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https://www.readbyqxmd.com/read/29053297/quantum-emitters-in-two-dimensional-structured-reservoirs-in-the-nonperturbative-regime
#1
A González-Tudela, J I Cirac
We show that the coupling of quantum emitters to a two-dimensional reservoir with a simple band structure gives rise to exotic quantum dynamics with no analogue in other scenarios and which cannot be captured by standard perturbative treatments. In particular, for a single quantum emitter with its transition frequency in the middle of the band, we predict an exponential relaxation at a rate different from that predicted by Fermi's golden rule, followed by overdamped oscillations and slow relaxation decay dynamics...
October 6, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/29053225/histological-outcomes-of-anal-high-grade-cytopredictions
#2
Jennifer Margaret Roberts, Fengyi Jin, Isobel Mary Poynten, Carmella Law, David James Templeton, Julia Kathleen Thurloe, Suzanne Marie Garland, Andrew Edwin Grulich, Annabelle Farnsworth, Richard John Hillman
BACKGROUND: Longitudinal studies of histological outcomes after anal cytological screening in men who have sex with men (MSM) are rare. This study measured the positive predictive values (PPVs) of each level of baseline cytological abnormality in MSM in Sydney, Australia, over a 12-month period. METHODS: The Study of the Prevention of Anal Cancer is a 3-year prospective study of the natural history of anal human papillomavirus infection in MSM at least 35 years old...
October 20, 2017: Cancer
https://www.readbyqxmd.com/read/29052630/mastering-the-game-of-go-without-human-knowledge
#3
David Silver, Julian Schrittwieser, Karen Simonyan, Ioannis Antonoglou, Aja Huang, Arthur Guez, Thomas Hubert, Lucas Baker, Matthew Lai, Adrian Bolton, Yutian Chen, Timothy Lillicrap, Fan Hui, Laurent Sifre, George van den Driessche, Thore Graepel, Demis Hassabis
A long-standing goal of artificial intelligence is an algorithm that learns, tabula rasa, superhuman proficiency in challenging domains. Recently, AlphaGo became the first program to defeat a world champion in the game of Go. The tree search in AlphaGo evaluated positions and selected moves using deep neural networks. These neural networks were trained by supervised learning from human expert moves, and by reinforcement learning from self-play. Here we introduce an algorithm based solely on reinforcement learning, without human data, guidance or domain knowledge beyond game rules...
October 18, 2017: Nature
https://www.readbyqxmd.com/read/29050703/validity-of-the-edinburgh-claudication-questionnaire-for-diagnosis-of-peripheral-artery-disease-in-patients-with-type-2-diabetes
#4
Salvador Pita-Fernández, María José Modroño-Freire, Sonia Pértega-Díaz, Lizbeth Herrera-Díaz, Teresa Seoane-Pillado, Adriana Paz-Solís, José Luis Varela Modroño
OBJECTIVE: To assess the prevalence of peripheral artery disease and the validity of clinical signs for its diagnosis in patients with type 2 diabetes. METHODS: Setting: Health center (Mariñamansa,Orense). PERIOD: January 2011-January 2013. INCLUSION CRITERIA: Patients with type 2 diabetes, informed consent. MEASUREMENTS: Age, sex, diabetes duration, body mass index, Charlson index, blood pressure, ankle-brachial index (ABI), cholesterol levels, smoking...
November 2017: Endocrinología, diabetes y nutrición
https://www.readbyqxmd.com/read/29049929/aggression-emotional-self-regulation-attentional-bias-and-cognitive-inhibition-predict-risky-driving-behavior
#5
Susan Raouf Hadadi Sani, Zahra Tabibi, Javad Salehi Fadardi, Despina Stavrinos
The present study explored whether aggression, emotional regulation, cognitive inhibition, and attentional bias towards emotional stimuli were related to risky driving behavior (driving errors, and driving violations). A total of 117 applicants for taxi driver positions (89% male, M age=36.59years, SD=9.39, age range 24-62years) participated in the study. Measures included the Ahwaz Aggression Inventory, the Difficulties in emotion regulation Questionnaire, the emotional Stroop task, the Go/No-go task, and the Driving Behavior Questionnaire...
