Pub Date : 2023-01-01DOI: 10.14744/sigma.2023.00104
Neeraj S. N
The pedestrians are the most exposed amongest all road traffic users to the possibility of being attacked or harmed, either physically or emotionally. In the present investigational study, an attempt is made to develop the model on pedestrian road crossing behaviour by considering the elements of pedestrian crossing behaviour, especially the size of the vehicular gap accepted by pedestrians and also pedestrians decision to cross or not cross the road. A field investigation was carried out at two zebra crossing facilities located at two major roundabouts in Shivamogga city. Data collection and extraction was done by utilising video-graphic data in real-time traffic conditions by the Department of Traffic Police, Shivamogga and also, by observing the behaviour of pedestrians while crossing the road. The study will also aid in determining correlations between pedestrian characteristics, crossing facilities, and vehicular traffic. This data will be analysed by regression methods in statistical analysis. As a result of this research, it is intended that a model of pedestrian gap acceptance and pedestrian crossing choice could be developed that also includes the factors that pedestrians look for when accepting the vehicle gaps between the vehicles to cross the crosswalks in roundabouts
{"title":"Study on pedestrian crossing decision at the roundabouts","authors":"Neeraj S. N","doi":"10.14744/sigma.2023.00104","DOIUrl":"https://doi.org/10.14744/sigma.2023.00104","url":null,"abstract":"The pedestrians are the most exposed amongest all road traffic users to the possibility of being attacked or harmed, either physically or emotionally. In the present investigational study, an attempt is made to develop the model on pedestrian road crossing behaviour by considering the elements of pedestrian crossing behaviour, especially the size of the vehicular gap accepted by pedestrians and also pedestrians decision to cross or not cross the road. A field investigation was carried out at two zebra crossing facilities located at two major roundabouts in Shivamogga city. Data collection and extraction was done by utilising video-graphic data in real-time traffic conditions by the Department of Traffic Police, Shivamogga and also, by observing the behaviour of pedestrians while crossing the road. The study will also aid in determining correlations between pedestrian characteristics, crossing facilities, and vehicular traffic. This data will be analysed by regression methods in statistical analysis. As a result of this research, it is intended that a model of pedestrian gap acceptance and pedestrian crossing choice could be developed that also includes the factors that pedestrians look for when accepting the vehicle gaps between the vehicles to cross the crosswalks in roundabouts","PeriodicalId":45000,"journal":{"name":"Sigma Journal of Engineering and Natural Sciences-Sigma Muhendislik ve Fen Bilimleri Dergisi","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136368233","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 : 2023-01-01DOI: 10.14744/sigma.2023.00107
Nima ZOGHIPOUR
The use of brass alloys in pipelines and other fluid-carrying systems is widely recognized. The rolled or extruded bars are often machined to produce the manufactured products from these materials. When incredible machinability is required, leaded brasses are frequently employed. Leaded brass usage is prohibited, nevertheless, in systems that deal with environmental and human health hazards. In this study, three types of available brasses in EUA7038 (Brass for European Potable Water Applications List) leaded (CW617N), low-leaded (CW511L) and lead-free (CW724R) brasses haves been taken into consideration in terms of machinability; cutting forces, entry and exit burr height, subsurface microhardness, and microstructures. Experiments have been performed using several levels of feed and cutting speed on the mentioned materials during drilling tests. According to the obtained results, compared to leaded brass materials, low-leaded and lead-free brass materials showed more subsurface deformation. CW511L displays a sharper amendment rate of the in both entry and exit burr height with an increase in feed compared to CW724R and CW617N. It is significant to note that the machinability values for CW511L, CW724R, and CW617N are 1.4, 1.8, and 1.95 times, respectively.
