Sven Helmer

ORCID

Publication Activity (10 Years)

Years Active: 1997-2024
Publications (10 Years): 58

Top Venues

University of Mannheim, Germany (PHD)

Education History

University of Mannheim, Germany

PHD

Publications

Jamal Mohammed, Michael H. Böhlen, Sven Helmer
Quantifying and Estimating the Predictability Upper Bound of Univariate Numeric Time Series. KDD (2024)
Sven Helmer, Peter T. Wood, Manuel Stuefer
Optimism and Pessimism in Database Query Optimisation. ICSC (2024)
AmirReza Alizade Nikoo, Michael H. Böhlen, Sven Helmer
Correlation Joins over Time Series Data Streams Utilizing Complementary Dimension Reduction and Transformation. Proc. ACM Manag. Data 1 (4) (2023)
Kevin Wellenzohn, Michael H. Böhlen, Sven Helmer, Antoine Pietri, Stefano Zacchiroli
Robust and scalable content-and-structure indexing. VLDB J. 32 (4) (2023)
Kevin Wellenzohn, Michael H. Böhlen, Sven Helmer, Marcel Reutegger
Workload-Aware Contention-Management in Indexes for Hierarchical Data. BTW (2023)
Qing Chen, Oded Lachish, Sven Helmer, Michael H. Böhlen
Dynamic Spanning Trees for Connectivity Queries on Fully-dynamic Undirected Graphs. Proc. VLDB Endow. 15 (11) (2022)
Kevin Wellenzohn, Michael H. Böhlen, Sven Helmer, Antoine Pietri, Stefano Zacchiroli
Robust and Scalable Content-and-Structure Indexing (Extended Version). CoRR (2022)
Qing Chen, Oded Lachish, Sven Helmer, Michael H. Böhlen
Dynamic Spanning Trees for Connectivity Queries on Fully-dynamic Undirected Graphs (Extended version). CoRR (2022)
Vuong M. Ngo, Sven Helmer, Nhien-An Le-Khac, M. Tahar Kechadi
Structural textile pattern recognition and processing based on hypergraphs. Inf. Retr. J. 24 (2) (2021)
Vasiliki Arpatzoglou, Artemis Kardara, Alexandra Diehl, Barbara Flueckiger, Sven Helmer, Renato Pajarola
DanceMoves: A Visual Analytics Tool for Dance Movement Analysis. EuroVis (Short Papers) (2021)
Kevin Wellenzohn, Luka Popovic, Michael H. Böhlen, Sven Helmer
Inserting Keys into the Robust Content-and-Structure (RCAS) Index. ADBIS (2021)
Vuong M. Ngo, Sven Helmer, Nhien-An Le-Khac, M. Tahar Kechadi
Structural Textile Pattern Recognition and Processing Based on Hypergraphs. CoRR (2021)
Danila Piatov, Sven Helmer, Anton Dignös, Fabio Persia
Cache-efficient sweeping-based interval joins for extended Allen relation predicates. VLDB J. 30 (3) (2021)
Matteo Nardini, Sven Helmer, Nabil El Ioini, Claus Pahl
A Blockchain-based Decentralized Electronic Marketplace for Computing Resources. SN Comput. Sci. 1 (5) (2020)
Kevin Wellenzohn, Michael H. Böhlen, Sven Helmer
Dynamic Interleaving of Content and Structure for Robust Indexing of Semi-Structured Hierarchical Data (Extended Version). CoRR (2020)
Fabio Persia, Giovanni Pilato, Mouzhi Ge, Paolo Bolzoni, Daniela D'Auria, Sven Helmer
Improving orienteering-based tourist trip planning with social sensing. Future Gener. Comput. Syst. 110 (2020)
Sven Helmer, David B. Blumenthal, Kathrin Paschen
What is meaningful research and how should we measure it? Scientometrics 125 (1) (2020)
Kevin Wellenzohn, Michael H. Böhlen, Sven Helmer
