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怎样才能拥有更多的朋友?其实方法很简单,只要改变你的态度。你想有更多的朋友吗?通过改变对你所遇到的人的态度,你就能交上更多的朋友。 相似文献
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机械密封技术最新进展 总被引：1，自引：0，他引：1
对国内外机械密封新技术进行了较全面的阐述，从机械密封的结构、型式、种类、材料和测控技术等方面介绍机械密封的发展水平和新进展。 相似文献
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Blue jays (Cyanocitta cristata) responded to projected black-and-white silhouettes of cherry leaves that were either undamaged or were damaged by either cryptic caterpillars that disguise leaf damage due to their feeding or by noncryptic caterpillars that do not disguise leaf damage due to their feeding. Pecks to the key on which the images were projected were reinforced only if interresponse times fell within specified temporal boundaries. These boundaries were different in the presence of the two types of leaf damage. Following training with one exemplar of each damage type, the jays correctly categorized novel instances of both types. They categorized novel undamaged leaves as if they were examples of leaves showing damage by cryptic caterpillars. Results suggest that the jays can readily discriminate and generalize to new members of a polymorphous stimulus class. The results suggest that techniques for the study of concept formation in animals can be applied to an animal’s ability to categorize stimuli that are involved in a potential prey-predator relationship. 相似文献
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Cabello Valeria M. Real Constanza Impedovo Maria Antonietta 《Research in Science Education》2019,49(4):1087-1106
Constructing explanations of scientific concepts is one of the most frequent strategies used in the science classroom and is a high-leverage teaching practice. This study analysed the explanations provided by student teachers in STEM areas from a socio-materiality perspective focused on verbal and nonverbal language and representations. The study was conducted in a hybrid research format by scholars and a preservice teacher. First, the study compared the representational elements used by 86 student teachers to construct explanations about various concepts in a roleplay setting. Next, a positioning analysis was done by a preservice teacher, to a selection of five of these explanations focused on the concept of “force”. The positioning analysis highlighted the embedded voices in the construction of explanations, with a focus on the intersection between science and language. The results showed that the student teachers created explanations as static artefacts, mainly using examples, graphs and images to clarify the concepts. The voices of learners and scientists were mostly absent from the explanations, which led to the presentation of explanations in STEM areas as finished and unquestionable artefacts, with references neither to nature nor to the history of science. We reflect on the meanings attributed to learning to be a practitioner in the context of interconnecting science and language through explanations, as a process of meaning (re)production within the classroom. Implications for teacher education are discussed in order to enhance student teachers’ awareness about constructing knowledge by enacting explanations in the science classroom.
相似文献5.
Francis Lopez‐Real 《Assessment & Evaluation in Higher Education》1999,24(1):67-79
This paper discusses the problem of discriminating between individual contributions in the assessment of group projects. It is argued that peer assessment is a necessary element of any proposed structure but that the use of any ‘weighting‐factor’ system is contrary to the philosophy underpinning collaborative groupwork. A structure that separates the process and product elements of the assessment is described and a set of generic criteria for the process peer assessment identified. This structure was implemented with a group of students at Hong Kong University and evaluated using questionnaires and in‐depth interviews. The paper discusses the results of this evaluation and in particular identifies the need for ‘benchmarking’ when using the criteria and also the problematic nature of the ‘insider‐outsider’ syndrome as an important cultural factor. 相似文献
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Pigeons responded to changeover-key concurrent variable-interval variable-interval reinforcement schedules while there were intervals during which the changeover key was inoperative (no-choice intervals). In Experiment 1, a multiple schedule on the changeover key signaled choice and no-choice intervals. All subjects showed near-perfect discrimination during initial discrimination training and rapid reacquisition of discrimination following contingency reversals. In Experiment 2, the onset of no-choice intervals was unsignaled and contingent on interchangeover time. The temporal distribution of changeover-key responses conformed to the temporal distribution of choice intervals. The results of both experiments suggest that changeover responding is modifiable as a function of its immediate consequences. The results of Experiment 2, in particular, suggest that time or some correlate of time since the last changeover response can determine subsequent changeover behavior. 相似文献
7.
Richard Loth Michael Real R. Jackson T. McPhail James Startt William David Sloan 《Communication Booknotes Quarterly》2013,44(2):43-44
Communications Industry Report and Communications Industry Forecast (Veronis, Suhler & Associates, 350 Park Ave, New York, NY 10022—$500 each, paper, no ISBN numbers given) The Annual Report Glossary: 1988 Edition by Richard Loth (FIPS Partners, 4579 Airlie Way, Annandale, VA 22003—$26.00, three-ring notebook, ISBN 0-924399-00-7) Super Media: A Cultural Studies Approach by Michael Real (Newbury Park, CA: Sage, 1989—$35.00/16.95, ISBN 0-8039-3313-4 hard, 0-8039-3314-2 soft) The Olympic Movement and the Mass Media: Past, Present and Future Issues edited by R. Jackson and T. McPhail (Hurford Enterprises, PO Box 61256, 3630 Morley Trail NW, Calgary, Alberta T2L 1KS, Canada—price not given, paper, ISBN 0-88953-115-3) Historical Methods in Mass Communication by James Startt and William David Sloan (Hillsdale, NJ: Lawrence Erlbaum, 1989—$24.50, ISBN 0-8058-0433-1) Communication Research: Strategies and Sources by Rebecca Rubin, Alan Rubin and Linda Piele (Belmont, CA: Wadsworth, 1990—price not given, paper, ISBN 0-534-12144-6) “The Communication Series,” Mass Communication: An Introductory Survey by James Harless (Dubuque, IA: Wm. C. Brown, 1990) 相似文献
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XIEZongjie 《重庆大学学报(英文版)》2002,1(1):89-95
A review through the origination,development and prospect of Human resource accounting(HPA) is presented based on the study of plentiful literatures about if.HRA is defined as an accounting procedure and method to discriminate and meaure the data of human resources,aiming to provide information which is concerned with the change of human resources for the outside people to serve human resource management,It is experiencing a nearly frozen period following its hot time in 1970s after its origination in America in 1960s.The theoretic foundation of HRA is classical plutonomy dated back to 17th century,There were two preeminent persons in the higtory of HRA,One was Theodore Schultz who established his human capital theory relating education that improves the human capital value with economy;the other was Eric G.Flamholtz who enriched the concept,research methods and application of HRA,In China,the research on HRA started i 1980s beginning with introducing overseas achievements.Multiple views coexist i the academy on whether human resources should be taken as accounting assets and on where to put the HRA information in financial statements.The application of HRA is constrained by the absence of ull-blown theories and methodological systems about it as well as difficulties in evaluating human resources and the obstacle of conventional understandings,However,with the coming of intellective economy,the globalization of competition and the entry of China into WTO.The day of HRA will surely come. 相似文献
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孔煜 《重庆大学学报(英文版)》2005,(3)
1 Introduction 1 As the manifestation of corporate investment decision, corporate investment behavior has been the focus of scholars and practitioners’ discussion. At present, empirical studies about corporate investment mainly focus on two broad issues. One of the two issues is the relationship between financing constraints and investment-cash flow sensitivity in incomplete market. For example, Fazzari, Hubbard and Petersen [1] found that there is significantly positive relationship betwee… 相似文献