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Flexible and efficient IR using array databases

Roberto Cornacchia, Sándor Héman, Marcin Zukowski, Arjen P. de Vries, Peter Boncz
2007 The VLDB journal  
The Matrix Framework is a recent proposal by Information Retrieval (IR) researchers to flexibly represent information retrieval models and concepts in a single multidimensional array framework.  ...  To demonstrate their effect on text retrieval, we apply them in the TREC TeraByte track (TREC-TB) efficiency task, using the Okapi BM25 model as our example.  ...  applications running on top of it, (v) existence proof in case of the TREC TeraByte track (TREC-TB) efficiency task that an IR application on top of a DBMS can rival and even beat custom-built IR systems  ... 
doi:10.1007/s00778-007-0071-0 fatcat:7oaju5n6brdqfnxxxytlxxxcnm

Experiences with IR TOP N Optimization in a Main Memory DBMS: Applying 'the Database Approach' in New Domains [chapter]

Henk Ernst Blok, Arjen P. de Vries, Henk M. Blanken, Peter M. G. Apers
2001 Lecture Notes in Computer Science  
We present a case-study in the non-standard domain of (multimedia) information retrieval, mainly intended as a feasibility study in favor of the 'database approach' to data management.  ...  Top-N queries form a natural query class when dealing with content retrieval. In the IR field, a lot of research has been done on processing top-N queries efficiently.  ...  To do so, we fragment our database in 25 smaller fragments of Experiences with IR TOP N Optimization in a Main Memory DBMS 139 equal data size.  ... 
doi:10.1007/3-540-45754-2_9 fatcat:sbptfd3ncjfwlna7ai4gh47bty

The Multi-model DBMS Architecture and XML Information Retrieval [chapter]

Arjen P. de Vries, Johan A. List, Henk Ernst Blok
2003 Lecture Notes in Computer Science  
But, now that XML has become a standard document model that allows structure and text content to be represented in a combined way, new generations of information retrieval systems are expected to handle  ...  Consider for example an XML collection representing a newspaper archive, and the information need 'recent English newspaper articles about Willem-Alexander dating Maxima'. 3 This can be expressed as the  ...  A Database Approach to IR We seek a way out of this impasse between flexibility and efficiency by following 'the database approach' .  ... 
doi:10.1007/978-3-540-45194-5_12 fatcat:qtjesgap3zh3dbivuzrzbgn4ee

Predicting the cost-quality trade-off for information retrieval queries

Henk Ernst Blok, Djoerd Hiemstra, Sunil Choenni, Franciska de Jong, Henk M. Blanken, Peter M.G. Apers
2001 Proceedings of the tenth international conference on Information and knowledge management - CIKM'01  
Efficient, flexible, and scalable integration of full text information retrieval (IR) in a DBMS is not a trivial case. This holds in particular for query optimization in such a context.  ...  The usually imprecise nature of IR querying provides an extra opportunity to limit the data by a trade-off with the quality of the answer.  ...  Furthermore, we are not just interested in transparently integrating an IR system in a DBMS, but in a parallel mainmemory DBMS, to investigate the presumed advantages of such a system for IR, and multi-media  ... 
doi:10.1145/502620.502621 fatcat:veabnivsgncndkajgfathu6s7a

Predicting the cost-quality trade-off for information retrieval queries

Henk Ernst Blok, Djoerd Hiemstra, Sunil Choenni, Franciska de Jong, Henk M. Blanken, Peter M.G. Apers
2001 Proceedings of the tenth international conference on Information and knowledge management - CIKM'01  
Efficient, flexible, and scalable integration of full text information retrieval (IR) in a DBMS is not a trivial case. This holds in particular for query optimization in such a context.  ...  The usually imprecise nature of IR querying provides an extra opportunity to limit the data by a trade-off with the quality of the answer.  ...  Furthermore, we are not just interested in transparently integrating an IR system in a DBMS, but in a parallel mainmemory DBMS, to investigate the presumed advantages of such a system for IR, and multi-media  ... 
doi:10.1145/502585.502621 dblp:conf/cikm/BlokHCJBA01 fatcat:zkebjkofezhg7ahkctvf5h2bui

