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https://www.readbyqxmd.com/read/28733654/direct-observation-of-topological-surface-state-arcs-in-photonic-metamaterials
#1
Biao Yang, Qinghua Guo, Ben Tremain, Lauren E Barr, Wenlong Gao, Hongchao Liu, Benjamin Béri, Yuanjiang Xiang, Dianyuan Fan, Alastair P Hibbins, Shuang Zhang
The discovery of topological phases has introduced new perspectives and platforms for various interesting physics originally investigated in quantum contexts and then, on an equal footing, in classic wave systems. As a characteristic feature, nontrivial Fermi arcs, connecting between topologically distinct Fermi surfaces, play vital roles in the classification of Dirac and Weyl semimetals, and have been observed in quantum materials very recently. However, in classical systems, no direct experimental observation of Fermi arcs in momentum space has been reported so far...
July 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28732433/the-effect-of-salt-space-on-clinical-findings-and-peak-expiratory-flow-in-children-with-mild-to-moderate-asthma-a-randomized-crossover-trial
#2
Saeideh Mazloomzadeh, Niousha Bakhshi, Akefeh Ahmadiafshar, Mehdi Gholami
The asthma treatment and control might be associated with significant burden on family and community' thus exploring other therapeutic plans could be desirable. The aim of this study was to investigate the effect of salt space on clinical findings and peak expiratory flow rate among children with asthma. In this randomized crossover trial, 34 patients aged 6-14 years old with mild to moderate asthma were selected and randomly divided into two groups. The first group went through a period of salt therapy by staying in the salt room for one hour, three times a week for 3 consecutive weeks and then was under observation for three weeks...
June 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/28731818/the-adron-rm-instrument-onboard-the-exomars-rover
#3
I G Mitrofanov, M L Litvak, S Y Nikiforov, I Jun, Y I Bobrovnitsky, D V Golovin, A S Grebennikov, F S Fedosov, A S Kozyrev, D I Lisov, A V Malakhov, M I Mokrousov, A B Sanin, V N Shvetsov, G N Timoshenko, T M Tomilina, V I Tret'yakov, A A Vostrukhin
This overview presents the physical principles, design, measurement capabilities, and summary of planned operations of the autonomous detector of radiation of neutrons onboard rover at Mars (ADRON-RM) on the surface of Mars. ADRON-RM is a Russian project selected for the joint European Space Agency-Roscosmos ExoMars 2020 landing mission. A compact passive neutron spectrometer, ADRON-RM, was designed to study the abundance and distribution of water and neutron absorption elements (such as Cl, Fe, and others) in the martian subsurface along the path of the ExoMars rover...
June 2017: Astrobiology
https://www.readbyqxmd.com/read/28731720/analytic-energy-gradients-for-variational-two-electron-reduced-density-matrix-driven-complete-active-space-self-consistent-field-theory
#4
Elvis Maradzike, Gergely Gidofalvi, Justin M Turney, Henry F Schaefer, A Eugene DePrince
Analytic energy gradients are presented for a variational two-electron reduced-density matrix (2-RDM)-driven complete active space self-consistent field (CASSCF) method. The active-space 2-RDM is determined using a semidefinite programing (SDP) algorithm built upon an augmented Lagrangian formalism. Expressions for analytic gradients are simplified by the fact that the Lagrangian is stationary with respect to variations in both the primal and dual solutions to the SDP problem. Orbital response contributions to the gradient are identical to those that arise in conventional CASSCF methods in which the electronic structure of the active space is described by a full configuration interaction (CI) wave function...
