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- item-1 hasContent anupriya-ankolekar.
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- 784 creator ewa-dominowska.
- 784 creator matthew-richardson.
- 784 creator robert-ragno.
- 784 type InProceedings.
- 784 label "Predicting Clicks: Estimating the Click-Through Rate for New Ads".
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- 784 abstract "Search engine advertising has become a significant aspect of the Web browsing experience. The order in which a search engine displays ads greatly affects the probability that a user will see and click on each ad. Consequently, the ranking has a strong impact on the revenue the search engine receives from the ads. Further, showing the user an ad that they prefer to click on also improves user satisfaction. For these reasons, it is crucially important to be able to estimate the click-through rate of ads in the system. For ads that have been repeatedly displayed, this is empirically meas-urable, but when ads initially appear, other means must be used. We show that we can use features of ads, keywords, and advertis-ers to learn a model that accurately predicts the click-though rate for an ad. We also show that using our model improves the con-vergence and performance of an advertising system. As a result, our model would improve both revenues and user satisfaction.".
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- 784 title "Predicting Clicks: Estimating the Click-Through Rate for New Ads".
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- item-1 hasContent matthew-richardson.
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- item-2 hasContent ewa-dominowska.
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- 785 creator amit-sheth.
- 785 creator angela-maduko.
- 785 creator kemafor-anyanwu.
- 785 type InProceedings.
- 785 label "SPARQ2L: Towards Support For Subgraph Extraction Queries in RDF Databases".
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- 785 abstract "Many applications in analytical domains often have the need to 'connect the dots' i.e., query about the structure of data. In bioinformatics for example, it is typical to want to query about interactions between proteins. The aim of such queries is to 'extract' relationships between entities i.e. paths from a data graph. Often, such queries will specify certain constraints that qualifying results must satisfy e.g. paths involving a set of mandatory nodes. Unfortunately, most present day Semantic Web query languages including the current draft of the anticipated recommendation SPARQL, lack the ability to express queries about arbitrary path structures in data. In addition, many systems that support some limited form of path queries rely on main memory graph algorithms limiting their applicability to very large scale graphs. In this paper, we present an approach for supporting Path Extraction queries. Our proposal comprises (i) a query language SPARQ2L which extends SPARQL with path variables and path variable constraint expressions, and (ii) a novel query evaluation framework based on efficient algebraic techniques for solving path problems which allows for path queries to be efficiently evaluated on disk resident RDF graphs. The effectiveness of our proposal is demonstrated by a performance evaluation of our approach on both real world based and synthetic datasets.".
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- 785 title "SPARQ2L: Towards Support For Subgraph Extraction Queries in RDF Databases".
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- item-1 hasContent kemafor-anyanwu.
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- item-2 hasContent angela-maduko.
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- item-3 hasContent amit-sheth.
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- 788 creator madhusudan-parthasarathy.
- 788 creator mahesh-viswanathan.
- 788 creator viraj-kumar.
- 788 type InProceedings.
- 788 label "Visibly Pushdown Automata for Streaming XML".
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- 788 abstract "We propose the study of visibly pushdown automata (VPA) for processing XML documents. VPAs are pushdown automata where the input determines the stack operation, and XML documents are naturally visibly pushdown with the VPA pushing onto the stack on open-tags and popping the stack on close-tags. In this paper we demonstrate the power and ease visibly pushdown automata give in the design of streaming algorithms for XML documents.<br /><br /> We study the problems of type-checking streaming XML documents against SDTD schemas, and the problem of typing tags in a streaming XML document according to an SDTD schema. For the latter problem, we consider both pre-order typing and post-order typing of a document, which dynamically determines types at open-tags and close-tags respectively as soon as they are met. We also generalize the problems of pre-order and post-order typing to prefix querying. We show that a deterministic VPA yields an algorithm to the problem of answering in one pass the set of all answers to any query that has the property that a node satisfying the query is determined solely by the prefix leading to the node. All the streaming algorithms we develop in this paper are based on the construction of deterministic VPAs, and hence, for any fixed problem, the algorithms process each element of the input in constant time, and use space O(d), where d is the depth of the document.".
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- 788 title "Visibly Pushdown Automata for Streaming XML".
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- item-1 hasContent viraj-kumar.
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- item-2 hasContent madhusudan-parthasarathy.
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- item-3 hasContent mahesh-viswanathan.
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- 790 creator bernhard-kruepl.
- 790 creator bernhard-pollak.
- 790 creator marcus-herzog.
- 790 creator paul-bohunsky.
- 790 creator wolfgang-gatterbauer.
- 790 type InProceedings.
- 790 label "Domain Independent Information Extraction from Web Tables".
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