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This paper addresses multicarrier communications over the additive white Gaussian noise channel under a power spectral density (PSD) constraint. Depending on the shape of the PSD mask, straightforward power loading according to the waterfilling principle may yield poor throughput results. Several information processing techniques have been proposed to enhance the spectral properties of a multicarr
A reduced four-step scheme for Computational Fluid Dynamics (CFD) analysis is presented here in the context of industrial type laboratory combustor. The present scheme has been optimized for a syngas mixture consisting of 10% CH4, 22.5% CO and 67.5% H2 by volume, and for a methane-air mixture. The optimization of the global scheme is done by comparing with the detailed San Diego mechanism using pe
In 1920, the working day in Swedish industry and services was cut from 10 to 8 hours without wages being cut correspondingly. This change resulted in a dramatic wage push, with real wages increasing by about 50 percent in the years from 1919 to the deflation of 1921–22. This paper studies the consequences of this wage push for real wages, unemployment, profits and investments. Since agriculture wa
A successful previous project E-GIS (Leonardo da Vinci programme) was implemented during 2002-2006. The objectives were to establish co-operation between European Universities and GIS users and to develop modularised courses intended for flexible learning. Ten partners from six European countries (BU, LT, NO, NL, PT, SE) participated. During the project a study program, 100 % Internet based, corre
Popular Abstract in Swedish Denna avhandling handlar om stam- och progenitorceller från den embryonala mushjärnan. Jag har studerat dessa cellers förmåga att växa in vitro (utanför kroppen) samt efter transplantation till hjärnan hos vuxna och nyfödda råttor. Forskning om stamceller har länge varit ett populärt och uppmärksammat forskningsområde, men under de senaste åren har intresset i det närmaIn this thesis we have used cells dissected from the lateral ganglionic eminence (LGE), the medial ganglionic eminence (MGE), and the cortical primordium of the embryonic mouse forebrain. The tissue was dissected from either i) wild-type mice, ii) green fluorescent protein (GFP)-, or iii) Gtv-a-expressing transgenic mice, and subsequently grown and expanded in vitro using two different protocols.
In a previous investigation (Segerup, 2003) the word accent manifestations in a number of West Swedish dialects and Gothenburg Swedish were examined. Contrary to the generally accepted picture of the word accent distinction the results showed no clear and systematic distinction between the word accents with respect to the timing and shape of the pitch contours. The present paper focuses on the pit
Popular Abstract in Swedish Vad är det för något i human mjölk som dödar cancer celler? Kan “fel” veckade proteiner vara nyttiga? Kan fett vara inblandat i protein veckning? Det är några av frågorna som tas upp i denna avhandling. Allt levande består av proteiner som i sin tur är uppbyggda av amino syror. Det finns 20 st. olika amino syror som på olika sätt kan länkas samman till proteinkedjor. DBy varying its secondary or tertiary structure a single protein can attain new biological functions. The amyloid forming proteins are the best known examples where a change in conformation leads to the formation of amyloid fibrils that accumulate in tissues and cause disease. a-lactalbumin in contrast, is an example of a protein that acquires a beneficial function when the conformation is altered
When a feedback controller is implemented in a networked embedded system, the computations and communications induce delays and jitter, which may destabilize the control loop. The majority of previous work on analysis of control loops with time-varying delays has focused on output (actuation) jitter. In many embedded systems, input (sampling) jitter is also an issue. In this paper, we analyze the
Rapporten presenterar resultat från ett forskningsprojekt ”Mäta resfria möten” (MRM), som bedrivs av Internationella miljöinstitutet (IIIEE) vid Lunds universitet i 2011-2014 med finansiering från Energimyndigheten och Trafikverket, och syftar till att utveckla ett ramverk, indikatorer och metoder för utvärdering, uppföljning och redovisning av resfria möten (RM), deras användning och effekter på
