1,721,125 research outputs found
La riqualificazione della città di Medelin e l'impiego della pianificazione urbanistica nella prevenzione della criminalità urbana
Full text link[The upgrading of Medellín and the use of urban planning in the prevention of urban
crime] Until a few years ago, Medellín (Columbia) was sadly known as the world
capital of narcotics and characterized by a murder rate and violent crimes really
chilling. In 2013, to great surprise, it was awarded the title of ‘Innovative city of the
year’, assigned by Citigroup, Wall Street Journal and Urban Land Institute.
The city deserved such a definition, thanks to a complex upgrading work that, in the
footsteps of the ever-present Chicago Area project model, has been able to combine
the new planning of architectural interventions with others of a social character.
Particular attention has also been paid to the maintenance of urban furnishings and to
the creation of amenable public recreational areas, such as squares or wide paved
sidewalks, in order to increase the distance and create the so-called ‘natural control’
and the sense of ‘presence of a guardian’, according to the theories of Jacobs,
Newman, Jeffery and all the current of New Urbanism.
As a result, recent statistical surveys, carried out after the upgrading program, have
shown a real decline in violent crime. Improved also appear to the citizens’ sense of
security, the level of quality of life and the contribution of economic resources from
tourism, stimulated by the pleasures of some urban sites now safely walkable.
We are well aware that much remains to be done, nevertheless we considered useful
to show a detailed analysis of the urban redevelopment interventions implemented
and of the planning method, also in order to find out solutions and ways of
intervention that could be usefully applied to the reality of some Italian cities
Bioimmagini
No full textIl ricorso alle immagini è indispensabile in Medicina, per diagnosticare stati patologici, monitorare gli effetti delle terapie e, ancor prima, capire le cause delle malattie. Oggi sono disponibili molte tecniche di immagine. I vari metodi forniscono misure di differenti proprietà fisiche delle strutture: ogni immagine è quindi una rappresentazione parziale della realtà. Alcune tecniche sono in grado di dare informazioni di tipo morfologico con alta definizione (come la DR), altre di tipo funzionale (come la PET o la fMRI). Dopo una presentazione dei fondamenti teorici sulle immagini (caratterizzazione, qualità, trattamento in forma numerica), vengono descritte le più importanti tecniche di generazione di Bioimmagini (con particolare riferimento a quelle tomografiche) e infine introdotti i metodi di visione artificiale per il loro trattamento computerizzato. Questa edizione del libro si propone di fornire un quadro aggiornato che tenga conto della rapida evoluzione delle tecniche di immagini ed è integrata da un CD-ROM con esempi di bioimmagini ottenute con strumentazione moderna
Genetic design of optimum linear and non-linear QRS detectors
No full textThis paper describes an approach to the design of optimum QRS detectors. We report on detectors including a linear or nonlinear polynomial filter, which enhances and rectifies the QRS complex, and a simple, adaptive maxima detector. The parameters of the filter and the detector, and the samples to be processed are selected by a genetic algorithm which minimizes the deletion errors made on a set of reference ECG signals. Three different architectures and the experimental results achieved on the MIT-BIH Arrhythmia Database are described.
This paper describes an approach to the design of optimum QRS detectors. We report on detectors including a linear or nonlinear polynomial filter, which enhances and rectifies the QRS complex, and a simple, adaptive maxima detector. The parameters of the filter and the detector, and the samples to be processed are selected by a genetic algorithm which minimizes the detection errors made on a set of reference ECG signals. Three different architectures and the experimental results achieved on the MIT-BIH Arrhythmia Database are described
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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