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https://www.readbyqxmd.com/read/28822248/tio2-nanoparticles-in-sediments-effect-on-the-bioavailability-of-heavy-metals-in-the-freshwater-bivalve-corbicula-fluminea
#1
Xiulei Fan, Chao Wang, Peifang Wang, Bin Hu, Xun Wang
Most studies investigating the influence of TiO2 NPs on heavy metal bioavailability have focused on the aqueous phase; however, few have examined the sediments containing more nanoparticles. Here, we investigated the effects of TiO2 NPs on heavy metal bioavailability in C. fluminea in sediments. The interactions between the TiO2 NPs and metals in sediments, the influence of TiO2 NPs on metals levels in aqueous phase and geochemical speciation were also explored. The results indicated the large adsorption capacity of TiO2 NPs and the strong adsorption affinity to metals caused the metals adsorbed on nanoparticles, which decreased the metals concentrations in water phase...
July 21, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28817772/quantifying-elucidating-thermally-enhanced-minority-carrier-diffusion-length-using-radius-controlled-rutile-nanowires
#2
Liming Zhang, Litianqi Sun, Zixuan Guan, Sang Chul Lee, Yingzhou Li, Haitao Dean Deng, Yiyang Li, Nadia Ahlborg, Madhur Boloor, Nicholas A Melosh, William C Chueh
Minority carrier diffusion length (LD) is a crucial property that determines the performance of light absorbers in photoelectrochemical (PEC) cells. Many transition-metal oxides are stable photoanodes for solar water splitting but exhibit a small to moderate LD, ranging from a few nanometers (such as α-Fe2O3 and TiO2) to a few tens of nanometers (such as BiVO4). Under operating conditions, temperature of PEC cells can deviate substantially from ambient, yet the temperature-dependence of LD has not been quantified...
August 17, 2017: Nano Letters
https://www.readbyqxmd.com/read/28814009/preliminary-results-toward-a-naturally-controlled-multi-synergistic-prosthetic-hand
#3
Matteo Rossi, Cosimo Della Santina, Cristina Piazza, Giorgio Grioli, Manuel Catalano, Antonio Biechi
Robotic hands embedding human motor control principles in their mechanical design are getting increasing interest thanks to their simplicity and robustness, combined with good performance. Another key aspect of these hands is that humans can use them very effectively thanks to the similarity of their behavior with real hands. Nevertheless, controlling more than one degree of actuation remains a challenging task. In this paper, we take advantage of these characteristics in a multi-synergistic prosthesis. We propose an integrated setup composed of Pisa/IIT SoftHand 2 and a control strategy which simultaneously and proportionally maps the human hand movements to the robotic hand...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813989/quantification-of-information-transfer-rate-of-the-human-hand-during-a-mouse-clicking-task-with-healthy-adults-and-one-adult-with-duchenne-muscular-dystrophy
#4
Kostas Nizamis, Wouter Schutte, Jasper Goseling, Bart F J M Koopman
Duchenne muscular Dystrophy (DMD) Is a progressive muscle degenerative disease. Active hand assistive devices, can improve the quality of life of people with DMD. Such devices show a rejection rate due to complexity. Our hypothesis is, that a simple orthosis might prove more functional and realistic in assisting people with DMD. To investigate, we developed a portable setup that provides various visual stimuli and records the response of the subjects' fingers through a mouse clicking task. Six LEDs served as visual stimuli...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813643/multi-connection-pattern-analysis-decoding-the-representational-content-of-neural-communication
#5
Yuanning Li, R Mark Richardson, Avniel Singh Ghuman
The lack of multivariate methods for decoding the representational content of interregional neural communication has left it difficult to know what information is represented in distributed brain circuit interactions. Here we present Multi-Connection Pattern Analysis (MCPA), which works by learning mappings between the activity patterns of the populations as a factor of the information being processed. These maps are used to predict the activity from one neural population based on the activity from the other population...
August 13, 2017: NeuroImage
https://www.readbyqxmd.com/read/28811996/experimental-method-and-statistical-analysis-to-fit-tumor-growth-model-using-spect-ct-imaging-a-preclinical-study
#6
Ivan Hidrovo, Joyoni Dey, Megan E Chesal, Dmytro Shumilov, Narayan Bhusal, J Michael Mathis
BACKGROUND: Over the last decade, several theoretical tumor-models have been developed to describe tumor growth. Oncology imaging is performed using various modalities including computed tomography (CT), magnetic resonance imaging (MRI), single-photon emission computed tomography (SPECT) and fluorodeoxyglucose-positron emission tomography (FDG-PET). Our goal is to extract useful, otherwise hidden, quantitative biophysical parameters (such as growth-rate, tumor-necrotic-factor, etc.) from these serial images of tumors by fitting mathematical models to images...
