Kalsiyum ve Magnezyum elementlerinin (+2) degerlikli iyon halleri sularda sertlik olusturmaktadir. Insan sagligi acisindan ciddi riskler olusturmasa da sert sular sanayide uretim kalitesinin dusmesi, borularin omrunun azalmasi, sicak su ureten ya da tuketen cihazlarin omrunun azalmasi gibi olumsuzluklara sebep olur. Sular CaCO 3 esdegeri olarak (0 – 75 mg/L) yumusak, (75 – 150 mg/L) orta sert, (150 – 300 mg/L) sert, ( >300 mg/L) cok sert su seklinde siniflandirilmaktadir. Membran Kapasitif deiyonizasyon (MCDI), sertlik turlerinin giderilmesinde etkili bir prosestir. Bu calismada sertlik gideriminde aritilmis suyun kullanim alani da goz onunde bulundurularak cok sert su sinifina giren farkli oranlarda Ca 2+ ve Mg 2+ iceren sular MCDI ile aritilarak proses suyu ve icme suyu elde edilmeye calisilmistir. Calismalar neticesinde 300 mg CaCO3/L sertlik iceren sular proses suyu uretiminde %90 - %97 araliginda; icme suyu eldesinde ise %71 - %82 oranlarinda aritilmistir. Enerji icin Maliyet analizi yapildiginda proses suyu icin maliyetler 0,01 – 0,02 $/m 3 araliginda degisirken icme suyu eldesi icin bu maliyet 0,009 – 0,016 $/m 3 araliginda degismektedir.
{"title":"Membran Kapasitif Deiyonizasyon Prosesi ile Sertlik Giderimi","authors":"H. Uzun, Eyüp Debik","doi":"10.21541/APJES.491791","DOIUrl":"https://doi.org/10.21541/APJES.491791","url":null,"abstract":"Kalsiyum ve Magnezyum elementlerinin (+2) degerlikli iyon halleri sularda sertlik olusturmaktadir. Insan sagligi acisindan ciddi riskler olusturmasa da sert sular sanayide uretim kalitesinin dusmesi, borularin omrunun azalmasi, sicak su ureten ya da tuketen cihazlarin omrunun azalmasi gibi olumsuzluklara sebep olur. Sular CaCO 3 esdegeri olarak (0 – 75 mg/L) yumusak, (75 – 150 mg/L) orta sert, (150 – 300 mg/L) sert, ( >300 mg/L) cok sert su seklinde siniflandirilmaktadir. Membran Kapasitif deiyonizasyon (MCDI), sertlik turlerinin giderilmesinde etkili bir prosestir. Bu calismada sertlik gideriminde aritilmis suyun kullanim alani da goz onunde bulundurularak cok sert su sinifina giren farkli oranlarda Ca 2+ ve Mg 2+ iceren sular MCDI ile aritilarak proses suyu ve icme suyu elde edilmeye calisilmistir. Calismalar neticesinde 300 mg CaCO3/L sertlik iceren sular proses suyu uretiminde %90 - %97 araliginda; icme suyu eldesinde ise %71 - %82 oranlarinda aritilmistir. Enerji icin Maliyet analizi yapildiginda proses suyu icin maliyetler 0,01 – 0,02 $/m 3 araliginda degisirken icme suyu eldesi icin bu maliyet 0,009 – 0,016 $/m 3 araliginda degismektedir.","PeriodicalId":294830,"journal":{"name":"Academic Platform Journal of Engineering and Science","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130927046","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}
Measuring the air quality level in the city at regular intervals and taking the necessary measures by examining the results of the measurement is very important for the health of the people and other living things in these cities. For this purpose, air quality measurement stations have been established in many cities by the relevant ministry. In this study, one of these stations, Adana province provincial station measurement data was used. The data used are the measured values of air pollutant gases such as sulfur dioxide (SO2), nitrogen dioxide (NO2), ozone (O3), carbon monoxide (CO) and dust particles (PM10). The air quality index was determined by applying different machine learning algorithms to these data. Machine learning regression algorithms used; random forest, decision tree, support vector, k-nearest neighbor, linear, artificial neural network, stacking, adaboost, gradient boosting and bagging regression. The results obtained by comparing the success rates of these algorithms in terms of error rates and run times were evaluated.
