54,909 results match your criteria Boundary 2-an International Journal Of Literature And Culture[Journal]


Soft high-resolution neural interfacing probes: materials and design approaches.

Nano Lett 2019 Apr 19. Epub 2019 Apr 19.

Neural interfacing probes are located between the nervous system and the implanted electronic device in order to acquire information of the complex neuronal activity and to reconstruct impaired neural connectivity. Despite remarkable advancement in recent years, conventional neural interfacing is still unable to completely accomplish these goals, especially in long-term brain interfacing. The major limitation arises from physical and mechanical differences between neural interfacing probes and neural tissues that cause local immune responses and production of scar cells near the interface. Read More

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http://pubs.acs.org/doi/10.1021/acs.nanolett.8b04895
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http://dx.doi.org/10.1021/acs.nanolett.8b04895DOI Listing
April 2019
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Religious and spiritual struggles, religiousness, and alcohol problems among undergraduates.

J Prev Interv Community 2019 Apr 19:1-16. Epub 2019 Apr 19.

b Bowling Green State University , Bowling Green , OH , USA.

Theoretically, religion/spirituality may protect against alcohol problems or facilitate recovery. However, challenges can arise in religious/spiritual life that may contribute to or complicate alcohol problems. Emerging adults often experience difficult transitions from family environments to independent membership in academic communities straddling the legal drinking age boundary. Read More

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https://www.tandfonline.com/doi/full/10.1080/10852352.2019.1
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http://dx.doi.org/10.1080/10852352.2019.1603678DOI Listing
April 2019
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Boundary condition nomenclature confusion in groundwater flow modelling.

Ground Water 2019 Apr 18. Epub 2019 Apr 18.

National Centre for Groundwater Research and Training, Flinders University, GPO Box 2100, Adelaide, SA, 5001, Australia.

To solve the partial differential equations of groundwater flow, the information about head (h) and/or head gradient (∇h) must be specified along the boundaries of a model domain. The descriptors of different boundary condition (BC) types are drawn from founding mathematicians mainly of the 19 century (Cheng and Cheng 2005). Read More

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http://dx.doi.org/10.1111/gwat.12893DOI Listing

The Influence of Interfacial Chemistry on Magnesium Electrodeposition in Non-nucleophilic Electrolytes Using Sulfone-Ether Mixtures.

Front Chem 2019 3;7:194. Epub 2019 Apr 3.

Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN, United States.

One of the limiting factors in the development of magnesium batteries is the reversibility of magnesium electrodeposition and dissolution at the anode. Often irreversibility is related to impurities and decomposition. Herein we report on the cycling behavior of magnesium metal anodes in different electrolytes, Mg(HMDS) - 4 MgCl in tetrahydrofuran (THF) and a butyl sulfone/THF mixture. Read More

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http://dx.doi.org/10.3389/fchem.2019.00194DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6456701PMC

Design and Workspace Analysis of a Parallel Ankle Rehabilitation Robot (PARR).

J Healthc Eng 2019 14;2019:4164790. Epub 2019 Mar 14.

College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing, China.

The ankle rehabilitation robot is essential equipment for patients with foot drop and talipes valgus to make up deficiencies of the manual rehabilitation training and reduce the workload of rehabilitation physicians. A parallel ankle rehabilitation robot (PARR) was developed which had three rotational degrees of freedom around a virtual stationary center for the ankle joint. The center of the ankle should be coincided with the virtual stationary center during the rehabilitation process. Read More

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https://www.hindawi.com/journals/jhe/2019/4164790/
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http://dx.doi.org/10.1155/2019/4164790DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6437750PMC
March 2019
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Automatic Optic Disc Segmentation Based on Modified Local Image Fitting Model with Shape Prior Information.

J Healthc Eng 2019 14;2019:2745183. Epub 2019 Mar 14.

College of Information Science and Engineering, Northeastern University, Shenyang, Liaoning 110819, China.

Accurate optic disc (OD) detection is an essential yet vital step for retinal disease diagnosis. In the paper, an approach for segmenting OD boundary without manpower named full-automatic double boundary extraction is designed. There are two main advantages in it. Read More

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http://dx.doi.org/10.1155/2019/2745183DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6437741PMC

Tuning phonon transport spectrum for better thermoelectric materials.

Sci Technol Adv Mater 2019 21;20(1):10-25. Epub 2018 Dec 21.

Department of Mechanical Engineering, The University of Tokyo, Tokyo, Japan.

