Liquid-liquid separation is a critically important process in the treatment of emulsions that can occur in our environment, such as oily stormwater, shipboard bilgewater, or off-shore oil spill treatment. Effective filtration systems, including coalescing filters, are essential for mitigating these environmental pollutants. Achieving this requires a comprehensive understanding of liquid-liquid interface dynamics influenced by additives and surfactants.
View Article and Find Full Text PDFBackground: COVID-19 significantly impacted physician assistant/associate (PA) education programs. Most programs transitioned didactic and clinical education from in-person to remote, and clinical training opportunities diminished. Graduates of accredited PA programs take the Physician Assistant National Certifying Examination (PANCE), a five-hour exam with 300 multiple-choice questions, and must attain or exceed the scaled passing score of 350 (range: 200-800).
View Article and Find Full Text PDFMicrometer-sized water droplets dispersed in diesel fuel are stabilized by the fuel's surface-active additives, such as mono-olein and poly(isobutylene)succinimide (PIBSI), making the droplets challenging for coalescing filters to separate. Dynamic material properties found from interfacial rheology are known to influence the behavior of microscale droplets in coalescing filters. In this work, we study the interfacial dilatational properties of water-in-fuel interfaces laden with mono-olein and PIBSI, with a fuel phase of clay-treated ultra-low sulphur diesel (CT ULSD).
View Article and Find Full Text PDFCoalescence of micrometer-scale droplets is impacted by several parameters, including droplet size, viscosities of the two phases, droplet velocity, angle of approach, as well as interfacial tension and surfactant coverage. The thinning dynamics of films between coalescing droplets can be particularly complex in the presence of surfactants, due to the generation of Marangoni stresses and reduced film mobility. Here, a microfluidic hydrodynamic "Stokes" trap is used to gently steer and trap surfactant-laden micrometer-sized droplets at the center of a cross-slot.
View Article and Find Full Text PDFIn conducting its practice analysis, the National Commission on Certification of Physician Assistants incorporated new approaches in 2015. Twelve groups of PAs identified knowledge, tasks, and skills required for practice not only in primary care, but also in 11 practice focus areas (specialties). In addition, a list of diseases and disorders likely to be encountered was identified for each specialty.
View Article and Find Full Text PDFJ Physician Assist Educ
September 2018
The PAEA End of Rotation™ exams were developed to assess medical knowledge of the 7 core supervised clinical practice experiences, including Emergency Medicine, Family Medicine, Internal Medicine, General Surgery, Pediatrics, Women's Health, and Psychiatry and Behavioral Health. The examinations were created by experienced PA educators and national exam experts with continual review and content updates. This paper summarizes changes since the inception of the exam program, including test construction and development, reliability, validity, and scale scoring.
View Article and Find Full Text PDFPurpose: The aim of this research was to compare different methods of calibrating multiple choice question (MCQ) and clinical decision making (CDM) components for the Medical Council of Canada's Qualifying Examination Part I (MCCQEI) based on item response theory.
Methods: Our data consisted of test results from 8,213 first time applicants to MCCQEI in spring and fall 2010 and 2011 test administrations. The data set contained several thousand multiple choice items and several hundred CDM cases.
This research provides a demonstration of the utility of mixture Rasch models (MRMs) for the analysis of survey data. Specifically, a framework based on a mixture partial credit model (MPCM) will be presented. MRMs are able to provide information regarding latent classes (subpopulations without manifest grouping variables) and separate item parameter estimates for each of these latent classes.
View Article and Find Full Text PDFJ Coll Physicians Surg Pak
November 2011
Amyloidosis is an idiopathic disease that is characterized by the extracellular deposition of fibrillar proteins. The disease can be categorized as primary or secondary where deposits occur in conjunction with chronic diseases such as rheumatoid arthritis or tuberculosis. The deposits can be localized or systemically distributed.
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