Quality of design and usability: a vitruvian twin

This paper explores different indicators of quality of architectural design that are used in debates and design appraisals in the Netherlands. In addition to the old Vitruvian trilogy of utilitas, firmitas and venustas a plea is made for a broad view on quality of architectural design. Because buildings go far beyond “free art”, in particular...

Health performance of housing: Indicators and tools

Occupants in air-tight houses and with poorly maintained mechanical ventilation systems have stimulated the study of health hazards of housing. Five hundred houses were inspected, to diagnose the relation between lay-out, construction, technical services, interior decorations and potential indoor air pollution or problems with noise and safety....

On the use of slope limiters for the design of recovery based error indicators

Gradient recovery techniques for the design of a posteriori error indicators are reviewed in the context of fluid dynamic problems featuring shocks and discontinuities. An edgewise slope limiting approach tailored to linear finite element discretizations is presented. The improved gradient values at edge midpoints are recovered as the limited...

Analysis of finite element methods for coupled Hydro-Mechanical problems

This work is concerned with the analysis of a non-stationary Hydro-Mechanical problem. The well-posedness of the continuous, time semi-discretized and fully discretized problems is addressed. An a posteriori error analysis is performed, leading to a family of space-time error indicators. The reliability of this family, i.e. a global upper bound...

KWELDERS EN SCHORREN in de Kaderrichtlijn Water: Ontwikkeling van Potentiële Referenties en van Potentële Goede Ecologische Toestanden / SALT MARSHES in the Water Framework Directive: Development of Potential Reference Conditions and of Potential Good Ecological Statuses

THIS ENTRY CONTAINS BOTH A DUTCH AND AN ENGLISH VERSION. FOR THE ENGLISH SUMMARY SCROLL DOWN. Ten behoeve van de maatlatontwikkeling voor de handhaving van de Europese Kaderrichtlijn Water worden in dit document twee parameters ontwikkeld voor de Nederlandse kwelders en schorren: 1. een areaal-referentie. De KRW gaat uit van een areaal...

Analysis of the response of phytoplankton indicators in Dutch coastal waters to nutrient reduction scenarios: A model study with the Generic Ecological Model (GEM)

Health performance evaluation of housing

Ecologische indicators voor toxische stress in watersystemen

Graadmeters voor de Noordzee

Als resultaat van een aantal jaren (1996-1999) met nuttige discussies tussen wetenschappers, beleidsmakers en bestuurders over het ontwikkelen van ecologische indicatoren voor een efficiënt beheer van het Nederlands deel van het continentale plat van de Noordzee (NCP), is de eerste set van werkende indicatoren uiteindelijk ontwikkeld. Dit...

Kwalitatieve analyse en beoordeling van effecten van maatregelen op doelsoorten van zoete rijkswateren

Results of MLS procedural interception flight trials performed at Manchester Airport

In July, 1988, flight trials have been performed on the newly installed MLS equipment at Manchester Airport (UK), using one of the laboratory aircraft of NLR, a Fairchild Metro II with programmable avionics systems including a basic MLS receiver as an "Avionics Research Testbed". The aim of the tests was to prove that aircraft with basic IFR...

Aspects of second- and third-order panel methods demonstrated for the two-dimensional flat plate problem

Characteristics of three second-order and two third-order panel method formulations for the incompressible flow about a flat plate at incidence are investigated. The second order methods employ quadratic representations for the doublet distribution, either based on quadratic B-splines or on a combination of a Taylor series expansion and finite...