A5024076386- Photochemistry and Electron Transfer Studies
- Air Quality and Health Impacts
- Atmospheric aerosols and clouds
- Meteorological Phenomena and Simulations
- Vehicle emissions and performance
- Molecular Junctions and Nanostructures
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Air Quality Monitoring and Forecasting
- Luminescence and Fluorescent Materials
- Crystallography and molecular interactions
- Atmospheric and Environmental Gas Dynamics
- Quantum Dots Synthesis And Properties
- HIV/AIDS Research and Interventions
- bioluminescence and chemiluminescence research
- Solar Radiation and Photovoltaics
- LGBTQ Health, Identity, and Policy
- Material Dynamics and Properties
- Sexuality, Behavior, and Technology
- Energy and Environment Impacts
- Atmospheric chemistry and aerosols
- Brain Metastases and Treatment
- Adolescent Sexual and Reproductive Health
- Advanced Aircraft Design and Technologies
- Near-Field Optical Microscopy
Crescent University
2024
Duke University
2023-2024
University of Michigan
2017-2020
Lewis & Clark College
2017-2020
Clark University
2019
Boston University
2019
University of Washington
2009-2017
Seattle University
2011
New York University
2010
University of New Mexico
2006
HIV prevalence remains high among men who have sex with (MSM) in the United States, yet majority of research has focused on MSM as individuals, not dyads, and discussed risks primarily context casual sex. Nexus is an online prevention program that combines home-based testing couples counseling (CHTC). It allows partners dyadic relationships to receive care comfort their designated residence, via video-based chat. By using technologies (eg, VSee video chat), male support from a remote...
Transgender and gender nonconforming people experience some of the highest human immunodeficiency virus (HIV) rates in United States, many structural behavioral barriers that may limit their engagement HIV testing, prevention, care. Evidence suggests transgender youth (TY) are especially vulnerable to acquiring HIV, yet there is little research on TY few services targeted towards care for this population. Telehealth presents an opportunity mitigate accessing allowing engage testing...
The photoluminescence intermittency (PI) exhibited by single emitters has been studied for over a decade. To date, the vast majority of PI analyses involve parsing data into emissive and non-emissive events, constructing histograms event durations, fitting these to either exponential or power law probability distributions functions (PDFs). Here, new method analyzing is presented where are used directly construct cumulative distribution function (CDF), maximum-likelihood estimation techniques...
Clinical empathy has been studied in a number of health-care disciplines suggesting that higher practitioner leads to improved patient health and wellness outcomes. While some aspects the physical therapist–patient relationship have described, evidence quantitative assessment clinical therapists is scarce. To investigate level self-reported its practice environment workplace engagement, Jefferson Scale Empathy-Health Provider version (JSE-HP) Oldenburg Burnout Inventory (OLBI) were used....
The variation in dielectric constant is measured for thin films of poly(methyl methacrylate) (PMMA) and poly(vinylidene fluoride) (PVDF) using confocal fluorescence microscopy. Spatial the local polymer on ∼250 nm length scale solvochromatic emission from incorporated nile red (NR) at "quasi-single molecule" (10–7 M) true single molecule (SM) concentrations (10–9 M). Correlation NR wavelength maximum with used to transform images NR's maxima spatial constant. We demonstrate that...
The environment and temperature-dependent photoluminescence (PL) intermittency or "blinking" demonstrated by single violamine R (VR) molecules is investigated in two environments: poly(vinyl alcohol) (PVOH) crystals of potassium acid phthalate (KAP). In addition, temperatures ranging from 23 °C to 85 are studied, spanning the glass-transition temperature PVOH (T(g) = 72 °C). PL exhibited VR analyzed using probability histograms emissive non-emissive periods. both KAP, these best fit a power...
The dependence of single-molecule photoluminescence intermittency (PI) or "blinking" on the local dielectric constant (ε) is examined for nile red (NR) in thin films poly(vinylidene fluoride) (PVDF). In previous studies, variation was accomplished by studying luminophores chemically and structurally different hosts. contrast, NR/PVDF guest-host pair allows investigation PI as a function ε while keeping chemical composition both luminophore host unchanged. solvatochromic properties NR are...
