4,228 research outputs found
Toxocariasi oculare nel coniglio: infestazione sperimentale. D. Piergili Fioretti, A. Moretti, I. Tomassoni, V. Grelloni.
No full textFrame functions in finite-dimensional quantum mechanics and its Hamiltonian formulation on complex projective spaces
No full textThis work concerns some issues about the interplay of standard and geometric (Hamiltonian) approaches to finite-dimensional quantum mechanics, formulated in the projective space. Our analysis relies upon the notion and the properties of so-called frame functions, introduced by Gleason to prove his celebrated theorem. In particular, the problem of associating quantum states with positive Liouville densities is tackled from an axiomatic point of view, proving a theorem classifying all possible correspondences. A similar result is established for classical-like observables (i.e. real scalar functions on the projective space) representing quantum ones. These correspondences turn out to be encoded in a one-parameter class and, in both cases, the classical-like objects representing quantum ones result to be frame functions. The requirements of U(n) covariance and (convex) linearity play a central role in the proof of those theorems. A new characterization of classical-like observables describing quantum observables is presented, together with a geometric description of the C*-algebra structure of the set of quantum observables in terms of classical-like ones
-dimensional black hole background
No full textThe behavior of a quantum scalar field is studied in the metric ground state of the (2+1)-dimensional black hole of Ba~nados, Teitelboim and Zanelli which contains a naked singularity. The one-loop BTZ partition function and the associate black hole effective entropy, the expectation value of the quantum fluctuation as well as the renormalized expectation value of the stress tensor are explicitly computed in the framework of the -function procedure. This is done for all values of the coupling with the curvature, the mass of the field and the temperature of the quantum state. In the massless conformally coupled case, the found stress tensor is used for determining the quantum back reaction on the metric due to the scalar field in the quantum vacuum state, by solving the semiclassical Einstein equations. It is finally argued that, within the framework of the 1/N expansion, the Cosmic Censorship Hypothesis is implemented since the naked singularity of the ground state metric is shielded by an event horizon created by the back reaction
International and Interdisciplinary Conference IMMAGINI? Image and Imagination between Representation, Communication, Education and Psychology
No full textTerremoto in Emilia Romagna (2012): le attività del Centro Operativo Emergenza Sismica
No full textCome definito negli accordi riportati nell’ambito della Convenzione1 esistente tra l’Istituto Nazionale di Geofisica e Vulcanologia (INGV) e il Dipartimento di Protezione Civile (DPC), a poche ore dal forte terremoto che nella notte del 20 maggio 2012 ha colpito una vasta area dell’Emilia [Moretti et al., 2012; 2013a], è stato attivato il Pronto Intervento Sismico dell’INGV [Govoni et al., 2008; Moretti e Govoni, 2011; Moretti et al., 2010c]. Durante la prima settimana dell’emergenza l’obiettivo principale della struttura emergenziale INGV ha riguardato il miglioramento del monitoraggio sismico; sono state quindi attivate le reti sismiche mobili [maggiori dettagli in Moretti et al., 2012; 2013a] con il fine di integrare le stazioni permanenti della Rete Sismica Nazionale [RSN, Amato e Mele, 2008; Delladio et al., 2011].
Solo in una secondo momento, dopo circa 10 giorni dall’inizio della sequenza sismica è stato ufficialmente attivato il Centro Operativo Emergenza Sismica [COES, Moretti et al., 2010a], a seguito del decreto del Capo del DPC, con il quale è stata costituita la Direzione di Comando e Controllo (Di.Coma.C.2) presso l’Agenzia della Protezione Civile Regionale dell’Emilia Romagna (AgDPC) in Bologna. L’allestimento e il coordinamento del COES sono stati realizzati grazie alla collaborazione tra il Centro Nazionale Terremoti (CNT), a cui afferisce la struttura, e la Sezione INGV di Bologna, sita nel capoluogo della regione colpita dall’emergenza.
In questo lavoro saranno descritte le modalità, le tempistiche e l’impegno di personale che hanno permesso e garantito l'attivazione e il buon funzionamento del COES.Published1-381.1. TTC - Monitoraggio sismico del territorio nazionaleN/A or not JCRope
La comunicazione in sanità = Communication in health
No full textLa comunicazione in sanità è un tema emergente e in continua evoluzione che assume nel tempo sempre più aspetti e concetti nuovi. Obiettivo del lavoro è quello di presentare, attraverso una revisione narrativa, i più importanti aspetti della comunicazione in ambito sanitario. La comunicazione in sanità viene tradizionalmente intesa come quella interpersonale tra sanitario e paziente. In realtà essa include anche quella pubblica con la popolazione nel suo complesso (per es., attraverso i media) o con i suoi rappresentanti, nonché con gli utenti del servizio sanitario (per es., gestione dei reclami). Inoltre, essa promuove sia la responsabilità sociale, in quanto indirizza le istituzioni, il terzo settore e le aziende profit verso i valori della coesione sociale e dello sviluppo sostenibile, sia l’empowerment del cittadino. Adeguate strategie di comunicazione possono, infatti, contribuire a ridurre le barriere ambientali, culturali e socioeconomiche che ostacolano la conoscenza e l’adozione consapevole di comportamenti favorevoli alla salute.Communication in health is an emerging and constantly evolving topic, taking more and more new aspects and concepts over time. The objective of this work is to present, through a narrative review, the most important aspects of communication in health field. Communication in health traditionally is known as interpersonal communication between health care workers and patients. In reality, it also includes the community one with the population (e.g., through the media), as well as with users of health service (e.g., complaint management). Moreover, it promotes both social responsibility and citizen's empowerment because communication directs the institutions, the third sector and the profit companies towards the values of social cohesion and sustainable development. Adequate communication strategies can contribute to reduce the environmental, cultural and socio-economic barriers that hinder the knowledge and the conscious adoption of be-haviours that promote health
Biophysical stimulation of the knee with PEMFs: from bench to bedside
No full text: Clinical biophysics investigates the relationship between non-ionizing physical energy and the human body. Although several types of electrical stimulation devices have received US FDA approval for orthopaedic application, the use of Pulsed Electromagnetic Field (PEMFs) play a central role in joint biophysics. This narrative review aims to summarize the current evidences on the efficacy of PEMF-therapy in the treatment of knee articular diseases. Preclinical studies have assessed the effects of PEMFs on chondrocytes, synoviocytes, articular cartilage explants and animal models, showing positive effects of PEMF-therapy on cells proliferation, extracellular matrix (ECM) production, chondrocytes apoptosis and inflammatory cytokines down-regulation. Currently, PEMF-therapy is a valid option in the conservative management of several knee articular diseases, including early OA, patellofemoral pain syndrome and SONK. PEMFs could be also used as an adjunct after an arthroscopic knee procedure or TKA implantation, in order to control the joint post-operative inflammatory state
Novel directions in the study of osteoporosis: focus on gut microbiota as a potential therapeutic target.
