Multilevel Iterative Methods and Deflation

In this paper, we show that the deflation method can be viewed as a possible implementation of the CG method with multilevel preconditioner. Further, we demonstrate efficiency and robustness of different implementations of multilevel preconditioners with different "coarse grid" spaces by solving a simple model problem.

Selective recovery of micrometer bioparticles using aggregation and air flotation

Air flotation is a separation technique that makes use of the air-water interface for separation of particles and molecules from mixtures. This thesis discusses its use for separation of bioparticle mixtures. Particulate bioproducts, such as crystals, inclusion bodies, virus-like particles and precipitates, can be produced inside microbial cells...

Three-dimensional Ising model confined in low-porosity aerogels: A Monte Carlo study

Aggregate extraction: A review on the effect of ecological functions

The expected major increase in marine aggregate extraction in the future will increase the spatial and temporal environmental impacts. Coastal zone management and interdisciplinary surveys and assessments will become increasingly important in order to minimise impacts of largescale sand mining on marine resources and to resolve conflicts against...

Detergency in Liquid CO2

In this dissertation we study Detergency in liquid Carbon Dioxide. Detergency is the cleaning performance of additives, surfactants in particular, in washing fluids. Liquid CO2 is under consideration, for environmental and toxicological reasons, to replace perchloro-ethylene as the solvent in textile dry cleaning technology. Inherent problems of...

Application of construction and demolition waste

The Methylene Blue adsorption test applied to geomaterials

Review of the application of the Methylene Blue adsorption test (titration spot method) applied to geomaterials (soils and rocks). With this method the Cation Exchange Capacity (CEC) of fine soils or fine grounded rock powder can be determined. Swelling clays have a high CEC and even small quantities (less than 1 mass % can be detected by this...

An Experimental Study of Shear Fracture and Aggregate Interlock in Cementbased Composites

In the present paper the results of an exploratory study with the recently developed biaxial tension/shear apparatus of the Stevin Laboratory of Delft University of Technology are presented. The apparatus is unique in the sense that square double-edgenotched concrete plates up to a size of 200 x 200 mm can be loaded in any combination of tension...

Determination of particle aggregation in ultrafine silicon nitride powders

An Engineering Geological Classification of Limestone Material; Memoirs of the Centre for Engineering Geology in the Netherlands No. 49

In engineering practice there exists no complete classification for pure limestone material. Although there are a number of classification systems, which rely on useful parameters, the problem is that there are no indications of quality regarding the requirements of the various engineering disciplines. In order to develop a classification system...