7,666 research outputs found
Tidal freshwater ecosystems: bibliography
Tidal freshwater ecosystems represent an important transition zone between saline reaches of estuaries and non-tidal riverine environments. Tidal freshwater systems are distributed worldwide, but have been intensively studied in only a few geographic regions, such as the U.S. east coast and western Europe. Typically, tidal freshwater systems are characterized by high physical stress due to sediment instability and tidal action, which results in low species diversity. However, a number of anadromous and resident fish species utilize tidal freshwater reaches of estuaries as a spawning and nursery area, including economically significant species such as striped bass, American shad, and Atlantic sturgeon. Tidal freshwater marshes are a unique wetland community type, and are utilized extensively by migratory and wading bird species. Much of the research conducted in tidal freshwater ecosystems, particularly in the mid-Atlantic region of the U.S., has focused on the ecology of tidal freshwater marshes.
The existing literature on tidal freshwater ecosystems is scattered among numerous technical journals spanning a variety of scientific disciplines. A considerable body of gray literature, in the form of agency and institutional reports, is available. We have included both the primary and grey literature in our compilation, and indexed the body of work by author and subject. We hope that this resource will benefit current and future scientists and resource managers working in tidal freshwater ecosystems
Impact of modulation on CMB B-mode polarization experiments
We investigate the impact of both slow and fast polarization modulation
strategies on the science return of upcoming ground-based experiments aimed at
measuring the B-mode polarization of the CMB. Using simulations of the Clover
experiment, we compare the ability of modulated and un-modulated observations
to recover the signature of gravitational waves in the polarized CMB sky in the
presence of a number of anticipated systematic effects. The general
expectations that fast modulation is helpful in mitigating low-frequency
detector noise, and that the additional redundancy in the projection of the
instrument's polarization sensitivity directions onto the sky when modulating
reduces the impact of instrumental polarization, are borne out by our
simulations. Neither low-frequency polarized atmospheric fluctuations nor
systematic errors in the polarization sensitivity directions are mitigated by
modulation. Additionally, we find no significant reduction in the effect of
pointing errors by modulation. For a Clover-like experiment, pointing jitter
should be negligible but any systematic mis-calibration of the polarization
coordinate reference system results in significant E-B mixing on all angular
scales and will require careful control. We also stress the importance of
combining data from multiple detectors in order to remove the effects of
common-mode systematics (such as 1/f atmospheric noise) on the measured
polarization signal. Finally we compare the performance of our simulated
experiment with the predicted performance from a Fisher analysis. We find good
agreement between the Fisher predictions and the simulations except for the
very largest scales where the power spectrum estimator we have used introduces
additional variance to the B-mode signal recovered from our simulations.Comment: Replaced with version accepted by MNRAS. Analysis of half-wave plate
systematic (differential transmittance) adde
Acute post-disaster medical needs of patients with diabetes: emergency department use in New York City by diabetic adults after Hurricane Sandy.
OBJECTIVE: To evaluate the acute impact of disasters on diabetic patients, we performed a geospatial analysis of emergency department (ED) use by New York City diabetic adults in the week after Hurricane Sandy.
RESEARCH DESIGN AND METHODS: Using an all-payer claims database, we retrospectively analyzed the demographics, insurance status, and medical comorbidities of post-disaster ED patients with diabetes who lived in the most geographically vulnerable areas. We compared the patterns of ED use among diabetic adults in the first week after Hurricane Sandy\u27s landfall to utilization before the disaster in 2012.
RESULTS: In the highest level evacuation zone in New York City, postdisaster increases in ED visits for a primary or secondary diagnosis of diabetes were attributable to a significantly higher proportion of Medicare patients. Emergency visits for a primary diagnosis of diabetes had an increased frequency of certain comorbidities, including hypertension, recent procedure, and chronic skin ulcers. Patients with a history of diabetes visited EDs in increased numbers after Hurricane Sandy for a primary diagnosis of myocardial infarction, prescription refills, drug dependence, dialysis, among other conditions.
