著者
張 睿
出版者
東京大学
雑誌
特別研究員奨励費
巻号頁・発行日
2012

Ge channel is one of the most promising solution for CMOS devices in post-Si age. Mobility enhancement is the most critical issue limiting the application of Ge MOSFETS. Recently, although many progresses have been achieved for high mobility Ge MOSFETs, mobility degradation in high normal field region is still severe which strongly reduces the ON state current in Ge MOSFETs. The mechanism of this phenomenon is not clear yet, in spite of importance. Therefore, in our research the physical origins causing high normal field mobility degradation were systematically investigated. Through the evaluation of Hall mobility in Ge MOSFETs, it is found that large amount of surface states exist inside valence and conduction band of Ge, which results in significant decrease of mobile carrier concentration in the channel and rapid reduction of effective mobility of Ge MOSFETs.Additionally, it is confirmed that the surface states inside conduction band of Ge can be passivated by annealing the Ge nMOSFETs in atomic deuterium ambient. Besides of surface states, it is also confirmed that the surface state roughness scattering dominates the mobility in high normal field for Ge MOSFETs, similar with the situation in Si MOSFETs. With decreasing the post oxidation temperature, the surface roughness at GeOx/Ge interfaces can be sufficiently reduced without losing the superior electrical passivation much. As a result, around 20% and 25% mobility enhancement can be realized for Ge pMOSFETs and nMOSFETs, respectively, in a high normal field region of N_s=10^<13> cm^<-2> by reducing the post oxidation temperature from 300℃ down to room temperature.
著者
Akiko UZAWA Koichi ANDO Yoshiya FURUSAWA Go KAGIYA Hiroshi FUJI Masaharu HATA Takeji SAKAE Toshiyuki TERUNUMA Michael SCHOLZ Sylvia RITTER Peter PESCHKE
出版者
Journal of Radiation Research 編集委員会
雑誌
Journal of Radiation Research (ISSN:04493060)
巻号頁・発行日
vol.48, no.Suppl.A, pp.A75-A80, 2007 (Released:2007-05-19)
参考文献数
15
被引用文献数
20

Charged particle therapy depends on biological information for the dose prescription. Relative biological effectiveness or RBE for this requirement could basically be provided by experimental data. As RBE values of protons and carbon ions depend on several factors such as cell/tissue type, biological endpoint, dose and fractionation schedule, a single RBE value could not deal with all different radiosensitivities. However, any biological model with accurate reproducibility is useful for comparing biological effectiveness between different facilities. We used mouse gut crypt survivals as endpoint, and compared the cell killing efficiency of proton beams at three Japanese facilities. Three Linac X-ray machines with 4 and 6 MeV were used as reference beams, and there was only a small variation (coefficient of variance < 2%) in biological effectiveness among them. The RBE values of protons relative to Linac X-rays ranged from 1.0 to 1.11 at the middle of a 6-cm SOBP (spread-out Bragg peak) and from 0.96 to 1.01 at the entrance plateau. The coefficient of variance for protons ranged between 4.0 and 5.1%. The biological comparison of carbon ions showed fairly good agreement in that the difference in biological effectiveness between NIRS/HIMAC and GSI/SIS was 1% for three positions within the 6-cm SOBP. The coefficient of variance was < 1.7, < 0.6 and < 1.6% for proximal, middle and distal SOBP, respectively. We conclude that the inter-institutional variation of biological effectiveness is smaller for carbon ions than protons, and that beam-spreading methods of carbon ions do not critically influence gut crypt survival.
著者
井上 和人
出版者
関東学院大学[文学部]人文学会
雑誌
関東学院大学文学部紀要 (ISSN:02861216)
巻号頁・発行日
vol.129, pp.177-194, 2014-01

