5 research outputs found

    Kommunikation zwischen autonomen Agenten

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    Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.Softwareagenten sind Programme, die einen Auftrag autonom und weitgehend selbständig ausführen. Man spricht von mobilen Agenten, wenn diese Programme selbstbestimmt ihre Ausführungsumgebung in einem Netzwerk wechseln können. Die Mobilität der Software impliziert ein neues Programmierparadigma für verteilte Systeme, das die bekannten Interaktionskonzepte herkömmlicher Verteilungsplattformen erweitert. Anwendungen mit mobilen Agenten finden sich in ganz unterschiedlichen Bereichen, wie Netz- und Systemmanagement, elektronische Marktplätze und Logistik

    In vivo effects of prostacyclin on segmental vascular resistances, on myogenic reactivity, and on capillary fluid exchange in cat skeletal muscle

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    OBJECTIVE: To analyze the local circulatory effects of prostacyclin in skeletal muscle. DESIGN: A prospective experimental study. SETTING: A university laboratory. SUBJECTS: Twelve adult cats. INTERVENTIONS: The study was performed on autoperfused, sympathectomized gastrocnemius muscle. MEASUREMENTS AND MAIN RESULTS: Arterial blood flow, total and segmental vascular resistances (arterial vessels of > 25 microns, arterioles of 25 microns. Hydrostatic capillary pressure increased by 1.9 +/- 0.3 mm Hg, causing fluid filtration. The relative fluid filtration was less than that value shown for some other vasodilator drugs (isoprenaline, calcium-channel blockers, thiopental) in this muscle preparation. Capillary filtration coefficient decreased by 25%. Myogenic reactivity was depressed but to a lesser extent than previously observed for other vasodilator mechanisms (muscle exercise, beta-adrenergic receptor stimulation, thiopental infusion, nifedipine infusion). CONCLUSIONS: Prostacyclin is a vasodilator, both on the arterial and venous side, that restricts the increase in hydrostatic capillary pressure. The decrease in capillary filtration coefficient most likely reflects a decrease in capillary permeability, explaining the smaller relative filtration rate. The relatively well-preserved myogenic reactivity may imply a better preserved microvascular flow distribution and peripheral oxygen uptake

    Nordic and North Sea Germanic

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    Birkarlar

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