7th International Students Science Congress Proceedings Book最新文献

{"title":"Engineering Applications of Polynomial Matrix Method: A Review","authors":"M. Çevik, Mehmet Sezer","doi":"10.52460/issc.2023.032","DOIUrl":"https://doi.org/10.52460/issc.2023.032","url":null,"abstract":"The modeling of natural phenomena is based on ordinary and partial differential equations, which appear in all branches of science and engineering. For this reason, applied mathematicians and engineers have tried to develop new methods of solutions to these equations. One of the widely used numerical methods for the solution of ordinary and partial differential, integro-differential, and integral equations is the Polynomial Matrix Method (PMM). In this study, these methods are introduced first and then a brief history of the development of the method is given. Almost 30 polynomials used in this collocation approach are mentioned. Fundamental principle of the PMM is explained. Engineering applications such as in single and multi-degree of freedom systems, mechanical vibrations, heat equations, diffusion equation and others are reviewed.","PeriodicalId":138273,"journal":{"name":"7th International Students Science Congress Proceedings Book","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121338277","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":"Alagöl Gölü Değişiminin Uzaktan Algılama ile Haritalanması","authors":"Altynay Abdrakhmanova","doi":"10.52460/issc.2023.027","DOIUrl":"https://doi.org/10.52460/issc.2023.027","url":null,"abstract":"Bu çalışmanın temel amacı, Alagöl Gölü'nün kıyı şeridinin yıllar içindeki konumsal değişimlerini uzaktan algılama yaklaşımları kullanаrak analiz etmektir. Bu amaç doğrultusunda üç adet Landsat 5 ve Landsat 8 uydu görüntüleri çalışmanın uygulаma safhasında kullanılmıştır. Bu çalışmаdа Alagöl Gölü’nün alanındaki ve kıyı şeridindeki değişimin olası nedenleri araştırılmıştır. Gölün kıyı şeridi değişimleri, çok zamanlı uydu görüntüleri ve uzaktan algılama teknikleri kullanılarak belirlenmiştir. 1993, 2009 ve 2018 yıllarına ait Landsat 5 ve Landsat 8 uydu görüntüleri kullanılmıştır. Gerekli geometrik düzeltmeler yapıldıktan sonra, gölün kapladığı alan ve kıyı şeridinin belirlenmesi için kontrollü sınıflandırma yöntemleri veri setine uygulаnmıştır. Sınıflandırmа uygulamasının dışında ayrıca modifiye normalize fark su indeksi de kullanılmış ve elde edilen görüntüler daha sonra CBS ortamında sayısallaştırılmıştır. Son olarak 1993-2018 yıllarında gölün kıyı şeridi değişimleri tespit edilmiştir.","PeriodicalId":138273,"journal":{"name":"7th International Students Science Congress Proceedings Book","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125810960","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":"Application of Spray Drying Process for Food Bioactive Compounds","authors":"E. Akca, Ö. Çağındı, E. Köse","doi":"10.52460/issc.2023.024","DOIUrl":"https://doi.org/10.52460/issc.2023.024","url":null,"abstract":"In addition to the essential nutrients found in the structure of foods, some compounds that have positive effects on health are gradually taking their place in nutritional recommendations. Food-derived bioactive are known as these non-nutritional compounds and are secondary metabolites of plants consisting of vitamins, minerals, fatty acids, phytosterols, polyphenols, anthocyanins, carotenoids, probiotics, and bioactive peptides. There are difficulties in ensuring the stabilization of bioactive compounds that have positive effects on human health during production, product, and storage periods. Encapsulation techniques are used to preserve these compounds from decreased biological activity, interaction with environmental conditions, physicochemical and organoleptic adverse effects. Micro and/or nanoencapsulation are an effective method that increases the stabilization of bioactive food compounds and enables their use in food systems. Among encapsulation technologies, spray drying, which is cost-effective, is one of the most frequently used methods for micro- and nano-sized encapsulation of different bioactive compounds, especially for the encapsulation of heat-sensitive compounds. The aim of this study was to provide an overview of the micro/nanoencapsulation of food-derived bioactive compounds by spray drying with different encapsulation agents and to investigate oxidative stress, temperature effect, storage stability, bioavailability as well as the advantages and disadvantages of this method..","PeriodicalId":138273,"journal":{"name":"7th International Students Science Congress Proceedings Book","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129253943","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":"Fig (Ficus carica) Valorization via ABE Fermentation into Organic Acids and Solvents","authors":"W. Abibu, I. Karapınar","doi":"10.52460/issc.2023.012","DOIUrl":"https://doi.org/10.52460/issc.2023.012","url":null,"abstract":"The concern on the adverse environmental effects of global warming and fossil fuel challenged human intellect to find renewable, sustainable and environmentally friendly fuel substitutes. This was fully supported by governmental and non-governmental organizations across the globe. The fig (Ficus carica) is an edible Mediterranean fruit that is abundantly cultivated in Turkiye. Waste figs are carcinogenic and toxigenic. Thus, it’s a good option to converting it into value added products. The main objective of this research is to study the effects of cations (Zn2+, Mg2+ and Mn+ ) and electron mediators (Neutral red and Methyl viologen) on the acetogenesis and solventogenesis stages of the ABE process. One factor at a time (OFAT) simple experimental design was employed in this study. Organicacids (lactic, acetic and butyric acid) and organic solvents (ethanol, acetone and butanol) are the main product of the ABE (Acetone-Butanol-Ethanol) fermentation. From the results, maximum concentrations of Lactic, acetic, butyric acid, ethanol, acetone and butanol were recorded at MV15(mg/L), Mg400(mg/L), Mg400 (mg/L) NR15(mg/L), Mn56(mg/L), and MV15(mg/L) respectively.","PeriodicalId":138273,"journal":{"name":"7th International Students Science Congress Proceedings Book","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133337114","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":"Green Biosynthesis of Silver Nanoparticles from Wild Mushroom (Ganoderma lucidum) First Time in Iraq","authors":"S. Sadiq, Sara Qahtan Sulaiman","doi":"10.52460/issc.2023.054","DOIUrl":"https://doi.org/10.52460/issc.2023.054","url":null,"abstract":"Nowadays there is an increasing interests about nanoparticle due to its application in medical and industrial products, green rout and safely producing of nanoparticles consider important for recent life technology, silver nanoparticles (AgNPs) one of the most safe compound to human and environment due to its low effect an low toxicity even with direct contacting and consuming release low particles of silver, for these reasons , the availability and low costing technology we produced silver nanoparticles from eco-friendly mushroom G. lucidum first time in Iraq. AgNPs were prepared by using aqueous extract of G. lucidium as a reducing agent for silver nitrate (AgNO3). The characteristics of silver- anoparticles were determined, including: Determining the highest absorption of silver nanoparticles by UV-VIS spectrophotometer, the shape and size of silver nanoparticles by atomic force microscopy (AFM), as well as determining the type of chemical bonds or functional groups bound to the prepared AgNPs by Fourier-transform infrared spectroscopy-FTIR. Scanning Electron Microscopy used for study of Particle size and shape. The results showed the emergence of a spectral imaging beam using a spectrophotometer that ranged between 350-900 nm, where the best absorption beam was at a wavelength of 450 nm, while the result of AFM showed the surface topography of silver nanoparticles with an average size of 62.78 nm. FTIR spectrum revealed strong absorption peaks 1091-3434 cm-1, as well as their role in the stability of these molecules. The size of spherical particles ranged between 17.15 - 25.81 nanometers under SEM.","PeriodicalId":138273,"journal":{"name":"7th International Students Science Congress Proceedings Book","volume":"25 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131320039","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":"A New Method for Elliptic Partial Differential Equations","authors":"Nurcan Baykuş Savaşaneril","doi":"10.52460/issc.2023.030","DOIUrl":"https://doi.org/10.52460/issc.2023.030","url":null,"abstract":"The study proposes a matrix method based on collocation points and Taylor polynomials for approximating the solution of elliptic partial differential equations. This method reduces the problem to solving a matrix equation with unknown Taylor coefficients, which are determined using the collocation points. The solution is then expressed in terms of Taylor polynomials. The technique is illustrated using a descriptive example, and the results are compared with a table and figure. The numerical calculations are performed using a program written in WOLFRAM MATHEMATICA 13.0.","PeriodicalId":138273,"journal":{"name":"7th International Students Science Congress Proceedings Book","volume":"76 