Sökning: "fundamental frequency range"

Visar resultat 16 - 20 av 90 avhandlingar innehållade orden fundamental frequency range.

1. 16. Scaling and Gating Attosecond Pulse Generation

   Författare :Christoph Heyl; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Coherent imaging; Ultrafast electron dynamics; Single attosecond pulses; Attosecond pulse trains; XUV sources; High-order harmonic generation; XUV frequency combs; Fysicumarkivet A:2014:Heyl;

   Sammanfattning : High-order harmonic generation (HHG) provides the basis for attosecond light sources delivering coherent pulses in the extreme ultraviolet spectral region. Such light sources are employed for a variety of applications within imaging, attosecond spectroscopy, and high-precision frequency metrology. LÄS MER

3. 17. Molecular studies of initial atmospheric corrosion of copper : Exploration of ultra-sensitive techniques for the inhibiting effect of self assembled monolayers, and the effect of gamma radiation

   Författare :Saman Hosseinpour; Christofer Leygraf; Franz Geiger; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Corrosion; copper; self assembled monolayer; sum frequency spectroscopy; qcm; gamma radiation;

   Sammanfattning : Atmospheric corrosion indoors is of great practical importance for the degradation of metals, for example in electronics, military equipment, and cultural heritage items. It involves a wide range of chemical, electrochemical, and physical processes occurring in gas, liquid, and solid phases, and at the interfaces between them. LÄS MER

4. 18. Current measurement by real-time counting of single charges

   Författare :Jonas Bylander; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; array of tunnel junctions; Coulomb blockade; radio frequency single electron transistor; SET oscillations; time correlated tunnelling; metrology; current standard; SET; charge solitons;

   Sammanfattning : The first real-time observation of time correlated single-electron tunnelling is reported in this thesis. This is a direct detection of charge discreteness in an electrical current.When a current, I, flows through a chain of metallic islands, connected by small tunnel junctions, a lattice of charges is formed due to the Coulomb repulsion. LÄS MER

5. 19. Acoustic, perceptual and physiological studies of ten-year-old children's voices

   Författare :Anita McAllister; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Child voice; hoarseness; perceptual evaluation; voice characteristics; visual analog scales; voice range profiles; fundamental frequency range; dynamic range; glottal closure; stroboscopy; vocal nodules; register transitions; subglottal pressure; SPL;

   Sammanfattning : The aim of the present investigation was to study hoarseness and its perceptual, acoustic and physiological characteristics in ten-year-old children's voices. Fifty-eight children's voices were perceptually evaluated along 15 voice parameters. LÄS MER

7. 20. Subjective assessment of vibrations in lightweight floors

   Författare :Junye Wang; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Teknisk akustik; Engineering Acoustics;

   Sammanfattning : Lightweight steel floors arise a lot of attentions because of its advantages, such as cost effective, recyclable, and having a short construction period. On the other hand, low frequency vibrations induced by normal human activities get more and more complains for these types of structures. LÄS MER