Hydrostatic stress effect on the optical performance and the stress sensitivity of optical nonlinear waveguide

Sensitivity of optical parameters is a significant topic in developing optoelectronic devices. The stress sensitivity of nonlinear optical waveguides is closely related to hydrostatic stress. The hydrostatic stress can cause anisotropic and inhomogeneous distribution of the refractive index. In this paper analytical and numerical calculations are performed to study the effect of hydrostatic stress on the sensitivity of nonlinear optical waveguide sensors. The optical performance of the waveguide sensors under various hydrostatic stress states is also investigated. Transverse magnetic modes (TM) are considered in addition to transverse electric modes (TE) to study anisotropy. It is found that the value of the hydrostatic stress can change the value of the cutoff thickness. These changes may induce multimode. Moreover, the hydrostatic stresses influence the values of the stress sensitivity of the waveguide sensors and present

Numerical simulations of coarsening of lamellar structures: applications to metallic alloys

Understanding the microstructural evolution in metallic alloys helps to control their properties and improve their performance in industrial applications. The emphasis of our study is the coarsening mechanisms of lamellar structures

Grain Size Distribution and topological correlations During Ostwald Ripening: Monte Carlo Potts model simulation

Practically most polycrystalline materials such as ceramics are sintered by liquid during processing; for example, tungsten carbide applied for cutting tools. In liquid sintering, grain structure is controlled by Ostwald ripening. In this work, the Monte Carlo Potts model is employed to simulate Ostwald ripening in solid-liquid mixture. Based on the computer simulation

Solar cell with multilayer structure based on

In this study, a four-layer waveguide structure has been investigated as a solar cell model. In the proposed structure, a nanoparticle composite layer is added to enhance the efficiency of the solar cell due to their ability of controlling the light transmission and reflection. The nanoparticles are taken to be a mixture of Ag and Au embedded in a dielectric media consists of polyacrylic acid laid above a SiNx antireflection coating layer. Both layers are sandwiched between glass substrate and air cladding. The average reflectance for TE and TM fields are calculated using Maple. Results show that the reflectance depends on the ratio of the nanoparticle in the dielectric media, refractive index of SiNx layer and the angle of incidence. Thus, the performance of solar cell has been optimized by tuning and adjusting the above-mentioned parameters

Numerical modeling of microstructural evolution in three-phase polycrystalline materials

Most engineering alloys are used in polycrystalline form. This means that they are made of a large number of grains. The structure formed by the grains is not steady but evolves with time. Understanding the material's microstructure and its evolution helps to control the performance and lifetime of engineering materials. The simulation method based on the Monte Carlo–Potts model of microstructural evolution in a two-phase system has been extended to study microstructural evolution in a three-phase system. The model has been developed and characterized in this study. The model is verified by comparing simulation results of grain growth in the three-phase system to the simulation results in a two-phase system. It is found that grain growth is controlled by diffusion along grain boundaries and follows the power-growth relationship, d~ t 1/n with 1/n= ¼

Monte Carlo Implementation for Simulation of Ostwald Ripening Via Long Range Diffusion in Two-Phase Solids

Numerical simulations based on the Monte Carlo Potts model are used to study coupling of grain growth and Ostwald ripening in two-phase polycrystalline materials. The ratio of the grain boundary energy to the interphase boundary energy is used as an input parameter. It is shown that the grain growth in two-phase polycrystalline materials is controlled by long-range diffusion and the change of the mean grain size with time obeys the growth law, n= 0 n+ kt where n is the grain growth exponent. The value of n is calculated for a broad series of volume fractions. It is found that the inverse grain growth exponent, 1/n, in agreement with the theoretical value, 1/n= 1/3, noticed during computer simulations for volume fractions between 40% and 90%. However, the value of 1/n is smaller than 1/3 for volume fractions between 10% and 30%. Furthermore, the temporal development of the number of grains has been analyzed for the entire range of volume fractions. It is also seen that the quasi-stationary state is advanced at varied aging times depending on the volume fractions. Furthermore, it is shown that the simulated size distribution are symmetric and peaked at x= 1 for volume fractions differ between 50% and 90%; however, the simulated size distribution become asymmetric and skew to smaller grains for lower volume fractions change between 10% and 40%

All you need to know about publishing Social Inclusion Research in high-quality IS Journals?

This 90-minute PDS is organized and presented by SIG Social Inclusion with the goal of providing practical and meaningful guidance to scholars (at various stages of their careers) interested in pursuing and successfully publishing Social Inclusion research. Our goal is to dispel the perception many hold that Social Inclusion research is difficult to publish in top IS journals. The PDS will facilitate dialogue between scholars and journal editors to surface success factors and key requirements/attributes to publishing in highquality IS journals. The PDS outcome will be a summary of best practices and characteristics of effective interactions with top journals. Throughout the session, the PDS facilitators will conduct activities with the audience that will empower audience members to ask questions and leave with actionable steps they can use to enhance their social inclusion research. The session will conclude with Q&A with all panelists

A compact very wideband amplifying filter based on RTD loaded composite right/left-handed transmission lines

The composite right/left-handed (CRLH) transmission line (TL) is presented as a general TL possessing both left-handed (LH) and right-handed (RH) natures. RH materials have both positive permittivity and positive permeability, and LH materials have both negative permittivity and negative permeability. This paper aims to design and analyze nonlinear CRLH-TL transmission line loaded with resonant tunneling diode (RTD). The main application of this design is a very wideband and compact filter that amplifies the travelling signal. We used OrCAD and ADS software to analyze the proposed circuit. CRLH-TL consists of a microstrip line which is loaded with complementary split-rings resonators (CSRRs), series gaps, and shunt inductor connected parallel to the RTD. The designed structure possess a wide band that ranges from 5 to 10.5 GHz and amplifies signal up to 50 %. The proposed design is of