July 21, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28730247/intramuscular-human-dirofilaria-repens-infection-of-the-temporal-region-case-report-and-review-of-the-literature
#5
Mircea IonuŢ GheorghiŢă, Mircea Cătălin ForŢofoiu, Cristiana Iulia Dumitrescu, Daniela Dumitrescu, Adrian Camen, Claudiu Mărgăritescu
Dirofilariasis is a zoonotic worldwide-distributed disease, especially in regions with warm to temperate climate, where it recently recorded a significant increase of prevalence. A 61-year-old female, a dog owner, residing in the Southwest of Romania, near a swamp, developed a painless nodule in the left temporal region. The contrast-enhanced computed tomography (CT) scan revealed a temporal intramuscular cystic lesion. The surgical exploration confirmed the lesion as with intramuscular localization. The histopathology and biochemistry investigations established as a cause of the lesion an infestation with Dirofilaria repens species...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28728145/extracellular-dna-contributes-to-dental-biofilm-stability
#6
Sebastian Schlafer, Rikke L Meyer, Irene Dige, Viduthalai R Regina
Extracellular DNA (eDNA) is a major matrix component of many bacterial biofilms. While the presence of eDNA and its role in biofilm stability have been demonstrated for several laboratory biofilms of oral bacteria, there is no data available on the presence and function of eDNA in in vivo grown dental biofilms. This study aimed to determine whether eDNA was part of the matrix in biofilms grown in situ in the absence of sucrose and whether treatment with DNase dispersed biofilms grown for 2.5, 5, 7.5, 16.5, or 24 h...
July 21, 2017: Caries Research
https://www.readbyqxmd.com/read/28727934/phylogenomics-reveals-a-complex-evolutionary-history-of-lobed-leaf-white-oaks-in-western-north-america
#7
John D McVay, Duncan Hauser, Andrew L Hipp, Paul Manos
Quercus (oak) species hybridize in complex patterns that have yet to be fully explored with phylogenomic data. Analyses to date have recovered reasonable divergent patterns, suggesting that the impact of introgression may not always be obvious in inferred oak phylogenies. We explore this phenomenon using RADseq data for 136 samples representing 54 oak species by conducting phylogenetic analyses designed to distinguish signals of lineage diversification and hybridization, focusing on the lobed-leaf species Quercus gambelii, Q...
July 20, 2017: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/28727915/improving-accuracy-diversity-and-speed-with-prime-macrocycle-conformational-sampling
#8
Dan Sindhikara, Steven A Spronk, Tyler Day, Ken Borrelli, Daniel L Cheney, Shana L Posy
A novel method for exploring macrocycle conformational space, Prime Macrocycle Conformational Sampling (Prime-MCS), is introduced and evaluated in the context of other available algorithms (Molecular Dynamics, LowModeMD in MOE, and MacroModel Baseline Search). The algorithms were benchmarked on a dataset of 208 macrocycles which was curated for diversity from the Cambridge Structural Database, the Protein Databank, and the Biologically Interesting Molecule Reference Dictionary. The algorithms were evaluated in terms of accuracy (ability to reproduce the crystal structure), diversity (coverage of conformational space), and computational speed...
July 20, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28727508/collective-stories-of-exercise-making-sense-of-gym-experiences-with-disabled-peers
#9
Emma V Richardson, Brett Smith, Anthony Papathomas
Using a dialogical narrative approach, we explored how disabled people made sense of their gym experiences as part of a peer group. Interviews were conducted with 18 disabled people (10 men and 8 women, aged 23-60) who had experience exercising in the gym as part of a group. Data were rigorously analyzed using a dialogical narrative analysis. Within their peer group, participants crafted a collective story that they used to resist disablism in the gym. The dialogical components of the collective story functioned to (a) validate participants' experiences of oppression in the gym, (b) forge an unspoken understanding with peers, (c) craft a more affirmative identity, and (d) instill a sense of empowerment in participants so that they can tell their own story...
July 2017: Adapted Physical Activity Quarterly: APAQ
https://www.readbyqxmd.com/read/28727409/plasmonic-nano-oven-by-concatenation-of-multishell-photo-thermal-enhancement
#10
Lijun Meng, Renwen Yu, Min Qiu, F Javier Garcia de Abajo
Metallodielectric multishell nanoparticles are capable of hosting collective plasmon oscillations distributed among different metallic layers, which result in large near-field enhancement at specific regions of the structure, where light absorption is maximized. We exploit this capability of multishell nanoparticles, combined with thermal boundary resistances and spatial tailoring of the optical near fields, to design plasmonic nano-ovens capable of achieving high temperatures at the core region using moderate illumination intensities...
