1,140 research outputs found
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Precision LCVD System Design with Real Time Process Control
A Laser Chemical Vapor Deposition (LCVD) system was designed using a fixed 100
Watt C02 laser focused on a moveable substrate. Temperature and height measurement devices
monitor the reaction at the point of deposition to provide feedback for controlling the process.
The LCVD system will use rapid prototyping technology to directly fabricate fully threedimensional ceramic, metallic, and composite parts of arbitrary shape. Potential applications
include high temperature structures, electronic/photonic devices, and orthopaedic implants.Mechanical Engineerin
Tidal deformability of neutron stars with realistic equations of state and their gravitational wave signatures in binary inspiral
The early part of the gravitational wave signal of binary neutron star
inspirals can potentially yield robust information on the nuclear equation of
state. The influence of a star's internal structure on the waveform is
characterized by a single parameter: the tidal deformability lambda, which
measures the star's quadrupole deformation in response to the companion's
perturbing tidal field. We calculate lambda for a wide range of equations of
state and find that the value of lambda spans an order of magnitude for the
range of equation of state models considered.
An analysis of the feasibility of discriminating between neutron star
equations of state with gravitational wave observations of the early part of
the inspiral reveals that the measurement error in lambda increases steeply
with the total mass of the binary. Comparing the errors with the expected range
of lambda, we find that Advanced LIGO observations of binaries at a distance of
100 Mpc will probe only unusually stiff equations of state, while the proposed
Einstein Telescope is likely to see a clean tidal signature.Comment: 12 pages, submitted to PR
Xenoestrogens from Household Plastics Bind Estrogen Receptors and Affect Cell Proliferation
Xenoestrogens are “foreign” chemicals or compounds that interact with estrogen receptors as either agonists or antagonists to interfere with endocrine system function. Xenoestrogens include phytoestrogens, pesticides, industrial by- products and synthetic estrogens. In this study, consumer plasticware, including baby bottles and food storage containers, were found to release xenoestrogenic compounds that bound to ERα and ERβ and affected cell proliferation
Big Idea for a Big Challenge: Influencing Reproducibility on an Institutional Scale
To describe and evaluate the use of a library-sponsored national conference to influence institutional culture around reproducibility through awareness building
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Fabrication of Advanced Thermionic Emitters Using Laser Chemical Vapor Deposition-Rapid Prototyping 498
Laser Chemical Vapor Deposition-Rapid Prototyping (LCVD-RP) is a relatively new manufacturing process. Its capabilities are ideally suited for the manufacturing of a type of electron emitter called an integrated-grid thermionic emitter. The integrated-grid thermionic emitter is composed of wagon wheel-like structures of alternating layers of boron nitride and molybdenum on tungsten. The goal of this paper is to determine the feasibility of using LCVDRP technology to manufacture advanced thermionic emitters.Mechanical Engineerin
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