27,262 research outputs found
The cloud paradigm: Are you tuned for the lyrics?
Major players, business angels and opinion-makers are broadcasting beguiled
lyrics on the most recent IT hype: your software should ascend to the clouds.
There are many clouds and the stake is high. Distractedly, many of us became
assiduous users of the cloud, but perhaps due to the legacy systems and legacy
knowledge, IT professionals, mainly those many that work in business
information systems for the long tail, are not as much plunged into producing
cloud-based systems for their clients.
This keynote will delve into several aspects of this cloud paradigm, from
more generic concerns regarding security and value for money, to more specific
worries that reach software engineers in general. Do we need a different
software development process? Are development techniques and tools mature
enough? What about the role of open-source in the cloud? How do we assess the
quality in cloud-based development? Please stay tuned for more!Comment: Position paper to introduce a keynote, proceedings of WAMPS'2011 - VI
Annual MPS.BR Workshop, pp. 20-25, Campinas, Brazil, October 201
Charmed mesons at finite temperature and chemical potential
We compute the masses of the pseudoscalar mesons , and at
finite temperature and baryon chemical potential. The computations are based on
a symmetry- preserving Dyson-Schwinger equation treatment of a vector-vector
four quark contact interaction. The results found for the temperature
dependence of the meson masses are in qualitative agreement with lattice QCD
data and QCD sum rules calculations. The chemical potential dependence of the
masses provide a novel prediction of the present computation
Optimal random sampling designs in random field sampling
A Horvitz-Thompson predictor is proposed for spatial sampling when the characteristic of interest is modeled as a random field. Optimal sampling designs are deduced under this context. Fixed and variable sample size are considered
The Importance of Food Perception in Food Choices and Nutrition
Nowadays, there is a growing interest in understanding and modulating consumer choices, both for healthy and economic
reasons. However, food preferences are influenced by a diversity of factors, which interact among them to a final behaviour.
The understanding of food choices is linked with the comprehension of how consumers perceive food and how the different
levels of perception (sensorial, psychological, socio-economic) affect those choices. Traditionally, the effect of each discipline
was studied independently. Nowadays, the complexity inherent to the decision process is recognized and multidisciplinary studies, where the different dimensions of choices are considered, are increasing.
Motivation for consumption is greatly affected by the way individuals identify food. This recognition should be considered
at different levels: sensorial, emotional, social and physiological. As such, variability in food characteristics, including food
constituents and technological processing, as well as variations in individuals’ characteristics, such as believes, experiences and
physiology, and variations in the context in which food is experienced, can greatly affect the final perception.FC
A contour matching approach for accurate NOAA-AVHRR image navigation
Although different methods for NOAA AVHRR image navigation have already been established, the multitemporal and multi-satellite character of most studies requires automatic and accurate methods for navigation of satellite images. In the proposed method, a simple Kepplerian orbital model for the NOAA satellites is considered as reference model, and mean orbital elements are given as input to the model from ephemeris data. In order to correct the errors caused by these simplifications, errors resulting from inaccuracies in the positioning of the satellite and failures in the satellite internal clock, an automatic global contour matching approach has been adopted. First, the sensed image is preprocessed to obtain a gradient energy map of the reliable areas (sea-land contours) using a cloud detection algorithm and a morphological gradient operator. An initial estimation of the reliable contour positions is automatically obtained. The final positions of the contours are obtained by means of an iterative local minimization procedure that allows a contour to converge on an area of high image energy (edge). Global transformation parameters are estimated based on the initial and final positions of all reliable contour points. Finally, the performance of this approach is assessed using NOAA 14 AVHRR images from different geographic areas.Postprint (published version
Parametric Design of Minimal Mass Tensegrity Bridges Under Yielding and Buckling Constraints
This paper investigates the use of the most fundamental elements; cables for
tension and bars for compression, in the search for the most efficient bridges.
Stable arrangements of these elements are called tensegrity structures. We show
herein the minimal mass arrangement of these basic elements to satisfy both
yielding and buckling constraints. We show that the minimal mass solution for a
simply-supported bridge subject to buckling constraints matches Michell's 1904
paper which treats the case of only yield constraints, even though our boundary
conditions differ. The necessary and sufficient condition is given for the
minimal mass bridge to lie totally above (or below) deck. Furthermore this
condition depends only on material properties. If one ignores joint mass, and
considers only bridges above deck level, the optimal complexity (number of
elements in the bridge) tends toward infinity (producing a material continuum).
If joint mass is considered then the optimal complexity is finite. The optimal
(minimal mass) bridge below deck has the smallest possible complexity (and
therefore cheaper to build), and under reasonable material choices, yields the
smallest mass bridge.Comment: 56 pages, 25 figures, 13 tables. Internal Report 2014-1: University
of California, San Diego, 201
The great good place : coworking como espaço para aprender design uma framework exploratória
Abstract : In this paper we explore a conceptual framework based on
three lines of thinking/work from Patrick Cohendet
(Underground/Middleground/Upperground), Ray Oldenburg (The Great
Good Place), and Fred Garneti (Heutagogy or Self-determined Learning).
To demonstrate the relevance and feasibility of our proposed concept, we
review the key factors and definitions of these authors and their
work. Although not a theoretical framework, the present
paper aims to help us map a part of our research work within the context
of the Doctoral Programme in Design at IADE / Universidade Europeia,
which triangulates Coworking, Design Learning, and Heutagogy or selfdetermined
modes of learning. Ultimately, the aim is to generate
new evidence on how such a model of Coworking Design Learning can
benefit and betier suit contemporary Design learners.Neste artigo, exploramos uma estrutura conceptual baseada
em três linhas de pensamento dos autores Patrick Cohendet
(Underground / Middleground / Upperground), Ray Oldenburg (The Great
Good Place) e Fred Garneti (Heutagogy or Self-determined Learning).
Para demonstrar a relevância e a viabilidade da nossa proposta
conceptual, revisitamos os principais fatores e definições destes autores e
dos seus trabalhos. Embora não constitua uma framework teórica, o
presente trabalho tem como objetivo ajudar a mapear parte do nosso
trabalho de pesquisa no contexto do Programa de Doutoramento em
Design do IADE / Universidade Europeia, que triangula Coworking,
Aprendizagem de Design e Heutagogia ou modos autodeterminados de
aprendizagem. Em última instância, o objetivo é tentar produzir novas
evidências sobre como um modelo de aprendizagem de Design baseado
em espaços de Coworking pode beneficiar e adequar-se melhor aos
actuais alunos de Design.info:eu-repo/semantics/publishedVersio
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