scholarly journals Spatial Analysis of the 2017 Outbreak of Hemorrhagic Disease and Physiographic Region in the Eastern United States

Viruses ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 550
Author(s):  
Christine L. Casey ◽  
Stephen L. Rathbun ◽  
David E. Stallknecht ◽  
Mark G. Ruder
Keyword(s):  
United States ◽  
Regression Models ◽  
The United States ◽  
Hemorrhagic Disease ◽  
Strongly Correlated ◽  
Eastern United States ◽  
Autologistic Regression ◽  
Appalachian Plateau ◽  
Drought Conditions ◽  
Physiographic Regions

Hemorrhagic disease (HD) is considered one of the most significant infectious diseases of white-tailed deer in North America. Investigations into environmental conditions associated with outbreaks suggest drought conditions are strongly correlated with outbreaks in some regions of the United States. However, during 2017, an HD outbreak occurred in the Eastern United States which appeared to be associated with a specific physiographic region, the Appalachian Plateau, and not drought conditions. The objective of this study was to determine if reported HD in white-tailed deer in 2017 was correlated with physiographic region. There were 456 reports of HD from 1605 counties across 26 states and 12 physiographic regions. Of the 93 HD reports confirmed by virus isolation, 76.3% (71/93) were identified as EHDV-2 and 66.2% (47/71) were from the Appalachian Plateau. A report of HD was 4.4 times more likely to occur in the Appalachian Plateau than not in 2017. Autologistic regression models suggested a statistically significant spatial dependence. The underlying factors explaining this correlation are unknown, but may be related to a variety of host, vector, or environmental factors. This unique outbreak and its implications for HD epidemiology highlight the importance for increased surveillance and reporting efforts in the future.

The lasting impact of N.M. Fenneman’s works physiography of the western and eastern United States

2021 ◽  
pp. 030913332110129
Author(s):  
Carol F Sawyer
Keyword(s):  
United States ◽  
The United States ◽  
Western United States ◽  
Eastern United States ◽  
Continued Use ◽  
Physiographic Regions

The publication of Fenneman’s two volumes on physiography: The Physiography of Western United States and the Physiography of Eastern United States, was the culmination of over 20 years of work toward formalization of the physiographic regions in the United States. This paper details the relevant works that predate these volumes, the two volumes themselves, as well as briefly describing Fenneman’s career and the continued use of the works 80 plus years post-publication.

Provenance variation among different populations of Pinusstrobus from Canada and the United States

1987 ◽  
Vol 17 (3) ◽  
pp. 228-235 ◽  
Author(s):  
J. B. Genys
Keyword(s):  
United States ◽  
The United States ◽  
High Elevation ◽  
Strongly Correlated ◽  
Eastern United States ◽  
White Pine ◽  
Seed Sources ◽  
Bud Set ◽  
Different Populations ◽  
Old Trees

Eastern white pine (Pinusstrobus L.), represented by 117 seed sources from different parts of its range in Canada and the United States, was studied for 2 years in a nursery and 14 years at two plantations in Maryland. In the Piedmont Plateau, these populations ranged in survival from 38 to 100%, in height from 3.0 to 8.2 m, and in diameter from 4.3 to 16.8 cm. In the Coastal Plain, they varied in survival from 25 to 100%, in height from 3.0 to 7.8 m, and in diameter from 3.6 to 15.5 cm. Heights and diameters were strongly correlated; both these characteristics were correlated inversely with the latitude (r ranged from −0.38 to −0.67) and directly with the altitude of the seed source (r = 0.22 to 0.31). The latter correlation, however, included a latitudinal component because most high-elevation trees came from the south. Heights in Maryland at 16 years were significantly correlated with heights of similar populations at younger ages studied in 10 other plantations in the eastern United States (r = 0.32 to 0.73) and to the date of bud set by 1-year-old trees (r = 0.23 to 0.51). The most outstanding in growth rate were some sources from Tennessee, Kentucky, and North Carolina. Also, among the northern sources two populations from Norfolk County, Ontario, were distinctly superior.