{"title":"A comparative study on the machining performance of eco-friendly low-lead and lead-free brass alloys in replacement for leaded ones","authors":"Nima ZOGHIPOUR","doi":"10.14744/sigma.2023.00107","DOIUrl":"https://doi.org/10.14744/sigma.2023.00107","url":null,"abstract":"The use of brass alloys in pipelines and other fluid-carrying systems is widely recognized. The rolled or extruded bars are often machined to produce the manufactured products from these materials. When incredible machinability is required, leaded brasses are frequently employed. Leaded brass usage is prohibited, nevertheless, in systems that deal with environmental and human health hazards. In this study, three types of available brasses in EUA7038 (Brass for European Potable Water Applications List) leaded (CW617N), low-leaded (CW511L) and lead-free (CW724R) brasses haves been taken into consideration in terms of machinability; cutting forces, entry and exit burr height, subsurface microhardness, and microstructures. Experiments have been performed using several levels of feed and cutting speed on the mentioned materials during drilling tests. According to the obtained results, compared to leaded brass materials, low-leaded and lead-free brass materials showed more subsurface deformation. CW511L displays a sharper amendment rate of the in both entry and exit burr height with an increase in feed compared to CW724R and CW617N. It is significant to note that the machinability values for CW511L, CW724R, and CW617N are 1.4, 1.8, and 1.95 times, respectively.","PeriodicalId":45000,"journal":{"name":"Sigma Journal of Engineering and Natural Sciences-Sigma Muhendislik ve Fen Bilimleri Dergisi","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135157007","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 : 2023-01-01DOI: 10.14744/sigma.2023.00100
Osman Bahadır ÖZDEN
{"title":"Determination of stress magnification factor in welded joint by experimental and numerical analysis using ultra-high-strength steel","authors":"Osman Bahadır ÖZDEN","doi":"10.14744/sigma.2023.00100","DOIUrl":"https://doi.org/10.14744/sigma.2023.00100","url":null,"abstract":"","PeriodicalId":45000,"journal":{"name":"Sigma Journal of Engineering and Natural Sciences-Sigma Muhendislik ve Fen Bilimleri Dergisi","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135908923","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 : 2023-01-01DOI: 10.14744/sigma.2023.00105
M.K. SHARMA
In this study, Genetic Algorithm (GA), a sort of randomized direct, iterative search methodology built around natural selection, is employ in computers to discover approximations of solutions to optimisation and search issues. GA employs operators including selection, crossover, and mutation to tackle. In case of NP-hard issues, particularly for travelling salesman problem (TSP), the GAs is beneficial. To reduce the overall distance, we propose a novel crossover operator with its python code for the TSP. Along with the Python pseudo coding, we additionally introduced a mutation operator to enhance the consummation of GA in determining the shortest distance in the TSP. To emphasize the proposed crossover and mutation operator, we also illustrate different steps using examples. We integrated path representation with our developed crossover and mutation operator as it is apparent method to represent a tour.
{"title":"Modified genetic algorithm with novel crossover and mutation operator for travelling salesman problem","authors":"M.K. SHARMA","doi":"10.14744/sigma.2023.00105","DOIUrl":"https://doi.org/10.14744/sigma.2023.00105","url":null,"abstract":"In this study, Genetic Algorithm (GA), a sort of randomized direct, iterative search methodology built around natural selection, is employ in computers to discover approximations of solutions to optimisation and search issues. GA employs operators including selection, crossover, and mutation to tackle. In case of NP-hard issues, particularly for travelling salesman problem (TSP), the GAs is beneficial. To reduce the overall distance, we propose a novel crossover operator with its python code for the TSP. Along with the Python pseudo coding, we additionally introduced a mutation operator to enhance the consummation of GA in determining the shortest distance in the TSP. To emphasize the proposed crossover and mutation operator, we also illustrate different steps using examples. We integrated path representation with our developed crossover and mutation operator as it is apparent method to represent a tour.","PeriodicalId":45000,"journal":{"name":"Sigma Journal of Engineering and Natural Sciences-Sigma Muhendislik ve Fen Bilimleri Dergisi","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136368241","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 : 2023-01-01DOI: 10.14744/sigma.2023.00103
Meghdad JAHROMI
Strategy maps have drawn serious attention from companies in recent years due to their effective performance in organizations' success. Different approaches have been taken to build these maps in the related literature. A strategy map is focused on the cause-and-effect relationship between lag and lead objectives. On the other hand, most methods used for this purpose work based on past performance and do not pay attention to the future. In this paper, a method is presented to build a scenario-based strategy map, trying to consider all the future conditions and choose the most stable strategic objectives (goals) based on the outcome of all situations and analyse the relationships between them. The purpose of this work is to present a hybrid and at the same time practical and simple method of developing the company's strategy map in such a way that includes strategic objectives and their relationships so that they are common in all possible future scenarios. This method considers different scenarios and strategic objectives concerning experts' points of view about the relationship importance between strategic objectives. In the proposed method, by using the paired comparisons technique and linear programming, in the first phase, the optimal strategy map is built for each scenario, and in the second phase using a heuristic method and expert judgments, the final strategy map is built, which is the result of all the maps of the first phase. The presented method tries to consider all future scenarios and builds a map that will be more valid in the future; it is called a robust strategy map. This method was used by the strategic planning department in a real case and the final strategy map built by the proposed method was outstanding and reliable so that it is simply constructed and understandable for all stakeholders. Furthermore, it explains the strategy of the organization well.
