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https://www.readbyqxmd.com/read/28350887/auditory-steady-state-responses-and-cochlear-implants-modeling-the-artifact-response-mixture-in-the-perspective-of-denoising
#1
Faten Mina, Virginie Attina, Yvan Duroc, Evelyne Veuillet, Eric Truy, Hung Thai-Van
Auditory steady state responses (ASSRs) in cochlear implant (CI) patients are contaminated by the spread of a continuous CI electrical stimulation artifact. The aim of this work was to model the electrophysiological mixture of the CI artifact and the corresponding evoked potentials on scalp electrodes in order to evaluate the performance of denoising algorithms in eliminating the CI artifact in a controlled environment. The basis of the proposed computational framework is a neural mass model representing the nodes of the auditory pathways...
2017: PloS One
https://www.readbyqxmd.com/read/28346603/residency-program-directors-interview-methods-and-satisfaction-with-resident-selection-across-multiple-specialties
#2
Tonya VanOrder, Wayne Robbins, Eric Zemper
CONTEXT: Competition for postdoctoral training positions is at an all-time high, and residency program directors continue to have little direction when it comes to structuring an effective interview process. OBJECTIVES: To examine whether a relationship existed between interview methods used and program director satisfaction with resident selection decisions and whether programs that used methods designed to assess candidate personal characteristics were more satisfied with their decisions...
April 1, 2017: Journal of the American Osteopathic Association
https://www.readbyqxmd.com/read/28342616/performance-of-leading-artifact-removal-algorithms-assessed-across-microwave-breast-imaging-prototype-scan-configurations
#3
M A Elahi, C Curtis, B R Lavoie, M Glavin, E Jones, E Fear, M O'Halloran
Microwave imaging is a promising imaging modality for the detection of early-stage breast cancer. One of the most important signal processing components of microwave radar-based breast imaging is early-stage artifact removal. Several artifact removal algorithms have been reported in the literature. However, the neighbourhood-based skin subtraction and hybrid artifact removal algorithms have shown particularly promising results in different realistic 3D breast phantoms. For the first time in this paper, both algorithms have been evaluated and compared using the scan approaches of the most common microwave breast imaging prototype systems...
March 2, 2017: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/28341324/the-suitcase-packing-activity-a-new-evaluation-of-hand-function
#4
Matthew L Baumann, Jill M Cancio, Kathleen E Yancosek
STUDY DESIGN: Prospective, repeated-measures study. INTRODUCTION: Understanding individual hand function can assist therapists with the process of determining relevant treatment approaches and realistic therapeutic outcomes. At this point in time, a composite test that assesses both unilateral and bimanual hand function in relation to a functional activity is not available. PURPOSE OF THE STUDY: To establish the reliability and validity of the suitcase packing activity (SPA)...
March 21, 2017: Journal of Hand Therapy: Official Journal of the American Society of Hand Therapists
https://www.readbyqxmd.com/read/28339632/dosing-down-with-biologic-therapies-a-systematic-review-and-clinicians-perspective
#5
Christopher J Edwards, Bruno Fautrel, Hendrik Schulze-Koops, Tom W J Huizinga, Klaus Kruger
The effectiveness of biologic therapies now means that remission or low disease activity are realistic targets for treatment. However, after achieving remission/low disease activity, the next steps remain unclear. The aim of this publication was to conduct a broad systematic literature review to evaluate dosing down of biologics. After screening papers and abstracts for relevance and application of inclusion/exclusion criteria, a structured extraction process was used to collect information on the included studies...
February 16, 2017: Rheumatology
https://www.readbyqxmd.com/read/28338471/generalized-psf-modelling-for-optimized-quantitation-in-pet-imaging
#6
Saeed Ashrafinia, Hassan Mohy-Ud-Din, Nicolas Karakatsanis, Abhinav Jha, Michael Casey, Dan Kadrmas, Arman Rahmim
Point-Spread Function (PSF) modelling offers the capability to account for resolution degrading phenomena within the PET reconstruction framework. PSF modelling improves resolution and enhances contrast, but at the same time significantly alters image noise properties and induces edge overshoot effect. Thus, studying the effect of PSF modelling on quantitation task performance can be very important. Frameworks explored in the past involve a dichotomy of PSF vs. no-PSF modelling. By contrast, the present work focuses on quantitative performance evaluation of standard uptake value (SUV) PET images, while incorporating a wide spectrum of PSF models, including those that under- and over-estimate the true PSF, for the potential of enhanced quantitation of standardized uptake values (SUVs)...
