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https://www.readbyqxmd.com/read/29352800/efficient-reactive-brownian-dynamics
#1
Aleksandar Donev, Chiao-Yu Yang, Changho Kim
We develop a Split Reactive Brownian Dynamics (SRBD) algorithm for particle simulations of reaction-diffusion systems based on the Doi or volume reactivity model, in which pairs of particles react with a specified Poisson rate if they are closer than a chosen reactive distance. In our Doi model, we ensure that the microscopic reaction rules for various association and dissociation reactions are consistent with detailed balance (time reversibility) at thermodynamic equilibrium. The SRBD algorithm uses Strang splitting in time to separate reaction and diffusion and solves both the diffusion-only and reaction-only subproblems exactly, even at high packing densities...
January 21, 2018: Journal of Chemical Physics
https://www.readbyqxmd.com/read/29352273/binder-free-sheet-type-all-solid-state-batteries-with-enhanced-rate-capabilities-and-high-energy-densities
#2
Mari Yamamoto, Yoshihiro Terauchi, Atsushi Sakuda, Masanari Takahashi
All-solid-state batteries using inorganic solid electrolytes are considered promising energy storage systems because of their safety and long life. Stackable and compact sheet-type all-solid-state batteries are urgently needed for industrial applications such as smart grids and electric vehicles. A binder is usually indispensable to the construction of sheet-type batteries; however, it can decrease the power and cycle performance of the battery. Here we report the first fabrication of a binder-free sheet-type battery...
January 19, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29351314/species-richness-of-eurasian-zephyrus-hairstreaks-lepidoptera-lycaenidae-theclini-with-implications-on-historical-biogeography-an-ndm-vndm-approach
#3
Hailing Zhuang, Masaya Yago, Josef Settele, Xiushan Li, Rei Ueshima, Nick V Grishin, Min Wang
AIM: A database based on distributional records of Eurasian Zephyrus hairstreaks (Lepidoptera: Lycaenidae: Theclini) was compiled to analyse their areas of endemism (AoEs), species richness and distribution patterns, to explore their locations of past glacial refugia and dispersal routes. METHODS: Over 2000 Zephyrus hairstreaks occurrences are analysed using the NDM/VNDM algorithm, for the recognition of AoEs. Species richness was calculated by using the option 'Number of different classes' to count the different classes of a variable presented in each 3...
2018: PloS One
https://www.readbyqxmd.com/read/29349464/boundary-induced-nucleation-control-a-theoretical-perspective
#4
Oleg Buller, Hong Wang, Wenchong Wang, Lifeng Chi, Andreas Heuer
The pre-patterning of a substrate to create energetically more attractive or repulsive regions allows one to generate a variety of structures in physical vapor deposition experiments. A particularly interesting structure is generated if the energetically attractive region forms a rectangular grid. For specific combinations of the particle flux, the substrate temperature and the lattice size it is possible to generate exactly one cluster per cell, giving rise to nucleation control. Here, we show that the experimental observations of nucleation control can be very well understood from a theoretical perspective...
January 19, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29347388/finite-volume-method-for-self-consistent-field-theory-of-polymers-material-conservation-and-application
#5
Daeseong Yong, Jaeup U Kim
For the purpose of checking material conservation of various numerical algorithms used in the self-consistent-field theory (SCFT) of polymeric systems, we develop an algebraic method using matrix and bra-ket notation, which traces the Hermiticity of the product of the volume and evolution matrices. Algebraic tests for material conservation reveal that the popular pseudospectral method in the Cartesian grid conserves material perfectly, while the finite-volume method (FVM) is the proper tool when real-space SCFT with the Crank-Nicolson method is adopted in orthogonal coordinate systems...
