全文获取类型
收费全文 | 302篇 |
免费 | 7篇 |
专业分类
教育 | 195篇 |
科学研究 | 30篇 |
各国文化 | 5篇 |
体育 | 41篇 |
文化理论 | 3篇 |
信息传播 | 35篇 |
出版年
2022年 | 5篇 |
2021年 | 6篇 |
2020年 | 15篇 |
2019年 | 10篇 |
2018年 | 15篇 |
2017年 | 23篇 |
2016年 | 24篇 |
2015年 | 15篇 |
2014年 | 14篇 |
2013年 | 49篇 |
2012年 | 19篇 |
2011年 | 15篇 |
2010年 | 11篇 |
2009年 | 14篇 |
2008年 | 8篇 |
2007年 | 11篇 |
2006年 | 4篇 |
2005年 | 1篇 |
2004年 | 3篇 |
2003年 | 7篇 |
2002年 | 1篇 |
2001年 | 1篇 |
2000年 | 2篇 |
1998年 | 2篇 |
1997年 | 3篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1992年 | 3篇 |
1991年 | 3篇 |
1990年 | 4篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1986年 | 1篇 |
1984年 | 1篇 |
1983年 | 3篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1978年 | 1篇 |
1977年 | 1篇 |
1976年 | 2篇 |
1975年 | 1篇 |
1973年 | 1篇 |
1966年 | 1篇 |
1965年 | 1篇 |
排序方式: 共有309条查询结果,搜索用时 15 毫秒
61.
Juan-Gabriel Cegarra-NavarroAuthor Vitae Gabriel Cepeda-CarrionAuthor Vitae 《International Journal of Information Management》2011,31(5):420-427
The Spanish health care system has undergone important changes with regard to the development of new homecare services known as “Hospital in the Home”. This paper investigates the approaches that hospital in the home units (HHUs) have used to update physician/patient knowledge and the technology knowledge of their members and relates them to an unlearning context and improvement in the quality of health services. These relationships are examined through an empirical investigation of 55 doctors and 62 nurses belonging to 44 HHUs. The research findings suggest that the key benefits of an unlearning context in HHUs are clear: it enables them to identify and replace poor practices and also avoids the reinvention of the wheel; it enables cost reduction by minimizing unnecessary work caused by the use of poor methods; and it enables improvements in services to patients. 相似文献
62.
Excessive foot pronation is a risk factor of running injuries and motion control footwear is designed to control foot pronation. With the movement transfer between foot pronation and tibial rotation, motion control footwear may not only be confined to controlling foot pronation. In view of the controversies in the literature on effectiveness of motion control footwear, this paper reviewed the efficacy of motion control footwear functions as reported in the literature. Eligible studies were identified from seven electronic databases. Two independent authors extracted the data and assessed the methodological qualities using the Jadad Scale. A total of 14 quasi randomised controlled trials were included. Even though the included studies were rated as "low quality" according to the Jadad Scale, the data were pooled and analysed. Results revealed that motion control footwear was effective in reducing the amount of foot pronation and the peak vertical impact during landing. There is no evidence that suggests motion control footwear for controlling kinematics of the proximal segments. 相似文献
63.
Gian Luca Salvagno Elisa Danese Gabriel Lima-Oliveira Gian Cesare Guidi Giuseppe Lippi 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2013,23(2):201-205
Background
It is still uncertain whether or not avoidance to let disinfectant alcohol dry at the site of venipuncture is a source of spurious hemolysis when drawing venous blood.Methods:
In a consecutive series of 52 outpatients referred for routine laboratory testing, venous blood was drawn by direct venipuncture with (odd group) or without (pair group) wiping 70% isopropyl alcohol at the site of venipuncture. A 3.5 mL evacuated tube with clot activator and gel separator was drawn from a vein of the upper limb, serum was immediately separated with standard centrifugation and tested for potassium, lactate dehydrogenase (LD), aspartate aminotransferase (AST) and hemolysis index (HI) on Roche Cobas.Results:
No specimen was discarded for unsatisfactory venipuncture. No differences for age and gender were observed between groups. As regards the four parameters investigated, no significant differences could be observed between patients in whom blood was drawn with or without letting the alcohol dry. It is also noteworthy that no sample in both groups exceeded the conventional sample rejection threshold of cell-free hemoglobin.Conclusions:
The results of our prospective, randomized study attest that failure to wipe alcohol at the site of venipuncture should not be considered as a potential source of spurious hemolysis when drawing blood. 相似文献64.
