A5044858470- Geology and Paleoclimatology Research
- Geological formations and processes
- Marine and coastal plant biology
- Paleontology and Stratigraphy of Fossils
- Geological Formations and Processes Exploration
- Civil and Geotechnical Engineering Research
- Marine and environmental studies
- Robotic Locomotion and Control
- Biomimetic flight and propulsion mechanisms
- earthquake and tectonic studies
- Robotic Path Planning Algorithms
- Concrete Properties and Behavior
- Muscle activation and electromyography studies
- Face recognition and analysis
- Image and Video Stabilization
- Underwater Acoustics Research
- AI in cancer detection
- Modular Robots and Swarm Intelligence
- Robotics and Automated Systems
- Cephalopods and Marine Biology
- Image Processing and 3D Reconstruction
- Evolution and Paleontology Studies
- Fire effects on concrete materials
- Advanced Neural Network Applications
- Coastal and Marine Dynamics
Chuo University
2024
Kyoto University
2018-2024
Planetary Science Institute
2017-2019
Tohoku University
2017
Chiba University
2012-2016
Chiba Institute of Technology
2003
Tokyo University of Science
2001-2002
Hitachi (Japan)
1983
徳島県北部島田島に分布する上部白亜系和泉層群板東谷層において,層序,岩相の時空分布,地質構造,そして堆積環境を詳細に検討した.ここの板東谷層は厚さ10 m程度のチャネル充填堆積物とチャネル間堆積物が繰り返し累重することから,海底扇状地のフロンタルスプレーの堆積物であると解釈される.また,海底扇状地システムの西方への前進・移動を反映したと考えられる上方粗粒化の大傾向が,本層全体を通じて認められる.島田島に分布する板東谷層は生痕化石Archaeozosteraを多産するが,その産出層準は泥岩の占める割合が比較的高い最下部の層準に限られる.この事実は,Archaeozosteraの形成者が,混濁流による物理的撹乱の影響が少なく,安定した海底環境が相対的に長い期間持続する場所に限って生息したためと考えられる.
本研究では,岩石切片のスキャン画像中から粒子を自動検出し,砂粒子スケールで堆積岩の組織を解析する画像解析手法を開発した.まず,白亜系和泉層群および姫浦層群から採取した砂岩切片のスキャン画像から,教師画像として手動トレース画像を1589枚用意した.これらの画像を用いて畳み込みニューラルネットワークの教師あり学習を行った後に,学習に使用しなかったテスト画像へ画像解析モデルを適用させた結果,ピクセルが正しく判定される率は90.7%となり,粒度分布のパターンも教師画像とよく一致した.本研究手法により,岩石の研磨断面から短時間かつ簡便に高解像度の粒度分析を行うことが可能となった.開発した手法を淡路島に分布する和泉層群のタービダイト砂岩に適用し,砂岩中の平行葉理の多様性を検討したところ,タービダイト中には二種類の平行葉理が含まれることが認識された.一つは平均粒径や標準偏差が周期的に変動する不明瞭な葉理であり,もう一つは細粒な堆積物中に薄い粗粒レイヤーが挟まれるという明瞭な葉理である.これらの葉理の成因については今後の実験的検討が必要となるだろう.
Sensor-based navigation is one of the most important researches for mobile robots domain and then there are many research works sensor-based navigation. We propose insects inspired landmark to pinpoint target position in this paper. There exist several such as snapshot model average which request absolute bearing information (compass) visual one. Whereas our method called relative angle (RAM) need only order extract positions 3 landmarks. By simulation experiment using 3D blimp-type flying...
This study examined the functional morphology of trace fossil Paleodictyon in terms computational fluid dynamics. The modern specimens show a unique that is composed hexagonal mesh structure, vertical shafts opening to seafloor, and shield-like mound on seafloor. traces were also preserved some examples. To explain their characteristic morphology, “passive ventilation” hypothesis has been proposed suggesting function was ventilate burrows with bottom currents, which supply both oxygenated...
Research Article| May 01, 2018 EVALUATION OF ICHNODIVERSITY BY IMAGE-RESAMPLING METHOD TO CORRECT OUTCROP EXPOSURE BIAS KAZUKI KIKUCHI; KIKUCHI 1Department of Geology and Mineralogy, Graduate School Science, Kyoto University, Kitashirakawaoiwake-cho, Sakyo-ku, Kyoto, 606-8502, Japan Search for other works by this author on: GSW Google Scholar HAJIME NARUSE; NARUSE NOBUHIRO KOTAKE 2Department Earth Sciences, Chiba 1-33, Yayoi-cho, Inage-ku, Chiba, 263-8522, PALAIOS (2018) 33 (5): 204–217....
Animals exhibit versatile locomotion patterns in response to the environment. To understand underlying decentralized control mechanism, this study focuses on centipedes which highly patterns. It is known that move by using their legs and body undulation. In addition this, we report here can combining expansion contraction of trunk with leg motion when they climb up slippery sticks. We hypothesized behavior emerges exploiting local forces generated at junction between as well ground reaction...