October 16, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/29049216/fondaparinux-is-effective-for-acute-portal-vein-thrombosis-in-decompensated-cirrhotic-patients
#6
Zhi-Hao Zhang, Jing-Wen Zhang, Ping He, Yan Zhou, Chang-Yu Sun
Portal vein thrombosis (PVT) is a rare but serious complication in the decompensated stage of cirrhosis, and recurrent upper gastrointestinal bleeding and refractory ascites can occur in such patients. In decompensated cirrhotic patients, the application of conventional anticoagulant therapy is limited due to severe coagulation disorders, thrombocytopenia, and history of gastrointestinal bleeding.In this study, we sought to investigate the effect of fondaparinux on acute PVT in decompensated cirrhotic patients...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29048993/personalized-risk-prediction-in-clinical-oncology-research-applications-and-practical-issues-using-survival-trees-and-random-forests
#7
Chen Hu, Jon Arni Steingrimsson
A crucial component of making individualized treatment decisions is to accurately predict each patient's disease risk. In clinical oncology, disease risks are often measured through time-to-event data, such as overall survival and progression/recurrence-free survival, and are often subject to censoring. Risk prediction models based on recursive partitioning methods are becoming increasingly popular largely due to their ability to handle nonlinear relationships, higher-order interactions, and/or high-dimensional covariates...
October 19, 2017: Journal of Biopharmaceutical Statistics
https://www.readbyqxmd.com/read/29048219/immunohistochemistry-in-peritoneal-mesothelioma-a-single-center-experience-of-244-cases
#8
Radhika Tandon, Yuis Jimenez-Cortez, Robert Taub, Alain C Borczuk
CONTEXT: - Diagnosis of malignant mesothelioma is more common in the chest than it is in the abdomen. Most published immunohistochemistry data are more applicable to pleural than to peritoneal mesothelioma. OBJECTIVE: - To clarify the practical utility of 17 immunohistochemistry markers in the differential diagnosis of peritoneal mesothelioma with an emphasis on stains for which there is either contradictory information or a paucity of literature. DESIGN: - Consultation files of peritoneal mesothelioma diagnoses rendered from 1999 to 2014 were reviewed; 242 cases are identified...
October 19, 2017: Archives of Pathology & Laboratory Medicine
https://www.readbyqxmd.com/read/29046004/-coronary-computed-tomography-angiography-in-patients-with-stable-coronary-artery-disease
#9
Helen Ullrich, Tommaso Gori
The guidelines on the management of stable coronary artery disease (SCAD) recommend the use of coronary computed tomography angiography (CTA) in the process of diagnosing coronary artery disease in patients with low intermediate pre-test probability for SCAD. Particularly in cases where stress electrocardiogram or stress imaging provides unclear results, a computed tomographic examination can be considered as a reliable alternative to invasive coronary angiography. Due to its high negative predictive value, coronary CTA can provide accurate information on the presence of coronary artery stenosis and thus coronary artery disease can be reliably excluded without the risks associated with invasive procedures...
October 2017: Deutsche Medizinische Wochenschrift
https://www.readbyqxmd.com/read/29044112/cognitive-task-information-is-transferred-between-brain-regions-via-resting-state-network-topology
#10
Takuya Ito, Kaustubh R Kulkarni, Douglas H Schultz, Ravi D Mill, Richard H Chen, Levi I Solomyak, Michael W Cole
Resting-state network connectivity has been associated with a variety of cognitive abilities, yet it remains unclear how these connectivity properties might contribute to the neurocognitive computations underlying these abilities. We developed a new approach-information transfer mapping-to test the hypothesis that resting-state functional network topology describes the computational mappings between brain regions that carry cognitive task information. Here, we report that the transfer of diverse, task-rule information in distributed brain regions can be predicted based on estimated activity flow through resting-state network connections...
