Enhanced molecular dynamics performance with a programmable graphics processor

Design considerations for molecular dynamics algorithms capable of taking advantage of the computational power of a graphics processing unit (GPU) are described. Accommodating the constraints of scalable streaming-multiprocessor hardware necessitates a reformulation of the underlying algorithm. Performance measurements demonstrate the considerable benefit and cost-effectiveness of such an approach, which produces a factor of 2.5 speed improvement over previous work for the case of the soft-sphere potential.Comment: 20 pages (v2: minor additions and changes; v3: corrected typos

The Effect of Firm Bankruptcy on Retiree Benefits, with Applications to the Automotive and Coal Industries

[Excerpt] Benefits for retired employees are of particular interest to policy makers because of the growing number of retirees and forecasts indicating that some future retirees may not have the necessary financial resources to maintain their standards of living. Part of this congressional concern is what happens when bankrupt employers are unable to provide promised pension and health benefits to their retired employees. This report explores the protections of benefits awarded retirees and future retirees of bankrupt private-sector employers under current law. Although there are many types of employee benefits, active employees, retirees, and the employers themselves are often especially concerned with post-retirement pensions and health insurance benefits, usually the two largest components of these so-called legacy costs. This analysis provides examples from two industries of interest to Congress where competitive pressures resulted in changes in each sector’s business outlook: automobiles and coal

An Introduction to Health Insurance: What Should a Consumer Know?

[Excerpt] Congress has seen a renewed interest in questions related to the market for private health insurance since the passage of the Patient Protection and Affordable Care Act (ACA; P.L. 111- 148, as amended). Recent health insurance marketplace changes include a different way to purchase health insurance (exchanges) and a new system of categorizing the generosity of plans’ health coverage based on the names of various metals (e.g., bronze and silver). Some consumers may face different choices of health insurance plans than in the past. Not all consumers are comfortable with the various concepts governing which health insurance plan might be best for them. This report provides an overview of private-sector (as opposed to government-provided) health insurance. It serves as an introduction to health insurance from the point of view of consumers under the age of 65 who purchase a health insurance plan. No background in health insurance is assumed, and all terms are defined. The report therefore can be viewed as an introduction to the more comprehensive discussion of health insurance found in the Congressional Research Service (CRS) health insurance primer

Health Savings Accounts and High- Deductible Health Plans: A Data Primer

[Excerpt] Individuals began establishing health savings accounts (HSAs) in 2004. These savings accounts are generally used to pay for unreimbursed medical expenses on a tax- advantaged basis. Any unspent money accrues to the individual. To open an HSA, the individual must enroll in a qualifying high-deductible health plan (HDHP). HSAs are tax-advantaged and provide some incentives for people to monitor, and perhaps reduce, their expenditures on health care. Data covering enrollment and/or cost sharing during the first few years of HDHPs and their associated HSAs are now available from at least five separate sources. This primer provides information on the data sources, together with the most recent data available from each source on enrollment, premiums and deductibles