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The extended cubic B-spline algorithm for a modified regularized long wave equation

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Chinese Physics B 2013年第4期22卷 75-80页

作者： I.Dag D.Irk m.sari Faculty of Science and Arts Department of Mathematics and Computer Sciences Eskis ehir Osmangazi niversitesi Eskis ehir Turkey Faculty of Science and Arts Department of Mathematics Pamukkale niversitesi Denizli Turkey

A collocation method based on an extended cubic B-spline function is introduced for the numerical solution of the modified regularized long wave equation. The accuracy of the method is illustrated by studying the single solitary wave propagation and the interaction of two solitary waves of the modified regularized long wave equation.

关键词： collocation methods solitary waves

mssbauer and electron microscopy study of martensitic transformations in an Fe-mn-mo alloy

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International Journal of minerals,metallurgy and materials 2010年第4期17卷 448-452页

作者： T.Kirindi U.sari m.Kurt Department of Computer Education and Instructional Technology Kirkkale University Kirkkale 71450Turkey Institute of Sciences Kirkkale University Yahsihan CampusKirkkale 71450Turkey

The kinetic,morphological,crystallographic,and magnetic characteristics of thermally induced martensites in Fe-13.4wt% mn-5.2wt%mo alloy were investigated by scanning electron microscopy（SEm）,transmission electron microscopy（TEm）,and m（o｜¨）ssbauer *** experimental results reveal that two types of thermal-induced martensites,e（hcp） andα＇（bcc） martensites,are formed in the as-quenched condition,and these transformations have athermal *** addition to the Fe-mn alloy does not change the coexistence ofεandα＇ martensites with the mn content between 10wt%and 15wt%.Besides,m（o｜¨）ssbauer spectra reveal a paramagnetic character with a singlet for theγ（fcc） austenite andεmartensite phases and a ferromagnetic character with a broad sextet for theα＇ martensite phase. The volume fraction ofα＇ martensite forming in the quenched alloy is much more than that of theεmartensite.

关键词： Fe-mn alloy molybdenum martensitic transformation scanning electron microscopy(SEm) transmission electron microscopy(TEm) mossbauer spectroscopy

Two-and three-dimensional stability analysis of underground storage caverns in soft rock(Cappadocia, Turkey) by finite element method

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Journal of mountain Science 2022年第4期19卷 1182-1202页

作者： sari mehmet Department of mining Engineering Aksaray UniversityAksaray 68100Turkey

Engineering design in soft rocks and its stability analysis exerts many challenges to rock engineers. many engineering works in Turkey’s Cappadocia region must face and tackle the existing sites covered by the soft rocks. This study is aimed to examine the stability condition of a typical underground storage cavern(USC) excavated in a soft rock in this region. For this purpose, two-and threedimensional stability analyses of the USCs were performed using the finite element method(FEm).Because of the inherent difficulty in characterizing soft/weak rock masses in the region using traditional classification systems, the stability of a typical USC was evaluated by representing the rock mass condition with two distinct scenarios in FEm *** these structures were unstable according to the 2D analysis conducted in RS2 software in the worstcase scenario, they were stable in the 3D analysis using RS3 software in both scenarios. Besides,feasible cover depths were examined to assess their possible effects on the factor of safety and deformation measurements. It was found that 15 m seems to be an optimal depth for excavating a typical USC in the soft rocks exposed in the region. The 3D FEm results provide valuable information to optimize the future planning and preliminary design of USCs.

关键词： Underground storage cavern Numerical modeling Soft rock FEm analysis Rock mass failure

New approaches to cognitive work analysis through latent variable modeling in mining operations

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International Journal of mining Science and Technology 2019年第4期29卷 549-556页

作者： S.Li Y.A.sari m.Kumral Department of mining and materials Engineering McGill University

This paper discusses the utilization of latent variable modeling related to occupational health and safety in the mining *** variable modeling,which is a statistical model that relates observable and latent variables,could be used to facilitate researchers’understandings of the underlying constructs or hypothetical factors and their magnitude of effect that constitute a complex *** enhanced understanding,in turn,can help emphasize the important factors to improve mine *** most commonly used techniques include the exploratory factor analysis(EFA),the confirmatory factor analysis(CFA)and the structural equation model with latent variables(SEm).A critical comparison of the three techniques regarding mine safety is *** applications of latent variable modeling in mining engineering are *** this scope,relevant research papers were *** suggest that the application of such methods could prove useful in mine accident and safety *** of latent variables analysis in cognitive work analysis was proposed to improve the understanding of human-work relationships in mining operations.

