1,437 research outputs found
Introduction to ‘Planning Support Systems for Sustainable Urban Development’
No full textPlanning Support Systems (PSS) are geo-information-technology-based instruments that are dedicated to supporting those involved in planning in the performance of their specific tasks (Batty 1995; Klosterman 1997). The term PSS appeared on the planning scene in the mid-1980s thanks to its progenitor, Britton Harris, although the concept of building instruments dedicated to the support of planning activities dates back much further. In this first introductory chapter a brief demarcation of the concept of PSS will be provided, besides a concise overview of the content of this book on "Planning Support Systems for Sustainable Urban Development"
Using MapTable® to learn about sustainable development
No full textSustainable urban development is a critical issue in the Netherlands. The country is densely populated, which causes conflicts between environmental concerns and spatial development. Environmental policy integration is proposed as a way to improve the integration of environmental values into spatial planning with the help of learning processes. This chapter evaluates the extent to which the combination of a map-based touch table and an area-specific environmental profile are of added value to environmental policy integration. The case study is the application of the map-based touch table, called MapTable® for the development of a sustainable neighborhood in the region of Utrecht, the Netherlands. It was found that MapTable® facilitates learning processes by providing a platform for communication among stakeholders from different backgrounds. Nonetheless, it must be ensured that all stakeholders are equally included, and that the process suits the application of a map-based touch table in combination with an area-specific environmental profile
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Een semi-stocahstisch, multi-scale model voor tumorangiogenese
No full textIn dit verslag wordt een wiskundig model voor tumorangiogenese gepresenteerd. Daarnaast wordt een model voor de zuurstofconcentratie en een model voor de tumorgrootte gepresenteerd. De angiogenese wordt op microschaal gemodelleerd door de verplaatsing van de toppen van bloedvaten per tijdsstap te berekenen. De verplaatsing wordt bepaald door willekeurige groei, door een gradiënt angiogene factoren (chemotaxis) en door een gradiënt in stijfheid van het weefsel (mechanotaxis). Hierbij worden Brownse processen gebruikt om de willekeurige groei te modelleren, Greense functies als oplossing voor diffusievergelijkingen om de concentratie angiogene factoren en stijfheid van het weefsel continu te modelleren en stochastische processen om splitsing van bloedvaten te modelleren. Het model kan worden gebruikt om de angiogenese te visualiseren en om het effect daarvan op tumorgroei te simuleren. Het model voldoet aan de klinische observatie dat de tumorgrootte toeneemt tot de zuurstofconcentratie te laag is en pas verder toeneemt wanneer de tumor volledig gevasculariseerd is.Numerieke WiskundeTechnische WiskundeElectrical Engineering, Mathematics and Computer Scienc
De overgangszone rondom Utrecht : indeling en afbakening met behulp van de CBS-bodemstatistiek
No full text
Roughness Induced Boundary Layer Transition in Incompressible Flow
No full textThe fluid dynamics process leading to laminar-turbulent transition behind an isolated roughness element is investigated in the incompressible regime using particle image velocimetry. The study covers the effect of roughness size and geometry on the promotion of transition. The measurement domain covers a large streamwise range from the near wake to the onset of the turbulent regime. Planar PIV measurements reveal the basic flow pattern and the turbulent structure of the flow characterizing by the velocity fluctuation statistics (RMS of the streamwise and wall-normal velocity component and Reynolds shear stress). The high Reynolds shear stress level reaching the region near the wall in the downstream area indicates the onset of turbulent boundary layer
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