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Investigation Of Mycotoxins In Packed Gluten Free Foods 包装无麸质食品中真菌毒素的调查
Kocaeli Journal of Science and Engineering Pub Date : 2023-05-04 DOI: 10.34088/kojose.1251113
Zeynep DEĞİRMEN, Seda KARAYÜNLÜ BOZBAŞ
{"title":"Investigation Of Mycotoxins In Packed Gluten Free Foods","authors":"Zeynep DEĞİRMEN, Seda KARAYÜNLÜ BOZBAŞ","doi":"10.34088/kojose.1251113","DOIUrl":"https://doi.org/10.34088/kojose.1251113","url":null,"abstract":"The number of people with celiac and gluten intolerance is increasing day by day. This increases the variety, number and consumption of gluten-free products. However, this study was the first in our country to determine whether the packaged gluten-free products contain mycotoxins. Aflatoxin (AF), ochratoxin (OTA), zearalenone (ZON), and deoxynivalenol (DON) was analysed in 95 imported and domestic gluten-free packaged foods of different types and brands. Analyses were made with HPLC with fluorescent detector, and HPLC with diode array detector. In addition, validation studies were completed with the addition of blank samples. OTA analysis revealed toxins in buckwheat flour, pasta, cracker/biscuit, corn flour, but these values were found to be appropriate according to Turkish Food Codex (TFC). DON was found to be suitable for TFC in 7 types of pasta, 1 bread and 3 crackers/biscuits.","PeriodicalId":317301,"journal":{"name":"Kocaeli Journal of Science and Engineering","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135011474","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}
引用次数: 0
Transcutaneous Nerve Stimulation Current Thresholds Based on Nerve Bending Angle and Nerve Termination Point 基于神经弯曲角度和神经终止点的经皮神经刺激电流阈值
Kocaeli Journal of Science and Engineering Pub Date : 2023-05-04 DOI: 10.34088/kojose.1233583
Enver SALKIM
{"title":"Transcutaneous Nerve Stimulation Current Thresholds Based on Nerve Bending Angle and Nerve Termination Point","authors":"Enver SALKIM","doi":"10.34088/kojose.1233583","DOIUrl":"https://doi.org/10.34088/kojose.1233583","url":null,"abstract":"There is increasing interest in using transcutaneous electrical stimulation to treat or suppress brain-related disorders. Primary headache disorder is a socioeconomic burden, whose pharmaceutical and invasive treatment methods may have troublesome side effects. There are various transcutaneous electrical nerve stimulation neuromodulation systems that are used for health-related disorders. There are many factors that may affect these systems’ efficiency including stimulus current levels. A device for primary headaches showed mixed results. This may be related to the higher stimulus current levels that are applied through the electrodes. A feasible solution to reduce the required current levels is considering the geometrical features of the target nerve bending and nerve termination trajectories. In this study, the impact of the geometrical features of the nerve, such as nerve bending and nerve termination, on the stimulus current thresholds were analyzed based on FEM hybrid models. Twenty nerve models were generated considering statistical variations to assess the effect of the nerve geometrical features on the target neuromodulatory system. Finally, the safety parameters were calculated based on the target neuromodulator settings. The results showed that the geometric features of the target nerve have a significant effect on the required stimulus current thresholds. These results may provide important guidance mainly for transcutaneous frontal nerve stimulation and future electrical nerve stimulation design.","PeriodicalId":317301,"journal":{"name":"Kocaeli Journal of Science and Engineering","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135011614","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}
引用次数: 0
First-Principles Study of Titanium and Lithium Adsorption on Perfect and Defective Hexagonal Boron Nitride Monolayer Under Effects of Charging 充电作用下完美和缺陷六方氮化硼单层吸附钛和锂的第一性原理研究
Kocaeli Journal of Science and Engineering Pub Date : 2023-04-25 DOI: 10.34088/kojose.1252944
Bahadır SALMANKURT
