Focused ion beam (FIB) techniques are employed widely for nanofabrication and processing of materials and devices. However, ion irradiation often gives rise to severe damage due to atomic displacements that cause defect formation, migration, and clustering within the ion-solid interaction volume. The resulting restructuring degrades the functionality of materials and limits the utility of FIB ablation and nanofabrication techniques.
View Article and Find Full Text PDFHere, we investigated the brain functional connectivity (FC) changes following a novel accelerated theta burst stimulation protocol known as Stanford Neuromodulation Therapy (SNT) which demonstrated significant antidepressant efficacy in treatment-resistant depression (TRD). In a sample of 24 patients (12 active and 12 sham), active stimulation was associated with significant pre- and post-treatment modulation of three FC pairs, involving the default mode network (DMN), amygdala, salience network (SN) and striatum. The most robust finding was the SNT effect on amygdala-DMN FC (group*time interaction F(1,22) = 14.
View Article and Find Full Text PDFBackground: Currently, magnetic resonance spectroscopy (MRS) is dependent on the investigative team to manually prescribe, or demarcate, the desired tissue volume-of-interest. The need for a new method to automate precise voxel placements is warranted to improve the utility and interpretability of MRS data.
New Method: We propose and validate robust and real-time methods to automate MRS voxel placement using functionally defined coordinates within the prefrontal cortex.
Human papillomavirus (HPV) is the most prevalent sexually transmitted infection in the United States and oral healthcare providers (OHPs) have become increasingly focused on preventing oral health outcomes related to HPV through screening for oral cancer and recommending HPV vaccination. The purpose of this study was to explore the comfort of having HPV-related discussions with OHPs among a college-age population. Students enrolled in an introductory-level, personal health class at a large, public, mid-Atlantic institution were invited to participate in an anonymous survey.
View Article and Find Full Text PDFSpray coating is an industrially mature technique used to deposit thin films that combines high throughput with the ability to coat nonplanar surfaces. Here, we explore the use of ultrasonic spray coating to fabricate perovskite solar cells (PSCs) over rigid, nonplanar surfaces without problems caused by solution dewetting and subsequent "run-off". Encouragingly, we find that PSCs can be spray-coated using our processes onto glass substrates held at angles of inclination up to 45° away from the horizontal, with such devices having comparable power conversion efficiencies (up to 18.
View Article and Find Full Text PDFSelf-assembled monolayers (SAMs) are becoming widely utilized as hole-selective layers in high-performance p-i-n architecture perovskite solar cells. Ultrasonic spray coating and airbrush coating are demonstrated here as effective methods to deposit MeO-2PACz; a carbazole-based SAM. Potential dewetting of hybrid perovskite precursor solutions from this layer is overcome using optimized solvent rinsing protocols.
View Article and Find Full Text PDFMissed clinical opportunities and the lack of strong and consistent vaccine recommendations are key reasons for low HPV vaccination rates. The purpose of this study was to conduct a pilot evaluation of a web-based training's impact on knowledge, attitudes, and self-efficacy related to providing evidence-based HPV vaccine recommendations. Participants completed three online interactive learning modules and the ™ smartphone application (app).
View Article and Find Full Text PDFIntroduction Diltiazem is commonly used for the management of atrial fibrillation (AFIB) with rapid ventricular rate (RVR) in the emergency department (ED). Conflicting studies comparing the efficacy of diltiazem have led to various dosing strategies. The objective of this study was to investigate diltiazem administration in a community ED and determine the effect of varying doses on heart rate (HR) control, systolic blood pressure (SBP) and diastolic blood pressure (DBP).
View Article and Find Full Text PDFObjective: Depression is the leading cause of disability worldwide, and half of patients with depression have treatment-resistant depression. Intermittent theta-burst stimulation (iTBS) is approved by the U.S.
View Article and Find Full Text PDFHypnosis is associated with alterations in the sense of agency which can play a role in its utilization as a nonpharmacological option for pain management. The goal of the current study was to examine the relationships between responsiveness to suggestions in hypnosis and alterations of the sense of agency among patients with fibromyalgia. Ninety-eight participants with fibromyalgia underwent two hypnotizability assessments followed by the Sense of Agency Rating Scale.
View Article and Find Full Text PDFIon implantation underpins a vast range of devices and technologies that require precise control over the physical, chemical, electronic, magnetic and optical properties of materials. A variant termed "recoil implantation" - in which a precursor is deposited onto a substrate as a thin film and implanted via momentum transfer from incident energetic ions - has a number of compelling advantages, particularly when performed using an inert ion nano-beam [Fröch et al., Nat.
View Article and Find Full Text PDFThe purpose of this study was to evaluate a facilitated interactive role-playing activity on increasing human papillomavirus (HPV) vaccine recommendation skills for school nurses and school-based health center staff. A 1-day workshop was implemented for school-based clinicians focused on improving HPV vaccination rates in schools. The workshop included a facilitated interactive role-playing activity involving five scenarios related to recommending the HPV vaccine to parents.
View Article and Find Full Text PDFObjective: Scalable, deliberate practice training strategies to administer evidence-based recommendations are necessary to improve human papillomavirus (HPV) vaccination rates. We sought to characterize resident clinicians' perceptions regarding the usability of the HPV Vaccine: Same Way, Same Day smartphone application (app). Usability, a critical aspect of digital programs to promote behavior change, was evaluated.
