Search in leptonic channels for heavy resonances decaying to long-lived neutral particles

A search is performed for heavy resonances decaying to two long-lived massive neutral particles, each decaying to leptons. The experimental signature is a distinctive topology consisting of a pair of oppositely charged leptons originating at a separated secondary vertex. Events were collected by the CMS detector at the LHC during pp collisions at √s = 7 TeV, and selected from data samples corresponding to 4.1 (5.1) fb-1 of integrated luminosity in the electron (muon) channel. No significant excess is observed above standard model expectations, and an upper limit is set with 95% confidence level on the production cross section times the branching fraction to leptons, as a function of the long-lived massive neutral particle lifetime. Copyright CERN.

The igapó of the Negro River in central Amazonia: Linking late-successional inundation forest with fluvial geomorphology

Despite important progress on Amazonian floodplain research, the flooded forest of the Negro River igapó has been little investigated. In particular, no study has previously focused the linkage between fluvial geomorphology and the floristic variation across the course of the river. In this paper we describe and interpret relations between igapó forest, fluvial geomorphology and the spatial evolution of the igapó forest through the Holocene. Therefore, we investigate the effect of geomorphological units of the floodplain and channel patterns on tree diversity, composition and structural parameters of the late-successional igapó forest. Our results show that sites sharing almost identical flooding regime, exhibit variable tree assemblages, species richness and structural parameters such as basal area, tree density and tree heights, indicating a trend in which the geomorphologic styles seem to partially control the organization of igapó's tree communities. This can be also explained by the high variability of well-developed geomorphologic units in short distances and concentrated in small areas. In this dynamic the inputs from the species pool of tributary rivers play a crucial role, but also the depositional and erosional processes associated with the evolution of the floodplain during the Holocene may control floristic and structural components of the igapó forests. These results suggest that a comprehensive approach integrating floristic and geomorphologic methods is needed to understand the distribution of the complex vegetation patterns in complex floodplains such as the igapó of the Negro River. This combination of approaches may introduce a better comprehension of the temporal and spatial evolutionary analysis and a logic rationale to understand the vegetation distribution and variability in function of major landforms, soil distributions and hydrology. Thus, by integrating the past into macroecological analyses will sharpen our understanding of the underlying forces for contemporary floristic patterns along the inundation forests of the Negro River. © 2013 Elsevier Ltd.

SIG e sensoriamento remoto aplicado ao estudo dos processos de inundação e mapeamento da cobertura vegetal na planície fluvial do alto Rio Paraná

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Inventario de infraestructura y equipo de transporte fluvial en la Cuenca del Plata

Incluye Bibliografía

Transporte fluvial en la Cuenca del Plata

Incluye Bibliografía

Sistema de navegación lacustre y fluvial entre Costa Rica y Nicaragua

Documento presentado como documento de trabajo (CCE/SC.3/II/DT.5) por la Delegación de Costa Rica a la segunda reunión del Subcomité Centroamericano de transportes, celebrada en Managua, Nicaragua, en junio de 1963.

Morfologia e hidrodinâmica em rios multicanais (anabranching): exemplo do alto rio Paraná

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Processos fluviais em barras de soldamento: rio Paraná - PR

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Aspectos institucionales del transporte fluvial en la Cuenca del Plata: versión preliminar

Preparado sobre la base de los documentos E/CEPAL/R.244/Add.1 y E/CEPAL/R.260/Rev.1

Conectando América del Sur: Movilidad fluvial y sistemas de navegación fluvial

El objetivo del presente boletín FAL es destacar la importancia de los ríos dentro el sistema de transporte de América del Sur. El planteamiento de la temática de movilidad fluvial y la formulación de políticas no solamente es importante para el desarrollo del transporte fluvial sino también por su impacto social y económico, especialmente en regiones donde la provisión de infraestructura terrestre se dificulta debido a la propia geografía. En estas regiones, los gobiernos deben reconocer que los ríos navegables, como únicas vías de traslado, sustituyen a las carreteras, y por tal motivo deben recibir un tratamiento y atención igualitaria a las carreteras.

C-TPAT and AEO: new channels for world trade

This edition of the FAL Bulletin analyses the requirements of and the advantages offered by the Customs-Trade Partnership Against Terrorism (C-TPAT) of the United States and the Authorized Economic Operator (AEO) programme implemented by the European Union.Supply chain security, especially for foodstuffs, has grown considerably in importance in recent years, owing to a combination of different factors which are emerging or becoming more significant, making the requirement of ensuring that a cargo is harmless increasingly essential and valuable during trade negotiations.In the field of certifying the harmlessness of a cargo, a number of private-sector standards have arisen worldwide, but the benefits offered by the C-TPAT and AEO programmes are well above those of their private-sector counterparts.As a first step, a comparative analysis of the programmes implemented by the two largest markets in the northern hemisphere is needed in order to provide to Latin American and Caribbean exporters the information they need in order to modify or tailor their installations and production procedures, to achieve greater market entry.

Interações entre o ambiente físico, uso e cobertura da terra e as características físicas e químicas no canal fluvial: a bacia hidrográfica do rio Santo Anastácio, Oeste Paulista (Dez. 2009 – Dez. 2010)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

La clasificación fluvial como herramienta de planificación y políticas públicas: conceptos de base y propuestas para América del Sur

El presente Boletín Fal está dedicado al tema de la clasificación de las vías de navegación interior en América del Sur. El Boletín describe los sistemas existentes de clasificación (CEMT/ CEPE), destacando su rol en el desarrollo del transporte fluvial. Sobre esa base, se discuten las lecciones aprendidas y se presenta una propuesta preliminar sobre la clasificación para América Latina.

O sistema estuarino do Delta do São Francisco-SE: análise ambiental com base no estudo de foraminíferos e tecamebas

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)