Latin America | EPFL Graph Search

Latin America is a cultural concept denoting the Americas where Romance languages—languages derived from Latin —are predominant. The term was coined in France in the mid-19th century to refer to regions in the Americas that were ruled by the Spanish, Portuguese, and French empires. The term does not have a precise definition, but it is "commonly used to describe South America, Central America, Mexico, and the islands of the Caribbean." In a narrow sense, it refers to Spanish America and Brazil (Portuguese America). The term "Latin America" is broader than categories such as Hispanic America, which specifically refers to Spanish-speaking countries; and Ibero-America, a term not generally used that specifically refers to both Spanish and Portuguese-speaking countries while leaving French and British excolonies aside. The term Latin America was first used in an 1856 conference called "Initiative of America: Idea for a Federal Congress of the Republics" (Iniciativa de la América. Idea de

Evaluation of bamboo for building elements satisfying housing criteria

David Javier Guzman Chavez

Bamboo – identified as a Non Timber Forest Product (NTFP) – offering optimal mechanical properties for construction purposes, and at the same time little studied among contemporary building materials, is paradoxically most used in precarious housing. The use of natural resources within the context of sustainable development is nowadays considered a subject of vital importance, especially in the construction industry, considered as being the largest consumer of world energy. This work concerns itself with two fundamental contemporary issues: the use of natural resources as a contribution to sustainable development and precarious housing. The topic of housing among the different problems relating to the construction industry is one of the most critical in developing countries since poverty entails precariousness in various aspects of the habitat and particularly in housing. The aim of this thesis is to validate a construction element designed using bamboo as its main constituent. Therefore in the first part, before presenting the composite bamboo structure, the CBS panel (an element designed within the framework of this thesis), the theme of precarious housing in relation to bamboo is examined. A final part gives insight into the appropriation and application of the proposed CBS panel. The first part, devoted to the link between bamboo and precarious housing, analyses the problems concerning social housing in developing countries. To identify how bamboo's use for construction is related to the social habitat, precarious housing is evaluated on the basis of the world view and aspirations of inhabitants. This will help determine the challenges involved in the construction proposals put forward to reduce the complex problems of social housing in the South. In this search, the reality of intermediate cities is examined to obtain a better understanding of the urbanisation phenomenon of metropolises versus the deterioration of the rural habitat within the context of globalisation (Chapters 1 and 2). The second part is devoted to presenting the composite bamboo structure (CBS panel) carrying out simple four-point load bending tests resulting in values that guarantee the element's load-bearing capacity, establishing the existence of a composite behaviour between bamboo and concrete. An experimental study, allowing the interaction between bamboo and concrete to be identified, was carried out. The use of bamboo in construction is validated via mechanical tests, studying the mechanical properties of bamboo and identifying high tensile strength, and confirming the weakness of bamboo, a longitudinal separation parallel to the grain. The investigation contributes to improvement by means of fibre reinforcement: natural, such as jute, and artificial, such as glass fibre, with compression tests made parallel and perpendicular to the fibre (Chapters 3, 4, 5 and 6). The third part concerns the study of appropriation and application criteria, applied to the composite bamboo structure (CBS panel). This part contains theoretical elements and a descriptive study with qualitative methodology that explores appropriation by various populations of Latin America, all involved with a construction project. This revision confirms the hypothesis that social appropriation is a complex issue that includes cultural, social and psychological elements, which are part of the emerging phenomenon of human settlements in precarious areas. The production of social housing is based on the study of the relationship between bamboo, its morphology, its applicability as construction system and the spaces that can be generated. Consequently the different possible forms of housing are presented, developing details of connections between the housing elements, and their chain of production. Quality control is identified as being the most important stage to guarantee the final product. Failure to carry out this control would be to jeopardise the success of not only the CBS panel but also the use of bamboo as resource. We also demonstrate that appropriation of a technology for a target group must be considered not only in relation to this group, but also introduce its use to a superior target group, since the reference factor is important (Chapter 7).

EPFL2008

Dominicans in Switzerland : patterns, practices and impacts of transnational migration and remittances linking the Dominican Republic and Switzerland = Dominicanos en Suiza : pautas, practicas e impactos de la migracion transnacional y el envio de remesas que vinculan Republica Dominicana y Suiza

This paper presents the results of a one-year empirical study documenting the patterns, practices and impacts of transnational migration by people from the Dominican Republic (DR) to Switzerland during the years 1980 to 2005. Additionally, discussion of the transfer of remittances sent by Dominicans in Switzerland and their use and impacts on one migrant-sending community in the DR is given a special focus. This case study is an original contribution to the small but growing literature documenting contemporary migration of Latin Americans to Europe, and in particular, to Switzerland.

2005

Understanding the origins and fate of air pollution in Bogota, Colombia

Erika Maria Zarate Torres

Bogota has more than 8 million inhabitants and is the 5th biggest urban agglomeration in Latin America. It has more than one million vehicles and a large number of small industries. High levels of air pollutants are thus detected. The purpose of this work consists in applying air quality modelling tools to the region of Bogota, aiming to acquire a deeper understanding of the factors that originate air pollution in the city, and of the way pollutants are dispersed and chemically transported. Furthermore, the knowledge gained is used to propose and evaluate air pollution abatement strategies. In the first part of this thesis, two versions of the traffic emission inventory are generated, one using standard CORINAIR traffic emission factors and the other using bulk real-world traffic emission factors. Both emission inventories are compared and evaluated with the help of numerical simulations. The emission inventory calculated using bulk real-world traffic emission factors generates simulated concentrations closer to the observed values. Thus, an innovative technique consisting in the combination of measurements and modelling to estimate and evaluate traffic emissions is proposed in this part of the study. In the second part, mesoscale meteorological and air quality models are applied to the city. The wind pattern developed over the complex topography of the region and the development of the plume of pollutants are simulated with success. In the third part of this work, the air quality model is used to study the plume of pollution in terms of the governing chemical regimes and the individual and combined effects of the main sources of emission. Traffic is the major contributor to the plume of pollutants in Bogota. Three feasible emission scenarios which are addressed to the mitigation of emissions from heavy traffic are evaluated with the model. Whereas reductions are attained for primary pollutants and aerosols (whose simulation is presented in the forth part of this work), levels of Ozone increase with these scenarios. The air quality model indicates that strategies directed to mitigate air pollution might have contradictory effects depending on the pollutant to be tackled. Air quality modelling proved to be a very useful tool for evaluating emission scenarios in advance and prioritizing actions to mitigate pollution in Bogota.

EPFL2007