Sökning: "Secondary Ion"

Visar resultat 1 - 5 av 186 avhandlingar innehållade orden Secondary Ion.

  1. 1. Security-Aware Design of Cyber-Physical Systems for Control Applications

    Författare :Rouhollah Mahfouzi; Petru Ion Eles; Zebo Peng; Samarjit Chakraborty; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : With cyber-physical systems opening to the outside world, security can no longer be considered a secondary issue. In this work, we focus on security threats to control applications in cyber-physical systems. LÄS MER

  3. 2. Secondary absorbed dose distributions and radiation quality in light ion therapy

    Författare :Martha Hultqvist; Irena Gudowska; Tatsuhiko Sato; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; secondary doses; light ion therapy; radiation quality; Monte Carlo simulation; Medical Radiation Physics; medicinsk strålningsfysik;

    Sammanfattning : Radiotherapy with light ions offers the possibility of achieving a dose distribution which is highly conformed to the target volume while sparing normal tissues. For ions heavier than protons, an additional advantage is the increased Relative Biological Effectiveness (RBE) as compared to conventional photon and electron beams. LÄS MER

  4. 3. Modeling of voltage-gated ion channels

    Författare :Pär Bjelkmar; Erik Lindahl; Toby W. Allen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Molecular modeling; Molecular dynamics; Voltage-gating; Ion channels; Protein structure prediction; Chemistry; Kemi; biokemi; inriktning teoretisk kemi; Biochemistry with Emphasis on Theoretical Chemistry;

    Sammanfattning : The recent determination of several crystal structures of voltage-gated ion channels has catalyzed computational efforts of studying these remarkable molecular machines that are able to conduct ions across biological membranes at extremely high rates without compromising the ion selectivity. Starting from the open crystal structures, we have studied the gating mechanism of these channels by molecular modeling techniques. LÄS MER

  5. 4. Quantitative applications of secondary ion mass spectrometry : solid-state diffusion and mass fractionation studies

    Författare :Ulf Södervall; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Secondary ion mass spactromy SIMS ; isotopic ratios; elemental semiconductors; ionazion mechanisms; mass fractionation; high pressure; diffusion; activation parameters; isotope effects;

    Sammanfattning : .... LÄS MER

  7. 5. Mass spectrometry of biopolymers based on ion-induced desorption

    Författare :Roman Alexandrovich Zubarev; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Radiation sciences; Strålningsvetenskap; Radiation biology; Strålningsbiologi; Ion Physics; jonfysik;

    Sammanfattning : Various aspects of biopolymer molecular characterization by their molecular masses havebeen studied, with emphasis on ion-induced desorption and time-of-flight mass Spectrometry(TOF MS). Limitations of the average-isotopic mass concept, as well as the utility ofaccurate monoisotopic mass measurements for deriving amino-acid and elementalcompositions, are discussed. LÄS MER