Object-Relational Database Representations for Text Indexing [article]

Panagiotis Papadakos, Yannis Theoharis, Yannis Marketakis, Nikos Armenatzoglou, Yannis Tzitzikas
2009 arXiv   pre-print
One of the distinctive features of Information Retrieval systems comparing to Database Management systems, is that they offer better compression for posting lists, resulting in better I/O performance and  ...  This is not achieved by redesigning the DBMS, but by exploiting the non 1NF features that existing Object-Relational DBM systems (ORDBMS) already offer.  ...  Some years later, the first IR system over a DBMS was presented [16] . Relevance ranking queries were implemented using unchanged SQL on an AT&T DBC-1012 parallel machine for TREC-3.  ... 
arXiv:0906.3112v1 fatcat:mjclnkfbmrazfdvzc36ujpzczu

Evaluation of Information Access Technologies at the NTCIR Workshop [chapter]

Noriko Kando
2004 Lecture Notes in Computer Science  
Introduction The NTCIR Workshops [1] 1 are a series of evaluation workshops designed to enhance research in information access (IA) technologies including information retrieval (IR), cross-lingual information  ...  interested in cross-system comparisons and exchanging research ideas in an informal atmosphere, and 3. to investigate methodologies and metrics for evaluation of information access technologies and methods  ...  A topic basically consists of a <TITLE>, a description <DESC>, and a detailed narrative <NARR> of the search request as similar to those used in CLEF and TREC.  ... 
doi:10.1007/978-3-540-30222-3_4 fatcat:kox5oyahanh2hlhybiwfct6rce

The Continued Saga of DB-IR Integration [chapter]

Ricardo Baeza-Yates, Mariano Consens
2004 Proceedings 2004 VLDB Conference  
"}) $2.score = $6.score $joinScore = ScoreSim($3.content, $8.content) $1.score = ScoreBar($joinScore, $6.score) -Integrated Full-text and Structure index: Hybrid & IR Approaches • Proximal Nodes, Region  ...  need -Users can navigate to information using two or more taxonomies at once The CO Approach Find papers by Vianu on the topic of "logical databases" • Each document in the corpus is treated as a unit  ... 
doi:10.1016/b978-012088469-8.50118-2 dblp:conf/vldb/Baeza-YatesC04 fatcat:2lzk6qlgurgbdoj6do2qtxy2za

The Continued Saga of DB-IR Integration [chapter]

R BAEZAYATES, M CONSENS
2004 Proceedings 2004 VLDB Conference  
"}) $2.score = $6.score $joinScore = ScoreSim($3.content, $8.content) $1.score = ScoreBar($joinScore, $6.score) -Integrated Full-text and Structure index: Hybrid & IR Approaches • Proximal Nodes, Region  ...  need -Users can navigate to information using two or more taxonomies at once The CO Approach Find papers by Vianu on the topic of "logical databases" • Each document in the corpus is treated as a unit  ... 
doi:10.1016/b978-012088469-8/50118-2 fatcat:dktiusnpj5hcfbu2fopto7psqq

Mining dependency relations for query expansion in passage retrieval

Renxu Sun, Chai-Huat Ong, Tat-Seng Chua
2006 Proceedings of the 29th annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '06  
from the TREC-12 QA task.  ...  Hence the use of such methods often brings in noise, which leads to reduced precision.  ...  Our results on the factoid questions 1 of TREC-12 QA task demonstrate that our approach is effective.  ... 
doi:10.1145/1148170.1148237 dblp:conf/sigir/SunOC06 fatcat:z6hre2m3rrgoxlzl7gidg4riyq

