著者
藤田 広志 志村 一男 白石 順二 西原 貞光 東田 善治 山下 一也
出版者
公益社団法人日本放射線技術学会
雑誌
日本放射線技術學會雜誌 (ISSN:03694305)
巻号頁・発行日
vol.49, no.9, pp.1685-1703, 1993-09-01
被引用文献数
16

This professional Committee's report describes the results of the activities made by the Task Group for ROC Analysis in Digital Radiography in 1992. Beginning with interpreting the basis of ROC analysis, explanation is made of ROC curve fitting and ROC curve's statistically significant difference test. Next, explanation is made of LROC and FROC with the development from FROC to AFROC, as well as "continuous confidence method" (provisional designation) as the recent progress in ROC analysis, including its brief experimental results. Finally, report is made in the actual condition of ROC analysis in DR system and the investigational results of ROC analysis of CAD.
著者
吉井 英樹 白井 隼人 佛圓 俊一朗 小松 尚久
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. LOIS, ライフインテリジェンスとオフィス情報システム (ISSN:09135685)
巻号頁・発行日
vol.109, no.39, pp.109-112, 2009-05-14

都市部などにおいて衛星測位による位置情報を用いる場合,マルチパスの影響などにより大きな測位誤差が含まれるため,速度や加速度から静止状態,歩行状態を判断することは困難である.筆者らは,以前,この測位誤差の影響を小さくする手法として区間速度を開発した.本研究では,この区間速度の特性について詳細に述べ,静止状態と歩行状態を判別する手法を示す.また,この区間速度を用いて滞在区間の検出を試みる.
著者
白井 寿海 十川 清己 山本 和充 児島 健次 藤岡 弘 牧田 浩和 中村 康彦
出版者
公益社団法人日本薬学会
雑誌
Biological and Pharmaceutical Bulletin (ISSN:09186158)
巻号頁・発行日
vol.16, no.2, pp.172-177, 1993
被引用文献数
7 40

In order to prepare fine granules of sparfloxacin (SPFX), a new quinolone anti-bacterial drug that shows masking of the bitter taste of SPFX and dissolutes at a rapid rate, various film-coated fine granules containing 20% SPFX and 0-52% low-substituted hydroxypropylcellulose(L-HPC) in the cores, were prepared by a spray method. Mixtures of ethylcellulose (EC), hydroxypropylmethylcellulose (HPMC), titanium dioxide and sucrose stearate in weight ratios of X : Y : 2 : 1 (X+Y=6) were used as film materials.The degree of masking of the bitter taste by water-insoluble film, mainly consisting of EC and HPMC, increased by increasing the content ratio of EC to HPMC and the amount of films, but was also slightly affected by the amount of L-HPC in the cores, which were coated with either EC or EC/HPMC (4/2). On the other hand, the dissolution rate increased with an increased amount of L-HPC in the cores and with a decreasing ratio of EC to HPMC in the films. Increasing the amount of L-HPC in the cores, which induced a considerable expansion of the fine granules owing to their taking up of water from the dissolution medium, resulted in burstin of the film after a short lag time. The bioavailability of the film-coated fine granules containing 20% SPFX and 52% L-HPC in the cores and 10% EC/HPMC (4/2) in the coating film, which masked the bitter taste of SPFX and showed the optimal release characteristics, was equivalent to that of conventional tablets containing 100 mg SPFX in beagle dogs.
著者
柏村 孝義 森 孝男 白鳥 正樹 于 強 丸山 修
出版者
一般社団法人日本機械学会
雑誌
日本機械学會論文集. A編 (ISSN:03875008)
巻号頁・発行日
vol.62, no.603, pp.2422-2427, 1996-11-25
被引用文献数
14 2

The authors proposed a new practical optimum design method (=statistical optimization method) that consists of two steps of an effectivity analysis (using a combination of the design of experiments and the structural analysis) and mathematical programming. The design of experiments is used to generate the approximate evaluation functions for the controlling behavior depending on the changes of design variables of the object structure, using finite element analysis (FEA). The evaluation functions can also be used as tools for directly estimating the behavior of the designed structure. A successive quadratic programming (SQP) method is employed to solve the optimization problem of the approximate evaluation functions. It is confirmed that the proposed method call be used in solving various problems. In this study, the authors applied the present method to the optimum design of a frame column subjected to axial crushing. This study deals with many complex behaviors such as large deformation, contact and material nonlinearities as well as impact behavior. However, this problem has been solved easily using the present method, and satisfactory results of the effectivity analysis and optimum design are obtained.統計的最適化手法を用いて,複雑な非線形現象である動的圧潰現象における最適化および影響度解析を行った.応答曲面を用いた本手法では,複雑な非線形挙動を再現する高精度な推定式を得ることができるとともに最適化計算においても高い精度を有することが確認できた.
著者
白井 義男
出版者
千葉経済大学
雑誌
千葉経済論叢 (ISSN:0915972X)
巻号頁・発行日
vol.31, pp.57-62, 2005-01-31

