352 research outputs found
The complex governance of the 2030 Agenda and the steering effects of implementing the SDGs in Brazil (2015-2022)
Agenda 2030 e os Objetivos de Desenvolvimento Sustentável (ODS) foram desenhadospara orientar politicamente paÃses de acordo com a realidade local. A implementaçãodesta agenda no Brasil oscilou entre a governança sem governo e a governança complexacom matiz social. A partir de abordagem qualitativo-interpretativa, discute-se a adesão doBrasil à Agenda 2030 em um processo policêntrico e de base social. Os resultados indicamo papel dos ODS em guiar discussões e ações locais, promovendo integração institucional,formação de uma rede inovadora e uma arquitetura de governança social de governoslocais e atores não estatais.La Agenda 2030 y los Objetivos de Desarrollo Sostenible (ODS) fueron concebidos paraorientar polÃticamente a los paÃses de acuerdo con sus intereses. La implementación de estaagenda en Brasil ha oscilado entre gobernabilidad sin gobierno y gobernabilidad complejacon dimensión social. Un enfoque cualitativo-interpretativo discute la adhesión de Brasil ala Agenda 2030 en un proceso policéntrico y de base social. Los resultados indican el papelde los ODS en orientar las acciones locales, promoviendo la integración institucional, laformación de una red innovadora y una arquitectura de gobernanza social de los gobiernoslocales y actores no estatales.The 2030 Agenda and the Sustainable Development Goals (SDGs) were conceived to politically guide countries according to their interests. The implementation of this agenda in Brazil has oscillated between governance without government and complex governance with a social dimension. Based on a qualitative-interpretative approach, Brazil’s adherence to the 2030 Agenda is discussed in a polycentric and socially based process. The results indicate the role of the SDGs in guiding local discussions and actions, promoting institutional integration, the formation of an innovative network and an architecture of social governance of local governments and non-state actors
Spin-orbit and solvent effects in the luminescent [re6q8(ncs)6]4-, q=s, se, te clusters: molecular sensors and molecular devices
Indexación: ScieloRelativistic time-dependent density functional (TDDFT) calculations including spin orbit interactions via the zero order regular approximation (ZORA) and solvent effects using the COSMO model were carried out on the [Re6Q8(NCS)6]4- , (Q = S, Se, Te) clusters. These calculations indicate that the lowest energy allowed electronic transitions are characterized by being of LMCT type. The calculated absorption maximum tends to shift to longer wavelengths as the face-capping chalcogenide ligand becomes heavier. Thus our calculations predict that the [Re6Te8(NCS)6]4- cluster might be also luminescent. Due to the unusual properties exhibited by these and other isoelectronic and isostructural hexarhenium (III) chalcogenide clusters, hexamolybdenum halide clusters and hexatungsten halide clusters, we propose here the design of nanodevices, such as, molecular sensors and molecular nanocells for molecular electronics.http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072010000100010&nrm=is
Calidad de vida relacionada con la salud en estudiantes universitarios de primer año
Objetive: To evaluate the health-related quality of life (HRQoL) of first-year university students at the University of Chile in 2015 Material and Method: Observational, transversal, and analytical study of first year students, 17 to 18 years of age, attending 14 Faculties, 2 Institutes, and 1 Bachelor Program of the University of Chile. Delivery of Kidscreen-52 test by email to 3,738 students, of which 1,277 replied (34.16%). The Winsteps program model and Rasch punctuation were used. Results: The dimensions Physical Well-being, State of Mood and Emotions, and Autonomy scored less than 42 Rasch points, and the other two dimensions – Psychological Well-being and Friends and Social Support - had significantly lower scores than those found in Chilean adolescents of a comparable age, in women, in students of