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91.
Giancarlo Diana 《统计学通讯:理论与方法》2013,42(23):4302-4314
In this article, we propose a class of estimators for the population variance of a quantity of interest. The estimators in the class use auxiliary information to improve efficiency, and we suppose that measurement errors are present both in the study and auxiliary variate. We take into account such problem using a regression approach. We show that the class proposed is quite flexible and general, allowing to consider many kinds of information as auxiliary one. Comparisons within estimators in the class are studied theoretically and through simulations. 相似文献
92.
Tavis J. Glassman PhD Diana M. Reindl MA Aubrey T. Whewell MPH 《Journal of American college health : J of ACH》2013,61(8):764-768
Abstract This report examines the rationale for creating a tobacco-free campus to utilize in passing antitobacco policies, and recommendations for overcoming barriers. As with any type of advocacy effort, a variety of impediments exist, including lack of administrative and staff support, absence of student involvement, and sparse resources. A variety of potential remedies and advocacy opportunities are explored and delineated. 相似文献
93.
A fast exact algorithm for the problem of optimum cooperation and the structure of its solutions 总被引:1,自引:1,他引:0
Given a graph G=(V,E) with edge weights w
e
∈ℝ, the optimum cooperation problem consists in determining a partition of the graph that maximizes the sum of weights of
the edges with nodes in the same class plus the number of the classes of the partition. The problem is also known in the literature
as the optimum attack problem in networks. Furthermore, a relevant physics application exists. 相似文献
94.
The present study replicated and extended the Pelaez et al. (Journal of Applied Behavior Analysis 44:33–40, 2011) study, which examined the reinforcing effects of mothers’ contingent imitation of their infants’ vocalizations. Three infants aged 7–12 months who could vocalize sounds but not words participated with two caregivers for each infant (i.e., triads). During the intervention phase, the caregivers were asked to immediately imitate all vocalizations emitted by the child for a 3-min period. During the yoked control phase, the caregivers listened to an audio recording from the preceding condition and provided vocalizations non-contingently on the infants’ responses. The procedures yielded different results across participants; one infant emitted a higher frequency of vocalizations during the contingent imitation phases over the control phases, and the other two infants showed higher rates of responding during the control phases. However, all infants emitted more imitative return vocalizations during contingent reinforcement conditions compared with the yoked control condition. 相似文献
95.
Sibling Facilitation Mediates the Association Between Older and Younger Sibling Alcohol Use in Late Adolescence 下载免费PDF全文
Diana R. Samek Matt McGue Margaret Keyes William G. Iacono 《Journal of research on adolescence》2015,25(4):638-651
Previous research has shown adolescent siblings are similar in their alcohol use and that this similarity is largely due to their shared environment. Using a genetically informed sibling sample (196 full‐biological pairs, 384 genetically unrelated pairs), we confirmed that the extent to which older siblings facilitate younger siblings' alcohol use (i.e., help them get alcohol) was one factor contributing to this shared environmental association. All analyses controlled for parent and peer influences. Findings were not moderated by sibling differences in genetic relatedness, gender, or ethnicity. Proximity in sibling age strengthened these associations, somewhat. Results were especially strong for sibling pairs where the older sibling was of legal drinking age. Implications for prevention and intervention are discussed. 相似文献
96.
Becoming a (Pan)ethnic Attorney: How Asian American and Latino Law Students Manage Dual Identities 下载免费PDF全文
Yung‐Yi Diana Pan 《Sociological Forum》2015,30(1):148-169
Managing professional and personal identities often belabor upwardly mobile racialized individuals. I examine in this article how Asian American and Latino law students negotiate (pan)ethnic identities while learning to become lawyers. I contend that managing dual identities creates (pan)ethnic duty among Asian American and Latino law students. I focus on those planning to work in law firms, at least initially. While there are many career options for law students, most, irrespective of race, pursue initial careers at law firms. What leads them there? How do racialization and expectations play a role in this career aspiration? And how do students negotiate the pressure to give back, or manage the internally/externally imposed duty they feel to serve respective communities? I find that Asian American and Latino law students draw on a repertoire of strategies (marginal panethnicity, tempered altruism, and instrumental ethnicity) that encompass different accounts, identities, and roles enabling creativity and elasticity for professional and personal identities. The findings suggest that panethnicity remains salient for upwardly mobile individuals of color, even those who do not ostensibly appear to be concerned with panethnic communities and causes. 相似文献
97.
Diana L. Miglioretti Elizabeth R. Brown 《Journal of the Royal Statistical Society. Series C, Applied statistics》2008,57(1):61-74
Summary. We propose an approach for estimating the age at first lower endoscopy examination from current status data that were collected via two series of cross-sectional surveys. To model the national probability of ever having a lower endoscopy examination, we incorporate birth cohort effects into a mixed influence diffusion model. We link a state-specific model to the national level diffusion model by using a marginalized modelling approach. In future research, results from our model will be used as microsimulation model inputs to estimate the contribution of endoscopy examinations to observed changes in colorectal cancer incidence and mortality. 相似文献
98.
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100.
Research on the gendered dimensions of workplace restructuring often focuses on management strategies and their structural consequences. Less attention is paid to employees’ gendered practices. In this article, we analyse material from in‐depth interviews with front‐line public‐sector employees following a major reorganization of their jobs and workplaces. Our study makes three contributions to theory and research on gender and organizational change. Firstly, it highlights the micro‐level dynamics at the heart of restructuring by showing how workers engaged with an ideal that was central to their understanding of public‐sector work — the public‐service ethic — which they believed was threatened. Secondly, it highlights the importance of gendered meanings and identities in shaping how workers engaged with the public service ethic. Thirdly, the study shows that front‐line employees did not passively accept management plans for change but struggled to resist or transform them in gendered strategies for dealing with organizational change. 相似文献