{"title":"Hava Kalite İndeksinin Tahmin Başarısının Artırılması için Topluluk Regresyon Algoritmalarının Kullanılması","authors":"Muhammet Emre Irmak, Ibrahim Berkan Aydilek","doi":"10.21541/apjes.478038","DOIUrl":"https://doi.org/10.21541/apjes.478038","url":null,"abstract":"Measuring the air quality level in the city at regular intervals and taking the necessary measures by examining the results of the measurement is very important for the health of the people and other living things in these cities. For this purpose, air quality measurement stations have been established in many cities by the relevant ministry. In this study, one of these stations, Adana province provincial station measurement data was used. The data used are the measured values of air pollutant gases such as sulfur dioxide (SO2), nitrogen dioxide (NO2), ozone (O3), carbon monoxide (CO) and dust particles (PM10). The air quality index was determined by applying different machine learning algorithms to these data. Machine learning regression algorithms used; random forest, decision tree, support vector, k-nearest neighbor, linear, artificial neural network, stacking, adaboost, gradient boosting and bagging regression. The results obtained by comparing the success rates of these algorithms in terms of error rates and run times were evaluated.","PeriodicalId":294830,"journal":{"name":"Academic Platform Journal of Engineering and Science","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116986879","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}
Depo yonetiminin etkinligini belirleyen en onemli unsurlardan biri deponun tasarimi ve dogru adresleme/yerlestirme yapilabilmesidir. Kurulan depo sahasinin, isletmenin gereksinimlerine gore tasarlanmadigi durumlarda, depo sahasi-operasyon uyumsuzlugu dogmakta, soz konusu durum yuksek stok maliyeti, dusuk verimlilik ve dusuk uretim performansi ve islerin aksamasi ile de sonuclanabilmektedir. Bu sebeple depo tasariminda, depo sahasinin mimari yapisi, depo sahasindaki yerlesim, yukleme, bosaltma ve istifleme sahalarinin yerlesimi gibi faktorler dogrudan etkili olmaktadir. Yapilan bu calismada bir lastik ureticisindeki uretim ortami incelenmistir. Mikser sahasindaki peronlara malzemelerin dogru yerlestirilememesi, depo alani kullaniminda verimsizlige ve yetersizlige sebep olmaktadir. Bu sebeple depodaki stok kapasitesi ve kapasite kullanimindaki verimlilik artirilmaya calisilmistir. Yapilan analizler sonucunda bu probleme en uygun cozum olarak statik adreslemeden dinamik adreslemeye gecis oldugu onerilmistir. Dinamik adresleme icin bir algoritma gelistirilmistir. Algoritma Visual Basic dilinde dinamik programlama yontemi kullanilarak kodlanmistir. Hem mevcut durum olan statik adresleme hem de onerilen durum olan dinamik adresleme icin yazilan program ciktilari karsilastirildiginda; isletmeye yari dolu peron sayisinin azaltilmasi yonunden statik adreslemede %88 olan oranin dinamik adresleme ile %53’e kadar iyilestirme olanagi sunabildigi gorulmustur. Ayrica statik adreslemede kullanilabilir peron sayisi 213 iken dinamik adresleme sayesinde bu sayi 269 olup, isletmeye yeni karisim kodlarinin depolanmasi icin firsat sunulmustur. Son olarak ise Mikser’den cikan paletlere peron ararken dinamik adreslemede goz onunde bulundurulan “Miksere en yakin perona ata” stratejisi ile forkliftci is yuku azaltilmistir.