No full textOsteoporosis is a significant social health problem, not only in terms of pain and disability but also in terms of mortality rate. In recent years, there is an increasing interest in studying the relationship between gut dysmicrobiosis, immune system and bone health, therefore the term "osteomicrobiology" has been recently coined. This review aims to summarize the current knowledge about the link between gut dysbiosis and osteoporosis, in order to define a potential preventive and therapeutic strategy. Gut microbiota (GM) plays a major role in maintaining body homeostasis, since it is involved in several physiological processes; in recent years, the gut microbiota has shown to modulate not only local processes but also systemic responses including bone metabolism. Several potential mechanisms may explain how gut microorganisms could affect bone metabolism, i.e. influencing the host metabolism, immune system and hormone secretion. The relationship between gut dysbiosis, immunological dysfunction and bone loss could be explained by mainly focusing on T cells. Moreover, it should be noted that the relationship between GM and the endocrine system could also explicate how the microbiome influences bone status. In this context, Insulin-Like Growth Factor-1 (IGF-1), vitamin D, serotonin and leptin might play a central role. GM could have a significant impact on bone metabolism, therefore future clinical studies are necessary to develop a new multidisciplinary approach for osteoporosis treatment and prevention
Low-Complexity Neural Network-Based Processing Algorithm for QCM-D Signals
No full textThis paper introduces a novel approach to estimate the oscillation frequency and decay time constant of Quartz Crystal Microbalance with Dissipation monitoring (QCM-D) signals using low-complexity neural network models. The proposed method involves a two-step process: frequency domain preprocessing using Fast Fourier Transform (FFT) followed by a shallow neural network for frequency estimation, and time domain preprocessing for envelope detection followed by a second shallow neural network for time constant estimation. The networks were trained and tested on datasets from both a dedicated QCM-D testbench and a numerical simulator. The results demonstrate accurate estimation with errors below 10 Hz for the frequency and 1 μs for the time constant, making the approach promising for various QCM-D applications. The simplicity of the neural network models facilitates the implementation on embedded platforms, reducing the system complexity and offering potential for cost-effective QCM-D sensing systems
A análise da linguagem matemática como elemento para pensar o ensino e a aprendizagem da prática de esboço de curvas no ensino superior: Adriano Luiz dos Santos Né ; orientador, Méricles Thadeu Moretti
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Florianópolis, 2013Na presente pesquisa tenho a intenção de realizar uma investigação a respeito do processo de ensino e aprendizagem da prática de esboço de curvas do ensino superior, particularmente na disciplina de Cálculo. Para tal tarefa, buscarei estudar o uso que se faz da linguagem matemática em sala de aula, tomando como estudo de caso uma turma de estudantes da disciplina Cálculo A, da Universidade Federal de Santa Catarina. Nesta investigação, utilizarei-me de ferramentas teóricas fornecidas pela Teoria dos Registros de Representação Semiótica, de Raymond Duval, e o Enfoque Ontosemiótico, de Juan Dìaz Godino, o que atribui a esta pesquisa uma perspectiva semiótica da atividade matemática. A articulação que pretendo realizar com estas teorias parece fornecer informações importantes a respeito da prática matemática realizada pelos estudantes em sala de aula e a prática que a academia tem a intenção de ensinar, o que possibilita um meio de compará-las para então se intervir no processo de ensino e aprendizado da prática de esboço de curvas.Abstract : In this research I intend to conduct a investigation about the process of teaching and learning in the sketching curves practice on the higher education, particularly in the Calculus' discipline. For such task, I seek study the use made of mathematical language in the classroom, taking as case study a students' class of Calculus A discipline, from the Federal University of Santa Catarina (Brazil). In this research, I will use the theoretical tools provided by the Registers of Semiotic Representation's Theory, by Raymond Duval, and the Ontosemiotic Approach, by Juan Dìaz Godino, which attaches to the research a semiotic perspective of mathematical activity. The articulation that I intend to accomplish with these theories seem to provide important information about the mathematical practice performed by students in the classroom and the practice that the academy intends to teach, which provides a means to compare them and so intervene in the process of teaching and learning on the sketch curves practice
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