Sökning: "directional emission"

Visar resultat 1 - 5 av 11 avhandlingar innehållade orden directional emission.

  1. 1. Coherent Plasmon-Plasmon and Plasmon-Exciton Interactions at the Nanoscale

    Författare :Martin Wersäll; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; directional emission; coherent interactions; strong coupling; localized surface plasmon resonances;

    Sammanfattning : Noble metallic nanoparticles which supports localized surface plasmon resonances, offers a variety of potential scientific as well as industrial applications. Due to a remarkable ability to confine light at nanoscale dimensions, far below the optical diffraction limit, together with an ability to detect minute changes in the local environment plasmonic nanoparticles have paved routes towards several new and intriguing techniques, promising for future applications in areas such as molecular sensing and quantum optics. LÄS MER

  3. 2. Thermal physics of asteroids

    Författare :Johan S. V. Lagerros; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Astronomy; asteroids; infrared emission; thermophysical models; Astronomi; Astronomy and astrophysics; Astronomi och astrofysik; astronomi; Astronomy;

    Sammanfattning : The thermal infrared and microwave emission from asteroids have many applications. Fundamental physical properties can be investigated, which have implications for the geophysical evolution of the asteroids, and the early history of the solar system.A new thermophysical model of asteroids is presented. LÄS MER

  4. 3. Sulphur Regulations for Shipping – Why a Regional Approach?: Scientific and Economic Arguments in IMO Documents 1988-1997

    Författare :Erik Svensson; Chalmers University of Technology; []
    Nyckelord :NATURVETENSKAP; SAMHÄLLSVETENSKAP; NATURAL SCIENCES; SOCIAL SCIENCES; costs; framing; shipping; SECA; distribution; environmental; policy environment; international; MARPOL; conceptual lens; IMO; Annex VI; regional approach; economic interests; directional problem; benefits; policy-making; SOx; science;

    Sammanfattning : Some environmental issues for shipping are regulated globally with uniform standards and others with stricter regulations in specific areas. This thesis aims to provide an understanding of why a regional approach was chosen with SOx Emission Control Areas (SECAs) as the main form of control of sulphur oxide emissions from international shipping, with explanations based on documents from negotiations within the International Maritime Organization (IMO) during 1988-1997. LÄS MER

  5. 4. Essays on Productive Efficiency, Shadow Prices, and Human Capital

    Författare :Per-Olov Marklund; Thomas Aronsson; Chuan-Zhong Li; Umeå universitet; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economics; directional output distance function; Porter hypothesis; Burden-Sharing Agreement; Producer Responsibility Ordinance; Output of the educational sector; Nationalekonomi; Economics; Nationalekonomi; nationalekonomi; Economics;

    Sammanfattning : This thesis consists of five papers, four of them basically concerning environmental issues, while the fifth paper addresses the issue of measuring output from the educational sector. The first paper starts from the fact that industrial activity causes environmental damage. LÄS MER

  7. 5. Suprathermal Electrons and Alfvén Eigenmodes in Sawtoothing Tokamak Plasmas

    Författare :Patrik Sandquist; Chalmers University of Technology; []
    Nyckelord :magnetohydrodynamic spectroscopy; Alfvén cascade; suprathermal electron; thermonuclear instability; Fusion plasma physics; fast electron bremsstrahlung; toroidal Alfvén eigenmode;

    Sammanfattning : In the Joint European Torus (JET) tokamak, monster sawtooth stabilisation by ICRH-accelerated hot ions is lost if plasma density falls below a certain density threshold, or if energetic-ion driven Alfvén eigenmodes inside q = 1 occur. In the first case, a transition away from long periodmonster sawteeth to a regime with shorter period, chaotic sawteeth (grassy sawteeth) takes place, while in the second case the monster sawtooth crash happens, degrading plasma confinement. LÄS MER