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Large intelligent surface (LIS) is a technology that extends massive MIMO by considering an even greater number of antennas distributed throughout vast areas. In order to be able to implement this technology, it is crucial to consider decentralized architectures so as to make the whole system scalable. We consider a LIS divided into several LIS panels of smaller size, which can be located far away

A solid oxide fuel cell (SOFC) is a clean and high-efficiency energy conversion device, which undergoes improvement of performance continuously. The transport of gas species and charges proceed in the porous electrodes. The porous electrodes are also responsible for the removal of exhaust gases. In this paper, a fully coupled 3D single-channel multiphysics computational fluid dynamics (CFD) model

In this paper we present a unified formulation for a large class of relative pose problems with radial distortion and varying calibration. For minimal cases, we show that one can eliminate the number of parameters down to one to three. The relative pose can then be expressed using varying calibration constraints on the fundamental matrix, with entries that are polynomial in the parameters. We can

PAH och CTEPH är sällsynta sjukdomar, präglade av andfåddhet, vilket ska utredas tidigt intill klar diagnos föreligger.Omhändertagande vid PAH och CTEPH kräver en multidisciplinär mottagning med specialistutbildade läkare samt kontaktsjuksköterskor.Samarbete mellan SveFPH och patientföreningen PAH Sverige har skapat en nationell samsyn kring PAH- och CTEPH-specialistcentrum och -mottagningar vid lThe PAH and CTEPH care in Sweden is since 2007 structured in collaboration with the Swedish Society of Pulmonary Hypertension (SveFPH) and centralized to pulmonary hypertension (PH) centers at the university hospitals. At biannual SveFPH meetings, ideas are exchanged to spread new knowledge on diagnostics and treatment in Sweden. The PAH-CTEPH centers are to be further stimulated to provide indivi

This paper investigates the differences of leaded and low-lead brasses in terms of mechanical and thermal properties, machinability and product strength using physical testing and simulations. The information can be used in companies for Design for Manufacturability (DFM) while designing processes for lead free brass. The novelty of this research is to combine data from different testing methods t

The need for sustainability transitions is widely recognised, along with a concurrent need for the evolution of knowledge systems to inform more effective policy action. Although there are many new policy targets relating to net zero emissions and other sustainability challenges, cities, regional and national governments are struggling to rapidly develop transformational policies to achieve them.

We present stellar parameters, stellar ages, and detailed elemental abundances for Na, Mg, Al, Si, Ca, Ti, Cr, Fe, and Ni for 32 solar sibling candidates. Technique of chemical tagging gives us a high probability that four stars might be from the same open cluster. Only one candidate HIP 40317 which has solar metallicity and age could be a solar sibling. We performed simulations of the Sun's birth

The Swedish Society for Clinical Chemistry has now completed its second board examination for voluntary specialist diploma in clinical chemistry. The first day comprised a 6 hour written examination (about 20 essay questions). The second day was an oral examination in front of five clinical chemists representing different aspects of the specialty, firstly as questions on the subject as a whole and

Green economy is a concept frequently used by governments and international institutions to promote sustainable transformations of the economy. In this study, we explore how the transition towards a green economy is being conceptualised in policy terms in the three Nordic countries Denmark, Norway, and Sweden. Comparing these cases, we analyse strategic policy documents on green growth, circular e

Summary form only given. The windmill technique is an attractive alternative to the Lempel-Eastman technique for fast m-sequence generation. The author has generalized the class of linear recurrence relations for which the windmill technique results in an m-sequence generator. A converse to a set of known necessary conditions has been obtained.

Why is it that semidefinite relaxations have been so successful in numerous applications in computer vision and robotics for solving non-convex optimization problems involving rotations? In studying the empirical performance, we note that there are few failure cases reported in the literature, in particular for estimation problems with a single rotation, motivating us to gain further theoretical u

An investigation of velocity-based vibration metrics for predicting structure-borne noise in timber buildings is presented in the paper. The purpose of the study is to derive a robust metric based solely on the vibration response and with a known correlation to the acoustic response in a room. Such a measure is useful for establishing simplified numerical prediction models and for making robust co

Group Decision and Negotiation Support Systems need to provide support for different types of communication activities. The purpose of this study is to identify and test cross-linguistic measures for recognition of communication activities in order to provide support for various forms of group decision and negotiation support systems, including e-negotiation support systems. The study uses quantit