114 research outputs found
Admissibility and Non-Uniform Dichotomy for Differential Systems
No full textThe problem of nonuniform exponential dichotomy of linear differential
systems in Banach spaces is discussed. It is established a connection
between the admissibility of a pair of certain function spaces which are translations
invariant, on one hand, and the nonuniform exponential dichotomy
of differential systems, on the other. Also, Some results due to Hartman,
Massera, Schäffer and Coppel are generalized as well
The Perron Problem for C-Semigroups
No full text<p>Characterizations of Perron-type for the exponential stability of exponentially bounded C-semigroups are given. Also, some applications for the asymptotic behavior of the integrated semigroups are obtained.</p></p
A version of a theorem of R. Datko for nonuniform exponential contractions
No full textAbstractWe point out versions of a well-known theorem of R. Datko for nonuniform exponential contractions. More precisely, we obtain theorems that characterize the nonuniform exponential stability and the nonuniform exponential dichotomy for nonuniform exponential contractions. Thus, we generalize the results in Datko (1972) [8] and Preda and Megan (1985) [14]
Closing remarks and outlook to EOSC 2019: EOSC Launch Event
No full textClosing remarks and outlook to EOSC 2019
Jean-Eric Paquet, Director-General – Directorate „Research and Innovation“ (RTD)
Ciprian Preda, Secretary of State, Romani
Declaration on the European Open Science Cloud: EOSC Launch Event
No full textDeclaration on the European Open Science Cloud
European Commission:
Jean-Eric PAQUET Director-General – Directorate "Research and Innovation" (RTD)
Former Presidency:
Karina Angelieva, Deputy Minister of Education and Science, Bulgaria
Incoming Presidency:
Ciprian Preda, Secretary of State, Romania
Austrian Presidency:
Heinz Faßmann, Minister, Austrian Federal Ministry of Education, Science and Researc
PREDA: An R-package to identify regional variations in genomic data
No full textChromosomal patterns of genomic signals represent molecular ngerprints that may reveal how the local structural organization of a genome impacts the functional control mechanisms. Thus, the integrative analysis of multiple sources of genomic data and information deepens the resolution and enhances the interpretation of stand-alone high-throughput data. In this note, we present PREDA (Position RElated Data Analysis), an R package for detecting regional variations in genomics data. PREDA identies relevant chromosomal patterns in high-throughput data using a smoothing approach that accounts for distance and density variability of genomics features. Custom-designed data structures allow efciently managing diverse signals in different genomes. A variety of smoothing functions and statistics empower exible and robust workows. The modularity of package design allows an easy deployment of custom analytical pipelines. Tabular and graphical representations facilitate downstream biological interpretation of results. © The Author 2011. Published by Oxford University Press. All rights reserved
The Hegemonic Gaze and East-Central Europe - Challenging the Totalitarian Paradigm
Get PDFThe chapter introduces the notion of the "hegemonic gaze" in relation to the representation of East-Central Europe, demonstrating how the artist becomes interpellated as a regional subject, becoming simultaneously included and othered. It begins by examining the complexities involved in defining the region and the power dynamics involved in naming and being named. The author argues that different terms produce specific subject positions, reinforcing certain narratives about the region and foregrounding the end of communism and the failure of the socialist project.
Through the lens of Stuart Hall's theory of encoding and decoding, the chapter explores how exhibitions and artworks depicting socialist monuments and architecture often become simplified and reinterpreted within the global art discourse. The author shows how the ‘‘hegemonic gaze’’ reinforces existing narratives and imposes meanings. Despite artists' efforts to engage with the complexities of the past, their work is often interpellated within predetermined frameworks that limit its interpretation
Lyapunov operator inequalities for exponential stability of Banach space semigroups of operators
No full textAbstractWe obtain continuous-time and discrete-time Lyapunov operator inequalities for the exponential stability of strongly continuous, one-parameter semigroups acting on Banach spaces. Thus we extend the classic result of Datko (1970) [2] from Hilbert spaces to Banach spaces
Adversarial Authorship Attribution in Open-Source Projects
Get PDFOpen-source software is open to anyone by design, whether it is a community of developers, hackers or malicious users. Authors of open-source software typically hide their identity through nicknames and avatars. However, they have no protection against authorship attribution techniques that are able to create software author profiles just by analyzing software characteristics. In this paper we present an author imitation attack that allows to deceive current authorship attribution systems and mimic a coding style of a target developer. Withing this context we explore the potential of the existing attribution techniques to be deceived. Our results show that we are able to imitate the coding style of the developers based on the data collected from the popular source code repository, GitHub. To subvert author imitation attack, we propose a novel author obfuscation approach that allows us to hide the coding style of the author. Unlike existing obfuscation tools, this new obfuscation technique uses transformations that preserve code readability. We assess the effectiveness of our attacks on several datasets produced by actual developers from GitHub, and participants of the GoogleCodeJam competition. Throughout our experiments we show that the author hiding can be achieved by making sensible transformations which significantly reduce the likelihood of identifying the author’s style to 0% by current authorship attribution systems
Lyapunov Theorems for the Asymptotic Behavior of Evolution Families on the Half-Line
No full textAbstractTwo theorems regarding the asymptotic behavior of evolution families are established in terms of the solutions of a certain Lyapunov operator equation.</jats:p
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