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Search Results: 1 - 10 of 82 matches for " Canosa "
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Gas phase reactive collisions, experimental approach
Canosa A.
EPJ Web of Conferences , 2012, DOI: 10.1051/epjconf/20111802003
Abstract: Since 1937 when the first molecule in space has been identified, more than 150 molecules have been detected. Understanding the fate of these molecules requires having a perfect view of their photochemistry and reactivity with other partners. It is then crucial to identify the main processes that will produce and destroy them. In this chapter, a general view of experimental techniques able to deliver gas phase chemical kinetics data at low and very low temperatures will be presented. These techniques apply to the study of reactions between neutral reactants on the one hand and reactions involving charge species on the other hand.
Casi-mercados, segregación escolar y desigualdad educativa: una trilogía con final abierto
Canosa, Miguel ángel Alegre;
Educa??o & Sociedade , 2010, DOI: 10.1590/S0101-73302010000400006
Abstract: the expansion of the quasi-market logics within the (re)configuration of school regimes has affected the articulation of the school supply as well as the school demand side. with regard to the latter, market policies have been addressed to widen the margin of parental school choice. with regard to the supply side, and beyond the strength of the dynamics of privatization, these same policies have lead to increase the margins of school autonomy at different levels (curriculum design, personnel management, students' admission...). from a european and critical perspective, in this article i review some of the negative impacts these processes can have in the field of school segregation and inequality, and examine key arguments which contribute to understanding the nature and implications of such impacts.
Figuras de la antipolítica en Carl Schmitt
Páez Canosa, Rodrigo;
Kriterion: Revista de Filosofia , 2008, DOI: 10.1590/S0100-512X2008000200006
Abstract: this paper develops various figures noted by carl schmitt as forms of anti-political subjectivity. whereas, from the german jurist's perspective, the operations which constitute a political way of being are those which produce and care for a representative form, the specificity of a anti-political subjectivity is shaped by those operations which erode or wear that political form down. the paper aims to show that the main feature of the antipolitical way of being is the delay, meaning the indefinite postponement of the decision as such. thus, under the various figures of the anti-politics that schmitt deals with, this operation appears on different manners: the liberal form of postponing is the endless discussion and the compromise; the romatic form is the aesthetization of the world.
Relaciones entre las abundancias del bacterioplancton y del fitoplancton en tres ecosistemas lénticos de los Andes Colombianos
Canosa,Amparo; Pinilla,Gabriel;
Revista de Biología Tropical , 2007,
Abstract: relations between bacterioplankton and phytoplankton abundance in three lentic ecosystems in the colombian andes. we analyzed relations among phytoplankton and total bacterioplankton fractions in three lentic ecosystems (neusa and prado dams, and fúquene lagoon) with different physicochemical characteristics, in the andes of colombia. samplings were made in three sites of each water body during three surveys. neusa dam (meso to oligotrophic) had the lowest bacterial concentration; prado dam (eutrophic) had a high bacterial and algal abundance, and the fúquene lagoon (mesotrophic) had lower concentrations of phytoplankton but a high relative concentration of bacteria, probably because of its particular conditions: high organic matter and low nutrient levels in the water. there was a negative correlation of total bacterioplankton with the phytoplankton (pearson=-0.4479, p=0.019, n=27) and a positive correlation between phytoplankton and heterotrophic bacteria (pearson=0.3866, p=0.062, n=24) and between total bacterioplankton and dbo5 (pearson=0.4088, p=0.034, n=27). apparently, total bacterioplankton and phytoplankton were not coupling, but cultivable bacteria and the phytoplankton had some degree of relationship. rev. biol. trop. 55 (1): 135-146. epub 2007 march. 31.
