1,721,027 research outputs found
JETSPIN: A specific-purpose open-source software for simulations of nanofiber electrospinning
Get PDFAbstractWe present the open-source computer program JETSPIN, specifically designed to simulate the electrospinning process of nanofibers. Its capabilities are shown with proper reference to the underlying model, as well as a description of the relevant input variables and associated test-case simulations. The various interactions included in the electrospinning model implemented in JETSPIN are discussed in detail. The code is designed to exploit different computational architectures, from single to parallel processor workstations. This paper provides an overview of JETSPIN, focusing primarily on its structure, parallel implementations, functionality, performance, and availability.Program summaryProgram title: JETSPINCatalogue identifier: AEXQ_v1_0Program summary URL: http://cpc.cs.qub.ac.uk/summaries/AEXQ_v1_0.htmlProgram obtainable from: CPC Program Library, Queen’s University, Belfast, N. IrelandLicensing provisions: Open Software License v. 3.0No. of lines in distributed program, including test data, etc.: 12996No. of bytes in distributed program, including test data, etc.: 120019Distribution format: tar.gzProgramming language: Fortran 90.Computer: All Linux based workstations and parallel supercomputers, Windows and Apple machines.Operating system: Linux, OS X, Windows.Has the code been vectorized or parallelized?: Code is parallelizedRAM: 2+ GigabytesClassification: 4.3, 7.7, 10, 12.Nature of problem: Dynamics of the electrospinning process to produce nanofibersSolution method: Numerical solutions to the equations of motion of a Lagrangian discrete modelRunning time: A few seconds up to several hours, depending on size of the underlying jet representation
Different regimes of the uniaxial elongation of electrically charged viscoelastic jets due to dissipative air drag
No full textDissolution of variable-in-shape drug particles via the level-set method
No full textIn this work, we deal with a mathematical model describing the dissolution process of irregularly shaped particles. In particular, we consider a complete dissolution model accounting for surface kinetics, convective diffusion, and relative velocity between fluid and dissolving particles, for three drugs with different solubility and wettability: theophylline, griseofulvin, and nimesulide. The possible subsequent recrystallization process in the bulk fluid is also considered. The governing differential equations are revisited in the context of the level-set method and Hamilton-Jacobi equations, then they are solved numerically. This choice allows us to deal with the simultaneous dissolution of hundreds of different polydisperse particles. We show the results of many computer simulations which investigate the impact of the particle size, shape, area/volume ratio, and the dependence of the interfacial mass transport coefficient on the surface curvature
Reversible splenial lesion and complex visual disturbances due to carbamazepine withdrawal.
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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Continuum Models of Drug Transport to Multiple Cell−Type Population
No full textThe principal aim underlying the development of drugs and their administration is to
elicit some subcellular level biochemical reaction (often occurring within the cells).
Mathematical and pharmacokinetic models have been developed in order to aid researchers by determining the conditions that will control successful delivery of the
drug to its target (or the conditions that will limit unintended reactions). Often the
models evaluate the transport of the drug at the tissue scale; for example, in order to
determine the maximum penetration depth (at some prescribed drug concentration)
from the location of administration into poorly vascularized tissu
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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