{"title":"Bir Lastik Fabrikasında Dinamik Adresleme Yaklaşımı İle Depoya Yerleştirme","authors":"Berrin Deni̇zhan, Şeyma Menşur","doi":"10.21541/apjes.517781","DOIUrl":"https://doi.org/10.21541/apjes.517781","url":null,"abstract":"Depo yonetiminin etkinligini belirleyen en onemli unsurlardan biri deponun tasarimi ve dogru adresleme/yerlestirme yapilabilmesidir. Kurulan depo sahasinin, isletmenin gereksinimlerine gore tasarlanmadigi durumlarda, depo sahasi-operasyon uyumsuzlugu dogmakta, soz konusu durum yuksek stok maliyeti, dusuk verimlilik ve dusuk uretim performansi ve islerin aksamasi ile de sonuclanabilmektedir. Bu sebeple depo tasariminda, depo sahasinin mimari yapisi, depo sahasindaki yerlesim, yukleme, bosaltma ve istifleme sahalarinin yerlesimi gibi faktorler dogrudan etkili olmaktadir. Yapilan bu calismada bir lastik ureticisindeki uretim ortami incelenmistir. Mikser sahasindaki peronlara malzemelerin dogru yerlestirilememesi, depo alani kullaniminda verimsizlige ve yetersizlige sebep olmaktadir. Bu sebeple depodaki stok kapasitesi ve kapasite kullanimindaki verimlilik artirilmaya calisilmistir. Yapilan analizler sonucunda bu probleme en uygun cozum olarak statik adreslemeden dinamik adreslemeye gecis oldugu onerilmistir. Dinamik adresleme icin bir algoritma gelistirilmistir. Algoritma Visual Basic dilinde dinamik programlama yontemi kullanilarak kodlanmistir. Hem mevcut durum olan statik adresleme hem de onerilen durum olan dinamik adresleme icin yazilan program ciktilari karsilastirildiginda; isletmeye yari dolu peron sayisinin azaltilmasi yonunden statik adreslemede %88 olan oranin dinamik adresleme ile %53’e kadar iyilestirme olanagi sunabildigi gorulmustur. Ayrica statik adreslemede kullanilabilir peron sayisi 213 iken dinamik adresleme sayesinde bu sayi 269 olup, isletmeye yeni karisim kodlarinin depolanmasi icin firsat sunulmustur. Son olarak ise Mikser’den cikan paletlere peron ararken dinamik adreslemede goz onunde bulundurulan “Miksere en yakin perona ata” stratejisi ile forkliftci is yuku azaltilmistir.","PeriodicalId":294830,"journal":{"name":"Academic Platform Journal of Engineering and Science","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115676800","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}
Understanding the reason behind the emotions placed in the social media plays a key role to learn mood characterization of any written texts that are not seen before. Knowing how to classify the mood characterization leads this technology to be useful in a variety of fields. The Latent Dirichlet Allocation (LDA), a topic modeling algorithm, was used to determine which emotions the tweets on Twitter had in the study. The dataset consists of 4000 tweets that are categorized into 5 different emotions that are anger, fear, happiness, sadness, and surprise. Zemberek, Snowball, and first 5 letters root extraction methods are used to create models. The generated models were tested by using the proposed n-stage LDA method. With the proposed method, we aimed to increase model’s success rate by decreasing the number of words in the dictionary. By using the multi-stages LDA, we were able to perform better (2-stages:70.5%, 3-stages:76.4%) than the state of the art result (60.4%) which was achieved using the plain LDA for 5 classes.
