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171.
Brenda Dervin Melvin J. Voight Michael J. Baker Robert Downs Ralph McCoy David Altheide 《Communication Booknotes Quarterly》2013,44(3):31-32
PROGRESS IN COMMUNICATION SCIENCES, VOLUME V edited by Brenda Dervin and Melvin J. Voight (Norwood, N.J.: Ablex 1984---$39.50) MACMILLAN DICTIONARY OF MARKETING & ADVERTISING edited by Michael J. Baker (New York: Nichols Publishing, 1984---$4.50) THE FIRST FREEDOM TODAY: CRITICAL ISSUES RELATING TO CENSORSHIP AND TO INTELLECTUAL FREEDOM edited by Robert Downs and Ralph McCoy (Chicago: American Library Association, 1984---$40.00) MEDIA POWER by David Altheide (Beverly Hills, Ca.: Sage Publications, 1985---$28.00/14.00) CURRENT ISSUES AND RESEARCH IN ADVERTISING 1984 edited by James Leigh and Claude Martin, Jr. (Ann Arbor: University of Michigan, 1984---$15.00) THE COPYRIGHT BOOK; A PRACTICAL GUIDE by William Strong (Cambridge, Mass.: MIT Press, 1984---$13.95) 相似文献
172.
Structural equation modeling: Back to basics 总被引:1,自引:0,他引:1
Ralph O. Mueller 《Structural equation modeling》2013,20(4):353-369
Major technological advances incorporated into structural equation modeling (SEM) computer programs now make it possible for practitioners who are basically unfamiliar with the purposes and limitations of SEM to use this tool within their research contexts. The current move by program developers to market more user friendly software packages is a welcomed trend in the social and behavioral science research community. The quest to simplify the data analysis step in the research process has—at least with regard to SEM—created a situation that allows practitioners to apply SEM but forgetting, knowingly ignoring, or most dangerously, being ignorant of some basic philosophical and statistical issues that must be addressed before sound SEM analyses should be conducted. This article focuses on some of the almost forgotten topics taken here from each step in the SEM process: model conceptualization, identification and parameter estimation, and data‐model fit assessment and model modification. The main objective is to raise awareness among researchers new to SEM of a few basic but key philosophical and statistical issues. These should be addressed before launching into any one of the new generation of SEM software packages and being led astray by the seemingly irresistible temptation to prematurely start “playing” with the data. 相似文献
173.
Ralph Mario Wirth Raymond V. Padilla 《Community College Journal of Research & Practice》2013,37(9):688-711
This qualitative study highlighted student perspectives on barriers to success at a community college located in a south Texas city. The study examined barriers to student success, the knowledge that successful students possess to overcome the barriers, and the actions that successful students undertake to overcome the barriers. Padilla's (2004) theoretical framework and methods for modeling student success provided the conceptual framework for the study. The data analysis resulted in the development of a local student success model and an implementation model for student services at the subject campus. 相似文献
174.
175.
W. Ralph Mccaw 《Journal of Experimental Education》2013,81(4):50-52
The paper-and-pencil 50-item elementary school form of the dogmatism scale was shortened by use of the item statistics x50 and ß to produce a 20-item instrument with a test characteristic curve designed to maximally spread respondents around the midpoint of the score range. Reliability coefficients for selected sub-sample responses to the modified instrument by school-aged adolescents range from .81 to .77 with a coefficient of . 78 being reported for the general sample (N = 1, 284). 相似文献
176.
Ralph E. Heiges 《Peabody Journal of Education》2013,88(1):6-8
This article argues for the need to differentiate between professional and support careers in fields of science, technology, engineering, mathematics, and medicine (STEMM). Using data from the Longitudinal Study of American Youth (LSAY), the article identifies important differences in the nature of the work and responsibility that differentiate the scientific workforce into a professional component and a support component. Further analysis demonstrates that the kind of training and education needed for STEMM support occupations is generally lower and different than the education needed for entrance into a STEMM profession. The LSAY data indicate that the students planning to enter a STEMM profession tend to make their choice earlier, select appropriate courses and programs to obtain professional credentials, and make a substantially longer commitment to educational preparation than do young adults who enter STEMM support occupations. We suggest some policy implications that may flow from this distinction. 相似文献
177.
