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Archila Bustos Maria Francisca Hall Ola Niedomysl Thomas Ernstson Ulf 《Population and environment》2020,42(2):255-277
Population and Environment - Human activity is a major driver of change and has contributed to many of the challenges we face today. Detailed information about human population distribution is... 相似文献
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Oscar H. Bustos Marcelo Ruiz Silvia Ojeda Ronny Vallejos Alejandro C. Frery 《Journal of statistical planning and inference》2009
In this work we study the asymptotic behavior of a robust class of estimators of the coefficient of a AR-2D process. We establish the precise conditions for the consistency and asymptotic normality of the RA estimator. The AR-2D model has many applications in image modeling and statistical image processing, therefore the relevance of knowing such properties. The adequacy of the AR-2D model is analyzed with real images; we also show the impact of contamination and the capability of the RA estimator to produce useful results even in the presence of spurious data. 相似文献
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Patterns of Social Support in the Middle Childhood to Early Adolescent Transition: Implications for Adjustment 总被引:1,自引:0,他引:1
Mary J. Levitt Jerome Levitt Gastón L. Bustos Noel A. Crooks Jennifer D. Santos Paige Telan Jennifer Hodgetts Avidan Milevsky 《Social Development》2005,14(3):398-420
Children's social networks often include close family members, extended family members, and friends, but little is known about interindividual differences in the patterning of support from these sources. In this study, we used person‐oriented analyses to differentiate patterns of support for children undergoing the transition to adolescence. Social network and adjustment data were collected for an ethnically diverse sample of 691 fourth‐ and sixth‐grade children, with a two‐year follow‐up. Cluster analyses identified one pattern of support from both close family members and friends, a second pattern of support from both close and extended family members, and a third pattern of support primarily from close family members alone. Participants receiving support from close family in combination with either extended family or friends were better adjusted than were those without multiple support resources. The results suggest that a meaningful typology of children's social networks can be developed. 相似文献
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Catherine DeCarlo Santiago Laura M. L. Distel Anna M. Ros Stephanie K. Brewer Stephanie A. Torres Jaclyn Lennon Papadakis Anne K. Fuller Yvita Bustos 《Race and social problems》2018,10(3):235-247
The current study examined the unique effects of cumulative sociodemographic risk and immigrant-related stress on mental health symptoms among Mexican-origin immigrant parents and their school-age children. Further, this study tested whether the effects of cumulative sociodemographic risk and immigrant-related stress on child mental health were mediated by parent mental health. Participants included 104 Mexican-origin immigrant families. Families in the study had a child between the ages of 6 and 10 (Mage = 8.39; 61% female). Data were collected across three time points spaced 6 months apart. Immigrant-related stress was found to predict parent mental health, which in turn predicted child mental health. Cumulative sociodemographic risk did not predict parent or child mental health. Mental health symptoms generally decreased over time, but for children, change in mental health symptoms depended on parent mental health symptoms. Given the high levels of mental health symptoms among Mexican-origin parents and children, reducing a context of stress and promoting mental health interventions for Mexican-origin immigrants is critical. 相似文献
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Two methods of estimation for the parameters of an AR(1) process which are based on a non-linear least-squares approach are presented. On the basis of some simulation results they are compared with two maximum likelihood estimates and their relative merits are discussed. 相似文献
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Vicente Antn Andrs de Bustos Jos A. Herce Simn Sosvilla-Rivero 《Journal of Policy Modeling》1999,21(7):559
In this article we consider the energy and environmental implications of the extra GDP growth that the CSF, for the period 1994–99, is capable of entailing. In doing so, we have developed an illustration of the so-called three Es approach: economy–energy–environment. The extra growth induced by the CSF package and its incremental effects on energy consumption and CO2 emissions have been evaluated against an energy–economy baseline provided by the HERMIN-Spain model and the Spanish energy plan (PEN). The most salient aspect of the analysis performed is that the energy-saving and emission-cutting margins embodied in the so-called PEN scenario (due to energy substitution and energy efficiency) are rapidly exhausted when growth accelerates, for example, due to a CSF like shock. However, these margins also reveal the promising prospects of progrowth strategies with high energy-efficiency content. 相似文献
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