5,396 research outputs found
Revisitaciones, huidas y desbordes en la novela argentina contemporánea. 16H302
El proyecto se propuso abordar distintas estrategias narrativas y novelísticas a partir de
conceptos relacionados con las investigaciones que los integrantes del equipo están llevando a cabo, tales como realismo, márgenes, hibridez genérica.
Habría en la novela contemporánea una suerte de desborde, idea que surge a raíz de percibir una disolución del género que viene desde muy antiguo y que sigue activa.
El proyecto pretende asimismo delimitar las nociones de real y realidad para volverlos
funcionales al trabajo a realizar y a la vez indagar sobre las relaciones entre los mismos y el denso concepto de realismo.
Por otro lado se intenta evidenciar las relaciones entre la hibridez y la contaminación con la nombrada disolución.
Las problemáticas del realismo en la novela se investigarán a la luz de la escritura y sus nexos con lo referencial. En ella se rastrearán las ascendencias de disolución del género novela, dado que los autores ya trabajan en un marco desbordado, un marco que se instaló hace casi un siglo y ha seguido proliferando en linajes variados hasta el siglo XXI.
Se trata trabajar categorías que permitan una permanente revisitación del concepto y por eso mismo, un enriquecimiento de métodos, abordajes y lecturas.
Las marginalidades y los márgenes son conceptos muy presentes en las investigaciones individuales de los participantes de este proyecto (de la marginalidad social presente en las historias narradas al margen físico de los libros como espacio significante.) El margen es un anclaje concreto desde el cual poner en acto el punto de partida. Por tal motivo se intentarán definiciones puntuales para los recorridos y los trabajos de cada uno, que luego podrán relacionarse en artefactos teórico-críticos productivos
Transport and thermodynamic properties of KFSI in TEP by operando Raman gradient analysis
Understanding and characterizing the transport and thermodynamic properties of electrolytes are critical for optimizing battery performance. In this study, we employ operando Raman gradient analysis (ORGA) to characterize the concentration-dependent diffusion coefficient, transference number, ionic conductivity, and thermodynamic factor of potassium bis(fluorosulfonyl)imide (KFSI) in triethyl phosphate (TEP), an ideal model system and one of the most promising K-ion battery electrolytes. ORGA demonstrates results consistent with conventional state-of-the-art methods while proving to be significantly more electrolyte- and time-efficient. Additionally, we probe, for the first time, the concentration-dependent transport and thermodynamic properties of KFSI-TEP, providing key parameters for K-ion battery modeling
A Kernel of Truth: Determining Rumor Veracity on Twitter by Diffusion Pattern Alone
Recent work in the domain of misinformation detection has leveraged rich
signals in the text and user identities associated with content on social
media. But text can be strategically manipulated and accounts reopened under
different aliases, suggesting that these approaches are inherently brittle. In
this work, we investigate an alternative modality that is naturally robust: the
pattern in which information propagates. Can the veracity of an unverified
rumor spreading online be discerned solely on the basis of its pattern of
diffusion through the social network?
