2,404,667 research outputs found
Youthhood
No full textTESTING-GROUND issue 03, Youthhood, examines worlds through youthful eyes, makes evident young ambitions, and questions how we can better empower young people to design cities, landscapes, and a planet that works for them. The issue includes contributions from: Carmel Keren, Jude Daniel Smith, Claire Edwards, Kazeem Kuteyi, Emmanuel Adarkwah, Reza Nik, Dan Cui, Kristofer Cullum-Fernandez, Fida Sassi, Simeon Shtebunaev, Daze Aghaji, Averill Dimabuyu, Sarri Elfaitouri, Rebecca McDonald-Balfour, and Ed Wall.
Rebecca McDonald-Balfour (Author), Jude Daniel Smith (Author), Daze Aghaji (Author), Carmel Keran (Author), Alexis Liu (Author), Dan Cui (Author), Kristofer Cullum-Fernandez (Author), Fida Sassi (Author), Averill Dimabuyu (Author), Ed
Protecting Animals 24: Martin Dingle Wall
No full textThis episode of Knowing Animals is part of the Protecting Animals series. I am lucky to be joined by actor, producer and writer Martin Dingle Wall. Martin has appeared in many Australian series including Home and Away, Underbelly and Upper Middle Bogan. Martin now lives in LA and recently stared in the indie hit movie Happy Hunting. Martin is also a passionate animals and regularly uses his profile to raise animal issues
Turbulent plane Couette flow with wall-transpiration
No full textIn the present abstract, DNS results obtained for turbulent plane Couette flow with wall-normal transpiration velocity are presented. Important equations valid in such a flow are derived, describing the total shear stress and the relation between the friction velocities at the lower and upper wall. These expressions are of importance, as there are neither experimental nor DNS data to compare with. Equally important, we derive a center region and a viscous sublayer velocity scaling for the suction wall, which were both validated using the DNS data
Post-landscape or the potential of other relations with the land
No full textHave we reached a post-landscape condition? Have prevailing visual relations between people and land, exemplified by English traditions of pictorial settings, individual perspectives and enclosed properties, reached a conclusion? Has a particular frame of landscape, which Denis Cosgrove describes as a ‘way of seeing’ (1985, 45), come to a close? Conceptions of landscape, that emerged in fifteenth- and sixteenth-century England and that have continued to be reinforced through contemporary architectural representations and designed transformations, package landscapes as scenic backgrounds and frame tracts of land as spatial products. While referring to these dominant relationships with the land, Barbara Bender reminds us that there are many other ways of conceiving of landscapes: ‘when the word “landscape” was coined and used to its most powerful effect, there were, at the same time and the same place, other ways of understanding and relating to the land – other landscapes’ (1993, 2). What she describes as contrasting, and often contradictory, constructs of landscape, defined through individual and societal relations with our environments, have grown and receded in relevance. Landscapes are defined through specific economic, social and spatial contexts. So while dominant pictorial ideas of landscape may endure for some people in countries influenced by Anglo-Saxon traditions, other landscapes are configured through contrasting material, ecological, cultural and symbolic relationships with land. In this chapter I explore two inseparable contemporary London landscapes, Paternoster Square and the Occupy London Stock Exchange (LSX). I question a continuation of these English landscape traditions that embrace: predominantly visual approaches; scenes considered from static positions; and singular perspectives framed as representations and urban spaces, enclosed and transformed through design. Raymond Williams proposes:
It is possible and useful to trace the internal histories of landscape painting, landscape writing, landscape gardening and landscape architecture, but in any final analysis we must relate these histories to the common history of a land and its society. And if we are to understand changes in English attitudes to landscape, in the eighteenth and nineteenth century, this is especially necessary. (Williams, 1973, 120
Turbulent separation in lower curved wall channels
No full textTurbulent boundary layer separation in channels with a lower curved wall is studied using direct numerical simulations (DNS). Turbulence dynamics are studied through classical statistical tools such as the turbulent kinetic energy budget for varying lower curved wall dimensions. The geometry features are expected to have a significant effect on the fluid flow structures and the characteristic scales of separation. The separation bubble behind the bump is studied in terms of its size, turbulent kinetic energy production mechanisms and transfer and scale-by-scale energy budget. New innovative data-analysis techniques will be used based on the generalisation of the Kolmogorov equation to anisotropic and spatially non-homogeneous flow configurations
