Sökning: "extremes"

Visar resultat 1 - 5 av 85 avhandlingar innehållade ordet extremes.

  1. 1. Thriving in extremes : Local adaptation of grasses (Poaceae) to geothermally heated soils on a subarctic island

    Författare :Jan-Niklas Nuppenau; Aelys M. Humphreys; Catarina Rydin; Johan Ehrlén; Alessandro Chiarucci; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; abiotic stress; Agrostis; cold; colonization history; common garden; extreme environments; Festuca; frost; ice encasement; Iceland; heat; overwintering; phenology; plastome; snown; thermal tolerance; Plant Systematics; växtsystematik;

    Sammanfattning : Temperature is one of the most decisive parameters when it comes to determining characteristics and distributions of life worldwide. For plants, as sessile organisms, it is particularly important to be able to deal with the temperatures they are exposed to at a given location. LÄS MER

  3. 2. Designing for Extremes

    Författare :Olga Bannova; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HUMANIORA; HUMANITIES; Architect; Human Factors; Engineering; Engineer; Multidisciplinary and Trans-disciplinary Design and Planning.; Extreme environments; Architecture; Design Planning;

    Sammanfattning : The starting point of this research is based on personal experience in research and design for extreme environments, including orbital and lunar planetary facilities, disaster shelters, polar stations and offshore surface and submersible habitats. This work reflects on related to research problem technical papers, discussions with professionals about their work experience with projects in extreme conditions, and students' workshops debating strategies to form sustainable behavior and design practices. LÄS MER

  4. 3. Seeking the faint extremes : Detection and characterisation of extragalactic soft-spectrum gamma-ray sources and exploring methods to enhance their detection with machine learning in the 50 GeV-50 TeV energy range

    Författare :Tomas Bylund; Yvonne Becherini; Gilles Henri; Linnéuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; GeV gamma-rays; TeV gamma-rays; AGN; blazar; deep learning; observational high-energy astronomy; Astroparticle Physics; Astropartikelfysik;

    Sammanfattning : This thesis deals with an observational study of Blazars, strong gamma-ray sources with Very High Energies (VHE) located far outside our Galaxy. Blazars are a class of galaxies that contain a supermassive black hole that is actively consuming large quantities of matter, a process that results in the liberation of tremendous amounts of energy that then powers the emission of huge bulks of charged particles that get accelerated almost to the speed of light. LÄS MER

  5. 4. Wintertime compound extremes in Europe and North America : from dynamics to predictability

    Författare :Richard Leeding; Gabriele Messori; Jacopo Riboldi; Deliang Chen; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cold Spells; Climate Extremes; Extratropical Cyclones; North Atlantic; North America; Europe; Meteorologi; Meteorology;

    Sammanfattning : This thesis examines the co-occurrence of wintertime low temperature extremes (cold spells) over North America and wet or windy extremes over Europe. Prolonged (≅ 5 days) North American cold spells can be associated with both upstream and downstream anomalous large-scale atmospheric flows, the latter modulating extreme weather occurrences over Europe. LÄS MER

  7. 5. L’émergence de la compétence collective en contextes extrêmes : le cas des équipes de secours en montagne

    Författare :Virginie Fernandez; Yvonne Giordano; Sabrina Loufrani-Fedida; France Nice Université Côte d'Azur; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Collective competence; extreme contexts; qualitative study; Contextes extrêmes; Compétence collective; företagsekonomi; Business Studies;

    Sammanfattning : Risky, emergency or disruptive contexts are all qualifiers used for so-called "extreme" contexts that are usually characterized by uncertainty, time pressure and the presence of risks and / or dangers. Many authors and practitioners believe that they have now become the new normal for many organizations. LÄS MER