Angelica Chen

In physical reasoning, humans are often able to carry out useful reasoning based on radically
incomplete information. One physical domain that is ubiquitous both in everyday interactions and in
many kinds of scientific applications, where reasoning from incomplete information is very common,
is the interaction of containers and their contents. We have developed a preliminary knowledge base for qualitative reasoning about containers, expressed in a sorted first-order language of… Show more

In physical reasoning, humans are often able to carry out useful reasoning based on radically
incomplete information. One physical domain that is ubiquitous both in everyday interactions and in
many kinds of scientific applications, where reasoning from incomplete information is very common,
is the interaction of containers and their contents. We have developed a preliminary knowledge base for qualitative reasoning about containers, expressed in a sorted first-order language of time, geometry, objects, histories, and events. We have demonstrated that the knowledge suffices to justify a number of commonsense physical inferences, based on very incomplete knowledge. Show less

2-dimensional aortic annulus measurements such as average diameter, circumference, and area are significant predictors of post-procedural paravalvular regurgitation in transcather aortic valve replacement (TAVR) procedures. In this paper, we propose an efficient automatic algorithm for obtaining these measurements that uses a modified ellipse-detection form of the Hough transform algorithm. The algorithm is tested using data from 31 TAVR patients. The results demonstrate that our algorithm is… Show more

2-dimensional aortic annulus measurements such as average diameter, circumference, and area are significant predictors of post-procedural paravalvular regurgitation in transcather aortic valve replacement (TAVR) procedures. In this paper, we propose an efficient automatic algorithm for obtaining these measurements that uses a modified ellipse-detection form of the Hough transform algorithm. The algorithm is tested using data from 31 TAVR patients. The results demonstrate that our algorithm is comparable to manual radiologist measurements and offers a fast and consistent method for the quantitative assessment of the aortic annulus. Show less