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In this study, a sensor device based on MEMS technology is proposed to quantitatively monitor the health conditions of plants using biological information (i.e., pH and electrical conductivity (EC)). The proposed sensor device comprises an ion-sensitive field-effect transistor (ISFET)-based sensor (for pH measurement), an EC sensor, and a p-n diode temperature sensor (for adjusting the temperature...
This paper proposes a new structure of the near magnetic field probe. In the case of detecting noise current on printed circuit boards (PCB) using conventional loop type probe, it is necessary to rotate directions of the probe because the probe has no sensitivity to the current perpendicular to the plane of the loop. Therefore, the new type probe with less directional dependence is required to reduce...
This paper describes a highly pure phloem-sap-extraction sensor device that mounts a phloem position-identification sensor. Convenient methods of artificially extracting highly pure phloem sap for quantitative analysis of plant nutrition have yet to be established. To realize direct analysis of nutrition as well as long-term monitoring of its component fluctuation, we propose a novel sensor device...
In this study, a microscale phloem sap extraction sensor device based on MEMS technology is proposed to artificially extract phloem sap and monitor biological information in plant branches. The device consists of electrical resistance sensors to distinguish the positions of vascular bundles (xylem/phloem) and hollow-structured cantilevers with reservoirs for fluid extraction. A prototype of the proposed...
Recently, the applications in biotechnological and medical fields using nonequilbrium atmospheric pressure-plasmas (NEAPPs) have been intensively studied. The inactivation of microorganisms using NEAPPs has been attracted much attention due to the low temperature processing and high speed treatment. We inactivated Penicillium digitatum spores using an atmospheric pressure plasma in gas phase and focused...
To realize high density 3D packaging, various types of interposer including through vias are developed. Although the interposer should have a high wiring density not only horizontally but also vertically, the ability of the conventional interposers to provide high density through vias with a low cost is still quite limited. Copper-filled anodic aluminum oxide has been studied as an alternative interposer...
An Ag(In, Ga)Se2 (AIGS) absorber layer of AIGS solar cell was deposited by a three-stage method and other layers were also fabricated to complete the integrated solar cell structure. The interface between the AIGS film and CdS buffer layer was investigated using bright field scanning transmission electron microscopy (BF-STEM) and high-angle annular dark field (HAADF) scanning transmission electron...
The technical issues about the common mode chokes to design the high-speed signal transmission that are compatible with the electromagnetic noise reduction are discussed. A conventional common mode choke cannot be used for high speed signal transmission because the waveform is degraded by the transmission characteristics at high frequencies. The common mode choke of shielded wire structure is proposed,...
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