keyword
MENU ▼
Read by QxMD icon Read
search

dynamic index

keyword
https://www.readbyqxmd.com/read/28549379/dynamically-tunable-plasmon-induced-transparency-in-on-chip-graphene-based-asymmetrical-nanocavity-coupled-waveguide-system
#1
Pingping Qiu, Weibin Qiu, Zhili Lin, Houbo Chen, Junbo Ren, Jia-Xian Wang, Qiang Kan, Jiao-Qing Pan
A graphene-based on-chip plasmonic nanostructure composed of a plasmonic bus waveguide side-coupled with a U-shaped and a rectangular nanocavities has been proposed and modeled by using the finite element method in this paper. The dynamic tunability of the plasmon-induced transparency (PIT) windows has been investigated. The results reveal that the PIT effects can be tuned via modifying the chemical potential of the nanocavities and plasmonic bus waveguide or by varying the geometrical parameters including the location and width of the rectangular nanocavity...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28547799/the-effects-of-intransitive-competition-on-coexistence
#2
Laure Gallien, Niklaus E Zimmermann, Jonathan M Levine, Peter B Adler
Coexistence theory has been developed with an almost exclusive focus on interactions between two species, often ignoring more complex and indirect interactions, such as intransitive loops, that can emerge in competition networks. In fact, intransitive competition has typically been studied in isolation from other pairwise stabilising processes, and thus little is known about how intransitivity interacts with more traditional drivers of species coexistence such as niche partitioning. To integrate intransitivity into traditional coexistence theory, we developed a metric of growth rate when rare, Δri¯, to identify and quantify the impact of intransitive competition against a backdrop of pairwise stabilising niche differences...
May 26, 2017: Ecology Letters
https://www.readbyqxmd.com/read/28547660/rib-geometry-explains-variation-in-dynamic-structural-response-potential-implications-for-frontal-impact-fracture-risk
#3
Michelle M Murach, Yun-Seok Kang, Samuel D Goldman, Michelle A Schafman, Stephen H Schlecht, Kevin Moorhouse, John H Bolte, Amanda M Agnew
The human thorax is commonly injured in motor vehicle crashes, and despite advancements in occupant safety rib fractures are highly prevalent. The objective of this study was to quantify the ability of gross and cross-sectional geometry, separately and in combination, to explain variation of human rib structural properties. One hundred and twenty-two whole mid-level ribs from 76 fresh post-mortem human subjects were tested in a dynamic frontal impact scenario. Structural properties (peak force and stiffness) were successfully predicted (p < 0...
May 25, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28547213/evolutionary-dynamics-in-the-two-locus-two-allele-model-with-weak-selection
#4
Martin Pontz, Josef Hofbauer, Reinhard Bürger
Two-locus two-allele models are among the most studied models in population genetics. The reason is that they are the simplest models to explore the role of epistasis for a variety of important evolutionary problems, including the maintenance of polymorphism and the evolution of genetic incompatibilities. Many specific types of models have been explored. However, due to the mathematical complexity arising from the fact that epistasis generates linkage disequilibrium, few general insights have emerged. Here, we study a simpler problem by assuming that linkage disequilibrium can be ignored...
May 25, 2017: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/28546316/satellites-reveal-contrasting-responses-of-regional-climate-to-the-widespread-greening-of-earth
#5
Giovanni Forzieri, Ramdane Alkama, Diego G Miralles, Alessandro Cescatti
Changes in vegetation cover associated to the observed greening may affect several biophysical processes, whose net effects on climate are unclear. Here, we analyze remotely sensed dynamics in leaf area index (LAI) and energy fluxes to explore the associated variation in local climate. We show that the increasing trend in LAI contributed to the warming of boreal zones through a reduction of surface albedo, and to an evaporation-driven cooling in arid regions. The interplay between LAI and surface biophysics is amplified up to five times under extreme warm-dry and cold-wet years...