Los maestros de la terapia existen = Therapy's teachers are being
Canosa Domínguez, N
TOG : Revista de Terapia Ocupacional de la APGTO , 2007,
Abstract:
Relaciones entre las abundancias del bacterioplancton y del fitoplancton en tres ecosistemas lénticos de los Andes Colombianos
Amparo Canosa,Gabriel Pinilla
Revista de Biología Tropical , 2007,
Abstract: Analizamos las fracciones de fitoplancton y bacterioplancton en tres ecosistemas lénticos (los embalses de Neusa y Prado y la laguna de Fúquene), con características fisicoquímicas distintas, a fin de verificar el acoplamiento entre estas comunidades. Las muestras se tomaron en tres sitios de cada cuerpo de agua, en tres visitas de muestreo. El embalse de Neusa (meso a oligotrófico) mostró la menor concentración de bacterias; el embalse de Prado (eutrófico) tuvo una alta abundancia, tanto de algas como de bacterias. La laguna de Fúquene (oligo a mesotrófica) tuvo bajas concentraciones de fitoplancton, pero relativamente altas concentraciones de bacterias, debido a sus condiciones particulares de elevada concentración de materia orgánica y cantidades bajas de nutrientes en el agua. Se presentó una relación negativa entre el bacterioplancton total y el fitoplancton (Person= -0.4479, p=0.019, n= 27) y positiva entre el fitoplancton y las bacterias heterótrofas (Pearson= 0.3866, p=0.062, n= 24) y entre las bacterias y la materia orgánica (Pearson= 0.4088, p=0.034, n= 27). El bacterioplancton total y el fitoplancton no mostraron "acoplamiento", pero las bacterias cultivables y el fitoplancton tuvieron algún grado de interrelación. Relations between bacterioplankton and phytoplankton abundance in three lentic ecosystems in the Colombian Andes. We analyzed relations among phytoplankton and total bacterioplankton fractions in three lentic ecosystems (Neusa and Prado dams, and Fúquene lagoon) with different physicochemical characteristics, in the Andes of Colombia. Samplings were made in three sites of each water body during three surveys. Neusa dam (meso to oligotrophic) had the lowest bacterial concentration; Prado dam (eutrophic) had a high bacterial and algal abundance, and the Fúquene lagoon (mesotrophic) had lower concentrations of phytoplankton but a high relative concentration of bacteria, probably because of its particular conditions: high organic matter and low nutrient levels in the water. There was a negative correlation of total bacterioplankton with the phytoplankton (Pearson=-0.4479, p=0.019, n=27) and a positive correlation between phytoplankton and heterotrophic bacteria (Pearson=0.3866, p=0.062, n=24) and between total bacterioplankton and DBO5 (Pearson=0.4088, p=0.034, n=27). Apparently, total bacterioplankton and phytoplankton were not coupling, but cultivable bacteria and the phytoplankton had some degree of relationship. Rev. Biol. Trop. 55 (1): 135-146. Epub 2007 March. 31.
Development methodology for health information systems. A practical case of a Drinking Water Information System (SINAC) Metodología para el desarrollo de sistemas de información en sanidad. Aplicación del Sistema de Información Nacional de Aguas de Consumo (SINAC)
Javier Canosa Penaba
Revista de Salud Ambiental , 2003,
Abstract: For the proper development of an Environmental Health information system, the analytical method chosen should guarantee the right approach to avoid technological and personal barriers which may deviate the system from the very reason behind its creation: the protection of individuals from environmental risks. This paper introduces guidelines and supports a radical process-oriented approach as the guidance of the whole project. It goes on by describing 10 requirements to be met along the information system development process, and then describes the practical case of developing a Drinking Water Information System (SINAC, Sistema de Información Nacional de Aguas de Consumo) with the aim of serving as key tool to identify the safety and quality of drinking water and its suppliers across Spain, making it easier the collaboration between different regional Health competent authorities. Para el correcto desarrollo de un sistema de información en salud ambiental es fundamental una metodología de análisis que evite interferencias tecnológicas o condicionantes personales que le alejen del fin último para el que fue creado: la protección del individuo frente a los riesgos ambientales. El presente trabajo introduce unos principios orientadores y defiende la radical orientación a proceso como principio director de todo el desarrollo del proyecto. Describe 10 requisitos a cumplir a lo largo de todo el desarrollo del sistema de información y lo aplica al caso práctico de la construcción de SINAC (Sistema de Información Nacional de Aguas de Consumo) cuyo objetivo es servir de herramienta fundamental para identificar la calidad sanitaria de las aguas de consumo y de sus Abastecedores para el conjunto de Espa a, facilitando la cooperación entre las diferentes administraciones sanitarias.
