As waste production is becoming more widely recognized as a significant issue, particularly in developing nations, rising food consumption and population growth have caused environmental degradation and health crises. Nigeria's waste collection and disposal problems are commonly associated with environmental pollution and health crises. Consequently, throwing garbage on roads during environmental sanitation, is a typical method of waste disposal, leading to large piles of refuse along the roadside, which hinders the nation's beauty. Therefore, for Nigeria's waste management system to be effective, sustainable smart bins with efficient Internet of Things (IoT) applications must be quickly adopted to create a green, clean atmosphere within cities. Smart bins with integrated IoT can provide a sustainable future for cities' waste management.. This model seeks to develop a low-cost, intelligent waste bin system with IoT technology. Sensors and data sharing over a Wi-Fi network, allow for remote control of the waste bin, leading to improved optimization of the bin's level of waste. The economic benefits of this IoT-based system include remote access for efficient level control, lower labour costs, improved time and energy efficiency, and reduced congestion in waste bins.
{"title":"Smart Bin and IoT: A Sustainable Future for Waste Management System in Nigeria","authors":"A. Okubanjo, B. Odufuwa, A. Okandeji, E. Daniel","doi":"10.35378/gujs.1254271","DOIUrl":"https://doi.org/10.35378/gujs.1254271","url":null,"abstract":"As waste production is becoming more widely recognized as a significant issue, particularly in developing nations, rising food consumption and population growth have caused environmental degradation and health crises. Nigeria's waste collection and disposal problems are commonly associated with environmental pollution and health crises. Consequently, throwing garbage on roads during environmental sanitation, is a typical method of waste disposal, leading to large piles of refuse along the roadside, which hinders the nation's beauty. Therefore, for Nigeria's waste management system to be effective, sustainable smart bins with efficient Internet of Things (IoT) applications must be quickly adopted to create a green, clean atmosphere within cities. Smart bins with integrated IoT can provide a sustainable future for cities' waste management.. This model seeks to develop a low-cost, intelligent waste bin system with IoT technology. Sensors and data sharing over a Wi-Fi network, allow for remote control of the waste bin, leading to improved optimization of the bin's level of waste. The economic benefits of this IoT-based system include remote access for efficient level control, lower labour costs, improved time and energy efficiency, and reduced congestion in waste bins.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49075808","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}
The performance of a tunnel furnace and a tunnel dryer in a brick production was exergoenvironmentally assessed. The real production data of a brick factory in Turkey with a daily production capacity of 392 tons of fired bricks were used in the analysis. The exergoenvironmental factor of the control volume was calculated as 0.87. The specific exergoenvironmental cost of the control volume was determined to be 559.55 €/h, 3.39 €cent/ kg fired brick and 1.94 €cent/MJ. The specific exergoeconomic cost and the environmental damage prevention cost were obtained to be 0.41 € cent/MJ and 1.53 € cent/MJ, respectively. Because the ratio of exergoenvironmental cost to sales price of 2.41 € cent / kg fired brick was 1.41 (above 1), it was concluded that the brick production in Turkey was not sustainable in terms of exergoenvironmental analysis.
