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Search Results: 1 - 10 of 223817 matches for " R. Pazzi "
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Managing the clinical approach in neurological presentations
Paolo Pazzi
Journal of the South African Veterinary Association , 2013,
Abstract: How to cite this book review: Pazzi, P., 2013, ‘Managing the clinical approach in neurological presentations’, Journal of the South African Veterinary Association 84(1), Art. #960, 1 page. http:// dx.doi.org/10.4102/jsava. v84i1.960
Controlling hazards and safety in complex systems: a multi-layered part-whole approach to system safety
Luca Pazzi
Business Systems Review , 2012, DOI: 10.7350/bsr.a17.2012
Abstract: The behavior of complex dependable systems poses severe safety issues due to hazards which may result from incorrect and unpredictable behavior. In order to prevent such hazards, system behavior has to be specified and checked incrementally, in order to defeat the overall system’s complexity. Modularity in system design is however not trivial due to the intrinsic monolithic nature of the control loop, typical of such systems. An additional problem is given by the fact that the current modeling paradigm tends at introducing additional interactive complexity due to the direct communication and synchronization mechanism among decomposed modules. It can be shown, however, that modular decomposition is feasible by revising the current communication and interaction paradigm. Physical interactions in physical systems denote in fact less evident conceptual structures, which host the overall interaction and synchronization knowledge among the component parts. By introducing additional system entities with the aim of hosting such knowledge in a localized and compact manner, we obtain a part-whole hierarchy of systems, called holarchy. Such systems are, at the same time, both parts and wholes within a holarchy, thus giving a formal characterization to Koestler’s holons.
Systems of Systems Modeled by a Hierarchical Part-Whole State-Based Formalism
Luca Pazzi
Computer Science , 2013, DOI: 10.4204/EPTCS.133.3
Abstract: The paper presents an explicit state-based modeling approach aimed at modeling Systems of Systems behavior. The approach allows to specify and verify incrementally safety and liveness rules without using model checking techniques. The state-based approach allows moreover to use the system behavior directly as an interface, greatly improving the effectiveness of the recursive composition needed when assembling Systems of Systems. Such systems are, at the same time, both parts and wholes, thus giving a formal characterization to the notion of Holon.
NodePM: A Remote Monitoring Alert System for Energy Consumption Using Probabilistic Techniques
Geraldo P. R. Filho,Jó Ueyama,Leandro A. Villas,Alex R. Pinto,Vinícius P. Gon?alves,Gustavo Pessin,Richard W. Pazzi,Torsten Braun
Sensors , 2014, DOI: 10.3390/s140100848
Abstract: In this paper, we propose an intelligent method, named the Novelty Detection Power Meter (NodePM), to detect novelties in electronic equipment monitored by a smart grid. Considering the entropy of each device monitored, which is calculated based on a Markov chain model, the proposed method identifies novelties through a machine learning algorithm. To this end, the NodePM is integrated into a platform for the remote monitoring of energy consumption, which consists of a wireless sensors network (WSN). It thus should be stressed that the experiments were conducted in real environments different from many related works, which are evaluated in simulated environments. In this sense, the results show that the NodePM reduces by 13.7% the power consumption of the equipment we monitored. In addition, the NodePM provides better efficiency to detect novelties when compared to an approach from the literature, surpassing it in different scenarios in all evaluations that were carried out.
Canine spirocercosis-associated extraskeletal osteosarcoma with central nervous system metastasis
Paolo Pazzi,Samantha Tompkins,Robert M. Kirberger
Journal of the South African Veterinary Association , 2013, DOI: dx.doi.org/10.4102/ jsava.v84i1.71
Abstract: A five-year-old male Boerboel presented for examination, collapsed for an unknown period of time. On clinical examination, multifocal subcutaneous masses and enlarged prescapular lymph nodes as well as neurological deficits that suggested a multifocal neurological syndrome were found. Fine needle aspirates of the prescapular lymph nodes revealed cells suggestive of osteosarcoma. Radiographs showed foci of mineralisation within the soft tissue masses as well as diffuse pulmonary metastasis and a caudodorsal mediastinal mass believed to be a Spirocerca lupi nodule. Computed tomography imaging, necropsy and histopathology confirmed S. lupi oesophageal neoplastic transformation (extraskeletal osteosarcoma), believed to be the primary lesion, and the majority of secondary metastasis to the brain, spine, heart, multiple muscular groups and abdominal organs. This is the first known report of extraskeletal osteosarcoma metastasis to the brain and spinal cord in a dog.
Liquid Xe scintillation calorimetry and Xe optical properties
A. Baldini,C. Bemporad,F. Cei,T. Doke,M. Grassi,T. Haruyama,S. Mihara,T. Mori,D. Nicolò,H. Nishiguchi,W. Ootani,K. Ozone,A. Papa,R. Pazzi,R. Sawada,F. Sergiampietri,G. Signorelli,S. Suzuki,K. Terasawa
Physics , 2004,
Abstract: The optical properties of LXe in the vacuum ultra violet (VUV), determining the performance of a scintillation calorimeter, are discussed in detail. The available data, measured in a wider spectral region from visible to UV light, and in a large range of Xe densities, from gas to liquid, are examined. It is shown that this information can be used for deriving the LXe optical properties in the VUV. A comparison is made with the few direct measurements in LXe for VUV light resulting from the LXe excitation by ionizing particles. A useful relation is obtained which connects the Rayleigh scattering length to the refractive index in LXe.
