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We analyze the frequency and nature by which new firms are acquired by established businesses. Acquisitions are often considered to reflect a technology transfer process and to also constitute one way in which a "symbiosis" between new technology-based firms (NTBFs) and established businesses is realized. Using a micro-level dataset for Sweden in which we follow new entrants up to 18 years after e
We consider the effect of signaling rate (baud rate) on the information rate of single carrier linear transmission systems with Gaussian inputs. Several different communication scenarios are investigated: correlated or uncorrelated symbols, a fixed modulation pulse or a modulation pulse varying with the signaling rate and frequency selective or flat channels. For uncorrelated symbols, we show that
Popular Abstract in Swedish Efter den senaste istiden har klimatet varit dynamiskt med både stora och snabba klimatförändringar, om än inte av samma storlek som under istiden. Hur utbredda och vilka effekter dessa klimatförändringar har haft är dock inte helt kartlagt. Målet med denna avhandling är att i detalj rekonstruera de klimat- och miljöförändringar som har påverkat ögruppen Tristan da CunhIt has been shown that the present interglacial has been climatically dynamic with both rapid and severe climatic fluctuations. The spatial and temporal differences of these changes are however not fully resolved. The aim of this thesis is to present a detail high resolution record of past climate changes from the central South Atlantic. Peat and lacustrine sediment sequences were retrieved from
This study aims to evaluate if children's affective experience of every-day travel varies depending on travel mode and destination of travel. More specifically, what are children's reported valence (unpleasantness-pleasantness) and activation (deactivation-activation) while travelling to different destinations and does this experience have spill-over effects on how they perceive activities at the
NGC 595 is, after NGC 604, the second most luminous HII region in theMilky Ways neighbouring spiral galaxy M 33. Its Wolf-Rayet starcontent has mainly been unveiled by two different channels. On the onehand, the stellar population of NGC 595 has been resolved and its WRstars identified through on-line/off-line HeIIlambda4686 observationsrealised with the HST. Nevertheless, due to the limited numbe
The possibility of using the channel reciprocity between the uplink and downlink channels in Frequency Division Duplex (FDD) systems to improve the efficiency has been deeply investigated. Previous studies have come to different conclusions for the characterization of the dissimilarity in uplink and downlink channel properties. This paper analyzes the mismatch in directional properties of the upli
Abstract This thesis consists of the following three papers Paper I. Hankel operators on Bergman spaces and similarity to contractions. In this paper we consider Foguel-Hankel operators on vector-valued Bergman spaces. Such operators defined on Hardy spaces play a central role in the famous example by Pisier of a polynomially bounded operator which is not similar to a contraction. On Bergman sp
The paper examines the impact of Rician fading on the orthogonality of dual-polarized MIMO channels in a measured urban macrocellular scenario. The measurements confirm the previous finding that the Rician
What do we need to know about our students to better provide for more equitable outcomes? Who will succeed depends on many factors, and student personality traits constitute one factor that has received less attention in the engagement and teaching literature. The aim of the present study is to add to discussions on teaching in higher education by exploring how students differ on personality trait
This chapter describes the basic principles inside the VEG extension to the ForSAFE model system. It allows changes in ground vegetation to be calculated, an important part of biodiversity. In the VEG model, the basis for modelling ground vegetation dynamics is a competition strength model based on soil chemistry promoting and retarding factors, nutrients, water and light. The strength is used in
One major means to address corporate sustainability practices in organisations are sustainability-oriented innovation practices, which tend to result in significantly improved products, services, processes or even management systems. Prior research has widely discussed the relevant issues about integrating sustainability aspects into innovation process; however, little empirical research has been
This paper evaluates the utility of the feedback particle filter (FPF) for state estimation of SE(2)-configured dynamics in a real-time context. The filter is implemented in discrete time to fuse gyroscopic-and accelerometer measurements with Ultra-Wideband (UWB) and camera measurements. With this state information, the FPF is compared to other common filters in terms of the estimate mean square e
We consider designing demodulators for linear vector channels that use reduced-size trellis descriptions for the received signal. We assume an iterative receiver and use interference cancellation (IC) with soft-information provided by an outer decoder to mitigate the signal part that is not covered by a reduced-size trellis description. In order to reach a trellis description, a linear filter is a
The paper proposes an efficient microphone array processing technique for speech enhancement. The scheme incorporates the source and interference predefined regions into a subband generalized sidelobe canceller (GSC). The lower path consists of two space constrained beamformers to extract the interference information outside the source region. This information then serves as a reference for an imp
In this paper, we study the block error rate (BLER) performance of spatially coupled low-density parity-check (SC- LDPC) codes using a sliding window decoder suited for streaming applications. Previous studies of SC-LDPC have focused on the bit error rate (BER) performance or the frame error rate (FER) performance over the entire length of the code. Here, we consider protograph-based constructions
In 2008, the Swedish Football Association and the insurance company Folksam, where all licensed players are insured, initiated a project aiming to reduce the burden of severe knee injuries in Swedish football. As a first step, the efficacy of an injury prevention exercise programme (IPEP) was evaluated in girls’ adolescent football (12–17 years). In a large-scale cluster randomised controlled tria