{"title":"First-Principles Study of Titanium and Lithium Adsorption on Perfect and Defective Hexagonal Boron Nitride Monolayer Under Effects of Charging","authors":"Bahadır SALMANKURT","doi":"10.34088/kojose.1252944","DOIUrl":"https://doi.org/10.34088/kojose.1252944","url":null,"abstract":"Single Titanium (Ti) and Lithium (Li) atoms adsorbtion on Pristine and defective hexagonal boron nitride (P-h-BN and BV-h-BN) monolayer were employed using Density Functional Theory (DFT) under effect of charging. Obtained data reveal that Li adsorbtion on P-h-BN is weak, while Ti adsorbtion on P-h-BN is strong. When Ti and Li atoms interact with P-h-BN surface, Ti and Li generate 4 µB/cell and 1 µB/cell magnetic moments, respectively. The extraction of an electron from the systems leads to a considerable rise in the adsorption energy, notably in the case of Li-P-h-BN. There is a notable decrease in the band gap of Ti-P-h-BN in both the charged states, especially in the electron-added state. Removing an electron from the Li-P-h-BN system results in a non-magnetic state and a significant increase of the band gap to 4.07 eV. Ti-BV-h-BN system shows significantly stronger adsorption energy due to d-orbitals of Ti atom. When an electron is added to the systems, the interaction energy between Ti and BV-h-BN decreases, while the interaction energy between Li and BV-h-BN increases. Moreover, removing an electron from Ti-BN-h-BN results in an increase in the band gap to 2.29 eV and disappearance of magnetic moment.","PeriodicalId":317301,"journal":{"name":"Kocaeli Journal of Science and Engineering","volume":"10 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":"135222559","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}
引用次数: 0
Effect of Using Recycled Colemanite Waste and Cathode Ray Tube Glass in the Cement Mortar on Physical and Mechanical Properties 再生煤矸石和阴极射线管玻璃对水泥砂浆物理力学性能的影响
Kocaeli Journal of Science and Engineering Pub Date : 2023-04-11 DOI: 10.34088/kojose.1103855
Salih Taner YILDIRIM, Arif YILMAZOĞLU
{"title":"Effect of Using Recycled Colemanite Waste and Cathode Ray Tube Glass in the Cement Mortar on Physical and Mechanical Properties","authors":"Salih Taner YILDIRIM, Arif YILMAZOĞLU","doi":"10.34088/kojose.1103855","DOIUrl":"https://doi.org/10.34088/kojose.1103855","url":null,"abstract":"In this study, the performance of colemanite, which is a valuable boron waste, and recycled cathode ray tube glass (CRT) in cement mortar was examined by experimental methods. Colemanite waste (CW) and CRT were replaced with cement and aggregate and used as mineral additives, and their effect on the physical and mechanical properties of mortar was investigated. In addition to control sample which was not contain CW or CRT, 7 more samples were used and, in these samples, cement was used at a rate of 2.5% along with CW, the aggregate was replaced with CRT at the rates of 10%, 20% and 30%, and with the combination of CW and CRT. The consistency, unit weight, water absorption, compression strength, flexural strength and abrasion resistance properties of the mortars were compared. As a result of this study, it has been observed that the use of waste materials can make positive contributions to some of the physical and mechanical properties of the mortar. Thus, the goal of both improving the properties of the mortar and making it affordable through the use of waste materials was achieved.","PeriodicalId":317301,"journal":{"name":"Kocaeli Journal of Science and Engineering","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135479531","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}
引用次数: 0
Evaluation of Noise Levels in Flour Factories in Terms of Occupational Health and Safety 从职业健康与安全角度评价面粉厂噪声水平
Kocaeli Journal of Science and Engineering Pub Date : 2023-03-06 DOI: 10.34088/kojose.1201903
Sirer ALBAYRAK, Mustafa ÖZDEMİR, Melike YAĞCI
{"title":"Evaluation of Noise Levels in Flour Factories in Terms of Occupational Health and Safety","authors":"Sirer ALBAYRAK, Mustafa ÖZDEMİR, Melike YAĞCI","doi":"10.34088/kojose.1201903","DOIUrl":"https://doi.org/10.34088/kojose.1201903","url":null,"abstract":"According to the Ministery of Labor and Social Security; 10% of occupational diseases are defined as noise-induced hearing loss. Flour factories are workplaces where physical risk factors such as noise are experienced due to their processes. Necessary measures should be taken to reduce or eliminate negative consequences for human health. Noise exposure of workers in two flour mills to be measured in pneumatic, sieve, purifier and roller units selected for this purpose. These measurement studies carried out according to the TS EN ISO 9612 standard; task-based metrics. As a result of these measurements, the daily noise exposure value in all units where measurements were made was above the exposure limit value in the legal legislation. These results showed that noise exposure poses a risk for the workers in the selected flour- mills and precautions should be taken for these workers.","PeriodicalId":317301,"journal":{"name":"Kocaeli Journal of Science and Engineering","volume":"174 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135080735","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}
