Search results for "programming"
showing 10 items of 3090 documents
Multiresolution Analysis for Irregular Meshes
2003
International audience; The concept of multiresolution analysis applied to irregular meshes has become more and more important. Previous contributions proposed a variety of methods using simplification and/or subdivision algorithms to build a mesh pyramid. In this paper, we propose a multiresolution analysis framework for irregular meshes with attributes. Our framework is based on simplification and subdivision algorithms to build a mesh pyramid. We introduce a surface relaxation operator that allows to build a non-uniform subdivision for a low computational cost. Furthermore, we generalize the relaxationoperator to attributes such as color, texture, temperature, etc. The attribute analysis…
The range of non-surjective convolution operators on Beurling spaces
1996
AbstractLet μ ≠ 0 be an ultradistribution of Beurling type with compact support in the space . We investigate the range of the convolution operator Tμ on the space of non-quasianalytic functions of Beurling type associated with a weight w, in the case the operator is not surjective. It is proved that the range of TM always contains the space of real-analytic functions, and that it contains a smaller space of Beurling type for a weight σ ≥ ω if and only if the convolution operator is surjective on the smaller class.
Sustainable European fishery and the Friend of the Sea scheme: tools to achieve sustainable development in the fishery sector
2015
This paper investigates the role of the Friend of the Sea (FOS) scheme as a market tool for sustainable competitive advantage. To capture this effect, we apply a theoretical framework based on the stakeholder theory (SHT) and the natural-resource-based view (NRBV) to two case studies each in Italy and Spain. Our model allows us to explain the main factors determining an effective and competitive sustainable business model in the fishery sector. The results confirm the relevant influence of market forces in acquiring FOS certification and the role of the same as a counterpart to state authority.
Bildning as a Central Concept in the Cultural Policy of the Swedish Government : From Arthur Engberg to Alice Bah Kuhnke
2015
This article explores bildning as a central concept in the development of the explicit cultural policy of the Swedish government. It takes its point of departure in how the concept of bildning was interpreted by Arthur Engberg, the minister responsible for cultural policy in the Social Democrat governments 1932–1939. In his interpretation bildning was liked both to upholding the high arts and the national culture and to the idea of re-invigorating these through cultural policy and education. The article continues by looking at the role and the interpretations of this concept in the later government reports and government bills aiming to cover the entirety of Swedish cultural policy, i.e. th…
Optical counterpart to Swift J0243.6+6124
2020
Context. Swift J0243.6+6124 is a unique system. It is the first and only ultra-luminous X-ray source in our Galaxy. It is the first and only high-mass Be X-ray pulsar showing radio jet emission. It was discovered during a giant X-ray outburst in October 2017. While there are numerous studies in the X-ray band, very little is known about the optical counterpart. Aims. Our aim is to characterize the variability timescales in the optical and infrared bands in order to understand the nature of this intriguing system. Methods. We performed optical spectroscopic observations to determine the spectral type. Long-term photometric light curves together with the equivalent width of the Hα line were u…
“The drops which fell from Shakespear’s Pen”: Hamlet in Contemporary Fiction
2012
Questions of gender, ethnicity and sexuality have all been raised by novelists intent on rewriting Shakespeare from the position of what have been seen as cultural margins. While discussions of such rewritings are ongoing, few concerted efforts have been made to trace a pattern in the treatment of Shakespearean allusion and adaptation at the hands of British and American writers of the literary mainstream. The present essay sets out to investigate the way in which three such writers —Ian McEwan, Graham Swift, and John Updike— employ allusion to/adaptations of Hamlet in their novels and what their respective stances reveal about their understanding of their role as canonical writers.
Properties of Swift's intermediate bursts
2011
Based on their prompt, high-energy emission, gamma-ray bursts are usually classified into short-duration and long-duration classes. A third intermediate group has been identified on statistical grounds but its individual properties have not yet been studied in detail. Using the large sample of follow-up observations of GRBs produced during the Swift era we analyze the individual characteristics of this group. We find that intermediate bursts are significantly different from short GRBs but share many properties with long bursts, probably pointing to a common progenitor type. However, we find that intermediate bursts are significantly dimmer and have on average lower redshifts. Based on their…
Swift observations of GRB 060614: an anomalous burst with a well behaved afterglow
2007
GRB 060614 is a remarkable GRB observed by Swift with puzzling properties, which challenge current progenitor models. The lack of any bright SN down to very strict limits and the vanishing spectral lags are typical of short GRBs, strikingly at odds with the long (102s) duration of this event. Here we present spectral and temporal analysis of the Swift observations. We show that the burst presents standard optical, UV and X-ray afterglows. An achromatic break is observed simultaneously in optical and X-rays, at a time consistent with the break in the R-band light curve measured by the VLT. The achromatic behaviour and the consistent post-break decay slopes make GRB 060614 one of the best exa…
Process and technology challenges in swift-starting virtual teams
2007
Originally published in the journal Information & Management : http://www.sciencedirect.com/science/journal/03787206 Virtual teams often face tight schedules and a need to start quickly and perform instantly. The goal of our study was to enhance understanding of the challenges faced by such teams. We used time–interaction–performance theory as the framework for following the processes and functions within virtual teams working on a systems development task. Our study provided a detailed examination of the group process, applied to virtual teams working under time pressure. The challenges faced by virtual teams in such settings showed that teams must work to enhance their effectiveness in mu…
Modeling and simulation of a digital control design approach for power supply systems
2006
Electronic designers need to model and simulate system features as close as possible to its effective behaviour. Moreover, today, electronics systems are often composed of mixed analog and digital components. The increasing complexity has led to the use of different simulation softwares, each one specific for a particular level of abstraction: mathematical, circuital, behavioural, etc. In order to simulate the entire system these softwares should work together: co-simulation is necessary for digitally controlled power electronics systems. In this paper, the modeling of a digitally controlled switching power supply system using MATLAB/Simulink, ALDEC Active-HDL and Powersys PSIM is presented…