African University of Science and Technology: Recent submissions

Now showing items 981-1000 of 4824

  • The production of pure hydrogen with simultaneous capture of carbon dioxide 

    Bohn, Christopher (University of CambridgeDepartment of Chemical Engineering and Biotechnology, 2010-10-12)
    The need to stabilise or even reduce the production of anthropogenic CO2 makes the capture of CO2 during energy generation from carbonaceous fuels, e.g. coal or biomass, necessary for the future. For hydrogen, an ...

  • Direct numerical simulations of spray spark ignition 

    Neophytou, Alexandre; Cant, Stewart R.; Mastorakos, Epaminondas (Engineering Department, 2010-09-09)
    Direct Numerical Simulations (DNS) of a mono-disperse spray in a turbulent flow have been used to explore the nature of flame kernels when a spark is deposited in the spray. The simulations use complicated chemistry and ...

  • Autoregressive clustering for HMM speech synthesis 

    Shannon, SM; Byrne, William Joseph (ISCA (International Speech Communication Association)Proceedings of the 11th Annual Conference of the International Speech CommunicationProceedings of the 11th Annual Conference of the International Speech Communication, 2011)
    The autoregressive HMM has been shown to provide efficient parameter estimation and high-quality synthesis, but in previous experiments decision trees derived from a non-autoregressive system were used. In this paper we ...

  • Autoregressive HMMs for speech synthesis 

    Shannon, SM; Byrne, William Joseph (ISCA (International Speech Communication Association), 2009)
    We propose the autoregressive HMM for speech synthesis. We show that the autoregressive HMM supports efficient EM parameter estimation and that we can use established effective synthesis techniques such as synthesis ...

  • Two-pass decision tree construction for unsupervised adaptation of HMM-based synthesis models 

    Gibson, Matthew (2009)
    Hidden Markov model (HMM) -based speech synthesis systems possess several advantages over concatenative synthesis systems. One such advantage is the relative ease with which HMM-based systems are adapted to speakers not ...

  • Unsupervised cross-lingual speaker adaptation for HMM-based speech synthesis using two-pass decision tree construction 

    Gibson, Matthew Thomas; Hirsimaki, T; Karhila, R; Kurimo, M; Byrne, William Joseph (Proceedings of the IEEE International Conference on Acoustics, Speech and Signal ProcessingProceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing, 2010)
    This paper demonstrates how unsupervised cross-lingual adaptation of HMM-based speech synthesis models may be performed without explicit knowledge of the adaptation data language. A two-pass decision tree construction ...

  • Autoignition of droplets in hot air flow 

    Gordon, Robert; Mastorakos, Epaminondas (2010-09-09)
    A single-droplet generator has been used to inject fuel droplets of various sizes and chemical composition into a hot turbulent air flow. The ensuing autoignition and flame behaviour has been recorded with a fast camera. ...

  • Development and validation of a combustion model for a fuel cell off-gas burner 

    Collins, William Tristan (University of CambridgeMagdalene College, 2008-10-14)
    A low-emissions power generator comprising a solid oxide fuel cell coupled to a gas turbine has been developed by Rolls-Royce Fuel Cell Systems. As part of the cycle, a fraction of the unreacted fuel (the off-gas) and ...

  • Unsupervised intralingual and cross-lingual speaker adaptation for HMM-based speech synthesis using two-pass decision tree construction 

    Gibson, Matthew; Byrne, William Joseph (IEEE Transactions on Audio, Speech and Language Processing, 2010)
    Hidden Markov model (HMM)-based speech synthesis systems possess several advantages over concatenative synthesis systems. One such advantage is the relative ease with which HMM-based systems are adapted to speakers not ...

  • Development of novel laser diagnostic techniques for the quantitative study of premixed flames 

    Chrystie, Robin Simon Macpherson (University of CambridgeJesus College, 2009)
    The main topic of this thesis concerns the development and application of laser diagnostic techniques for accurate temperature measurements and for the determination of flamefront properties in premixed flames that can ...

  • On strategic default and liquidity risk 

    Tambakis, Demosthenes N (CFAP, Cambridge Judge Business School, University of Cambridge, 2002)
    How does the uncertain provision of external finance affect investment projects' default probability and liquidity risk? In this paper, I study the strategic interaction between many creditors and a single borrower in the ...

  • The supervisory approach: a critique 

    Ward, Jonathan (CFAP, Cambridge Judge Business School, University of Cambridge, 2002)
    Rules suffer from two serious defects. The world is complex, and so the creation and application of rules is difficult; and it changes, so that rules become obsolete. In recent years, the conventional wisdom on financial ...

  • Depreciation bias, financial-sector fragility and currency risk 

    Tambakis, Demosthenes N (CFAP, Cambridge Judge Business School, University of Cambridge, 2002)
    Do expected future exchange rate fluctuations affect current social welfare? In the third-generation approach to currency crises, financial fragility can trigger devaluation and default. Expected future depreciation is ...

  • Establishing a European securities regulator: is the European Union an optimal economic area for a single securities regulator? 

    Alexander, Kern (CFAP, Cambridge Judge Business School, University of Cambridge, 2002)
    The paper’s purpose is to address the economic, institutional, and legal issues confronting the establishment of a more centralised approach to EU securities regulation and to suggest that the theory of optimum currency ...

  • The World Trade Organization and financial stability: the balance between liberalisation and regulation in the GATs 

    Alexander, Kern (CFAP, Cambridge Judge Business School, University of Cambridge, 2003)
    The WTO General Agreement on Trade in Services and its Annex on Financial Services provide the international legal framework for the regulation of cross-border trade in financial services. This paper analyses some of the ...

  • The new Basel accord and developing countries: problems and alternatives 

    Ward, Jonathan (CFAP, Cambridge Judge Business School, University of Cambridge, 2002)
    The new Basel Accord framework relies on markets and supervisors to discipline banks. Yet both markets and supervisors fail, and more so in developing countries than in high-income countries. Therefore, the new Accord is ...

  • Economic slowdown in the US, rehabilitation of fiscal policy and the case for a co-ordinated global reflation 

    Izurieta, Alex (CFAP, Cambridge Judge Business School, University of Cambridge, 2003)

  • International financial contagion: what do we know? 

    Dungey, Mardi; Tambakis, Demosthenes N (CFAP, Cambridge Judge Business School, University of Cambridge, 2003-07)
    This paper attempts a synthesis of theoretical and empirical work on international financial contagion. Although a professional consensus on the appropriate definitions of contagion has yet to emerge, we document substantial ...

  • Two-country stock-flow-consistent macroeconomics using a closed model within a dollar exchange regime 

    Godley, Wynne; Lavoie, Marc (CFAP, Cambridge Judge Business School, University of Cambridge, 2003)

  • Empirical modelling of contagion: a review of methodologies 

    Dungey, Mardi; Fry, Renee; Gonzalez-Hermosillo, Brenda; Martin, Vance L (CFAP, Cambridge Judge Business School, University of Cambridge, 2003-10)
    The existing literature promotes a number of alternative methods to test for the presence of contagion during financial market crises. This paper reviews those methods and shows how they are related in a unified framework. ...