{"title":"Emotion Detection with n-stage Latent Dirichlet Allocation for Turkish Tweets","authors":"Zekeriya Anil Guven, B. Diri, Tolgahan Cakaloglu","doi":"10.21541/apjes.459447","DOIUrl":"https://doi.org/10.21541/apjes.459447","url":null,"abstract":"Understanding the reason behind the emotions placed in the social media plays a key role to learn mood characterization of any written texts that are not seen before. Knowing how to classify the mood characterization leads this technology to be useful in a variety of fields. The Latent Dirichlet Allocation (LDA), a topic modeling algorithm, was used to determine which emotions the tweets on Twitter had in the study. The dataset consists of 4000 tweets that are categorized into 5 different emotions that are anger, fear, happiness, sadness, and surprise. Zemberek, Snowball, and first 5 letters root extraction methods are used to create models. The generated models were tested by using the proposed n-stage LDA method. With the proposed method, we aimed to increase model’s success rate by decreasing the number of words in the dictionary. By using the multi-stages LDA, we were able to perform better (2-stages:70.5%, 3-stages:76.4%) than the state of the art result (60.4%) which was achieved using the plain LDA for 5 classes.","PeriodicalId":294830,"journal":{"name":"Academic Platform Journal of Engineering and Science","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126748648","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}
Son yillarda yazilim, donanim ve algoritma konularinda buyuk gelismeler meydana gelmistir. Teknolojide yasanan bu gelismeler sensor teknolojilerini de etkilemistir. Baslangicta bir oyun cihazi olarak piyasaya surulen Kinect sensor gerek arastirmacilar gerek gelistiriciler tarafindan buyuk ilgiyle karsilanmistir. Kinect sensor literaturde farkli alanlarda farkli amaclar icin kullanilmistir. Kinect sensorden alinan tum veriler Microsoft tarafindan gelistirilen Yazilim Gelistirme Kiti (YGK) ile gelistiricilere iletilmektedir. Kinect sensoru sahne karmasikligina gore degismek uzere normal durumlarda her saniyede 240 bin ile 270 bin nokta verisi uretmektedir. Bu calismanin amaci Kinect uygulamalari icin veri transfer platformu tasarlanmasidir. Gelistirilen platform istemci sunucu mimarisi uzerinde calismaktadir. Cevrimici ve cevrimdisi haberlesme durumlara uygun farkli senaryolar barindiran platform, ayni zamanda bir dizi filtreleme ve sifreleme algoritmalarini da sunmaktadir. Platformda 2D/3D goruntu ve nokta bulutu isleme icin buyuk olcekli, acik kaynakli bir proje olan Nokta Bulut Kutuphanesi ni (NBK) kullanilmistir. Istege bagli olarak VoxelGrid (VG) Filtre, Outlier Filtre, Histogram Tabanli Kosullu Filtre, Octree-tabanli Sikistirma ve PGP Şifreleme yontemlerini de barindirmaktadir. Ayrica Kinect uygulamalarina ozel bir veri yapisi da gelistirilmistir. Cevrimici haberlesme icin WebRTC ara katman yazilimi kullanilmistir. Tum bu asamalar sonucunda gereksiz veri noktalari temizlenmis, sikistirilmis, guvenli hale getirilmis ve gelistirilen veri yapisina uygun veri paketleri elde edilmistir. Filtrelemeler sonucunda % 19.96 sikistirma orani elde edilmistir. Istege bagli tasarim sayesinde uygulama veya istemci bazli filtreleme saglanmistir. Filtrelemeler sonrasinda uygulanan dosya sikistirma yaklasimi ile % 10.38 oraninda dosya sikistirma sonucu da elde edilmistir. Sunulan platform arastirmacilar ve gelistiriciler tarafindan kullanilan Kinect uygulamalarinda performans saglayacaktir.
{"title":"Kinect Uygulamaları için Veri Transfer Platformu Tasarımı","authors":"Erdal Erdal, Atilla Ergüzen","doi":"10.21541/apjes.451125","DOIUrl":"https://doi.org/10.21541/apjes.451125","url":null,"abstract":"Son yillarda yazilim, donanim ve algoritma konularinda buyuk gelismeler meydana gelmistir. Teknolojide yasanan bu gelismeler sensor teknolojilerini de etkilemistir. Baslangicta bir oyun cihazi olarak piyasaya surulen Kinect sensor gerek arastirmacilar gerek gelistiriciler tarafindan buyuk ilgiyle karsilanmistir. Kinect sensor literaturde farkli alanlarda farkli amaclar icin kullanilmistir. Kinect sensorden alinan tum veriler Microsoft tarafindan gelistirilen Yazilim Gelistirme Kiti (YGK) ile gelistiricilere iletilmektedir. Kinect sensoru sahne karmasikligina gore degismek uzere normal durumlarda her saniyede 240 bin ile 270 bin nokta verisi uretmektedir. Bu calismanin amaci Kinect uygulamalari icin veri transfer