Natuurcompensatie A50 (Eindhoven-Oss) : een oriënterend onderzoek

VakpublicatieInstitute of Environmental Science

Milieu-effect studie bouwlokaties Leidse regio : de effecten van nieuwe woningbouwlokaties en bedrijfsterreinen in de Leidse regio op natuur en milieu

VakpublicatieInstitute of Environmental Science

Met oevers meer natuur : op zoek naar referentiebeelden en maatregelen voor aanleg, inrichting en beheer van natuurvriendelijke oevers

VakpublicatieInstitute of Environmental Science

A travel time-based variable grid approach for an activity-based cellular automata model

Urban growth and population growth are used in numerous models to determine their potential impacts on both the natural and the socio-economic systems. Cellular automata (CA) land-use models became popular for urban growth modelling since they predict spatial interactions between different land uses in an explicit and straightforward manner. A common deficiency of land-use models is that they only deal with abstract categories, while in reality, several activities are often hosted at one location (e.g. population, employment, agricultural yield, nature…). Recently, a multiple activity-based variable grid CA model was proposed to represent several urban activities (population and economic activities) within single model cells. The distance-decay influence rules of the model included both short- and long-distance interactions, but all distances between cells were simply Euclidean distances. The geometry of the real transportation system, as well as its interrelations with the evolving activities, were therefore not taken into account. To improve this particular model, we make the influence rules functions of time travelled on the transportation system. Specifically, the new algorithm computes and stores all travel times needed for the variable grid CA. This approach provides fast run times, and it has a higher resolution and more easily modified parameters than the alternative approach of coupling the activity-based CA model to an external transportation model. This paper presents results from one Euclidean scenario and four different transport network scenarios to show the effects on land-use and activity change in an application to Belgium. The approach can add value to urban scenario analysis and the development of transport- and activity-related spatial indicators, and constitutes a general improvement of the activity-based CA model

High-resolution simulations of population-density change with an activity-based cellular automata land-use model

The MOLAND model is a cellular automata (CA) land-use change model that has often been applied to simulate urban growth. A more recent alternative model makes the simulations more multifunctional by also computing different activities (population and employment) for every cell. However, the equation to update population density in time in this activity-based CA model could not deal with high population growth rates in some existing urban centres. Therefore, we experimented with two alternative equations. A semi-automated calibration routine was used to compare errors of the different model versions at a continuous range of resolutions in two study areas: the Greater Dublin Region, Ireland, and Flanders and Brussels, Belgium. The two new population density equations turn out to solve the particular problem of fast changes in high-density neighbourhoods and generally improve regional errors in the Belgian application, but can unfortunately introduce larger errors in low-density areas or in the land-use simulations

Solid state protein monolayers: morphological, conformational, and functional properties

We have studied the morphological, conformational, and electron-transfer (ET) function of the metalloprotein azurin in the solid state, by a combination of physical investigation methods, namely atomic force microscopy, intrinsic fluorescence spectroscopy, and scanning tunneling microscopy. We demonstrate that a “solid state protein film” maintains its nativelike conformation and ET function, even after removal of the aqueous solvent

Mitigerende en compenserende maatregelen aan het hoofdwegennet voor het bevorderen van natuurwaarden

VakpublicatieInstitute of Environmental Science

An amicyanin C-terminal loop mutant where the active-site histidine donor cannot be protonated

Protein Chemistry - OU

The effect of pH and ligand exchange on the redox properties of blue copper proteins

Macromolecular Biochemistr

De kwetsbaarheid van natuur en landschap voor versnippering door verkeer en infrastructuur : een studie in opdracht van de Dienst Weg- en Waterbouwkunde (Rijkswaterstaat)

Wetensch. publicatieInstitute of Environmental Science