{"title":"A method for building a robust strategy map using mathematical programming considering different scenarios","authors":"Meghdad JAHROMI","doi":"10.14744/sigma.2023.00103","DOIUrl":"https://doi.org/10.14744/sigma.2023.00103","url":null,"abstract":"Strategy maps have drawn serious attention from companies in recent years due to their effective performance in organizations' success. Different approaches have been taken to build these maps in the related literature. A strategy map is focused on the cause-and-effect relationship between lag and lead objectives. On the other hand, most methods used for this purpose work based on past performance and do not pay attention to the future. In this paper, a method is presented to build a scenario-based strategy map, trying to consider all the future conditions and choose the most stable strategic objectives (goals) based on the outcome of all situations and analyse the relationships between them. The purpose of this work is to present a hybrid and at the same time practical and simple method of developing the company's strategy map in such a way that includes strategic objectives and their relationships so that they are common in all possible future scenarios. This method considers different scenarios and strategic objectives concerning experts' points of view about the relationship importance between strategic objectives. In the proposed method, by using the paired comparisons technique and linear programming, in the first phase, the optimal strategy map is built for each scenario, and in the second phase using a heuristic method and expert judgments, the final strategy map is built, which is the result of all the maps of the first phase. The presented method tries to consider all future scenarios and builds a map that will be more valid in the future; it is called a robust strategy map. This method was used by the strategic planning department in a real case and the final strategy map built by the proposed method was outstanding and reliable so that it is simply constructed and understandable for all stakeholders. Furthermore, it explains the strategy of the organization well.","PeriodicalId":45000,"journal":{"name":"Sigma Journal of Engineering and Natural Sciences-Sigma Muhendislik ve Fen Bilimleri Dergisi","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136368245","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 : 2023-01-01DOI: 10.14744/sigma.2023.00099
Fatma İrem ŞAHİN
Today, the transformation of polymers into useful structures for the human body in medical field has been an interesting subject that affected everyone. Synthetic polymers have a wide range of uses in the health sector such as coating, cardiovascular, orthodontic surgery, tissue engineering, implant, and drug carrier with the development of technology. These polymers are known as polymers with various characteristics and applications artificially synthesized in accordance with chemical and thermodynamic laws. The polymers in health sector have a share of 41% in drug and release studies, 18% in treatment with therapy applications, 10% in vaccine production, 31% in studies on new approaches in this field. Synthetic polymers have ability to be produced cheaply and easily in large quantities. In this study, synthetic polymers such as polyethylene glycol, polyvinyl alcohol, polyurethane, polyolefin, polytetrafluoroethylene, silicone, polyvinyl chloride, poly-methyl methacrylate, polyester, polyamide and poly-lactic acid were investigated and details regarding the applications with explications of polymers were provided. It was seen that synthetic polymers could be evaluated in treatment of cancer and chronic diseases by determining the most appropriate methods and techniques with biocompatible
{"title":"Evaluation of properties for synthetic polymers in medicine","authors":"Fatma İrem ŞAHİN","doi":"10.14744/sigma.2023.00099","DOIUrl":"https://doi.org/10.14744/sigma.2023.00099","url":null,"abstract":"Today, the transformation of polymers into useful structures for the human body in medical field has been an interesting subject that affected everyone. Synthetic polymers have a wide range of uses in the health sector such as coating, cardiovascular, orthodontic surgery, tissue engineering, implant, and drug carrier with the development of technology. These polymers are known as polymers with various characteristics and applications artificially synthesized in accordance with chemical and thermodynamic laws. The polymers in health sector have a share of 41% in drug and release studies, 18% in treatment with therapy applications, 10% in vaccine production, 31% in studies on new approaches in this field. Synthetic polymers have ability to be produced cheaply and easily in large quantities. In this study, synthetic polymers such as polyethylene glycol, polyvinyl alcohol, polyurethane, polyolefin, polytetrafluoroethylene, silicone, polyvinyl chloride, poly-methyl methacrylate, polyester, polyamide and poly-lactic acid were investigated and details regarding the applications with explications of polymers were provided. It was seen that synthetic polymers could be evaluated in treatment of cancer and chronic diseases by determining the most appropriate methods and techniques with biocompatible","PeriodicalId":45000,"journal":{"name":"Sigma Journal of Engineering and Natural Sciences-Sigma Muhendislik ve Fen Bilimleri Dergisi","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135908939","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 : 2023-01-01DOI: 10.14744/sigma.2023.00113