{"title":"Theoretical Exergoenvironmental Analysis of a Tunnel Furnace and Drying System in a Brick Production","authors":"Gurhan Tahtali, H. Olgun, M. Günes, A. Hepbasli","doi":"10.35378/gujs.1052416","DOIUrl":"https://doi.org/10.35378/gujs.1052416","url":null,"abstract":"The performance of a tunnel furnace and a tunnel dryer in a brick production was exergoenvironmentally assessed. The real production data of a brick factory in Turkey with a daily production capacity of 392 tons of fired bricks were used in the analysis. The exergoenvironmental factor of the control volume was calculated as 0.87. The specific exergoenvironmental cost of the control volume was determined to be 559.55 €/h, 3.39 €cent/ kg fired brick and 1.94 €cent/MJ. The specific exergoeconomic cost and the environmental damage prevention cost were obtained to be 0.41 € cent/MJ and 1.53 € cent/MJ, respectively. Because the ratio of exergoenvironmental cost to sales price of 2.41 € cent / kg fired brick was 1.41 (above 1), it was concluded that the brick production in Turkey was not sustainable in terms of exergoenvironmental analysis.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49249919","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}
Sonya Javadi̇, Ali İhsan Özer, Olcay Keten, Remziye Zeynep Alkan
The COVID-19 pandemic has already crippled normal life all over the world. Its negative effect not only changed the human health system tragically but also disrupted the global economic system. One result of such negative disruption was on the food supply chain. The strict lockdown has suspended the manufacturing and logistic activities and therefore, the consumers experienced unimaginable chose on the grocery markets which has never faced before. Along with this mess, the shopping behavior of the consumers has remarkably changed compared to pre-pandemic. To meet this new demand pattern, many large convenience stores and small retailers tried to adapt to the new normal. While a standard way to manage the grocery supply chain before the pandemic was the offline system, after the pandemic, the online service got tremendous attention from the consumers. In this study, the online grocery supply chain management during the Covid-19 in Istanbul is considered. The purpose is to find out how more efficient online services can be provided during the pandemic. To do so, first, some questions related to online grocery shopping were asked and three major grocery retailers in Istanbul which have provided online services were taken. Then, a survey was conducted to understand the consumer’s experience with respect to online shopping at these stores. Following that, the performances of the companies and their SWOT analyses were discussed. Finally, some strategic recommendations were given to the companies to manage their online services throughout the pandemic and post-pandemic.
{"title":"The Impact of the COVID-19 Pandemic on Online Grocery Supply Chain Management: A Case Study in Istanbul","authors":"Sonya Javadi̇, Ali İhsan Özer, Olcay Keten, Remziye Zeynep Alkan","doi":"10.35378/gujs.1025914","DOIUrl":"https://doi.org/10.35378/gujs.1025914","url":null,"abstract":"The COVID-19 pandemic has already crippled normal life all over the world. Its negative effect not only changed the human health system tragically but also disrupted the global economic system. One result of such negative disruption was on the food supply chain. The strict lockdown has suspended the manufacturing and logistic activities and therefore, the consumers experienced unimaginable chose on the grocery markets which has never faced before. Along with this mess, the shopping behavior of the consumers has remarkably changed compared to pre-pandemic. To meet this new demand pattern, many large convenience stores and small retailers tried to adapt to the new normal. While a standard way to manage the grocery supply chain before the pandemic was the offline system, after the pandemic, the online service got tremendous attention from the consumers. In this study, the online grocery supply chain management during the Covid-19 in Istanbul is considered. The purpose is to find out how more efficient online services can be provided during the pandemic. To do so, first, some questions related to online grocery shopping were asked and three major grocery retailers in Istanbul which have provided online services were taken. Then, a survey was conducted to understand the consumer’s experience with respect to online shopping at these stores. Following that, the performances of the companies and their SWOT analyses were discussed. Finally, some strategic recommendations were given to the companies to manage their online services throughout the pandemic and post-pandemic.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45941430","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}
Coupled shear walls with coupling beams are constructed because of openings such as doors, windows, or other installations that are left behind due to functional reasons in shear walls. The seismic behavior of coupled shear walls with coupling beams depends on the structural performance of the coupling beams. In coupling beams having a ratio of span-to-depth less than two, shear fracture occurs rather than flexural fracture. In order to meet the shear force and the bending moment formed by the coupling beams, diagonal bundles are used in the coupling beams. Diagonal reinforced coupling beams are generally preferred because diagonal reinforced coupling beams exhibit better behavior than conventional reinforced coupling beams. The diagonal reinforcement bundles have to be confined by transverse reinforcements prescribed in the codes. Confined concrete in the diagonal reinforcement bundles has stress-strain characteristics that are distinctly different from those of plain concrete. The effects of longitudinal and transverse reinforcement ratios on the stress-strain behavior of confined concrete inside the diagonal reinforcement bundles were investigated. Fifty-four reinforced concrete coupling beams with different confining parameters of the diagonal reinforcement bundles and different variables were analyzed using the program. It was demonstrated that the strength and the maximum strain of the concrete inside the diagonal reinforcement bundles increase with the reinforcement ratio of the confinement reinforcement. The increase in the diameter of the transverse reinforcement and the decrease in the transverse reinforcement spacing in the diagonal bundles, increase the confining effect in the concrete sections, increasing the ductility and strength, and has a significant effect on the seismic behavior of the coupling beams.