Ralph H. Thompson 《Peabody Journal of Education》2013,88(5):310-314
Creative Bookbinding. Pauline Johnson. (Seattle: University of Washington Press, 1963. Pp. 263. $9.50.) The Curriculum of the Elementary School. George A. Beauchamp. (Boston: Allyn and Bacon, 1964. Pp. 381. $7.50.) The Elementary School Teacher. Dorothy G. Peterson. (New York: Appleton‐Century‐Crofts, 1964. Pp. 570. $6.50.) Jullien's Plan for Comparative Education. Comparative Education Studies. Stewart Fraser. (New York: Bureau of Publications, Teachers College, Columbia University, 1964. Pp. 147. $3.50.) State Politics and the Public Schools: An Exploratory Analysis. Nicholas A. Masters, Robert H. Salisbury, and Thomas H. Eliot. (New York: Alfred A. Knopf, 1964. Pp. 319. $6.95.) Student Teaching: Cases and Comments. Elizabeth Hunter and Edmund Amidon. (New York: Holt, Rinehart, and Winston, 1964. Pp. 158. $1.95.) Teaching and Learning in Adult Education. Harry L. Miller. (New York: Macmillan, 1964. Pp. 340. $6.50.) Teaching Science in Today's Secondary Schools. Walter A. Thurber and Alfred T. Collette. (Boston: Allyn and Bacon, 1964. Pp. 640. $8.50.) 相似文献
178.
Recently, scholars have suggested that biological factors, such as temperament, influence human social behavior, particularly in the formation of traits, such as communication apprehension. Despite progress in this area, the relationship between temperament and states, such as speech anxiety, remains unclear. Theories of temperament predict that the rate at which subjects habituate to stress varies inversely with the degree to which they are sensitized during initial confrontation with stress‐producing stimuli. The inverse relationship between habituation and sensitization, in the context of public speaking state anxiety, is examined in this report. In two separate studies, using both physiological and psychological measures of state anxiety, the inverse relationship between sensitization and habituation was confirmed. Specifically, sensitization accounted for 69.1% and 50.3% of the variance in physiological and psychological habituation, respectively. 相似文献
179.
Gea O. F. Parikesit Jeffrey S. Guasto Salvatore Girardo Elisa Mele Ripalta Stabile Dario Pisignano Ralph Lindken Jerry Westerweel 《Biomicrofluidics》2009,3(4)
Nanoparticle image velocimetry (nano-PIV), based on total internal reflection fluorescent microscopy, is very useful to investigate fluid flows within ∼100 nm from a surface; but so far it has only been applied to flow over smooth surfaces. Here we show that it can also be applied to flow over a topologically structured surface, provided that the surface structures can be carefully configured not to disrupt the evanescent-wave illumination. We apply nano-PIV to quantify the flow velocity distribution over a polydimethylsiloxane surface, with a periodic gratinglike structure (with 215 nm height and 2 μm period) fabricated using our customized multilevel lithography method. The measured tracer displacement data are in good agreement with the computed theoretical values. These results demonstrate new possibilities to study the interactions between fluid flow and topologically structured surfaces. 相似文献
180.
Daniel Paech Kerstin Klopries Ralph Nawrotzki Heinz-Peter Schlemmer Frederik L. Giesel Joachim Kirsch Jobst-Hendrik Schultz Thomas Kuner Sara Doll 《Anatomical sciences education》2022,15(1):143-154
Cadaver-specific postmortem computed tomography (PMCT) has become an integral part in anatomy teaching at several universities. Recently, the feasibility of contrast-enhanced (CE)-PMCT has been demonstrated. The purpose of this study was to identify particular strengths and weaknesses of both non-enhanced and contrast-enhanced PMCT compared to conventional cadaver dissection. First, the students’ perception of the learning effectiveness of the three different modalities have been assessed using a 34-item survey (five-point Likert scale) covering all anatomy course modules. Results were compared using the nonparametric Friedman Test. Second, the most frequent artifacts in cadaver CT scans, were systematically analyzed in 122 PMCT and 31 CE-PMCT data sets to quantify method-related limitations and characteristics. Perfusion quality was assessed in 57 vascular segments (38 arterial and 19 venous). The survey was answered by n = 257/320 (80.3%) students. Increased learning benefits of PMCT/ CE-PMCT compared to cadaver dissection were found in osteology (2/3 categories, P < 0.001), head and neck (2/5 categories, P < 0.01), and brain anatomy (3/3 categories, P < 0.01). Contrast-enhanced-PMCT was perceived particularly useful in learning vascular anatomy (10/10 categories, P < 0.01). Cadaver dissection received significantly higher scores compared to PMCT and CE-PMCT in all categories of the abdomen and thorax (7/7 categories, P < 0.001), as well as the majority of muscular anatomy (5/6 categories, P < 0.001). Frequent postmortem artifacts (total n = 28, native-phase n = 21, contrast injection-related n = 7) were identified and assessed. The results of this work contribute to the understanding of the value of integrating cadaver-specific PMCT in anatomy teaching. 相似文献