Using graph kernels to extract complex topological information from Twitter
cascade structures, we train accurate predictive models that are blind to
language, user identities, and time, demonstrating for the first time that such
"sanitized" diffusion patterns are highly informative of veracity. Our results
indicate that, with proper aggregation, the collective sharing pattern of the
crowd may reveal powerful signals of rumor truth or falsehood, even in the
early stages of propagation.Comment: Published at The Web Conference (WWW) 202
Aggregates of Chemically Functionalized Multiwalled Carbon Nanotubes as Viscosity Reducers
Confinement and surface effects provided by nanoparticles have been shown to produce changes in polymer molecules affecting their macroscopic viscosity. Nanoparticles may induce rearrangements in polymer conformation with an increase in free volume significantly lowering the viscosity. This phenomenon is generally attributed to the selective adsorption of the polymer high molar mass fraction onto nanoparticles surface when the polymer radius of gyration is comparable to the nanoparticles characteristic dimensions. Carbon nanotubes seem to be the ideal candidate to induce viscosity reduction of polymer due to both their high surface-to-volume ratio and their nanometric sizes, comparable to the gyration radius of polymer chains. However, the amount of nanotube in a polymer system is limited by the percolation threshold as, above this limit, the formation of a nanotubes network hinders the viscosity reduction effect. Based on these findings, we have used multiwalled carbon nanotubes MWCNT “aggregates” as viscosity reducers. Our results reveal both that the use of nanotube clusters reduce significantly the viscosity of the final system and strongly increase the nanotube limiting concentration for viscosity hindering. By using hydroxyl and carboxyl functionalized nanotubes, this effect has been rather maximized likely due to the hydrogen bridged stabilization of nanotube aggregates
Limited Lifespan of Fragile Regions in Mammalian Evolution
An important question in genome evolution is whether there exist fragile
regions (rearrangement hotspots) where chromosomal rearrangements are happening
over and over again. Although nearly all recent studies supported the existence
of fragile regions in mammalian genomes, the most comprehensive phylogenomic
study of mammals (Ma et al. (2006) Genome Research 16, 1557-1565) raised some
doubts about their existence. We demonstrate that fragile regions are subject
to a "birth and death" process, implying that fragility has limited
evolutionary lifespan. This finding implies that fragile regions migrate to
different locations in different mammals, explaining why there exist only a few
chromosomal breakpoints shared between different lineages. The birth and death
of fragile regions phenomenon reinforces the hypothesis that rearrangements are
promoted by matching segmental duplications and suggests putative locations of
the currently active fragile regions in the human genome
CD31 signals confer immune privilege to the vascular endothelium
This work was supported by British Heart Foundation Grant FS/11/64/
2894
Synthesis, characterization and antiproliferative activity on mesothelioma cell lines of bis(carboxylato)platinum(IV) complexes based on picoplatin
The synthesis and characterization of a series of picoplatin-based ( picoplatin = [PtCl2(mpy)(NH3)], mpy = 2-methylpyridine), Pt(IV) complexes with axial carboxylato ligands of increasing length are reported. The synthesis is based on the oxidation with hydrogen peroxide of picoplatin to give the cis,cis,trans- [PtCl2(mpy)(NH3)(OH)2] intermediate and then its transformation into the dicarboxylato complexes cis, cis,trans-[PtCl2(mpy)(NH3)(RCOO)2] (R = CH3(CH2)n, n = 0-4) with the corresponding anhydride. Pt(IV) complexes with n = 0-2 were selected to be tested on four malignant pleural mesothelioma (MPM) cell lines, on human mesothelial cells (HMC), and on the cisplatin-sensitive ovarian A2780 cell line along with cisplatin as a metallo-drug reference. In general, the longer the axial chain, the more cytotoxic and selective the Pt(IV) complex is. Pt(IV) analogs show good activity on the MPM cell lines, approaching or in some case bypassing that of cisplatin and represent quite promising drug candidates for the treatment of tumors whose chemoresistance is mainly based on glutathione overexpression, such as MPM
Mobility promotes and jeopardizes biodiversity in rock-paper-scissors games
Biodiversity is essential to the viability of ecological systems. Species
diversity in ecosystems is promoted by cyclic, non-hierarchical interactions
among competing populations. Such non-transitive relations lead to an evolution
with central features represented by the `rock-paper-scissors' game, where rock
crushes scissors, scissors cut paper, and paper wraps rock. In combination with
spatial dispersal of static populations, this type of competition results in
the stable coexistence of all species and the long-term maintenance of
biodiversity. However, population mobility is a central feature of real
ecosystems: animals migrate, bacteria run and tumble. Here, we observe a
critical influence of mobility on species diversity. When mobility exceeds a
certain value, biodiversity is jeopardized and lost. In contrast, below this
critical threshold all subpopulations coexist and an entanglement of travelling
spiral waves forms in the course of temporal evolution. We establish that this
phenomenon is robust, it does not depend on the details of cyclic competition
or spatial environment. These findings have important implications for
maintenance and evolution of ecological systems and are relevant for the
formation and propagation of patterns in excitable media, such as chemical
kinetics or epidemic outbreaks.Comment: Final submitted version; the printed version can be found at
http://dx.doi.org/10.1038/nature06095 Supplementary movies are available at
http://www.theorie.physik.uni-muenchen.de/lsfrey/images_content/movie1.AVI
and
http://www.theorie.physik.uni-muenchen.de/lsfrey/images_content/movie2.AV
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