TURKISH PHYSICAL SOCIETY 35TH INTERNATIONAL PHYSICS CONGRESS (TPS35)最新文献

{"title":"Chaotic structure of CDS","authors":"M. Bildirici, Bahri Sonüstün, Seyit M. Gokmenoglu","doi":"10.1063/1.5135467","DOIUrl":"https://doi.org/10.1063/1.5135467","url":null,"abstract":"After globalization processed most of the countries and the revolutionary developments in information technologies, financial investment flows have increased and investors have had the chance of investing in a large number of countries, sectors and assets. For a profitable investment, investors need an indicator to evaluate the risk level of a country. CDS is probably the most important indicator to show the riskiness of a country because CDS rate is calculated with a large scale view including both economic and political issues. In this study, LLE and Shannon Entropy tests were utilized in order to determine the chaotic behavior of CDS for the USA, Turkey and China. According to the results, all CDS series have chaotic dynamics. These results indicate that the selected countries have a risky nature.After globalization processed most of the countries and the revolutionary developments in information technologies, financial investment flows have increased and investors have had the chance of investing in a large number of countries, sectors and assets. For a profitable investment, investors need an indicator to evaluate the risk level of a country. CDS is probably the most important indicator to show the riskiness of a country because CDS rate is calculated with a large scale view including both economic and political issues. In this study, LLE and Shannon Entropy tests were utilized in order to determine the chaotic behavior of CDS for the USA, Turkey and China. According to the results, all CDS series have chaotic dynamics. These results indicate that the selected countries have a risky nature.","PeriodicalId":233679,"journal":{"name":"TURKISH PHYSICAL SOCIETY 35TH INTERNATIONAL PHYSICS CONGRESS (TPS35)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127752384","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}

{"title":"Chaotic characteristic of inflation-unemployment relation in Turkey","authors":"M. Bildirici, Fulya Özaksoy Sonüstün","doi":"10.1063/1.5135468","DOIUrl":"https://doi.org/10.1063/1.5135468","url":null,"abstract":"In this paper, it was purposed to analyze the chaotic pattern of inflation-unemployment relation for the period from January, 1960 to April, 2019 in Turkey. For modelling this relation, oil prices were considered as an exogenous variable in examination of chaotic causal relation between inflation and unemployment. This model was applied in two stages: Firstly, the chaotic structure of the variables were determined by using Lyapunov Exponents and Henon Map and secondly by Hristu-Varsakelis and Kyrtsou(2010) [1] and Bai(2018) [2] Chaotic Causality Tests, the chaotic causal relations among the variables were decided. Because, these estimations are crucial especially for analyzing complex economic system of countries.In this paper, it was purposed to analyze the chaotic pattern of inflation-unemployment relation for the period from January, 1960 to April, 2019 in Turkey. For modelling this relation, oil prices were considered as an exogenous variable in examination of chaotic causal relation between inflation and unemployment. This model was applied in two stages: Firstly, the chaotic structure of the variables were determined by using Lyapunov Exponents and Henon Map and secondly by Hristu-Varsakelis and Kyrtsou(2010) [1] and Bai(2018) [2] Chaotic Causality Tests, the chaotic causal relations among the variables were decided. Because, these estimations are crucial especially for analyzing complex economic system of countries.","PeriodicalId":233679,"journal":{"name":"TURKISH PHYSICAL SOCIETY 35TH INTERNATIONAL PHYSICS CONGRESS (TPS35)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128021828","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}