Gabriel Lima-Oliveira Giuseppe Lippi Gian Luca Salvagno Martina Montagnana Geraldo Picheth Gian Cesare Guidi 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2013,23(2):218-223
Procedures involving phlebotomy are critical for obtaining diagnostic blood specimens and represent a well known and recognized problem, probably among the most important issues in laboratory medicine. The aim of this report is to show spurious hyperkalemia and hypocalcemia due to inadequate phlebotomy procedure. The diagnostic blood specimens were collected from a male outpatient 45 years old, with no clinical complaints. The tubes drawing order were as follows: i) clot activator and gel separator (serum vacuum tube), ii) K3EDTA, iii) a needleless blood gas dedicated-syringe with 80 I.U. lithium heparin, directly connected to the vacuum tube holder system. The laboratory testing results from serum vacuum tube and dedicated syringe were 4.8 and 8.5 mmol/L for potassium, 2.36 and 1.48 mmol/L for total calcium, respectively. Moreover 0.15 mmol/L of free calcium was observed in dedicated syringe. A new blood collection was performed without K3EDTA tube. Different results were found for potassium (4.7 and 4.5 mmol/L) and total calcium (2.37 and 2.38 mmol/L) from serum vacuum tube and dedicated syringe, respectively. Also free calcium showed different concentration (1.21 mmol/L) in this new sample when compared with the first blood specimen. Based on this case we do not encourage the laboratory managers training the phlebotomists to insert the dedicated syringes in needle-holder system at the end of all vacuum tubes. To avoid double vein puncture the dedicated syringe for free calcium determination should be inserted immediately after serum tubes before EDTA vacuum tubes. 相似文献
65.
The present study integrates two concepts: the notion of opinionleadership, as conceptualized and measured by the Strength ofPersonality (SP) scale, and the agenda-setting process. Thus,we suggest and test a two-step flow model in which certain individuals,the influentials, identify emerging issues in the mass mediaand then diffuse these issues to others via their personal networks.Based on a series of six national surveys conducted in Germany(1990) measuring issue salience and various personal characteristics,this study highlights the role certain individuals play in theemergence of the public agenda. The degree to which individualscan be influenced, measured by the SP scale, is found to bea powerful predictor of the formation of personal agendas, withhigh SP individuals differing from others in their identificationof emerging public issues. However, the analysis reveals thecomplexity of these relationships: they depend on the obtrusivenessof the issue, and they vary over time and location (East orWest Germany). The findings encourage the empirical pursuitof the suggested two-step flow model as appliedto the agenda-setting process. 相似文献
66.
67.
Gabriel Jacobs & Catherine Rodgers 《British journal of educational technology : journal of the Council for Educational Technology》1997,28(4):292-304
This paper analyses the psychological, technical, administrative, organisational, institutional and general pedagogical problems encountered during Phase 1 (the trial phase) of a trans-European distance-learning project. Using basic-rate ISDN videoconferencing for remote interactive tutorials, Phase 1 involved the University of Wales Swansea and HEC Liège (Belgium), and provided practice in business English for Belgian students and business French for UK students of French and Business. The difficulties which have arisen during the phase have been many and varied, and not all could have been easily predicted from a review of the research literature. Solutions to some of them are suggested. 相似文献
68.
Two studies were carried out during university workshops, and analyzed the effects of resource interdependence on student‐student interactions, and the impact of these interactions on performance. Students worked cooperatively, either on complementary information (positive resource interdependence) or on identical information (resource independence). In Study 1, analysis of videotaped interactions revealed that working on complementary information produced more positive interactions; however this was not sufficient to prevent students who had no direct access to the information from being disadvantaged, because of informational dependence. In Study 2, with simpler texts allowing better information transmission, performance was favored when students worked on complementary information. Moreover, working on identical information not only enhanced confrontations of point of views, it also elicited competence threat. Further analysis revealed that competence threat mediated resource interdependence effect on performance. Discussion provides insights into the conditions in which different cooperative methods can benefit learning. 相似文献
69.
Evaristo Jiménez-Contreras Félix de Moya AnegónEmilio Delgado López-Cózar 《Research Policy》2003,32(1):123-142
This article outlines the evolution of international scientific production in Spain over the last 25 years, a period characterised by steady growth in research production. The following stages in this process are identified in accordance with some of the factors that predominated at different times. From 1974 to 1982 production increased due to causes endogenous to the scientific system itself, as scientists brought their work into line with the patterns which characterised research in other industrialised countries. From 1982 to 1991 the prioritisation of R&D by government administrative bodies represented a constant stimulus, implemented through a set of legal measures, investments and the creation of posts for new researchers. From 1989 to the present the creation of the Comisión Nacional de Evaluación de la Actividad Investigadora (National Commission for the Evaluation of Research Activity, CNEAI) and the research incentive system have provided a further stimulus, which has led to the maintenance of, and an increase in, the rate of research production in spite of the net decrease in the monetary value of research grants awarded during the last period analysed. Other special characteristics of Spanish research, such as its dependence on the public sector and its essentially academic nature, are discussed. 相似文献
70.
Carlos P. Hipolito‐Delgado 《Journal of College Counseling》2016,19(2):98-109
For Latina/o undergraduates, ethnic identity is an important construct linked to self‐esteem and educational attainment. Internalized and perceived racism have been hypothesized to hinder ethnic identity development in Latina/o undergraduates. To assess if internalized and perceived racism were inversely related to ethnic identity, the author conducted a hierarchical linear regression with 373 Latina/o undergraduates. There was a significant relationship between internalized racism and ethnic identity. Findings indicate a need to challenge internalized racism in Latina/o undergraduates. 相似文献