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1 0 0 0 OA 凝固過程における鋼の固液界面エネルギーの予測とデンドライトアーム間隔の制御

著者: 水上英夫林宏太郎沼田光裕山中章裕
出版者: 一般社団法人日本鉄鋼協会
雑誌: 鉄と鋼 (ISSN:00211575)
巻号頁・発行日: vol.97, no.9, pp.457-466, 2011-09-01 (Released:2011-09-06)
参考文献数: 50
被引用文献数: 1 8

Solid–liquid interfacial energy of steel during solidification was measured predicted from the both experimental techniques of unidirectional solidification and thermal analysis applying the dendrite growth model and heterogeneous nucleation model. Solid–liquid interfacial energy changed depending on primary phase during solidification, i.e., that of primary δ phase was larger than that of γ phase. When the primary phase was the same, solid–liquid interfacial energy increased with increasing carbon content. Primary dendrite arm spacing changed depending on solid–liquid interfacial energy. A trace amount of bismuth which had the effect of a decrease in the solid–liquid interfacial energy of steel during solidification decreased primary and secondary dendrite arm spacing, significantly.

2012-01-29 03:14:24
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1 0 0 0 良性発作性頭位眩暈症(BPPV)に対するSemont法(liberatory maneuver)の効果

著者: 倉島一浩國弘幸伸齋藤晶上村隆一郎小林宏成神崎仁
出版者: Japan Society for Equilibrium Research
雑誌: Equilibrium research (ISSN:03855716)
巻号頁・発行日: vol.56, no.6, pp.560-568, 1997-12-01
被引用文献数: 4 1

We retrospectively determined the efficacy of Semont's liberatory maneuver in 52 patients with benign paroxysmal positional vertigo (BPPV). Vertigo and torsional nystagmus, characteristic of BPPV, had been induced by the Hallpike maneuver at the time of diagnosis.<BR>Thirty of these patients were treated by Semont's maneuver after being informed in detail about the method. If vertigo reoccurred after treatment, they repeated the maneuver at home twice a day (after awaking and before going to bed) until vertigo disappeared. Patients received no medication and were followed until complete remission or for up to 1 year. The other 22 patients received either no treatment or were treated with medication only; they were followed for up to 9 years.<BR>Disappearance of nystagmus was ascertained for the first group only at our dizziness clinic. While most of these patients exhibited nystagmus lasting‹30 seconds (indicating the mechanism of canalolithiasis), two had nystagmus lasting›1 minute, a sign of cupulolithiasis-induced BPPV. Complete remission of BPPV occurred in 28 patients in the first group or 93.3%; 19 (68%) of these patients showed remission within 3 days. In the second group, the vertigo was resolved in only 9 of the 22 patients (40.9%). The difference in the remission rate of the two groups was significant (p<0.0001).<BR>Our results proved the efficacy of Semont's maneuver for treating not only the more common type of BPPV caused by canalolithiasis but also the less common type induced by cupulolithiasis.

2011-06-23 12:59:49
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1 0 0 0 生体磁気計測システム(<特集>生体と磁気に関する最近の研究)

著者: 川勝真喜小林宏一郎内川義則小谷誠
出版者: 日本医療機器学会
雑誌: 医科器械学 (ISSN:0385440X)
巻号頁・発行日: vol.69, no.5, pp.240-245, 1999-05-01

2011-04-11 02:03:49
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https://ci.nii.ac.jp/naid/110002515861

1 0 0 0 43-Gbps高速EA/DFBレーザのアンクールド動作(超高速伝送・変復調・分散補償技術,超高速光信号処理技術,広帯域光増幅・WDM技術,受光デバイス,高光出力伝送技術,一般,(ECOC報告))

著者: 林宏暁牧野茂樹北谷健塩田貴支篠田和典田中滋久青木雅博笹田紀子直江和彦
出版者: 一般社団法人電子情報通信学会
雑誌: 電子情報通信学会技術研究報告. LQE, レーザ・量子エレクトロニクス (ISSN:09135685)
巻号頁・発行日: vol.109, no.245, pp.187-190, 2009-10-15

高速,低チャープ,小型,低消費電力といった特長を有する電界吸収型光変調器と分布帰還形レーザをモノリシック集積したEA/DFBレーザは,次世代高速通信用光源として有望である.ペルチェ素子による温度調整を必要としない,いわゆるアンクールド動作が実現できれば,さらなる低消費電力化が可能である.我々はこれまでにEA/DFBレーザを作製し,0〜85℃の広い温度範囲において1.55μm帯10Gbps 40km,80km伝送を実現してきた.本研究では1.3μm帯アンクールドEA/DFBレーザを開発し,Al系材料を変調器部に適用しバットジョイント法を用いた集積技術および低容量化技術により,広い温度範囲における43Gbps 10km単一モードファイバ伝送を世界で初めて達成したので報告する.