June 2017: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/28806964/intervention-now-to-eliminate-repeat-unintended-pregnancy-in-teenagers-interupt-a-systematic-review-of-intervention-effectiveness-and-cost-effectiveness-and-qualitative-and-realist-synthesis-of-implementation-factors-and-user-engagement
#7
Rabeea'h W Aslam, Maggie Hendry, Andrew Booth, Ben Carter, Joanna M Charles, Noel Craine, Rhiannon Tudor Edwards, Jane Noyes, Lupetu Ives Ntambwe, Diana Pasterfield, Jo Rycroft-Malone, Nefyn Williams, Rhiannon Whitaker
BACKGROUND: Unintended repeat conceptions can result in emotional, psychological and educational harm to young women, often with enduring implications for their life chances. This study aimed to identify which young women are at the greatest risk of repeat unintended pregnancies; which interventions are effective and cost-effective; and what are the barriers to and facilitators for the uptake of these interventions. METHODS: We conducted a mixed-methods systematic review which included meta-analysis, framework synthesis and application of realist principles, with stakeholder input and service user feedback to address this...
August 15, 2017: BMC Medicine
https://www.readbyqxmd.com/read/28806768/design-and-fabrication-of-a-realistic-anthropomorphic-heterogeneous-head-phantom-for-mr-purposes
#8
Sossena Wood, Narayanan Krishnamurthy, Tales Santini, Shailesh Raval, Nadim Farhat, John Andy Holmes, Tamer S Ibrahim
OBJECTIVE: The purpose of this study is to design an anthropomorphic heterogeneous head phantom that can be used for MRI and other electromagnetic applications. MATERIALS AND METHODS: An eight compartment, physical anthropomorphic head phantom was developed from a 3T MRI dataset of a healthy male. The designed phantom was successfully built and preliminarily evaluated through an application that involves electromagnetic-tissue interactions: MRI (due to it being an available resource)...
2017: PloS One
https://www.readbyqxmd.com/read/28805525/pace-gate-an-alternative-view-on-a-study-with-a-poor-trial-protocol
#9
Bart Stouten
The controversies surrounding the effectiveness of cognitive behavioural therapy and graded exercise therapy for chronic fatigue syndrome are explained using Cohen's d effect sizes rather than arbitrary thresholds for 'success'. This article shows that the treatment effects vanish when switching to objective outcomes. The preference for subjective outcomes by the PACE trial team leads to false hope. This article provides a more realistic view, which will help patients and their doctors to evaluate the pros and cons...
August 2017: Journal of Health Psychology
https://www.readbyqxmd.com/read/28804697/evaluation-of-satellite-and-reanalysis-based-global-net-surface-energy-flux-and-uncertainty-estimates
#10
Chunlei Liu, Richard P Allan, Michael Mayer, Patrick Hyder, Norman G Loeb, Chris D Roberts, Maria Valdivieso, John M Edwards, Pier-Luigi Vidale
The net surface energy flux is central to the climate system yet observational limitations lead to substantial uncertainty. A combination of satellite-derived radiative fluxes at the top of atmosphere adjusted using the latest estimation of the net heat uptake of the Earth system, and the atmospheric energy tendencies and transports from the ERA-Interim reanalysis are used to estimate surface energy flux globally. To consider snowmelt and improve regional realism, land surface fluxes are adjusted through a simple energy balance approach at each grid point...
June 27, 2017: Journal of Geophysical Research. Atmospheres: JGR
https://www.readbyqxmd.com/read/28803457/development-of-a-proficiency-based-virtual-reality-simulation-training-curriculum-for-laparoscopic-appendicectomy
#11
Pramudith Sirimanna, Marc A Gladman
BACKGROUND: Proficiency-based virtual reality (VR) training curricula improve intraoperative performance, but have not been developed for laparoscopic appendicectomy (LA). This study aimed to develop an evidence-based training curriculum for LA. METHODS: A total of 10 experienced (>50 LAs), eight intermediate (10-30 LAs) and 20 inexperienced (<10 LAs) operators performed guided and unguided LA tasks on a high-fidelity VR simulator using internationally relevant techniques...
August 13, 2017: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/28801497/veterinary-student-competence-in-equine-lameness-recognition-and-assessment-a-mixed-methods-study
#12
Sandra D Starke, Stephen A May
The development of perceptual skills is an important aspect of veterinary education. The authors investigated veterinary student competency in lameness evaluation at two stages, before (third year) and during (fourth/fifth year) clinical rotations. Students evaluated horses in videos, where horses were presented during trot on a straight line and in circles. Eye-tracking data were recorded during assessment on the straight line to follow student gaze. On completing the task, students filled in a structured questionnaire...
August 12, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28801433/developing-core-economic-outcome-sets-for-asthma-studies-a-protocol-for-a-systematic-review
#13
Natalia Hounsome, Deborah Fitzsimmons, Ceri Phillips, Anita Patel
INTRODUCTION: Core outcome sets are standardised lists of outcomes, which should be measured and reported in all clinical studies of a specific condition. This study aims to develop core outcome sets for economic evaluations in asthma studies. Economic outcomes include items such as costs, resource use or quality-adjusted life years. The starting point in developing core outcome sets will be conducting a systematic literature review to establish a preliminary list of reporting items to be considered for inclusion in the core outcome set...
