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https://www.readbyqxmd.com/read/29349447/theoretical-study-on-the-charge-transport-in-single-crystals-of-tcnq-f2-tcnq-and-f4-tcnq
#1
Li-Fei Ji, Jian-Xun Fan, Shou-Feng Zhang, Ai-Min Ren
2,5-Difluoro-7,7,8,8-tetracyanoquinodimethane (F2-TCNQ) was recently reported to display excellent electron transport properties in single crystal field-effect transistors (FETs). Its carrier mobility can reach 25 cm2 V-1 s-1 in devices. However, its counterparts TCNQ and F4-TCNQ (tetrafluoro-7,7,8,8-tetracyanoquinodimethane) do not exhibit the same highly efficient behavior. To better understand this significant difference in charge carrier mobility, a multiscale approach combining semiclassical Marcus hopping theory, a quantum nuclear enabled hopping model and molecular dynamics simulations was performed to assess the electron mobilities of the Fn-TCNQ (n = 0, 2, 4) systems in this work...
January 19, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29345192/cross-validation-of-the-dot-counting-test-in-a-large-sample-of-credible-and-non-credible-patients-referred-for-neuropsychological-testing
#2
Courtney McCaul, Kyle B Boone, Annette Ermshar, Maria Cottingham, Tara L Victor, Elizabeth Ziegler, Michelle A Zeller, Matthew Wright
OBJECTIVE: To cross-validate the Dot Counting Test in a large neuropsychological sample. METHOD: Dot Counting Test scores were compared in credible (n = 142) and non-credible (n = 335) neuropsychology referrals. RESULTS: Non-credible patients scored significantly higher than credible patients on all Dot Counting Test scores. While the original E-score cut-off of ≥17 achieved excellent specificity (96.5%), it was associated with mediocre sensitivity (52...
January 18, 2018: Clinical Neuropsychologist
https://www.readbyqxmd.com/read/29331318/developmental-changes-in-the-feedback-related-negativity-from-8-to-14%C3%A2-years
#3
Yael Arbel, Kayleigh N McCarty, Mark Goldman, Emanuel Donchin, Ty Brumback
The study examined age related changes in the magnitude of the Feedback Related Negativity (FRN) in 8-14 year old children performing a variation of a Go/No-Go task. Participants were presented with four stimuli and tasked with mapping each of them either to a response or to a "no response" by trial and error guided by feedback. Feedback was valid for two stimuli (Go and No-Go) and invalid (.5 positive; .5 negative feedback) for the other two stimuli. The amplitude of the FRN was evaluated as a function of age separately for Go and No-Go trials...
January 10, 2018: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/29330763/safe-and-sensible-preprocessing-and-baseline-correction-of-pupil-size-data
#4
Sebastiaan Mathôt, Jasper Fabius, Elle Van Heusden, Stefan Van der Stigchel
Measurement of pupil size (pupillometry) has recently gained renewed interest from psychologists, but there is little agreement on how pupil-size data is best analyzed. Here we focus on one aspect of pupillometric analyses: baseline correction, i.e., analyzing changes in pupil size relative to a baseline period. Baseline correction is useful in experiments that investigate the effect of some experimental manipulation on pupil size. In such experiments, baseline correction improves statistical power by taking into account random fluctuations in pupil size over time...
January 12, 2018: Behavior Research Methods
https://www.readbyqxmd.com/read/29320504/evaluation-of-the-practicability-and-virological-performance-of-finger-stick-whole-blood-hiv-self-testing-in-french-speaking-sub-saharan-africa
#5
Serge Tonen-Wolyec, Salomon Batina-Agasa, Jérémie Muwonga, Franck Fwamba N'kulu, Ralph-Sydney Mboumba Bouassa, Laurent Bélec
BACKGROUND: Opportunities for HIV testing could be enhanced by offering HIV self-testing (HIVST) in populations that fear stigma and discrimination when accessing conventional HIV counselling and testing in health care facilities. Field experience with HIVST has not yet been reported in French-speaking African countries. METHODS: The practicability of HIVST was assessed using the prototype the Exacto® Test HIV (Biosynex, Strasbourg, France) self-test in 322 adults living in Kisangani and Bunia, Democratic Republic of the Congo, according to World Health Organization's recommendations...
