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https://www.readbyqxmd.com/read/29457923/flipping-social-determinants-on-its-head-medical-student-perspectives-on-the-flipped-classroom-and-simulated-patients-to-teach-social-determinants-of-health
#1
N Gostelow, J Barber, F Gishen, A Berlin
BACKGROUND: Inequalities in healthcare are increasing. Engaging medical students to tackle this urgent challenge alongside clinical sciences can be demanding. This study examines medical student perceptions of a flipped approach to health inequalities co-designed by faculty and sixth-year students. INNOVATION: A flipped learning session was piloted for year 4 medical students combining an online lesson followed by a tutorial with a simulated patient. METHODS: A mixed-methods approach collected questionnaire data using 4-point Likert scales and free text answers...
February 19, 2018: Medical Teacher
https://www.readbyqxmd.com/read/29457869/assessment-of-the-spectrum-of-hepatic-encephalopathy-a-multi-center-study
#2
Bradley Reuter, Kara Walter, Julien Bissonnette, Michael D Leise, Jennifer Lai, Puneeta Tandon, Patrick S Kamath, Scott W Biggins, Christopher F Rose, James B Wade, Jasmohan S Bajaj
Hepatic encephalopathy (HE) is a major cause of morbidity in cirrhosis. However its severity assessment is often subjective, which needs to be studied systematically. AIM: To determine how accurately trainee and non-trainee practitioners grade and manage HE patients throughout its severity. METHODS: We performed a survey study using standardized simulated patient videos at 4 US and 3 Canadian centers. Participants were trainees (gastroenterology/hepatology fellows) and non-trainees (faculty, nurse practitioners, physician assistants)...
February 19, 2018: Liver Transplantation
https://www.readbyqxmd.com/read/29457613/on-the-photocatalytic-cycle-of-water-splitting-with-small-manganese-oxides-and-the-roles-of-water-clusters-as-direct-sources-of-oxygen-molecules
#3
Kentaro Yamamoto, Kazuo Takatsuka
We theoretically studied the chemical principles behind the photodynamics of water splitting: 2H2 O + 4hν + M → 4H+ + 4e- + O2 + M. To comprehend this simple looking but very complicated reaction, the mechanisms of at least three crucial phenomena, among others, need to be clarified, each of which is supposed to constitute the foundation of chemistry: (i) charge separation (4H+ + 4e- ), (ii) the catalytic cycle for essentially the same reactions to be repeated by each of four photon absorptions with a catalyst M, and (iii) the generation of oxygen molecules of spin triplet...
February 19, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29457457/programming-hierarchical-self-assembly-of-patchy-particles-into-colloidal-crystals-via-colloidal-molecules
#4
Daniel Morphew, James Shaw, Christopher Avins, Dwaipayan Chakrabarti
Colloidal self-assembly is a promising bottom-up route to a wide variety of three-dimensional structures, from clusters to crystals. Programming hierarchical self-assembly of colloidal building blocks, which can give rise to structures ordered at multiple levels to rival biological complexity, poses a multiscale design problem. Here we explore a generic design principle that exploits a hierarchy of interaction strengths and employ this design principle in computer simulations to demonstrate the hierarchical self-assembly of triblock patchy colloidal particles into two distinct colloidal crystals...
February 19, 2018: ACS Nano
https://www.readbyqxmd.com/read/29456169/kinematics-of-lower-limbs-during-walking-are-emulated-by-springy-walking-model-with-a-compliantly-connected-off-centered-curvy-foot
#5
Hyerim Lim, Sukyung Park
The dynamics of the center of mass (CoM) during walking and running at various gait conditions are well described by the mechanics of a simple passive spring loaded inverted pendulum (SLIP). Due to its simplicity, however, the current form of the SLIP model is limited at providing any further information about multi-segmental lower limbs that generate oscillatory CoM behaviors and their corresponding ground reaction forces. Considering that the dynamics of the CoM are simply achieved by mass-spring mechanics, we wondered whether any of the multi-joint motions could be demonstrated by simple mechanics...
