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https://www.readbyqxmd.com/read/28732167/quantum-transport-and-subband-structure-of-modulation-doped-gaas-alas-core-superlattice-nanowires
#1
Dominik Irber, Jakob Seidl, Damon James Carrad, Jonathan Becker, Nari Jeon, Bernhard Loitsch, Julia Winnerl, Sonja Matich, Markus Döblinger, Yang Tang, Stefanie Morkötter, Gerhard Abstreiter, Jonathan J Finley, M Grayson, Lincoln Lauhon, Gregor Koblmueller
Modulation-doped III-V semiconductor nanowire (NW) heterostructures have recently emerged as promising candidates to host high-mobility electron channels for future high-frequency, low-energy transistor technologies. The one-dimensional geometry of NWs also makes them attractive for studying quantum confinement effects. Here, we report correlated investigations into the discrete electronic sub-band structure of confined electrons in the channel of Si delta-doped GaAs/AlAs core-superlattice NW heterostructures and the associated signatures in low-temperature transport...
July 21, 2017: Nano Letters
https://www.readbyqxmd.com/read/28732087/a-dissociation-between-engagement-and-learning-enthusiastic-instructions-fail-to-reliably-improve-performance-on-a-memory-task
#2
Benjamin A Motz, Joshua R de Leeuw, Paulo F Carvalho, Kaley L Liang, Robert L Goldstone
Despite widespread assertions that enthusiasm is an important quality of effective teaching, empirical research on the effect of enthusiasm on learning and memory is mixed and largely inconclusive. To help resolve these inconsistencies, we conducted a carefully-controlled laboratory experiment, investigating whether enthusiastic instructions for a memory task would improve recall accuracy. Scripted videos, either enthusiastic or neutral, were used to manipulate the delivery of task instructions. We also manipulated the sequence of learning items, replicating the spacing effect, a known cognitive technique for memory improvement...
2017: PloS One
https://www.readbyqxmd.com/read/28731965/functional-outcomes-post-lisfranc-injury-transarticular-screws-dorsal-bridge-plating-or-combination-treatment
#3
Simon Lau, Catherine Guest, Marcus Hall, Mark Tacey, Samuel Joseph, Andrew Oppy
OBJECTIVE: To identify whether transarticular screws, dorsal bridging plates or a combination of the 2 result in the best functional outcome after Lisfranc injury. DESIGN: Case series. SETTING: Level one trauma center. PATIENTS: Fifty patients who underwent surgical fixation of Lisfranc injuries over a 6-year period were retrospectively reviewed. INTERVENTION: One of 3 treatment arms: transarticular screw fixation alone, dorsal bridge plating alone or a combination of dorsal bridge and transarticular screw fixation...
August 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28731848/usability-acceptability-and-impact-of-a-pediatric-teledermatology-mobile-health-application
#4
Alexander G Fiks, Linda Fleisher, Lindsay Berrigan, Emily Sykes, Stephanie L Mayne, Rachel Gruver, Katherine Halkyard, Olivia S Jew, Patrick FitzGerald, Flaura Winston, Patrick McMahon
OBJECTIVE: Pediatric dermatology appointment wait times often exceed several months. We evaluated the usability, acceptability, and clinical impact of a store-and-forward teledermatology mobile application (app) linking families with pediatric dermatologists. METHODS: Parents of children age 6 weeks to 17 years or individuals 18-21 years old were invited (by e-mail or referral) to participate in this single group, prospective study. Within the app, users photographed the skin condition, answered questions, and submitted their case for review...
July 21, 2017: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/28731799/multispecies-coexistence-without-diffuse-competition-or-why-phylogenetic-signal-and-trait-clustering-weaken-coexistence
#5
Simon Maccracken Stump
Related and phenotypically similar species often compete more strongly than unrelated and dissimilar species. Much is unknown about the community-level implications of such complex interactions. Here, we study how they affect community dynamics differently from diffuse interactions (competing equally with all heterospecifics). We derive results for a model that applies to many forms of density dependence and also examine specific cases using a site-occupancy model of forest dynamics. The results indicate that nondiffuse competition produces three effects that will not occur under diffuse competition: first, the central niche effect-if a species has high niche overlap with several competitors, then its average fitness is reduced; second, the common competitor effect-if a species has high niche overlap with more common species, then its average fitness is reduced (these two effects are usually equalizing, because more favorable niches are likely to contain more species and more abundant species); and, finally, the community redistribution effect-when a species falls to low density, the relative abundance of its competitors will change, altering its ability to recover...
