33 research outputs found

    Inter-application communication during LHD consecutive short pulse discharge experiment

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    LHD short pulse experiments are executed every three minutes. After the end of the discharge, the scientists must collect, analyze, visualize the last acquired data of the discharge, and prepare for the next discharge. From the beginning, the computer environment of the LHD (Large Helical Device) experiment has been built as a network distributed system, and various computers have been used for data acquisition or physical analysis. When one program is finished on one computer, that computer must send the results in order to the other computers to run programs. Smooth communication is required in order to finish all the tasks before the next discharge. To exchange the information among the applications running on the different computers, the authors have tried various methods, such as a commercial software to share the memory over the network, simple network file sharing method, IP multicast, web interfaces, and others. The purpose of this paper is to share our experiences of trial and error to build the network distributed systems for the consecutive plasma discharge experiments

    Integrated radiation monitoring and interlock system for the LHD deuterium experiments

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    The Large Helical Device (LHD) successfully started the deuterium experiment in March 2017, in which further plasma performance improvement is envisaged to provide a firm basis for the helical reactor design. Some major upgrades of facilities have been made for safe and productive deuterium experiments. For radiation safety, the tritium removal system, the integrated radiation monitoring system, and the access control system have been newly installed. Each system has new interlock signals that will prevent any unsafe plasma operation or plant condition. Major interlock extensions have been implemented as a part of the integrated radiation monitoring system, which also has an inter-connection to the LHD central operation and control system. The radiation monitoring system RMSAFE (Radiation Monitoring System Applicable to Fusion Experiments) is already operating for monitoring Ī³(X)-rays in LHD. Some neutron measurements have been additionally applied for the deuterium experiments. The LHD data acquisition system LABCOM can acquire and process 24ā€Æh every day continuous data streams. Since Ī³(X)-ray and neutron measurements require higher availability, the sensors, controllers, data acquisition computers, network connections, and visualization servers have been designed to be duplicated or multiplexed for redundancy. The radiation monitoring displays in the LHD control room have been carefully designed to have excellent visual recognition, and to make users immediately aware of several alerts regarding the dose limits. The radiation safety web pages have been also upgraded to always show both dose rates of Ī³(X)-rays and neutrons in real time

    Endothelin Type B Receptorā€“Induced Sustained Ca2+ Influx Involves Gq/11/Phospholipase Cā€“Independent, p38 Mitogen-Activated Protein Kinaseā€“Dependent Activation of Na+/H+ Exchanger

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    The mechanism for sustained Ca2+ influx activated by G protein-coupled receptors was examined. In Chinese hamster ovary cells expressing recombinant human endothelin type B receptor (ETBR) and endogenous P2Y receptor (P2Y-R), endothelin-1 elicited a sustained Ca2+ influx depending on Gq/11 protein, phospholipase C (PLC), Na+/H+ exchanger (NHE) and p38 mitogen-activated protein kinase (p38MAPK), whereas P2Y-R-induced sustained Ca2+ influx was negligible. Functional study showed that NHE activation by ETBR was mediated via p38MAPK but not Gq/11/PLC, while that by P2Y-R involves only Gq/11/PLC/p38MAPK. These results suggest that Gq/11/PLC-independent NHE activation via p38MAPK plays an important role in ETBR-mediated sustained Ca2+ influx

    Title page. Adenylate cyclase-cAMP-protein kinase A signaling pathway inhibits endothelin type A receptor-operated Ca 2+ entry mediated via TRPC6 channels. Running title page. Running title: PKA-mediated inhibition of ET A R-induced Ca 2+ entry via TRPC6

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    The number of text pages: 30 The number of tables: 1 The number of figures: 6 The number of supplemental figures: 4 The number of references: 34 The number of words in the Abstract: 248 The number of words in the Introduction: 718 The number of words in the Discussion: 1,39

    Facile Multiple Alkylations of C<sub>60</sub> Fullerene

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    The reduction of fullerene (C60) with sodium dispersion in the presence of an excess amount of dipropyl sulfate was found to yield highly propylated fullerene, C60(nC3H7)n (max. n = 24), and C60(nC3H7)20 was predominantly generated as determined by mass spectroscopy

    Endothelin Type B Receptorā€“Induced Sustained Ca2+ Influx Involves Gq/11/Phospholipase Cā€“Independent, p38 Mitogen-Activated Protein Kinaseā€“Dependent Activation of Na+/H+ Exchanger

    No full text
    The mechanism for sustained Ca2+ influx activated by G protein-coupled receptors was examined. In Chinese hamster ovary cells expressing recombinant human endothelin type B receptor (ETBR) and endogenous P2Y receptor (P2Y-R), endothelin-1 elicited a sustained Ca2+ influx depending on Gq/11 protein, phospholipase C (PLC), Na+/H+ exchanger (NHE) and p38 mitogen-activated protein kinase (p38MAPK), whereas P2Y-R-induced sustained Ca2+ influx was negligible. Functional study showed that NHE activation by ETBR was mediated via p38MAPK but not Gq/11/PLC, while that by P2Y-R involves only Gq/11/PLC/p38MAPK. These results suggest that Gq/11/PLC-independent NHE activation via p38MAPK plays an important role in ETBR-mediated sustained Ca2+ influx
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