On the matrix equations AH + HA∗ = A∗H + HA = I

The access box: an ah-ha phenomenon.

Proper access is the basis for all endodontic therapy. This article highlights a teaching tool that powerfully demonstrates to all students and dentists the concept of proper access.

Kennedy terminal ulcer: the "ah-ha!" moment and diagnosis.

The Kennedy Terminal Ulcer (KTU) is an unavoidable skin breakdown or skin failure that occurs as part of the dying process. Research is limited but the literature suggests that KTUs are typically pear-shaped, red/yellow/black, similar in appearance to an abrasion, and tend to occur suddenly in the sacral/coccygeal region not long before death. In this case study, one resident of a long-term car...

The 'Ah Ha!' Moment: When Possible, Answering the Currently Unanswerable using Focused Reasoning

Focused reasoning is a method for continuing a specific inference task as soon as rules or facts which may assist in the reasoning are added to the knowledge base without repeating completed inference, re-posing queries, or performing unnecessary inference. Determining if focused reasoning should commence uses very few computational resources above those used normally to add a term to a knowled...

Chapter 1 Statistical Model Building , Machine Learning , and the Ah - Ha Moment

AH Plus