August 2017: American Naturalist
https://www.readbyqxmd.com/read/28731605/optimising-the-effectiveness-of-diabetes-education-in-an-east-asian-population
#6
T S T Choi, K Z Walker, C B Lombard, C Palermo
AIM: To explore the collective patterns of learning behaviours and preferences of Chinese people during diabetes education. The study was carried out across three countries and aimed to identify strategies that could be used to tailor diabetes education to Chinese people. METHODS: A case study approach was undertaken in three countries (Australia, China and Singapore) using participant observations and qualitative interviews. Purposive sampling was used to select field sites before a snowball technique was employed to identify relevant interviewees...
July 2017: Nutrition & Dietetics: the Journal of the Dietitians Association of Australia
https://www.readbyqxmd.com/read/28731591/a-sedation-protocol-with-fasting-and-shorter-sleep-leads-to-mri-success
#7
Takahisa Kimiya, Shinichiro Sekiguchi, Tatsuhiko Yagihashi, Mie Arai, Hirotaka Takahashi, Takao Takahashi
BACKGROUND: Young children undergoing magnetic resonance imaging (MRI) require sedation. In June 2013, Tokyo Metropolitan Ohtsuka Hospital (TMOH) introduced an oral sedation protocol for young children undergoing MRI; the protocol included instructions on fasting before sedation, and recommended a shorter duration of sleep the night before MRI. We compared the MRI success rate before and after the introduction of this protocol. METHODS: The eligible subjects were children under 3 years old who underwent MRI by appointment at TMOH between October 2012 and March 2014, under sedation with triclofos sodium...
July 21, 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28731374/trait-emotional-intelligence-related-to-bullying-in-elementary-school-children-and-to-victimization-in-boys
#8
Andrew A Peachey, Jeanne Wenos, Stephanie Baller
While Healthy People 2020 calls for a reduction of bullying among high school students as a public health priority, earlier intervention supported by Occupational Therapists may be warranted. The current study investigated the prevalence of bullying behaviors within an elementary school, compared the experiences of victims with those of perpetrators, and determined when and for whom Trait Emotional Intelligence is a predictor of bullying and victimization. Elementary school children ( n = 235) in Grades 3 to 5 completed the Forms of Bullying Scale-Victim, the Forms of Bullying Scale-Perpetrator, and the Trait Emotional Intelligence Questionnaire-Child Short Form...
July 1, 2017: OTJR: Occupation, Participation and Health
https://www.readbyqxmd.com/read/28731212/cross-validation-of-commercial-enzyme-linked-immunosorbent-assay-and-radioimmunoassay-for-porcine-c-peptide-concentration-measurements-in-non-human-primate-serum
#9
Sarah C Gresch, Lucas A Mutch, Jody L Janecek, Rebecca L Hegstad-Davies, Melanie L Graham
BACKGROUND: C-peptide concentration is widely used as a marker of insulin secretion and is especially relevant in evaluating islet graft function following transplantation, because its measurement is not confounded by the presence of exogenous insulin. To address the shortage of human islet donors, the use of porcine islets has been proposed as a possible solution and the stringent pig-to-non-human primate (NHP) model is often the most relevant for pre-clinical evaluation of the potential for diabetes reversal resulting from an islet xenograft...
July 21, 2017: Xenotransplantation
https://www.readbyqxmd.com/read/28731029/nrp2-is-sufficient-to-instruct-circuit-formation-of-mitral-cells-to-mediate-odour-induced-attractive-social-responses
#10
Kasumi Inokuchi, Fumiaki Imamura, Haruki Takeuchi, Ryang Kim, Hiroyuki Okuno, Hirofumi Nishizumi, Haruhiko Bito, Takefumi Kikusui, Hitoshi Sakano
Odour information induces various innate responses that are critical to the survival of the individual and for the species. An axon guidance molecule, Neuropilin 2 (Nrp2), is known to mediate targeting of olfactory sensory neurons (primary neurons), to the posteroventral main olfactory bulb (PV MOB) in mice. Here we report that Nrp2-positive (Nrp2(+)) mitral cells (MCs, second-order neurons) play crucial roles in transmitting attractive social signals from the PV MOB to the anterior part of medial amygdala (MeA)...
