Scopus İndeksli Yayınlar / Scopus Indexed PublicationsScopus İndeksli Yayınlar koleksiyonuna ait yayınları içerir.https://hdl.handle.net/11352/34712024-03-28T23:19:36Z2024-03-28T23:19:36ZDevelopment of an Alternative Heat Treatment to the Traditional T6 Heat Treatment of AlSi10Mg Alloy Produced by Additive ManufacturingTütük, İbrahimUral, Mehmet MoğoltayYılmaz, Mustafa SafaÖzer, Gökhanhttps://hdl.handle.net/11352/48802024-03-22T09:59:44Z2024-01-01T00:00:00ZDevelopment of an Alternative Heat Treatment to the Traditional T6 Heat Treatment of AlSi10Mg Alloy Produced by Additive Manufacturing
Tütük, İbrahim; Ural, Mehmet Moğoltay; Yılmaz, Mustafa Safa; Özer, Gökhan
In this study, alternative solution heat treatments, applied at lower temperatures and shorter times, were
applied to AlSI10Mg samples produced with the powder bed laser fusion technique. Thermocalc software
was used to determine the temperatures of the NT6 solution heat treatment. The samples were analyzed by
optical microscope, scanning electron microscope, energy-dispersive x-ray analysis, x-ray diffractometer
and their mechanical behavior was examined. The results were compared with traditional T6 heat treatments
and it was determined that the samples showed better ductility after NT6 heat treatments while
maintaining the strength values in the traditional method.
2024-01-01T00:00:00ZA Bi-Objective Traffic Signal Optimization Model for Mixed Traffic Concerning Pedestrian DelaysAkyol, GörkemSilgu, Mehmet AliÇelikoğlu, Hilmi BerkGöncü, Sadullahhttps://hdl.handle.net/11352/48792024-03-22T09:58:02Z2024-01-01T00:00:00ZA Bi-Objective Traffic Signal Optimization Model for Mixed Traffic Concerning Pedestrian Delays
Akyol, Görkem; Silgu, Mehmet Ali; Çelikoğlu, Hilmi Berk; Göncü, Sadullah
Urban traffic networks suffer in numerous ways from traffic congestion. Some of these adverse effects are increased travel times
of cars, buses, bicycle users, pedestrians etc., with the addition of excessive greenhouse gas emissions. Transportation engineers
and policy makers try to improve the quality of urban transportation systems by developing projects to enhance the pedestrian
experience, reduce private car usage, reduce total time spent in the network through different control strategies, and diminish the
detrimental effects. In this context, this study takes Connected and Automated Vehicles (CAVs) and pedestrians into account at
signal-controlled intersections. A novel intersection signal control optimization methodology that incorporates pedestrian delays
and vehicular emissions from CAVs is presented. Non-dominated sorting genetic algorithm-II is utilized to solve the multiobjective
optimization problem. For the emission calculations, the MOVES3 emission model is utilized. The proposed framework is tested
on real-world case study. Simulation experiments showed major improvements in pedestrian delays and lower emissions.
2024-01-01T00:00:00ZExplosive Behavior in COVID-19 and Policy Responses: Lessons Learned for Public Health ManagementGündüz, LokmanAysan, Ahmet FarukBağcı, Rıfgı BuğraKarahan, Haticehttps://hdl.handle.net/11352/48112024-03-15T06:53:06Z2024-01-01T00:00:00ZExplosive Behavior in COVID-19 and Policy Responses: Lessons Learned for Public Health Management
Gündüz, Lokman; Aysan, Ahmet Faruk; Bağcı, Rıfgı Buğra; Karahan, Hatice
Since the first case of COVID-19 in Turkey, there has been a lingering question as elsewhere in the world: ‘‘When will or
should the government impose severe restrictions to protect public health?’’ From a public health perspective, there is value in
developing a model to support proactive implementation of social policies. This study aimed to show the benefits of using a
novel econometric test (the Generalized Supremum Augmented Dickey-Fuller Test) to detect explosive behavior (bubbles) in
Turkey’s daily COVID-19 cases and deaths. Results from the analysis demonstrated a link between identified explosive episodes
and critical public health decisions, especially in the case of daily new deaths. They also showed a negative relationship
between the formation of exuberant behavior during the pandemic and the vaccination rate. Public health policymakers can
incorporate this method into their arsenal to evaluate the overall health situation in combating the pandemic and respond
accordingly. Furthermore, among the lessons learned from the Turkish experience is the importance of having a coronavirus
scientific advisory board in the decision-making process and the ability to promptly implement policy measures.
2024-01-01T00:00:00Zİslam Öncesi ve Sonrası ile Ayasofya Camii Geometrik Desenlerinin Mukayeseli AnaliziSönmez, Serap Ekizlerhttps://hdl.handle.net/11352/48102024-03-15T06:39:48Z2024-01-01T00:00:00Zİslam Öncesi ve Sonrası ile Ayasofya Camii Geometrik Desenlerinin Mukayeseli Analizi
Sönmez, Serap Ekizler
Bu çalışmada Ayasofya Camii’nde yer alan geometrik desenlerin pergel-cetvel (çizgilik) konstrüksiyonu ile çizimine ve
arkalarında yatan geometrik sistemlere odaklanılmıştır. Neredeyse tüm İslam coğrafyasında sayısız örnekle ve özellikle 9.
yüzyıldan sonra daha ileri pergel-cetvel konstrüksiyon bilgisi gerektiren tasarımlarla karşımıza çıkan geometrik desenleri
İslam Dönemi’nin âdeta bir kimliği hâline getiren özellikler vardır. Bilim ve sanatın kesişim kümesinde olan geometrik
desenler, genellikle yapısındaki geometri göz ardı edilerek sadece tespitler üzerinden bilimsel çalışmalara yansımaktadır.
Pergel-cetvel konstrüksiyonu ile bir desenin inşası kaynağını Öklid (MÖ 3. yüzyıl) geometrisinden almaktadır.
Bu çalışmada, geleneğe ait olan bu inşa metodu kullanılarak Ayasofya Camii’nde yer alan desenlerin analizleri yapılmış ve
İslam Öncesi Dönem uygulamaları ile sonrasında ortaya konulan desenler mukayese edilmiştir. Ayasofya özelinde yapılan
bu mukayese ile birlikte genel bir İslam öncesi ve sonrası sürecine dair değerlendirmede bulunulmuştur. Desenlerin
analizinde ilk kez bu makale ile literatüre kazandırılan “nizamî” kelimesine açıklık getirilerek doğru bir konstrüksiyon
için önemine değinilmiştir. Bunların neticesinde genel olarak geometrik desenleri tanımlarken kullanılan başlıklarda
“İslam” kelimesinin yer almasının sebepleri masaya yatırılmıştır. İlave olarak cami minberinde yer alan desenlerin yapısı
üzerinden Ayasofya Camii minberinin tarihlendirilmesine dair bir öneride bulunulmuştur. Bu çalışma ile birlikte sanat
tarihi bağlamında ele alınan geometrik desenlerin analiz boyutu ile bilim tarihi, hatta kültür tarihi yazımı için de bir
vesika değeri taşıyıp taşımadığı sorgulanmıştır.
2024-01-01T00:00:00Z