May 25, 2017: Science
https://www.readbyqxmd.com/read/28545730/synthesis-and-characterisation-of-non-bonded-1-7%C3%AE-m-thin-shell-ts1-7-100nm-silica-particles-for-the-rapid-separation-and-analysis-of-uric-acid-and-creatinine-in-human-urine-by-hydrophilic-interaction-chromatography
#6
Victor K Langsi, Benjamin A Ashu-Arrah, Niamh Ward, Jeremy D Glennon
A rapid chromatographic method for the simultaneous determination of uric acid (UA) and creatinine (Cr) in human urine is described, using a non-bonded 1.7μm thin-shell (TS1.7-100nm) silica particle prepared by the seeded-growth approach. The new shell particle was characterised by scanning electron microscopy (SEM), transmission electron microscopy (TEM), dynamic light scattering (DLS) and BET analysis. TEM reveals 1.5μm solid core and 100nm shell thickness. DLS shows polydispersity index <0.2. Expanded pore size of 88Å and specific surface area of 78m(2)/g were determined by BET...
May 3, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28545123/predictability-of-arousal-in-mouse-slow-wave-sleep-by-accelerometer-data
#7
Gustavo Zampier Dos Santos Lima, Sergio Roberto Lopes, Thiago Lima Prado, Bruno Lobao-Soares, George C do Nascimento, John Fontenele-Araujo, Gilberto Corso
Arousals can be roughly characterized by punctual intrusions of wakefulness into sleep. In a standard perspective, using human electroencephalography (EEG) data, arousals are associated to slow-wave rhythms and K-complex brain activity. The physiological mechanisms that give rise to arousals during sleep are not yet fully understood. Moreover, subtle body movement patterns, which may characterize arousals both in human and in animals, are usually not detectable by eye perception and are not in general present in sleep studies...
2017: PloS One
https://www.readbyqxmd.com/read/28544892/facial-expression-movement-enhances-the-measurement-of-temporal-dynamics-of-attentional-bias-in-the-dot-probe-task
#8
Corrado Caudek, Francesco Ceccarini, Claudio Sica
The facial dot-probe task is one of the most common experimental paradigms used to assess attentional bias toward emotional information. In recent years, however, the psychometric properties of this paradigm have been questioned. In the present study, attentional bias to emotional face stimuli was measured with dynamic and static images of realistic human faces in 97 college students (63 women) who underwent either a positive or a negative mood-induction prior to the experiment. We controlled the bottom-up salience of the stimuli in order to dissociate the top-down orienting of attention from the effects of the bottom-up physical properties of the stimuli...
May 10, 2017: Behaviour Research and Therapy
https://www.readbyqxmd.com/read/28543885/dce-mri-prediction-of-survival-time-for-patients-with-glioblastoma-multiforme-using-an-adaptive-neuro-fuzzy-based-model-and-nested-model-selection-technique
#9
Azimeh N V Dehkordi, Alireza Kamali-Asl, Ning Wen, Tom Mikkelsen, Indrin J Chetty, Hassan Bagher-Ebadian
This pilot study investigates the construction of an Adaptive Neuro-Fuzzy Inference System (ANFIS) for the prediction of the survival time of patients with glioblastoma multiforme (GBM). ANFIS is trained by the pharmacokinetic (PK) parameters estimated by the model selection (MS) technique in dynamic contrast enhanced-magnetic resonance imaging (DCE-MRI) data analysis, and patient age. DCE-MRI investigations of 33 treatment-naïve patients with GBM were studied. Using the modified Tofts model and MS technique, the following physiologically nested models were constructed: Model 1, no vascular leakage (normal tissue); Model 2, leakage without efflux; Model 3, leakage with bidirectional exchange (influx and efflux)...
May 25, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28542622/meta-analysis-of-magnetic-resonance-imaging-accuracy-for-diagnosis-of-oral-cancer
#10
Marcelo Aldrighi Moreira, Luiza Silveira Lessa, Francieli Regina Bortoli, Abigail Lopes, Eduardo Picolo Xavier, Renan Antonio Ceretta, Fernanda Guglielmi Faustini Sônego, Cristiane Damiani Tomasi, Patricia Duarte Simões Pires, Luciane Bisognin Ceretta, Ingrid Dalira Schweigert Perry, Priscyla Waleska Simões
OBJECTIVE: To establish the diagnostic accuracy of magnetic resonance imaging (MRI) as an auxiliary means for the diagnosis of oral cancer through a systematic review and meta-analysis. METHODS: An exhaustive search of publications from 1986 to 2016 was performed of Medline, Embase and Cochrane (and related databases), including grey literature. Primary diagnostic accuracy studies that assessed oral cancer (target condition) using MRI (index test) were included...
