Search for dissertations about: "reliability worth"

Showing result 1 - 5 of 9 swedish dissertations containing the words reliability worth.

2. 1. Assessment of Interruption Costs in Electric Power Systems using the Weibull-Markov Mode

   Author : Jasper van Casteren; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; semi-Markov model; interruption cost; power system reliability; customer damage function; duration distribution; reliability worth;

   Abstract : Modern competitive electricity markets do not ask for power systems with the highest possible technical perfection, but for systems with the highest possible economic efficiency. Higher efficiency can only be reached when accurate and flexible analysis tools are used. READ MORE

4. 2. Reliability-Based Assessment and Optimization of High-Speed Railway Bridges

   Author : Reza Allahvirdizadeh; Raid Karoumi; Andréas Andersson; Daniel Straub; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High-speed railway bridges; Bridge dynamics; Running safety; Passenger comfort; Structural reliability; Meta-models; Surrogate models; Adaptive sampling; Reliability-based design optimization; Höghastighetsjärnvägsbroar; Brodynamik; Trafiksäkerhet; Passagerarkomfort; Konstruktioners tillförlitlighet; Metamodeller; Surrogatmodeller; Adaptiv sampling; Tillförlitlighetsbaserad designoptimering; Structural Engineering and Bridges; Bro- och stålbyggnad;

   Abstract : Increasing the operational speed of trains has attracted a lot of interest in the last decades and has brought new challenges, especially in terms of infrastructure design methodology, as it may induce excessive vibrations. Such demands can damage bridges, which in turn increases maintenance costs, endangers the safety of passing trains and disrupts passenger comfort. READ MORE

5. 3. Conceptual runoff models - fiction or representation of reality?

   Author : Jan Seibert; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Validation; conceptual runoff models; calibration; uncertainty; TOPMODEL; HBVmodel; groundwater levels; spatial distribution; topography; Geovetenskap; Earth sciences; Geovetenskap; Hydrology; hydrologi;

   Abstract : Available observations are often not sufficient as a basis for decision making in water management. Conceptual runoff models are frequently used as tools for a wide range of tasks to compensate the lack of measurements, e.g., to extend runoff series, compute design floods and predict the leakage of nutrients or the effects of a climatic change. READ MORE

6. 4. Striving for self-esteem : Conceptualizations and role in burnout

   Author : Victoria Blom; Maarit Johnson; Petra Lindfors; Martin Bäckström; Stockholms universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; self-esteem; contingent self-esteem; burnout; stressors; gender; stress; work; competence; performance; Psychology; Psykologi; psykologi; Psychology;

   Abstract : When self-esteem is dependent on competence individuals invest a great deal of effort in their accomplishments in order to validate themselves. The aim of the present thesis was to develop a theoretically sound and valid concept and measure of contingent self-esteem dependent on competence, and examine its vulnerable implications and role in burnout. READ MORE

7. 5. An assessment of operational consequences of failures to support aircraft scheduled maintenance program development

   Author : Alireza Ahmadi; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Drift och underhållsteknik; Operation and Maintenance;

   Abstract : A majority of the direct and indirect maintenance costs in the life cycle of aircraft stems from the consequences of decisions taken during the initial maintenance program development. In particular, the preventive and corrective maintenance requirements, which greatly influence both the system availability and life cycle cost, need to be defined in order to perform only those preventive actions that are absolutely necessary and costeffective. READ MORE