View Article and Find Full Text PDFIntroduction: The Department of Defense (DoD) operates a large, multi-channeled physician accession pipeline to maintain a professional workforce of over 10,000 active duty physicians. The Uniformed Services University (USU) operates the nation's only federal medical school providing trained doctors to the Army, Navy, Air Force, and Public Health Service. Although the school serves an essential purpose, policymakers question the cost of operating the University's medical school.
View Article and Find Full Text PDFOver the past six years, researchers have investigated the use of spray coating to fabricate perovskite solar cells (PSCs), with the aim of demonstrating its viability as an industrial manufacturing process. This spotlight on applications outlines the key benefits of this coating technology and summarizes progress made to date, with attention focused on varied efforts to control the crystallization and uniformity of the perovskite layer. The emerging understanding of processes required to create smooth, dense spray-cast perovskite films has recently led to the demonstration of fully spray-cast PSCs with a power conversion efficiency of 19.
View Article and Find Full Text PDFThe development of scalable deposition methods for perovskite solar cell materials is critical to enable the commercialization of this nascent technology. Herein, we investigate the use and processing of nanoparticle SnO films as electron transport layers in perovskite solar cells and develop deposition methods for ultrasonic spray coating and slot-die coating, leading to photovoltaic device efficiencies over 19%. The effects of postprocessing treatments (thermal annealing, UV ozone, and O plasma) are then probed using structural and spectroscopic techniques to characterize the nature of the np-SnO/perovskite interface.
View Article and Find Full Text PDFWe use ultrasonic spray-coating to sequentially deposit thin films of tin oxide, a triple-cation perovskite and spiro-OMeTAD, allowing us fabricate perovskite solar cells (PSCs) with a champion reverse scan power conversion efficiency (PCE) of 19.4% on small-area substrates. We show that the use of spray-deposition permits us to rapidly (>80 mm s) coat 25 mm × 75 mm substrates that were divided into a series of devices each with an active area of 15.
View Article and Find Full Text PDFObjective: New antidepressant treatments are needed that are effective, rapid acting, safe, and tolerable. Intermittent theta-burst stimulation (iTBS) is a noninvasive brain stimulation treatment that has been approved by the U.S.
View Article and Find Full Text PDFDiamond is known to possess a range of extraordinary properties that include exceptional mechanical stability. In this work, it is demonstrated that nanoscale diamond pillars can undergo not only elastic deformation (and brittle fracture), but also a new form of plastic deformation that depends critically on the nanopillar dimensions and crystallographic orientation of the diamond. The plastic deformation can be explained by the emergence of an ordered allotrope of carbon that is termed O8-carbon.
View Article and Find Full Text PDFPituitary dysfunction with reduced growth hormone (GH) secretion is common in patients following traumatic brain injury (TBI), and these patients often develop chronic symptoms including fatigue and altered cognition. We examined 18 subjects with a history of mild TBI, fatigue, and insufficient GH secretion. Subjects received GH replacement in a year-long, double-blind, placebo-controlled, crossover study, and were assessed for changes in physical performance, body composition, resting energy expenditure, fatigue, sleep, mood, and neuropsychological status.
View Article and Find Full Text PDFDespite its prevalence and high disease burden, the pathophysiological mechanisms underlying chronic migraine (CM) are not well understood. As CM is a complex disorder associated with a range of sensory, cognitive, and affective comorbidities, examining structural network disruption may provide additional insights into CM symptomology beyond studies of focal brain regions. Here, we compared structural interconnections in patients with CM (n = 52) and healthy controls (HC) (n = 48) using MRI measures of cortical thickness and subcortical volume combined with graph theoretical network analyses.
View Article and Find Full Text PDFMigraine is a debilitating condition; however, the pharmacological effects on central nervous system networks after successful therapy are poorly understood. Defining this neurocircuitry is critical to our understanding of the disorder and for the development of antimigraine drugs. Using an established inflammatory soup model of migraine-like pathophysiology (N = 12) compared with sham synthetic interstitial fluid migraine induction (N = 12), our aim was to evaluate changes in network-level functional connectivity after sumatriptan-naproxen infusion in awake, conscious rodents (Sprague-Dawley rats).
View Article and Find Full Text PDFNumerous online HPV vaccine education interventions for clinicians have been created to improve HPV vaccinations rates. The aims for this study were to (1) assess the content of the purpose statements and learning objectives of online HPV vaccine continuing medical education (CME) activities developed for clinicians and (2) identify themes and gaps in the purpose statements and learning objectives. A content analysis was conducted of the purpose statements and learning objectives for each HPV vaccine online CME activity.
View Article and Find Full Text PDFACS Appl Mater Interfaces
November 2018
We use ultrasonic spray-coating to fabricate cesium-containing triple-cation perovskite solar cells with a power-conversion efficiency of up to 17.8%. Our fabrication route involves a brief exposure of the partially wet spray-cast films to a low vacuum, a process that is used to control film crystallization.
View Article and Find Full Text PDFDevelopment of scalable quantum photonic technologies requires on-chip integration of photonic components. Recently, hexagonal boron nitride (hBN) has emerged as a promising platform, following reports of hyperbolic phonon-polaritons and optically stable, ultra-bright quantum emitters. However, exploitation of hBN in scalable, on-chip nanophotonic circuits and cavity quantum electrodynamics (QED) experiments requires robust techniques for the fabrication of high-quality optical resonators.
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