A bi-material property based FE modelling method for progressive damage analyses of composite double-lap bolted joints
Publication date: Available online 18 October 2018Source: Results in PhysicsAuthor(s): Meijuan Shan, Fengrui Liu, Ziang Fang, Libin Zhao, Jianyu ZhangAbstractA bi-material property method was proposed to describe mechanical properties of the unidirectional composite lamina. It divided the lamina into the fiber layer and the resin layer, which have different material properties and are responsible for the intra-laminar and inter-laminar properties, respectively. Furthermore, a finite element modelling method with the composite lamina simulated by the bi-material property method was presented. Combined with a Hashin-type fai...
Source: Results in Physics - October 19, 2018 Category: Physics Source Type: research

Experimental Investigation of Evaporative Cooling for Enhancing Photovoltaic Panels Efficiency
Publication date: Available online 18 October 2018Source: Results in PhysicsAuthor(s): Zeyad A. Haidar, Jamel Orfi, Zakariya KaneesamkandiAbstractThis paper presents the results of an experimental study on the effect of cooling of solar photovoltaic (PV) panels by evaporative cooling. The evaporation latent heat was utilized to absorb the generated heat from the body of PV module reducing its temperature. A simple and effective experimental setup was designed, constructed and tested under outdoor conditions. The back surface of a PV panel was wetted and exposed to surrounding. Water was supplied to the back of the PV panel...
Source: Results in Physics - October 19, 2018 Category: Physics Source Type: research

Application of kinetic flux vector splitting scheme for solving viscous quantum hydrodynamical model of semiconductor devices
Publication date: December 2018Source: Results in Physics, Volume 11Author(s): Ubaid Ahmed Nisar, Waqas Ashraf, Shamsul QamarAbstractIn this article, one-dimensional viscous quantum hydrodynamical model of semiconductor devices is numerically investigated. The model treats the propagation of electrons in a semiconductor device as the flow of a charged compressible fluid. It plays an important role in predicting the behavior of electron flow in semiconductor devices. The nonlinear viscous quantum hydrodynamic models contain Euler-type equations for density and current, viscous and quantum correction terms, and a Poisson equ...
Source: Results in Physics - October 19, 2018 Category: Physics Source Type: research

Numerical study of frequency mixing in a focused ultrasonic field in bubbly liquids from a dual-frequency spherical source
Publication date: Available online 17 October 2018Source: Results in PhysicsAuthor(s): Maria Teresa Tejedor Sastre, Christian VanhilleAbstractThe aim of this work is to study the nonlinear frequency mixing that comes out in the focus region in a bubbly liquid when a spherical transducer emits a dual-frequency ultrasonic wave of finite amplitude in a three-dimensional open domain with axial symmetry. The nonlinear interaction between the acoustic field and the bubble vibrations is modeled through a coupled differential system formed by the wave equation and a Rayleigh-Plesset equation. Simulations are performed by means of ...
Source: Results in Physics - October 17, 2018 Category: Physics Source Type: research

Probability distribution of the orbital angular momentum mode of the ultrashort Laguerre-Gaussian pulsed beam propagation in oceanic turbulence
Publication date: Available online 15 October 2018Source: Results in PhysicsAuthor(s): Ye Li, Yi-xin Zhang, Yun ZhuAbstractBy introducing the orbital angular momentum (OAM) eigenfunctions of the pulsed beam and two-frequency mutual coherence function in oceanic turbulence, we establish the received probability distribution of OAM modes of the ultrashort Laguerre-Gaussian pulsed beam propagating through oceanic turbulence. Our results show that the higher rate of dissipation of kinetic energy per unit mass of fluid, larger inner scale, smaller ratio of temperature and salinity contributions to the refractive index spectrum,...
Source: Results in Physics - October 16, 2018 Category: Physics Source Type: research

Size-dependent strength and interface-dominated deformation mechanisms of Cu/Zr multilayer nanofilms
Publication date: Available online 13 October 2018Source: Results in PhysicsAuthor(s): Kuo-Chin Hsu, Jia-Yuan Chen, Te-Hua Fang, Ming-Hung LinAbstractMolecular dynamics (MD) simulations are performed in this study to investigate the mechanical properties of Cu/Zr multilayer nanofilms (MNFs) during tensile and compression tests. The results reveal slip behavior in the tensile test and the phase transformation process in the compression test, where the former only occurs in the Cu film during the tensile test and the latter only occurs in the Zr film during the compression test. In addition, the effects of temperature, growt...
Source: Results in Physics - October 15, 2018 Category: Physics Source Type: research

