A synthesis of current knowledge on forests and carbon storage in the United States

2011 ◽  
Vol 21 (6) ◽  
pp. 1902-1924 ◽  
Author(s):  
Duncan C. McKinley ◽  
Michael G. Ryan ◽  
Richard A. Birdsey ◽  
Christian P. Giardina ◽  
Mark E. Harmon ◽  
...  
Keyword(s):  
United States ◽  
Carbon Storage ◽  
Current Knowledge ◽  
The United States

scholarly journals Current knowledge of Chagas-related heart disease among pediatric cardiologists in the United States

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Sanchi Malhotra ◽  
Imran Masood ◽  
Noberto Giglio ◽  
Jay D. Pruetz ◽  
Pia S. Pannaraj
Keyword(s):  
United States ◽  
Differential Diagnosis ◽  
Heart Disease ◽  
Chagas Disease ◽  
Latin American ◽  
Current Knowledge ◽  
Parasitic Infection ◽  
The United States ◽  
Cardiac Complications ◽  
The U.S

Abstract Background Chagas disease is a pathogenic parasitic infection with approximately 8 million cases worldwide and greater than 300,000 cases in the United States (U.S.). Chagas disease can lead to chronic cardiomyopathy and cardiac complications, with variable cardiac presentations in pediatrics making it difficult to recognize. The purpose of our study is to better understand current knowledge and experience with Chagas related heart disease among pediatric cardiologists in the U.S. Methods We prospectively disseminated a 19-question survey to pediatric cardiologists via 3 pediatric cardiology listservs. The survey included questions about demographics, Chagas disease presentation and experience. Results Of 139 responses, 119 cardiologists treat pediatric patients in the U.S. and were included. Most providers (87%) had not seen a case of Chagas disease in their practice; however, 72% also had never tested for it. The majority of knowledge-based questions about Chagas disease cardiac presentations were answered incorrectly, and 85% of providers expressed discomfort with recognizing cardiac presentations in children. Most respondents selected that they would not include Chagas disease on their differential diagnosis for presentations such as conduction anomalies, myocarditis and/or apical aneurysms, but would be more likely to include it if found in a Latin American immigrant. Of respondents, 87% agreed that they would be likely to attend a Chagas disease-related lecture. Conclusions Pediatric cardiologists in the U.S. have seen very few cases of Chagas disease, albeit most have not sent testing or included it in their differential diagnosis. Most individuals agreed that education on Chagas disease would be worth-while.

scholarly journals Baseline and projected future carbon storage and greenhouse-gas fluxes in the Great Plains region of the United States

2011 ◽  
Author(s):  
Michelle Bouchard ◽  
David Butman ◽  
Todd Hawbaker ◽  
Zhengpeng Li ◽  
Jinxun Liu ◽  
...  
Keyword(s):  
United States ◽  
Greenhouse Gas ◽  
Carbon Storage ◽  
Great Plains ◽  
The United States ◽  
Gas Fluxes ◽  
Greenhouse Gas Fluxes

On the synthesis of shear-coupled PL waves

1968 ◽  
Vol 58 (6) ◽  
pp. 1849-1877 ◽  
Author(s):  
Ramesh Chander ◽  
L. E. Alsop ◽  
Jack Oliver
Keyword(s):  
United States ◽  
Phase Velocity ◽  
Travel Time ◽  
Current Knowledge ◽  
Shear Waves ◽  
The United States ◽  
Synthetic Seismograms ◽  
Travel Times ◽  
Precise Knowledge ◽  
S Curve

ABSTRACT Using the shear-coupled PL wave hypothesis of Oliver as a basis, a method is developed for computing synthetic long-period seismograms between the onset of the initial S-type body phase and the beginning of surface waves. Comparison of observed and synthetic siesmograms shows that this hypothesis can explain, in considerable detail, most of the waves with periods greater than about 20 sec recorded during this interval. The synthetic seismograms are computed easily on a small digital computer; they resemble the observed seismograms much more closely than the synthetic seismograms obtained through the superposition of normal modes of the Earth that have been reported in the literature. The synthesis of shear-coupled PL waves depends on a precise knowledge of the phase-velocity curve of the PL wave and travel-time curves of shear waves. Hence, in principle, if one of these quantities is well-known the other can be determined by this method. Phase-velocity curves of the PL wave are determined for the Baltic shield, the Russian platform, the Canadian shield, the United States, and the western North-Atlantic ocean, on the assumption that J-B travel-time curves of shear waves apply to these areas. These dispersion curves show the type of variations to be expected on the basis of the current knowledge of the crustal structures in these areas. Examples are presented to show that J-B travel-times of shear waves along paths between Kenai Peninsula, Alaska and Palisades, equatorial mid-Atlantic ridge and Palisades, and Kurile Islands and Uppsala need to be revised. Shear-wave travel-time curves that are not unique for reasons explained in the study but that give synthetic seismograms in agreement with the observed seismograms were obtained. The new S curves are compared with the J-B travel-time curves for S; and they all predict S waves to arrive later than the time given by J-B tables for epicentral distances smaller than about 30°. The new S curve for the Alaska to Palisades path appears to agree with one of the branches of a multi-branched S curve proposed recently by Ibrahim and Nuttli for the ‘average United States’ insofar as travel-times are concerned, but there are some differences in the slopes of the two curves.

scholarly journals Public perceptions of a rip current hazard education program: “Break the Grip of the Rip!”

