Sökning: "optical damages"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden optical damages.

  1. 1. Characterization of domain switching and optical damage properties in ferroelectrics

    Författare :Junji Hirohashi; Fredrik Laurell; Ady Arie; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; quasi-phase matching; ferroelectric domains; stoichiometric LiNbO3; stoichiometric LiTaO3; KTiOPO4; KNbO3; polarization switching; periodic electric field poling; optical damages; Optical physics; Optisk fysik;

    Sammanfattning : Nonlinear optical frequency conversion is one of the most important key techniques in order to obtain lasers with wavelengths targeted for specific applications. In order to realize efficient and tailored lasers, the quasi-phase-matching (QPM) approach using periodically-poled ferroelectric crystals is getting increasingly important. LÄS MER

  2. 2. Deep Learning for Wildfire Progression Monitoring Using SAR and Optical Satellite Image Time Series

    Författare :Puzhao Zhang; Yifang Ban; Lorenzo Burzzone; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Remote Sensing; Deep Learning; Wildfire; Burned Area Mapping; Synthetic Aperture Radar; Change Detection; Segmentation; Optical and Radar Image Analysis; Sentinel-1; Sentinel-2; fjärranalys; djup inlärning; skogsbrand; kartläggning av brända områden; Synthetic Aperture Radar; upptäckt av förändringar; segmentering; analys av optiska och radarbilder; Sentinel-1; Sentinel-2; Geoinformatik; Geoinformatics;

    Sammanfattning : Wildfires have coexisted with human societies for more than 350 million years, always playing an important role in affecting the Earth's surface and climate. Across the globe, wildfires are becoming larger, more frequent, and longer-duration, and tend to be more destructive both in lives lost and economic costs, because of climate change and human activities. LÄS MER

  3. 3. Documentation and Maintenance Planning Model – DoMaP A response to the need for conservation and long-term maintenance of façades of modern multi-apartment buildings Based on case studies in Göteborg in Sweden

    Författare :Pär Meiling; Chalmers tekniska högskola; []
    Nyckelord :HUMANIORA; HUMANITIES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; public housing companies; façade-materials; Sustainable integrated conservation; long-term maintenance operations; deterioration; optical measurement techniques; generic multi-apartment buildings;

    Sammanfattning : Sustainable maintenance and renovation of façades on generic multi-apartment buildings from late 1950s through 70s constitute vital challenges for the housing companies owned by City of Göteborg. These challenges comprise a wide array of issues, such as deterioration and damages in occurring façade materials, status assessments, technical improvements, reduction of energy consumption, and up-keeping of housing qualities and tenants attraction. LÄS MER

  4. 4. Wear of high strength steels and ductile iron and its effect on fatigue performance

    Författare :Abdulbaset Mussa; Pavel Krakhmalev; Jens Bergström; Bojan Podgornic; Karlstads universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sliding wear; severe plastic deformation; delamination; WEL and synergy of wear and fatigue; Materialteknik; Materials Engineering;

    Sammanfattning : Machinery components used in demanding applications are required to transmit or carry mechanical loads under severe loading conditions. They are subjected to cyclic loading and repeated sliding contact that in many cases result in a premature failure of components. LÄS MER

  5. 5. Traditional lime mortar and plaster : Reconstruction with emphasis on durability

    Författare :Kristin Balksten; Tor Broström; Britt-Marie Steenari; Thorborg Konow von; Chalmers Tekniska Högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; lime plaster; lime mortar; masonry; craftsmanship; pore structure; frost resistance; historic mortar; Conservation HGO ; Kulturvård HGO ;

    Sammanfattning : Lime mortar and plaster have been investigated with the aim to improve the knowledge on how to make them as durable as before the cement technology was developed. The background was the durability problems experienced for newly produced lime plaster on the medieval churches on the island of Gotland, Sweden. LÄS MER