引用次数: 0
Detection of Fault from Acoustic Signals in Automobile Engines using Deep Learning Techniques 基于深度学习技术的汽车发动机声信号故障检测
Kocaeli Journal of Science and Engineering Pub Date : 2023-02-28 DOI: 10.34088/kojose.1225591
Fatih Alperen ERDOĞAN, Ayhan KÜÇÜKMANİSA, Zeynep Hilal KİLİMCİ
{"title":"Detection of Fault from Acoustic Signals in Automobile Engines using Deep Learning Techniques","authors":"Fatih Alperen ERDOĞAN, Ayhan KÜÇÜKMANİSA, Zeynep Hilal KİLİMCİ","doi":"10.34088/kojose.1225591","DOIUrl":"https://doi.org/10.34088/kojose.1225591","url":null,"abstract":"Detecting faults in automobile engines from sound signal is a challenging task at the production phase of automobiles. That is why it attracts engineers and researchers to handle this issue thereby applying various solutions. In this work, we propose deep learning-based fault detection mechanism in automobile engines from different sound resources. In the dataset collection phase, various vehicle breakdown sounds are gathered from social media environments by constructing our own customized crawler. Moreover, noise addition is applied to increase the amount of data. Subsequently, raw audio files are processed at the feature exraction step employing mel-frequency cepstral coefficients. To detect the vehicle breakdown sounds, 1-D and 2-D convolutional neural networks, long short-term memory networks, artificial neural networks, and support vector machine are modeled. Experiment results show that the usage of 1-D convolutional neural network is transcendent with 99% of accuracy compared to the other techniques, especially, state-of-the-art studies are considered.","PeriodicalId":317301,"journal":{"name":"Kocaeli Journal of Science and Engineering","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135827269","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}
引用次数: 0
Ensemble Learning Approach to Chatbot Design Based on Paraphrase Detection 基于释义检测的聊天机器人集成学习设计方法
Kocaeli Journal of Science and Engineering Pub Date : 2023-02-09 DOI: 10.34088/kojose.1198245
Himmet Toprak KESGİN, Onur ÖZTUNÇ, Banu DİRİ
{"title":"Ensemble Learning Approach to Chatbot Design Based on Paraphrase Detection","authors":"Himmet Toprak KESGİN, Onur ÖZTUNÇ, Banu DİRİ","doi":"10.34088/kojose.1198245","DOIUrl":"https://doi.org/10.34088/kojose.1198245","url":null,"abstract":"Many companies are setting up call centers to ensure the satisfaction of their customers. The call centers are mainly used by the customers to collect information about their products or services. However, it is quite costly to provide 24-hours service. Therefore, companies aim to develop a chatbot to reduce the need for the call center. In this paper, we propose a ensemble chatbot design based on paraphrase detection. Our algorithm and does not require a large number of instances or labels and it can work on small data sets, for example an existing FAQ. Chatbots perform best when they are domain specific. We used publicly available data from the websites of major telecommunication companies. We propose an ensemble chatbot design based on paraphrase detection. The ensemble model improves the success by 10 % compared to the single best model. Our proposed ensemble chatbot design has 84.54 % top-3 and 70.10 % top-1 accuracy.","PeriodicalId":317301,"journal":{"name":"Kocaeli Journal of Science and Engineering","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136175397","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}
引用次数: 0
Optimization of Traffic Network Signal Durations with Heuristic Algorithm and the Effect of Number of Individuals 基于启发式算法的交通网络信号持续时间优化及个体数影响
Kocaeli Journal of Science and Engineering Pub Date : 2022-12-27 DOI: 10.34088/kojose.1159113
C. Karakuzu, Emin Topal
