1,544 research outputs found
Stability of front tracking solutions to the initial and boundary value problem for systems of conservation laws
No full textWe deal with the non characteristic initial and boundary value problem
for an strictly hyperbolic system of conservation laws in
one space dimension
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\partial_t u+ \partial_x F(u)=0,\qquad u(0,x) = \bar u (x)\,,\qquad
b\big( u(\psi(t),t) \big) = g(t)\,.\eqno (\ast)
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Here is a smooth vector field defined in an open, convex
neighborhood of the origin of , and are
functions with small total variation, is a non
characteristic Lipschitz boundary profile, and a
function. We prove that the front tracking solutions to ()
constructed by D. Amadori in \cite{Amadori} are stable for the
\elleuno topology. This implies the existence of a Standard Riemann
Semigroup and hence the well-posedness of ()
Landscape in Spatial Planning: Some Evidence on Methodological Issues and Political Challenges
No full textIn recent decades, the landscape has given a new impulse to the renewal of spatial planning. This process has nevertheless raised several methodological issues about how to deal with sensitive non-functional aspects in spatial planning tools and procedures, as well as new challenges for policy design. Placemaking, landscape urbanism, and landscape planning do not differ just in scale but in their very idea of public/collective interest and the action that is required to reach them. Reflecting on some evidence from the recent Italian experience of landscape plans and policies, based on direct involvement in practice and academic debate, the author will highlight several main issues at stake today in this field. The conclusions will argue some potentially promising innovation perspectives, on both processes and contents regarding landscape-based spatial planning and policies, as well as some critical conditions of an institutional context
Governance e paesaggi: qualche considerazione a partire da un’esperienza di ricerca nell’eporediese
No full text
Cultural and gender politics in a neglected archive of Jamaican women's poetry : Una Marson and her Creole contemporaries
No full textThis thesis considers the gender and cultural politics of selected Jamaican
women's poetry published during the first half of the twentieth century and
seeks to establish that an approach to this poetry sensitive to these issues will
illuminate aspects of their work previously neglected by canonical and colonial
modes of interpretation. The central interest of this thesis is the poetry of Una
Marson, a black woman poet whose work has been critically neglected and
devalued to date. My project is to read Marson's work in some detail, and to
explore to what extent her poetry, which often works within colonial models and
with conventional notions of feminine fulfilment, employs received aesthetic
and ideological paradigms both strategically and subversively. In the belief
that critics of Jamaican women's writing should be as attentive to the gender
and cultural politics of their ways of reading, as of the texts they wish to read,
the first chapter of this thesis engages in a sustained analysis of theoretical
positions and attempts to map out the various problems and possibilities
which critical discourses present in relation to this material. The second
chapter examines the various social and literary contexts in which Jamaican
poetry was produced and received during this period, and the third chapter
looks in more detail at contemporary notions of aesthetic and cultural forms.
The fourth and fifth chapters are structured aromd close textual readings
which explore the variety and complexity of Marson's, and her Creole
contemporaries', poetic engagement with the issues of cultural and gender
identities. The thesis concludes that Marson's poetry questions dominant
notions both of identity and of aesthetics, and consequently that her poetry
offers an example of Jamaican literary expression which moves beyond the
nationalization of consciousness which has come to mark the literary
achievement of this period
On the convergence rate for the Glimm scheme
No full textWe consider a Cauchy problem for a strictly hyperbolic,
quasilinear system in one space dimension , where the
matrix valued map is smooth and with non genuinely nonlinear
characteristic fields.
We introduce a Glimm type functional, quadratic in
the sizes of waves whose strengths are smaller than some
fixed threshold parameter. Next, we investigate the rate of
convergence of approximate solutions constructed via
the Glimm scheme. Moreover, we give a conjecture on the rate
of convergence without any additional assumption on beyond
the strict hyperbolicity and regularity
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