platformu tasarlanmasidir. Gelistirilen platform istemci sunucu mimarisi uzerinde calismaktadir. Cevrimici ve cevrimdisi haberlesme durumlara uygun farkli senaryolar barindiran platform, ayni zamanda bir dizi filtreleme ve sifreleme algoritmalarini da sunmaktadir. Platformda 2D/3D goruntu ve nokta bulutu isleme icin buyuk olcekli, acik kaynakli bir proje olan Nokta Bulut Kutuphanesi ni (NBK) kullanilmistir. Istege bagli olarak VoxelGrid (VG) Filtre, Outlier Filtre, Histogram Tabanli Kosullu Filtre, Octree-tabanli Sikistirma ve PGP Şifreleme yontemlerini de barindirmaktadir. Ayrica Kinect uygulamalarina ozel bir veri yapisi da gelistirilmistir. Cevrimici haberlesme icin WebRTC ara katman yazilimi kullanilmistir. Tum bu asamalar sonucunda gereksiz veri noktalari temizlenmis, sikistirilmis, guvenli hale getirilmis ve gelistirilen veri yapisina uygun veri paketleri elde edilmistir. Filtrelemeler sonucunda % 19.96 sikistirma orani elde edilmistir. Istege bagli tasarim sayesinde uygulama veya istemci bazli filtreleme saglanmistir. Filtrelemeler sonrasinda uygulanan dosya sikistirma yaklasimi ile % 10.38 oraninda dosya sikistirma sonucu da elde edilmistir. Sunulan platform arastirmacilar ve gelistiriciler tarafindan kullanilan Kinect uygulamalarinda performans saglayacaktir.","PeriodicalId":294830,"journal":{"name":"Academic Platform Journal of Engineering and Science","volume":"629 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123275703","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}
Demiryolu tasimaciliginin guvenlik felsefesi acisindan, dinamik yuk altinda calisan akslarin duzenli muayenesinde hasara yol acacak korozyon cukurlari ve yorulma catlaklarinin tespiti cok onemlidir. Alinmasi gereken kalite kontrol onlemleri, duzenli tahribatsiz test kontrol yontemleri ile guvenlik seviyesi gelistirilmeye calisilmaktadir. Bu calismada demiryolu akslarinin ultrasonik testi icin gelismis ultrasonik muayene yontemi olan Phased array yonteminin konvensiyonel ultrasonik muayene yontemine karsi avantajlari nicel olarak incelenmistir.
{"title":"Demiryolu Akslarının Ultrasonik Muayene Yöntemi Ve Phased Array Yöntemi İle Tahribatsız Muayenesi","authors":"Yıldız Yaralı Özbek, Serhan Emre","doi":"10.21541/apjes.431441","DOIUrl":"https://doi.org/10.21541/apjes.431441","url":null,"abstract":"Demiryolu tasimaciliginin guvenlik felsefesi acisindan, dinamik yuk altinda calisan akslarin duzenli muayenesinde hasara yol acacak korozyon cukurlari ve yorulma catlaklarinin tespiti cok onemlidir. Alinmasi gereken kalite kontrol onlemleri, duzenli tahribatsiz test kontrol yontemleri ile guvenlik seviyesi gelistirilmeye calisilmaktadir. Bu calismada demiryolu akslarinin ultrasonik testi icin gelismis ultrasonik muayene yontemi olan Phased array yonteminin konvensiyonel ultrasonik muayene yontemine karsi avantajlari nicel olarak incelenmistir.","PeriodicalId":294830,"journal":{"name":"Academic Platform Journal of Engineering and Science","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126074685","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}
Abdülkadir Akyol, Hasan Algül, Oğuzhan Bilaç, Seda Ulu, Harun Gul, M. Uysal, Yusuf Çay, A. Alp
Elektrolitik kaplamalara alternatif olusturan ve disaridan herhangi bir elektrik ihtiyacina gerek duymadan gerceklesen otokatalitik akimsiz kaplamalar bircok endustriyel alanda kullanilmaktadir. Homojen bir kaplama kalinligi elde edilmesi, yuksek sertlik, iyi korozyon ve asinma direncine sahip olmasi, akimsiz kaplamalari oldukca yaygin hale getirmektedir. Ayrica karmasik sekilli parcalara da uygulanabilmesi avantajlari arasinda yer almaktadir. Bu calismada akimsiz Ni-P kaplamalarin sertlik, metalik nikel ve fosfor icerikleri, isil islem sonrasi olusan bilesik turleri ve mikroyapisal ozellikleri incelenerek sodyum hipofosfit, sicaklik ve zaman parametrelerinin etkileri ortaya konmustur.
