Atomic bound state and scattering properties of effective momentum-dependent potentials.

Effective classical dynamics provide a potentially powerful avenue for modeling large-scale dynamical quantum systems. We have examined the accuracy of a Hamiltonian-based approach that employs effective momentum-dependent potentials (MDPs) within a molecular-dynamics framework through studies of atomic ground states, excited states, ionization energies, and scattering properties of continuum states. Working exclusively with the Kirschbaum-Wilets (KW) formulation with empirical MDPs [C.

Three-dimensional solutions of the Boltzmann equation: heat transport at long mean free paths.

A kinetic transport model for arbitrary meshes is presented and the method is applied to heat transfer in a rare gas between parallel plates at different temperatures. The method uses "propagating" rays for tracking the transport of particles throughout the phase space in three-dimensional spatial meshes. Two collision operators are tested with the model, a simple monoenergetic operator and the Bhatnagar-Gross-Krook (BGK) model.

Hypercholesterolemia--a determinant of renal function loss and deaths in IDDM patients with nephropathy.

The development of kidney disease in diabetes mellitus can be viewed as a two-stage process: (1) the development of proteinuria, and (2) its progression to chronic renal failure. Determinants of the latter were examined in 439 IDDM patients who had nephropathy and participated in the Diabetic Retinopathy Study. Using serum creatinine levels obtained during the follow-up period to assess the rate of loss of renal function, we found that only one-third of these patients experienced a rapid loss of function, while the others had slowly declining or unchanging renal function despite the presence of proteinuria and severe diabetic retinopathy.

Coronary artery disease is the major determinant of excess mortality in patients with insulin-dependent diabetes mellitus and persistent proteinuria.

The goal of this review was to assess the magnitude of coronary artery disease (CAD) mortality and its determinants in insulin-dependent diabetes mellitus (IDDM) patients with persistent proteinuria. By reanalyzing data from two previously published studies of patients with nephropathy, it was found that these patients had extremely high CAD mortality rates in comparison with IDDM patients without proteinuria, but only after the age of 35 yr. In addition, the risk of CAD death was associated with high serum cholesterol levels but was unrelated to systemic blood pressure, smoking habits, and obesity.

Excess mortality associated with diuretic therapy in diabetes mellitus.

Objective: To determine whether the high mortality among diabetic patients receiving treatment for hypertension can be explained by associated risk factors or must be attributed to a deleterious effect of antihypertensive treatment.

Design: Cohort analytic study with a median follow-up of 4.5 years.