Investigation of ZnS Films prepared with different solvents and Zinc sources under Different Experimental Conditions
Publication date: Available online 13 October 2018Source: Results in PhysicsAuthor(s): Kegao Liu, Jing Li, Yong Xu, Huiping Li, Wencheng GaoAbstractZnS films were prepared by chemical co-reduction method in this work. The influencing factors such as the kind of the solvent, reaction temperature and holding time on ZnS films were mainly investigated by repeated experiments. Experimental results show that, when using different solvents and zinc sources, the X-ray diffraction (XRD) peak intensities of ZnS products obtained by using ethanol as the solvent are much higher than those obtained by using ethylene glycol as the solv...
Source: Results in Physics - October 15, 2018 Category: Physics Source Type: research

Temperature-dependent tunable terahertz metamaterial absorber for the application of light modulator
Publication date: Available online 13 October 2018Source: Results in PhysicsAuthor(s): Dan Li, Hailong Huang, Hui Xia, Jianping Zeng, Hongjian Li, Ding XieAbstractA temperature-dependent tunable metamaterial absorber (MA) based on strontium titanate (STO) is proposed at terahertz regions. The MA is a three-layer structure, which is composed of double metallic split-ring resonators (SRRs), silicon substrate, and the ground metallic layer. Numerical results show that the single-band high absorption with the coefficient of 99% is achieved at the frequency of 1.23 THz, and the position of resonant frequency is blue-shifted by ...
Source: Results in Physics - October 15, 2018 Category: Physics Source Type: research

Dynamical polarization and the optical response of silicene and related materials
Publication date: Available online 12 October 2018Source: Results in PhysicsAuthor(s): Chen-Huan WuAbstractWe discuss the dynamical polarization and optical response in low-frequency regime under in-plane polarized driving field of the silicene. The dynamical polarization, dielectric function, and absorption of radiation in infrared region are obtained and shown intuitively in the momentum-frequency space. They are found distinguishing for the cases that chemical potential larger than the band gap and chemical potential smaller than the band gap. The optical properties of silicene and the related group-V and group-VI mater...
Source: Results in Physics - October 13, 2018 Category: Physics Source Type: research

Prediction of Phosphate Concentrate Grade Based on Artificial Neural Network Modeling
Publication date: Available online 13 October 2018Source: Results in PhysicsAuthor(s): Yi Zhang, Hong Chen, Bingqiao Yang, Shupei Fu, Jie Yu, Ziyue WangAbstractIn order to determine the grade of phosphate concentrate rapidly and accurately on-line, first, the surface color parameters of primary ore, concentrated and tailing of phosphate rock was collected and extracted based on a self-designing surface color acquisition device. Then these parameters were modeled by artificial neural network. The results showed that the 5-12-1 BP model established by artificial neural network could achieve better prediction results with err...
Source: Results in Physics - October 13, 2018 Category: Physics Source Type: research

A simplified formulation for calculation of minority-carrier effective lifetime
Publication date: Available online 13 October 2018Source: Results in PhysicsAuthor(s): Xiao-Xia Li, Ji-Huan HeAbstractAn improved simple equation to calculate the minority-carrier effective lifetime in photoconductance measurements is proposed by the perturbation method. When the given constraints are satisfied, the given formulation leads to a fast and accurate determination of effective lifetime from the bulk lifetime, surface recombination velocity, the thickness of the wafer, and diffusion coefficient. (Source: Results in Physics)
Source: Results in Physics - October 13, 2018 Category: Physics Source Type: research

On the motion of a heavy bead sliding on a rotating wire – Fractional treatment
Publication date: December 2018Source: Results in Physics, Volume 11Author(s): Dumitru Baleanu, Jihad H. Asad, Mohsen AlipourAbstractIn this work, we consider the motion of a heavy particle sliding on a rotating wire. The first step carried for this model is writing the classical and fractional Lagrangian. Secondly, the fractional Hamilton’s equations (FHEs) of motion of the system is derived. The fractional equations are formulated in the sense of Caputo. Thirdly, numerical simulations of the FHEs within the fractional operators are presented and discussed for some fractional derivative orders. Numerical results are...
Source: Results in Physics - October 13, 2018 Category: Physics Source Type: research

