A key aspect of cloud computing is the promise of infinite, scalable resources, and that cloud services should scale up and down on demand. This thesis investigates methods for dynamic resource allocation and management of services in cloud datacenters, introducing new approaches as well as improvements to established technologies. Virtualization is a key technology for cloud computing as it al...

Both financing and risk management involve promises to pay that need to be collateralized, resulting in a financing versus risk management trade-off. We study this trade-off in a dynamic model of commodity price risk management and show that risk management is limited and that more financially constrained firms hedge less or not at all. We show that these predictions are consistent with the evi...

Purpose: This paper presents a framework for ontology evolution tailored to Digital Libraries, which makes use of two different sources for change detection and propagation, the usage of ontologies by users and the changes of available data. Approach: After presenting the logical architecture of the evolution framework, we first illustrate how to deal with usage-driven changes, that is changes ...

Saccharamyces cerevisia known as baker’s yeast is a product used in various food industries. Worldwide economic competition makes it a necessity that industrial processes be operated in optimum conditions, thus maximisation of biomass in production of saccharamyces cerevisia in fedbatch reactors has gained importance. The facts that the dynamic fermentation model must be considered as a constra...

This document reports on progress made towards DITTO Project Deliverable 3.1, on the development and testing of a rail network simulation model and the use of the resulting model to examine the traffic management and optimal control strategies for ERTMS Level 3. Whilst the advanced technologies employed by ERTMS Level 3, moving away from trackbased detection and line-side signalling of the curr...

Data sources for Department of Defense (DoD) applications often include disparate real-time sensor and archival sources with multiple dimensions, very high delivery rates, and very large volumes over time. Analysts, at present, must manually comb through immense volumes of multisource, multiclassification-level intelligence data to find previously unknown and undiscovered patterns, associations...

This paper investigates the optimal dynamic investment for an investor who maximizes constant absolute risk aversion (CARA) utility in a discrete-time market with a riskfree bond and a risky stock. The risky stock is assumed to present both the dividend risk and the price risk. With our assumptions, the dividend risk is equivalent to fundamental risk, and the price risk is equivalent to the noi...

Automated control and safety systems that help a plant return to normal operating conditions when abnormal events occur are prevalent in modern chemical plants. The databases associated with these systems contain a wealth of information about near-miss occurrences that, if subjected to frequent statistical analysis, can provide metrics to predict and ideally prevent accidents. Such analysis is ...

This information-only contribution defines some potential dynamic spectrum-management methods and provides examples of potential improvements in their use. This contribution is not meant to provide sample text or methods for dynamic spectrum management, but rather to motivate study. This contribution investigates two types of spectrum management: static and dynamic. Dynamic spectrum management ...