OBJECTIVES To compare failure rates between short and long cephalomedullary nails used for the treatment of intertrochanteric hip fractures in patients over 65 years of age. DESIGN Retrospective cohort study. Data were collected from medical records and radiographs. SETTING Three level 1 trauma centers. PATIENTS/PARTICIPANTS Patients aged 65 years or older who underwent treatment of an in...

We investigate large sieve inequalities such as 1 m m X j=1 log P e j C 2 Z 2 0 log e P e d ; where is convex and increasing, P is a polynomial or an exponential of a potential, and the constant C depends on the degree of P , and the distribution of the points 0 1 < 2 < < m 2 . The method allows greater generality and is in some ways simpler than earlier ones. We apply our results to estimate t...

Refined Kerr electrooptical fringe-pattern methods are used to study time and space variations in the electric field between the electrodes of parallel-plate capacitors filled with liquid nitrobenzene. Photographs of fringe-pattern data recorded during application of high direct (both positive and negative) and sinusoidal voltages, ranging in frequency from 40 to 200 Hz, are compiled to enable ...

Responding to the call for more research on the practice of evaluation and its link to theory, this article uses the interviews conducted with exemplary evaluators or exemplars in the American Journal of Evaluation as cases to describe and analyze the practice of exemplary evaluators. Dimensions of analysis included context, purpose, advance organizers, breadth and depth of stakeholder involvem...

The mature human immunodeficiency virus (HIV-1) envelope glycoprotein (Env) trimer is produced by proteolytic cleavage of a precursor and consists of three gp120 exterior and three gp41 transmembrane subunits. The metastable Env complex is induced to undergo conformational changes required for virus entry by the binding of gp120 to the receptors, CD4 and CCR5/CXCR4. An isoleucine-to-proline cha...

Geographic and temporal variation in occurrence of dementia within the US has received little attention despite its importance for generation of new etiologic hypotheses and health services research. We examine methodological problems in the use of vital statistics data for assessing variation over time, among states and within states in the US. We analyzed the US multiple cause of death files ...

the pr esent s t udy indicate s an incidence of 1/1200 cys t. i,c fi brotic (cf) pat i ent s among hospi taliz ed children. it als o r e ports the reliability o f i nstrumental neutron a c - tivation a na lys i s (naa) method in t he di agnos i s of cf pati ents. there was no ove r l apping o f t h e results o f na il sod i um conc en t r a t ion i n cp pat ients and ror mal conr.roi s (mean 11...