Design and Analysis of Slotted Core Photonic Crystal Fiber for Gas sensing Application
Publication date: Available online 12 October 2018Source: Results in PhysicsAuthor(s): Bikash Kumar Paul, E. Rajesh, Sayed Asaduzzaman, Md. Shadidul Islam, Kawsar Ahmed, I.S. Amiri, R. ZakariaAbstractIn this paper, a slotted core photonic crystal fiber (PCF) has been designed. A rigorous numerical investigation has been done over the wider range of the wavelength from 1.30 µm to 2.0 µm near inferred region (IR). By employing full vectorial finite element method (FV-FEM) having completely circular anisotropic perfectly matched layer (C-PML) different optical parameter such as nonlinearity, confinement loss, sens...
Source: Results in Physics - October 12, 2018 Category: Physics Source Type: research

Impact of ionizing radiation doses on nanocrystalline TiO2 layer in DSSC’s photoanode film
In this study, 10µm thick TiO2 (Degussa-P25) was deposited as a photoanode film on glass substrate by doctor blade method. The deposited film was subjected to different gamma radiation doses (0-20 kGy) to study the effect of ionizing radiation on structural, morphological, compositional, and optical properties of the film. At 10 kGy dose, dislocation density (DD), strain, crystallites per unit surface area (CPSA), specific surface area (SSA) of anatase phase (101) of the film were decreased abruptly, conversely, crystal size and morphology index (MI) were increased at the same radiation dose slowly. UV-Vis-NIR spectr...
Source: Results in Physics - October 12, 2018 Category: Physics Source Type: research

Refractive index sensor using dual core photonic crystal fiber – glucose detection applications
Publication date: December 2018Source: Results in Physics, Volume 11Author(s): S. Maheswaran, P.G. Kuppusamy, S.M. Ramesh, T.V.P. Sundararajan, P. YupapinAbstractThe article reports the numerical analysis of refractive index sensor using dual core photonic crystal fiber (PCF) which is aided for the detection of glucose concentration contains in the blood samples of humans. The sensing mechanism is facilitated by tuning the coupling between the silica mode and analyte mode. The change in concentration of glucose is reflected as shifts in the transmission spectrum. The sensitivity is reported as 8333 nm/[RIU] for the sampl...
Source: Results in Physics - October 12, 2018 Category: Physics Source Type: research

Microstructure and hardness of SAC305 and SAC305-0.3Ni solder on Cu, high temperature treated Cu, and graphene-coated Cu substrates
In this study, SAC305 and SAC305-0.3Ni solder balls were soldered onto Cu, high temperature treated Cu (H-Cu) and graphene coated Cu (G-Cu) substrates, respectively. The microstructure, the interfacial reaction, and the hardness of the solder joints were investigated. The interfacial intermetallic compound (IMC) is Cu6Sn5 in the solder joints of SAC305/Cu, SAC305/H-Cu, and SAC305/G-Cu. With the addition of 0.3 wt% Ni in the SAC305 solder, the interfacial IMC on Cu, H-Cu, and G-Cu transforms from Cu6Sn5 into (Cu, Ni)6Sn5. The thickness of Cu6Sn5 and (Cu, Ni)6Sn5 is the lowest on G-Cu substrate. Meanwhile, smooth (Cu, Ni)6Sn...
Source: Results in Physics - October 11, 2018 Category: Physics Source Type: research

Low Material Loss and Dispersion Flattened Fiber for Single Mode THz-Wave Transmission Applications
Publication date: Available online 11 October 2018Source: Results in PhysicsAuthor(s): Bikash Kumar Paul, Md. Shadidul Islam, Shuvo Sen, Kawsar Ahmed, Muhammad Shahin UddinAbstractIn the article, a very low loss terahertz (THz) photonic crystal fiber (PCF) has been proposed and investigated precisely. The investigation results have proved that the designed PCF shows very low effective material loss (EML) of 0.03 cm-1 at 1.0 THz that simultaneously indicates about 85 % reduction of bulk absorption loss of the hosting material. Moreover, other optical parameters of the PCF such as effective mode area (EMA), confinement loss ...
Source: Results in Physics - October 11, 2018 Category: Physics Source Type: research

Assessment of Health Risk due to the Exposure of Heavy Metals in Soil around Mega Coal-Fired Cement Factory in Nigeria
Publication date: Available online 10 October 2018Source: Results in PhysicsAuthor(s): Matthew Tikpangi Kolo, Mayeen Uddin Khandaker, Yusoff Mohd Amin, Wan Hasiah Binti Abdullah, David A. Bradley, Khalid S. AlzimamiAbstractMobilization and dispersion of potentially toxic elements into the atmosphere and human environment due to industrial and anthropogenic activities have been associated with significant human health challenges. In this investigation, 20 surface soil samples collected around a coal-fired cement factory in northeast Nigeria were analysed for their heavy metal (Cr, Pb, Ni, Cu, Zn and Mn) concentrations using...
Source: Results in Physics - October 10, 2018 Category: Physics Source Type: research