{"title":"Nonlinear Behavior of the Concrete Core of the Diagonally Reinforced Coupling Beams","authors":"Saeid Foroughi, Bahadır Yüksel","doi":"10.35378/gujs.1233545","DOIUrl":"https://doi.org/10.35378/gujs.1233545","url":null,"abstract":"Coupled shear walls with coupling beams are constructed because of openings such as doors, windows, or other installations that are left behind due to functional reasons in shear walls. The seismic behavior of coupled shear walls with coupling beams depends on the structural performance of the coupling beams. In coupling beams having a ratio of span-to-depth less than two, shear fracture occurs rather than flexural fracture. In order to meet the shear force and the bending moment formed by the coupling beams, diagonal bundles are used in the coupling beams. Diagonal reinforced coupling beams are generally preferred because diagonal reinforced coupling beams exhibit better behavior than conventional reinforced coupling beams. The diagonal reinforcement bundles have to be confined by transverse reinforcements prescribed in the codes. Confined concrete in the diagonal reinforcement bundles has stress-strain characteristics that are distinctly different from those of plain concrete. The effects of longitudinal and transverse reinforcement ratios on the stress-strain behavior of confined concrete inside the diagonal reinforcement bundles were investigated. Fifty-four reinforced concrete coupling beams with different confining parameters of the diagonal reinforcement bundles and different variables were analyzed using the program. It was demonstrated that the strength and the maximum strain of the concrete inside the diagonal reinforcement bundles increase with the reinforcement ratio of the confinement reinforcement. The increase in the diameter of the transverse reinforcement and the decrease in the transverse reinforcement spacing in the diagonal bundles, increase the confining effect in the concrete sections, increasing the ductility and strength, and has a significant effect on the seismic behavior of the coupling beams.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42692027","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}
The q-rung linear Diophantine fuzzy set is a recently developed tool to handle with uncertain and awkward information in real-life issues and is applicable where reference parameter-based opinions. Similarity measures are distance with dimensions representing features of the objects. Keeping the advantages of the above analysis, this paper proposes similarity measures based on exponential function for q-rung linear Diophantine fuzzy sets and thus presents the first formulas for calculating the similarity coefficient between two q-rung linear Diophantine fuzzy sets. These proposed similarity measures are applied to the clustering problem and the results are analyzed. In addition, the comparison outputs of the new similarity measures are discussed to ensure their good performance.
