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On the Choice of Sampling Rates in Parametric Identification of Time Series

Aliasing gives a lower bound for the sampling rate in ordinary spectral analysis of a time series. In parametric it appears at first sight that no such limitations are present. In this note we will obtain insight into this paradox by analyzing a simple Gauss-Markov process. We assume that a time series analysis is performed based on N samples of the series at equal spacing h. The result shows that

Swedish ambulance services 1935-1936 of Gunnar Agge

The fact that Sweden has been spared from war on its soil for almost 200 years, has not stopped Swedish citizens from participating in conflicts worldwide during this period. This has been described, especially from the soldiers perspective. The contribution of Swedish physicians has not been written about to the same extent. When Mussolini's Italy in October 1935 invaded the poor and underdevelop

Functional integration of grafted neural stem cell-derived dopaminergic neurons monitored by optogenetics in an in vitro Parkinson model.

Intrastriatal grafts of stem cell-derived dopamine (DA) neurons induce behavioral recovery in animal models of Parkinson's disease (PD), but how they functionally integrate in host neural circuitries is poorly understood. Here, Wnt5a-overexpressing neural stem cells derived from embryonic ventral mesencephalon of tyrosine hydroxylase-GFP transgenic mice were expanded as neurospheres and transplant

Allelic variants of streptokinase from Streptococcus pyogenes display functional differences in plasminogen activation.

A common mammalian defense mechanism employed to prevent systemic dissemination of invasive bacteria involves occlusion of local microvasculature and encapsulation of bacteria within fibrin networks. Acquisition of plasmin activity at the bacterial cell surface circumvents this defense mechanism, allowing invasive disease initiation. To facilitate this process, S. pyogenes secretes streptokinase,

Utility of Intra-operative Cone Beam Computed Tomography in Endovascular Treatment of Aorto-iliac Occlusive Disease.

Endovascular treatment of aorto-iliac occlusive disease (AIOD) is well established, but to maintain long-term patency, secondary interventions are common. Multiple stents and iliac artery tortuosity often make it difficult to evaluate stent compression intra-operatively and this might be a cause for later failure. Completion angiography (CA) and pressure gradient (PG) measurement are often used to

Efficient Compression and Rasterization Algorithms for Graphics Hardware

Despite rapid development, modern graphics hardware is still much too slow to render photo-realistic images in real time, and it will most likely remain so if we rely only on yearly growth in hardware performance. Therefore, better algorithms are constantly needed in order to advance the field. In the first part of this thesis, we present new algorithms for hardware rasterization. We investigate

Dansade revolten

Regular column on theatre in the weekly newspaper Arbetaren (The Worker).

Gränsens ikonografi: En studie av kalkmålade bilder vid kyrkorummens trösklar och gränser

Abstract in UndeterminedThe present text deals with the iconography of the borders of sacred space, focusing on late medieval mural paintings in parish churches in Scania as a part of medieval Denmark. The images unite with the architectural space, the worshippers and their ritual actions in creating and defining sacred space. The key concept is spatial liminality, the crossing of borders in a rit