March 24, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28336883/evaluating-adverse-effects-of-inhaled-nanoparticles-by-realistic-in-vitro-technology
#7
REVIEW
Marianne Geiser, Natalie Jeannet, Martin Fierz, Heinz Burtscher
The number of daily products containing nanoparticles (NP) is rapidly increasing. NP in powders, dispersions, or sprays are a yet unknown risk for incidental exposure, especially at workplaces during NP production and processing, and for consumers of any health status and age using NP containing sprays. We developed the nano aerosol chamber for in vitro toxicity (NACIVT), a portable instrument for realistic safety testing of inhaled NP in vitro and evaluated effects of silver (Ag) and carbon (C) NP-which belong to the most widely used nanomaterials-on normal and compromised airway epithelia...
February 22, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28335460/neuropsychology-of-aesthetic-judgment-of-ambiguous-and-non-ambiguous-artworks
#8
Maddalena Boccia, Sonia Barbetti, Laura Piccardi, Cecilia Guariglia, Anna Maria Giannini
Several affective and cognitive processes have been found to be pivotal in affecting aesthetic experience of artworks and both neuropsychological as well as psychiatric symptoms have been found to affect artistic production. However, there is a paucity of studies directly investigating effects of brain lesions on aesthetic judgment. Here, we assessed the effects of unilateral brain damage on aesthetic judgment of artworks showing part/whole ambiguity. We asked 19 unilaterally brain-damaged patients (10 left and 9 right brain damaged patients, respectively LBDP and RBDP) and 20 age- and education-matched healthy individuals (controls, C) to rate 10 Arcimboldo's ambiguous portraits (AP), 10 realistic Renaissance portraits (RP), 10 still life paintings (SL), and 10 Arcimboldo's modified portraits where only objects/parts are detectable (AO)...
March 18, 2017: Behavioral Sciences
https://www.readbyqxmd.com/read/28334910/evaluating-pharmacist-input-into-the-pharmaceutical-care-of-patients-in-dispensing-medical-practices-in-remote-and-rural-areas-of-scotland
#9
Derek Stewart, Breda Anthony, Clare Morrison, Yvonne MacRae, Lucy Dixon, Emer Friel, Evelyn Yoong, Scott Cunningham, Katie MacLure
Background.: The Highlands and the Western Isles are the two most remote and rural areas of Scotland, with many medical practices in areas where pharmacies would not be viable. Recent regulations state that that dispensing medical practices in these areas must receive pharmacist support for patients who would benefit. Objective.: This study aimed to evaluate pilot services, which centred on the provision of patient centred pharmaceutical care. Methods...
March 8, 2017: Family Practice
https://www.readbyqxmd.com/read/28332899/in-vitro-tests-for-aerosol-deposition-v-using-realistic-testing-to-estimate-variations-in-aerosol-properties-at-the-trachea
#10
Xiangyin Wei, Michael Hindle, Renishkumar R Delvadia, Peter R Byron
BACKGROUND: The dose and aerodynamic particle size distribution (APSD) of drug aerosols' exiting models of the mouth and throat (MT) during a realistic inhalation profile (IP) may be estimated in vitro and designated Total Lung Dose, TLDin vitro, and APSDTLDin vitro, respectively. These aerosol characteristics likely define the drug's regional distribution in the lung. METHODS: A general method was evaluated to enable the simultaneous determination of TLDin vitro and APSDTLDin vitro for budesonide aerosols' exiting small, medium and large VCU-MT models...
