Fatal cardiac arrest in an adult patient with euthyroid anti-SSA/Ro-positive connective tissue disease: a case report

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A fully scalable wavelet video coding scheme with homologous inter-scale prediction

In this paper, we present a fully scalable wavelet-based video coding architecture called STP-Tool, in which motion-compensated temporal-filtered subbands of spatially scaled versions of a video sequence can be used as a base layer for inter-scale predictions. These predictions take place in a pyramidal closed-loop structure between homologous resolution data, i.e., without the need of spatial interpolation. The presented implementation of the STP-Tool architecture is based on the reference software of the Wavelet Video Coding MPEG Ad-Hoc Group. The STP-Tool architecture makes it possible to compensate for some of the typical drawbacks of current wavelet-based scalable video coding architectures and shows interesting objective and visual results even when compared with other wavelet-based or MPEG-4 AVC/H.264-based scalable video coding systems

Metodo di codifica video scalabile

4noUn metodo di codifica video scalabile in cui il segnale video viene elaborato e codificato a diversi livelli di risoluzione spaziale dove tra coppie di livelli spaziali viene abilitato un meccanismo di predizione che consente un confronto a livelli di risoluzione spaziale omologhi senza impedire che vengano persi dati utili al fine di ottenere una buona efficienza di codifica.openopenADAMI N.; BRESCIANINI M.; R. LEONARDI; SIGNORONI A.Adami, Nicola; Brescianini, Michele; Leonardi, Riccardo; Signoroni, Albert

SVC CE1: STool - a native spatially scalable approach to SVC

4noThis documents describes the UNIBS-SCL proposal in response to the MPEG21 SVC CE1 [1]. Our scalable video coding scheme, called STool, is based on a 2D+t+2D structure and is implemented using a modified version of the Microsoft Research Asia (MSRA) reference software [2] plus some modifications and tools which has been used in substitution. The STool architecture has been implemented in two different systems. In System-1 the modules provided in the MSRA software have been used to build the new STool architecture. In System-2 we test a new entropy coder, called GOF-EMDC, which is an extended version of the EMDC coder [3]. At the time GOF-EMDC codec and other parts of System-2 have not been optimized in many aspects, therefore we can expect better performance from our system in the next future. Despite this fact System-2 provides similar coding performances when compared to System-1. In addition, System-2 is much more flexible in many aspects, it guarantees a major number of functionalities and better fulfill the requirements list. Therefore with System-1 we intend to demonstrate the characteristics of the STool architecture, especially with respect to the reference software used, while with System-2 we customize and add functionalities to Stool. We submitted extraction and decoding software for both Systems-1 and System-2, System-1 coded sequences for both scenarios 1 and 2 and System-2 coded sequences for scenario 2 only. For System-2 scenario 1 we only had deadline problems. No technical problems actually exist to produce such sequences.ISO/IEC JTC1/SC29/WG11 MPEG2004/M11368 70th meeting, Oct. 2004, Palma de Mallorca, ESopenopenADAMI N.; BRESCIANINI M.; LEONARDI R; SIGNORONI A.Adami, Nicola; Brescianini, Michele; Leonardi, Riccardo; Signoroni, Albert

Blow-up for the pointwise NLS in dimension two: absence of critical power

We consider the Schr\"odinger equation in dimension two with a fixed, pointwise, focusing nonlinearity and show the occurrence of a blow-up phenomenon with two peculiar features: first, the energy threshold under which all solutions blow up is strictly negative and coincides with the infimum of the energy of the standing waves. Second, there is no critical power nonlinearity, i.e. for every power there exist blow-up solutions. This last property is uncommon among the conservative Schr\"odinger equations with local nonlinearity.Comment: 29 pages, in press on J. Differential Equations (some changes in the structure of the paper have been made with respect to the previous version). Keywords: NLS, blow up, point interactions, standing wave

Stability of the standing waves of the concentrated NLSE in dimension two

In this paper we will continue the analysis of two dimensional Schr\"odinger equation with a fixed, pointwise, nonlinearity started in [2, 13]. In this model, the occurrence of a blow-up phenomenon has two peculiar features: the energy threshold under which all solutions blow up is strictly negative and coincides with the infimum of the energy of the standing waves; there is no critical power nonlinearity, i.e., for every power there exist blow-up solutions. Here we study the stability properties of stationary states to verify whether the anomalies mentioned before have any counterpart on the stability features

A Fully Scalable Video Coder with Inter-Scale Wavelet Prediction and Morphological Coding

In this paper a new fully scalable - wavelet based - video coding architecture is proposed, where motion compensated temporal filtered subbands of spatially scaled versions of a video sequence can be used as base layer for inter-scale predictions. These predictions take place between data at the same resolution level without the need of interpolation. The prediction residuals are further transformed by spatial wavelet decompositions. The resulting multi-scale spatiotemporal wavelet subbands are coded thanks to an embedded morphological dilation technique and context based arithmetic coding. Dyadic spatio-temporal scalability and progressive SNR scalability are achieved. Multiple adaptation decoding can be easily implemented without the need of knowing a predefined set of operating points. The proposed coding system allows to compensate some of the typical drawbacks of current wavelet based scalable video coding architectures and shows interesting visual results even when compared with the single operating point video coding standard AVC/H.264

Skype-Hunter: A real-time system for the detection and classification of Skype traffic

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Promoting STEM via UMI: an Ecological Framing of CoPs in Networking and Networked Robotics

Ubiquitous Computing, Mobile Computing and Internet of Things (UMI) technologies, are widely diffused in the everyday life. In addition to their primary usage (e.g., supporting the implementation of the future 5G network),these technologies can be used in the context of Science Education.According to this perspective, the innovative psycho-pedagogical approach here presented has been ad-hoc developed for the Horizon 2020 Project “Exploiting Ubiquitous Computing, Mobile Computing and the Internet of Things to promote Science Education” (Umi-Sci-Ed). The aim of the project is to enhance knowledge and skills of Science, Technology, Engineering and Mathematics (STEM) and to promote positive attitudes towards these disciplines. In order to reach this goal, the UMI technologies, framed in the Community of Practices (CoPs) paradigm, will be introduced in the learning process of secondary schools’ students (i.e., 9thand 10thgrade). Specifically, the students will attend to innovative learning activities, such as hands-on activities, concerning with Networking and networked Robotics. In the present contribution, the theoretical framework that constitutes the rationale for the Umi-Sci-Ed projectwill be described. In particular, the “bottom-up” socio-constructionist perspective will be presented, aswell as the main technological tools (e.g., UDOO) that would be used to implement an integrated STEM learning environment. The expected results of the project will be discussed