关键词： Latent variables Exploratory factor analysis Confirmatory factor analysis Structural equation modeling Occupational health and safety mine safety

Effects of aging on the microstructure of a Cu-Al-Ni-mn shape memory alloy

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International Journal of minerals,metallurgy and materials 2011年第4期18卷 430-436页

作者： U.sari T.Kirindi F.Ozcan m.Dikici Department of Elementary Education Elementary Science EducationKirikkale UniversityKirikkale 71450Turkey Department of Computer Education and Instructional Technology Kirikkale UniversityKirikkale 71450Turkey Institute of Sciences Kirikkale UniversityKirikkale 71450Turkey Department of Physics Kirikkale UniversityKirikkale 71450Turkey

The influence of aging on the microstructure and mechanical properties of Cu-11.6wt%Al-3.9wt%Ni-2.5wt%mn shape memory alloy（SmA） was studied by means of scanning electron microscopy（SEm）,transmission electron microscopy（TEm）,X-ray diffractometer,and differential scanning calorimeter（DSC）.Experimental results show that bainite,γ2,and α phase precipitates occur with the aging effect in the *** aging at 300°C,the bainitic precipitates appear at the early stages of aging,while the precipitates of γ2 phase are observed for a longer aging *** the aging temperature increases,the bainite gradually evolves into γ2 phase and equilibrium α phase（bcc） precipitates from the remaining parent ***,the bainite,γ2,and α phases appear,while the martensite phase disappears progressively in the *** bainitic precipitates decrease the reverse transformation temperature while the γ2 phase precipitates increase these temperatures with a decrease of solute content in the retained parent *** the other hand,these precipitations cause an increasing in hardness of the alloy.

关键词： copper alloys shape memory effect martensitic transformations aging precipitates

Nonlinear forced vibration in a subcritical regime of a porous functionally graded pipe conveying fluid with a retaining clip

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Applied mathematics and mechanics(English Edition) 2025年第1期46卷 101-122页

作者： m.GHOLAmI m.EFTEKHARI Department of mechanical Engineering Shahid Bahonar University of Kerman

This study examines the nonlinear behaviors of a clamped-clamped porous pipe made of a functionally graded material(FGm) that conveys fluids and is equipped with a retaining clip, focusing on primary resonance and subcritical dynamics. The nonlinear governing equations for the FGm pipe are derived by the extended Hamilton's principle, and subsequently discretized through the application of the Galerkin *** direct method of multi-scales is then used to solve the derived equations. A thorough analysis of various parameters, including the clip stiffness, the power-law index, the porosity, and the clip location, is conducted to gain a comprehensive understanding of the system's nonlinear dynamics. Through the analysis of the first natural frequency, the study highlights the influence of the flow velocity and the clip stiffness, while the comparisons with metallic pipes emphasize the role of FGm composition. The examination of the forced response curves reveals saddle-node bifurcations and their dependence on parameters such as the detuning parameter and the power-law index, offering valuable insights into the system's nonlinear resonant behavior. Furthermore, the frequency-response curves illustrate the hardening nonlinearities influenced by factors such as the porosity and the clip stiffness, revealing nuanced effects on the system response and resonance characteristics. This comprehensive analysis enhances the understanding of nonlinear behaviors in FGm porous pipes with a retaining clip, providing key insights for practical engineering applications in system design and optimization.

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Synthesis of Different TiO2 Nanostructures and Their Physical Properties

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Chinese Physics Letters 2017年第11期34卷 53-56页

作者： T.Hoseinzadeh Z.Ghorannevis m.Ghoranneviss m.K.Salem A.H.sari Department of Physics Science and Research BranchIslamic Azad UniversityTehranIran Department of Physics Karaj BranchIslamic Azad UniversityKarajIran

Titanium dioxide （TiO2） nanosheet, nanorod and nanotubes are synthesized using chemical vapor deposition （CVD） and anodizing processes. TiO2 nanosheets are grown on Ti foil which is coated with Au catalyst in CVD, TiO2 nanorods are synthesized on treated Ti foil with HCl by CVD, and TiO2 nanotubes are prepared by the three-step anodization method. Scanning electron microscopy shows the final TiO2 structures prepared using three processes with three different morphologies of nanosheet, nanorod and nanotube. X-ray diffraction verifies the presence of TiO2. TiO2 sheets and rods are crystalized in rutile phase, and TiO2 tubes after annealing turn into the anatase crystal phase. The optical investigations carried out by diffuse reflection spectroscopy reveal that the morphology of TiO2 nanostructures influencing their optical response and band gap energy of TiO2 is changed for different TiO2 nanostructures.

