全文获取类型
收费全文 | 1912篇 |
免费 | 23篇 |
国内免费 | 1篇 |
专业分类
1936篇 |
出版年
2023年 | 15篇 |
2022年 | 19篇 |
2021年 | 37篇 |
2020年 | 42篇 |
2019年 | 43篇 |
2018年 | 68篇 |
2017年 | 56篇 |
2016年 | 80篇 |
2015年 | 40篇 |
2014年 | 51篇 |
2013年 | 206篇 |
2012年 | 74篇 |
2011年 | 106篇 |
2010年 | 51篇 |
2009年 | 44篇 |
2008年 | 61篇 |
2007年 | 64篇 |
2006年 | 46篇 |
2005年 | 47篇 |
2004年 | 67篇 |
2003年 | 47篇 |
2002年 | 31篇 |
2001年 | 29篇 |
2000年 | 26篇 |
1999年 | 23篇 |
1998年 | 25篇 |
1997年 | 18篇 |
1996年 | 18篇 |
1995年 | 24篇 |
1994年 | 21篇 |
1993年 | 15篇 |
1992年 | 23篇 |
1991年 | 15篇 |
1990年 | 20篇 |
1989年 | 15篇 |
1988年 | 21篇 |
1987年 | 17篇 |
1985年 | 15篇 |
1984年 | 16篇 |
1983年 | 23篇 |
1981年 | 14篇 |
1980年 | 14篇 |
1979年 | 19篇 |
1978年 | 14篇 |
1977年 | 16篇 |
1976年 | 14篇 |
1975年 | 14篇 |
1974年 | 17篇 |
1973年 | 15篇 |
1950年 | 13篇 |
排序方式: 共有1936条查询结果,搜索用时 15 毫秒
971.
Correlates of household smoking bans in low-income families of children with and without asthma 总被引:1,自引:1,他引:0
Wamboldt FS Balkissoon RC Rankin AE Szefler SJ Hammond SK Glasgow RE Dickinson WP 《Family process》2008,47(1):81-94
Exposure to secondhand smoke (SHS) harms all children's health, especially children with asthma. Yet, children with asthma are as likely to live with smokers as healthy children. Household smoking bans are being advocated to reduce children's harm from SHS. To measure the effect of household smoking bans on child SHS exposure and to examine correlates of strict smoking bans in a low-income, diverse sample, 91 children with asthma were matched to 91 healthy children. All had at least one smoker living in their homes. Nicotine dosimeters, child cotinine assays, and maternal reports quantified child SHS exposures. Maternal reports of household smoking rules, behaviors, and beliefs, and other family characteristics were also gathered. The presence of a strict household smoking ban vastly reduced children's SHS exposures and was associated with fewer cigarettes smoked by the mother and by other family members, the belief that SHS was a personal health risk, having children with asthma, and living in a single-family home. Many children are exposed to high levels of SHS at home. Strict household smoking bans greatly decrease, but do not eliminate children's SHS exposure. Even in disadvantaged families, mutable factors were associated with strict smoking bans. Increased dissemination and use of established public health strategies are needed to reduce children's SHS exposures. 相似文献
972.
Abstract. As the result of an extensive self‐study for the purpose of reaccreditation, the Department of Theology at The University of Portland began offering a new series of courses called Theological Perspective Courses (THEP). THEP courses are upper division and offered by theology faculty in conjunction with another department that has required core courses in the College of Arts and Sciences. They are intended to be interdisciplinary, with two faculty members from different disciplines collaborating on new course design and implementation. THEP 482, Theology in Ecological Perspective, was one of the first two THEP courses taught. This article describes and reflects on the nature of this religion and science course in terms of subject matter, learning theory, and development of community. Several additional appendices to this article appear online at: http://www.wabashcenter.wabash.edu/journal/article2.aspx?id=12397 相似文献
973.
Excerpts from Chapters 1 and 3 of New Maps for Old: Explorations in Science and Religion (Gerhart and Russell 2001) explore the ramifications of metaphoric process for changes in thinking, especially those changes that lead to a new understanding of our world. Examples are provided from science, from religion, and from science and religion together. In excerpts from Chapter 8, a double analogy—theology is to science as science is to mathematics—is proposed for better understanding the contemporary relationship between science and religion. A conservation of epistemological sufficiency is disclosed as one moves from mathematics to empirical science to theology—a move from one discipline to another that involves a sacrifice of one aspect of thought to gain another. 相似文献
974.
