In this paper, we present Brook for GPUs, a system for general-purpose computation on programmable graphics hardware. Brook extends C to include simple data-parallel constructs, enabling the use of the GPU as a streaming co-processor. We present a compiler and runtime system that abstracts

, it is absolutely necessary to obtain a real time rendering of the virtual world, as natural and realistic as possible. That is why we focus our work on an image based approach, avoiding the slow and heavy handling of 3D models of the scene, generally not very realistic and typical in geometry based approaches

Tocqueville. Chief among them was Robert D. Putnam, who in Bowling Alone enshrined Tocqueville as "patron saint" of the social capital approach to emphasize the civic Int J Polit Cult Soc DOI 10.1007/s10767-013-9170-7 F. C. da Silva (*) : T. N. Clark : S. Cabaço University of Lisbon, Lisbon

Abstract. Why do parasites harm their hosts? The general understanding is that if the transmission rate and virulence of a parasite are linked, then the parasite must harm its host to maximize its transmission. The exact nature of such trade-offs remains largely unclear, but for vertebrate hosts

-French bilinguals. Analyses of variance (ANOVAs) with three variables (language group of the participants, language of the words, and word frequency) revealed a reliable main effect of word frequency, F 1 (3, 168) ϭ 39.53, MSE ϭ 238, p Ͻ .01, and F 2 (3, 306) ϭ 19.67, MSE ϭ 713, p Ͻ .01, but this effect

, possibly by titrating Cln3. Since Rpd3 is the yeast ortholog of mammalian HDAC1, there is now a virtually complete analogy between the proteins regulating cell cycle entry in yeast (SBF, Cln3, Whi5 and Stb1, Rpd3) and mammals (E2F, Cyclin D, Rb, HDAC1). The cell may titrate Cln3 molecules against

This paper describes recent work on mapping from an abstract intelligent physical modelling system to a virtual modelling environment f o r design visualization. But the paper also addresses related questions: Why is there a current revival of interest in these techniques? What is diflerent now

changes to ap-plications or device drivers and providing fault and device data isolation between guest VMs despite device driver bugs. We implement Paradice for x86, the Xen hypervisor, and the Linux and FreeBSD OSes. Our implementation paravirtual-izes various GPUs, input devices, cameras, an audio

) replication and proactive recovery offer a powerful com-bination to tolerate and overcome these kinds of faults, thereby enabling long-term service provision. BFT replica-tion is commonly associated with the overhead of 3f + 1 replicas to handle f faults. Using a trusted component, some previous systems were

ii iv vTo my parents vi vii Acknowledgements I would first and foremost extend my whole-hearted gratitude to my advisors, An-drea Arpaci-Dusseau and Remzi Arpaci-Dusseau. Andrea and Remzi are the reason that I had the opportunity for this exceptional Ph.D. journey. To this day, I still re-member the moment when they took me as their student and the joy and hope in my heart. Andrea and Remzi have showed me what systems research is like and how much fun and challenging it can be. Before this journey with them, I had always liked and believed in the beauty of mathematics and theory. My initial interest in systems research happened when I took Remzi’s Advanced Operating Systems