2017 ◽  
Vol 17 (7) ◽  
pp. 1003-1024 ◽  
Author(s):  
Chris Houser ◽  
Sarah Trimble ◽  
Robert Brander ◽  
B. Chris Brewster ◽  
Greg Dusek ◽  
...  
Keyword(s):  
United States ◽  
Online Survey ◽  
Social Research ◽  
Current Knowledge ◽  
The United States ◽  
Rip Current ◽  
Rip Currents ◽  
Safety Education ◽  
Large Area ◽  
Education Material

Abstract. Rip currents pose a major global beach hazard; estimates of annual rip-current-related deaths in the United States alone range from 35 to 100 per year. Despite increased social research into beach-goer experience, little is known about levels of rip current knowledge within the general population. This study describes the results of an online survey to determine the extent of rip current knowledge across the United States, with the aim of improving and enhancing existing beach safety education material. Results suggest that the US-based Break the Grip of the Rip!® campaign has been successful in educating the public about rip current safety directly or indirectly, with the majority of respondents able to provide an accurate description of how to escape a rip current. However, the success of the campaign is limited by discrepancies between personal observations at the beach and rip forecasts that are broadcasted for a large area and time. It was the infrequent beach user that identified the largest discrepancies between the forecast and their observations. Since infrequent beach users also do not seek out lifeguards or take the same precautions as frequent beach users, it is argued that they are also at greatest risk of being caught in a dangerous situation. Results of this study suggest a need for the national campaign to provide greater focus on locally specific and verified rip forecasts and signage in coordination with lifeguards, but not at the expense of the successful national awareness program.

Food (In)Security

2014 ◽  
Author(s):  
Maryah Stella Fram
Keyword(s):  
United States ◽  
Food Insecurity ◽  
Current Knowledge ◽  
The United States ◽  
Community Context ◽  
Economic Factors ◽  
Gender Culture ◽  
United States Food ◽  
States Food ◽  
Policies And Programs

This entry provides an overview of current knowledge and thinking about the nature, causes, and consequences of food insecurity as well as information about the major policies and programs aimed at alleviating food insecurity in the United States. Food insecurity is considered at the nexus of person and environment, with discussion focusing on the biological, psychological, social, and economic factors that are interwoven with people’s access to and utilization of food. The diversity of experiences of food insecurity is addressed, with attention to issues of age, gender, culture, and community context. Finally, implications for social work professionals are suggested.

scholarly journals Aging and Disability Among Hispanics in the United States: Current Knowledge and Future Directions

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
Marc A Garcia ◽  
Brian Downer ◽  
Michael Crowe ◽  
Kyriakos S Markides
Keyword(s):  
United States ◽  
Risk Factors ◽  
Life Expectancy ◽  
Literature Review ◽  
Old Age ◽  
Current Knowledge ◽  
The United States ◽  
Life Course Perspective ◽  
Future Research ◽  
Minority Population

Abstract Background and Objectives Hispanics are the most rapidly aging minority population in the United States. Our objective is to provide a summary of current knowledge regarding disability among Hispanics, and to propose an agenda for future research. Research Design and Methods A literature review was conducted to identify major areas of research. A life course perspective and the Hispanic Paradox were used as frameworks for the literature review and for identifying future areas of research. Results Four research areas were identified: (1) Ethnic disparities in disability; (2) Heterogeneity of the U.S. older Hispanic population; (3) Risk factors for disability; and (4) Disabled life expectancy. Older Hispanics are more likely than non-Hispanic whites to be disabled or to become disabled. Disability varied by country of origin, nativity, age of migration, and duration in the United States. Important risk factors for disability included chronic health conditions, depression, and cognitive impairment. Protective factors included positive affect and physical activity. Older Hispanics have longer life expectancy than non-Hispanic whites but spend a greater proportion of old age disabled. Future research should continue to monitor trends in disability as younger generations of Hispanics reach old age. Attention needs to be given to regional variation within the United States for disability prevalence, early-life risk factors, and factors that may contribute to variation in disabled life expectancy. There is also an urgent need for interventions that can effectively prevent or delay the onset of disability in older Hispanics. Discussion and Implications Considerable research has examined disability among older Hispanics, but continued research is needed. It is important that research findings be used to inform public policies that can address the burden of disability for older Hispanic populations.

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