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A new parallel signature file method for efficient information retrieval

Jeong-Ki Kim, Jae-Woo Chang
1995 Proceedings of the fourth international conference on Information and knowledge management - CIKM '95  
The signature file method has been widely advocated as an efficient index scheme to handle new abdications demand-  ...  "A Two-dimentional Dy- namic Signature File Method". "Signature Files: An Access Method for Documents and Its Analyti- cal Performance Evaluation". ACM Trans. on 01S, 2(4):267-288, 1984.  ...  Keywords: dynamic signature files, parallel databases, extendible hashing, frame-slicing technique, performance evaluation 1 Introduction The signature file method has widely been advocated as an efficient  ... 
doi:10.1145/221270.221329 dblp:conf/cikm/KimC95 fatcat:zdr7lpwq7nf5zmodzkpsxgkuji

Document ranking on weight-partitioned signature files

Dik Kun Lee, Liming Ren
1996 ACM Transactions on Information Systems  
Professor Harvev Friedm an Approved by .A.dviser D epartm ent of C om puter and Inform ation Science o UMI Number: 9834053 UMI Microform 9834053  ...  Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins, and improper alignment can adversely affect reproduction.  ...  Furtherm ore, it also avoids exhaustive search on the signature file. An analytical study is perform ed on various performance issues of the w eight-partitioned signature file.  ... 
doi:10.1145/226163.226164 fatcat:wgf32u6mqvfcpbhp6hw3ezj3ca

Bit-sliced signature files for very large text databases on a parallel machine architecture [chapter]

George Panagopoulos, Christos Faloutsos
1994 Lecture Notes in Computer Science  
This method achieves graceful performance degradation according to the database size. We provide formulae for the optimal number of signature slices to fetch and match with the query signature.  ...  We propose the use of a Parallel Bit-Sliced Signature File method on a SIMD machine architecture when the size of the signature le exceeds the available memory.  ...  Section 4 contains the results of an analytic performance evaluation of the proposed retrieval algorithm.  ... 
doi:10.1007/3-540-57818-8_65 fatcat:l2ljjnllzjdpfol3gfbqkl5z5e

Optimization of signature file parameters for databases with varying record lengths

S Kocberber
1999 Computer journal  
For signature files we propose a new false drop estimation method for databases with varying record lengths.  ...  Depending on the space overhead, our approach obtains up to 33% and 20% response time improvements for the conventional sequential and new efficient multiframe signature file methods, respectively.  ...  Their suggestions have greatly improved both the contents and presentation of the paper.  ... 
doi:10.1093/comjnl/42.1.11 fatcat:nkjf4v7tpzc3tba6edm2jairgi

Vertical framing of superimposed signature files using partial evaluation of queries

Seyit Kocberbera, Fazli Can
1997 Information Processing & Management  
A new signature file method, Multi-Frame Signature File (MFSF), is introduced by extending the bit-sliced signature file method.  ...  As the number of query terms increases, the number of query signature on-bits in the lower on-bit density frames increases and the query stopping condition is reached in fewer evaluation steps.  ...  Acknowledgemenrs-We are grateful to a referee for insightful comments that improved the presentation  ... 
doi:10.1016/s0306-4573(96)00073-8 fatcat:qrotrvbvanegbls4fmk3qis6zq

A dynamic signature technique for multimedia databases

F. Rabitti, P. Zezula
1990 Proceedings of the 13th annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '90  
Even though several techniques for organizing and searching signature files have been proposed in literature, they  ...  A signature file acts us a filtering mechanism to reduce the amount of data that needs to be searched during query evaluation.  ...  Implementation of this technique is illustrated using an example and is veriJed by analytical performance evaluation.  ... 
doi:10.1145/96749.98223 dblp:conf/sigir/RabittiZ90 fatcat:pse3akvaljajjlywnhxrzlv4su

Comparative Transcriptomic Signature of the Simulated Microgravity Response in Caenorhabditis elegans: Additional File 1 [article]

Irem Celen, Aroshan Jayasinghe, Jung Doh, Chandran R Sabanayagam
2019 bioRxiv   pre-print
Using an integrative approach, we identify a conserved transcriptomic signature to microgravity and its sustained impact after return to the ground.  ...  Conclusions: Our results address the sole impact of simulated microgravity on transcriptome by controlling for the other space-introduced conditions and utilizing RNA-seq.  ...  of an organism 84 [3, 6-10]. 85 C. elegans is an ideal model organism for space biology studies with its completely 86 documented cell lineage, high reproduction rate, short lifespan, and high similarity  ... 
doi:10.1101/531335 fatcat:glhcg3ivfbcipk3scxgzopbbsa

Efficient Use of Signatures in Object-Oriented Database Systems [chapter]

Kjetil Nørväg
1999 Lecture Notes in Computer Science  
In this report we show how the signatures can be stored in the OIDX, and used to reduce the average object access cost in a system.  ...  We develop a cost model that we use to analyze the performance of the proposed approaches, and this analysis shows that substantial gain can be achieved.  ...  Kjell Bratbergsengen, who first introduced him to signatures.  ... 
doi:10.1007/3-540-48252-0_27 fatcat:2zdwchjovvc23mgouelekov4q4