The figure of merit of thermoelectric materials can be increased by suppressing the lattice thermal conductivity without degrading electrical properties. Phonons are the carriers for lattice thermal conduction, and their transport can be impeded by nanostructuring, owing to the recent progress in nanotechnology. The key question for further improvement of thermoelectric materials is how to realize ultimate structure with minimum lattice thermal conductivity. Read More

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http://dx.doi.org/10.1080/14686996.2018.1548884DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6454406PMC
December 2018

Insights Into Traumatic Brain Injury From MRI of Harmonic Brain Motion.

J Exp Neurosci 2019 7;13:1179069519840444. Epub 2019 Apr 7.

Department of Mechanical Engineering & Materials Science, Washington University in St. Louis, St. Louis, MO, USA.

Measurements of dynamic deformation of the human brain, induced by external harmonic vibration of the skull, were analyzed to illuminate the mechanics of mild traumatic brain injury (TBI). Shear wave propagation velocity vector fields were obtained to illustrate the role of the skull and stiff internal membranes in transmitting motion to the brain. Relative motion between the cerebrum and cerebellum was quantified to assess the vulnerability of connecting structures. Read More

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http://dx.doi.org/10.1177/1179069519840444DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6454654PMC
April 2019
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Asymmetric dynamics of edge exchange spin waves in honeycomb nanoribbons with zigzag and bearded edge boundaries.

Authors:
D Ghader A Khater

Sci Rep 2019 Apr 18;9(1):6290. Epub 2019 Apr 18.

Department of Theoretical Physics, Institute of Physics, Jan Dlugosz University in Czestochowa, Am. Armii Krajowej 13/15, Czestochowa, Poland.

We report on the theoretical prediction of asymmetric edge spin waves, propagating in opposite directions at the boundaries of antiferromagnetic honeycomb nanoribbons with zigzag and bearded edges. The simultaneous propagation of edge spin waves along the same direction on both edges of the nanoribbons is forbidden. These asymmetric exchange spin waves at the edge boundaries are analogous to the nonreciprocal surface spin waves reported in magnetic thin films. Read More

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http://dx.doi.org/10.1038/s41598-019-42742-5DOI Listing

Superlubricity of glycerol by self-sustained chemical polishing.

Sci Rep 2019 Apr 18;9(1):6286. Epub 2019 Apr 18.

Université de Lyon, Ecole Centrale de Lyon, LTDS CNRS 5513, 69134, Ecully, France.

An impressive superlow coefficient of friction (CoF) as low as 0.004 (nearly equivalent to the rolling coefficient) was obtained by sliding a steel ball against a tetrahedral amorphous diamond-like carbon (ta-C) coating in glycerol under a boundary lubrication regime. X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) revealed substantial changes in the surface chemistry and topography in the friction track. Read More

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http://dx.doi.org/10.1038/s41598-019-42730-9DOI Listing

Computational modal analysis of a composite pelvic bone: convergence and validation studies.

Comput Methods Biomech Biomed Engin 2019 Apr 19:1-9. Epub 2019 Apr 19.

a Department of Technologies and Structures , Technical University of Liberec , Liberec , Czech Republic.

The purpose of the present study was to describe the structural density and geometry of the bone, as well as its sensitivity to the resolution of finite element discretisation. The study introduces a novel way to validate biomechanical model of the bone by experimental modal analysis. The structural density and geometry of the model was obtained from a composite bone. Read More

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https://www.tandfonline.com/doi/full/10.1080/10255842.2019.1
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http://dx.doi.org/10.1080/10255842.2019.1604949DOI Listing
April 2019
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Research on the Buckling Behavior of Functionally Graded Plates with Stiffeners Based on the Third-Order Shear Deformation Theory.

Materials (Basel) 2019 Apr 17;12(8). Epub 2019 Apr 17.

Faculty of Mechanical Engineering, Le Quy Don Technical University, Hanoi City 100000, Vietnam.

This paper presents a finite element formulation to study the mechanical buckling of stiffened functionally graded material (FGM) plates. The approach is based on a third-order shear deformation theory (TSDT) introduced by Guangyu Shi. The material properties of the plate were assumed to be varied in the thickness direction by a power law distribution, but the material of the stiffener was the same as that of the one of the bottom surface where the stiffener was placed. Read More

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https://www.mdpi.com/1996-1944/12/8/1262
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http://dx.doi.org/10.3390/ma12081262DOI Listing
April 2019
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High Accuracy Buoyancy for Underwater Gliders: The Uncertainty in the Depth Control.

Sensors (Basel) 2019 Apr 17;19(8). Epub 2019 Apr 17.

Science Department, Università degli Studi "Roma Tre", Via della Vasca Navale n. 84, 00146 Rome, Italy.