2018: PloS One
https://www.readbyqxmd.com/read/29318665/ternary-system-with-controlled-structure-a-new-strategy-toward-efficient-organic-photovoltaics
#6
Pei Cheng, Rui Wang, Jingshuai Zhu, Wenchao Huang, Sheng-Yung Chang, Lei Meng, Pengyu Sun, Hao-Wen Cheng, Meng Qin, Chenhui Zhu, Xiaowei Zhan, Yang Yang
Recently, a new type of active layer with a ternary system has been developed to further enhance the performance of binary system organic photovoltaics (OPV). In the ternary OPV, almost all active layers are formed by simple ternary blend in solution, which eventually leads to the disordered bulk heterojunction (BHJ) structure after a spin-coating process. There are two main restrictions in this disordered BHJ structure to obtain higher performance OPV. One is the isolated second donor or acceptor domains. The other is the invalid metal-semiconductor contact...
January 10, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29305304/sleeve-gastrectomy-surgery-when-2-alcoholic-drinks-are-converted-to-4
#7
María Belén Acevedo, J Christopher Eagon, Bruce D Bartholow, Samuel Klein, Kathleen K Bucholz, Marta Yanina Pepino
BACKGROUND: While it is well established that Roux-en-Y gastric bypass (RYGB) causes a rapid and heightened peak blood alcohol concentration (BAC), results from previous studies on the effects of sleeve gastrectomy (SG) on alcohol pharmacokinetics are conflicting. Data from 2 studies found SG did not affect BAC, whereas another study found SG caused a heightened peak BAC after alcohol ingestion. Moreover, these 3 studies estimated BAC from breathalyzers, which might not reliably estimate peak BAC...
November 10, 2017: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/29284370/a-test-of-inflated-zeros-for-poisson-regression-models
#8
Hua He, Hui Zhang, Peng Ye, Wan Tang
Excessive zeros are common in practice and may cause overdispersion and invalidate inference when fitting Poisson regression models. There is a large body of literature on zero-inflated Poisson models. However, methods for testing whether there are excessive zeros are less well developed. The Vuong test comparing a Poisson and a zero-inflated Poisson model is commonly applied in practice. However, the type I error of the test often deviates seriously from the nominal level, rendering serious doubts on the validity of the test in such applications...
January 1, 2017: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/29262304/effects-of-central-and-peripheral-cueing-on-perceptual-and-saccade-performance
#9
Tobias Moehler, Katja Fiehler
Previous research on the spatiotemporal dynamics of exogenous and endogenous attentional allocation during saccade preparation yielded conflicting results. We hypothesize that this can be explained by the cueing type used to orient attention in a perceptual task. We investigated the time-course of attentional allocation as a function of cueing type (central vs peripheral), spatial congruency of the cued perceptual and saccade task locations, and cue validity in a dual-task paradigm. Participants performed a visual discrimination task during saccade preparation...
December 17, 2017: Vision Research
https://www.readbyqxmd.com/read/29250816/bartlett-type-corrections-and-bootstrap-adjustments-of-likelihood-based-inference-methods-for-network-meta-analysis
#10
Hisashi Noma, Kengo Nagashima, Kazushi Maruo, Masahiko Gosho, Toshi A Furukawa
In network meta-analyses that synthesize direct and indirect comparison evidence concerning multiple treatments, multivariate random effects models have been routinely used for addressing between-studies heterogeneities. Although their standard inference methods depend on large sample approximations (eg, restricted maximum likelihood estimation) for the number of trials synthesized, the numbers of trials are often moderate or small. In these situations, standard estimators cannot be expected to behave in accordance with asymptotic theory; in particular, confidence intervals cannot be assumed to exhibit their nominal coverage probabilities (also, the type I error probabilities of the corresponding tests cannot be retained)...
