Liquid Gold

Masteroppgave Interiørarkitektur og møbeldesign, Avdeling Desig

Surface Modification of AMH-3 for Development of Mixed Matrix Membranes

AMH-3 layered silicate is chosen for this study as its 3D structure with crystallographic pore size of 3.4 Å makes it an attractive material for gas separation applications. AMH-3 layered silicate was synthesized via hydrothermal synthesis method and then functionalized using octyl(methyl)dimethoxysilane to enhance its hydrophobicity for good adhesion and dispersion in mixed matrix membrane. In this work, high permeability polysulfone (PSf) was incorporated with AMH-3 for fabrication of mixed matrix membranes. The critical polymer concentration of PSf was studied to suppress the formation of macrovoids in mixed matrix membranes. Flat sheet PSf/AMH-3 membranes were then prepared by dry/wet phase inversion technique with different loadings of AMH-3 in PSf matrix. The synthesized AMH-3 layered silicate is verified by FT-IR and XRD analysis. Structural changes of AMH-3 after functionalization are observed in FT-IR, XRD and SAP analysis. Functionalized AMH-3 shows higher surface area and reduced pore size. The MMMs of pristine and functionalized AMH-3 have similar surface and cross-sectional morphologies, showing good distribution and dispersion of inorganic filler. AMH-3 shows improved hydrophobicity after functionalization, resulting in better adhesion and compatibility with polysulfon

Integrating Segmentation and Paging Protection for Safe, Efficient and Transparent Software Extensions

The technological evolution towards extensible software architectures and component-based software development demands safe, efficient, flexible, and easy-touse extension mechanisms to provide protection among software modules residing in the same address space. While a number of software-based approaches have been proposed in the last several years, no clear winner emerges that satisfactorily addresses all the design issues involved in establishing multiple protection domains within an address space. This paper describes the design, implementation, and evaluation of a novel intra-address space protection mechanism called Palladium, which is built upon the combined segmentation and paging protection hardware provided by Intel's X86 architecture. Based on the considerations on application programming and systems implementation complexity, we chose to use slightly different approaches to implement the user-level and kernel-level extension mechanisms. To demonstrate the resulting prototyp..

High-capacity exponential associative memories

A generalized associative memory model with potentially high capacity is presented. A memory of this kind with M stored vectors of length N, can be implemented with M nonlinear neurons, N ordinary thresholding neurons, and 2MN binary synapses. It is shown that special cases of this model include the Hopfield and high-order correlation memories. A special case of the model, based on a neuron which can implement the subthreshold region, is presented. The authors analyze the capacity of this exponentially associative memory and show that it scales exponentially with N. In any practical realization, however, the dynamic range of the exponentiators is constrained. They show that the capacity for networks with fixed dynamic range exponential circuits is proportional to the dynamic range