2017: PloS One
https://www.readbyqxmd.com/read/28542334/flight-initiation-by-ferruginous-hawks-depends-on-disturbance-type-experience-and-the-anthropogenic-landscape
#11
Cameron J Nordell, Troy I Wellicome, Erin M Bayne
The expansion of humans and their related infrastructure is increasing the likelihood that wildlife will interact with humans. When disturbed by humans, animals often change their behaviour, which can result in time and energetic costs to that animal. An animal's decision to change behaviour is likely related to the type of disturbance, the individual's past experience with disturbance, and the landscape in which the disturbance occurs. In southern Alberta and Saskatchewan, we quantified probability of flight initiation from the nest by Ferruginous Hawks (Buteo regalis) during approaches to nests by investigators...
2017: PloS One
https://www.readbyqxmd.com/read/28542112/effects-of-vestibular-rehabilitation-on-gait-performance-in-poststroke-patients-a-pilot-randomized-controlled-trial
#12
Tsubasa Mitsutake, Maiko Sakamoto, Kozo Ueta, Shinichiro Oka, Etsuo Horikawa
The effects of vestibular rehabilitation on poststroke patients are unknown. This study aimed to investigate whether or not vestibular rehabilitation would improve both the vestibulo-ocular reflex and gait performance of patients with poststroke hemiparesis. Twenty-eight patients with stroke were assigned randomly to either an experimental group (N=14) or a control group (N=14). The experimental group performed the conventional physical therapy for 40 min and vestibular rehabilitation for 20 min, as a 60 min session, during the first 3 weeks and then completed only the conventional intervention for 60 min for the following 3 weeks...
May 24, 2017: International Journal of Rehabilitation Research. Revue Internationale de Recherches de Réadaptation
https://www.readbyqxmd.com/read/28541919/can-we-speculate-running-application-with-server-power-consumption-trace
#13
Yuanlong Li, Han Hu, Yonggang Wen, Jun Zhang
In this paper, we propose to detect the running applications in a server by classifying the observed power consumption series for the purpose of data center energy consumption monitoring and analysis. Time series classification problem has been extensively studied with various distance measurements developed; also recently the deep learning-based sequence models have been proved to be promising. In this paper, we propose a novel distance measurement and build a time series classification algorithm hybridizing nearest neighbor and long short term memory (LSTM) neural network...
May 24, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28541761/hydrophilically-modified-self-assembling-%C3%AE-tocopherol-derivative-as-niosomal-nanocarrier-for-improving-clarithromycin-oral-bioavailability
#14
Shafi Ullah, Muhammad Raza Shah, Mohammad Shoaib, Muhammad Imran, Syed Wadood Ali Shah, Farid Ahmed, Qamar Gul, Ismail Shah
Synthesis of biocompatible and cost-effective novel nonionic surfactants from renewable resources has been the subject of greater scientific interest for enhancing the bioavailability of less water-soluble drugs. The present study focuses on the synthesis of α-tocopherol-based novel biocompatible nonionic surfactant and its evaluation for forming clarithromycin-loaded niosomal drug delivery system. α-tocopherol was hydrophilically modified through multistep reactions and characterized using mass and (1)H NMR spectroscopic techniques...
May 25, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28541684/ultrawide-thermo-optic-tuning-of-pbte-meta-atoms
#15
Tomer Lewi, Hayden A Evans, Nikita A Butakov, Jon A Schuller
Subwavelength Mie resonators have enabled new classes of optical antenna and nanophotonic devices and can act as the basic meta-atoms constituents of low-loss dielectric metasurfaces. In any application, tunable Mie resonances are key to achieving dynamic and reconfigurable operation. However, active tuning of these nanoantennas is still limited and usually results in sub-linewidth resonance tuning. Here, we demonstrate ultra-wide dynamic tuning of PbTe Mie resonators fabricated via both laser ablation and a novel solution-processing approach...
