460 results match your criteria: "Air Force Institute of Technology[Affiliation]"

We fabricate nanolayer alumina capacitor and apply high electric fields, close to 1 GV m, to inject charges in the dielectric. Asymmetric charge distributions have been achieved due to the selectivity of the quantum tunneling process. Namely, the electrons near the Fermi level cannot tunnel intoregions near the cathode, where the total energy would be less than the potential energy.

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The effect of mixing and free-floating carrier media on bioaerosol release from wastewater: a multiscale investigation with .

Environ Sci (Camb)

January 2021

Air Force Institute of Technology, Environmental Engineering and Science Program, Department of Systems Engineering and Management, 2950 Hobson Way, Wright-Patterson AFB, OH, 45433, USA.

Aeration tanks in wastewater treatment plants (WWTPs) are significant sources of bioaerosols, which contain microbial contaminants and can travel miles from the site of origin, risking the health of operators and the general public. One potential mitigation strategy is to apply free-floating carrier media (FFCM) to suppress bioaerosol emission. This article presents a multiscale study on the effects of mixing and FFCM on bioaerosol release using spores in well-defined liquid media.

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This study evaluated the effect of two biocontaminant surrogates on the activity and performance of activated sludge. In the presence of bacteriophage MS2 at 3.2 × 10 PFU/ml, the peak respiration rates varied between 9.

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A framework for estimating the United States depression burden attributable to indoor fine particulate matter exposure.

Sci Total Environ

February 2021

Department of Systems Engineering and Management, Air Force Institute of Technology, Wright-Patterson AFB, OH 45433, USA; Military and Veteran Microbiome: Consortium for Research and Education (MVM-CoRE), Aurora, CO 80045, USA; Veterans Health Administration, Rocky Mountain Mental Illness Research Education and Clinical Center (MIRECC), Rocky Mountain Regional Veterans Affairs Medical Center (RMRVAMC), Aurora, CO 80045, USA; Department of Psychiatry and Neurology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA. Electronic address:

Recently published exploratory studies based on exposure to outdoor fine particulates, defined as particles with a nominal mean diameter less than or equal to 2.5 μm (PM) indicate that the pollutant may play a role in mental health conditions, such as major depressive disorder. This paper details a model that can estimate the United States (US) major depressive disorder burden attributable to indoor PM exposure, locally modifiable through input parameter calibrations.

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US military Veterans returned from Operation Enduring Freedom/Operation Iraqi Freedom/Operation New Dawn (OEF/OIF/OND) with symptoms associated with mild traumatic brain injury [mTBI; i.e., persistent post-concussive (PPC) symptoms] and posttraumatic stress disorder (PTSD).

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Charge trapping by iodine ions in photorefractive SnPS crystals.

J Chem Phys

October 2020

Azimuth Corporation, 2970 Presidential Drive, Suite 200, Fairborn, Ohio 45324, USA.

Electron paramagnetic resonance (EPR) is used to establish the role of iodine as an electron trap in tin hypothiodiphosphate (SnPS) crystals. Iodine ions are unintentionally incorporated when the crystals are grown by the chemical-vapor-transport method with SnI as the transport agent. The SnPS crystals consist of Sn ions and (PS) anionic groups.

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Micropolar pulsatile blood flow conveying nanoparticles in a stenotic tapered artery: NON-Newtonian pharmacodynamic simulation.

Comput Biol Med

November 2020

Department of Aeronautics and Astronautics, Air Force Institute of Technology, Wright Patterson Air Force Base, Dayton, OH, 45433, USA. Electronic address:

Two-dimensional rheological laminar hemodynamics through a diseased tapered artery with a mild stenosis present is simulated theoretically and computationally. The effect of different metallic nanoparticles homogeneously suspended in the blood is considered, motivated by drug delivery (pharmacology) applications. The Eringen micropolar model has been discussed for hemorheological characteristics in the whole arterial region.

