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Final report on key comparison APMP.M.P-K13 in hydraulic gauge pressure from 50 MPa to 500 MPa
Kajikawa, Hiroaki,Kobata, Tokihiko,Yadav, Sanjay,Jian, Wu,Changpan, Tawat,Owen, Neville,Yanhua, Li,Hung, Chen-Chuan,Ginanjar, Gigin,Choi, In-Mook BUREAU INTERNATIONAL DES POIDS ET MESURES 2015 METROLOGIA -BERLIN- Vol.52 No.-
<P>This report describes the results of a key comparison of hydraulic high-pressure standards at nine National Metrology Institutes (NMIs: NMIJ/AIST, NPLI, NMC/A*STAR, NIMT, NMIA, NIM, CMS/ITRI, KIM-LIPI, and KRISS) within the framework of the Asia-Pacific Metrology Programme (APMP) in order to determine their degrees of equivalence in the pressure range from 50 MPa to 500 MPa in gauge mode. The pilot institute was the National Metrology Institute of Japan (NMIJ/AIST). All participating institutes used hydraulic pressure balances as their pressure standards. A set of pressure balance with a free-deformational piston-cylinder assembly was used as the transfer standard. Three piston-cylinder assemblies, only one at a time, were used to complete the measurements in the period from November 2010 to January 2013. Ten participants completed their measurements and reported the pressure-dependent effective areas of the transfer standard at specified pressures with the associated uncertainties. Since one of the participants withdrew its results, the measurement results of the nine participants were finally compared. The results were linked to the CCM.P-K13 reference values through the results of two linking laboratories, NMIJ/AIST and NPLI. The degrees of equivalence were evaluated by the relative deviations of the participants' results from the CCM.P-K13 key comparison reference values, and their associated combined expanded (<I>k</I>=2) uncertainties. The results of all the nine participating NMIs agree with the CCM.P-K13 reference values within their expanded (<I>k</I>=2) uncertainties in the entire pressure range from 50 MPa to 500 MPa. </P><P><B>Main text.</B> To reach the main text of this paper, click on <A HREF='http://www.bipm.org/utils/common/pdf/final_reports/M/P-K13/APMP.M.P-K13.pdf'>Final Report</A>. Note that this text is that which appears in Appendix B of the BIPM key comparison database <A HREF='http://kcdb.bipm.org/'>kcdb.bipm.org/</A>.</P> <P>The final report has been peer-reviewed and approved for publication by CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).</P>
Hiroaki Kajikawa,Kazunori Ide,Tokihiko Kobat 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
A new pressure balance with a controlled-clearance (CC) piston-cylinder has been developed with the aim of reducing the uncertainty of the pressure especially at high pressure. The effective area of the CC piston-cylinder was estimated based on the Heydemann-Welch model. Two parameters in this model, the jacket pressure coefficient and the zero clearance jacket pressure, were determined from characterization experiments. Then, the pressure dependence of the effective area and its uncertainty were calculated. In this paper, the uncertainty of the effective area for a 100 MPa piston-cylinder is evaluated in detail. The resultant uncertainty of the pressure dependence of the effective area was found to be less than 0.7 × 10<SUP>?7</SUP> MPa<SUP>?1</SUP> at pressures higher than 20 MPa.
『 의례 』 와 『 예기 』 에 나타난 고대중국 의례공간의 성격에 관한 연구
카지카와아키히로,김광현 대한건축학회 1999 대한건축학회논문집 Vol.15 No.3
Ttus study deals with the property of ritual space in the ancient chinese ritual books $quot;Yili$quot; and $quot;Liji$quot; In ritual space, direction and all places are bisected, on the principles of Yin and Yang, by life and death, master and guest, whose concept is reflected in the ceremony In ritual space, recognized by the concepts of bisection and harmony, courtyard Ting(庭) and hall Tang(堂) is divided into three space by east-west, and the hierarchy of east and west spaces are balanced with symmetry. These spaces are expression of human ritual, displaying a spatial order adjusted to man In main room Shi(室), conceptual order of space is changed for Guishen(鬼神). This bisection of space is not fixed;they are relative according to ritual ceremony. The purpose of ritual ceremony and bisection is the harmony of human, departed soul and space. The overall ritual space of Shi-Tang-Ting-Men(室-堂-庭-門) is connected with conceptual depth of space and hierarchy
Presynaptic Mechanism Underlying Regulation of Transmitter Release by G Protein Coupled Receptors
Takahashi, Tomoyuki,Kajikawa, Yoshinao,Kimura, Masahiro,Saitoh, Naoto,Tsujimoto, Tetsuhiro The Korean Society of Pharmacology 2004 The Korean Journal of Physiology & Pharmacology Vol.8 No.2
A variety of G protein coupled receptors (GPCRs) are expressed in the presynaptic terminals of central and peripheral synapses and play regulatory roles in transmitter release. The patch-clamp whole-cell recording technique, applied to the calyx of Held presynaptic terminal in brainstem slices of rodents, has made it possible to directly examine intracellular mechanisms underlying the GPCR-mediated presynaptic inhibition. At the calyx of Held, bath-application of agonists for GPCRs such as $GABA_B$ receptors, group III metabotropic glutamate receptors (mGluRs), adenosine $A_1$ receptors, or adrenaline ${\alpha}2$ receptors, attenuate evoked transmitter release via inhibiting voltage-activated $Ca^{2+}$ currents without affecting voltage-activated $K^+$ currents or inwardly rectifying $K^+$ currents. Furthermore, inhibition of voltage-activated $Ca^{2+}$ currents fully explains the magnitude of GPCR-mediated presynaptic inhibition, indicating no essential involvement of exocytotic mechanisms in the downstream of $Ca^{2+}$ influx. Direct loadings of G protein ${\beta}{\gamma}$ subunit $(G{\beta}{\gamma})$ into the calyceal terminal mimic and occlude the inhibitory effect of a GPCR agonist on presynaptic $Ca^{2+}$ currents $(Ip_{Ca})$, suggesting that $G{\beta}{\gamma}$ mediates presynaptic inhibition by GPCRs. Among presynaptic GPCRs glutamate and adenosine autoreceptors play regulatory roles in transmitter release during early postnatal period when the release probability (p) is high, but these functions are lost concomitantly with a decrease in p during postnatal development.