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https://www.readbyqxmd.com/read/28548460/internally-generated-hippocampal-sequences-as-a-vantage-point-to-probe-future-oriented-cognition
#1
REVIEW
Giovanni Pezzulo, Caleb Kemere, Matthijs A A van der Meer
Information processing in the rodent hippocampus is fundamentally shaped by internally generated sequences (IGSs), expressed during two different network states: theta sequences, which repeat and reset at the ∼8 Hz theta rhythm associated with active behavior, and punctate sharp wave-ripple (SWR) sequences associated with wakeful rest or slow-wave sleep. A potpourri of diverse functional roles has been proposed for these IGSs, resulting in a fragmented conceptual landscape. Here, we advance a unitary view of IGSs, proposing that they reflect an inferential process that samples a policy from the animal's generative model, supported by hippocampus-specific priors...
May 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28546890/near-field-surface-plasmon-field-enhancement-induced-by-rippled-surfaces
#2
Mario D'Acunto, Francesco Fuso, Ruggero Micheletto, Makoto Naruse, Francesco Tantussi, Maria Allegrini
The occurrence of plasmon resonances on metallic nanometer-scale structures is an intrinsically nanoscale phenomenon, given that the two resonance conditions (i.e., negative dielectric permittivity and large free-space wavelength in comparison with system dimensions) are realized at the same time on the nanoscale. Resonances on surface metallic nanostructures are often experimentally found by probing the structures under investigation with radiation of various frequencies following a trial-and-error method...
2017: Beilstein Journal of Nanotechnology
https://www.readbyqxmd.com/read/28543653/ripples-what-to-expect-when-you-serve-on-a-bioethics-commission
#3
Thomas H Murray
Cloning was the issue that put the National Bioethics Advisory Commission on the map, but the first clue that NBAC would address cloning was a terse fax from the White House to each of us who served on the Commission. The fax noted that with the birth of the sheep named Dolly, mammalian cloning was now a reality, and it tasked NBAC with providing advice on the ethics of human cloning and how the nation should respond to it. We were given ninety days to report our findings. That's a very tight deadline for a report written by a committee, but we met it, and along the way, I learned important lessons...
May 2017: Hastings Center Report
https://www.readbyqxmd.com/read/28540862/electronic-and-optical-properties-of-strained-graphene-and-other-strained-2d-materials-a-review
#4
Gerardo G Naumis, Salvador Barraza-Lopez, Maurice Oliva-Leyva, Humberto Terrones
This review presents the state of the art of strain and ripple-induced effects on the electronic and optical properties of graphene. It starts by providing the crystallographic description of mechanical deformations, as well as the diffraction pattern for different kinds of representative deformations fields. Then, the focus turns to the unique elastic properties of graphene, and to how strain is produced. Thereafter, various theoretical approaches used to study the electronic properties of strained graphene are examined, discussing the advantages of each...
May 25, 2017: Reports on Progress in Physics
https://www.readbyqxmd.com/read/28537309/rehybridization-induced-charge-density-oscillations-in-the-long-range-corrugated-silicene
#5
Agata Podsiadły-Paszkowska, Mariusz Krawiec
Freestanding silicene is a one-atom-thick two-dimensional material composed of Si atoms arranged in a honeycomb lattice that is related to graphene. Its low-buckled atomic structure facilitates the functionalization of silicene. We report on an alternative method of functionalization which utilizes one-dimensional long-range periodic structural deformation of silicene, and leads to rehybridization-induced sublattice-polarized charge density oscillations. The charge density modulation follows the structural deformation of silicene, and features opposite phases in different sublattices...
