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Friction forces play an important role in analysis of robotic contact tasks. In most of related studies, only ??local?? constraint on friction forces imposed by, for example, Coulomb's law is considered. However, when contact forces are indeterminate, such local constraint is not enough to assess possible friction forces appropriately. Although Omata and Nagata derived additional ??global?? constraint...
In this paper, we propose a simple and easy method for robot teaching. It is based on ??teaching-by-showing?? technique with a structured light approach. In this method, the first step of the teaching procedure is the camera and projector calibration. The second step is a demonstration of manipulation of an object by a human operator in front of the robot with random pattern projection. The third...
This paper describes a method to enhance the load frequency control in a power system with distributed generations (DG). In this paper, a power storage system is used with photovoltaic generation and wind power generation. The microgrid system at Aichi Institute of Technology in Japan is used as a simulation model. For each simulation, which was carried out by using a power transmission simulator,...
This paper describes the flywheel storage system uses for the smoothing of power variation of photovoltaic generation. Since it is dependent taking the power generation energy as energy of the sun, the power variation of photovoltaic generation is very big. Therefore, frequency variation and voltage variation, when the photovoltaic generation linked the power system. And, there is a problem of the...
In recent years, a lot of research has been conducted into watermarking for the purpose of protecting the copyright of a variety of electronic content. Very recently, watermarking methods that resist analog conversion, such as that for printing, have been studied and systems have been proposed that provide instructions for converting from analog to digital data, such as those for mobile telephones...
We present the first measurement of photoproduction of J/ψ and of two-photon production of high-mass e+e− pairs in electromagnetic (or ultra-peripheral) nucleus–nucleus interactions, using Au+Au data at sNN=200 GeV. The events are tagged with forward neutrons emitted following Coulomb excitation of one or both Au ⋆ nuclei. The event sample consists of 28 events with me+e−>2 GeV/c2 with...
This paper proposes a simple series form formula of the bit error rate (BER) for DBPSK/OFDM signals under time selective nonlinear fading channels. The proposed approach derives the theoretical BER in the presence of non-linear distortion and time selective fading effects. Since the BER is represented by the simple series form formula, the proposed approach frees us from the time-consuming computer...
Security engineering has some features that are intrinsically different from software (reliability) engineering. Traditional software engineering environments are not adequate and effective for designing, developing, managing, and maintaining secure software systems. This paper presents our development of ISEE, an information security engineering environment we are developing, that integrates various...
We propose a widely-variable optical attenuator for large-core multimode fibers (MMFs), using a free-space optics composed of lenses, a right-angle prism, a linearly graded density filter, and an electrostatically driven MEMS micromirror. The VOA design has an advantage in fast response, due to the small MEMS mirror located at the focal point of the focus lens.
A back-end-of-line (BEOL) MEMS platform for a compact, high-precision pressure sensor was developed. A CMOS-LSI-integrated MEMS pressure-sensor chip (with a size of 0.72 mm2) was fabricated on the platform. The sensor provides both high accuracy and accommodates miniaturization. Its sensitivity offers design flexibility simply by changing the size of its MEMS capacitors. The pressure sensor is thus...
Microelectromechanical systems (MEMS) vibratory gyroscopes are used in a wide range of applications. Gyroscopes which have long-term stability and high-reliability even when they are used in harsh environments such as in a wide range of temperatures will be useful for automotive systems and robotics applications. We report a deformation-robust gyroscope, which has three sets of symmetrically arranged...
One-dimensional movable structures (motion sensors) made from a metal silicide (WSi) core were successfully encapsulated inside a cavity in an interlayer dielectric (SiO2) covered by another metallic layer. The latter half of the fabrication process is the same as to that for the pressure sensor that we previously reported [1]; thus, both sensors can be fabricated simultaneously. As is the case with...
This paper presents a new model of software life cycle processes for consistent design, development, management, maintenance, and abolition of secure information systems. The model clearly specifies tasks for engineering security facilities, standards underlying the tasks, and a regular sequence of the tasks. We defined the model according to ISO/IEC 12207 and other ISO standards related to security...
In this research, it proposes the Hi-Tc superconducting levitation synchronous motor by using an outer field reversal about the levitation body. This levitation body is a permanent magnet magnetized in the thickness direction. The multipole field is given to outer by making this permanent magnet adsorb larger than the external radius of the magnet more sectorial magnetic material plate. The levitation...
In this research, it proposes the development of High-Tc Superconducting Levitation compact flywheel. The permanent magnet magnetized in the thickness direction where the sectorial magnetic material plate is adsorbed creates the multipole field outside of the magnet. The levitation body achieved the stable rotation without the control by giving the driving force from the axial direction to the multipole...
This paper presents a requirement analysis, design, and implementation of ISEE: an information security engineering environment. ISEE integrates various tools and functions for supporting continuous and consistent design, development, management, maintenance, and abolition of security facilities of information systems with high security requirements, and forces users to perform their tasks according...
Purpose: Our aim was to study whether transcranial direct current stimulation (tDCS) over premotor cortex (PM) can modify the excitability of the ipsilateral primary motor (M1) and somatosensory (S1) cortices via cortico-cortical connectivity. Methods: Ten subjects received, anodal, cathodal and sham tDCS (1mA) over left PM for 15min. PM was determined to be 2cm anterior and 3cm medial to the hotspot...
Dominant rhythm in electroencephalographic (EEG) records is seen at the posterior to occipital region as a primary component of background activity during waking state with closed eyes and is decreased or disappeared by the exogenous factors such as visual stimuli to eyes and so on. Visual evoked potential (VEP) can also be seen in EEG at the posterior to occipital regions during photic stimulation...
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