3,257 research outputs found
Stand Up, Speak Out: The Practice and Ethics of Public Speaking
Stand Up, Speak Out: The Practice and Ethics of Public Speaking is an open textbook adapted by University of Wisconsin-Milwaukee (UWM) authors for public speaking courses at UWM. The original work was produced under a Creative Commons license (CC BY-NA-SA) in 2011 by a publisher who has requested that they and the original author not receive attribution. The UWM edition is adapted from the University of Minnesota Libraries Publishing.https://dc.uwm.edu/comm_facbooks/1000/thumbnail.jp
Cardiovascular Disease within Native American Populations
Native American populations have been experiencing a rise in chronic illnesses and social pathologies. The Indian Health Service (IHS) is the primary provider of health care to a majority of Native Americans. Cardiovascular Disease is the leading cause of death among Native American men and women in a majority of tribes. Despite efforts by the IHS this once uncommon disease rapidly increasing in native American groups. Many believe that the acculturation of western lifestyles and changes in diet are contributing factors to the increase in heart disease. They contend that the cause lies in the prevalence of associated risk factors that have increased in native groups through circumstances of habit or necessity. Inadequate congressional funding and other barriers to service have limited the type and extent of services on reservations and in urban settings. The purpose of this independent study was to review and summarize the current available literature on cardiac disease and its associated risk factors, within Native American populations, and methods of intervention were discussed
Protoplanetary Disks in Ophiuchus as Seen From ALMA
We present a high angular resolution (), high
sensitivity ( mJy) survey of the 870 m continuum emission
from the circumstellar material around 49 pre-main sequence stars in the
Ophiuchus molecular cloud. Because most millimeter instruments have resided in
the northern hemisphere, this represents the largest high-resolution,
millimeter-wave survey of the circumstellar disk content of this cloud. Our
survey of 49 systems comprises 63 stars; we detect disks associated with 29
single sources, 11 binaries, 3 triple systems and 4 transition disks. We
present flux and radius distributions for these systems; in particular, this is
the first presentation of a reasonably complete probability distribution of
disk radii at millimeter-wavelengths. We also compare the flux distribution of
these protoplanetary disks with that of the disk population of the
Taurus-Auriga molecular cloud. We find that disks in binaries are both
significantly smaller and have much less flux than their counterparts around
isolated stars. We compute truncation calculations on our binary sources and
find that these disks are too small to have been affected by tidal truncation
and posit some explanations for this. Lastly, our survey found 3 candidate
gapped disks, one of which is a newly identified transition disk with no
signature of a dip in infrared excess in extant observations.Comment: 26 pages, 16 figures. Accepted for publication in Ap
The VLA/ALMA Nascent Disk and Multiplicity (VANDAM) Survey of Perseus Protostars. VI. Characterizing the Formation Mechanism for Close Multiple Systems
We present Atacama Large Millimeter/submillimeter Array (ALMA) observations
of multiple protostar systems in the Perseus molecular cloud previously
detected by the Karl G. Jansky Very Large Array (VLA). We observed 17 close
(600~AU separation) multiple systems at 1.3~mm in continuum and five
molecular lines (i.e., \twco, \cateo, \thco, HCO, SO) to characterize the
circum-multiple environments in which these systems are forming. We detect at
least one component in the continuum for the 17 multiple systems. In three
systems, one companion is not detected, and for two systems the companions are
unresolved at our observed resolution. We also detect circum-multiple dust
emission toward 8 out of 9 Class 0 multiples. Circum-multiple dust emission is
not detected toward any of the 8 Class I multiples. Twelve systems are detected
in the dense gas tracers toward their disks/inner envelopes. For these 12
systems, we use the dense gas observations to characterize their formation
mechanism. The velocity gradients in the circum-multiple gas are clearly
orthogonal to the outflow directions in 8 out of the 12 systems, consistent
with disk fragmentation. Moreover, only two systems with separations 200~AU
are \textit{inconsistent} with disk fragmentation, in addition to the two
widest systems (500~AU). Our results suggest that disk fragmentation via
gravitational instability is an important formation mechanism for close
multiple systems, but further statistics are needed to better determine the
relative fraction formed via this method.Comment: 48 Pages, 26 Figures, 7 Tables, Accepted by Ap
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