15","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120821182","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":"Auxetic Thin-Walled Square Tubes Subjected to Oblique Loading","authors":"Dilek Atilla Yolcu, Fatih İlgen, B. O. Baba","doi":"10.52460/issc.2023.035","DOIUrl":"https://doi.org/10.52460/issc.2023.035","url":null,"abstract":"The use of auxetic structures with a negative Poisson’s ratio in thin-walled tubes, which are widely used in many fields, is one of the topics discussed recently. This is because re-entrant auxetic tubes are generally more resistant to loads such as compression and impact than conventional honeycomb structures due to their high indentation resistance. However, there is limited information in the literature regarding the use of these structures on different sides of the thin-walled tube. In addition, there are few studies on how the compressive behavior of the re-entrant auxetic structure changes when subjected to an oblique load. In this study, the effect of oblique loading on thin-walled square tubes with re-entrant and traditional honeycomb structures on the sides was investigated numerically. The side faces of the tubes were designed using auxetic re-entrant and conventional honeycomb cells with constant ligament properties. Four different types of square tubes were created with the designed re-entrant auxetic and conventional honeycomb side faces. These structures are; all side faces re-entrant (RRRR), all side faces honeycomb (HHHH), opposite side faces re-entrant-honeycomb (RHRH), and adjacent side faces re-entrant-honeycomb (RRHH). Oblique loads were applied to the edges and corners of these structures and their behavior was examined. The results showed that the use of different lattice structures on the thin-walled tubes significantly affected their behavior.","PeriodicalId":138273,"journal":{"name":"7th International Students Science Congress Proceedings Book","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122970522","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":"Dynamic Compressive Behavior of Glass/Epoxy Composites Using Split Hopkinson Pressure Bar","authors":"Aidel Kadum Jassim Al-Shamary, Abdulrahman N. Abed, R. Karakuzu","doi":"10.52460/issc.2023.042","DOIUrl":"https://doi.org/10.52460/issc.2023.042","url":null,"abstract":"In this study, E-glass/epoxy composites were subjected to Split Hopkinson Pressure Bar (SHPB) tests to obtain the compressive properties of composite under the different strain rate values. Composite materials were manufactured by vacuum assisted resin infusion moulding (VARIM) method. Then cylindrical SHPB specimens with 6 mm diameter and 6 mm height were obtained by cutting the composite with water jet through the thickness. E-glass/epoxy specimen was connected to the SHPB test apparatus. The variation of strain according to time was obtained by using axial strain-gage. Then compressive stresses were calculated by using strain values, the modulus of elasticity and the area of the pressure bar, and the area of specimen. The variations of engineering stress according to the engineering strain and time, and engineering strain rate vs time were obtained under different velocities or strain rates. The results shows that velocity or strain rate has a significant effect on compressive properties of E-glass/epoxy composite.","PeriodicalId":138273,"journal":{"name":"7th International Students Science Congress Proceedings Book","volume":"313 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131909714","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":"A Design Perspective on the Stability of Timber Beams Under Lateral Torsional Buckling","authors":"Melike Sarıahmet, Oğuzhan Toğay","doi":"10.52460/issc.2023.015","DOIUrl":"https://doi.org/10.52460/issc.2023.015","url":null,"abstract":"Lateral torsional buckling (LTB) of timber beams is an important out-of-plane behavior mode due to large depth/width ratios and long span lengths, as in steel beams. A beam that is subjected to a lateral torsional buckling failure would deform under an applied load or moment until the critical moment (Mcr) is reached, after that, a slight increase in the applied moment will create large out-of- plane deformations, and the beam will buckle by deflecting laterally and twisting. If the compression zone of the beam is braced by using out-of-plane nodal lateral bracing, these deformations can be prevented. In timber structures, specifications of the nodal bracing for timber beams are not clear enough to provide easy-to-use calculations in Eurocode 5. This study aims to investigate the optimum level of the bracing stiffness using