1,721,130 research outputs found
Action research_ London for in-between spaces
No full textThe formal deconstruction of the contemporary metropolis is a direct conseguence of the processes of social and economic transformations currently underway. Its spaces and places are continually subjected to new programs of use, often through processes of spontaneous re-functionalisation. The post-industrial development has led to the genesis of 'undecided, no function related' spaces, which can be called other spaces. These different spaces are a land of refuge for diversity and scenes of solid dynamics.
The paced Age of Access provides a transition from an economy largely dominated by the market and the concepts of goods and propriety to an economy dominated by intangible values such as culture, information and, mainly, relational aspect activator of new qualities within the territory.
The Final design studio, in collaboration with the University of Brighton (UK), Master in Interior Design, worked on six selected in-between urban spaces in the city of London, located east nearby the Olympic site, in a peculiar area in which thresholds and borderlines divide/connect extremely dfferent realities
Action Research_ 100 Virtuous cities.
No full textINNOVATION DESIGN DRIVEN generated by new services for the TRANSIENT CITIZEN, oriented towards preserving the ENVIRONMENTAL QUALITY of the CITY OF THE THIRD MILLENNIUM, for the management, development and the equipment of RESIDUAL URBAN AREAS.
The research program has foreseen the development, for the 100 cities in the world with the most significant number of circulating vehicles, of areas of assistance for the transient users. These areas have been realised re-functionalizing and equipping residual areas that are considered crucial and valuable places and moments for the citizen and the city to generate a diffuse urban quality through the distribution of innovative, high-quality services.
100 Virtuous Cities carries out the contextualisation of innovative design-driven services in these nodal areas by Spatial Design and Product Design interventions [innovative for their attention to reducing the environmental impact and to the moving users], allowing the implementation of a virtuous development linked to the reduction of the use of non-renewable energies along with the recovery of their social and environmental qualities
On the identification of multiple close encounters in the planar circular restricted three-body problem
No full textWe describe a technique which allows us to numerically detect orbits of the planar circular restricted three-body problem with multiple close encounters with the secondary mass for values of the Jacobi constant C < 3 + μ2 - 4μ. We find that these orbits are organized in structures which, on Poincaŕe surfaces of sections, appear as a hierarchy of lobes. The detection of multiple close encounters has implications in cometary dynamics as well as in the study of steroids with potential impact risk with the Earth
Evolution of the tangent vectors and Localization of the stable and unstable manifolds of hyperbolic orbits by Fast Laypunov Indicators
No full textThe fast Lyapunov indicators are functions defined on the tangent fiber of the phase-space of a discrete (or continuous) dynamical system by using a finite number of iterations of the dynamics. In the last decade, they have been largely used in numerical computations to localize the resonances in the phase-space and, more recently, also the stable and unstable manifolds of normally hyperbolic invariant manifolds. In this paper, we provide an analytic description of the growth of tangent vectors for orbits with initial conditions which are close to the stable-unstable manifolds of hyperbolic saddle points. The representation explains why the fast Lyapunov indicator detects the stable-unstable manifolds of all fixed points which satisfy a certain condition. If the condition is not satisfied, a suitably modified fast Lyapunov indicator can be still used to detect the stable-unstable
manifolds. The new method allows for a detection of the manifolds with a number of precision digits which increases linearly with respect to the integration time. We illustrate the method on the critical problems of detection of the so-called tube manifolds of the Lyapunov orbits of L 1 , L 2 in the planar circular restricted three-body problem; detection of the Lorenz manifold; detection of the stable manifold of a saddle equilibrium point for two strongly coupled pendula
First numerical investigation of a conjecture by N. N. Nekhoroshev about stability in quasi-integrable systems