Dynamic Interleaving of Content and Structure for Robust Indexing of Semi-Structured Hierarchical Data. Proc. VLDB Endow. 13 (10) (2020)
Danila Piatov, Sven Helmer, Anton Dignös, Fabio Persia
Cache-Efficient Sweeping-Based Interval Joins for Extended Allen Relation Predicates (Extended Version). CoRR (2020)
Fabio Persia, Sven Helmer
High-Level Automatic Event Detection and User Classification in a Social Network Context. GraMSec@CSF (2019)
Danila Piatov, Sven Helmer, Anton Dignös, Johann Gamper
Interactive and space-efficient multi-dimensional time series subsequence matching. Inf. Syst. 82 (2019)
Claus Pahl, Nabil El Ioini, Sven Helmer, Brian Lee
A semantic pattern for trusted orchestration in IoT edge clouds. Internet Technol. Lett. 2 (3) (2019)
Fabio Persia, Sven Helmer, Sergejs Pugacs, Giovanni Pilato
Social Sensing for Improving the User Experience in Orienteering. ICSC (2019)
Daniela D'Auria, Fabio Persia, Fabio Bettini, Sven Helmer
Predicting and Preventing Dangerous Events via Video Surveillance Using a Robotic Platform. IRC (2019)
Daniela D'Auria, Fabio Persia, Fabio Bettini, Sven Helmer, Bruno Siciliano
SARRI: A SmArt Rapiro Robot Integrating a Framework for Automatic High-Level Surveillance Event Detection. IRC (2018)
Claus Pahl, Nabil El Ioini, Sven Helmer, Brian Lee
An architecture pattern for trusted orchestration in IoT edge clouds. FMEC (2018)
Sven Helmer
May I Have Your Attention, Please: - Building a Dystopian Attention Economy. WWW (Companion Volume) (2018)
Claus Pahl, Nabil El Ioini, Sven Helmer
A Decision Framework for Blockchain Platforms for IoT and Edge Computing. IoTBDS (2018)
Fabio Persia, Sven Helmer
A Framework for High-Level Event Detection in a Social Network Context Via an Extension of ISEQL. ICSC (2018)
Sven Helmer, Vuong M. Ngo
A Similarity Measure for Weaving Patterns in Textiles. CoRR (2018)
Sven Helmer, Matteo Roggia, Nabil El Ioini, Claus Pahl
EthernityDB - Integrating Database Functionality into a Blockchain. ADBIS (Short Papers and Workshops) (2018)
David von Leon, Lorenzo Miori, Julian Sanin, Nabil El Ioini, Sven Helmer, Claus Pahl
A Performance Exploration of Architectural Options for a Middleware for Decentralised Lightweight Edge Cloud Architectures. IoTBDS (2018)
Lorenzo Miori, Julian Sanin, Sven Helmer
A Platform for Edge Computing Based on Raspberry Pi Clusters. BICOD (2017)
Fabio Persia, Fabio Bettini, Sven Helmer
Labeling the Frames of a Video Stream with Interval Events. ICSC (2017)
Paolo Bolzoni, Fabio Persia, Sven Helmer
Itinerary Planning with Category Constraints Using a Probabilistic Approach. DEXA (2) (2017)
Sergejs Pugacs, Sven Helmer, Markus Zanker
A Framework for Comparing Interactive Route Planning Apps in Tourism. EnCHIReS@EICS (2017)
Fabio Persia, Fabio Bettini, Sven Helmer
An Interactive Framework for Video Surveillance Event Detection and Modeling. CIKM (2017)
Paolo Bolzoni, Sven Helmer
Hybrid Best-First Greedy Search for Orienteering with Category Constraints. SSTD (2017)
Danila Piatov, Sven Helmer, Johann Gamper
Interactive Time Series Subsequence Matching. ADBIS (2017)
