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Full-Text Articles in Physical Sciences and Mathematics

Measuring Circuit Splits: A Cautionary Note, Aaron-Andrew P. Bruhl Sep 2019

Measuring Circuit Splits: A Cautionary Note, Aaron-Andrew P. Bruhl

Aaron-Andrew P. Bruhl

A number of researchers have recently published new measures of the Supreme Court’s behavior in resolving conflicts in the lower courts. These new measures represent an improvement over prior, cruder approaches, but it turns out that measuring the Court’s resolutions of conflicts is surprisingly difficult. The aim of this methodological comment is to describe those difficulties and to establish several conclusions that follow from them. First, the new measures of the Court’s behavior are certainly imprecise and may reflect biased samples. Second, using the Supreme Court Database, which some studies rely on to assemble a dataset of cases resolving conflicts, …


Changes In Severe Thunderstorm Environment Frequency During The 21st Century Caused By Anthropogenically Enhanced Global Radiative Forcing, Robert J. Trapp, Noah S. Diffenbaugh, Harold E. Brooks, Michael E. Baldwin, Eric D. Robinson, Jeremy S. Pal Sep 2017

Changes In Severe Thunderstorm Environment Frequency During The 21st Century Caused By Anthropogenically Enhanced Global Radiative Forcing, Robert J. Trapp, Noah S. Diffenbaugh, Harold E. Brooks, Michael E. Baldwin, Eric D. Robinson, Jeremy S. Pal

Jeremy Pal

Severe thunderstorms comprise an extreme class of deep convective clouds and produce high-impact weather such as destructive surface winds, hail, and tornadoes. This study addresses the question of how severe thunderstorm frequency in the United States might change because of enhanced global radiative forcing associated with elevated greenhouse gas concentrations. We use global climate models and a high-resolution regional climate model to examine the larger-scale (or “environmental”) meteorological conditions that foster severe thunderstorm formation. Across this model suite, we find a net increase during the late 21st century in the number of days in which these severe thunderstorm environmental conditions …


Effects Of Cost Sharing On Seeking Care For Serious And Minor Symptoms. Results Of A Randomized Controlled Trial, Martin Shapiro, John Ware, Cathy Sherbourne Dec 2015

Effects Of Cost Sharing On Seeking Care For Serious And Minor Symptoms. Results Of A Randomized Controlled Trial, Martin Shapiro, John Ware, Cathy Sherbourne

Martin Shapiro

To estimate the effect of cost sharing on seeking care for serious and minor symptoms, we analyzed data for 3539 persons aged 17 to 61 from the Rand Health Insurance Experiment. Participants were randomly assigned to a free-care group or to insurance plans requiring them to pay part of the costs (cost-sharing group). Annual surveys were administered to determine if participants had serious and minor symptoms during the preceding month and whether they saw a physician. Serious symptoms were judged by a panel of physicians to warrant care in most instances; minor symptoms were judged neither to be severe nor …


Trends In The Prevalence And Mortality Of Cognitive Impairment In The United States: Is There Evidence Of A Compression Of Cognitive Morbidity, Kenneth Langa, Eric Larson, Jason Karlawish, David Cutler, Mohammed Kabeto, Scott Kim, Allison Rosen Nov 2014

Trends In The Prevalence And Mortality Of Cognitive Impairment In The United States: Is There Evidence Of A Compression Of Cognitive Morbidity, Kenneth Langa, Eric Larson, Jason Karlawish, David Cutler, Mohammed Kabeto, Scott Kim, Allison Rosen

Jason Karlawish

BACKGROUND: Recent medical, demographic, and social trends might have had an important impact on the cognitive health of older adults. To assess the impact of these multiple trends, we compared the prevalence and 2-year mortality of cognitive impairment (CI) consistent with dementia in the United States in 1993 to 1995 and 2002 to 2004. METHODS: We used data from the Health and Retirement Study (HRS), a nationally representative population-based longitudinal survey of U.S. adults. Individuals aged 70 years or older from the 1993 (N = 7,406) and 2002 (N = 7,104) waves of the HRS were included. CI was determined …


Striving For Cultural Competence In An Hiv Program: The Transformative Impact Of A Microsystem In A Larger Health Network, Judith N Sabino, Timothy Friel, Lynn Deitrick, Debbie Salas-Lopez Sep 2014

Striving For Cultural Competence In An Hiv Program: The Transformative Impact Of A Microsystem In A Larger Health Network, Judith N Sabino, Timothy Friel, Lynn Deitrick, Debbie Salas-Lopez

Debbie Salas-Lopez MD, MPH

No abstract provided.


Dod Cyber Technology Policies To Secure Automated Information Systems, Maurice E. Dawson Jr., Miguel Crespo, Stephen Brewster Dec 2012

Dod Cyber Technology Policies To Secure Automated Information Systems, Maurice E. Dawson Jr., Miguel Crespo, Stephen Brewster

Maurice Dawson

Availability, integrity, and confidentiality (AIC) is a key theme everywhere as cyber security has become more than an emerging topic. The Department of Defense (DoD) has implemented multiple processes such as the Department of Defense information assurance certification and accreditation process (DIACAP), common criteria (CC), and created proven baselines to include information assurance (IA) controls to protect information system (IS) resources. The aim of this research study shall provide insight to the applicable processes, IA controls, and standards to include providing a method for selecting necessary government models and for system development.


Water Law In The United States And Brazil - Climate Change And Two Approaches To Emerging Water Poverty, David N. Cassuto, Rômulo S. R. Sampaio Oct 2012

Water Law In The United States And Brazil - Climate Change And Two Approaches To Emerging Water Poverty, David N. Cassuto, Rômulo S. R. Sampaio

David N Cassuto

This article examines two of the major water legal regimes in theAmericas—that of Brazil and the United States. Both countries haveextensive wet and dry regions and both hydro-regimes face a significantthreat from global warming. Brazil, for instance, is home to betweeneight and fifteen percent of the world’s fresh water, and its fast-growingeconomy and population present major challenges in management andallocation. The U.S. also faces major water allocation problems resultingfrom past settlement policies; unsustainable reclamation projects; andalso fast-growing domestic, industrial and agricultural demand. In the United States, water has traditionally been perceived as arenewable and limitless resource, a cultural legacy that …


Adjusting Medicare Capitation Payments Using Prior Hospitalization Data, Arlene Ash, Frank Porell, Leonard Gruenberg, Eric Sawitz, Alexa Beiser Dec 2011

Adjusting Medicare Capitation Payments Using Prior Hospitalization Data, Arlene Ash, Frank Porell, Leonard Gruenberg, Eric Sawitz, Alexa Beiser

Frank Porell

The diagnostic cost group approach to a reimbursement model for health maintenance organizations is presented. Diagnostic information about previous hospitalizations is used to create empirically determined risk groups, using only diagnoses involving little or no discretion in the decision to hospitalize. Diagnostic cost group and other models (including Medicare's current formula and other prior-use models) are tested for their ability to predict future costs, using R2 values and new measures of predictive performance. The diagnostic cost group models perform relatively well with respect to a range of criteria, including administrative feasibility, resistance to provider manipulation, and statistical accuracy.