全文获取类型
收费全文 | 213篇 |
免费 | 14篇 |
专业分类
管理学 | 33篇 |
民族学 | 3篇 |
人口学 | 38篇 |
理论方法论 | 13篇 |
社会学 | 119篇 |
统计学 | 21篇 |
出版年
2023年 | 2篇 |
2022年 | 5篇 |
2021年 | 6篇 |
2020年 | 7篇 |
2019年 | 13篇 |
2018年 | 25篇 |
2017年 | 21篇 |
2016年 | 17篇 |
2015年 | 1篇 |
2014年 | 10篇 |
2013年 | 40篇 |
2012年 | 29篇 |
2011年 | 3篇 |
2010年 | 8篇 |
2009年 | 6篇 |
2008年 | 3篇 |
2007年 | 7篇 |
2006年 | 4篇 |
2005年 | 1篇 |
2004年 | 5篇 |
2003年 | 1篇 |
2002年 | 3篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1999年 | 4篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1985年 | 1篇 |
排序方式: 共有227条查询结果,搜索用时 171 毫秒
131.
132.
Nuria Molano Esperanza Len Jesús M. Jimnez‐Morago Maite Romn Cristina Murillo 《Child & Family Social Work》2021,26(1):70-78
This study aims to analyse the interaction between children in foster care and their main caregivers during a microcoded co‐construction task, focusing on the verbal and non‐verbal behaviours that the adults use to promote a secure attachment in the child. It also examines how children and caregivers' socio‐demographic variables relate to the interaction. The sample is made up of 28 Spanish children between 4 and 9 years old in long‐term non‐kin foster care and their foster families. The building task was administered to 28 dyads, composed of the child and the main caregiver in each family. Our results showed that the caregivers' use of attachment‐facilitating behaviours was frequent during the interaction. Moreover, children tended to display a positive attitude when adults used these attachment‐facilitating behaviours. We also found some differences in the interaction according to the caregivers and children's age, the child's gender and the caregivers' satisfaction with the child's development. These results offer us a better understanding of the functioning of the adult–child relationships in foster families, which helps us make more efficient interventions to improve the caregivers' sensitivity towards the children's needs and difficulties. 相似文献
133.
Aurora Fernández-Cañadas Morillo Modesto Durán Duque Ana B. Hernández López Cristina Muriel Miguel Pilar Pérez Riveiro Angel Salcedo Mariña Ana Royuela Vicente María L. Casillas Santana Miguel A. Marín Gabriel 《Women and birth : journal of the Australian College of Midwives》2019,32(1):e43-e48
Background
Some studies have suggested an association between synthetic oxytocin administration and type of birth with the initiation and consolidation of breastfeeding.Aim
This study aimed to test whether oxytocin administration and type of birth are associated with cessation of exclusive breastfeeding at different periods. A second objective was to investigate whether the administered oxytocin dose is associated with cessation of exclusive breastfeeding.Methods
We conducted a prospective cohort study (n = 529) in a tertiary hospital. Only full-term singleton pregnancies were included. Four groups were established based on the type of birth (vaginal or cesarean) and the intrapartum administration of oxytocin. Follow-up was performed to evaluate the consolidation of exclusive breastfeeding at 1, 3 and 6 months.Findings
During follow-up, the proportion of exclusive breastfeeding decreased in all groups. After adjusting for confounding variables, the group with cesarean birth without oxytocin (planned cesarean birth) had the highest risk of cessation of exclusive breastfeeding (odds ratio [95% confidence interval], 2.51 [1.53–4.12]). No association was found between the oxytocin dose administered during birth and puerperium period and the cessation of exclusive breastfeeding.Conclusion
Planned cesarean birth without oxytocin is associated with the cessation of exclusive breastfeeding at 1, 3 and 6 months of life. It would be desirable to limit elective cesarean births to essentials as well as to give maximum support to encourage breastfeeding in this group of women. The dose of oxytocin given during birth and puerperium period is not associated with cessation of exclusive breastfeeding. 相似文献134.
The article presents a case study concerning the improvement of the ‘kerbside’ waste collection system, now increasingly implemented in many Italian municipalities, as an alternative to traditional bring collection, with the aim of increasing the quality of waste collection and the collection rate, in order to reduce the final impact on the environment. A planning model for an integrated waste management system based on kerbside collection is presented. A heuristic procedure is also applied in order to obtain some admissible solutions of the real problem in reasonable computational time. The economic and environmental impacts are considered as significant elements for the evaluation and validation of the obtained solutions. Five alternative configurations of kerbside system, diverging in number of sub-area, synchrony of vehicles and directionality of the arcs, are compared in an economic point of view. Finally, Life-Cycle Assessment is used as a tool to compare the overall potential environmental impacts of the alternative of kerbside collection systems and also to compare the kerbside system with the traditional bring one. The different scenarios of kerbside system are comparable in terms of damage on the impact categories, while the bring system is the worst one, in terms of damage on human health, in the consumption of resources and also for the total damage score. 相似文献
135.
