Gerald C. O'Leary

Learn More
Classical speaker and language recognition techniques can be applied to the classi cation of unknown utterances by computing the likelihoods of the utterances given a set of well trained target models. This paper addresses the problem of grouping unknown utterances when no information is available regarding the speaker or language classes or even the total(More)
The two largest factors affecting automatic speaker iden­ titication performance are the size of the population and the degradations i.ntroduced by noisy communication chan­ nels (e.g., telephol[le transmission). To examine experimen­ tally these two factors, this paper presents text-independent speaker iden titicadon results for varying speaker population(More)
A method is described for estimating telephone handset nonlinearity by matching the spectral magnitude of the distorted signal to the output of a nonlinear channel model, driven by an undistorted reference. This "magnitude-only"representation allows the model to directly match unwanted speech formants that arise over nonlinear channels and that are a(More)
AIM To investigate whether non-Hodgkin's lymphomas arising in the sinonasal region or Waldeyer's ring contain the Epstein-Barr virus (EBV) genome in lesional tissue. METHOD Sections from paraffin wax blocks of 22 lymphoid proliferations arising in the sinonasal region or Waldeyer's ring were studied with EBV encoded RNAs (EBER-1 and -2) using in situ(More)
Blind clustering of multi-person utterances by speaker is complicated by the fact that each utterance has at least two talkers. In the case of a two-person conversation, one can simply split each conversation into its respective speaker halves, but this introduces error which ultimately hurts clustering. We propose a clustering algorithm which is capable of(More)
PURPOSE To determine if the integration of diagnostic magnetic resonance (MR) imaging and MR-guided biopsy would improve target delineation for focal salvage therapy in men with prostate cancer. MATERIALS AND METHODS Between September 2008 and March 2011, 30 men with biochemical failure after radiation therapy for prostate cancer provided written informed(More)
NCOA3 is a known low to moderate-risk breast cancer susceptibility gene, amplified in 5-10% and over expressed in about 60% of breast tumours. Additionally, this over expression is associated with Tamoxifen resistance and poor prognosis. Previously, two variants of NCOA3, 1758G>C and 2880A>G have been associated with breast cancer in two independent(More)
Up to 100% of patients treated with epidural analgesia can experience urinary retention, which may be related to dermatomal level of the epidural block, epidural medication, and surgical procedure. This study was designed to identify the incidence of urinary retention in patients who receive thoracic patient-controlled epidural analgesia (TPCEA) after(More)