Sökning: "off-resonance"

Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet off-resonance.

  1. 1. An impedance approach to passive-active vibration control

    Författare :Jonas Svensson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hybrid passive-active vibration control; Active control; Euler- Bernoulli theory.; Impedance matching;

    Sammanfattning : The complementary advantages of active and passive vibration control have motivated research concerning hybrid configurations. Previous studies have mainly focused on active constrained layers (ACL). However, investigations pointing towards suboptimal performance of ACL have made it interesting to investigate other solutions. LÄS MER

  3. 2. Numerical simulation of the dynamics of a trapped molecular ion

    Författare :Avazeh Hashemloo; Claude Dion; Michael Drewsen; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; diatomic molecular ion; linear Paul trap; rigid rotor; quantum rotational dynamics; wave-packet dynamics; time-dependent Schrödinger equation; stability;

    Sammanfattning : This thesis explores the dynamics of a heteronuclear diatomic molecular ion, possessing a permanent electric dipole moment, µ, which is trapped in a linear Paul trap and can interact with an off-resonance laser field. To build our model we use the rigid-rotor approximation, where the dynamics of the molecular ion are limited to its translational and rotational motions of the center-of-mass. LÄS MER

  4. 3. Origin of life : testing the isotopic resonance hypothesis

    Författare :Xueshu Xie; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The Miller-Urey (MU) experiment provided evidence supporting the abiogenesis theory, and is considered to be the seminal experiment in the context of origin of life. The MU mixture produced in the experiment is assumed to be an essential raw material for life emergence on the primitive Earth or beyond. LÄS MER

  5. 4. Probing Electron Correlation on the Attosecond Timescale

    Författare :Diego Guenot; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysicumarkivet A:2014:Guénot;

    Sammanfattning : This thesis describes how photoemission stimulated by an attosecond pulse train (APT) can be used to extract information on electron correlation in simple quantum systems such as atoms. The emission of the electron by an APT induces a reorganization of the electrons remaining in the ion core. LÄS MER

  7. 5. NMR studies on calcium-induced conformational transitions in calmodulin

    Författare :Johan Evenäs; Biofysikalisk kemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; NMR; conformational exchange; calmodulin; calcium binding; Fysikalisk kemi;

    Sammanfattning : Nuclear magnetic resonance (NMR) spectroscopy was used in order to investigate the relationships between structure, dynamics and calcium binding in the intracellular regulatory protein, calmodulin. Calmodulin consists of two similar domains, each binding two calcium ions with positive cooperativity. LÄS MER