74,583 research outputs found
Review of "Dictionnaire des philosophes fran��ais du XVIIe si��cle: Acteurs et r��seaux du savoir" edited by Luc Foisneau.
No full textLuc Foisneau, ed. Dictionnaire des philosophes fran��ais du XVIIe si��cle: Acteurs et r��seaux du savoir. Paris: Classiques Garnier, 2021. 2100 pp. 89.60���. Review by Erec R. Koch, The Graduate Center, The City University of New York
Jean-Luc Godard and the other history of cinema
No full textJean-Luc Godard's Histoire(s) du cinema (1988-1998) is a video work made up of visual and verbal quotations of hundreds of images and sounds from film history. But rather than simply telling (hi)stories of cinema, Godard makes a case for cinema as a tool for performing the work of history. This is partly because the film image, by virtue of always recording more of the real than was anticipated or intended, necessarily has history itself inscribed within its very fabric. It is also because montage, as the art of combining discrete elements in new ways in order to produce original forms, can be seen as a machine for realising historical thought. This thesis examines these ideas by discussing Godard's account of the role of cinema in the Second World War, and by analysing some of his recent work as examples of historical montage which attempt to criticise our current political climate through comparison with earlier eras.
After a first chapter which sets out Godard's argument through an extensive commentary of Histoire(s) 1A and B, a second chapter discusses Godard's depiction of the invention of cinema and traces a complex argument about technology and historical responsibility around the key metaphorical figure of the train. Chapter 3 explores the ways in which Godard's historical approach to cinema allows him to maintain a critical discourse with regard to the geopolitical realities of late twentieth-century Europe (Germany, the Balkans), but also to the communications and business empires that have developed over the past few decades. A final chapter offers a detailed consideration of the nature of Godard's cinematic quotation and seeks to explicate the apocalyptic rhetoric of his late work. Aside from Histoire(s) du cinema, films discussed include Nouvelle Vague (1990), Allemagne neuf zero (1991), For Ever Mozart (1996) and Eloge de l'amour (2001)
Authorship in the Interstices of History, Biography, Reality and Memory: Histoire(s) du cinéma and Cabra Marcado para Morrer
No full textEste artigo contrasta Histoire(s) du cinéma de Jean-Luc Godard e Cabra Marcado Para Morrer de Eduardo Coutinho, estão engajadas com a questão da autoria no cinema. Enquanto a imagem de Godard enfatiza a capacidade que tem um filme de transmitir a visão de mundo pessoal de um artista, a presença de Coutinho na tela funciona menos como um meio de subjetivar a obra do que como um catalizador instigando cetas reações nos "atores" filmados
Scalability and robustness of a market-based network resource allocation system
No full textIn this paper, we consider issues related to scalability and robustness in designing a market-based multi-agent system that allocates bandwidth in a communications network. Specifically, an empirical evaluation is carried out to assess the system performance under a variety of design configurations in order to provide an insight into network deployment issues. This extends our previous work in which we developed an application that makes use of market-based software agents that compete in decentralised marketplaces to buy and sell bandwidth resources. Our new results show that given a light to moderate network traffic load, partitioning the network into a few regions, each with a separate market server, gives a higher call success rate than by using a single market. Moreover, a trade-off in the number of regions was also noted between the average call success rate and the number of messages received per market server. Finally, given the possibility of market failures, we observe that the average call success rates increase with an increasing number of markets until a maximum is reached
Standardisation of Provenance Systems in Service Oriented Architectures --- White Paper
No full textThis White Paper presents provenance in computer systems as a mechanism by which business and e-science can undertake compliance validation and analysis of their past processes. We discuss an open approach that can bring benefits to application owners, IT providers, auditors and reviewers. In order to capitalise on such benefits, we make specific recommendations to move forward a standardisation activity in this domain
The Foundations for Provenance on the Web
