Sökning: "Acoustic radiation"

Visar resultat 11 - 15 av 65 avhandlingar innehållade orden Acoustic radiation.

1. 11. Active Junction Control and Piezoelectric Hybrid Damping for Improving the Acoustic Performance of Lightweight Structures

   Författare :Jonas Svensson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hybrid passive-active control; Piezoelectric shunt damping; Sound radiation; Active junction control;

   Sammanfattning : Weight reduction is a key factor in lowering the fuel consumption and thereby the greenhouse emissions from vehicles. However, reducing the weight normally results in a deterioration of the acoustic performance. Thus, the purpose of this thesis is to investigate damping treatments for lightweight vehicle panels. LÄS MER

3. 12. Acoustic manipulation for cell and spheroid cellomics

   Författare :Karl Olofsson; Martin Viklund; Maria Tenje; KTH; []
   Nyckelord :Biological and Biomedical Physics; Biologisk och biomedicinsk fysik;

   Sammanfattning : Ultrasonic standing wave (USW) particle manipulation has during the last two decades matured into a valuable tool to combine with microfluidics. Acoustophoresis, migration through sound, is the result of the acoustic radiation force acting on particles suspended in an acoustic field. LÄS MER

4. 13. Environmental factors and risk of acoustic neuroma

   Författare :David Pettersson; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : The aim of this thesis was to increase the knowledge about environmental risk factors of acoustic neuroma and to increase the understanding of the methodological problems encountered when studying this tumor. Acoustic neuroma is a benign, usually slow growing, intracranial tumor of the vestibulocochlear nerve (cranial nerve VIII), the nerve that transmits information about hearing and balance from the inner ear to the brain. LÄS MER

5. 14. Acoustic excitation and transmission of lightweight structures

   Författare :Jonas Brunskog; Teknisk akustik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; point mobility; Lamb waves; wood.; Building construction; plate excitation; cavities; near-periodicity; nearly periodic; sound insulation; timber; structural acoustics; spatial Fourier transform; resilient device; prediction model; periodic; lightweight; ISO tapping machine; airborne noise; Building acoustics; impact noise; Byggnadsteknik;

   Sammanfattning : In order to increase our knowledge of the sound transmission and radiation processes of lightweight wall and floor structures, theoretical models are needed. Detailed models may form a valuable tool. In lightweight floor structures, impact sound insulation is perhaps the most important property to consider. LÄS MER

7. 15. Biomarker detection via lab-on-a-chip integrated immunoaffinity approach for fluorescence and mass spectrometry readout

   Författare :Asilah Ahmad Tajudin; Avdelningen för Biomedicinsk teknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; immunoaffinity; affinity prefractionation; immunoMALDI; solid-phase extraction; protein digestion; ISET; antibody microarray; signal amplification; fluorescence; microfluidics; lab on a chip; separation; acoustophoresis; ultrasound; acoustic radiation force; plasma; proteomics; MALDI mass spectrometry; immunoassay; porous silicon.;

   Sammanfattning : The blood/plasma protein biomarker profile represents the pathological and physiological changes relating to human diseases. However, the plasma proteome reflects a high degree of complexity that results in a challenge for most analytical methods in clinical diagnostics. LÄS MER