gazi university journal of science最新文献_第2页

New Steady State Current Error Limiters for PMSM Drives 用于 PMSM 驱动器的新型稳态电流误差限制器

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gazi university journal of science Pub Date : 2023-10-04 DOI: 10.35378/gujs.1253423

Hemantha Kumar Ravi, Lenın N C

引用次数: 0

Shallow Convolutional Neural Network for Gender Classification Based on Hand 基于手的浅卷积神经网络性别分类

gazi university journal of science Pub Date : 2023-09-25 DOI: 10.35378/gujs.1246486

Md. KHALİLUZZAMAN

引用次数: 0

Characterizations of Filter Convergent in Terms of Ideal 滤波器在理想条件下收敛的特性

gazi university journal of science Pub Date : 2023-09-24 DOI: 10.35378/gujs.967261

Shyamapada MODAK, Kulchhum KHATUN, Jiarul HOQUE

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Development of a Controlled Released System Based on IPN Types Hydrogel for Cartilage Repair 基于IPN型水凝胶的软骨修复控制释放系统的研制

gazi university journal of science Pub Date : 2023-09-08 DOI: 10.35378/gujs.1295326

Evrim SEVER, Mehlika PULAT

{"title":"Development of a Controlled Released System Based on IPN Types Hydrogel for Cartilage Repair","authors":"Evrim SEVER, Mehlika PULAT","doi":"10.35378/gujs.1295326","DOIUrl":"https://doi.org/10.35378/gujs.1295326","url":null,"abstract":"The aim of this study is to develop a controlled Fluconazole and Naproxen releasing system for cartilage repair. A series of interpenetrating polymer network (IPN) type of hydrogels were prepared by using 2-Hydroxyethyl methacrylate (HEMA) and gelatin in different ratios. The hydrogels were synthesized by using ammonium persulfate (APS) and sodium metabisulfite (SBS) as initiator pair and ethylene glycol dimethacrylate (EGDMA) and glutaraldehyde (GA) as cross linkers. The prepared hydrogels were characterized via hydrogel formation and swelling/degradation measurements, Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscope (SEM) analysis. From swelling tests, it is observed that semi-IPN hydrogels swell much more than full-IPNs which crosslinked by two agents, EGDMA and GA. The higher ratios of HEMA/gelatin negatively affect swelling values. In general, the IPN hydrogel discs were not affected by the variation of temperature. The release studies of Fluconazole and Naproxen were performed at 37 ⁰C and it is found that the swelling and release profiles were similar to each other. The releases of drugs increase rapidly at first and then complies nearly 36 h-48 h. Because of the looser and porous structure, semi-IPN hydrogels have higher release values than full-IPNs.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136364205","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

ANN Identification technique and fuzzy PI Control of a Hybrid Indirect Matrix Converter with a Flying Capacitor three level Inverter in Power Active Filtering Application 混合间接矩阵变换器与飞电容三电平逆变器在电力有源滤波中的应用

gazi university journal of science Pub Date : 2023-09-01 DOI: 10.35378/gujs.1001559

Taki Eddine AMEUR, Aissa AMEUR, Benalia ATALLAH

引用次数: 0

Circular Supply Chain Network Design for E-Commerce 面向电子商务的循环供应链网络设计

gazi university journal of science Pub Date : 2023-09-01 DOI: 10.35378/gujs.1234548

Batuhan KOCAOĞLU, Meliha BULUT

引用次数: 0

An Empirical Evaluation of Feature Selection Stability and Classification Accuracy 特征选择稳定性和分类准确性的经验评估

IF 0.9

gazi university journal of science Pub Date : 2023-08-28 DOI: 10.35378/gujs.998964

Mustafa Büyükkeçeci̇, M. C. Okur

{"title":"An Empirical Evaluation of Feature Selection Stability and Classification Accuracy","authors":"Mustafa Büyükkeçeci̇, M. C. Okur","doi":"10.35378/gujs.998964","DOIUrl":"https://doi.org/10.35378/gujs.998964","url":null,"abstract":"The performance of inductive learners can be negatively affected by high-dimensional datasets. To address this issue, feature selection methods are used. Selecting relevant features and reducing data dimensions is essential for having accurate machine learning models. Stability is an important criterion in feature selection. Stable feature selection algorithms maintain their feature preferences even when small variations exist in the training set. Studies have emphasized the importance of stable feature selection, particularly in cases where the number of samples is small and the dimensionality is high. In this study, we evaluated the relationship between stability measures, as well as, feature selection stability and classification accuracy, using the Pearson Product-Moment Correlation Coefficient. We conducted an extensive series of experiments using five filter and two wrapper feature selection methods, three classifiers for subset and classification performance evaluation, and eight real-world datasets taken from two different data repositories. We measured the stability of feature selection methods using a total of twelve stability metrics. Based on the results of correlation analyses, we have found that there is a lack of substantial evidence supporting a linear relationship between feature selection stability and classification accuracy. However, a strong positive correlation has been observed among several stability metrics.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":"8 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139348703","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

