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Search Results: 1 - 10 of 3097 matches for " Mercedes; Davó Blanes "
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Valoración de los objetivos de desarrollo del milenio mediante la revisión de la literatura científica en 2008
Gil-González,Diana; Carrasco-Porti?o,Mercedes; Davó Blanes,Ma Carmen; Donat Castelló,Lucas; Franco-Giraldo,álvaro; Ortiz Moncada,Rocio; Palma Solís,Marco; Ruiz-Cantero,Ma Teresa; Vives-Cases,Carmen; Stein,Airton; Hernández Aguado,Ildefonso; álvarez-Dardet Díaz,Carlos;
Revista Espa?ola de Salud Pública , 2008, DOI: 10.1590/S1135-57272008000500002
Abstract: the millennium development goals (mdgs) are now at the midterm of their target period, as 2015 is the date scheduled by the united nations organisation (un) for their attainment. the purpose of this article is to review the current situation of the mdgs worldwide and to analyse the barriers which are preventing them from being attained in each of the mdg areas, as well as to assess a number of the indicators evaluated. in order to do so, a review has been made of the scientific literature published on the mdgs in the principal health sciences and social sciences databases, as well as the most significant reports on the issue drawn up by the united nations. the scientific studies on the 8 mdgs and their 18 targets make it possible to undertake a critical analysis of the situation in which each of these goals are found at the present time, identifying the determinants that are preventing the attainment of the goals and the actions considered necessary in order to achieve progress. although there have been improvements in some of the goals on a world level, the research carried out to date reveals barriers to the attainment of the mdgs, as well as the insufficient weight of the developing countries in the economic and political decision-making processes, together with the incoherence between the economic policies and the social and health policies. furthermore, sub-saharan africa constitutes the most disadvantaged region, which means that it will not attain the majority of the mdgs. spain and the developed countries, in addition to contributing resources, can also contribute to the mdgs by means of the identification and eradication of the barriers preventing attainment. this involves promoting international economic relations under conditions of social justice, by supporting a greater decision-making power for developing countries and denouncing actions that increase social inequalities and the impoverishment of the population.
Bolivia: las áreas metropolitanas en perspectiva de desarrollo regional
Blanes,José;
EURE (Santiago) , 2006, DOI: 10.4067/S0250-71612006000100002
Abstract: close to the creation of departmental autonomies and the celebration of an asamblea constituyente in june of 2006, metropolitan areas become the main cores of economic development in bolivia. this paper analyzes the rapid way in which bolivia has moved from a rural country to an urban one, around a central axis that will gather almost three quarters of the total population (mainly of indigenous origin) within a few decades, as well as the demands for services and labor market. from the south, where the main mining and gas settlements are located, another axis competes with this one, as well as another one from the north, but with less potential. the comparative analysis remarks the different perspectives of each zone, the differentiated nature of urban and regional processes and the possible courses and rhythms of the rural-urban change
Nós, os Ciganos e os Outros, Etnicidade e Exclus o Social
Ruy Blanes
Análise Social , 2007,
Abstract:
Embedded Distributed Vision System for Humanoid Soccer Robot
Francisco Blanes
Journal of Physical Agents , 2011,
Abstract: Computer vision is one of the most challenging applications in sensor systems since the signal is complex from spatial and logical point of view. Due to these characteristics vision applications require high computing resources, which makes them especially difficult to use in embedded systems, like mobile robots with reduced amount memory and computing power. In this work a distributed architecture for humanoid visual control is presented using specific nodes for vision processing cooperating with the main CPU to coordinate the movements of the exploring behaviours. This architecture provides additional computing resources in a reduced area, without disturbing tasks related with low level control (mainly kinematics) with the ones involving vision processing algorithms. The information is exchanged allowing to linking control loops between both nodes.
Bolivia: las áreas metropolitanas en perspectiva de desarrollo regional
José Blanes
EURE (Santiago) , 2006,
Abstract: Cuando se avecina la creación de autonomías departamentales y la celebración de una Asamblea Constituyente en julio de 2006, las áreas metropolitanas se constituyen en los núcleos centrales del desarrollo económico. El artículo analiza el curso rápido en que Bolivia ha pasado de ser un país rural a otro urbano, en torno a un eje central que reunirá dentro de unas décadas a casi tres tercios de la población total -la gran mayoría de población indígena-, así como las demandas por servicios y mercado de trabajo. Con este eje compite otro por el Sur, sede de los principales asientos mineros y gasíferos, y otro de menos potencial por el Norte. El análisis comparativo resalta las diferentes perspectivas de cada una de las tres principales zonas y la naturaleza diferenciada de los procesos urbanos y regionales, así como las direcciones posibles y los ritmos del cambio urbano-rural Close to the creation of departmental autonomies and the celebration of an Asamblea Constituyente in June of 2006, metropolitan areas become the main cores of economic development in Bolivia. This paper analyzes the rapid way in which Bolivia has moved from a rural country to an urban one, around a central axis that will gather almost three quarters of the total population (mainly of indigenous origin) within a few decades, as well as the demands for services and labor market. From the South, where the main mining and gas settlements are located, another axis competes with this one, as well as another one from the North, but with less potential. The comparative analysis remarks the different perspectives of each zone, the differentiated nature of urban and regional processes and the possible courses and rhythms of the rural-urban change
High order structure preserving explicit methods for solving linear-quadratic optimal control problems and differential games
Sergio Blanes
Mathematics , 2013,
Abstract: We present high order explicit geometric integrators to solve linear-quadratic optimal control problems and $N$-player differential games. These problems are described by a system coupled non-linear differential equations with boundary conditions. We propose first to integrate backward in time the non-autonomous matrix Riccati differential equations and next to integrate forward in time the coupled system of equations for the Riccati and the state vector. This can be achieved by using appropriate splitting methods, which we show they preserve most qualitative properties of the exact solution. Since the coupled system of equations is usually explicitly time dependent, a preliminary analysis has to be considered. We consider the time as two new coordinates, and this allows us to integrate the whole system forward in time using splitting methods while preserving the most relevant qualitative structure of the exact solution. If the system is a perturbation of an exactly solvable problem, the performance of the splitting methods considerably improves. Some numerical examples are also considered which show the performance of the proposed methods.