『風流今平家』(元禄十六年三月刊)は、西沢一風の浮世草子で唯一副題簽をもつ。副題簽は当該巻の大意を内容とし、書式は「此巻は……のせたり(しるせり・うつせり)」で統一されている。この『風流今平家』の副題簽は、どこから着想を得たものであろうか。一風以前の浮世草子で副題簽をもつ作品といえば、西鶴『好色一代女』(貞享三年六月刊)が周知のところ。だが、『風流今平家』の副題簽と『好色一代女』のそれとは、明らかに書式が異なり、『好色一代女』にならったものとはいいがたい。本論文では、『風流今平家』の副題簽は、枕本型軍記の目録形式、とりわけ目録に備わる大意を模していると考えた。そこで、まず枕本型軍記の流行と特色について整理し、ついで浮世草子に及ぼした影響について述べる。
著者
狩野平六 著
出版者
群馬県警察部
巻号頁・発行日
1930
著者
Alexy Robert 小山 剛
出版者
名城大学法学会
雑誌
名城法学 (ISSN:04616898)
巻号頁・発行日
vol.43, no.4, pp.p179-193, 1994-02
被引用文献数
2
著者
大村 吉幸
出版者
東京大学
雑誌
若手研究(B)
巻号頁・発行日
2012-04-01

人の手指運動の巧みさの仕組みの解明のために、本研究では、手になじむ触覚センサグローブの開発を行った。独自の小型圧力センサをフレキシブル基板に埋め込む技術を開発し、手になじむ触覚グローブを構成した。また、手指の運動を計測するためのモーションキャプチャ装置を独自に開発し、組み合わせ、日常物体を操作するときの、手指の接触と運動の同時計測を行い、解析を行った。以上の成果により人の手指運動の巧みさを調べる基盤技術の進歩に寄与した。
著者
Sasaki Shigeru KATAYAMA Paul K Roesler Mark Pattillo Roland A Mattingly Richard F. OHKAWA Kimiyasu
出版者
社団法人日本産科婦人科学会
雑誌
日本産科婦人科學會雜誌 (ISSN:03009165)
巻号頁・発行日
vol.34, no.12, pp.2253-2256, 1982-12-01
被引用文献数
21

Gestational choriocarcinomaの患者から樹立された5つの細胞株についてGiemsa染色およびQ-バンド分染法による染色体分析を施行した.5つの絨毛癌細胞株の染色体数はいずれも低四倍体にそのモードを有しており,どの細胞株にも構造の変化した分類不能の染色体がいわゆるマーカー染色体として認められた.正常男児出産後に発生した絨毛癌細胞株2株のうちBeWo株にはY染色体をみることができなかつたがJar株には明らかにY染色体が認められた.また完全胞状奇胎後に発症した絨毛癌2株のうちElFa株には明らかにY染色体が認められ,もうひとつのDoSmi株には対をなす染色体にheterozygousの組み合わせがみられた.長年の継代培養による影響を考慮に入れてもこれらの先行妊娠である胞状奇胎は2精子受精によるものであることが示唆された.ところで先に我々は46,XY完全胞状奇胎が2精子受精であることを証明し発表しているが,その後の追加症例の経験から2精子受精の胞状奇胎に悪性化が高頻度に起こるのではないかという印象を持つていた.今回の研究結果から今後2精子受精による胞状奇胎の予後に注目すべきであると考えられた.
著者
Yasunobu NAKAI Yoshiro ITO Masayuki SATO Kazuhiro NAKAMURA Masanari SHIIGAI Tomoji TAKIGAWA Kensuke SUZUKI Go IKEDA Satoshi IHARA Toshiyuki OKUMURA Masashi MIZUMOTO Koji TSUBOI Akira MATSUMURA
出版者
社団法人 日本脳神経外科学会
雑誌
Neurologia medico-chirurgica (ISSN:04708105)
巻号頁・発行日
vol.52, no.12, pp.859-864, 2012 (Released:2012-12-25)
参考文献数
26
被引用文献数
3