Effects of Sub-acute Administration of Onion Waste Quercetin on the Hippocampus of Mice: A Histological Approach 亚急性给药洋葱废槲皮素对小鼠海马的组织学影响

gazi university journal of science Pub Date : 2023-08-26 DOI: 10.35378/gujs.1272285

Nathan DİBAL, Musa SAMAİLA CHİROMA, Martha ATTAH, Sunday MANYE

{"title":"Effects of Sub-acute Administration of Onion Waste Quercetin on the Hippocampus of Mice: A Histological Approach","authors":"Nathan DİBAL, Musa SAMAİLA CHİROMA, Martha ATTAH, Sunday MANYE","doi":"10.35378/gujs.1272285","DOIUrl":"https://doi.org/10.35378/gujs.1272285","url":null,"abstract":"Quercetin is a flavonoid with a great capability of crossing the blood-brain barrier. It is reported to exert numerous beneficial effects on both animal and human health. The study evaluates the effects of onion waste quercetin (OWQ) on the histology of the hippocampus and dentate gyrus of mice. Twenty mice were assigned into four groups (n=5). The groups were given distilled water, and OWQ at 95mg/kg, 190mg/kg, and 380mg/kg respectively for 28 days. The brain of each mouse was harvested afterward, weighed, and processed for light microscopy. The normal and degenerating cells in the dentate gyrus and hippocampus Cornu Ammonis (CA1 & CA3) were counted. The micrographs of the dentate gyrus showed normal molecular, granular, and polymorphic layers in the control mice, as well as the mice, treated with OWQ with few degenerating cells in the granular layer of OWQ-treated (190mg/kg) mice. The CA3 area of the hippocampus showed normal molecular and polymorphic layers in OWQ-treated mice. However, the granular layer of the mice that received OWQ at 190mg/kg showed numerous degenerating cells. OWQ especially at 95mg/kg was found to significantly increase the number of normal cells in the dentate gyrus and hippocampus (CA1 & CA3) of the brain compared to the control at P< .05. It also significantly decreased degenerating cells compared to the control (P< .05). In conclusion, onion waste quercetin, especially at 95mg/kg was found to maintain the pool of normal cells within the dentate gyrus and hippocampus of mice brain.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135236328","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

Integration of Daylight Use and Analysis in Double Skin Facades: A Literature Review 双层幕墙的日光利用与分析一体化：文献综述

IF 0.9

gazi university journal of science Pub Date : 2023-08-04 DOI: 10.35378/gujs.1243933

Mustafa Serhan Ünlütürk, Tuğçe Kazanasmaz

{"title":"Integration of Daylight Use and Analysis in Double Skin Facades: A Literature Review","authors":"Mustafa Serhan Ünlütürk, Tuğçe Kazanasmaz","doi":"10.35378/gujs.1243933","DOIUrl":"https://doi.org/10.35378/gujs.1243933","url":null,"abstract":"Double skin facades (DSF) aim to save energy reducing the heat losses in buildings. They are visually appeal while allowing to use daylight efficiently. Such facade systems can reduce glare and distribute daylight evenly in the interior when compared to conventional facade systems. That is a result of cavities between two glass facades and locating sunshading elements in them, although this system provides a high level of transparency. As their primary purpose of application is to ensure thermal performance and ventilation, most studies in literature have focused on these. However, to construct and maintain a holistic point of view in building performance, researchers and professionals need to take into account the integration of daylight use and analysis in such facades. This study aims to analyse daylight performance implemented studies in relation to these systems and presents a comprehensive and recent review on integration of daylight use and analysis. Recent studies are shown in tabulated form and interpreted in detail with graphics. considering their methodologies, daylight parameters and findings. Results show that the daylight parameter is one of the most important issues that architects or designers should consider from the moment they start the design, and they should make their designs based on the optimum penetration of daylight into the building. This review can contribute to literature in calling attention to daylight studies in DSF. It provides feedback information on how recent researches and technological developments in DSF can let them benefit from daylight more efficiently. That makes more and further improvements in such facade system design. Thus, DSF helps to build an integrated building performance approach in achieving sustainability.","PeriodicalId":12615,"journal":{"name":"gazi university journal of science","volume":"5 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139351768","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

Head-to-Tail Cyclization of α-Conotoxin TxID Leads to Enhanced Stability in Serum α- concontoxin TxID的首尾环化导致血清稳定性增强

IF 0.9

gazi university journal of science Pub Date : 2023-07-25 DOI: 10.35378/gujs.1263833

Nurcan BİÇEN KARAKOÇ, Muharrem Akcan

引用次数: 0