Pekka Abrahamsson, Sven Helmer, Nattakarn Phaphoom, Lorenzo Nicolodi, Nick Preda, Lorenzo Miori, Matteo Angriman, Juha Rikkilä, Xiaofeng Wang, Karim Hamily, Sara Bugoloni
Affordable and Energy-Efficient Cloud Computing Clusters: The Bolzano Raspberry Pi Cloud Cluster Experiment. CoRR (2017)
Nattakarn Phaphoom, Xiaofeng Wang, Sarah Samuel, Sven Helmer, Pekka Abrahamsson
A survey study on major technical barriers affecting the decision to adopt cloud services. CoRR (2017)
Paolo Bolzoni, Sven Helmer
Solving Orienteering with Category Constraints Using Prioritized Search. CoRR (2017)
Danila Piatov, Sven Helmer
Sweeping-Based Temporal Aggregation. SSTD (2017)
Sven Helmer, Gerhard Glüher, Christian Upmeier
Show, Don't Tell: Retrieving Cultural Assets via Gestures. JOWO (2017)
Sven Helmer, Fabio Persia
High-Level Surveillance Event Detection Using an Interval-Based Query Language. ICSC (2016)
Claus Pahl, Sven Helmer, Lorenzo Miori, Julian Sanin, Brian Lee
A Container-Based Edge Cloud PaaS Architecture Based on Raspberry Pi Clusters. FiCloud Workshops (2016)
Sven Helmer, Fabio Persia
An Interval-based Query Language for High-level Surveillance Event Detection. SEBD (2016)
Fabio Persia, Sven Helmer
An Event Detection Framework Supported by a Smart Graphical User Interface. IRI (2016)
Pekka Abrahamsson, Sven Helmer, Tosin Daniel Oyetoyan, Stefan Brocanelli, Filippo Cardano, Daniele Gadler, Daniel Morandini, Alessandro Piccoli, Saifur Salam, Julian Sanin, Alam Mahabub Shahrear, Angelo Ventura
Bringing the Cloud to Rural and Remote Areas - Cloudlet by Cloudlet. CoRR (2016)
Danila Piatov, Sven Helmer, Anton Dignös
An interval join optimized for modern hardware. ICDE (2016)
Sven Helmer, Claus Pahl, Julian Sanin, Lorenzo Miori, Stefan Brocanelli, Filippo Cardano, Daniele Gadler, Daniel Morandini, Alessandro Piccoli, Saifur Salam, Alam Mahabub Sharear, Angelo Ventura, Pekka Abrahamsson, Tosin Daniel Oyetoyan
Bringing the Cloud to Rural and Remote Areas via Cloudlets. ACM DEV (2016)
Sven Helmer, Fabio Persia
ISEQL, an Interval-based Surveillance Event Query Language. Int. J. Multim. Data Eng. Manag. 7 (4) (2016)
Anja Kunkel, Astrid Rheinländer, Christopher Schiefer, Sven Helmer, Panagiotis Bouros, Ulf Leser
PIEJoin: Towards Parallel Set Containment Joins. SSDBM (2016)
Nattakarn Phaphoom, Xiaofeng Wang, Sarah Samuel, Sven Helmer, Pekka Abrahamsson
A survey study on major technical barriers affecting the decision to adopt cloud services. J. Syst. Softw. 103 (2015)
Sven Helmer, Vuong Minh Ngo
A Similarity Measure for Weaving Patterns in Textiles. SIGIR (2015)
Khaled Hamed Alyoubi, Sven Helmer, Peter T. Wood
Ordering Selection Operators Under Partial Ignorance. CIKM (2015)
Richard Brownlow, Stefano Capuzzi, Sven Helmer, Luciana Martins, Immanuel Normann, Alexandra Poulovassilis
An Ontological Approach to Creating an Andean Weaving Knowledge Base. ACM Journal on Computing and Cultural Heritage 8 (2) (2015)
Khaled Hamed Alyoubi, Sven Helmer, Peter T. Wood
Ordering Selection Operators Using the Minmax Regret Rule. CoRR (2015)
