Cordoba, Argentina

National University of Cordoba

www.unc.edu.ar
Cordoba, Argentina

The National University of Córdoba , founded in 1613, is the oldest university in Argentina, the fourth oldest in South America and the sixth oldest in Latin America. It is located in Córdoba, the capital of Córdoba Province. Since the early 20th century it has been the second largest university in the country in terms of the number of students, faculty, and academic programs. As the location of the first university founded in the land that is now Argentina, Córdoba has earned the nickname La Docta . Wikipedia.


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Grant
Agency: European Commission | Branch: FP7 | Program: CP-FP-SICA | Phase: ENV.2011.3.1.1-1 | Award Amount: 4.58M | Year: 2011

In order to be able to maximize the benefits from reuse and recycling technologies projects a larger systemic analysis of the environment is needed, an enlargement of the traditional narrow planning and management approaches, and a growing sensitivity to decision-making associated with multi-objective, multi-purpose actions and multi uses parameters. However, the problem is not centered on the lack of treatment techniques and technologies, but rather on how such schemes may become more efficient and implementable. COROADO will both develop new and adapt existing concepts and operational frameworks and produce a web-based toolbox for reuse and recycling technologies in the context of integrated water resources management, taking into account long-lasting changes, and at the same time addressing environmental and ecosystem integrity. Climate change and water scarcity in relation with the pertinent technologies will also be addressed. Thus, COROADO would focus on: a) Developing tools for analyzing reuse and recycling technologies and trade-offs b) Addressing non-linearity and resilience c) Promoting and organizing active participation of stakeholders and capacity building efforts. The web based Communication, Capacity Building and Research Tool will present a richer menu of options from assessment and planning to implementation, monitoring and evaluation The system will be designed so as to present critical information in an interesting and efficient manner, offering an engaging learning experience. The project will include deliberate efforts to ensure knowledge and capacity exchanges between the project sites, and among Latin American, European and other parts of the world facing similar conditions, by introducing exchanges based on research in the four study sites and generated outcomes with a strong emphasis in dissemination. The effort may develop an understanding of needed transitions of governance and policy systems in order to mainstream such water reuse and recycling technologies implementation, providing a continuous and appropriate set of guidelines, and manuals so that policy relevant standards may be applied by end users and policy makers and after the completion of COROADO, without any further support.


Patent
National University of Cordoba and University of the Frontier | Date: 2012-04-19

A piece of scientific/technological equipment is presented for the generation of a convergent photon beam for radiotherapy or other applications. This equipment consists of adequately modifying the trajectory of an electron beam from a linear accelerator (LINAC) by applying magnetic and/or electric fields. These electrons perpendicularly impact the surface of a curved material that has a particular curvature ratio (anode), thus generating X-rays. The interaction of the electrons with the atoms of the anodes material generate X-rays with a non-isotropic angular-spatial distribution, with a greater concentration in the focal direction, which is defined by the geometry of the anode. A curved collimator with an adequate curvature ratio is attached to the back of the anode. The collimator is made up of an array of a great number of small holes that point toward the focal point. This device transmits X-rays solely in the focal direction. The Summary Figure presents a typical configuration of the invention that has been presented.


Patent
University of the Frontier and National University of Cordoba | Date: 2014-03-26

A piece of scientific/technological equipment is presented for the generation of a convergent photon beam for radiotherapy or other applications. This equipment consists of adequately modifying the trajectory of an electron beam from a linear accelerator (LINAC) by applying magnetic and/or electric fields. These electrons perpendicularly impact the surface of a curved material that has a particular curvature ratio (anode), thus generating X-rays. The interactions of the electrons with the atoms of the anodes material generate X-rays with a non-isotropic angular-spatial distribution, with a greater concentration in the focal direction, which is defined by the geometry of the anode. A curved collimator with an adequate curvature ratio is attached to the back of the anode. The collimator is made up of an array of a great number of small holes that point toward the focal point. This device transmits X-rays solely in the focal direction. The Summary Figure presents a typical configuration of the invention that has been presented.


Rojas R.,National University of Cordoba
Applied Clay Science | Year: 2014

Layered double hydroxides are increasingly studied as heavy metal scavengers due to their acid/base buffering capacity that leads to hydroxide precipitation. Their intercalation with ligands such as edta also provides active sites for heavy metal chelation to these solids. In this work, both mechanisms are studied in Ca-Al layered double hydroxides (LDHs) with a Friedel's salt layered structure and intercalated with either nitrate (Ca-Al-NO3) or [Ca(edta)]2- (Ca-Al-[Ca(edta)]). With this aim, the acid-base buffering capacity of these solids was determined and their removal behavior studied as a function of equilibrium concentration and pH. The solids presented high instability, Ca2+ ions being selectively leached at pH values as high as 8. As a consequence, high affinity and large removal capacity of Cu2+, Cd2+ and Pb2+ were obtained for Ca-Al-NO3 by a hydroxide precipitation mechanism. The removal capacity of Ca-Al-[Ca(edta)] was quite similar, however, a portion of heavy metal ions was solubilized due to [Ca(edta)]2- release. The heavy metal hydroxides obtained by the Ca-Al LDH removal action produced immobilization at pH values lower than those produced by simple alkalinization. © 2013 Elsevier B.V.


