全文获取类型
收费全文 | 340篇 |
免费 | 7篇 |
专业分类
管理学 | 63篇 |
人口学 | 25篇 |
理论方法论 | 28篇 |
综合类 | 1篇 |
社会学 | 194篇 |
统计学 | 36篇 |
出版年
2019年 | 5篇 |
2018年 | 9篇 |
2017年 | 4篇 |
2016年 | 6篇 |
2015年 | 3篇 |
2014年 | 6篇 |
2013年 | 85篇 |
2012年 | 19篇 |
2011年 | 6篇 |
2010年 | 2篇 |
2009年 | 6篇 |
2008年 | 3篇 |
2007年 | 9篇 |
2006年 | 6篇 |
2005年 | 7篇 |
2004年 | 7篇 |
2003年 | 5篇 |
2002年 | 5篇 |
2001年 | 6篇 |
2000年 | 6篇 |
1999年 | 2篇 |
1998年 | 6篇 |
1997年 | 5篇 |
1996年 | 5篇 |
1995年 | 6篇 |
1994年 | 9篇 |
1993年 | 8篇 |
1992年 | 6篇 |
1991年 | 8篇 |
1990年 | 9篇 |
1989年 | 2篇 |
1988年 | 6篇 |
1987年 | 6篇 |
1986年 | 4篇 |
1985年 | 4篇 |
1984年 | 5篇 |
1983年 | 5篇 |
1982年 | 5篇 |
1981年 | 7篇 |
1980年 | 6篇 |
1979年 | 4篇 |
1978年 | 2篇 |
1977年 | 5篇 |
1976年 | 4篇 |
1975年 | 3篇 |
1973年 | 2篇 |
1972年 | 2篇 |
1970年 | 1篇 |
1968年 | 1篇 |
1964年 | 1篇 |
排序方式: 共有347条查询结果,搜索用时 15 毫秒
331.
Mortality Risks Induced by Economic Expenditures 总被引:5,自引:0,他引:5
Ralph L. Keeney 《Risk analysis》1990,10(1):147-159
Existing evidence shows that lower incomes are associated with higher mortality risks. This paper examines the implications for fatalities when the relationship is interpreted as an induced relationship, meaning that lower incomes will on average lead to higher mortality risks. A model is developed for estimating the number of fatalities possibly induced by economic expenditures. This model accounts for different allocations of the expenditures on family units with varying income levels. Illustrative calculations provide insights about the possible significance of fatalities induced by economic expenditures. These results suggest that some expensive regulations and programs intended to save lives may actually lead to increased fatalities. Important caveats to reduce the likelihood of misinterpreting or misusing the results are included. 相似文献
332.
333.
334.
The two-stage clonal expansion model is a popular model for carcinogenesis data. One common form of this model is based on the approximate hazard function. In certain situations, this formulation is not appropriate, and the exact hazard should be applied. However, the difficulty of implementing the model based on the exact hazard has deterred many from using it. This paper presents a program implementing the exact hazard model for piecewise constant dosing using SAS, a package that is readily available to most that are interested in this type of analysis. Also, an analysis of the ED01 data is presented using this program, and comparisons are made to an earlier analysis based on the approximate hazard. By allowing for an independent background tumor mechanism, an excellent fit to the bladder tumor incidence data was obtained. 相似文献
335.
Ralph F. Dunn Ph.D. Joseph R. Lanning Ph.D. Vernon D. Patch M.D. John B. Sturrock M.D. 《Journal of American college health : J of ACH》2013,61(6):321-325
Abstract The College Center is a unique mental health facility providing care for thousands of students from many colleges in the Greater Boston area. The authors report on data collected during the 1975–76, 1976–77 school years regarding patient variables such as: gender, year in school, academic major, presenting problem, and others. The center's handling of these patients is reported in terms of diagnoses, treatment recommendations, and numbers of visits. Several commonly held staff assumptions and hypotheses are tested, and from the data available in this study, are not generally confirmed. The impressions, however, of a more recent decrease in antisocial acting out behavior and drug abuse (other than alcohol) and an increase in patients presenting with more classical neurotic and adjustment symptoms are confirmed. 相似文献
336.
337.
338.
Ralph Garber 《Journal of Social Work Education》2013,49(1):123-124
This article presents the results of focus groups conducted with participants following the completion of a Child Welfare Practice Certificate Program. Concept mapping was used as the guiding research method for the data collection and analysis. Social work students and child welfare workers generated statements during the focus group session that were then sorted into conceptual piles. Participants then rated the statements as to their importance and practicality and their interest in learning about them. Results revealed that the concept Reporting, Assessment, and Case Planning in the Real World was rated highest in all three categories. Recommendations are provided regarding infusing a child welfare curriculum into social work programs, and the authors discuss how concept mapping can be used in evaluation research. 相似文献
339.
Ralph J. Diclemente Ph.D. Cheri A. Pies MSW MPH Elizabeth J. Stoller MPH Christie Straits MS Geraldine E. Olivia MD MPH Joan Haskin MA 《Journal of sex research》2013,50(2):188-198
Students in 3 middle (n=385) and 3 high schools (n=254) in the San Francisco Unified School District participated in the evaluation of an AIDS education curriculum. Classes within‐schools were designated as either intervention classes or nonintervention classes. Students in intervention classes received 3 class periods of AIDS instruction with a newly developed curriculum. Students in nonintervention classes did not receive any special AIDS instruction. All students completed a pretest and posttest AIDS knowledge and attitude survey. The results indicated that AIDS instruction classes demonstrated a significant knowledge‐advantage, as well as change in attitudes (e.g., reflecting greater tolerance for attending class with students who may have AIDS or HIV infection). 相似文献
340.
This study prospectively examined associations among multiple theoretically informed risk (e.g., depression, sexual sensation seeking, and risky peers norms) and protective factors (e.g., social support, STI knowledge, and refusal to have sex self efficacy) on unsafe sex among 715 African American adolescent females aged 15–21 who participated in an STI/HIV prevention intervention. Generalized estimating equation models were used to assess associations between baseline characteristics and sexual risk over a 12-month follow-up period. Overall risk in this population was high: at baseline, nearly a third of women reported sex under the influence of alcohol or substances; ≥ 2 partners for vaginal sex, and casual sex partners in the 60 days prior to baseline, and nearly 75% of those reporting vaginal sex used condoms inconsistently. In multivariable analysis, when risk and protective factors were simultaneously considered, higher levels of sexual sensation seeking were associated with having multiple sex partners and inconsistent condom use. Greater perception of risky peer norms was associated with a higher risk of having sex under the influence of alcohol or drugs. In addition, higher sex refusal self-efficacy was protective against having multiple; casual; and concurrent sex partners. Incorporating these salient factors into prevention programs may be critical to the development of targeted interventions for this population. 相似文献