The Odd Meanderings of the IMF Across Cosmic Time
Romeel Davé
Physics , 2010,
Abstract: It is difficult to reconcile the observed evolution of the star formation rate versus stellar mass (SFR-M*) relation with expectations from current hierarchical galaxy formation models. The observed SFR-M* relation shows a rapid rise in SFR(M*) from z=0-2, and then a surprisingly lack of amplitude evolution out to z~6+. Hierarchical models of galaxy formation match this trend qualitatively but not quantitatively, with a maximum discrepancy of ~x3 in SFR at z~2. One explanation, albeit radical, is that the IMF becomes modestly weighted towards massive stars out to z~2, and then evolves back towards its present-day form by z~4 or so. We observe that this redshift trend mimics that of the cosmic fraction of obscured star formation, perhaps hinting at a physical connection. Such IMF evolution would concurrently go towards explaining persistent discrepancies between integrated measures of star formation and present-day stellar mass or cosmic colors.
Missing Halo Baryons and Galactic Outflows
Romeel Davé
Physics , 2009,
Abstract: We present predictions for galactic halo baryon fractions from cosmological hydrodynamic simulations with a well-constrained model for galactic outflows. Without outflows, halos contain roughly the cosmic fraction of baryons, slightly lowered at high masses owing to pressure support from hot gas. The star formation efficiency is large and increases monotonically to low masses, in disagreement with data. With outflows, the baryon fraction is increasingly suppressed in halos to lower masses. A Milky Way-sized halo at z=0 has about 60% of the cosmic fraction of baryons, so "missing" halo baryons have largely been evacuated, rather than existing in some hidden form. Large halos (>10^13 Mo) contain 85% of their cosmic share of baryons, which explains the mild missing baryon problem seen in clusters. By comparing results at z=3 and z=0, we show that most of the baryon removal occurs at early epochs in larger halos, while smaller halos lose baryons more recently. Star formation efficiency is maximized in halos of ~10^13 Mo, dropping significantly to lower masses, which helps reconcile the sub-L* slope of the observed stellar and halo mass functions. These trends are predominantly driven by differential wind recycling, namely, that wind material takes longer to return to low-mass galaxies than high-mass galaxies. The hot gas content of halos is mostly unaffected by outflows, showing that outflows tend to blow holes and escape rather than deposit their energy into halo gas.
The Evolution of the Lyman Alpha Forest From Redshift 3 to 0
Romeel Davé
Physics , 2001,
Abstract: I review results obtained from studies of the high-redshift Lyman alpha forest, and present new results from HST/STIS spectra of low-redshift quasars in comparison with cosmological hydrodynamic simulations. The evolution of the Lyman alpha forest from redshift 3 to 0 is well-described by current structure formation models, in which Ly-a forest absorbing gas at all redshifts traces moderate-overdensity large-scale structures. I describe some of the insights provided by hydrodynamic simulations into the observed statistical trends of Ly-a absorbers and the physical state of the absorbing gas.
Rapidly Star-forming Galaxies At High Redshifts
Romeel Davé
Physics , 2011, DOI: 10.1051/eas/1152005
Abstract: Herschel has opened new windows into studying the evolution of rapidly star-forming galaxies out to high redshifts. Today's massive starbursts are characterized by star formation rates (SFRs) of 100+ Mo/yr and display a chaotic morphology and nucleated star formation indicative of a major merger. At z~2, galaxies of similar mass and SFR are characterized by ordered rotation and distributed star formation. The emerging cold accretion paradigm provides an intuitive understanding for such differences. In it, halo accretion rates govern the supply of gas into star-forming regions, modulated by strong outflows. The high accretion rates at high-z drive more rapid star formation, while also making disks thicker and clumpier; the clumps are expected to be short-lived in the presence of strong galactic outflows as observed. Hence equivalently rapid star-formers at high redshift are not analogous to local merger-driven starbursts, but rather to local disks with highly enhanced accretion rates.
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