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901.
This paper considers estimation and prediction in the Aalen additive hazards model in the case where the covariate vector
is high-dimensional such as gene expression measurements. Some form of dimension reduction of the covariate space is needed
to obtain useful statistical analyses. We study the partial least squares regression method. It turns out that it is naturally
adapted to this setting via the so-called Krylov sequence. The resulting PLS estimator is shown to be consistent provided
that the number of terms included is taken to be equal to the number of relevant components in the regression model. A standard
PLS algorithm can also be constructed, but it turns out that the resulting predictor can only be related to the original covariates
via time-dependent coefficients. The methods are applied to a breast cancer data set with gene expression recordings and to
the well known primary biliary cirrhosis clinical data. 相似文献
902.
We proposed a modification to the variant of link-tracing sampling suggested by Félix-Medina and Thompson [M.H. Félix-Medina, S.K. Thompson, Combining cluster sampling and link-tracing sampling to estimate the size of hidden populations, Journal of Official Statistics 20 (2004) 19–38] that allows the researcher to have certain control of the final sample size, precision of the estimates or other characteristics of the sample that the researcher is interested in controlling. We achieve this goal by selecting an initial sequential sample of sites instead of an initial simple random sample of sites as those authors suggested. We estimate the population size by means of the maximum likelihood estimators suggested by the above-mentioned authors or by the Bayesian estimators proposed by Félix-Medina and Monjardin [M.H. Félix-Medina, P.E. Monjardin, Combining link-tracing sampling and cluster sampling to estimate the size of hidden populations: A Bayesian-assisted approach, Survey Methodology 32 (2006) 187–195]. Variances are estimated by means of jackknife and bootstrap estimators as well as by the delta estimators proposed in the two above-mentioned papers. Interval estimates of the population size are obtained by means of Wald and bootstrap confidence intervals. The results of an exploratory simulation study indicate good performance of the proposed sampling strategy. 相似文献
903.
904.
P. L. Rika Fatimah A. A. Jemain K. Ibrahim S. Mohammad Nasir M. A. Khairul Anuar 《Social indicators research》2009,92(1):131-149
Determining priority importance is a matter of concerns among the organization to improve their performance. One of the important
aspects that should be considered by the organization is management of human resources, comprising of members who have their
own family life. In this paper, we deliver a new perspective for organization to provide priority importance for their members
with respect to family matters in order to inculcate the sense of belonging in the organization. To be effective in considering
family matters in the organizational policy making, closer look of family characteristics are required. The idea of translating
several family characteristics as quality variables and applying the quality function deployment (QFD) method to these variables
could present a new way of improving the decision making in the organization by considering the process of decision in the
family. Quality function deployment for family (QFDF) produces a friendly interpretation of a highly complex and intangible
matters around family life; thus, making the assessment of a family easier. QFD is applied on the data gathered from a questionnaire
survey based on 1,213 families in West Malaysia, Malaysia. Twelve variables are identified as voice of family, where seven
of them are found to have the highest priority of importance. These variables could also be translated into quality variables
in the context of organization, the strategy of improvement for the family could be interpreted as strategy for improvement
in the organization. Furthermore, the results of this study provide suggestion to improve actions for managing human resource.
In the discussion, three most high ranked variables from both perspectives of family and organization are considered. 相似文献
905.
This article defines Active Citizenship within a European context as a broad range of value based participation. It develops
a framework for measuring this phenomenon which combines the four dimensions of Protest and Social Change, Community Life,
Representative Democracy and Democratic values. The European Social Survey 2002 is used to populate the framework as this
survey provided the best data coverage available and covered 19 European Countries. In total 61 indicators were selected.
A composite indicator (CI), The Active Citizenship Composite Indicator (ACCI), is built using the framework provided and using
experts’ weights. In addition, the robustness of the results is tested using sensitivity analysis. The limitations to the
ACCI are explained in terms of the limitation of the data availability in particular concerning the new forms of participation
and less organised forms of participation. Nevertheless, ACCI proved to be statistically robust and reliable and proved to
be a useful tool for monitoring levels of citizenship in Europe. The results of ACCI exhibit interesting and quite distinct
regional patterns. The results showed that the Nordic countries, and in particular Sweden, have the highest rate of Active
Citizenship, followed by Central Europe and Anglo-Saxon countries. Mediterranean countries are next followed by Eastern European
countries that close the ranking.
