Sökning: "echo"

Visar resultat 6 - 10 av 191 avhandlingar innehållade ordet echo.

  1. 6. A synchronic approach to the Serek ha-Yahad (1QS) : from text to social and cultural context

    Författare :Kamilla Skarström Hinojosa; Mikael Winninge; Jutta Jokiranta; Umeå universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; 1QS; Serek ha-Yahad; Serekh; Yahad; Text linguistics; synchronic; Qumran; Dead Sea Scrolls; Rule texts; René Girard; Scapegoat; social context; cultural context; Hebrew; Second Temple; hierarchy; mimetic violence; discourse analysis; discourse; serek; serekh; covenant; truth; falsehood; text; Micah 6:8; wilderness; community; messianic; law; atone; judge; intertextuality; allusions; quote; echo; intertext; apocalyptic; Hebrew bible.; gamla testamentets exegetik; Old Testament Exegesis;

    Sammanfattning : The purpose of this study is to investigate the social and cultural contexts of 1QS (Serek ha-Yahad) by means of a textual study. The analysis of the text is performed in a synchronic perspective. This means that lexical choices, grammatical forms, references, topics, themes, and intertextuality are analyzed text-internally. LÄS MER

  3. 7. Stereophonic Acoustic Echo Cancellation: Theory and Implementation

    Författare :Peter Eneroth; Institutionen för elektro- och informationsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Stereophonic Acoustic Echo Cancellation; Filterbank; Two-Channel Fast RLS; Two-Channel Frequency-Domain Adaptive filtering; NLMS; Electronics and Electrical technology; Audio Coding; Elektronik och elektroteknik; Signal processing; Signalbehandling; Subband;

    Sammanfattning : The thesis treats theory and implementation aspects for stereophonic acoustic echo cancellation. In Paper I a complete implementation of a stereophonic acoustic echo canceler based on the two-channel fast recursive least-squares algorithm is presented. LÄS MER

  4. 8. Susceptibility effects in MRI and 1H MRS. The spurious echo artifact and susceptibility measurements

    Författare :Åsa Carlsson; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MRI; 1H MRS; susceptibility; spurious echo; artifact; artefact;

    Sammanfattning : When performing magnetic resonance (MR) experiments, a strong homogeneous magnetic field is often preferred, especially in clinical applications. However, all objects that are placed in the magnetic field will disturb the field homogeneity and cause local magnetic field gradients. LÄS MER

  5. 9. Low-Complexity Algorithms for Echo Cancellation in Audio Conferencing Systems

    Författare :Christian Schüldt; Blekinge Tekniska Högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Acoustic echo cancellation; Adaptive filtering; Two-path; Double-talk detection;

    Sammanfattning : Ever since the birth of the telephony system, the problem with echoes, arising from impedance mismatch in 2/4-wire hybrids, or acoustic echoes where a loudspeaker signal is picked up by a closely located microphone, has been ever present. The removal of these echoes is crucial in order to achieve an acceptable audio quality for conversation. LÄS MER

  7. 10. MRI evaluation and image processing in gel dosimetry. A study of selected MRI properties and image processing in 3D gel dosimetry

    Författare :Peter Magnusson; Malmö Medicinsk strålningsfysik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Klinisk fysiologi; medical instrumentation; tomography; radiology; Clinical physics; image registering; multi-slice; slice profile; ferrous sulphate; polyacrylamide; 3D volume acquisition; RF field; B1 field; relaxation time; T1; T2; spin-echo; multi-spin-echo; stochastic noise; nonuniformity; SNR; radiologi; tomografi; medicinsk instrumentering; Radiopharmaceutical technology; Radiofarmaceutisk teknik; Physics; Fysik;

    Sammanfattning : Gel dosimetry is a new dosimetry method applied in radiation therapy. Gel dosimeters consist of a radiation sensitive gel, which can integrate absorbed doses from several radiation sources or beams. The dose to the gel can be evaluated by magnetic resonance imaging (MRI), a procedure that is the focus of the present thesis. LÄS MER