October 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/29043850/age-adjusted-d-dimer-cut-off-in-the-diagnostic-strategy-for-deep-vein-thrombosis-a-systematic-review
#11
Mads Nybo, Anne-Mette Hvas
BACKGROUND: Studies have indicated that use of an age-adjusted D-dimer cut-off value for patients above 50 years increases utility of the diagnostic strategy for pulmonary embolism. Evidence for the same approach regarding diagnosis of deep vein thrombosis (DVT) is, however, unclear. MATERIALS AND METHODS: A systematic literature review was conducted following the PRISMA Statement guideline to gather the existing knowledge on the use of an age-adjusted D-dimer cut-off in the diagnostic strategy for DVT...
October 18, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/29042519/balanced-excitation-and-inhibition-are-required-for-high-capacity-noise-robust-neuronal-selectivity
#12
Ran Rubin, L F Abbott, Haim Sompolinsky
Neurons and networks in the cerebral cortex must operate reliably despite multiple sources of noise. To evaluate the impact of both input and output noise, we determine the robustness of single-neuron stimulus selective responses, as well as the robustness of attractor states of networks of neurons performing memory tasks. We find that robustness to output noise requires synaptic connections to be in a balanced regime in which excitation and inhibition are strong and largely cancel each other. We evaluate the conditions required for this regime to exist and determine the properties of networks operating within it...
October 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29042060/australian-general-practitioners-initiate-statin-therapy-primarily-on-the-basis-of-lipid-levels-new-zealand-general-practitioners-use-absolute-risk
#13
REVIEW
Chris Schilling, Josh Knight, Duncan Mortimer, Dennis Petrie, Philip Clarke, John Chalmers, Andrew Kerr, Rod Jackson
OBJECTIVES: To compare the determinants of initial statin prescribing between New Zealand and Australia. New Zealand has a system-wide absolute risk-based approach to primary care cardiovascular disease (CVD) management, while Australia has multiple guidelines. METHOD: Classification and Regression Tree (CART) analysis of two observational studies of primary care CVD management from New Zealand (PREDICT-CVD) and Australia (AusHeart). Over 80% of eligible New Zealanders have been screened for CVD risk...
October 10, 2017: Health Policy
https://www.readbyqxmd.com/read/29041917/locally-epistatic-models-for-genome-wide-prediction-and-association-by-importance-sampling
#14
Deniz Akdemir, Jean-Luc Jannink, Julio Isidro-Sánchez
BACKGROUND: In statistical genetics, an important task involves building predictive models of the genotype-phenotype relationship to attribute a proportion of the total phenotypic variance to the variation in genotypes. Many models have been proposed to incorporate additive genetic effects into prediction or association models. Currently, there is a scarcity of models that can adequately account for gene by gene or other forms of genetic interactions, and there is an increased interest in using marker annotations in genome-wide prediction and association analyses...
October 17, 2017: Genetics, Selection, Evolution: GSE
https://www.readbyqxmd.com/read/29041722/high-verdet-constants-and-diamagnetic-responses-of-ges2-in2s3-pbi2-chalcogenide-glasses-for-integrated-optics-applications
#15
Yantao Xu, Haitao Guo, Xusheng Xiao, Pengfei Wang, Xiaoxia Cui, Min Lu, Changgui Lin, Shixun Dai, Bo Peng
Chalcogenide glasses as kind of diamagnetic magneto-optical materials have promising applications in the field of integrated optics and optical communication systems due to their excellent properties, such as easy to be processed into waveguide and temperature independence of the Verdet constants. For clarifying the influence factors following the compositional variation on Faraday effect and finding a glass with a large Verdet constant, novel pseudo-ternary chalcogenide glass system, GeS2 - In2S3 - PbI2, was prepared and investigated...
