The behavioural theory of Willems exploits the correspondence between the algebraic properties of the module describing the behaviour and the properties of the behaviour. For excellent introductions to the behavioural theory in the 1 D case and the n D case, we refer the reader to Polderman & Willems (1998) and Pillai & Shankar (1998), respectively. As opposed to the case of 1 D linear dynamica...

UNLABELLED Dental age is important for treatment planning in the specialities of pedodontics and orthodontics. Although, Demirjian's method was considered standard for dental age estimation, it may not be reliable for all population. AIM The goal of the study was to evaluate the reliability of Demir-jian's, Haavikko's and Willems method of dental age estimation methods in Visakhapatnam (Andhr...

BACKGROUND The accuracy of radiographic methods for dental age estimation is important for biological growth research and forensic applications. Accuracy of the two most commonly used systems (Demirjian and Willems) has been evaluated with conflicting results. This study investigates the accuracies of these methods for dental age estimation in different populations. METHODS A search of PubMed...

Salal Humair Harvard School of Public Health, Boston, MA 02115, School of Science and Engineering, Lahore University of Management Sciences, Lahore, Pakistan, [email protected] John Ruark Logility, Inc., 8 New England Executive Park, Burlington, MA 01803, [email protected] Brian Tomlin Tuck School of Business at Dartmouth, 100 Tuck Hall, Hanover, NH 03755, [email protected]...