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

In order to improve the performance of cement mortar (Portland cement), it was enriched with triclosan, hypochlorous acid, silver nanoparticles and graphene oxide. Cement mortar is used, among other things, to fill the gaps between the tiles of building porcelain stoneware. A number of structural, mechanical and biological tests were carried out.

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Article Synopsis
  • * Structural analyses were performed using advanced techniques like electron microscopy and laser emission spectroscopy to observe the properties of these aerosols.
  • * Results indicate that the inclusion of silver nanoparticles and hypochlorous acid significantly enhances the antibacterial effectiveness of the graphene oxide aerosols, leading to a more uniform distribution of graphene flakes.
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Recent Advances in Technologies for Phosphate Removal and Recovery: A Review.

ACS Environ Au

November 2024

Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45221, United States.

Article Synopsis
  • Phosphorus is a vital nutrient in fertilizers but is a nonrenewable resource, leading to concerns about depletion and environmental impact from agricultural runoff causing eutrophication.
  • Research has focused on methods for recovering phosphates from wastewaters, particularly through adsorption and chemical precipitation techniques.
  • The review highlights key experimental factors like temperature, pH, and the presence of other ions that affect the efficiency of phosphate recovery and provides insights into the characteristics of selected materials used in these processes.
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  • - This study explores how Hall current operates in Jeffrey fluid under various factors like radiative heat, convective boundary conditions, Joule heating, and Darcy dissipation, which are essential in applications like blood flow analysis and power generation.
  • - The analysis leads to the formulation of partial differential equations that describe the system dynamics, which are then simplified to ordinary differential equations using similarity variables, and investigated using the Galerkin weighted residual method.
  • - Findings indicate that Hall current influences fluid motion and heat dynamics, enhancing flow but reducing heat energy efficiency; additionally, Jeffrey fluid with higher relaxation time shows lower friction and heat transfer rates.
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Understanding the seasonal variations in the landfill leachate plumes (LLPs) properties and complex connections between concentrations of leachate variability, and its environment is essential for environmental and public health management. This study explores the combined electrical resistivity (ER) data and physiochemical water analysis (PWA) coupled with the excavations to monitor the landfill physiochemical properties (LPPs) due to seasonal variations and their implications on environmental vital organs and public health. The variations in ER and LLP distributions across the overburdened top layer due to seasonal changes were examined.

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Flight-by-feel (FBF) is an approach to flight control that uses dispersed sensors on the wings of aircraft to detect flight state. While biological FBF systems, such as the wings of insects, often contain hundreds of strain and flow sensors, artificial systems are highly constrained by size, weight, and power (SWaP) considerations, especially for small aircraft. An optimization approach is needed to determine how many sensors are required and where they should be placed on the wing.

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Bone and teeth are comprised of carbonate-substituted apatites with cationic substitutions, like sodium and potassium. Cations substitute for calcium in the apatite lattice but it is unclear whether they substitute for Ca(1) or Ca(2). Additionally, although we know that anionic substitutions affect the mineral mechanics, it is unclear how cationic substitutions affect mineral stiffness.

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Building on our strategic framework and operational model, we will discuss findings from our ethnographic study entitled, "The Impact of Catastrophic Injury Exposure on Resilience in Special Operations Surgical Teams (SOST)." Our goal is to establish that medical-martial creativity supports Special Operation Forces (SOF) medics' ability to fluidly modulate pressure amid real-time military medical decision-making in austere environments. We will use qualitative quotes to explore how SOST medics express medical-martial creativity in support of unconventional resilience.

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The demand for sustainable development goals and the absence of systematic development and organised exploration for gold has prompted this study to integrate magnetic and radiometric datasets with lithology to evaluate the gold mineralisation potential in the Ilesha schist belt. This study considers 3168.72 km of the Ilesha schist belt in southwestern Nigeria, a frontier belt for gold deposits.

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Analysis of Lithium Aging Using Machine Learning-Enhanced Spectroscopy Techniques.

Appl Spectrosc

August 2024

Office of Defense Nuclear Nonproliferation, National Nuclear Security Administration, Washington, District of Columbia, USA.

Lithium compounds such as lithium hydride (LiH) and lithium hydroxide (LiOH) have a wide range of industrial applications, but are highly reactive in environments with HO and CO. These reactions lead to the ingrowth of secondary lithium compounds, which can alter the homogeneity and affect the application of particular lithium chemicals. This study performed an exploratory analysis of different lithium compounds using laser-induced breakdown spectroscopy (LIBS) and Raman spectroscopy.

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Unlabelled: Plant-derived phytochemicals from medicinal plants are becoming increasingly attractive natural sources of antimicrobial and antiviral agents due to their therapeutic value, mechanism of action, level of toxicity and bioavailability. The continued emergence of more immune-evasive strains and the rate of resistance to current antiviral drugs have created a need to identify new antiviral agents against SARS-CoV-2. This study investigated the antiviral potential of balsaminol, a bioactive compound from , and its inhibitory activities against SARS-CoV-2 receptor proteins.