An unusual case of familial hypertrophic cardiomyopathy with left ventricular systolic dysfunction: a still unsolved diagnosis
Elena Biagini,Chiara Pazzi,Stefania Rosmini,Ornella Leone
Cardiogenetics , 2012, DOI: 10.4081/cardiogenetics.2012.e8
Abstract: A 35-year-old woman was referred to our centre for clinical management of hypertrophic cardiomyopathy (HCM) with left ventricular (LV) systolic dysfunction (end-stage evolution). She was recently diagnosed elsewhere because of palpitations. Her 7-year-old daughter underwent familiar screening and she was diagnosed with classic HCM. She was completely asymptomatic without extracardiac or systemic manifestations. During the following years, they both experienced a similar clinical course with worsening dyspnoea and progressive deterioration of LV systolic function. They both underwent heart transplantation, the mother at the age of 47 and the daughter at the age of 23, respectively. Many diagnostic hypotheses, including sarcomeric HCM, Anderson-Fabry disease, glycogen storage diseases and mitochondrial cardiomyopathies have been taken into account. The diagnostic work-up included serial electrocardiogram and echocardiographic assessments, pathologic evaluation of the explanted hearts and genetic analysis of 8 sarcomeric and 3 metabolic genes. Even if a shared HCM phenotype (LV systolic dysfunction in two first-degree female family members associated with a likely autosomal dominant inheritance and absence of extracardiac or multisystemic manifestations) could support a temptative diagnosis of sarcomeric HCM, a definitive diagnosis could not be reached, due to the lack of genetic analysis to confirm such diagnosis.
The $A_T$ emission of KCl:Tl interpreted as a double $A_T+A_X$ emission
D. Mugnai,G. P. Pazzi,P. Fabeni,A. Ranfagni
Physics , 2014,
Abstract: The experimental evidence of an anomalous behavior in the decay times of Tl$^+$-like impurity centers in alkali-halide crystals has generated a revival of interest with respect to these materials. We discuss here about the possibility that the $A_T$ emission of KCl:Tl can be considered as a double emission, namely as a superposition of the $A_T$ and $A_X$ emission bands. The plausibility of this hypothesis is discussed in the light of the available, old and recent, experimental features. A quantitative test of this assumption is performed in the framework of a model which demonstrates to be suitable for interpreting other similar cases.
Absorption of Scintillation Light in a 100 $\ell$ Liquid Xenon$γ$ Ray Detector and Expected Detector Performance
A. Baldini,C. Bemporad,F. Cei,T. Doke,M. Grassi,A. A. Grebenuk,D. N. Grigoriev,T. Haruyama,K. Kasami,J. Kikuchi,A. Maki,T. Mashimo,S. Mihara,T. Mitsuhashi,T. Mori,D. Nicolo`,H. Nishiguchi,W. Ootani,K. Ozone,A. Papa,R. Pazzi,S. Ritt,R. Sawada,F. Sergiampietri,G. Signorelli,S. Suzuki,K. Terasawa,M. Yamashita,S. Yamashita,T. Yoshimura,Yu. Yuri
Physics , 2004, DOI: 10.1016/j.nima.2005.02.029
Abstract: An 800L liquid xenon scintillation $\gamma$ ray detector is being developed for the MEG experiment which will search for $\mu^+\to\mathrm{e}^+\gamma$ decay at the Paul Scherrer Institut. Absorption of scintillation light of xenon by impurities might possibly limit the performance of such a detector. We used a 100L prototype with an active volume of 372x372x496 mm$^3$ to study the scintillation light absorption. We have developed a method to evaluate the light absorption, separately from elastic scattering of light, by measuring cosmic rays and $\alpha$ sources. By using a suitable purification technique, an absorption length longer than 100 cm has been achieved. The effects of the light absorption on the energy resolution are estimated by Monte Carlo simulation.
Search for neutrino oscillations on a long base-line at the CHOOZ nuclear power station
M. Apollonio,A. Baldini,C. Bemporad,E. Caffau,F. Cei,Y. Declais,H. de Kerret,B. Dieterle,A. Etenko,L. Foresti,J. George,G. Giannini,M. Grassi,Y. Kozlov,W. Kropp,D. Kryn,M. Laiman,C. E. Lane,B. Lefievre,I. Machulin,A. Martemyanov,V. Martemyanov,L. Mikaelyan,D. Nicolo,M. Obolensky,R. Pazzi,G. Pieri,L. Price,S. Riley,R. Reeder,A. Sabelnikov,G. Santin,M. Skorokhvatov,H. Sobel,J. Steele,R. Steinberg,S. Sukhotin,S. Tomshaw,D. Veron,V. Vyrodov
Physics , 2003, DOI: 10.1140/epjc/s2002-01127-9
Abstract: This final article about the CHOOZ experiment presents a complete description of the electron antineutrino source and detector, the calibration methods and stability checks, the event reconstruction procedures and the Monte Carlo simulation. The data analysis, systematic effects and the methods used to reach our conclusions are fully discussed. Some new remarks are presented on the deduction of the confidence limits and on the correct treatment of systematic errors.
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