Entanglement between distant qubits in cyclic XX chains
N. Canosa,R. Rossignoli
Physics , 2009, DOI: 10.1103/PhysRevA.75.032350
Abstract: We evaluate the exact concurrence between any two spins in a cyclic XX chain of n spins placed in a uniform transverse magnetic field, both at zero and finite temperature, by means of the Jordan-Wigner transformation plus a number parity projected statistics. It is shown that while at T=0 there is always entanglement between any two spins in a narrow field interval before the transition to the aligned state, at low but non-zero temperatures the entanglement remains non-zero for arbitrarily high fields, for any pair separation L, although its magnitude decreases exponentially with the field. It is also demonstrated that all associated limit temperatures approach a constant non-zero value in this limit, which decreases as 1/L^2 for L<
Low Density Wood Impregnation with Water-Repellent Organosilicic Compounds  [PDF]
Guadalupe Canosa, Paula V. Alfieri, Carlos A. Giudice
Journal of Materials Science and Chemical Engineering (MSCE) , 2018, DOI: 10.4236/msce.2018.61006
Abstract: Many protective treatments for low density wood are applied by impregnation to give waterrepellency and to control pathologies that usually have this substrate. The properties of Araucaria angustifolia, chemically modified by impregnation with methyltriethoxysilane, n-octyltriethoxysilane and mixtures of both in several ratios, were investigated to achieve mainly high dimensional stability, low capillary water absorption as well as satisfactory water vapor permeability. The aforementioned impregnants produce the wood chemical modification, involving the reaction of hydroxyl groups of the wood with the hydrolysis products of alcoxysilanes. It is concluded that the organosilicon polymers allow improving important characteristics of wood: 1) the non-occlusive coating keeps the water vapor permeability unaltered; 2) the alkoxysilane type defines the hydrophobicity and the continuity of coating formed on the pore wall and finally; 3) the polymeric structure formed after finishing solgel process incises both on the capillary water absorption and the dimensional stability. In addition, the studied treatments have the advantage of allowing that the water vapor, which permeates through the orga-nosilicon coating placed on cell wall, can exit by hydrophobic repulsion and thus, prevent faults appearance generated by the condensed water inside of wood.
Segregació social i marc institucional del scentres: una anàlisi internacional de les desigualtats educatives Social segregation and the institutional framework of the school: an Segregación social y marco institucional de los centros: un análisis
Gerard Ferrer Esteban,Miquel àngel Alegre Canosa
Temps d'Educació , 2009,
Abstract: L’objectiu del present article és l’anàlisi comparativa, en l’àmbit internacional, dels efectes dels factors de procés i de composició escolar en les desigualtats de resultats entre els estudiants. Aquesta anàlisi es du a terme mitjan ant models de regressió multinivell que permeten identificar factors que contribueixen a explicar la variabilitat del rendiment acadèmic dels estudiants i que, per tant, donen orientacions per assenyalar causes de les situacions de desigualtat en els sistemes educatius. L’anàlisi comprèn dades de 32 sistemes educatius de l’OCDE, 23 corresponents a unitats nacionals i nou a realitats subnacionals. La font principal d’informació utilitzada per a la construcció de les variables és la base de dades PISA2006. Els resultats de l’anàlisi corroboren l’efecte significatiu de la composició social dels centres. La significació d’aquests factors no presenten variacions importants quan es controlen les variables relatives al marc institucional i als processos pedagògics. D’altra banda, si bé els factors de procés escolar mostren un impacte comparativament menor sobre les puntuacions, aquells que més contribueixen a explicar les disparitats de resultats entre els centres escolars corresponen a pràctiques que segueixen, en certa mesura, principis de quasi-mercat. ___________________________________ L’objectif du présent article est l’analyse comparative, à niveau international, des effets des facteurs de processus et de composition scolaire dans les inégalités de résultats entre les étudiants. Cette analyse est menée à terme grace à des modèles de régression multi-niveaux qui permettent d’identifier les facteurs qui contribuent à expliquer la variabilité du rendement académique des étudiants et qui donnent, par conséquent, des orientations pour signaler les causes des situations d’inégalité dans les systèmes éducatifs. L’analyse comprend des données de trente-deux systèmes éducatifs de l’OCDE (23 sont unités nationales et 9, réalités sub-nationales). La source principale d’information utilisée pour la construction des variables est PISA 2006. Les résultats corroborent l’effet significatif de la composition sociale des centres. La signification de ces facteurs ne présente pas de variations importantes quand on contr le les variables relatives au cadre institutionnel et aux processus pédagogiques. D’autre part, si les facteurs de processus scolaire montrent un impact comparativement moindre sur les ponctuations, ceux qui contribuent le plus à expliquer les disparités de résultats entre les centres scolaires correspondent à des pratiques qui
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