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No bulk metallic glass (BMG) has been observed so far in the Ti–Cu binary system. It has been found that by choosing a pseudo-binary eutectic (L?→?TiCu +TiNi) deeper than that in the binary, reachable via only small substitution of Cu with Ni, the glass-forming ability can be effectively elevated. BMGs of 1–1.5 mm diameter have been formed over a composition range around Ti50Cu43Ni7. The new BMGs are reproducibly malleable with significant compressive plastic strains. 相似文献
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Christopher Evan Franklin 《Philosophical Studies》2011,156(2):199-230
In this paper I seek to defend libertarianism about free will and moral responsibility against two well-known arguments: the
luck argument and the Mind argument. Both of these arguments purport to show that indeterminism is incompatible with the degree of control necessary
for free will and moral responsibility. I begin the discussion by elaborating these arguments, clarifying important features
of my preferred version of libertarianism—features that will be central to an adequate response to the arguments—and showing
why a strategy of reconciliation (often referred to as “deliberative libertarianism”) will not work. I then consider four
formulations of the luck argument and find them all wanting. This discussion will place us in a favorable position to understand
why the Mind argument also fails. 相似文献
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Can learners accurately judge the rate of their learning? Rates of learning may be informative when study time is allocated across materials, and students' judgments of their learning rate have been proposed as a possible metacognitive tool. Participants estimated how much they improved between presentations in multitrial learning situations in which n-gram paragraphs (in Experiments 1 and 2) or word pairs (Experiments 3 and 4) were learned . In the first experiment, participants rated improvement on a percentage scale, whereas on the second and third, judgments were given on a 0–6 scale. Experiment 4 used both a percentage scale and an absolute number scale. The main result was that judgments of improvement were poorly correlated with actual improvement and, in one case, were negatively correlated. Although judgments of improvement were correlated with changes in judgments of learning, they were not reliable indicators of actual improvement. Implications are discussed for theoretical work on metacognition. 相似文献
229.
Knäuper B McCollam A Rosen-Brown A Lacaille J Kelso E Roseman M 《Psychology & health》2011,26(5):601-617
Forming implementation intentions ('If I encounter situation X, then I will perform behaviour Y!') increases the probability of carrying out goals. This study tested the hypothesis that mental imagery targeting key elements of implementation intentions further increases goal achievement. The residents of a student residence were assigned the goal of consuming extra portions of fruit every day for 7 days and randomly assigned to one of four conditions: control (active rehearsal), implementation intentions, goal intention mental imagery or mental imagery targeted to the implementation intentions. Among low fruit consumers, but not high fruit consumers, fruit consumption at follow-up was higher in the targeted mental imagery group than in the other group, with the lowest fruit consumption in the control group. The findings suggest that it may be beneficial to use targeted mental imagery when forming implementation intentions. 相似文献
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