Quantum dynamics and nonclassical photon statistics of coherently driven Raman transition in bimodal cavity

We study a classically driven two-level system in a harmonic trap and a lossy two-mode cavity, with the first mode being resonant to the driving field and an electronic transition, and the second mode being off-resonant, forming a vibrational-assisted Raman transition. Using an exact numerical method, we compute the steady state as well as the time evolution of the photon statistics. We further investigate the photon correlations of both the cavity modes and identify the laser parameters and coupling strength that give the nonclassical sub-Poissonian property. The work is useful for coherent control of photon statistics and photon correlations in the trapped two-level system.     

Brain tumor segmentation using DE embedded OTSU method and neural network

Multidimensional Systems and Signal Processing - In the past few decades, medical imaging and soft computing have shown a symbolic growth in brain tumor segmentation. Research in medical imaging is...     

Comparative analysis of Change plasma and Junctionless Ferroelectric tunneling junction of VTFET for improved performance

Silicon - The effect of ferroelectric material at tunneling junction is compared for the two different configuration of Charge plasma and Junctionless of Vertical TFET structure. Various electrical...     

Influence of specimen geometry and size-effect on the <Emphasis Type="Italic">K</Emphasis><Subscript><Emphasis Type="Italic">R</Emphasis></Subscript>-curve based on the cohesive stress in concrete

Comparative study for determining the K _R -curves associated with the cohesive stress distribution for complete fracture process for two standard specimen geometries i.e., three-point bending test and compact tension test specimen geometries of concrete using analytical method and weight function approach is reported in the paper. The laboratory size specimen (100 ≤  D  ≤  400 mm) with initial-notch length/depth ratios 0.3 and 0.5 are considered in the investigation. The load-crack opening displacement curves for these specimens are obtained using well known version of Fictitious Crack Model (FCM). It is found from the numerical results that the weight function method improves computational efficiency without any appreciable error. The stability analysis on the K _R -curves and the influence of specimen geometry and the size-effect on the K _R -curves, the CTOD-curves and the process zone length during crack propagation of complete fracture process are also described.     

Experimental investigation on porosity and flexural strength of polymer parts fabricated by fused deposition modeling

Nowadays, polymer parts are fabricated by fused deposition modeling (FDM) techniques of additive manufacturing for biomedical, sports, and automotive applications. But, functional use of these parts in high-strength applications is limited due to anisotropic nature of the FDM process. Various researchers have proved that those process variables of FDM affect the mechanical properties of polymer parts. The present paper describes an experimental investigation of porosity and flexural strength of thermoplastic polymer (poly-lactic acid) parts fabricated by FDM. Influence of three process variables namely nozzle temperature, print speed, and raster width on porosity and flexural strength of parts is studied. Experiments are planned using a central composite design. Specimens are first weighed for density measurements and then tested using three-point flexural loading on a tensometer. It is found that all three process variables have a significant effect on porosity and flexural strength. Print speed is the most influential parameter for porosity, while raster width is the most significant parameter for flexural strength. Further, regressive models are developed to predict the responses. Also, microstructure of fractured specimens is studied using a scanning electron microscope. Optimization of process variables is performed to minimize porosity and maximize flexural strength using the desirability function approach.     

Analysis of ONOFIC Technique Using SiGe Heterojunction Double Gate Vertical TFET for Low Power Applications

Silicon - In this paper, a new technique ONOFIC is proposed and implemented for designing the SiGe heterojunction 2D double gate Vertical t-shaped TFET as an inverter circuit for low power...     

Structural and Microwave Properties of (Mg,Zn/Co)TiO3 Dielectric Ceramics

The structural and microwave properties of (Mg,Zn/Co)TiO₃ dielectric ceramics have been investigated. The grown samples have been characterized by means of x-ray diffraction, Rietveld refinement, scanning electron microscopy, and energy dispersive x-ray spectroscopy analysis. The microwave dielectric properties of grown samples have been measured using the Hakki-Coleman resonator method and found to depend on the ionic polarizability, electronic polarizability, and Mg-site substitutions. The Mg_0.95Zn_0.05TiO₃ compound shows a maximum Q × f value of 210,000 GHz (at 10 GHz), ?_r of 16.31, and τ_f value of ?62.43.     

Genetic Dissection of Seedling Root System Architectural Traits in a Diverse Panel of Hexaploid Wheat through Multi-Locus Genome-Wide Association Mapping for Improving Drought Tolerance

Cultivars with efficient root systems play a major role in enhancing resource use efficiency, particularly water absorption, and thus in drought tolerance. In this study, a diverse wheat association panel of 136 wheat accessions including mini core subset was genotyped using Axiom 35k Breeders’ Array to identify genomic regions associated with seedling stage root architecture and shoot traits using multi-locus genome-wide association studies (ML-GWAS). The association panel revealed a wide variation of 1.5- to 50-fold and were grouped into six clusters based on 15 traits. Six different ML-GWAS models revealed 456 significant quantitative trait nucleotides (QTNs) for various traits with phenotypic variance in the range of 0.12–38.60%. Of these, 87 QTNs were repeatedly detected by two or more models and were considered reliable genomic regions for the respective traits. Among these QTNs, eleven were associated with average diameter and nine each for second order lateral root number (SOLRN), root volume (RV) and root length density (RLD). A total of eleven genomic regions were pleiotropic and each controlled two or three traits. Some important candidate genes such as Formin homology 1, Ubiquitin-like domain superfamily and ATP-dependent 6-phosphofructokinase were identified from the associated genomic regions. The genomic regions/genes identified in this study could potentially be targeted for improving root traits and drought tolerance in wheat.