Pub Date : 2024-02-06DOI: 10.34248/bsengineering.1413250
Mustafa Ekici
The study employs the potent generalized Kudryashov method to address challenges posed by fractional differential equations in mathematical physics. The primary focus is on deriving new exact solutions for three significant equations: the (3+1)-dimensional time fractional Jimbo-Miwa equation, the (3+1)-dimensional time fractional modified KdV-Zakharov-Kuznetsov equation and the (2+1)-dimensional time fractional Drinfeld-Sokolov-Satsuma-Hirota equation. The versatility and efficacy of the Kudryashov method in addressing complex nonlinear problems establish it as a pivotal component in our research. Specifically, we delineate fractional derivatives within the framework of the conformable fractional derivative, thereby laying a robust foundation for our mathematical inquiries. This paper investigates the efficacy of the generalized Kudryashov method in addressing the intricate challenges posed by fractional differential equations.
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Pub Date : 2024-02-06DOI: 10.34248/bsengineering.1394781
Hasan Bakirci, Ayten Canbal
Turkey has become one of the world's leading countries in the construction sector in the international arena. Today, the use of FIDIC and similar standard contracts is increasing in Turkish contractor companies. In parallel with this situation, it also becomes more common to prefer arbitration in the settlement of disputes in the international construction sector. In the literature, there is no actual publication about the knowledge level of technical staff on arbitration. By taking this deficiency into consideration, the purpose of this study is to measure the awareness of the groups working in the construction sector about the possibility of applying to arbitration as a result of the disputes that they encounter, by measuring the arbitration knowledge level of the technical staff. Accordingly, an empirical field work was conducted with a total of 100 (one hundred) technical staff working in the public and private sector transportation projects in Istanbul. The data collection tool that was used in the research is a questionnaire developed by the researchers and consisting of 25 questions. In the survey analysis, the data were analyzed with the SPSS 28 package program. In the study, a reliability test was conducted for each statement and the Mann-Whitney U test was used. As a result of the analysis, it has been determined that 84.4% of the participants do not follow up the actual developments in the field of arbitration in the world and in Turkey, and do not have sufficient knowledge about arbitration. However, it has been determined that the arbitration knowledge level of the participants, who follow up the actual developments in the world and in Turkey and have sufficient knowledge about arbitration, is high. In addition, it has been determined that 93.8% of the participants would like to participate an information training to be held on arbitration. To increase awareness about arbitration, it is necessary to introduce undergraduate-level arbitration courses for technical personnel in engineering and architecture faculties at universities, and to organize periodic in-service training programs by the arbitration centers in our country.
{"title":"Determination of the Level of Knowledge of the Technical Staff About Arbitration","authors":"Hasan Bakirci, Ayten Canbal","doi":"10.34248/bsengineering.1394781","DOIUrl":"https://doi.org/10.34248/bsengineering.1394781","url":null,"abstract":"Turkey has become one of the world's leading countries in the construction sector in the international arena. Today, the use of FIDIC and similar standard contracts is increasing in Turkish contractor companies. In parallel with this situation, it also becomes more common to prefer arbitration in the settlement of disputes in the international construction sector. In the literature, there is no actual publication about the knowledge level of technical staff on arbitration. By taking this deficiency into consideration, the purpose of this study is to measure the awareness of the groups working in the construction sector about the possibility of applying to arbitration as a result of the disputes that they encounter, by measuring the arbitration knowledge level of the technical staff. Accordingly, an empirical field work was conducted with a total of 100 (one hundred) technical staff working in the public and private sector transportation projects in Istanbul. The data collection tool that was used in the research is a questionnaire developed by the researchers and consisting of 25 questions. In the survey analysis, the data were analyzed with the SPSS 28 package program. In the study, a reliability test was conducted for each statement and the Mann-Whitney U test was used. As a result of the analysis, it has been determined that 84.4% of the participants do not follow up the actual developments in the field of arbitration in the world and in Turkey, and do not have sufficient knowledge about arbitration. However, it has been determined that the arbitration knowledge level of the participants, who follow up the actual developments in the world and in Turkey and have sufficient knowledge about arbitration, is high. In addition, it has been determined that 93.8% of the participants would like to participate an information training to be held on arbitration. To increase awareness about arbitration, it is necessary to introduce undergraduate-level arbitration courses for technical personnel in engineering and architecture faculties at universities, and to organize periodic in-service training programs by the arbitration centers in our country.","PeriodicalId":495872,"journal":{"name":"Black sea journal of engineering and science","volume":"50 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139860594","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 : 2024-02-06DOI: 10.34248/bsengineering.1413250
Mustafa Ekici
The study employs the potent generalized Kudryashov method to address challenges posed by fractional differential equations in mathematical physics. The primary focus is on deriving new exact solutions for three significant equations: the (3+1)-dimensional time fractional Jimbo-Miwa equation, the (3+1)-dimensional time fractional modified KdV-Zakharov-Kuznetsov equation and the (2+1)-dimensional time fractional Drinfeld-Sokolov-Satsuma-Hirota equation. The versatility and efficacy of the Kudryashov method in addressing complex nonlinear problems establish it as a pivotal component in our research. Specifically, we delineate fractional derivatives within the framework of the conformable fractional derivative, thereby laying a robust foundation for our mathematical inquiries. This paper investigates the efficacy of the generalized Kudryashov method in addressing the intricate challenges posed by fractional differential equations.
