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https://www.readbyqxmd.com/read/28088008/instruments-evaluating-the-quality-of-the-clinical-learning-environment-in-nursing-education-a-systematic-review-of-psychometric-properties
#1
REVIEW
Irene Mansutti, Luisa Saiani, Luca Grassetti, Alvisa Palese
BACKGROUND: The clinical learning environment is fundamental to nursing education paths, capable of affecting learning processes and outcomes. Several instruments have been developed in nursing education, aimed at evaluating the quality of the clinical learning environments; however, no systematic review of the psychometric properties and methodological quality of these studies has been performed to date. OBJECTIVES: The aims of the study were: 1) to identify validated instruments evaluating the clinical learning environments in nursing education; 2) to evaluate critically the methodological quality of the psychometric property estimation used; and 3) to compare psychometric properties across the instruments available...
January 4, 2017: International Journal of Nursing Studies
https://www.readbyqxmd.com/read/28077912/emptyheaded-a-relational-engine-for-graph-processing
#2
Christopher R Aberger, Susan Tu, Kunle Olukotun, Christopher Ré
There are two types of high-performance graph processing engines: low- and high-level engines. Low-level engines (Galois, PowerGraph, Snap) provide optimized data structures and computation models but require users to write low-level imperative code, hence ensuring that efficiency is the burden of the user. In high-level engines, users write in query languages like datalog (SociaLite) or SQL (Grail). High-level engines are easier to use but are orders of magnitude slower than the low-level graph engines. We present EmptyHeaded, a high-level engine that supports a rich datalog-like query language and achieves performance comparable to that of low-level engines...
June 2016: Proceedings
https://www.readbyqxmd.com/read/28077830/-path-analysis-of-the-influence-of-hospital-ethical-climate-perceived-by-nurses-on-supervisor-trust-and-organizational-effectiveness
#3
Yoon Goo Noh, Myun Sook Jung
PURPOSE: The purpose of this study was to analyze the paths of influence that a hospital's ethical climate exerts on nurses' organizational commitment and organizational citizenship behavior, with supervisor trust as the mediating factor, and verify compatibility of the models in hospital nurses. METHODS: The sample consisted of 374 nurses recruited from four hospitals in 3 cities in Korea. The measurements included the Ethical Climate Questionnaire, Supervisor Trust Questionnaire, Organizational Commitment Questionnaire and Organizational Citizenship Behavior Questionnaire...
December 2016: Journal of Korean Academy of Nursing
https://www.readbyqxmd.com/read/28077828/-hospital-arrival-rate-within-golden-time-and-factors-influencing-prehospital-delays-among-patients-with-acute-myocardial-infarction
#4
Hye Mi Ahn, Hyeongsu Kim, Kun Sei Lee, Jung Hyun Lee, Hyo Seon Jeong, Soung Hoon Chang, Kyeong Ryong Lee, Sung Hea Kim, Eun Young Shin
PURPOSE: This research was done to identify the hospital arrival rate and factors related to prehospital delay in arriving at an emergency medical center within the golden time after symptom onset in patients with acute myocardial infarction (AMI). METHODS: Data used in the research was from the National Emergency Department Information System of the National Emergency Medical Center which reported that in 2014, 9,611 patients went to emergency medical centers for acute myocardial infarction...
December 2016: Journal of Korean Academy of Nursing
https://www.readbyqxmd.com/read/28073448/modeling-the-transport-pathways-of-harmful-algal-blooms-in-the-iberian-coast
#5
L Pinto, M Mateus, A Silva
The prediction of the path of harmful algal blooms (HABs) along the coast can be achieved using numerical models of ocean circulation in order to reproduce the hydrodynamics of the study area. With this setting, our work aimed at the (1) study of key past events to evaluate the model ability to reproduce the transport pathways of blooms along the Iberian coast, and (2) to assess the relevance of such strictly physical approach. The simulations described here rely on the advection of lagrangian elements after a point release in a hypothetical location for bloom initiation, and the subsequent assessment of the influence of the surface currents transport on the extent of the bloom...
