Thermokinetic Modeling in an Aerospace Research and Production Environment
Thermokinetic modeling has proven its value for measuring thermal response and reaction rates of a wide variety of aerospace materials.
Materials Literature
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Evaluation of meat quality traits from European pig production systems in relation to sustainability: an approach
International audience
Irradiation-assisted stress corrosion cracking of stainless steels in pressurized water reactor (PWR) environment
This work deals with the study of the irradiation assisted stress corrosion cracking. The purpose is to improve the understanding of irradiation effects on the mechanical behaviour of internal stainless steel structures in PWR environment. The aim is to identify the physical mechanisms responsible for plasticity and d…
Development of a 3D Surface Mapping System to Inspect Capsule Fill-Tube Assemblies used in Laser-Driven Fusion Targets
Abstract not provided
Prototype Radiation Detector Positioning System For The Automated Nondestructive Assay Of Uf6 Cylinders
International Atomic Energy Agency (IAEA) inspectors currently perform periodic inspections at uranium enrichment plants to verify UF6 cylinder enrichment declarations. Measurements are typically performed with handheld high-resolution sensors on a sampling of cylinders taken to be representative of the facility’s ent…
Polipropilen elyafın dispers boyarmaddeler ile boyanabilirliğinin geliştirilmesi için yeni bir yöntem: ultrasonik boyama
In this study, a new method to increase the disperse dyeability of polypropylene fibers was investigated. For this purpose, dye bath having liquors to good ratio of 20:1 and dye concentration of 2% owf has been prepared and fabrics from polypropylene fibers were dyed by using ultrasonic energy. These experiments were…
Damage of Cross-Linked Rubbers as the Scission of Polymer Chains: Modeling and Tensile Experiments, Report 1
This paper develops a damage model for unfilled cross-linked rubbers based on the concept of scission of polymer chains. The model is built up on the well-known Gent elastic potential complemented by a kinetic equation describing effects of polymer chain scission. The macroscopic parameters in the damage model are eva…
The application of the impulse approximation to the inelastic scattering of electrons by hydrogen atoms
A calculation of the ionization cross section and the excitation cross section to the 2S and 2P states of hydrogen by collision with electrons is carried through, using an impulse approximation. The results are then compared to the experimental results when available and to the various theoretical calculations. The cr…
GAS ADSORPTION SENSORS ON THE BASIS OF POROUS SILICON
The influence of hydrogen and methane adsorption on high frequency (1 MHz) conductivity and capacity of sensor structures based on porous silicon has been studied. An essential changing in electric parameters was registered as a function of partial gas pressure. It was calculated the adsorption sensitivity of porous s…
Observation of acoustic emission from gas bubble inception and burst
This technical note presents an experimental investigation aimed at exploring acoustic emission (AE) from gas bubble formation, motion, and destruction. AE in this particular investigation covers the frequency range between 100 and 1000 kHz. It is shown that AE energy and amplitude are directly correlated to bubble si…
Photochromic sculpture
In contrast to light-emitting displays like plasma display panels (PDPs) and liquid crystal displays (LCDs), color-forming displays like "E-Ink" which displays information by reflecting surrounding light are being actively researched as a technology that is easy on the eye and can even be applied in bright places such…
Large Enhancements in Optoelectronic Efficiencies of Nano-plastically Stressed Conjugated Polymer Strands
The photoluminescence (PL) of well dispersed molecules of a conjugated polymer, poly[2-methoxy-5-((2'-ethylhexyl)oxy)-1,4-phenylene-vinylene] (MEH-PPV), in an optically inert matrix manifested dramatic increases when the individual molecular strands were fully stretched. The PL increase rose with stretching and may re…
Mycobacterium tuberculosis NmtR Harbors a Nickel Sensing Site with Parallels to Escherichia coli RcnR
Mycobacterium tuberculosis NmtR is a Ni(II)/Co(II)-sensing metalloregulatory protein from the extensively studied ArsR/SmtB family. Two Ni(II) ions bind to the NmtR dimer to form octahedral coordination complexes with the following stepwise binding affinities: K(Ni1) = (1.2 ± 0.1) × 10(10) M(-1), and K(Ni2) = (0.7 ± 0…
Network Modeling of Gas Trapping and Mobility in Foam Enhanced Oil Recovery
Foam greatly reduces the mobility of gas in porous media, both by increasing the effective viscosity of the gas phase and by trapping a substantial fraction of the gas in place. Mechanistic models for foam mobility split the effect of foam into an effective viscosity and an effective relative permeability, which inclu…
Photochromic sculpture
In contrast to light-emitting displays like plasma display panels (PDPs) and liquid crystal displays (LCDs), color-forming displays like "E-Ink" which displays information by reflecting surrounding light are being actively researched as a technology that is easy on the eye and can even be applied in bright places such…
Supergrowth of Nitrogen-Doped Single-Walled Carbon Nanotube Arrays: Active Species, Dopant Characterization, and Doped/Undoped Heterojunctions
We demonstrate the water-assisted supergrowth of vertically aligned single-walled carbon-nitrogen nanotubes (SWNNTs) using a simple liquid/gas-phase precursor system. In situ characterization of gas-phase nitrogen-containing precursors and their correlation to growth identifies HCN as the most active precursor for SWN…
Lithiation-Induced Embrittlement of Multiwalled Carbon Nanotubes
Lithiation of individual multiwalled carbon nanotubes (MWCNTs) was conducted in situ inside a transmission electron microscope. Upon lithiation, the intertube spacing increased from 3.4 to 3.6 Å, corresponding to about 5.9% radial and circumferential expansions and ∼50 GPa tensile hoop stress on the outermost tube wal…
Nonlinear shear wave interaction at a frictional interface: Energy dissipation and generation of harmonics
Analytical and numerical modelling of the nonlinear interaction of shear wave with a frictional interface is presented. The system studied is composed of two homogeneous and isotropic elastic solids, brought into frictional contact by remote normal compression. A shear wave, either time harmonic or a narrow band pulse…
A comparative study of semiconductor-based plasmonic metamaterials
Recent metamaterial (MM) research faces several problems when using metal-based plasmonic components as building blocks for MMs. The use of conventional metals for MMs is limited by several factors: metals such as gold and silver have high losses in the visible and near-infrared (NIR) ranges and very large negative re…
Identities for density functionals linking functionals of different densities
In electron density functional theory formal properties of density functionals play an important role in constructing and testing approximate functionals. In this paper it is shown that a set of density functionals satisfy an equation that links functionals of densities of N and N-1 systems of the same Hamiltonian. In…