{"title":"Travelling Wave Solutions for Some Time-Fractional Nonlinear Differential Equations","authors":"Mustafa Ekici","doi":"10.34248/bsengineering.1413250","DOIUrl":"https://doi.org/10.34248/bsengineering.1413250","url":null,"abstract":"The study employs the potent generalized Kudryashov method to address challenges posed by fractional differential equations in mathematical physics. The primary focus is on deriving new exact solutions for three significant equations: the (3+1)-dimensional time fractional Jimbo-Miwa equation, the (3+1)-dimensional time fractional modified KdV-Zakharov-Kuznetsov equation and the (2+1)-dimensional time fractional Drinfeld-Sokolov-Satsuma-Hirota equation. The versatility and efficacy of the Kudryashov method in addressing complex nonlinear problems establish it as a pivotal component in our research. Specifically, we delineate fractional derivatives within the framework of the conformable fractional derivative, thereby laying a robust foundation for our mathematical inquiries. This paper investigates the efficacy of the generalized Kudryashov method in addressing the intricate challenges posed by fractional differential equations.","PeriodicalId":495872,"journal":{"name":"Black sea journal of engineering and science","volume":"18 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139860942","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 : 2024-02-06DOI: 10.34248/bsengineering.1394781
Hasan Bakirci, Ayten Canbal
Turkey has become one of the world's leading countries in the construction sector in the international arena. Today, the use of FIDIC and similar standard contracts is increasing in Turkish contractor companies. In parallel with this situation, it also becomes more common to prefer arbitration in the settlement of disputes in the international construction sector. In the literature, there is no actual publication about the knowledge level of technical staff on arbitration. By taking this deficiency into consideration, the purpose of this study is to measure the awareness of the groups working in the construction sector about the possibility of applying to arbitration as a result of the disputes that they encounter, by measuring the arbitration knowledge level of the technical staff. Accordingly, an empirical field work was conducted with a total of 100 (one hundred) technical staff working in the public and private sector transportation projects in Istanbul. The data collection tool that was used in the research is a questionnaire developed by the researchers and consisting of 25 questions. In the survey analysis, the data were analyzed with the SPSS 28 package program. In the study, a reliability test was conducted for each statement and the Mann-Whitney U test was used. As a result of the analysis, it has been determined that 84.4% of the participants do not follow up the actual developments in the field of arbitration in the world and in Turkey, and do not have sufficient knowledge about arbitration. However, it has been determined that the arbitration knowledge level of the participants, who follow up the actual developments in the world and in Turkey and have sufficient knowledge about arbitration, is high. In addition, it has been determined that 93.8% of the participants would like to participate an information training to be held on arbitration. To increase awareness about arbitration, it is necessary to introduce undergraduate-level arbitration courses for technical personnel in engineering and architecture faculties at universities, and to organize periodic in-service training programs by the arbitration centers in our country.