Free vibration of arbitrary-shaped laminated triangular thin plates with elastic boundary conditions
Publication date: December 2018Source: Results in Physics, Volume 11Author(s): Xiuhai Lv, Dongyan ShiAbstractThis paper studies the free vibration of arbitrary shaped laminated triangular thin plates based on a modified Fourier series method. An arbitrary shaped triangular plate is mapped into a right-angled isosceles triangular plate with unit length by the coordinate transformation. By padding another right–angled isosceles triangular plate which is near zero thickness on the plate after transformation. The displacement functions are then generally expressed as the combinations of Fourier cosine series and suppleme...
Source: Results in Physics - October 10, 2018 Category: Physics Source Type: research

Exact solution of non-Newtonian fluid motion between side walls
Publication date: December 2018Source: Results in Physics, Volume 11Author(s): Muhammad Asif, Sami Ul Haq, Saeed Islam, Ilyas Khan, Iskander TliliAbstractIn this paper non-Newtonian flow (Brinkman) type fluid over an infinite plate between side walls is being investigated. The flow is generated by oscillating shear stress of the bottom plate and the solutions are obtained by using Fourier integral transformation. The obtained results are presented in steady and transient states for both sine and cosine-shaped shear stresses. The general solutions are reduced to some special cases corresponding, namely to the Brinkman type ...
Source: Results in Physics - October 10, 2018 Category: Physics Source Type: research

The effect of electron-donating substituents on tuning the nonlinear optical properties of pyrene-core arylamine derivatives: DFT calculations
Publication date: Available online 9 October 2018Source: Results in PhysicsAuthor(s): Nuha Andijani, Nuha A. WazzanAbstractUsing the LC-DFT/M06 functional, we elucidate the structure-property relationship for the effect of electron-donating substituents on tuning the nonlinear optical (NLO) and optical properties of a series of pyrene-core (PY) arylamine derivatives. After successfully synthesizing N1,N1,N3,N3,N6,N6,N8,N8-octakis(4-methoxyphenyl)pyrene-1,3,6,8-tetraamine (PYOMe), its crystallographic data and photophysical properties were reported. By substituting/removing the terminal −OMe donors in PYOMe with group...
Source: Results in Physics - October 9, 2018 Category: Physics Source Type: research

Computational Aspect of Fermi Distribution Application on Fission Yield Data Calculation
Publication date: Available online 6 October 2018Source: Results in PhysicsAuthor(s): R. KurniadiAbstractIn fission toy model (FTM), point particle treats as nucleon. It is assumed that nucleons do not interact between them; nucleon distribution adopts Fermi distribution function. The sigma parameter σ is introduced as the surface thickness of the nucleus in the model. One random value of sigma represents one fission event. Rupture neck is approximated by using polynomial of n-th order, where n is the even number. The spheres and neck surfaces shape the droplet. Elongation, which is the distance value between two cen...
Source: Results in Physics - October 7, 2018 Category: Physics Source Type: research

Cohesive zone modeling of hydrogen-induced delayed intergranular fracture in high strength steels
Publication date: Available online 6 October 2018Source: Results in PhysicsAuthor(s): Weijie Wu, Yanfei Wang, Ping Tao, Xinfeng Li, Jianming GongAbstractA sequentially coupled hydrogen diffusion-cohesive zone modeling approach was applied to the simulation of hydrogen-induced delayed intergranular (IG) fracture in high-strength low-alloy steels. The effects of multiple hydrogen trap sites and mechanical deformation on the diffusion and cohesive strength of grain boundaries (GB) were taken account, in order to reveal that the hydrogen trapped at GB play a dominant role in the degradation processes of hydrogen of high-streng...
Source: Results in Physics - October 7, 2018 Category: Physics Source Type: research

Comments on the paper: New transform iterative method for solving some Klein–Gordon equations by Aisha Abdullah Alderremy and et al. Results in Physics 10 (2018) 655–659
Publication date: December 2018Source: Results in Physics, Volume 11Author(s): Lazhar BougoffaAbstractIn this short note, we show that all results presented in Alderremy et al. (2018) are straightforward and can be obtained immediately as special cases by means of Laplace’s transform. Furthermore, we show that Elzaki’s transform is a special case of Laplace’s transform, and then cannot be a new transform. Also, we mention that the application of the recursion scheme of the new iterative method (NIM) is incorrect. (Source: Results in Physics)
Source: Results in Physics - October 7, 2018 Category: Physics Source Type: research