December 2017: Physical Review. E
https://www.readbyqxmd.com/read/29345384/a-single-molecule-propyne-trap-highly-efficient-removal-of-propyne-from-propylene-with-anion-pillared-ultramicroporous-materials
#6
Lifeng Yang, Xili Cui, Qiwei Yang, Siheng Qian, Hui Wu, Zongbi Bao, Zhiguo Zhang, Qilong Ren, Wei Zhou, Banglin Chen, Huabin Xing
Propyne/propylene (C3 H4 /C3 H6 ) separation is a critical process for the production of polymer-grade C3 H6 . However, optimization of the structure of porous materials for the highly efficient removal of C3 H4 from C3 H6 remains challenging due to their similar structures and ultralow C3 H4 concentration. Here, it is first reported that hybrid ultramicroporous materials with pillared inorganic anions (SiF62- = SIFSIX, NbOF52- = NbOFFIVE) can serve as highly selective C3 H4 traps for the removal of trace C3 H4 from C3 H6 ...
January 18, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29344017/global-registration-identifier-for-donors-grid-of-hematopoietic-stem-cells-road-to-automation-and-safety
#7
REVIEW
Joachim Klaus Neller, Paul Ashford, Caroline van Veen, Andreas Humpe
Once a cohort exceeds a certain size, it becomes mandatory to assign an identifier (ID) for each individual to ensure a secure, reliable, and unambiguous assignment. In the field of hematopoietic stem cell transplantation, with a still growing number of voluntary unrelated donors, it was recognized that a system needs to be developed to uniquely identify potential donors on a global scale to facilitate communication and to prevent errors in identification of donors. Efforts in this respect resulted in establishment of the GRID, with a defined structure and allocated rules...
November 2017: Transfusion Medicine and Hemotherapy
https://www.readbyqxmd.com/read/29339345/optimizing-critical-source-control-of-five-priority-regulatory-trace-elements-from-industrial-wastewater-in-china-implications-for-health-management
#8
Wenjun Wu, Jinnan Wang, Yang Yu, Hongqiang Jiang, Nianlei Liu, Jun Bi, Miaomiao Liu
Anthropogenic emissions of toxic trace elements (TEs) have caused worldwide concern due to their adverse effects on human health and ecosystems. Based on a stochastic simulation of factors' probability distribution, we established a bottom-up model to estimate the amounts of five priority-regulatory TEs released to aquatic environments from industrial processes in China. Total TE emissions in China in 2010 were estimated at approximately 2.27 t of Hg, 310.09 t of As, 318.17 t of Pb, 79.72 t of Cd, and 1040...
January 13, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29335607/grid-scale-drives-the-scale-and-long-term-stability-of-place-maps
#9
Caitlin S Mallory, Kiah Hardcastle, Jason S Bant, Lisa M Giocomo
Medial entorhinal cortex (MEC) grid cells fire at regular spatial intervals and project to the hippocampus, where place cells are active in spatially restricted locations. One feature of the grid population is the increase in grid spatial scale along the dorsal-ventral MEC axis. However, the difficulty in perturbing grid scale without impacting the properties of other functionally defined MEC cell types has obscured how grid scale influences hippocampal coding and spatial memory. Here we use a targeted viral approach to knock out HCN1 channels selectively in MEC, causing the grid scale to expand while leaving other MEC spatial and velocity signals intact...
January 15, 2018: Nature Neuroscience
https://www.readbyqxmd.com/read/29333481/theta-sequences-of-grid-cell-populations-can-provide-a-movement-direction-signal
#10
Ipshita Zutshi, Jill K Leutgeb, Stefan Leutgeb
It has been proposed that path integration in mammals is performed by the convergence of internally generated speed and directional inputs onto grid cells. Although this hypothesis has been supported by the discovery that head direction, speed, and grid cells are intermixed within entorhinal cortex and by the recent finding that head-direction inputs are necessary for grid firing, many details on how grid cells are generated have remained elusive. For example, analysis of recording data suggests that substituting head direction for movement direction accrues errors that preclude the formation of grid patterns...