{"title":"Exponential Function-Based Similarity Measures for q-Rung Linear Diophantine Fuzzy Sets and Their Application to Clustering Problem","authors":"S. Petchimuthu, Hüseyin Kamacı","doi":"10.35378/gujs.1013358","DOIUrl":"https://doi.org/10.35378/gujs.1013358","url":null,"abstract":"The q-rung linear Diophantine fuzzy set is a recently developed tool to handle with uncertain and awkward information in real-life issues and is applicable where reference parameter-based opinions. Similarity measures are distance with dimensions representing features of the objects. Keeping the advantages of the above analysis, this paper proposes similarity measures based on exponential function for q-rung linear Diophantine fuzzy sets and thus presents the first formulas for calculating the similarity coefficient between two q-rung linear Diophantine fuzzy sets. These proposed similarity measures are applied to the clustering problem and the results are analyzed. In addition, the comparison outputs of the new similarity measures are discussed to ensure their good performance.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47196815","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}
Obtaining and storing large amounts of data have become easier with the rapidly developing information technologies (IT). However, the data generated and collected, which are irrelevant in and of themselves, become useful only when they are analyzed for a specific reason. Data mining may transform raw data into useful information. In the present study, classification and analysis of denim fabric quality characteristics according to denim fabric production parameters were carried out. The present study proposes a new classification rule inference algorithm. The suggested approach is mostly based on Artificial Bee Colony Optimization (ABC), a swarm intelligence meta-heuristic. In each step of the algorithm, there are two phases called the employed bee phase and the onlooker bee phase. This algorithm has been compared with the classification algorithms in the related literature. This proposed algorithm is a new data mining tool that intelligently combines various metaheuristic and neural networks and can generate classification rules. The results indicate that the proposed data mining algorithms may be highly useful in determining weight and width in denim fabric manufacture.
{"title":"Developed ABCLASS-Miner Classification Algorithm Based Rule Extraction for Denim Fabrics","authors":"Gözde Katircioğlu, Emel Kizilkaya Aydoğan, Esra Akgul, Yılmaz Delice","doi":"10.35378/gujs.1185130","DOIUrl":"https://doi.org/10.35378/gujs.1185130","url":null,"abstract":"Obtaining and storing large amounts of data have become easier with the rapidly developing information technologies (IT). However, the data generated and collected, which are irrelevant in and of themselves, become useful only when they are analyzed for a specific reason. Data mining may transform raw data into useful information. In the present study, classification and analysis of denim fabric quality characteristics according to denim fabric production parameters were carried out. The present study proposes a new classification rule inference algorithm. The suggested approach is mostly based on Artificial Bee Colony Optimization (ABC), a swarm intelligence meta-heuristic. In each step of the algorithm, there are two phases called the employed bee phase and the onlooker bee phase. This algorithm has been compared with the classification algorithms in the related literature. This proposed algorithm is a new data mining tool that intelligently combines various metaheuristic and neural networks and can generate classification rules. The results indicate that the proposed data mining algorithms may be highly useful in determining weight and width in denim fabric manufacture.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48598620","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}
Merve Güneş, B. Yalçın, Ayşen Yağmur Kurşun, Ghada Tagorti, Emre Yavuz, E. Akarsu, N. Kaya, Bülent Kaya
Biomaterials are engineering products that are widely used in many medical fields such as orthopaedic applications, facial and maxillofacial surgery, artificial heart parts, metal parts and implantable devices. These materials are widely used in medicine because they are compatible with the organism, are not allergic, and are resistant to physical and chemical factors. Hydroxyapatites are bioactive calcium phosphate ceramics that are compatible with tissues. To increase their bioactivity, nano-sized hydroxyapatite has been produced. Although there are advantages to the use of nanoparticles in the medical field, the potentially toxic effects of these materials on the environment and human health are of concern. It is also one of the topics to be investigated whether the different forms of the same nanoparticle will cause differences in genotoxicity. In this study, the potential genotoxic effects of rod and round forms of nano-sized hydroxyapatites (nHAs) were evaluated in Allium cepa Single Cell Gel Electrophoresis (COMET) method. According to the results, the round form of nHA in the A. cepa meristem root tip cells caused statistically significant genotoxicity at 25 ppm concentration in terms of tail density and tail moment. This study showed small-sized-nanohydroxyapatite-induced genotoxicity and cell death in A. cepa. This study has shown that the physical properties of nanoparticles affect potential toxicity mechanisms.