System-wide seismic vulnerability of aging multiple-span multiple-girder bridges in low-to-moderate seismic hazard regions

2021 ◽  
Vol 37 (1_suppl) ◽  
pp. 1626-1651
Author(s):  
John E Lens M.EERI ◽  
Mandar M Dewoolkar ◽  
Eric M Hernandez M.EERI
Keyword(s):  
United States ◽  
Seismic Hazard ◽  
Cross Sections ◽  
Seismic Vulnerability ◽  
Time History ◽  
The United States ◽  
National Database ◽  
Eastern United States ◽  
Girder Bridges ◽  
The Status

This article describes the approach, methods, and findings of a quantitative analysis of the seismic vulnerability in low-to-moderate seismic hazard regions of the Central and Eastern United States for system-wide assessment of typical multiple span bridges built in the 1950s through the 1960s. There is no national database on the status of seismic vulnerability of bridges, and thus no means to estimate the system-wide damage and retrofit costs for bridges. The study involved 380 nonlinear analyses using actual time-history records matched to four representative low-to-medium hazard target spectra corresponding with peak ground accelerations from approximately 0.06 to 0.3 g. Ground motions were obtained from soft and stiff site seismic classification locations and applied to models of four typical multiple-girder with concrete bent bridges. Multiple-girder bridges are the largest single category, comprising 55% of all multiple span bridges in the United States. Aging and deterioration effects were accounted for using reduced cross-sections representing fully spalled conditions and compared with pristine condition results. The research results indicate that there is an overall low likelihood of significant seismic damage to these typical bridges in such regions, with the caveat that certain bridge features such as more extensive deterioration, large skews, and varied bent heights require bridge-specific analysis. The analysis also excludes potential damage resulting from liquefaction, flow-spreading, or abutment slumping due to weak foundation or abutment soils.

The Western Limit of Iapetan Rifting in the Eastern United States: A New Assessment

2020 ◽  
Vol 91 (6) ◽  
pp. 3483-3495
Author(s):  
Christine A. Powell ◽  
William A. Thomas ◽  
Robert D. Hatcher
Keyword(s):  
United States ◽  
Seismic Hazard ◽  
Atlantic Coastal Plain ◽  
Hazard Evaluation ◽  
Earthquake Activity ◽  
Blue Ridge ◽  
Mantle Structure ◽  
Eastern United States ◽  
Appalachian Plateau ◽  
Lithospheric Thickness

Abstract Specifying the extent and location of rifted, crystalline Precambrian crust in the eastern United States is important for seismic hazard evaluation and for models that relate upper-mantle structure to ancient tectonic features and ongoing tectonism. As currently depicted in the National Seismic Hazard Maps (NSHM), the western limit of Iapetan rifted crust is beneath the Appalachian plateau physiographic province, west of the Valley and Ridge province. New estimates of crustal thickness using EarthScope Transportable Array and other data do not support the presence of rifted crust beneath the Blue Ridge, Valley and Ridge, and Appalachian plateau physiographic provinces. Crustal thicknesses exceed 45 km throughout most of this region. The crust thins to the southeast beneath the southeastern part of the Piedmont physiographic province and is only 36 km thick near the edge of the Atlantic coastal plain. We suggest that the western limit of Iapetan rift-extended crust is east of the Blue Ridge province and is associated with the prominent Appalachian gravity gradient. This location coincides with palinspastic reconstructions based on geologic data for the Iapetan rifted margin. Recognition of thick crust beneath the Blue Ridge and Valley and Ridge provinces, unextended by Iapetan rifting, will support more robust modeling of the effects of mantle structure (such as delamination and abrupt changes in lithospheric thickness) on ongoing tectonism and earthquake activity in the eastern United States and will provide more accurate seismotectonic zonation in the NSHM.

