Sensing Landscape History with an Interactive Location Based Service

This paper introduces the STEAD approach for interpreting data acquired by a “human sensor”, who uses an informal interactive location-based service (iLBS) to sense cultural-historic facts and anecdotes of, and in the landscape. This user-generated data is collected outdoors and in situ. The approach consists of four related facets (who, what, where, when). Three of the four facets are discussed and illustrated by user generated data collected during a Dutch survey in 2008. These data represent the personal cultural-historic knowledge and anecdotes of 150 people using a customized iLBS for experiencing the cultural history of a landscape. The “who” facet shows three dominant mentality groups (cosmopolitans, modern materialists and post modern hedonists) that generated user content. The “what” facet focuses on three subject types of pictures and four picture framing classes. Pictures of the place type showed to be dominant and foreground framing class was slightly favourite. The “where” facet is explored via density, distribution, and distance of the pictures made. The illustrations of the facets indirectly show the role of the “human sensor” with respect to the domain of interest. The STEAD approach needs further development of the when-facet and of the relations between the four facets. Finally the results of the approach may support data archives of iLBS applications

Stability analysis of a class of two-dimensional multipolar vortex equilibria

Published versio

Control of human endometrial stromal cell motility by PDGF-BB, HB-EGF and trophoblast-secreted factors

Human implantation involves extensive tissue remodeling at the fetal-maternal interface. It is becoming increasingly evident that not only trophoblast, but also decidualizing endometrial stromal cells are inherently motile and invasive, and likely contribute to the highly dynamic processes at the implantation site. The present study was undertaken to further characterize the mechanisms involved in the regulation of endometrial stromal cell motility and to identify trophoblast-derived factors that modulate migration. Among local growth factors known to be present at the time of implantation, heparin-binding epidermal growth factor-like growth factor (HB-EGF) triggered chemotaxis (directed locomotion), whereas platelet-derived growth factor (PDGF)-BB elicited both chemotaxis and chemokinesis (non-directed locomotion) of endometrial stromal cells. Supernatants of the trophoblast cell line AC-1M88 and of first trimester villous explant cultures stimulated chemotaxis but not chemokinesis. Proteome profiling for cytokines and angiogenesis factors revealed neither PDGF-BB nor HB-EGF in conditioned media from trophoblast cells or villous explants, while placental growth factor, vascular endothelial growth factor and PDGF-AA were identified as prominent secretory products. Among these, only PDGF-AA triggered endometrial stromal cell chemotaxis. Neutralization of PDGF-AA in trophoblast conditioned media, however, did not diminish chemoattractant activity, suggesting the presence of additional trophoblast-derived chemotactic factors. Pathway inhibitor studies revealed ERK1/2, PI3 kinase/Akt and p38 signaling as relevant for chemotactic motility, whereas chemokinesis depended primarily on PI3 kinase/Akt activation. Both chemotaxis and chemokinesis were stimulated upon inhibition of Rho-associated, coiled-coil containing protein kinase. The chemotactic response to trophoblast secretions was not blunted by inhibition of isolated signaling cascades, indicating activation of overlapping pathways in trophoblast-endometrial communication. In conclusion, trophoblast signals attract endometrial stromal cells, while PDGF-BB and HB-EGF, although not identified as trophoblast-derived, are local growth factors that may serve to fine-tune directed and non-directed migration at the implantation site

The Making of the London Notting Hill Carnival Festivalscape: Politics and Power and the Notting Hill Carnival

This paper examines the role of politics and power in the Notting Hill Carnival's evolution from a community festival to a hallmark event and tourism product. It overcomes the limitations of previous event/festival tourism research by utilizing Actor Network Theory's conceptualization of power as an evolving, relational and transformational phenomenon to analyse the development of the Notting Hill Carnival's festivalscape. Findings reveal over its fifty-plus-year history, non-human actors (such as, money) and human actors (such as, organizing committees) have engaged in continuous ordering processes that have led to the development of six distinct festival frames - Community Festival, Trinidad Carnival, Caribbean Carnival, Black Arts Festival, Business Opportunity and City-led Hallmark Festival. These changes have taken place within a festivalscape that includes objects, space, the translation process, pivotal events and dissenting actors. Within the festivalscape, political actors have exerted significant influence due to their asymmetrical power creating challenges for festival organizers

Analytical solutions for distributed multipolar vortex equilibria on a sphere

Published versio

Taking into account sensory knowledge: the case of geo-techologies for children with visual impairments

This paper argues for designing geo-technologies supporting non-visual sensory knowledge. Sensory knowledge refers to the implicit and explicit knowledge guiding our uses of our senses to understand the world. To support our argument, we build on an 18 months field-study on geography classes for primary school children with visual impairments. Our findings show (1) a paradox in the use of non-visual sensory knowledge: described as fundamental to the geography curriculum, it is mostly kept out of school; (2) that accessible geo-technologies in the literature mainly focus on substituting vision with another modality, rather than enabling teachers to build on children's experiences; (3) the importance of the hearing sense in learning about space. We then introduce a probe, a wrist-worn device enabling children to record audio cues during field-trips. By giving importance to children's hearing skills, it modified existing practices and actors' opinions on non-visual sensory knowledge. We conclude by reflecting on design implications, and the role of technologies in valuing diverse ways of understanding the world

Religions, Poverty Reduction and Global Development Institutions

Religious traditions have always played a central role in supporting those experiencing poverty, through service delivery as well as the provision of spiritual resources that provide mechanisms for resilience at both the individual and community level. However, the fact that religions can be seen to support social structures and practices that contribute towards inequality and conflict, also underscores a role for religious traditions in creating conditions of poverty. While the Western-led modern global development institutions that have emerged since the Second World War have tended to be secular in nature, over the past decade or so there has been an apparent ‘turn to religion’ by these global development institutions, as well as in academic development studies. This reflects the realization that modernization and secularization do not necessarily go together, and that religious values and faith actors are important determinants in the drive to reduce poverty, as well as in structures and practices that underpin it. This paper traces three phases of engagement between religions and global development institutions. In phase one, the ‘pre-secular’ or the ‘integrated phase’ seen during the colonial era, religion and poverty reduction were intimately entwined, with the contemporary global development project being a legacy of this. The second phase is the ‘secular’ or the ‘fragmented’ phase, and relates to the era of the global development industry, which is founded on the normative secularist position that modernization will and indeed should lead to secularization. The third phase is characterized by the ‘turn to religion’ from the early 2000s. Drawing the three phases together and reflecting on the nature of the dynamics within the third phase, the ‘turn to religion’, this paper is underpinned by two main questions. First, what does this mean for the apparent processes of secularization? Is this evidence that they are being reversed and that we are witnessing the emergence of the ‘desecularization of development’ or of a ‘post-secular development praxis’? Second, to what extent are FBOs working in development to be defined as neo-liberalism’s ‘little platoons’—shaped by and instrumentalized to the service of secular neo-liberal social, political and economic systems, or do we need to develop a more sophisticated account that can contribute towards better policy and practice around poverty reduction