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Search Results: 1 - 10 of 211000 matches for " Martín; Rousseaux "
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El consumo del agua por el cultivo de olivo (Olea europaea L.) en el noroeste de Argentina: una comparación con la Cuenca Mediterránea
Searles,Peter S; Agüero Alcarás,Martín; Rousseaux,María C;
Ecolog?-a austral , 2011,
Abstract: in the last 20 years, there has been a great expansion in the land area planted with olive trees (olea europaea l.) in the northwest of argentina (nwa). nevertheless, most of the information utilized in management decisions in the region concerning crop water use comes from the mediterranean basin. this review discusses: 1) differences in climate between the mediterranean basin and the olive production areas in the nwa, 2) water use by olive in the mediterranean and ecophysiological responses to water stress, and 3) experimental results from the nwa using aimogasta (la rioja) as a case study. meteorological data indicate that the air temperature (primarily in the winter and spring) and the annual potential evapotranspiration (eto) are higher in the nwa than in the mediterranean, while precipitation is less. differences in temperature have been shown to result in lack of chilling hours for flowering in some varieties, advances in phenological stages, and changes in oil quality and quantity in nwa relative to the mediterranean. experimental results from the mediterranean show that transpiration, yield, and other variables respond strongly to irrigation although olive is a species with a high tolerance to water stress in comparison to other fruit trees. similar to the mediterranean, olive water use in aimogasta was estimated to be 70-75% of eto under optimally irrigated conditions. considering the differences in the eto values in the two regions, water use is 1100-1200 mm/year in the nwa and 900-1000 in the mediterranean. additionally, the required irrigation is more than double due to the lack of precipitation in many areas. an unanticipated result in aimogasta based on the studies from the mediterranean was the excessive vegetative growth under high irrigation conditions. the excessive vigour was potentially a response to the irrigation in interaction with the high spring temperatures that occur in the region. the development of regulated deficit irrigation strategie
Peri-Orbital Non-Invasive and Painless Skin Tightening-Safe and Highly Effective Use of Multisource Radio-Frequency Treatment Platform  [PDF]
Isabelle Rousseaux
Journal of Cosmetics, Dermatological Sciences and Applications (JCDSA) , 2015, DOI: 10.4236/jcdsa.2015.53025
Abstract: The periorbital area is the third highest-ranking area for cosmetic surgery. However, surgery in this area presents a number of difficulties and safety concerns. First generation Monopolar RF treatments in this area were usually associated with considerable pain and long downtime. In the present clinical study, we used the iFine handpiece of the EndyMed PRO, multi-source phase-controlled radiofrequency (RF) for Non-invasive, pain free, skin rejuvenation of the periorbital area. The study included eleven (11) subjects, treated for periorbital signs of aging (iFine handpiece, EndyMed PRO platform, EndyMed Medical, Caesarea, Israel). The degree of clinical improvement was assessed by the global aesthetic improvement scale (GAIS) and subjects satisfaction by post treatment questionnaires. 91% of patients showed good to excellent improvement as a result of the treatment. Subjects satisfaction showed that 55% of patients reported that they were very satisfied, 45% were satisfied while none were dissatisfied. There were no incidences of infections, scarring, hypopigmentation, or any other serious complications.
Commentaire : Des archives judiciaires aux archives de la régulation sociale : autour des usages sociaux de la justice
Xavier Rousseaux
Atelier du Centre de Recherches Historiques , 2009, DOI: 10.4000/acrh.1719
Abstract: Si les archives judiciaires posent à leur lecteurs et lectrices des questions fondamentales sur les rapports entre l’oral et l’écrit, si elles sont le produit de modes des résolutions des conflits et expriment des conflits entre juridictions et pouvoirs, si elles évoquent des catégories mentales et de représentations sociales comme des expressions corporelles et des émotions, elles sont également révélatrices des usages sociaux de justice par les différents acteurs.La session consacrées aux u...
La collection, un lieu privilégié pour penser ensemble singularité et synthèse .
