In this article we employ a technique originated by Enflo in 1998 and later modified by the authors to study the hyperinvariant subspace problem for subnormal operators. We show that every “normalized” subnormal operator S such that either {(S∗nSn)1/n} does not converge in the SOT to the identity operator or {(SnS∗n)1/n} does not converge in the SOT to zero has a nontrivial hyperinvariant subsp...

OBJECTIVES To assess growth outcomes of VLBW infants using different growth references and to validate the practice of age adjustment for prematurity in the growth assessment for VLBW infants. METHODS Longitudinal growth data of 514 VLBW infants from 4 to 36 months of adjusted age were analyzed separately based on chronological and adjusted age and by comparison with three growth references. ...

A cytogenetic survey of the complete population of mentally subnormal in the North-East of Scotland has been undertaken. A register for the mentally subnormal within the region already existed, and all persons recorded, whether they resided at home or in subnormality hospitals or other institutional care, were included. The total number recorded was 3020 and of these 2770 were examined cytologi...

PURPOSE To test the hypothesis that subnormal retinal oxygenation response (DeltaPo2) found at 3 months of experimental diabetes is associated with cellular swelling and increased retinal thickness. METHODS Two groups of animals were studied: control rats injected intraperitoneally with either 15% body weight of saline or distilled water (cellular swelling model) or with intravitreal N-methyl...

OBJECTIVE To determine the prevalence of subnormal testosterone concentrations in patients with obesity and with type 2 diabetes in a primary care clinic population. RESEARCH DESIGN AND METHODS Free testosterone concentrations of 1,849 men (1,451 nondiabetic and 398 diabetic) in the Hypogonadism In Males (HIM) study were analyzed. The HIM study was a U.S.-based cross-sectional study designed ...