February 8, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29454231/influence-of-heading-perception-in-the-control-of-posture
#6
Alessandro Piras, Milena Raffi, Monica Perazzolo, Salvatore Squatrito
The optic flow visual input directly influences the postural control. The aim of the present study was to examine the relationship between visually induced heading perception and postural stability, using optic flow stimulation. The dots were accelerated to simulate a heading direction to the left or to the right of the vertical midline. The participants were instructed to indicate the perceived optic flow direction by making a saccade to the simulated heading direction. We simultaneously acquired electromyographyc and center of pressure (COP) signals...
February 10, 2018: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29452313/does-the-iliac-wing-influence-l5-pedicle-screw-fixation
#7
Hai-Ming Jin, Xue-Qin Bai, Xiang-Xiang Pan, Jianwei Wu, Cong-Cong Wu, Ying-Zhao Yan, Ke Wang, Ai-Ming Wu, Xiang-Yang Wang
OBJECTIVE: To explore whether the iliac wing influenced L5 PS fixation and to propose methods to reduce such influence. METHODS: A total of 100 computed tomography scans (from 50 males and 50 females) of the lower lumbar region and pelvis were obtained and three-dimensionally reconstructed. Cylinders with 6.5-mm diameters were drawn to simulate the different trajectories of L5 PSs. The maximum lengths and lateral angles of trajectories, and the vertical distances from the inner edge of the iliac wing to these trajectories, were measured...
February 13, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29451998/predicting-the-integrated-visual-field-with-wide-scan-optical-coherence-tomography-in-glaucoma-patients
#8
Masaaki Yoshida, Shiho Kunimatsu-Sanuki, Kazuko Omodaka, Toru Nakazawa
PURPOSE: This study aimed to calculate a predicted integrated visual field (IVF) based on predicted monocular visual fields (MVFs) derived, with a new method, from wide-scan optical coherence tomography (OCT) data. MATERIALS AND METHODS: Visual field testing used the central (6 × 4) 24 points of the Humphrey Field Analyzer 24-2 program. OCT scans of a corresponding retinal area, centered on the fovea, were divided into a 6 × 4 grid. The thickness of the macular retinal nerve fiber layer (mRNFL), ganglion cell layer + inner plexiform layer (GCIPL), and mRNFL + GCIPL (GCC) was measured in each grid area...
February 16, 2018: Current Eye Research
https://www.readbyqxmd.com/read/29451308/apheresis-buffy-coat-collection-without-photoactivation-has-no-effect-on-apoptosis-cell-proliferation-and-total-viability-of-mononuclear-cells-collected-using-photopheresis-systems
#9
Zbigniew M Szczepiorkowski, Christine A Burnett, Larry J Dumont, Sunil H Abhyankar
BACKGROUND: Extracorporeal photopheresis (ECP) has been approved for the treatment of advanced cutaneous T-cell lymphoma since 1988. While the precise mechanisms resulting in clinical effects are not fully understood, the photoactivation of mononuclear cells (MNCs) using ultraviolet A (UVA) light and methoxsalen is believed to be the predominant initiating process. The effects of MNC passage through the instrument without photoactivation are unknown. The objective of this study was to evaluate the effect of cell processing through the photopheresis instruments on MNCs...
February 16, 2018: Transfusion
https://www.readbyqxmd.com/read/29451169/patient-perception-and-preference-of-eus-guided-drainage-over-percutaneous-drainage-when-endoscopic-transpapillary-biliary-drainage-fails-an-international-multicenter-survey
#10
Kwangwoo Nam, Dong Uk Kim, Tae Hoon Lee, Takuji Iwashita, Yousuke Nakai, Ahmed Bolkhir, Lara Aguilera Castro, Enrique Vazquez-Sequeiros, Carlos de la Serna, Manuel Perez-Miranda, John G Lee, Sang Soo Lee, Dong-Wan Seo, Sung Koo Lee, Myung-Hwan Kim, Do Hyun Park
Background and Objectives: EUS-guided biliary drainage (EUS-BD) is a feasible procedure when ERCP fails, as is percutaneous transhepatic BD (PTBD). However, little is known about patient perception and preference of EUS-BD and PTBD. Patients and Methods: An international multicenter survey was conducted in seven tertiary referral centers. In total, 327 patients, scheduled to undergo ERCP for suspected malignant biliary obstruction, were enrolled in the study. Patients received decision aids with visual representation regarding the techniques, benefits, and adverse events (AEs) of EUS-BD and PTBD...