March 2016: Harmful Algae
https://www.readbyqxmd.com/read/28068771/perturbation-approach-for-computing-infrared-spectra-of-the-local-mode-of-probe-molecules
#6
Rui-Jie Xue, Adam Grofe, He Yin, Zexing Qu, Jiali Gao, Hui Li
Linear and two-dimensional infrared (IR) spectroscopy of site-specific probe molecules provides an opportunity to gain a molecular-level understanding of the local hydrogen-bonding network, conformational dynamics, and long-range electrostatic interactions in condensed-phase and biological systems. A challenge in computation is to determine the time-dependent vibrational frequencies that incorporate explicitly both nuclear quantum effects of vibrational motions and an electronic structural representation of the potential energy surface...
January 10, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28065455/spatial-curvilinear-path-following-control-of-underactuated-auv-with-multiple-uncertainties
#7
Jianming Miao, Shaoping Wang, Zhiping Zhao, Yuan Li, Mileta M Tomovic
This paper ̇α investigates the problem of spatial curvilinear path following control of underactuated autonomous underwater vehicles (AUVs) with multiple uncertainties. Firstly, in order to design the appropriate controller, path following error dynamics model is constructed in a moving Serret-Frenet frame, and the five degrees of freedom (DOFs) dynamic model with multiple uncertainties is established. Secondly, the proposed control law is separated into kinematic controller and dynamic controller via back-stepping technique...
January 5, 2017: ISA Transactions
https://www.readbyqxmd.com/read/28063429/initial-mechanisms-for-the-unimolecular-decomposition-of-electronically-excited-bisfuroxan-based-energetic-materials
#8
Bing Yuan, Elliot R Bernstein
Unimolecular decomposition of energetic molecules, 3,3'-diamino-4,4'-bisfuroxan (labeled as A) and 4,4'-diamino-3,3'-bisfuroxan (labeled as B), has been explored via 226/236 nm single photon laser excitation/decomposition. These two energetic molecules, subsequent to UV excitation, create NO as an initial decomposition product at the nanosecond excitation energies (5.0-5.5 eV) with warm vibrational temperature (1170 ± 50 K for A, 1400 ± 50 K for B) and cold rotational temperature (<55 K). Initial decomposition mechanisms for these two electronically excited, isolated molecules are explored at the complete active space self-consistent field (CASSCF(12,12)/6-31G(d)) level with and without MP2 correction...
January 7, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28063301/ru-dye-grafted-cds-and-reduced-graphene-oxide-ru-cds-rgo-composite-an-efficient-and-photo-tuneable-electrode-material-for-solid-state-dye-sensitized-polymer-solar-cells
#9
Erum Nosheen, Syed Mujtaba Shah, Zafar Iqbal
This article provides a facile one step synthesis of CdS (cadmium sulphide) and CdS/rGO (reduced graphene oxide CdS nanocomposites) using DMF (N, N-Dimethyl formamide) both as a solvent and a reducing agent for the reduction of grapheme oxide. XRD (X-ray diffraction), FESEM (Field emission scanning electron microscopy), EDX (Elemental dispersive X-ray analysis), TEM (Transmission electron microscopy), UV-Vis (UV-visible) and Raman spectroscopy have been employed for the characterization of prepared samples...
December 30, 2016: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28059380/triggered-single-photon-emission-up-to-77k-from-ordered-array-of-surface-curvature-directed-mesa-top-gaas-ingaas-single-quantum-dots
#10
Jiefei Zhang, Siyuan Lu, Swarnabha Chattaraj, Anupam Madhukar
We demonstrate triggered single photon emission up to 77K from an ordered 5x8 array of InGaAs single quantum dots (SQDs). The SQDs are grown selectively on patterned mesa tops utilizing substrate-encoded size-reducing epitaxy (SESRE). It exploits designed surface-curvature stress gradients to preferentially direct atom migration from mesa sidewalls to the top during growth. The emission from the SQDs exhibits a g<sup>(2)</sup>(0) of 0.19 ± 0.03 at 8K and decent emission spectral uniformity (standard deviation <1% of emission wavelength)...
