The definition for dielectric constant relates to the permittivity of the material (symbol use here ε). The permittivity expresses the ability of a material to polarise in response to an applied field. It is the ratio of the permittivity of the dielectric to the permittivity of a vacuum. Physically it means the greater the polarisation developed by a material in an applied field of given streng...

Dielectric barrier discharge (DBD) is an effective method to produce active species including ozone for remediation of pollutants in water, gas, etc. In the present work, a DBD type surface discharge system was utilised to degrade phenol in solutions. The influence of experimental conditions including solution pH values, initial concentration of phenol and applied voltage on the degradation rat...

Amino acids and peptides present in waste water may produce byproducts which are potentially unsafe and may lead to serious health and environmental problems. Removal of these parent compounds by the use of the environmentally benign oxidant can be of much use to the human kind and the environment. Degradation of these peptides can be done by the Oxidation of amino acid residues which is consid...

The aggressive down-sizing of device dimensions and voltage margins has left little room for transistor degradation, so in addition to dealing with PVT variations, a detailed understanding of numerous aging processes generally studied by device scientists is needed at the circuit and system levels. In this paper, we describe a number of circuit methods to efficiently monitor accelerated device ...

In microstrip patch antenna array, the mutual coupling is very critical due to surface wave excitation. It leads to degradation in radiation pattern and reduction in gain. In this paper, a method to mitigate mutual coupling effect in an antenna array using Slotted Ground Structure (SGS) at 900MHz and dielectric constant 2.2 is simulated and analyzed using Ansoft HFSS 13. Simulated results show ...

Optoelectronic components such as laser diodes and light-emitting diodes are vulnerable to electrostatic discharge (ESD) and electrical overstress (EOS). In this paper, we extensively study the size effect on ESD performance of buried heterostructure (BH) distributed feedback (DFB) InGaAsP/InP lasers. We show that the ESD threshold and degradation behavior of BH lasers are correlated with the c...

The characteristics of a typical 70nm high K gate dielectrics MOSFET with different source/drain structure including S/D lift-up structure are simulated by two dimensional device simulator. The impact of FIBL effect the gate dielectric permikttivity increasing to the characteristics of MOSFET is investigated. The simulation results shows that the degradation of MOSFET characteristics can be sup...

Vegetable oils used in frying food represent a social problem as its destination. The residual oil can be recycled and returned to the production line, as biodiesel, as soap, or as putty. The state of the residual oil is determined according to their physicochemical characteristics whose values define its economically viable destination. However, the physicochemical analysis requires high costs...

Irradiation effects of γ-radiation on the physical and electrical properties of polycarbonate (Makrofol-E) film has been studied to be able to investigate the dielectric response of irradiated polymers for a wide range of fluence and frequency. The dielectric constant (έ)The loss tangent ( tanδ ), dielectric loss factor (ε ̋), the a.c electrical conductivity (σ) and the relaxation time (τ), were...