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The layered perovskite superconductor Sr2RuO4 (Tc = 1.5 K) has attracted much research interest, particularly because of its unconventional superconductivity. From the NMR Knight shift, as well as from the polarized neutron scattering, the spin wave function is most likely triplet with a vector order parameter pointing to the z direction (with paired parallel spins lying within the RuO2...
We consider an incompressible viscous fluid with the kinematic viscosity v between two infinitely long concentric cylinders with radii a and b (b > a). The fluid experiences a shear motion produced by pulling the inner cylinder with the axial speed U while keeping the outer cylinder at rest (see Fig.1). The axial basis flow at the radius r, $$U_{B}(r) = R\frac{\ln(r(1 - \eta)/2)}{\ln(\eta)},$$...
Comparative electrical designs of radial- and axial-flux permanent magnet machines (AFPMs) under space limitation are described in this paper. The target machines are conventional radial-flux machines and axial-flux machines with a single stator between two rotors. An analytical equation for designing axial-flux machines is derived considering given dimensions. The torque densities are calculated...
Objective olfactory test is rare. Recently, near-infrared spectroscopy has been used to study functional activations of the brain. We used multi-channel near-infrared spectroscopy to monitor the activity of the frontal cortex as mirrored by hemodynamic responses subjected to olfactory stimulation. The aim of this study is to establish the objective olfactory Assessment using Multichannel near-infrared...
Olfactory impairment is a characteristic of early stage of Parkinson's disease (PD). Over 95% of PD patients present with severe olfactory loss. Almost all olfactory tests are subjective. Therefore, olfactometry cannot be performed unless the patient himself/herself notices olfactory impairment. When the condition of the patients was diagnosed as a PD, they had completely lost their sense of olfaction...
We report a spheroid forming lab-on-a-chip that can be used to control the size of three-dimensional hepatocyte spheroids by using micro-rotational flow. This device can form hepatic spheroids with diameters in the range 130-430 ??m by varying the chamber diameter and the cell density. The developed lab-on-a-chip consisted of a polydimethylsiloxane-based micro-chamber produced by soft lithography...
This paper presents a 0.13 um BiCD process (BiCD-0.13) based on a 0.13 um standard CMOS technology with a superior Deep Trench Isolation(DTI). Merits of using DTI are to improve breakdown voltage, reduce parasitic transistor actions and increase area density, compared with Junction-Isolation. We simulated the stress and the device characteristics, and optimized the parameters of DTI design and process...
Today there are many tactile sensors in the world. Though there is few sensor whose characteristics are similar to cutaneous sensation of human. If we want to measure the tactile information of human we have to use human-like tactile sensor. Here we have developed a reflection-type tactile sensor by using imaging device. This sensor employs a simple total reflection characteristic, so it has many...
Maximum likelihood (ML) estimation is widely used in many computer vision problems involving the estimation of geometric parameters, from conic fitting to bundle adjustment for structure and motion. This paper presents a detailed discussion on the bias of ML estimates derived for these problems. Statistical theory states that although ML estimates attain maximum accuracy in the limit as the sample...
In this presentation, we discuss the strategy and methodology to let the fields of science and technologies get together and join to birth an integrated discipline. It is widely accepted that recent social problems which concern on such as environment, economy, safety and human health problems need integral work of several fields of sciences and technologies. It is important to maintain the cooperation...
Hepatocytes are responsible for metabolic and detoxification processes in the liver. During the tissue formation from isolated cells, they increase the cell density and acquire their liver-specific functions, new protein expression and cell signaling. Hence, tissue-based in vitro studies are strongly demanded. We develop a MEMS platform which forms 3D spheroids by microfluodic handing of cells. The...
This paper proposes a novel concept for the image based visual control, which is called the goal-oriented just-in-time visual servoing. We apply this control to ball catching task by a robot arm. This approach contains the processes: 1. To achieve the control of robot arm 3D motion using visual observation, we employ no information to reconstruct 3D space from the 2D images, and only define the goal...
Our research aims to realize "a biped robot with vision" as like human has. We has constructed 2DOF gaze control system with motion database structure on a biped robot and it is shown that this system enables a biped robot to keep fixed wide view field during a motion. Keeping fixed wide view field during a motion is of advantage for motion tasks of a biped robot with environment recognition.
This paper presents a new algorithm for the problem of robust subspace learning (RSL), i.e., the estimation of linear subspace parameters from a set of data points in the presence of outliers (and missing data). The algorithm is derived on the basis of the variational Bayes (VB) method, which is a Bayesian generalization of the EM algorithm. For the purpose of the derivation of the algorithm as well...
A 6-bit 3.5-GS/s flash ADC is fabricated in a 90nm CMOS process. A clamp diode with a replica biasing and an acceleration capacitor are introduced for high-speed overdrive recovery. Averaging network is analyzed to explore the effect of tail current mismatch. The 3.5-GS/s ADC consumes 98mW with 0.9V power supply. Its SNDR is 31.18dB with Nyquist frequency input.
Using an imaging system in which the image plane can be tilted with respect to the optical axis of the lens, the image of a large-scale scene that appears to be a miniature to human eyes can be captured. This phenomenon suggests that the image contains information regarding the scale of the scene and that human vision can extract this information and recognize the scene scale from a single image....
We are motivated to deal with a biped robot by the existence of an almighty powerful control mechanism of a human. Although a visual information, in particular, plays an important role in order to realize admirable intelligence in a humanoid robot, we must assert a vision to be one of the developing sensors. In fact, there are many difficulties of both aspects of restrictive hardware resources for...
Humans can keep a stick on the fingertip upright position for a certain time after a brief exercise, although we have a large time delay due to signal transfer in the optic nerve and due to information processing in the brain. Correspondingly in an experiment on the stabilization of the mechanical inverted pendulum, we use a normal frame rate camera as an angle sensor of the pendulum, and its large...
This paper presents a method for synchronizing multiple cameras from only the images captured by the cameras, assuming that they are not connected to an external clock signal source. It is assumed that The cameras are stationary and take the images of the same scene from various viewpoints, in which there are moving objects such as human in motion. The method uses the appearance changes in an image...
This paper describes the strategy of optimal action selection for recognition of the observed object among those registered in the image data base from an information theoretic point of view. The goal is to reduce the number and effort of the recognition steps to reach the final decision of the recognition. We have chosen an information theoretic framework, motivated by the fact that sensored image...
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