Characterizing correlations and synchronization in collective dynamics

Synchronization, that occurs both for non-chaotic and chaotic systems, is a striking phenomenon with many practical implications in natural phenomena. However, even before synchronization, strong correlations occur in the collective dynamics of complex systems. To characterize their nature is essential for the understanding of phenomena in physical and social sciences. The emergence of strong correlations before synchronization is illustrated in a few piecewise linear models. They are shown to be associated to the behavior of ergodic parameters which may be exactly computed in some models. The models are also used as a testing ground to find general methods to characterize and parametrize the correlated nature of collective dynamics.Comment: 37 pages, 37 figures, Late

Cooperation, Punishment, Emergence of Government, and the Tragedy of Authorities

Under the conditions prevalent in the late Pleistocene epoch (small hunter-gatherer groups and frequent inter-group conflicts), coevolution of gene-related behavior and culturally transmitted group-level institutions provides a plausible explanation for the parochial altruistic and reciprocator traits of most modern humans. When, with the agricultural revolution, societies became larger and more complex, the collective nature of the monitoring and punishment of norm violators was no longer effective. This led to the emergence of new institutions of governance and social hierarchies. The transition from an egalitarian society and the acceptance of the new institutions may have been possible only if, in the majority of the population, the reciprocator trait had become an internalized norm. However, the new ruling class has its own dynamics, which in turn may lead to a new social crisis. Using a simple model inspired by previous work by Bowles and Gintis, these effects are studied here

Sobre el hambre, la des(in)civilización y la colonización : cercanías entre la Eztétyka de Glauber Rocha y el Discurso de Aimé Cesairé

El ensayo Eztétyka del hambre (1965) del realizador brasileño Glauber Rocha intenta establecer una encrucijada discursiva que impugna a la empresa del colonialismo y que asume al hambre en tanto elemento y consecuencia que permite enlazar la violencia y la vergüenza del colonizado, trabajando así oposicionalmente contra las representaciones dominantes de Occidente. Por otro lado, en Discurso sobre el colonialismo (1956) el pensador martiniqués Aimé Cesairé construye un conjunto amplio de categorías que parecen abordar al hecho colonial bajo la dimensión de una experiencia alienante que desciviliza, embrutece y salvajiza al colonizador, siendo un trabajo donde, a su vez, habita una crítica que pone en entredicho el proyecto histórico (racista) de la colonización. Así entonces, transitaremos por estos dos trabajos entendiendo que en sus enunciados entran juego categorías sostenidas, siguiendo a Marc Angenot, por el pathos dominante discursivo de una época, caracterizado por una perspectiva anti-colonial que considera la heterogeneidad que circula en Latinoamérica y el Caribe, junto con cuestionar los mecanismos de otrerización que se activan en el devenir de la experiencia colonial. De esta manera, intentaremos establecer relaciones de vecindad entre las categorías de hambre, des(in)civilización y colonización, considerando cómo es un lugar de enunciación que se encuentra cruzado por la emergencia lo excluido y lo negado lo que habilita la autonomía del pensamiento crítico de Rocha y Cesairé, y los posibles vínculos entre ambos.Fil: Carlos Aguirre Aguirre . Universidad de Playa Ancha (Valparaíso, Chile

The impact of real estate projects and their sustainability characteristics on land values: cause or consequence? two case studies from Santiago, Chile

From the point of view of developers, there is the belief that location determines the main characteristics of real estate projects. On the contrary, the bid rent theory proposes that land receives value from that which it supports, as expressed by means of architectural attributes. In light of two case studies in Santiago, Chile, the relationship between land value and real estate value was studied with the aim of identifying the meaning of this causality and the role of sustainability characteristics – as an expression of emergent architectural attributes – in price formation. It was observed that the interaction between land value and architectural characteristics generates property price through circular causality, where there is a certain typology for each location that can produce submarkets. In this sense, sustainability attributes effectively influence the creation of value – but not linearly – which clearly suggests the presence of housing submarkets according to price level, and a new element in the relationship between land and architectural attributes.Postprint (published version

La Política regional en el siglo XXI y creación de empleo

TERCER PANEL: Iniciativas para la creación de emple

Gelation of n3p3[nh(ch2)3si(oet)3]6-n [x]n x = nh(ch2)3si(oet)3, nch3(ch2)3cn and oc6h4(ch2)cn, n = 0 or 3 at the liquid/air/interface

Indexación: ScieloThe compounds N3P3[NH(CH2)3Si(OEt)3]6 (1), N3P3[NH(CH2)3Si(OEt)3]3[NCH3(CH2)3CN]3 (2) and N3P3[NH(CH2)3Si(OEt)3]3 [HOC6H4(CH2)CN]3 (3) undergo slow gelation at the interface oil/air at low temperatures to give perfect gels G1, G2 and G3 respective ly. TEM analysis reveals nanoparticles of silica with mean size of about 10 nm. Pyrolysis under air at 800 °C of these gels affords a mixture of mainly Si5(PO4)6O, SiP2O7 and SiO2. Gelation and pyrolysis products were characterized by IR, solid-state NMR, TEM, SEM-EDAX microscopy and X-ray diffraction. The sol-gel process in the interface liquid /air is discussed in comparison with the usual sol-gel solution process.http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072010000300031&nrm=is