全文获取类型
收费全文 | 433篇 |
免费 | 24篇 |
出版年
2020年 | 4篇 |
2019年 | 13篇 |
2018年 | 11篇 |
2017年 | 13篇 |
2016年 | 16篇 |
2015年 | 6篇 |
2014年 | 11篇 |
2013年 | 53篇 |
2012年 | 14篇 |
2011年 | 24篇 |
2010年 | 10篇 |
2009年 | 17篇 |
2008年 | 20篇 |
2007年 | 10篇 |
2006年 | 24篇 |
2005年 | 12篇 |
2004年 | 16篇 |
2003年 | 12篇 |
2002年 | 12篇 |
2001年 | 10篇 |
2000年 | 4篇 |
1999年 | 7篇 |
1998年 | 4篇 |
1996年 | 4篇 |
1992年 | 3篇 |
1991年 | 3篇 |
1990年 | 4篇 |
1989年 | 3篇 |
1988年 | 5篇 |
1987年 | 3篇 |
1986年 | 4篇 |
1985年 | 4篇 |
1984年 | 6篇 |
1983年 | 5篇 |
1981年 | 4篇 |
1979年 | 7篇 |
1978年 | 2篇 |
1977年 | 5篇 |
1976年 | 6篇 |
1975年 | 3篇 |
1974年 | 5篇 |
1973年 | 4篇 |
1972年 | 4篇 |
1971年 | 7篇 |
1970年 | 5篇 |
1968年 | 6篇 |
1967年 | 7篇 |
1966年 | 3篇 |
1950年 | 3篇 |
1949年 | 2篇 |
排序方式: 共有457条查询结果,搜索用时 46 毫秒
1.
Although a significant amount of research has focused on traditional media choice and use, and even on some ‘new’ media, these studies have either neglected the Internet and World Wide Web or were conducted prior to their recent popularity. This study offers a novel exploration of individuals' use of three Internet functions (information retrieval, information giving, and conversation capabilities) in the context of the use of other communication media. Data from 684 individuals demonstrate that the Internet is a multidimensional technology used in a manner similar to other, more traditional media. Specifically, conversation features of the Internet align with mediated interpersonal technologies (the telephone and electronic mail), whereas the Internet's information‐retrieval and information‐giving features are used in ways similar to mass media channels (newspapers, television, and books and magazines). In addition, needs fulfilled by these channels cluster in ways consistent with past research, regardless of the technologies employed to meet them. 相似文献
2.
Public goods theories highlight an incentive system that rewards ‘free riding’ on the contributions of early contributors toward collective actions. However, because such theories focus on creation of the good, they may underestimate returns that accrue to early contributors subsequent to the good's realization. The concept of formative investment is introduced here to describe the extent to which organizations help to create public goods such as interorganizational linkages like participatory federations. Data from the CEOs of 48 organizations involved in a participatory federation were used to assess how an organization's level of formative investment is related to later patterns of dependency and interaction among federation members. Findings suggest that from a long‐term perspective, and for goods that involve communication and interaction, the incentive structure may not be so favorable for free riders. To the extent that organizations with high formative investment have the capability to envision the future and communicate that vision to potential federation partners, they may be able to both reduce free riding and secure for themselves advantageous positions in the subsequent network of relations. 相似文献
3.
4.
D S Holmes B M McGilley B K Houston 《Journal of personality and social psychology》1984,46(6):1322-1327
To determine whether different levels of challenge had differential effects on the arousal levels of Type A and Type B persons, 30 Type A and 30 Type B male subjects worked on an intelligence test task (digits backwards recall) that was easy, moderately difficult, or extremely difficult. Arousal was measured in terms of systolic blood pressure, diastolic blood pressure, pulse rate, pulse volume, skin resistance, and subjective arousal. Results indicated that while working on the extremely difficult task, the Type A subjects evidenced reliably higher systolic blood pressure than did the Type B subjects (p = 0.1; difference = 7.52 mm of Hg) and that there were not reliable differences between the subjects in systolic blood pressure at other levels of challenge or on other measures of arousal. 相似文献
5.
In two separate experiments, 40 Ss were presented with recorded sentences during each of which a click occurred. Ss had to depress a key as soon as they heard the click. RTs were f aster when the click was located at the major syntactic break of the sentence compared with RTs to clicks not at a break. This confirmed the hypothesis that processing load is a function of the surface structure of sentences, although the role of minor breaks was not clear. A second finding was that RTs were slower when the click was in the first rather than in the second half of the sentence. This can also be explained in terms of differential processing loads. 相似文献
6.
7.
8.
9.
Molecular sequence data, made available in the last 15 years or so, have led to the classification of living cells into three phylogenetic domains: Bacteria, Archaea, and Eucarya. All the organisms that have been tested belonging to either domain were capable of mounting a stress response with essentially the same characteristics, regardless of the stressor. The protagonists in the cell's stress response are the stress genes and their protein products. Some of the latter are molecular chaperones. Under physiological conditions, these chaperones aid other cellular proteins to fold properly and achieve a native -functional- configuration, and to translocate from the place of synthesis to the cell's locale in which they will operate. In a stressed cell, the stress proteins that are chaperones protect other molecules from denaturation and help those partially damaged to regain a functional configuration. Thus, cell death is avoided and recovery is enhanced. The study of stress genes and proteins has progressed considerably in organisms belonging to the domains Bacteria and Eucarya. Less is known about the archaeal stress genes. Here, research with an organism from the Archaea is discussed, focusing on the stress genes of the hsp70 (dnaK) locus. Future perspectives for basic and applied research within the health sciences and biotechnology industries are presented. 相似文献
10.
Paul A. Holmes STD 《Journal of religion and health》1996,35(2):125-140
The treatment of intimacy failure in Roman Catholic priests in an outpatient program designed to treat sexual misconduct is
discussed here. Three case vignettes highlight a particular feature of an intimacy deficit that sets the stage for the priests'
sexual acting out. Intimacy, hypocrisy, and self-deception and the Catholic sacramental world view are discussed to shed light
on the treatment of sexual addiction in the clergy. Tapping into a priest's beliefs regarding the divine power arising from
his own ordination creates a nexus of healing where psychotherapy and spiritual direction join forces to produce a kind of
“sacramental psychology.”
This material was originally offered as part of a Grand Rounds presentation at St. Vincent's Hospital and Medical Center in
New York City. 相似文献