This paper is a section of several preliminary studies of the Underwater Drones Group of the Università degli Studi "Roma Tre" Science Department: We describe the study philosophy, the theoretical technological considerations for sizing and the development of a technological demonstrator of a high accuracy buoyancy and depth control. We develop the main requirements and the boundary conditions that design the buoyancy system and develop the mathematical conditions that define the main parameters. Read More

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http://dx.doi.org/10.3390/s19081831DOI Listing

Gellan Gum/Laponite Beads for the Modified Release of Drugs: Experimental and Modeling Study of Gastrointestinal Release.

Pharmaceutics 2019 Apr 17;11(4). Epub 2019 Apr 17.

Dipartimento di Chimica e Tecnologie del Farmaco, Sapienza Universitá di Roma, Piazzale Aldo Moro 5, 00185 Rome, Italy.

In this study, gellan gum (GG), a natural polysaccharide, was used to fabricate spherical porous beads suitable as sustained drug delivery systems for oral administration. GG was cross-linked with calcium ions to prepare polymeric beads. Rheological studies and preliminary experiments of beads preparation allowed to identify the GG and the CaCl concentrations suitable for obtaining stable and spherical particles. Read More

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https://www.mdpi.com/1999-4923/11/4/187
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http://dx.doi.org/10.3390/pharmaceutics11040187DOI Listing
April 2019
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Oblique-incidence, arbitrary-profile wave injection for electromagnetic simulations.

Authors:
F Pérez M Grech

Phys Rev E 2019 Mar;99(3-1):033307

Laboratoire pour l'Utilisation des Lasers Intenses, CNRS, École Polytechnique, CEA, Université Paris-Saclay, Sorbonne Université, F-91128, Palaiseau Cedex, France.

In an electromagnetic code, a wave can be injected in the simulation domain by prescribing an oscillating field profile at the domain boundary. The process is straightforward when the field profile has a known analytical expression (typically, paraxial Gaussian beams). However, if the field profile is known at some other plane, but not at the boundary (typically, nonparaxial beams), some preprocessing is needed to calculate the field profile after propagation back to the boundary. Read More

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https://link.aps.org/doi/10.1103/PhysRevE.99.033307
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http://dx.doi.org/10.1103/PhysRevE.99.033307DOI Listing
March 2019
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Comparison of the lattice-Boltzmann model with the finite-difference time-domain method for electrodynamics.

Authors:
A Hauser J L Verhey

Phys Rev E 2019 Mar;99(3-1):033301

Department of Experimental Audiology, Otto von Guericke University Magdeburg, Leipziger Straße 44, 39120 Magdeburg, Germany.

A three-dimensional lattice-Boltzmann model (LBM) for the simulation of the Maxwell equations is presented. The inclusion of media follows an extension of a special limit described in the literature which is applicable to this LBM and does not harm the stability of simulations. The focus of the present study lies on the properties of numerical accuracy and stability of the LBM in comparison to the standard finite-difference time-domain (FDTD) method based on Yee's method. Read More

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https://link.aps.org/doi/10.1103/PhysRevE.99.033301
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http://dx.doi.org/10.1103/PhysRevE.99.033301DOI Listing
March 2019
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First passage in an interval for fractional Brownian motion.

Authors:
Kay Jörg Wiese

Phys Rev E 2019 Mar;99(3-1):032106

Laboratoire de Physique de l'Ecole normale supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université Paris-Diderot, Sorbonne Paris Cité, Paris, France.

Let X_{t} be a random process starting at x∈[0,1] with absorbing boundary conditions at both ends of the interval. Denote by P_{1}(x) the probability to first exit at the upper boundary. For Brownian motion, P_{1}(x)=x, which is equivalent to P_{1}^{'}(x)=1. Read More

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http://dx.doi.org/10.1103/PhysRevE.99.032106DOI Listing

Griffiths-McCoy singularities in the dilute transverse-field Ising model: A numerical linked cluster expansion study.

Phys Rev E 2019 Mar;99(3-1):032129

Department of Physics, University of California Davis, California 95616, USA.

We use numerical linked cluster expansions (NLCEs) to study the site-diluted transverse-field Ising model on the square lattice at T=0. NLCE with a self-consistent mean field on the boundary of the clusters is used to obtain the ground-state magnetization, susceptibility, and structure factor as a function of transverse field h and exchange constant J. Adding site dilution to the model turns NLCE into a series expansion in the dilution parameter p. Read More

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https://link.aps.org/doi/10.1103/PhysRevE.99.032129
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http://dx.doi.org/10.1103/PhysRevE.99.032129DOI Listing
March 2019
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Evolution of instabilities in filament buckling processes.

