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https://www.readbyqxmd.com/read/29342307/using-phylogenomic-data-to-explore-the-effects-of-relaxed-clocks-and-calibration-strategies-on-divergence-time-estimation-primates-as-a-test-case
#1
Mario Dos Reis, Gregg F Gunnell, José Barba-Montoya, Alex Wilkins, Ziheng Yang, Anne D Yoder
Primates have long been a test case for the development of phylogenetic methods for divergence time estimation. Despite a large number of studies, however, the timing of origination of crown Primates relative to the K-Pg boundary and the timing of diversification of the main crown groups remain controversial. Here we analysed a dataset of 372 taxa (367 Primates and 5 outgroups, 3.4 million aligned base pairs) that includes nine primate genomes. We systematically explore the effect of different interpretations of fossil calibrations and molecular clock models on primate divergence time estimates...
January 12, 2018: Systematic Biology
https://www.readbyqxmd.com/read/29342272/daily-decision-making-about-food-during-pregnancy-a-new-zealand-study
#2
Susan Pullon, Angela Ballantyne, Lindsay Macdonald, Christine Barthow, Kristin Wickens, Julian Crane
Pregnancy has always been a life-changing event for women and their families, but societal concern about pregnancy and motherhood has become intense in the digital age. The role of health promotion agencies and others supplying health-related resources about lifestyle behaviours is both important and in need of scrutiny. Ever increasing advice for pregnant women, their families and health professionals, abounds. This study of decision making during pregnancy investigated how women made everyday decisions during pregnancy about food and drink, as well as dietary supplements and medications, alcohol and recreational drugs...
January 12, 2018: Health Promotion International
https://www.readbyqxmd.com/read/29342153/the-impact-of-optic-nerve-and-related-characteristics-on-disc-area-measurements-derived-from-different-imaging-techniques
#3
Michael Yapp, George Rennie, Michael P Hennessy, Michael Kalloniatis, Barbara Zangerl
PURPOSE: Optic nerve head (ONH) assessment and its interpretation in healthy patients and those with glaucoma remains a pivotal topic specifically considering rapid advancements in imaging technologies. We undertook a large-scale, mixed cohort, comparative study to assess the correlation of optic disc measurements between different imaging modalities and investigated the impact of patient and disc associated parameters. METHODS: ONH sizes were obtained from one randomly selected eye of each of 209 patients using stereophotography, confocal scanning laser ophthalmoscopy and two different optical coherence tomographers (OCT)...
2018: PloS One
https://www.readbyqxmd.com/read/29341969/pursuing-normality-reflections-on-cancer-survivorship-care-of-lymphoma-survivors
#4
Louise S Madsen, Charlotte Handberg
BACKGROUND: The present study explored the reflections on cancer survivorship care of lymphoma survivors in active treatment. Lymphoma survivors have survivorship care needs, yet their participation in cancer survivorship care programs is still reported as low. OBJECTIVE: The aim of this study was to understand the reflections on cancer survivorship care of lymphoma survivors to aid the future planning of cancer survivorship care and overcome barriers to participation...
January 16, 2018: Cancer Nursing
https://www.readbyqxmd.com/read/29341937/correction-for-opening-the-black-box-of-electronic-health-collecting-analyzing-and-interpreting-log-data
#5
Floor Sieverink, Saskia Kelders, Mannes Poel, Lisette van Gemert-Pijnen
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January 17, 2018: JMIR Research Protocols
https://www.readbyqxmd.com/read/29341789/psychometric-properties-of-the-epworth-sleepiness-scale-a-factor-analysis-and-item-response-theory-approach
#6
June J Pilcher, Fred S Switzer, Alec Munc, Janet Donnelly, Julia C Jellen, Claus Lamm
The purpose of this study is to examine the psychometric properties of the Epworth Sleepiness Scale (ESS) in two languages, German and English. Students from a university in Austria (N = 292; 55 males; mean age = 18.71 ± 1.71 years; 237 females; mean age = 18.24 ± 0.88 years) and a university in the US (N = 329; 128 males; mean age = 18.71 ± 0.88 years; 201 females; mean age = 21.59 ± 2.27 years) completed the ESS. An exploratory-factor analysis was completed to examine dimensionality of the ESS...
January 17, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29341751/entanglement-in-nonunitary-quantum-critical-spin-chains
#7
Romain Couvreur, Jesper Lykke Jacobsen, Hubert Saleur
Entanglement entropy has proven invaluable to our understanding of quantum criticality. It is natural to try to extend the concept to "nonunitary quantum mechanics," which has seen growing interest from areas as diverse as open quantum systems, noninteracting electronic disordered systems, or nonunitary conformal field theory (CFT). We propose and investigate such an extension here, by focusing on the case of one-dimensional quantum group symmetric or supergroup symmetric spin chains. We show that the consideration of left and right eigenstates combined with appropriate definitions of the trace leads to a natural definition of Rényi entropies in a large variety of models...