July 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28730747/study-of-the-prevalence-of-5-ht-2c-receptor-gene-polymorphisms-in-egyptian-patients-with-lifelong-premature-ejaculation
#11
M F Roaiah, Y I Elkhayat, L A Rashed, S F GamalEl Din, A M El Guindi, M A Abd El Salam
We investigated the prevalence of 5HT2C receptor gene polymorphisms in Egyptian patients with lifelong premature ejaculation. A total of 350 participants were enrolled in a prospective study. Two hundred and forty-five cases with lifelong premature ejaculation joined this study, in addition to 105 controls. We instructed the partners of the cases to measure the IELT of the first intercourse only using a stopwatch for 1 month. Genotyping was carried out at the end of the study. The results showed that the majority of the patients and controls were Cys/Cys...
July 21, 2017: Andrologia
https://www.readbyqxmd.com/read/28730666/weaning-of-proton-pump-inhibitors-in-patients-with-suspected-laryngopharyngeal-reflux-disease
#12
R Jun Lin, Shaum Sridharan, Libby J Smith, VyVy N Young, Clark A Rosen
OBJECTIVE: To evaluate the feasibility of a proton pump inhibitor (PPI) weaning protocol in a cohort of patients following successful empiric treatment for suspected laryngopharyngeal reflux disease (LPRD). STUDY DESIGN: Retrospective chart review. METHODS: LPRD patients were weaned from PPIs using a standardized weaning protocol. Symptom recurrence rate following PPI wean and present PPI use were determined. All numeric data were analyzed...
July 21, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28730500/partial-least-squares-regression-models-for-the-analysis-of-kinase-signaling
#13
Danielle L Bourgeois, Pamela K Kreeger
Partial least squares regression (PLSR) is a data-driven modeling approach that can be used to analyze multivariate relationships between kinase networks and cellular decisions or patient outcomes. In PLSR, a linear model relating an X matrix of dependent variables and a Y matrix of independent variables is generated by extracting the factors with the strongest covariation. While the identified relationship is correlative, PLSR models can be used to generate quantitative predictions for new conditions or perturbations to the network, allowing for mechanisms to be identified...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28730450/crispr-cas-rna-scaffolds-for-transcriptional-programming-in-yeast
#14
Jesse G Zalatan
CRISPR scaffold RNAs (scRNAs) provide a modular system for locus-specific transcriptional programming. scRNAs are generated by extending CRISPR guide RNA sequences with domains that recruit RNA-binding proteins, thus physically linking DNA binding and protein recruitment activities. A single scRNA molecule encodes information about the target locus and instructions about what regulatory function to execute at that locus. Sets of scRNA constructs can be used to generate synthetic multigene transcriptional programs in which some genes are activated and others are repressed...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28729742/can-principals-promote-teacher-development-as-evaluators-a-case-study-of-principals-views-and-experiences
#15
Matthew A Kraft, Allison Gilmour
PURPOSE: New teacher evaluation systems have expanded the role of principals as instructional leaders, but little is known about principals' ability to promote teacher development through the evaluation process. We conducted a case study of principals' perspectives on evaluation and their experiences implementing observation and feedback cycles to better understand whether principals feel as though they are able to promote teacher development as evaluators. RESEARCH METHODS: We conducted interviews with a stratified random sample of 24 principals in an urban district that recently implemented major reforms to its teacher evaluation system...
