Le plan des espaces boisés, un outil de gestion des espaces forestiers et sub-forestiers. L'exemple de La Colle-sur-Loup (Alpes-Maritimes)

La D.D.A.F. des Alpes Maritimes a entrepris une cartographie systématique à grande échelle des espaces boisés portant, dans un premier temps, sur l'ensemble des communes concernées par les trois Schémas directeurs d'aménagement et d'urbanisme de la zone littorale. Cette note se propose de fournir un commentaire de la carte réalisée pour une commune sub-littorale : la Colle-sur-Loup et de le compléter par des renseignements d'autres sources susceptibles d'être utiles lors de la définition de plans stratégiques de gestion des espaces forestiers et sub-forestiers

Thoracic Endovascular Aortic Repair for Type B Acute Aortic Dissection Complicated by Descending Thoracic Aneurysm

OBJECTIVES: To analyse the results and review the literature about thoracic aortic endovascular repair (TEVAR) for type B acute aortic dissection (TBAAD) complicated by descending thoracic aortic aneurysm (DTA) in the hyperacute or acute phases. METHODS: This was a multicentre, observational descriptive study. Inclusion criteria were TBAAD with a DTA of 6550 mm, TBAAD on an already known aneurysmal descending thoracic aorta, and TBAAD presenting with an enlarged aorta with a total diameter <50 mm, but with >50% diameter increase compared with a previous computed tomography angiography (CTA) showing a non-dissected aorta with normal sizing. Primary endpoints were early and long-term survival, freedom from TEVAR and aortic related mortality (ARM), and freedom from re-intervention. RESULTS: Twenty-two patients were included in the analysis. The mean aortic diameter was 66 \ub1 26 mm (range 42-130; IQR 51-64). The in hospital TEVAR related mortality was 14% (n = 3). The mean radiological follow-up was 56 \ub1 45 months (range 6-149; IQR 12-82), and the follow-up index 0.97 \ub1 0.1. All surviving patients were available for follow-up. During follow-up the cumulative mortality was 26% (n = 5) and TEVAR related mortality was 5% (n = 1). Overall the estimate of survival was 82% (95%CI: 61.5-93) at 1 year, and 64% at 5 years. Ongoing primary clinical success was 79% (re-intervention n = 4). Freedom from aortic related mortality was 86% (95%CI: 66-95) at 1 and 5 year, while freedom from re-intervention was 95% (95%CI: 75.5-95) at 1 year, and 77% (95%CI: 50-92) at 5 years. CONCLUSIONS: In our experience, DTA is a frequent complication from the very beginning of the clinical onset of TBAAD. In this high-risk cohort, TEVAR showed satisfactory results, better than those predicted by the risk score for open repair, with favourable stability of the aortic diameter and no aortic related adverse events during follow-up

On the design of reversible QDCA systems.

This work is the first to describe how to go about designing a reversible QDCA system. The design space is substantial, and there are many questions that a designer needs to answer before beginning to design. This document begins to explicate the tradeoffs and assumptions that need to be made and offers a range of approaches as starting points and examples. This design guide is an effective tool for aiding designers in creating the best quality QDCA implementation for a system

Anemos : development of a next generation wind power forecasting system for the large-scale integration of onshore & offshore wind farms

International audienceThis paper presents the objectives and the research work carried out in the frame of the ANEMOS project on short-term wind power forecasting. The aim of the project is to develop accurate models that substantially outperform current state-of-the-art methods, for onshore and offshore wind power forecasting, exploiting both statistical and physical modeling approaches. The project focus on prediction horizons up to 48 hours ahead and investigates predictability of wind for higher horizons up to 7 days ahead useful i.e. for maintenance scheduling. Emphasis is given on the integration of highresolution meteorological forecasts. For the offshore case, marine meteorology is considered as well as information by satellite-radar images. An integrated software platform, ‘ANEMOS', is developed to host the various models. This system will be installed by several utilities for on-line operation at onshore and offshore wind farms for prediction at a local, regional and national scale. The applications include different terrain types and wind climates, on- and offshore cases, and interconnected or island grids. The on-line operation by the utilities will allow validation of the models and an analysis of the value of wind prediction for a competitive integration of wind energy in the developing liberalized electricity markets in the EU

Transport properties of nitrogen doped p‐gallium selenide single crystals

Nitrogen doped gallium selenide single crystals are studied through Hall effect and photoluminescence measurements in the temperature ranges from 150 to 700 K and from 30 to 45 K, respectively. The doping effect of nitrogen is established and room temperature resistivities as low as 20 Ω cm are measured. The temperature dependence of the hole concentration can be explained through a single acceptor‐single donor model, the acceptor ionization energy being 210 meV, with a very low compensation rate. The high quality of nitrogen doped GaSe single crystals is confirmed by photoluminescence spectra exhibiting only exciton related peaks. Two phonon scattering mechanisms must be considered in order to give quantitative account of the temperature dependence of the hole mobility: scattering by 16.7 meV A′1 homopolar optical phonons with a hole‐phonon coupling constant g2=0.115 and scattering by 31.5 meV LO polar phonon with a hole Fröhlich constant αh⊥[email protected]

Percolation and cluster distribution. III. Algorithms for the site-bond problem

Algorithms for estimating the percolation probabilities and cluster size distribution are given in the framework of a Monte Carlo simulation for disordered lattices for the generalized site-bond problem. The site-bond approach is useful when a percolation process cannot be exclusively described in the context of pure site or pure bond percolation. An extended multiple labeling technique (ECMLT) is introduced for the generalized problem. The ECMLT is applied to the site-bond percolation problem for square and triangular lattices. Numerical data are given for lattices containing up to 16 million sites. An application to polymer gelation is suggested.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/45140/1/10955_2005_Article_BF01011170.pd

Transversal instabilities and regular arrangements of umbilics in dynamically excited nematic liquid crystal layers

Homeotropically aligned layers of nematic liquid crystal (NLC) were dynamically excited by impulsive voltage waveforms having repetition periods close or larger than the decay time of the elastic deformation of the layer. In such conditions the magnitude of the tilt was found to be described by an unidimensional model neglecting conduction currents. With a proper treatment of the aligning surfaces, we observed uniform tilts only for repetition periods shorter than an « interaction time ». The transversal instabilities that have been found for greater repetition times were experimentally studied and their descriptions and photographs are given. Under certain conditions regular arrangements of umbilics were found. Their study was made for thicknesses of the NLC layer ranging between 0.15 and 4 µm. Spacial periods in the range 0.25-11 mm were found, growing with the NLC thickness. A model for them was found, made-up of + 1 splay-type umbilics alternated with — 1 ones at the corners of squares. Together with the periodic patterns, domains of reverse tilts were found to exist, giving rise in some cases to intersecting periodic patterns