5,052 research outputs found
Fundamental and non-fundamental equilibria in the foreign exchange market. A behavioural framework.
Equilibrium; Exchange; Foreign exchange; Framework; Market; Working;
PTV-Stream: A simplified particle tracking velocimetry framework for stream surface flow monitoring
Abstract Particle tracking velocimetry (PTV) is a promising image-based approach for remote streamflow measurements in natural environments. However, most PTV approaches require highly-defined round-shaped tracers, which are often difficult to observe outdoors. PTV-Stream offers a versatile alternative to cross-correlation-based PTV by affording the identification and tracking of features of any shape transiting in the field of view. This nearest-neighbor algorithm is inherently thought for estimating surface flow velocity of streams in outdoor conditions. The procedure allows for reconstructing and filtering the trajectories of features that are more likely to pertain to actual objects transiting in the field of view rather than to water reflections. The procedure is computationally efficient and is demonstrated to yield accurate measurements even in case of downsampled image sequences
La valutazione economica dei Piani Urbani della MobilitĂ Sostenibile. Il caso di Milano
La tendenza emergente nella pianificazione dei trasporti a livello urbano Ăš quella che adotta lâapproccio dei PUMS, cioĂš i Piani Urbani della MobilitĂ Sostenibile. Essi superano lâapproccio tradizionale di piano, introducendo, oltre ai concetti di sostenibilitĂ , anche quelli di una pianificazione integrata e della valutazione delle politiche di trasporto adottate.
Il presente articolo intende fornire un contributo relativamente allâintegrazione delle tecniche di valutazione socio-economica, quali lâAnalisi Costi Benefici, nei PUMS, cioĂš in strumenti di programmazione complessi e formati da politiche ed azioni molto eterogenee e di articolata modellizzazione.
Lâarticolo discute inizialmente in termini generali la complessitĂ legata allâintegrazione tra piani e valutazione, per poi mostrare i contenuti di un recente esempio, cioĂš il PUMS della cittĂ di Milano. Attraverso esso si discuteranno i modi con cui si Ăš operata lâintegrazione del modello di simulazione con lo strumento per lâAnalisi Costi Benefici, e verranno presentati alcuni strumenti innovativi di rappresentazione dei risultati, utili alla comunicazione dei contenuti tecnici dellâanalisi al piĂč ampio pubblico dei decisori e dei cittadini
Leader as Policy Device: The Hybridization of Head Teachers in Italy
The aim of this article is to show how educational policies in Italy in the last 15 years have conceived headship as a «lever of change», producing a sort of «subjection» which implies a remarkable hybridization of the role. The ongoing pressures on policymaking by «noneducational» actors are depicted as a feature of the Italian policies on the restructuring of school governance and headship. The topics presented are based on researches carried out in recent years and focusing on the training, selection and evaluation of Italian head teachers.
The article is structured as follows. Firstly, we present the theoretical framework based on the conceptual tools of discourse and governance. Secondly, we offer a brief outline on
how head teachers were «formed» as educators before the 1997 Autonomy Reform. In the final section, some tensions that emerge during the discussions on headship are presented by
analysing a particular set of «technologies» such as training, selection and evaluation that aim to «S-Objectivate» specific head teachers. The analysis will allow us to shed light on
what we think of as an invisible and politically remarkable dilemma that is at stake here: «headship as a managerialist device to âcontrolâ education policies»
Privatising education policy-making in Italy: New governance and the reculturing of a welfarist education state
Philanthropies and private foundations are increasingly acting as key nodes of the policy assemblages through which neoliberal and neomanagerialist policies are entering the field of education in Italy. In a country where public school 'ineffectiveness' and 'resistance to innovation' are taken for granted nowadays, policy philanthropists-entrepreneurs are attempting to lead the way in re-thinking education according to the new globalised economic imperatives. Starting from the ongoing 'evaluation turn' of the Italian education system, the article unravels the complexities of those processes of policy influence. The analysis addresses multiple foci: the emergence of new discourses of education reform and the networks of social interaction they are rooted in; the generative effects such discourses can have on producing new positions, subjectivities, opportunities; and the structural selectivities influencing education policy-making. The article highlights the first moves of a peculiar process of 'policy privatisation' whose main potential outcomes are both a process of education policy-making privatisation and a reculturing of education according to a new private-business ethos. Keywords: policy privatisation, philanthropy, education governance, neoliberalism, NPM, Italy (Published: 16 September 2013) Citation: Education Inquiry (EDUI) 2013, 4 , 22615, http://dx.doi.org/10.3402/edui.v4i3.2261
Per un pugno di opere
La svolta decisa dal governo per le infrastrutture medie e piccole dovrebbe essere adottata anche per quelle grandi, abbandonando cosĂŹ
lâidea che le opere âstrategicheâ generino una forte domanda. Altrimenti, dovremo rassegnarci ai cantieri âstop and goâ. E al moltiplicarsi dei
costi
Study of pressure effect on the magnetic penetration depth in MgB
A study of the pressure effect on the magnetic penetration depth in
polycrystalline MgB was performed by measuring the temperature dependence
of the magnetization under an applied pressure of 0.15 and 1.13 GPa. We found
that at low temperature is only slightly affected by pressure
[], in contrast to cuprate
superconductors, where, in the same range of pressure, a very large effect on
was found. Theoretical estimates indicate that most of the
pressure effect on in MgB arises from the electron-phonon
interaction.Comment: 5 pages, 2 figure
Tav e grandi opere: non Ăš solo un problema di costi
Le grandi opere non solo costano tanto, ma sono spesso inutili. Per giustificarle ci si affida a previsioni di aumento del traffico poco
realistiche. Sono necessarie analisi costi-benefici terze, indipendenti e interamente riproducibili
Nonadiabatic Superconductivity and Vertex Corrections in Uncorrelated Systems
We investigate the issue of the nonadiabatic superconductivity in
uncorrelated systems. A local approximation is employed coherently with the
weak dependence on the involved momenta. Our results show that nonadiabatic
vertex corrections are never negligible, but lead to a strong suppression of
with respect to the conventional theory. This feature is understood in
terms of the momentum-frequency dependence of the vertex function. In contrast
to strongly correlated systems, where the small -selection probes the
positive part of vertex function, vertex corrections in uncorrelated systems
are essentially negative resulting in an effective reduction of the
superconducting pairing. Our analysis shows that vertex corrections in
nonadiabatic regime can be never disregarded independently of the degree of
electronic correlation in the system.Comment: 4 pages, 3 eps fig
- âŠ