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Nearly one-half of all construction projects exceed planned costs and schedule, globally [1]. Owners and construction managers can analyze historical project performance data to inform cost and schedule overrun risk-reduction strategies. Though, the majority of open-source project datasets are limited by the number of projects, data dimensionality, and location.

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Bioaerosol emissions from activated sludge basins: Characterization, release, and attenuation.

Sci Total Environ

January 2021

Air Force Institute of Technology, Environmental Engineering and Science Program, Department of Systems Engineering and Management, 2950 Hobson Way, Wright-Patterson AFB, OH 45433, USA. Electronic address:

This article presents a critical review of the peer-reviewed literature related to bioaerosol generation from activated sludge basins. Characterization techniques include a variety of culture- and nonculture-based techniques, each with unique features. Bioaerosols contain a variety of clinical pathogens including Staphylococcus saprophyticus, Clostridium perfringens, and Salmonella enteritidis; exposure to these microorganisms increases human health risks.

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Microbial Diversity and Community Structures Among Those With Moderate to Severe TBI: A United States-Veteran Microbiome Project Study.

J Head Trauma Rehabil

September 2021

Rocky Mountain Mental Illness Research Education and Clinical Center, Rocky Mountain Regional VA Medical Center, Aurora, Colorado (Drs Brenner, Stamper, Hoisington, Stearns-Yoder, Stanislawksi, Brostow, Hoffmire, Forster, Schneider, Postolache, and Lowry); Department of Physical Medicine and Rehabilitation (Drs Brenner, Stamper, Hoisington, Stearns-Yoder, Brostow, Hoffmire, Forster, and Lowry), Departments of Psychiatry and Neurology (Dr Brenner), Division of Biomedical Informatics and Personalized Medicine (Dr Stanislawksi), and Center for Neuroscience (Dr Lowry), University of Colorado Anschutz Medical Campus, Aurora, Colorado; Military and Veteran Microbiome: Consortium for Research and Education, Aurora, Colorado (Drs Brenner, Stamper, Hoisington, Stearns-Yoder, Brostow, Hoffmire, Forster, Schneider, Postolache, and Lowry); Department of Systems Engineering and Management, Air Force Institute of Technology, Wright-Patterson AFB, Ohio (Dr Hoisington); Mood and Anxiety Program, University of Maryland School of Medicine, and VISN 5 MIRECC, Department of Veterans Affairs, Baltimore, Maryland (Dr Postolache); and Department of Integrative Physiology, and Center for Neuroscience, University of Colorado Boulder, Boulder (Dr Lowry).

Objective: To evaluate the association between distal moderate/severe traumatic brain injury (TBI) history and the human gut microbiome.

Setting: Veterans Affairs Medical Center.

Participants: Veterans from the United States-Veteran Microbiome Project (US-VMP).

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Comprehensive Optical Strain Sensing Through the Use of Colloidal Quantum Dots.

ACS Appl Mater Interfaces

September 2020

Department of Electrical and Computer Engineering, Air Force Institute of Technology, Dayton, Ohio 45433, United States.

The adaptation of colloidal quantum dots loaded within a polymer for use in nondestructive testing can be used as an optical strain gauge due to the nanomaterial's strain sensing properties. In this paper, we utilized InP/ZnS colloidal quantum dots loaded within a polymer matrix applied onto the surface of a dog-bone foil precoated with an epoxy. By employing an empirical formula and a calibration factor, there is a propinquity between both the calculated optical strain and mechanical stress-strain reference data.

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The Tri-Service Microbiome Consortium (TSMC) was founded to enhance collaboration, coordination, and communication of microbiome research among U.S. Department of Defense (DoD) organizations and to facilitate resource, material and information sharing among consortium members.

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Laser-induced breakdown spectroscopy (LIBS) is a technique capable of portable, quantitative elemental analysis; however, quantitative isotopic determination of samples in situ has not yet been demonstrated. This research demonstrates the ability of LIBS to quantitatively determine concentrations of Li in solid samples of lithium hydroxide monohydrate in a nominally 40 mTorr argon environment using chemometrics. Three chemometric analysis techniques (principal component regression, partial least squares regression, and neural networks analysis) are applied to spectra collected using a spectrometer with modest resolving power (λ/Δλ ≈ 27 000).

