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https://www.readbyqxmd.com/read/28646751/an-attentional-drift-diffusion-model-over-binary-attribute-choice
#1
Geoffrey Fisher
In order to make good decisions, individuals need to identify and properly integrate information about various attributes associated with a choice. Since choices are often complex and made rapidly, they are typically affected by contextual variables that are thought to influence how much attention is paid to different attributes. I propose a modification of the attentional drift-diffusion model, the binary-attribute attentional drift diffusion model (baDDM), which describes the choice process over simple binary-attribute choices and how it is affected by fluctuations in visual attention...
June 21, 2017: Cognition
https://www.readbyqxmd.com/read/28641772/susac-syndrome-a-differential-diagnosis-of-white-matter-lesions
#2
Mariano Marrodan, Jorge Correale, Lucas Alessandro, Mariela Amaya, Maria Eugenia Fracaro, Alejandro Alfredo Köhler, Marcela Fiol
INTRODUCTION: Susac Syndrome is an autoimmune endotheliopathy affecting capillaries and precapillary arterioles of the brain, inner ear and retina. The classic symptom triad includes visual disturbances, hypoacusia, and encephalopathy, but is rarely fully manifest at onset. The syndrome typically follows an active fluctuating monophasic course. Typical imaging findings on brain magnetic resonance show central fiber microischemias/microinfarctions of the corpus callosum known as "snow balls", as well as lineal infarcts and upper callosal fiber involvement...
July 2017: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/28639624/nearest-neighbour-resonating-valence-bonds-in-ybmggao4
#3
Yuesheng Li, Devashibhai Adroja, David Voneshen, Robert I Bewley, Qingming Zhang, Alexander A Tsirlin, Philipp Gegenwart
Since its proposal by Anderson, resonating valence bonds (RVB) formed by a superposition of fluctuating singlet pairs have been a paradigmatic concept in understanding quantum spin liquids. Here, we show that excitations related to singlet breaking on nearest-neighbour bonds describe the high-energy part of the excitation spectrum in YbMgGaO4, the effective spin-1/2 frustrated antiferromagnet on the triangular lattice, as originally considered by Anderson. By a thorough single-crystal inelastic neutron scattering study, we demonstrate that nearest-neighbour RVB excitations account for the bulk of the spectral weight above 0...
June 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/28634292/monte-carlo-sampling-for-stochastic-weight-functions
#4
Daan Frenkel, K Julian Schrenk, Stefano Martiniani
Conventional Monte Carlo simulations are stochastic in the sense that the acceptance of a trial move is decided by comparing a computed acceptance probability with a random number, uniformly distributed between 0 and 1. Here, we consider the case that the weight determining the acceptance probability itself is fluctuating. This situation is common in many numerical studies. We show that it is possible to construct a rigorous Monte Carlo algorithm that visits points in state space with a probability proportional to their average weight...
June 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28629860/hydrogen-deuterium-exchange-kinetics-in-%C3%AE-lactoglobulin-epicatechin-complexes-studied-by-ftir-spectroscopy
#5
Francesca Caporaletti, Marina Carbonaro, Paola Maselli, Alessandro Nucara
Hydrogen-Deuterium exchange kinetics of β-lactoglobulin and β-lactoglobulin (-)-epicatechin solutions has been investigated through the analysis of the amide I absorption band at 1650cm(-1) in the FTIR spectrum. H-D substitution in NH amides and residues of the protein results in a slight red-shift and in intensity changes of the amide I components: either these effects have been inspected in the framework of the Principal Components Analysis methods. The present analysis allowed to unveil three H-D kinetics at the timescale of the oligomeric fluctuations of the protein...