lower socio-economical levels in municipal public schools with a Scholar Vulnerability Index, or those with a disability, health problem, or chronic illness. The differences are greater in Faculties with heavier academic demands. Discussion: This first study gives new information in an area seldom studied, which is important for students, academics, and authorities. It is suspected that similar results would be found in other university settings. Conclusions: HRQoL studies are feasible to apply in institutions of higher education, to benefit both students and educators. This study contributes to the diagnosis and evaluation of public policies on student support, and for teaching strategies. In the near future, HRQoL instruments could be applied with other students and other members of the university community, in combination with studies on risk factors.Objetivo: Calidad de Vida Relacionada con la Salud (CVRS) en estudiantes universitarios de primer año. Material y Método: Estudio observacional, transversal y analítico en estudiantes de 17 a 18 años de primer año de 14 Facultades, 2 Institutos y 1 Programa de Bachillerato. Se aplicó el test Kidscreen-52, enviado por correo electrónico a 3.738 estudiantes. Contestaron 1.277 (34,16%). Análisis con programa WINSTEPS y expresión con puntajes Rasch. Resultados: Las dimensiones Bienestar Físico, Estado de Ánimo y Emociones y Autonomía con menos de 42 puntos Rasch, y otras dos, Bienestar Psicológico, Amigos y Apoyo Social tuvieron puntajes significativamente menores a lo encontrado en adolescentes chilenos de edad comparable, en mujeres, escolares de establecimientos municipales de bajo nivel socioeconómico, con Índice de Vulnerabilidad Escolar (IVE) o con discapacidad o problema de salud o enfermedad crónica. Las diferencias son mayores en Facultades con más demanda académica. Este primer estudio revela información no conocida, trascendente para estudiantes, académicos y sus autoridades. Se sospecha que posiblemente ocurre en otras universidades. Conclusiones: Los estudios de Calidad de Vida estudiantil son factibles de aplicar en instituciones de educación superior en beneficio de educandos y educadores. Este estudio es un insumo para diagnóstico y evaluación de las políticas salud y apoyo estudiantil y aporta a la orientación de la docencia. En el futuro podrían aplicarse instrumentos de medición de la Calidad de Vida en estudiantes de otras edades y en otros estamentos universitarios con test validados en Chile, combinado con estudios de Factores de Riesgo
Amplified singlet oxygen generation in metallated-porphyrin doped conjugated polymer nanoparticles
We report on the mechanism and efficiencies of singlet oxygen O2(1Δg) generation of nanoparticles (NP) of the conjugated polymer (CP) poly(9,9-dioctylfluorene-alt-benzothiadiazole) (F8BT) doped with platinum octaethylporphyrin (PtOEP) suspended in water. A detailed study of the photophysics of these NP, using stationary and time-resolved absorption and emission techniques, indicates that O2(1Δg) is generated by the triplet excited state of F8BT and not by that of PtOEP, as previously observed for other porphyrin doped CP NP. O2(1Δg) quantum yields (ΦΔ) were measured by quantifying the characteristic phosphorescence of O2(1Δg) in the NIR region (∼1268 nm). It was found that incorporation of relatively small amounts of PtOEP to F8BT NP results in a significant increase of ΦΔ. NP containing 10% PtOEP (w/w) show a ΦΔ ∼ 0.24, which is 3 times larger than that observed for undoped F8BT NP, and larger than the reported for most water-soluble porphyrins. ΦΔ were also calculated from the oxidation rates (v0) of 3-[10-(2-carboxyethyl)anthracen-9-yl]propanoic acid (ADPA), a well-known chemical O2(1Δg) trap. Unexpectedly, this method was found to significantly overestimate the ΦΔ values due to the adsorption of ADPA on the surface of NP. The ADPA/NP adsorption process was characterized using a simple adsorption model yielding an (average) equilibrium constant of ∼8 × 103 M−1 and an (average) number of NP-binding sites of ∼14000. These results necessarily caution about the use of