Aylin ADEM
In facility layout problems, ergonomic issues are generally not considered in the first place; instead, traditional layout aspects are taken into account. However, with the developing technology, legal responsibilities, and awareness of both the public and private sector to ergonomic issues, ergonomic concerns in designing any production area are getting more attention. The aim of this paper is to find an optimal single row facility layout arrangement taking into account both ergonomic and traditional layout aspects. The considered ergonomic feature is the noise exposure. If one worker exposures continuous high level of noise, temporary or permanent hearing loss may occur, which is not desired in the working life. To show the effect of noise exposure on layout, a mathematical model with noise constraint was developed. Moreover, a goal programming model which takes noise exposure, closeness ratings and material flow aspects as objectives was proposed. Traditional Analytical Hierarchy Process was utilized to gain the weights of the objectives. The applicability of the model was demonstrated by the solution of a hypothetical problem. The proposed models were tested and validated on different conditions to find out the effect of noise exposure. Cite this article as: Adem A, Durmaz ED, Şahin R, Dağdeviren M. A goal programming approach for the facility layout problem with ergonomic constraint. Sigma J Eng Nat Sci 2023;41(5):947−957.
{"title":"A goal programming approach for the facility layout problem with ergonomic constraint","authors":"Aylin ADEM","doi":"10.14744/sigma.2023.00113","DOIUrl":"https://doi.org/10.14744/sigma.2023.00113","url":null,"abstract":"In facility layout problems, ergonomic issues are generally not considered in the first place; instead, traditional layout aspects are taken into account. However, with the developing technology, legal responsibilities, and awareness of both the public and private sector to ergonomic issues, ergonomic concerns in designing any production area are getting more attention. The aim of this paper is to find an optimal single row facility layout arrangement taking into account both ergonomic and traditional layout aspects. The considered ergonomic feature is the noise exposure. If one worker exposures continuous high level of noise, temporary or permanent hearing loss may occur, which is not desired in the working life. To show the effect of noise exposure on layout, a mathematical model with noise constraint was developed. Moreover, a goal programming model which takes noise exposure, closeness ratings and material flow aspects as objectives was proposed. Traditional Analytical Hierarchy Process was utilized to gain the weights of the objectives. The applicability of the model was demonstrated by the solution of a hypothetical problem. The proposed models were tested and validated on different conditions to find out the effect of noise exposure. Cite this article as: Adem A, Durmaz ED, Şahin R, Dağdeviren M. A goal programming approach for the facility layout problem with ergonomic constraint. Sigma J Eng Nat Sci 2023;41(5):947−957.","PeriodicalId":45000,"journal":{"name":"Sigma Journal of Engineering and Natural Sciences-Sigma Muhendislik ve Fen Bilimleri Dergisi","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135210845","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 : 2023-01-01DOI: 10.14744/sigma.2023.00101
Mert KAYA
This present study aims to contribute to the literature in understanding the roles of roller burnishing parameters and conditions on Inconel 718 alloy fabricated by Laser Powder Bed Fusion (LPBF). The roller burnishing process was performed with three burnishing forces (300 N, 600 N, 900 N) and under three cooling conditions (namely cryogenic, dry, and preheat). The effects on surface integrity characteristics including surface roughness, microstructure, microhardness, and XRD were investigated. The results illustrate that the burnishing force remarkably influences the decrease the surface roughness under all burnishing conditions. It was possible to reduce the surface roughness from 23 (cid:0)m to 0.794 (cid:0)m after turning applied to the as-built part followed by roller burnishing with 900N under dry conditions. When the microstructures were examined, the roller burnishing process caused plastic deformations and reductions in grain sizes. It was observed that the affected layer depth could reach 4.3 (cid:0)m with 900N under preheat conditions. With the roller burnishing process, it was possible to increase the surface microhardness by 21% depending on the parameter and condition. The roller burnishing process had notable effects on XRD patterns of Inconel 718 alloy fabricated by LPBF.
