著者
水本 篤 MIZUMOTO Atsushi 竹内 理 TAKEUCHI Osamu
出版者
関西英語教育学会紀要
巻号頁・発行日
2008-03-21

Reporting effect sizes is now mandatory when submitting research papers to professional journals in our field. In this paper, therefore, we introduce and discuss the fundamental concepts and some considerations of the effect sizes in EFL research in Japan.
著者
Ishida Masahiko Takeuchi Osamu Mori Takehiko Shigekawa Hidemi
出版者
American Physical Society
雑誌
Physical review B (ISSN:01631829)
巻号頁・発行日
vol.64, no.15, pp.153405, 2001-09
被引用文献数
7 10

In addition to the intermolecular symmetry breaking which is generally observed during the surface relaxation/reconstruction of atomic crystals, intramolecular relaxation is expected to exist in the case of molecular crystals, which was confirmed on the surface of β-(BEDT-TTF)2PF6 [BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene] by using scanning tunneling microscopy (STM). Two types of molecular images obtained by STM were comprehensively explained by the spatial distributions of the highest-occupied molecular orbital calculated for the two types of the molecular structures. One is the structure appearing in the crystal that is derived from the x-ray diffraction measurement, which was used in the previous calculations to reproduce the STM images. The other is the relaxed molecular structure calculated by optimization of the molecular structure.
著者
SUMI Seijiro TAKEUCHI Osamu
出版者
CALICO
雑誌
Design-based research in CALL
巻号頁・発行日
vol.10, pp.157-182, 2013-07

The purposes of this paper are to (a) elaborate on the Cyclic Model of Learning(CML; Takeuchi, 2007), which was formed based on the four phases of the design-based research (DBR) framework (Amiel & Reeves, 2008); (b) to put the model into practice through use of technology in the field of EFL teaching; and (c) to examine how the CML-based teaching practice influences students’English ability and the instructor’s teaching methods. Based on the four phasesof the DBR framework, a qualitative investigation was conducted to identify the problems that impede teachers’ use of technology in EFL teaching (Sumi, 2011). To ameliorate the problems, following the second phase of the DBR framework, the CML was created and applied to a research project. The most distinctive feature of the CML is its integration of in-class practices with students’ out-of-class self-learning with aid of CALL technology. The CML was put into practice and tested on 19 first-year undergraduate students of EFL over the course of one year at a university in Japan. Data were collected, both on- and off-line, in a variety of ways including quizzes, weblog, video recording, questionnaires, and classroom observation. Findings confirmed that CML-based teaching practice contributedto the improvement of both students’ English abilities and the instructor’s teaching methods.
著者
竹内 理 TAKEUCHI Osamu
出版者
日本私立大学連盟
巻号頁・発行日
1996-05-20
著者
水本 篤 MIZUMOTO Atsushi 竹内 理 TAKEUCHI Osamu
出版者
関西英語教育学会紀要
巻号頁・発行日
2008-03-21

Reporting effect sizes is now mandatory when submitting research papers to professional journals in our field. In this paper, therefore, we introduce and discuss the fundamental concepts and some considerations of the effect sizes in EFL research in Japan.
著者
MIZUMOTO Atsushi TAKEUCHI Osamu
出版者
外国語教育メディア学会 関西支部メソドロジー研究部会
雑誌
2010年度部会報告論集「より良い外国語教育のための方法」
巻号頁・発行日
pp.47-73, 2011-06-06

統計的検定は,標本から得たデータ分析結果を母集団にまで一般化させる目的で行われる。統計的検定では,サンプル・サイズ,有意水準,効果量,検定力の4つが検定結果の良し悪しを決定する重要な要素であるため,その基礎的概念の理解が検定を正しく使うためには重要である。そこで,本稿では,効果量と検定力分析の2つの概説を行い,統計的検定を用いている研究において,効果量報告と検定力分析の使用を推奨することを目的とする。
著者
YOSHIDA Haruyo UEMATSU Shingo YOSHIDA Shinsuke 吉田 信介 TAKEUCHI Osamu 竹内 理
出版者
外国語教育メディア学会(旧Language Laboratory Association)
巻号頁・発行日
1998