A method for high-throughput gene expression signature analysis

David Peck, Emily D Crawford, Kenneth N Ross, Kimberly Stegmaier, Todd R Golub, Justin Lamb
2006 Genome Biology  
However, the lack of a practical and cost-effective technology for detection of these gene expression 'signatures' in large numbers of samples has severely limited their exploitation in important medical  ...  Here, we describe a solution based on the combination of ligation-mediated amplification with an optically addressed microsphere and flow cytometric detection system.  ...  Acknowledgements We thank Jim Jacobson, Ben Ebert, and Luminex Corporation. This work was supported in part by the Steven and Bonnie Stern Research Fund and the Leukemia and Lymphoma Society.  ... 
doi:10.1186/gb-2006-7-7-r61 pmid:16859521 pmcid:PMC1779561 fatcat:pe3riqtkdvg65fyqa4urf6dssu

Fine-granularity signature caching in object database systems

Kjetil Nørvåg
2001 Data & Knowledge Engineering  
A typical example of such an application area is XML/Web storage. In order to reduce the object access cost, signature files can be used.  ...  In many of the emerging application areas for database systems, data is viewed as a collection of objects, the access pattern is navigational, and a large fraction of the accesses are perfect match accesses  ...  However, in an ODB it is also possible to access data from a general programming language, for example C++ or Java, and through method calls in queries (although not all vendors provide this functionality  ... 
doi:10.1016/s0169-023x(01)00012-x fatcat:ha5mfmucunctrjf4ilvz2vb6hm

Energy Signature Analysis: Knowledge at Your Fingertips

Andrea Acquaviva, Daniele Apiletti, Antonio Attanasio, Elena Baralis, Lorenzo Bottaccioli, Federico Boni Castagnetti, Tania Cerquitelli, Silvia Chiusano, Enrico Macii, Dario Martellacci, Edoardo Patti
2015 2015 IEEE International Congress on Big Data  
Among the large variety of methods proposed by energy scientists and professionals to evaluate building energy consumption, a widely adopted approach is the energy signature.  ...  ESA exploits a Big Data approach to perform a scalable and distributed computation of the building energy signature, which is exploited to forecast the expected power consumption for given contextual conditions  ...  In this work we focus on evaluating and analyzing the building performance through the evaluation of energy signature.  ... 
doi:10.1109/bigdatacongress.2015.85 dblp:conf/bigdata/AcquavivaAABBCC15 fatcat:2sy5nxnabbc3dimn7hdshf3n5m

Toward a Deeper Understanding of Data Analysis, Sensemaking, and Signature Discovery [chapter]

Sheriff Jolaoso, Russ Burtner, Alex Endert
2015 Lecture Notes in Computer Science  
Two popular models used for this generalization are the sensemaking and signature discovery models, which apply a cognitive and computational focus to describe the analytic process, respectively.  ...  Data analysts are tasked with the challenge of transforming an abundance of data into knowledge and insights.  ...  This research is part of the Signature Discovery Initiative at Pacific Northwest National Laboratory, conducted under the Laboratory Directed Research and Development Program at PNNL, a multi-program national  ... 
doi:10.1007/978-3-319-22668-2_36 fatcat:2w4hfq566fa4zcxaiaojva2eia

Viola: a structural variant signature extractor with user-defined classifications [article]

Itsuki Sugita, Shohei Matsuyama, Hiroki Dobashi, Daisuke Komura, Shumpei Ishikawa
2021 bioRxiv   pre-print
., cancer) signature analytical functions and utilities for custom SV classification, merging multi-SV-caller output files, and SV annotation.  ...  We demonstrate that Viola can extract biologically meaningful SV signatures from publicly available SV data for cancer and we evaluate the computational time necessary for annotation of the data.  ...  Acknowledgements 153 We thank Enago (www.enago.jp) for the English language review. 154 Financial Support: This work was supported by AMED P-CREATE (JP20cm0106551) and KAKENHI 155 Grant-in-Aid for  ... 
doi:10.1101/2021.03.31.437648 fatcat:7ni7wltofbgrzajhddn6dzc6re

Image query processing based on multi-level signatures

F. Rabitti, P. Savino
1991 Proceedings of the 14th annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '91  
The query is pre-processed on the signatures to jilter-out most of the images not sati~ing the query. Finally, an evaluation of the ejjiciency and precision of the signature technique is given.  ...  Particukzr emphasis is given on the definition of suitable content-based access structures to make more ejjicient the query processing. An approach based on multi-level signatures is adopted.  ...  Step for each Ti such that Evaluation It is very difficult to perform an analytical evaluation of the signature-based access method to image databases proposed in this paper.  ... 
doi:10.1145/122860.122891 dblp:conf/sigir/Rabitti91 fatcat:qpjo72sf75aavdjniqoku4yfw4

Viola: a structural variant signature extractor with user-defined classifications

Itsuki Sugita, Shohei Matsuyama, Hiroki Dobashi, Daisuke Komura, Shumpei Ishikawa, Peter Robinson
2021 Bioinformatics  
., cancer) signature analytical functions and utilities for custom SV classification, merging multi-SV-caller output files, and SV annotation.  ...  We demonstrate that Viola can extract biologically meaningful SV signatures from publicly available SV data for cancer and we evaluate the computational time necessary for annotation of the data.  ...  Acknowledgements We thank Enago (www.enago.jp) for the English language review. Funding This work was supported by AMED P-CREATE (JP20cm0106551) Conflict of Interest: none declared.  ... 
doi:10.1093/bioinformatics/btab662 pmid:34534268 pmcid:PMC8723148 fatcat:fx2m6gjskfakrkdf4yxonozgua
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