{"title":"Elektrolitik Sert Metal Kaplamaya Alternatif Çevreye Duyarlı Ni-P Kaplamaların 6061 Serisi Alüminyum Altlık Üzerine Akımsız Yöntemle Biriktirilmesinde Sodyum hipofosfit, Sıcaklık ve Zamanın Etkisi","authors":"Abdülkadir Akyol, Hasan Algül, Oğuzhan Bilaç, Seda Ulu, Harun Gul, M. Uysal, Yusuf Çay, A. Alp","doi":"10.21541/APJES.478232","DOIUrl":"https://doi.org/10.21541/APJES.478232","url":null,"abstract":"Elektrolitik kaplamalara alternatif olusturan ve disaridan herhangi bir elektrik ihtiyacina gerek duymadan gerceklesen otokatalitik akimsiz kaplamalar bircok endustriyel alanda kullanilmaktadir. Homojen bir kaplama kalinligi elde edilmesi, yuksek sertlik, iyi korozyon ve asinma direncine sahip olmasi, akimsiz kaplamalari oldukca yaygin hale getirmektedir. Ayrica karmasik sekilli parcalara da uygulanabilmesi avantajlari arasinda yer almaktadir. Bu calismada akimsiz Ni-P kaplamalarin sertlik, metalik nikel ve fosfor icerikleri, isil islem sonrasi olusan bilesik turleri ve mikroyapisal ozellikleri incelenerek sodyum hipofosfit, sicaklik ve zaman parametrelerinin etkileri ortaya konmustur.","PeriodicalId":294830,"journal":{"name":"Academic Platform Journal of Engineering and Science","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124325015","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}
Nufusun surekli artmasi ve sanayinin gelismesi, basta su olmak uzere farkli sivilarin depolanma ihtiyaci, sivi depolarinin insa edilmesini gerekli kilmaktadir. Diger taraftan depolarin dinamik davranislarini daha gercekci olarak belirleyebilmek icin calismalar da yapilmaktadir. Bu calismalardan uygun gorulenler yonetmeliklere alinmaktadir. Bu calismanin amaci, sivi depolarinin depreme gore hesabini yapmak durumunda kalan ya da bu konuya ilgi duyan muhendislerin; sivi depolarinin dinamik yukler etkisindeki davranisini anlamalarina yardimci olmak, bunlar icin yonetmeliklerde ongorulen bagintilari karsilastirmali olarak sunmak ve sivi depolarinin hesap ve tasarimini yapabilmelerine katki saglamaktir. Bu amacla calismada, silindirik sivi depolarinin sismik analizi icin ACI 350 ve EUROCODE 8 yonetmeliklerinde ongorulen hesap esaslari ve parametrelerin belirlenmesinde kullanilan bagintilar karsilastirilmali olarak irdelenmektedir.
{"title":"Silindirik Sıvı Depolarının Dinamik Analizinin ACI 350 VE EUROCODE 8’e göre Karşılaştırılmalı olarak İrdelenmesi","authors":"Badradine Ali, Adem Doğangün","doi":"10.21541/apjes.492871","DOIUrl":"https://doi.org/10.21541/apjes.492871","url":null,"abstract":"Nufusun surekli artmasi ve sanayinin gelismesi, basta su olmak uzere farkli sivilarin depolanma ihtiyaci, sivi depolarinin insa edilmesini gerekli kilmaktadir. Diger taraftan depolarin dinamik davranislarini daha gercekci olarak belirleyebilmek icin calismalar da yapilmaktadir. Bu calismalardan uygun gorulenler yonetmeliklere alinmaktadir. Bu calismanin amaci, sivi depolarinin depreme gore hesabini yapmak durumunda kalan ya da bu konuya ilgi duyan muhendislerin; sivi depolarinin dinamik yukler etkisindeki davranisini anlamalarina yardimci olmak, bunlar icin yonetmeliklerde ongorulen bagintilari karsilastirmali olarak sunmak ve sivi depolarinin hesap ve tasarimini yapabilmelerine katki saglamaktir. Bu amacla calismada, silindirik sivi depolarinin sismik analizi icin ACI 350 ve EUROCODE 8 yonetmeliklerinde ongorulen hesap esaslari ve parametrelerin belirlenmesinde kullanilan bagintilar karsilastirilmali olarak irdelenmektedir.","PeriodicalId":294830,"journal":{"name":"Academic Platform Journal of Engineering and Science","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133888703","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}
Being the primarily organic phase of bone, collagen type I is an important contributor to bone’s mechanical resistance to fracture. Gaining mechanistic insight into collagen stabilization mechanism is critical to developing new targets to prevent bone fracture. The role of water and hydroxyproline (Hyp) in collagen stability mechanism is still controversial. The aim of this study was to investigate the influences of Hyp and bound water on the collagen molecular stability. Four collagen like-peptide (CLP) models were compared in terms of conformational energies and hydrogen bonding types. CLP1 model represents regular collagen structure without water molecules while CLP2 model represents collagen structure without water and Hyp residue. CLPW1 and CLPW2 are the models of CLP1 and CLP2 with water molecules around them, respectively. Cumulative interpreting of four CLPs models was shed light on the factors influencing collagen stability in the frame of steric energy. Total steric energy was ordered as: CLP2 > CLP1 > CLPW2 > CLPW1, indicating that CLPW1 was the most stable collagen model. On the other hand, CLP2 was the least stable collagen model based on the steric energy comparison. In addition, the hydrogen bonding observed in the four models reveled that water molecules around the models help in binding collagen triple helix through different water bridges since they contributed extra way for binding of triple chains. Moreover, some of the observed water bridges involved directly the presence of Hyp residue. Cumulative results suggested the important role of bound water molecules and Hyp on collagen molecular stability.