No full textThe characterization of the long-term stability properties of Hamiltonian systems has a big relevance for scientific problems of Celestial Mechanics and Statistical Physics, and also for recent studies of stability in particle accelerators. The celebrated Kolmogorov-Arnold-Moser (KAM) and Nekhoroshev theorems provide fundamental informations: while the KAM theorem establishes the stability of the actions of the systems for infinite times in large measure sets of non resonant initial conditions, the Nekhoroshev theorem establishes the stability in open sets of initial conditions, including the resonances, for times which increase exponentially with respect to an inverse power of the perturbation parameter. The Nekhoroshev theorem applies to analytic perturbations of integrable systems whose Hamiltonian satisfies a non-degeneracy property, called steepness. The simplest examples of steep functions are the convex ones, but many applications to Physics are modeled by perturbation of steep non convex systems. In Nekhoroshev’s 1977 paper, it is conjectured that, among the steep systems with the same number ν of frequencies, the convex ones are the most stable, and it is suggested to investigate numerically the problem. Following this suggestion, we numerically study and compare the diffusion of the actions in quasi-integrable systems, precisely quasi-integrable symplectic maps, with different steepness properties in a large range of variation of the perturbation parameter ɛ and different dimensions of phase space corresponding to ν = 3 and ν = 4 (ν ≤ 2 is not significant for the conjecture). For six dimensional maps (ν = 4), our numerical experiments perfectly agree with the Nekhoroshev conjecture: for both convex and non convex cases, the numerically computed diffusion coefficient D of the actions is compatible with an exponential fit D(ɛ) ∼ exp − (ɛ0/ɛ)β, and the convex case is definitely more stable than the steep one. For four dimensional maps (ν = 3): in the convex case, we provide for the first time a fit of β; in the steep case, D(ɛ) has large oscillations around an exponential behaviour. In this case, the agreement of our numerical experiments with the conjecture is not sharp and requires to consider a sup over different initial conditions
Introdurre la gestione operativa nel cuore pulsante dell'ospedale: attenzione all'efficienza ed appropriatezza di uso della sala operatoria
No full textCarenze e criticità del modello logistico-produttivo a supporto dei processi di cura possono mettere a rischio le performance delle strutture ospedaliere, sia in termini di produttività ed efficienza che di sicurezza e qualità dei servizi erogati al paziente. Appare sempre più importante riuscire ad ottimizzare il funzionamento della macchina produttiva “ospedale”, ovvero ripensare le modalità di organizzazione delle aree produttive e dei processi che concorrono all’erogazione del servizio (i.e. gestione delle operations), soprattutto in un contesto sempre più connotato dallo sviluppo di modelli organizzativi orizzontali volti a porre al centro il paziente. Attraverso un’estesa revisione della letteratura nazionale ed internazionale, sono state identificate le principali esperienze di successo realizzate per il miglioramento delle operations in un’area produttiva leader dell’ospedale, i.e. il blocco operatorio. Nel presente contributo, le esperienze esaminate sono state classificate con riferimento alle quattro leve di azione per l’ottimizzazione dei flussi logistici (cose e persone) in un ospedale: lay-out ed organizzazione degli spazi; dimensionamento e programmazione della capacità produttiva; organizzazione delle attività/processi; tecnologie e sistemi informativi. Dall’analisi delle evidenze risultanti dall’indagine, emergono due aspetti che i manager sono chiamati a presidiare in questo tipo di progetti: le scelte sulle operations devono necessariamente essere (i) integrate all’interno del disegno strategico dell’ospedale e soprattutto (ii) coerenti con il complessivo sistema aziendale
From identity in progress to in-between spaces. The role of spatial design in refiguring the landscape of the diffuse urban realities of postmodernity.
No full textTo act in terms of design on our diffusely developed urbanised realities is something that today needs not a little thought and consideration, starting with a few big questions: who is the man who inhabits these realities? Which society supports them? What type of town or city occupies/characterises them? What are the features of the spaces and environments that define them?
The first challenge for designers of the third millennium could be understanding the real meaning of man, the so-called post-industrial society, the city, and its environments.
The second concrete challenge is to try and respond with the agile tools of design to the densely packed questions posed by the demand and the many opportunities that follow them
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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