{"title":"Structural and thermodynamical study of Cu-Zn-Al shape memory alloys with new compositions produced by hot isostatic press (HIP)","authors":"O. Karaduman, C. Canbay, N. Ünlü, İ. Özkul","doi":"10.1063/1.5135438","DOIUrl":"https://doi.org/10.1063/1.5135438","url":null,"abstract":"Hot isostatic press (HIP) is an advanced kind of powder metallurgy production technique which prevents vaporization loss of alloying elements with low melting points during melting. In this work, ternary Cu-Zn-Al shape memory alloys (SMAs) withnew chemical compositions were fabricated by using hot isostatic pressing technique,then the obtained alloys were homogenized at 900 °C and quenched in iced-brine water to surpass the formation of hypo-eutectoid precipitations and lead to the formation of β’1 martensite phase in the alloy. Then the small specimens of the alloy were undergone through thermal and structural measurements. The thermograms obtained from differential thermal analysis measurements of the alloy by DTA instrument demonstrated the characteristic hysteresis curves and peaks of martensitic phase transformations which indicated the shape memory effect (SME) property exists in the alloy. The start and finish temperatures of phase transitions and some other thermodynamical parameters were determined by using the data of these thermal measurements. The structural XRD analysis made in room conditions showed the patterns of martensitic structures. The average crystallite size of the alloys were computed by using XRD data. The valence electron concentration (VEC) value of the alloys were also calculated, since it is a pre-conditional and hypothetical sign of having SME property. Furthermore, the effect of HIP production technique on these new Cu-Zn-Al SMAs was discussed.Hot isostatic press (HIP) is an advanced kind of powder metallurgy production technique which prevents vaporization loss of alloying elements with low melting points during melting. In this work, ternary Cu-Zn-Al shape memory alloys (SMAs) withnew chemical compositions were fabricated by using hot isostatic pressing technique,then the obtained alloys were homogenized at 900 °C and quenched in iced-brine water to surpass the formation of hypo-eutectoid precipitations and lead to the formation of β’1 martensite phase in the alloy. Then the small specimens of the alloy were undergone through thermal and structural measurements. The thermograms obtained from differential thermal analysis measurements of the alloy by DTA instrument demonstrated the characteristic hysteresis curves and peaks of martensitic phase transformations which indicated the shape memory effect (SME) property exists in the alloy. The start and finish temperatures of phase transitions and some other thermodynamical parameters were determin...","PeriodicalId":233679,"journal":{"name":"TURKISH PHYSICAL SOCIETY 35TH INTERNATIONAL PHYSICS CONGRESS (TPS35)","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134278737","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}

{"title":"Conformal flat model in f(R, T) gravity","authors":"D. Taṣer, M. U. Dog̃ru","doi":"10.1063/1.5135449","DOIUrl":"https://doi.org/10.1063/1.5135449","url":null,"abstract":"In this paper, we have examined static conformally flat spherically symmetric model with perfect fluid in framework of f(R,T) gravity. Exact solutions of the model are obtained for f(R,T) = R+h(T) gravity. f(R,T) function, identified structure of field equation in modified gravity, is attained to according as radial coordinate. Also, energy conditions of matter distribution are investigated by means of graphical representations. Finally, we have summarized and discussed physical behaviour of this solution.","PeriodicalId":233679,"journal":{"name":"TURKISH PHYSICAL SOCIETY 35TH INTERNATIONAL PHYSICS CONGRESS (TPS35)","volume":"682 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132546453","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}

{"title":"Energy harvesting sensor – PZT0,5M0,5(M:PVC, PP, PVDF) composite thick film equipped with SiO2","authors":"I. Sabikoglu","doi":"10.1063/1.5135403","DOIUrl":"https://doi.org/10.1063/1.5135403","url":null,"abstract":"PZT (Lead zircon titanate) material has been used for many years because of its unique piezoelectric properties especially in conversion of electrical energy to mechanical energy and vice versa, and it is the most used material in this piezoelectric area. These kinds of piezoelectric materials, which can be produced as thin or thick film, have a wide range of uses in electronics such as; ultrasonic applications, in aircraft air-flames, structural health monitoring, and in energy harvesting as actuators or transducers, due to its large surface area and flexibility. In this study, composite thick films were produced with PZT piezoelectric material by using different polymers. In addition, synthesized in nano size the SiO2 (silicon dioxide) spheres were added to the films. PZT-5H (Navy Type VI) piezoelectric materials were made into film by melting method with the different polymers (Polyvinyl chloride - PVC, Polypropylene - PP, and Polyvinylidene fluoride - PVDF). The SiO2 spheres, which have about 120nm particle size, were added to this polymer PZT films at a rate of 1%. In present study, invert microscope images and scanning electron microscope (SEM) images of the films were obtained, in addition to this, the capacitance, dielectric constant, resonance and anti-resonance frequencies and effective efficiencies were calculated with a homemade system. It can be decided that the produced films can be used as low frequency actuators or transducer in energy harvesting system.PZT (Lead zircon titanate) material has been used for many years because of its unique piezoelectric properties especially in conversion of electrical energy to mechanical energy and vice versa, and it is the most used material in this piezoelectric area. These kinds of piezoelectric materials, which can be produced as thin or thick film, have a wide range of uses in electronics such as; ultrasonic applications, in aircraft air-flames, structural health monitoring, and in energy harvesting as actuators or transducers, due to its large surface area and flexibility. In this study, composite thick films were produced with PZT piezoelectric material by using different polymers. In addition, synthesized in nano size the SiO2 (silicon dioxide) spheres were added to the films. PZT-5H (Navy Type VI) piezoelectric materials were made into film by melting method with the different polymers (Polyvinyl chloride - PVC, Polypropylene - PP, and Polyvinylidene fluoride - PVDF). The SiO2 spheres, which have about 120nm pa...","PeriodicalId":233679,"journal":{"name":"TURKISH PHYSICAL SOCIETY 35TH INTERNATIONAL PHYSICS CONGRESS (TPS35)","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124198753","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}