CONCLUSIONS: We found that diabetic adults aged 65 years and older are especially at risk for requiring postdisaster emergency care compared to other vulnerable populations. Our findings also suggest that there is a need to support diabetic adults particularly in the week after a disaster by ensuring access to medications, aftercare for patients who had a recent procedure, and optimize their cardiovascular health to reduce the risk of heart attacks
Trauma-informed care in the UK:where are we? A qualitative study of health policies and professional perspectives
BACKGROUND: Trauma-informed (TI) approach is a framework for a system change intervention that transforms the organizational culture and practices to address the high prevalence and impact of trauma on patients and healthcare professionals, and prevents re-traumatization in healthcare services. Review of TI approaches in primary and community mental healthcare identified limited evidence for its effectiveness in the UK, however it is endorsed in various policies. This study aimed to investigate the UK-specific context through exploring how TI approaches are represented in health policies, and how they are understood and implemented by policy makers and healthcare professionals. METHODS: A qualitative study comprising of a document analysis of UK health policies followed by semi-structured interviews with key informants with direct experience of developing and implementing TI approaches. We used the Ready Extract Analyse Distil (READ) approach to guide policy document review, and the framework method to analyse data. RESULTS: We analysed 24 documents and interviewed 11 professionals from healthcare organizations and local authorities. TI approach was included in national, regional and local policies, however, there was no UK- or NHS-wide strategy or legislation, nor funding commitment. Although documents and interviews provided differing interpretations of TI care, they were aligned in describing the integration of TI principles at the system level, contextual tailoring to each organization, and addressing varied challenges within health systems. TI care in the UK has had piecemeal implementation, with a nation-wide strategy and leadership visible in Scotland and Wales and more disjointed implementation in England. Professionals wanted enhanced coordination between organizations and regions. We identified factors affecting implementation of TI approaches at the level of organization (leadership, service user involvement, organizational culture, resource allocation, competing priorities) and wider context (government support, funding). Professionals had conflicting views on the future of TI approaches, however all agreed that government backing is essential for implementing policies into practice. CONCLUSIONS: A coordinated, more centralized strategy and provision for TI healthcare, increased funding for evaluation, and education through professional networks about evidence-based TI health systems can contribute towards evidence-informed policies and implementation of TI approaches in the UK. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12913-022-08461-w
Theology, News and Notes - Vol. 15, No. 02
Theology News & Notes was a theological journal published by Fuller Theological Seminary from 1954 through 2014.https://digitalcommons.fuller.edu/tnn/1034/thumbnail.jp
The Radial Structure of SNR N103B
We report on the results from a Chandra ACIS observation of the young,
compact, supernova remnant N103B. The unprecedented spatial resolution of
Chandra reveals sub-arcsecond structure, both in the brightness and in spectral
variations. Underlying these small-scale variations is a surprisingly simple
radial structure in the equivalent widths of the strong Si and S emission
lines. We investigate these radial variations through spatially resolved
spectroscopy using a plane-parallel, non-equilibrium ionization model with
multiple components. The majority of the emission arises from components with a
temperature of 1 keV: a fully ionized hydrogen component; a high ionization
timescale (n_e*t > 10^12 s cm^-3) component containing Si, S, Ar, Ca, and Fe;
and a low ionization timescale (n_e*t ~ 10^{11} s cm^-3) O, Ne, and Mg
component. To reproduce the strong Fe Kalpha line, it is necessary to include
additional Fe in a hot (> 2 keV), low ionization (n_e*t ~ 10^10.8 s cm^-3)
component. This hot Fe may be in the form of hot Fe bubbles, formed in the
radioactive decay of clumps of 56Ni. We find no radial variation in the
ionization timescales or temperatures of the various components. Rather, the Si
and S equivalent widths increase at large radii because these lines, as well as
those of Ar and Ca, are formed in a shell occupying the outer half of the