December 2016: Educational Administration Quarterly: EAQ
https://www.readbyqxmd.com/read/28729620/self-management-behaviour-and-support-among-primary-care-copd-patients-cross-sectional-analysis-of-data-from-the-birmingham-chronic-obstructive-pulmonary-disease-cohort
#16
Ainee Khan, Andrew P Dickens, Peymane Adab, Rachel E Jordan
Self-management support for chronic obstructive pulmonary disease (COPD) patients is recommended by UK national guidelines, but extent of implementation is unknown. We aimed to describe self-management behaviour and support among COPD patients and explore behaviour associated with having a self-management plan. We undertook cross-sectional analysis of self-reported data from diagnosed COPD patients in the Birmingham COPD Cohort study. Questionnaire items relevant to self-management behaviour, knowledge of COPD, receipt of self-management plans and advice from healthcare professionals were examined...
July 20, 2017: NPJ Primary Care Respiratory Medicine
https://www.readbyqxmd.com/read/28729234/mobile-phone-supported-physiotherapy-for-frozen-shoulder-feasibility-assessment-based-on-a-usability-study
#17
Thomas Stütz, Gerlinde Emsenhuber, Daniela Huber, Michael Domhardt, Martin Tiefengrabner, Gertie Janneke Oostingh, Ulrike Fötschl, Nicholas Matis, Simon Ginzinger
BACKGROUND: Patients with frozen shoulder show limited shoulder mobility often accompanied by pain. Common treatment methods include physiotherapy, pain medication, administration of corticosteroids, and surgical capsulotomy. Frozen shoulder often lasts from months to years and mostly affects persons in the age group of 40 to 70 years. It severely reduces the quality of life and the ability to work. OBJECTIVE: The objective of this study was to evaluate the feasibility of a mobile health (mHealth) intervention that supports patients affected by "stage two" frozen shoulder...
July 20, 2017: JMIR Rehabil Assist Technol
https://www.readbyqxmd.com/read/28728800/-cross-cultural-adaptation-of-the-pedsql-questionnaire-cancer-module-version-3-0-for-use-in-colombia
#18
Luis Fernando Fontibón, Sandra Liliana Ardila, Ricardo Sánchez
INTRODUCTION: Quality of life is an important outcome in paediatric cancer patients. Its evaluation at different times during the clinical course of the disease is essential for clinical practice focused on the needs of the patients. There is not a specific assessment tool for this purpose in Colombia. OBJECTIVE: To perform the cultural adaptation of the quality of life scale PedsQL (Paediatric Quality of Life) Cancer Module, Version 3.0 for use in Colombia. METHODS: Permission for use of the scale was obtained and the algorithm steps of the Mapi Research Trust group were followed: Direct and independent translations of scale by two native Colombian Spanish speaking translators, obtaining a preliminary version from the translations...
July 2017: Revista Colombiana de Psiquiatría
https://www.readbyqxmd.com/read/28728427/postdrome-symptoms-in-pediatric-migraine-a-questionnaire-retrospective-study-by-phone-in-100-patients
#19
Ouardia Mamouri, Jean-Christophe Cuvellier, Alain Duhamel, Louis Vallée, Sylvie Nguyen The Tich
Background No study dedicated to postdrome symptoms of migraine attacks is available in children and adolescents. Objective To study the resolution phase of the migraine attack in children and adolescents. Methods 100 children and adolescents with ICHD-3 beta migraine without and/or with typical aura were included. Each patient, and one of her/his parents, were interviewed by phone about the postdrome phrase of their last six months' migraine attacks. They were specifically instructed to distinguish symptoms that had begun before and went on after migraine headache cessation (referred to as persistent symptoms), and symptoms whose onset was strictly after headache cessation (referred to as true postdromes)...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28727773/the-tradition-algorithm-approach-underestimates-the-prevalence-of-serodiagnosis-of-syphilis-in-hiv-infected-individuals
#20
Bin Chen, Xiuming Peng, Tiansheng Xie, Changzhong Jin, Fumin Liu, Nanping Wu
Currently, there are three algorithms for screening of syphilis: traditional algorithm, reverse algorithm and European Centre for Disease Prevention and Control (ECDC) algorithm. To date, there is not a generally recognized diagnostic algorithm. When syphilis meets HIV, the situation is even more complex. To evaluate their screening performance and impact on the seroprevalence of syphilis in HIV-infected individuals, we conducted a cross-sectional study included 865 serum samples from HIV-infected patients in a tertiary hospital...
July 20, 2017: PLoS Neglected Tropical Diseases
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