Marcos Rodrigues Fermín Alcasena Pere Gelabert Cristina Vega-García 《Risk analysis》2020,40(9):1762-1779
Despite escalating expenditures in firefighting, extreme fire events continue to pose a major threat to ecosystem services and human communities in Mediterranean areas. Developing a safe and effective fire response is paramount to efficiently restrict fire spread, reduce negative effects to natural values, prevent residential housing losses, and avoid causalties. Though current fire policies in most countries demand full suppression, few studies have attempted to identify the strategic locations where firefighting efforts would likely contain catastrophic fire events. The success in containing those fires that escape initial attack is determined by diverse structural factors such as ground accessibility, airborne support, barriers to surface fire spread, and vegetation impedance. In this study, we predicted the success in fire containment across Catalonia (northeastern Spain) using a model generated with random forest from detailed geospatial data and a set of 73 fire perimeters for the period 2008–2016. The model attained a high predictive performance (AUC = 0.88), and the results were provided at fine resolution (25 m) for the entire study area (32,108 km2). The highest success rates were found in agricultural plains along the nonburnable barriers such as major road corridors and largest rivers. Low levels of containment likelihood were predicted for dense forest lands and steep-relief mountainous areas. The results can assist in suppression resource pre-positioning and extended attack decision making, but also in strategic fuels management oriented at creating defensive locations and fragmenting the landscape in operational firefighting areas. Our modeling workflow and methods may serve as a baseline to generate locally adapted models in fire-prone areas elsewhere. 相似文献
136.
Agostinho Agra Cristina Requejo Eulália Santos 《Journal of Combinatorial Optimization》2016,31(3):1111-1129
In this paper we consider combinatorial optimization problems whose feasible sets are simultaneously restricted by a binary knapsack constraint and a cardinality constraint imposing the exact number of selected variables. In particular, such sets arise when the feasible set corresponds to the bases of a matroid with a side knapsack constraint, for instance the weighted spanning tree problem and the multiple choice knapsack problem. We introduce the family of implicit cover inequalities which generalize the well-known cover inequalities for such feasible sets and discuss the lifting of the implicit cover inequalities. A computational study for the weighted spanning tree problem is reported. 相似文献
137.
Cristina Cattaneo 《The International migration review》2016,50(4):1046-1075
The objective of this paper is to determine whether the participation in social organizations represents a complement or a substitute with respect to international emigration. To address this research question, an instrumental variable approach is used, as group participation and international migration are potentially jointly determined. This is the case if the family considers emigration and group participation as alternative strategies to cope with uncertainty or a liquidity need, or alternatively when the family decides to invest in group participation in order to gain information helpful to emigrate. The results of the empirical estimation reveal that families participating in social organizations are more likely to migrate internationally and therefore social networks act as a complement for emigration. This may indicate that families recourse to social networks in order to collect important information that facilitates international migration. 相似文献
138.
Comfort as an idea and ideal has attracted growing interest, especially in an Anglo-American context. Much of the discussion has centred either on improvements in physical comfort, not least through new technologies, or on emotional comfort and the social construction of the home. This article brings together these ideas in a comparative analysis of English and Swedish landowners. It draws on a range of correspondence to uncover more about the ways in which members of the elite themselves conceived and achieved comfort in very different geographical, economic and cultural contexts. Whilst ‘English comfort’ became widespread as an idealization of elite lifestyles by the early nineteenth century, both in Sweden and elsewhere, we argue that many of its social and physical imperatives were commonplace much earlier. This involved shared concerns with warmth and airiness, and the ways in which these were linked to health and well-being, but also with the construction of appropriate social settings. Yet, it was the emotional and non-material dimensions of comfort that dominated the correspondence in both countries: a concern with family and with home as a place defined by relationships with people rather than things. 相似文献
139.
Tiago Miguel Sá Elisabete Duarte Neves Cristina Gonçalves Góis 《Journal of Management and Governance》2017,21(4):841-878
This paper examines the influence of corporate governance characteristics on changes in total, market and idiosyncratic risk in the Portuguese capital market following the collapse of Lehman Brothers. We aim to address corporate practices, while determining if corporate governance characteristics can help predict future variations of the risk associated with a certain security and, in this sense, if these characteristics may be used to help monitor or forecast risk of an existing portfolio of securities over time. We find positive and significant changes in total and idiosyncratic risk for non-financial firms listed on Euronext Lisbon, consistent with increases in investor uncertainty during the crisis period. Our results suggest that changes in risk measures over a shorter-term and a longer-term period vary with governance characteristics. The capital market rewarded companies with a greater proportion of non-executive directors and directors that exercise (on average) management roles in more companies or institutions. On the other hand, the capital market punished companies with a greater proportion of independent directors and greater ownership concentration. 相似文献
140.
Ferran Casas Mònica González Cristina Figuer Germà Coenders 《Social indicators research》2004,66(1-2):123-141
The relation between life domains satisfactionand overall life satisfaction, values,internal/external perceived control and theoption of planning or by chance searchinginformation on the Internet has been exploredin a sample of Spanish adolescents aged 12 to16 (N=968). Age and sex differences have beenexamined. Results clearly confirm a positiverelation between satisfaction with life domainsand overall satisfaction with life.Satisfaction with life as a whole shows also tobe positively correlated with non-materialisticvalues. Perceived control shows to be, onceagain, a key construct to understand bothlife-satisfaction of adolescents and theirbehavioural intentions to plan or not to plantheir action to fulfil intended goals. A clearpattern between external and internal perceivedcontrol stems from our analysis: subjectsreporting to rely on chance when searchinginformation show higher external perceivedcontrol while respondents who prefer to planshow higher internal perceived control. Themore satisfaction expressed with learningrelated items (satisfaction with schoolperformance, learning, and preparation forfuture), with family and with life as a whole,the more tendencies are observed among therespondents to plan their search. No directrelation has been observed between values andbehavioural intentions to plan or not to planaction to fulfil intended goals. Perceivedcontrol, but also satisfaction with some lifedomains and with life as a whole seem to act asmediating factors between behaviouralintentions and values. 相似文献