177,170 research outputs found
DLP–based cryptosystems with Pell cubics
No full textThe classical Pell equation x
2−dy
2 = 1 can be extended to the cubic case considering
the points (x, y, z) ∈ F
3
such that, for fixed r ∈ F,
x
3 + ry
3 + r
2
z
3 − 3rxyz = 1.
The set of solutions over a finite field Fq equipped with a generalized Brahmagupta product
is a cyclic group for some choices of q and r. In these cases, novel cryptosystems can be built
exploiting the discrete logarithm problem over this group. This paper focuses on the study of
ElGamal-based cryptosystems as well as digital signature schemes with the Pell cubic. Finally,
a comparison in terms of security, data-size and performance among these cryptosystems and
the classical versions with finite fields, elliptic curves and also with Pell conics is provided
La cartografa applicata al progetto di architettura. Selezione delle ricerche principali / Cartographic research applied to Architectural Design. Selection of the main research
No full textOn the cubic Pell equation over finite fields
No full textThe classical Pell equation can be extended to the cubic case considering
the elements of norm one in Z[
√3 r], which satisfy
x
3 + ry
3 + r
2
z
3 − 3rxyz = 1.
The solution of the cubic Pell equation is harder than the classical case, indeed a
method for solving it as Diophantine equation is still missing [3]. In this paper, we
study the cubic Pell equation over finite fields, extending the results that hold for
the classical one. In particular, we provide a novel method for counting the number
of solutions in all possible cases depending on the value of r. Moreover, we are also
able to provide a method for generating all the solutions
Análisis del contenido de sodio y cloruro de sodio en quesos argentinos
No full textFil: Cherubini, Gustavo M. Universidad Nacional de Villa María; Argentina.Fil: Sánchez, Daniela. Universidad Nacional de Villa María; Argentina.Fil: Dutto, Marina del V. Universidad Nacional de Villa María; Argentina.Fil: Gon, Gricelda R. Universidad Nacional de Villa María; Argentina.Fil: Müller, Patricia B. Universidad Nacional de Villa María; Argentina.Fil: Salgado, Franco. Universidad Nacional de Villa María; Argentina.Fil: Perone, Franco A. Universidad Nacional de Villa María; Argentina
Questo libro presenta i risultati di un percorso di ricerca collettivo ... / This book describes the results of a collective research project ..
No full text
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
First report of reticulitermes lucifugus corsicus in the piedmont region of Italy
No full textThe presence of subterranean termites in northern Italy is not common, and generally limited to urban areas where winter microclimatic conditions are milder than in the surrounding natural environment. To date there is only one report of termite presence for Piedmont, doubtfully identified as Reticulitermes lucifugus (Rossi). The present paper relates on the recent finding of Reticulitermes spp. termites in two additional locations, where they caused damage to buildings. Termites were identified as Reticulitermes lucifugus lucifugus (Rossi) and Reticulitermes lucifugus corsicus Clement using mitochondrial DNA analysis. This is the first report of R. lucifugus corsicus in northern Italy. Both infestations could have originated either from human-mediated introduction or from survival of relictual populations
Un approccio multiscalare e multifunzionale. Studio di fattibilità per una ciclovia sul territorio di Mazzè (TO) per la mobilità infracomunale e lo sviluppo turistico.
No full text"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
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