27,492 research outputs found
Michel Corajoud and Parc Départemental du Sausset
Among the many significant contributions France has made to contemporary landscape architecture, Michel Corajoud counts as one of the towering figures and his Parc Départemental du Sausset as one of the great park visions of the 1980s. In France, and beyond, Corajoud has emerged as one of the protagonists of the great era that this decade has come to be considered in landscape architecture. He was the primary promoter of teaching landscape in France, the creator of the first landscape architecture school (ENSP at Versailles), a visionary and able designer of large projects.
If Parc de la Villette can be considered the most significant project of this period, in terms of innovation of public open spaces, Parc Départemental du Sausset is, for its large and complex vision, an exemplary model of a periurban park that combines rural fringe, suburban settlements, and urban infrastructure with an ecological sensitivity that had not previously been envisioned in other parks. Sausset is a project that works on all scales of the landscape, from the garden to the natural park, and to agriculturalfields.
It makes multiple references to French landscape history. It presents itself as an ever-changing place, where landscape processes, with their evolutionary dynamics, can be perceived and witnessed by its users. Above all, Sausset is a park that successfully defines the philosophical dialectics between modernity and post-modernity by expressing a tension between innovation and the revival of a strong tradition
On-Line Instruction-checking in Pipelined Microprocessors
Microprocessors performances have increased by more than five orders of magnitude in the last three decades. As technology scales down, these components become inherently unreliable posing major design and test challenges. This paper proposes an instruction-checking architecture to detect erroneous instruction executions caused by both permanent and transient errors in the internal logic of a microprocessor. Monitoring the correct activation sequence of a set of predefined microprocessor control/status signals allow distinguishing between correctly and not correctly executed instruction
The Art of Fault Injection
Classical greek philosopher considered the foremost virtues to be temperance, justice, courage, and prudence. In this paper we relate these cardinal virtues to the correct methodological approaches that researchers should follow when setting up a fault injection experiment. With this work we try to understand where the "straightforward pathway" lies, in order to highlight those common methodological errors that deeply influence the coherency and the meaningfulness of fault injection experiments. Fault injection is like an art, where the success of the experiments depends on a very delicate balance between modeling, creativity, statistics, and patience
Two-walker discrete-time quantum walks on the line with percolation
One goal in the quantum-walk research is the exploitation of the intrinsic
quantum nature of multiple walkers, in order to achieve the full computational
power of the model. Here we study the behaviour of two non-interacting
particles performing a quantum walk on the line when the possibility of lattice
imperfections, in the form of missing links, is considered. We investigate two
regimes, statical and dynamical percolation, that correspond to different time
scales for the imperfections evolution with respect to the quantum-walk one. By
studying the qualitative behaviour of three two-particle quantities for
different probabilities of having missing bonds, we argue that the chosen
symmetry under particle-exchange of the input state strongly affects the output
of the walk, even in noisy and highly non-ideal regimes. We provide evidence
against the possibility of gathering information about the walkers
indistinguishability from the observation of bunching phenomena in the output
distribution, in all those situations that require a comparison between
averaged quantities. Although the spread of the walk is not substantially
changed by the addition of a second particle, we show that the presence of
multiple walkers can be beneficial for a procedure to estimate the probability
of having a broken link.Comment: 16 pages, 9 figure
Drift Correction Methods for gas Chemical Sensors in Artificial Olfaction Systems: Techniques and Challenges
In this chapter the authors introduce the main challenges faced when developing drift correction techniques and will propose a deep overview of state-of-the-art methodologies that have been proposed in the scientific literature trying to underlying pros and cons of these techniques and focusing on challenges still open and waiting for solution
Localization-like effect in two-dimensional alternate quantum walks with periodic coin operations
Exploiting multi-dimensional quantum walks as feasible platforms for quantum
computation and quantum simulation is attracting constantly growing attention
from a broad experimental physics community. Here, we propose a two-dimensional
quantum walk scheme with a single-qubit coin that presents, in the considered
regimes, a strong localization-like effect on the walker. The result could
provide new possible directions for the implementation of quantum algorithms or
from the point of view of quantum simulation. We characterize the
localization-like effect in terms of the parameters of a step-dependent qubit
operation that acts on the coin space after any standard coin operation,
showing that a proper choice can guarantee a non-negligible probability of
finding the walker in the origin even for large times. We finally discuss the
robustness to imperfections, a qualitative relation with coherences behavior,
and possible experimental realizations of this model with the current
state-of-the-art settings.Comment: 5 pages, 4 figures, RevTeX
Cell-to-Cell Communication in Learning and Memory: From Neuro- and Glio-Transmission to Information Exchange Mediated by Extracellular Vesicles
Most aspects of nervous system development and function rely on the continuous crosstalk between neurons and the variegated universe of non-neuronal cells surrounding them. The most extraordinary property of this cellular community is its ability to undergo adaptive modifications in response to environmental cues originating from inside or outside the body. Such ability, known as neuronal plasticity, allows long-lasting modifications of the strength, composition and efficacy of the connections between neurons, which constitutes the biochemical base for learning and memory. Nerve cells communicate with each other through both wiring (synaptic) and volume transmission of signals. It is by now clear that glial cells, and in particular astrocytes, also play critical roles in both modes by releasing different kinds of molecules (e.g., D-serine secreted by astrocytes). On the other hand, neurons produce factors that can regulate the activity of glial cells, including their ability to release regulatory molecules. In the last fifteen years it has been demonstrated that both neurons and glial cells release extracellular vesicles (EVs) of different kinds, both in physiologic and pathological conditions. Here we discuss the possible involvement of EVs in the events underlying learning and memory, in both physiologic and pathological condition
EDACs and test integration strategies for NAND flash memories
Mission-critical applications usually presents several critical issues: the required level of dependability of the whole mission always implies to address different and contrasting dimensions and to evaluate the tradeoffs among them. A mass-memory device is always needed in all mission-critical applications: NAND flash-memories could be used for this goal. Error Detection And Correction (EDAC) techniques are needed to improve dependability of flash-memory devices. However also testing strategies need to be explored in order to provide highly dependable systems. Integrating these two main aspects results in providing a fault-tolerant mass-memory device, but no systematic approach has so far been proposed to consider them as a whole. As a consequence a novel strategy integrating a particular code-based design environment with newly selected testing strategies is presented in this pape
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