La situación de la enseñanza de la geografía en el mundo

Fil: Ostuni, Josefina

Una nueva propuesta de interactuar sobre educación geográfica frente a lo efímero y lo permanente

Fil: Ostuni, Josefina. Universidad Nacional de CuyoFil: Rodríguez de González, Mónica. Universidad Nacional de Cuy

A Preliminary Review on the Diffusion of Linked Data in the Enterprise

Artigo apresentado no I Workshop de Informação, Dados e Tecnologia, realizado entre nos dias 04 e 06 de setembro de 2017, na cidade de Florianópolis (SC), no Auditório do Espaço Físico Integrado (EFI) da Universidade Federal de Santa Catarina (UFSC).As empresas necessitam estar atentas as mudanças no cenário mundial, para que possam responder rapidamente as mudanças de mercado. Para isso, a Web contribuiu possibilitando dinamismo, impactando com isso em um aumento significativo no volume de dados, que podem ser explorados, com o intuito de se obter benefícios. O Linked Enterprise Data é apresentado como um formato de dados que pode auxiliar os gestores na tomada de decisão, oportunizando explorar dados internos e externos a empresa, porém este conceito não é muito explorado no âmbito empresarial. Por este motivo o presente estudo objetiva-se em discutir os fatores que impedem a difusão de Linked Data neste contexto. Deste modo, observa-se que a cultura organizacional e alinhamento estratégico, entre outros, são alguns dos fatores encontrado para que não ocorra a difusão do Linked Enterprise Data. O que permite concluir que Linked Enterprise Data está começando a chamar atenção das empresas, mas se faz necessário mais trabalhos que abordem as reais contribuições ao meio empresarial, para difundir o Linked Data neste contexto.Companies need to be aware of changes in the global landscape, so they can respond quickly to market changes. For this purpose, the Web has contributed to the dynamism, thus impacting on a significant increase in the volume of data that can be exploited in order to obtain benefits. Linked Enterprise Data is presented as a concept that can help managers in decision making, allowing the exploration of internal and external data to the enterprise, but this concept is not much explored in the business scope. For this reason, the present study aims at discussing the factors that prevent the diffusion of Linked Data in this context. In this way, it is observed that the organizational culture and strategic alignment, among others, are some of the factors found so that the dissemination of Linked Enterprise Data does not occur. This allows us to conclude that Linked Enterprise Data is beginning to attract attention from companies, but more work is needed to address the real contributions to the business environment, to disseminate Linked Data in this context

Presentación del dossier: Ciudades neoliberales: políticas urbanas, diseño y justicia social

Las “ciudades neoliberales” predominan en la escena mundial y se caracterizan porque la mayoría de sus componentes son objeto de negocio y especulación, en el marco de una mercantilización expandida, que produce efectos globales de “urbanización por desposesión” (Harvey 2000). En este contexto, las actuales políticas urbanas -en particular aquellas referidas al espacio público y habitacional- se despliegan en un escenario donde coexisten dificultades crecientes en amplios sectores sociales para concretar el acceso a la “centralidad” urbana (Lefevbre, 1972), a la vez que se experimentan globalmente los efectos sostenidos de la dinámica del capital inmobiliario, que ha modificado radicalmente la territorialidad urbana.Fil: Rodríguez, Carla. Universidad de Buenos Aires. Facultad de Ciencias Sociales. Instituto de Investigaciones "Gino Germani"; ArgentinaFil: Devalle, Veronica Estela. Universidad de Buenos Aires. Facultad de Arquitectura y Urbanismo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Ostuni, Fernando Martín. Universidad de Buenos Aires. Facultad de Ciencias Sociales. Instituto de Investigaciones "Gino Germani"; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

A self-limiting bank erosion mechanism? Inferring temporal variations in bank form and skin drag from high resolution topographic data

Fluvial bank erosion rates are often quantified by assuming that the erosion rate is a function of the excess (above a critical threshold) boundary shear stress applied by the flow. Research has shown that the form roughness induced by natural topographic bank features, such as slumps, spurs and embayments, is the dominant component of the spatially-averaged total shear stress, meaning that form roughness provides an important control on bank erosion rates. However, measuring the relative components of the total shear stress for a natural system is not straightforward. In this paper we employ the method of Kean and Smith (2006a,b) to partition the form and skin drag components of river bank roughness using a time series (2005-2011) of high-resolution topographic surveys of an eroding bank of the Cecina River in central Italy. This method approximates the form drag component of the roughness along a longitudinal bank profile as a series of user defined Gaussian curves. The extracted metrics are used in conjunction with an estimate of the outer region flow velocity to partition the form and skin drag components of the total boundary shear stress according to the Kean and Smith analytical solution. The relative magnitude of the form and skin shear stress at each survey date is analysed alongside DEMs of difference to reveal that intense episodes of erosion are followed by periods of quiescence. We show that this is due to the protection offered by increased form drag roughness following erosion. We conceptualise the dynamic feedbacks that exist between river discharge, bank erosion processes and bank form roughness, into a simple model of the self-limiting nature of river bank erosio

Iterative Application of the aiNET Algorithm in the Construction of a Radial Basis Function Neural Network

This paper presents some of the procedures adopted in the construction of a Radial Basis Function Neural Network by iteratively applying the aiNET, an Artificial Immune Systems Algorithm. These procedures have shown to be effective in terms of i) the free determination of centroids inspired by an immune heuristics; and ii) the achievement of appropriate minimal square errors after a number of iterations. Experimental and empirical results are compared aiming at confirming (or not) some hypotheses

Interaction of Cisplatin with a CCHC Zinc Finger Motif

The interaction between cisplatin and an 18-residue CCHC zinc finger motif derived from a retroviral nucleocapsid protein (PyrZf18) has been studied using UV–visible, CD and 1H NMR spectroscopies and ESI-MS spectrometry. Cisplatin irreversibly blocks the cysteine zinc binding groups in the free peptide and is able to slowly eject zinc from the zinc–peptide complex. The observed end product of the reaction with cisplatin is a complex in which only one ammonia molecule is coordinated to platinum. After an initial binding with two cysteine residues and the formation of the (PyrZf18)– platinum–(NH3)2 complex, a release of one ammonia molecule occurs because of trans-labilization, and the third cysteine is coordinated, leading to a mixture of isomers and/or conformers of the (PyrZf18)–platinum–NH3 complex. The results are discussed with respect to the potential antiretroviral activity of platinum(II) compounds and to the possible interaction of cisplatin with the cellular nucleic acid binding proteins

La expresión gráfica en la enseñanza y la investigación

Fil: Ostuni, Josefina.Fil: Furlani de Civit, María Estela.Fil: Gutierrez de Manchón, María Josefina

Reversible adsorption on a random site surface

We examine the reversible adsorption of hard spheres on a random site surface in which the adsorption sites are uniformly and randomly distributed on a plane. Each site can be occupied by one solute provided that the nearest occupied site is at least one diameter away. We use a numerical method to obtain the adsorption isotherm, i.e. the number of adsorbed particles as a function of the bulk activity. The maximum coverage is obtained in the limit of infinite activity and is known exactly in the limits of low and high site density. An approximate theory for the adsorption isotherms, valid at low site density, is developed by using a cluster expansion of the grand canonical partition function. This requires as input the number of clusters of adsorption site of a given size. The theory is accurate for the entire range of activity as long as the site density is less than about 0.3 sites per particle area. We also discuss a connection between this model and the vertex cover problem.Comment: 16 pages, 10 figure