1,720,982 research outputs found
Description of Mesoscopic Model code and data structures : software design document : deliverable 3.2
No full textThis document is intended to draw the guidelines for the software developing
process related to the NanoDome Project. As a SDD, Software Design Docu-
ment, it follows the IEEE 1016-2009 Standard.
The objective of this deliverable is to describe the software design choices moti-
vated by the various aspects and concerns related to the developing of a simu-
lation environment for a mesoscale system. The model described in Deliverable
3.1 (D3.1) [2] will cover the length scale between the atomistic (≈ 10 −10 m) and
the continuum (≈ 10 −4 m) scales in order to study the behavior of the industri-
ally relevant nanoparticles synthesis processes from gaseous phase that occurs at
mesoscopic scale (≈ 10 −8 − 10 −5 m). Nanoparticle synthesis processes are cru-
cial for the mass production of industrial manufactures based on nanomaterials
or nanopowders (cellular batteries, etc . . . ).
The goal of this project is to provide a complete software environment to
model and predict the behavior of nanoparticles synthesis process of different
materials (e.g. Si, Al, ZnO), starting from precise material data emerging from
the atomistic scale. The model is intended to be connected (coupled or linked)
with continuum simulation (eg. CFD simulation) of industrial scale reactors in
order to provide data to the bigger scale for guiding the simulation and retrieve
data from the bigger scale to enhance the mesoscopic simulation itself
H2020 NanoDome Project: A Multiscale Approach to Gas Phase Nanoparticle Synthesis : Abstract
Full text linkPhysical-mathematical Description of the NanoDome Mesoscopic Model : deliverable 3.1
No full textThis document summarizes the physical-mathematical framework of the mesoscopic model for gas phase condensation nanoparticle synthesis to be used within the NanoDome project
Interface and Linking Description Document : specification of data format and functions : deliverable 4.1
No full textThis document is to be intended as an extension of the NanoDome Deliverable 3.2. Follow-
ing the directives described in D.3.2, this can be considered a part of an SDD.
Software Design Document (ISO 1016 2009 [1]) and the design views addressed
here are the ones related to the file formats for loading and managing the data
provided by the atomistic scale Molecular Dynamics simulations, files for linking
with other CFD simulation environments and the definition of the API functions
for coupling the mesoscale simulation with the continuum regime
Route relaxations on GPU for vehicle routing problems
No full textState-Space Relaxation (SSR) is an approach often used to compute by dynamic programming (DP) effective bounds for many combinatorial optimization problems. Currently, the most effective exact approaches for solving many Vehicle Routing Problems (VRPs) are DP algorithms making use of SSR for computing their bounding components. In particular, most of these make use of the q-route and ng-route relaxations. The bounding procedures based on these relaxations provide good quality bounds but they are often time consuming to compute, even for moderate size instances. In this paper we investigate the use of GPU computing for solving q-route and ng-route relaxations. The results prove that the proposed GPU implementations are able to achieve remarkable computing time reductions, up to 40 times with respect to the sequential versions
Client-side Computational Optimization
No full textMobile platforms have matured to a point where they can provide the infrastructure required to support sophisticated optimization codes. This opens the possibility to envisage new interest for distributed application codes and the opportunity to intensify research on optimization algorithms requiring limited computational resources, as provided by mobile platforms.
In this article, we report on some exploratory experience in this area. We illustrate some practical, real-world cases where running optimization programs on mobile or embedded devices can be useful, with particular emphasis on matheuristics approaches. Then, we discuss a practical use case involving the feasibility version of the generalized assignment problem (GAP). We present a JavaScript implementation of a GAP solver that can be executed inside an ordinary browser supporting ECMAScript. We tested the code on different smartphones of varying age and power, as well as on desktop PCs and other embedded devices. Our experiments confirm the viability of mobile devices for computational intensive tasks
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Variations on the Author
Full text link“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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