巻号一覧
47 巻, 1 号
選択された号の論文の12件中1～12を表示しています
- |<
- <
- 1
- >
- >|
<特集 次世代イノベーションのためのシステム・インテグレーション>
-
水川 真, 栗栖 正充, 琴坂 信哉2011 年 47 巻 1 号 p. 1
発行日: 2011年
公開日: 2011/12/19
ジャーナル フリーPDF形式でダウンロード (139K)
論文
-
浅野 裕俊, 武藤 拓路, 井出 英人2011 年 47 巻 1 号 p. 2-7
発行日: 2011年
公開日: 2011/12/19
ジャーナル フリーThere is a relation to the accident of a car and the physiological and psychological state of a driver. The stress may lead to the fall of a fatigue or attentiveness. Therefore, it is an important subject from viewpoint such as accident prevention to evaluate the mental state of a driver. The study aimed at the development of a quantitative instrumentation technology of the stress when a subject is driving for a long time. First of all, we measured the physiological and psychological stress of a driver. The facial skin temperature and ventricular rate that was driver's physiological amount were measured and compared it with visual analog scale of the subjective amount. It was able to be obtaining of the high correlation in facial skin temperature and visual analog scale from the outcome of the experiment. Therefore, the possibility of appreciable of driver's stress at a facial skin temperature was shown. As a result of the experiment, we showed a possibility that facial skin temperature could evaluate long driving stress.抄録全体を表示PDF形式でダウンロード (971K) -
西 辰徳, 和田 義明, 三宅 美博2011 年 47 巻 1 号 p. 8-16
発行日: 2011年
公開日: 2011/12/19
ジャーナル フリーThe purpose of this study was to suggest the quantitative evaluation technique of hemiplegic gait and to make a study of its effectiveness. We measured spatial displacement of the back lumbar area (L3) on walking using a triaxial accelerometer. Further, we defined 5 characteristics based on relativeness between idiosyncraticness of hemiplegic gait and feature of kinematics information. In the experiment, the appropriateness of characteristics was estimated from the aspect of the correlation between characteristics and Brunnstrom Stage (BS), and the classification accuracy of BS classification system. The experiment result showed that the characteristics point to intercorrelate with BS. Additionaly, BS classification system could classify with a high degree of accuracy. These results indicated that 5 characteristics were effective in quantitative evaluation of the seriousness of hemiplegic gait and measuring trunk displacement and proposal technique were effective in quantitative evaluation of hemiplegic gait.抄録全体を表示PDF形式でダウンロード (1584K) -
永井 伊作, 渡辺 桂吾2011 年 47 巻 1 号 p. 17-24
発行日: 2011年
公開日: 2011/12/19
ジャーナル フリーA novel sensing system is proposed for measuring a 2-D position of a laser spot. The sensing system determines the position by calculating voltages of phototransistors behind a screen in a sensor box. There are several advantages of the system, such as a simple sensing box with four phototransistors and a screen, wide incidence angle up to 85°, high-speed measurement of 400Hz, undivided position detection, robustness against background light and large detecting area of 50×50mm2. Some experiments validated the accuracy and the robustness of the position measurement, in which the maximum error of the position was 2mm in various conditions of incidence angle, distance, and illuminance of background light.抄録全体を表示PDF形式でダウンロード (1471K) -
亀田 成司, 森山 祐介, 野田 健一, 岩田 穆2011 年 47 巻 1 号 p. 25-30
発行日: 2011年
公開日: 2011/12/19
ジャーナル フリーA high sensitivity CMOS bio photosensor applicable to a bioluminescent assay was developed with a 0.18µm CMOS image sensor (CIS) process. The bio photosensor consisting of a photosensor and a PWM 20bit A/D converter achieved high sensitivity for detecting a extremely low bioluminescence due to a large photodiode area, a long exposure time and the other noise reduction techniques. The bio photosensor chip has a 2×4 sensor array on a 2.45×2.45mm2 die. Experimental results with the bioluminescence showed the chip can detect below 10-5lux luminescence at room temperature and the power consumption is 32µW.抄録全体を表示PDF形式でダウンロード (964K) -
小原 健, 五十嵐 康伸, 橋本 浩一2011 年 47 巻 1 号 p. 31-39
発行日: 2011年
公開日: 2011/12/19
ジャーナル フリーOptical microscopes are widely used in biological and medical researches. By using the microscope, we can observe cellular movements including intracellular ions and molecules tagged with fluorescent dyes at a high magnification. However, a freely motile cell easily escapes from a 3D field of view of the typical microscope. Therefore, we propose a novel auto-focusing algorithm and develop a auto-focusing and tracking microscope. XYZ positions of a microscopic stage are feedback controlled to focus and track the cell automatically. A bright-field image is used to estimate a cellular position. XY centroids are used to estimate XY positions of the tracked cell. To estimate Z position, we use a diffraction pattern around the cell membrane. This estimation method is so-called Depth from Diffraction (DFDi). However, this method is not robust for individual differences between cells because the diffraction pattern depends on each cellular shape. Therefore, in this study, we propose a real-time correction of DFDi by using 2D Laplacian of an intracellular area as a goodness of the focus. To evaluate the performance of our developed algorithm and microscope, we auto-focus and track a freely moving paramecium. In this experimental result, the paramecium is auto-focused and kept inside the scope of the microscope during 45s. The evaluated focal error is within 5µm, while a length and a thickness of the paramecium are about 200µm and 50µm, respectively.抄録全体を表示PDF形式でダウンロード (1041K)