July 20, 2017: ACS Nano
https://www.readbyqxmd.com/read/28726158/free-boundary-models-for-mosquito-range-movement-driven-by-climate-warming
#11
Wendi Bao, Yihong Du, Zhigui Lin, Huaiping Zhu
As vectors, mosquitoes transmit numerous mosquito-borne diseases. Among the many factors affecting the distribution and density of mosquitoes, climate change and warming have been increasingly recognized as major ones. In this paper, we make use of three diffusive logistic models with free boundary in one space dimension to explore the impact of climate warming on the movement of mosquito range. First, a general model incorporating temperature change with location and time is introduced. In order to gain insights of the model, a simplified version of the model with the change of temperature depending only on location is analyzed theoretically, for which the dynamical behavior is completely determined and presented...
July 19, 2017: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/28725848/exploring-inpatients-experiences-of-healing-and-healing-spaces-a-mixed-methods-study
#12
Lorissa MacAllister, Dawn Bellanti, Bonnie R Sakallaris
In order to understand a patient's healing experience it is essential to understand the elements that they, the patient, believes contributed to their healing. Previous research has focused on symptom reducers or contributors through environment such as stress. A person's experience of healing happens over time not instantaneous. Therefore, in this study, the interviews with patients happened after forty-eight hours of hospitalization. This mixed methods study describes the experiences of seventeen inpatients from two healthcare systems using a phenomenological approach combined with evidence based design evaluation methods to document the setting...
December 2016: Journal of patient experience
https://www.readbyqxmd.com/read/28725530/smart-fluid-systems-the-advent-of-autonomous-liquid-robotics
#13
REVIEW
A Chiolerio, Marco B Quadrelli
Organic, inorganic or hybrid devices in the liquid state, kept in a fixed volume by surface tension or by a confining membrane that protects them from a harsh environment, could be used as biologically inspired autonomous robotic systems with unique capabilities. They could change shape according to a specific exogenous command or by means of a fully integrated adaptive system, and provide an innovative solution for many future applications, such as space exploration in extreme or otherwise challenging environments, post-disaster search and rescue in ground applications, compliant wearable devices, and even in the medical field for in vivo applications...
July 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28723959/a-novel-surveillance-approach-for-disaster-mental-health
#14
Oliver Gruebner, Sarah R Lowe, Martin Sykora, Ketan Shankardass, S V Subramanian, Sandro Galea
BACKGROUND: Disasters have substantial consequences for population mental health. Social media data present an opportunity for mental health surveillance after disasters to help identify areas of mental health needs. We aimed to 1) identify specific basic emotions from Twitter for the greater New York City area during Hurricane Sandy, which made landfall on October 29, 2012, and to 2) detect and map spatial temporal clusters representing excess risk of these emotions. METHODS: We applied an advanced sentiment analysis on 344,957 Twitter tweets in the study area over eleven days, from October 22 to November 1, 2012, to extract basic emotions, a space-time scan statistic (SaTScan) and a geographic information system (QGIS) to detect and map excess risk of these emotions...
2017: PloS One
https://www.readbyqxmd.com/read/28723958/can-single-molecule-localization-microscopy-be-used-to-map-closely-spaced-rgd-nanodomains
#15
Mahdie Mollazade, Thibault Tabarin, Philip R Nicovich, Alexander Soeriyadi, Daniel J Nieves, J Justin Gooding, Katharina Gaus
Cells sense and respond to nanoscale variations in the distribution of ligands to adhesion receptors. This makes single molecule localization microscopy (SMLM) an attractive tool to map the distribution of ligands on nanopatterned surfaces. We explore the use of SMLM spatial cluster analysis to detect nanodomains of the cell adhesion-stimulating tripeptide arginine-glycine-aspartic acid (RGD). These domains were formed by the phase separation of block copolymers with controllable spacing on the scale of tens of nanometers...