Phys Rev E 2019 Mar;99(3-1):033004

Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina.

In this work we study the dynamical buckling process of a thin filament immersed in a highly viscous medium. We perform an experimental study to track the shape evolution of the filament during a constant velocity compression. Numerical simulations reproduce the dynamical features observed from the experimental data and allow quantifying the filament's load. Read More

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http://dx.doi.org/10.1103/PhysRevE.99.033004DOI Listing

Low-frequency dielectric response of a periodic array of charged spheres in an electrolyte solution: The simple cubic lattice.

Phys Rev E 2019 Mar;99(3-1):032604

Schlumberger-Doll Research, 1 Hampshire Street, Cambridge, Massachusetts 02139, USA.

We study the low-frequency dielectric response of highly charged spheres arranged in a cubic lattice and immersed in an electrolyte solution. We focus on the influence of the out-of-phase current in the regime where the ionic charge is neutral. We consider the case where the charged spheres have no surface conductance and no frequency-dependent surface capacitance. Read More

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https://link.aps.org/doi/10.1103/PhysRevE.99.032604
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http://dx.doi.org/10.1103/PhysRevE.99.032604DOI Listing
March 2019
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Diffusion of size bidisperse spheres in dense granular shear flow.

Phys Rev E 2019 Mar;99(3-1):032902

Institute of Process Equipment, Zhejiang University, Hangzhou 310027, China.

Diffusion is an important particle behavior in granular flow. Although granular diffusion has been studied for decades, the diffusion of size bidisperse particles has not been well understood. In this paper, discrete element method simulations with the Lees-Edwards boundary condition are performed to quantify the relation between the diffusion coefficient (D) and flow parameters for size bidisperse spheres in dense granular flow. Read More

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http://dx.doi.org/10.1103/PhysRevE.99.032902DOI Listing

Turbulent convection and large scale circulation in a cube with rough horizontal surfaces.

Phys Rev E 2019 Mar;99(3-1):033116

Departments of Physics and Mechanical and Aerospace Engineering, and the Courant Institute of Mathematical Sciences, New York University, New York, New York 10012 USA.

Large-eddy simulations of thermal convection are presented and discussed for a cube with rough horizontal surfaces. Two types of roughness are considered: uniformly placed pyramids, and grooves aligned parallel to one set of sidewalls. The Rayleigh number is 10^{8}, the Prandtl number 0. Read More

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http://dx.doi.org/10.1103/PhysRevE.99.033116DOI Listing

Cochlear mechanics with fluid viscosity and compressibility.

Authors:
P Deepu

Phys Rev E 2019 Mar;99(3-1):032417

Department of Mechanical Engineering, Indian Institute of Technology Patna, Bihta 801103, Bihar, India.

We extend the one-dimensional cochlear model to include the effect of viscosity and compressibility of the cochlear fluid. The resulting boundary-value problem is solved exactly using numerical techniques and semianalytically using the WKB approximation. Our results indicate the general trend of basilar membrane response increasing with an increase in compressibility or a decrease in viscosity. Read More

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http://dx.doi.org/10.1103/PhysRevE.99.032417DOI Listing

Understanding the temporal pattern of spreading in heterogeneous networks: Theory of the mean infection time.

Phys Rev E 2019 Mar;99(3-1):032309

Department of Physics, Inha University, Incheon 22212, Korea.

For a reliable prediction of an epidemic or information spreading pattern in complex systems, well-defined measures are essential. In the susceptible-infected model on heterogeneous networks, the cluster of infected nodes in the intermediate-time regime exhibits too large fluctuation in size to use its mean size as a representative value. The cluster size follows quite a broad distribution, which is shown to be derived from the variation of the cluster size with the time when a hub node was first infected. Read More

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http://dx.doi.org/10.1103/PhysRevE.99.032309DOI Listing

Characteristic times in the standard map.

Phys Rev E 2019 Mar;99(3-1):032203

Research Center for Astronomy, Academy of Athens Soranou Efesiou 4, GR-115 27 Athens, Greece.

We study and compare three characteristic times of the standard map: the Lyapunov time t_{L}, the Poincaré recurrence time t_{r}, and the stickiness (or escape) time t_{st}. The Lyapunov time is the inverse of the Lyapunov characteristic number (L) and in general is quite small. We find empirical relations for the L as a function of the nonlinearity parameter K and of the chaotic area A. Read More

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http://dx.doi.org/10.1103/PhysRevE.99.032203DOI Listing

Lattice Boltzmann models based on the vielbein formalism for the simulation of flows in curvilinear geometries.

