The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Georg Buss - One of the best experts on this subject based on the ideXlab platform.
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Trust issues in Web service Mash-ups
First Monday, 2011Co-Authors: Kevin Lee, Nicolas Kaufmann, Georg BussAbstract:With the emergence of Web service Mash-ups (Web applications that integrate different data sources), online data integration and aggregation is increasingly becoming the online norm for both commercial and non-commercial users. With such widespread adoption of data integration from discrete sources, the question emerges as to whether the resultant Mash-up can be considered as trustworthy. This paper explores the concepts behind Web service Mash-ups to determine the factors influencing their trustworthiness. The focus is on examining data quality and data assurance issues for both the data providers and the Mash-up consumers.
Kevin Lee - One of the best experts on this subject based on the ideXlab platform.
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Trust issues in Web service Mash-ups
First Monday, 2011Co-Authors: Kevin Lee, Nicolas Kaufmann, Georg BussAbstract:With the emergence of Web service Mash-ups (Web applications that integrate different data sources), online data integration and aggregation is increasingly becoming the online norm for both commercial and non-commercial users. With such widespread adoption of data integration from discrete sources, the question emerges as to whether the resultant Mash-up can be considered as trustworthy. This paper explores the concepts behind Web service Mash-ups to determine the factors influencing their trustworthiness. The focus is on examining data quality and data assurance issues for both the data providers and the Mash-up consumers.
Alexandra L. Joyner - One of the best experts on this subject based on the ideXlab platform.
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Essential role of Mash-2 in extraembryonic development
Nature, 1994Co-Authors: Francois Guillemot, Andras Nagy, Anna Auerbach, Janet Rossant, Alexandra L. JoynerAbstract:THE outer layer of the blastocyst, or trophectoderm, is the first cell lineage to differentiate in the mouse embryo1,2, but little is known about the genetic control of its development. Lineage-specific transcription factors may be important in lineage specification, and the product of the Mash-2 gene3,4 fulfils the criteria for such a factor. Mash-2 is a mammalian member of the achaete-scute family5–7 which encodes basic-helix–loop–helix transcription factors8 and is strongly expressed in the extraembryonic tropho-blast lineage. Mash-2 transcripts are found in the female germ line and in the embryo throughout preimplantation development, but are highly expressed later only in the ectoplacental cone, the chor-ion and their derivatives in the placenta. Mash-2 transcripts are not found in primary and secondary giant cells, yolk sac or allantois at any post-implantation stage, and are present only transiently and at low levels in the embryo during gastrulation. To analyse the role of Mash-2 in development, we have used gene targeting to generate mice having no Mash-2 function. We report here that Mash-2-/- embryos die from placental failure at 10 days post-coitum. In mutant placentas, spongiotrophoblast cells and their precursors are absent and chorionic ectoderm is reduced. We have rescued this placental mutant phenotype by constructing chimaeras with tetraploid wild-type embryos which contribute almost exclusively to extraembryonic tissues9,10. Mash-2-/- embryos developed normally and adult Mash-2-/- mice were viable, demonstrating that Mash-2 has no major role in the embryo itself. Mash-2 is the first transcription factor shown to play a critical part in the development of the mammalian trophoblast lineage.
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Dynamic expression of the murine Achaete-Scute homologue Mash-1 in the developing nervous system☆
Mechanisms of development, 1993Co-Authors: Francois Guillemot, Alexandra L. JoynerAbstract:The Drosophila Achaete-Scute Complex genes encode transcriptional regulators belonging to the basic-helix-loop-helix family which control early steps of development of the central and peripheral nervous systems. We have isolated two mouse homologues of Achaete-Scute Complex genes, Mash-1 and Mash-2, by using the conservation of the basic-helix-loop-helix domain in this family. In this article, we analyse the expression of Mash-1 from its onset during neurulation to adult stages by RNA in situ hybridization on whole mounts and sections. As was observed for the rat Mash-1 protein, mouse Mash-1 RNA expression is restricted to cells of the developing central and peripheral nervous systems. We have observed three successive phases in the distribution of Mash-1 transcripts in the developing central nervous system. Initially, between embryonic day 8.5 and 10.5, Mash-1 transcripts are found in restricted domains in the neuroepithelium of the midbrain and ventral forebrain, as well as in the spinal cord. Between embryonic day 10.5 and 12.5, Mash-1 expression pattern changes from a restricted to a widespread one. Mash-1 transcripts are then found at variable levels in the ventricular zone in all regions of the brain. From embryonic day 12.5 to post-natal stages, Mash-1 is also expressed in cells outside of the ventricular zone throughout the brain. In addition, Mash-1 is expressed during development of the olfactory epithelium and neural retina. Overall, its expression pattern suggest that Mash-1 plays a role at early stages of development of specific neural lineages in most regions of the central nervous system and of several lineages in the peripheral nervous system. We have also compared the expression of Mash-1 and mouse Notch because their Drosophila homologues have been shown to interact genetically. The two genes show very similar expression patterns, both spatially and temporally, in the early developing brain and in the retina, suggesting that both genes may participate in the development of the same neural lineages.