Force, Fraud, and Coercion—What Do They Mean? A Study of Victimization Experiences in a New Destination Latino Sex Trafficking Network

2016 ◽  
Vol 13 (5) ◽  
pp. 456-476 ◽  
Author(s):  
Lauren Copley Sabon
Keyword(s):  
United States ◽  
Law Enforcement ◽  
Social Constructionism ◽  
Sex Trafficking ◽  
The United States ◽  
Social Forces ◽  
Eastern United States ◽  
Latina Immigrants ◽  
Strict Interpretation ◽  
New Destination

In response to increasing Latino new destination migration in the United States, Latino sex trafficking networks have emerged in many of these areas. This article examines victimization experiences of Latina immigrants trafficked by a regional network operating in the Eastern United States drawn from law enforcement records and interviews with legal actors involved in the criminal case. The stories shared with law enforcement by the Latina victims gives insight into their lives, experiences in prostitution, and the operation of a trafficking/prostitution network (all lacking in the literature). Through the analytical frame of social constructionism, this research highlights how strict interpretation of force, fraud, coercion, and agency used to define “severe forms of trafficking” in the TVPA limits its ability to recognize many victimization experiences in trafficking situations at the hands of traffickers. The forms of coercion used in the criminal enterprise under study highlights the numerous ways it can be wielded (even without a physical presence) and its malleability as a concept despite legal definitional rigidity. The lack of legal recognition of the plurality of lived experiences in which agency and choice can be mitigated by social forces, structural violence, intersectional vulnerabilities, and the actions of others contributes to the scholarly critique of issues prosecuting trafficking cases under the TVPA and its strict legal definitions.

Effects of temporal variations in seismicity on seismic hazard

1981 ◽  
Vol 71 (1) ◽  
pp. 321-334
Author(s):  
Robin K. McGuire ◽  
Theodore P. Barnhard
Keyword(s):  
United States ◽  
Seismic Hazard ◽  
Seismic Activity ◽  
Time Window ◽  
Hazard Analysis ◽  
The United States ◽  
Temporal Variations ◽  
Seismogenic Zone ◽  
Eastern United States ◽  
Ground Shaking

abstract The accuracy of stationary mathematical models of seismicity for calculating probabilities of damaging shaking is examined using the history of earthquakes in China from 1350 A.D. to 1949 A.D. During this time, rates of seismic activity varied periodically by a factor of 10. Probabilities of damaging shaking are calculated in 62 cities in North China using 50 yr of earthquake data to estimate seismicity parameters; the probabilities are compared to statistics of damaging shaking in the same cities for 50 yr following the data window. These comparisons indicate that the seismic hazard analysis is accurate if: (1) the maximum possible earthquake size in each seismogenic zone is determined from the entire seismic history rather than from a short-time window; and (2) the future seismic activity can be estimated accurately. The first condition emphasizes the importance of realistically estimating the maximum possible size of earthquakes on faults. The second indicates the need to understand possible trends in seismic activity where these exist, or to develop an earthquake prediction capability with which to estimate future activity. Without the capability of estimating future seismicity, stationary models provide less accurate but generally conservative indications of seismic ground-shaking hazard. In the United States, the available earthquake history is brief but gives no indication of changing rates of activity. The rate of seismic strain release in the Central and Eastern United States has been constant over the last 180 yr, and the geological record of earthquakes on the southern San Andreas Fault indicates no temporal trend for large shocks over the last 15 centuries. Both observations imply that seismic activity is either stationary or of such a long period that it may be treated as stationary for seismic hazard analyses in the United States.

Expanding the Happiness Paradox: Ethnoracial Disparities in Life Satisfaction Among Older Immigrants in the United States

2017 ◽  
Vol 31 (2) ◽  
pp. 231-255
Author(s):  
Rocío Calvo ◽  
Dawn C. Carr ◽  
Christina Matz-Costa
Keyword(s):  
United States ◽  
Life Satisfaction ◽  
Regression Models ◽  
The United States ◽  
Linear Regression Models ◽  
Cross Sectional ◽  
Older Immigrants ◽  
Happiness Paradox ◽  
Retirement Study ◽  
Lower Life Satisfaction

Objective: This study investigated nativity disparities in life satisfaction among ethnoracial groups of older adults in the United States and the factors associated with such disparities. Method: Cross-sectional data from 7,348 respondents aged 60 and older from the 2012/2014 waves of the Health and Retirement Study (HRS) were used to estimate linear regression models. Results: Older immigrants experienced higher levels of life satisfaction than comparable native-born individuals. This “happiness advantage” was particularly salient for Hispanic immigrants, who reported the highest levels of life satisfaction of all groups included in the study. With increasing education, life satisfaction increased for White and “Other Race” groups, regardless of nativity. However, for both Black groups and native-born Hispanics, higher levels of education were associated with lower life satisfaction. Discussion: Findings suggest that the “happiness paradox” may not only be a matter of Hispanic ethnicity, but that it may also extend to immigrants from other ethnoracial backgrounds.

