The effect of asphalt maintenance regimes on inflation correction in Dutch DBFM contracts

Inflation is a worldwide phenomenon that influences future investment decisions. Inflation is the devaluation of money, causing a reduction of purchasing power and price level rise. Nobody knows how high inflation will be, and thus price levels in the future a uncertain. In long-term projects with expenses in the future, it is important to take...

Automated launch, landing and storage of a kite power system

The Kite Power Group of the Wind Energy Department of Delft University of Technology has developed a pumping kite system to harvest high altitude wind energy (HAWP). HAWP technology is one of many renewable energy solutions that are emerging in a time at which Earth’s non-renewable energy resources are becoming scarce. The kite power system...

Development and embodiment of a lightweight inflatable tent series

Dutch outdoor brand ‘Nomad’ has initiated in the past the development of inflatable tent poles, so called air beams. This near to be finished air beam technology is separately developed and is currently not yet implemented in a tent design of the (future) portfolio of Nomad. The goal is to have tents implemented with air beams for the collection...

The design of a smart inflatable vest for children with sensory processing disorder

During the last decade, the development of technologies is changing the meaning of technology in our daily life. The development of intelligent products immerses us in technology and therefore it no longer stands in the background. This ubiquitous technology and new smart computing systems interact with humans and become more than just context...

Pressure adaptive honeycomb: A new adaptive structure for aerospace applications

A new type of adaptive structure is presented that relies on pressurized honeycomb cells that extent a significant length with respect to the plane of the hexagons. By varying the pressure inside each of the cells, the stiffness can be altered. A variable stiffness in combination with an externally applied force field results in a fully embedded...

Inflation Targeting: A Reconsideration

In response to the abandonment of monetary targeting, Inflation targeting (IT) has emerged as a dominant monetary policy framework in both industrializing and industrialized countries. The framework was aimed to provide a new anchor for conducting monetary policy, and the theoretical underpinnings of this framework are based on two things: First...

Pressure adaptive honeycomb: A new adaptive structure for aerospace applications

A new type of adaptive structure is presented that relies on pressurized honeycomb cells that extent a significant length with respect to the plane of the hexagons. By varying the pressure inside each of the cells, the stiffness can be altered. A variable stiffness in combination with an externally applied force field results in a fully embedded...

Development of a generic inflatable de-orbit device for CubeSats

New space debris mitigation guidelines require satellites in low Earth orbit to de-orbit within 25 years after end of life. This effectively limits the orbital altitude of conventional CubeSat satellites to 400-700 km. For CubeSats employing the generic inflatable de-orbit device discussed here, this range is extended to 910 km by increasing the...

Design and Analysis Methodologies for Inflated Beams

The central theme of the thesis is bending behaviour of inflated beams. Three different types of beams have been analysed for the bending load case: a straight cylindrical beam made of anisotropic foil material, a conical beam made of an isotropic foil material, and a carbon fibre braided beam. The last two types have been optimised for minimum...

Reliability assessment of Powersea in predicting the motions of a rigid inflatable boat during a wake crossing

Klotsen in een balgstuw: Een mathematisch model voor het klotsen in een balgstuw

In Ramspol, tussen het Ketelmeer en het Zwarte Meer, wordt een balgstuw gerealiseerd. Dit is een constructie die bestaat uit een rubberen balgdoek ingeklemd in een betonnen drempel, die gevuld wordt met lucht en/of water. De balgstuw bij Ramspol wordt een van de grootste ter wereld en een ander bijzonder punt is dat de vulling bestaat uit een...

Hydraulic aspects of the dimensioning of geosystems

Oppompbare rubberdam: Verslag van de proeven

Schaalproeven op een opblaasbare kering (Fabridam).