Interaction of query evaluation and buffer management for information retrieval

Björn T. Jónsson, Michael J. Franklin, Divesh Srivastava
1998 SIGMOD record  
Third, IR search is often an iterative process, in which a query is repeatedly refined and resubmitted by the user.  ...  First, due to the inherent fuzziness of the natural language used in IR queries and documents, an additional degree of flexibility is permitted in evaluating queries.  ...  Acknowledgments We would like to thank Michael Persin for his help with the DF algorithm, Douglas Oard for help with the TREC data and many helpful discussions, and Christos Faloutsos, Donald Kossmann,  ... 
doi:10.1145/276305.276316 fatcat:rlev4ztpszhanbecfzcvcn4kke

Interaction of query evaluation and buffer management for information retrieval

Björn T. Jónsson, Michael J. Franklin, Divesh Srivastava
1998 Proceedings of the 1998 ACM SIGMOD international conference on Management of data - SIGMOD '98  
Third, IR search is often an iterative process, in which a query is repeatedly refined and resubmitted by the user.  ...  First, due to the inherent fuzziness of the natural language used in IR queries and documents, an additional degree of flexibility is permitted in evaluating queries.  ...  Acknowledgments We would like to thank Michael Persin for his help with the DF algorithm, Douglas Oard for help with the TREC data and many helpful discussions, and Christos Faloutsos, Donald Kossmann,  ... 
doi:10.1145/276304.276316 dblp:conf/sigmod/JonssonFS98 fatcat:elgrg77cnvaz3bdsmzqs2g4lwy

A selectivity model for fragmented relations: applied in information retrieval

H.E. Blok, S. Choenni, H.M. Blanken, P.M.G. Apers
2004 IEEE Transactions on Knowledge and Data Engineering  
We show experimental verification for Zipfian distributed IR databases.  ...  Data fragmentation facilitates techniques (like distribution, parallelization, and main-memory computing) meeting these demands.  ...  We used the 50 retrieval queries, also known as topics in the IR field, from TREC-6. These queries range in length (l) from 9 up to and including 61 terms with an average of 27:441 terms.  ... 
doi:10.1109/tkde.2004.1277824 fatcat:aftybh664vbhxoazkrcbuah6sa

A case study on array query optimisation

Roberto Cornacchia, Alex van Ballegooij, Arjen P. de Vries
2004 Proceedings of the 1st international workshop on Computer vision meets databases - CVDB '04  
In order to make RAM a valid alternative to expensive and time-consuming hand-written solutions, this performance gap should be reduced.  ...  In particular, an additional effort is needed to solve the mismatch existing between the array-based data model typical for such computations and the set-based data model provided by the RDMBS.  ...  Using generative models for information retrieval (IR) follows the so-called 'language modelling approach' to IR (see e.g. [12] ). Applying this idea to image retrieval has been pioneered in [13] .  ... 
doi:10.1145/1039470.1039476 dblp:conf/cvdb/CornacchiaBV04 fatcat:ab2j2jxdgba2vfjuihz54jwkiq

Car-to-car radio channel measurements at 5 GHz: Pathloss, power-delay profile, and delay-Doppler spectrum

Alxender Paier, Johan Karedal, Nicolai Czink, Helmut Hofstetter, Charlotte Dumard, Thomas Zemen, Fredrik Tufvesson, Andreas F. Molisch, Christoph F. Mecklenbrauker
2007 2007 4th International Symposium on Wireless Communication Systems  
We carried out a car-to-infrastructure (C2I) and car-to-car (C2C) 4×4 multiple-input multiple-output (MIMO) radio channel measurement campaign at 5.2 GHz in Lund, Sweden.  ...  A pathloss coefficient of 1.8 yields the best fit with our measurement results in the mean square sense.  ...  ACKNOWLEDGEMENTS We would like to thank RIEGL Laser Measurement Systems GmbH and MEDAV GmbH for their generous support.  ... 
doi:10.1109/iswcs.2007.4392335 fatcat:5ifdrtjcf5dormmdjwj7sbrngq
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