July 28, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341741/fractional-spin-and-josephson-effect-in-time-reversal-invariant-topological-superconductors
#8
Alberto Camjayi, Liliana Arrachea, Armando Aligia, Felix von Oppen
Time-reversal-invariant topological superconducting (TRITOPS) wires are known to host a fractional spin ℏ/4 at their ends. We investigate how this fractional spin affects the Josephson current in a TRITOPS-quantum dot-TRITOPS Josephson junction, describing the wire in a model that can be tuned between a topological and a nontopological phase. We compute the equilibrium Josephson current of the full model by continuous-time Monte Carlo simulations and interpret the results within an effective low-energy theory...
July 28, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341718/search-for-invisible-decays-of-a-dark-photon-produced-in-e-e-collisions-at-babar
#9
J P Lees, V Poireau, V Tisserand, E Grauges, A Palano, G Eigen, D N Brown, M Derdzinski, A Giuffrida, Yu G Kolomensky, M Fritsch, H Koch, T Schroeder, C Hearty, T S Mattison, J A McKenna, R Y So, V E Blinov, A R Buzykaev, V P Druzhinin, V B Golubev, E A Kravchenko, A P Onuchin, S I Serednyakov, Yu I Skovpen, E P Solodov, K Yu Todyshev, A J Lankford, J W Gary, O Long, A M Eisner, W S Lockman, W Panduro Vazquez, D S Chao, C H Cheng, B Echenard, K T Flood, D G Hitlin, J Kim, T S Miyashita, P Ongmongkolkul, F C Porter, M Röhrken, Z Huard, B T Meadows, B G Pushpawela, M D Sokoloff, L Sun, J G Smith, S R Wagner, D Bernard, M Verderi, D Bettoni, C Bozzi, R Calabrese, G Cibinetto, E Fioravanti, I Garzia, E Luppi, V Santoro, A Calcaterra, R de Sangro, G Finocchiaro, S Martellotti, P Patteri, I M Peruzzi, M Piccolo, M Rotondo, A Zallo, S Passaggio, C Patrignani, H M Lacker, B Bhuyan, U Mallik, C Chen, J Cochran, S Prell, H Ahmed, A V Gritsan, N Arnaud, M Davier, F Le Diberder, A M Lutz, G Wormser, D J Lange, D M Wright, J P Coleman, E Gabathuler, D E Hutchcroft, D J Payne, C Touramanis, A J Bevan, F Di Lodovico, R Sacco, G Cowan, Sw Banerjee, D N Brown, C L Davis, A G Denig, W Gradl, K Griessinger, A Hafner, K R Schubert, R J Barlow, G D Lafferty, R Cenci, A Jawahery, D A Roberts, R Cowan, S H Robertson, B Dey, N Neri, F Palombo, R Cheaib, L Cremaldi, R Godang, D J Summers, P Taras, G De Nardo, C Sciacca, G Raven, C P Jessop, J M LoSecco, K Honscheid, R Kass, A Gaz, M Margoni, M Posocco, G Simi, F Simonetto, R Stroili, S Akar, E Ben-Haim, M Bomben, G R Bonneaud, G Calderini, J Chauveau, G Marchiori, J Ocariz, M Biasini, E Manoni, A Rossi, G Batignani, S Bettarini, M Carpinelli, G Casarosa, M Chrzaszcz, F Forti, M A Giorgi, A Lusiani, B Oberhof, E Paoloni, M Rama, G Rizzo, J J Walsh, A J S Smith, F Anulli, R Faccini, F Ferrarotto, F Ferroni, A Pilloni, G Piredda, C Bünger, S Dittrich, O Grünberg, M Heß, T Leddig, C Voß, R Waldi, T Adye, F F Wilson, S Emery, G Vasseur, D Aston, C Cartaro, M R Convery, J Dorfan, W Dunwoodie, M Ebert, R C Field, B G Fulsom, M T Graham, C Hast, W R Innes, P Kim, D W G S Leith, S Luitz, D B MacFarlane, D R Muller, H Neal, B N Ratcliff, A Roodman, M K Sullivan, J Va'vra, W J Wisniewski, M V Purohit, J R Wilson, A Randle-Conde, S J Sekula, M Bellis, P R Burchat, E M T Puccio, M S Alam, J A Ernst, R Gorodeisky, N Guttman, D R Peimer, A Soffer, S M Spanier, J L Ritchie, R F Schwitters, J M Izen, X C Lou, F Bianchi, F De Mori, A Filippi, D Gamba, L Lanceri, L Vitale, F Martinez-Vidal, A Oyanguren, J Albert, A Beaulieu, F U Bernlochner, G J King, R Kowalewski, T Lueck, I M Nugent, J M Roney, R J Sobie, N Tasneem, T J Gershon, P F Harrison, T E Latham, R Prepost, S L Wu
We search for single-photon events in 53  fb^{-1} of e^{+}e^{-} collision data collected with the BABAR detector at the PEP-II B-Factory. We look for events with a single high-energy photon and a large missing momentum and energy, consistent with production of a spin-1 particle A^{'} through the process e^{+}e^{-}→γA^{'}; A^{'}→invisible. Such particles, referred to as "dark photons," are motivated by theories applying a U(1) gauge symmetry to dark matter. We find no evidence for such processes and set 90% confidence level upper limits on the coupling strength of A^{'} to e^{+}e^{-} in the mass range m_{A^{'}}≤8  GeV...