June 17, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28628636/weight-change-across-the-start-of-three-consecutive-pregnancies-and-the-risk-of-maternal-morbidity-and-sga-birth-at-the-second-and-third-pregnancy
#6
Jacqueline M Wallace, Sohinee Bhattacharya, Graham W Horgan
BACKGROUND: Weight-change across parities and/or current BMI may influence maternal and fetal morbidity and requires to be differentiated to better inform weight-management guidance. METHODS: Direction, pattern and magnitude of weight-change across three consecutive parities and thereby two inter-pregnancy periods was described in 5079 women. The association between inter-pregnancy weight-change versus current BMI and adverse maternal events, SGA-birth and preterm delivery at second and third pregnancy were investigated by logistic regression...
2017: PloS One
https://www.readbyqxmd.com/read/28618640/epidemic-extinction-paths-in-complex-networks
#7
Jason Hindes, Ira B Schwartz
We study the extinction of long-lived epidemics on finite complex networks induced by intrinsic noise. Applying analytical techniques to the stochastic susceptible-infected-susceptible model, we predict the distribution of large fluctuations, the most probable or optimal path through a network that leads to a disease-free state from an endemic state, and the average extinction time in general configurations. Our predictions agree with Monte Carlo simulations on several networks, including synthetic weighted and degree-distributed networks with degree correlations, and an empirical high school contact network...
May 2017: Physical Review. E
https://www.readbyqxmd.com/read/28598579/validation-of-protein-structure-models-using-network-similarity-score
#8
Sambit Ghosh, Vasundhara Gadiyaram, Saraswathi Vishveshwara
Accurate structural validation of proteins is of extreme importance in studies like protein structure prediction, analysis of molecular dynamic simulation trajectories and finding subtle changes in very similar structures. The benchmarks for today's structure validation are scoring methods like Global Distance Test-Total Structure (GDT-TS), TM-Score and Root Mean Square Deviations (RMSD). However, there is a lack of methods that look at both the protein backbone and side chain structures at the global connectivity level and provide information about the differences in connectivity...
June 9, 2017: Proteins
https://www.readbyqxmd.com/read/28587285/study-on-an-indoor-positioning-system-for-harsh-environments-based-on-wi-fi-and-bluetooth-low-energy
#9
Gabriel de Blasio, Alexis Quesada-Arencibia, Carmelo R García, Jezabel Miriam Molina-Gil, Cándido Caballero-Gil
This paper presents a study of positioning system that provides advanced information services based on Wi-Fi and Bluetooth Low Energy (BLE) technologies. It uses Wi-Fi for rough positioning and BLE for fine positioning. It is designed for use in public transportation system stations and terminals where the conditions are "hostile" or unfavourable due to signal noise produced by the continuous movement of passengers and buses, data collection conducted in the constant presence thereof, multipath fading, non-line of sight (NLOS) conditions, the fact that part of the wireless communication infrastructure has already been deployed and positioned in a way that may not be optimal for positioning purposes, variable humidity conditions, etc...
June 6, 2017: Sensors
https://www.readbyqxmd.com/read/28584970/morphometric-evaluation-of-facial-and-vestibulocochlear-nerves-using-magnetic-resonance-imaging-comparison-of-meni%C3%A3-re-s-disease-ears-with-normal-hearing-ears
#10
Annika Henneberger, Birgit Ertl-Wagner, Maximilian Reiser, Robert Gürkov, Wilhelm Flatz
Loss of neural structures (such as hair cells or neurones within the spiral ganglion) has been proposed to be involved in Menière's disease (MD) (Spoendlin et al. Acta oto-laryngologica Supplementum 499:1-21, 1; Merchant et al. Eur Arch Oto-Rhino-Laryngol Off J Eur Feder Oto-Rhino-Laryngol Soc (EUFOS) Affil German Soc Oto-Rhino-Laryngol Head Neck Surg 252(2):63-75, 2; Tsuji et al. Ann Otol Rhinol Laryngol Suppl 81:26-31, 3; Kariya, Otol Neurotol Off Publ Am Otol Soc Am Neurotol Soc Eur Acad Otol Neurotol 28(8):1063-1068, 4; Megerian Laryngoscope 115(9):1525-1535, 5) but this has yet to be confirmed...
