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Evaluation of Plateau Burning Behavior in HTPB-AP-Al Composite Propellants

Luiz Eduardo Nunes Almeida、Rene Gonçalves、José Atílio Fritz Fidel Rocco 等 5 位作者2020-08-17AIAA Propulsion and Energy 2020 Forum

The design of solid rocket motors is considered relatively dominated technology in the various areas of knowledge. Even so, there are variables that still need to be better explored. Therefore, the topic presented in this work is related to problems found in designs of HTPB-AP-AL based solid rocket motors that are rel…

Energetic Materials and CombustionThermal and Kinetic AnalysisRocket and propulsion systems research

Optical activity and excitation of surface plasmon polaritons with electromagnetically induced chiral media

Rafi Ud Din、Shaoliang Zhang、Manzoor Ikram 等 5 位作者2020-08-17Journal of the Optical Society of America B

Chiral materials possess some unusual properties for which they have attracted tremendous interest in recent research. In this paper, we discuss the interaction of electromagnetic fields with an initially isotropic material, making it anisotropic chiral by inducing magnetoelectric cross coupling. We consider a four-le…

Gold and Silver Nanoparticles Synthesis and ApplicationsMetamaterials and Metasurfaces ApplicationsPlasmonic and Surface Plasmon Research

3D Printed Immobilized Biocatalysts for Conversion of Methane

Jennifer M. Knipe2020-08-17OpenAlex

Biocatalysis may offer a cost-efficient solution to convert the problematic methane emissions to methanol or other liquid products that are both easy to transport and have considerable market value. This chapter highlights recent progress in whole-cell and isolated enzyme immobilization strategies with emphasis on tho…

biodegradable polymer synthesis and properties3D Printing in Biomedical ResearchInnovative Microfluidic and Catalytic Techniques Innovation

Equipment, materials and research methods

Denis A. Romonov、Stanislav V. Moskovskii、В. Е. Громов2020-08-17OpenAlex

The choice of M00 brand copper for the substrate material on which coatings for electrical purposes was applied is due to the fact that it includes a set of properties that determine a large area of its application in the electrical industry. These are such properties: high heat sink rate into volume of the material,…

Injection Molding Process and PropertiesMaterial Selection and PropertiesEngineering and Material Science Research

Modeling of Pulsed Fission Fuel Target Compression and Expansion

Kevin Schillo、B. G. Taylor、Robert B. Adams 等 4 位作者2020-08-17AIAA Propulsion and Energy 2020 Forum

Economically viable fusion reactors may be made possible through the utilization of magneto-inertial fusion (MIF) concepts. One of the major challenges faced by MIF is the standoff distance of reactor hardware, which may be solved with plasma liners. This study explores the parameter space for a magnetized target of d…

Laser-Plasma Interactions and DiagnosticsFusion materials and technologiesNuclear Materials and Properties

Nuclear Thermal Rocket Engine with a Toroidal Aerospike Nozzle

Kyle J. Stewart、Periklis Papadopoulos、Jordan Pollard2020-08-17AIAA Propulsion and Energy 2020 Forum

The following article describes the coupling of a nuclear thermal rocket engine with a toroidal aerospike nozzle. This coupling consists of two approaches to design. The first of these approaches being the top-level systems and subsystems analysis and design for the new engine. The second being the analysis and charac…

Nuclear reactor physics and engineeringNuclear Materials and PropertiesCombustion and Detonation Processes

Wendy Lee Queen

Bethany Halford2020-08-17C&EN Global Enterprise

Wide open spaces have always been a draw to explorers, and molecular prospector Wendy Lee Queen is no exception. Queen, a materials chemist at the Swiss Federal Institute of Technology, Lausanne (EPFL), has staked her claim on the vast frontier offered by metal-organic frameworks (MOFs). By filling this landscape with…

Metal-Organic Frameworks: Synthesis and ApplicationsDendrimers and Hyperbranched PolymersCovalent Organic Framework Applications

SK and Goodenough to work on batteries

Michael McCoy2020-08-17C&EN Global Enterprise

The South Korean chemical and battery maker SK Innovation will work with two University of Texas at Austin professors—2019 Nobel laureate in chemistry John Goodenough and Hadi Khani—on a gel-polymer electrolyte for lithium-metal batteries. Lithium-metal anodes increase energy density in electric-vehicle batteries but…

Advanced Battery Materials and TechnologiesPolyoxometalates: Synthesis and ApplicationsCatalysis and Hydrodesulfurization Studies

MRI Process Improvement

V Puneethraj2020-08-17International Journal for Research in Applied Science and Engineering Technology

With the remarkable increase in image processing for discussing medical imaging is one of the budding fields and the desires for advancements in medical imaging is always developing and challenging. MRI based brain medical imaging are used for medical diagnosis given that it show the internal portions of the human bra…

Fault Detection and Control SystemsMachine Learning in Materials ScienceNuclear Physics and Applications

Purification and crystallisation of SARS-CoV-2 nsp13 helicase

J.A. Newman2020-08-17Zenodo (CERN European Organization for Nuclear Research)

This document describes in detail the purification and crystallisation of nsp13 helicase from SARS-CoV-2

Enzyme Structure and Functionthermodynamics and calorimetric analyses

Identification of virgin martensite in quenched microstructures of new generation of forging steels with higher silicon content using colour etching