Phys Rev E 2019 Mar;99(3-1):033304

Department of Physics, West University of Timişoara, Vasile Pârvan Avenue 4, 300223 Timişoara, Romania.

In this paper, we consider the Boltzmann equation with respect to orthonormal vielbein fields in conservative form. This formalism allows the use of arbitrary coordinate systems to describe the space geometry, as well as of an adapted coordinate system in the momentum space, which is linked to the physical space through the use of vielbeins. Taking advantage of the conservative form, we derive the macroscopic equations in a covariant tensor notation, and show that the hydrodynamic limit can be obtained via the Chapman-Enskog expansion in the Bhatnaghar-Gross-Krook approximation for the collision term. Read More

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http://dx.doi.org/10.1103/PhysRevE.99.033304DOI Listing

Spectral collocation method for collisional power absorption in radially inhomogeneous helicon plasmas.

Authors:
Suwon Cho

Phys Rev E 2019 Mar;99(3-1):033303

Department of Physics, Kyonggi University, Suwon, Kyonggi-Do 16227, Republic of Korea.

A spectral collocation method using Chebyshev polynomials is applied to compute the electromagnetic fields and the collisional power absorption in radially inhomogeneous helicon plasmas. The governing equation has a singularity at the cylindrical axis, which has been resolved by imposing the appropriate boundary conditions. The results are compared with those of the finite difference method. Read More

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http://dx.doi.org/10.1103/PhysRevE.99.033303DOI Listing

Topological quantization of energy transport in micro- and nano-mechanical lattices.

Phys Rev B 2018 ;97

Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.

Topological effects typically discussed in the context of quantum physics are emerging as one of the central paradigms of physics. Here, we demonstrate the role of topology in energy transport through dimerized micro- and nano-mechanical lattices in the classical regime, i.e. Read More

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http://dx.doi.org/10.1103/PhysRevB.97.125425DOI Listing
January 2018

Industrial Gear Oils: Tribological Performance and Subsurface Changes.

Tribol Lett 2018 10;66(2):65. Epub 2018 Apr 10.

2School of Materials, The University of Manchester, Manchester, M13 9PL UK.

This study examined the tribological performance of three gear oils (Oils A, B and C), in relation to surface and microstructural changes. Oil A contains molybdenum dithiophosphate friction modifier, Oil B contains amine molybdate combined with zinc dialkyl dithiophosphate antiwear additive, while Oil C contains phosphonate and a commercial gear oil package. Following sliding tests of a hardened AISI 52100 steel ball on a spheroidized AISI 52100 steel disc, the worn surfaces were chemically studied using Raman and energy-dispersive X-ray spectroscopy. Read More

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http://link.springer.com/10.1007/s11249-018-1013-2
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http://dx.doi.org/10.1007/s11249-018-1013-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6438653PMC
April 2018
1 Read

What a Difference a Stochastic Process Makes: Epidemiological-Based Real Options Models of Optimal Treatment of Disease.

Environ Resour Econ (Dordr) 2018 21;70(3):691-711. Epub 2017 Jun 21.

1Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA UK.

The real options approach has been used within environmental economics to investigate the impact of uncertainty on the optimal timing of control measures to minimise the impacts of invasive species, including pests and diseases. Previous studies typically model the growth in infected area using geometric Brownian motion (GBM). The advantage of this simple approach is that it allows for closed form solutions. Read More

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http://dx.doi.org/10.1007/s10640-017-0168-xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6435106PMC

Assessment of spatial patterns in benthic macrofauna of the U.S. west coast continental shelf.

J Biogeogr 2018 ;45(12):2701-2717

Western Ecology Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Newport OR 97365, USA.

Aim: We assessed whether currently described marine biogeographic boundaries apply to shelf macrofauna and which environmental drivers were most associated with species differences among regions.

Location: Pacific coast of North America from the Strait of Juan de Fuca in Washington to the California-Mexico border.

Methods: Van Veen grab samples were collected from soft sediment 28-138 m deep and sieved using 1 mm mesh. Read More

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http://dx.doi.org/10.1111/jbi.13451DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6463525PMC
January 2018

Streamwise-travelling viscous waves in channel flows.

J Eng Math 2018 23;111(1):23-49. Epub 2018 Feb 23.

2School of Engineering, Fraser Noble Building, King's College, University of Aberdeen, Aberdeen, AB24 3UE UK.

The unsteady viscous flow induced by streamwise-travelling waves of spanwise wall velocity in an incompressible laminar channel flow is investigated. Wall waves belonging to this category have found important practical applications, such as microfluidic flow manipulation via electro-osmosis and surface acoustic forcing and reduction of wall friction in turbulent wall-bounded flows. An analytical solution composed of the classical streamwise Poiseuille flow and a spanwise velocity profile described by the parabolic cylinder function is found. Read More

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http://dx.doi.org/10.1007/s10665-018-9953-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6434986PMC
February 2018

Wind-Tunnel Simulation of Weakly and Moderately Stable Atmospheric Boundary Layers.

