Lisboa 1998. Un punto de inflexión en la orientación de las grandes exposiciones internacionales: del optimismo desarrollista a la reflexión sobre los problemas del planeta

Las grandes exposiciones internacionales han constituido hasta aquí exponentes privilegiados de los avances tecnológicos, contribuyendo de ese modo a transmitir optimistas visiones de 'futuros de progreso'. Con la Expo '98 de Lisboa se ha comenzado a poner en práctica una nueva concepción del papel de estas exposiciones, mucho más útil, pensamos, desde el punto de vista de la educación de la ciudadaní

A UTILIZAÇÃO DO MIMES – MULTI-SCALE INTEGRATED MODEL OF THE EARTH SYTEMS ECOLOGICAL SERVICES COMO FERRAMENTA IMPORTANTE PARA A VALORAÇÃO DE SERVIÇOS ECOSSISTÊMICOS.

O MIMES – Multi-scale Integrated Model of the Earth Sytems Ecological Services é o primeiro modelo global a relacionar a dinâmica entre a tecnologia, produção e bem-estar econômico e os bens e serviços ecossistêmicos do sistema dinâmico da Terra, de forma espacializada. É um “meta-modelo” que representa uma síntese de uma simplificação dos diversos modelos globais dinâmicos existentes nas ciências naturais e sociais em um nível intermediário de complexidade. O objetivo do MIMES é simular o sistema integrado da Terra e avaliar a dinâmica e os valores dos serviços dos ecossistemas. O presente estudo de caso é a modelagem da dinâmica do uso e cobertura das terras na Bacia-Hidrográfica dos Rio Mogi-Guaçú e Pardo em São Paulo. Ele foca a restauração dos serviços ecossistêmicos do controle da erosão. São descritos os estudos da Bacia Hidrográfica e analisado a dinâmica do uso e cobertura das terras, focado nas suas principais forças tais como a legislação ambiental do país e as mudanças nos preços relativos favorecendo uma forte expansão do cultivo da cana-de-açúcar na região. Esta dinâmica tem importante impacto nas taxas de erosão cujas medidas metodológicas são apresentadas com os resultados obtidos. Para simular esta dinâmica foi desenvolvido um modelo seguindo a metodologia do MIMES. O algoritmo desenvolvido modela as mudanças do uso e cobertura das terras baseado principalmente na força das leis ambientais e movimentos dos preços medindo os impactos do processo de erosão. Espera-se que esta dinâmica contribua para a restauração dos serviços ecossistêmicos da Bacia Hidrográfica. -------------------------------------------------------------------The MIMES – Multi-scale Integrated Model of the Earth Sytems Ecological Services is the first global model it relate to dynamic between the technology, output and economic welfare and the property and ecosystem service of the dynamic system of the Land, of form specialited. It is a "goal-model" that represents a synthesis of a simplification of the diverse existing dynamic global models in the social and natural sciences in an intermediate level of complexity. The MIMES objective is going to simulate the system integrated of the Land and evaluate to dynamic and the values of the service of the ecosystems. This paper aims at modeling the land use and land cover dynamics in a watershed in São Paulo State, Brazil. It focuses on the potential restoration of the ecosystem service erosion control. The studied watershed is described and its land use and land cover dynamics analyzed, focusing on its main driving forces such as the legislation enforcement and crop relative price changes favoring a very strong expansion of sugar-cane in the region. This dynamics has important impacts on erosion rates whose measurement methodology is presented along with the results obtained. To simulate this dynamics a model was built following MIMES. The algorithms developed deal with a process of forest recovery, modeling land use/land cover changes pushed mainly by legislation enforcement and price movements and measuring their impacts on the erosion process. It is expected that this dynamics would lead to a restoration of the ecosystem service erosion control.Modelo de mudanças do uso das terras, valoração dos serviços ecossistêmicos, controle da erosão de solos, modelo dinâmico integrado multi-escala, land use change model, ecosystem services valuation, soil erosion control, multi-scale integrated dynamic modeling, Environmental Economics and Policy,

