Study of the social case treatment of nineteen unmarried mothers

Thesis (M.S.)--Boston Universit

Incident Tuberculosis among Recent US Immigrants and Exogenous Reinfection

Mathematical models and molecular epidemiologic investigation support the argument that exogenous reinfection plays an important role in tuberculosis transmission in high-incidence regions. We offer additional data from tuberculosis cases among recent US immigrants which strengthen the claim that reinfection in areas of intense transmission is common

A guide for teaching measurement in the primary grades.

Thesis (M.A.)--Boston Universit

A ‘driving force’ in developing the nation’s forests: The McIntire-Stennis Cooperative Forestry Research Program.

The McIntire-Stennis (M-S) Cooperative Forestry Research Program has provided fundamental support for creating and strengthening forestry research and graduate training efforts at colleges and universities across the nation for nearly 50 years. M-S funding has helped produce thousands of forestry scientists and other research professionals, and M-S–supported research has provided critical basic understanding and applied solutions to extend the benefits that flow from forests and related rangelands across the nation over time. The 1962 legislation that created the M-S program authorized funding of up to one-half of the funds appropriated for federal forestry research conducted directly by the USDA. Throughout the program’s history, however, M-S appropriations have been far below the authorized level. In 2012, the M-S program’s 50th anniversary will be celebrated. Congress and the President therefore have a truly significant “golden anniversary” opportunity to strengthen the nation’s investment in research and training that represents an essential and powerful “driving force behind progress” in sustaining forests for ecological, economic, and social benefits for present and future generations

Analysis of auditory functions in grades one, two, and three.

Thesis (Ed.M.)--Boston Universit

Time- and rate-dependent alterations of the QT interval precede the onset of torsade de pointes in patients with acquired QT prolongation.

Abstract Objectives. The purpose of this study was to determine whether the QT interval dynamics that precede torsade de pointes are consistent with the initiation of this arrhythmia by early afterdepolarization-induced triggered activity. Background. Early afterdepolarization-induced triggered activity has been suggested as an electrophysiologic mechanism for torsade de pointes. Consequently, the initiation of torsade de pointes should involve time- and rate-dependent alterations of ventricular repolarization similar to those known to modulate the development of early afterdepolarizations. Methods. RR and QT intervals were measured in digitized 24-h ambulatory electrocardiographic recordings obtained from seven patients with acquired prolongation of ventricular repolarization. Each patient had one or more episodes of torsade de pointes. The relation between RR and QT intervals was determined before, during and after multiple episodes of torsade de pointes. Results. In patients with multiple episodes of ventricular arrhythmias, the onset of the arrhythmias was associated with a critical prolongation of the QT interval. In some episodes, prolongation of the QT interval was associated with sudden prolongation of the sinus cycle length, whereas in other episodes, the QT interval prolonged progressively at a constant cycle length. Conclusions. The association between a critically prolonged QT interval and the onset of ventricular arrhythmias suggests that the initial complex of torsade de pointes is an early afterdepolarization-induced triggered response. However, prolongation of the QT interval itself was not sufficient to account for the initiation of torsade de pointes, suggesting that other, as yet unidentified factors are required. (J Am Coll Cardiol 1997;30:209–17

Blanche Willis Howard Correspondence

Entries include brief biographies and a personal letter about Howard