The Voorhees/Buckley swap method is useful for comparing the discrimination power of Information Retrieval (IR) and Question Answering (QA) metrics. Given a test collection, a set of runs and an evaluation metric, it derives the swap rate, the chance of observing inconsistencies when two completely different topic sets are used for comparing a pair of runs. Recently, however, Sanderson and Zobe...

In this paper, we extend the second and third order classical central schemes for the hyperbolic conservation laws to solve the modified Buckley-Leverett (MBL) equation which is of pseudo-parabolic type. The MBL equation describes two-phase flow in porous media, and it differs from the classical Buckley-Leverett (BL) equation by including a balanced diffusive-dispersive combination. The classic...

We examined the relationship between a remote history of concussions with current symptoms of depression in retired professional athletes. Thirty retired National Football League (NFL) athletes with a history of concussion and 29 age- and IQ-matched controls without a history of concussion were recruited. We found a significant correlation between the number of lifetime concussions and depressi...

The Riemann initial value problem is studied for scalar conservation laws whose uxes have a single innection point. For a regularization consisting of balanced diiusive and dispersive terms, the traveling wave criterion is used to select admissible shocks. In some cases, the Riemann problem solution contains an undercompressive shock. The analysis is illustrated by exploring parameter space for...

The Supreme Court’s “one person, one vote” standard imposes a measure of equality onto any individual’s ability to influence an election’s outcome. The Court has been reluctant to attach this standard to other election resources, like campaign expenditures, despite the fear that money will bring about the appearance of impropriety in democratic decision making. Recently, the Court reasserted th...

From the Department of Psychiatry, Medical College of Georgia, Augusta. The curriculum roundtable “The Art and Science of Switching Antipsychotic Medications” was held January 21, 2006, in Atlanta, Ga., and supported by an educational grant from Bristol-Myers Squibb Company and Otsuka America Pharmaceutical, Inc. Dr. Buckley is a consultant for Abbott, Alamo, AstraZeneca, Bristol-Myers Squibb, ...

This paper analyzes three bills to reform the food stamp program: S.2451, sponsored by Senators McGovern and Dole; S.2537, the Administration's proposal; and S.1993, sponsored by Senator Buckley. The most important provisions of these reform bills are summarized and evaluated, emphasizing proposed income maximums for eligibility and changes in benefit levels. Then the impacts of each bill on se...

This paper compares 14 information retrieval metrics based on graded relevance, together with 10 traditional metrics based on binary relevance, in terms of stability, sensitivity and resemblance of system rankings. More specifically, we compare these metrics using the Buckley/Voorhees stability method, the Voorhees/Buckley swap method and Kendall’s rank correlation, with three data sets compris...