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Pneumatic artificial muscles have unique advantages such as high compliance, high ratio of power to mass, and easy manufacturing. These advantages are different characteristics from electric motors and hydraulic actuators, therefore pneumatic artificial muscles are expected to be applied to new robotic systems such as muscle suits and exploration robots. On the other hand, they require an air compressor,...
Compressors and air hoses limit the mobility of mobile robots and the use of pneumatic actuators such that small pneumatic actuators, which can be driven without compressors, are strongly desired. We have been developing a new hose-free pneumatic actuator based on reversible gas/liquid chemical reactions. This novel pneumatic actuator neither requires compressors nor air hoses for its source of power...
Graphene etching using oxygen neutral beam for high-quality graphene nanoribbon fabrication was investigated. A convenient index of D-band to G-band Raman intensity ratio showed that fewer defects on the edge of the graphene after neutral beam etching were observed than after plasma etching. The results demonstrate that damage-less graphene etching is possible by neutral beam etching due to suppression...
Recently, the need of mobile gas sources and gas controller with portability, silence and high efficiency are strongly required for pneumatic actuators, while conventional air compressors and their control systems are large, heavy, noisy, and low-efficient. This paper proposes a new mobile pressure control system using reversible chemical reactions. This report shows its basic mechanism and experimental...
We developed a practical large-radius neutral beam enhanced CVD with a dimethoxy tetramethy ldisiloxane (DMOTMDS) to form low-k SiOCH film on 8-inch Si wafers. We fabricated extremely non-porous film with an ultra-low k-value of 2.3 and a sufficient modulus (>10 GPa). This particular film did not show any damage from the oxygen plasma and acid or alkali solutions used in the fabrication process...
A secure network is considered to be an important goal of the Future Internet; one way which can be embodied is by having flexible and robust routing functionality with built-in security and trustworthy mechanisms. However, there is a fundamental and important challenge how to determine the trustworthiness to every traffic flow to realize trustable communications. In this paper, we propose a framework...
To fabricate high reliability Micro Electro Mechanical Systems (MEMS) devices, damage-free etching with high aspect three-dimensional (3D) structure is important. Plasma etching resulted in profile anomaly near high aspect 3D structure due to distortion of ion trajectory by distortion of ion sheath and degradation of mechanical property of MEMS devices due to defect generation by UV irradiation, respectively...
Germanium dioxide (GeO2) thin film with a high-quality interface was directly formed by using a damage-free and low-temperature neutral beam oxidation (NBO) process. GeO2 film with little suboxide could be formed even at a low substrate temperature of 300°C because of the extremely low activation energy (Ea) oxidation resulting from bombardment with energetic oxygen neutral-beams of 5 eV. A high-quality...
With Cloud Computing technology occupying the majority of future Internet research and development work, research on deploying and extending existing capabilities onto a newly emerging infrastructure becomes more significant. For example, extending the virtual network provisioning capability onto a Geo-distributed programmable layer-2 networking environment (G-PLaNE) is a novel attempt and is different...
A secure network is considered to be an important goal of the Future Internet; one way this can be embodied is by having flexible and robust routing functionalities with intrinsic security mechanisms. It is also desirable to provide user-centric or service-centric routing capabilities to achieve service-oriented traffic controls as well as trust and policy management for security. Based on these potential...
The acoustic brain has the ability to detect the deviant sounds in the series of homogeneous sounds. The mismatch negativity (MMN) is considered to reflect this ability. Various types of deviations including the omission of sound can elicit MMN. MMN is generated by the comparison process between sound change and the memory trace of the preceding sounds stored in sensory memory. When the trace of sound...
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