Pragmatic linguistic constraint models for large-vocabulary speech processing

Current systems for speech recognition suffer from uncertainty: rather than delivering a uniquely-identified word, each input segment is associated with a set of recognition candidates or word-hypotheses. Thus an input sequence of sounds or images leads to, not an unambiguous sequence of words, but a lattice of word-hypotheses. To choose the best candidate from each word-hypothesis set (i.e. to find the best route through the lattice) , linguistic context needs to be taken into account, at several levels: lexis and morphology, parts-of-speech, phrase structure, semantics and pragmatics. We believe that an intuitively simple, naive model will suffice at each level; the sophistication required for full Natural Language Understanding (NLU) (e.g. Alvey Natural Language Toolkit (ANLT)) is inappropriate for real-time language recognition. We describe here models of each linguistic level which are simple but robust and computationally straightforward (hence `pragmatic' in the everyday sense) and which have clear theoretical shortcomings in the eyes of linguistic purists but which nevertheless do the job

Temporal contexts and actors vis-a-vis I-deals' timing and creation: Evidence from Nigeria

I-deals (that is, personalised, non-standard employment arrangements negotiated between employees and their employers) arise at different stages of the employment lifecycle. I-deals can vary by timing, such as those created before hire (ex-ante) versus after hire (ex-post). However, scholars have not fully considered the impact of the temporal context (environmental, social, economic, individual) on I-deals or how a range of organisational actors may respond to enabling/constraining conditions when creating I-deals. Our paper focuses on the under-explored issue of I-deals’ timing by applying the theoretical lens of institutional entrepreneurship (IE). Key IE concepts enable a more critical understanding of broader temporal context impacts and the role of various actors (I-dealers, organisational agents) in creating I-deals. Drawing on a multicase study of 3 Nigerian organisations (62 semi-structured interviews, including fieldnotes and organisation-specific documents), our data revealed that field-level conditions and actors’ social positions interact to highlight (i) several distinctive temporal contexts, (ii) with differential impacts on I-deals’ timing and subsequently (iii) organisational actors adopting a range of tactics in response to enabling/constraining conditions. Based on these findings, we offer a theoretical model that reconceptualises I-deals’ timing by specifically focusing on the invisible concept of time. Finally, we discuss our study’s implications for I-deal research and offer future research directions and recommendations for practice

Dialogue structure models: an engineering approach to machine analysis and generation of dialogue

The problem area addressed within this research is the processing and understanding of natural English dialogue by computer. The presented work fundamentally constitutes the development of a theory for modelling natural dialogue, and the practical implementation of that theory. There are two major aspects of consideration within the theory: the modelling of dialogue structure is balanced against certain individual factors. The structure of the dialogue is modelled via the mechanism of the Dialogue Structure Models and its constituent parts, accounting for situational context, participant motivation, participant role(s) and other contributory factors. The individual factors, on the other hand, are peculiar to the dialogue currently in progress, and cannot be pre-determined in the way that structure can. These factors include:1. The personal characteristics of the participants (their personalities, backgrounds, interests and belief systems); 2. The overall mood of the participant (how (s)he is feeling today; the emotional state of the participant); 3. Instantiation factors relating to the events and circumstances of the particular dialogue in progress. (For example, how a participant reacts intellectually or emotionally to what the other person has just said).A description of the implementation of this theory is presented, followed by a discussion of the testing techniques used to ensure that the original criteria for success have been met

A telepresence environment for concurrent life-cycle design and construction

Construction projects normally involve transient 'virtual organisations', where a multidisciplinary project team works together on the design and construction of a facility. Many of these participants often work independently while taking decisions that inevitably affect others. The research described in the thesis involved examining the adoption of concurrent engineering (CE) principles by the construction industry as a way to reduce the problems posed by the fragmentation of the industry, and to enhance its competitiveness. An important aspect of concurrent engineering in construction is the need for effective communication of design information between all members of the project team and across all stages of the constructed facility's life-cycle. The thesis describes the development of a communications infrastructure for Concurrent Life-Cycle Design and Construction. [Continues.

ADAPTABLES 2006 : proceedings of the joint CIB, Tensinet, IASS international conference on adaptability in design and construction, Volume 3

No abstract

Digital creativity - an investigation into architectural design in the electronic age

A dissertation submitted to the University of Bedfordshire in partial fulfilment of the requirements for the degree of Master of Philosophy.This study explores approaches to architectural creativity and collaborative design in the contemporary digital design context. The thesis identifies key trends and developments in the historical and present-day evolution of the creative use of computers by architects in education and practice. It examines the current manifestations of digitally supported architectural design, and investigates the ways in which computers and electronic communication technologies are being utilised in the design process. In the context of, and informed by, this investigative survey the author evolves three key models or analogues for the application of computer based techniques in the creative design process. Each design analogue has been tested with the collaboration of undergraduate architecture students and their academic teaching staff through experimental pedagogic design projects, which have been used to evaluate their validity and effectiveness. The working principles developed through these projects have also been applied in a realworld context, through a live professional case study architectural project undertaken by the author in commercial architectural practice. The concluding section examines the current state of play in the relationship between theoretical ideas and the practice of architectural design using digital techniques, to assess the methodological validity of the design analogues in the educational and practice spheres, and to make recommendations for future areas of research