Search for eccentric black hole coalescences during the third observing run of LIGO and Virgo

Despite the growing number of confident binary black hole coalescences observed through gravitational waves so far, the astrophysical origin of these binaries remains uncertain. Orbital eccentricity is one of the clearest tracers of binary formation channels. Identifying binary eccentricity, however, remains challenging due to the limited availability of gravitational waveforms that include effects of eccentricity. Here, we present observational results for a waveform-independent search sensitive to eccentric black hole coalescences, covering the third observing run (O3) of the LIGO and Virgo detectors. We identified no new high-significance candidates beyond those that were already identified with searches focusing on quasi-circular binaries. We determine the sensitivity of our search to high-mass (total mass M>70 M⊙) binaries covering eccentricities up to 0.3 at 15 Hz orbital frequency, and use this to compare model predictions to search results. Assuming all detections are indeed quasi-circular, for our fiducial population model, we place an upper limit for the merger rate density of high-mass binaries with eccentricities 0<e≤0.3 at 0.33 Gpc−3 yr−1 at 90\% confidence level

Ultralight vector dark matter search using data from the KAGRA O3GK run

Among the various candidates for dark matter (DM), ultralight vector DM can be probed by laser interferometric gravitational wave detectors through the measurement of oscillating length changes in the arm cavities. In this context, KAGRA has a unique feature due to differing compositions of its mirrors, enhancing the signal of vector DM in the length change in the auxiliary channels. Here we present the result of a search for U(1)B−L gauge boson DM using the KAGRA data from auxiliary length channels during the first joint observation run together with GEO600. By applying our search pipeline, which takes into account the stochastic nature of ultralight DM, upper bounds on the coupling strength between the U(1)B−L gauge boson and ordinary matter are obtained for a range of DM masses. While our constraints are less stringent than those derived from previous experiments, this study demonstrates the applicability of our method to the lower-mass vector DM search, which is made difficult in this measurement by the short observation time compared to the auto-correlation time scale of DM

The Presence Of Hospital-Based Palliative Care Programs: A Resource Dependence Perspective

Background: The presence of hospital-based palliative care programs has risen over time in the United States. Nevertheless, organizational and environmental factors that contribute to the presence of hospital-based palliative care programs are unclear. Purpose: The aim of this study was to examine the role of organizational and environmental factors associated with the presence of hospital-based palliative care programs using resource dependence theory. Methodology: Panel data from 2000 to 2009 American Hospital Association Annual Survey and the Area Resource File were used in this study. A random-effect logistic regression was used to analyze the relationship between organizational and environmental factors and the presence of hospital-based palliative care programs. Findings: Hospitals with higher Medicare inpatient days, located in counties with higher Medicare managed penetration, and larger hospitals had greater odds of having a hospital-based palliative care program. Although hospitals in counties that have a higher percentage of individuals 65 years and older, for-profit and government hospitals were less likely to have a hospital-based palliative care program. Practice Implications: Hospitals will vary in the organizational resources available to them, as such, administrators\u27 awareness of the relationship between resources and palliative care programs can help determine the relevance of a program in their hospital

Incentives for Healthy Behaviors

Objective: Engaging individuals in their own health care proves challenging for policy makers, health plans, and providers. Florida Medicaid introduced the Enhanced Benefits Rewards (EBR) program in 2006, providing financial incentives as rewards to beneficiaries who engage in health care seeking and healthy behaviors. Methods: This study analyzed beneficiary survey data from 2009 to determine predictors associated with awareness of and participation in the EBR program. Results: Non-English speakers, those in a racial and ethnic minority group, those with less than a high school education, and those with limited or no connection to a health care provider were associated with lower awareness of the program. Among those aware of the program, these factors were also associated with reduced likelihood of engaging in the program. Individuals in fair or poor health were also less likely to engage in an approved behavior. Individuals who speak Spanish at home and those without a high school diploma were more likely than other groups to spend their earned program credits. Conclusions: Findings underscore the fact that initial engagement in such a program can prove challenging as different groups are not equally likely to be aware of or participate in an approved activity or redeem a credit. Physicians may play important roles in encouraging participation in programs to incentivize healthy behaviors

Defining Population Health: Leveraging advisory board members’ perspectives to identify health administration curriculum content

Current healthcare reform practices are driving the entire healthcare delivery system toward a population health approach. Health administration programs, both undergraduate and graduate, play an important role in training future leaders of healthcare organizations to engage and thrive in this dynamic environment. The purpose of this research was to engage U.S. healthcare leaders in a dialog on population health and to identify essential concepts appropriate for healthcare administration students\u27 education. As advisory board members represent industry leaders who will employ future graduates, their expertise and suggestions help inform programs on both health management competency and skill-development opportunities. Focus groups comprised of advisory board members from five U.S. health administration programs were conducted. Qualitative analysis of the focus group discussions was performed and themes identified by a consensus process. Results showed convergence on five major population health themes. Study findings provide a practitioner-informed definition for population health and validated recommendations for health management curriculum content via a population health perspective. The identification of key topic areas serves to inform program directors and faculty as they develop knowledge content necessary to best prepare future health administrators in this new population health paradigm