The quest for a cryptographically secure pseudorandom bit generator (PRBG) was initiated long ago, and for a long time the proposed pseudorandom generators were very slow. More recently some ..."provably secure" PRBG capable to achieve a throughput rate greater than 1Mbit/sec. We noticed, anyway, the absence of Java implementations of such PRBGs, provably due to poor expected values for throughput rate. In the present paper we show that it is quite easy to write down Java implementations for them, achieving a throughput rae into range \(0,5\div 7\) Mbit/sec on very common mobile low-end devices.
We make a new proposal about how to use in an effective way a CSPRBG (Computationally Secure Pseudo Random Bit Generator) for cryptographic purposes. We introduce the definitions of TCSPRBG (Typical ...CSPRBG) and SCSPRBG (Special CSPRBG). In particular the definition of SCSPRBG synthetizes in a simple way our proposal of how to modify a CSPRBG in order to achieve a higher throughput rate, while retaining some essential features of its computational security. We then summarize which should be, in our opinion, a "standard way" to use a CSPRBG for cryptographic purposes. We eventually present as an application, a particular SCSPRBG for which we can achieve throughput rates greater than \(100\) Mbits/sec on current mobile devices.
The data clustering problem consists in dividing a data set into prescribed
groups of homogeneous data. This is a NP-hard problem that can be relaxed in
the spectral graph theory, where the optimal ...cuts of a graph are related to the
eigenvalues of graph $1$-Laplacian. In this paper, we firstly give new
notations to describe the paths, among critical eigenvectors of the graph
$1$-Laplacian, realizing sets with prescribed genus.
We introduce the pseudo-orthogonality to characterize $m_3(G)$, a special
eigenvalue for the graph $1$-Laplacian. Furthermore, we use it to give an upper
bound for the third graph Cheeger constant $h_3(G)$, that is $h_3(G) \le
m_3(G)$. This is a first step for proving that the $k$-th Cheeger constant is
the minimum of the $1$-Laplacian Raylegh quotient among vectors that are
pseudo-orthogonal to the vectors realizing the previous $k-1$ Cheeger
constants.
Eventually, we apply these results to give a method and a numerical algorithm
to compute $m_3(G)$, based on a generalized inverse power method.
Latin American Macroeconomic Reforms José Antonio González, Vittorio Corbo, Anne O. Krueger, Aaron Tornell / José Antonio González, Vittorio Corbo, Anne O. Krueger, Aaron Tornell
2010
eBook
Hidden behind a number of economic crises in the mid- to late 1990s-including Argentina's headline-grabbing monetary and political upheaval-is that fact that Latin American economies have, generally ...speaking, improved dramatically in recent years. Their success has been due, in large part, to macroeconomic reforms, and this book brings together prominent economists and policymakers to assess a decade of such policy shifts, highlighting both the many success stories and the areas in which further work is needed. Contributors offer both case studies of individual countries and regional overviews, covering monetary, financial, and fiscal policy.Contributors also work to identify future concerns and erect clear signposts for future reforms. For instance, now that inflation rates have been stabilized, one suggested "second stage" monetary reform would be to focus on reducing rates from high to low single digits. Financial sector reforms, it is suggested, should center on improving regulation and supervision. And, contributors argue, since fiscal stability has already been achieved in most countries, new fiscal reforms need to concentrate on institutionalizing fiscal discipline, improving the efficiency and equity of tax collection, and modifying institutional arrangements to deal with increasingly decentralized federal systems.The analysis and commentary in this volume-authored not only by academic observers but by key Latin American policymakers with decades of firsthand experience-will prove important to anyone with an interest in the future of Latin American's continuing economic development and reform.Contributors to this volume: José Antonio González, Stanford University Anne O. Krueger, International Monetary Fund Vittorio Corbo, Pontifical Catholic University, Chile Klaus Schmidt-Hebbel, Central Bank of Chile Alejandro Werner, Bank of Mexico Márcio G. P. Garcia, Pontifical Catholic University, Rio Tatiana Didier, World Bank Gustavo H. B. Franco, former president, Central Bank of Brazil Francisco Gil Díaz, Minister of the Treasury, Mexico Roberto Zahler, former governor, Central Bank of Chile Ricardo J. Caballero, Massachusetts Institute of Technology Philip L. Brock, University of Washington Stephen Haber, Stanford University Pablo E. Guidotti, Universidad Torcuato Di Tella, Buenos Aires Vito Tanzi, International Monetary Fund Enrique Dávila, Ministry of Finance, Mexico Santiago Levy, Mexican Social Security Institute Ricardo Fenochietto, private consultant, Buenos Aires Rogério L. F. Werneck, Pontifical Catholic University, Rio Carola Pessino, Universidad Torcuato di Tella, Buenos Aires Michael Michaely, Hebrew University of Jerusalem
Binomial Measures and their Approximations Francesco Calabrò; Antonio Corbo Esposito; Carmen Perugia
Real analysis exchange,
2012, Letnik:
37, Številka:
1
Journal Article
Recenzirano
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, ODKLJ, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
This paper is focused on the Monotonicity Principle (MP) for nonlinear
materials with piecewise growth exponent. This results are relevant because
enables the use of a fast imaging method based on ...MP, to the wide class of
problems with two or more materials, where at least one is nonlinear.
