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Search Results: 1 - 10 of 198362 matches for " Carlos B. Duarte "
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Massive Compact Stars as Quark Stars
Hilario Rodrigues,Sergio B. Duarte,Jos Carlos T. de Oliveira
Physics , 2014, DOI: 10.1088/0004-637X/730/1/31
Abstract: High massive compact stars have been reported recently in the literature, providing strong constraints on the properties of the ultradense matter beyond the saturation nuclear density. In view of these results, the calculations of quark star or hybrid star equilibrium structure must be compatible with the provided observational data. But, since the used equations of state describing quark matter are in general too soft, in comparison with the equation of states used to describe the hadronic or nuclear matter, the calculated quark star models presented in the literature are in general not suitable to explain the stability of high compact massive objects.
Capitalismo, etnicidad y globalizacion: el caso andino
Duarte,Carlos;
Análisis Político , 2006,
Abstract: during the last the 15 years the phenomena of ethnic mobilization, have taken an unusual importance within the globalisation. the objective of this paper will be to present the general cadre in which these phenomena follow one another, regarding the affinities and specificities of these processes in three countries of the andean area ( colombia, ecuador and bolivia ). the intention will be to show how the indigenous policies of the andean states correspond with the processes of expansion and capitalist accumulation. by this way, we set out to locate the impacts produced by the neoliberal reforms imposed to the andean states, within the present phenomena of "globalization" and "location". finally we will try to suggest some analyses that demonstrate the relation between the revitalisation of the indigenous organization, the production of the expert knowledge and the famous "paradoxes of the ethnicity ".
IMPLEMENTACIóN Y CRISIS DEL ACTUAL SISTEMA DE GOBERNABILIDAD MINERA EN COLOMBIA: EL MODELO DE ENCLAVE EXPORTADOR IMPLEMENTATION AND CRISIS OF THE CURRENT MINING GOVERNANCE SYSTEM IN COLOMBIA: THE MODEL OF EXPORT ENCLAVE
Carlos Duarte
Análisis Político , 2012,
Abstract: Este trabajo se sustenta en una revisión a las transformaciones contemporáneas de la legislación colombiana, buscando caracterizar cual es el modelo de gobernabilidad minera a partir de la Constitución de 1991. Para tal fin se desarrolla un ejercicio comparativo entre el sistema legislativo inmediatamente precedente (el Código minero de 1988), continuando con la legislación que gravita alrededor de la Ley 685 (Código minero vigente), para finalizar con los discusiones jurídicas y sociales que llevarían a declarar inexequible la última de las reformas legislativas (Ley 1382 del 2010). Este ejercicio busca delinear la administración de los recursos mineros bajo la tensión entre las políticas de apertura económica y los derechos sociales consagrados en la nueva constitución. A modo de conclusión se problematiza el actual sistema de gobernanza minera frente a anteriores modelos de gobernanza minera implementados en el país. Luego, se realiza un paralelo entre la legislación colombiana y los principales elementos que vienen transformándose en la legislación minera chilena. Finalmente, se plantea hasta que punto una administración del subsuelo que busca a toda costa ofrecer las mejores garantías para que la explotación minera se realice de acuerdo a los intereses multinacionales, puede convertirse en herramienta de despojo hacia la pe6que a minería y numerosos territorios habitados por poblaciones étnicas This work is based on a review of contemporary transformations of Colombian law, seeking to characterize the mining governance model from 1991 Constitution until now. To this end, a comparison is developed between the immediately preceding legal system (the Mining Code of 1988), followed by the Law 685 (current Mining Code), to arrive at the legal and social discussions that would lead to declare unconstitutional the latest legislative changes (Act 1382 of 2010). This exercise