June 5, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28583599/serum-concentration-dynamic-of-energy-homeostasis-hormones-leptin-insulin-thyroid-hormones-and-cortisol-throughout-canine-pregnancy-and-lactation
#11
L Cardinali, A Troisi, J P Verstegen, L Menchetti, A Elad Ngonput, C Boiti, S Canello, R Zelli, A Polisca
Pregnancy and lactation represent critical periods of canine reproductive life and different hormones are required to maintain homeostasis and the correct energy requirements. The aim of this study was to evaluate leptin, insulin, triiodotyronine (T3), thyroxin (T4) and cortisol serum concentrations to better describe the canine maternal energy metabolism. Twelve Bloodhound bitches that had at least one litter and were considered to be healthy submitted blood samples every 15 days starting from day 0 (ovulation) throughout pregnancy up to the end of lactation (day 120)...
July 15, 2017: Theriogenology
https://www.readbyqxmd.com/read/28553553/use-of-chlorothiazide-in-the-management-of-central-diabetes-insipidus-in-early-infancy
#12
Manish Raisingani, Resmy Palliyil Gopi, Bina Shah
Management of central diabetes insipidus in infancy is challenging. The various forms of desmopressin, oral, subcutaneous, and intranasal, have variability in the duration of action. Infants consume most of their calories as liquids which with desmopressin puts them at risk for hyponatremia and seizures. There are few cases reporting chlorothiazide as a temporizing measure for central diabetes insipidus in infancy. A male infant presented on day of life 30 with holoprosencephaly, cleft lip and palate, and poor weight gain to endocrine clinic...
2017: Case Reports in Pediatrics
https://www.readbyqxmd.com/read/28553208/childhood-trauma-and-functional-connectivity-between-amygdala-and-medial-prefrontal-cortex-a-dynamic-functional-connectivity-and-large-scale-network-perspective
#13
Josh M Cisler
Altered functional connectivity (FC) between the medial prefrontal cortex (mPFC) and amygdala is widely implicated as a neural mechanism explaining risk for psychopathology among those exposed to early life trauma. Nonetheless, contemporary neuroimaging research has shifted toward large-scale network models of brain function, and it is not clear how this common bi-nodal finding fits into larger-scale network models. Here, using dynamic functional connectivity (DFC) approaches combined with large-scale network analyses, the larger role of bi-nodal FC between mPFC and amygdala among a sample of adolescent girls is investigated...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/28539296/-establishment-of-a-rabbit-model-of-small-diameter-vascular-graft-replacement
#14
Jia-Qing Zhang, Kun-Tang Chen, Fu-Wei Zhang, Shao-Bin Li, Yuan-Zhou Wu, Jing Feng, Wu-Jun Wang, Yu-Sheng Yan
OBJECTIVE: To establish an rabbit model that mimics the hemodynamics of the bypass graft after coronary artery bypass surgery. METHODS: Sixteen New Zealand rabbits were randomly divided into two groups for abdominal aortic artery replacement using a 3-cm-long ePTFE graft with an inner diameter 4 mm through an incision at 1/3 from the middle to the lower part of the abdomen (group A) or in the lower abdomen (group B). The general conditions of the rabbits, operative time, number of collateral vessels that needed to be ligated, rate of massive intraoperative bleeding, fluctuation of vascular anastomosis after surgery, patency rate of the graft on day 7 after the operation were compared between the two groups...
May 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28505872/quantum-corrections-of-the-truncated-wigner-approximation-applied-to-an-exciton-transport-model
#15
Anton Ivanov, Heinz-Peter Breuer
We modify the path integral representation of exciton transport in open quantum systems such that an exact description of the quantum fluctuations around the classical evolution of the system is possible. As a consequence, the time evolution of the system observables is obtained by calculating the average of a stochastic difference equation which is weighted with a product of pseudoprobability density functions. From the exact equation of motion one can clearly identify the terms that are also present if we apply the truncated Wigner approximation...
