Library: Computer Science

In this dissertation, a new spare capacity planning methodology is proposed utilizing path restoration. The approach is based on forcing working flows/traffic which are on paths that are disjoint to share spare backup capacity. The algorithm for determining the spare capacity assignment is based on genetic algorithms and is capable of incorporating non-linear variables such as non-linear cost function and QoS variables into the objective and constraints. The proposed methodology applies to a wider range of fault scenarios than most of the current literature. It can tolerate link-failures, n...

Comprehensive global garbage detection (GGD) in object-oriented distributed systems, i.e., GGD intrinsically able to detect distributed cycles of garbage, has mostly been addressed via graph tracing algorithms. Graph tracing algorithms must account for every live object in the system before any resource can actually be reclaimed which compromises both their scalability and robustness in a distributed environment. Alternative non-comprehensive approaches trade-off comprehensiveness for scalability and robustness under the assumptions that distributed cycles of garbage are rare and that al...

"Liberal order and software-agents" - long-established ideas and modern technology are bridged. The impulse for undertaking this effort comes from the observation that it becomes difficult for computer science alone to create order for and within machines. The growing complexity of computer systems, open networks like the Internet, and the increasingly social role of software entities push the traditional quest for total global control out of reach. Economic theory of social order offers extensive experience with such conditions, so that it can complement and guide research in computer science...

Despite the fact the human computer interface is the main facilitator of communication between the user and the computer system, its importance has been highly disregarded by system designers. This has resulted in many undesirable consequences, and in prescription and other healthcare systems, these problems are aggravated by the fact that not only are the users inconvenienced, but there are potential threats to the well-being of the patients under care as well. Many healthcare systems are often designed without considering the potential users of these systems. Consequently, the systems are cr...

In this dissertation, I have presented a comprehensive research on Bitcoin. Bitcoin was introduced in 2009. This is a decentralized digital currency and works like cash, but they are mined like gold (Volastro, CNBC Explains: How to mine bitcoins on your own, 2014). In this thesis, I will explain that how this currency works and how users can mine Bitcoins. Bitcoins mining is a very hard process, it is almost impossible to create Bitcoins on simple computer. You need specialist hardware to generate Bitcoins. Pool mining is quite popular these days, as numbers of people are taking interest in ma...

In this thesis we advance the state-of the practice in the Space Mission Operations domain by leveraging single spacecraft technologies along with classical scheduling frameworks and notation to create a scheduler for a constellation of spacecraft. We define a scheduling product that is focused on the problem of scheduling networked groups of spacecraft, called constellations. Within this thesis we show that the constellation schedule problem is a very complex problem, and the application of heuristics is one approach that allow us to schedule successfully. Our first objective, comprising chap...

Information theory methods are of wide use in contemporary logic design, but their proper application to Computer Aided Design (CAD) is rather impossible without strong theoretical and practical justification. Our research is focused on logic function minimization which is an essential component of any system for digital circuit design. The well-known information theory methods to minimize logic functions should be improved and developed towards new problems appeared while increasing the number of CAD applications. We report new results on logic functions minimization by information theory sta...

Context Mediation is a field of research that is concerned with the interchange of information across different environments, which provides a vehicle to bridge semantic gaps among disparate entities. Knowledge Discovery is concerned with the extraction of actionable information from large databases. A challenge that has received relatively little attention is knowledge discovery in a highly disparate environment, that is multiple heterogeneous data sources, multiple domain knowledge sources and multiple knowledge patterns. This thesis tackles the problem of semantic interoperability among ...

Cross Language Text Retrieval (CLTR) has been defined as the retrieval of documents in a language different from that of the original query. To make this possible some kind of mechanism has to be applied in order to translate the information contained in the source sentence. Many different approaches have been carried out with the purpose of transferring the information from the source language query to the target language one. Though all these methods deal with a way of translating as much information as possible from the source query, little research has been conducted in relation to the fie...

This study analyzes experimental data generated by human subjects using the Perspecta 3D Volumetric Display and a 2D flat screen liquid crystal display (LCD). The analysis reveals differences in how experiment participants used the display technologies.