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Health Monitoring for Damage Initiation & Progression During Mechanical Shock in Electronic Assemblies
(2009-02-23)
Electronic products may be subjected to shock and vibration during shipping, normal usage and accidental drop. Highstrain rate transient bending produced by such loads may result in failure of fine-pitch electronics. Current ...
Heuristic Optimization Methods for the Characterization of Dynamic Mechanical Properties of Composite Materials
(2009-02-23)
Generally speaking, of the fundamental dynamic mechanical properties - mass, damping, and stiffness, damping is usually the most difficult to quantify. This is perhaps particularly true for composite materials which tend ...
Sample selection and reconstruction for array-based multispectral imaging
(2009-02-23)
In this work we address the problem of acquisition of multispectral
images in a sampled form and the subsequent processing of the
acquired signal. The problem is relevant in the context of color
imaging in digital ...
Static, Dynamic and Acoustical Properties of Sandwich Composite Materials
(2009-02-23)
Sandwich composite materials have been widely used in recent years for the construction of spacecraft, aircraft, and ships, mainly because of their high stiffness-to-weight ratios and the introduction of a viscoelastic ...
Non-metric Continua that support Whitney maps
(2009-02-23)
An example of a non-metric continuum is constructed, where every non-degenerate subcontinuum is non-metric, that supports a Whitney
map. Additional non-metric examples are given and examinations of conditions under which ...
Auto-Configuration in Multi-Hop Mobile Ad Hoc Networks
(2009-02-23)
As devices with wireless access technology, greater memory and longer battery life,
proliferate, there is a need to be able to allow more than one hop communication amongst
them. Also, such a network, with wireless enabled ...
Rechargeable Batteries Based on Specific Nonconjugated Conductive Polymers; Electrical, Optical and Structural Studies
(2009-02-23)
Rechargeable batteries based on specific nonconjugated conductive polymers have been studied and developed. Quadratic electro-optic effect and electron paramagnetic resonance characterization of a specific polymer was ...
Hydrothermal Syntheses, Structures, and Properties of New Iodate and Selenite Compounds of Transition Metals, Lanthanides, and Actinides
(2008-09-09)
Iodate and selenite anions possessing a nonbonding, but stereochemically active lone pairs of electrons, were selected as building blocks to produce new compounds with noncentrosymmetric structures, a prerequisite for ...
Development of a Biennial Review Procedure for Updating Liquidated Damage Rates Used in Construction Contracts
(2008-09-09)
This research effort sought to develop statistically justifiable means for developing a schedule of liquidated damage (LD) rates to be adopted by the Alabama Department of Transportation (ALDOT). The procedure outlined ...
The Utilization of Alternative Fuels in the Production of Portland Cement
(2008-09-09)
The production of portland cement converts many different raw materials into clinker, in the presence of temperatures on the order of 1,500 degrees Celsius. Historically, nonrenewable fossil fuels have been used to maintain ...