Long-wavelength spectral filtering in anisotropic tapered fiber
We report on special tapered large mode area (LMA) polarization-maintaining fibers demonstrating inherit long-wavelength spectral filtering. The attenuation more than 25 dB of long-wavelength spectral range arising after amplified spontaneous emission (ASE) of a preamplifier, and also preservation of polarization state (extinction ratio more than 20 dB) and mode composition is presented in these fibers. Integration of this approach into the amplifier gain medium is promising for solving the problem of effective spectral filtration and polarized light generation. (Source: Results in Physics)
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Area of reflection of longitudinal waves in multilayer Fibonacci arrangements
Publication date: Available online 25 September 2018Source: Results in PhysicsAuthor(s): L. Castro-Arce, Martin E. Molinar-T, Julio C. Campos-G, Carlos Figueroa- NSummaryIn this article, we study the total reflection in 1D phonic crystals in quasiperiodic Fibonacci type arrangements of solid / solid layers. It was found that the reflection occurs in an area centered at a normalized frequency of 2π, and an angle of incidence of 61.6o which has not been observed in periodic systems. For studies in arrangements n> 4, the geometric evolution and breakdown of the area of interest is presented, starting from n = 6 arrays, ...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Preparation and physical properties of polypyrrole/zeolite composites
Publication date: Available online 26 September 2018Source: Results in PhysicsAuthor(s): Emma Ziezie Mohd Tarmizi, Hussein Baqiah, Zainal Abidin Talib, Halimah Mohamed KamariAbstractPolypyrrole (PPy′)/zeolite composites were synthesized via chemical oxidation of pyrrole in the presence of zeolite. FeCl3 was used as an oxidant with the FeCl3-to-pyrrole molar ratio (MR) equal to 1. The zeolite contents were 0, 5, 10, 15 and 20 % of the total weight of PPy′. For comparison, pure PPy′′ with FeCl3-pyrrole MR equal to 2 was also synthesized using the same method. The structural and physical properties of ...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Exact Solutions of Non-Newtonian flow Between Side Walls
Publication date: Available online 26 September 2018Source: Results in PhysicsAuthor(s): Muhammad Asif, Sami Ul Haq, Saeed Islam, Ilyas Khan, Iskander TliliAbstractIn this paper non-Newtonian flow (Brinkman) type fluid over an infinite plate between side walls is being investigated. The flow is generated by oscillating shear stress of the bottom plate and the solutions are obtained by using Fourier integral transformation. The obtained results are presented in steady and transient states for both sine and cosine-shaped shear stresses. The general solutions are reduced to some special cases corresponding, namely to the Brin...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Effect of shot peening on the fatigue properties of nickel-based superalloy GH4169 at high temperature
This study investigates the influence of shot peening on the fatigue properties of GH4169 alloy at 20°C, 350°C and 650°C in air. Work hardened layer with nanocrystals and deformation twins was generated in GH4169 surface after shot peening. Nanocrystallization process of microstructures was deeply discussed. The effect of twin morphology and compressive residual stress on fatigue properties was then analyzed in detail. Also, the fatigue fracture mechanism was systematically investigated. Results show that the depth of work hardened layer is about 96 μm and the increment of microhardness for the topmost surfa...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Investigation of foam structure formation in the freezing foaming process based on in-situ computed tomography
Publication date: Available online 26 September 2018Source: Results in PhysicsAuthor(s): Johanna Maier, Thomas Behnisch, Vinzenz Geske, Matthias Ahlhelm, David Werner, Tassilo Moritz, Alexander Michaelis, Maik GudeAbstractUsing the so-called Freeze-Foaming method, it is possible to ecologically create ceramic cellular scaffolds without a need for pore creators or organic scaffolds. One of their main applications can be found in the medical sector. Tailoring these ceramic foams for certain applications requires a defined and reproducible adjustment of their pores and pore morphology.This paper examines the foaming process d...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