intends to delineate the management of mineral resources under the tension between policies of economic liberalization and social rights recognized in the new constitution. As a conclusion, it questions the current governance system compared to previous mining governance models implemented in the country. Then, a parallel between the Colombian legislation and the main elements that are changing in the Chilean mining legislation is done. Then, it analyzes how and administration that seeks, at all cost, to provide the best guarantee that the mining is done in accordance with multinational interests, can become an accessory of dispossession against the small miners in territories inhabite
Capitalismo, etnicidad y globalizacion: el caso andino Capitalism, etnicidad and globalizacion: The Andean case
Carlos Duarte
Análisis Político , 2006,
Abstract: Durante los últimos 15 a os los fenómenos de reivindicación étnica y de movilización social desde los espacios locales, han tomado un auge inusitado en el marco de la globalización. El objetivo de este escrito será presentar el encuadramiento general en el que se suceden estos fenómenos, fijando la mirada en las afinidades y especificidades de estos procesos en tres países del área andina (Colombia, Ecuador y Bolivia). La intención será mostrar hasta que punto las políticas indigenistas de los estados nación andinos corresponden con los procesos de expansión y acumulación capitalista. De esta manera, nos proponemos situar los impactos producidos por las reformas neoliberales al antiguo modelo de estado-nación, dentro de los actuales fenómenos de "globalización" y "localización". Finalmente se pretenderá sugerir algunas líneas de análisis que evidencien la relación entre la revitalización de la organización indígena, la producción del conocimiento experto y las famosas "paradojas de la etnicidad". During the last the 15 years the phenomena of ethnic mobilization, have taken an unusual importance within the globalisation. The objective of this paper will be to present the general cadre in which these phenomena follow one another, regarding the affinities and specificities of these processes in three countries of the Andean area ( Colombia, Ecuador and Bolivia ). The intention will be to show how the indigenous policies of the Andean states correspond with the processes of expansion and capitalist accumulation. By this way, we set out to locate the impacts produced by the neoliberal reforms imposed to the Andean states, within the present phenomena of "globalization" and "location". Finally we will try to suggest some analyses that demonstrate the relation between the revitalisation of the indigenous organization, the production of the expert knowledge and the famous "paradoxes of the ethnicity ".
17β-Estradiol promotes the synthesis and the secretion of annexin I in the CCRF-CEM human cell line
Margarida Castro-Caldas,Carlos B. Duarte,Arsélio P. Carvalho,M. Celeste Lopes
Mediators of Inflammation , 2001, DOI: 10.1080/09629350120093713
Abstract: Aims: Annexin I (ANXA1), a 37 kDa member of the annexin family of Ca2
Release of IL-1 via IL-1-Converting Enzyme in a Skin Dendritic Cell Line Exposed to 2,4-Dinitrofluorobenzene
Teresa J. Matos,Sara P. Jaleco,Margarida Gon alo,Carlos B. Duarte,M. Celeste Lopes
Mediators of Inflammation , 2005, DOI: 10.1155/mi.2005.131
Abstract: We used a mouse fetal skin dendritic cell line (FSDC) to study the effect of the strong allergen 2,4-dinitrofluorobenzene (DNFB) on interleukin (IL)-1β release and IL-1β receptor immunoreactivity. Stimulation with DNFB (30 minutes) increased IL-1β release without changing the mRNA levels of the protein. Furthermore, DNFB increased transiently the interleukin-1β-converting enzyme (ICE) activity, as measured with its fluorogenic substrate Z-Tyr-Val-Ala-Asp-AFC. The ICE inhibitor Z-YVAD-FMK prevented the release of IL-1β evoked by DNFB. Incubation of the cells with DNFB (30 minutes) strongly increased IL-1β receptor immunoreactivity. The rapid effect of DNFB on the release of mature IL-1β, without inducing an increase of IL-1β mRNA in FSDC, suggests a posttranslational modification of pro-IL-1β by ICE activity.
