630 research outputs found
Failure to Protect: Why the Individual Insurance Market Is Not a Viable Option for Most U.S. Families
Based on the Commonwealth Fund 2007 Biennial Health Insurance Survey, examines access to and affordability of individual insurance. Reviews obstacles to obtaining coverage, such as health issues and costs, and out-of-pocket costs of those who obtain it
Squeezed: Why Rising Exposure to Health Care Costs Threatens the Health and Financial Well-Being of American Families
Examines U.S. healthcare costs compared with other industrialized countries, individual health insurance coverage, individual market regulations, and the impact of high deductible plans on the health of individuals with chronic disease
Extending the Globular Cluster System-Halo Mass Relation to the Lowest Galaxy Masses
High mass galaxies, with halo masses , reveal
a remarkable near-linear relation between their globular cluster (GC) system
mass and their host galaxy halo mass. Extending this relation to the mass range
of dwarf galaxies has been problematic due to the difficulty in measuring
independent halo masses. Here we derive new halo masses based on stellar and HI
gas kinematics for a sample of nearby dwarf galaxies with GC systems. We find
that the GC system mass--halo mass relation for galaxies populated by GCs holds
from halo masses of down to below
, although there is a substantial increase in scatter
towards low masses. In particular, three well-studied ultra diffuse galaxies,
with dwarf-like stellar masses, reveal a wide range in their GC-to-halo mass
ratios. We compare our GC system--halo mass relation to the recent model of El
Badry et al., finding that their fiducial model does not reproduce our data in
the low mass regime. This may suggest that GC formation needs to be more
efficient than assumed in their model, or it may be due to the onset of
stochastic GC occupation in low mass halos. Finally, we briefly discuss the
stellar mass-halo mass relation for our low mass galaxies with GCs, and we
suggest some nearby dwarf galaxies for which searches for GCs may be fruitful.Comment: 16 pages, 5 figures, accepted for publication in MNRA
Out of Options: Why So Many Workers in Small Businesses Lack Affordable Health Insurance, and How Health Care Reform Can Help
Based on the 2007 Commonwealth Fund Biennial Health Insurance Survey, examines small business employees' limited access to health insurance and contributing factors. Explores how small businesses and employees could benefit from proposed reforms
Losing Ground: How the Loss of Adequate Health Insurance Is Burdening Working Families: Findings From the Commonwealth Fund Biennial Health Insurance Surveys, 2001-2007
Highlights declining health coverage and rising deductibles for American adults and the implications for medical costs, debt burdens, and access to health care. Examines socioeconomic and demographic characteristics of the uninsured and underinsured
Gaps in Health Insurance: An All-American Problem
Presents findings from a survey that examines health insurance coverage, rising healthcare costs, and the health and financial consequences to families that experience breaks in insurance
Rite of Passage? Why Young Adults Become Uninsured and How New Policies Can Help
Assesses the scope of the health insurance problem facing young adults, its causes and implications, and offers policy changes that could help them stay insured as they make the transition to independent living
Health Coverage for Aging Baby Boomers: Findings From The Commonwealth Fund Survey of Older Adults
Examines healthcare quality and access by baby boomers in working families. Offers recommendations for expanding coverage, including options for savings accounts and early participation in Medicare
Observational constraints on stellar feedback in dwarf galaxies
Feedback to the interstellar medium (ISM) from ionising radiation, stellar
winds and supernovae is central to regulating star formation in galaxies. Due
to their low mass (\,M), dwarf galaxies are
particularly susceptible to such processes, making them ideal sites to study
the detailed physics of feedback. In this perspective, we summarise the latest
observational evidences for feedback from star forming regions and how this
drives the formation of 'superbubbles' and galaxy-wide winds. We discuss the
important role of external ionising radiation -- 'reionisation' -- for the
smallest galaxies. And, we discuss the observational evidences that this
feedback directly impacts galaxy properties such as their star formation
histories, metal content, colours, sizes, morphologies and even their inner
dark matter densities. We conclude with a look to the future, summarising the
key questions that remain unanswered and listing some of the outstanding
challenges for galaxy formation theories.Comment: Invited Perspective article, accepted for publication in Nature
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