关键词： XRD SEm TiO Synthesis of Different TiO2 Nanostructures and Their Physical Properties

microtextural Characteristics and Origin of Dolomites in the Tepearasi Formation, SW of Beysehir-Konya, Turkey

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Acta Geologica Sinica(English Edition) 2002年第1期76卷 100-109页

作者： Erdogan TEKIN Ali sari Department of Geological Engineering Faculty of Engineering Ankara UniversityTandogan Ankara 06100 TurkeyDepartment of Geological Engineering Faculty of Engineering Ankara UniversityTandogan Ankara 06100 Turkey

The Tepearasi Formation of the autochthonous Geyikdagi Group in the CentralTauride Belt, SE of Beysehir, is Dogger in age and consists dominantly of massive limestones andgreyish dolomites occurring within the middle to upper sections. The total thickness of thedolomitic levels ranges from 100-300 m and laterally extends 500-700 m. Three types of dolomite weredistinguished through petrographic analyses: homogeneous, mottled (saddle-crystalline) andjoint-filling dolomite, which were interpreted to have formed in two different stages, earlydiagenetic and late diagenetic. The homogeneous dolomite of the early diagenetic stage islight-coloured and monotonous-textured and shows the form of a dolosparite mosaic. The mottleddolomite formed in the late diagenetic stage is light- to dark-coloured and coarsely granularidiomorphic. The other type of late diagenetic dolomite, described as the joint-filling type,presents a crystal growth pattern from the joint walls towards the centre of the joint space. It isassociated with coarse calcite crystals as well as primary dolomite crystal clasts which were formedin the early diagenetic stage. In addition to these characteristics, cataclastic texture indicatingthe influence of tectonism is also observed. microtexture-oriented scanning electron microscopy(SEm) studies indicate that mottled dolomites show zonal structures and contain secondarydissolution vugs. SEm studies also revealed the existence of some remains (calcite, clay etc.) injoint-filling dolomites. Analyses by energy dispersive spectrometry (EDS) indicate the existence ofclay minerals (likely to be illite) in the pores of dolomite. Isotope studies conducted to shedlight onto the origin of the dolomites of the Tepearasi Formation yielded the results of delta^18O=-2.48 to - 3.87 per thousand and delta^13C=0.93 to l.12 per thousand for the early diagenetichomogeneous dolomites. mottled and joint-filling type dolomites of the late diagenetic stage, on theother hand, gave the r

关键词： Tepearasi dolomites microtextural characteristics dolomitization models

Neurogenesis dynamics in the olfactory bulb:deciphering circuitry organization, function, and adaptive plasticity

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Neural Regeneration Research 2025年第6期20卷 1565-1581页

作者： moawiah m.Naffaa Department of Psychology and Neuroscience Duke UniversityDurhamNCUSA Department of Cell Biology Duke University School of MedicineDurhamNCUSA

Adult neurogenesis persists after birth in the subventricular zone, with new neurons migrating to the granule cell layer and glomerular layers of the olfactory bulb, where they integrate into existing circuitry as inhibitory interneurons. The generation of these new neurons in the olfactory bulb supports both structural and functional plasticity, aiding in circuit remodeling triggered by memory and learning processes. However, the presence of these neurons, coupled with the cellular diversity within the olfactory bulb, presents an ongoing challenge in understanding its network organization and function. moreover,the continuous integration of new neurons in the olfactory bulb plays a pivotal role in regulating olfactory information processing. This adaptive process responds to changes in epithelial composition and contributes to the formation of olfactory memories by modulating cellular connectivity within the olfactory bulb and interacting intricately with higher-order brain regions. The role of adult neurogenesis in olfactory bulb functions remains a topic of debate. Nevertheless, the functionality of the olfactory bulb is intricately linked to the organization of granule cells around mitral and tufted cells. This organizational pattern significantly impacts output, network behavior, and synaptic plasticity, which are crucial for olfactory perception and memory. Additionally, this organization is further shaped by axon terminals originating from cortical and subcortical regions. Despite the crucial role of olfactory bulb in brain functions and behaviors related to olfaction, these complex and highly interconnected processes have not been comprehensively studied as a whole. Therefore, this manuscript aims to discuss our current understanding and explore how neural plasticity and olfactory neurogenesis contribute to enhancing the adaptability of the olfactory system. These mechanisms are thought to support olfactory learning and memory, potentially through increased

关键词： network adaptability neurogenesis neuronal communication olfactory bulb olfactory learning olfactory memory synaptic plasticity