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Doum palm and turmeric are traditional medicinal plants with a rich history of use. This study investigated the phytochemical composition, proximate analysis, and GC-MS characterization of doum palm and turmeric blends at different ratios (100%, 80:20%, 60:40%, and 50:50%) using ethanol and warm-water extracts. Phytochemical screening revealed the presence of various bioactive compounds, including alkaloids, anthraquinones, flavonoids, glycosides, saponins, tannins, terpenoids, and phenols, in the blends at ratios of 80:20%, 60:40%, and 50:50%.

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Comparative life cycle assessment of remote potable water supply for the Department of Defense.

Sci Total Environ

November 2024

Earth Systems Predictability & Resiliency Group, Pacific Northwest National Laboratory, 902 Batelle Ave, Richland 99352, WA, United States of America. Electronic address:

The Department of Defense (DOD) and other agencies, including relief organizations, require potable water for remote missions around the globe. As part of recent initiative by the U.S.

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Utilizing a preliminary interatomic potential, this work represents an initial exploration into the thermomechanical behavior of NbCr solid solutions. Specifically, it examines the effect of different amounts of Cr solute, for which information in the literature is limited. The employed interatomic potential was developed according to the embedded atom model (EAM), and was trained on data derived from density functional theory calculations.

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Quantifying variation across 16S rRNA gene sequencing runs in human microbiome studies.

Appl Microbiol Biotechnol

June 2024

Veterans Health Administration, Rocky Mountain Mental Illness Research Education and Clinical Center (MIRECC) for Veteran Suicide Prevention, Rocky Mountain Regional Veterans Affairs Medical Center (RMRVAMC), Aurora, CO, USA.

Recent microbiome research has incorporated a higher number of samples through more participants in a study, longitudinal studies, and metanalysis between studies. Physical limitations in a sequencing machine can result in samples spread across sequencing runs. Here we present the results of sequencing nearly 1000 16S rRNA gene sequences in fecal (stabilized and swab) and oral (swab) samples from multiple human microbiome studies and positive controls that were conducted with identical standard operating procedures.

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This study involved direct doping of InO into silicon carbide (SiC) powder, resulting in 8.0 at% In-doped SiC powder. Subsequently, heating at 500 °C was performed to form a target, followed by the utilization of electron beam (e-beam) technology to deposit the In-doped SiC thin films with the thickness of approximately 189.

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This study investigates the motion of a test particle around triangular equilibrium points in the elliptic restricted three-body problem (ER3BP) under the influence of the two oblate and radiating primaries having Poynting-Robertson (P-R) drag. It is observed that the position of triangular points of the problem is affected by oblateness, radiation pressure, eccentricity, semi-major axis and Poynting-Robertson (P-R) drag. The stability of these points is demonstrated analytically by the Routh-Hurwitz criterion.

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The demand for lightweight aircraft structures has shifted from traditional metals like aluminum to composite materials such as carbon fiber reinforced polymers (CFRP) to achieve weight reduction. However, this transition has led to decreased lightning strike protection efficiency due to the dielectric nature of CFRP. To address this problem, two CFRP samples-one unprotected and the other shielded with carbon nanotube (CNT) sheets-were subjected to artificial lightning strike testing.

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Impact of Dilute Amounts of Fission Products on the Mechanical Behavior of Ni.

ACS Omega

April 2024

Department of Engineering Physics, Air Force Institute of Technology, Wright-Patterson Air Force Base, Ohio 45433, United States.

Fission products may interact with structural materials in various nuclear energy applications and cause their mechanical performance to deteriorate. Therefore, it is important to study the effects of different fission products on the mechanical properties of structural materials. In this work, nickel was chosen as a model structural material system and dilute amounts of uranium and fission product impurities X = (Tc, Te, Sb, Ce, Eu, and U) up to 4 at % were used.

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Recent alcohol intake impacts microbiota in adult burn patients.

Alcohol

August 2024

Veterans Health Administration, Rocky Mountain Mental Illness Research Education and Clinical Center (MIRECC) for Veteran Suicide Prevention, Rocky Mountain Regional Veterans Affairs Medical Center (RMRVAMC), Aurora, CO, USA; Department of Surgery, Division of GI, Trauma, and Endocrine Surgery, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; Graduate Program in Molecular Biology, University of Colorado Anschutz Medical Campus, Aurora, CO, USA; Veterans Health Administration, Eastern Colorado Health Care System, Rocky Mountain Regional Veterans Affairs Medical Center (RMRVAMC), Aurora, CO, USA; Alcohol Research Program, University of Colorado Anschutz Medical Campus, Aurora, CO, USA. Electronic address:

Alcohol use is associated with an increased incidence of negative health outcomes in burn patients due to biological mechanisms that include a dysregulated inflammatory response and increased intestinal permeability. This study used phosphatidylethanol (PEth) in blood, a direct biomarker of recent alcohol use, to investigate associations between a recent history of alcohol use and the fecal microbiota, short chain fatty acids, and inflammatory markers in the first week after a burn injury for nineteen participants. Burn patients were grouped according to PEth levels of low or high and differences in the overall fecal microbial community were observed between these cohorts.

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Article Synopsis
  • REBOA is a medical procedure used in emergencies to help control bleeding in seriously injured people, especially in trauma cases.
  • This study looked at 17 cases where REBOA was used in military settings between 2017 and 2019.
  • Most of the injured patients survived after getting treatment, with many having serious injuries mostly in the abdomen and limbs.
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