May 25, 2017: Nano Letters
https://www.readbyqxmd.com/read/28538819/how-strong-is-the-relationship-between-rainfall-variability-and-caatinga-productivity-a-case-study-under-a-changing-climate
#16
Cleber Salimon, Liana Anderson
Despite the knowledge of the influence of rainfall on vegetation dynamics in semiarid tropical Brazil, few studies address and explore quantitatively the various aspects of this relationship. Moreover, Northeast Brazil is expected to have its rainfall reduced by as much as 60% until the end of the 21st Century, under scenario AII of the IPCC Report 2010. We sampled and analyzed satellite-derived monthly rainfall and a vegetation index data for 40 sites with natural vegetation cover in Paraíba State, Brazil from 2001 to 2012...
May 22, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/28536592/trait-associations-in-diversity-panels-of-the-two-common-bean-phaseolus-vulgaris-l-gene-pools-grown-under-well-watered-and-water-stress-conditions
#17
Asrat Asfaw, Daniel Ambachew, Trushar Shah, Matthew W Blair
Common beans are a warm-season, food legume cultivated in areas prone to water limitation throughout their growing season. This study assessed the magnitude and pattern of trait associations for a total of 202 common bean genotypes divided into panels of 81 Andean and 121 Mesoamerican gene pool accessions grown under contrasting treatments of well-watered, non-stress, and water-limited, terminal drought-stress conditions. Linear correlation, complex path coefficient, and genetic divergence analyses were used to dissect the relationship dynamics between traits and the relative contribution of adaptive traits to differentiation among gene pools and genotypes based on drought stress...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28534025/atrial-fibrillation-dynamics-and-ionic-block-effects-in-six-heterogeneous-human-3d-virtual-atria-with-distinct-repolarization-dynamics
#18
Carlos Sánchez, Alfonso Bueno-Orovio, Esther Pueyo, Blanca Rodríguez
Atrial fibrillation (AF) usually manifests as reentrant circuits propagating through the whole atria creating chaotic activation patterns. Little is yet known about how differences in electrophysiological and ionic properties between patients modulate reentrant patterns in AF. The goal of this study is to quantify how variability in action potential duration (APD) at different stages of repolarization determines AF dynamics and their modulation by ionic block using a set of virtual whole-atria human models...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/28533678/effect-of-thermal-pulsation-treatment-on-tear-film-parameters-in-dry-eye-disease-patients
#19
Michelle J Kim, Sandra S Stinnett, Preeya K Gupta
PURPOSE: The goal of this study was to evaluate the effect of thermal pulsation treatment on tear film parameters, specifically osmolarity and matrix metalloproteinase-9 (MMP-9), in patients with meibomian gland dysfunction (MGD) and dry eye disease (DED). METHODS: A single-center review of 189 eyes that underwent thermal pulsation treatment was performed. Data were collected on pre and posttreatment osmolarity, MMP-9, tear break-up time (TBUT), and ocular surface disease index (OSDI) score...
2017: Clinical Ophthalmology
https://www.readbyqxmd.com/read/28533406/spatiotemporal-dynamics-of-word-retrieval-in-speech-production-revealed-by-cortical-high-frequency-band-activity
#20
Stephanie K Riès, Rummit K Dhillon, Alex Clarke, David King-Stephens, Kenneth D Laxer, Peter B Weber, Rachel A Kuperman, Kurtis I Auguste, Peter Brunner, Gerwin Schalk, Jack J Lin, Josef Parvizi, Nathan E Crone, Nina F Dronkers, Robert T Knight
Word retrieval is core to language production and relies on complementary processes: the rapid activation of lexical and conceptual representations and word selection, which chooses the correct word among semantically related competitors. Lexical and conceptual activation is measured by semantic priming. In contrast, word selection is indexed by semantic interference and is hampered in semantically homogeneous (HOM) contexts. We examined the spatiotemporal dynamics of these complementary processes in a picture naming task with blocks of semantically heterogeneous (HET) or HOM stimuli...
May 22, 2017: Proceedings of the National Academy of Sciences of the United States of America
keyword
keyword
103147
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"