XPS investigations of MOCVD tin oxide thin layers on Si nanowires array
Publication date: Available online 27 September 2018Source: Results in PhysicsAuthor(s): S.Yu. Turishchev, O.A. Chuvenkova, E.V. Parinova, D.A. Koyuda, R.G. Chumakov, M. Presselt, A. Schleusener, V. SivakovAbstractTin oxide thin layers were grown by metal-organic chemical vapor deposition technique on the top-down nanostructured silicon nanowires array obtained by metal-assisted wet-chemical technique from single crystalline silicon wafers. The composition of the formed layers were studied by high-resolution X-ray photoelectron spectroscopy of tin (Sn 3d) and oxygen (O 1s) atoms core levels. The ion beam etching was applie...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Comments on the paper: New transform iterative method for solving some Klein-Gordon equations by Aisha Abdullah Alderremy and et al. Results in Physics 10 (2018) 655-659
Publication date: Available online 27 September 2018Source: Results in PhysicsAuthor(s): Lazhar BougoffaAbstractIn this short note, we show that all results presented in [1] are straightforward and can be obtained immediately as special cases by means of Laplace’s transform. Furthermore, we show that Elzaki’s transform is a special case of Laplace’s transform, and then cannot be a new transform. Also, we mention that the application of the recursion scheme of the new iterative method (NIM) is incorrect. (Source: Results in Physics)
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Polarization dependence of SU-8 micro ring resonator
Publication date: Available online 29 September 2018Source: Results in PhysicsAuthor(s): M.M. Ariannejad, I.S. Amiri, S.R.B. Azzuhri, R. Zakaria, P. YupapinAbstractThis work describes the polarization study in the optical micro ring resonator systems. The use of polymeric materials for micro ring resonator structures recently has gained major interests due to many advantages such as enabling a rapid and straightforward fabrication process. Here we report a demonstration of an optical micro ring resonators comprised of polymer material, namely SU-8. We have shown the effects of the polarizations induced by the micro ring re...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Analyze the Multi-wire Magnetic Field of HGMS by Semi-analytical Method
Publication date: Available online 29 September 2018Source: Results in PhysicsAuthor(s): Mei Yuan, Huiqing Peng, Luzheng Chen, Yun LeiAbstractIn this paper, a semi-analytical method (SAM) to analyze the magnetic field distribution in High-Gradient Magnetic Separation (HGMS) was promoted, constituting a combination of conform mapping (includes Schwarz-Christoffel (S-C) mapping) and finite elements (FEM). Following the establishment of a 2-D physical model of cylindrical matrices in HGMS , the procedure including 4 steps was elaborated in this paper. The magnetic field of the cross-section cylindrical matrices could be regar...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Dielectric and impedance spectroscopic studies of three phase graphene/titania/poly(vinyl alcohol) nanocomposite films
Publication date: Available online 29 September 2018Source: Results in PhysicsAuthor(s): Saira Ishaq, Farah Kanwal, Shahid Atiq, Mahmoud Moussa, Umar Azhar, Iffrah Gul, Dusan LosicAbstractFlexible dielectric polymer composites with high dielectric permittivity and low dielectric loss have many applications in different areas of electronic industry. In this paper, we propose synthesis of flexible dielectric materials with efficient dielectric properties. We increased dielectric efficiency of poly(vinyl alcohol) by reinforcement of conducting graphene and rutile titania fillers in different weight fractions. The superiority ...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Darcy Forhheimer aspects for CNTs nanofluid past a stretching cylinder; Using Keller box method
Publication date: Available online 1 October 2018Source: Results in PhysicsAuthor(s): Zakir Hussain, Tasawar Hayat, Ahmed Alsaedi, Bashir AhmedAbstractPresent study deals with Darcy Forhheimer application to CNTs nanofluid flow due to a cylinder and flat sheet. Thermal conductivity of CNTs nanofluid is inspected under renovated Hamilton-Crosser and Xue models. The solute concentration is regulated through a simple isothermal model of homogeneous-heterogeneous reactions. Thermodynamics processes of reactant and autocatalyst analyze the impact of temperature phase changes like evaporation or convection. It is considered that...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Refractive Index Sensor Using Dual Core Photonic Crystal Fiber - Glucose Detection Applications
Publication date: Available online 5 October 2018Source: Results in PhysicsAuthor(s): S. Maheswaran, P.G. Kuppusamy, S.M. Ramesh, T.V.P. Sundararajan, P. YupapinAbstractThe article reports the numerical analysis of refractive index sensor using dual core photonic crystal fiber (PCF) which is aided for the detection of glucose concentration contains in the blood samples of humans. The sensing mechanism is facilitated by tuning the coupling between the silica mode and analyte mode. The change in concentration of glucose is reflected as shifts in the transmission spectrum. The sensitivity is reported as 8333 nm/[RIU] for the ...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Calculation of fuel burnup and radionuclide inventory for the HEU and potential LEU fuels in the IRT research reactor
Publication date: Available online 5 October 2018Source: Results in PhysicsAuthor(s): Saadou Aldawahrah, S. Dawahra, K. Khattab, G. Saba, M. BoushAbstractThe study of core conversion of the IRT research reactor from the HEU to LEU fuels has been conducted in this paper. Fuel burnup, buildup of actinides and fission product inventory for the IRT research reactor with UO2-Al dispersion fuel for the various different uranium enrichments and the uranium density such as: (IRT-3M 90% 1.1 g/cm3, IRT-3M 36% 2.51 g/cm3, IRT-4M 19.75% 3.25 g/cm3, IRT-4M 19.75% 3.48 g/cm3, IRT-4M 19.75% 3.71 g/cm3) have been carried out using the GET...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Effect of heat treatment processes on the localized corrosion resistance of austenitic stainless steel type 301 in chloride/sulphate solution
Publication date: Available online 5 October 2018Source: Results in PhysicsAuthor(s): Roland Tolulope Loto, Cleophas Akintoye Loto, Idehai OhijeagbonAbstractThe effect of quenching and annealing heat treatment on the localized corrosion resistance of 301 austenitic steel in 2M H2SO4/0.75% - 2.25% NaCl was studied by potentiodynamic polarization, open circuit potential measurement and optical microscopy analysis. The corrosion rate of the quenched, annealed and untreated steel increased with increase in NaCl concentration. The quenched steel had the lowest corrosion rate values, followed by the annealed steel. Variation in ...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Characterising lateral capacitance of MNOSFET with localised trapped charge in nitride layer
