Timo Niemi

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A visual XML dataspace approach for satisfying ad hoc information needs

Katja Moilanen, Timo Niemi, Turkka Näppilä, 2015, J. Assoc. Inf. Sci. Technol..

An NF2 relational interface for document retrieval, restructuring and aggregation

Timo Niemi, Kalervo Järvelin, 1995, SIGIR '95.

Conversion of XML‐based Open Data into Relational Closed Data

Timo Niemi, Turkka Näppilä, T. Näppilä, 2014 .

Specification of data restructuring software based on the attribute method

Timo Niemi, T. Niemi, 1984, International Journal of Computer & Information Sciences.

Advanced tools for data conversion and database cost modelling

Timo Niemi, Kalervo Järvelin, K. Järvelin, 1987, Inf. Manag..

Deductive information retrieval based on classifications

Timo Niemi, Kalervo Järvelin, 1993 .

An Entity-Based Approach to Query Processing in Relational Databases. Part I: Entity Type Representation

Timo Niemi, Kalervo Järvelin, K. Järvelin, 1993, Data Knowl. Eng..

The processing strategy for the NF2 relational frc-interface

Timo Niemi, Kalervo Järvelin, 1996, Inf. Softw. Technol..

An Approach for Designing and Implementing a Visual XML Dataspace System

Katja Moilanen, Timo Niemi, Mikko Kuru, 2012 .

A Straightforward NF² Relational Interface with Applications in Information Retrieval

Timo Niemi, Kalervo Järvelin, 1995, Inf. Process. Manag..

A new measure of clustering effectiveness: Algorithms and experimental studies

Timo Niemi, Turkka Näppilä, Kalervo Järvelin, 2008 .

A straightforward NF 2 relational interface with applications in information retrieval

Timo Niemi, Kalervo Järvelin, 1995 .

Query language approach based on the deductive object-oriented database paradigm

Timo Niemi, Kalervo Järvelin, M. Christensen, 2000, Inf. Softw. Technol..

A query language for discovering semantic associations, Part II: sample queries and query evaluation

Timo Niemi, Janne Jämsen, 2007, J. Assoc. Inf. Sci. Technol..

Derived types in semantic association discovery

Timo Niemi, Kalervo Järvelin, Janne Jämsen, 2010, Journal of Intelligent Information Systems.

A user-oriented interface for generalised informetric analysis based on applying advanced data modelling techniques

Timo Niemi, Peter Ingwersen, Kalervo Järvelin, 2000, J. Documentation.

Specification of a query language by the attribute method

Timo Niemi, T. Niemi, 1984, BIT.

A tool for data cube construction from structurally heterogeneous XML documents

Timo Niemi, Turkka Näppilä, Kalervo Järvelin, 2008, J. Assoc. Inf. Sci. Technol..

A relational data harmonization approach to XML

Timo Niemi, Turkka Näppilä, Kalervo Järvelin, 2009, J. Inf. Sci..

Integration of complex objects and transitive relationships for information retrieval

Timo Niemi, Kalervo Järvelin, K. Järvelin, 1999, Inf. Process. Manag..

A query language for selecting, harmonizing, and aggregating heterogeneous XML data

Katja Moilanen, Timo Niemi, Turkka Näppilä, 2011, Int. J. Web Inf. Syst..

The visual query language CQL for transitive and relational computation

Timo Niemi, Kalervo Järvelin, Airi Salminen, 2000, Data Knowl. Eng..

A query language for discovering semantic associations, Part I: Approach and formal definition of query primitives

Timo Niemi, Janne Jämsen, 2007 .

Relational Deductive Object-Oriented Modeling (RDOOM) Approach for Finding, Representing and Integrating Application-Specific Concepts

Marko Junkkari, Timo Niemi, Kalervo Järvelin, 2002, Int. J. Softw. Eng. Knowl. Eng..

Advanced Retrieval From Heterogeneous Fact Databases: Integration of Data Retrieval, Conversion, Aggregation and Deductive Techniques.

Timo Niemi, Kalervo Järvelin, 1991, SIGIR 1991.

Operation-oriented query language approach for recursive queries - Part 2. Prototype implementation and its integration with relational databases

Timo Niemi, Kalervo Järvelin, 1992, Inf. Syst..