scholarly journals On the probability distribution of daily streamflow in the United States

2017 ◽  
Vol 21 (6) ◽  
pp. 3093-3103 ◽  
Author(s):  
Annalise G. Blum ◽  
Stacey A. Archfield ◽  
Richard M. Vogel
Keyword(s):  
United States ◽  
Probability Distribution ◽  
The United States ◽  
Good Representation ◽  
Lognormal Distributions ◽  
Daily Streamflow ◽  
The Us ◽  
Flow Duration Curves ◽  
A Site ◽  
Physiographic Regions

Abstract. Daily streamflows are often represented by flow duration curves (FDCs), which illustrate the frequency with which flows are equaled or exceeded. FDCs have had broad applications across both operational and research hydrology for decades; however, modeling FDCs has proven elusive. Daily streamflow is a complex time series with flow values ranging over many orders of magnitude. The identification of a probability distribution that can approximate daily streamflow would improve understanding of the behavior of daily flows and the ability to estimate FDCs at ungaged river locations. Comparisons of modeled and empirical FDCs at nearly 400 unregulated, perennial streams illustrate that the four-parameter kappa distribution provides a very good representation of daily streamflow across the majority of physiographic regions in the conterminous United States (US). Further, for some regions of the US, the three-parameter generalized Pareto and lognormal distributions also provide a good approximation to FDCs. Similar results are found for the period of record FDCs, representing the long-term hydrologic regime at a site, and median annual FDCs, representing the behavior of flows in a typical year.

The Origins of Western Dermatology

2010 ◽  
Vol 14 (6) ◽  
pp. 255-266
Author(s):  
J. Barrie Ross
Keyword(s):  
United States ◽  
Eighteenth Century ◽  
Middle Ages ◽  
The United States ◽  
Historical Background ◽  
Eastern United States ◽  
The West ◽  
Defining Moments ◽  
Late Eighteenth Century ◽  
Late Eighteenth

Objective: On the premise that historical background makes the present more understandable, this review covers the origins of Western dermatology from its Greek and Roman origins through the Middle Ages to the defining moments in the late eighteenth century. Background and Conclusion: The development of major European centers at this time became the background for future centers in the eastern United States in the midnineteenth century and, finally, to the West Coast of the United States and Canada by the midtwentieth century.

scholarly journals Long-term trends and drought: spatiotemporal variation in juvenile sex ratios of North American ducks

2021 ◽  
Author(s):  
Sage Ellis ◽  
Madeleine Lohman ◽  
James Sedinger ◽  
Perry Williams ◽  
Thomas Riecke
Keyword(s):  
United States ◽  
North American ◽  
Sex Ratios ◽  
Survival Rates ◽  
The United States ◽  
Avian Communities ◽  
Eastern United States ◽  
Bird Populations ◽  
Long Term Trends

Sex ratios affect population dynamics and individual fitness, and changing sex ratios can be indicative of shifts in sex-specific survival at different life stages. While climate- and landscape-change alter sex ratios of wild bird populations, long-term, landscape scale assessments of sex ratios are rare. Further, little work has been done to understand changes in sex ratios in avian communities. In this manuscript, we analyse long-term (1961-2015) data on five species of ducks across five broad climatic regions of the United States to estimate the effects of drought and long-term trends on the proportion of juvenile females captured at banding. As waterfowl have a 1:1 sex ratio at hatch, we interpret changes in sex ratios of captured juveniles as changes in sex-specific survival rates during early life. Seven of twelve species-region pairs exhibited evidence for long-term trends in the proportion of juvenile females at banding. The proportion of juvenile females at banding increased for duck populations in the western United States and typically declined for duck populations in the eastern United States. We only observed evidence for an effect of drought in two of the twelve species-region pairs, where the proportion of females declined during drought. As changes to North American landscapes and climate continue and intensify, we expect continued changes in sex-specific juvenile survival rates. More broadly, we encourage further research examining the mechanisms underlying long-term trends in juvenile sex ratios in avian communities.

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