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A modularized approach to modeling of harmonics in electrical distribution networks at steady state is presented. It is based on harmonic balance and exploits that the loads in a distribution network are connected in parallel in such a way that their operating conditions are approximately known in advance (e.g. 230 V, 50 Hz) and the harmonic distortion of the voltage is limited. The model for a co
Is low-cost tracking precise enough for recognition of pointing actions? We investigate the quality of the human body tracking available with a Kinect camera by comparing it to a state-of-the-art motion capture system. The application is action recognition with parametric hidden Markov Models (PHMMs) for programming industrial robots. The data from the Kinect is overall more noisy and potentially
Deuterated proteins and other bio-derived molecules are important for NMR spectroscopy, neutron reflectometry, small angle neutron scattering, and neutron protein crystallography. In the current study we optimized expression media and cell culture conditions to produce high levels of 3 different deuterated human carbonic anhydrases (hCAs). The labeled hCAs were then characterized and tested for de
This paper analyses optimal subband beamforming performance mainly aimed at speech enhancement and acoustic echo suppression for personal communication devices, personal computers and wireless cellular telephones. The focus is on theoretical limits of finite impulse response (FIR) beamformers for spatially spread sources in the array near-field. Performance of the Wiener solution is compared to th
Based on a case study of a telecom company’s transition towards more software value in their products, we describe and discuss SCM issues related to when traditional manufacturers go from a “hardware focus” to a mixed product configuration. Although software supply chain is not much discussed in logistics, it seems that logistics/SCM frameworks also fit many software supply issues. A specific soft
An extension to workload-based performance simulation approach is presented, which enables modelling applications using a UML tool and transforming them to SystemC with a code generator. Therefore partial reuse of existing UML application models is feasible, removing the need for separate workload modelling in SystemC. The UML to SystemC transformation is applied to a mobile video player case stud
Popular Abstract in English N/AAquatic systems worldwide receive large amounts of organic carbon from terrestrial sources. This ‘allochthonous’ organic carbon (AlloOC) affects critical physical and chemical properties of freshwater ecosystems, with consequences for food web structures and exchange of greenhouse gases with the atmosphere. In the boreal region, loadings of AlloOC are particularly high due to leaching from huge or
Regression testing is expensive and may consume much of organizations’ software development budgets. Thus, it is of interest to reduce the total time devoted to test execution by using test selection techniques. Many techniques have been proposed but few have been evaluated on real-world, large scale systems. In this paper we report on an empirical evaluation of using the class firewall regression
Grundkurser vid LTH har ofta problemet att motivera studenten eftersom han/hon inte omedelbart kan koppla teorin till sin vardag eller till kommande profession. Ett väl dokumenterat sätt att synliggöra användning av kunskap är låta studenterna arbeta aktivt med realistiska problemställningar på en lagom nivå, t.ex. i projekt eller cases. I grundkursen i matematisk statistik för V och L använder vi