October 2017: Current Opinion in Behavioral Sciences
https://www.readbyqxmd.com/read/29328166/comprehensive-three-dimensional-ray-tracing-model-for-three-mirror-cavity-enhanced-spectroscopy
#11
Faisal Nadeem, Berber R Postma, Geert Postma, Simona M Cristescu, Julien Mandon, Frans J M Harren
A 3D ray tracing model is used to simulate optical reinjection in a nonresonant optical cavity, for off-axis integrated cavity output spectroscopy. The optical cavities are optimized for maximum intensity enhancement factors via a grid search and a genetic algorithm. Intensity enhancement factors up to 1400 are found for short cavities (3 cm) and up to 101 for long cavities (50 cm). The model predicts that short absorption cells can be used, having a long effective path length and a high throughput power...
January 10, 2018: Applied Optics
https://www.readbyqxmd.com/read/29316623/neurodegeneration-and-sensorimotor-deficits-in-the-mouse-model-of-traumatic-brain-injury
#12
Saurav Bhowmick, Veera D'Mello, Nizmi Ponery, P M Abdul-Muneer
Traumatic brain injury (TBI) can result in persistent sensorimotor and cognitive deficits, which occur through a cascade of deleterious pathophysiological events over time. In this study, we investigated the hypothesis that neurodegeneration caused by TBI leads to impairments in sensorimotor function. TBI induces the activation of the caspase-3 enzyme, which triggers cell apoptosis in an in vivo model of fluid percussion injury (FPI). We analyzed caspase-3 mediated apoptosis by terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) staining and poly (ADP-ribose) polymerase (PARP) and annexin V western blotting...
January 6, 2018: Brain Sciences
https://www.readbyqxmd.com/read/29315706/a-basis-for-customising-perimetric-locations-within-the-macula-in-glaucoma
#13
Muhammed S Alluwimi, William H Swanson, Victor E Malinovsky, Brett J King
PURPOSE: It has been recognised that the 24-2 grid used for perimetry may poorly sample the macula, which has been recently identified as a critical region for diagnosing and managing patients with glaucoma. We compared data derived from patients and controls to investigate the efficacy of a basis for customising perimetric locations within the macula, guided by en face images of retinal nerve fibre layer (RNFL) bundles. METHODS: We used SD-OCT en face montages (www...
January 8, 2018: Ophthalmic & Physiological Optics: the Journal of the British College of Ophthalmic Opticians (Optometrists)
https://www.readbyqxmd.com/read/29311746/hexadirectional-coding-of-visual-space-in-human-entorhinal-cortex
#14
Matthias Nau, Tobias Navarro Schröder, Jacob L S Bellmund, Christian F Doeller
Entorhinal grid cells map the local environment, but their involvement beyond spatial navigation remains elusive. We examined human functional MRI responses during a highly controlled visual tracking task and show that entorhinal cortex exhibited a sixfold rotationally symmetric signal encoding gaze direction. Our results provide evidence for a grid-like entorhinal code for visual space and suggest a more general role of the entorhinal grid system in coding information along continuous dimensions.
January 8, 2018: Nature Neuroscience
https://www.readbyqxmd.com/read/29299679/modeling-and-improving-ethiopian-pasture-systems
#15
S G Parisi, G Cola, G Gilioli, L Mariani
The production of pasture in Ethiopia was simulated by means of a dynamic model. Most of the country is characterized by a tropical monsoon climate with mild temperatures and precipitation mainly concentrated in the June-September period (main rainy season). The production model is driven by solar radiation and takes into account limitations due to relocation, maintenance respiration, conversion to final dry matter, temperature, water stress, and nutrients availability. The model also considers the senescence of grassland which strongly limits the nutritional value of grasses for livestock...
