The aim of this study was to device in house a suitable absorption filter for colorimetric analyses. An absorption filter was so constructed using 40% CuSO4.5H2O solution in 8M HCl (w/v) in glass support of 2mm internal diameter. The filter was found to have a nominal wavelength of 540±0.92nm, spectral bandwidth of 41±0.82nm and a peak transmittance of 36±0.40%. The filter offered a sensitivity...

Previously, it has been demonstrated that resonantcavity-enhanced separate-absorption-and-multiplication (SAM) avalanche photodiodes (APD’s) can achieve high bandwidths and high gain–bandwidth products while maintaining good quantum efficiency. In this paper, we describe a GaAs-based resonant-cavity-enhanced SAM APD that utilizes a thin charge layer for improved control of the electric field pr...

High Performance Absorption Algorithms for Terminological Reasoning in Description Logics

This paper elucidates the energy transfer and conversion processes in near-field thermophotovoltaic (TPV) systems, considering local radiation absorption and photocurrent generation in the TPV cell. Radiation heat transfer in a multilayered structure is modeled using the fluctuation–dissipation theorem, and the electric current generation is evaluated based on the photogeneration and recombinat...

Optical metrics relating to metallic absorption in representative plasmonic systems are surveyed, with a view to developing heuristics for optimizing performance over a range of applications. We use the real part of the permittivity as the independent variable; consider strengths of particle resonances, resolving power of planar lenses, and guiding lengths of planar waveguides; and compare near...

The purpose of this study was to investigate the relationship between work engagement, academic optimism, and teacherschr('39') job performance. To achieve this goal, the descriptive-correlational research method was used. The statistical population of the study consisted of 4830 elementary teachers in Karaj in the 2017-18 school year. The sample consisted of 350 individuals who were selected a...

The exemplary mechanical performance and durability of ultra-high performance concrete (UHPC) has led to its rapid emergence as an advanced cementitious material. The uncharacteristically high mechanical strength and ductility of UHPC makes it a promising potential material for defense structures which may be subject to highly dynamic loads like impact or blast. However, the mechanical response...

A 23 GHz Ge/SiGe multiple quantum well electroabsorption waveguide modulator is demonstrated with 10 dB extinction ratio (ER). 9 dB ER is achieved with 1V swing with energy consumption limited to 108 fJ per bit. Keywords-component; Quantum-confined Stark effect, Ge/SiGe, multiple quantum well modulators