首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1026篇
  免费   49篇
管理学   91篇
民族学   9篇
人口学   114篇
丛书文集   5篇
理论方法论   176篇
综合类   25篇
社会学   571篇
统计学   84篇
  2023年   11篇
  2022年   3篇
  2021年   9篇
  2020年   31篇
  2019年   42篇
  2018年   56篇
  2017年   75篇
  2016年   58篇
  2015年   46篇
  2014年   41篇
  2013年   180篇
  2012年   55篇
  2011年   50篇
  2010年   33篇
  2009年   26篇
  2008年   45篇
  2007年   33篇
  2006年   37篇
  2005年   29篇
  2004年   28篇
  2003年   27篇
  2002年   31篇
  2001年   19篇
  2000年   15篇
  1999年   12篇
  1998年   8篇
  1997年   7篇
  1996年   9篇
  1995年   6篇
  1994年   5篇
  1993年   9篇
  1992年   3篇
  1991年   7篇
  1990年   3篇
  1989年   3篇
  1988年   3篇
  1987年   1篇
  1986年   2篇
  1985年   2篇
  1984年   3篇
  1983年   2篇
  1982年   1篇
  1981年   2篇
  1980年   2篇
  1979年   1篇
  1978年   2篇
  1976年   1篇
  1971年   1篇
排序方式: 共有1075条查询结果,搜索用时 15 毫秒
71.
While U.S. national policies have been developed to support evidence-based (EB) lifestyle programs for older adults, there has been limited research to determine the extent to which these programs actually reach local communities. This study sought to identify factors that impact the implementation of EB physical activity, nutrition, and chronic disease management programs at regional (Area Agencies on Aging [AAAs]) and community levels (senior Centers [SCs]). Interviews were conducted with directors of four AAAs and 12 SCs to understand their perspectives on EB program implementation. Narratives revealed differences between AAAs and SCs regarding knowledge about EB programs and reasons to promote and adopt these programs. The only agreement occurred when discussing concerns about funding and program inflexibility. Substantial gaps exist between how EB lifestyle programs are promoted and implemented at the regional and community levels.  相似文献   
72.
Protecting and conserving environmental resources is a global concern. Over the past decade, a number of certification processes have emerged to help designers and operators of buildings assess the potential impact of a building on the environment. Certifications such as the Leadership in Energy and Environmental Design (LEED) consider the environmental impact through the lifecycle of a building, but may not be considering the people that construct and utilize it. It is important to remember the human factor. Considering the human factor throughout the lifecycle is crucial to ensure individuals are protected during construction and in operation in the built environment. The paper highlights how ergonomics can be integrated into the life cycle of a building to promote sustainability goals for both the human factor and the environment. A case study approach will be used to illustrate how ergonomics was integrated into a LEED renovation and expanded into its daily operations on a large university campus..  相似文献   
73.
The situation of families undergoing separation in a context of co‐occurrence of intimate partner violence (IPV) and child maltreatment raises certain issues related to child custody. The results presented in this paper were collected and analysed within the framework of a qualitative study aiming to identify the principal points of agreement and the main controversies amongst practitioners in several different types of organizations. Focus groups were held with a total of 43 practitioners from six different settings concerned with child custody in cases of co‐occurrence of IPV and child maltreatment. Although they agreed on the importance of ensuring the safety of victims of violence, their views diverged on three points: (1) the importance of preserving the father–child relationship; (2) collaboration between voluntary organizations and semi‐voluntary or legal agencies; and (3) consideration of cultural differences.  相似文献   
74.
Little is known about the experience of family and friends when a young adult goes missing, less is known about how siblings make sense of the experience. Police assistance to locate the missing person may be sought but there is little recognition of going missing or missingness as a social issue, and there is little or no adequate social response to the needs of those left behind. This paper links knowledge of siblings, loss and grief to an understanding of this phenomenon. It presents the methodology and findings of an exploratory, qualitative study into the experiences of nine adult siblings of long-term missing people in Australia and presents the themes drawn from their accounts. The themes are briefly elaborated using direct quotations from participants in the study and represented in a diagram. The paper seeks to develop greater understanding of the inter-relationship between missingness and other social issues, to give voice to the views of participants and to encourage practitioners to engage more purposefully in work with family and friends affected by this issue. Some implications for social work practice are presented.  相似文献   
75.