Francis Rousseaux
EspacesTemps.net , 2006,
Abstract: Les sciences sociales ont souvent maille à partir avec la singularité et la synthèse, qui travaillent au corps leurs hypothèses et leurs régimes, mais qui sont rarement prises pour elles-mêmes comme objets d’étude. Ceci n’est pas innocent, et tient à ce que singularité et synthèse ont en commun qu’il est difficile de les penser sans provoquer leur conversion spontanée. La pensé affecte directement leur nature, qui para t être de lui rester cachée, sous peine de ...
Galilean Covariance versus Gauge Invariance
Germain Rousseaux
Physics , 2009,
Abstract: We demonstrate for the first time and unexpectedly that the Principle of Relativity dictates the choice of the "gauge conditions" in the canonical example of a Gauge Theory namely Classical Electromagnetism. All the known "gauge conditions" of the literature are interpreted physically as electromagnetic continuity equations hence the "gauge fields". The existence of a Galilean Electromagnetism with TWO dual limits ("electric" and "magnetic") is the crux of the problem [1]. A phase-space with the domains of validity of the various "gauge conditions" is provided and is shown to depend on three characteristic times : the magnetic diffusion time, the charge relaxation time and the transit time of electromagnetic waves in a continuous medium [2].
The Basics of Water Waves Theory for Analogue Gravity
Germain Rousseaux
Physics , 2012, DOI: 10.1007/978-3-319-00266-8_5
Abstract: This chapter gives an introduction to the connection between the physics of water waves and analogue gravity. Only a basic knowledge of fluid mechanics is assumed as a prerequisite.
The gauge non-invariance of Classical Electromagnetism
Germain Rousseaux
Physics , 2005,
Abstract: "Physical theories of fundamental significance tend to be gauge theories. These are theories in which the physical system being dealt with is described by more variables than there are physically independent degree of freedom. The physically meaningful degrees of freedom then reemerge as being those invariant under a transformation connecting the variables (gauge transformation). Thus, one introduces extra variables to make the description more transparent and brings in at the same time a gauge symmetry to extract the physically relevant content. It is a remarkable occurrence that the road to progress has invariably been towards enlarging the number of variables and introducing a more powerful symmetry rather than conversely aiming at reducing the number of variables and eliminating the symmetry" [1]. We claim that the potentials of Classical Electromagnetism are not indetermined with respect to the so-called gauge transformations. Indeed, these transformations raise paradoxes that imply their rejection. Nevertheless, the potentials are still indetermined up to a constant.
The flow induced by a mock whale : origin of flukeprint formation
Germain Rousseaux
Physics , 2012,
Abstract: Fluke oscillations of cetaceans (whales, dolphins and porpoises) imprint the ocean surface with an oval patch that surface waves cannot enter. Scientists have hypothesized that modification of surface tension by surfactants creates flukeprints. Here, we show, on the contrary, that the formation of flukeprint is primarily due to a wave-current interaction problem. We provide Particle Image Velocimetry measurements of anisotropy and vorticity in the flow generated by a mock whale fluke in a laboratory experiment. We explain for the first time why long gravity waves enter the flukeprint, whereas short gravity waves are blocked.
On the physical meaning of the gauge conditions of Classical Electromagnetism : the hydrodynamics analogue viewpoint
Germain Rousseaux
Physics , 2005,
Abstract: Based on an analogy between Fluid Mechanics and Electromagnetism, we claim that the gauge conditions of Classical Electromagnetism are not equivalent contrary to the common belief. These "gauges" are usually considered as mathematical conditions that one must specify in order to solve any electromagnetic problem. Here, the author shows that these conditions are physical constraints which can be interpreted as electromagnetic continuity equations. As a consequence, light cannot be considered as a pure transverse wave in vacuum from the point of view of the potentials. We discuss the (lack of) meaning of gauge transformations.
Comment on the paper by Rovelli & al. about the compatibility of various "gauge conditions"
Germain Rousseaux
Physics , 2007,
Abstract: The compatibility "demonstrated" by Rovelli & al. between various "gauge conditions" both in Classical Electromagnetism and General Relativity can be better understood if one distinguishes "gauge conditions" of the solution type and "gauge conditions" of the constraint type.
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