Chelas Zone J revisited: Urban morphology and change in a recovering neighbourhood

Among new council housing areas from 1960s Lisbon is the Chelas Valley, by then overwhelmingly agrarian. Although an integral urbanization plan - the Plano de Urbanização de Chelas (PUC) – was prepared until 1964, the area was divided into six zones, urbanized in different periods, with great deviances from the original plan. Upon construction, Chelas was challenged by social problems. One of the zones, Zone J, has been particularly associated with this negative image. The architectural designs by Tomás Taveira and Victor Consiglieri introduced changes to the urban plan by Francisco Silva Dias and José Lobo de Carvalho. After construction, several municipal initiatives tried to improve living conditions in Zone J, ranging from façade changes to demolitions. All along, it has been accepted that the urban form of Zone J was a determinant factor of its failure as a habitat. Here, we revisit the original Zone J Plan. How was it implemented, and how has it changed since? What has been the input of the residents in the territory they inhabit? Can it contribute to make Lisbon a more sustainable city? This presentation aims to answer these questions while trying to identify parallels with other urban areas in a crisis that share morphological characteristics with Chelas Zone J.info:eu-repo/semantics/publishedVersio

Designing for productive urban landscapes. Applying the CPUL concept in Lisbon Metropolitan Area

Designing for urban agriculture has been recently acknowledged as a young discipline requiring the attention of architects, urban designers, and planners to promote more sustainable urban cities and continuous productive landscapes. However, how to assess such landscape proposals? How can these be evaluated in terms of their social, ecological, and spatial dimensions? Based on the Continuous Productive Urban Landscape (CPUL) tool proposed by Bohn and Viljoen (2005) this presentation exposes a framework for action which could be applied in Lisbon Metropolitan Area (LMA) in order to evaluate the spatiality of its the contemporary food system and promote design solutions to improve it. In order to do so, this paper is organized into three parts. First, it introduces the problem under analysis and the case study. Secondly, it exposes how an analysis of urban agriculture, more precisely along the Lisbon - Vila Franca de Xira axis, contributed to expanding our understanding of the productive dimension of the LMA Food System and interrelates it to a morphological perspective. Finally, it introduces the CPUL concept and a possible application of it within the case study, with impact at the several stages of food system.info:eu-repo/semantics/publishedVersio

Vanishing Viscosity Limits and Boundary Layers for Circularly Symmetric 2D Flows

We continue the work of Lopes Filho, Mazzucato and Nussenzveig Lopes [LMN], on the vanishing viscosity limit of circularly symmetric viscous flow in a disk with rotating boundary, shown there to converge to the inviscid limit in $L^2$-norm as long as the prescribed angular velocity $\alpha(t)$ of the boundary has bounded total variation. Here we establish convergence in stronger $L^2$ and $L^p$-Sobolev spaces, allow for more singular angular velocities $\alpha$, and address the issue of analyzing the behavior of the boundary layer. This includes an analysis of concentration of vorticity in the vanishing viscosity limit. We also consider such flows on an annulus, whose two boundary components rotate independently. [LMN] Lopes Filho, M. C., Mazzucato, A. L. and Nussenzveig Lopes, H. J., Vanishing viscosity limit for incompressible flow inside a rotating circle, preprint 2006

Avaliação de repositórios institucionais : análise comparativa

Só está disponível o resumo.Esta comunicação tem como objetivo apresentar os resultados da monitorização de três repositórios institucionais de instituições do ensino superior, politécnico e universitário, numa perspetiva comparativa

Where the fields have no name: urban-rural transitions in the Lisbon Region planning history

This paper discusses the existing urban-rural dichotomy in Portuguese urban planning, assuming its importance on food-provision, a basic human need. Our analysis stems from an historical overview at two scales, regional and municipal, within the Lisbon Region. Specifically, we identify key changes between two time-periods: the midtwentieth century, when design-based planning was established in Portugal for larger settlements, and nowadays, when it covers the totality of the national territory, based on land-use. We review these strategies, assessing what approaches would best encompass a sustainable transition of the food system. We start with the scheme of regional radial axis by architect Étienne de Gröer in contrast with the 2002 Lisbon Regional Plan. We furthermore expose two urbanization plans from 1940s: that of Vila Franca de Xira (1946) by Miguel Jacobetty and Faria da Costa and that of Palmela (1948) by João António Aguiar. Such plans, highly representative of the planning practices of that era, are then compared with their contemporary counterparts and subsequently with samples of their physical impacts on the ground, based on a morphological analysis of settlements and productive spaces in urban and rural contexts. Finally, we identify key changes for better use of productive soils within the Lisbon Region, considering challenges posed by international and national agendas.info:eu-repo/semantics/publishedVersio