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RISS 인기검색어
- 검색키워드
- 저자 : Jun Adachi (검색결과 4 건)
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Audio-Based Video Editing with Two-Channel Microphone
Tetsuya Takiguchi,Jun Adachi,Yasuo Ariki 보안공학연구지원센터 2008 International Journal of Hybrid Information Techno Vol.1 No.3
Audio has a key index in digital videos that can provide useful information for video editing, such as capturing conversations only, clipping only talking people, and so on. In this paper, we are studying about video editing based on audio with a two-channel (stereo) microphone that is standard equipment on video cameras, where the video content is automatically recorded without a cameraman. In order to capture only a talking person on video, a novel voice/non-voice detection algorithm using AdaBoost, which can achieve extremely high detection rates in noisy environments, is used. In addition, the sound source direction is estimated by the CSP (Crosspower-Spectrum Phase) method in order to zoom in on the talking person by clipping frames from videos, where a two-channel (stereo) microphone is used to obtain information about time differences between the microphones.
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Keita Ohata,Masakazu Adachi,Keisuke Kusaka,Jun-ichi Itoh 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
This paper proposes a multi-modular AC-DC converter system using wireless communication for a rapid charger of electric vehicles (EVs). The multi-modular topology, which consists of multiple modules, has an advantage on the expandability regarding voltage and power. In the proposed system, the input current and output voltage are controlled by each decentralized controller, which wirelessly communicates to the main controller, on each module. Thus, high-speed communication between the main and modules is not required. As the results in a reduced number of signal lines. The fundamental effectiveness of the proposed system is verified with a 3-kW prototype. In the experimented results, the input current imbalance rate is reduced from 49.4% to 0.1%, where total harmonic distortion is less than 3%.
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Is glue embolization safe and effective for gastrointestinal bleeding?
Shinsaku Yata,Yasufumi Ohuchi,Akira Adachi,Masayuki Endo,Shohei Takasugi,Kazumichi Tsukam,Kensuke Matsumoto,Mika Kodani,Jun Makishima,Shinya Fujii 소화기인터벤션의학회 2018 International journal of gastrointestinal interven Vol.7 No.3
Transcatheter arterial embolization using N-butyl-2-cyanoacrylate (NBCA) for gastrointestinal arterial bleeding enables higher cessation rate and lower recurrent bleeding rate compared with conventional embolic materials including gelatin sponge, metallic coil, and polyvinyl alcohol (PVA) particle. Glue embolization is particularly effective in patients with coagulopathy. Even in the lower gastrointestinal tract, ischemic bowel complications by glue embolization are comparable to other agents. Glue embolization is also effective for arterial esophageal bleeding without any serious ischemic complications although the anatomy of the esophageal artery is complex and varied. For bleeding after abdominal surgery such as pancreaticoduodenectomy or hepatic lobectomy, interventional radiologists should be careful with indicating glue embolization because the presence of fewer collateral vessels can easily result in serious ischemic complications. Modified glue such as Glubran 2 (NBCA associated with methacryloxyfulfolane) can reduce the risk of ischemic complication due to its less thermal reaction, but the outcomes seem unsatisfactory.
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Is glue embolization safe and effective for gastrointestinal bleeding?
Shinsaku Yata,Yasufumi Ohuchi,Akira Adachi,Masayuki Endo,Shohei Takasugi,Kazumichi Tsukam,Kensuke Matsumoto,Mika Kodani,Jun Makishima,Shinya Fujii 소화기인터벤션의학회 2018 Gastrointestinal Intervention Vol.7 No.3
Transcatheter arterial embolization using N-butyl-2-cyanoacrylate (NBCA) for gastrointestinal arterial bleeding enables higher cessation rate and lower recurrent bleeding rate compared with conventional embolic materials including gelatin sponge, metallic coil, and polyvinyl alcohol (PVA) particle. Glue embolization is particularly effective in patients with coagulopathy. Even in the lower gastrointestinal tract, ischemic bowel complications by glue embolization are comparable to other agents. Glue embolization is also effective for arterial esophageal bleeding without any serious ischemic complications although the anatomy of the esophageal artery is complex and varied. For bleeding after abdominal surgery such as pancreaticoduodenectomy or hepatic lobectomy, interventional radiologists should be careful with indicating glue embolization because the presence of fewer collateral vessels can easily result in serious ischemic complications. Modified glue such as Glubran 2 (NBCA associated with methacryloxyfulfolane) can reduce the risk of ischemic complication due to its less thermal reaction, but the outcomes seem unsatisfactory.
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