Mohammad Tareq Jaber, Panagiotis Papapetrou, Sven Helmer, Peter T. Wood
Using Time-Sensitive Rooted PageRank to Detect Hierarchical Social Relationships. IDA (2014)
Paolo Bolzoni, Sven Helmer, Kevin Wellenzohn, Johann Gamper, Periklis Andritsos
Efficient itinerary planning with category constraints. SIGSPATIAL/GIS (2014)
Mohammad Tareq Jaber, Peter T. Wood, Panagiotis Papapetrou, Sven Helmer
Inferring offline hierarchical ties from online social networks. WWW (Companion Volume) (2014)
Pekka Abrahamsson, Sven Helmer, Nattakarn Phaphoom, Lorenzo Nicolodi, Nick Preda, Lorenzo Miori, Matteo Angriman, Juha Rikkilä, Xiaofeng Wang, Karim Hamily, Sara Bugoloni
Affordable and Energy-Efficient Cloud Computing Clusters: The Bolzano Raspberry Pi Cloud Cluster Experiment. CloudCom (2) (2013)
Georgia Garani, Sven Helmer
Integrating Star and Snowflake Schemas in Data Warehouses. Int. J. Data Warehous. Min. 8 (4) (2012)
Sven Helmer, Nikolaus Augsten, Michael H. Böhlen
Measuring structural similarity of semistructured data based on information-theoretic approaches. VLDB J. 21 (5) (2012)
Carlos D. Barranco, Sven Helmer
An impact ordering approach for indexing fuzzy sets. Fuzzy Sets Syst. 196 (2012)
Andrew McDonald, Sven Helmer
A Comparative Case Study of Indonesian and UK Organisational Culture Differences in IS Project Management. Int. J. Technol. Hum. Interact. 7 (2) (2011)
Tadeusz Litak, Sven Helmer
On the Termination Problem for Declarative XML Message Processing. DEXA (2009)
Denise Y. Arnold, Sven Helmer, Rodolfo Velásquez Arando
Towards Building a Knowledge Base for Research on Andean Weaving. BNCOD (2009)
Carlos D. Barranco, Sven Helmer
Increasing the Performance of Fuzzy Retrieval Using Impact Ordering. IFSA/EUSFLAT Conf. (2009)
Alexandre Guitton, Niki Trigoni, Sven Helmer
Fault-Tolerant Compression Algorithms for Delay-Sensitive Sensor Networks with Unreliable Links. DCOSS (2008)
Sven Helmer, Robin Aly, Thomas Neumann, Guido Moerkotte
Indexing Set-Valued Attributes with a Multi-level Extendible Hashing Scheme. DEXA (2007)
Sven Helmer
Measuring the Structural Similarity of Semistructured Documents Using Entropy. VLDB (2007)
Sven Helmer
An Interval-Based Index Structure for Structure Elucidation in Chemical Databases. IFSA (1) (2007)
Norman May, Sven Helmer, Guido Moerkotte
Strategies for query unnesting in XML databases. ACM Trans. Database Syst. 31 (3) (2006)
Thomas Neumann, Sven Helmer, Guido Moerkotte
On the Optimal Ordering of Maps, Selections, and Joins Under Factorization. BNCOD (2006)
Matthias Brantner, Sven Helmer, Carl-Christian Kanne, Guido Moerkotte
Kappa-Join: Efficient Execution of Existential Quantification in XML Query Languages. XSym (2006)
Matthias Brantner, Carl-Christian Kanne, Guido Moerkotte, Sven Helmer
Algebraic Optimization of Nested XPath Expressions. ICDE (2006)
Matthias Brantner, Sven Helmer, Carl-Christian Kanne, Guido Moerkotte
Full-fledged Algebraic XPath Processing in Natix. ICDE (2005)
Vasco Amaral, Sven Helmer, Guido Moerkotte