ADPA as a probe to evaluate ΦΔ in these NP systems. In addition, the interaction of F8BT NP with other anionic, cationic and zwitterionic dyes (dissolved in water) was studied. It was found that even at nano-molar concentrations all the dyes efficiently adsorb on the NP surface. This general and simple self-assembly strategy can be used to prepare superficially-dye-doped CP NP with potentially interesting technological applications.Fil: Spada, Ramiro MartÃn. Consejo Nacional de Investigaciones CientÃficas y Técnicas; Argentina. Universidad Nacional de RÃo Cuarto. Facultad de Ciencias Exactas FisicoquÃmicas y Naturales. Departamento de QuÃmica; ArgentinaFil: Macor, Lorena Paola. Universidad Nacional de RÃo Cuarto. Facultad de Ciencias Exactas FisicoquÃmicas y Naturales. Departamento de QuÃmica; Argentina. Consejo Nacional de Investigaciones CientÃficas y Técnicas; ArgentinaFil: Hernández, Laura. Universidad Nacional de RÃo Cuarto. Facultad de Ciencias Exactas FisicoquÃmicas y Naturales. Departamento de QuÃmica; Argentina. Consejo Nacional de Investigaciones CientÃficas y Técnicas; ArgentinaFil: Ponzio, Rodrigo Andrés. Consejo Nacional de Investigaciones CientÃficas y Técnicas; Argentina. Universidad Nacional de RÃo Cuarto. Facultad de Ciencias Exactas FisicoquÃmicas y Naturales. Departamento de QuÃmica; ArgentinaFil: Ibarra, Luis Exequiel. Consejo Nacional de Investigaciones CientÃficas y Técnicas; Argentina. Universidad Nacional de RÃo Cuarto. Facultad de Ciencias Exactas FisicoquÃmicas y Naturales. Departamento de BiologÃa Molecular; ArgentinaFil: Lorente, Carolina. Consejo Nacional de Investigaciones CientÃficas y Técnicas. Centro CientÃfico Tecnológico Conicet - La Plata. Instituto de Investigaciones FisicoquÃmicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones FisicoquÃmicas Teóricas y Aplicadas; ArgentinaFil: Chesta, Carlos Alberto. Consejo Nacional de Investigaciones CientÃficas y Técnicas; Argentina. Universidad Nacional de RÃo Cuarto. Facultad de Ciencias Exactas FisicoquÃmicas y Naturales. Departamento de QuÃmica; ArgentinaFil: Palacios, Rodrigo Emiliano. Universidad Nacional de RÃo Cuarto. Facultad de Ciencias Exactas FisicoquÃmicas y Naturales. Departamento de QuÃmica; Argentina. Consejo Nacional de Investigaciones CientÃficas y Técnicas; Argentin
Tratamiento impositivo de construcción y venta de inmuebles
En el presente trabajo se desarrolla el tratamiento impositivo de los principales tributos
nacionales en la construcción y venta de bienes inmuebles para las distintas situaciones que pueden
presentarse en la realidad económica y cómo afectan a los diferentes sujetos pasivos.Fil: Blanch, Rodrigo. Universidad Nacional de Cuyo. Facultad de Ciencias Económicas.Fil: López, Ramiro. Universidad Nacional de Cuyo. Facultad de Ciencias Económicas.Fil: San Esteban, Juan Manuel. Universidad Nacional de Cuyo. Facultad de Ciencias Económicas.Fil: Ullrich, Bernardo. Universidad Nacional de Cuyo. Facultad de Ciencias Económicas
El invento arte. Textos escogidos, 1998_2017
Se trata de una valiosa recolección de textos publicados en catálogos de exhibiciones y medios de prensa que permiten entender la transformación, vivencias y relaciones del arte boliviano en los últimos 17 años
Water quantity and quality under future climate and societal scenarios: a basin-wide approach applied to the Sorraia river, Portugal
Water resources are impacted by several stressors like over-population and over
consumption that compromises their availability. These stressors are expected to progressively
intensify due to climate change in most regions of the world, with direct impact on watersheds and
river systems. This study investigates the effect of different watershed pressure scenarios due to
climate change in the hydrological regime of the Sorraia River basin, Portugal. This catchment
includes one of the largest irrigated areas in the country, thus being strongly influenced by
anthropogenic activities, associated to hydrological (irrigation, flow regulation, damming) and
nutrient stressors. The SoilWater Assessment Tool has been used to simulate water flow and nutrient