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Pub Date : 2024-02-02DOI: 10.34248/bsengineering.1398432
Pınar Ozel
The aim of the present study was to investigate brain volumes in pessimist and optimist participants. Therefore, in the present voxel-based morphometry research, it is investigated whether optimism has a corresponding counterpart in the structure of the brain. Thirty-two participants were screened via a publicly available dataset to test for this. The participants are divided into two groups: low optimists and high optimists, each with sixteen people. In comparison, a significant difference (p
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Pub Date : 2024-02-02DOI: 10.34248/bsengineering.1398432
Pınar Ozel
The aim of the present study was to investigate brain volumes in pessimist and optimist participants. Therefore, in the present voxel-based morphometry research, it is investigated whether optimism has a corresponding counterpart in the structure of the brain. Thirty-two participants were screened via a publicly available dataset to test for this. The participants are divided into two groups: low optimists and high optimists, each with sixteen people. In comparison, a significant difference (p
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Pub Date : 2024-01-20DOI: 10.34248/bsengineering.1399640
Eda Bostanci, Önder Kabaş, E. Aksoy
Yer seçim birden çok faktörün ele alındığı kompleks yapısı olan bir işlemdir. Bu çalışmanın amacı, uzaktan algılama (UA), coğrafi bilgi sistemleri (CBS) ve çok kriterli karar (ÇKK) metotu kullanılarak sera için uygun alanların belirlenmesidir. Çalışma alanı Türkiye’nin seracılık faaliyetlerinin yoğun olduğu bölge olması nedeniyle Antalya ili, Aksu ilçesi seçilmiştir. UA ve CBS veri toplama metotları ile on iki mevcut kriter (eğim, bakı, suya, yola ve nüfus yoğunluğuna yakınlık, toprak özellikleri, nem, yağış, sıcaklık, güneşlenme şiddeti, güneşlenme radyasyonu ve rüzgâr şiddeti), sera uygun alan seçimini gerçekleştirmek için kullanılmıştır. Kriterlerin ağırlıkları, analitik hiyerarşi süreci (AHP) matrisi ile elde edilmiştir. Tutarlılık oranı (CR) ve tutarlılık endeksi(CI) sırasıyla 0,067 ve 0,099 olarak elde edilmiştir. Çalışma alanı içinde farklı yasal ve yönetmelikler gereği seçim dışında kalması gereken alanlar çalışma alanından maskeleme metotu ile dışarı çıkarılmıştır. Çalışma alanı uygun olmayan, az uygun, orta uygun, uygun, en uygun şeklinde beş sınıfa ayrılmıştır. Bu alanlar sırasıyla 136,51 ha, 751,61 ha, 155,04 ha, 216,41 ha, 411,71 ha’dir. Sera için En Uygun Alan, çalışma alanin %24,63’ünü kapsamaktadır. Çalışma metotu ile belirlenen sera yer seçimi ile yatırımcının altyapı, enerji ve pazar gibi zorunlu giderlerinin minimum indirilmesi gerçekleştirilebilmektedir. Ayrıca yer belirleme için gerekl olan veriler gelecekte güncellenebilir özelikte olması önerilen modelin gelecekte kullanılabilirliğini ve gelişebilirliğini artırmaktadır.
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Pub Date : 2024-01-15DOI: 10.34248/bsengineering.1337117
Tuba Demir, Bahar Demi̇rel, Melek Öztürk
The aim of this study is to examine the effect of replacing waste aluminum sawdust (AS) with fine aggregate on the strength and durability properties of concrete. For this, concrete mixtures with a cement dosage of 400 kg/m3, water/cement (W/C) ratio of 0.40-0.50-0.60 were prepared. Aluminum sawdust obtained from Elazığ industrial site was added to the concrete mixtures by replacing 0%, 0.5% and 1% fine aggregate by volume. After curing in the curing pool for 28 days, the produced concrete samples were placed in the carbonation tank and exposed to the accelerated carbonation test in three different time periods as the 1st, 3rd and 7th days. Tests of compressive strength, splitting tensile strength, ultrasound transmission velocity, porosity and carbonation depth were performed on concrete samples before and after carbonation. The samples that were exposed to carbonation were compared with the samples that did not undergo carbonation. In addition, the microstructure of AS concrete was investigated using scanning electron microscopic images (SEM). In the microscopic images, larger cracks, openings and interfacial voids were observed in the concrete matrix with the addition of AS. However, due to the formation of ettringite in these gaps and cracks after carbonation, the cavities became smaller. As a result of the experiments, it was observed that the optimum W/C ratio was 40% and the AS amount was 0.5% in the use of AS in concrete. In addition, it was found that the carbonation effect improves the compressive and splitting tensile strength and increases the ultrasound transmission rate. Finally, life cycle assessment (LCA) was conducted to evaluate the environmental impacts of the prepared concrete samples. Considering the large amount of natural aggregate consumption, it is thought that the use of waste materials in concrete will provide environmental and economic benefits.