The influence of subgrid-scale modelling on the performance of a new non-equilibrium wall-model for large-eddy simulation
No full textThe computational cost of wall-resolved large-eddy simulations (LES) rapidly becomes prohibitive with increasing Reynolds number. Wall-modelled LES attempts to significantly reduce the computational cost of simulating wall-bounded turbulent flows by modelling the effect of the near-wall small-scale motions, rather than fully or partially resolving them. The present study concentrates on a new wall-model that is able to predict fluctuating wall-shear stress given a large-scale velocity input. The velocity input for the model is affected by the choice of subgrid-scale (SGS) model. Therefore, this study also focusses on the impact of the SGS-model on the distribution of quantities at the wall. Results show that the new wall-model is able to resolve more of the wall shear-stress variance than a standard wall-model; and that the SGS-model affects the distribution of fluctuations of both wall-shear stress and wall-pressure
Working with uncertainties: living with masterplanning at Elephant and Castle
No full textUncertainty is a condition inherent to all landscapes. Despite the availability of large sets of data, the capacity of digital processing, and expanded representational techniques, relations between people and land can remain ambiguous. Practices of mapping and masterplanning mediate specific landscape relations through traditions of surveying land, claiming ownership, and controlling change—practices that include claims to comprehensive knowledge in tension with partialities, omissions, and uncertainties. They are both ways of reconstructing relationships that people have with places, devices that can transform how people see and live their worlds. In this chapter I focus on uncertainties in mapping and masterplanning, exploring the opportunities and difficulties caused by partial decisions and selective omissions in the construction of maps and masterplans. Despite claims to complete knowledge (mapping) or comprehensive redevelopment (masterplanning) both practices frame specific arguments and selectively exclude information, impacting the lives of individuals, communities, and organisations. The focus of this research is the Elephant and Castle area of South London. I reveal how politicians, planners, and developers benefited from uncertainty caused during prolonged masterplanning processes while the daily lives of residents and workers were severely undermined. I also identify how long-established forms of belonging were broken by large-scale and drawn out planning processes. In contrast, I find that practices of collective mapping offer potential to generate shared knowledge of neighbourhoods and strengthen senses of belonging. However, while such inclusive practices can highlight the injustices of urban development the imbalances of power that are bound up with such large scales of masterplanned urban change result in overwhelming and unrelenting disruption to homes and lives. Many residents and traders were denied the right to belong to Elephant and Castle while simultaneously their ownerships, leaseholds, tenancies, and licenses to live and work were taken away
Unsteady particle accumulation in wall turbulence
No full textWe propose the asymptotic theory of unsteady accumulation of inertial particles in the viscous sublayer of wall-bounded turbulent flow. We derive the diffusion equation for the particle concentration in the viscous sublayer and find the self-similar exact solution of this equation at large times. It is shown that near the wall the maximal concentration grows as the square root of time, while the distance from the wall to the concentration pike as well as its width decay as inverse square root of time. The obtained solution is corroborated by the results of stochastic Lagrangian simulations
Concrete Flow in Diaphragm Wall Panels: A Full-Scale In-Situ Test
No full textFlow processes, taking place during the concreting of diaphragm wall panels (D-wall panels), are of great importance for the quality of the wall. During this phase, the bentonite, present in the excavated trench, should be completely replaced by concrete in a controlled way. In literature several cases are described in which this process resulted in bentonite inclusions in the panel. These inclusions often lead to severe problems, like leakages, for the building pit to be excavated within the diaphragm wall panels. Beside the risks for the building pit, leakages caused by bentonite inclusions can also have large consequences for nearby constructions. In this article, set up and results of a full-scale diaphragm wall test are described. Conclusions are drawn with regard to the influence of several parameters on the flow process and subsequently on the quality of the wall and the risk on bentonite inclusions
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