January 2018: Endoscopic Ultrasound
https://www.readbyqxmd.com/read/29451120/an-in-silico-framework-to-analyze-the-anisotropic-shear-wave-mechanics-in-cardiac-shear-wave-elastography
#11
Annette Caenen, Mathieu Pernot, Mathias Peirlinck, Luc Mertens, Abigail Swillens, Patrick Segers
Shear wave elastography (SWE) is a potential tool to non-invasively assess cardiac muscle stiffness. This study focused on the effect of the orthotropic material properties and mechanical loading on the performance of cardiac SWE, as it is known that these factors contribute to complex 3D anisotropic shear wave propagation. To investigate the specific impact of these complexities, we constructed a finite element model with an orthotropic material law subjected to different uniaxial stretches to simulate SWE in the stressed cardiac wall...
February 16, 2018: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29450028/implementation-of-a-novel-synchronous-multi-site-all-day-high-fidelity-simulation
#12
Paul Abraham, Franck Verdonk, Clement Buleon, Antoine Tesniere, Marc Lilot
Integration of simulation in educational curricula for anesthesia and intensive care residents is a hot topic. There is a great interest for simulation centers to share their experiences through multi-site synchronous simulation sessions. The present study results from an experience conducted at three sites in France (Paris, Lyon, and Caen), which involved 16 instructors and 25 residents facing the same scenario across 1 day. Synchronous simulations were performed at each site with local and shared debriefing via teleconference...
2018: Advances in Simulation
https://www.readbyqxmd.com/read/29448995/a-stochastic-view-on-column-efficiency
#13
Fabrice Gritti
A stochastic model of transcolumn eddy dispersion along packed beds was derived. It was based on the calculation of the mean travel time of a single analyte molecule from one radial position to another. The exchange mechanism between two radial positions was governed by the transverse dispersion of the analyte across the column. The radial velocity distribution was obtained by flow simulations in a focused-ion-beam scanning electron microscopy (FIB-SEM) based 3D reconstruction from a 2.1 mm × 50 mm column packed with 2 μm BEH-C 18 particles...
February 9, 2018: Journal of Chromatography. A
https://www.readbyqxmd.com/read/29448779/flow-of-quasi-two-dimensional-water-in-graphene-channels
#14
Chao Fang, Xihui Wu, Fengchang Yang, Rui Qiao
When liquids confined in slit channels approach a monolayer, they become two-dimensional (2D) fluids. Using molecular dynamics simulations, we study the flow of quasi-2D water confined in slit channels featuring pristine graphene walls and graphene walls with hydroxyl groups. We focus on to what extent the flow of quasi-2D water can be described using classical hydrodynamics and what are the effective transport properties of the water and the channel. First, the in-plane shearing of quasi-2D water confined between pristine graphene can be described using the classical hydrodynamic equation, and the viscosity of the water is ∼50% higher than that of the bulk water in the channel studied here...
February 14, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29447221/how-does-the-interaction-radius-affect-the-performance-of-intervention-on-collective-behavior
#15
Caiyun Wang, Jing Han
The interaction radius r plays an important role in the collective behavior of many multi-agent systems because it defines the interaction network among agents. For the topic of intervention on collective behavior of multi-agent systems, does r also affect the intervention performance? In this paper we study whether it is easier to change the convergent heading of the group by adding some special agents (called shills) into the Vicsek model when r is larger (or smaller). Two kinds of shills are considered: fixed-heading shills (like leaders that never change their headings) and evolvable-heading shills (like normal agents but with carefully designed initial headings)...