No full textProvenance, i.e., the origin or source of something, is becoming an important concern, since it offers the means to verify data products, to infer their quality, to analyse the processes that led to them, and to decide whether they can be trusted. For instance, provenance enables the reproducibility of scientific results; provenance is necessary to track attribution and credit in curated databases; and, it is essential for reasoners to make trust judgements about the information they use over the Semantic Web. As the Web allows information sharing, discovery, aggregation, filtering and flow in an unprecedented manner, it also becomes very difficult to identify, reliably, the original source that produced an information item on the Web. Since the emerging use of provenance in niche applications is undoubtedly demonstrating the benefits of provenance, we contend that provenance can and should reliably be tracked and exploited on the Web, and we survey the necessary foundations to achieve such a vision. Using multiple data sources, we have compiled the largest bibliographical database on provenance so far. This large corpus allows us to analyse emerging trends in the research community. Specifically, using the CiteSpace tool, we identify clusters of papers that constitute research fronts, from which we derive characteristics that we use to structure our foundational framework for provenance on the Web. We note that such an endeavour requires a multi-disciplinary approach, since it requires contributions from many computer science sub-disciplines, but also other non-technical fields given the human challenge that is anticipated. To develop our vision, it is necessary to provide a definition of provenance that applies to the Web context. Our conceptual definition of provenance is expressed in terms of processes, and is shown to generalise various definitions of provenance commonly encountered. Furthermore, by bringing realistic distributed systems assumptions, we refine our definition as a query over assertions made by processes. Given that the majority of work on provenance has been undertaken by the database, workflow and e-science communities, we review some of their work, contrasting approaches, and focusing on important topics we believe to be crucial for bringing provenance to the Web, such as abstraction, collections, storage, queries, workflow evolution, semantics and activities involving human interactions. However, provenance approaches developed in the context of databases and workflows essentially deal with closed systems. By that, we mean that workflow or database management systems are in full control of the data they manage, and track their provenance within their own scope, but not beyond. In the context of the Web, a broader approach is required by which chunks of provenance representation can be brought together to describe the provenance of information flowing across multiple systems. This is the specific purpose of the Open Provenance Vision, which is an approach that consists of controlled vocabulary, serialization formats and interfaces that allow the provenance of individual systems to be expressed, connected in a coherent fashion, and queried seamlessly. In this context, the Open Provenance Model is an emerging community-driven representation of provenance, which has been actively used by some twenty teams to exchange provenance information according to the Open Provenance Vision. Having identified an open approach and a model for provenance, we then look at techniques that have been proposed to expose provenance over the Web. We also study how Semantic Web technologies have been successfully exploited to express, query and reason over provenance. Symmetrically, we also identify how Semantic Web technologies such as RDF underpinning the Linked Data effort bring their own difficulties with respect to provenance. A powerful argument for provenance is that it can help make systems transparent, so that it becomes possible to determine whether a particular use of information is appropriate under a set of rules. Such capability helps make systems and information accountable. To offer accountability, provenance itself must be authentic, and rely on security approaches that we review. We then discuss systems where provenance is the basis of an auditing mechanism to check past processes against rules or regulations. In practice, not all users want to check and audit provenance, instead, they may rely on measures of quality or trust; hence, we review emerging provenance-based approaches to compute trust and quality of data
A cryptanalytic attack on the LUC cryptosystem using continued fractions
No full textThe LUC cryptosystem is a modification of the RSA cryptosystem based on Lucas sequences.
In this paper we extend the Verheul - van Tilborg and Dujella variants
of the Wiener attack on RSA to the LUC cryptosystem. We describe an
algorithm for finding a secret key of the form , for some and nonnegative integers and , using continued fractions.
