{"title":"A REVIEW OF PV COOLING AND THERMAL ENERGY STORAGE IN PV/T SYSTEMS BASED PHASE CHANGE MATERIALS","authors":"Ecem Şen, Melih Soner Çeliktaş","doi":"10.20854/bujse.1071145","DOIUrl":"https://doi.org/10.20854/bujse.1071145","url":null,"abstract":"","PeriodicalId":302972,"journal":{"name":"Beykent Üniversitesi Fen ve Mühendislik Bilimleri Dergisi","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130601241","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}
Busra Özdenizci Köse, Aybüke Çakici, V. Coskun, Tolunay Kaymakçi, İlayda İşlek, Mohammed Alsadi
{"title":"A Scheduling System for Enhancing and Monitoring Work Performance of Field Employees","authors":"Busra Özdenizci Köse, Aybüke Çakici, V. Coskun, Tolunay Kaymakçi, İlayda İşlek, Mohammed Alsadi","doi":"10.20854/bujse.985510","DOIUrl":"https://doi.org/10.20854/bujse.985510","url":null,"abstract":"","PeriodicalId":302972,"journal":{"name":"Beykent Üniversitesi Fen ve Mühendislik Bilimleri Dergisi","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122921652","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}
{"title":"Görüntü Tabanlı Osmanlı Eserlerini Sorgulamak için REST Destekli Erişim Sistemi","authors":"Ediz Şaykol","doi":"10.20854/bujse.984198","DOIUrl":"https://doi.org/10.20854/bujse.984198","url":null,"abstract":"","PeriodicalId":302972,"journal":{"name":"Beykent Üniversitesi Fen ve Mühendislik Bilimleri Dergisi","volume":"9 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122800882","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}
{"title":"EKSOZOM TANI VE TEDAVİSİ","authors":"Burak Aygan, Mustafa Kaya, İsrafil Küçük","doi":"10.20854/bujse.874609","DOIUrl":"https://doi.org/10.20854/bujse.874609","url":null,"abstract":"","PeriodicalId":302972,"journal":{"name":"Beykent Üniversitesi Fen ve Mühendislik Bilimleri Dergisi","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114308218","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}
{"title":"Anlık Güç Şiddet Ölçüsünün Yakın Saha Yer Hareketine Maruz Kalan Yapıların Maksimum ve Kümülatif Tepkilerini Tahmin Etmedeki Etkinliği","authors":"E. Zengin","doi":"10.20854/bujse.924341","DOIUrl":"https://doi.org/10.20854/bujse.924341","url":null,"abstract":"","PeriodicalId":302972,"journal":{"name":"Beykent Üniversitesi Fen ve Mühendislik Bilimleri Dergisi","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129339207","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}
ifade etmektedir. elemanlar yönteminde sayısal model yaklaşımları kullanılarak çok karmaşık fiziksel denklemler basit olarak edilebilmektedir. Kozlu İlçesinde heyelan potansiyeli oluşturabilecek mevcut yapılar sonlu elemanlar modellenerek statik dinamik incelenmiştir. Analizlerde, verileri modelde olarak kullanılırken, bölgede yer alan mevcut yapılar temelde taban gerilmesi kPa 100 kPa değişen yükler temsil edilmiştir. şevin durumunda, model analizde heyelanın maksimum 28.45 cm olarak elde edilmiştir. Ayrıca, bölgenin uygun olarak seçilen M w 7.2 Düzce depremi ivme kaydı sayısal modelde kullanılarak, potansiyel heyelan bölgesinin dinamik davranışı incelenmiştir. ABSTRACT Landslides are very complex geomorphological events caused by the movement of soil, rocks and organic materials in the direction of gravity. Numerical models refer to mathematical definitions for predicting these geomorphological behaviours and their interactions with the environment. In finite element method, very complex physical equations can be simulated simply by using numerical model approaches. In this study, the static and dynamic behaviours of the existing structures in an area that could create a landslide potential in Zonguldak province, Kozlu district were examined by finite elements method. In the analyses, the drilling data obtained from the study area were implemented in the model, while the existing buildings in the area were represented with loads varying between 50 kPa and 100 kPa in the basement. Accordingly, in the stability of slope, the maximum displacements in the creep zone of the landslide were obtained as 28.45 cm in the model analysis. In addition, the dynamic behaviour of the potential landslide region was investigated by using the acceleration record of Mw 7.2 Düzce earthquake, selected in accordance with the seismicity of the region in numerical model. During dynamic phase, the steady state has changed, and the earthquake-related collapse and displacement movements were obtained in the study area. Accordingly, the maximum vertical and horizontal displacements were obtained in the toe of the landslide around 40-50 cm. During the earthquake, it was observed that geomorphological deformations occurred in the ground due to the effect of the soft soil and average slope of 20°. In conclusion, it has been determined that disaster hazard reduction methods should be applied in the region in order to prevent loss of life and property in the settlement area in case of a possible earthquake.