Boundary Layer Meteorol 2018 21;168(1):29-57. Epub 2018 Feb 21.

EnFlo Laboratory, Department of Mechanical Engineering Sciences, University of Surrey, Guildford, Surrey GU2 7XH UK.

The simulation of horizontally homogeneous boundary layers that have characteristics of weakly and moderately stable atmospheric flow is investigated, where the well-established wind engineering practice of using 'flow generators' to provide a deep boundary layer is employed. Primary attention is given to the flow above the surface layer, in the absence of an overlying inversion, as assessed from first- and second-order moments of velocity and temperature. A uniform inlet temperature profile ahead of a deep layer, allowing initially neutral flow, results in the upper part of the boundary layer remaining neutral. Read More

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http://dx.doi.org/10.1007/s10546-018-0337-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6438612PMC
February 2018

The Impact of Three-Dimensional Effects on the Simulation of Turbulence Kinetic Energy in a Major Alpine Valley.

Boundary Layer Meteorol 2018 23;168(1):1-27. Epub 2018 Feb 23.

3Meteorology and Air Quality Section, Wageningen University, Wageningen, The Netherlands.

The correct simulation of the atmospheric boundary layer (ABL) is crucial for reliable weather forecasts in truly complex terrain. However, common assumptions for model parametrizations are only valid for horizontally homogeneous and flat terrain. Here, we evaluate the turbulence parametrization of the numerical weather prediction model COSMO with a horizontal grid spacing of for the Inn Valley, Austria. Read More

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http://dx.doi.org/10.1007/s10546-018-0341-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6438614PMC
February 2018

Automated Fine Motor Evaluation for Developmental Coordination Disorder.

IEEE Trans Neural Syst Rehabil Eng 2019 Apr 16. Epub 2019 Apr 16.

Developmental Coordination Disorder (DCD) is a type of motor learning difficulty that affects five to six percent of school-aged children, which may have a negative impact on the life of the sufferers. Timely and objective diagnosis of DCD is important for the success of the intervention. The present evaluation methods of DCD rely heavily on observational analysis of occupational therapists and physiotherapists who score the performance when children conduct some designed tasks. Read More

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http://dx.doi.org/10.1109/TNSRE.2019.2911303DOI Listing

NARROW GAP DETECTION IN MICROSCOPE IMAGES USING MARKED POINT PROCESS MODELING.

IEEE Trans Image Process 2019 Apr 16. Epub 2019 Apr 16.

Differentiating objects separated by narrow gaps is a challenging and important task in analyzing microscopic images. These small separations provide useful information for applications that require detailed boundary information and/or an accurate particle count. We present a new approach to the modeling of these gaps based on a marked point process(MPP) framework. Read More

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https://ieeexplore.ieee.org/document/8692712/
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http://dx.doi.org/10.1109/TIP.2019.2910389DOI Listing
April 2019
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Microplastic-Contaminant Interactions: Influence of Non-Linearity and Coupled Mass Transfer.

Environ Toxicol Chem 2019 Apr 18. Epub 2019 Apr 18.

Center for Applied Geoscience, Eberhard Karls Universität Tübingen, Hölderlinstraße 12, Tübingen, Germany.

Microplastic particles are ubiquitously detected in the environment. Despite intensive public and scientific discussions, their potential of transporting contaminants in rivers and oceans under environmental conditions is still under assessment. In this study, we measured sorption isotherms and kinetics in batch experiments using phenanthrene as typical hydrophobic wastewater contaminant and microplastic particles, differing in size and material. Read More

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https://onlinelibrary.wiley.com/doi/abs/10.1002/etc.4447
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http://dx.doi.org/10.1002/etc.4447DOI Listing
April 2019
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Air pollution survey across the western Mediterranean Sea: overview on oxygenated volatile hydrocarbons (OVOCs) and other gaseous pollutants.

Environ Sci Pollut Res Int 2019 Apr 17. Epub 2019 Apr 17.

National Research Council of Italy, Institute of Atmospheric Pollution Research (CNR.IIA), Monterotondo, RM, Italy.