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This study examines the organization and morphology of Bacillus globigii (BG) spores, a common surrogate for Bacillus anthracis, which were seeded and then recovered at various times from several points within a conventional, pilot-scale activated sludge system. Recovered BG spores were enumerated, microscopically examined, and tested for resistance to chemical (i.e.

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Internalizing symptoms are prevalent in students as they enter and complete college. Considering research suggesting mental health benefits of pet ownership, this study explores the relationship between pet ownership, social support (SS), and internalizing symptoms (IS) in a cohort of students across their 4-year college experience. With no differences at college entry, students growing up with pets had greater IS through the fourth year, and greater SS through the third year, than those without pets.

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Risk Framework for an Organizational System With Major Components.

Risk Anal

December 2020

Lawrence Livermore National Laboratory, Livermore, CA, USA.

Many large organizations accomplish their various functions through interactions across their major components. Components refers to functional entities within a large complex organization, such as business sectors, academic departments, or regional divisions. The dependency between the various components can cause risk to propagate through their overall system.

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We present partially coherent sources that are statistically twisted in the space-frequency and space-time domains. Beginning with the superposition rule for genuine partially coherent sources, we derive source plane expressions for the cross-spectral density (CSD) and mutual coherence functions (MCFs) for twisted space-frequency and space-time Gaussian Schell-model (GSM) beams. Using the Fresnel approximation to the free-space Green's function, we then paraxially propagate the CSD and MCF to any plane [Formula: see text].

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Drastic changes in electricity demand have been observed since March 2020 in Europe, after several countries implemented lockdown-like measures to contain the spread of COVID-19. We investigate the sensitivity of the electricity-water nexus in the European electric grid to large-scale behavior changes during the COVID-19 pandemic lockdown-like measures. We quantify changes in the blue virtual water trade between five European countries heavily affected by COVID-19 during the same period.

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Experimental studies reveal that the simultaneous addition of zinc dialkyl dithiophosphates (ZDDPs) and multi-wall carbon nanotubes (MWCNTs) to a poly-alpha-olefin base oil strongly reduces wear. In this paper, it is shown that MWCNTs promote the formation of an anti-wear (AW) layer on the metal surface that is much thicker than what ZDDPs can create as a sole additive. More importantly, the nanotubes' action is indirect, i.

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Introduction: Deployment-limiting medical conditions are the primary reason why service members are not medically ready. Service-specific standards guide clinicians in what conditions are restrictive for duty, fitness, and/or deployment requirements. The Air Force (AF) codifies most standards in the Medical Standards Directory (MSD).

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Article Synopsis
  • - This study analyzes how different lipid feedstocks affect yeast growth by comparing oil and glucose, finding that oil increases biomass yield and cell size but lowers protein content and enzyme levels for product synthesis.
  • - The research shows a distinct metabolic network operating during the simultaneous breakdown of sugars and fatty acids, allowing for better resource management without negative feedback on metabolism.
  • - A strain engineered for β-carotene production performed best in canola oil-containing yeast-peptone medium, producing significantly higher levels of β-carotene than in glucose-based mediums, showcasing the potential to use waste-derived lipids for valuable product synthesis.
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The aim of the study is to assess the effect of multi-walled carbon nanotubes (MWCNTs) on the wear behavior of MWCNT-doped epoxy resin. In this study, a laminating resin system designed to meet the standards for motor planes was modified with MWCNTs at mass fractions from 0.0 wt.

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A composite sensor consisting of two separate inorganic layers of Prussian blue (PB) and the composite of cerium oxide nanoparticles (CeNPs) and graphene oxide (GO), is tested with •OH radicals. The signals from the interaction between the composite layers and •OH radicals are characterized using cyclic voltammetry (CV). The degradation of PB in the presence of HO and •OH radicals is observed and its impact on the sensor efficiency is investigated.

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