本論文は、(1)映像と英語音声+日本語字幕、(2)映像と英語音声+英語字幕、(3)映像と日本語音声+英語字幕の三つの異なる音声と字幕のコンビネーションが、言語獲得の前提となる内容理解にどのように影響するかを実証的に考察したものである。被験者は、日本人中級英語学習者156名で、英語聴解力テストにより3つの等質なグループに分けられた。このそれぞれのグループに、上記の3条件で題材を提示し、その内容理解を調べた。題材にはアメリカ映画の一部を利用した。その結果、(2)→(1)→(3)の順に内容理解が高いことがわかった。この結果を被験者のアンケートなどから得られた結果と総合すると、中級学習者にとっては、多様な情報源(映像、音声、文字)を利用することが困難であり、特に情報が外国語で提示された場合には、外国語字幕→外国語音声の順で困難さが増すことがわかった。本論文では、この結果に基づき、効果的な音声と字幕のコンビネーションの在り方、今後の研究の方向性などについても言及していく。
著者
Kanazawa Ken Taninaka Atsushi Takeuchi Osamu Shigekawa Hidemi
出版者
American Physical Society
雑誌
Physical review letters (ISSN:00319007)
巻号頁・発行日
vol.99, no.21, pp.216102, 2007-11
被引用文献数
12 13

The structures of two competing phases and their interrelationship in the self-organization of glycine molecules on a Cu(100) surface were clarified. Despite their similar structural energies predicted using first-principles calculation, completely different mechanisms were found to stabilize the two phases. The balance and coordination of the two mechanisms that induce a variety of self-assembled structures in this attractive system were revealed. Furthermore, the importance of the microscopic arrangement of the molecules in designing the macroscopic electronic structures was directly demonstrated.
著者
Terada Yasuhiko Yoshida Shoji Takeuchi Osamu Shigekawa Hidemi
出版者
IOP Publishing
雑誌
Journal of physics. Condensed matter (ISSN:09538984)
巻号頁・発行日
vol.22, no.26, pp.264008, 2010-07
被引用文献数
15 25

The development of time-resolved scanning tunnelling microscopy (STM), in particular, attempts to combine STM with ultrafast laser technology, is reviewed with emphasis on observed physical quantities and spatiotemporal resolution. Ultrashort optical pulse technology has allowed us to observe transient phenomena in the femtosecond range, which, however, has the drawback of a relatively low spatial resolution due to the electromagnetic wavelength used. In contrast, STM and its related techniques, although the time resolution is limited by the circuit bandwidth (~100 kHz), enable us to observe structures at the atomic level in real space. Our purpose has been to combine these two techniques to achieve a new technology that satisfies the requirements for exploring the ultrafast transient dynamics of the local quantum functions in organized small structures, which will advance the pursuit of future nanoscale scientific research in terms of the ultimate temporal and spatial resolutions.
著者
Yamamoto Kazuyo Takeuchi Osamu Zennyuu Kanji Fukui Masaki Suzuki Koichiro Hatsuoka Yoshinori Shiraishi Mitsuru
出版者
大阪歯科学会
雑誌
Journal of Osaka Dental University (ISSN:04752058)
巻号頁・発行日
vol.40, no.1, pp.37-42, 2006

We did an in vitro study on the bonding durability both to enamel and dentin of three fluoride-releasing enamel/dentin adhesive systems: experimental ABF and Imperva Fluorobond which are 2-step (self-etching primer+adhesive) systems, and Reactmer which is a 1-step (self-etching-priming-adhesive) system. The tensile bond strength was determined after 1 day and 1 year in 37℃ water. ABF showed high bond strength to enamel and dentin after 1 day. Although the bond strength to enamel was significantly degraded after 1 year, fractures were almost all cohesive failures in the bonding resin. Therefore, TBS values seemed to reflect the tensile strength of the bonding resin; the actual bond strength at the interface was probably greater than the values obtained from the tensile bond strength tests. Although Fluorobond had dentin bonding durability similar to ABF, its bond strength to enamel was inferior. Adhesive failures were mainly observed with enamel, indicating that the bonding durability to enamel was insufficient. In Reactmer, bond strengths both to enamel and dentin were significantly reduced after 1 year in water. The fractured surfaces were cohesive failures in the bonding resin for all specimens. These findings suggest that the bonding of ABF and Fluorobond to enamel and dentin was generally durable. The bond strength of Reactmer was less durable than the other two systems because of the fragile bonding resin.