This paper presents a theoretical model for studying the dynamics of ordering in alloys which exhibit modulated phases. The model is different from the standard time-dependent Ginzburg-Landau description of the evolution of a non-conserved order parameter and resembles the Swift-Hohenberg model. The early-stage growth kinetics is analyzed and compared to the Cahn-Hilliard theory of continuous o...

We establish existence and non-existence results for entire solutions to the fractional Allen-Cahn equation in R, which vanish on helicoids and are invariant under screw-motion. In addition, we prove that helicoids are surfaces with vanishing nonlocal mean curvature.

We study the effect of a higher-order nonlinearity in the standard Kuramoto-Sivashinsky equation: partial differentialxG(Hx). We find that the stability of steady states depends on dv/dq , the derivative of the interface velocity on the wave vector q of the steady state. If the standard nonlinearity vanishes, coarsening is possible, in principle, only if G is an odd function of Hx. In this case...

Based on data for private wage and salary workers in May 1988, this article examined pension coverage under two types of employer-sponsored pension plans. Some of the factors associated with employer-financed pension coverage were also examined, and comparisons were made to findings on pension coverage of full-time workers in 1972, 1979, and 1983. "Covered" workers were defined as those actuall...

The production task queue has a great significance for manufacturing resource allocation and scheduling decision. Man-made qualitative queue optimization method has a poor effect and makes the application difficult. A production task queue optimization method is proposed based on multi-attribute evaluation. According to the task attributes, the hierarchical multi-attribute model is established ...

HEALTH CARE REIMBURSEMENT IS RAPIDLY evolving from primarily fee-for-service to value-based, risksharing accountable care contracts. Health systems with employed physicians primarily paid on productivity-based compensation plans face the challenge of aligning their physicians’ financial incentives with the new market requirements for quality, outcomes and patient experience. Health systems will...

T HERE are now 13 million persons aged 65 or over in the United States; about 4 million are working or are the wives of working men, and about 9 million are without income from current w0rk.l In 25 years, those aged 65 or over may total 20 million, and if the proportion not working remains the same, there will then be 14 million aged persons without income from work. Some retired persons depend...