2017: PloS One
https://www.readbyqxmd.com/read/28723578/convolutional-neural-network-based-encoding-and-decoding-of-visual-object-recognition-in-space-and-time
#16
REVIEW
K Seeliger, M Fritsche, U Güçlü, S Schoenmakers, J-M Schoffelen, S E Bosch, M A J van Gerven
Representations learned by deep convolutional neural networks (CNNs) for object recognition are a widely investigated model of the processing hierarchy in the human visual system. Using functional magnetic resonance imaging, CNN representations of visual stimuli have previously been shown to correspond to processing stages in the ventral and dorsal streams of the visual system. Whether this correspondence between models and brain signals also holds for activity acquired at high temporal resolution has been explored less exhaustively...
July 16, 2017: NeuroImage
https://www.readbyqxmd.com/read/28720500/essential-slow-degrees-of-freedom-in-protein-surface-simulations-a-metadynamics-investigation
#17
Arushi Prakash, K G Sprenger, Jim Pfaendtner
Many proteins exhibit strong binding affinities to surfaces, with binding energies much greater than thermal fluctuations. When modelling these protein-surface systems with classical molecular dynamics (MD) simulations, the large forces that exist at the protein/surface interface generally confine the system to a single minimum. Exploring the full conformational space of the protein, especially finding other stable structures, becomes prohibitively expensive. Coupling MD simulations with metadynamics (enhanced sampling) has fast become a common method for sampling the adsorption of such proteins...
July 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28720271/it-s-a-question-of-endurance-patients-with-head-and-neck-cancer-experiences-of-18-f-fdg-pet-ct-in-a-fixation-mask
#18
Camilla Andersson, Marta Röing, Ylva Tiblom Ehrsson, Birgitta Johansson
PURPOSE: This study aimed to explore how patients with head and neck cancer experienced undergoing an (18)F-fluoro-deoxy-glucose positrons emissions tomography/computed tomography ((18)F-FDG PET/CT) examination in a fixation mask. METHOD: Interviews were conducted with nine patients with known or suspected head and neck cancer who were scheduled for the examination for the first time. The phenomenological method according to van Manen and his four lifeworld existentials; lived space, lived body, lived time, and lived relation was used to analyse the interviews...
August 2017: European Journal of Oncology Nursing: the Official Journal of European Oncology Nursing Society
https://www.readbyqxmd.com/read/28720189/enhancing-the-meaningfulness-of-work-for-astronauts-on-long-duration-space-exploration-missions
#19
Thomas W Britt, Anton Sytine, Ashley Brady, Russ Wilkes, Rebecca Pittman, Kristen Jennings, Kandice Goguen
INTRODUCTION: Numerous authors have identified the stressors likely to be encountered on long duration space exploration missions (e.g., to Mars), including the possibility of significant crises, separation from family, boredom/monotony, and interpersonal conflict. Although many authors have noted that meaningful work may be beneficial for astronauts on these missions, none have detailed the sources of meaningful work for astronauts and how these sources may differ between astronauts...
August 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28720182/ground-reaction-forces-during-reduced-gravity-running-in-parabolic-flight
#20
Peter Cavanagh, Andrea Rice, Molly Glauberman, Amanda Sudduth, Arien Cherones, Shane Davis, Michael Lewis, Andrea Hanson, Grier Wilt
BACKGROUND: Treadmills have been employed as both a form of exercise and a countermeasure to prevent changes in the musculoskeletal system on almost all NASA missions and many Russian missions since the early Space Shuttle flights. It is possible that treadmills may also be part of exercise programs on future Mars missions and that they may be a component of exercise facilities in lunar or Martian habitats. METHODS: In order to determine if the ambient gravity on these destinations will provide osteogenic effects while performing exercise on a treadmill, ground reactions forces (GRFs) were measured on eight subjects (six women and two men) running at 6 mph during parabolic flight in Martian and lunar gravity conditions...
August 1, 2017: Aerospace Medicine and Human Performance
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