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Query Evaluation with Constant Delay

by Thèse De Doctorat, Normale Supérieure, De Cachan, Présentée Par, Monsieur Wojciech Kazana, Docteur De, Supérieure De Cachan, Nicole Bidoit, Professeur Président, Arnaud Durand, Patrice Ossona, Mendez Chargé, Victor Vianu, Professeur Examinateur, Luc Segoufin, Directeur Recherche Directeur
"... I am grateful to Luc Segoufin who kindly accepted me to be his PhD student. He introduced me to the problem of query enumeration and encouraged me to look for the answers to all the questions that emerged during our collaboration. He was a truly great advisor, always supportive and available for dis ..."
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I am grateful to Luc Segoufin who kindly accepted me to be his PhD student. He introduced me to the problem of query enumeration and encouraged me to look for the answers to all the questions that emerged during our collaboration. He was a truly great advisor, always supportive and available

Object/relational query optimization with chase

by Lucian Popa
"... and backchase ..."
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and backchase

First steps in programming: A rationale for attention investment models.

by Alan F Blackwell - In Proc. HCC, IEEE , 2002
"... Abstract Research into the cognitive aspects of programming originated in the study of professional programmers (whether experts or students). Even "end-user" programmers What is Programming? Goodell's excellent website devoted to end user programming Programming is in fact seld ..."
Abstract - Cited by 110 (16 self) - Add to MetaCart
;spadework" of finding a precise mathematical formulation and method of solution, possibly notated in a "convenient problem-oriented language" whose symbols are "more closely related to the mathematical problem to be solved". The major changes since this was written are a) that many computer users do

Good Questions, Dubious Inferences, and Bad Solutions: Some Further Thoughts on Satisfaction with Democracy. Working Paper

by Christopher J. Anderson, Christopher J. Anderson , 2005
"... I evaluate claims made in a recent paper, which challenges the validity of the widely-used Satisfaction with Democracy (SWD) indicator (Canache, Mondak, and Seligson 2001). I argue that the study falls short because the evidence presented in the paper does not actually nor necessarily lead to the in ..."
Abstract - Cited by 7 (1 self) - Add to MetaCart
. I argue that the paper does not make a very strong case against the measure, tells us little we do not already know, and does not seek to advance our theoretical understanding of political support. Maybe most importantly, it does not offer a solution to the problems it purports to identify. I also

On zero error algorithms having oracle access to one query

by Venkatesan T. Chakaravarthy - Journal of Combinatorial Optimization
"... Abstract It is known that Sp2 ` ZPPNP [3]. The reverse direction of whether ZPPNP is contained inS p 2 remains open. We show that if the zero-error algorithm is allowed to ask only one queryto the NP oracle (for any input and random string), then it can be simulated in Sp 2. That is,we prove that ZP ..."
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Abstract It is known that Sp2 ` ZPPNP [3]. The reverse direction of whether ZPPNP is contained inS p 2 remains open. We show that if the zero-error algorithm is allowed to ask only one queryto the NP oracle (for any input and random string), then it can be simulated in Sp 2. That is,we prove

A bad 2-dimensional instance for k-means++

by Ragesh Jaiswal, Prachi Jain, Saumya Yadav
"... Abstract. The k-means++ seeding algorithm is one of the most popular algorithms that is used for finding the initial k centers when using the k-means heuristic. The algorithm is a simple sampling procedure and can be described as follows: Pick the first center randomly from among the given points. F ..."
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11] gave a dataset where the k-means++ seeding algorithm achieves an approximation ratio of (2/3 − ) · log k only with probability that is exponentially small in k. However, this and all other known lower-bound examples [AV07,ADK09] are high dimensional. So, an open problem is to understand

Quantitative Analysis of Consensus Algorithms

by Fatemeh Borran, Martin Hutle, Nuno Santos, André Schiper
"... Abstract—Consensus is one of the key problems in fault-tolerant distributed computing. Although the solvability of consensus is now a well-understood problem, comparing different algorithms in terms of efficiency is still an open problem. In this paper, we address this question for round-based conse ..."
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Abstract—Consensus is one of the key problems in fault-tolerant distributed computing. Although the solvability of consensus is now a well-understood problem, comparing different algorithms in terms of efficiency is still an open problem. In this paper, we address this question for round

The BKZ Simulation Algorithm

by Fachbereich Informatik, Fachgebiet Theoretische Informatik, Tobias Hamann
"... Hiermit versichere ich, die vorliegende Bachelor-Thesis ohne Hilfe Dritter nur mit den angegebenen Quellen und Hilfsmitteln angefertigt zu haben. Alle Stellen, die aus Quellen entnommen wurden, sind als solche kenntlich gemacht. Diese Arbeit hat in gleicher oder ähnlicher Form noch keiner Prüfungsbe ..."
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Prüfungsbehörde vorgelegen. Darmstadt, den 08. 07. 2013 (Tobias Hamann) The best reduction algorithm for lattices with high dimensions known today is the BKZ reduction algorithm by Schnorr and Euchner. The running time of the BKZ reduction algorithm, however, increases significantly with higher blocksizes

Using views to generate efficient evaluation plans for queries

by Foto N. Afrati , Chen Li, Jeffrey D. Ullman , 2007
"... We study the problem of generating efficient, equivalent rewritings using views to compute the answer to a query. We take the closed-world assumption, in which views are materialized from base relations, rather than views describing sources in terms of abstract predicates, as is common when the open ..."
Abstract - Cited by 4 (3 self) - Add to MetaCart
We study the problem of generating efficient, equivalent rewritings using views to compute the answer to a query. We take the closed-world assumption, in which views are materialized from base relations, rather than views describing sources in terms of abstract predicates, as is common when

Credit Card Fraud Detection with a Neural-Network,”

by Sushmito Ghosh , Douglas L Reilly - Proc. 27th Hawaii Int‟l Conf. System Sciences: Information Systems: Decision Support and Knowledge-Based Systems, , 1994
"... Abstract Using data from a credit card issuer, a neural network based fraud detection system was trained on a large sample of labelled credit card account transactions and tested on a holdout data set that consisted of all account activity over a subsequent two-month period of time. The neural netw ..."
Abstract - Cited by 74 (0 self) - Add to MetaCart
of the fraud problem grew from 8 basis points to over 20. Although credit card fraud takes many forms, there are several principal categories. Fraud due to lost cards and stolen cards generally accounts for a certain "base level" of fraud activity. The size of this base level can be affected
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