December 18, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/29247854/combined-attention-controls-complex-behavior-by-suppressing-unlikely-events
#11
Christopher D Blair, Jelena Ristic
Attention enables behavior by modulating both sensory inputs and task goals. Combining attentional resources from both of those sources exerts qualitatively large effects on manual performance. Here we tested how combined attention was represented in sensory processing, as reflected by the P1 component and associated activity in the alpha band. We measured performance and recorded EEG while participants' attention was engaged in an automated, endogenous, and combined (i.e., automated and endogenous) manner...
December 13, 2017: Brain and Cognition
https://www.readbyqxmd.com/read/29237431/a-case-of-herbicide-induced-acute-fibrinous-and-organizing-pneumonia
#12
Shengsong Chen, Hong Zhou, Lingling Yu, Bo Tong, Zuke Xiao, Sisi Fan
BACKGROUND: To improve the understanding of acute fibrinous and organizing pneumonia (AFOP), we present one case of AFOP proven by percutaneous lung biopsy along with clinical features, chest imaging and pathology. CASE PRESENTATION: A 50-year-old man was admitted to our department after he was given empiric therapy for community-acquired pneumonia (CAP). The clinical symptoms of the patient were dry cough, chills, night sweats and high fevers. Chest computed tomography (CT) scan showed a high-density shadow in the right lung lobe, similar to lobular pneumonia...
December 13, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/29227127/symptom-and-performance-validity-with-veterans-assessed-for-attention-deficit-hyperactivity-disorder-adhd
#13
Robert D Shura, John H Denning, Holly M Miskey, Jared A Rowland
Little is known about attention-deficit/hyperactivity disorder (ADHD) in veterans. Practice standards recommend the use of both symptom and performance validity measures in any assessment, and there are salient external incentives associated with ADHD evaluation (stimulant medication access and academic accommodations). The purpose of this study was to evaluate symptom and performance validity measures in a clinical sample of veterans presenting for specialty ADHD evaluation. Patients without a history of a neurocognitive disorder and for whom data were available on all measures (n = 114) completed a clinical interview structured on DSM-5 ADHD symptoms, the Minnesota Multiphasic Personality Inventory-2-Restructured Form (MMPI-2-RF), and the Test of Memory Malingering Trial 1 (TOMM1) as part of a standardized ADHD diagnostic evaluation...
December 2017: Psychological Assessment
https://www.readbyqxmd.com/read/29227123/the-importance-of-assessing-for-validity-of-symptom-report-and-performance-in-attention-deficit-hyperactivity-disorder-adhd-introduction-to-the-special-section-on-noncredible-presentation-in-adhd
#14
Julie A Suhr, David T R Berry
Invalid self-report and invalid performance occur with high base rates in attention deficit/hyperactivity disorder (ADHD; Harrison, 2006; Musso & Gouvier, 2014). Although much research has focused on the development and validation of symptom validity tests (SVTs) and performance validity tests (PVTs) for psychiatric and neurological presentations, less attention has been given to the use of SVTs and PVTs in ADHD evaluation. This introduction to the special section describes a series of studies examining the use of SVTs and PVTs in adult ADHD evaluation...
December 2017: Psychological Assessment
https://www.readbyqxmd.com/read/29217940/audit-of-oral-histopathology-service-at-a-nigerian-tertiary-institution-over-a-24-year-period
#15
Akindayo O Akinyamoju, Bukola F Adeyemi, Akinyele O Adisa, Chidinma N Okoli
Background: Biopsies are often essential for definitive diagnosis of oro-facial lesions and are a part of oral diagnostic procedures carried out in histopathology laboratories. At present, there is paucity of literature on the audit of oral histopathology services in Nigeria. The objectives of this study were to determine the prevalence of biopsied oral lesions in a Nigerian tertiary institution. Also to profile the usage of oral pathology service and to identify challenges that may be present in an oral histodiagnostic service...
