文献一覧: 藤田航 (著者)

24 0 0 0 OA 音楽幻聴 (楽音性耳鳴) に関する臨床的検討

著者: 御子柴卓弥新田清一中山梨絵鈴木大介坂本耕二島貫茉莉江岡田峻史藤田航鈴木法臣大石直樹小川郁
出版者: 一般社団法人日本聴覚医学会
雑誌: AUDIOLOGY JAPAN (ISSN:03038106)
巻号頁・発行日: vol.62, no.4, pp.315-325, 2019-08-30 (Released:2019-09-12)
参考文献数: 18

要旨: 音楽幻聴は, 外部からの音刺激がないのに歌や旋律が自然に聞こえる現象であり, 耳鳴患者の中にも稀に存在する。2011年1月から2018年10月までに当科を受診した耳鳴患者のうち, 音楽幻聴を訴えた23例の臨床像を検討した。このうち11例に対し耳鳴について詳細に説明した上で補聴器による音響療法を行い, 治療効果を検討した。音楽幻聴症例は, 高齢者・女性に多く1例を除く全例で感音難聴を認めた。全例で病識が保たれており, 精神神経科疾患の合併を認めなかった。治療後に Tinnitus Handicap Inventory の合計値, 耳鳴の自覚的大きさ・苦痛の Visual Analogue Scale は有意に改善した。本検討から, 精神神経科疾患の合併がなく難聴が主病因の音楽幻聴に対し耳鳴の説明と補聴器による音響療法が有効な治療である可能性が示唆され, 耳鼻咽喉科医が中心となり診療に携わることが望ましいと考えられた。

2023-08-18 11:55:06
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5 0 0 0 OA Seismic ambient noise interferometry applied to dense OBS array of off Ibaraki region

著者: 山谷里奈望月公廣悪原岳西田究市村強藤田航平山口拓真堀高峰
雑誌: JpGU-AGU Joint Meeting 2020
巻号頁・発行日: 2020-03-13

Off Ibaraki region is located at the southern end of the focal area of the 2011 off the Pacific coast of Tohoku Earthquake (Tohoku Earthquake). A dense network of 32 ocean bottom seismometers (OBSs) was deployed at this region with a station interval of about 6 km from October 2010 (11 OBSs started from February 2010) to October 2011. A large number (> 10,000) of aftershocks following the 2011 Tohoku earthquake were detected by this network. However, precise determination of these hypocenters and focal mechanisms is challenging due to uncertainties of seismic properties of thick sediment layers beneath the seafloor. The P-wave velocity structure has been reasonably constrained by active-source seismic surveys (Mochizuki et al., 2008), but the S-wave velocity structure is still unrevealed despite its importance.To constrain the S-wave velocity of the shallower portion, we apply the ambient noise interferometry to the short-period OBS data in this study. After dividing the data into ten-minute segments, we deconvolve the data with instrumental response function, remove trends, and discard data dominated by seismic events. Then, we apply a one-bit normalization and spectrum whitening. Finally, we calculate cross-correlations for vertical-vertical, radial-radial, and transverse-transverse components to retrieve Green's functions.We measure average phase velocity in the array using spatial auto-correlation method (Aki, 1957; Nishida et al., 2008). The phase velocities of the fundamental Rayleigh, the first-higher Rayleigh, and the fundamental Love modes are 0.5 to 2.5 km/s (in the frequency range of 0.1 to 0.3 Hz), 0.8 to 1.5 km/s (0.17 to 0.3 Hz), and 0.5 to 2.0 km/s (0.25 to 0.1 Hz), respectively. Next, we infer the 1-D average S-velocity isotropic structure by non-linear inversion, whose sensitivity is mainly ~5 km. The results show ~1000 m thick sediment with S-wave velocity of 300–1000 m/s immediately beneath the seafloor. At last, we apply band-pass filter with frequency range of 0.125 Hz and measure travel-time anomaly of the phase velocity in each frequency range, following Nagaoka et al. (2012). We apply non-linear inversion (Rawlinson & Sambridge, 2003) and find low-velocity anomalies in the deeper of the northern part and in the shallower of the center part.

2020-07-11 21:53:39
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https://confit.atlas.jp/guide/event/jpgu2020/subject/SSS03-03/detail

4 0 0 0 地震波干渉法による茨城沖領域の構造推定

著者: 山谷里奈望月公廣悪原岳市村強藤田航平山口拓真堀高峰
出版者: 日本地震学会
雑誌: 日本地震学会2019年度秋季大会
巻号頁・発行日: 2019-08-15

2019-09-14 12:08:28
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https://confit.atlas.jp/guide/event/zisin2019/subject/S06P-09/detail

4 0 0 0 6-6 事例調査に基づく近隣交流型シェアハウスの成立条件に関する考察(計画系)

著者: 藤田航平菊地吉信
出版者: 一般社団法人日本建築学会
雑誌: 日本建築学会北陸支部研究報告集 (ISSN:03859622)
巻号頁・発行日: no.54, pp.383-386, 2011-07-10

This study focuses on the Shared Housings that have relationship with the neighborhoods, and aims to clarify the characteristics of these shared housing. In addition, this study examines the influence that the shared housing of this type over neighborhood. The main result is as follows. That is, the shared housing of this type leads not only to satisfy the tourists but also to awake the neighbor's concern for local character. The sheared housing of this type is thought as an effective device to promote the exchange of the neighbors and the outsiders.