{"title":"The Effects of Rod and Round-Like Nanohydroxyapatites on Allium cepa Root Meristem Cells","authors":"Merve Güneş, B. Yalçın, Ayşen Yağmur Kurşun, Ghada Tagorti, Emre Yavuz, E. Akarsu, N. Kaya, Bülent Kaya","doi":"10.35378/gujs.1218829","DOIUrl":"https://doi.org/10.35378/gujs.1218829","url":null,"abstract":"Biomaterials are engineering products that are widely used in many medical fields such as orthopaedic applications, facial and maxillofacial surgery, artificial heart parts, metal parts and implantable devices. These materials are widely used in medicine because they are compatible with the organism, are not allergic, and are resistant to physical and chemical factors. Hydroxyapatites are bioactive calcium phosphate ceramics that are compatible with tissues. To increase their bioactivity, nano-sized hydroxyapatite has been produced. Although there are advantages to the use of nanoparticles in the medical field, the potentially toxic effects of these materials on the environment and human health are of concern. It is also one of the topics to be investigated whether the different forms of the same nanoparticle will cause differences in genotoxicity. In this study, the potential genotoxic effects of rod and round forms of nano-sized hydroxyapatites (nHAs) were evaluated in Allium cepa Single Cell Gel Electrophoresis (COMET) method. According to the results, the round form of nHA in the A. cepa meristem root tip cells caused statistically significant genotoxicity at 25 ppm concentration in terms of tail density and tail moment. This study showed small-sized-nanohydroxyapatite-induced genotoxicity and cell death in A. cepa. This study has shown that the physical properties of nanoparticles affect potential toxicity mechanisms.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46673680","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 paper describes an analysis of lengthwise fracture in a viscoelastic inhomogeneous cantilever beam configuration under strain that is a sinusoidal function of time. The mechanical behaviour of the beam is treated by a viscoelastic model having two linear springs and a linear dashpot. The beam is continuously inhomogeneous along its thickness. Therefore, the modulii of elasticity of the springs and the coefficient of viscosity of the dashpot vary smoothly along the thickness of the beam. The compliance method is applied to derive a solution of the strain energy release rate for the lengthwise crack in the beam structure. The J-integral is used for verification. The stress-strain-time dependence of the viscoelastic model is applied for describing the behavior of the beam when obtaining solutions of the strain energy release rate and the J-integral. Solutions are derived for both positive and negative angle of rotation of the lower crack arm free end (when the angle is positive, the upper crack arm is free of stresses, while at negative angle both crack arms are loaded). The effects of various factors including the sign of the angle of rotation on the strain energy release rate are analyzed.
{"title":"Lengthwise Fracture Analysis of Inhomogeneous Viscoelastic Cantilever Beam Subjected to Sinusoidal Strains","authors":"Victor RİZOV","doi":"10.35378/gujs.1062749","DOIUrl":"https://doi.org/10.35378/gujs.1062749","url":null,"abstract":"This paper describes an analysis of lengthwise fracture in a viscoelastic inhomogeneous cantilever beam configuration under strain that is a sinusoidal function of time. The mechanical behaviour of the beam is treated by a viscoelastic model having two linear springs and a linear dashpot. The beam is continuously inhomogeneous along its thickness. Therefore, the modulii of elasticity of the springs and the coefficient of viscosity of the dashpot vary smoothly along the thickness of the beam. The compliance method is applied to derive a solution of the strain energy release rate for the lengthwise crack in the beam structure. The J-integral is used for verification. The stress-strain-time dependence of the viscoelastic model is applied for describing the behavior of the beam when obtaining solutions of the strain energy release rate and the J-integral. Solutions are derived for both positive and negative angle of rotation of the lower crack arm free end (when the angle is positive, the upper crack arm is free of stresses, while at negative angle both crack arms are loaded). The effects of various factors including the sign of the angle of rotation on the strain energy release rate are analyzed.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135223036","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}
Turbines are mechanical devices that convert fluid motion into rotational motion. In this study, water wave is used as fluid. Ansys Fluent's Volume Of Fluid (VOF) model is used and regular waves are obtained to analyze the movement of the turbine in the wave tank. The force, pressure, moment and speed of the turbine are important to obtain electrical energy from wave energy. For this reason, in this study, the change of these parameters with the effect of the wave is examined. It is observed that these parameter values increased with increasing wave height. It is observed that the dynamic pressure and moment of the turbine rise with the increase of the wavelength. However, the speed of rotation of the turbine decreased with the increase of the wavelength. The force coming to the blades did not change with the increase of the wavelength, it only caused a delay in time. However, it was observed that a very high force was applied to the turbine blades with a wave height of 2 m and this value reached 8000 N. In addition, the maximum turbine speed was obtained at a wavelength of 2 m and a wavelength of 20 m, reaching 87 mm / s.
