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Nano NiO photo catalyst was synthesized by sol gel method and it is used as a photo catalyst in conjunction with 355 nm laser radiation in the process of disinfecting water infected with Escherichia coli microorganism. When synthesized nano-NiO material is used as a photo catalyst, a bacteria decay rate constant of 0.35 min-1 and this rate constant is higher than the bacteria decay rate constant of...
Arsenate ion will enrich near the electrode for the electric field effect. The paper uses the heterosexual electrode heterogeneous materials and heterosexual electrode homogeneous materials to remove arsenic in water. It can be found out through the experiments that the arsenic removal effect will differ significantly between the heterogeneous materials and homogeneous materials. A new method to remove...
CST is a new kind of vehicle passive safety device. In order to study the difference of CST for different weight vehicles, UG, VPG, LS-DYNA would be used to simulate and calculate, and it showed that influence of vehicle weight on CST shear fracture and blunt edge roundness is very great, this could provide a strong foundation for the study of CST on different vehicles, and also has great reference...
In this study, We are particularly interested in designing and analyzing chiral devices to quantify their shielding effectiveness as a function of frequency. The typical materials used for shielding are the copper, aluminium and steel. In order to do a comparative study between the different types of materials, the results obtained are presented. Due to chirality, there is magnetoelectric coupling...
Nanostructured organic solar cells join the advantages of bilayer devices and bulk heterojunction cells. They provide a wide interface area between the active materials and a direct path for carriers' collection. Furthermore, this architecture can also be advantageous in terms of light absorption. By means of FDTD simulations, we investigate light propagation (absorption and reflection) in nanostructured...
In the process of impinging dryness, surface convective heat transfer coefficient is one of the most important parameters of effecting dryness effectiveness. It is usually confirmed by testing, this paper, for film drying craftwork under impingement jet, gives the computational method of surface convective heat transfer coefficient, and analyses the effect of the three factors, which are the difference...
Photo darkening (PD) of ytterbium co-doped silica fibers are experimentally investigated and a numeric model for PD is proposed. The spectral response of PD is discussed based on a chemical bond formation model.
The use of nanophotonic structures creates novel opportunities for energy transfer. We present a design of photon-based thermal rectifier that enables near uni-directional photon heat flow. We also show that nanophotonic structures can achieve light trapping efficiency beyond the conventional Yablonovitch limit.
A new hybrid material solution has been developed for electromagnetic waves absorption based on a hierarchical architecture involving carbon nanotubes reinforced polymer foam inserted inside a metallic honeycomb structure. The honeycomb acts like a waveguide and improves the absorption up to 95% of the incident power near the cut-off frequency and delivers a high level of absorption above. Moreover,...
In this paper the material characterization at sub-millimetre wave frequencies facility recently developed at the European Space Research and Technology Centre (ESA-ESTEC) to complement existing antenna ranges is presented. By means of a Quasi Optical test bench, transmission/reflection measurements from 50 to 500 GHz are performed. Complex material parameters are then calculated from transmission...
This paper focuses on modeling diffraction phenomenon and its influence on electromagnetic wave predictions in subterranean galleries. A new approach to modeling diffraction is briefly mentioned along with basic parameters used for modeling. In order to show the influence of diffraction phenomena on simulation results, two typical subterranean galleries (a single bending corridor and a more complex...
In this paper, a thin planar electromagnetic absorber consisting of two lossy Frequency Selective Surface (FSS) layers is introduced. The layers are separated by foam material and they are backed by the ground plane. Square rings and crossed dipoles are used in the design of these lossy layers. A wideband absorption characteristic is achieved for zero degrees of incidence angle which is the main point...
Experiments show that 1.55μm GaInNAsSb wells have improved gain-radiative current characteristics over 1.3 μm GaInNAs, one contributory factor being reduction in inhomogeneous broadening, raising the question whether Sb could bring benefits for 1.3μm devices.
The nonlinear response of silica-gold-nanoshells (SGNS) in chloroform was studied at 1560nm, and an analytical approach that allowed extraction of the third- and the fifth-nonlinear susceptibility of a SGNS from the data is presented.
The aim of this study was to apply terahertz technology for screening and identification of drugs-of-abuse in mail. We have introduced terahertz spectral imaging and diffuse reflectance spectroscopy using our tunable THz parametric sources.
Plasmonic nanostructures were investigated for absorption enhancement of organic photovoltaic devices. Nanostructures were fabricated by scalable laser interference lithography. Experimental results agreed well with theoretical modeling.
Two-photon absorption properties of a (terpyridyl)osmium-(porphinato)zinc (OsPZnOs) are studied in bulk and waveguides. Integration of OsPZnOs (δ>1300GM) in waveguides showed enhanced nonlinear performance and potential for photonic applications.
We propose optical switch architecture based on transition metal oxide material. It use electrical field to change oxygen vacancy distribution and its optical property such as absorption coefficient. We demonstrate the absorption coefficient of such device can be latched in binary state, which is useful for optical networking and interconnect applications.
THz time domain spectroscopy reveals the existence of a broad absorption band owing to electromagnons in a multiferroic polycrystal of Sr3Co2Fe24O41. The absorption can be controlled by weak external magnetic fields.
The purpose of this work was to investigate the change of MIR characteristics of rice in storage using FT-IR/ATR spectroscopy. Firstly, grain number in the FT-IR/ATR measurement was examined to obtain the average spectral information of rice grain. In the experiment, measurement of 300 grains was performed and its spectrums were analyzed. As a result, it is shown that the average spectrum of rice...
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