We derive bounds for and using results on Diophantine approximations
G. J. M. Bartelink, Quelques observations sur ΠΑΡΡΗΣΙΑ dans la littérature paléo-chrétienne ; L. J. Engels, Fiducia : influence de l'emploi juridique sur l'usage commun et paléo-chrétien ; A. A. R. Bastiaensen cm., L'Église à la conquête de sa liberté. Recherches philologiques dans le Sacramentaire de Vérone
No full textVerheijen Luc. G. J. M. Bartelink, Quelques observations sur ΠΑΡΡΗΣΙΑ dans la littérature paléo-chrétienne ; L. J. Engels, Fiducia : influence de l'emploi juridique sur l'usage commun et paléo-chrétien ; A. A. R. Bastiaensen cm., L'Église à la conquête de sa liberté. Recherches philologiques dans le Sacramentaire de Vérone. In: L'antiquité classique, Tome 40, fasc. 2, 1971. p. 754
Thermal expansion anomalies of R(Fe, M)(12) (R=Y, Nd; M=Mo and Si)
No full textStructural and thermal-expansion anomaly studies on R(Fe,M)(12) (R=Nd and and Y, M=Mo and Si) compounds were performed by x-ray diffraction. Mo atoms occupy the 8i site. While Si atoms occupy the 8f and 8j sites but not the 8i site. Thermal-expansion anomaly shows only in ab plane in the Mo compounds, while becomes very weak and along with only the c axis in the Si compounds. The anomaly was attributed to the contribution of the interactions of short Fe-Fe distances similar to the previous explanation on other R-Fe intermetallics and that of other strongly positive interactions such as 8j-8j. (c) 2005 American Institute of Physics.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000230168300025&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Physics, AppliedSCI(E)EICPCI-S(ISTP)
Expression of the anti-apoptotic bfl-1/A1 gene is regulated by the Epstein Barr virus nuclear antigen 2(EBNA2)
No full textThe ubiquitous and oncogenic human herpesvirus Epstein-Barr virus (EBV) establishes a latent infection and promotes the long-term survival of the infected host cell by targeting the molecular machinery that controls cell fate decisions (apoptosis, proliferation and differentiation). These host-virus interactions are likely to play a crucial role in the development of EBV-associated malignancies mcludmg African endemic Burkitf s lymphoma, nasopharyngeal carcinoma, Hodgkin’s disease and lymphoprohferative disorders in immunodeficient individuals We have previously shown that (1) EBVmfected Burkitt’s lymphoma cell lines exhibit elevated levels of expression of the antiapoptotic bfl-\ gene (also known as A l) compared to their uninfected counterparts, (11) ectopic expression of Bfl-1 can protect a Burkitt’s lymphoma (BL) cell line from apoptosis induced by serum deprivation (D’Souza, B , Rowe, M and Walls, D 2000 J Virol, 74, 6652) and (m) the EBV Latent Membrane Protein 1 (LMP1) stimulates bfl-1 promoter activity through interactions with components of the cellular Tumour Necrosis Factor Receptor (TNFR/CD40)-signallmg pathway by a mechanism which includes an essential role for the transcription factor NFkB (D’Souza et al, submitted) Bfl-1 is an anti-apoptotic protein of the Bcl-2 family, whose preferential expression in hematopoietic and endothelial cells is controlled by inflammatory stimuli. This study reports the novel finding that the EBV nuclear antigen 2 (EBNA2), a second major effector of phenotypic change m EBV-infected cells, can independently upregulate bfl-1 mRNA levels m BL cell lines. This thesis presents the novel finding that EBNA2 regulates bfl-1 promoter activity through interactions with components of the cellular Notch signalling pathway EBNA2-mediated /ram-activation of bfl-1 is dependent upon its ability to bind CBF1 (a nuclear component of the Notch signalling pathway) and involves a novel CBF-l-hke binding site on the bfl-1 promoter This EBNA2-mediated effect on bfl-1 is modulated by other EBV latent proteins that are known to co-operate with EBNA2 (EBNA-LP) or which have been shown to interact with the CBF1 -co-repressor complex (EBNA3A, 3B, 3C and RPMS) These findings are relevant to our understanding of EBV persistence, its role m malignant disease, and the B cell developmental proces
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