Parabolic stable surfaces with constant mean curvature

We prove that if u is a bounded smooth function in the kernel of a nonnegative Schrodinger operator $-L=-(\Delta +q)$ on a parabolic Riemannian manifold M, then u is either identically zero or it has no zeros on M, and the linear space of such functions is 1-dimensional. We obtain consequences for orientable, complete stable surfaces with constant mean curvature $H\in\mathbb{R}$ in homogeneous spaces $\mathbb{E}(\kappa,\tau)$ with four dimensional isometry group. For instance, if M is an orientable, parabolic, complete immersed surface with constant mean curvature H in $\mathbb{H}^2\times\mathbb{R}$, then $|H|\leq 1/2$ and if equality holds, then M is either an entire graph or a vertical horocylinder.Comment: 15 pages, 1 figure. Minor changes have been incorporated (exchange finite capacity by parabolicity, and simplify the proof of Theorem 1)

A Lagrangian scheme for the solution of nonlinear diffusion equations using moving simplex meshes

A Lagrangian numerical scheme for solving nonlinear degenerate Fokker{Planck equations in space dimensions d>2 is presented. It applies to a large class of nonlinear diffusion equations, whose dynamics are driven by internal energies and given external potentials, e.g. the porous medium equation and the fast diffusion equation. The key ingredient in our approach is the gradient ow structure of the dynamics. For discretization of the Lagrangian map, we use a finite subspace of linear maps in space and a variational form of the implicit Euler method in time. Thanks to that time discretisation, the fully discrete solution inherits energy estimates from the original gradient ow, and these lead to weak compactness of the trajectories in the continuous limit. Consistency is analyzed in the planar situation, d = 2. A variety of numerical experiments for the porous medium equation indicates that the scheme is well-adapted to track the growth of the solution's support

Strategies for Providing Quality Patient Care in the Healthcare Industry

In the United States, there is a lack of quality healthcare, which can negatively impact patient care, so it is important for healthcare leaders to effectively utilize their resources to enhance quality patient care. Grounded in the resource advantage and total quality management theories, the purpose of this qualitative single case study was to explore strategies healthcare leaders at a large healthcare organization used to deliver quality patient care. The participants included 3 senior executive leaders at a healthcare organization in the Eastern United States. Data were collected through semistructured interviews, an analysis of organizational documents, and the client’s Baldrige Excellence Framework application. Through thematic analysis, the following three themes emerged: patient-centeredness, employee focus, and innovation. A key recommendation includes putting more emphasis on data analysis to help leaders determine which data is impactful for patients’ wellbeing. The potential for social change includes leaders of health organizations implementing strategies that ensure quality patient care, resulting in patients living longer and better lives

An evaluation of the exposure in nadir observation of the JEM-EUSO mission

We evaluate the exposure during nadir observations with JEM-EUSO, the Extreme Universe Space Observatory,on-board the Japanese Experiment Module of the International Space Station. Designed as a mission to explore the extreme energy Universe from space, JEM-EUSO will monitor the Earth's nighttime atmosphere to record the ultraviolet light from tracks generated by extensive air showers initiated by ultra-high energy cosmic rays. In the present work, we discuss the particularities of space-based observation and we compute the annual exposure in nadir observation. The results are based on studies of the expected trigger aperture and observational duty cycle, as well as, on the investigations of the effects of clouds and different types of background light. We show that the annual exposure is about one order of magnitude higher than those of the presently operating ground-based observatories.Fil: Adams, J. H.. University of Alabama in Huntsville; Estados UnidosFil: Ahmad, S.. Universite Paris Sud; FranciaFil: Albert, J. N..Fil: Allard, D.. Universite Paris Diderot - Paris 7; FranciaFil: Ambrosio, M.. Istituto Nazionale di Fisica Nucleare; ItaliaFil: Anchordoqui, L.. Medical College Of Wisconsin; Estados UnidosFil: Anzalone, A.. INAF; ItaliaFil: Arai, Y.. High Energy Accelerator Research Organization (KEK); JapónFil: Aramo, C..Fil: Asano, K.. Interactive Research Center of Science, Tokyo Institute of Technology; JapónFil: Ave, M.. Universidad de Santiago de Compostela; EspañaFil: Barrillon, P.. Universite de Paris; FranciaFil: Batsch, T.. National Centre for Nuclear Research; PoloniaFil: Bayer, J.. University of Tubingen; AlemaniaFil: Belenguer, T.. j Instituto Nacional de Técnica Aeroespacial (INTA); EspañaFil: Bellotti, R.. Universita’ degli Studi di Bari Aldo Moro and INFN; ItaliaFil: Berlind, A. A.. Vanderbilt University; Estados UnidosFil: Bertaina, M.. Universita di Torino; ItaliaFil: Biermann, P. L.. Karlsruhe Institute of Technology (KIT); AlemaniaFil: Biktemerova,. Joint Institute for Nuclear Research; RusiaFil: Blaksley, C.. Universite de la Sorbona Nouvelle; FranciaFil: Blecki, J.. Space Research Centre of the Polish Academy of Sciences (CBK); PoloniaFil: Blin-Bondil, S.. Universite de Paris; FranciaFil: Blumer, J.. Karlsruhe Institute of Technology (KIT),; AlemaniaFil: Bobik, P.. Institute of Experimental Physics; EslovaquiaFil: Bogomilov, M.. St. Kliment Ohridski University of Sofia; BulgariaFil: Bonamente, M.. University of Alabama in Huntsville; Estados UnidosFil: Briz, S.. Universidad Carlos III de Madrid,; EspañaFil: Supanitsky, Alberto Daniel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentin

