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The Radon transform and its adjoint, the back-projection operator, can both be expressed as convolutions in log-polar coordinates. Hence, fast algorithms for the application of these operators can be constructed by using FFT, if data is resampled at log-polar coordinates. Radon data is typically measured on an equally spaced grid in polar coordinates, and reconstructions are represented (as images
We develop a novel high-resolution method for the estimation of the direction of incidence of energy emitted by sources in 3D space from wideband measurements collected by a planar array of sensors. We make use of recent generalizations of Kronecker's theorem and formulate the direction of arrival estimation problem as an optimization problem in the space of sequences generating so called general
To meet the challenges of consistent performance, low communication latency, and a high degree of user mobility, cloud and Telecom infrastructure vendors and operators foresee a Mobile Cloud Network that incorporates public cloud infrastructures with cloud augmented Telecom nodes in forthcoming mobile access networks. A Mobile Cloud Network is composed of distributed cost- and capacity-heterogeneo
In this paper, signal strengths from known WiFi access points are used together with a particle filter to perform indoor navigation. It is shown that more information is obtained by using signals of both 2.4 and 5.0 GHz, compared to using only one frequency. Thus, using both frequencies provides a more accurate positioning. The second contribution is an algorithm where WiFi measurements are combin
An on-chip, low power, and area efficient charge-pump (CP) that generates a multiple of the supply voltage (VDD) in a single clock cycle is presented. The proposed CP utilizes parallel cross-connected CP units, which are implemented using MIM (metal-insulator-metal) capacitors. In the target application, i.e., a sub-threshold SRAM, the capacitors are accommodated on top of the memory banks to remo
Complete data center failures may occur due to disastrous events such as earthquakes or fires. To attain robustness against such failures and reduce the probability of data loss, data must be replicated in another data center sufficiently geographically separated from the original data center. Implementing geo-replication is expensive as every data update operation in the original data center must
Industrial robotics is a complex domain, not easily amenable to formalization using semantic technologies. It involves such disparate aspects of the real world as geometry, dynamics, constraint-satisfaction, planning and scheduling, real-time control, robot-robot and human-robot communication and, finally, intentions of the robot user. To represent so different kinds of knowledge is a challenge an
In this paper we describe our approach to robotic skill representation and a prototypical implementation of a programming-by-demonstration approach that allows users to generate skills and robot program primitives for later re- finement and re-use. We intend to evaluate the applicability of this approach to high-level programming in a user study, which we also explain.
The role of glial cells in the pathogenesis of many neurodegenerative conditions of the central nervous system (CNS) is now well established (as is discussed in other reviews in this special issue of Frontiers in Neuropharmacology). What is less clear is whether there are changes in these same cells in terms of their behavior and function in response to invasive experimental therapeutic interventi
An optimal soft multiple-input multiple-output (MIMO) detector is proposed with linear complexity for a general spatial multiplexing system with two transmitting symbols and NR ≥ 2 receiving antennas. The computational complexity of the proposed scheme is independent of the operating signal-tonoise ratio (SNR) and grows linearly with the constellation order. It provides the soft maximum-likelihood
Truncated correlation and convolution operators is a general operator-class containing popular operators such as Toeplitz (Wiener-Hopf), Hankel and finite interval convolution operators as well as small and big Hankel operators in several variables. We completely characterize the symbols for which such operators have finite rank, and develop methods for determining the rank in concrete cases. Such
Studies have described the phenomenon of voluntary sexual exposure among youth online but only a few focus on the typical young person who has this experience. The purpose of this study was to investigate Swedish youth with experience of voluntary sexual exposure online, with regard to Internet behavior, social background, and psychosocial health including parent-child relationships. A representat
Combining attribute grammars with object-oriented programming supports a new kind of declarative programming, allowing compilers to be built in a highly extensible manner. By leveraging a base compiler, extended languages can be supported at a relatively low cost. Recent work shows the applicability of the technique to general-purpose programming languages like Java. In this article, we illustrate
När jag kom i kontakt med begreppet gärningsculpa, som är en nödvändig brottsförutsättning, under mina straffrättsstudier här vid Lunds Universitet slogs jag av att det, såvitt gäller just gärningsculpan, krävs en icke oväsentlig bedömning av domstolarna som saknar adekvata riktlinjer. I denna uppsats har jag därför försökt att: A) Beskriva svensk straffrätt gällande den straffrättsliga konstruktiUpon coming into contact with the Swedish legal concept of "gärningsculpa" (roughly, negligence or carelessness pertaining to an act, which is a necessary condition for criminal liability), during my studies of criminal law at Lund University, I was struck by the fact that there is a rather substantial judgment to be made by the courts, that lacks proper guidelines. In this paper I there
This essay describes different solutions for how to better regulate the market short- and long term, more cost efficiently and environmentally sustainable for emissions trading in the European Union´s trading system EU ETS. We analyse six different approaches to intervene the market. These six are; cancellation of allowances, revision of the reduction rate, backloading, extending demand, price flo
While democracies have existed in various forms for quite some time, e-democracies have only recently begun to surface all around the world. While „democracy‟ is still at the core, exactly what e-democracies entail is to some extent uncertain. In this thesis I explore e-democracies by applying a theoretical model on two cases, Eskilstuna and Malmö. By constructing a model with inspirations from so
This essay examines femme-identity through femmes own experiences. The focus of the study is clothing as a communicative medium for identity and performative acts to create your own self. The aim is to understand what it means to be femme, how the femme-identity is expressed visually and how the identity is negociated in different contexts. Theoretically the essay is based on queer theory regardin
I denna uppsats undersöks uppsalaskolans syn på rättighetsbegreppet med utgångspunkt i texter av Axel Hägerström, Vilhelm Lundstedt och Ingemar Hedenius. Syftet är att jämföra hur de tre författarna ser på rättighetsbegreppet. Uppsalaskolan har ofta framställts som en enhetlig rättsfilosofi, men i själva verket hade företrädarna skilda ståndpunkter i viktiga frågor. Alla tre författarna är i all vThis paper examines the Uppsala school of thought’s (Uppsalaskolans) approach to the concept of rights. The investigation is based on texts by the three legal philosophers Axel Hägerström, Vilhelm Lundstedt and Ingemar Hedenius. The Uppsala school of thought has often been presented as a coherent philosophy of law, but the representatives in fact held differing positions on a number of important i
MODELING LAND-COVER USING BIO-CLIMATE VARIABLES Vegetation (land-cover) is an inherent part of the climate system (M.-J. Gaillard et al. 2010). Natural, primarily climate-driven, vegetation and ecosystem processes interact with human land-use to determine vegetation patterns, stand structure and their development through time (e.g. Vitousek et al., 1997). The resulting land surface properties feed
Purpose: With this study we seek to reveal and analyse the difficulties and challenges change implementation processes may bring along. Our purpose is to find out how managers and their subordinates perceive change and change management processes, and what impact communication has on the implementation of organisational changes. Methodology: Our research is based on a hermeneutical interpretive p