Formally Specifying the Syntax and Semantics of a Visual Query Language for the Domain of High Energy Physics Data Analysis. VL/HCC (2005)
Thomas Neumann, Sven Helmer, Guido Moerkotte
On the Optimal Ordering of Maps and Selections under Factorization. ICDE (2005)
Aleksei Pavlov, Sven Helmer, Guido Moerkotte
A Model-Based Monitoring and Diagnosis System for a Space-Based Astrometry Mission. DEXA (2005)
Vasco Amaral, Sven Helmer, Guido Moerkotte
PHEASANT: A PHysicist's EAsy ANalysis Tool. FQAS (2004)
Sven Helmer, Carl-Christian Kanne, Guido Moerkotte
Evaluating lock-based protocols for cooperation on XML documents. SIGMOD Rec. 33 (1) (2004)
Sven Helmer, Carl-Christian Kanne, Guido Moerkotte
Timestamp-Based Protocols for Synchronizing Access on XML Documents. DEXA (2004)
Norman May, Sven Helmer, Carl-Christian Kanne, Guido Moerkotte
XQuery Processing in Natix with an Emphasis on Join Ordering. XIME-P (2004)
Norman May, Sven Helmer, Guido Moerkotte
Nested Queries and Quantifiers in an Ordered Context. ICDE (2004)
Norman May, Sven Helmer, Guido Moerkotte
Three Cases for Query Decorrelation in XQuery. Xsym (2003)
Sven Helmer, Guido Moerkotte
A performance study of four index structures for set-valued attributes of low cardinality. VLDB J. 12 (3) (2003)
Sven Helmer
Book Review: "Recent issues on fuzzy databases" by G. Bordogna and G. Pasi (Eds.); Physica Verlag, Wurzburg, 2000, 236pp., ISBN: 3-7908-1319-2. Fuzzy Sets Syst. 140 (1) (2003)
Sven Helmer, Thomas Neumann, Guido Moerkotte
Estimating the Output Cardinality of Partial Preaggregation with a Measure of Clusteredness. VLDB (2003)
Sven Helmer, Thomas Neumann, Guido Moerkotte
A Robust Scheme for Multilevel Extendible Hashing. ISCIS (2003)
Sven Helmer
Evaluating different approaches for indexing fuzzy sets. Fuzzy Sets Syst. 140 (1) (2003)
Norman May, Sven Helmer, Guido Moerkotte
Quantifiers in XQuery. WISE (2003)
Sven Helmer, Carl-Christian Kanne, Guido Moerkotte
Lock-based Protocols for Cooperation on XML Documents. DEXA Workshops (2003)
Sven Helmer, Carl-Christian Kanne, Guido Moerkotte
XML-Datenbanksysteme und ihre Anwendung. it Inf. Technol. 45 (3) (2003)
Thorsten Fiebig, Sven Helmer, Carl-Christian Kanne, Guido Moerkotte, Julia Neumann, Robert Schiele, Till Westmann
Natix: A Technology Overview. Web, Web-Services, and Database Systems (2002)
Thorsten Fiebig, Sven Helmer, Carl-Christian Kanne, Guido Moerkotte, Julia Neumann, Robert Schiele, Till Westmann
Anatomy of a native XML base management system. VLDB J. 11 (4) (2002)
Sven Helmer, Carl-Christian Kanne, Guido Moerkotte
Optimized Translation of XPath into Algebraic Expressions Parameterized by Programs Containing Navigational Primitives. WISE (2002)
Till Westmann, Donald Kossmann, Sven Helmer, Guido Moerkotte
The Implementation and Performance of Compressed Databases. SIGMOD Rec. 29 (3) (2000)
Birgit Boss, Sven Helmer
Index structures for efficiently accessing fuzzy data including cost models and measurements. Fuzzy Sets Syst. 108 (1) (1999)

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Publication Activity (10 Years)

Top Topics

Top Venues

Sven Helmer