December 26, 2016: Optics Express
https://www.readbyqxmd.com/read/28059378/second-harmonic-generation-in-periodically-poled-thin-film-lithium-niobate-wafer-bonded-on-silicon
#11
Ashutosh Rao, Marcin Malinowski, Amirmahdi Honardoost, Javed Rouf Talukder, Payam Rabiei, Peter Delfyett, Sasan Fathpour
Second-order optical nonlinear effects (second-harmonic and sum-frequency generation) are demonstrated in the telecommunication band by periodic poling of thin films of lithium niobate wafer-bonded on silicon substrates and rib-loaded with silicon nitride channels to attain ridge waveguide with cross-sections of ~2 µm<sup>2</sup>. A nonlinear conversion of 8% is obtained with a pulsed input in 4 mm long waveguides. The choice of silicon substrate makes the platform potentially compatible with silicon photonics, and therefore may pave the path towards on-chip nonlinear and quantum-optic applications...
December 26, 2016: Optics Express
https://www.readbyqxmd.com/read/28053312/laser-guided-energetic-discharges-over-large-air-gaps-by-electric-field-enhanced-plasma-filaments
#12
Francis Théberge, Jean-François Daigle, Jean-Claude Kieffer, François Vidal, Marc Châteauneuf
Recent works on plasma channels produced during the propagation of ultrashort and intense laser pulses in air demonstrated the guiding of electric discharges along the laser path. However, the short plasma lifetime limits the length of the laser-guided discharge. In this paper, the conductivity and lifetime of long plasma channels produced by ultrashort laser pulses is enhanced efficiently over many orders of magnitude by the electric field of a hybrid AC-DC high-voltage source. The AC electric pulse from a Tesla coil allowed to stimulate and maintain the highly conductive channel during few milliseconds in order to guide a subsequent 500 times more energetic discharge from a 30-kV DC source...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28050966/chemical-and-structural-arrangement-of-the-trigonal-phase-in-gesbte-thin-films
#13
Antonio M Mio, Stefania M S Privitera, Valeria Bragaglia, Fabrizio Arciprete, Corrado Bongiorno, Raffaella Calarco, Emanuele Rimini
The thermal and electrical properties of phase change materials, mainly GeSbTe alloys, in the crystalline state strongly depend on their phase and on the associated degree of order. The switching of Ge atoms in superlattice structures with trigonal phase has been recently proposed to develop memories with reduced switching energy, in which two differently ordered crystalline phases are the logic states. A detailed knowledge of the stacking plane sequence, of the local composition and of the vacancy distribution is therefore crucial in order to understand the underlying mechanism of phase transformations in the crystalline state and to evaluate the retention properties...
January 4, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28050344/structural-networks-involved-in-attention-and-executive-functions-in-multiple-sclerosis
#14
Sara Llufriu, Eloy Martinez-Heras, Elisabeth Solana, Nuria Sola-Valls, Maria Sepulveda, Yolanda Blanco, Elena H Martinez-Lapiscina, Magi Andorra, Pablo Villoslada, Alberto Prats-Galino, Albert Saiz
Attention and executive deficits are disabling symptoms in multiple sclerosis (MS) that have been related to disconnection mechanisms. We aimed to investigate changes in structural connectivity in MS and their association with attention and executive performance applying an improved framework that combines high order probabilistic tractography and anatomical exclusion criteria postprocessing. We compared graph theory metrics of structural networks and fractional anisotropy (FA) of white matter (WM) connections or edges between 72 MS subjects and 38 healthy volunteers (HV) and assessed their correlation with cognition...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28049297/different-conical-intersections-control-nonadiabatic-photochemistry-of-fluorene-light-driven-molecular-rotary-motor-a-casscf-and-spin-flip-dft-study
#15
Yuanying Li, Fengyi Liu, Bin Wang, Qingqing Su, Wenliang Wang, Keiji Morokuma
We report the light-driven isomerization mechanism of a fluorene-based light-driven rotary motor (corresponding to Feringa's 2nd generation rotary motor, [M. M. Pollard et al., Org. Biomol. Chem. 6, 507-512 (2008)]) at the complete active space self-consistent field (CASSCF) and spin-flip time-dependent density functional theory (TDDFT) (SFDFT) levels, combined with the complete active space second-order perturbation theory (CASPT2) single-point energy corrections. The good consistence between the SFDFT and CASSCF results confirms the capability of SFDFT in investigating the photoisomerization step of the light-driven molecular rotary motor, and proposes the CASPT2//SFDFT as a promising and effective approach in exploring photochemical processes...