Suarez Morell E.,Federico Santa María Technical University | Foa Torres L.E.F.,National University of Cordoba
Physical Review B - Condensed Matter and Materials Physics | Year: 2012

We report on the effects of laser illumination on the electronic properties of bilayer graphene. By using Floquet theory combined with Green's functions, we unveil the appearance of laser-induced gaps not only at integer multiples of Ω/2 but also at the Dirac point with features which are shown to depend strongly on the laser polarization. Trigonal warping corrections are shown to lead to important corrections for radiation in the terahertz range, reducing the size of the dynamical gaps. Furthermore, our analysis of the topological properties at low energies reveals that, when irradiated with linearly polarized light, ideal bilayer graphene behaves as a trivial insulator, whereas circular polarization leads to a nontrivial insulator per valley. © 2012 American Physical Society.


Dotti G.,National University of Cordoba
Physical Review Letters | Year: 2014

A proof is given that the space L of solutions of the linearized vacuum Einstein equation around a Schwarzschild black hole is parametrized by two scalar fields, which are gauge invariant combinations of perturbed algebraic and differential invariants of the Weyl tensor and encode the information on the odd (-) and even (+) sectors L±. These fields measure the distortion of the geometry caused by a generic perturbation and are shown to be pointwise bounded on the outer region r≥2M. © 2014 American Physical Society.


Castillo J.J.,National University of Cordoba
International Journal of Machine Learning and Cybernetics | Year: 2011

In this paper we explain how to build a recognizing textual entailment (RTE) system which only uses semantic similarity measures based on WordNet. We show how the widely used WordNet-based semantic measures can be generalized to build sentence level semantic metrics in order to be used in both mono-lingual and cross-lingual textual entailment. We experiment with a wide variety of RTE datasets and evaluate the contribution of an algorithm which expands the RTE monolingual corpus. Results achieved with this method yielded significant statistical differences when predicting RTE test sets. We provide an efficiency analysis of these metrics drawing some conclusions about their practical utility in recognizing textual entailment. We also analyze the cross-lingual textual entailment task, we create a bilingual English-Spanish corpus, and propose a procedure to create a cross-lingual textual entailment corpus for any pair of languages. Finally, we show that the proposed method is enough to build an average score RTE system in both monolingual and cross-lingual textual entailment, that uses semantic information from WordNet as the only source of lexical-semantic knowledge. © 2011 Springer-Verlag.


Dain S.,National University of Cordoba
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2015

Bekenstein bounds for the entropy of a body imply a universal inequality between size, energy, angular momentum, and charge. We prove this inequality in electromagnetism. We also prove it, for the particular case of zero angular momentum, in general relativity. We further discuss the relation of these inequalities with inequalities between size, angular momentum, and charge recently studied in the literature. © 2015 American Physical Society.


Conti G.,National University of Cordoba | Diaz S.,National University of Cordoba
Journal of Ecology | Year: 2013

Carbon storage in vegetation and soil underpins climate regulation through carbon sequestration. Because plant species differ in their ability to capture, store and release carbon, the collective functional characteristics of plant communities (functional diversity) should be a major driver of carbon accumulation in terrestrial ecosystems. Three major components of plant functional diversity could be put forward as drivers of carbon storage in ecosystems: the most abundant functional trait values, the variety of functional trait values and the abundance of particular species that could have additional effects not incorporated in the first two components. We tested for associations between these components and carbon storage across 16 sites in the Chaco forest of Argentina under the same climate and on highly similar parental material. The sites differed in their plant functional diversity caused by different long-term land-use regimes. We measured six plant functional traits in 27 species and weighted them by the species abundance at each site to calculate the community-weighted mean (CWM) and the functional divergence (FDvar) of each single trait and of multiple traits (FDiv). We also measured plant and soil carbon storage. Using a stepwise multiple regression analysis, we assessed which of the functional diversity components best explained carbon storage. Both CWM and FDvar of plant height and wood-specific gravity, but no leaf traits, were retained as predictors of carbon storage in multiple models. Relationships of FDvar of stem traits and FDiv with carbon storage were all negative. The abundance of five species improved the predictive power of some of the carbon storage models. Synthesis. All three major components of plant functional diversity contributed to explain carbon storage. What matters the most to carbon storage in these ecosystems is the relative abundance of plants with tall, and to a lesser extent dense, stems with a narrow range of variation around these values. No consistent link was found between carbon storage and the leaf traits usually associated with plant resource use strategy. The negative association of trait divergence with carbon storage provided no evidence in support to niche complementarity promoting carbon storage in these forest ecosystems. © 2013 The Authors. Journal of Ecology © 2013 British Ecological Society.


Caceres D.M.,National University of Cordoba
Journal of Agrarian Change | Year: 2015

Drawing upon the concept of 'accumulation by dispossession', this paper analyses the expansion of agrarian capital in Argentina. A case study illustrates the social and environmental impacts of the expansion of agribusiness in central Argentina and the social struggle - both rural and urban - that has arisen to resist this process. Although government policies after the 2001 crisis differ in many ways from those of the 1990s, current agrarian policies are not significantly distinct from those followed during the pre-crisis neoliberal period. Rather than 'post-neoliberal', the new model could thus be better described as 'neo-extractivist'. With the connivance of the state, agribusiness is producing the largest-ever transformation of natural capital into economic capital in the history of the region. Moreover, the latest policy developments suggest that Argentina is on the threshold of a new and deeper stage of agrarian capital expansion and wealth concentration, this time operating at a much larger scale. © 2015 John Wiley & Sons Ltd.

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