Application of natural fibre composite in the aviation industry: a review

The evolution in aviation industry continues to evolve in this current era. The aviation industry is engaged in the research, development and manufacturing of flight vehicles. The critical item such as the propulsion systems, avionics system, operating and maintenance of flight vehicle are rigorously improved year by year. The interior components of aircraft are gaining serious attention in replacing the synthetic fibre with natural fibre composite material. The researchers conducted are mainly for civil, security and transportation. However, the focus on aircraft interior still immature and need further investigation. Therefore, this paper is reviewing the potential of natural fibre in the aviation industry

Hot methane line lists for exoplanet and brown dwarf atmospheres

We present comprehensive experimental line lists of methane (CH4) at high temperatures obtained by recording Fourier transform infrared emission spectra. Calibrated line lists are presented for the temperatures 300 - 1400 degC at twelve 100 degC intervals spanning the 960 - 5000 cm-1 (2.0 - 10.4 microns) region of the infrared. This range encompasses the dyad, pentad and octad regions, i.e., all fundamental vibrational modes along with a number of combination, overtone and hot bands. Using our CH4 spectra, we have estimated empirical lower state energies (Elow in cm-1) and our values have been incorporated into the line lists along with line positions (cm-1) and calibrated line intensities (S' in cm molecule-1). We expect our hot CH4 line lists to find direct application in the modeling of planetary atmospheres and brown dwarfs.Comment: Supplementary material is provided via the Astrophysical Journal referenc

Design and Analysis of Even-Positioned Cavity - Based Optical Amplification Device in Dielectric Metasurface

Recently, the development in the field of optical technology is exemplary, specifically relating to the design of the components necessary for optical integrated circuits. This research work investigates optical amplification action in a 2D Photonic Crystals (PhCs) structure with variable radius even-positioned PhC-cavity within its lattice. Twooptical signals are used, first acting as data signals coupled into the optical structure using the phenomenon of the Guided-mode-resonances (GMR) and the second one as a pump signal index-guided into the optical structure. The pump signal is used to amplify the data signal and the PhC-cavity is used for spectral tuning of the device operating in near-infrared (NIR) range. The dielectric structure consists of an optical waveguide packed in between the substrate and a cladding layer. The design and analysis of the proposed device is performed in a Finite-Difference-Time-Domain (FDTD) based open-source software package. The investigated results present optical amplific

Laplace Transform of Products of Bessel Functions: A Visitation of Earlier Formulas

This note deals with the Laplace transforms of integrands of the form ${x^\lambda }{J_\alpha }\left( {ax} \right){J_\beta }\left( {bx} \right)$, which are found in numerous fields of application. Specifically, we provide herein both a correction and a supplement to the list of integrals given in 1997 by Hanson and Puja, who in turn extended the formulas of Eason, Noble and Sneddon of 1956. The paper concludes with an extensive tabulation for particular cases and range of parameters