January 3, 2018: International Journal of Biometeorology
https://www.readbyqxmd.com/read/29288036/a-study-of-mri-gradient-echo-signals-from-discrete-magnetic-particles-with-considerations-of-several-parameters-in-simulations
#16
Paul Kokeny, Yu-Chung N Cheng, He Xie
Modeling MRI signal behaviors in the presence of discrete magnetic particles is important, as magnetic particles appear in nanoparticle labeled cells, contrast agents, and other biological forms of iron. Currently, many models that take into account the discrete particle nature in a system have been used to predict magnitude signal decays in the form of R2* or R2' from one single voxel. Little work has been done for predicting phase signals. In addition, most calculations of phase signals rely on the assumption that a system containing discrete particles behaves as a continuous medium...
December 26, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29276476/critical-points-and-traveling-wave-in-locomotion-experimental-evidence-and-some-theoretical-considerations
#17
REVIEW
Philippe Saltiel, Andrea d'Avella, Matthew C Tresch, Kuno Wyler, Emilio Bizzi
The central pattern generator (CPG) architecture for rhythm generation remains partly elusive. We compare cat and frog locomotion results, where the component unrelated to pattern formation appears as a temporal grid, and traveling wave respectively. Frog spinal cord microstimulation with N-methyl-D-Aspartate (NMDA), a CPG activator, produced a limited set of force directions, sometimes tonic, but more often alternating between directions similar to the tonic forces. The tonic forces were topographically organized, and sites evoking rhythms with different force subsets were located close to the constituent tonic force regions...
2017: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/29251417/sted-tem-correlative-microscopy-leveraging-nanodiamonds-as-intracellular-dual-contrast-markers
#18
Neeraj Prabhakar, Markus Peurla, Sami Koho, Takahiro Deguchi, Tuomas Näreoja, Huan-Cheng Chang, Jessica M Rosenholm, Pekka E Hänninen
Development of fluorescent and electron dense markers is essential for the implementation of correlative light and electron microscopy, as dual-contrast landmarks are required to match the details in the multimodal images. Here, a novel method for correlative microscopy that utilizes fluorescent nanodiamonds (FNDs) as dual-contrast probes is reported. It is demonstrated how the FNDs can be used as dual-contrast labels-and together with automatic image registration tool SuperTomo, for precise image correlation-in high-resolution stimulated emission depletion (STED)/confocal and transmission electron microscopy (TEM) correlative microscopy experiments...
December 18, 2017: Small
https://www.readbyqxmd.com/read/29248331/evaluating-the-usefulness-of-mp-3-microperimetry-in-glaucoma-patients
#19
Masato Matsuura, Hiroshi Murata, Yuri Fujino, Kazunori Hirasawa, Mieko Yanagisawa, Ryo Asaoka
PURPOSE: The purpose of the current study was to evaluate the test-retest reproducibility and structure-function relationship of the MP-3 microperimeter, compared against the Humphrey Visual Analyzer (HFA). METHOD: ▪ DESIGN: Reliability and validity study SETTING: institutional, or clinical practice STUDY POPULATION: Thirty eyes of 30 primary open angle glaucoma patients (POAG) were enrolled. OBSERVATION PROCEDURES: VFs were measured twice with the MP-3 and HFA instruments, using the 10-2 test grid pattern in both perimeters...
December 14, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/29245295/lymphangiomatosis-involving-the-pulmonary-and-extrapulmonary-lymph-nodes-and-surrounding-soft-tissue-a-rare-case-report
#20
Xuhua Fang, Ziling Huang, Yu Zeng, Xuyou Zhu, Siqi Wang, Xiaoting Yu, Xian Li, Chunyan Wu, Xianghua Yi
BACKGROUND: Diffuse pulmonary lymphangiomatosis (DPL) mainly affects the lung and pleura. There are very few pathological reports of lung damage accompanied by diffuse involvement of the extrapulmonary lymph nodes and surrounding soft tissue. The clinicopathological significance of coexistence of pulmonary and extrapulmonary lesions is unknown. METHODS: Here, we report a 16-year-old male patient. The pathological specimens of the supraclavicular lymph node and soft tissue together with the lung biopsy were analyzed by pathological observation and immunohistochemical staining...
December 2017: Medicine (Baltimore)
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