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Shear wave elastography is useful for quantitatively evaluating tissue elasticity by measuring the speed of a shear wave induced within the body by acoustic radiation force. We proposed a pushing-and-tracking sequence, coded push-pulse excitation to increase the signal-to-noise ratio (SNR) of the observed shear wave propagation without increasing measurement time and push-pulse amplitude1). In this...
Shear wave elastography is useful for quantitatively evaluating tissue elasticity by measuring the speed of a shear wave induced within the body by acoustic radiation. The purpose of this paper is to demonstrate a pushing-and-imaging sequence, coded push pulse excitation to increase the signal-to-noise ratio (SNR) of the observed shear wave propagation without increasing measurement time and push...
A driver assistance control algorithm for a vehicle with an active front steering system is proposed in this paper. The control algorithm is designed so as to optimize the turning performance and realize the collision avoidance simultaneously under the constraints on the front wheel turn angle and the lateral tire force. The control algorithm is developed based on a model predictive control law for...
In order to achieve an utterance classifier that not only works robustly against speech recognition errors but also maintains high accuracy for input with no errors, we propose the following techniques. First, we propose a classifier training method in which not only error-free transcriptions but also recognized sentences with errors were used as training data. To maintain high accuracy whether or...
This paper proposes MIP (Mixed-Integer Programming)-based power distribution optimization method for decentralized energy network with electric vehicles (EVs). Decentralized energy network is a new grid systems toward independence from existing power grid, and renewable energy is main energy source for the decentralized energy network. EVs are expected to take an important role of future mobility...
Model of traffic infrastructure of multi-agent simulation model with mathematical optimization of urban traffic is improved by OpenStreetMap to simulate urban traffic more realistically. In this paper, the method to introduce OpenStreetMap data into the model and preliminary simulation results are shown.
This paper presents a novel method for architecture exploration of an intelligent robot system while satisfying high processing performance at low power by utilizing FPGA and remote computing resources. In order to ease development complexity in the conventional architecture exploration, ROS-compliant FPGA component technology is employed. As a case study, Visual SLAM (Self Localization and Mapping)...
We focus on a timetabling problem of university makeup classes and construct a scheduling system based on man-machine interaction which enables to reveal the essential and additional information of the problem domain. In order to achieve operable timetables of the makeup classes it is required to consider the courses of every student in the university, because the makeup class timetable is made after...
Biological tissues have specific cell patterns and well-organized structures which result from various organogenesis processes. Among which is branching morphogenesis which is the key developmental processes for many glandular tissues including lungs, kidney, salivary gland and liver. Many approaches were suggested to regenerate salivary gland tissue in vitro. Here, we developed a 3D culture technique...
The management of electric power demand is a key element in the creation of smart-energy communities. We are engaged in a field experiment with the participation of 51 households on Nushima Island, one of the remote islands of Japan, to study the effects of real-time feedback and dynamic pricing on electric power consumption using smart meters and tablet PCs. From the results of panel data analysis,...
In this paper, a multi-agent simulation model of urban traffic behavior using Origin-Destination data and an example of bus line optimization as an application of the model are showed. In the model, inhabitants' behaviors of travel are expressed by decision of inhabitant agents. They select one of means of mobility and route by optimizing their evaluation functions. There are too many search candidates...
We study a decentralized energy network composed of PV units, wind power generator, rechargeable batteries, electrical appliances, and an electric power router. The router manages the power transfer over the network. The decentralized energy network is a new grid systems toward independence from existing power grid, and the renewable energy is main energy source for the decentralized energy network...
For driver assistance system design and model based vehicle development, what kind of concept and property are required for a driver model have been studied from published literatures. A driver model requires driving skill level parameters because human drivers have various skill levels. The skill level can be raised with proficiency and sometimes changes with environment change. A model framework...
In this paper, a multi-agent simulation model of urban traffic behavior using origin-destination data is constructed. Traveler agents decide selection of mobility and route by optimizing their utility functions. There are too many search candidates in their decisions to calculate in practical time, thus mathematical optimization techniques are applied in modeling. Part of route search algorithms of...
The renewal of conventional energy systems is important countermeasures against global warming effects and natural hazards. A self-sustainable decentralized energy system is one of the promising solutions for future sustainable and resilient societies. "Nushima project" attempts to construct a prototype of a self-sustainable decentralized energy system based on DC power distribution of the...
We focus on a timetabling problem of university makeup classes and construct a scheduling system based on man-machine interaction which enables to reveal the essential and additional information of the problem domain. In this problem, makeup classes which are requested by the lecturers have to be scheduled to a specified time slot under the hard / soft constraints, e.g., schedules of the lecturers...
In this study we performed a microRNA (miRNA) array to characterize a stem cell population from human dental pulp-derived mesenchymal stromal cells (hDPSCs). miRNA-720 was found to regulate the stem cell phenotype of hDPSCs by targeting the pluripotency factor NANOG.
This paper proposes the estimation method of the threshold voltage (Vth) of the transistor from the frequency of the ring oscillator (RO) without analog measurement. Two distributions of delays, in which the contour lines are nearly orthogonal with each other, are derived from the measured frequencies of three kinds of ROs. The Vth can easily be calculated from the two distributions by fitting to...
Microwave-assisted magnetic recording (MAMR) is one of the promising techniques for future high recording density hard disk drives. In this paper, we estimate the effective field gradient in MAMR using the relation between recorded transition length \(\pi a\) and field gradient by dynamic write process simulation. The effective field gradients reach 600 and 700 Oe/nm on each optimum field generation...
Code Division Multiple Access (CDMA) is one of the key technologies supporting our mobile communications today. In this paper, we analytically evaluate the performance of CDMA multi-user demodulator, when we transmit data correlated with each other. For this purpose, we utilize the replica method of statistical physics. Our analysis makes it clear that the correlation within data enables us to enhance...
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