Despite the Mediterranean Sea basin is among the most sensitive areas over the world for climate change and air quality issues, it still remains less studied than the oceanic regions. The domain investigated by the research ship Minerva Uno cruise in Summer 2015 was the Tyrrhenian Sea. An overview on the marine boundary layer (MBL) concentration levels of carbonyl compounds, ozone (O), and sulfur dioxide (SO) is reported. Read More

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http://link.springer.com/10.1007/s11356-019-04916-6
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http://dx.doi.org/10.1007/s11356-019-04916-6DOI Listing
April 2019
2 Reads

Characteristics of chemical reaction and convective boundary conditions in Powell-Eyring nanofluid flow along a radiative Riga plate.

Heliyon 2019 Apr 5;5(4):e01479. Epub 2019 Apr 5.

School of Mathematical Sciences, Zhejiang University, Hangzhou 310027, PR China.

A typical base fluid such as water, oil or glycol is poor conductor of heat due to deficient thermo-physical properties. This deficiency is normally addressed by saturation of thermally strong conductive metallic nanoparticles such as Fe, Ti, Hg, Cu, Au into the base fluid resulting a stronger thermal conductivity, electric conductivity, heat and mass flux of the so formulated nanofluid. Nanoparticles having a diameter size less than 100 nano-meter are preferred in this formulation because these nano-sized particles stay suspended into the base fluid for a longer time-period. Read More

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http://dx.doi.org/10.1016/j.heliyon.2019.e01479DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6451176PMC

Heat transfer enhancement in the boundary layer flow of hybrid nanofluids due to variable viscosity and natural convection.

Heliyon 2019 Apr 4;5(4):e01469. Epub 2019 Apr 4.

Department of Studies and Research in Mathematics, Kuvempu University, Shankaraghatta, 577 451, Shimoga, Karnataka, India.

The aim of the current work is to explore how heat transfer can be enhanced by variations in the basic properties of fluids in the presence of free convection with the aid of suspended hybrid nanofluids. Also, the influence of the Laurentz force on the flow is considered. The mathematical equations are converted into a pair of self-similarity equations by applying appropriate transformations. Read More

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http://dx.doi.org/10.1016/j.heliyon.2019.e01469DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6451174PMC

Phase-conjugate mirror for water waves driven by the Faraday instability.

Proc Natl Acad Sci U S A 2019 Apr 17. Epub 2019 Apr 17.

Institut Langevin, ESPCI Paris, PSL University, CNRS, 75005 Paris, France;

The Faraday instability appears on liquid baths submitted to vertical oscillations above a critical value. The pattern of standing ripples at half the vibrating frequency that results from this parametric forcing is usually shaped by the boundary conditions imposed by the enclosing receptacle. Here, we show that the time modulation of the medium involved in the Faraday instability can act as a phase-conjugate mirror--a fact which is hidden in the extensively studied case of the boundary-driven regime. Read More

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http://dx.doi.org/10.1073/pnas.1818742116DOI Listing
April 2019
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Decoding the Information Contained in Fluorophore Radiation Patterns.

ACS Nano 2018 Dec;12(12):11725-11730

CNRS, UMR 8118, Brain Physiology Laboratory , 45 rue des Saints Pères , Paris F-75006 France.

Dipole radiation patterns change when a fluorescent molecule comes close to the boundary between media of different refractive indices. Near-interface molecules emit mostly into the higher-index medium, predominantly around the critical angle. The radiation pattern encodes information about the emitter distance, orientation, and the refractive index of the embedding medium. Read More

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http://pubs.acs.org/doi/10.1021/acsnano.8b08696
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http://dx.doi.org/10.1021/acsnano.8b08696DOI Listing
December 2018
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Horizontal Boundary Cells, a Special Group of Somitic Cells, Play Crucial Roles in the Formation of Dorsoventral Compartments in Teleost Somite.

Cell Rep 2019 Apr;27(3):928-939.e4

Department of Biological Sciences, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. Electronic address:

Establishment of robust gene expression boundary is crucial for creating elaborate morphology during development. However, mechanisms underlying boundary formation have been extensively studied only in a few model systems. We examined the establishment of zic1/zic4-expression boundary demarcating dorsoventral boundary of the entire trunk of medaka fish (Oryzias latipes) and identified a subgroup of dermomyotomal cells called horizontal boundary cells (HBCs) as crucial players for the boundary formation. Read More

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http://dx.doi.org/10.1016/j.celrep.2019.03.068DOI Listing

Outer Retinal Oxidative Stress Measured In Vivo Using QUEnch-assiSTed (QUEST) OCT.

Invest Ophthalmol Vis Sci 2019 Apr;60(5):1566-1570

Visual Function Core, National Eye Institute, National Institutes of Health, Bethesda, Maryland, United States.