dynamics in the watershed while considering inputs from two climate models and three societal
scenarios. Results have shown that the predicted rainfall reductions will have a significant impact
on river flow and nutrient concentrations when compared to baseline conditions. River flow will
expectably decrease by 75%, while nitrogen and phosphorus concentrations in river water will
expectably increase by 500% and 200%, respectively. These differences are more evident for storylines
that consider increasing pressures such as population growth and agricultural expansion marked
with unsustainable practices and increased reliance on technology. The results of this study indicate a
possible future outcome and provide effective guidelines for the formulation of water management
policies to counter the impacts of climate change and corresponding environmental pressures in the
Sorraia River basininfo:eu-repo/semantics/publishedVersio
Determinación de los factores de corrección por altimetrÃa para las condiciones atmosféricas del Valle de Aburrá, para el dimensionamiento de los sistemas metálicos individuales de evacuación de los productos de la combustión de los artefactos tipo B1
RESUMEN: El dimensionamiento de los sistemas de evacuación de los productos de la combustión de los artefactos tipo B.1 está afectado, entre otros factores, por las condiciones atmosféricas del sitio donde sean instalados. Aunque la NTC 3833 hace alguna alusión a las correcciones en los diseños por estos factores, no tiene en cuenta las condiciones locales de Colombia sino que adoptó lo establecido en normas extranjeras, especÃficamente la NFPA 54. Con este trabajo se pretende, mediante la realización de ensayos en dos calentadores de paso, los más comúnmente utilizados en el medio, encontrar factores de corrección que puedan ser aplicados a las tablas de las normas que puedan ser aplicados al área de cobertura del servicio de gas natural por red de las EE.PP.M. E.S.P., esto es, el Valle de Aburrá. Las tablas de diseño de la norma tienen en cuenta como parámetros básicos la potencia del artefacto, la altura, la longitud del conector y el diámetro de la chimenea, razón por la cual se seleccionaron dos artefactos de diferentes potencia, diferentes alturas de chimenea y dos longitudes de conector, mientras que el diámetro permaneció constante. La metodologÃa utilizada se fundamentó en la teorÃa de diseño de experimentos a partir de la cual se determinó el número de réplicas para cada ensayo. Los resultados arrojados permiten concluir que las dimensiones de la chimenea pueden ser menores a las indicadas por la tablas cuando se trabajan en sitios para condiciones atmosféricas semejantes al Valle de Aburrá, para artefactos con potencia menores de 30.7 kW cuyo sistema de combustión son quemadores atmosféricos de aire inducido
Evaluation of the trophic status in a Mediterranean reservoir under climate change: an integrated modelling approach
This study describes an integrated modelling approach to better understand the trophic status of the
Montargil reservoir (southern Portugal) under climate change scenarios. The SWAT and CE-QUAL-W2
models were applied to the basin and reservoir, respectively, for simulating water and nutrient
dynamics while considering one climatic scenario and two decadal timelines (2025–2034 and
2055–2064). Model simulations showed that the dissolved oxygen concentration in the reservoir’s
hypolimnion is expected to decrease by 60% in both decadal timelines, while the chlorophyll-a
concentration in the reservoir’s epiliminion is expected to increase by 25%. The total phosphorus
concentration (TP) is predicted to increase in the water column surface by 63% and in the hypolimion
by 90% during the 2030 timeline. These results are even more severe during the 2060 timeline. Under
this climate change scenario, the reservoir showed a eutrophic state during 70–80% of both
timelines. Even considering measures that involve decreases in 30 to 35% of water use, the eutrophic
state is not expected to improveinfo:eu-repo/semantics/publishedVersio
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