Štěpán Jeníček、Ivan Vorel、Michal Peković2020-08-17MANUFACTURING TECHNOLOGY

Observation and identification of products of transformation of austenite during austempering, Q-P processing, or quenching and tempering are often challenging. The reason is that the resulting microstructures are typically very fine and provide insufficient contrast between microstructural components. Their analysis…

Microstructure and Mechanical Properties of SteelsMetallurgy and Material FormingMetal Alloys Wear and Properties

Momentive to close silicone raw material plant

Michael McCoy2020-08-17C&EN Global Enterprise

As part of a major corporate overhaul, the silicone maker Momentive Performance Materials plans to shut its basic chemicals plant in Waterford, New York, leaving Dow as the only US producer of the key raw materials needed to produce silicone fluids, sealants, and elastomers. Momentive says the shutdown will take place…

Spacecraft Design and TechnologyGraphite, nuclear technology, radiation studies

Characterization of the Melt Layer of Ammonium Perchlorate Single Crystals

Monique McClain、Morgan Ruesch、Ryan J. Tancin 等 6 位作者2020-08-17AIAA Propulsion and Energy 2020 Forum

Given that many solid rocket motors and missiles rely on the combustion of ammonium perchlorate (AP) composite propellant, it is important to understand the combustion process of the propellant. Since the combustion of AP propellant itself is a complex heterogeneous process, there have been numerous studies in the pas…

Energetic Materials and CombustionCrystallization and Solubility StudiesChemical Analysis and Environmental Impact

Elements of an Inductive Electrical Power Conversion System for Fusion-Class Plasmas

Nathan Schilling、Jason Cassibry、Robert B. Adams2020-08-17AIAA Propulsion and Energy 2020 Forum

Fusion propulsion system hold promise for reducing trip times to various interplanetary destinations. However, due to the high-energies involved in these systems, they are often used in a pulsed, as opposed to a steady-state, configuration. Additionally, a significant amount of power needs to be generated in between p…

Magnetic confinement fusion researchFusion materials and technologiesCold Fusion and Nuclear Reactions

A Novel Approach for Noise Rejection and Partial Discharge Identification in Electric Drives for Aerospace

Peter Cheetham、Matthew Bosworth、Gian Carlo Montanari 等 5 位作者2020-08-17AIAA Propulsion and Energy 2020 Forum

Aerospace electrification has to go through significant innovations regarding adjustable speed drives, which are needed to increase specific power and effectiveness of propulsion and power control systems. This involves electrical insulation design with high-electric field and, therefore, increased risk of accelerated…

High voltage insulation and dielectric phenomenaPower Transformer Diagnostics and InsulationElectrostatic Discharge in Electronics

Methane Conversion on Single-Atom Catalysts

Xiao Yan Liu、Hua Liu、Aiqin Wang2020-08-17OpenAlex

The single-atom catalysts (SACs) have been emerging as an emerging technique since it was firstly proposed in 2011 by Qiao et al. for the Cobalt oxidation. By literature review, it turned out that the base metal SACs for the methane to methanol (MTM) reaction were mainly focusing on iron and copper SACs in frameworks,…

Electrocatalysts for Energy ConversionCatalytic Processes in Materials ScienceCatalysis and Oxidation Reactions

A modified Allen-Cahn model for pattern synthesis on surfaces

Lorina Dascal、Gautam Pai、Ron Kimmel2020-08-17arXiv (Cornell University)

We propose an extension of the Allen-Cahn model for pattern synthesis on two dimensional curved surfaces. This model is based on a single PDE and it offers improved ability of controlling the type of generated surface patterns via the chosen reaction-diffusion coefficient, thus, obtaining patterns in form of spots, in…

Aluminum Alloy Microstructure PropertiesSolidification and crystal growth phenomenaBlock Copolymer Self-Assembly

Emergence of dielectric anisotropy of crystalline Strontium Titanate due to temperature-dependent phase transitions

Zijun C. Zhao、Maxim Goryachev、Jerzy Krupka 等 4 位作者2020-08-17arXiv (Cornell University)

We have undertaken precision measurements of permittivity of single crystal Strontium Titanate from 294.6 K to 5.6 K by measuring the frequency of multiple microwave transverse electric and magnetic resonant modes. Compared with conflicting results reported previously, we unequivocally show that the permittivity has a…

Ferroelectric and Piezoelectric MaterialsMultiferroics and related materialsSolid-state spectroscopy and crystallography

Statistical Analysis of Oxidative Coupling of Methane in Membrane Reactors

M. Kalyani2020-08-17International Journal of Engineering Research and

Statistical Analysis of Oxidative Coupling of Methane in Membrane Reactors - written by M. Kalyani , P. Chinmayi , P. Meena published on 2020/08/17 download full article with reference data and citations

Catalytic Processes in Materials ScienceCatalysis and Oxidation Reactions

Peculiarities of electronic structure and composition in ultrasound milled silicon nanowires

E. V. Parinova、Alexandra K. Pisliaruk、Alexander Schleusener 等 11 位作者2020-08-17Results in Physics

The combined X-ray absorption and emission spectroscopy approach was applied for the detailed electronic structure and composition studies of silicon nanoparticles produced by the ultrasound milling of heavily and lowly doped Si nanowires formed by metal-assisted wet chemical etching. The ultrasoft X-ray emission spec…

Silicon Nanostructures and PhotoluminescenceNanowire Synthesis and ApplicationsAnodic Oxide Films and Nanostructures