The excited-state decay kinetics of single 2',7'-dichlorofluorescein (DCF) molecules oriented and overgrown within crystals potassium acid phthalate (KAP) are reported. Time-correlated single-photon counting measurements (TCSPC) 56 DCF in KAP reveal that single-exponential is exhibited by roughly half the molecules. remainder demonstrates complex well fit a stretched exponential function consistent with dispersed kinetics. Histograms single-molecule luminescence energies revealed...
The connection between photoluminescence (PL) intermittency and excited-state kinetics is explored for 2′,7′-dichlorofluorecin (DCF) isolated in crystals of potassium acid phthalate (KAP) using time-tagged, time-resolved, time-correlated single-photon counting (T3R-TCSPC). In this technique, PL or "blinking" measured conjunction with the time photon arrival relative to photoexcitation, allowing correlation emissive intensities decay single molecules. blinking trace parsed into nonemissive...
The role of proton transfer in the photoluminescence intermittency (PI) single molecules violamine R (VR) overgrown potassium acid phthalate (KAP) crystals is evaluated comparisons protonated and deuterated (DKAP) mixed between 23 60 °C. PI analyzed by construction cumulative distribution functions that are statistically compared. We find on- off-interval duration distributions change with isotopic substitution consistent contributing to VR. have distinct temperature dependencies different...
We investigated the viability of particle bound 1-nitropyrene (1-NP) air concentration measurements as a surrogate diesel exhaust (DE) exposure, compared with industry-standard elemental carbon (EC) and total (TC) measurements. Personal exposures are reported for 18 employees at large underground metal mine during four different monitoring campaigns. Full-shift personal exposure sampling was conducted using Mine Safety Health Administration (MSHA) compliant particulate matter (DPM) impactor...
The fluorescence intermittency or blinking of violamine R (VR) in poly(vinyl alcohol) (PVA) is measured for temperatures spanning the glass-transition temperature (Tg) polymer host. Probability distributions on- and off-time durations are acquired analyzed ranging from 22.5 °C (Tg − 49 °C) to 85 + 13 °C). At all temperatures, probability well described by a power-law. on-time power-law exponent (mon) undergoes modest increase with temperature, (moff) varies little temperature. Both...
A new method for reliably measuring longitudinal relaxation rates severely hyperfine-shifted NMR signals in aqueous solutions is presented. The illustrated a well-defined cobalt tetracysteinate, with relevance to cobalt-substituted metalloproteins. measurements are indicative of asymmetric electronic the high-spin Co(II) ion.
We develop a new approach that resolves cloud area distributions of single-layer shallow cumuli from ground-based observations. Our simple and computationally inexpensive uses images obtained Total Sky Imager (TSI) complementary information on base height provided by lidar measurements to estimate equivalent diameter (CED) over wide range sizes (about 0.01–3.5 km) with high temporal resolution (30 s). illustrate the feasibility our comparing estimated CEDs those derived collocated coincident...
We develop a new climatology of the macrophysical properties single-layer shallow cumuli (ShCu), such as cloud amount and base/top heights, observed during 19 summers (2000-2018) at Atmospheric Radiation Measurement (ARM) Program's Southern Great Plains (SGP) Central Facility in northern Oklahoma, USA. Similar to established datasets, incorporates well-known advantages narrow field-of-view (FOV) lidar-radar measurements resolve vertical structure clouds along wind direction. In contrast...
Sexually transmitted infections (STIs) are on the rise in United States, and adolescent girls (15-19 years old) more susceptible to acquiring STIs than their male peers. The co-occurrence of alcohol use sexual risk taking contribute significantly STI acquisition. Mobile health (mHealth) interventions ideally suited for our target population have demonstrated increases testing young people, as well reductions use.This pilot study used both qualitative quantitative methods explore views (age...
Abstract Background: Despite treatment with trastuzumab-based therapy, up to half of patients HER2+ advanced/metastatic breast cancer (MBC) will develop brain metastases (BrM). First-line therapy for advanced MBC remains a taxane, trastuzumab, pertuzumab (TP) which demonstrates poor permeability. Isolated relapse stable or absent extracranial disease clinical problem in both the adjuvant (Untch et al., ESMO 2019 Congress) and metastatic settings (Noteware Breast Cancer Res Treat. 2023)....