Liu B.,Rutgers University |
Huang J.,Rutgers University |
Yang L.,UMDNJ |
Kulikowsk C.,Rutgers University
Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition | Year: 2011
Online learned tracking is widely used for it's adaptive ability to handle appearance changes. However, it introduces potential drifting problems due to the accumulation of errors during the self-updating, especially for occluded scenarios. The recent literature demonstrates that appropriate combinations of trackers can help balance stability and flexibility requirements. We have developed a robust tracking algorithm using a local sparse appearance model (SPT). A static sparse dictionary and a dynamically online updated basis distribution model the target appearance. A novel sparse representation-based voting map and sparse constraint regularized mean-shift support the robust object tracking. Besides these contributions, we also introduce a new dictionary learning algorithm with a locally constrained sparse representation, called K-Selection. Based on a set of comprehensive experiments, our algorithm has demonstrated better performance than alternatives reported in the recent literature. © 2011 IEEE.
Journal of neurointerventional surgery | Year: 2010
Ruptured intracranial aneurysms are responsible for over 90% of cases of spontaneous subarachnoid hemorrhage (SAH). Conventional digital subtraction angiography (DSA) remains the gold standard for diagnosing the source of SAH. A prospective study is presented wherein SAH patients underwent three dimensional CT angiography (CTA) prior to DSA in order to assess the specificity and sensitivity of this non-invasive modality to detect aneurysms. 179 consecutive patients with spontaneous SAH presented over 36 months, as identified by screening CT and CTA. Patients with negative CTA findings underwent DSA within 24 h of presentation. All patients who were determined to have angiographically negative SAH underwent follow-up DSA 2 weeks later. Of the 179 patients screened by CTA, 13 (7%) were negative for aneurysms or other vascular lesions (arteriovenous malformation or dural fistula) on CTA and underwent DSA. No new lesions were identified on six vessel angiography, resulting in a 0% false negative rate (sensitivity 100%, predictive value 100%). MRI to rule out thrombosed aneurysms and repeat angiography at the 2 week follow-up were negative. Sensitivity and specificity were higher than previously reported, suggesting that CTA may be used as an initial screening tool in lieu of DSA. Further studies are necessary to determine if CTA can supplant DSA in ruling out all forms of vascular disease in idiopathic SAH.
Marshall E.G.,UMDNJ |
Harris G.,Robert Wood Johnson Medical School |
Birth Defects Research Part A - Clinical and Molecular Teratology | Year: 2010
BACKGROUND: Evidence links exposure to ambient air pollution during pregnancy, particularly gaseous pollutants and particulate matter, to an increased risk of adverse reproductive outcomes though the results for birth defects have been inconsistent. METHODS: We compared estimated exposure to ambient air pollutants during early pregnancy among mothers of children with oral cleft defects (cases) to that among mothers of controls, adjusting for available risk factors from birth certificates. We obtained ambient air pollutant data from air monitoring sites in New Jersey for carbon monoxide (CO), nitrogen dioxide (NO2), ozone (O3), sulfur dioxide (SO2), particulate matter <10 lm in aerodynamic diameter (PM10) and particulate matter <2.5 lm in aerodynamic diameter (PM2.5). We used values from the nearest monitor (within 40 km of the residence at birth) for controls, cleft lip with or without cleft palate (CLP) and cleft palate only (CPO). RESULTS: Based on logistic regression analyses for each contaminant and all contaminants together, there were no consistent elevated associations between selected air pollutants and cleft malformations. Quartile of CO concentration showed a consistent protective association with CPO (p < 0.01). For other contaminants, confidence intervals (95%) of the odds ratios for some quartiles excluded one. CLP showed limited evidence of an association with increasing SO2 exposure while CPO showed weak associations with increasing O3 exposure. CONCLUSION: There was little consistent evidence associating cleft malformations with maternal exposure to ambient air pollutants. Evaluating particular pollutants or disease subgroups would require more detailed measurement of exposure and classification of cleft defects. © 2010 Wiley-Liss, Inc.
Aziz S.R.,UMDNJ |
Ziccardi V.B.,UMDNJ |
Chuang S.-K.,Harvard University
Journal of Oral and Maxillofacial Surgery | Year: 2013
Purpose: To survey chief residents in accredited oral and maxillofacial surgery (OMS) training programs to assess their satisfaction with their surgical training and analyze their career plans after residency. Materials and Methods: A 19-question anonymous survey was electronically mailed to 212 individuals identified as graduating chief residents in accredited OMS training programs. Results: Ninety-four individuals (44%) completed the survey. Of these 85 were men (90.4%) and 9 were women (9.6%). Average age was 32 years. Forty-seven respondents (50%) completed the 4-year traditional OMS programs, 37 respondents (39.4%) completed the 6-year MD integrated programs, 9 respondents (9.6%) completed the 4-year MD option programs, and 1 listed "other" as a program type. Fifty-two individuals (55.3%) planned a full-time private practice career, 5 (5.3%) planned a full-time academic career, 3 (3.2%) planned a military career, 27 (28.7%) planned a combined private practice and academic career, and 7 (7.4%) planned to complete a fellowship after residency. Seventy-nine of all respondents (84%) were satisfied with their OMS training program, whereas 15 (16%) were not. Conclusion: Most participants of this survey were satisfied with their training program and OMS as a career. However, it is important to note that less than half (44%) of chief residents who received this survey completed it. This short survey is a pilot survey; a more involved evaluation of OMS resident satisfaction is planned, further assessing satisfaction and burnout during residency. © 2013 American Association of Oral and Maxillofacial Surgeons.
Cutting M.F.,UMDNJ |
Medical Teacher | Year: 2012
Background: Research in the cognitive sciences on learning and memory conducted across a range of domains, settings, and age groups has resulted in the identification and formulation of a set of generic learning principles. These learning principles have proven relevant and applicable to a wide range of learning situations in a variety of settings, and can be useful in supporting medical education. They can provide guidance to medical students for efficient and effective study, and can be helpful to faculty to support instructional planning and decisions relating to curriculum. Aim: This article discusses evidence-based principles of learning and their relationship to effective learning, teaching, pedagogy and curriculum development. Method: We reviewed important principles of learning to determine those most relevant to improving medical student learning, guiding faculty toward more effective teaching, and in designing a curriculum. Results: Our analysis has resulted in the articulation of key learning principles and specific strategies that are broadly applicable to medical school learning, teaching, and instructional planning. Conclusions: The twelve tips highlight principles of learning that can be effectively applied in the complex learning environment of medical education. © 2012 Informa UK Ltd All rights reserved.