August 11, 2017: BMJ Open
https://www.readbyqxmd.com/read/28801403/equipping-community-pharmacy-workers-as-agents-for-health-behaviour-change-developing-and-testing-a-theory-based-smoking-cessation-intervention
#14
Liz Steed, Ratna Sohanpal, Wai-Yee James, Carol Rivas, Sandra Jumbe, Angel Chater, Adam Todd, Elizabeth Edwards, Virginia Macneil, Fraser Macfarlane, Trisha Greenhalgh, Chris Griffiths, Sandra Eldridge, Stephanie Taylor, Robert Walton
OBJECTIVE: To develop a complex intervention for community pharmacy staff to promote uptake of smoking cessation services and to increase quit rates. DESIGN: Following the Medical Research Council framework, we used a mixed-methods approach to develop, pilot and then refine the intervention. METHODS: Phase I: We used information from qualitative studies in pharmacies, systematic literature reviews and the Capability, Opportunity, Motivation-Behaviour framework to inform design of the initial version of the intervention...
August 11, 2017: BMJ Open
https://www.readbyqxmd.com/read/28800447/two-phase-displacements-in-microchannels-of-triangular-cross-section
#15
Yafei Liu, Andrew Hansen, Erica Block, Norman R Morrow, Jeff Squier, John Oakey
Varying microfluidic channel cross-sectional geometry can dramatically alter fluid flow behavior, particularly for capillary-driven flow. Most fabrication techniques, however, are planar and therefore incapable of providing depth-dependent variations in width. We introduce an ultrafast laser ablation technique that enables the fabrication of microchannels with arbitrary triangular cross sectional geometry. Triangular channels were fabricated with widths ranging from 45 to 116µm and aspect ratios between 0...
August 3, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28799475/can-staff-be-supported-to-deliver-compassionate-care-through-implementing-schwartz-rounds-in-community-and-mental-health-services
#16
Michelle Farr, Rhiannon Barker
Schwartz Rounds are evidence-based interdisciplinary discussions where health care staff can share experiences of the emotional and social aspects of care, to support improvements in patient care. Developed in acute services, they are now being implemented in various settings including U.K. community and mental health services where their implementation has not been researched. Realist evaluation was used to analyze three community and mental health case studies of Round implementation, involving Round observations ( n = 5), staff interviews ( n = 22), and post-Round evaluation sheets ( n = 206)...
September 2017: Qualitative Health Research
https://www.readbyqxmd.com/read/28793983/how-do-ehealth-programs-for-adolescents-with-depression-work-a-realist-review-of-persuasive-system-design-components-in-internet-based-psychological-therapies
#17
Lori Wozney, Anna Huguet, Kathryn Bennett, Ashley D Radomski, Lisa Hartling, Michele Dyson, Patrick J McGrath, Amanda S Newton
BACKGROUND: Major depressive disorders are common among adolescents and can impact all aspects of their daily life. Traditional therapies, cognitive behavioral therapy (CBT), and interpersonal psychotherapy (IPT) have been delivered face-to-face. However, Internet-based (online) delivery of these therapies is emerging as an option for adolescents. Internet-based CBT and IPT involve therapeutic content, interaction between the user and the system, and different technological features embedded into the online program (eg, multimedia)...
August 9, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28792979/analyzing-the-effectiveness-of-vocal-features-in-early-telediagnosis-of-parkinson-s-disease
#18
Betul Erdogdu Sakar, Gorkem Serbes, C Okan Sakar
The recently proposed Parkinson's Disease (PD) telediagnosis systems based on detecting dysphonia achieve very high classification rates in discriminating healthy subjects from PD patients. However, in these studies the data used to construct the classification model contain the speech recordings of both early and late PD patients with different severities of speech impairments resulting in unrealistic results. In a more realistic scenario, an early telediagnosis system is expected to be used in suspicious cases by healthy subjects or early PD patients with mild speech impairment...
2017: PloS One
https://www.readbyqxmd.com/read/28783868/single-index-methods-for-evaluation-of-marker-guided-treatment-rules-based-on-multivariate-marker-panels
#19
Veronika Skrivankova, Patrick J Heagerty
Clinical practice may be enhanced by use of person-level information that could guide treatment choice and lead to better outcomes for both treated individuals and for the population. The scientific challenge is to identify and validate those factors that can reliably be used to target treatment, and to accurately quantify the expected treatment benefit as a function of candidate markers. Our proposal is to explicitly focus on smooth non-parametric evaluation of a canonical single index score that estimates the expected treatment benefit associated with patient characteristics...
August 7, 2017: Biometrics
https://www.readbyqxmd.com/read/28781414/test-suite-for-image-based-motion-estimation-of-the-brain-and-tongue
#20
Jordan Ramsey, Jerry L Prince, Arnold D Gomez
Noninvasive analysis of motion has important uses as qualitative markers for organ function and to validate biomechanical computer simulations relative to experimental observations. Tagged MRI is considered the gold standard for noninvasive tissue motion estimation in the heart, and this has inspired multiple studies focusing on other organs, including the brain under mild acceleration and the tongue during speech. As with other motion estimation approaches, using tagged MRI to measure 3D motion includes several preprocessing steps that affect the quality and accuracy of estimation...
February 11, 2017: Proceedings of SPIE
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