Staphylococcus aureus is a gram-positive, enterotoxin-producing coccus. It is a hardy organism and known to survive over a wide range of water activities, pH values, and temperatures. The objective of this study was to model the survival or gradual inactivation of S. aureus ATCC 13565 in intermediate moisture foods (IMFs). Various initial concentrations (approximately 10(1), 10(2), 10(3), and 10(4) CFU/g) were used to inoculate three different IMFs (beefsteak, bread, and chicken pockets). Viable counts were determined up to 60 days using tryptic soy agar. Inoculum size did not influence the survival or gradual inactivation of S. aureus in these foods. The rate of change (increase or decrease) in log CFU/day was calculated for every consecutive pair of data points and by linear regression for each inactivation curve. Both consecutive pair and linear regression rates of change were fit to logistic distributions (with parameters alpha and beta) for each food. Based on the distribution parameters, survival or gradual inactivation of S. aureus was predicted by computer simulation. The simulations indicated an overall decline in S. aureus population over time, although a small fraction of samples in the consecutive pair simulation showed a slight population increase even after 60 days, consistent with the observed data. Simulation results were compared to predictions from other computer models. The models of Stewart et al., were fail-safe, predicting the possibility of significant growth only after > 3,000 days. The USDA pathogen modeling program predictions were found to be fail-dangerous, predicting declines at least four times faster than observed.  相似文献   
76.
Audiotapes of the voices of77 preschool children were prepared. Subjects listened to the tapes, and then provided their impressions of the competence, leadership, dominance, warmth, and honesty of the children. Judgments of the voices' babyishness and attractiveness were also obtained. Perceivers reliably discriminated the children's voices along the dimensions of babyishness and attractiveness. Moreover, analyses revealed that the previously documented impact of these characteristics on first impressions of adults extends to impressions of young children. The similarity of the effects of these characteristics on impressions formed about children to those revealed for adults suggests that vocal qualities may have an impact on personality development via a process of self-fulfilling prophecy.  相似文献   
77.
This study investigated attachment security and behavior in 34 physically disabled infants and 26 non‐disabled infants by using convergent, categorical (secure, avoidant and ambivalent) and continuous (Attachment Behavior Q‐Set) measures of the relationship, based on the same set of home observations. Proportions of attachment classifications were not different for disabled and non‐disabled infants, but insecure infants in the disabled group scored consistently lower on the AQS security score than non‐disabled insecure infants. This result suggests that while proportions of attachment classifications may not vary as a function of infant status, insecure disabled infants are more insecure than insecure non‐disabled infants. An analysis of 5 behavioral dimensions of the AQS showed that secure infants emitted the same kinds of attachment behaviors without regard for infant status. Insecure disabled infants, however, showed lower levels of secure base behavior and physical contact with mother than their non‐disabled counterparts, and showed a marginal tendency to fuss more as well. Discussion focuses on the potential benefits of using convergent, categorical and continuous measures of attachment in the study of both typical and atypical groups of infants.  相似文献   
78.
We developed models for the analysis of recapture data for 2678 serins ( Serinus serinus ) ringed in north-eastern Spain since 1985. We investigated several time- and individual-specific factors as potential predictors of overall mortality and dispersal patterns, and of gender and age differences in these patterns. Time-specific covariates included minimum daily temperature, days below freezing, and abundance of a strong competitor, siskins ( Carduelis spinus ) during winter, and maximum temperature and rainfall during summer. Individual covariates included body mass (i.e. body condition), and wing length (i.e. flying ability), and interactions between body mass and environmental factors. We found little support of a predictive relationship between environmental factors and survival, but good evidence of relationships between body mass and survival, especially for juveniles. Juvenile survival appears to vary in a curvilinear manner with increasing mass, suggesting that there may exist an optimal mass beyond which increases are detrimental. The mass-survival relationship does seem to be influenced by at least one environmental factor, namely the abundance of wintering siskins. When siskins are abundant, increases in body mass appear to relate strongly to increasing survival. When siskin numbers are average or low the relationship is largely reversed, suggesting that the presence of strong competition mitigates the otherwise largely negative aspects of greater body mass. Wing length in juveniles also appears to be related positively to survival, perhaps largely due to the influence of a few unusually large juveniles with adult-like survival. Further work is needed to test these relationships, ideally under experimentation.  相似文献   
79.
This article investigates recent data on the prevalence of women in the field of sociology in order to understand whether or not the discipline has become a female preserve. Data on the top sociology departments in the USA were collected in 2007. For each university, we document the number of full time, tenured and tenure-track faculty members and present the gendered makeup of the department. Our data present mixed findings with regard to the question of whether the field is tipping toward female. Women, overall, are underrepresented in the sociology programs sampled, but a larger percentage of women occupy tenured positions within the top liberal arts programs than at the top graduate programs. And, women occupy a slim majority of assistant professor positions but have lower numbers at higher academic ranks. We can say with reasonable certainty that, while the proportion of women doctorates and assistant professors indicate a feminization of sociology, the entire discipline has not yet tipped toward female.  相似文献   
80.
A pressing need in the area of food safety is a tool for making overall, macro-judgments about which risks should be given priority for management. Governments often seek to base this prioritization on public health impacts only to find that other considerations also influence the prioritization process. A multi-factorial approach formally recognizes that public health, market-level impacts, consumer risk preferences and acceptance, and the social sensitivity of particular risks all play a role in prioritization. It also provides decision-makers with a variety of information outputs that allow risk prioritization to be considered along different dimensions. Macro-level prioritization of risks based on multiple factors is an important expanded use of cost–benefit analysis to manage risk.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号