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421.
Population and land use change in the California Mojave: Natural habitat implications of alternative futures 总被引:6,自引:0,他引:6
Hunter Lori M. Gonzalez G Manuel De J. Stevenson Matt Karish Kimberly S. Toth Richard Edwards Thomas C. Lilieholm Robert J. Cablk Mary 《Population research and policy review》2003,22(4):373-397
Demographic and land use dynamics have important implications for the natural environment within both developed and developing nations. Within the context of developed nations, popular and policy debates surrounding contemporary patterns of suburbanization attest to the salience of demographic and development issues. We examine the implications of land-use patterns as related to population and development within the context of the California Mojave Desert ecosystem. In a general sense, we aim to better understand the land requirements inferred by varying levels of population growth and density, as well as the natural habitat implications of those requirements. We develop a GIS including remotely sensed imagery, and demographic, economic, and biophysical data to examine of the implications of various demographic scenarios on species diversity. Spatial and statistical models are designed to develop possible alternative land use `futures'. Within the context of the California Mojave region, our results suggest that high-density development could reduce conflict with regions providing potential habitat for threatened or endangered species by over 80 percent. The process of model development demonstrates a potentially useful tool for policymakers, allowing for estimation and visualization of the land use implications of policy decisions. 相似文献
422.
A Gaussian random function is a functional version of the normal distribution. This paper proposes a statistical hypothesis test to test whether or not a random function is a Gaussian random function. A parameter that is equal to 0 under Gaussian random function is considered, and its unbiased estimator is given. The asymptotic distribution of the estimator is studied, which is used for constructing a test statistic and discussing its asymptotic power. The performance of the proposed test is investigated through several numerical simulations. An illustrative example is also presented. 相似文献
423.
Across a range of countries, analysts have found that adaptations to the COVID-19 pandemic often exacerbated previously existing labor inequalities between men and women in formal employment markets and households. This has been especially true for mothers with children in their households. Drawing on decades of sociological and feminist scholarship on labor, we suggest the following three strategies to strengthen ongoing research concerning pandemic-induced reorganizations of gendered labor. First, ongoing research should expand considerations of gendered labor to account for more types of work and workers. Second, initial findings should be extended through the continued utilization of diverse methodologies to better account for the ambivalent experiences and meanings associated with emergent reorganizations of gendered work during the pandemic. Finally, ongoing research should pursue intersectional analyses of gendered labor that are sensitive to the complex dynamics of place and time. By expanding and strengthening considerations of gendered labor in these manners, ongoing analyses could generate more comprehensive, precise findings that better guide policy interventions meant to address the gendered inequities being sharpened by the pandemic. Foundational theoretical understandings of gendered labor and its associated inequalities could also be extended. 相似文献
424.
Journal of Population Research - Indigenous Peoples in the United States have been experiencing disproportionate impacts of COVID-19. American Indian and Alaska Native persons are more likely to be... 相似文献
425.
Since 2013, wild poliovirus (WPV) transmission occurred only for type 1 (WPV1). Following several years of increasing reported incidence (2017–2019) and programmatic disruptions caused by COVID-19 (early 2020), Pakistan and Afghanistan performed a large number of supplementary immunization activities (late 2020–2021). This increased intensity of immunization, following widespread transmission, substantially decreased WPV1 cases and positive environmental samples during 2021. Modeling the potential for undetected circulation of WPV1 after apparent interruption can support regional and global decisions about certification of the eradication of indigenous WPV1 transmission. We apply a stochastic model to estimate the confidence about no circulation (CNC) of WPV1 in Pakistan and Afghanistan as a function of time since the last reported case and/or positive environmental sample. Exploration of different assumptions about surveillance quality suggests a range for CNC for WPV1 as a function of time since the last positive surveillance signal, and supports the potential use of a time with no evidence of transmission of less than 3 years as sufficient to assume die out in the context of good acute flaccid paralysis (AFP) surveillance. We show high expected CNC based on AFP surveillance data alone, even with imperfect surveillance and some use of inactivated poliovirus vaccine masking the ability of AFP surveillance to detect transmission. Ensuring high quality AFP and environmental surveillance may substantially shorten the time required to reach high CNC. The time required for high CNC depends on whether immunization activities maintain high population immunity and the quality of surveillance data. 相似文献
426.
Kimberly R. Osborne Mia A. Smith-Bynum Ashley A. Walsdorf Leslie A. Anderson Margaret O'Brien Caughy 《Journal of research on adolescence》2023,33(2):547-563
We hypothesized that the goodness-of-fit between profiles of observed, caregiver-provided ethnic–racial socialization (ERS), and child self-regulation (i.e., inhibitory control) would differentially associate with child behavioral outcomes. Conversations between 80 caregivers (45% Latinx; 55% Black) and their children (M age = 11.09; 46% female) were rated for ERS. Measures included an inhibitory control composite (ages 2.5–3.5) and the Child Behavior Checklist (CBCL; age 12). Three profiles were determined: Comprehensive (n = 34), Reactive (n = 8), and Pragmatic (n = 38). Only youth with low inhibitory control in preschool appeared to benefit from Pragmatic ERS, whereas youth with normative or high inhibitory control in early childhood displayed lower internalizing and externalizing behaviors when they had Comprehensive or Reactive rather than Pragmatic caregivers. 相似文献