2018: PloS One
https://www.readbyqxmd.com/read/29445882/procedure-rates-performed-by-emergency-medicine-residents-a-retrospective-review
#16
Joshua T Bucher, Christopher Bryczkowski, Grant Wei, Renee L Riggs, Anoop Kotwal, Brian Sumner, Jonathan V McCoy
BACKGROUND: The purpose of our study is to investigate rates of individual procedures performed by residents in our emergency medicine (EM) residency program. Different programs expose residents to different training environments. Our hypothesis is that ultrasound examinations are the most commonly performed procedure in our residency. METHODS: The study took place in an academic level I trauma center with multiple residency and fellowship programs including surgery, surgical critical care, trauma, medicine, pulmonary/critical care, anesthesiology and others...
February 14, 2018: International Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29445872/bowman-layer-transplantation-5-year-results
#17
Korine van Dijk, Jack S Parker, Lamis Baydoun, Abbas Ilyas, Isabel Dapena, Esther A Groeneveld-van Beek, Gerrit R J Melles
PURPOSE: The purpose of this study was to evaluate the 5-year clinical results of isolated Bowman layer (BL) transplantation in the treatment of advanced keratoconus. METHODS: In this prospective, single-center, interventional case series at a tertiary referral center, 20 eyes of 17 patients with advanced keratoconus underwent BL transplantation, i.e. an isolated Bowman layer graft was positioned into a manually dissected mid-stromal pocket. Scheimpflug-based corneal tomography measurements, best corrected spectacle and contact lens visual acuities (BSCVA and BCLVA), endothelial cell density, and complications were evaluated up to 5 years after surgery...
February 14, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29444405/fullerene-functionalized-monolayer-protected-silver-clusters-ag29-bdt-12-c60-n-3-n-1-9
#18
Papri Chakraborty, Abhijit Nag, Ganesan Paramasivam, Ganapati Natarajan, Thalappil Pradeep
We report the formation of supramolecular adducts between monolayer-protected noble metal nanoclusters and fullerenes, specifically focussing on a well-known silver cluster, [Ag29(BDT)12]3-, where BDT is 1,3-benzene dithiol. We demonstrate that C60 molecules link with the cluster at specific locations and protect the fragile cluster core, enhancing the stability of the cluster. A combination of studies including UV-vis, high-resolution electrospray ionization mass spectrometry (ESI MS), collision-induced dissociation (CID), and nuclear magnetic resonance (NMR) spectroscopy revealed structural details of the fullerene-functionalized clusters, [Ag29(BDT)12(C60)n]3- (n=1-9)...
February 14, 2018: ACS Nano
https://www.readbyqxmd.com/read/29444014/intensity-noise-behavior-of-an-inas-ingaas-quantum-dot-laser-emitting-on-ground-states-and-excited-states
#19
R Pawlus, L L Columbo, P Bardella, S Breuer, M Gioannini
We experimentally and numerically study the amplitude stability of an InAs/InGaAs quantum dot laser emitting simultaneously on ground states (GSs) and excited state (ESs) at center wavelengths of 1245 and 1168 nm, respectively. The stability is quantified by a spectrally resolved noise current analysis that is dependent on the laser injection current. We find a non-monotonic behavior of the amplitude noise which shows a reduction of up to 4 dB when the GS and ES emit simultaneously. Simulations based on a rate equation model confirm the reduction in noise and suggest the cascaded GS and ES carrier paths as the relevant underlying mechanism...
February 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29442810/one-pot-facile-synthesis-of-pt-nanoparticles-using-cultural-filtrate-of-microgravity-simulated-grown-p-chrysogenum-and-their-activity-on-bacteria-and-cancer-cells
#20
Sivakumar Allur Subramaniyan, Sunirmal Sheet, Mohanraj Vinothkannan, Dong Jin Yoo, Yang Soo Lee, Shah Ahmed Belal, Kwan Seob Shim
Platinum nanoparticles (Pt NPs) was synthesized via a facile and cost competitive ont-pot green mediated synthesis using cell free cultural filtrate (microgravity simulated grown Penicillium chrysogenum) as a reducing agent. The toxicity effect of synthesized Pt NPs toward myoblast C2C12 carcinoma cells was then investigated. The particle size analyzer (DLS) and transmission electron microscopy (TEM) results demonstrates that both NG-Pt NPs and MG-Pt NPS are spherical in shape with an average diameter of 15 nm and 8...
May 1, 2018: Journal of Nanoscience and Nanotechnology
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