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空間を伝播する可聴帯域に限る音響信号によってディジタル情報を伝送する技術として、音響情報秘匿技術と音響モデム技術、それらを合わせたハイブリッド技術を、空間伝搬音響情報伝送（aerial acoustic data transmission）技術として概観する。これまで、空間伝搬に用いる情報秘匿や符号化の手法の開発は行われてきたが、空間伝搬を前提とした技術の評価は定量的に行われてきていなかった。それらの技術を、アナウンス音声で伝送したい内容を符号化して音響信号へ秘匿することで、言語あるいは音声バリアフリー利用する事例を挙げ、その際の技術の要求と評価方法について検討する。そして、特に長距離伝搬が必要な防災無線放送に伴う各種妨害要因を検討し、それらを模擬するシミュレーション実験環境において、従来から提案していた両側エコー拡散法の改善手法によってアナウンス音声へ情報秘匿した場合の性能を、秘匿ビット値と検出ビット値とのビットエラー率によって評価し、その有効性を確認した。, Technologies for transmitting digital information using an aerial acoustic signal limited to anaudible band are reviewed as a part of the aerial acoustic data transmission technology. They include anacoustic information hiding method, an acoustic modem, and a hybrid technique combining them. Althoughseveral technologies for aerial data transmission were developed, these technologies have not been evaluatedquantitatively. Application of these technologies for languages and/or barrier-free speech by embedding the encoded data of the announcement to be transmitted into the audio signal and their proper evaluation method are proposed. The improved bilateral time-spread echo hiding method applied to the speech signals of an announcement is evaluated using the proposed computer simulation. The simulation considers various factors of disturbances induced by long-distance propagation, assuming the use of a voice evacuation and mass notification system. The results of the computer simulation show that the bit error rates between the embedded and the extracted information bits are satisfactory for applications for long-distance propagation.

プログラミング教育が小学校で2020年から導入される中、思考力・判断力・表現力としての「プログラミング的思考」の育成が重視され、プログラミング教育ができる教員が求められている。そこで本研究では、教科「情報」の免許取得を目指す教職課程の学生が、プログラミングの知識や基本操作を身に付けてからプログラミングの授業の学習指導案を作成して授業を行うといった高校との連携による教育体制を設定し、①学生に対する教育効果、②教育体制の在り方について検討した。その結果、学内外の専門の教員と連携して行う一連の教育体制は、プログラミングの知識の獲得、学習指導案の作成といった授業設計に関する課題意識の深化、教育実習に向けた学びの意欲の向上に教育効果が見られ、学内外の教員と連携して行う教育体制は、意義が高いことが示唆された。, In this paper, we report on a practical teaching program for undergraduate students enrolled in the certified teacher training course, in which the students prepare the contents and teach computer programming during information science classes at local high schools. In particular, we examined 1） the educational effect of the program for the undergraduate students, and 2） the requirements of the educational system to support this program. We found that the proposed practical teaching program had positive effects on the undergraduate students, in that it improved programming teaching skills, deepened the understanding for the necessity of coursework preparation, and increased motivation towards further practical teaching programs. We conclude that the proposed practical teaching program including teachers from both university and high school is beneficial for students in the teacher training course.

特集 : 日本宗教史像の再構築 --トランスナショナルヒストリーを中心として-- ≪第I部 :帝国日本と民間信仰≫

短期大学家政学科開講科目である「食品微生物学実習」の教育自標は、食生活における微生物制御と利用ができるようになることであり、そのために、微生物の取り扱いの基本を学び,食品の細菌検査や発酵食品の試験製造を行う内容となっている。限られた実験設備で、理科系科目の学習履歴の少ない者を対象として、発酵食品の製造原理をできるだけ科学的にとらえつつ、その魅力を伝えることをねらった。

The effects of infection with parasitic copepods Haemobaphes diceraus and Clavell perfida on the growth and maturity of walleye pollock Theragra Thalcogramma off the coast of eastern Hokkaido, Japan were examined in the feeding season and spawning season. In the feeding season, the condition factor (KF) and hepatic somatic index (HSI) of walleye pollock decreased as the number of H. diceraus increased, but were not related to the number of C. perfida. In the spawning season, the KF, HSI, and gonadic somatic index (GSI) of both sexes of fish decreased as the number of H. diceraus increased. Reproductively spent fish were more often infected with H. diceraus than those of other maturity levels were. No atretic oocytes were detected in the gonads infected with H. diceraus. Histological observation of fish gonads suggests that H. diceraus infection may cause spawning to occur earlier or to be suspended. The lengths of fish at age did not differ between individuals infected with H. diceraus and uninfected ones. The infection rate of H. diceraus increased steadily with age, but no more than three H. dicer aus per host were observed. We conclude that H. diceraus infection significantly influences the reproduction of walleye pollock through the nutritional condition.

In 1883 or 84 the Area of tenant farms and of non—tenant farms by districts and cities began to be registered in "the Prefectural Books of Statistics." This registration of the Area continued untill 1940's. We can calculate according to these statistics the percentage of tenant farms, through which we can get the idea how "the Land Ownership" developed. This paper aims at presenting the fundamental date toward the study of the Japanese Land Owner System. Our procedures were: (1) to tabulate the percentage of tenant farms by districts and cities all over the country from 1883 • 84 to 1940's; (2) to indicate the percentage of tenant farms by formersystem districts in sub—tables; and, based on these tables, (3) to clarify and analyse the fluctuations of the percentage of tenant farms and the Regional features of it.