August 21, 2017: Optics Express
https://www.readbyqxmd.com/read/29040494/beyond-reward-prediction-errors-human-striatum-updates-rule-values-during-learning
#16
Ian Ballard, Eric M Miller, Steven T Piantadosi, Noah D Goodman, Samuel M McClure
Humans naturally group the world into coherent categories defined by membership rules. Rules can be learned implicitly by building stimulus-response associations using reinforcement learning or by using explicit reasoning. We tested if the striatum, in which activation reliably scales with reward prediction error, would track prediction errors in a task that required explicit rule generation. Using functional magnetic resonance imaging during a categorization task, we show that striatal responses to feedback scale with a "surprise" signal derived from a Bayesian rule-learning model and are inconsistent with RL prediction error...
October 13, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/29039828/-clinical-laboratory-and-instrumental-criteria-for-myocarditis-established-in-comparison-with-myocardial-biopsy-a-non-invasive-diagnostic-algorithm
#17
O V Blagova, Yu V Osipova, A V Nedostup, E A Kogan, V A Sulimov
AIM: To determine the diagnostic value of different clinical, laboratory, and instrumental signs in the diagnosis of myocarditis in patients with the picture of idiopathic arrhythmias, dilated cardiomyopathy (DCM) and in a comparison group when comparing with myocardial morphological examination. SUBJECTS AND METHODS: A study group included 100 patients (35 women; mean age, 44.7±12.5 years) with idiopathic arrhythmias (n=20) and DCM as a syndrome (n=100). All underwent myocardial morphological examination: endomyocardial biopsy (EMB) (n=71), intraoperative biopsy (n=13), study of the explanted heart (n=6), and autopsy (n=11)...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/29036698/chromosomal-context-affects-the-molecular-evolution-of-sex-linked-genes-and-their-autosomal-counterparts-in-turtles-and-other-vertebrates
#18
Srihari Radhakrishnan, Nicole Valenzuela
Sex chromosomes evolve differently from autosomes because natural selection acts distinctly on them given their reduced recombination and smaller population size. Various studies of sex-linked genes compared to different autosomal genes within species support these predictions. Instead, here we take a novel alternative approach comparing the rate of evolution between subsets of genes that are sex-linked in selected reptiles/vertebrates and the same genes located in autosomes in other amniotes. We report for the first time the faster evolution of Z-linked genes in a turtle (the Chinese soft-shell turtle Pelodiscus sinensis) relative to autosomal orthologs in other taxa, including turtles with temperature-dependent sex determination (TSD)...
September 27, 2017: Journal of Heredity
https://www.readbyqxmd.com/read/29036659/derivation-of-occupational-thresholds-of-toxicological-concern-for-systemically-acting-noncarcinogenic-organic-chemicals
#19
Sandrine F Chebekoue, Kannan Krishnan
Many substances in workplace do not have occupational exposure limits. The threshold of toxicological concern (TTC) principle is part of the hierarchy of approaches useful in occupational health risk assessment. The aim of this study was to derive occupational TTCs (OTTCs) reflecting the airborne concentrations below which no significant risk to workers would be anticipated. A reference dataset consisting of the 8-h threshold limit values-Time-Weighted Average for 280 organic substances was compiled. Each substance was classified into low (class I), intermediate (class II), or high (class III) hazard categories as per Cramer rules...
August 2, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29036404/the-value-of-prior-knowledge-in-machine-learning-of-complex-network-systems
#20
Dana Ferranti, David Krane, David Craft
Motivation: Our overall goal is to develop machine-learning approaches based on genomics and other relevant accessible information for use in predicting how a patient will respond to a given proposed drug or treatment. Given the complexity of this problem, we begin by developing, testing and analyzing learning methods using data from simulated systems, which allows us access to a known ground truth. We examine the benefits of using prior system knowledge and investigate how learning accuracy depends on various system parameters as well as the amount of training data available...
July 7, 2017: Bioinformatics
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