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  • 1
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Eine Kritik der Methoden, die zur Bestimmung der Aktivität der renalen Pressorfunktion während Hypertension oder Natriumgleichgewicht benutzt wurden, ergibt eine gute Übereinstimmung der Ergebnisse. Es scheint eine umgekehrte Beziehung zwischen den Mengen der renalen pressorischen Substanzen in den Nieren und dem Auftreten der Nephrosklerose zu bestehen. Für die Beteiligung des Renins an der Pathogenese der benignen, renal und hormonell bedingten Hypertension besteht kein Anhaltspunkt.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé L'hypertension artérielle causée par des injections sous-cutanées de rénine de porc disparaît graduellement au cours d'un traitement prolongé. L'élévation du taux d'anti-rénine plasmatique est vraisemblablement responsable de ce retour à la tension normale. Pendant la phase d'hypertension, on a noté une potentiation des effets cardiovasculaires de la rénine et de l'angiotensine, potentiation dont le rôle dans la pathogénèse de l'hypertension reste à déterminer.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé La réponse hypertensive à des injections s.c. d'extrait de rein n'ayant initialement que peu ou pas d'effet sur la tension artérielle s'accroit progressivement avec la durée du traitement.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 26 (1970), S. 1297-1298 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé L'activité de l'angiotensinase neutre contenue dans le suc des cellules hépatiques est inhibée par EDTA ou par PCMS, mais restituée par addition d'ion de calcium ou de composés thioliques. Ces propriétés ressemblent à celles de l'angiotensinase érythrocytaire, mais diffèrent de celles de l'angiotensinase microsomale d'origine rénale laquelle ne nécessite pas la présence de groupes sulfhydryles.
    Type of Medium: Electronic Resource
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  • 5
    Publication Date: 2011-08-18
    Description: A fault model and a system model are necessary to assess the tolerance or resilience of a digital system to lightning-induced transients. It is noted that these models are usually developed separately. A new approach is outlined here for this assessment problem which combines the fault and system models into an overall model. With this approach, referred to as the containment set approach, an assessment of the effects of lightning-induced transients can be made in terms of a state transition matrix. This matrix can be generated by means of fault injection experiments. In addition, certain nonredundancy-oriented design alternatives to the achievement of lightning-induced transient tolerance in digital systems are indicated by the containment set approach.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Format: text
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  • 6
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    In:  Other Sources
    Publication Date: 2019-06-27
    Description: The fault diagnosis capabilities of systems composed of interconnected units capable of testing each other are studied for the case of systems with intermittent faults. A central role is played by the concept of t(i)-fault diagnosability. A system is said to be t(i)-fault diagnosable when it is such that if no more than t(i) units are intermittently faulty then a fault-free unit will never be diagnosed as faulty and the diagnosis at any time is at worst incomplete. Necessary and sufficient conditions for t(i)-fault diagnosability are proved, and bounds for t(i) are established. The conditions are in general more restrictive than those for permanent-fault diagnosability. For intermittent faults there is only one testing strategy (repetitive testing), and consequently only one type of intermittent-fault diagnosable system.
    Keywords: COMPUTER OPERATIONS AND HARDWARE
    Type: IEEE Transactions on Computers; C-27; June 197
    Format: text
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  • 7
    Publication Date: 2019-06-27
    Description: An overview of the intermittent/transient (IT) fault study is presented. An interval survivability evaluation of digital systems for IT faults is discussed along with a method for detecting and diagnosing IT faults in digital systems.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: NASA-CR-153743
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  • 8
    Publication Date: 2019-06-28
    Description: Containment set techniques are applied to 8085 microprocessor controllers so as to transform a typical control system into a slightly modified version, shown to be crashproof: after the departure of the intermittent/transient fault, return to one proper control algorithm is assured, assuming no permanent faults occur.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: NASA-CR-169022 , NAS 1.26:169022
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  • 9
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    In:  Other Sources
    Publication Date: 2019-06-27
    Description: In the present paper, the concept of a hybrid fault situation is introduced, which specifies bounded combinations of permanently faulty and intermittently faulty units in a system. The general class of hybrid fault situations includes, as special cases, the all permanent fault case and the unrestricted intermittent fault case, which have been previously considered with PMC models. An approach compatible with the diagnosis of permanent fault situations is then applied to the diagnosis of hybrid fault situation. The motivation for doing so is the common practice of testing for the presence of intermittent faults in systems by means of repeated applications of tests that are designed for the detection of permanent faults. The testing assignment of PMC models of system is characterized, and interrelationships between the number of intermittently and permanently faulty units that can be diagnosed is established.
    Keywords: COMPUTER OPERATIONS AND HARDWARE
    Type: IEEE Transactions on Computers; C-29; June 198
    Format: text
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  • 10
    Publication Date: 2019-06-28
    Description: The modeling and analysis of transient faults in microprocessor based controllers are discussed. Such controllers typically consist of a microprocessor, read only memory storing and application program, random access memory for data storage, and input/output devices for external communications. The effects of transient faults on the performance of the controller are reviewed. An instruction level perspective of performance is taken which is the basis of a useful high level program state description of the microprocessor controller. A transition matrix is defined which determines the controller's response to transient fault arrivals.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: NASA-CR-165713
    Format: application/pdf
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