Hands-on Experience Programs in Science, Intended for Pupils from Elementary to Upper Secondary School

本稿は1995年から2004年まで、小・中学生および高校生を対象に実施してきた各種の科学実験体験活動の実践報告である。これらの体験活動は、岡山大学教育学部理科教育講座の教員とそれぞれの研究室に属する学部生・大学院生たちが実践してきたものである。活動の企画、教材開発、活動の運営、子どもたちに対する実験内容の説明から実験指導に至るまで、ほとんどを学生たちの自主性に任せた。教員は学生たちに対する支援に徹することを原則とした。これらの活動を通して得られた成果や、実践活動を行うに当たって、日頃の自然科学の探究活動の大切さについても触れる。This is a report of various educational practices in science from 1995 to 2004, designed for elementary school pupils and lower/upper secondary school students. These out-school activities were carried out by the teachers and their students of graduate and undergraduate courses who belong to the Department of Science Education, Faculty of Education, Okayama University. Almost everything was left up to the initiative and judgment of graduate/undergraduate students, such as planning and organizing the programs, developing do-it-yourself science materials, explaining to pupils what the experiment is like and how to conduct the experiment. As facilitators of the program, we supported activities of graduate/undergraduate students. The benefits of taking an active part in these programs, and the importance of hands-on learning activities in science are shown and emphasized in this paper

The New Type of Lectures on the Development of Science Teaching Plans and Materials Tried in the Department ofEducation

岡山大学教育学部の理科教育講座に所属する3年生を対象に,理科教材･授業案開発を指向した新しい講義を始めたのでその報告を行う｡本講義では,近隣の小,中学校や公民館,科学館等の協力も得て実践の場を確保し,開発した教材や授業案を実践することで生きた教材開発の訓練を行なうことを目指している｡教科内容学担当教員と教科教育学担当教員の協働を模索すると同時に,大学教員の教科内容の専門知識や技量を教材や授業案に有効に活用できる講義を意識した。This is a report of the new type of lectures on the development of teaching plans and teaching materials attempted in the science class for 3rd grade students in the Department of Education Okayama Universlty. The students practiced the development of teaching plans and teaching materials, and they conducted their activities not only at university but also at the neighboring schools, the public hall, the science museum etc. We expected the development of further collaboration in the academic staffs in the science education course, and the science abilities will be helpful for the development of teaching plans and teaching materials

Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). III. Discovery of a z = 4.72 Radio Galaxy with Lyman Break Technique

We report a discovery of $z = 4.72$ radio galaxy, HSC J083913.17+011308.1, by using the Lyman break technique with the Hyper Suprime-Cam Subaru Strategic Survey (HSC-SSP) catalog for VLA FIRST radio sources. The number of known high-$z$ radio galaxies (HzRGs) at $z > 3$ is quite small to constrain the evolution of HzRGs so far. The deep and wide-area optical survey by HSC-SSP enables us to apply the Lyman break technique to a large search for HzRGs. For an HzRG candidate among pre-selected $r$-band dropouts with a radio detection, a follow-up optical spectroscopy with GMOS/Gemini has been performed. The obtained spectrum presents a clear Ly$\alpha$ emission line redshifted to $z=4.72$. The SED fitting analysis with the rest-frame UV and optical photometries suggests the massive nature of this HzRG with $\log{M_*/M_{\odot}} = 11.4$. The small equivalent width of Ly$\alpha$ and the moderately red UV colors indicate its dusty host galaxy, implying a chemically evolved and dusty system. The radio spectral index does not meet a criterion for an ultra-steep spectrum: $\alpha^{325}_{1400}$ of $-1.1$ and $\alpha^{150}_{1400}$ of $-0.9$, demonstrating that the HSC-SSP survey compensates for a sub-population of HzRGs which are missed in surveys focusing on an ultra-steep spectral index.Comment: 10 pages, 5 figures, accepted for publication in A

The Weakness of the Internet Mail System and a Proposal of N ew Mail Transfer Agent

This paper presents a framework of implementing Mail Transfer Agent(MTA) for Small office/Home office and aims at the improvement of the security of e-mail server. We simplify the setting file of our MTA to reduce setting errors， because difficult settings cause setting errors and occur security holes. This MTA has limits relaying function of mails in order to prohibit SPAM mail relay. And we limit a size of received mail for the counter measures of mail bomb. Experimental results indicate that， this MTA has high security. And the MTA was evaluated that the settings of the MTA are very easy， and that this MTA is convenient in spite of the minimum functions

The Lectures on the Development of Teaching Plans and Teaching Materials Tried in the Science Education Class in Master's Course, Okayama University

岡山大学大学院教育学研究科の理科教育専攻の講義として、教材開発・授業案開発をテーマとした新しい講義を試みたのでその報告を行う。本講義は、理科教育講座に所属する大学院生、理科教育講座の大学教員、附属学校の理科関係の教諭が三者協働で進めることが特徴である。課題設定、教材開発を含めた実践準備および実践を院生チームを組み遂行させ、さらに経験や専門性の異なる人材と論議を重ねて活動を進めることを通じ、将来、協働で学校現場の課題提案・解決を行うことのできる能力を養うことを目標とした。This is a report of the new type of lectures on the development of teaching plans and teaching materials attempted in the science class in the Master's Course, Okayama University. The lectures were conducted in collaboration of the graduate students and the academic staffs in the science education course, and the science teachers of the attached school of Okayama University. The graduate students were grouped into two teams of five or six people, assigned to decide on themes, prepare and practice the development of teaching plans and teaching materials. They conducted their activities discussing problems with people of different experience and specialty, thus developing the ability to jointly propose and solve problems at schools in future

FaciaI Caricature Drawing System Based on a Fuzzy Linguistic Expression

In this paper， we discuss how to generate a facial caricature from a linguistic expression set which describes external and internal charaeteristics of a person, using linguistic information processing. For this purpose，a caricature drawing system which has twenty parameters is constructed. On the twenty dimensional parameter vector space called facial space， linguistic expressions are defined as fuzzy subsets. Linguistic combine operations are also defined as fuzzy set operations. We have shown examples of facial caricature and discussed effects of linguistic expressions