{"title":"Influence of burnishing process on surface integrity of inconel 718 fabricated by laser powder bed fusion additive manufacturing","authors":"Mert KAYA","doi":"10.14744/sigma.2023.00101","DOIUrl":"https://doi.org/10.14744/sigma.2023.00101","url":null,"abstract":"This present study aims to contribute to the literature in understanding the roles of roller burnishing parameters and conditions on Inconel 718 alloy fabricated by Laser Powder Bed Fusion (LPBF). The roller burnishing process was performed with three burnishing forces (300 N, 600 N, 900 N) and under three cooling conditions (namely cryogenic, dry, and preheat). The effects on surface integrity characteristics including surface roughness, microstructure, microhardness, and XRD were investigated. The results illustrate that the burnishing force remarkably influences the decrease the surface roughness under all burnishing conditions. It was possible to reduce the surface roughness from 23 (cid:0)m to 0.794 (cid:0)m after turning applied to the as-built part followed by roller burnishing with 900N under dry conditions. When the microstructures were examined, the roller burnishing process caused plastic deformations and reductions in grain sizes. It was observed that the affected layer depth could reach 4.3 (cid:0)m with 900N under preheat conditions. With the roller burnishing process, it was possible to increase the surface microhardness by 21% depending on the parameter and condition. The roller burnishing process had notable effects on XRD patterns of Inconel 718 alloy fabricated by LPBF.","PeriodicalId":45000,"journal":{"name":"Sigma Journal of Engineering and Natural Sciences-Sigma Muhendislik ve Fen Bilimleri Dergisi","volume":"45-46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136366313","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 : 2023-01-01DOI: 10.14744/sigma.2023.00109
Büşra YUSUFOĞLU
In this study, reversed-phase HPLC procedure was conducted for the synchronized amount of water-soluble such vitamins as thiamine (B₁), riboflavin (B₂), niacin (B₃) pyridoxine (B₆), and co-balamin (B 12 ) in four Meat Based Ethnic Foods (MBEF) of Turkey. In this paper, we investigated MBEF Kelle-Paça, Arnavut Ciğeri, Erzurum Cağ Kebabı, Keşkek respectively. In this paper, rapid and a simple method was constructed for the determination of some water-soluble vitamins (B₁, B₂, B₃, B₆, B 12 ), by High-performance liquid chromatography. The B₁, B₂, B₃, B 6 , and B 12 content was determined high in Arnavut Ciğeri 498.68 µg /portion, 2.9857 µg/portion, 24.607 µg/portion, 2.2149 µg/ portion, 178.36 µg/portion respectively a significant amount B₆ ingredient in Erzurum Cağ Kebab 1.5320 µg/portion. The results of investigation showed that among these meat based ethnic foods are rich sources of vitamins Arnavut Ciğeri. In the food sector, the successful implementation of a simple, low-cost, and time-efficient approach is used to determine these vitamins. We have indicated our meat based ethnic foods are healthy and available. And also, the most commonly used method in the determination of vitamins of the B-groups is RP-HPLC is most suitable procedure. The procedures validation indicated that it is extremely sensitive, selective, and linear.
