Computer Engineering Commons^™

Entropy And Certainty In Lossless Data Compression, James Jay Jacobs

Dissertations

Data compression is the art of using encoding techniques to represent data symbols using less storage space compared to the original data representation. The encoding process builds a relationship between the entropy of the data and the certainty of the system. The theoretical limits of this relationship are defined by the theory of entropy in information that was proposed by Claude Shannon. Lossless data compression is uniquely tied to entropy theory as the data and the system have a static definition. The static nature of the two requires a mechanism to reduce the entropy without the ability to alter either …

Defining A Framework For Knowledge Sharing In A Dynamic Sales Oriented Organisation, Joern Hussock

Dissertations

The analysts of Datamonitor describe the knowledge management and collaboration as 2009 trends to watch. Why is collaboration and KM so important? It can be managed for unstructured business processes through sharing knowledge, best practices and experience on the business process context, soliciting feedback on problem resolution, seeking support from colleagues or communicating with other partner and customer communities. The challenge for organisations, especially for sales oriented teams is finding a way of structured managing and supporting the combination of the benefits based on the exchange of information in already existing unstructured activities in collaborative environments. This research aims to …

Computing For Knowledge Management: From Nonaka To Visualisation And Knowledge Maps, Helmut Huber

Dissertations

Management itself is not always clearly understood, however, the confusion can be sorted if the underlying theory is clearly distinguished from its implementations. There also may be a specific role for computing in Knowledge Management. It is suggested that Knowledge Management technologists seek a unique strategic position for Computing in Knowledge Management, for reasons of clarity and differentiation from Information Systems. The effective transfer of knowledge is one of the main themes or core competency in Knowledge Management. This is also one of the areas where Knowledge Management technologists may find the niche for a distinct and unique contribution the …

Inferring Gene Regulatory Networks From Time Series Microarray Data, Peng Li

Dissertations

The innovations and improvements in high-throughput genomic technologies, such as DNA microarray, make it possible for biologists to simultaneously measure dependencies and regulations among genes on a genome-wide scale and provide us genetic information. An important objective of the functional genomics is to understand the controlling mechanism of the expression of these genes and encode the knowledge into gene regulatory network (GRN). To achieve this, computational and statistical algorithms are especially needed.

Inference of GRN is a very challenging task for computational biologists because the degree of freedom of the parameters is redundant. Various computational approaches have been proposed for …

Knowledge Transfer Within A Software Development Team, Geraldine Conway

Dissertations

Knowledge in a software company is the blood of the company, not surviving without

the valuable knowledge running through its veins. Knowledge is no longer seen as an

object of competitive advantage but is the core of how an organisation operates.

The transfer of tacit knowledge into a format that is usable and can be transmitted to

other individuals is a challenge in any organisation due to the nature of this

knowledge. Tacit knowledge is a challenge to convert into an explicit form as it is hard

to contextualise this knowledge in order for it to be reusable for others. …

Investigating The Viability Of Virtual Communities Of Practice In The Public Sector, Sue Bolger

Dissertations

Communication and collaboration are very important topics in the domain of

Knowledge Management. Knowledge, which exists within the employees of an

organisation, can be extracted and harnessed effectively to become an extremely

valuable asset to the ongoing business goals and objectives of the organisation. This

embedded knowledge must be released in an appropriate manner in order for it to be

usable and, it has been shown that dialogue and discussion through the use of an online

tool, enables this release and re-use of vital concepts and knowledge.

This research investigates the area of communication and knowledge sharing amongst

disparate Irish …

The Genesis And Emergence Of Web 3.0: A Study In The Integration Of Artificial Intelligence And The Semantic Web In Knowledge Creation, David Mulpeter

Dissertations

The web as we know it has evolved rapidly over the last decade. We have gone from a phase of rapid growth as seen with the dot.com boom where business was king to the current web 2.0 phase where social networking, Wiki’s, Blogs and other related tools flood the bandwidth of the world wide web. The empowerment of the web user with web 2.0 technologies has led to the exponential growth of data, information and knowledge on the web. With this rapid change, there is a need to logically categorise this information and knowledge so it can be fully utilised …

Communications And Positioning In Wireless Networks, Yao Zhao

Dissertations

My doctoral research for the past three years is presented in this report. My research mainly focuses on the communications and positioning for wireless networks and is composed of three parts. First, I explored a new Turbo frequency equalization technique for multiple-input multiple-output (MIMO) wireless communications systems to improve the performance of wireless communications. In the second part of my research, I studied the multiple antenna cooperative communications from the perspective of information theories. The third part of my work is dedicated to extensive research on positioning technology for wireless networks using knowledge of the estimation theory in signal processing.

On Modeling And Mitigating New Breed Of Dos Attacks, Amey Bhaskar Shevtekar

Dissertations

Denial of Service (DoS) attacks pose serious threats to the Internet, exerting in tremendous impact on our daily lives that are heavily dependent on the good health of the Internet. This dissertation aims to achieve two objectives:1) to model new possibilities of the low rate DoS attacks; 2) to develop effective mitigation mechanisms to counter the threat from low rate DoS attacks.

A new stealthy DDoS attack model referred to as the "quiet" attack is proposed in this dissertation. The attack traffic consists of TCP traffic only. Widely used botnets in today's various attacks and newly introduced network feedback control …

Opinion Mining With The Sentwordnet Lexical Resource, Bruno Ohana

Dissertations

Sentiment classification concerns the application of automatic methods for predicting the orientation of sentiment present on text documents. It is an important subject in opinion mining research, with applications on a number of areas including recommender and advertising systems, customer intelligence and information retrieval. SentiWordNet is a lexical resource of sentiment information for terms in the English language designed to assist in opinion mining tasks, where each term is associated with numerical scores for positive and negative sentiment information. A resource that makes term level sentiment information readily available could be of use in building more effective sentiment classification methods. …

Improving Knowledge Sharing In An Open Informal Network: Knowledge Management In Open Coffee, Adrian Mihai

Dissertations

The 21st century opened a new era in communications bringing in faster, more efficient and more advanced information and communication technologies than ever. New ideas and innovations, as well as interactions and collaborations determine the landscape of knowledge and consequently add new requirements to the know-how. The creators of knowledge and design add new communication architecture bodies through the use of technology.

Meanwhile knowledge management inspires 21st century enterprises to adopt new learning patterns throughout organisations and adopt new ideas. However, internal sharing mechanisms leverage a trusted environment where people can engage freely and securely in sharing knowledge and feel …