科克苏-穹库什太古生代构造-岩浆作用及其对西南天山造山时代的约束     

王博  舒良树Michel FAURE Dominique CLUZEL Jacques CHARVET 《中国科技期刊研究》2007,23(6):1354-1368

天山造山带是古生代多期碰撞增生作用的产物,其确切的造山时代是当前争议较多的热点问题.分布在西南天山的科克苏-穹库什太剖面经历了复杂的构造变形,最明显的两期变形事件分别为朝北的推覆作用和NE-SW韧性走滑作用.本剖面可分为伊犁岩浆岛弧、伊犁结晶基底、高压变质杂岩三个岩石-构造单元.野外可见黑云母花岗闪长岩侵入到绿片岩相变质岩中,岩脉切穿绿片岩中面理构造.通过锆石U-Pb LA-ICPMS测年,科克苏剖面钾长花岗岩的年龄为341±6Ma和338±8Ma,穹库什太黑云母花岗闪长岩的年龄为313±4Ma.其中,花岗闪长岩发生了黑云母定向排列,通过对黑云母进行^40 Ar/^39 Ar测年,获得坪年龄为263.4士0.6Ma,表明该花岗闪长岩受过后期热事件的干扰.地球化学分析表明,黑云母花岗闪长岩属于钙碱性系列,Nb和Ta含量低而Rb,Ba和TH含量很高,与俯冲作用有关的岛弧岩浆岩地球化学组成非常相似.结合前人对该地区高压变质岩、花岗岩和火山岩的研究成果,本文提出,西南天山俯冲-碰撞造山作用发生在晚石炭世之前,研究区后碰撞区域走滑作用标志着西南天山碰撞造山作用在二叠纪之前全部结束.  相似文献   

The development of inventive thinking skills in the upper secondary language classroom     

Alexander Sokol  David Oget  Michel Sonntag  Nikolai Khomenko 《Thinking Skills and Creativity》2008,3(1):34-46

The given paper presents the results of an empirical study into the efficacy of the Thinking Approach (TA) to language teaching and learning which is aimed at the development of students’ inventive thinking skills in the context of foreign language education, namely learning of English. The study was conducted among upper secondary students of two schools in Latvia and aimed to answer whether students working with the Thinking Approach demonstrate an increase in their inventive thinking skills. An inventive thinking test was employed as the research instrument. The results of the study suggest that students working with the TA demonstrate a significant increase in their inventive thinking skills in comparison with the control group (t = 3.32, p = 0.001). At the same time a number of limiting factors that appeared in the process of the study due to its naturalistic setting call for further research that could increase the reliability of the findings.  相似文献   

Three Generations of Complexity Theories: Nuances and ambiguities   总被引：1，自引：0，他引：1  

Michel  Alhadeff-Jones 《Educational Philosophy and Theory》2008,40(1):66-82

  相似文献   

Infants’ Preference for Social Interactions Increases from 7 to 13 Months of Age     

Maleen Thiele  Robert Hepach  Christine Michel  Daniel Haun 《Child development》2021,92(6):2577-2594

This study examined 7-to-13.5-month-old middle-class Western infants’ visual orienting to third-party interactions in parallel with their social attention behavior during own social interactions (Leipzig, Germany). In Experiment 1, 9.5- to-11-month-olds (n = 20) looked longer than 7- to-8.5-month-olds (n = 20) at videos showing two adults interacting with one another when simultaneously presented with a scene showing two adults acting individually. Moreover, older infants showed higher social engagement (including joint attention) during parent–infant free play. Experiment 2 replicated this age-related increase in both measures and showed that it follows continuous trajectories from 7 to 13.5 months (n = 50). This suggests that infants’ attentional orienting to others’ interactions coincides with parallel developments in their social attention behavior during own social interactions.  相似文献   

Favouring reflexivity in technology-enhanced learning systems: towards smart uses of traces     

Sébastien George  Christine Michel  Magali Ollagnier-Beldame 《Interactive Learning Environments》2016,24(7):1389-1407

During learning activities, reflexive processes allow learners to realise what they have done, understand why, decide on new actions and gain motivation. They help learners to regulate their actions by themselves, that is, to develop metacognitive regulation skills. Computer environments can support reflexive processes to support human learning, for example by analysing traces of learner activity and providing synthetic views by the way of indicators. Nevertheless, traces are underused in technology-enhanced learning (TEL) systems. In this article, we draw up the potential and limits of TEL systems based on traces for reflexive purposes. We then highlight the characteristics which TEL systems should have to use traces to foster reflexivity. We finally discuss how systems could enrich the self-confrontation process with traces.  相似文献   

Judgement and production of drawings by 3- to 10-year-olds: Comparison of declarative and procedural drawing knowledge     

Michel Fayol  Pierre Barrouillet  Chantal Chevrot 《European Journal of Psychology of Education - EJPE》1995,10(3):303-313

In this experiment, 80 children between the ages of three and ten produced and judged drawings of a person and a house. Two alternative hypotheses were tested. Under the first hypothesis, young children have internal models of persons and objects which are comparable to those of adults, but they have problems implementing their knowledge and planning and managing the graphic activity. If this hypothesis is true, we should obtain an interaction between age and type of task (production vs. judgement). Under the second hypothesis, children’s drawings are a direct reflection of their internal models of the items drawn. This hypothesis predicted a significant positive correlation between performance on production and judgement. In the judgement task, the subjects were presented with pairs of drawings and asked to indicate the more elaborate drawing. For the house and the man drawing, children by the age of three were able to correctly determine the most elaborated of the two presented drawings. A strong interaction was obtained between age and type of task (production or judgement), due to the fact that the difference between production performance and judgement performance decreases with age. The discussion suggests a limited cognitive capacity hypothesis to account for the results, and proposes some possibilities for future studies.  相似文献   

Evandro Agazzi on scientific objectivity     

Ghins  Michel 《Metascience》2016,25(1):151-157

  相似文献   

S’orienter dans un monde en mouvement     

Ricard  Michel 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》2019,65(4):659-661

International Review of Education -  相似文献   

The relation between syntactic awareness and contextual facilitation in word reading: What is the role of semantics?     

Catherine Mimeau  Annie Laroche  S. Hlne Deacon 《Journal of Research in Reading》2019,42(1):178-192

  相似文献   

Characterizing the mechanical parameters of forward and backward falls as experienced in snowboarding     

Kai-Uwe Schmitt  Diana Wider  Frank I. Michel  Othmar Brügger  Hans Gerber  Jachen Denoth 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(1):57-72

Wrist injuries are frequently observed after falls in snowboarding. In this study, laboratory experiments mimicking forward and backward falls were analysed. In six different falling scenarios, participants self-initiated falls from a static initial position. Eighteen volunteers conducted a total of 741 trials. Measurements were taken for basic parameters describing the kinematics as well as the biomechanical loading during impact, such as impact force, impact acceleration, and velocity. The effective mass affecting the wrist in a fall also was determined. The elbow angle at impact showed a more extended arm in backward falls compared to forward falls, whereas the wrist angle at impact remained similar in forward and backward falls. The study results suggest a new performance standard for wrist guards, indicating the following parameters to characterize an impact: an effective mass acting on one wrist of 3–5 kg, an impact angle of 75° of the forearm relative to the ground, and an impact velocity of 3 m/s.  相似文献