{"title":"Sonlu Elemanlar Yöntemi ile Depreme Bağlı Heyelan Tehlike Modelleme","authors":"Fatih Sunbul, Ayse Bengu Sunbul","doi":"10.20854/BUJSE.829417","DOIUrl":"https://doi.org/10.20854/BUJSE.829417","url":null,"abstract":"ifade etmektedir. elemanlar yönteminde sayısal model yaklaşımları kullanılarak çok karmaşık fiziksel denklemler basit olarak edilebilmektedir. Kozlu İlçesinde heyelan potansiyeli oluşturabilecek mevcut yapılar sonlu elemanlar modellenerek statik dinamik incelenmiştir. Analizlerde, verileri modelde olarak kullanılırken, bölgede yer alan mevcut yapılar temelde taban gerilmesi kPa 100 kPa değişen yükler temsil edilmiştir. şevin durumunda, model analizde heyelanın maksimum 28.45 cm olarak elde edilmiştir. Ayrıca, bölgenin uygun olarak seçilen M w 7.2 Düzce depremi ivme kaydı sayısal modelde kullanılarak, potansiyel heyelan bölgesinin dinamik davranışı incelenmiştir. ABSTRACT Landslides are very complex geomorphological events caused by the movement of soil, rocks and organic materials in the direction of gravity. Numerical models refer to mathematical definitions for predicting these geomorphological behaviours and their interactions with the environment. In finite element method, very complex physical equations can be simulated simply by using numerical model approaches. In this study, the static and dynamic behaviours of the existing structures in an area that could create a landslide potential in Zonguldak province, Kozlu district were examined by finite elements method. In the analyses, the drilling data obtained from the study area were implemented in the model, while the existing buildings in the area were represented with loads varying between 50 kPa and 100 kPa in the basement. Accordingly, in the stability of slope, the maximum displacements in the creep zone of the landslide were obtained as 28.45 cm in the model analysis. In addition, the dynamic behaviour of the potential landslide region was investigated by using the acceleration record of Mw 7.2 Düzce earthquake, selected in accordance with the seismicity of the region in numerical model. During dynamic phase, the steady state has changed, and the earthquake-related collapse and displacement movements were obtained in the study area. Accordingly, the maximum vertical and horizontal displacements were obtained in the toe of the landslide around 40-50 cm. During the earthquake, it was observed that geomorphological deformations occurred in the ground due to the effect of the soft soil and average slope of 20°. In conclusion, it has been determined that disaster hazard reduction methods should be applied in the region in order to prevent loss of life and property in the settlement area in case of a possible earthquake.","PeriodicalId":302972,"journal":{"name":"Beykent Üniversitesi Fen ve Mühendislik Bilimleri Dergisi","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133554725","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}
In this study, colemanite-SiO2 were produced by using mixed oxide technique. The composition was formed with various proportions for the structural analysis. The results of the structural analysis indicated that second phase did not form in colemanite and SiO2. Addionality, the colemanite/polyaniline/SiO2 composites were produced by hot pressing using the compositions of colemanite-SiO2 in different proportions and aniline. The weight ratios of colemanite-SiO2 and aniline were 1:1 respectively and epoxy resin was used to produce microwave shielding composites. The microwave shielding performances of colemanite/polyaniline/SiO2 composites were investigated by shielding effectiveness in 8 –18 GHz using two–port vector network analyzer. A minimum of – 41.1 dB shielding effectiveness performance was obtained in 16.09 GHz at the thickness of 1.5 mm. This shielding performance can be modulated simply by controlling the content of polyaniline and content of colemanite-SiO2 in the samples for the required frequency bands.
{"title":"RADAR VE DAHA GENİŞ FREKANS ARALIĞINDA KOLEMANİT/PANI/SiO2 KOMPOZİTLERİN ELEKTROMANYETİK KALKANLAMA PERFORMANSLARI","authors":"E. Şahi̇n, Mehriban Emek, B. Ertuğ, M. Kartal","doi":"10.20854/bujse.742821","DOIUrl":"https://doi.org/10.20854/bujse.742821","url":null,"abstract":"In this study, colemanite-SiO2 were produced by using mixed oxide technique. The composition was formed with various proportions for the structural analysis. The results of the structural analysis indicated that second phase did not form in colemanite and SiO2. Addionality, the colemanite/polyaniline/SiO2 composites were produced by hot pressing using the compositions of colemanite-SiO2 in different proportions and aniline. The weight ratios of colemanite-SiO2 and aniline were 1:1 respectively and epoxy resin was used to produce microwave shielding composites. The microwave shielding performances of colemanite/polyaniline/SiO2 composites were investigated by shielding effectiveness in 8 –18 GHz using two–port vector network analyzer. A minimum of – 41.1 dB shielding effectiveness performance was obtained in 16.09 GHz at the thickness of 1.5 mm. This shielding performance can be modulated simply by controlling the content of polyaniline and content of colemanite-SiO2 in the samples for the required frequency bands.","PeriodicalId":302972,"journal":{"name":"Beykent Üniversitesi Fen ve Mühendislik Bilimleri Dergisi","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129288304","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}
In this paper the well-known properties of helices in Euclidian 3-space are extended to n-dimensional Riemann-Otsuki space. We define the infinitesimal deformations of curves in Riemann-Otsuki space and obtain the condition such that the given deformation of a curve defines a generalized Helix in this space.
{"title":"GENERELIZED HELICES ON N-DIMENSIONAL RIEMANN-OTSUKI SPACES","authors":"Jeta Alo","doi":"10.20854/BUJSE.561471","DOIUrl":"https://doi.org/10.20854/BUJSE.561471","url":null,"abstract":"In this paper the well-known properties of helices in Euclidian 3-space are extended to n-dimensional Riemann-Otsuki space. We define the infinitesimal deformations of curves in Riemann-Otsuki space and obtain the condition such that the given deformation of a curve defines a generalized Helix in this space.","PeriodicalId":302972,"journal":{"name":"Beykent Üniversitesi Fen ve Mühendislik Bilimleri Dergisi","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132933945","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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