roughness value was obtained from four different parts of each sample. Additionally, SEM images of each sample were taken to conduct surface and structural analyses. The correlation between roughness, SEM image analysis results, and contact angle was examined in the research study. Moreover, the wettability behavior of PVC materials was analyzed by evaluating the impact of the elements in their structure and their homogeneity on the contact angle values.","PeriodicalId":16884,"journal":{"name":"Journal of Polytechnic","volume":"21 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140243376","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}
Pub Date : 2024-03-06DOI: 10.2339/politeknik.1110050
Burak Dökmetaş, Nursel Akçam
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.
随着卫星通信系统的发展，低噪声放大器（LNA）及其子系统越来越受到关注。低噪声放大器子系统通过放大卫星通信中的低功率信号，在将噪声保持在最低水平方面发挥着重要作用。本研究为卫星通信应用设计了一种频带为 8025-8400 MHz 的两级低噪声放大器。设计中采用了微带技术和基于 RT5880 基板的 CE3512K2 晶体管。在设计中，匹配电路是通过微带线和封装射频（RF）材料实现的。根据所开发低噪声放大器电路的 S 参数测量结果，输入和输出背反射系数分别优于 -14 dB 和 -15 dB。测量增益值优于 21.9 dB。此外，在 40 mW 功耗条件下，2 级 LNA 电路在工作频带内的噪声系数值小于 1.1 dB，1 dB 抑制点的输出功率为 +14.6 dBm。
{"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":"13 1","pages":""},"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}
Pub Date : 2024-03-02DOI: 10.2339/politeknik.1427665
Uğur Arabaci
In this study, 1.4718 coded steel surface, which is used especially in the manufacture of automotive valves, is coated with cobalt-based Stellite 1, Stellite F, Stellite 6, and Nickel 60 alloys by the TIG welding method. The samples coated with the specified welding parameters were abraded for 4400 meters on a metal abrasive disc under 10, 25, and 40 N loads, at room temperature and 300 0C. The weight losses of the samples were measured every 1100 meters, and their wear resistance was investigated. It has been determined that the experimental study results and fuzzy logic estimations overlap with each other, and fuzzy logic estimations can be used to determine the wear behavior in the intermediate values that were not tested.
{"title":"STELLİT KAPLAMALI VALF YÜZEYLERİNİN ODA SICAKLIĞINDA VE 300 0C'DE ADHESİF AŞINMA DAVRANIŞININ BULANIK MANTIK YÖNTEMİ İLE ANALİZİ","authors":"Uğur Arabaci","doi":"10.2339/politeknik.1427665","DOIUrl":"https://doi.org/10.2339/politeknik.1427665","url":null,"abstract":"In this study, 1.4718 coded steel surface, which is used especially in the manufacture of automotive valves, is coated with cobalt-based Stellite 1, Stellite F, Stellite 6, and Nickel 60 alloys by the TIG welding method. The samples coated with the specified welding parameters were abraded for 4400 meters on a metal abrasive disc under 10, 25, and 40 N loads, at room temperature and 300 0C. The weight losses of the samples were measured every 1100 meters, and their wear resistance was investigated. It has been determined that the experimental study results and fuzzy logic estimations overlap with each other, and fuzzy logic estimations can be used to determine the wear behavior in the intermediate values that were not tested.","PeriodicalId":16884,"journal":{"name":"Journal of Polytechnic","volume":"23 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140081808","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}
Pub Date : 2024-03-01DOI: 10.2339/politeknik.1332952
M. Ozdemir, Davut Hanbay
Face detection and tracking have become increasingly popular in recent years. It has critical importance in security, defense, and robotics applications uses encountered in everyday life. For this purpose, many decision support or expert systems have been developed using artificial intelligence and machine learning. Thanks to the developments in the field of deep learning and hardware many effective and reliable face tracking systems have been realized. However there are still very few real-time scalable end-to-end systems. Also, the realization of this system on multiple cameras is a real challenge. In this study, a real-time, multi-camera, deep learning-based face tracking system has been developed. In the realized system, SCRFD model is used for face detection, ArcFace model is used for face recognition, and an updated DeepSORT algorithm is used for more stable face tracking. In addition, Apache Kafka stream processing system and Socket.IO bidirectional communication library were used to process multi-camera data in real-time and scalable. In the proposed system, when an image is input into the system, it can be displayed on the web page after approximately 127 ms
{"title":"Real-Time Scalable System For Face Tracking In Multi-Camera","authors":"M. Ozdemir, Davut Hanbay","doi":"10.2339/politeknik.1332952","DOIUrl":"https://doi.org/10.2339/politeknik.1332952","url":null,"abstract":"Face detection and tracking have become increasingly popular in recent years. It has critical importance in security, defense, and robotics applications uses encountered in everyday life. For this purpose, many decision support or expert systems have been developed using artificial intelligence and machine learning. Thanks to the developments in the field of deep learning and hardware many effective and reliable face tracking systems have been realized. However there are still very few real-time scalable end-to-end systems. Also, the realization of this system on multiple cameras is a real challenge. In this study, a real-time, multi-camera, deep learning-based face tracking system has been developed. In the realized system, SCRFD model is used for face detection, ArcFace model is used for face recognition, and an updated DeepSORT algorithm is used for more stable face tracking. In addition, Apache Kafka stream processing system and Socket.IO bidirectional communication library were used to process multi-camera data in real-time and scalable. In the proposed system, when an image is input into the system, it can be displayed on the web page after approximately 127 ms","PeriodicalId":16884,"journal":{"name":"Journal of Polytechnic","volume":"224 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140270837","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}
Pub Date : 2024-02-20DOI: 10.2339/politeknik.1430431
Hafize Nurgül DURMUŞ ŞENYAPAR, Kenan Ünal, Filiz Kardiyen
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.
{"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":"453 1","pages":""},"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}
Pub Date : 2024-02-19DOI: 10.2339/politeknik.1428444
Uğur Arabaci
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.
{"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":"100 22","pages":""},"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}
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