May 24, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28534486/top-predators-constrain-mesopredator-distributions
#6
Thomas M Newsome, Aaron C Greenville, Duško Ćirović, Christopher R Dickman, Chris N Johnson, Miha Krofel, Mike Letnic, William J Ripple, Euan G Ritchie, Stoyan Stoyanov, Aaron J Wirsing
Top predators can suppress mesopredators by killing them, competing for resources and instilling fear, but it is unclear how suppression of mesopredators varies with the distribution and abundance of top predators at large spatial scales and among different ecological contexts. We suggest that suppression of mesopredators will be strongest where top predators occur at high densities over large areas. These conditions are more likely to occur in the core than on the margins of top predator ranges. We propose the Enemy Constraint Hypothesis, which predicts weakened top-down effects on mesopredators towards the edge of top predators' ranges...
May 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28533560/saving-the-world-s-terrestrial-megafauna
#7
William J Ripple, Guillaume Chapron, José Vicente López-Bao, Sarah M Durant, David W Macdonald, Peter A Lindsey, Elizabeth L Bennett, Robert L Beschta, Jeremy T Bruskotter, Ahimsa Campos-Arceiz, Richard T Corlett, Chris T Darimont, Amy J Dickman, Rodolfo Dirzo, Holly T Dublin, James A Estes, Kristoffer T Everatt, Mauro Galetti, Varun R Goswami, Matt W Hayward, Simon Hedges, Michael Hoffmann, Luke T B Hunter, Graham I H Kerley, Mike Letnic, Taal Levi, Fiona Maisels, John C Morrison, Michael Paul Nelson, Thomas M Newsome, Luke Painter, Robert M Pringle, Christopher J Sandom, John Terborgh, Adrian Treves, Blaire Van Valkenburgh, John A Vucetich, Aaron J Wirsing, Arian D Wallach, Christopher Wolf, Rosie Woodroffe, Hillary Young, Li Zhang
No abstract text is available yet for this article.
October 1, 2016: Bioscience
https://www.readbyqxmd.com/read/28532331/is-restlessness-best-understood-as-a-process-reflecting-on-four-boys-restlessness-during-music-therapy-in-kindergarten
#8
Anna Helle-Valle, Per-Einar Binder, Norman Anderssen, Brynjulf Stige
ADHD can be considered an internationally recognized framework for understanding children's restlessness. In this context, children's restlessness is understood as a symptom of neurodevelopmental disorder. However, there are other possible understandings of children's restlessness. In this article, we explore four boys' collaborative and creative process as it is described and understood by three adults. The process is framed by a community music therapy project in a Norwegian kindergarten, and we describe four interrelated phases of this process: Exploring musical vitality and cooperation, Consolidating positions, Performing together, and Discovering ripple effects...
June 2017: International Journal of Qualitative Studies on Health and Well-being
https://www.readbyqxmd.com/read/28528138/torque-ripple-reduction-of-brushless-dc-motor-based-on-adaptive-input-output-feedback-linearization
#9
M Shirvani Boroujeni, G R Arab Markadeh, J Soltani
Torque ripple reduction of Brushless DC Motors (BLDCs) is an interesting subject in variable speed AC drives. In this paper at first, a mathematical expression for torque ripple harmonics is obtained. Then for a non-ideal BLDC motor with known harmonic contents of back-EMF, calculation of desired reference current amplitudes, which are required to eliminate some selected harmonics of torque ripple, are reviewed. In order to inject the reference harmonic currents to the motor windings, an Adaptive Input-Output Feedback Linearization (AIOFBL) control is proposed, which generates the reference voltages for three phases voltage source inverter in stationary reference frame...
May 17, 2017: ISA Transactions
https://www.readbyqxmd.com/read/28526664/effect-of-a-counseling-session-bolstered-by-text-messaging-on-self-selected-health-behaviors-in-college-students-a-preliminary-randomized-controlled-trial
#10
Janice Sandrick, Doreen Tracy, Arn Eliasson, Ashley Roth, Jeffrey Bartel, Melanie Simko, Tracy Bowman, Karen Harouse-Bell, Mariam Kashani, Marina Vernalis
BACKGROUND: The college experience is often the first time when young adults live independently and make their own lifestyle choices. These choices affect dietary behaviors, exercise habits, techniques to deal with stress, and decisions on sleep time, all of which direct the trajectory of future health. There is a need for effective strategies that will encourage healthy lifestyle choices in young adults attending college. OBJECTIVE: This preliminary randomized controlled trial tested the effect of coaching and text messages (short message service, SMS) on self-selected health behaviors in the domains of diet, exercise, stress, and sleep...
