Wayfinding : a simple concept, a complex process

Wayfinding is the process of finding your way to a destination in a familiar or unfamiliar setting using any cues given by the environment. Due to its ubiquity in everyday life, wayfinding appears on the surface to be a simply characterised and understood process, however this very ubiquity and the resulting need to refine and optimise wayfinding has lead to a great number of studies that have revealed that it is in fact a deeply complex exercise. In this paper we examine the motivations for investigating wayfinding, with particular attention being paid to the unique challenges faced in transportation hubs, and discuss the associated principles and factors involved as they have been perceived from different research perspectives.We also review the approaches used to date in the modelling of wayfinding in various contexts. We attempt to draw together the different perspectives applied to wayfinding and postulate the importance of wayfinding and the need to understand this seemingly simple, but concurrently complex, process.

Macropores generated during shrinkage in two paddy soils using X-ray micro-computed tomography

Soil shrinkage curve represents a decrease of total porosity or an increase of bulk density with water loss. However, our knowledge of the dynamics of pores and their geometry during soil shrinkage is scarce, partially due to lack of reliable methods for determining soil pores in relation to change in soil water. This study aimed to investigate the dynamics of macropores (>30 mu m) of paddy soils during shrinkage. Two, paddy soils, which were sampled from one paddy field cultivated for 20 years (YPF) and the other one for over 100 years (OPF), represented difference in crack geometry in the field. Macropore parameters (volume, connectivity, and orientation of pores) and soil shrinkage parameters were determined on the same undisturbed soil cores by X-ray microtomography and shrinkage curve, respectively. Macroporosity was on average four times larger in the YPF than in the OPF whereas the shrinkage capacity was lower in the YPF as compared to the OPF (0.09 vs. 0.15 COLE). Soil shrinkage increased the volume of pores by 3.7% in the YPF and by 1.6% in the OPF as well as their connectivity. The formation of macropores occurred mostly in the proportional shrinkage phase. As a result, the slope of the proportional shrinkage phase was smaller in the YPF (0.65) than in the OPF (0.89). New macropores were cracks and extended pre-existing pores in the range of 225-1215 pm size without any preferential orientation. This work provides image evidences that in paddy soils with high shrinkage capacity more macropores are generated in the soil presenting a smaller proportional shrinkage slope. (C) 2015 Elsevier B.V. All rights reserved.

A nobreza doutural da bruzundanga: Profissionais liberais e fetiche do coutoramento no Brasil

Analisa-se, a partir da obra Os Bruzundangas (1922) de Lima Barreto, o fascínio brasileiro pelo título de doutor, e a necessidade de ostentá-lo demonstrada por alguns profissionais liberais. Inicialmente, sintetiza-se a obra limabarretiana, enfatizando-se o tratamento e a sátira feita pelo autor aos doutores e à doutorice dos anos 1910. Em seguida, discute-se a construção histórica da associação entre o título e o valor social do poder e do prestígio, destacando, de um lado, a tradição lusitana do bacharelismo, e, de outro, a bacharelização promovida por D. Pedro II. Discorre-se, então, acerca das tentativas contemporâneas de apropriação e/ou manutenção do doutoramento pelos advogados, juízes, médicos e outros profissionais de saúde. Por fim, aborda-se a problemática do ponto de vista discursivo, levantando-se algumas questões linguísticas e ideológicas envolvidas.