March 23, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/28328499/importance-of-matching-physical-friction-hardness-and-texture-in-creating-realistic-haptic-virtual-surfaces
#11
Heather Culbertson, Katherine J Kuchenbecker
Interacting with physical objects through a tool elicits tactile and kinesthetic sensations that comprise your haptic impression of the object. These cues, however, are largely missing from interactions with virtual objects, yielding an unrealistic user experience. This article evaluates the realism of virtual surfaces rendered using haptic models constructed from data recorded during interactions with real surfaces. The models include three components: surface friction, tapping transients, and texture vibrations...
January 2017: IEEE Transactions on Haptics
https://www.readbyqxmd.com/read/28328291/evaluation-of-multi-parameter-test-statistics-for-multiple-imputation
#12
Yu Liu, Craig K Enders
In Ordinary Least Square regression, researchers often are interested in knowing whether a set of parameters is different from zero. With complete data, this could be achieved using the gain in prediction test, hierarchical multiple regression, or an omnibus F test. However, in substantive research scenarios, missing data often exist. In the context of multiple imputation, one of the current state-of-art missing data strategies, there are several different analogous multi-parameter tests of the joint significance of a set of parameters, and these multi-parameter test statistics can be referenced to various distributions to make statistical inferences...
March 22, 2017: Multivariate Behavioral Research
https://www.readbyqxmd.com/read/28323592/measuring-uptake-and-elimination-of-nitrogen-in-humans-at-different-ambient-pressures
#13
Patrik Sundblad, Oskar Frånberg, Christoph Siebenmann, Mikael Gennser
BACKGROUND: To measure nitrogen (N2) wash-out and uptake requires elaborate set-ups, especially when doing the measurements at increased or decreased ambient pressure. Here we present a transportable device for quantifying N2 turnover in humans which can be used at different ambient pressures. METHODS: A modified close-circuit electronic rebreather was used to assess N2 turnover. Changes in N2 volume within the rebreathing circuit, reflecting N2 uptake or washout, were derived from the continuously monitored total system volume and the calculated volumes of oxygen and water vapor...
December 1, 2016: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28321699/magnetic-edta-functionalized-cofe2o4-nanoparticles-edta-cofe2o4-as-a-novel-catalyst-for-peroxymonosulfate-activation-and-degradation-of-orange-g
#14
Lin Deng, Zhou Shi, Zhiyan Zou, Shiqing Zhou
EDTA functionalized CoFe2O4 nanoparticles (EDTA-CoFe2O4) synthesized using a facile one-pot solvothermal method were employed as catalysts to activate peroxymonosulfate (PMS) with Orange G (OG) as the target pollutant. Effects of operating parameters including initial solution pH, catalyst dosage, PMS dosage, and water matrix components such as Cl(-), NO3(-), CO3(2-), and humic acid were evaluated. A degradation efficiency of 93% was achieved in 15 min with 1 mM PMS and 0.2 g/L EDTA-CoFe2O4 catalyst, while only 57% of OG was degraded within 15 min in CoFe2O4/PMS system...
March 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28320643/expanding-research-methods-for-a-realistic-understanding-of-personal-visualization
#15
Alice Thudt, Bongshin Lee, Eun Kyoung Choe, Sheelagh Carpendale
Personal visualizations have the great potential to provide the benefits of visualizations to everyone in their everyday lives. Their diverse goals combined with the personal data they contain and the contexts in which they are being used, however, make their evaluation particularly challenging and call for a wider perspective on empirical approaches. We need to devise new methods and adapt existing methods from other fields to account for the specific goals and challenges in this emerging research area. An open-minded approach to empirical methods may help us gain a more realistic understanding of personal visualizations...
March 2017: IEEE Computer Graphics and Applications
https://www.readbyqxmd.com/read/28320325/-was-that-a-success-or-not-a-success-a-qualitative-study-of-health-professionals-perspectives-on-support-for-people-with-long-term-conditions
#16
John Owens, Vikki A Entwistle, Alan Cribb, Zoë C Skea, Simon Christmas, Heather Morgan, Ian S Watt
BACKGROUND: Support for self-management (SSM) is a prominent strand of health policy internationally, particularly for primary care. It is often discussed and evaluated in terms of patients' knowledge, skills and confidence, health-related behaviours, disease control or risk reduction, and service use and costs. However, these goals are limited, both as guides to professional practice and as indicators of its quality. In order to better understand what it means to support self-management well, we examined health professionals' views of success in their work with people with long-term conditions...
