8,587 research outputs found
Life expectancy among LDS and Non-LDS in Utah
This paper compares life expectancy between members of the Church of Jesus Christ of Latter-day Saints (LDS or Mormons) and non-LDS in Utah. It examines the extent to which tobacco-related deaths explain variation in life expectancy between LDS and non-LDS. Complete life table estimates were derived using conventional methods and cross-sectional data for white males and females from 1994-1998. Life expectancy was 77.3 for LDS males, 70.0 for non-LDS males, 82.2 for LDS females, and 76.4 for non-LDS females. For those alive at age 80, the remaining years of life expected were 8.2 for LDS males, 6.5 for non-LDS males, 10.3 for LDS females, and 7.1 for non-LDS females. Years of life expected increased more so among non-LDS after we removed deaths associated with tobacco use from the life table. A comparison between LDS and non-LDS of the adjusted life expectancy estimates indicates that although differential tobacco use explains some of the higher life expectancy in LDS, it only accounts for about 1.5 years of the 7.3 year difference for males and 1.2 years of the 5.8 year difference for females. Higher life expectancy experienced among LDS not explained by tobacco-related deaths may be due to factors associated with religious activity in general, such as better physical health, better social support, and healthier lifestyle behaviors. Religious activity may also have an independent protective effect against mortality.life style, life tables, Mormons, religion, risk factors, Utah
Wildlife disease elimination and 1 density dependence
Disease control by managers is a crucial response to emerging wildlife epidemics, yet the means of control may be limited by the method of disease transmission. In particular, it is widely held that population reduction, while effective for controlling diseases that are subject to density-dependent transmission, is ineffective for controlling diseases that are subject to frequency-dependent transmission. We investigate control for horizontally transmitted diseases with frequency-dependent transmission where the control is via nonselective (for infected animals) culling or harvesting and the population can compensate through density-dependent recruitment or survival. Using a mathematical model, we show that culling or harvesting can eradicate the disease, even when transmission dynamics are frequency-dependent. E 24 radication can be achieved under frequency-dependent transmission when density-dependent population regulation induces compensatory growth of new, healthy individuals, which has the net effect of reducing disease prevalence by dilution. We also show that if harvest is used simultaneously with vaccination and there is high enough transmission coefficient, application of both controls may be less efficient than when vaccination alone is used. We illustrate the effects of these control approaches on disease prevalence using assumed parameters for chronic wasting disease in deer where the disease is transmitted directly among deer and through the environment
Diffusion-based method for producing density equalizing maps
Map makers have long searched for a way to construct cartograms -- maps in
which the sizes of geographic regions such as countries or provinces appear in
proportion to their population or some other analogous property. Such maps are
invaluable for the representation of census results, election returns, disease
incidence, and many other kinds of human data. Unfortunately, in order to scale
regions and still have them fit together, one is normally forced to distort the
regions' shapes, potentially resulting in maps that are difficult to read. Many
methods for making cartograms have been proposed, some of them extremely
complex, but all suffer either from this lack of readability or from other
pathologies, like overlapping regions or strong dependence on the choice of
coordinate axes. Here we present a new technique based on ideas borrowed from
elementary physics that suffers none of these drawbacks. Our method is
conceptually simple and produces useful, elegant, and easily readable maps. We
illustrate the method with applications to the results of the 2000 US
presidential election, lung cancer cases in the State of New York, and the
geographical distribution of stories appearing in the news.Comment: 12 pages, 3 figure
PEM-West trajectory climatology and photochemical model sensitivity study prepared using retrospective meteorological data
Trajectory and photochemical model calculations based on retrospective meteorological data for the operations areas of the NASA Pacific Exploratory Mission (PEM)-West mission are summarized. The trajectory climatology discussed here is intended to provide guidance for flight planning and initial data interpretation during the field phase of the expedition by indicating the most probable path air parcels are likely to take to reach various points in the area. The photochemical model calculations which are discussed indicate the sensitivity of the chemical environment to various initial chemical concentrations and to conditions along the trajectory. In the post-expedition analysis these calculations will be used to provide a climatological context for the meteorological conditions which are encountered in the field
Pleistocene History of a Part of the Hocking River Valley, Ohio
Author Institution: Department of Geology, University of Illinois, Urban
Advanced detection, isolation and accommodation of sensor failures: Real-time evaluation
The objective of the Advanced Detection, Isolation, and Accommodation (ADIA) Program is to improve the overall demonstrated reliability of digital electronic control systems for turbine engines by using analytical redundacy to detect sensor failures. The results of a real time hybrid computer evaluation of the ADIA algorithm are presented. Minimum detectable levels of sensor failures for an F100 engine control system are determined. Also included are details about the microprocessor implementation of the algorithm as well as a description of the algorithm itself
Alien Registration- Merrill, Henrietta M. (Hebron, Oxford County)
https://digitalmaine.com/alien_docs/21139/thumbnail.jp
The 8-13 micron observations of Titan
Narrow band observations of Titan at selected wavelengths in the 8-13 micron range show evidence for a strong temperature inversion and the existence of at least one more spectroscopically active component in the atmosphere in addition to H2 and CH4
How linear features alter predator movement and the functional\ud response
In areas of oil and gas exploration, seismic lines have been reported to alter the movement patterns of wolves (Canis lupus). We developed a mechanistic first passage time model, based on an anisotropic elliptic partial differential equation, and used this to explore how wolf movement responses to seismic lines influence the encounter rate of the wolves with their prey. The model was parametrized using 5 min GPS location data. These data showed that wolves travelled faster on seismic lines and had a higher probability of staying on a seismic line once they were on it. We simulated wolf movement on a range of seismic line densities and drew implications for the rate of predator–prey interactions as described by the functional response. The functional response exhibited a more than linear increase with respect to prey density (type III) as well as interactions with seismic line density. Encounter rates were significantly higher in landscapes with high seismic line density and were most pronounced at low prey densities. This suggests that prey at low population densities are at higher risk in environments with a high seismic line density unless they learn to avoid them
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