July 2017: Ethiopian Journal of Health Sciences
https://www.readbyqxmd.com/read/29201604/improved-3d-measurement-with-a-novel-preprocessing-method-in-dfp
#16
Yi Xiao, You-Fu Li
Shadow and background are two common factors in digital fringe projection, which lead to ambiguity in three-dimensional measurement and thereby need to be seriously considered. Preprocessing is often needed to segment the object from invalid points. The existing segmentation approaches based on modulation normally perform well in pure dark background circumstances, which, however, lose accuracy in situations of white or complex background. In this paper, an accurate shadow and background removal technique is proposed, which segments the shadow by one threshold from modulation histogram and segments the background by the threshold in intensity histogram...
2017: Robotics and Biomimetics
https://www.readbyqxmd.com/read/29187249/interventions-to-increase-adherence-in-patients-taking-immunosuppressive-drugs-after-kidney-transplantation-a-systematic-review-of-controlled-trials
#17
Tim Mathes, Kirsten Großpietsch, Edmund A M Neugebauer, Dawid Pieper
BACKGROUND: Immunosuppressive drugs have to be taken through the whole duration of kidney transplant survival to avoid rejection. Low adherence can increase the risk of allograft rejection. The objective was to evaluate the effectiveness of adherence-enhancing interventions (AEI) in kidney transplantation recipients taking immunosuppressive drugs. METHODS: A search was performed in Medline, Embase, CINAHL, and PsycINFO. The search was performed in May 2016. We included comparative studies on AEI for kidney transplant recipients taking immunosuppressive drugs...
November 29, 2017: Systematic Reviews
https://www.readbyqxmd.com/read/29161350/embedded-performance-validity-tests-in-the-hopkins-verbal-learning-test-revised-and-the-brief-visuospatial-memory-test-revised-a-replication-study
#18
K Chase Bailey, Jason R Soble, Kathleen M Bain, Chrystal Fullen
Objective: Embedded performance validity tests (PVTs) within the Hopkins Verbal Learning Test-Revised (HVLT-R) and Brief Visuospatial Memory Test-Revised (BVMT-R) were recently identified. This study aimed to further validate/replicate these embedded PVTs. Method: Eighty clinically referred veterans who underwent neuropsychological evaluation were included. Validity groups were established by passing/failing 2-3 well-validated PVTs, with 75% (n = 60) classified as valid and 25% (n = 20) noncredible...
November 17, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/29154123/3d-skeletonization-feature-based-computer-aided-detection-system-for-pulmonary-nodules-in-ct-datasets
#19
Weihang Zhang, Xue Wang, Xuanping Li, Junfeng Chen
Pulmonary nodule detection has a significant impact on early diagnosis of lung cancer. To effectively detect pulmonary nodules from interferential vessels in chest CT datasets, this paper proposes a novel 3D skeletonization feature, named as voxels remove rate. Based on this feature, a computer-aided detection system is constructed to validate its performance. The system mainly consists of five stages. Firstly, the lung tissues are segmented by a global optimal active contour model, which can extract all structures (including juxta-pleural nodules) in the lung region...
November 11, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29145307/computed-tomography-guided-percutaneous-cutting-needle-biopsy-for-small-%C3%A2-20%C3%A2-mm-lung-nodules
#20
Guang-Chao Li, Yu-Fei Fu, Wei Cao, Yi-Bing Shi, Tao Wang
The goal of this study is to determine the feasibility, diagnostic accuracy, and risk factor of complications of computed tomography (CT)-guided percutaneous cutting needle biopsy (PCNB) for small lung nodules.From January 2014 to May 2015, 141 patients with small lung nodule were performed with CT-guided PCNB procedure. Data on technical success, diagnostic accuracy, and complication were collected and analyzed.Technical success of CT-guided PCNB for small lung nodules was 100%. A total of 141 nodules were punctured...
November 2017: Medicine (Baltimore)
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