P.コトラーのテキストを事例として、マーケティング・マネジメントの最近の変化を以下の4つの特徴として、日本のケースについて触れた。1.デジタル化の接続容易性 2.中間業者の排除と再構築 3.標準化から顧客の仕様対応、顧客化 4.産業の多角化と収束
著者
白松 利也 栗田 昌幸 三宅 晃司 SUK Mike 大木 聡 田中 秀明 三枝 省三
出版者
一般社団法人日本機械学会
雑誌
年次大会講演論文集 : JSME annual meeting
巻号頁・発行日
vol.2005, no.5, pp.285-286, 2005-09-18

In order to realize ultra-low flying heights, magnetic spacing variations due to manufacturing tolerances, environmental variations, and write-induced thermal protrusion need to be reduced. To decrease the flying height, we have developed a thermal flying-height control (TFC) slider that carries a micro-thermal actuator. Using the device, the magnetic spacing of these sliders can be controlled in-situ during operation of the drive. First prototype had shown insufficient characteristics when evaluated at a component-level prototype. Therefore, the purpose of this research is to verify drive-level feasibility and better actuator characteristics. After analytical design by simulation of heat transfer and thermal deformation, second type of TFC device was fabricated. Component level evaluation showed sufficient actuator characteristics that met the requirements leading to the development of drives with controllable flying-height sliders. Drive level evaluation showed its effectiveness in reducing the magnetic spacing.
著者
栗田 昌幸 白松 利也 三宅 晃司 加藤 篤 曽我 政彦 田中 秀明 三枝 省三 SUK Mike
出版者
一般社団法人日本機械学会
雑誌
年次大会講演論文集 : JSME annual meeting
巻号頁・発行日
vol.2005, no.5, pp.283-284, 2005-09-18

Today's head/disk interface design has a wide flying height distribution due to manufacturing tolerances, environmental variations, and write-induced thermal protrusion. To reduce the magnetic spacing loss due to these effects, we have developed an active head slider with nano-thermal actuator. The magnetic spacing of these sliders can be controlled in-situ during operation of the drive. After simulating the heat transfer in the slider and resulting thermal deformation of the air-bearing surface, we fabricated a thermal actuator by thin film processing. The evaluation by a read/write tester showed a linear reduction in magnetic height as electric power was applied to the actuator. The actuator's stroke was 2.5nm per 50mW with time constant of 1 msec. We found no significant impact to the reliability of the read element.
著者
木村 孝之 白木 広光
出版者
一般社団法人映像情報メディア学会
雑誌
映像情報メディア学会誌 : 映像情報メディア (ISSN:13426907)
巻号頁・発行日
vol.58, no.1, pp.99-107, 2004-01-01

We propose a new interline CCD (IL-CCD) image sensor which combines buried photodiodes and CCD registers driven through a barrier (DTB-CCD). The performance of the image sensor was simulated by three-dimensional numerical analyses, emphasizing on dark current and charge capacity. It was clarified that highly biased electrodes of the DTB-CCD absorbed most of the generation-recombination (g-r) currents at Si-SiO_2 interfaces beneath their electrodes and also the currents between electrodes with low biases and electrodes with high biases. The g-r currents were reduced by several orders at the interface under electodes with low biases, because holes were introduced under the interface. Most of the reduced g-r currents are also absorbed into their respective electrodes. However, a small part of the g-r currents generated at the above three interfaces flew into a channel, going over the potential barrier between the bottom of the SiO_2 layer and channel, to become a dark current. When the barrier height was increased, dark currents were significantly reduced. Therefore, the IL-CCD image sensor enables a device with very few dark currents. When a 8.3μm(H)×12μm(V) pixel includes two photodiodes and four transfer electrodes was used, more than 4.5〜5.0×10^4 electrons were transferred from photodiodes to CCD registers by 0V to 9.5V and -5.8 to 0V transfer pulses. Additionally, 4.0×10^4 electrons were transferred in the CCD by -5.8V to 0V amplitude using conventional 4-phase driving pulses.