Visual Tracking Method of a Quick and Anomalously Moving Badminton Shuttlecock

This paper introduces a method that uses multiple-view videos to estimate the 3D position of a badminton shuttle that moves quickly and anomalously. When an object moves quickly, it is observed with a motion blur effect. By utilizing the information provided by the shape of the motion blur region, we propose a visual tracking method for objects that have an erratic and drastically changing moving speed. When the speed increases tremendously, we propose another method, which applies the shape-from-silhouette technique, to estimate the 3D position of a moving shuttlecock using unsynchronized multiple-view videos. We confirmed the effectiveness of our proposed technique using video sequences and a CG simulation image set

Improvement of Badminton-Player Tracking Applying Image Pixel Compensation

Motion analysis of athletes often provides important information to improve training and strategy meetings. Visual player-tracking techniques are being developed that do not need devices. In this paper, we focus on racket sports, since they suffer from technical issues for visual tracking such as small observation size (low resolution) and large variation of player appearances. Moreover, racket sports video is usually captured by a monocular camera at a set position so that each player is observed at a top and a bottom region of the video across a net on the court. As a result, tracking accuracy is damaged by the net that often occludes players on the far side. As a solution, this paper proposes a method to improve the player-tracking accuracy in badminton video by applying an image pixel compensation technique, such as Image Inpainting. We confirm the effectiveness of our method using videos of badminton singles games

[Report on Investigation and Research Activity] Nuclear Genome Analysis of Human Skeletons Excavated from Otubo Shell Mound in the End of Late Yayoi, Uki-city, Kumamoto Pref.

departmental bulletin pape

Terrestrial invasion of pomatiopsid gastropods in the heavy-snow region of the Japanese Archipelago

<p>Abstract</p> <p>Background</p> <p>Gastropod mollusks are one of the most successful animals that have diversified in the fully terrestrial habitat. They have evolved terrestrial taxa in more than nine lineages, most of which originated during the Paleozoic or Mesozoic. The rissooidean gastropod family Pomatiopsidae is one of the few groups that have evolved fully terrestrial taxa during the late Cenozoic. The pomatiopsine diversity is particularly high in the Japanese Archipelago and the terrestrial taxa occur only in this region. In this study, we conducted thorough samplings of Japanese pomatiopsid species and performed molecular phylogenetic analyses to explore the patterns of diversification and terrestrial invasion.</p> <p>Results</p> <p>Molecular phylogenetic analyses revealed that Japanese Pomatiopsinae derived from multiple colonization of the Eurasian Continent and that subsequent habitat shifts from aquatic to terrestrial life occurred at least twice within two Japanese endemic lineages. Each lineage comprises amphibious and terrestrial species, both of which are confined to the mountains in heavy-snow regions facing the Japan Sea. The estimated divergence time suggested that diversification of these terrestrial lineages started in the Late Miocene, when active orogenesis of the Japanese landmass and establishment of snowy conditions began.</p> <p>Conclusions</p> <p>The terrestrial invasion of Japanese Pomatiopsinae occurred at least twice beside the mountain streamlets of heavy-snow regions, which is considered the first case of this event in the area. Because snow coverage maintains stable temperatures and high humidity on the ground surface, heavy-snow conditions may have paved the way for these organisms from freshwater to land via mountain streamlets by preventing winter desiccation in mountain valleys. The fact that the terrestrialization of Pomatiopsidae occurred only in year-round wet environments, but not in seasonally dried regions, provides new insight into ancient molluscan terrestrialization.</p

Inferability of Unions of Certain Closed Set Systems

In this thesis we study inferability in the limit from positive data for the classes of bounded and unbounded unions of certain class of languages. In order to show inferability, we put an emphasis on a characteristic set of a given language. This thesis consists of two parts: one for bounded unions, and the other for unbounded unions. In both cases, the notion of characteristic sets plays an important role to show inferability and to construct learning algorithms concretely. We consider a class of languages called a closed set system C. For bounded unions, we consider the bounded union ∪^C of closed set systems C and we assume the following three conditions: (1) C is Noetherian, (2) C is compact, and (3) a characteristic set of a given closed set in ∪^C can be constructed from its characteristic set in C. Then we have a learning algorithm of ∪^C concretely under these conditions, by using the notion of hypergraphs. We give two examples of closed set systems that satisfy the above three conditions, and apply our algorithm to them. For unbounded unions, we consider the unbounded union C⋆ of closed set systems such that there exists an algorithm for generating a characteristic set consisting of one element. We construct a learning algorithm of C⋆ concretely, and give two examples. Furthermore, we investigate relation between those examples and transaction databases, and attempt to apply our algorithm to the transaction databases.首都大学東京, 2011-03-25, 博士（理学

ニホン トウコ コユウ ノ リクガイ ニッポン マイマイゾク ( ナンバン マイマイカ ) ノ タヨウセイ ト シュ ブンカ

京都大学0048新制・課程博士博士(人間・環境学)甲第14707号人博第443号新制||人||109(附属図書館)20||人博||443(吉田南総合図書館)UT51-2009-D419京都大学大学院人間・環境学研究科相関環境学専攻(主査)教授 加藤 眞, 教授 松井 正文, 准教授 市岡 孝朗, 教授 曽田 貞滋学位規則第4条第1項該当Doctor of Human and Environmental StudiesKyoto UniversityDA

DNA barcodes and morphology revealed three species masquerading in Xiphydria camelus of authors (Hymenoptera, Xiphydriidae) in Northeast Asia: X. eborata sp. rev. and X. albopicta sp. nov.

Shinohara, Akihiko, Kameda, Yuichi (2019): DNA barcodes and morphology revealed three species masquerading in Xiphydria camelus of authors (Hymenoptera, Xiphydriidae) in Northeast Asia: X. eborata sp. rev. and X. albopicta sp. nov. Zootaxa 4612 (2): 171-186, DOI: 10.11646/zootaxa.4612.2.