Steven Lee

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We created our imaging center (IC) to move outpatient imaging from our busy inpatient imaging suite off-site to a location that is more inviting to ambulatory patients. Nevertheless, patients scanned at our IC still represent the depth and breadth of illness complexity seen with our tertiary care population. Thus, we protocol exams on an individualized(More)
The adolescent drug treatment outcome research literature primarily focuses on short-term follow-up periods (e.g., 1 year). This study extends the said literature by describing the pattern of drug use at 1, 4, and 5.5 years in three groups of adolescents: a Treatment group, which underwent a 12-step-based drug treatment program (n = 159); a Waiting List(More)
BACKGROUND/AIMS Suicide is one of the most serious public health challenges; yet determining optimal methods for preventing suicide in adolescents continues to be an elusive goal. The aim of this study was to investigate possible benefits and untoward effects of suicide-prevention public service announcements (PSAs) for adolescents. METHODS Adolescent(More)
This paper proposes an improved wavelet-based method for the delineation of T wave in the electrocardiogram by using multiscale dif-operator (MDO). MDO was employed to automatically categorize the T wave into one of the three categories of T wave morphologies and to improve the precision of T wave delineation for each category. The new algorithm was(More)
Within a …eld experiment, I present a treatment group with reductions in information, administrative, stigma and procrastination costs associated with the Advance EITC. The treatment only increases Advance participation from 0.3 to 1.2 percent. Another treatment simultaneously encourages 401(k) savings, increasing 401(k) participation from 46 to 50 percent.(More)
BACKGROUND The aim of the present study was to assess the clinical significance of spectral analysis of plethysmographic waveform in patients with coronary artery disease (CAD) and after coronary artery bypass graft (CABG) surgery. METHODS AND RESULTS The study group comprised 26 healthy subjects, 15 CAD patients, and 24 CAD patients after CABG. Finger(More)
This paper reports on the design, development and evaluation of a bilingual telephone-based spoken language system for foreign exchange inquiries the CU FOREX system. The telephonebased system supports Cantonese and English in a single spoken language interface to access real-time foreign exchange information. The specific domain covers information on the(More)
AbstTactFinancial markets data is very noise and non-stationary which makes modeling through machine learning from historical information a challenging problem. Our experience indicates that in markets modeling through neural network learning, significant data preprocessing is needed. We have recently proposed a promising multi-component prediction system(More)
Extracorporeal membrane oxygenation (ECMO) is increasingly being used in adults following failure to wean from cardiopulmonary bypass, after cardiac surgery or in cases of severe respiratory failure. Knowledge of the different types of ECMO circuits, expected locations of cannulas and imaging appearance of complications is essential for accurate imaging(More)
This paper reports on our research and development effort in human-computer spoken language interfaces, capable of processing English and Chinese, including two dialects for Chinese (Cantonese and Putonghua). This is the language environment in Hong Kong, and in order to develop human-computer spoken language interfaces that can be used by almost(More)