A5009743811- Semiconductor Quantum Structures and Devices
- Semiconductor Lasers and Optical Devices
- Spectroscopy and Laser Applications
- Advanced Semiconductor Detectors and Materials
- Sleep and Work-Related Fatigue
- Photonic and Optical Devices
- Laser Design and Applications
- Sleep and related disorders
- Sleep and Wakefulness Research
- Solid State Laser Technologies
- Occupational Health and Performance
- Ergonomics and Musculoskeletal Disorders
- Chalcogenide Semiconductor Thin Films
- Electronic and Structural Properties of Oxides
- Atmospheric Ozone and Climate
- Human-Automation Interaction and Safety
- Photonic Crystals and Applications
- EEG and Brain-Computer Interfaces
- Thermal Radiation and Cooling Technologies
- Quantum Dots Synthesis And Properties
- Health and Conflict Studies
- Electroconvulsive Therapy Studies
- Advanced Optical Sensing Technologies
- solar cell performance optimization
- Nanowire Synthesis and Applications
State University of New York
2014-2024
Stony Brook University
2015-2024
DEVCOM Army Research Laboratory
2011-2022
Ames Research Center
2021
Washington State University Spokane
2011-2021
Hebrew University of Jerusalem
2018
Florida State University
2018
National High Magnetic Field Laboratory
2018
Texas A&M University
2018
Walter Reed Army Institute of Research
1998-2015
SUMMARY Daytime performance changes were examined during chronic sleep restriction or augmentation and following subsequent recovery sleep. Sixty‐six normal volunteers spent either 3 ( n = 18), 5 16), 7 9 h 16) daily time in bed (TIB) for days (restriction/augmentation) followed by with 8 TIB (recovery). In the 3‐h group, speed (mean fastest 10% of responses) on psychomotor vigilance task (PVT) declined, PVT lapses (reaction times greater than 500 ms) increased steadily across restriction....
Sleep is essential for optimal health. The American Academy of Medicine (AASM) and Research Society (SRS) developed a consensus recommendation the amount sleep needed to promote health in adults, using modified RAND Appropriateness Method process. summarized here. A manuscript detailing conference proceedings evidence supporting final statement will be published SLEEP Journal Clinical Medicine.
The negative effects of sleep deprivation on alertness and cognitive performance suggest decreases in brain activity function, primarily the thalamus, a subcortical structure involved attention, prefrontal cortex, region subserving alertness, higher‐order processes. To test this hypothesis, 17 normal subjects were scanned for quantifiable changes during 85 h using positron emission tomography (PET) 18 Fluorine‐2‐deoxyglucose ( FDG), marker regional cerebral metabolic rate glucose (CMRglu)...
Sleep is essential for optimal health. The American Academy of Medicine (AASM) and Research Society (SRS) developed a consensus recommendation the amount sleep needed to promote health in adults, using modified RAND Appropriateness Method process. summarized here. A manuscript detailing conference proceedings evidence supporting final statement will be published SLEEP Journal Clinical Medicine.
The American Academy of Sleep Medicine and Research Society recently released a Consensus Statement regarding the recommended amount sleep to promote optimal health in adults. This paper describes methodology, background literature, voting process, results for consensus statement. In addition, we address important assumptions challenges encountered during process. Finally, outline future directions that will advance our understanding need place duration broader context health.
Positron emission tomography was used to measure cerebral activity and evaluate regional interrelationships within visual cortices their projections during rapid eye movement (REM) sleep in human subjects. REM associated with selective activation of extrastriate cortices, particularly the ventral processing stream, an unexpected attenuation primary cortex; increases blood flow areas were significantly correlated decreases striate cortex. Extrastriate also concomitant limbic paralimbic...
The American Academy of Sleep Medicine and Research Society recently released a Consensus Statement regarding the recommended amount sleep to promote optimal health in adults.This paper describes methodology, background literature, voting process, results for consensus statement.In addition, we address important assumptions challenges encountered during process.Finally, outline future directions that will advance our understanding need place duration broader context health.
Chronic sleep deprivation is common among workers, and has been associated with negative work outcomes, including absenteeism occupational accidents. The objective of the present study to characterize reciprocal relationships between work. Specifically, we examined how impacts performance affects in individuals not at-risk for a disorder; assessed outcomes disorders, insomnia, obstructive apnea (OSA) restless legs syndrome (RLS); characterized impairments shift workers (SW) disorders...
We studied the effects of sleep deprivation on executive functions using a task battery which included modified Sternberg task, probed recall and phonemic verbal fluency task. These tasks were selected because they allow dissociation some important processes from non-executive components cognition. Subjects randomized to total condition or control condition. Performance was assessed at baseline, after 51 h (or no in group), following 2 nights recovery sleep, fixed time day (11:00). also...
Summary As both military and commercial operations increasingly become continuous, 24‐h‐per‐day enterprises, the likelihood of operator errors or inefficiencies caused by sleep loss and/or circadian desynchrony also increases. Avoidance such incidents requires timely application appropriate interventions – which, in turn, depend on ability to measure monitor performance capacity individuals operational environment. Several factors determine potential suitability candidate measures, including...
Minority carrier lifetime and interband absorption in midinfrared range of spectra were measured InAs/GaSb strained-layer superlattices (SLSs) grown by molecular beam epitaxy on GaSb substrates. The 200-period undoped 7 ML InAs/8 SLS with AlSb confinement layers was determined time-resolved photoluminescence (PL) from analysis PL response to sinwave-modulated excitation. Study kinetics frequency domain allowed for direct measurements the excess concentration level 3.5×1015 cm−3. minority 80...
In <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</sub> Ga xmlns:xlink="http://www.w3.org/1999/xlink">1-x</sub> As xmlns:xlink="http://www.w3.org/1999/xlink">y</sub> Sb xmlns:xlink="http://www.w3.org/1999/xlink">1-y</sub> thermophotovoltaic (TPV) diodes were grown lattice matched to GaSb substrates by metal-organic vapor phase epitaxy in the bandgap range of EG = 0.5 0.6 eV. InGaAsSb TPV diodes, utilizing front-surface spectral control...
Minority carrier lifetime, τ, in type-2 strained-layer superlattices (SLSs) and long-wave Hg0.78Cd0.22Te (MCT) was measured by optical modulation response technique. It shown that at 77 K radiative recombination can contribute to the τ values. The Shockley–Read–Hall (SRH) lifetimes were attained as 100 ns, 31 more than 1 μs for midwave infrared superlattices, (LWIR) MCT correspondingly. nature of difference between SRH LWIR superlattice is discussed.