本研究旨在探讨用细骨料替代废铝锯屑（AS）对混凝土强度和耐久性能的影响。为此，制备了水泥用量为 400 kg/m3、水灰比为 0.40-0.50-0.60 的混凝土混合物。在混凝土混合物中添加了从埃拉泽（Elazığ）工业区获得的铝锯屑，按体积分别取代 0%、0.5% 和 1%的细骨料。在养护池中养护 28 天后，将制作好的混凝土样品放入碳化池中，在第 1 天、第 3 天和第 7 天三个不同时间段内进行加速碳化试验。对碳化前后的混凝土样品进行了抗压强度、劈裂拉伸强度、超声波传输速度、孔隙率和碳化深度测试。经过碳化的样品与未经过碳化的样品进行了比较。此外，还使用扫描电子显微镜图像（SEM）研究了 AS 混凝土的微观结构。在显微图像中，可以观察到添加了 AS 的混凝土基体中出现了较大的裂缝、开口和界面空隙。然而，由于碳化后在这些缝隙和裂缝中形成了乙长石，空洞变小了。实验结果表明，在混凝土中使用 AS 时，最佳 W/C 比为 40%，AS 用量为 0.5%。此外，实验还发现碳化效应提高了抗压强度和劈裂拉伸强度，并增加了超声波传输速率。最后，进行了生命周期评估（LCA），以评价制备的混凝土样品对环境的影响。考虑到天然骨料的大量消耗，人们认为在混凝土中使用废料将带来环境和经济效益。
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Pub Date : 2024-01-08DOI: 10.34248/bsengineering.1387431
Melis Çelik Güney, Tamer Kayaalp
In data mining, in order to calculate descriptive statistics and other statistical model parameters correctly, outliers should be identified and excluded from the data set before starting data analysis. This paper studied and compared the performance of model-based, density-based, clustering-based, angle-based, and isolation-based outlier detection methods used in data mining. ROC and AUC curves were used to compare the performances of outlier detection methods. A data set with a standard normal distribution and fit a logistic regression was simulated. To compare the methods, the data was modified by adding 30 outliers to the data set. The iForest algorithm was found to have higher prediction power than others. In addition, outliers were found in a real data set with the iForest algorithm, and the data set with outliers and without outliers were compared.
{"title":"A Comparative Evaluation of the Outlier Detection Methods","authors":"Melis Çelik Güney, Tamer Kayaalp","doi":"10.34248/bsengineering.1387431","DOIUrl":"https://doi.org/10.34248/bsengineering.1387431","url":null,"abstract":"In data mining, in order to calculate descriptive statistics and other statistical model parameters correctly, outliers should be identified and excluded from the data set before starting data analysis. This paper studied and compared the performance of model-based, density-based, clustering-based, angle-based, and isolation-based outlier detection methods used in data mining. ROC and AUC curves were used to compare the performances of outlier detection methods. A data set with a standard normal distribution and fit a logistic regression was simulated. To compare the methods, the data was modified by adding 30 outliers to the data set. The iForest algorithm was found to have higher prediction power than others. In addition, outliers were found in a real data set with the iForest algorithm, and the data set with outliers and without outliers were compared.","PeriodicalId":495872,"journal":{"name":"Black sea journal of engineering and science","volume":"1 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139446623","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 : 2023-11-09DOI: 10.34248/bsengineering.1365965
Murat Yavuz SOLMAZ, Cenk YANEN, Celal KISTAK, Ercan AYDOĞMUŞ
In this study, the rheological properties of shear thickening fluid, which are generally used as single solid phase in the literature, were investigated by chemical material reinforcement. Considering that the unique shear thickening effect of STF is used in many areas such as increasing the impact resistance of fabrics and energy dissipation, this study aims to provide guidance for investigating what STFs can do with chemical bonds as well as physical bonding.Methylene diphenyl diisocyanate (MDI) was used in varying proportions for chemical reinforcement. When the rheological properties of the suspensions reinforced with MDI as a chemical additive were evaluated, the initial viscosity values increased as the MDI ratio increased, while the solidification behavior under shear was observed significantly in the sample with 2.5% MDI ratio with increasing shear ratio.
{"title":"Production of Chemically Modified Shear Thickening Fluids and Investigation of Their Rheological Properties","authors":"Murat Yavuz SOLMAZ, Cenk YANEN, Celal KISTAK, Ercan AYDOĞMUŞ","doi":"10.34248/bsengineering.1365965","DOIUrl":"https://doi.org/10.34248/bsengineering.1365965","url":null,"abstract":"In this study, the rheological properties of shear thickening fluid, which are generally used as single solid phase in the literature, were investigated by chemical material reinforcement. Considering that the unique shear thickening effect of STF is used in many areas such as increasing the impact resistance of fabrics and energy dissipation, this study aims to provide guidance for investigating what STFs can do with chemical bonds as well as physical bonding.Methylene diphenyl diisocyanate (MDI) was used in varying proportions for chemical reinforcement. When the rheological properties of the suspensions reinforced with MDI as a chemical additive were evaluated, the initial viscosity values increased as the MDI ratio increased, while the solidification behavior under shear was observed significantly in the sample with 2.5% MDI ratio with increasing shear ratio.","PeriodicalId":495872,"journal":{"name":"Black sea journal of engineering and science","volume":" 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135242478","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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