May 17, 2017: JMIR MHealth and UHealth
https://www.readbyqxmd.com/read/28521270/prediction-of-seizure-outcome-improved-by-fast-ripples-detected-in-low-noise-intraoperative-corticogram
#11
Tommaso Fedele, Georgia Ramantani, Sergey Burnos, Peter Hilfiker, Gabriel Curio, Thomas Grunwald, Niklaus Krayenbühl, Johannes Sarnthein
OBJECTIVE: Fast ripples (FR, 250-500Hz) in the intraoperative corticogram have recently been proposed as specific predictors of surgical outcome in epilepsy patients. However, online FR detection is restricted by their low signal-to-noise ratio. Here we propose the integration of low-noise EEG with unsupervised FR detection. METHODS: Pre- and post-resection ECoG (N=9 patients) was simultaneously recorded by a commercial device (CD) and by a custom-made low-noise amplifier (LNA)...
March 31, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28520435/modulation-of-electron-phonon-coupling-in-one-dimensionally-nanorippled-graphene-on-a-macrofacet-of-6h-sic
#12
Koichiro Ienaga, Takushi Iimori, Koichiro Yaji, Toshio Miyamachi, Shuhei Nakashima, Yukio Takahashi, Kohei Fukuma, Shingo Hayashi, Takashi Kajiwara, Anton Visikovsliy, Kazuhiko Mase, Kan Nakatsuji, Satoru Tanaka, Fumio Komori
Local electron-phonon coupling of a one-dimensionally rippled graphene is studied on a SiC(0001) vicinal substrate. We have characterized local atomic and electronic structures of a periodically nano-rippled graphene (3.4 nm period) prepared on a macrofacet of the 6H-SiC crystal using scanning tunneling microscopy/spectroscopy (STM/STS) and angle-resolved photoelectron spectroscopy. The rippled graphene on the macrofacets distributes homogeneously over the 6H-SiC substrate in a mm scale, and thus replica bands are detected by the macroscopic angle-resolved photoelectron spectroscopy...
May 18, 2017: Nano Letters
https://www.readbyqxmd.com/read/28516895/effect-of-magnetic-field-on-electronic-transport-in-a-bilayer-graphene-nanomesh
#13
Yanping Liu, Xiang Liu, Yanjing Zhang, Qinglin Xia, Jun He
We report on the observation of an unexpected sudden increase of resistance in bilayer graphene nanomesh (GNM) in the temperature range 270 ∼ 300 K that is strongly dependent on the magnetic field strength. We conjecture that the sharp increase in resistance originates from ripple scattering as induced by substrate roughness. The observed result is evidence of extrinsic corrugation in bilayer GNM as an additional scattering source that contributes to significant resistance. The observed weak localization in the GNM indicates intervalley scattering induced by lattice defects acts as resonant scatterers attribute to the high D peak...
June 9, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28514913/action-learning-ripples-within-and-beyond-the-set
#14
Robert James Warwick, Adam Palmer, Janet McCray
Purpose This paper aims to explore the impact of action learning (AL) on an individual and an organisation, particularly the process by which each affected the other. The organisation is a UK National Health Service (NHS) Trust that includes two hospitals. Design/methodology/approach This is a single person case study involving a clinician, but the voice of an author can also be heard. It involves the experience of the individual as they experience AL as part of a leadership development programme leading to a postgraduate certificate...
