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In promoting automation of workpiece delivery of NC lathe, workpiece gripping devices which are fitted to the tool fitting part of the tool turret unit have been suggested. For opening/closing devices of these workpiece gripping devices, motors, cylinders, and springs were used as conventional driving sources. However, using electric motors and cylinders as driving sources have problems caused by...
This paper proposes a low power Vehicular-to-Machine (V2M) communication system consisting of crowd servers, moving vehicles and low-power fixed roadside devices. In order to save energy of roadside devices, it employs an enhanced ZigBee protocol with fast network association and switching capability. The vehicles can collect information from various types of roadside devices and process them for...
A direct-conversion RF-receiver IC implemented in 65nm CMOS, which has an RF front-end and all-digital differential time-based analog-to-digital converter (TAD) with 4-time-interleave technique for high resolution, is presented. The RF front-end contains passive mixers using wideband gm-cells and switches. When OFDM 16QAM RF signal (input power: −45.4dBm, BW: 20MHz) of 500M, 1.5G, and 2.5GHz is demodulated,...
After the radioactive contamination of agricultural and livestock products caused by the Fukushima Daiichi Nuclear Power Plant accident of March 11, 2011, consumer aversion against purchasing food products from the affected areas has become a major social problem in Japan. We examine how test results for radioactive materials in beef affect consumer valuation of beef produced in no-risk and affected...
The reliability of CSMA/CA vehicle-to-vehicle (V2V) broadcast communication is seriously affected by propagation issues such as propagation loss, fast fading by multipath propagation, and hidden terminal problem. In order to improve the V2V communication reliability, a vehicle-roadside-vehicle relaying communication scheme has been proposed and its effectiveness has been shown. However, relaying increases...
In recent years, we have been confronted with spectrum congestion problems for wireless communication systems. To solve this problem, many techniques have been examined to improve the spectrum efficiency. For instance, it is effective to reduce the adjacent channel interference for increasing the spectrum efficiency. Thus, designing antennas with narrow band or notched band to prevent the interference...
Vehicle Safety Communications (VSC) using Roadside-to-Vehicle (R2V) and Vehicle-to-Vehicle (V2V) communications have attracted much attention for recent years. In Japan, a single 10MHz bandwidth channel on 700MHz band is allocated for VSC. Therefore, R2V and V2V communications have to share the same channel. Additionally, R2V communications require higher quality than V2V communications. Therefore,...
Novel food technologies, such as cloning, have been introduced into the meat production sector; however, their use is not widely supported by many consumers. This study was designed to assess whether Japanese consumers’ attitudes toward consumption of cloned beef (specifically, beef derived from bovine embryo and somatic cell-cloned cattle) would change after they were provided with technological...
Macrovascular disease is the most common cause of morbidity and mortality in diabetic patients. With the increasing numbers of patients with type 2 diabetes, a simple, noninvasive method is needed to detect atherosclerosis. Augmentation represents the difference between the second and first peaks of the central arterial pressure waveform in systole and is a measure of systemic arterial stiffness,...
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