the brace force - brace stiffness relationship, so that bracing calculations are easier to be applied. As the nature of nodal bracing, it is expected to observe lesser brace forces as the brace stiffness increases. However, this effect balanced itself at optimum brace stiffness. After the ideal stiffness value is reached, any brace stiffness greater than this value does not increase substantially the buckling capacity of the beam. In this paper, the study is conducted using a validation of Finite Element Analysis (FEA) coupled with experimental studies from the literature. Also, different sizes of the specimens were generated using the FEA procedure to conduct a matrix of cases that includes both brace stiffnesses and sizes of timber beams. These matrices are then presented in graphs that demonstrate the optimum level to stabilize the beams. The Eurocode 5 effective length design concept was used for the calculations. This study provides easy-to-use bracing calculations to reduce the effect of LTB on timber beams.","PeriodicalId":138273,"journal":{"name":"7th International Students Science Congress Proceedings Book","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115581185","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":"Industry 4.0 Based Digital Supply Chain Business Analysis","authors":"Yağızalp Urgancı, M. Çevik","doi":"10.52460/issc.2023.029","DOIUrl":"https://doi.org/10.52460/issc.2023.029","url":null,"abstract":"Industry 4.0 is a period in which advanced digital technologies are integrated into production processes. In this period, technologies such as automation, data analysis, artificial intelligence and the internet of things are used to increase the efficiency of enterprises, optimize their operational processes and gain competitive advantage. In today's rapidly developing technology, the business world is constantly changing and transforming. Industry 4.0 is the most obvious example of this transformation. Industry 4.0 is a period in which advanced digital technologies are integrated into production processes and includes the use of technologies such as automation, data analysis, artificial intelligence and the internet of things. However, business analysis is of great importance in order to understand the value these technologies provide to businesses and to use them in the best way. Business analysis enables businesses to analyze data, evaluate their processes, improve them and determine their future strategies. Industry 4.0 offers new opportunities for business analysis. In particular, the increase in the amount of data in production processes and the use of advanced digital technologies have made the role of business analysis even more important. With Industry 4.0, business analysis has become a basic tool used to increase the efficiency of enterprises, optimize their operational processes and gain competitive advantage. With data analysis and business intelligence techniques, businesses can analyze their production processes, evaluate productivity levels, detect errors and identify opportunities for improvement. While automation and artificial intelligence help businesses optimize their processes and increase efficiency, business analysis can analyze the performance of these technologies and identify areas for improvement in processes. These factors have caused businesses to review their supply chain strategies. Therefore, businesses that want to remain competitive must manage their supply chains effectively and efficiently. For this, real-time information sharing and coordination between supply chain partners should be ensured. Activities such as organizing purchasing, production and distribution processes, stock management, improving supplier relations, receiving customer feedback quickly and responding to demands effectively and efficiently will be possible with the digitalization of the traditional supply chain. In this study, it is aimed to explain the general structure of the digital supply chain, which facilitates and makes the supply chain activities of the enterprises efficient. For this purpose, a general literature review has been made about the general structure of the digital supply chain, its relationship with industry 4.0, the transformation from the traditional supply chain to the digital supply chain, the haracteristics of the digital supply chain, combining these basic elements with business analysis, its basic characteristics","PeriodicalId":138273,"journal":{"name":"7th International Students Science Congress Proceedings Book","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123923218","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}