May 2, 2017: Leadership in Health Services
https://www.readbyqxmd.com/read/28513130/anisotropic-friction-of-wrinkled-graphene-grown-by-chemical-vapor-deposition
#15
Fei Long, Poya Yasaei, Wentao Yao, Amin Salehi-Khojin, Reza Shahbazian-Yassar
Wrinkle structures are commonly seen on graphene grown by chemical vapor deposition (CVD) method due to the different thermal expansion coefficient between graphene and its substrate. Despite the intensive investigations focusing on the electrical properties, the nano-tribological properties of wrinkles and the influence of wrinkle structures on the wrinkle free graphene remain less understood. Here, we report the observation of anisotropic nanoscale frictional characteristics depending on the orientation of wrinkles in CVD-grown graphene...
May 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28506629/hippocampal-information-processing-across-sleep-wake-cycles
#16
REVIEW
Kenji Mizuseki, Hiroyuki Miyawaki
According to a two-stage memory consolidation model, during waking theta states, afferent activity from the neocortex to the hippocampus induces transient synaptic modification in the hippocampus, where the information is deposited as a labile form of memory trace. During subsequent sharp-wave ripples (SPW-Rs), the newly acquired hippocampal information is transferred to the neocortex and stored as a long-lasting memory trace. Consistent with this hypothesis, waking theta states and SPW-Rs distinctly control information flow in the hippocampal-entorhinal loop...
May 12, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/28504295/increased-permeability-of-oxygen-atoms-through-graphene-with-ripples
#17
Guangyu He, Tao Liang, Qi Wang, Mingsheng Xu, Yingchun Liu
Graphene is an ideal membrane for selective separation because of its unique properties and single-layer structure. Considerable efforts have been made to alter the permeability of graphene. In this study, we investigate the pathways for an oxygen atom to pass through graphene sheets. We also identify the effect of the ripple's curvature in graphene sheets on the energy barrier of permeation through density functional theory calculations. Results show that oxygen atoms can easily pass through the concave side of graphene ripples with a large curvature...
May 15, 2017: Soft Matter
https://www.readbyqxmd.com/read/28484390/spatiotemporal-mapping-techniques-show-clozapine-impairs-neurogenic-and-myogenic-patterns-of-activity-in-the-colon-of-the-rabbit-in-a-dose-dependent-manner
#18
Susanna Every-Palmer, Roger G Lentle, Gordon Reynolds, Corrin Hulls, Paul Chambers, Helen Dunn, Pete M Ellis
Background: Clozapine, an antipsychotic used in treatment-resistant schizophrenia, has adverse gastrointestinal effects with significant associated morbidity and mortality. However, its effects on defined patterns of colonic contractile activity have not been assessed. Method: We used novel radial and longitudinal spatiotemporal mapping techniques, combined with and monitoring of ambient lumen pressure, in ex vivo preparations of triply and of singly haustrated portions of rabbit colon. We identified the contractile patterns of mass peristalses, fast phasic, and ripple contractions and directly qualified the effects of clozapine, at concentrations of 10 μmol/L, 20 μmol/L, and 30 μmol/L, and of norclozapine, the main metabolite of clozapine, on contractile patterns...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28482275/contextualising-renal-patient-routines-everyday-space-time-contexts-health-service-access-and-wellbeing
#19
Julia McQuoid, Tanisha Jowsey, Girish Talaulikar
Stable routines are key to successful illness self-management for the growing number of people living with chronic illness around the world. Yet, the influence of chronically ill individuals' everyday contexts in supporting routines is poorly understood. This paper takes a space-time geographical approach to explore the everyday space-time contexts and routines of individuals with chronic kidney disease (CKD). We ask: what is the relationship between renal patients' space-time contexts and their ability to establish and maintain stable routines, and, what role does health service access play in this regard? We draw from a qualitative case study of 26 individuals with CKD in Australia...
June 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28481919/correction-optogenetically-blocking-sharp-wave-ripple-events-in-sleep-does-not-interfere-with-the-formation-of-stable-spatial-representation-in-the-ca1-area-of-the-hippocampus
#20
Krisztián A Kovács, Joseph O'Neill, Philipp Schoenenberger, Markku Penttonen, Damaris K Rangel Guerrero, Jozsef Csicsvari
[This corrects the article DOI: 10.1371/journal.pone.0164675.].
2017: PloS One
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