The treatment is very general and allows to model a wide variety of practical
configurations such as, for instance, Superconducting (SC) or Perfect
Electrical Conducting (PEC) or Perfect Electrical Insulating (PEI) materials.
A key role is played by the average Dirichlet-to-Neumann operator, introduced
in Corbo Esposito et. al, Inverse Problems 2021, where the MP for a single
type of nonlinearity was treated.
Realistic numerical examples confirm the theoretical findings.
The data clustering problem consists in dividing a data set into prescribed groups of homogeneous data. This is a NP-hard problem that can be relaxed in the spectral graph theory, where the optimal ...cuts of a graph are related to the eigenvalues of graph \(1\)-Laplacian. In this paper, we firstly give new notations to describe the paths, among critical eigenvectors of the graph \(1\)-Laplacian, realizing sets with prescribed genus. We introduce the pseudo-orthogonality to characterize \(m_3(G)\), a special eigenvalue for the graph \(1\)-Laplacian. Furthermore, we use it to give an upper bound for the third graph Cheeger constant \(h_3(G)\), that is \(h_3(G) \le m_3(G)\). This is a first step for proving that the \(k\)-th Cheeger constant is the minimum of the \(1\)-Laplacian Raylegh quotient among vectors that are pseudo-orthogonal to the vectors realizing the previous \(k-1\) Cheeger constants. Eventually, we apply these results to give a method and a numerical algorithm to compute \(m_3(G)\), based on a generalized inverse power method.
This paper is focused on the Monotonicity Principle (MP) for nonlinear materials with piecewise growth exponent. This results are relevant because enables the use of a fast imaging method based on ...MP, to the wide class of problems with two or more materials, where at least one is nonlinear. The treatment is very general and allows to model a wide variety of practical configurations such as, for instance, Superconducting (SC) or Perfect Electrical Conducting (PEC) or Perfect Electrical Insulating (PEI) materials. A key role is played by the average Dirichlet-to-Neumann operator, introduced in Corbo Esposito et. al, Inverse Problems 2021, where the MP for a single type of nonlinearity was treated. Realistic numerical examples confirm the theoretical findings.
Starter Cultures in Food Production Barbara Speranza, Antonio Bevilacqua, Maria Rosaria Corbo, Milena Sinigaglia
2017, 2017-01-12, 2017-02-27
eBook
Starter cultures have great significance in the food industry due to their vital role in the manufacture, flavour, and texture development of fermented foods. Once mainly used in the dairy industry, ...nowadays starter cultures are applied across a variety of food products, including meat, sourdough, vegetables, wine and fish. New data on the potential health benefits of these organisms has led to additional interest in starter bacteria. Starter Cultures in Food Production details the most recent insights into starter cultures. Opening with a brief description of the current selection protocols and industrial production of starter cultures, the book then focuses on the innovative research aspects of starter cultures in food production. Case studies for the selection of new starter cultures for different food products (sourdough and cereal based foods, table olives and vegetables, dairy and meat products, fish and wine) are presented before chapters devoted to the role of lactic acid bacteria in alkaline fermentations and ethnic fermented foods. This book will provide food producers, researchers and students with a tentative answer to the emerging issues of how to use starter cultures and how microorganisms could play a significant role in the complex process of food innovation.
