Sökning: "Overload Protection"

Visar resultat 1 - 5 av 9 avhandlingar innehållade orden Overload Protection.

  1. 1. Multiple Aspects of Dynamic Rating in the Power System

    Författare :Seyede Fatemeh Hajeforosh; Math Bollen; Sarah Rönnberg; Alfredo Vaccaro; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Dynamic rating; Transmission lines; Overload Protection; Stochastic analysis; Hosting capacity; Transformers; Electric Power Engineering; Elkraftteknik;

    Sammanfattning : Increased consumption and increased use of renewable energy make overhead lines and transformers more often congested. Dynamic rating (DR) uses a time-depending maximum permissible current instead of a long-term-fixed rating; it is an effective solution to upgrade the capacity of existing grid assets to minimize this congestion. LÄS MER

  3. 2. Cardiac effects of non-adrenergic inotropic drugs : clinical and experimental studies

    Författare :Birger Axelsson; Michael Haney; Hans Tydén; Anil Gupta; Patrick Wouters; Sven-Erik Ricksten; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Milrinone; levosimendan; vein graft flow; myocardial ischemia; protection; inotropy; diastole; Anaesthesiology; anestesiologi;

    Sammanfattning : Background: Myocardial failure and dysfunction is not uncommon during critical illness and following cardiac surgery. For optimal treatment, a better understanding of the effects of inotropic drugs is needed. In this thesis, two non-adrenergic mediated inotropes, milrinone and levosimendan were studied in different models of myocardial dysfunction. LÄS MER

  4. 3. Active Resource Management in Middleware and Service-oriented Architectures

    Författare :Niklas Widell; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Telekommunikationsteknik; Telecommunication engineering; Intelligent Networks; TINA; web systems; distributed systems; resource allocation; stochastic optimization; simulation models; performance analysis; overload control; load balancing;

    Sammanfattning : In this thesis, we study load balancing and overload control in two distributed architectures: Distributed Object Computing (DOC) systems and Services-oriented Architecture (SOA) systems. While DOC and SOA have differences in terms of implementation, they are similar from a performance viewpoint. LÄS MER

  5. 4. Mechanisms of formation and protection against oxidative DNA damage in vitro and in vivo

    Författare :Peter Svoboda; Ralf Morgenstern; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical Biology; fysikalisk biologi;

    Sammanfattning : Oxidative DNA damage has been linked to cancer and aging as well as other diseases. The aim of this thesis was to study the mechanisms for DNA damage generated in cells or in vitro systems by ionizing radiation or transition metals like iron ions. LÄS MER

  7. 5. Mechanisms of apoptosis in secretory and neuronal cells : role of oxidative stress and calcium overload

    Författare :Maria Ankarcrona; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Apoptosis is a widespread physiological mechanism to regulate tissue homeostasis both during development and in adult organs. However, the cell deletion program can be inappropriately activated or suppressed under pathological conditions. LÄS MER