Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering最新文献_第9页

APPLICATION OF RECUPERATOR FOR WASTE HEAT RECOVERY FROM EXHAUST FLUE GAS IN HOT WATER BOILER IN THE CENTRAL HEATING PLANT 蓄热器在集中供热热水锅炉烟气余热回收中的应用

Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering Pub Date : 2019-01-01 DOI: 10.18038/aubtda.411727

Gamze Karanfil, S. E. Ruşen, M. A. Topçu, Seyit Alperen Celtek, A. Rüşen

引用次数: 3

Characterization and Investigation of Biological Properties of Ag-Doped TiO2 Coatings Fabricated on Titanium 钛上制备的ag掺杂TiO2涂层的表征及生物性能研究

Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering Pub Date : 2019-01-01 DOI: 10.18038/AUBTDA.474928

Salih Durdu

{"title":"Characterization and Investigation of Biological Properties of Ag-Doped TiO2 Coatings Fabricated on Titanium","authors":"Salih Durdu","doi":"10.18038/AUBTDA.474928","DOIUrl":"https://doi.org/10.18038/AUBTDA.474928","url":null,"abstract":"In present study, Ag-doped TiO2 bioceramic coatings were fabricated on cp-Ti by plasma electrolytic oxidation (PEO) and physical vapor deposition (PVD). The phase composition, surface microstructure, elemental composition, surface topography, wettability and chemical state of the PEO and Ag-doped TiO2 surfaces were characterized by using powder- and thin film-X-ray diffraction (TF-XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), surface profilometer and contact angle measurement system (CAM), respectively. The PEO coating’ surface was porous and rough due to the nature of process. The Ti, anatase-TiO2, rutile-TiO2 and Ag2O phases were detected on the Ag-doped PEO surfaces by TF-XRD while The Ti, anatase and rutile phases were obtained on the PEO surfaces. The surface morphology structure of the PEO coating was not changed by PVD process. The Ti, O, P and Ag elements were observed on the Ag-doped PEO surfaces by EDS. Also, the amount of Ag existed on the surface was below cytotoxic limit. The Ag-doped PEO surfaces indicated better hydrophilic character to the PEO surface owing to increasing polarity of the surfaces. In vitro hydroxyapatite-forming ability was evaluated by immersion in simulated body fluid (SBF) at 36.5 °C for 28 days. The Ag-doped PEO surfaces showed good hydroxyapatite formation ability compared to the PEO surface. The antibacterial activity was evaluated by exposing the samples to Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) and they were compared by the reaction of the pathogens to Ag-doped PEO with the PEO controls. The antibacterial ability of the Ag-doped PEO surfaces was significantly improved respect to the PEO surfaces for S. aureus and E. coli.","PeriodicalId":7757,"journal":{"name":"Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83160431","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

Low frequency antiplane shear vibrations of a three-layered elastic plate 三层弹性板的低频反平面剪切振动

Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering Pub Date : 2018-12-31 DOI: 10.18038/AUBTDA.460365

B. Erbaş

引用次数: 4

Upconversion luminescence properties of Ga2O3: Yb3+, Er3+ nanoparticles: Effects of calcination temperature and dopant concentration Ga2O3: Yb3+， Er3+纳米颗粒的上转换发光性能:煅烧温度和掺杂浓度的影响

Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering Pub Date : 2018-12-31 DOI: 10.18038/AUBTDA.377127

A. Dulda

引用次数: 1

FINITE ELEMENT ANALYSIS OF NANOINDENTATION ON NANOLAMINATED MATERIALS 纳米层合材料纳米压痕的有限元分析

Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering Pub Date : 2018-12-31 DOI: 10.18038/aubtda.446535

S. Özerinç

{"title":"FINITE ELEMENT ANALYSIS OF NANOINDENTATION ON NANOLAMINATED MATERIALS","authors":"S. Özerinç","doi":"10.18038/aubtda.446535","DOIUrl":"https://doi.org/10.18038/aubtda.446535","url":null,"abstract":"Nanoindentation is a widely used tool for probing the mechanical properties of materials at the nanoscale. The analysis of the load-displacement curve obtained from nanoindentation provides the hardness and elastic modulus of the material. While hardness is a useful parameter for comparing different alloys and understanding tribological behavior, yield strength is a more useful parameter for alloy design and application in general. The yield strength of a nanoindentation-tested material can be estimated by combining the hardness result with the Tabor factor. This approach is well-established for homogeneous and isotropic materials; however, the application of the approach to recently developed laminated nanocomposites requires a better understanding of the plasticity under nanoindentation. Due to the complicated stress state and the nonhomogeneous geometry of the nanolaminated structure, there is a need to employ numerical methods for this analysis. In this study, the mechanical behavior of a model system of nanolaminated Cu-Nb under nanoindentation was investigated, through modeling the test using finite element method. The force-controlled simulation provided the load-displacement curve that would be obtained from an actual experiment, and Oliver-Pharr method was employed to obtain the hardness of the nanocomposite. The results show that the rule-of-mixture is a good approximation for estimating the nanoindentation hardness of the composites, if the mechanical properties of the constituents are known.","PeriodicalId":7757,"journal":{"name":"Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering","volume":"61 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86040812","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