Highlights from the Pierre Auger Observatory

The Pierre Auger Observatory is the world's largest cosmic ray observatory. Our current exposure reaches nearly 40,000 km$^2$ str and provides us with an unprecedented quality data set. The performance and stability of the detectors and their enhancements are described. Data analyses have led to a number of major breakthroughs. Among these we discuss the energy spectrum and the searches for large-scale anisotropies. We present analyses of our X$_{max}$ data and show how it can be interpreted in terms of mass composition. We also describe some new analyses that extract mass sensitive parameters from the 100% duty cycle SD data. A coherent interpretation of all these recent results opens new directions. The consequences regarding the cosmic ray composition and the properties of UHECR sources are briefly discussed.Comment: 9 pages, 12 figures, talk given at the 33rd International Cosmic Ray Conference, Rio de Janeiro 201

Measurement of the cosmic ray spectrum above 4×10184{\times}10^{18} eV using inclined events detected with the Pierre Auger Observatory

A measurement of the cosmic-ray spectrum for energies exceeding $4{\times}10^{18}$ eV is presented, which is based on the analysis of showers with zenith angles greater than $60^{\circ}$ detected with the Pierre Auger Observatory between 1 January 2004 and 31 December 2013. The measured spectrum confirms a flux suppression at the highest energies. Above $5.3{\times}10^{18}$ eV, the "ankle", the flux can be described by a power law $E^{-\gamma}$ with index $\gamma=2.70 \pm 0.02 \,\text{(stat)} \pm 0.1\,\text{(sys)}$ followed by a smooth suppression region. For the energy ($E_\text{s}$) at which the spectral flux has fallen to one-half of its extrapolated value in the absence of suppression, we find $E_\text{s}=(5.12\pm0.25\,\text{(stat)}^{+1.0}_{-1.2}\,\text{(sys)}){\times}10^{19}$ eV.Comment: Replaced with published version. Added journal reference and DO

Ultrahigh-energy neutrino follow-up of Gravitational Wave events GW150914 and GW151226 with the Pierre Auger Observatory

On September 14, 2015 the Advanced LIGO detectors observed their first gravitational-wave (GW) transient GW150914. This was followed by a second GW event observed on December 26, 2015. Both events were inferred to have arisen from the merger of black holes in binary systems. Such a system may emit neutrinos if there are magnetic fields and disk debris remaining from the formation of the two black holes. With the surface detector array of the Pierre Auger Observatory we can search for neutrinos with energy above 100 PeV from point-like sources across the sky with equatorial declination from about -65 deg. to +60 deg., and in particular from a fraction of the 90% confidence-level (CL) inferred positions in the sky of GW150914 and GW151226. A targeted search for highly-inclined extensive air showers, produced either by interactions of downward-going neutrinos of all flavors in the atmosphere or by the decays of tau leptons originating from tau-neutrino interactions in the Earth's crust (Earth-skimming neutrinos), yielded no candidates in the Auger data collected within $\pm 500$ s around or 1 day after the coordinated universal time (UTC) of GW150914 and GW151226, as well as in the same search periods relative to the UTC time of the GW candidate event LVT151012. From the non-observation we constrain the amount of energy radiated in ultrahigh-energy neutrinos from such remarkable events.Comment: Published version. Added journal reference and DOI. Added Report Numbe