{"title":"A practical method to synthesis few-layered graphene sheets via electrochemical with microwave assisted exfoliation","authors":"Ala K. Jehad, K. Kocabaş, M. Yurddaşkal","doi":"10.1063/1.5135407","DOIUrl":"https://doi.org/10.1063/1.5135407","url":null,"abstract":"In this work, quick and practical approach has been used to produce few-layered graphene sheets (FGs). Graphene sheets are synthesized by electrochemical exfoliation method using H2SO4 as an electrolyte with two graphite rods as anode and cathode electrodes. The graphite source in this work is three different grades of softness of pencil leads; B, 4B, and 8B. Then the few-layered graphene sheets are obtained by quick exfoliation of microwaves radiation. The prepared graphene sheets are characterized using various characterization tools such as Raman spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The obtained results have showed that, the highest softness of pencil lead used, the fewer layers of exfoliated graphene sheets acquired. This electrochemical exfoliation method with microwave-assisted is a very promising method that suggests convenient, low-cost, and efficient way to produce few-layered graphene sheets with high yield.In this work, quick and practical approach has been used to produce few-layered graphene sheets (FGs). Graphene sheets are synthesized by electrochemical exfoliation method using H2SO4 as an electrolyte with two graphite rods as anode and cathode electrodes. The graphite source in this work is three different grades of softness of pencil leads; B, 4B, and 8B. Then the few-layered graphene sheets are obtained by quick exfoliation of microwaves radiation. The prepared graphene sheets are characterized using various characterization tools such as Raman spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The obtained results have showed that, the highest softness of pencil lead used, the fewer layers of exfoliated graphene sheets acquired. This electrochemical exfoliation method with microwave-assisted is a very promising method that suggests convenient, low-cost, and efficient way to produce few-layered graphene sheets with high yield.","PeriodicalId":233679,"journal":{"name":"TURKISH PHYSICAL SOCIETY 35TH INTERNATIONAL PHYSICS CONGRESS (TPS35)","volume":"25 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120911133","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}

{"title":"H-alpha spectra of the emission nebulae: NGC1499","authors":"M. Sahan, E. Bolat","doi":"10.1063/1.5135415","DOIUrl":"https://doi.org/10.1063/1.5135415","url":null,"abstract":"Hα line spectra from the NGC1499 emission nebula have been investigated using DEFPOS spectrometer within this contribution. Some important physical properties from these spectra such as the mean line widths, radial velocities, the intensities and the mean emissions were obtained. The mean line width and radial velocity were found to be -10.77 km/sec 35.10 km/sec, respectively. The mean intensity and the emission measure values were found to be 530.53 R and mean 1039.41 cm−6pc, respectively. The mean LSR velocities and line widths were compared with some previous works from the literature. The intensity data were also compared with the data obtained from the maps created by using APER and SKY codes. We found that our results give similar variations with the VTSS (mean 430.91 R) map. We believe that these new results present a significant contribution to the literature.","PeriodicalId":233679,"journal":{"name":"TURKISH PHYSICAL SOCIETY 35TH INTERNATIONAL PHYSICS CONGRESS (TPS35)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125065590","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}

