Electronic knowledge repositories (EKR) are the most common form of knowledge management system implemented by organizations. After inception, some EKRs become self-sustaining successes but others atrophy from lack of use. The literature has identified multiple factors that contribute to the success or ultimate demise of EKRs, such as incentives, system capability, and management promotion. How...

The study of intersection theorems for set systems was started in the papers of [BE 1] and [EKR 1] . In the last twenty years a fairly extended theory has developed, several survey papers [EK 1], [K] were written . There is also a forthcoming book [FFK 1] about extremal problems of set systems . Intersection theorems of structural type started in the papers of [SS 1] were followed by several ot...

In the classical world, the XOR of pseudorandom permutations Ek1 ⊕ · · · ⊕ Ekr for r ≥ 2 is a well-established way to design a pseudorandom function with “optimal” security: security up to approximately min{|K|, |X|} queries, where K and X are the key and state space of the block cipher E. We investigate security of this construction against adversaries who have access to quantum computers. We ...

The problems we study in this thesis arise in computer science, extremal set theory and quantum computing. The first common feature of these problems is that each can be reduced to characterizing the independent sets of maximum size in a suitable graph. A second common feature is that the size of these independent sets meets an eigenvalue bound due to Delsarte and Hoffman. Thirdly, the graphs t...

BACKGROUND Thrice-weekly haemofiltration affords excellent outcome when it is used to treat chronic renal failure patients. Daily haemofiltration (DHF) has recently been proposed as a more intensive therapy option, but the total ultrafiltration or exchange volume (replacement volume plus net ultrafiltration volume) requirements for adequate solute clearances during this novel therapy are unknow...

Ergot alkaloids (EAs) are a group of mycotoxins that mainly produced from the plant pathogen Claviceps. Claviceps purpurea is one most important species, being major producer EAs infect more than 400 species monocotyledonous plants. Rye, barley, wheat, millet, oats, and triticale main crops affected by EAs, with rye having highest rates fungal infection. The 12 ergometrine (Em), ergotamine (Et)...

This paper presents the investigations into the feasibility of the application of a remediation system that couples electrokinetic remediation (EKR) with the permeable reactive barrier (PRB) concept for municipal solid waste incineration (MSWI) fly ash with activated charcoal as the PRB material. The experimental results of this study showed that the proposed combined method can effectively imp...