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1.In Spain there once lived a king and he was very fond of jokes.“I'll give a bag of gold,”he said,“to the person who can tell me the best story.There's only one rule:It must be a story which I can-not believe.If I can be lieve it,then I won't givea way the bag of gold.”ln2.Peoplecametothekingfromallpartsofthecountry.Theybroughtstrangeandwonderfulstories.Thekingsatinhispalaceandlistenedtoallthestories.Heenjoyedthemverymuch,buttoeachper-sonhesaid,“Icanbelievethatstory.Itcouldhappenandi… 相似文献
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A nonmetal transportation port with soft soil foundation of Tianjin New Harbor failed during construction in 1997. The soil properties and geological changes before and after landslide were investigated by in situ test means. The stability of the slope was estimated with several calculation methods, such as the simplified Bishop method and the non-circle analysis method. According to the investigation and analysis results, the factors that may cause the slope failure can be determined as follows： excessive excavating, violating the normal construction procedure, excessive pore water pressure during earlier piling and sudden water-level fluctuation in front of the slope. Measures to improve the soil foundation for reconstructing the port include strengthening the failed slope with vibro sand piles, filling up the crushed stone layer, dividing the excavation into four steps and driving piles by larger intervals. The port now has been successfully reconstructed and begun operation. 相似文献
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James Tooley 《牛津教育评论》2016,42(4):444-459
The affordability of private education is a contentious issue. While the extent of ‘low-cost’ private schooling is widely accepted, there is no agreement on what ‘low-cost’ means in this context and how this relates to affordability for poor families. This paper addresses the lacuna in the literature by defining ‘low-cost’ in relation to what poor families could afford if they were to send all their children to school while restricting their expenditure on schooling to a fixed proportion of their total family expenditure. This approach links the definition of ‘low-cost’ to internationally accepted poverty lines. Two examples from recent research in South Sudan and Liberia illustrate the flexibility of the new method. The paper also addresses the ‘conundrum’ in the research literature, which suggests low-cost private schools are unaffordable for poorest families, when the same literature typically shows some of the poorest using these schools. 相似文献
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ABSTRACTThe metaphor of the leaking pipeline is sometimes used to suggest that some students are lost for STEM as they advance through the educational system. This paper follows a cohort of upper-secondary school students with an interest in STEM from 18 months before their completion of upper-secondary until three years after their completion. Adopting a mixed-methods design, it follows the students' reflections and interests concerning their choice of higher education programme within and/or outside STEM. Only 22% of the students expressed the same interest during the whole period, and 56% changed between different groups of studies, e.g. between STEM and HEALTH. The students' trajectories showed that the leaking-pipeline metaphor is misleading because it suggests a linear and one-way movement, while there were students moving in as well as out of STEM trajectories. The students’ reflections showed identity issues at the level of ego identity, the personal identity and the social identity (Coté and Levine). Particular incidents in the students’ lives and in the outreach programme they were involved in sparked interests and reflections. These incidents should be considered as elements in a continuous reflection concerning who they are and where they would like to go rather than as critical moments. 相似文献
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《Journal of moral education》2012,41(1):56-66
Abstract One of the great teachers of our time was the French essayist and philosopher Emile Chartier, better known to countless thousands of devoted admirers simply as Alain. Following in the steps of La Chalotais, Rousseau, Jules Ferry, and Durkheim, Alain believed passionately in the importance of moral education as a fundamentally secular enterprise. We neglect it, he wrote, at our peril. In the introduction to this article an attempt is made to outline briefly some of the reasons for the remarkable influence which he had upon several generations of French men and women. In the second part I have attempted a critical assessment of his views on how morality should be approached in the atmosphere of a secular school. In particular, I have considered his views on the teaching of education for citizenship, social ethics, sociology, literature and good manners. Finally, I have sought to elicit from the study some of the most significant implications for the teaching of moral education in our own schools and have concluded with a plea that there be no doctrinaire limit set to the kinds of subject areas which could in theory illuminate the nature of morality and contribute to the formal teaching of moral education in the classroom. 相似文献
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INTRODUCTIONCiliaryneurotrophicfactor (CNTF)isanat urallyoccurringproteinwithamolecularmassofapproximately 2 2kDa .Itisexpressedinglialcellswithinthecentralandperipheralnervoussystems.CNTFstimulatesgeneexpression ,cellsurvivalordifferentiationinavarietyof… 相似文献
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Dynamic model and control strategy of parallel mechanism have always been a problem in robotics research. In this paper,different dynamics formulation methods are discussed first, A model of redundant driven parallel mechanism with a planar parallel manipulator is then constructed as an example. A nonlinear adaptive control method is introduced. Matrix pseudo-inversion is used to get a desired actuator torque from a desired end-effector coordinate while the feedback torque is directly calculated in the actuator space. This treatment avoids forward kinematics computation that is very difficult in a parallel mechanism. Experiments with PID together with the descibed adaptive control strategy were carried out for a planar parallel mechanism. The results show that the proposed adaptive controller outperforms conventional PID methods in tracking desired input at a high speed, 相似文献