Publication date: Available online 5 October 2018Source: Results in PhysicsAuthor(s): A.E. Atamuratov, Z.A. Atamuratova, A. Yusupov, A. GhaniAbstractThis paper discusses the limitations of scanning microscope to read localised charge and proposes a viable solution. A 2D simulation and characterisation of the capacitance-voltage (C-V) characteristics of the lateral source-base transition of metal-nitride-oxide-semiconductor field effect transistor (MNOSFET) with charge trapped in nitride layer is presented. It is shown that C-V dependence is changed after trapping the localised charge in nitride layer. The change depends on...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Tuning the optoelectronic and charge transport properties of 2,5-di(pyrimidin-5-yl)thieno[3,2-b]thiophene by oligocene end cores substitution
Publication date: Available online 5 October 2018Source: Results in PhysicsAuthor(s): Ahmad Irfan, Aijaz Rasool Chaudhary, Shabbir Muhammad, Abdullah G. Al-Sehemi, Hu Bo, Muhammad Waseem Mumtaz, Muhammad Abdul QayyumAbstractWith the focus on tuning the charge transport and optoelectronic properties, various new derivatives were designed by substituting the oligocene moieties at end cores of 2,5-di(pyrimidin-5-yl)thieno[3,2-b]thiophene (Comp.1). The end core substitution effect of benzene, naphthalene, anthracene, tetracene, pentacene and hexacene on Comp.1 was comprehensively studied on the structure-property relationship,...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Properties comparison of high density polyethylene composites filled with three kinds of shell fibers
Publication date: Available online 5 October 2018Source: Results in PhysicsAuthor(s): Qingfa Zhang, Yukang Li, Hongzhen Cai, Xiaona Lin, Weiming Yi, Jibing ZhangAbstractThe extrusion method was applied to prepare composites with peanut husk, rice husk and walnut shell based on high density polyethylene (HDPE) and the properties of the three composites was compared and analyzed in this study. It was found that compared with peanut husk/HDPE composite and walnut shell/HDPE composite, whether mechanical strength or creep resistance, the rice husk/HDPE composite was the best. Moreover, the basic characterization of the three c...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Highly birefringent, low loss single-mode porous fiber for THz wave guidance
Publication date: Available online 5 October 2018Source: Results in PhysicsAuthor(s): KM Samaun Reza, Bikash Kumar Paul, Kawsar AhmedAbstractIn this letter, authors have proposed a circular structured photonic crystal fiber for low-loss terahertz wave guiding. Transmission characteristics of the photonic crystal fiber (PCF) have been conducted by implementing a perfectly matched layer (PML) in the boundary using finite element method. Power transmitted through the core has been improved by tuning the geometries of the core air holes. The proposed design at the porosity of 80% and diameter of 304 µm has reported a ver...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Characteristics of an on-chip polariton successively filtered circuit
Publication date: December 2018Source: Results in Physics, Volume 11Author(s): J. Ali, N. Pornsuwancharoen, P. Youplao, I.S. Amiri, R.R. Poznanski, K. Chaiwong, S. Punthawanumt, S. Suwanarat, P. YupapinAbstractPolaritonic signal processing model and manipulation using a microring successive filtering circuit are proposed. The polariton signals are generated by the coherent light within the microring embedded a gold nanograting island, from which the successive filtering of the polariton signals within the designed on-chip circuit is manipulated by adjusting the device end reflection coefficients. The almost closed system o...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Resistance factor calculations for LRFD of driven piles based on setup effects
Publication date: December 2018Source: Results in Physics, Volume 11Author(s): Xiaoya Bian, Zhijun Xu, Jun ZhangAbstractSetup effects, one of a large number of uncertainties in geotechnical engineering, can strongly enhance the bearing capacity (ultimate resistance) of driven piles after initial installation, especially for ultimate shaft resistance. Based on load and resistance factor design (LRFD) principle and the reliability theory, this paper incorporates the setup effects to propose a methodology for separately calculating the resistance factors for ultimate base and shaft resistance for reliability-based design (RBD...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Dual photoacoustic monitoring in laser ablation synthesis of silver nanoparticles to find in situ their fluence threshold formation
In this study, a dual pulsed photoacoustic technique was applied to monitor, in real time, the laser ablation synthesis in solution (LASiS) of silver nanoparticles. It was found that, at low optical fluence values, the ultrasound signal associated to the laser ablation process exhibited constant amplitude, independently of the ablation time. Further analysis confirmed that, under these conditions, the ablation process provided only suspended micro-sized Ag fragments. However, fluence values above 400 mJ cm−2 promoted the formation of nanoparticles, accompanied by amplitude changes in the photoacoustic signal. Det...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Characterization on stress-strain behavior of ferrite and austenite in a 2205 duplex stainless steel based on nanoindentation and finite element method
Publication date: December 2018Source: Results in Physics, Volume 11Author(s): Ping Tao, Jian-ming Gong, Yan-fei Wang, Yong Jiang, Yang Li, Wei-wei CenAbstractThe stress-strain behavior of ferrite and austenite in a commercial 2205 duplex stainless steel was investigated by using nanoindentation test and microstructure-based finite element method (FEM). Results showed that the optimum load range for measuring phase properties in nanoindentation test was from 3000 μN to 7000 μN. The ferrite has slightly higher average elastic modulus than austenite, while austenite has higher average nanohardness than ferrite. Rep...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Radioactivity effect on the shape of even-even nuclei for uranium and thorium series
Publication date: December 2018Source: Results in Physics, Volume 11Author(s): Huda A. Marid, Naz T. Jarallah, Hameed M. AbduljabbarAbstractThe purpose of present work is to study the relationship of the deformed shape of the nucleus with the radioactivity of nuclei for (Uranium-238 and Thorium-232) series. To achieve our purposes we have been calculated the quadruple deformation parameter (β2) and the eccentricity (e) and compare the radioactive series with the change of the (β2) and (e) as indicator for the changing in the nucleus shape with the radioactivity.To obtain the value of quadruple deformation paramet...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