Steroid hormones play a critical role in the initiation and maintenance of pregnancy. In particular, the important role that the progesterone metabolite, and neurosteroid, allopregnanolone, may play in fetal and adolescent development is becoming increasingly evident. Unlike steroid hormones, neurosteroids act at nontraditional targets in the central and peripheral nervous systems, including GABA(A) receptor complexes. This commentary discusses the three works in this issue that elucidate the important role of allopregnanolone in the mechanisms that regulate stress hypo-sensitivity of rodents in late pregnancy, neuroprotective effects in fetal sheep exposed to a hypoxic insult, and the continuing role that prefrontal cortex formation of allopregnanolone may play on the cognitive development of gestationally stressed rat offspring, grown to adolescence. The narrative that these works comprise was facilitated by the 5(th) International Meeting on Steroids and the Nervous System (Torino, Italy), which is organized to update our knowledge on the relationships between steroid hormones synthesized in different organs and the nervous system. Topics covered in this most recent meeting included sex differences in, and hormonal influences on, cannabinoid-regulated biology; steroids and pain; the importance of co-regulatory factors for steroid receptor action in the brain; mechanism and role of estrogen-induced nonclassical signaling in the brain; vitamin D as the forgotten neurosteroid; neurosteroids and GABA(A) receptors; and pathogenic mechanisms mediated by glucocorticoid receptors in psychiatric disorders. The 6(th) International Meeting on Steroids and the Nervous System will be held in Torino, Italy in February 2011. 相似文献
975.
Schettino JR Olmos NT Myers HF Joseph NT Poland RE Lesser IM 《Mental health, religion & culture》2011,14(8):805-818
The present study examined the relationship between religiosity/spirituality and treatment response to antidepressant medication (citalopram). One-hundred and forty-eight Caucasian and African-American adults with uncomplicated major depression were treated with citalopram (20-60mg/day) over an 8-week period in a prospective multi-site clinical trial. Treatment response was assessed weekly with the Hamilton Rating Scale for Depression. Religiosity (i.e., religious behaviours) and spirituality (i.e., spiritual well-being) were assessed at Week 3. No significant associations between spirituality and treatment response were found; however, there was a strong curvilinear relationship between religiosity and treatment response. Compared to lower or higher levels of religiosity, a moderate level of religiosity was significantly associated with a higher likelihood of remission and greater reduction in severity of depression. This association was independent of social support, ethnicity, gender, education, and baseline depression severity. A moderate amount of religiosity appears to be independently associated with an enhanced treatment response to citalopram. 相似文献
976.
977.
978.
Environmental perception is prerequisite to most vertebrate behavior and its modern investigation initiated the founding of experimental psychology. Navigation costs may affect environmental perception, such as overestimating distances while encumbered (Solomon, 1949). However, little is known about how this occurs in real-world navigation or how it may have evolved. We manipulated the most commonly navigated surfaces with a non-intuitive cost derived from evolved navigation theory. Observers in realistic settings unknowingly overestimated horizontal distances that contained a risk of falling and did so by the relative degree of falling risk. This manipulation produced previously unknown, large magnitude illusions in everyday vision in the environments most commonly navigated by humans. These results bear upon predictions from multiple fundamental theories of visual cognition. 相似文献
979.
Corcoran KE Pettinicchio D Young JT 《The British journal of social psychology / the British Psychological Society》2011,50(4):575-605
Most research on efficacy and participation in collective action has focused on single country samples with little attention paid to the relationship between efficacy and country-level structural factors. Drawing on value expectancy theory, we theorize a link between macro-level political institutions and micro-level efficacy. To address the previous limitations in the efficacy and collective action literature, we use multi-level, cross-national data, and present results from a series of hierarchical models testing whether efficacy increases collective action cross-nationally, whether political institutions affect efficacy, and whether the effect of efficacy on collective action is conditional on political institutions. We find that efficacy increases collective action, that certain political institutions increase efficacy, and that the effect of efficacy on collective action is partly conditional on the inclusiveness of a country's political institutions. These findings suggest the insufficiency of purely structural as well as social psychological explanations of collective action. 相似文献
980.
Matheson Russell 《Husserl Studies》2011,27(1):41-62
Over four decades, Habermas has put to paper many critical remarks on Husserl’s work as occasion has demanded. These scattered
critical engagements nonetheless do add up to a coherent (if contestable) position regarding the project of transcendental
phenomenology. This essay provides a comprehensive reconstruction of the arguments Habermas makes and offers a critical assessment
of them. With an eye in particular to the theme of intersubjectivity (a theme of fundamental interest to both thinkers), it
is argued that Habermas’s arguments do indeed show up deficiencies in Husserlian phenomenology and yet that they do not succeed
in proving that we must abandon the methods and tasks of phenomenological research. On the contrary, it is argued that phenomenological
methods may well be needed in order to investigate certain philosophical questions that Habermas’s theory of communication
has thus far only partially addressed. 相似文献