Sökning: "structural damage"

Visar resultat 1 - 5 av 303 avhandlingar innehållade orden structural damage.

  1. 1. Structural Health Monitoring of Bridges : Data-based damage detection method using Machine Learning

    Författare :Ana C. Neves; Raid Karoumi; Elsa Caetano; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Health Monitoring; damage detection; Machine Learning; data-based methods; Artificial Neural Networks; Value of Information; Structural Engineering and Bridges; Bro- och stålbyggnad;

    Sammanfattning : Civil engineering structures built according to modern codes are designed for a service life of normally more than 100 years. At the same time, there is a growing pressure to keep existing aged structures in service despite the fact that they have reached the original designed lifetime, with bridges being a good example of this. LÄS MER

  3. 2. Structural Health Monitoring of Bridges : Model-free damage detection method using Machine Learning

    Författare :Cláudia Neves; Raid Karoumi; John Leander; Ignacio Gonzalez; Eleni Chatzi; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Health Monitoring; Machine Learning; Damage detection; Model-free based method; Artificial Neural Networks; Gaussian Process; Cost optimization; Byggvetenskap; Civil and Architectural Engineering;

    Sammanfattning : This is probably the most appropriate time for the development of robust and reliable structural damage detection systems as aging civil engineering structures, such as bridges, are being used past their life expectancy and beyond their original design loads. Often, when a significant damage to the structure is discovered, the deterioration has already progressed far and required repair is substantial. LÄS MER

  4. 3. First Principles Calculations of Electron Transport and Structural Damage by Intense Irradiation

    Författare :Carlos Ortiz; Olle Eriksson; Mattias Klintenberg; Richard A. London; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Condense matter theory; electronic structure; quasiparticles; GW theory; molecular dynamics; Boltzmann transport; electron transport; impact ionization; structural damage; dielectric response; structural biology; radiation detectors; scintillators; positron emission tommography; Electronic structure; Elektronstruktur; Semiconductor physics; Halvledarfysik; Biological physics; Biologisk fysik; Critical phenomena phase transitions ; Kritiska fenomen fasövergångar ; Functional materials; Funktionella material; Materiefysik; Physics of Matter;

    Sammanfattning : First principle electronic structure theory is used to describe the effect of crystal binding on radiation detectors, electron transport properties, and structural damage induced by intense irradiation. A large database containing general electronic structure results to which data mining algorithms can be applied in the search for new functional materials, a case study is presented for scintillator detector materials. LÄS MER

  5. 4. Molecular mechanisms underlying the activation of ALC1 nucleosome remodeling

    Författare :Luka Bacic; Sebastian Deindl; Stefan D. Knight; Lari Lehtiö; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ALC1; CHD1L; nucleosome; ADP-ribosylation; chromatin; remodeling; PARP1; HPF1; DNA damage; Biology with specialization in Structural Biology; Biologi med inriktning mot strukturbiologi; Biology with specialization in Structural Biology; Biologi med inriktning mot strukturbiologi; Biology with specialization in Structural Biology; Biologi med inriktning mot strukturbiologi;

    Sammanfattning : Packaging DNA into chromatin represses essential DNA-based processes, such as transcription, DNA replication, and repair. To change the accessibility of DNA, cells have evolved a set of enzymes referred to as chromatin remodelers that act on the basic repeat unit of chromatin,  the nucleosome. LÄS MER

  7. 5. Allosteric control of ALC1-catalyzed nucleosome remodeling

    Författare :Laura C. Lehmann; Sebastian Deindl; Stefan D. Knight; Felix Müller-Planitz; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; ALC1; CHD1L; ATP-dependent chromatin remodeling; nucleosome; allosteric regulation; autoinhibition; macro domain; PARP; ADP-ribosylation; DNA damage; acidic patch; Biology with specialization in Molecular Biology; Biologi med inriktning mot molekylärbiologi; Biology with specialization in Structural Biology; Biologi med inriktning mot strukturbiologi;

    Sammanfattning : The genetic information of eukaryotic cells is packaged inside the nucleus as chromatin. This packaging restricts access to the DNA and therefore represents a barrier for processes such as DNA replication, repair, and gene expression. LÄS MER