Paul D. O’Grady

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Preoperative anaemia confers a higher intraoperative and postoperative risk of complications on a patient. Preclinical anaemia is defined as a patient with laboratory indices of anaemia but without any of the symptoms. The patient population who undergo total hip replacement (THR) are elderly and are more likely to fall into this category. Our aim was to(More)
Discovering a parsimonious representation that reflects the structure of audio is a requirement of many machine learning and signal processing methods. Such a representation can be constructed by Non-negative Matrix Factorisation (NMF), which is a method for finding parts-based representations of non-negative data. We present an extension to NMF that is(More)
Discovering a representation that allows auditory data to be parsimoniously represented is useful for many machine learning and signal processing tasks. Such a representation can be constructed by Nonnegative Matrix Factorisation (NMF), which is a method for finding parts-based representations of non-negative data. Here, we present an extension to(More)
The aim of the present study was to evaluate functional and quality of life outcomes after transosseous equivalent (TOE) double row suture technique for massive rotator cuff (RTC) tear repair using validated subjective and objective measures. This technique has shown promising preliminary results in RTC repair; however, a paucity of evidence regarding these(More)
Automatic music transcription is a widely studied problem, Typically, recordings that are used for transcription are taken from standard instruments, in the case of electric stringed instruments—such as the electric guitar—the recordings are captured from a standard pick-up, which unwantedly mixes the signals from each string and complicates subsequent(More)
It is hard to avoid ASCII Art in today’s digital world, from the ubiquitous emoticons—;)—to the esoteric artistic creations that reside in many people’s e-mail signatures, everybody has come across ASCII art at some stage. The origins of ASCII art can be traced back to the days when computers had a high price, slow operating speeds and limited graphics(More)
The new emerging theory of Compressive Sampling has demonstrated that by exploiting the structure of a signal, it is possible to sample a signal below the Nyquist rate and achieve perfect reconstruction. In this paper, we consider a special case of Compressive Sampling where the uncompressed signal is non-negative, and propose an extension of Non-negative(More)
The new emerging theory of Compressive Sampling has demonstrated that by exploiting the structure of a signal, it is possible to sample a signal below the Nyquist rate and achieve perfect reconstruction. In this short note, we employ Non-negative Matrix Factorisation in the context of Compressive Sampling and propose two NMF algorithms for signal(More)