Sociospatial reading of favela: A comparative analysis from organic Portuguese cities

This research decodifies the favelas spatial system through its configuration in com- parison to historical organic structures aiming at searching similar self-organized processes. It is intended to observe in which way the configuration of such areas, read through their spatial patterns, affects their sociospatial dynamics and how it gets closer to common strategies for organizing the urban space: in which way favela reproduces historically consolidated spatial patterns inherent to organic cities? The Theory of The Social Logic of Space (Hillier & Han- son, 1984) is the theoretical, methodological and technical approach for this study, allowing to investigate such phenomena by means of its spatial complexity. The sample consists of 120 set- tlements around the world, explored according to a set of 26 configurational variables (among qualitative and quantitative, both geometric and topological), compared to a group of 45 Por- tuguese medieval towns (representative of organic cities). Findings show that the favelas recog- nized spatial patterns are mostly common to those associated with organic structures. Despite being much denser and apparently labyrinthine shapes, the internal dynamics of the favelas reveal positive global relationships. These settlements behave similarly to consolidated urban systems and share common spatial logics throughout world regions and distinct cultures, fea- ture which allows recognizing the self-organization strategy as essential to their structural and survival process.info:eu-repo/semantics/publishedVersio

Experimental study of fragmentation products in the reactions 112Sn + 112Sn and 124Sn + 124Sn at 1 AGeV

Production cross-sections and longitudinal velocity distributions of the projectile-like residues produced in the reactions 112Sn + 112Sn and 124Sn + 124Sn both at an incident beam energy of 1 AGeV were measured with the high-resolution magnetic spectrometer, the Fragment Separator (FRS) of GSI. For both reactions the characteristics of the velocity distributions and nuclide production cross sections were determined for residues with atomic number Z $\geq$ 10. A comparison of the results of the two reactions is presented.Comment: 14 pages, 12 figure

ARPES Study of the Metal-Insulator Transition in Bismuth Cobaltates

We present an angle-resolved photoemission spectroscopy (ARPES) study of a Mott-Hubbard-type bismuth cobaltate system across a metal-insulator transition. By varying the amount of Pb substitution, and by doping with Sr or Ba cation, a range of insulating to metallic properties is obtained. We observe a systematic change in the spectral weight of the coherent and incoherent parts, accompanied by an energy shift of the incoherent part. The band dispersion also shows the emergence of a weakly dispersing state at the Fermi energy with increasing conductivity. These changes correspond with the changes in the temperature-dependent resistivity behavior. We address the nature of the coherent-incoherent parts in relation to the peak-dip-hump feature seen in cuprates superconductors

Auto-organização na informalidade: Os padrões socioespaciais na favela

O trabalho busca decodificar o sistema espacial da favela, enquanto entidade auto-organizada e espontânea, por meio do estudo comparativo com estruturas orgânicas. O propósito é discutir as favelas e seus processos espontâneos em áreas urbanas contemporâneas como similares a outros assentamentos auto-organizados. Adota-se como abordagem a Teoria da Lógica Social do Espaço e são comparados 120 assentamentos localizados ao redor do mundo, explorados segundo um conjunto de 26 variáveis configuracionais (entre qualitativas e quantitativas, geométricas e topológicas) com uma amostra de 45 cidades portuguesas de origem medieval (exemplares da cidade orgânica). Os achados revelam que a favela busca, na medida do possível, organizar-se dentro do sistema maior que a recebe, buscando conexões com a envolvente direta além de se estruturar internamente. A leitura configuracional aponta que emergem de suas relações espaciais padrões comuns aos que estruturam cidades orgânicas, distinguindo-se essencialmente em sua densidade extrema e grau de consolidação, apesar de revelarem boa estruturação global.info:eu-repo/semantics/publishedVersio

Effect of Sr substitution on superconductivity in Hg2(Ba1-ySry)2YCu2O8-d (part2): bond valence sum approach of the hole distribution

The effects of Sr substitution on superconductivity, and more particulary the changes induced in the hole doping mechanism, were investigated in Hg2(Ba1-ySry)2YCu2O8-d by a "bond valence sum" analysis with Sr content from y = 0.0 to y = 1.0. A comparison with CuBa2YCu2O7-d and Cu2Ba2YCu2O8 systems suggests a possible explanation of the Tc enhancement from 0 K for y = 0.0 to 42 K for y = 1.0. The charge distribution among atoms of the unit cell was determined from the refined structure, for y = 0.0 to 1.0. It shows a charge transfer to the superconducting CuO2 plane via two doping channels pi(1) and pi(2), i.e. through O2(apical)-Cu and Ba/Sr-O1 bonds respectively.Comment: 13 pages, 5 figures, accepted for publication in Journal of Physics: Condensed Matte

An Experimental Platform for Pulsed-Power Driven Magnetic Reconnection

We describe a versatile pulsed-power driven platform for magnetic reconnection experiments, based on exploding wire arrays driven in parallel [Suttle, L. G. et al. PRL, 116, 225001]. This platform produces inherently magnetised plasma flows for the duration of the generator current pulse (250 ns), resulting in a long-lasting reconnection layer. The layer exists for long enough to allow evolution of complex processes such as plasmoid formation and movement to be diagnosed by a suite of high spatial and temporal resolution laser-based diagnostics. We can access a wide range of magnetic reconnection regimes by changing the wire material or moving the electrodes inside the wire arrays. We present results with aluminium and carbon wires, in which the parameters of the inflows and the layer which forms are significantly different. By moving the electrodes inside the wire arrays, we change how strongly the inflows are driven. This enables us to study both symmetric reconnection in a range of different regimes, and asymmetric reconnection.Comment: 14 pages, 9 figures. Version revised to include referee's comments. Submitted to Physics of Plasma

Mapeamento genético de marcadores AFLP ligados ao gene de resistência do híbrido de timor à Hemileia vastatrix.

A ferrugem alaranjada do cafeeiro causada por Hemileia vastatrix é tida como a mais devastadora doença do cafeeiro. Este trabalho objetivou estudar a herança gênica e a identificação de marcadores moleculares ligados ao gene que confere resistência a esta doença. Para este estudo foram utilizados a população F2 (160 indivíduos), o retrocruzamento resistente (RCr, 20 indivíduos) e o suscetível (RCs, 135 indivíduos), derivados do cruzamento entre o Híbrido de Timor UFV 427-15, genitor resistente e o suscetível Catuai amarelo UFV 2143-236. A análise da segregação das populações, em estudo, indicou que um único gene dominante, presente no acesso do Híbrido de Timor UFV 427-15, é responsável pela resistência. Foram utilizadas as metodologias de BSA (Bulked Segregant Analysis) e AFLP, e analisadas 852 combinações de primers, que permitiram identificar três marcadores ligados ao gene de resistência localizados flanqueando ambos os lados, e distantes a 8.69, 20.50 e 25.10 cM. Estes são os primeiros marcadores identificados para o gene de resistência a ferrugem presente no Híbrido de Timor, e auxiliarão na seleção em programas de melhoramento para a resistência a ferrugem no Brasil