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81.
Kathryn C. Monahan Isaac C. Rhew J. David Hawkins Eric C. Brown 《Journal of research on adolescence》2014,24(4):630-645
Delinquency and substance use are more likely to co‐occur in adolescence compared to earlier and later developmental periods. The present study examined developmental pathways to co‐occurring problem behavior from 6th to 10th grade (N = 2,002), testing how peer delinquency and substance use were linked to transitioning between abstaining, delinquency, substance use, and co‐occurring problem behavior. Developmentally, most youth transition from abstinence to delinquent behavior and then escalate to co‐occurring problem behavior. Once co‐occurring problem behavior onsets, remitting to single‐problem behavior or abstinence is unlikely. The impact of peers on problem behavior is domain‐specific when individuals transition from abstaining to a single‐problem behavior, but is more general with respect to escalation of and desistance from problem behavior. 相似文献
82.
83.
A full understanding of disability recognizes that it has a powerful human rights dimension and is often associated with social exclusion, and increased exposure and vulnerability to poverty. Disability is a human rights issue. The World Bank (1999) report points out that one in five of the world’s poorest are disabled, for whom access to basic rights is a daily struggle. Though arising from physical or intellectual impairment, disability has social implications as well as health ones. In most countries, government services for disabled people are still small‐scale rehabilitation projects separated from the rest of the community. People with disabilities are amongst the poorest of the poor. Barriers built by disability and poverty can only be removed by the concerted and integrated effort of the government, NGOs, corporates, movie mughals and educational institutions. It is the duty of the rest of society to acknowledge the rights of the poor and the disabled. This can no longer be treated as philanthropy but is a responsibility. 相似文献
84.
Anna Clara F. Vieira Cláudia M.C. Alves Vandilson P. Rodrigues Cecília C.C. Ribeiro Isaac S. Gomes-Filho Fernanda F. Lopes 《Women and birth : journal of the Australian College of Midwives》2019,32(1):e12-e16
Background
The rates of preterm births have been increasing worldwide. Complications related to preterm births are associated with increased costs of care, and have a direct impact on the health system of the countries. Therefore, it is important to address factors associated with preterm birth in order to provide prevention strategies.Objective
This case–control study investigated oral, systemic, and socioeconomic factors associated with preterm birth in postpartum women. Participants were 279 postpartum women that gave birth to a singleton live-born infant. Cases were women giving birth before 37 completed weeks of gestation (preterm birth). Controls were women giving birth at term (≥37 weeks). Data were collected through questionnaires, medical records and intra-oral clinical examinations, which included dental caries registration according to World Health Organization criteria and oral biofilm evaluation through visible plaque index.Results
Ninety-one women had preterm birth (cases) and 188 women had birth at term (controls), ratio 1:2. Caries lesions were present in 62.3% of the cases and in 62.5% of the controls. The univariate analysis showed no association between dental caries and preterm birth (Odds Ratio = 1.08, p = 0.90). The multivariate analysis showed that maternal educational level (Odds Ratio = 2.56, p = 0.01) and arterial hypertension (Odds Ratio = 2.32, p = 0.01) were associated with prematurity.Conclusion
This study demonstrated that dental caries is frequent in postpartum women, but it does not appear to be associated with preterm birth. Meanwhile, maternal education level and arterial hypertension were associated with prematurity in this population. 相似文献85.
86.
The vicious circle argument, rooted in a neo-Malthusian tradition, states that resource scarcity increases the demand for child labor and leads to higher fertility. The rural livelihood framework, on the other hand, contends that households employ multiple strategies, only one of which involves adjusting their fertility levels as a response to environmental pressures. This study provides a unique test of both theories by examining the relationship between land cover change and fertility across hundreds of rural communities in four West-Central African countries. The findings reveal a complex relationship between natural capital and fertility. In communities where natural capital was initially low, a further decline in that capital is associated with both higher fertility preferences and levels. However, we find that fertility preferences and behavior are often discordant, with notable within-community differences in response to decline in natural capital across levels of household wealth. 相似文献
87.
J. Isaac Miller 《Econometric Reviews》2016,35(6):1142-1171
I analyze efficient estimation of a cointegrating vector when the regressand and regressor are observed at different frequencies. Previous authors have examined the effects of specific temporal aggregation or sampling schemes, finding conventionally efficient techniques to be efficient only when both the regressand and the regressors are average sampled. Using an alternative method for analyzing aggregation under more general weighting schemes, I derive an efficiency bound that is conditional on the type of aggregation used on the low-frequency series and differs from the unconditional bound defined by the full-information high-frequency data-generating process, which is infeasible due to aggregation of at least one series. I modify a conventional estimator, canonical cointegrating regression (CCR), to accommodate cases in which the aggregation weights are known. The correlation structure may be utilized to offset the potential information loss from aggregation, resulting in a conditionally efficient estimator. In the case of unknown weights, the correlation structure of the error term generally confounds identification of conditionally efficient weights. Efficiency is illustrated using a simulation study and an application to estimating a gasoline demand equation. 相似文献
88.
89.
Carina Van Vliet Catharina P. B. Van der Ploeg Nancy Kidula Isaac M. Malonza Mark Tyndall Nico J. D. Nagelkerke 《Journal of sex research》2013,50(3):298-305
In mathematical models for predicting the spread of sexually transmitted diseases (STDs), the rate of acquisition of new sex partners and concurrency, the number of simultaneous sexual partnerships, are important parameters. Yet, information on these parameters is rarely obtained in routine sexual behavior surveys; instead, questions about the total number of sex partners during specific periods are often asked. We present two methods that estimate the rate of partnership acquisition and concurrency from reported numbers of sex partners in two overlapping periods. The first method assumes homogeneous behavior, while the second method also takes account of heterogeneity in sexual behavior. Both methods assume random (Poisson) partnership acquisition and the possibility of overlap in relationships. For both methods it might be relevant to distinguish individuals who are in a stable relationship from those who are not. 相似文献
90.
Using 2008 Afrobarometer survey data, we examine the relationship between religion and subjective well-being (SWB) in Ghana,
as well as religious group differences in their experiences of SWB. Two measures of religion—religious affiliation and religious
importance, and two measures of SWB—absolute SWB (own perceived living conditions) and relative SWB (own living conditions
compared to those of other Ghanaians) are employed in this study. Results show that religious affiliation is significantly
related to both measures of SWB although associations depicted for such relationships were not strong. Religious importance
significantly related to relative SWB only (with a weak-to-moderate association). Significant religious affiliation and religious
importance group differences are found on both SWB outcomes via non-parametric test procedures (Kruskal–Wallis H test, followed
by post hoc tests). On balance, the None/Traditional religious group experienced less favorable SWB than Other Christian,
Evangelical/Pentecostal, and Muslim groups, especially for absolute SWB, while the None/Traditional group experienced particularly
less favorable relative SWB than the Protestant group. Religious importance groups also significantly differed in such a way
that the group that considered religion very important had more favorable experiences of both types of SWB than the group
that considered religion not at all/not very important. Other significant differences on both outcomes are found among ethnic,
educational, and regional groups. In view of the findings, the study contributes to SWB research and suggests policy implications. 相似文献