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Variable speed control of weight stacks in 3 kN force standard machine
Toshiyuki Hayashi,Yoshihisa Katase,Hiroshi Maejima,Yukio Yamaguchi,Kazunaga Ueda 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In calibrations of force measuring instruments using dead-weight type force standard machines, increasing the moving speed of dead-weights in linkage-weight stacks generally improves working efficiency but makes the calibration uncertainty worse due to oscillation of the weights. This conflict can be solved by introducing variable speed control of the linkage-weight stacks to drive the weights quickly in most loading/unloading processes and reduce the speed only when the moving weight comes close to a neighboring weight. Thus, variable speed control reduces the calibration time and prevents weight oscillation. The 3 kN dead-weight type force standard machine of NMIJ has already been equipped with AC servo motors for weight actuation, and variable speed control can be realized by modifying the existing control software. This report describes the design and results of the modification.
SUZUKI, Toshiyuki,SAKUMOTO, Ryosuke,HAYASHI, Ken-Go,OGISO, Takatoshi,KUNII, Hiroki,SHIROZU, Takahiro,KIM, Sung-Woo,BAI, Hanako,KAWAHARA, Manabu,KIMURA, Koji,TAKAHASHI, Masashi 家畜繁殖硏究所 2018 Journal of Reproduction and Development Vol.64 No.6
<P>Interferon-tau (IFNT), a type I interferon (IFN), is known as pregnancy recognition signaling molecule secreted from the ruminant conceptus during the preimplantation period. Type I IFNs, such as IFN-alpha and IFN-beta, are known to activate cell-death pathways as well as induce apoptosis. In cows, induction of apoptosis with DNA fragmentation is induced by IFNT in cultured bovine endometrial epithelial cells. However, the status of cell-death pathways in the bovine endometrium during the preimplantation period still remains unclear. In the present study, we investigated the different cell-death pathways, including apoptosis, pyroptosis, and autophagy, in uterine tissue obtained from pregnant cows and <I>in vitro</I> cultured endometrial epithelial cells with IFNT stimulation. The expression of <I>CASP7</I>, <I>8,</I> and <I>FADD</I> (apoptosis-related genes) was significantly higher in pregnant day 18 uterine tissue in comparison to non-pregnant day 18 tissue. The expression of <I>CASP4</I>, <I>11,</I> and <I>NLRP3</I> (pyroptosis-related genes) was significantly higher in the pregnant uterus in comparison to non-pregnant uterus. In contrast, autophagy-related genes were not affected by pregnancy. We also investigated the effect of IFNT on the expression of cell-death pathway-related genes, as well as DNA fragmentation in cultured endometrial epithelial cells. Similar to its effects in pregnant uterine tissue, IFNT affected the increase of apoptosis-related (<I>CASP8</I>) and pyroptosis-related genes (<I>CASP11</I>), but did not affect autophagy-related gene expression. IFNT also increased γH2AX-positive cells, which is a marker of DNA fragmentation. These results suggest that apoptosis- and pyroptosis-related genes are induced by IFNT in the pregnant bovine endometrial epithelial cells.</P>
4-DIMENSIONAL DIGITAL UNIVERSE PROJECT
KOKUBO EUCHIRO,HAYASHI MITSURU,KATO TSUNEHIKO,TAKEDA TAKAAKI,KAIFU NORIO,MIYAMA SHOKEN,MIURA HITOSHI,TAKAHEI TOSHIYUKI The Korean Astronomical Society 2005 Journal of The Korean Astronomical Society Vol.38 No.2
We have developed the four-dimensional digital universe theater at which we can visualize the observational data and theoretical models of astronomical objects stereoscopically. The astronomical objects cover all scales of the universe from the solar system to the large-scale structure of the universe. We have also produced the three-dimensional movies of various astronomical processes based on the results of computer simulations. We plan to distribute all the products of this project through the internet.
Karthik Paneer Selvam,Taichi Nagahata,Kosuke Kato,Mayuko Koreishi,Toshiyuki Nakamura,Yoshimasa Nakamura,Takeshi Nishikawa,Ayano Satoh,Yasuhiko Hayashi 한국생체재료학회 2020 생체재료학회지 Vol.24 No.4
Background: Conductive sheets of cellulose and carbon nanomaterials and its human skin applications are an interesting research aspect as they have potential for applications for skin compatibility. Hence it is needed to explore the effects and shed light on these applications. Method: To fabricate wearable, portable, flexible, lightweight, inexpensive, and biocompatible composite materials, carbon nanohorns (CNHs) and hydroxyethylcellulose (HEC) were used as precursors to prepare CNH-HEC (Cnh-cel) composite sheets. Cnh-cel sheets were prepared with different loading concentrations of CNHs (10, 20 50,100 mg) in 200 mg cellulose. To fabricate the bio-compatible sheets, a pristine composite of CNHs and HEC was prepared without any pretreatment of the materials. Results: The obtained sheets possess a conductivity of 1.83 × 10− 10 S/m and bio-compatible with human skin. Analysis for skin-compatibility was performed for Cnh-cel sheets by h-CLAT in vitro skin sensitization tests to evaluate the activation of THP-1 cells. It was found that THP-1 cells were not activated by Cnh-cel; hence Cnh-cel is a safe biomaterial for human skin. It was also found that the composite allowed only a maximum loading of 100 mg to retain the consistent geometry of free-standing sheets of < 100 μm thickness. Since CNHs have a unique arrangement of aggregates (dahlia structure), the composite is homogeneous, as verified by transmission electron microscopy (TEM) and, scanning electron microscopy (SEM), and other functional properties investigated by Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR), conductivity measurement, tensile strength measurement, and skin sensitization. Conclusion: It can be concluded that cellulose and CNHs sheets are conductive and compatible to human skin applications.