イメージプロセッシングを用いた鳥の歌の音素抽出に関する研究

電気通信大学200

情報科学の観点からの鳥の歌解析

電気通信大学201

情報科学の観点からの鳥の歌解析

Songbirds have been actively studied for their complex brain mechanism of sensor-motor integration during song learning. In general, birdsong which is string of sounds is represented by a sequence of letters called song notes. Our subject bird Bengalese finch (Lonchura stri-ata var. domestica) has been widely studied for its unique song features similar to human language. Male Bengalese finches learn singing by imitating external models to produce songs. For computational analysis the songs must be represented in songnote sequences. An automated approach for this purpose is highly desired since manual processing makes human annotation cumbersome, and human annotation is very heuristic and easily lacks objectivity. In our research, we propose a new approach for automatic detection and recognition of the songnote sequences via image processing. The proposed method is based on human recognition process to visually identify the patterns in a sonogram image. The songnotes of the Bengalese finch are dependent on the birds and similar pattern does not exist in two different birds. Considering this constraint, our experiments on real birdsong data of different Bengalese finch show high accuracy rates for automatic detection and recognition of the songnotes. These results indicate that the proposed approach is feasible and generalized for any Bengalese finch songs. Furthermore, in our study, we focus on information-theoretic analysis of these sequential data to explore the complexity and diversity of birdsong, and learning process throughout song development. We design and develop the analysis tool which has many features to do analysis for the sequential data. For experiment, we employ thirteen male Bengalese finches, each with different bouts of song data. By applying ethological data mining to these data, we discover that the finches follow two types of song learning mechanism: practice mode and adopt mode. In addition, over the analysis we find that it is possible to visualize the song features, e.g. traditional transmission, by contour surface diagram of the transition matrix. Furthermore, we can easily identify the families from these contour surface diagrams, which is a very challenging task in general. Our obtained results indicate that analysis based on data mining is a versatile technique to explore new aspects related to behavioral science.電気通信大学201

Acoustic Analysis of Bengaless Finches Song: An Image Processing Approach to Extract the Song Notes

200

Effects of Autonomy in an English Language Learning Class

Autonomy in language learning in one form or another has established itself as an importantfactor in student achievement and performance. This paper examines some of the effects of variousaspects of autonomy that were implemented with 27 first-year university students attending anelective English course to encourage their educational growth and development in Englishlanguage skills. At the end of the semester, the students participated in a general survey whichrated their opinions on several aspects of the class. Parts of this survey which relate to the use ofautonomy in class will be discussed in this paper. The authors also share observations citingspecific cases where giving the students a certain amount of freedom resulted in outstandingperformance on the final project of the course, an approximate 5-minute presentation in English.Both the results of the survey and the author observations support the notion that giving studentssome amount of freedom fostered autonomy, and is beneficial in a language learning context

言語自習室の機器を活用した英語教育の実践報告

The present report is on two kinds of practice of English education for enhancing presentation skills, using the equipment in the Language Self-Study Room (LSSR): (1) practice in some classes for undergraduate and graduate courses (2) the summer seminar, from August 11 to 13, 2010, for students and staffWhat is common in both activities is that: (3) Participants chose the topic for presentation, read relevant articles, wrote an essay and made Power Point presentation. In order to improve their presentation skills, the participants practiced pronunciation using a computer-assisted material in the LSSR. (4) The presentations were video-taped and used for giving appropriate advice for improvement.The participants utilized materials in the LSSR mainly in two ways: (5) They repeatedly practiced English pronunciation and rhythm using PC@LL, a pronunciation practice software. (6) They checked their video-taped presentation and refined the presentation skills. Through the practice, the participants improved their presentation skills and learned the importance of self-study. The mission of the LSSR is to provide the environment in which ambitious students and staff in UEC TOKYO will be able to fully develop themselves in their English abilities so that they will contribute fully in their own way. The authors realized the need of efforts to make the LSSR used more