ショート・ペーパー
-
水戸 和, 美馬 達也, 山添 大丈, 吉田 俊介, 多田 昌裕, 寒川 雅之, 金島 岳, 奥山 雅則, 野間 春生2011 年 47 巻 1 号 p. 40-42
発行日: 2011年
公開日: 2011/12/19
ジャーナル フリーWe have designed and fabricated a tactile array sensors with three inclined micro-cantilevers embedded in elastomer, which can detect both normal and shear stresses. In this paper, we confirmed gripping status classification using sensor output. Using our sensor, four gripping status (free, grasping, holding and slipping) could be classified significantly.抄録全体を表示PDF形式でダウンロード (587K)
論文
制御
-
宮里 義彦2011 年 47 巻 1 号 p. 43-50
発行日: 2011年
公開日: 2011/12/19
ジャーナル フリーThe problem of constructing model reference adaptive H∞ control for a class of mixed parameter systems is considered in this manuscript. Mixed parameter systems are complex processes composed of distributed parameter systems (infinite dimensional systems) and lumped parameter systems (finite dimensional systems). Owing to infinite dimensional modes of distributed parameter systems, control of those complex systems via finite dimensional compensators, is a difficult but important problem from both theoretical and practical viewpoints. A stabilizing control signal is added to regulate the effect of infinite dimensional modes, and it is derived as a solution of certain H∞ control problem where the effect of infinite dimensional modes are considered as external disturbances to the process.抄録全体を表示PDF形式でダウンロード (894K) -
—非モデルベースの内視鏡自動位置決めアルゴリズム—山田 泰生, 西川 敦, 関本 貢嗣, 戸田 伸吾, 瀧口 修司, 三吉 範克, 小林 武治, 数原 幸平, 市原 貴晴, 倉下 直人, 土 ...2011 年 47 巻 1 号 p. 51-60
発行日: 2011年
公開日: 2011/12/19
ジャーナル フリーIn general endoscopic surgery, the surgeon operates instruments and the camera assistant operates an endoscope. Because of shortage of physicians, there are demands for transition to endoscopic solo surgery. For the purpose of this demand, the automatic endoscope positioning system which operates the endoscope instead of the camera assistant during surgery has been actively researched from home and abroad. Almost research of automatic endoscope positioning system has tried to make a model of camera assistant's endoscopic operation. However, there is no system which has enough performance as compared with the camera assistant. The difficulty of making an accurate model of camera assistant's endoscopic operation is the most significant factor. We propose a bio-inspired automatic endoscope positioning algorithm which is a nonmodel based approach and develop a system which was implemented the proposed algorithm. We assess the surgeon's procedure through gallbladder removal simulations using the automatic endoscope positioning system. We compare an algorithm which has been seen in previously research with the proposed algorithm. We validate the effectivity of the proposed method as compared with the surgeon's procedure.抄録全体を表示PDF形式でダウンロード (1308K) -
田中 秀幸, 大村 宗右2011 年 47 巻 1 号 p. 61-69
発行日: 2011年
公開日: 2011/12/19
ジャーナル フリーThis paper studies closed-loop identification based on the joint input-output method and spectral density functions for finite data. It is well known that the spectral density function is given by stochastic subspace identification methods, where the finite interval stochastic realization is often used for analyzing and guaranteeing the positive realness. In this paper, it is shown how the finite-interval stochastic realization is used for closed loop identification, and moreover how the error due to the finiteness convergences to zero.抄録全体を表示PDF形式でダウンロード (814K) -
井上 正樹, 和田 光代, 池田 雅夫2011 年 47 巻 1 号 p. 70-78
発行日: 2011年
公開日: 2011/12/19
ジャーナル フリーThis paper proposes non-exponential stabilization of linear time-invariant systems by linear time-varying controllers. We consider state feedback and dynamic output feedback to make the states of the closed-loop systems decay non-exponentially. We first introduce a non-exponential stability concept that the state of a time-varying system converges to the origin with a bound provided by a desired function. Then, we give non-exponential stabilizability conditions and time-varying controllers to achieve the desired behavior of the closed-loop systems. By the proposed methods, we can realize various non-exponential behaviors, which may improve control performance.抄録全体を表示PDF形式でダウンロード (601K)
ショート・ペーパー
-
川口 港, 簑 弘幸, 百瀬 桂子, Dominique M. DURAND2011 年 47 巻 1 号 p. 79-80
発行日: 2011年
公開日: 2011/12/19
ジャーナル フリーWe investigate if and how SR (stochastic resonance) can be shown in the presence of supra-threshold signals (SSR) in physiologically realistic neural networks. The mutual information was maximized at a specific amplitude of noise in larger neural networks, implying SSR.抄録全体を表示PDF形式でダウンロード (290K)
- |<
- <
- 1
- >
- >|