Analyzing the effects of asymmetric unicast routes on multicast routing protocols
Costa, Luís Henrique M. K.;Fdida, Serge;Duarte, Otto Carlos M. B.;
Journal of the Brazilian Computer Society , 2001, DOI: 10.1590/S0104-65002001000100002
Abstract: different multicast routing protocols construct their distribution trees based on the information obtained from the unicast routing infrastructure. nevertheless, the design of most of these protocols do not take into account that unicast routes may be asymmetric. indeed, unicast routes in the internet are very asymmetric. the effects on the quality of the multicast trees vary according to the routing protocol. these are particularly important for protocols that use the recursive unicast approach to allow the progressive deployment of the multicast service. this paper analyses the effects of asymmetric unicast routing on different multicast protocols. we concentrate on two approaches that implement the multicast service trough recursive unicast trees, hbh (hop-by-hop multicast routing protocol) and reunite (recursive unicast trees). both protocols construct source-specific trees exclusively, which simplify address allocation. as data packets have unicast destination addresses, pure unicast routers are transparently supported. the branching-nodes recursively create packet copies to implement the distribution. nevertheless, the tree construction algorithms implemented by hbh and reunite are different. the design of hbh takes into account the unicast routing asymmetries of the network. hbh is able to always construct a shortest-path tree. consequently, hbh provides shorter delay routes in asymmetric networks, and provides smaller bandwidth consumption because useless data duplication is avoided. the results obtained from simulation show the effects of unicast routing asymmetries in the different multicast protocols.
Virtual layering and efficient merging in non-cooperative multicast trees
Amorim, Marcelo Dias de;Duarte, Otto Carlos M. B.;Pujolle, Guy;
Journal of the Brazilian Computer Society , 2001, DOI: 10.1590/S0104-65002001000100004
Abstract: a critical problem faced by feedback-merger mechanisms is the lack of information that is discarded due to the hidden nodes in multicast trees. a node is said to be hidden from another if it is located in a sub tree that is a result from a fork in any upstream node. we propose in this paper the virtual layering scheme to avoid the problem caused by hidden-nodes in multi-layered multicast video environments. the virtual layering scheme induces intermediate nodes to keep extra states of the multicast session, which reduces the video degradation for the whole set of receivers. furthermore, this scheme is coupled with the direct algorithm in order to improve the degree of satisfaction at heterogeneous receivers. the algorithm relies on a mechanism that dynamically controls the rates of the video layers and addresses scalability issues by implementing a merging procedure at intermediate nodes in order to avoid packet implosion at the source. the virtual layering scheme combined with the direct algorithm is optimized to achieve high global video quality and reduced bandwidth requirements. the results show that the proposed scheme leads to improved global video quality at heterogeneous receivers with no cost of extra bandwidth.
Hair Analysis of Mammals of Brazilian Wildlife for Forensic Purposes  [PDF]
Tália Missen Tremori, Fernanda Marion Monteiro Garcia, Luis Mauricio Montoya Flórez, Bianca Picado Gon?alves, Bárbara Wagner Duarte Ferraz de Camargo, Claire Gwinnett, Carlos Roberto Teixeira, Noeme Sousa Rocha
Open Journal of Animal Sciences (OJAS) , 2018, DOI: 10.4236/ojas.2018.83025
Abstract: Wildlife trafficking is classified as the fourth largest illegal commerce in the world. Taxonomic identification of wildlife is an ordinary process for forensics experts. The aim of this study was to analyze animal’s hair from Brazilian’s wildlife through microscopic and compare morphology of bristle among species analyzed. Hair samples of nine species were analyzed. Glass slides were analyzed through optical microscopy and following measurements were obtained: total length, medulla diameter, overall diameter and overall ratio diameter of the medulla’s diameter. The images obtained at identification of animals through the morphology of hair and the statistics analysis corroborates in favor for the validation of the technique.
Gobernabilidad política, gobernanza economica y gobiernos indígenas.
Benavides,Carlos; Duarte,Carlos;
Análisis Político , 2010,
Abstract: this article will go over the legislative transformations, as well as conceptions and effects of the implementation of the general system of participation (gsp) at indigenous towns. the institutional, public and private relations derived from the system of transferences will be analyzed by using the notions of governance and self government. under this light, we try to characterize the technocratic and budgeting limits of civil and political rights stated, in the 1991 constitution, for indigenous populations.
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