Heather Friedberg

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We present a model for detecting user disengagement during spoken dialogue interactions. Intrinsic evaluation of our model (i.e., with respect to a gold standard) yields results on par with prior work. However, since our goal is immediate implementation in a system that already detects and adapts to user uncertainty, we go further than prior work and(More)
Lexical entrainment is a measure of how the words that speakers use in a conversation become more similar over time. In this paper, we propose a measure of lexical entrainment for multi-party speaking situations. We apply this score to a corpus of student engineering groups using high-frequency words and project words, and investigate the relationship(More)
Within tutoring systems research, there has been a lot of recent interest in developing systems that adapt their responses to the student’s changing affect and attitude as conveyed during the human-computer interaction (e.g., (Forbes-Riley & Litman, 2010b; Conati & Maclaren, 2009; D’Mello et al., 2008; McQuiggan et al., 2008b; Porayska-Pomsta et al., 2008;(More)
A 65-year-old man had bypass surgery 10 years previously with pulmonary artery catheter monitoring. Shortness of breath and mitral regurgitation necessitated repeat left and right heart catheterization using a pulmonary artery catheter. Before any iodinated contrast media exposure, the pulmonary artery catheter was inserted and within 2 min the patient(More)
Fifty-seven patients with electronic pacemakers were studied from electrocardiograms (ECGs), vectorcardiograms (VCGs), and echocardiograms. Thirty-nine patients with transvenous right ventricular (RV) pacemakers showed a left bundle branch block (LBBB) pattern and nine patients with transvenous RV pacemakers showed a right bundle branch block (RBBB)(More)
In 1976, the authors became the codevelopers of the first successful bileaflet heart valve which has become the standard in valvular surgery. However, there still remains a significant rate of thromboembolism and thrombosis which can be attributed to the inherent design of cavities in the pivot area. These cavities contribute to stagnant areas that lead to(More)
Two cases of atrial parasystole showing the various manifestations of the arrhythmia are presented. Analysis of the underlying mechanisms shows that atrial parasystolic bigeminy with ;reversed' coupling is a form of escape-capture begeminy, sinus escapes being followed by an ectopic capture of the atria. Reasons are given for the rarity of atrial fusion(More)