{"title":"Bound Water and Hydroxyproline are the essential contributors to collagen molecular stability: A Computational Analysis","authors":"M. Ünal","doi":"10.21541/apjes.515201","DOIUrl":"https://doi.org/10.21541/apjes.515201","url":null,"abstract":"Being the primarily organic phase of bone, collagen type I is an important contributor to bone’s mechanical resistance to fracture. Gaining mechanistic insight into collagen stabilization mechanism is critical to developing new targets to prevent bone fracture. The role of water and hydroxyproline (Hyp) in collagen stability mechanism is still controversial. The aim of this study was to investigate the influences of Hyp and bound water on the collagen molecular stability. Four collagen like-peptide (CLP) models were compared in terms of conformational energies and hydrogen bonding types. CLP1 model represents regular collagen structure without water molecules while CLP2 model represents collagen structure without water and Hyp residue. CLPW1 and CLPW2 are the models of CLP1 and CLP2 with water molecules around them, respectively. Cumulative interpreting of four CLPs models was shed light on the factors influencing collagen stability in the frame of steric energy. Total steric energy was ordered as: CLP2 > CLP1 > CLPW2 > CLPW1, indicating that CLPW1 was the most stable collagen model. On the other hand, CLP2 was the least stable collagen model based on the steric energy comparison. In addition, the hydrogen bonding observed in the four models reveled that water molecules around the models help in binding collagen triple helix through different water bridges since they contributed extra way for binding of triple chains. Moreover, some of the observed water bridges involved directly the presence of Hyp residue. Cumulative results suggested the important role of bound water molecules and Hyp on collagen molecular stability.","PeriodicalId":294830,"journal":{"name":"Academic Platform Journal of Engineering and Science","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129282461","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}
This manuscript describes how the weight of a simply supported composite plate-strip (containing twin circular inclusions) affects its dynamic behaviors when exposed to bending load as analyzed via the finite element method (FEM). The centers of the twin circular inclusions are on a line parallel to the free surface, and the materials of both inclusions are the same. First, the effects of body forces (the plate-strip’s own weight) and surface forces (pre-stretching load) on the plate-strip (both are considered to be initial stresses) are identified using the classical linear theory of elasticity. Next, the consequences of these stressors (identified in the first step) under additional time harmonic bending load on the forced vibration around the inclusions are determined using the three-dimensional linearized theory of elasticity (TDLTE) under the plane-strain state. The data herein suggest that the plate-strip’s weight can significantly effect dynamic characteristics of the considered plate-strip.
{"title":"The Effect of Own Weight on Dynamic Analysis of a Pre-Stretched Composite Plate-Strip Containing Twin Circular Inclusions Under Bending Using Finite Element Method","authors":"U. Yesil","doi":"10.21541/apjes.488483","DOIUrl":"https://doi.org/10.21541/apjes.488483","url":null,"abstract":"This manuscript describes how the weight of a simply supported composite plate-strip (containing twin circular inclusions) affects its dynamic behaviors when exposed to bending load as analyzed via the finite element method (FEM). The centers of the twin circular inclusions are on a line parallel to the free surface, and the materials of both inclusions are the same. First, the effects of body forces (the plate-strip’s own weight) and surface forces (pre-stretching load) on the plate-strip (both are considered to be initial stresses) are identified using the classical linear theory of elasticity. Next, the consequences of these stressors (identified in the first step) under additional time harmonic bending load on the forced vibration around the inclusions are determined using the three-dimensional linearized theory of elasticity (TDLTE) under the plane-strain state. The data herein suggest that the plate-strip’s weight can significantly effect dynamic characteristics of the considered plate-strip.","PeriodicalId":294830,"journal":{"name":"Academic Platform Journal of Engineering and Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129896511","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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