From the category archives:

Academic

Thesis Introduction in HTML

by Jonathan Gabbai on December 23, 2007

I have been converting my thesis into HTML. I’ll be uploading the chapters one-by-one over the next few months. Chapter One is now online. This is the introduction:

Think of an ant – tiny and rather insignificant on its own. Now think of an ant colony and all of a sudden you have ant path planning, brood sorting and nest climate controls. All this is decentralised; emergent. Now look at man-made systems and organisations; interconnected networks, global connectivity, systems-of-systems thinking. These ideas and implementations are emerging out of typically hierarchical, unresponsive, difficult to maintain legacy approaches grounded in an increasingly fast moving, mass customised and dynamic environment. Given this, the understanding and subsequent exploitation of complex and emergent organisations will have an important role to play in man-made organisations; logistics, manufacturing, co-operation and connectivity. Whilst physicists and to some extent computer scientists have embraced the ideas of emergence and complexity to varying degrees, it will be the engineers and managers that will have to understand and implement them in real life situations. Very little has been undertaken to explore and explain the importance, implications and even benefits of emergent and complex systems in industry. Hence, within the context of the aerospace industry, this thesis is written with the aim of explaining the situation with the engineer and manager thoroughly in mind.

{ 3 comments }

Self-Organization, Emergence and Multi-Agent Systems

by Jonathan Gabbai on October 15, 2005

Abstract. We begin by describing the importance of emergence in industry and the need, in certain situations, to move away from a reduction mind-set to a more holist approach. We define the term emergence in context of self-organizing systems, autopoiesis and chaotic systems. We then examine a field that is commonly used to explore emergence and selforganization, namely agent and multi-agent systems. After an overview of this field, we highlight the most appropriate aspects of agent research used in aiding the understanding of emergence. We conclude with an example of our recent research where we measure agent emergent performance and flexibility and relate it to the make-up of the agent organization.

Citation. Gabbai, J. M. E., Yin, H., Wright, W. A., and Allinson, N. M., “Self-Organization, Emergence and Multi-Agent Systems,” in IEEE International Conference on Neural Networks and Brain, Wang, S., et al., Eds. Berlin: Springer Verlag Heidelberg, Beijing, China: IEEE, 2005, pp. TBC.

Download PDF Download ICNNB 05.pdf

{ 0 comments }

Complexity and the Aerospace Industry: Understanding Emergence by Relating Structure to Performance using Multi-Agent Systems

September 22, 2005

Engineering Doctorate Thesis Abstract. The aerospace industry is at the forefront of technological innovation, both at product level and manufacturing and support levels. Not only are new manufacturing systems computer controlled, they are controlled by networked computers, which, increasingly, are globally connected by public or private internets. Such advances in communication and information [...]

Read the full article →

Visualisation of Multi Agent System Organisations using a Self-Organising Map of Pareto Solutions

August 26, 2004

Abstract. The structure and performance of organisations – natural or man-made – are intricately linked, and these multifaceted interactions are increas-ingly being investigated using Multi Agent System concepts. This paper shows how a selection of generic structural metrics for organisations can be explored using a combination of Pareto Frontier exemplars, from extensive simulations of simple [...]

Read the full article →

Trends, Implications and Overview of Complex Organizations with a Focus on the Aerospace Industry

June 25, 2004

Abstract. The Aerospace Industry is at the forefront of technological innovation, both at product level and manufac-turing and support levels. We draw upon our experience in this sector to illustrate the increasing challenges that large scale complex organizations, exemplified by this sector, are facing. We examine why traditional methodologies are no longer globally appropriate and [...]

Read the full article →

Measuring and Visualizing Organizations by Relating Structure to Performance

August 22, 2003

Abstract. Within a Multi Agent System (MAS) environment, principled metrics are developed that encapsulate the structure and performance of organizations. From extensive simulation work, we can explore performance/cost/structure trade-offs; and, by incorporating data visualization techniques, we can observe the emergence of organization classes and begin to identify optimum organizational structures to meet specified constraints and [...]

Read the full article →

Engineering Doctorates

May 2, 2003

Citation. Gabbai, J. M. E., “Engineering Doctorates,” in The Aerospace Professional, May 2003, pp. 18.
After graduating you either go into industry or stay at university as a postgraduate, right? I thought that was the case when I completed my Aerospace Engineering degree at the University of Manchester. But as someone who enjoyed both [...]

Read the full article →

Relating Organisational Structure to Performance: An Initial Focus on Centralisation

October 8, 2002

Abstract. This paper will focus on relating organisational structure with organisational performance. We first outline the motivation behind this research, from both industrial and academic perspectives. After defining the problem and the research aim, an outline of organisational performance metrics is provided, followed by a detailed look at the centralisation metric. Finally, using our testbed [...]

Read the full article →

Lead Time Reduction in BAE SYSTEMS’ Defence Market

June 15, 2001

This report concentrates on the way BAE SYSTEMS (formally British Aerospace after its recent acquisition of GEC Marconi) deals with the inherently long lead times that occur between contract with customer to the actual commercial production and provision of the product/solution.

This report will describe the overall operational situation faced by BAE SYSTEMS, and then concentrate on the more challenging military market. A brief description of a typical classic aircraft design cycle will be provided, followed by a discussion as to why this is unsuitable for most current and future projects due to the unique situation that defence systems companies face. Finally, an appraisal on current practices and a look into the future concludes the report.

Read the full article →

The Art of Flight Simulation

February 24, 2001

Simulation is an established technique used in the man-machine systems area for training, evaluation of performance and research. The principal task of flight simulation is the creation of a dynamic representation of an aircraft’s behaviour while allowing one or more human operators to interact with the simulation.

Personal experience within the simulation industry gave a small insight into what is a largely closed and highly specialised industry where several technical disciplines are combined to form a highly accurate representation of flight.

Such disciplines include computer graphics, hardware and software engineering, man-machine systems and mathematical systems modelling. One can thus conclude that the true art of simulation is the successful integration of very specific areas to form an accurate representation of an aircraft, and it is hoped that the broad technical spectrum that simulation encapsulates is reflected in this text.

Read the full article →