Browsing Research Centers by Title
Now showing items 139-158 of 624
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Daily Stressors and Marital Interactions Affect Diurnal Cortisol and Alpha-Amylase Rhythm in Spouses of Persons with Mild Cognitive Impairment
(Virginia Tech, 2011)Research aims: 1. To document daily symptoms and behaviors of persons with MCI 2. To assess how MCI-related symptoms, care needs and other stressors influence psychological well-being of care partners 3. To examine effects ... -
Deck wrapped around tree trunk in snow
(Virginia Tech. Digital Library and Archives; Virginia Tech. University Libraries. Special Collections Department, 2005-01-06) -
Defect and adsorbate induced ferromagnetic spin-order in magnesium oxide nanocrystallites
(AIP Publishing, 2012-05-01)We report the correlation between d(0) ferromagnetism, photoluminescence (PL), and adsorbed hydrogen (H-) species in magnesium oxide (MgO) nanocrystallites. Our study suggests that the oxygen vacancies, namely singly ionized ... -
Development and Analysis of a Spiral Theory-based Cybersecurity Curriculum
(2017-01-09)Enhance cybersecurity learning experiences of students at Virginia Tech’s large engineering program -
Development of Recyclable and High-Performance In Situ Hybrid TLCP/Glass Fiber Composites
(MDPI, 2020-08-24)By combining the concepts of in situ thermotropic liquid crystalline polymer (TLCP) composites and conventional fiber composites, a recyclable and high-performance in situ hybrid polypropylene-based composite was successfully ... -
Diffusion of muonic atoms
(American Physical Society, 1988-10)Transport of muonic hydrogen and deuterium atoms in gaseous hydrogen and deuterium is studied in the diffusion approximation and by means of the multiple-collision expansion. The diffusion coefficient is derived. Numerical ... -
Direct and converse effect in magnetoelectric laminate composites
(AIP Publishing, 2011-06-01)In this letter, we analyze the direct and converse effect in laminate composites of magnetostrictive and piezoelectric materials. Our results deterministically show that direct magnetoelectric (ME) effect is maximized at ... -
Discovery and ramifications of incidental Magnéli phase generation and release from industrial coal-burning
(Nature Publishing Group, 2017-01-12)Coal, as one of the most economic and abundant energy sources, remains the leading fuel for producing electricity worldwide. Yet, burning coal produces more global warming CO2 relative to all other fossil fuels, and it is ... -
Distributed Storage Systems with Secure and Exact Repair - New Results
(IEEE, 2014-02)Distributed storage systems (DSS) in the presence of a passive eavesdropper are considered in this paper. A typical DSS is characterized by 3 parameters (n, k, d) where, a file is stored in a distributed manner across n ... -
Double helical conformation and extreme rigidity in a rodlike polyelectrolyte
(Nature Publishing Group, 2019-02-18)The ubiquitous biomacromolecule DNA has an axial rigidity persistence length of ~50 nm, driven by its elegant double helical structure. While double and multiple helix structures appear widely in nature, only rarely are ... -
Dual-phase self-biased magnetoelectric energy harvester
(AIP Publishing, 2013-11-01)We report a magnetoelectric energy harvester structure that can simultaneously scavenge magnetic and vibration energy in the absence of DC magnetic field. The structure consisted of a piezoelectric macro-fiber composite ... -
Dynamical Properties of Postural Control in Obese Community-Dwelling Older Adults
(MDPI, 2018-05-24)Postural control is a key aspect in preventing falls. The aim of this study was to determine if obesity affected balance in community-dwelling older adults and serve as an indicator of fall risk. The participants were ... -
Ear Deformations Give Bats a Physical Mechanism for Fast Adaptation of Ultrasonic Beam Patterns
(American Physical Society, 2011-11-14)A large number of mammals, including humans, have intricate outer ear shapes that diffract incoming sound in a direction-and frequency-specific manner. Through this physical process, the outer ear shapes encode sound-source ... -
Economic Impacts of Virginiais Natural Gas Industries
(Virginia Tech. Virginia Center for Coal and Energy Research., 1995-09)This study estimates the contributions of the natural gas industries to Virginia's economy. Activities covered by this study include the production of natural gas and associated products from wells in southwestern Virginia, ... -
Effect of intensive and extensive loss factors on the dynamic response of magnetoelectric laminates
(AIP Publishing, 2010-11-01)We report the correlation between intensive and extensive losses in piezoelectric materials with the frequency dependent response of layered magnetoelectric (ME) composites. Three different piezoelectric compositions were ... -
Effects of Virginia Coalfield Employment Enhancement Tax Credit Legislation
(Virginia Tech. Virginia Center for Coal and Energy Research., 1996-03)Coal mining is the major industry in Virginia's far southwestern counties. Coal transportation supports employment in other parts of the state. In 1995, the Virginia General Assembly passed, and the Governor signed, ... -
Elderly & Disabled Waiver Services: Development of the Client Satisfaction Survey-Short Forms
(Virginia Department of Medical Assisstance Services, 2005-04)This report is an addendum to an earlier report, Elderly & Disabled Waiver Services: Results of a Statewide Client Survey. Since the study’s distribution, further development and analysis of the Client Satisfaction Survey ... -
Elderly & Disabled Waiver Services: Provider Survey, Executive Summary
(Virginia Department for Medical Assistance Services; The Centers for Medicare and Medicaid, 2003-03) -
Elderly & Disabled Waiver Services: Results of a Statewide Client Satisfaction Survey
(Virginia Department of Medical Assisstance Services, 2004-10)As part of a “Real Choice Systems Change” grant received by the Virginia Department of Medical Assistance Services, the Center for Gerontology at Virginia Tech conducted a statewide survey of clients receiving personal ... -
Elderly & Disabled Waiver Services: Utilization Review Summary Report
(Virginia Department of Medical Assisstance Services, 2004-03): As part of Virginia’s Real Choice Systems Change Grant (July 20, 2001), the Center for Gerontology at Virginia Tech is responsible for Goal 4: “Address gaps in quality assurance and client satisfaction for community-based ...