March 20, 2017: BMC Family Practice
https://www.readbyqxmd.com/read/28320070/dexpramipexole-improves-bioenergetics-and-outcome-in-experimental-stroke
#17
Mirko Muzzi, Elisabetta Gerace, Daniela Buonvicino, Elisabetta Coppi, Francesco Resta, Laura Formentini, Riccardo Zecchi, Laura Tigli, Daniele Guasti, Martina Ferri, Emidio Camaioni, Alessio Masi, Domenico E Pellegrini-Giampietro, Guido Mannaioni, Daniele Bani, Anna M Pugliese, Alberto Chiarugi
BACKGROUND AND PURPOSE: To investigate the effects of dexpramipexole, a drug recently tested in ALS patients able to bind F1Fo ATP synthase and increase mitochondrial ATP production, on experimental ischemic brain injury. EXPERIMENTAL APPROACH: The effects of dexpramipexole on bioenergetics, Ca(2+) fluxes, electrophysiological functions and death were evaluated in primary neural cultures and hippocampal slices exposed to oxygen-glucose deprivation (OGD). The drug's impact on infarct volumes and neurological functions was also evaluated in mice subjected to proximal or distal MCAo...
March 20, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28317122/an-anthropomorphic-abdominal-phantom-for-deformable-image-registration-accuracy-validation-in-adaptive-radiation-therapy
#18
Yuliang Liao, Linjing Wang, Xiangdong Xu, Haibin Chen, Jiawei Chen, Guoqian Zhang, Huaiyu Lei, Ruihao Wang, Shuxu Zhang, Xuejun Gu, Xin Zhen, Linghong Zhou
PURPOSE: To design and construct a three-dimensional (3D) anthropomorphic abdominal phantom for geometric accuracy and dose summation accuracy evaluations of deformable image registration (DIR) algorithms for adaptive radiation therapy (ART). METHOD: Organ molds, including liver, kidney, spleen, stomach, vertebra and two metastasis tumors, were 3D printed using contours from an ovarian cancer patient. The organ molds were molded with deformable gels made of different mixtures of polyvinyl chloride (PVC) and the softener dioctyl terephthalate...
March 20, 2017: Medical Physics
https://www.readbyqxmd.com/read/28315633/using-simulated-fluorescence-cell-micrographs-for-the-evaluation-of-cell-image-segmentation-algorithms
#19
Veit Wiesmann, Matthias Bergler, Ralf Palmisano, Martin Prinzen, Daniela Franz, Thomas Wittenberg
BACKGROUND: Manual assessment and evaluation of fluorescent micrograph cell experiments is time-consuming and tedious. Automated segmentation pipelines can ensure efficient and reproducible evaluation and analysis with constant high quality for all images of an experiment. Such cell segmentation approaches are usually validated and rated in comparison to manually annotated micrographs. Nevertheless, manual annotations are prone to errors and display inter- and intra-observer variability which influence the validation results of automated cell segmentation pipelines...
March 18, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28303342/comparison-of-fabric-skins-for-the-simulation-of-sweating-on-thermal-manikins
#20
Barbara Koelblen, Agnes Psikuta, Anna Bogdan, Simon Annaheim, René M Rossi
Sweating is an important thermoregulatory process helping to dissipate heat and, thus, to prevent overheating of the human body. Simulations of human thermo-physiological responses in hot conditions or during exercising are helpful for assessing heat stress; however, realistic sweating simulation and evaporative cooling is needed. To this end, thermal manikins dressed with a tight fabric skin can be used, and the properties of this skin should help human-like sweat evaporation simulation. Four fabrics, i.e...
March 16, 2017: International Journal of Biometeorology
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