A total of 29 cerebral arteriovenous malformations (AVMs) treated at the University of Tsukuba with multimodality treatment including proton beam (PB) radiotherapy for cerebral AVMs between 2005 and 2011 were retrospectively evaluated. Eleven AVMs were classified as Spetzler-Martin grades I and II, 10 as grade III, and 8 as grades IV and V. For AVMs smaller than 2.5 cm and located on superficial and non-eloquent areas, surgical removal with/without embolization was offered as a first-line treatment. For some small AVMs located in deep or eloquent lesions, gamma knife (GK) radiosurgery was offered. Some AVMs were treated with only embolization. AVMs larger than 2.5 cm were embolized to achieve reduction in size, to enhance the safety of the surgery, and to render the AVM amenable to GK radiosurgery. For larger AVMs located in deep or eloquent areas, PB radiotherapy was offered with/without embolization. Immediately after the treatment, 24 patients exhibited no neurological worsening. Four patients had moderate disability, and 1 patient had severe disability. Three patients suffered brain damage after surgical resection, and 2 patients suffered embolization complications. However, no neurological worsening was observed after either GK radiosurgery or PB radiotherapy, but 3 patients treated by PB radiotherapy suffered delayed hemorrhage. Fractionated PB radiotherapy for cerebral AVMs seems to be useful for the treatment of large AVMs, but careful long-term follow up is required to establish the efficacy and safety.
著者
Noriaki SAKAMOTO Eiichi ISHIKAWA Yasunobu NAKAI Hiroyoshi AKUTSU Tetsuya YAMAMOTO Kei NAKAI Masanari SHIIGAI Hideo TSURUSHIMA Tomonori ISOBE Shingo TAKANO Koji TSUBOI Akira MATSUMURA
出版者
社団法人 日本脳神経外科学会
雑誌
Neurologia medico-chirurgica (ISSN:04708105)
巻号頁・発行日
vol.52, no.12, pp.878-884, 2012 (Released:2012-12-25)
参考文献数
27
被引用文献数
9 30 5

Intracranial hemangioblastomas (HBs) are hypervascular neoplasms mainly located in the posterior fossa of the central nervous system. Preoperative embolization of the feeding arteries is one proposal for reduction of intraoperative hemorrhage, although indications for the procedures should be evaluated carefully due to the potential complications. This retrospective study investigated clinical outcomes and complications of 15 patients with HBs in the posterior fossa to evaluate the safety and effectiveness of endovascular procedures as well as angiographical procedures. Surgical excision without presurgical embolization was performed in 8 cases, and excision with presurgical embolization was performed in 7 cases, using Guglielmi detachable coils with or without polyvinyl alcohol (GDC ± PVA) in 4 cases and only n-butyl 2-cyanoacrylate (NBCA) in 3 cases. The embolization was applied for selected cases in which feeding arteries were located in a deep site and hard to coagulate surgically. Partial embolization was achieved in 5 cases, and all feeders were successfully embolized in 2 cases. Total removal was achieved in 12 cases, and subtotal/partial removal was achieved in 3 cases. Subarachnoid hemorrhage with intratumoral hemorrhage occurred in 1 case during the angiographic procedure and in 1 case during the embolization procedures. The mean volume of intraoperative blood loss was clearly less in the NBCA group than in the GDC ± PVA group. HBs are mainly located in the posterior cranial fossa, so the risk of severe clinical complication may be high if vascular problems occur. In our series, presurgical embolization using NBCA made tumor removal safe and reduced bleeding volume in posterior fossa HBs.
出版者
物性研究刊行会
雑誌
物性研究 (ISSN:05272997)
巻号頁・発行日
vol.65, no.5, pp.678-685, 1996-02-20

この論文は国立情報学研究所の電子図書館事業により電子化されました。
著者
片山 哲也
出版者
日経BP社
雑誌
日経MAC (ISSN:09188894)
巻号頁・発行日
vol.8, no.6, pp.122-125, 2000-06

前回は,住所録や予定表といった個人情報管理データを,「Palm Desktop」を使って,Palm機とマックで連携して使う方法を解説した。住所録や予定表以外にも,テキスト,画像,データベース,ワークシートなどを,Palm機で自由に見ることができる。今回はさまざまなデータを,マックからPalm機に転送して利用する方法を紹介する。
著者
坂部 裕美子
出版者
公益財団法人統計情報研究開発センター
雑誌
基盤研究(C)
巻号頁・発行日
2011

1981-2000年入門力士の現役期間の全平均は6.12年であるが、その大半は2年目までに辞めている。これを関取経験者に限定してヒストグラムで表すと、平均値(14.64年)付近をピークとした正規分布に近い形になる。地位との関連で見ると、最高位である横綱の経験者の現役期間は最長でも16年だが、幕下以下の番付でこれより長い期間現役を務めるものもいる。この中には、役力士の付け人として、依頼されて現役を務める者も含まれる。
著者
中澤 壽三郎
出版者
公益社団法人 日本獣医学会
雑誌
應用獸醫學雑誌 (ISSN:1883907X)
巻号頁・発行日
vol.11, no.1, pp.25-32, 1938-01-20 (Released:2008-10-24)
被引用文献数
1