Purpose: To test the hypothesis that oxidative stress in the outer retina (OR = distance from external limiting membrane to the retinal pigment epithelium-choroid boundary) can be detected by using antioxidants (AOs) to correct an impaired light-evoked response as measured by optical coherence tomography (OCT).

Methods: C57BL/6J mice were maintained in the dark for ∼20 hours and studied by OCT before and after 1 hour of light exposure. OR thickness in dark or light was measured, and the light-dark difference (i. Read More

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http://iovs.arvojournals.org/article.aspx?doi=10.1167/iovs.1
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http://dx.doi.org/10.1167/iovs.18-26164DOI Listing
April 2019
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Cardiovascular Disease: Foreword.

Authors:
Mindy A Smith

FP Essent 2019 Apr;479

Michigan State University College of Human Medicine, 4155 Deep Lake Boundary Rd PMB 281, Colville, WA 99114,

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When Is It Ethical for Physician-Investigators to Seek Consent From Their Own Patients?

Am J Bioeth 2019 Apr;19(4):11-18

c University of Pennsylvania Perelman School of Medicine; Leonard Davis Institute of Health Economics.

Classic statements of research ethics advise against permitting physician-investigators to obtain consent for research participation from patients with whom they have preexisting treatment relationships. Reluctance about "dual-role" consent reflects the view that distinct normative commitments govern physician-patient and investigator-participant relationships, and that blurring the research-care boundary could lead to ethical transgressions. However, several features of contemporary research demand reconsideration of the ethics of dual-role consent. Read More

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https://www.tandfonline.com/doi/full/10.1080/15265161.2019.1
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http://dx.doi.org/10.1080/15265161.2019.1572811DOI Listing
April 2019
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Electrophoretic transport and dynamic deformation of bio-vesicles.

Electrophoresis 2019 Apr 16. Epub 2019 Apr 16.

Department of Mechanical Engineering, Southern Methodist University, Dallas, TX.

Study of the deformation dynamics of cells and other sub-micron vesicles, such as virus and neurotransmitter vesicles are necessary to understand their functional properties. This mechanical characterization can be done by submerging the vesicle in a fluid medium and deforming it with a controlled electric field, which is known as electrodeformation. Electrodeformation of biological and artificial lipid vesicles is directly influenced by the vesicle and surrounding media properties and geometric factors. Read More

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http://dx.doi.org/10.1002/elps.201900025DOI Listing

Spinal cord re-treatments using photon and proton based radiotherapy: LQ-derived tolerance doses.

Phys Med 2019 Apr 13. Epub 2019 Apr 13.

Green Templeton College, University of Oxford, 43 Woodstock Road, Oxford, OX2 6HG, United Kingdom.

Re-treatment, using megavoltage photon radiotherapy, can benefit carefully selected patients with new or recurrent tumours. Such re-treatments may involve the further exposure of tissues such as the brain or spinal cord. A time-dependent model has been developed, which incorporates data from all published radiobiological experiments concerned with the in vivo re-irradiation of the spinal cord using photons. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S11201797193008
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http://dx.doi.org/10.1016/j.ejmp.2019.04.005DOI Listing
April 2019
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Moving towards strategic commissioning: impact on clinical commissioning groups as membership organizations.

J Health Serv Res Policy 2019 Apr 16:1355819619842272. Epub 2019 Apr 16.

4 Postdoctoral Fellow, Department of Population Health, Luxembourg Institute of Health, Luxembourg.

Objective: This paper aims to explore the nature of clinical commissioning groups (CCGs) in England as membership organizations. Utilizing the concept of meta-organization as a lens, we discuss the impact that this organizational form might have on CCGs' ability to become 'strategic commissioners'.

Methods: We used a longitudinal qualitative approach to explore the adoption and implementation of primary care co-commissioning. Read More

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http://dx.doi.org/10.1177/1355819619842272DOI Listing

Effect of Patient Participation on Nurse and Patient Outcomes in Inpatient Healthcare.

Int J Environ Res Public Health 2019 Apr 15;16(8). Epub 2019 Apr 15.

La Trobe University Sydney Campus, Sydney 2000, Australia.

Using service-dominant logic as a theoretical lens, this study investigated the co-production of healthcare service and service value co-creation between nurses and patients. The main objective of this study was to: (1) examine the effect of patient participation on patient satisfaction and nurses' attitudes and behaviors; (2) examine boundary conditions of the effect of patient participation on patients and nurses. We proposed that patient participation positively impacted patient satisfaction and nurse job satisfaction, work engagement, and helping behaviors. Read More

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https://www.mdpi.com/1660-4601/16/8/1344
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http://dx.doi.org/10.3390/ijerph16081344DOI Listing
April 2019
1 Read