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We consider whether stellar collisions can explain the observed depletion of red giants in the Galactic center. We model the stellar population with two different IMFs: 1) the Miller-Scalo and 2) a much flatter IMF. In the former case, low-mass main-sequence stars dominate the population, and collisions are unable to remove red giants out to 0.4 pc although brighter red giants much closer in may b
The blade tip region encounters high thermal loads because of the hot gas leakage flows, and it must therefore be cooled to ensure a long durability and safe operation. A common way to cool a blade tip is to design serpentine passages with 180-deg turn under the blade tip-cap inside the turbine blade. Improved internal convective cooling is therefore required to increase the blade tip lifetime. Di
I "Hotad idyll" förenas litteraturvetenskapens intressen för texter med historievetenskapens intresse för bredare sammanhang för att nå en större förståelse av historiska skeenden. I fokus står de föreställningar som präglade den vardagliga idyllen i 1950- och 1960-talens Sverige.
This paper presents a hardware mapping of an auto-correlator for Orthogonal Frequency Division Multiplexing stage for three radio standards: LTE, DVB-H, and IEEE 802.11n. Hardware cost is minimized by using only the sign bit in the autocorrelation function. The frequency offset estimation procedure is dramatically simplified by reducing the phase of the envelope to pi/2 resolution, which in turn r
Popular Abstract in Swedish Elektrocochleografi (ECoG) är en metod som mäter de elektriska signaler som uppstår i innerörat när örat stimuleras med ljud. Signalerna uppstår i snäckans sinnesceller, de så kallade hårcellerna, och i nervcellerna som utgår från snäckan. Snäckan är det organ som omvandlar ljudets mekaniska energi till elektriska signaler i hörselnerven. Hörselnerven förmedlar signalerElectrocochleography (ECoG) is an objective method to evaluate cochlear electrophysiology. The recordings are considered to reflect the mechano-electric processes of the cochlea, and can indicate the presence of suspected endolymphatic hydrops. The aim of the present thesis was to investigate the value of transtympanic (TT) ECoG in the clinical diagnosis and management of Menière´s disease. The tr
This paper provides an outline of a theory of causal truthmaking according to which contingent truths are made true by causal facts and dispositional mechanisms.
This thesis describes how to provide standardized, current based, differential protection for any three-phase power transformer, including phase-shifting transformers with variable phase angle shift and transformers of all construction types and internal on-load tap-changer configurations. The use of standard transformer differential protection for such applications is considered impossible in the
Texten handlar om de planer på att bygga om den så kallade Öresundspaviljongen vid brofästet utanför Malmö till ett exklusivt hotell som stadens kommunpolitiker umgicks med under ett par år i början av 2000-talet. Texten beskriver ett tidigt stadium i ett hotells historia; de visioner och planer som föregår det fysiska hotellet och förhoppningsvis lever kvar i byggnaden efter det att geografiska,
We present a method for evaluating measurements of bianisotropic materials in a waveguide. By solving an eigenvalue problem for a matrix formed from measured S-parameters, propagation constants in the material can be determined from the eigenvalues. The eigenvectors give additional information.