December 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28049003/cognitive-motor-interference-on-upper-extremity-motor-performance-in-a-robot-assisted-planar-reaching-task-among-patients-with-stroke
#16
Joon-Ho Shin, Gyulee Park, Duk Youn Cho
OBJECTIVE: To explore motor performance on two different cognitive tasks during robotic rehabilitation in which motor performance was longitudinally assessed. DESIGN: Prospective study SETTING: Rehabilitation hospital PARTICIPANTS: Patients with chronic stroke and upper extremity impairment (N=22) INTERVENTION: A total of 640 repetitions of robot-assisted planar reaching, five times a week for 4 weeks MAIN OUTCOME MEASURES: Longitudinal robotic evaluations regarding motor performance included smoothness, mean velocity, path error, and reach error by the type of cognitive task...
December 31, 2016: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28048794/su-f-i-54-spatial-resolution-studies-in-proton-ct-using-a-phase-ii-prototype-head-scanner
#17
Tia E Plautz, R P Johnson, H F-W Sadrozinski, A Zatserklyaniy, V Bashkirov, R F Hurley, R W Schulte, P Piersimoni, V Giacometti
PURPOSE: To characterize the modulation transfer function (MTF) of the pre-clinical (phase II) head scanner developed for proton computed tomography (pCT) by the pCT collaboration. To evaluate the spatial resolution achievable by this system. METHODS: Our phase II proton CT scanner prototype consists of two silicon telescopes that track individual protons upstream and downstream from a phantom, and a 5-stage scintillation detector that measures a combination of the residual energy and range of the proton...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048754/su-f-j-204-carbon-digitally-reconstructed-radiography-cdrr-a-gpu-based-tool-for-fast-and-versatile-carbonimaging-simulation
#18
M F Dias, J Seco, G Baroni, M Riboldi
PURPOSE: Research in carbon imaging has been growing over the past years, as a way to increase treatment accuracy and patient positioning in carbon therapy. The purpose of this tool is to allow a fast and flexible way to generate CDRR data without the need to use Monte Carlo (MC) simulations. It can also be used to predict future clinically measured data. METHODS: A python interface has been developed, which uses information from CT or 4DCT and thetreatment calibration curve to compute the Water Equivalent Path Length (WEPL) of carbon ions...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048531/we-f-204-02-a-research-career-in-medical-physics-from-student-to-faculty
#19
M Giger
: In recent years heavy focus has been placed on clinical careers in medical physics, and the pathways to such careers are well-known and well-described. For the future advancement of the field of medical physics, it is necessary the focus also include research-oriented careers. It is important for the younger generation of medical physicists to know that there are many career opportunities in research, and that it is quite possible to build a successful career in which research is a major component...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048528/we-h-206-01-photoacoustic-tomography-multiscale-imaging-from-organelles-to-patients-by-ultrasonically-beating-the-optical-diffusion-limit
#20
L Wang
: Lihong V. Wang: Photoacoustic tomography (PAT), combining non-ionizing optical and ultrasonic waves via the photoacoustic effect, provides in vivo multiscale functional, metabolic, and molecular imaging. Broad applications include imaging of the breast, brain, skin, esophagus, colon, vascular system, and lymphatic system in humans or animals. Light offers rich contrast but does not penetrate biological tissue in straight paths as x-rays do. Consequently, high-resolution pure optical imaging (e...
June 2016: Medical Physics
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