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Biomedical subjects

D Vanderbilt

Publications and source records attributed to D Vanderbilt.

At least 19 recordsLinked to original sources
PubMed2000

Compositional inversion symmetry breaking in ferroelectric perovskites

Cubic perovskite compounds of the form (A(1/3)A(')(1/3)A(")(1/3))BO3 and A(B(1/3)B(')(1/3)B(")(1/3))O3, in which the differentiated cations form an alternating series of monolayers, are studied using first-principles methods. Such compounds are representative of a possible new class of materials in which ferroelectricity is perturbed by compositional breaking of inversion symmetry. For isovalent substitution the ferroelectric double-well potential becomes asymmetric, so that minority domains may no longer survive. The symmetry breaking is enormously stronger for heterovalent substitution; here the double-well behavior is destroyed. Tuning between these behaviors may allow for the optimization of desired materials properties.

Journal Article↗
PubMed2000

Finite-temperature properties of Pb(Zr1-xTi(x))O3 alloys from first principles

A first-principles-derived approach is developed to study finite-temperature properties of Pb(Zr1-xTix)O3 (PZT) solid solutions near the morphotropic phase boundary (MPB). Structural and piezoelectric predictions are in excellent agreement with experimental data and direct first-principles results. A low-temperature monoclinic phase is confirmed to exist, and is demonstrated to act as a bridge between the well-known tetragonal and rhombohedral phases delimiting the MPB. A successful explanation for the large piezoelectricity found in PZT ceramics is also provided.

Journal Article↗
PubMed1997

Managing skin care with the CareMap system.

In the last three decades, WOC nursing has evolved into on increasingly complex practice. The CareMap is a tool designed to assist in management of patient care. This article defines the CareMap system and describes the development, implementation, and pilot evaluation of a skin care pathway created with the CareMap at Western Pennsylvania Hospital.

Bandages↗
PubMed1995

Evaluating patient care by the use of a diabetic ketoacidosis CareMap in an intensive care unit setting.

The 1990s have seen major changes in the health care delivery system. One of the more useful ones has been the CareMap, an interdisciplinary tool for managing, evaluating and improving patient care. The article discusses the use of a diabetic ketoacidosis CareMap in the medical intensive care unit in a large community hospital. The impact of the CareMap on cost containment and use of resources is also addressed. Although the CareMap represents only one of the many changes that have evolved in the past several years, it is certain to have a critical effect on patient care quality because it combines a variety of disciplines and identifies problem issues that encourage a collaborative approach to patient care.

Adult↗