Sökning: "Stefan Sack"

Hittade 2 avhandlingar innehållade orden Stefan Sack.

1. 1. Experimental and Numerical Multi-port Eduction for Duct Acoustics

   Författare :Stefan Sack; Abom Mats; Phillip Joseph; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; acoustics; aeroacoustics; flowacoustics; multi-ports; orifice; silencer; experiment; numeric; IDDES; LNSE; optimization; test rig; Monte Carlo; Teknisk mekanik; Engineering Mechanics;

   Sammanfattning : Sound generation and propagation in circular ducts for frequencies beyond the cut-on frequencies of several higher order acoustic modes is investigated. To achieve this, experimental and numerical set-ups are designed and used to research aeroacoustic interactions between in-duct components and to conceive noise mitigation strategies. LÄS MER

3. 2. Banks, Shocks and Monetary Policy

   Författare :Tamás Vasi; Nils Gottfries; Stefan Pitschner; Refet Gürkaynak; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Monetary Policy; Financial Markets; Banks;

   Sammanfattning : Essay 1: This paper studies the effect of monetary policy on the economy, distinguishing the effects of exogenous monetary policy shocks from information shocks that reveal the Federal Reserve's assessment of the economic outlook. To identify these two shocks, I exploit the difference in information content in public announcements by the Fed in its statements (released on decision days) and minutes of FOMC meetings (transcripts of the policy decision, released at a later date). LÄS MER