1,721,125 research outputs found
Academic Copyright, Open Access and the “Moral” Second Publication Right
No full textThe Green route to Open Access (OA), meaning the re-publication in OA venues of previously published works, can essentially be executed by contract and by copyright law. In theory, rights retention and contracts may allow authors to re-publish and communicate their works to the public, by means of license to publish agreements or specific addenda to copyright transfer agreements. But as a matter of fact, because authors lack bargaining power, they usually transfer all economic copyrights to publishers. Legislation, which overcomes the constraints of a contractual scheme where authors usually have less bargaining power, may deliver a (digital) second publication or communication right, which this paper discusses in the context of research publications. Outlining the historical and philosophical roots of the secondary publication right, the paper provocatively suggests that it has a “moral” nature that even makes it a shield for academic freedom as well as a major step forward in the overall development of OA
Semigroup estimates and noncoercive boundary value problems
No full textIn this paper we find conditions that guarantee that irregular boundary value problems of the second order for elliptic differential-operator equations with a parameter in an interval are coercive with a defect. We also prove the compactness of the resolvent, estimates with respect to a spectral parameter and the completeness of the system of root functions. We apply these results to find some algebraic conditions that guarantee that irregular boundary value problems of the second order for elliptic partial differential equations with a parameter in cylindrical domains have the same properties. In this paper the regularity of an elliptic boundary value problem is not satisfied on a manifold of dimension equal to the dimension of the boundary. Nevertheless the problem is Fredholm and the resolvent is compact. It is interesting to note that the considered boundary value problems for elliptic equations in a cylinder, though with separable variables, are noncoercive
Separation of two (possibly unbounded) components of the spectrum of a linear operator
No full textLet X be a complex Banach space and A: D(A)→X a densely defined closed linear operator whose resolvent set contains the real line and for which {norm of matrix}λ(λ-A)-1{norm of matrix} is bounded on R. We give a necessary and sufficient condition, in terms of the complex powers of A and -A, for the existence of a decomposition X=X+⊕X-, where X± are closed subspaces, invariant for A, the spectra of the reduced operators A± are {λ∈σ(A);Imλ>0} and {λ∈σ(A);Imλ<0} respectively, and {norm of matrix}λ(λ-A±)-1{norm of matrix} is bounded for Imλ{less-than or greater-than}0. Finally we give an example of an operator in an Lp-type space for which the decomposition exists if 1<+∞ and does not exist if p=1. © 1989 Birkhäuser Verlag
Some results about complex powers of closed operators
No full textThe aim of this paper is to give some further results about complex
powers of operators and in particular about the group of the imaginary powers
On a singular evolution equation in Banach spaces
No full textWe study the differential equation tu′(t) + Au(t) = f(t), 0 < t < ∞, in Banach spaces. We obtain existence and uniqueness theorems for the solutions as well as regularity properties in suitable interpolation spaces. © 1985
On the closedness of the sum of two closed operators
No full textWe find conditions on a Banach space X and on closed linear operators
A and B acting in X, which ensure that A + B is closed.
The result is applied to get maximal regularity in Banach valued L^p spaces for the abstract Cauchy problem
u'=Au+f
u(0)=0
where A is the infinitesimal generator of an analytic semigroup
Academic Copyright, Open Access and the "Moral" Second Publication Right
No full textThe Green route to Open Access (OA), meaning the re-publication in OA venues of previously published works, can essentially be executed by contract and by copyright law. In theory, rights retention and contracts may allow authors to re-publish and communicate their works to the public, by means of license to publish agreements or specific addenda to copyright transfer agreements. But as a matter of fact, because authors lack bargaining power, they usually transfer all economic copyrights to publishers. Legislation, which overcomes the constraints of a contractual scheme where authors usually have less bargaining power, may deliver a (digital) second publication or communication right, which this paper discusses in the context of research publications. Outlining the historical and philosophical roots of the secondary publication right, the paper provocatively suggests that it has a “moral” nature that even makes it a shield for academic freedom as well as a major step forward in the overall development of OA
DOVE INIZIA IL MARE
No full textDocumentario prodotto dall’Osservatorio Coste E Ambiente Naturale Sottomarino (OCEANS) sul “DECALOGO PER LA GESTIONE DELLE SPIAGGE SARDE – COME SALVAGUARDARE E CONSERVARE QUESTO BENE AMBIENTALE” – Atti scientifici e divulgativi Interreg IIIA GERER - Osservatorio Coste E Ambiente Naturale Sottomarino (OCEANS) Palau (OT)
Micropolitica e funzionari genealogisti. La "politica indigena" degli Italiani nel Walqayt
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