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排序方式: 共有71条查询结果,搜索用时 15 毫秒
1.
Fukuko Kobayashi 《Gender Issues》1991,11(2):43-64
This article is a slightly revised version of an article that appeared in the journalWaseda Shōgaku (Waseda Commercial Review) no. 335, July 1990. 相似文献
2.
Yoshikazu Ojima 《Journal of applied statistics》1998,25(6):785-799
Staggered nested experimental designs are the most popular class of unbalanced nested designs. Using a special notation which covers the particular structure of the staggered nested design, this paper systematically derives the canonical form for the arbitrary m-factors. Under the normality assumption for every random variable, a vector comprising m canonical variables from each experimental unit is normally independently and identically distributed. Every sum of squares used in the analysis of variance (ANOVA) can be expressed as the sum of squares of the corresponding canonical variables. Hence, general formulae for the expectations, variances and covariances of the mean squares are directly obtained from the canonical form. Applying the formulae, the explicit forms of the ANOVA estimators of the variance components and unbiased estimators of the ratios of the variance components are introduced in this paper. The formulae are easily applied to obtain the variances and covariances of any linear combinations of the mean squares, especially the ANOVA estimators of the variance components. These results are eff ectively applied for the standardization of measurement methods. 相似文献
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4.
Much research shows that breastfeeding provides short- and long-term health benefits for both mothers and their children. However, few studies have yet investigated the factors which may promote or inhibit breastfeeding practices in Japan. To fill this research gap, this paper uses data newly gathered in 2012 on breastfeeding initiation and duration for each child of each mother, which enable us to estimate mother fixed-effects models that control for unobserved differences among mothers. Compared to mothers who leave their jobs after childbirth, mothers who return to work within a year after childbirth do not significantly differ in breastfeeding initiation but have a breastfeeding duration which is shorter by 1.654 months. On the other hand, when fathers work under a flextime system after childbirth, breastfeeding initiation is higher, and the duration is longer by 4.418 months. Therefore, letting fathers work under a flextime system would help promote breastfeeding practices in Japan. 相似文献
5.
Considering the integral relationship between public relations and democracy (Martinelli, 2011) coupled with the growing use of social media for democratic aims (Smith, 2011) the current study examines the effectiveness of Twitter as a public relations communications tool for congressional campaigns. Specifically, as a means of testing Twitter's effectiveness in informing and engaging voters, congressional candidate and political party Twitter use for all 435 U.S. House of Representatives races (N = 1284) are compared with 2010 election outcomes. Results indicate that candidates’ Twitter use significantly increased their odds of winning, controlling for incumbency and Party ID. Additionally, significant differences between incumbents’ and challengers’ Twitter use during the election cycle emerged, which has important implications for public relations practices aimed at achieving democratic outcomes. 相似文献
6.
Toshiyasu Amano Teruaki Iwamoto Yoshikazu Sato Tetsuya Imao Carolyn Earle 《The aging male》2018,21(3):170-175
Introduction: It is well known that there is a reduction of circadian rhythm in blood testosterone levels with aging. Our previous report revealed that 3?mg of short-acting testosterone ointment (Glowmin: GL) elevated serum testosterone levels to within the physiological range for 4–6?h. The aim of this study was to clarify the clinical efficacy and safety of GL used topically once every morning, to enhance the circadian rhythm of testosterone, for late-onset hypogonadism (LOH).Methods: A total of 61 LOH patients received 3?mg of GL topically once a day in the morning on scrotal skin for 24 weeks. The clinical efficacy of GL was evaluated by the aging males symptoms (AMS) scale, and blood sampling tests were measured before and after GL treatment.Results: Mean patients age was 55.3?±?9.2 years old. Total AMS scores at 4, 12, and 24 weeks after GL treatments significantly decreased. The results of sub-analysis of AMS, including psychological, physical, and sexual factors also significantly improved after GL treatments. No severe adverse reactions or abnormal laboratory data were reported.Conclusions: This study shows that TRT for LOH with once daily GL treatment supports testosterone circadian rhythm and should be considered to be an effective and safe therapy for LOH. 相似文献
7.
Rapid growth of technology innovations promotes governments world-wide to actively explore the best way to realize its economic benefits. Likewise, Chinese government has positioned advances of high technology a driving-force to continued economic achievements, and launched various high-tech policies. This case study focuses on computer-aided design (CAD), a key field under policy support, discloses policy’s critical role. Interview/survey data from corporate and academic leaders were also collected and synthesized. The emergence of university–industry collaboration, capitalizing university intellectual property, and new modes in CAD innovation and technology diffusion are among those major findings. A Model is also proposed. The study provides new observations for debates to high-tech policy-makers and can benefit scholars and business managers seeking to understand the environment in China, and serve as a foundation for further policy and management research. 相似文献
8.
Shiro Kobayashi 《Researches on Population Ecology》1973,15(1):223-237
Summary A simple mathematical model describing the species-area relation was developed. This paper dealt with the case that discrete
random samples are combined.
Modelling was made on the assumption that the occurrence probability of a species in a quadrat has a continuous density distribution.
The model, given by the equation (6), holds only for a particular size of quadrat (i.e. the characteristic area). More general
form applicable to the quadrats the size of which is near to the characteristic area was represented by the equation (9).
Validity of the model was examined for the data of plant and insect communities, and it was concluded that the observation
can be predicted by the model unless the size of sampling unit considerably differs from the characteristic area.
The uniformity of specific density (i. e. the number of species per quadrat) and the size of characteristic area were discussed
as being important in an understanding of community structure.
Contributions from JIBP-CT No. 144. 相似文献
9.
A Cross‐Cultural Examination of the Disjuncture Between Aspirations and Expectations/Perceived Outcomes: Strain and Academic Deviance in the United States and Japan
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Using comparable self‐reported survey data collected among college students in the United States (n = 502) and Japan (n = 441), this study examines a paradox of higher academic deviance among otherwise more conforming Japanese youth while revisiting the debate concerning the disjuncture between aspirations and expectations/perceived outcomes in Agnew's general strain theory (GST). Confirming the paradox, our results indicate that Japanese students are significantly more deviant academically than American students. However, contrary to the expectation of GST, but in support of past empirical studies, the higher academic deviance among the Japanese, as compared to Americans, is explained by their lower aspirations, irrespective of the levels of expectations/perceived outcomes 相似文献
10.