カンスウ ヒョウゲン ノ ヨウソウ ノ キジュツ ケンキュウ ２ ヒョウゲン セカイ ノ サイコウセイ モデル オ モチイテ

これまで筆者は、数学的知識の構成過程(数学化過程)に対する規範的モデルである表現世界の再構成モデルを設定(磯田 1984a,1993,1999b)し、その過程に基づく学習活動を学習指導過程において実現することを意図して、学習指導過程 ..

Pragmatic Awareness of Japanese EFL Learners in Relation to Individual Differences: A Cluster Analytic Approach

This study investigated the relationships between pragmatic awareness and learner types drawn from pro les of learners’ motivation and pro ciency, thus providing insight into the interplay of learner factors in contrast to previous studies describing the relationships between single variables. In addition to a modi ed replication of Bardovi-Harlig and Dörnyei’s (1998) study in the Japanese EFL context, this study incorporated measures of motivation based on Self-Determination Theory and learners’ pro ciency. Cluster analysis sorted 69 Japanese EFL learners into three distinct subgroups based on their con guration of motivation and pro ciency; in particular, they differed on their levels of intrinsic motivation and pro ciency. Their pragmatic awareness was later compared by use of one-way ANOVA. The results illustrated that two groups with more self-determined motivation showed sharper perception of pragmatic inappropriateness than the group with lower intrinsic motivation, even though its pro ciency was higher. Based on the “noticing hypothesis” (Schmidt, 1995), we propose that intrinsically motivated learners are likely to process L2 pragmatic input at the level of ‘understanding,’ whereas those with lower motivational pro les only ‘notice the form’ but do not process it at the ‘understanding’ level. Proficiency is not in itself a suffcient condition for enabling ‘understanding.

Jet array impingement flow distributions and heat transfer characteristics. Effects of initial crossflow and nonuniform array geometry

Two-dimensional arrays of circular air jets impinging on a heat transfer surface parallel to the jet orifice plate are considered. The jet flow, after impingement, is constrained to exit in a single direction along the channel formed by the jet orifice plate and the heat transfer surface. The configurations considered are intended to model those of interest in current and contemplated gas turbine airfoil midchord cooling applications. The effects of an initial crossflow which approaches the array through an upstream extension of the channel are considered. Flow distributions as well as heat transfer coefficients and adiabatic wall temperatures resolved to one streamwise hole spacing were measured as a function of the initial crossflow rate and temperature relative to the jet flow rate and temperature. Both Nusselt number profiles and dimensionless adiabatic wall temperature (effectiveness) profiles are presented and discussed. Special test results which show a significant reduction of jet orifice discharge coefficients owing to the effect of a confined crossflow are also presented, along with a flow distribution model which incorporates those effects. A nonuniform array flow distribution model is developed and validated

Giant nonlinear conduction and thyristor-like negative derivative resistance in BaIrO3 single crystals

We synthesized single-crystalline samples of monoclinic BaIrO3 using a molten flux method, and measured their magnetization, resistivity, Seebeck coefficient and nonlinear voltage-current characteristics. The magnetization rapidly increases below a ferromagnetic transition temperature TC of 180 K, where the resistivity concomitantly shows a hump-type anomaly, followed by a sharp increase below 30 K. The Seebeck coefficient suddenly increases below TC, and shows linear temperature dependence below 50 K. A most striking feature of this compound is that the anomalously giant nonlinear conduction is observed below 30 K, where a small current density of 20 A/cm2 dramatically suppresses the sharp increase in resistivity to induce a metallic conduction down to 4 K.Comment: 10 pages, 4 figures Submitted to Physical Review Letter