April 2017: Physical Review. E
https://www.readbyqxmd.com/read/28501974/proteolytic-activities-in-cortex-of-apical-parts-of-vicia-faba-ssp-minor-seedling-roots-during-kinetin-induced-programmed-cell-death
#16
Andrzej Kaźmierczak, Magdalena Doniak, Anita Kunikowska
Programmed cell death (PCD) is a crucial process in plant development. In this paper, proteolytically related aspects of kinetin-induced PCD in cortex cells of Vicia faba ssp. minor seedlings were examined using morphological, fluorometric, spectrophotometric, and fluorescence microscopic analyses. Cell viability estimation after 46 μM kinetin treatment of seedling roots showed that the number of dying cortex cells increased with treatment duration, reaching maximum after 72 h. Weight of the apical root segments increased with time and was about 2...
May 13, 2017: Protoplasma
https://www.readbyqxmd.com/read/28492016/vaginal-rejuvenation-using-energy-based-devices
#17
REVIEW
Cheryl Karcher, Neil Sadick
Physiologic changes in a woman's life, such as childbirth, weight fluctuations, and hormonal changes due to aging and menopause, may alter the laxity of the vaginal canal, damage the pelvic floor, and devitalize the mucosal tone of the vaginal wall. These events often lead to the development of genitourinary conditions such as stress urinary incontinence; vaginal atrophy; dryness; and physiologic distress affecting a woman's quality of life, self-confidence, and sexuality. Various treatment modalities are currently available to manage these indications, varying from invasive vaginal surgery to more benign treatments like topical vaginal hormonal gels or hormone-replacement therapy...
September 2016: International Journal of Women's Dermatology
https://www.readbyqxmd.com/read/28486426/a-low-glycaemic-index-diet-incorporating-isomaltulose-is-associated-with-lower-glycaemic-response-and-variability-and-promotes-fat-oxidation-in-asians
#18
Christiani Jeyakumar Henry, Bhupinder Kaur, Rina Yu Chin Quek, Stefan Gerardus Camps
Low glycaemic index (GI) foods minimize large blood glucose fluctuations and have been advocated to enhance fat oxidation and may contribute to weight management. We determined whether the inclusion of isomaltulose compared to sucrose in a low/high GI meal sequence can modulate the glycaemic response and substrate oxidation in an Asian population. Twenty Chinese men (body mass index (BMI): 17-28 kg/m²) followed a 24 h low GI (isomaltulose, Palatinose(TM)) or high GI (sucrose) diet in a randomized double-blind, controlled cross-over design...
May 9, 2017: Nutrients
https://www.readbyqxmd.com/read/28479103/linking-graph-features-of-anatomical-architecture-to-regional-brain-activity-a-multi-modal-mri-study
#19
Tien-Wen Lee, Shao-Wei Xue
BACKGROUND: Previous empirical research has treated regional neural responses and network architecture separately. However, anecdotal reports have suggested a close relationship between the two. This study aims to investigate the influence of structural connectivity on regional spontaneous activities. METHODS: Datasets of structural magnetic resonance imaging (sMRI), resting state functional MRI (rs-fMRI) and diffusion weighted imaging (DWI) of 36 right-handed healthy subjects (average age 27...
May 4, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28474929/discontinuous-transition-from-direct-to-inverse-cascade-in-three-dimensional-turbulence
#20
Ganapati Sahoo, Alexandros Alexakis, Luca Biferale
Inviscid invariants of flow equations are crucial in determining the direction of the turbulent energy cascade. In this work we investigate a variant of the three-dimensional Navier-Stokes equations that shares exactly the same ideal invariants (energy and helicity) and the same symmetries (under rotations, reflections, and scale transforms) as the original equations. It is demonstrated that the examined system displays a change in the direction of the energy cascade when varying the value of a free parameter which controls the relative weights of the triadic interactions between different helical Fourier modes...
April 21, 2017: Physical Review Letters
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