A deductive data model for query expansion

Timo Niemi, Kalervo Järvelin, Eero Sormunen, 1996, SIGIR '96.

An NF2 Relational Interface with Aggregation Capability for Document Retrieval, Restructuring and Analysis

Timo Niemi, Kalervo Järvelin, 2002 .

Informetrics through Advanced Data Management. Complex Object Restructuring, Data Aggregation and Transitive Computation

Peter Ingwersen, Timo Niemi, Kalervo Järvelin, 1999 .

A query language for discovering semantic associations, Part II: sample queries and query evaluation

Timo Niemi, Janne Jämsen, 2007 .

An Entity-Based Approach to Query Processing in Relational Databases. Part II: Entity Query Construction and Updating

Timo Niemi, Kalervo Järvelin, 1993, Data Knowl. Eng..

Data conversion, aggregation and deduction for advanced retrieval from the heterogeneous fact databases

Timo Niemi, Kalervo Järvelin, 1991, SIGIR '91.

An approach and its specification to data reformatting in data conversion

Timo Niemi, T. Niemi, 1988, Inf. Syst..

Analysis of the processes in fluidized bed boiler furnaces during load changes

Timo Niemi, Sirpa Kallio, Juho Peltola, 2017 .

A query language for discovering semantic associations, Part I: Approach and formal definition of query primitives

Timo Niemi, Janne Jämsen, T. Niemi, 2007, J. Assoc. Inf. Sci. Technol..

A seven-tuple representation for hierarchical data structures

Timo Niemi, 1983, Inf. Syst..

Straightforward formalization of the relational model

Timo Niemi, Kalervo Järvelin, 1985, Inf. Syst..

Formal restructuring functions for hierarchical data bases

Timo Niemi, 2004, International Journal of Computer & Information Sciences.

Conversion of flat files and hierarchical data bases

Timo Niemi, 1985 .

Advanced query language for manipulating complex entities

Marko Junkkari, Timo Niemi, Kalervo Järvelin, 2004, Inf. Process. Manag..

Prolog-Based Meta-Rules For Relational Database Representation and Manipulation

Timo Niemi, Kalervo Järvelin, K. Järvelin, 1991, IEEE Trans. Software Eng..

A straightforward formalization of the relational model

Timo Niemi, Kalervo Järvelin, 1983, SGMD.

Operation-oriented query language approach for recursive queries - Part 1. Functional definition

Timo Niemi, Kalervo Järvelin, 1992, Inf. Syst..

The duality in new media -aggregated network sociality : transcoding between databases and networks described through SNS

Timo Niemi, 2010 .

Bio-CLC Pilot Scale Experiments Combined with CFD Simulations: How To Improve the Performance by Better Design?

Timo Niemi, Toni Pikkarainen, Juho Peltola, 2018 .

ExpansionTool: Concept-Based Query Expansion and Construction

Jaana Kekäläinen, Timo Niemi, Kalervo Järvelin, 2001, Information Retrieval.

Multidimensional Data Model and Query Language for Informetrics

Timo Niemi, Kalervo Järvelin, Lasse Hirvonen, 2003, J. Assoc. Inf. Sci. Technol..

Advanced Query Formulation in Deductive Databases

Timo Niemi, Kalervo Järvelin, K. Järvelin, 1992, Inf. Process. Manag..

Deductive Information Retrieval Based on Classifications

Timo Niemi, Kalervo Järvelin, K. Järvelin, 1993, J. Am. Soc. Inf. Sci..

Concept-based query language approach to enterprise information systems

Marko Junkkari, Timo Niemi, Kalervo Järvelin, 2014, Enterp. Inf. Syst..

Parametric study of the time-averaged gas–solid drag force in circulating fluidized bed conditions

Timo Niemi, Sirpa Kallio, Juho Peltola, 2014 .

An approach for developing a schemaless XML dataspace profiling system

Timo Niemi, Turkka Näppilä, 2012, J. Inf. Sci..

ExpansionTool: Formal definition of concept-based query expansion and construction

Jaana Kekäläinen, Timo Niemi, Kalervo Järvelin, 2001 .