Streamlining river groynes: Laboratory experimentsin schematised geometry under submerged flow conditions

Groynes are hydraulic structures commonly applied in the Dutch rivers. Depending on the water depth, groynes can be emerged or submerged. When a groyne is emerged, it has two main functions: maintaining the water depth in the main channel and preventing the river from eroding its bank. When the discharge in the river increases, the groynes...

Enhancing Desirable Food Behaviors by Increasing or Decreasing Disgust: Designing and Testing Infographics

For health and environmental reasons, humanity should reduce the consumption of animal-based products, whereas vegetable consumption should be increased. We created stimuli (drawings with texts) that may be able to increase or decrease the purchasing of mushrooms, cheese, and meat. During the design process, we identified four aspect...

The Impact of the Inclusion of Social Dimensions on Decision-Making in the Dutch Heat Transition: an Empirical Study

We find ourselves at a crossroads; without immediate and deep emissions reductions, limiting global warming to 1.5 degrees Celsius will be impossible. For the Netherlands to achieve its climate targets, Dutch municipalities have been delegated the crucial task of the heat transition. Prior research reveals that the Dutch energy transition and...

An Experimental Investigation of the Operating Characteristics of a Flameless Combustor

This thesis covers the experimental characterisation of a multi-nozzle research combustor capable of achieving flameless combustion (FC). The combustor is operated with methane as fuel and air as the oxidiser, under an overall lean equivalence ratio ranging from 0.6-0.9. The work focused on designing and applying different experimental...

A Unified Model to Predict Excited State Cyclicity of Nitrogen Vacancy Centres in Diamond

Crucial to the behaviour of a Nitrogen-Vacancy (NV) centre are its excited state cyclicities, determining the ability to perform high fidelity readout, spin-photon entanglement generation or fast spinpumping. This work presents a unified model to predict these excited state cyclicities over a wide range of strain, electric field, magnetic field...

Laboratory study on the efficiency of water injection dredging: An analysis on the influence of different dredge settings on the density current and production rate

The Port of Rotterdam experiences large amounts of siltation from the upstream rivers in its basins and canals every year. Furthermore, container vessels increase in size every decade and therefore require a larger navigational depth. These two factors cause the yearly amount of dredged material to increase. Currently, mainly trailing suction...

Pile Dredging in Cohesive Soils: Experimental research on the influence of different dredging configurations

After decades of exploitation of hydrocarbons, the offshore facilities constructed for this purpose are nearing the end of their design life and/or economic operation. According to international law, these offshore structures need to be completely removed. Decommissioning of the substructures often requires for soil to be removed in piles to...

Vibrations In An Active Controlled Hexapod

The Ampelmann system occasionally starts vibrating unexpectedly, especially while the system is placed on a pedestal. These vibrations are believed to be caused by the eigenfrequencies of the system and/or amplification caused by the motion control algorithm. In this research an investigation in this phenomenon was done. This investigation was...