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71.
Early in 2007, the CSIR conducted an experiment to track the cellular telephones of a small group of people as they moved to and from an event, to test the viability of using such tracking to provide the participants with useful traffic information. This project raised a number of ethical issues, which prompted this paper and which we discuss here. These include:
- • the ethics of modelling data, including the treatment of research participants;
- • privacy and surveillance issues related to tracking the movement of people;
- • the risks inherent in being tracked vs the benefits of being tracked; and
- • the ethics related to sending messages to drivers.
72.
The problem of missing observations in regression models is often solved by using imputed values to complete the sample. As an alternative for static models, it has been suggested to limit the analysis to the periods or units for which all relevant variables are observed. The choice of an imputation procedure affects the asymptotic efficiency of the method used to subsequently estimate the parameters of the model. In this note, we show that the relative asymptotic efficiency of three estimators designed to handle incomplete samples depends on parameters that have a straightforward statistical interpretation. In terms of a gain of asymptotic efficiency, the use of these estimators is equivalent to the observation of a percentage of the values which are actually missing. This percentage depends on three R2-measures only, which can be straightforwardly computed in applied work. Therefore it should be easy in practice to check whether it is worthwhile to use a more elaborate estimator. 相似文献
73.
Gabriël van Beusekom Laura Baams Henny M. W. Bos Geertjan Overbeek Theo G. M. Sandfort 《Journal of sex research》2016,53(1):98-108
We assessed whether homophobic name-calling accounts for the relationship between gender nonconformity and mental health (social anxiety and psychological distress) in a sample of 1,026 Dutch adolescents (boys: n = 517) ages 11 to 16 (Mage = 13.4). We also explored whether this hypothesized mediation differs by sexual attraction and biological sex. Data were collected by means of paper-and-pencil questionnaires at five secondary schools located in urban areas in the Netherlands. Mediation analysis indicated that gender nonconformity was related to both social anxiety and psychological distress partially via homophobic name-calling. Moderated mediation analysis further showed that the mediating role of homophobic name-calling varied according to levels of same-sex attraction (SSA) and biological sex. The mediation effects increased in magnitude when levels of SSA increased and were significant only for adolescents with mean and high levels of SSA. The mediation effects were significant for boys and girls in general, although the mediation effects were stronger for boys than for girls. Our findings emphasize the importance of research and school-level interventions to focus on factors that promote acceptance of cross-gender behavior among adolescents. 相似文献
74.
Larry D. Icard Jingwen Zhang John B. Jemmott Theo G. M. Sandfort Scott E. Rutledge Darelle Van Greunen 《Journal of homosexuality》2020,67(4):513-527
ABSTRACTThe goal of this study is to examine the relations between histories of three types of sexual orientation victimization (childhood, personal, and institutional) and HIV sexual risk behavior among Black South African men who have sex with men (MSM). Secondarily, this study examines whether marijuana use and problem drinking mediate the relations. Participants were 125 Black MSM recruited from neighborhoods in Eastern Cape Province, South Africa. Questionnaires administered through audio computerized self-interviewing assessed sexual orientation victimizations, problem drinking and marijuana use, and unprotected anal sex with casual partners. Data were analyzed using multiple regression and multiple mediation modeling.Personal and institutional sexual victimizations were associated with condomless anal sex. Childhood sexual orientation victimization was positively associated with problem drinking. Neither problem drinking nor marijuana use mediated the relations between sexual orientation victimizations and having condomless anal sex with casual partners. 相似文献
75.
Theo A. Klimstra Peter Kuppens Koen Luyckx Susan Branje William W. Hale III Annerieke Oosterwegel Hans M. Koot Wim H. J. Meeus 《Journal of research on adolescence》2016,26(3):459-473
Important linkages between daily mood and identity formation have been theorized, but have not been empirically tested as of yet. This study provided a first examination of these linkages within individuals (N = 392; 55.1% boys; Mage at T1 = 13.24, SD = 0.44) across 15 series of 5 days distributed over 5 years. Results revealed negative within‐time associations of educational and relational commitment with negative mood. Negative mood was positively associated with educational in‐depth exploration and educational and interpersonal reconsideration. Additionally, there were some cross‐lagged effects suggesting that identity and mood mutually affect one another across days. These results contribute to the growing knowledge on how identity unfolds in everyday life by revealing important associations with daily mood. 相似文献
76.
77.
Brigitte A. Bloem Theo G. Van Tilburg Fleur Thomése 《Journal of Housing for the Elderly》2013,27(1-2):28-47
The authors examined eight personal and contextual conditions associated with starting new relationships with neighbors after short- and long-distance moves. A total of 625 Dutch movers and 1,936 non-movers (57–93 years old) were selected from the Longitudinal Aging Study Amsterdam. OLS linear regression analyses showed that short-distance movers mainly started relationships with neighbors when they did volunteer work. Long-distance movers who moved to rural areas and felt safe in their new neighborhood or moved to areas with lower priced homes also started new relationships with neighbors. Contextual conditions appear to play a larger role than personal ones, especially after long-distance moves. 相似文献
78.
This paper examines the response of residents in one inner-city, racially, and economically diverse neighborhood to a sudden increase in crime, drugs and disorder. Rather than withdrawing, residents in this neighborhood responded by organizing a major collective effort to develop a stabilization plan for the neighborhood. Factors useful in understanding this atypical response include a citywide structure that encourages citizen participation, the city government's commitment to the neighborhood, a history of neighborhood activism, and residents' commitment to the neighborhood. A social movement perspective that examines the nature of successful social movement organizations, the political context of movement activities, and micromovement processes is useful in analyzing cases of neighborhood activism. 相似文献
79.
Sander C. S. Clahsen Irene van Kamp Betty C. Hakkert Theo G. Vermeire Aldert H. Piersma Erik Lebret 《Risk analysis》2019,39(2):439-461
Why do countries regulate, or prefer to regulate, environmental health risks such as radiofrequency electromagnetic fields and endocrine disruptors differently? A wide variety of theories, models, and frameworks can be used to help answer this question, though the resulting answer will strongly depend on the theoretical perspective that is applied. In this theoretical review, we will explore eight conceptual frameworks, from different areas of science, which will offer eight different potential explanations as to why international differences occur in environmental health risk management. We are particularly interested in frameworks that could shed light on the role of scientific expertise within risk management processes. The frameworks included in this review are the Risk Assessment Paradigm, research into the roles of experts as policy advisors, the Psychometric Paradigm, the Cultural Theory of Risk, participatory approaches to risk assessment and risk management, the Advocacy Coalition Framework, the Social Amplification of Risk Framework, and Hofstede's Model of National Cultures. We drew from our knowledge and experiences regarding a diverse set of academic disciplines to pragmatically assemble a multidisciplinary set of frameworks. From the ideas and concepts offered by the eight frameworks, we derive pertinent questions to be used in further empirical work and we present an overarching framework to depict the various links that could be drawn between the frameworks. 相似文献
80.