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Starting with an elementary problem that appeared in the Putnam mathematics competition, we proceed to discuss some techniques of transcendental number theory and prove the following result. If p, q, r are distinct primes and if c is a real number with the property that pc, qc, rc are integers, then c must be a non-negative integer. The tools used are some linear algebra and complex analysis. The zero-density estimate method discussed here was used by Alan Baker to prove his celebrated theorem on linear forms in logarithms. The question as to whether we can replace three primes by two primes is an open question. 相似文献
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SAHOO Bikash SHARMA H.G. 《浙江大学学报(A卷英文版)》2007,8(5):766-771
Analysis is carried out to study the existence, uniqueness and behavior of exact solutions of the fourth order nonlinear coupled ordinary differential equations arising in the flow and heat transfer of a viscoelastic, electrically conducting fluid past a continuously stretching sheet. The ranges of the parametric values are obtained for which the system has a unique pair of solutions, a double pair of solutions and infinitely many solutions. 相似文献
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A new electromagnetic suspension model using a combination of high temperature superconductors (HTS) and copper conductors is proposed in this paper. A feasibility study showed that the magnets of our model can generate the 250 kg vertical suspension force. Three dimensional FEM and Design Sensitivity Analysis using the levitation gap length and cross sectional dimensions of the HTS magnets as design parameters were conducted to obtain the optimal shape of the cross section and the configuration of the HTS magnet. It was found that the gap length when optimized HTS magnet was used was much larger than that when copper conductor magnet was used, while the HTS coil volume was minimum, and the perpendicular field along the outer surface of the HTS coil was less than 0.12 T. 相似文献
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Kyeong Hah Roh 《Educational Studies in Mathematics》2008,69(3):217-233
There are many studies on the role of images in understanding the concept of limit. However, relatively few studies have been
conducted on how students’ understanding of the rigorous definition of limit is influenced by the images of limit that the
students have constructed through their previous learning. This study explored how calculus students’ images of the limit
of a sequence influence their understanding of definitions of the limit of a sequence. In a series of task-based interviews,
students evaluated the propriety of statements describing the convergence of sequences through a specially designed hands-on
activity, called the ɛ–strip activity. This paper illustrates how these students’ understanding of definitions of the limit of a sequence was influenced
by their images of limits as asymptotes, cluster points, or true limit points. The implications of this study for teaching
and learning the concept of limit, as well as on research in mathematics education, are also discussed. 相似文献
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Benjamin Triana 《Environmental Education Research》2016,22(2):248-270
This ethnography documents how the message of sustainability was interpreted and communicated through a sustainable agricultural (SAG) program at an American higher education institution. The ethnography documents the evolution of the program as the program tackled obstacles and accomplished its goals during the initial phases of the program’s development. A cultural communication framework is established in order to analyze the agitative, oppositional, intracommunal, and ritual communication utilized by the program’s members. The ethnography argues that the strategies and tactics employed by the SAG program alongside its curriculum and instruction are similar to the choices made by oppositional social movements. Findings reveal that when chosen and implemented intelligently, these strategies are as useful for a social movement within established academic institutions as they are for groups outside of them. The ethnography also highlights the importance of ritual communication as part of both education and social movement interactions. 相似文献
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This study introduces a pilot project—the creation of a Student and Family Office to reduce school violence—and suggests the benefits of the combined use of different strategies to decrease peer aggression and victimisation. The programme was implemented over a two-and-a-half-year period and included 132 Portuguese adolescents attending the third cycle of basic education. A considerable number of problematic situations, previously reported by students, changed after SFO intervention.. The results suggest that the local (universal and multimodal) intervention programme contributed to a decrease in harassment, coercion and aggressiveness, victimisation and reactive overt aggression rates, and also promoted the social and personal skills essential for successful interpersonal dynamics and peer conflict interventions. The implications for practice are discussed. 相似文献
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Eduardo Marti Merce Garcia-Mila Fernando Gabucio Katerina Konstantinidou 《European Journal of Psychology of Education - EJPE》2011,26(2):215-234
Tables are a presentation format that is commonly used to organize information, and they are widely present in many scenarios
of our students’ everyday activities; however, there is a scarcity of studies devoted to their analysis. Some of these studies
point out that the organization of data into a double-entry table presents difficulties for primary and secondary school students.
The present study analyzes the following: (1) the level of competency of primary and secondary school students in constructing
a double-entry table from a set of data and (2) the main difficulties encountered by these students during the task. Our findings
showed that the percentage of middle-school students who succeeded in contructing a conventional table was relatively low,
and the number did not significantly increase over four school years. A set of difficulties is identified and discussed in
terms of cognitive and graphical processes. 相似文献
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Autumn Tooms Cyprès 《School Leadership & Management》2014,34(4):352-371
This is a look at the political games within games that are enmeshed in a high-profile, heavily funded, politically charged collaborative focused on preparing new school leaders between a large prestigious university and a circle of school leaders and policymakers. This case specifically considers how power and money corrupt the original vision and mission of a collaborative, in terms of its consideration of school and its purpose in society. 相似文献
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金龙英 《读与写:教育教学刊》2008,5(3)
Anna Karenina(1828-77)by Leo Tolstoy(1828-1910)opens with the famous sentence:"Happy families are all lik,every unhappy family is unhappy in its own way". 相似文献