全文获取类型
收费全文 | 850篇 |
免费 | 25篇 |
专业分类
管理学 | 91篇 |
民族学 | 10篇 |
人口学 | 86篇 |
丛书文集 | 3篇 |
理论方法论 | 56篇 |
综合类 | 7篇 |
社会学 | 454篇 |
统计学 | 168篇 |
出版年
2024年 | 2篇 |
2023年 | 16篇 |
2022年 | 5篇 |
2021年 | 8篇 |
2020年 | 35篇 |
2019年 | 26篇 |
2018年 | 54篇 |
2017年 | 73篇 |
2016年 | 45篇 |
2015年 | 27篇 |
2014年 | 41篇 |
2013年 | 173篇 |
2012年 | 93篇 |
2011年 | 33篇 |
2010年 | 29篇 |
2009年 | 28篇 |
2008年 | 25篇 |
2007年 | 13篇 |
2006年 | 27篇 |
2005年 | 12篇 |
2004年 | 13篇 |
2003年 | 18篇 |
2002年 | 12篇 |
2001年 | 7篇 |
2000年 | 7篇 |
1999年 | 4篇 |
1998年 | 4篇 |
1997年 | 6篇 |
1996年 | 4篇 |
1995年 | 2篇 |
1994年 | 4篇 |
1993年 | 3篇 |
1992年 | 2篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1987年 | 1篇 |
1985年 | 2篇 |
1983年 | 2篇 |
1982年 | 1篇 |
1981年 | 2篇 |
1980年 | 1篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 1篇 |
1975年 | 2篇 |
1974年 | 2篇 |
1973年 | 1篇 |
1968年 | 1篇 |
排序方式: 共有875条查询结果,搜索用时 0 毫秒
741.
Alterations made in the architectural design can be considered as a continuous process, from its conception to the moment a built environment is already in use. This article focuses on the "moving phase", which is the initial moment of the environment occupation and the start-up of services. It aims to show that the continuity of ergonomics interventions during the "moving phase" or start up may reveal the built environment inadequacies; clearly showing needs not met by the design and allowing making instant decisions to solve non-foreseen problems. The results have revealed some lessons experienced by users during a critical stage not usually included in the design process. 相似文献
742.
Relation between green spaces and bird community structure in an urban area in Southeast Brazil 总被引:1,自引:0,他引:1
Maria Cecília Barbosa de Toledo Reginaldo José Donatelli Getulio Teixeira Batista 《Urban Ecosystems》2012,15(1):111-131
Increased urbanization typically leads to an increase in abundance of a few species and a reduction in bird species richness.
Understanding the structure of biotic communities in urban areas will allow us to propose management techniques and to decrease
conflicts between wild species and human beings. The objective of this study was to describe the structure of the bird community
in an urban ecosystem. The study was carried out in the city of Taubaté in southeastern Brazil. Point-counts were established
in areas with different levels of tree density ranging from urban green spaces to predominantly built-up areas. We looked
for a correlation between the richness/abundance of birds and the size of the area surveyed, the number of houses, the number
of tree species and the number of individual trees. The results of multiple regression showed that bird richness had a direct
relationship with vegetation complexity. The abundance and diversity of tree species were better predictors of bird species
than the number of houses and size of the area surveyed. We discuss implications of this study for conservation and management
of bird diversity in urban areas, such as the need to increase green areas containing a large diversity of native plant species. 相似文献
743.
Wallerstein LF Tricoli V Barroso R Rodacki A LF Russo L Aihara AY da Rocha Correa Fernandes A de Mello MT Ugrinowitsch C 《Journal of aging and physical activity》2012,20(2):171-185
The purpose of this study was to compare the neuromuscular adaptations produced by strength-training (ST) and power-training (PT) regimens in older individuals. Participants were balanced by quadriceps cross-sectional area (CSA) and leg-press 1-repetition maximum and randomly assigned to an ST group (n = 14; 63.6 ± 4.0 yr, 79.7 ± 17.2 kg, and 163.9 ± 9.8 cm), a PT group (n = 16; 64.9 ± 3.9 yr, 63.9 ± 11.9 kg, and 157.4 ± 7.7 cm), or a control group (n = 13; 63.0 ± 4.0 yr, 67.2 ± 10.8 kg, and 159.8 ± 6.8 cm). ST and PT were equally effective in increasing (a) maximum dynamic and isometric strength (p < .05), (b) increasing quadriceps muscle CSA (p < .05), and (c) decreasing electrical mechanical delay of the vastus lateralis muscle (p < .05). There were no significant changes in neuromuscular activation after training. The novel finding of the current study is that PT seems to be an attractive alternative to regular ST to maintain and improve muscle mass. 相似文献
744.
745.
Luis Miguel Gutiérrez-Robledo José Alberto Ávila-Funes Hélène Amieva Céline Meillon José Luis Acosta Ana Patricia Navarrete-Reyes 《The aging male》2016,19(1):58-63
Objective: Since vitamin D is an important regulator of muscle function, the effect of vitamin D deficiency on frailty syndrome has been recently studied. This cross-sectional study aimed to determine the association between 25(OH)-vitamin D levels and frailty status in Mexican community-dwelling elderly.Methods: Sample of 331 community-dwelling elderly aged 70 or older, a subset of those included in the “Coyoacán cohort” were included. 25(OH)-vitamin D assay and frailty status were measured.Results: Mean age was 79.3 years and 54.1% were women. Those classified as frail were more likely to have lower Mini-Mental State Examination score (p?=?0.015), more disability for instrumental activities of daily living (p?0.001) and for activities of daily living (p?0.001). Serum 25(OH)-vitamin D levels were lower in the frail subgroup when compared with the non-frail one (p?0.001). Multivariate logistic regression analyses showed a significant association between intermediate tertile [odds ratios (OR)?=?4.13; 95% confidence intervals (CI) 2.00–8.56] or insufficient tertile (OR?=?8.95; 95% CI 2.41–33.30) of vitamin D levels and frailty even after adjusting for potential confounders.Conclusion: These results suggest that older adults with low 25(OH)-vitamin D levels are associated with the probability to being frail compared with those with sufficient vitamin D levels. 相似文献
746.