Nicolas Kaufmann - One of the best experts on this subject based on the ideXlab platform.
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Trust issues in Web service Mash-ups
First Monday, 2011Co-Authors: Kevin Lee, Nicolas Kaufmann, Georg BussAbstract:With the emergence of Web service Mash-ups (Web applications that integrate different data sources), online data integration and aggregation is increasingly becoming the online norm for both commercial and non-commercial users. With such widespread adoption of data integration from discrete sources, the question emerges as to whether the resultant Mash-up can be considered as trustworthy. This paper explores the concepts behind Web service Mash-ups to determine the factors influencing their trustworthiness. The focus is on examining data quality and data assurance issues for both the data providers and the Mash-up consumers.
Watsawee Sansrimahachai - One of the best experts on this subject based on the ideXlab platform.
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provenance in web feed Mash up systems
International Journal of Information Technology and Web Engineering, 2016Co-Authors: Watsawee SansrimahachaiAbstract:The recent emergence of web 2.0 technologies and rich internet applications is driving the development of a new class of applications that combines data from diverse sources which we refer to as "Mash-ups." One of the most popular Mash-ups comes in the form of web feed Mash-ups relying on syndication technologies such as RSS and Atom. This kind of Mash-ups aggregates web feeds derived from multiple news websites or blogs and then timely presents them in a single interface. In such systems, it is difficult to know exactly how feed results in data Mash-ups are generated. In particular, it is difficult for users to make determinations about whether information is trusted. Therefore, it is necessary that web feed Mash-ups have to support a mechanism that is capable of recording and querying provenance information-the information about the process that led to result data. In this paper, the author proposes a provenance tracking solution that enables provenance functionality to be facilitated in web feed Mash-ups. He demonstrates how the provenance of feed Mash-up results to be determined by means of a provenance query algorithm. To tackle the storage problem resulting from the persistence of intermediate web feeds, a novel storage optimization method is introduced. Finally, the author evaluates his provenance solution in terms of storage consumption for provenance collection, demonstrating significant reductions in storage size and achieving reasonable storage overheads.
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towards dynamic provenance tracking in web feed Mash ups
Computer and Information Technology, 2014Co-Authors: Watsawee SansrimahachaiAbstract:A new breed of applications and services that combines data and content from diverse sources which we refer to as "Mash-ups" has grown significantly all across the Internet. One of the most popular Mash-ups comes in the form of web feed Mash-ups relying on syndication technologies such as RSS and Atom. This kind of Mash-ups aggregates web feeds derived from multiple news websites or blogs and then timely presents them in a single web-based interface. In such systems, it is difficult to know exactly how feed results in data Mash-ups are generated. In particular, it is difficult for users to make determinations about whether information is trusted, considering that source feeds have to pass through several processing operations before the feed results are presented. Therefore, it is crucial that web feed Mash-ups have to support a mechanism for recording and querying provenance information - the information about the process that led to result data. In this paper, we propose a provenance tracking solution that enables provenance functionality to be facilitated in web feed Mash-ups. We demonstrate how the provenance of feed Mash-up results to be determined by means of a provenance query algorithm. Finally, we evaluate our provenance tracking solution in terms of storage consumption for provenance collection, demonstrating predictable storage consumption and reasonable storage overheads.
