104 research outputs found
Investigation on N-gram Approximated RNNLMs for Recognition of Morphologically Rich Speech
Recognition of Hungarian conversational telephone speech is challenging due
to the informal style and morphological richness of the language. Recurrent
Neural Network Language Model (RNNLM) can provide remedy for the high
perplexity of the task; however, two-pass decoding introduces a considerable
processing delay. In order to eliminate this delay we investigate approaches
aiming at the complexity reduction of RNNLM, while preserving its accuracy. We
compare the performance of conventional back-off n-gram language models (BNLM),
BNLM approximation of RNNLMs (RNN-BNLM) and RNN n-grams in terms of perplexity
and word error rate (WER). Morphological richness is often addressed by using
statistically derived subwords - morphs - in the language models, hence our
investigations are extended to morph-based models, as well. We found that using
RNN-BNLMs 40% of the RNNLM perplexity reduction can be recovered, which is
roughly equal to the performance of a RNN 4-gram model. Combining morph-based
modeling and approximation of RNNLM, we were able to achieve 8% relative WER
reduction and preserve real-time operation of our conversational telephone
speech recognition system.Comment: 12 pages, 2 figures, accepted for publication at SLSP 201
Granulomatous hepatitis due to Bartonella henselae infection in an immunocompetent patient
<p>Abstract</p> <p>Background</p> <p><it>Bartonella henselae </it>(<it>B. henselae</it>) is considered a rare cause of granulomatous hepatitis. Due to the fastidious growth characteristics of the bacteria, the limited sensitivity of histopathological stains, and the non-specific histological findings on liver biopsy, the diagnosis of hepatic bartonellosis can be difficult to establish. Furthermore, the optimal treatment of established hepatic bartonellosis remains controversial.</p> <p>Case presentation</p> <p>We present a case of hepatic bartonellosis in an immunocompetent woman who presented with right upper quadrant pain and a five cm right hepatic lobe mass on CT scan. The patient underwent a right hepatic lobectomy. Surgical pathology revealed florid necrotizing granulomatous hepatitis, favoring an infectious etiology. Despite extensive histological and serological evaluation a definitive diagnosis was not established initially. Thirteen months after initial presentation, hepatic bartonellosis was diagnosed by PCR studies from surgically excised liver tissue. Interestingly, the hepatic granulomas persisted and <it>Bartonella henselae </it>was isolated from the patient's enriched blood culture after several courses of antibiotic therapy.</p> <p>Conclusion</p> <p>The diagnosis of hepatic bartonellosis is exceedingly difficult to establish and requires a high degree of clinical suspicion. Recently developed, PCR-based approaches may be required in select patients to make the diagnosis. The optimal antimicrobial therapy for hepatic bartonellosis has not been established, and close follow-up is needed to ensure successful eradication of the infection.</p
Technical support role for problem/project based learning in electrical engineering
Abstract not available
Saving, Investment and capital mobility in G-7 countries: Time varying parameters approach
This paper investigates the relationship between domestic saving (S) and investment (I) to assess degree of capital mobility for G7 countries during the period 1960- 2007. To this end, Engle-Granger (1987) and Gregory-Hansen (1996) residual based co-integration tests was firstly applied for each of the G7 countries, but we did not find any evidence of a long-run relationship between S and I. Extending the analysis to time varying parameters (TVP) approach to see changes in the capital mobility over time, the findings suggest that there is no significant increase in capital mobility in the sense of Feldstein-Horioka (1980). © EuroJournals Publishing, Inc. 2010
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