{"title":"Turbine Type Rotary Wave Energy Converter Performance","authors":"Perihan Karaköse, A. Koca","doi":"10.35378/gujs.1160148","DOIUrl":"https://doi.org/10.35378/gujs.1160148","url":null,"abstract":"Turbines are mechanical devices that convert fluid motion into rotational motion. In this study, water wave is used as fluid. Ansys Fluent's Volume Of Fluid (VOF) model is used and regular waves are obtained to analyze the movement of the turbine in the wave tank. The force, pressure, moment and speed of the turbine are important to obtain electrical energy from wave energy. For this reason, in this study, the change of these parameters with the effect of the wave is examined. It is observed that these parameter values increased with increasing wave height. It is observed that the dynamic pressure and moment of the turbine rise with the increase of the wavelength. However, the speed of rotation of the turbine decreased with the increase of the wavelength. The force coming to the blades did not change with the increase of the wavelength, it only caused a delay in time. However, it was observed that a very high force was applied to the turbine blades with a wave height of 2 m and this value reached 8000 N. In addition, the maximum turbine speed was obtained at a wavelength of 2 m and a wavelength of 20 m, reaching 87 mm / s.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42975699","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}
Cell growth inhibition is generally handled as a measure of toxicity. Shortly, more toxicity implies more growth inhibition. Then, the question arises; How to calculate & evaluate cell growth inhibition in a universal manner? Actually, the method for calculating growth inhibition is not considered to be a central issue, in general. There are various approaches for calculating cell growth. Among these approaches, two of them are highly easy and popular, subtraction-based and division-based calculations. However, these two methods for the calculation of cell growth do not strongly reflect the nature of cell growth. Alternatively, the use of a doubling number-based formulation can provide a better approach and performance in the evaluation of cell growth and cell growth inhibition unless the culture attains the confluent status. Here, we discussed different methods of growth calculation which we applied to the study of “growth inhibition of BY-2 cells under Cd exposure”.
{"title":"Use of Doubling Number as an Arithmetic Measure of Plant Cell Growth and Metal-Induced Cell Growth Inhibition","authors":"M. Metin, T. Kawano","doi":"10.35378/gujs.1244209","DOIUrl":"https://doi.org/10.35378/gujs.1244209","url":null,"abstract":"Cell growth inhibition is generally handled as a measure of toxicity. Shortly, more toxicity implies more growth inhibition. Then, the question arises; How to calculate & evaluate cell growth inhibition in a universal manner? Actually, the method for calculating growth inhibition is not considered to be a central issue, in general. There are various approaches for calculating cell growth. Among these approaches, two of them are highly easy and popular, subtraction-based and division-based calculations. However, these two methods for the calculation of cell growth do not strongly reflect the nature of cell growth. Alternatively, the use of a doubling number-based formulation can provide a better approach and performance in the evaluation of cell growth and cell growth inhibition unless the culture attains the confluent status. Here, we discussed different methods of growth calculation which we applied to the study of “growth inhibition of BY-2 cells under Cd exposure”.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":" ","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44047569","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：