相似文献
Massimiliano MascheriniEmail: |
906.
本文结合田野调查资料,根据热贡文化生态特点,从文化生态学、艺术人类学角度,探讨了热贡艺术的文化生态,及生态系统中的文化特质,并时热贡艺术产业化发展进行了思考. 相似文献
907.
Robert D. Crutchfield Martie L. Skinner Kevin P. Haggerty Anne McGlynn Richard F. Catalano 《Race and social problems》2009,1(4):218-230
Criminologists have long reported the existence of racial disparity in the criminal justice system, but the important question
is why. While some argue that observed differences are a consequence of more criminal behavior among minorities, the weight
of the evidence indicates that this is but a partial explanation. In this paper, we study data from a sample of juveniles
to examine how racial differences in early police contact, and important social environments—family, school, and neighborhoods—affect
later contact and arrests, controlling for self-reported delinquency. We find that early (in middle school) contact with police
is an important predictor of later (high school) arrests. Also we found that, in addition to being male and living in a low-income
family, children who have parents who have a history of arrest, who have experienced school disciplinary actions, who have
delinquent peers, and who are in networks with deviant adults are more likely to have problems with law enforcement. These
factors help to explain racial differences in police contacts and arrests. 相似文献
908.
The effects of under‐skilling on need for recovery,losing employment and retirement intentions among older office workers: A prospective cohort study
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Fleur G. GOMMANS Nicole W.H. JANSEN Dave STYNEN IJmert KANT Andries de GRIP 《International labour review / International Labour Office》2017,156(3-4):525-548
Based on a sample of older workers from the Maastricht Cohort Study, the authors investigate the prevalence and dynamics of self‐reported under‐skilling and its effects on workers' need for recovery, their risk of losing employment and their retirement intentions over a two‐year period. They find that being under‐skilled is associated both with higher levels of need for recovery over time and with the risk of losing employment, but not with early retirement intentions. To achieve sustainable employment, they argue, the course of under‐skilling should be monitored throughout workers' careers, enabling timely interventions to avoid its negative consequences. 相似文献
909.
Children of immigrant background, despite problems with acculturation, poverty, and discrimination, have better mental health than children of native parents. We asked whether this is a result of immigrant families' characteristics such as family structure and relations. Using a new comparative study on the integration of immigrant‐background youth conducted in England, Germany, the Netherlands, and Sweden (N = 18,716), particularly strong associations with mental health (internalizing and externalizing problems) were found for family structure, family cohesion, and parental warmth. Overall, half of the advantage in internalizing and externalizing problems among immigrant‐background youth could be accounted for by our measures of family structure and family relations, with family cohesion being particularly important. 相似文献
910.
Does Viewing Pornography Diminish Religiosity Over Time? Evidence From Two-Wave Panel Data 总被引:1,自引:1,他引:0
Samuel L. Perry 《Journal of sex research》2017,54(2):214-226
Research consistently shows a negative association between religiosity and viewing pornography. While scholars typically assume that greater religiosity leads to less frequent pornography use, none have empirically examined whether the reverse could be true: that greater pornography use may lead to lower levels of religiosity over time. I tested for this possibility using two waves of the nationally representative Portraits of American Life Study (PALS). Persons who viewed pornography at all at Wave 1 reported more religious doubt, lower religious salience, and lower prayer frequency at Wave 2 compared to those who never viewed porn. Considering the effect of porn-viewing frequency, viewing porn more often at Wave 1 corresponded to increases in religious doubt and declining religious salience at Wave 2. However, the effect of earlier pornography use on later religious service attendance and prayer was curvilinear: Religious service attendance and prayer decline to a point and then increase at higher levels of pornography viewing. Testing for interactions revealed that all effects appear to hold regardless of gender. Findings suggest that viewing pornography may lead to declines in some dimensions of religiosity but at more extreme levels may actually stimulate, or at least be conducive to, greater religiosity along other dimensions. 相似文献