September 29, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341672/helicase-stepping-investigated-with-one-nucleotide-resolution-fluorescence-resonance-energy-transfer
#10
Wenxia Lin, Jianbing Ma, Daguan Nong, Chunhua Xu, Bo Zhang, Jinghua Li, Qi Jia, Shuoxing Dou, Fangfu Ye, Xuguang Xi, Ying Lu, Ming Li
Single-molecule Förster resonance energy transfer is widely applied to study helicases by detecting distance changes between a pair of dyes anchored to overhangs of a forked DNA. However, it has been lacking single-base pair (1-bp) resolution required for revealing stepping kinetics of helicases. We designed a nanotensioner in which a short DNA is bent to exert force on the overhangs, just as in optical or magnetic tweezers. The strategy improved the resolution of Förster resonance energy transfer to 0.5 bp, high enough to uncover differences in DNA unwinding by yeast Pif1 and E...
September 29, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29341616/stochasticity-of-pores-interconnectivity-in-li-o2-batteries-and-its-impact-on-the-variations-in-electrochemical-performance
#11
Amangeldi Torayev, José Alexis Rucci, Pieter M Magusin, Arnaud Demortiere, Vincent De Andrade, Clare P Grey, Céline Merlet, Alejandro A Franco
While large dispersions in electrochemical performance have been reported for lithium oxygen batteries in the literature, they have not been investigated in any depth. The variability in the results is often assumed to arise from differences in cell design, electrode structure, handling and cell preparation at different times. An accurate theoretical framework turns out to be needed to get a better insight into the mechanisms underneath and to interpreting experimental results. Here, we develop and use a pore network model to simulate the electrochemical performance of three-dimensionally resolved lithium-oxygen cathode mesostructures obtained from TXM nano-computed tomography images...
January 17, 2018: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/29341499/recommendations-on-diagnostic-tools-for-batrachochytrium-salamandrivorans
#12
V Thomas, M Blooi, P Van Rooij, S Van Praet, E Verbrugghe, E Grasselli, M Lukac, S Smith, F Pasmans, A Martel
Batrachochytrium salamandrivorans (Bsal) poses a major threat to amphibian, and more specifically caudata, diversity. Bsal is currently spreading through Europe, and mitigation measures aimed at stopping its spread and preventing its introduction into naïve environments are urgently needed. Screening for presence of Bsal and diagnosis of Bsal-induced disease in amphibians are essential core components of effective mitigation plans. Therefore, the aim of this study was to present an overview of all Bsal diagnostic tools together with their limitations and to suggest guidelines to allow uniform interpretation...
January 17, 2018: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/29341466/effects-of-intravenous-home-dobutamine-in-palliative-end-stage-heart-failure-on-quality-of-life-heart-failure-hospitalization-and-cost-expenditure
#13
Pieter Martens, Jan Vercammen, Wendy Ceyssens, Linda Jacobs, Evert Luwel, Herwig Van Aerde, Peter Potargent, Monique Renaers, Matthias Dupont, Wilfried Mullens
AIMS: In patients with palliative end-stage heart failure, interventions that could provide symptomatic relief and prevent hospital admissions are important. Ambulatory continuous intravenous inotropes have been advocated by guidelines for such a purpose. We sought to determine the effect of intravenous dobutamine on symptomatic status, hospital stay, mortality, and cost expenditure. METHODS AND RESULTS: All consecutive end-stage heart failure patients not amenable for advanced therapies and discharged with continuous intravenous home dobutamine from a single tertiary centre between April 2011 and January 2017 were retrospectively analysed...
January 17, 2018: ESC Heart Failure
https://www.readbyqxmd.com/read/29341386/at-the-core-of-reasoning-dissociating-deductive-and-non-deductive-load
#14
John P Coetzee, Martin M Monti
In recent years, neuroimaging methods have been used to investigate how the human mind carries out deductive reasoning. According to some, the neural substrate of language is integral to deductive reasoning. According to others, deductive reasoning is supported by a language-independent distributed network including left frontopolar and frontomedial cortices. However, it has been suggested that activity in these frontal regions might instead reflect non-deductive factors such as working memory load and general cognitive difficulty...