{"title":"Optimization of Traffic Network Signal Durations with Heuristic Algorithm and the Effect of Number of Individuals","authors":"C. Karakuzu, Emin Topal","doi":"10.34088/kojose.1159113","DOIUrl":"https://doi.org/10.34088/kojose.1159113","url":null,"abstract":"In the traffic network that we frequently use in our daily life, the primary demand of people has been to reduce the time they spend in traffic and to travel to the points they want to reach as quickly as possible. Developing countries want to meet this demand with the least cost in order to meet this demand. In this study, it is aimed to manage the traffic network with the best times by optimizing the traffic signal durations in order to minimize the travel time for a road network chosen as a benchmark. For the optimization process, it is aimed to run a population-based heuristic algorithm with different numbers of individuals and to obtain the best travel time. With the help of an open source code traffic simulation program, which was run by modeling the benchmark road network, the obtained traffic data was also visually analyzed and compared. The effects of the heuristic algorithms applied with different numbers of individuals on the travel times according to the starting-destination points were examined before and after the optimization. As a result of the study, it has been observed that travel times and traffic signal times can be reduced with heuristic algorithms. Based on both numerical metrics and visual results, it has been determined that optimized traffic light durations give better results than non-optimized ones.","PeriodicalId":317301,"journal":{"name":"Kocaeli Journal of Science and Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130502329","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}
引用次数: 0
Chemical characterization of ultra high molecular weight polyethylene based tibial inserts after ethylene oxide sterilization 环氧乙烷灭菌后超高分子量聚乙烯基胫骨植入物的化学特性
Kocaeli Journal of Science and Engineering Pub Date : 2022-12-20 DOI: 10.34088/kojose.1179821
O. Bozkaya
{"title":"Chemical characterization of ultra high molecular weight polyethylene based tibial inserts after ethylene oxide sterilization","authors":"O. Bozkaya","doi":"10.34088/kojose.1179821","DOIUrl":"https://doi.org/10.34088/kojose.1179821","url":null,"abstract":"Ultra high molecular weight polyethylene (UHMWPE) has become the gold standard for total joint replacements such as tibial inserts because of its chemical inertness, superior mechanical properties, and biocompatibility. Ethylene oxide sterilization is one of the most common and effective methods used, especially for sterilization of polyethylene based polymeric implants. However, variable sterilization conditions can cause a change in the chemical structure of the polymeric material, which affects its mechanical properties and lifetime. The aim of this study is to investigate whether the chemical structure of UHMWPE tibial inserts sterilized with ethylene oxide undergoing certain conditions remains the same. Chemical characterization studies were performed with Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffractometer, differential scanning calorimetry, thermogravimetric analysis, mass spectrometry and elemental analysis techniques recommended for polymeric materials in ISO 10993-8:2020 standard. Characterization results revealed that there was no significant change in molecular structure, crystallinity, elemental composition of UHMWPE materials after ethylene oxide sterilization. These results can provide assurance that tibial inserts keep their physical, chemical, and mechanical properties after sterilization.","PeriodicalId":317301,"journal":{"name":"Kocaeli Journal of Science and Engineering","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114055404","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}
引用次数: 1
Undetermined Coefficients Method for Sequential Fractional Differential Equations 序列分数阶微分方程的待定系数法
Kocaeli Journal of Science and Engineering Pub Date : 2022-12-14 DOI: 10.34088/kojose.1145611
S. Erman
{"title":"Undetermined Coefficients Method for Sequential Fractional Differential Equations","authors":"S. Erman","doi":"10.34088/kojose.1145611","DOIUrl":"https://doi.org/10.34088/kojose.1145611","url":null,"abstract":"Undetermined coefficients method is presented for nonhomogeneous sequential fractional differential equations involving Caputo fractional derivative of order nalpha where n-1 nalphale n and ninmathbb{N}. By employing presented method, a particular solution of the considered equation is obtained. Some details about the estimation of the particular solution required to apply this method are explained. It is shown that this method is particularly effective for nonhomegenous fractional differential equations when the fractional differential equations involve some specific right-hand side functions.","PeriodicalId":317301,"journal":{"name":"Kocaeli Journal of Science and Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122074387","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}
引用次数: 0
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