remnant. A shell of hot Fe is located interior to this, but there is a large
region of overlap between these two shells. In the inner 30% of the remnant,
there is a core of cooler, 1 keV Fe. We find that the distribution of the
ejecta and the yields of the intermediate mass species are consistent with
model prediction for Type Ia events.Comment: 34 pages, including 7 tables and 7 figures, Accepted by Ap
POPULATION RECOVERY OF THE WHOOPING CRANE WITH EMPHASIS ON REINTRODUCTION EFFORTS: PAST AND FUTURE
The U.S. Fish and Wildlife Service (USFWS) began building a captive whooping crane (Grus americana) colony at Patuxent Wildlife Research Center (patuxent), Maryland, in 1966. From 1976 to 1984, 73 eggs from this colony and 216 eggs from Wood Buffalo National Park (Wood Buffalo), Canada, nests were placed in sandhill crane (G. canadensis) nests at Grays Lake National Wildlife Refuge (Grays Lake), Idaho, the site of the first whooping crane reintroduction attempt. Although 84 chicks fledged from the 289 eggs, the egg transfer program has been discontinued because of inordinately high mortality (only ca. 13 birds remain in the wild in 1991) and lack of breeding in survivors. In recent decades new methods have emerged for introducing captive-produced offspring to the wild. Surrogate studies with sandhill cranes, particularly the endangered Mississippi sandhill cranes (G. c. pulla), have shown that young cranes, raised either by captive, conspecific foster parents, or by costumed humans and in close association with live cranes and lifelike crane taxidermic dummies, have high post-release survival rates. These techniques will likely be used in future Whooping crane reintroduction programs. Current recovery objectives for the Whooping crane include expansion of the 2 captive colonies, establishment of a third captive colony in Canada, and reintroduction of 2 additional wild populations. The Kissimmee Prairie in central Florida has been selected for the next release experiment. Evaluation of this site began in 1984, and risk assessment is expected to begin in 1992 with the transfer and monitoring of a group of captivereared, juvenile whooping cranes. These tests of the environment will, if results are favorable, be followed by a full-scale reintroduction effort of at least 20 birds/year beginning in 1994 or 1995
tele-substitution reactions in the synthesis of a promising class of 1,2,4-Triazolo[4,3- a]pyrazine-based antimalarials
We have discovered and studied a tele-substitution reaction in a biologically important heterocyclic ring system. Conditions that favor the tele-substitution pathway were identified: the use of increased equivalents of the nucleophile or decreased equivalents of base or the use of softer nucleophiles, less polar solvents, and larger halogens on the electrophile. Using results from X-ray crystallographic and isotope labeling experiments, a mechanism for this unusual transformation is proposed. We focused on this triazolopyrazine as it is the core structure of the in vivo active antiplasmodium compounds of Series 4 of the Open Source Malaria consortium. © 2020 American Chemical Society. All rights reserved
Serum Adiponectin is Associated with Adverse Outcomes of Asthma in Men but Not in Women
Background: Murine studies suggest a beneficial effect of systemic adiponectin on asthma. Our objective was to determine the association between serum adiponectin concentrations and asthma control/severity outcomes in men and women separately. Methods: Cross-sectional and longitudinal analyses of data from years 10, 15, and 20 examinations of the prospective coronary artery risk development in young adults study in the United States were performed. Asthma was defined by self-reported provider diagnosis at or prior to year 15 examination. Outcomes included presence of active disease, number of respiratory symptoms, and number of asthma medications; as well as longitudinal decline in absolute FEV1. Year 15 serum adiponectin concentration was the predictor variable. Results: In a multivariable analysis of 411 eligible subjects, after adjusting for body mass index and covariates, higher serum adiponectin concentrations were associated with more frequent active disease (including more frequent use of any asthma medication), and greater number of respiratory symptoms and asthma medications among men but not among women with asthma (p for interactions between sex and adiponectin for all analyses < 0.05). Conclusions: Higher serum adiponectin concentrations may be independently associated with adverse clinical outcomes of asthma in men but not in women. If biological effect is confirmed in future studies, modification of systemic adiponectin concentrations may open up newer ways to treat asthma in men
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