ASSESSMENT OF RADIO SPECTRUM PROFILE IN NIGERIA USING MULTI-BAND AND MULTI-LOCATION RADIO SPECTRUM OCCUPANCY MEASUREMENTS 利用多频段和多位置无线电频谱占用测量评估尼日利亚的无线电频谱分布

Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering Pub Date : 2018-12-31 DOI: 10.18038/aubtda.425027

J. Popoola, Uche Otuu

引用次数: 1

Comparison of Provinces of Turkey In Terms of Accessing Health Care Services by Using Different Clustering Algorithms 土耳其各省在使用不同聚类算法获取医疗服务方面的比较

Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering Pub Date : 2018-12-31 DOI: 10.18038/AUBTDA.413890

H. Yildirim

{"title":"Comparison of Provinces of Turkey In Terms of Accessing Health Care Services by Using Different Clustering Algorithms","authors":"H. Yildirim","doi":"10.18038/AUBTDA.413890","DOIUrl":"https://doi.org/10.18038/AUBTDA.413890","url":null,"abstract":"Having access to health care services is the most primary of the basic human rights. It is vital that all citizens in a country are able to get these services equally and homogeneously. Despite its importance, providing health services vary from both country to country and between different provinces or states in country. Similarly, it may cause severe disparities and negative effects between individuals in the society. The primary concern of this study is to determine whether there is any difference between Turkey provinces in terms of accessing health care services, or not. Several clustering algorithms including hierarchical clustering, k-means and partitioning around medoids (pam) were applied to the data set including 31 health indicators of all provinces in Turkey. After comparing these algorithms via using some measures for determining the number of clusters and cluster validity, the findings showed that there were four distinct and significant clusters based on k-means clustering algorithm. It seemed that these clustering results were in a a close reciprocal relationship with the economic development and geographical location of provinces. Clustering results were evaluated and interpreted according to these two important findings.","PeriodicalId":7757,"journal":{"name":"Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering","volume":"80 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86894120","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

INVESTIGATION OF FOCUSED ION BEAM IMPLANTATION PROFILE OF Ga+ IONS FOR APPLICATIONS IN SILICON PHOTONICS 镓离子在硅光子学中的聚焦离子束注入研究

Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering Pub Date : 2018-12-31 DOI: 10.18038/AUBTDA.471568

F. Ay

引用次数: 0

XRD, OPTICAL AND VIBRATIONAL PROPERTIES OF ANNEALED CADMIUM SULFIDE FILMS 退火硫化镉薄膜的Xrd、光学和振动性能

Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering Pub Date : 2018-12-31 DOI: 10.18038/aubtda.425869

S. Aksay

{"title":"XRD, OPTICAL AND VIBRATIONAL PROPERTIES OF ANNEALED CADMIUM SULFIDE FILMS","authors":"S. Aksay","doi":"10.18038/aubtda.425869","DOIUrl":"https://doi.org/10.18038/aubtda.425869","url":null,"abstract":"Cadmium sulfide (CdS) films have been formed using an ultrasonic spray pyrolysis method. These films annealed at a temperature range of 200-500oC in air for 5 hours. The effects of annealing on the vibrational, structural, optical and morphological properties of cadmium sulfide films were looked at using X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, UV-visible spectroscopy(UV–vis) and atomic force microscopy (AFM). The X-ray diffraction data showed that the films had settled along (100) direction with a hexagonal wurtzite type structure. It was found that grain size goes up with an increase in the annealing temperature. The optical band gap numbers of the CdS film at different annealing temperatures were calculated and were found to be in the range of 2.40-2.44 eV. Raman results showed two rises attributed to the 1LO (300cm-1) and 2LO (601cm-1) modes of hexagonal CdS. The chemical bonding was studied by FTIR spectra. The saturation rises in the FTIR spectra of the films located at 550–715 and 844–1160 cm-1 can be given to the Cd–S and C–O phonon modes, respectively. The AFM of all the films were determined. These images colors changed with the annealing temperature.","PeriodicalId":7757,"journal":{"name":"Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering","volume":"653 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79023475","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: 3

Lanthanide doped bismuth tungstates: an investigation for LED and photocatalysis applications 镧系掺杂钨酸铋:LED光催化应用研究

Anadolu University Journal of Science and Technology-A Applied Sciences and Engineering Pub Date : 2018-12-31 DOI: 10.18038/aubtda.412443

Ceren Yilmaz Akkaya, U. Ünal

引用次数: 0