{"title":"Enhanced antibacterial activity of silver-doped chitosan nanofibers","authors":"N. C. Bezir, B. Bozkurt, A. Evcin, Burcu Özcan, Esengul Kır, G. Akarca, O. Ceylan","doi":"10.1063/1.5135401","DOIUrl":"https://doi.org/10.1063/1.5135401","url":null,"abstract":"The production of nanofibers with specific properties by electrospinning has attracted significant attention for antibacterial applications. Electrospun nanofibers incorporated with antimicrobial silver agent have been synthesized with antimicrobial capability against S. aureus bacteria. Chitosan solution was prepared by dissolving chitosan in acetic acid following by stirring for 24 h at room temperature. Different amount of silver were added to chitosan solutions. The crystalline structure, thermal, morphologies and nanostructure properties of the sample are characterized by scanning electron microscopy (SEM), energy dispersive analysis of SEM-EDX and thermal gravimetry-differential scanning calorimeter (TG-DSC) respectively. Ag-doped chitosan nanofibers were successfully prepared by electrospinning. The antibacterial activity of Ag-doped chitosan nanofibers were examined on S.aureus bacteria.The production of nanofibers with specific properties by electrospinning has attracted significant attention for antibacterial applications. Electrospun nanofibers incorporated with antimicrobial silver agent have been synthesized with antimicrobial capability against S. aureus bacteria. Chitosan solution was prepared by dissolving chitosan in acetic acid following by stirring for 24 h at room temperature. Different amount of silver were added to chitosan solutions. The crystalline structure, thermal, morphologies and nanostructure properties of the sample are characterized by scanning electron microscopy (SEM), energy dispersive analysis of SEM-EDX and thermal gravimetry-differential scanning calorimeter (TG-DSC) respectively. Ag-doped chitosan nanofibers were successfully prepared by electrospinning. The antibacterial activity of Ag-doped chitosan nanofibers were examined on S.aureus bacteria.","PeriodicalId":233679,"journal":{"name":"TURKISH PHYSICAL SOCIETY 35TH INTERNATIONAL PHYSICS CONGRESS (TPS35)","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130812618","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}

{"title":"Preface: Turkish Physical Society 35th International Physics Congress (TPS35)","authors":"AkkusBaki, MutluR. Burcu Çakirli, GüdekliErtan, KinaciBarış, GuzelcimenFeyza, DoganGulfem Susoy, ÖztürkFatma Çağla, ErtoprakAyşegül","doi":"10.1063/1.5135397","DOIUrl":"https://doi.org/10.1063/1.5135397","url":null,"abstract":"","PeriodicalId":233679,"journal":{"name":"TURKISH PHYSICAL SOCIETY 35TH INTERNATIONAL PHYSICS CONGRESS (TPS35)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133927701","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}

{"title":"Quantum laboratory setup for future wireless communication systems","authors":"Muhammad Sohaib J. Solaija, Muhammad Bilal Janjua, Liza Afeef, Armed Tusha, Ahmet Enes Duranay, H. Arslan, Orkun Hasekioglu","doi":"10.1063/1.5135410","DOIUrl":"https://doi.org/10.1063/1.5135410","url":null,"abstract":"Fifth generation of wireless communication envisages a diverse network that imposes stringent requirements regarding capacity, reliability, security, latency and seamless connectivity. These lofty goals have driven researchers to look for technologies capable of supporting conventional methods. Application of quantum mechanics to the domain of communications has been considered for a while now but the reliance of any quantum phenomena on experimental verification remains an obstacle in its widespread use. To serve this purpose, we propose establishing a quantum optics laboratory in Turkey which will allow implementation, analysis and investigation of the various promising quantum communication tools. This work is directed towards description and experimental verification of some well-known quantum experiments, from relatively simpler ones such as single or entangled photon generation to the more evolved experiments like quantum random number generation and quantum key distribution.","PeriodicalId":233679,"journal":{"name":"TURKISH PHYSICAL SOCIETY 35TH INTERNATIONAL PHYSICS CONGRESS (TPS35)","volume":"267 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133962764","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}