Sökning: "temperature stress"

Visar resultat 36 - 40 av 537 avhandlingar innehållade orden temperature stress.

  1. 36. Vibration Frequencies as Status Indicators for Tensegrity Structures

    Författare :Nasseradeen Ashwear; Anders Eriksson; Karl-Gunnar Olsson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Tensegrity; Pre-stress; Vibration; Health monitoring; Buckling; Temperature effect; Vibration health monitoring VHM; Tensegritet; Förspänning; Vibration; Hälsokontroll; Knäckning; Temperatureffekt; Vibrationsbaserad hälsokontroll; Engineering Mechanics; Teknisk mekanik;

    Sammanfattning :  Applications of vibration structural health monitoring (VHM) techniques are increasing rapidly. This is because of the advances in sensors and instrumentation during the last decades. VHM uses the vibration properties to evaluate many civil structures during the design steps, building steps and service life. LÄS MER

  2. 37. Vibration-based Assessment of Tensegrity Structures

    Författare :Nasseradeen Ashwear; Eriksson Anders; Thomas Abrahamsson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Tensegrity; Pre-stress; Vibration; Health monitoring; Buckling; Temperature effect; Vibration health monitoring VHM; Optimization; Engineering Mechanics; Teknisk mekanik;

    Sammanfattning : Vibration structural health monitoring (VHM) uses the vibration properties to evaluate many civil structures during the design steps, building steps and service life.The whole function, expressed by stiffness and frequencies of tensegrity structures are primarily related to the level of pre-stress. LÄS MER

  3. 38. A case-based multi-modal clinical system for stress management

    Författare :Mobyen Uddin Ahmed; Peter Funk; Ning Xiong; Bo von Schéele; Nosrat Shahsavar; Mälardalens högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; stress management; diagnosis and treatment; multi-purpose and multi-modal; Case-based reasoning; textual information retrieval; rule-based reasoning; and fuzzy logic; Computer science; Datavetenskap; Computer Science; datavetenskap;

    Sammanfattning : A difficult issue in stress management is to use biomedical sensor signal in the diagnosis and treatment of stress. Clinicians often make their diagnosis and decision based on manual inspection of physiological signals such as, ECG, heart rate, finger temperature etc. LÄS MER

  4. 39. Constitutive Modelling and Finite Element Analysis of Concrete Structures with Regard to Environmental Influence

    Författare :Ola Dahlblom; Byggnadsmekanik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Finite Elemente Method; Constitutive model; Concrete; Environment; Moisture; Drying; Temperature; Fracture; Fictitious crack model; Smeared Crack; Creep; Shrinkage; Pickett Effect;

    Sammanfattning : A constitutive model for concrete is formulated. Tensile fracture is described using a smeared crack approach where the fracrure energy is considered and the shear stiffneess in the cracked region is gradually reduced as crackling develops. LÄS MER

  5. 40. Assessing environmental and contaminant stressors in a benthic amphipod

    Författare :Therese Jacobson; Brita Sundelin; Tamara Galloway; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Multiple stressors; Reproduction; Temperature; Food; Parasites; Fenarimol; PFOS; TBT; Endocrine disruption; Ecdysteroids; Microsporidia; Microcosm; Crustacea; Amhipoda; Monoporeia affinis; Biology; Biologi; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : Organisms in the aquatic environment encounter numerous stressors throughout their lifespan. Some of them are biotic such as food availability, predators and parasites. Others are abiotic and include shifting salinity and temperature change among others. LÄS MER