{"title":"The best journey in Turkish cuisine: Some Meat-based ethnic foods types and investigation of some water-soluble vitamins compositions by HPLC procedure","authors":"Büşra YUSUFOĞLU","doi":"10.14744/sigma.2023.00109","DOIUrl":"https://doi.org/10.14744/sigma.2023.00109","url":null,"abstract":"In this study, reversed-phase HPLC procedure was conducted for the synchronized amount of water-soluble such vitamins as thiamine (B₁), riboflavin (B₂), niacin (B₃) pyridoxine (B₆), and co-balamin (B 12 ) in four Meat Based Ethnic Foods (MBEF) of Turkey. In this paper, we investigated MBEF Kelle-Paça, Arnavut Ciğeri, Erzurum Cağ Kebabı, Keşkek respectively. In this paper, rapid and a simple method was constructed for the determination of some water-soluble vitamins (B₁, B₂, B₃, B₆, B 12 ), by High-performance liquid chromatography. The B₁, B₂, B₃, B 6 , and B 12 content was determined high in Arnavut Ciğeri 498.68 µg /portion, 2.9857 µg/portion, 24.607 µg/portion, 2.2149 µg/ portion, 178.36 µg/portion respectively a significant amount B₆ ingredient in Erzurum Cağ Kebab 1.5320 µg/portion. The results of investigation showed that among these meat based ethnic foods are rich sources of vitamins Arnavut Ciğeri. In the food sector, the successful implementation of a simple, low-cost, and time-efficient approach is used to determine these vitamins. We have indicated our meat based ethnic foods are healthy and available. And also, the most commonly used method in the determination of vitamins of the B-groups is RP-HPLC is most suitable procedure. The procedures validation indicated that it is extremely sensitive, selective, and linear.","PeriodicalId":45000,"journal":{"name":"Sigma Journal of Engineering and Natural Sciences-Sigma Muhendislik ve Fen Bilimleri Dergisi","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135156185","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 : 2023-01-01DOI: 10.14744/sigma.2023.00106
Abdulkadir GOZUOGLU
In recent years, Internet of Things (IoT) applications have become across-the-board and are used by most smart device users. Wired Communication, Bluetooth, radio frequency (RF), RS485/Modbus, and zonal intercommunication global standard (ZigBee) can be used as IoT communication methods. The low delay times and ability to control homes from outside the building via the Internet are the main reasons wireless fidelity (Wi-Fi) communication is preferred. Commercially produced devices generally use their unique interfaces. The devices do not allow integration to form an intelligent home automation and demand-side energy management system. In addition, the high cost of most commercial products creates barriers for users. In this study, a local home automation server (LHAS) was created subject to low cost. Smart devices connected to the server through a Wi-Fi network were designed and implemented. The primary purpose of the design is to create an IoT network to form an LHAS. The IoT network will learn the energy consumption behavior of users for future Smart Grids. The designed intelligent devices can provide all the necessary measurements and control of houses. The open-source software Home Assistant (Hassio) was used to create the LHAS. Espressif systems (ESP) series microcontrollers (µCs) were chosen to design intelligent devices. ESP-01, NodeMCU, and ESP-32, the most widely used ESP models, were preferred. A convolutional neural network (CNN)/long short-term memory (LSTM) neural network was designed, and analysis was performed to learn the consumption behavior of residential users.
{"title":"Modeling and implementation of demand-side energy management system","authors":"Abdulkadir GOZUOGLU","doi":"10.14744/sigma.2023.00106","DOIUrl":"https://doi.org/10.14744/sigma.2023.00106","url":null,"abstract":"In recent years, Internet of Things (IoT) applications have become across-the-board and are used by most smart device users. Wired Communication, Bluetooth, radio frequency (RF), RS485/Modbus, and zonal intercommunication global standard (ZigBee) can be used as IoT communication methods. The low delay times and ability to control homes from outside the building via the Internet are the main reasons wireless fidelity (Wi-Fi) communication is preferred. Commercially produced devices generally use their unique interfaces. The devices do not allow integration to form an intelligent home automation and demand-side energy management system. In addition, the high cost of most commercial products creates barriers for users. In this study, a local home automation server (LHAS) was created subject to low cost. Smart devices connected to the server through a Wi-Fi network were designed and implemented. The primary purpose of the design is to create an IoT network to form an LHAS. The IoT network will learn the energy consumption behavior of users for future Smart Grids. The designed intelligent devices can provide all the necessary measurements and control of houses. The open-source software Home Assistant (Hassio) was used to create the LHAS. Espressif systems (ESP) series microcontrollers (µCs) were chosen to design intelligent devices. ESP-01, NodeMCU, and ESP-32, the most widely used ESP models, were preferred. A convolutional neural network (CNN)/long short-term memory (LSTM) neural network was designed, and analysis was performed to learn the consumption behavior of residential users.","PeriodicalId":45000,"journal":{"name":"Sigma Journal of Engineering and Natural Sciences-Sigma Muhendislik ve Fen Bilimleri Dergisi","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135156379","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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