In the present paper an iterative time-reversal algorithm, that retrofocuses an acoustic wave field to its controllable part is established. For a fixed temporal support, i.e., transducer excitation time, the algorithm generates an optimal retrofocusing in the least-squares sense. Thus the iterative time-reversal algorithm reduces the temporal support of the excitation from the requirement of neglig

Biomedical Optics as an interdisciplinary field of science has been developed during many years and is experiencing tremendous growth, to cover a wide range of optical techniques and methods, utilized for medical therapeutic and diagnostic purposes. Biomedical optics contributes in the introducing methods and creation of devices used in healthcare of various specialties, such as ophthalmology, car

This paper gives an account of Colin McGinn's essay: "Can We Solve the Mind-Body Problem?". McGinn's answer to his own essay title is that the problem is forever beyond us due to the particular nature of our cognitive abilities. The present author offers a number of criticisms of the arguments which support this conclusion

In this paper, we investigate the analog front-end imperfection in multi-band orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband (UWB) systems and propose a joint estimation and compensation scheme. The estimation of CFO and SFO is presented on frequency domain, which is robust to frequency dependent I/Q imbalance. After that, I/Q imbalance and channel response is jointly estimate

Popular Abstract in Swedish Bildgivande system har en allt mer framträdande roll inom sjukvård och medicinsk forskning. En del av dessa system fungerar genom att en patient eller ett försöksdjur injiceras med ett läkemedel märkt med ett radioaktivt ämne, och sedan mäts den strålning som detta ämne avger för att skapa en bild av var ämnet, och därmed läkemedlet, befinner sig. Det finns både system Molecular imaging, both in vivo and ex vivo, is playing an increasingly important role in preclinical medical research. When using radionuclide-labeled tracers, e.g. in the development of radiopharmaceuticals for diagnostic imaging or for radionuclide therapy, quantitative in vivo imaging can be performed using emission tomography. Quantitative autoradiography of thin tissue sections is employed t

Popular Abstract in Swedish Trots ny fordonsteknik så har koldioxidutsläppen ökat med nästan 40% i Europa sedan 1990-talet. Detta beror främst på en tilltagande transport på våra vägar. Drivmedel som används inom transportsektorn är nästan uteslutande diesel och bensin, vilka härstammar från fossila bränslen. För att hantera konsekvenserna av transportfordons miljöpåverkan så blir lagstiftningen pThis thesis deals with large eddy simulations (LES) of turbulent combustion processes in direct injection internal combustion (IC) engines. Modeling of direct injection IC engine combustion involves modeling of turbulent spray/gas two-phase flow, modeling of chemical reactions of large hydrocarbon fuels and coupling of chemistry with turbulent flows. LES is chosen in this thesis for it capability

The paper discusses an iterative algorithm for computing approximations to the optimal value function for constrained control problems. The algorithm gives an explicit measure on the distance to the optimal value function. A major step in the course of constructing an algorithm for these problems is to choose an efficient parameterization. The choice has several implications. The main obstacl