January 16, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29341344/the-medial-temporal-lobe-functional-connectivity-patterns-associated-with-forming-different-mental-representations
#15
Signy Sheldon, Brian Levine
The medial temporal lobes (MTL), and more specifically the hippocampus, are critical for forming mental representations of past experiences - autobiographical memories - and for forming other 'non-experienced' types of mental representations, such as imagined scenarios. How the MTL coordinate with other brain areas to create these different types of representations is not well understood. To address this issue, we performed a task-based functional connectivity analysis on a previously published dataset in which fMRI data were collected as participants created different types of mental representations under three conditions...
January 17, 2018: Hippocampus
https://www.readbyqxmd.com/read/29341341/prediction-of-activation-patterns-preceding-hallucinations-in-patients-with-schizophrenia-using-machine-learning-with-structured-sparsity
#16
Amicie de Pierrefeu, Thomas Fovet, Fouad Hadj-Selem, Tommy Löfstedt, Philippe Ciuciu, Stephanie Lefebvre, Pierre Thomas, Renaud Lopes, Renaud Jardri, Edouard Duchesnay
Despite significant progress in the field, the detection of fMRI signal changes during hallucinatory events remains difficult and time-consuming. This article first proposes a machine-learning algorithm to automatically identify resting-state fMRI periods that precede hallucinations versus periods that do not. When applied to whole-brain fMRI data, state-of-the-art classification methods, such as support vector machines (SVM), yield dense solutions that are difficult to interpret. We proposed to extend the existing sparse classification methods by taking the spatial structure of brain images into account with structured sparsity using the total variation penalty...
January 16, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29341238/temporal-trends-in-a-biomagnifying-contaminant-application-of-amino-acid-compound-specific-stable-nitrogen-isotope-analysis-to-the-interpretation-of-bird-mercury-levels
#17
Craig E Hebert, Brian N Popp
Temporal trends in levels of biomagnifying contaminants, such as mercury (Hg), in top predators can provide insights into changes in contaminant bioavailability through time. However, interpreting contaminant temporal trends in predators can be confounded by temporal changes in their diets which, in turn, could affect organism trophic position and exposure to biomagnifying contaminants. To address this issue, bulk stable nitrogen isotope analysis, i.e. analysis of whole tissue, is widely incorporated into contaminant monitoring programs for the estimation of organism trophic position...
January 17, 2018: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29341232/histological-features-and-outcome-of-inverted-type-a-melanocytic-nevi
#18
Soheil S Dadras, Jun Lu, Artur Zembowicz, Thomas J Flotte, Martin C Mihm
The presence of enlarged epithelioid/spindled nests located deep in the reticular dermis of a biphasic melanocytic neoplasm can mimic melanoma arising in a preexisting nevus, causing over-interpretation of malignancy. We aimed to define the clinicopathologic significance of epithelioid/spindled nests in melanocytic nevi. Retrospectively using clinical and histologic information, we characterized 121 patients with a single lesion showing epithelioid/spindled melanocytes in the reticular dermis or subcutaneous fat, surrounded by melanophages, sometimes blending in with the adnexa...
January 17, 2018: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/29341205/promotion-time-cure-rate-model-with-nonparametric-form-of-covariate-effects
#19
Tianlei Chen, Pang Du
Survival data with a cured portion are commonly seen in clinical trials. Motivated from a biological interpretation of cancer metastasis, promotion time cure model is a popular alternative to the mixture cure rate model for analyzing such data. The existing promotion cure models all assume a restrictive parametric form of covariate effects, which can be incorrectly specified especially at the exploratory stage. In this paper, we propose a nonparametric approach to modeling the covariate effects under the framework of promotion time cure model...
January 17, 2018: Statistics in Medicine
https://www.readbyqxmd.com/read/29341129/diagnosing-crime-and-diagnosing-disease-ii-visual-pattern-perception-and-diagnostic-accuracy
#20
Saty Satya-Murti, Joseph J Lockhart
Previously, we reviewed how general cognitive processes might be susceptible to bias across both forensic and clinical fields, and how interdisciplinary comparisons could reduce error. We discuss several examples of clinical tasks which are heavily dependent on visual processing, comparing them to eyewitness identification (EI). We review the "constructive" nature of visual processing, and how contextual factors influence both medical experts and witnesses in decision making and recall. Overall, studies suggest common cognitive factors uniting these visual tasks, in both their strengths and shortcomings...
January 16, 2018: Journal of Forensic Sciences
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