196,597 research outputs found
Insorti contro la luce morente. Note per una possibile lettura filosofico-politica di Moby Dick
No full textAutomatic target recognition by means of polarimetric ISAR images and neural networks
No full text© 2009 IEEEInverse synthetic aperture radar (ISAR) images are often used for classifying and recognizing targets. Moreover, the use of fully polarimetric ISAR (Pol-ISAR) images enhances classification capabilities. In this paper, the authors propose a novel automatic target recognition (ATR) technique based on the use of fully Pol-ISAR images and neural networks (NNs). In order to reduce the amount of data processed by the classifier, the brightest scattering centers are first extracted by means of the Pol-CLEAN technique, and then, their scattering matrices are decomposed using Cameron's decomposition. A classifier based on the use of multilayer perceptron NN that makes use of the features extracted from the Pol-ISAR images is then implemented. A proof-of-concept test is performed on real data acquired during a controlled experiment in an anechoic chamber.Marco Martorella, Elisa Giusti, Amerigo Capria, Fabrizio Berizzi and Bevan Bate
Use of interleukin-2 in the management of haematological malignancies: focus on minimal residual disease. Mandelli F, Capria S, Vignetti M, Meloni G.
No full textInterleukin (IL)-2 is a glycoprotein lymphokine which induces proliferation of all subclasses of T-lymphocytes, natural killer cells and lymphokine activated killer cells, differentiation of cytotoxic cells and secretion of other cytokines, especially interferon-gamma. A fundamental property of IL-2 activated effector cells is to selectively lyse freshly isolated tumour cells. Work carried out on animal tumour models and application in human therapeutics has suggested the potential value of an immunotherapeutic approach in haematological malignancies, especially in the setting of minimal residual disease. Extensive phase I/II trials have been conducted in all haematological diseases, but the most interesting results have been obtained in acute myeloid leukaemia and non-Hodgkin's lymphoma, where the possibility of achieving partial and complete responses in patients with advanced disease has been reported. The feasibility and immunomodulatory effects of IL-2 treatment in patients with minimal residual disease after high-dose chemotherapy have also been explored. However, the heterogeneity of cases treated and administration schedules used does not allow definitive conclusions to be drawn about the true impact of IL-2 treatment on the prognosis of these patients. The clearly encouraging results reported in the literature deserve further investigation from a biological and clinical point of view; until the role of IL-2 in haematological malignancies has been identified, it should be used only in the investigative setting of clinical trials
Target-borne ECM against OFDM-based Imaging Passive Radars
No full textPassive radars are notoriously robust to jamming because the receiver location cannot be detected. Moreover, the use of OFDM based reference signals further improves the robustness against jammers. Nevertheless, recent papers have shown that deception/spoofing-type of jamming may still be possible. The idea was to use a target-on-board deception jammer aimed at deceiving the receiver by preventing it from precisely locating and identifying the target when passive radar imaging is used. In this paper, the same authors test the proposed approach by using a measured DVB-T reference signal. A realistic scenario is emulated by using a multichannel DVB-T signal (three DVB-T channels- A bout 24 MHz bandwidth)
Co-infection with SARS-CoV-2 omicron BA.1 and BA.2 subvariants in a non-vaccinated woman
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High Range Resolution Multichannel DVB-T Passive Radar: Aerial Target Detections
No full textThe exploitation of multiple DVB-T channels for a passive radar system has been considered to enhance the radar range resolution. A preliminary study has focused on the AF analysis to verify the suitability of a multichannel DVB-T signal for radar applications. The theoretical study has been supported by preliminary measurements relative to three adjacent DVB-T channels. Experimental results in an aerial scenario through the use of SDR hardware have been carried out and showed a clear improvement in range resolution when using multichannel rather than single channel DVB-T signals. It may be proven in the near future that target classification of noncooperative target radar imaging will be enabled by a high resolution DVB-T passive radar that is obtained by exploiting multichannel DVB-T signals
The problem of ventricular tachycardia with torsade de pointes and of its rational treatment
No full text[No abstract available
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