Rebecca Giguere Curtis Dolezal José A. Bauermeister Timothy Frasca Juan Valladares Irma Febo 《Journal of sex research》2016,53(6):633-641
This study examined how acceptability of placebo gel with receptive anal intercourse (RAI) and likelihood of future rectal microbicide use varied across partner types. Because no rectal microbicide is available yet, use of placebo permitted the study of gel use behavior in real-life circumstances. A total of 87 men who have sex with men (MSM) aged 18 to 30 years inserted placebo gel rectally before RAI during 12 weeks. Using mixed-methods design, participants completed a behavioral questionnaire and in-depth interview. In all, 62 men (71.3%) reported gel use with a lover (i.e., spouse equivalent, boyfriend), 32 (36.8%) with a one-night stand (i.e., man with whom you had sex once), and 29 (33.3%) with an “other” male partner. While gel acceptability was high across partner types, use with lovers was facilitated by trust and familiarity; yet trust made participants believe protection was less necessary. Conversely, participants expressed high likelihood of using gel with one-night stands, whom they perceived as riskier; yet they felt less comfortable discussing gel with them, often resorting to covert use or forgoing gel. A successful microbicide will be positioned as a sexual pleasure enhancer so that men can present it to their lovers and other partners as a gel that improves sex and secondarily prevents human immunodeficiency virus (HIV). 相似文献
747.
Lifen Cheng Juan José Igartua Elena Palacios Tania Acosta Socorro Palito 《International migration (Geneva, Switzerland)》2014,52(6):197-215
In this paper, an exploratory content analysis has been developed for a case study on the topic of immigration reported in the regional newspapers of the largest Spanish autonomous community, Castilla and Leon. This study based its research conceptualization on the framing theory in mass communication. In addition to usual issue frames and issue images, two framing devices were established for analytic variables ‐‐ the index of importance and the index of affective attribute. They formed a frame package capable of making latent frames evident by their linkage to manifest frames. Comparing to the general assumption of relevant‐bad‐news production, results obtained in this study proved that, on occasion, negative news stories could be reported as less relevant than the positive ones. The outcomes also show how concept mapping of frames was applicable to immigration issues and immigrants’ visual aspects of immigrant communities that were systematically articulated and disseminated by the press in this regional society of Spain. 相似文献
748.
Roser Granero Eva Penelo Randy Stinchfield Fernando Fernandez-Aranda Lamprini G. Savvidou Frida Fröberg Neus Aymamí Mónica Gómez-Peña Miriam Pérez-Serrano Amparo del Pino-Gutiérrez José M. Menchón Susana Jiménez-Murcia 《Journal of gambling studies / co-sponsored by the National Council on Problem Gambling and Institute for the Study of Gambling and Commercial Gaming》2014,30(2):475-492
The age of a patient is a strong moderator of both the course and the evolution of disorders/diseases. However, the effects of current age in pathological gambling (PG) have rarely been examined. The aim of this study is to explore the moderating effects of the patients’ current age in relation to personality traits and clinical outcomes of PG. A total sample of 2,309 treatment-seeking patients for PG, diagnosed according to DSM-IV criteria, participated in this study and were assessed with the Diagnostic Questionnaire for Pathological Gambling according to DSM-IV criteria, the South Oaks Gambling Screen, the Symptom Checklist, the Temperament and Character Inventory-R, and other clinical and psychopathological measures. Orthogonal polynomial contrasts showed linear trends in the relationship between age and PG: the older the patient, the more comorbid health problems were visible. The presence of additional quadratic trends also suggests that age plays a significant role in moderating the possibility of existing PG problems and general psychopathology. No interaction term was found between age and sex, but it was present for age and some personality traits: self-transcendence and reward dependence (these two traits were only relevant to the level of impairment due to PG at specific ages). This study suggests that the patients’ age influences psychopathological and clinical aspects associated to PG. Intervention in the earliest manifestations of this complex problem is essential in order to better address the need of successful treatment planning. 相似文献
749.
José Ignacio Carrasco Ognjen Obućina 《International migration (Geneva, Switzerland)》2023,61(1):239-255
This article explores the conditions under which Senegalese immigrants in Spain send remittances home, beginning with the premise that remittances are intertwined with migration histories and migrants’ incorporation into host societies. Given the strong gender norms in Senegal, we perform separate analyses for men and women. We use a longitudinal approach to analyse how remittance behaviour is affected by immigrants’ characteristics, their economic integration, and their ties to origin and destination. Our data come from the MAFE and MESE surveys, which were implemented in 2008 and 2011, respectively. The results indicate that remitters constitute a clear majority among Senegalese immigrants in Spain. The Kaplan–Meier analysis shows that they rarely stop remitting once they start doing so, and the multivariate analysis reveals a strong positive association between employment and remittance sending. Although most coefficients in the full model are similar for men and women, some important differences emerge as well. 相似文献
750.