Three levels of propagation of the Four-wave mixing signal
Publication date: December 2018Source: Results in Physics, Volume 11Author(s): J.L. Paz, Ysaias J Alvarado, Luis Lascano, Cesar Costa-VeraAbstractIn this work, we analyze different levels of propagation of the Four-wave mixing signal in a strongly driven two-level system when the stochastic effects of the thermal bath, are considered. First approximation level, given by an analytical solution valid only for constant pump intensity along the optical path; a second approximation level as an analytical solution valid for a lineal variation of the pump intensity, and finally, a third level as numerical solution, which represen...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research

The effect of dual substitution of Na and Al on ionic conductivity of Na0.5Bi0.5TiO3 ceramics
Publication date: December 2018Source: Results in Physics, Volume 11Author(s): W.G. Wang, X.Y. Li, T. Liu, G.L. HaoAbstractThe Na and Al dual substitution Na0.5Bi0.5TiO3 samples were synthesized by the conventional solid-state reaction method. The oxygen ion conductivity and migration in the Na0.54Bi0.46Ti1−xAlxO2.96−x/2 (x = 0.02, 0.04, 0.06 and 0.08) samples were investigated. The grain conductivity and relaxation activation energy of the Na0.54Bi0.46Ti1−xAlxO2.96−x/2 samples show the trend of declining-rising-declining with the increase of Al-doped content. The highest grain conductivity can ...
Source: Results in Physics - October 5, 2018 Category: Physics Source Type: research