Browsing by Author "Heino, Erkki"

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  • AATOS – A configurable tool for automatic annotation
    (2017) Tamper, Minna; Leskinen, Petri; Ikkala, Esko; Oksanen, Arttu; Mäkelä, Eetu; Heino, Erkki; Tuominen, Jouni; Koho, Mikko; Hyvönen, Eero
     A4 Artikkeli konferenssijulkaisussa
    This paper presents an automatic annotation tool AATOS for providing documents with semantic annotations. The tool links entities found from the texts to ontologies defined by the user. The application is highly configurable and can be used with different natural language Finnish texts. The application was developed as a part of the WarSampo (http://seco.cs.aalto.fi/projects/sotasampo/en/) and Semantic Finlex (http://seco.cs.aalto.fi/projects/lawlod/en/) projects and tested using Kansa Taisteli magazine articles and consolidated Finnish legislation of Semantic Finlex. The quality of the automatic annotation was evaluated by measuring precision and recall against existing manual annotations. The results showed that the quality of the input text, as well as the selection and configuration of the ontologies impacted the results.
  • Integrating prisoners of war dataset into the WarSampo linked data infrastructure
    (2018-03-29) Koho, Mikko; Heino, Erkki; Ikkala, Esko; Hyvönen, Eero; Nikkilä, Reijo; Moilanen, Tiia; Miettinen, Katri; Suominen, Pertti
     A4 Artikkeli konferenssijulkaisussa
    One of the great promises of Linked Data and the Semantic Web standards is to provide a shared data infrastructure into which more and more data can be imported and aligned, forming a sustainable, ever growing knowledge graph or linked data cloud, Web of Data. This paper studies and evaluates this idea in the context of the War Sampo Linked Data cloud, providing an infrastructure for data related to the Second World War in Finland. As a case study, a new database of prisoners of war with related contents is transformed into linked data and integrated into War Sampo. Lessons learned are discussed in relation to using traditional data publishing approaches.
  • Linked death - Representing, publishing, and using Second World War death records as linked open data
    (2016) Koho, Mikko; Hyvönen, Eero; Heino, Erkki; Tuominen, Jouni; Leskinen, Petri; Mäkelä, Eetu
     A4 Artikkeli konferenssijulkaisussa
    War history of the Second World War (WW2), humankind's largest disaster, is of great interest to both laymen and researchers. Most of us have ancestors and relatives who participated in the war, and in the worst case got killed. Researchers are eager to find out what actually happened then, and even more importantly why, so that future wars could perhaps be prevented. The darkest data of war history are casualty records-from such data we could perhaps learn most about the war. This paper presents a model and system for representing death records as linked data, so that 1) citizens could find out more easily what happened to their relatives during WW2 and 2) digital humanities (DH) researchers could (re)use the data easily for research.
  • Linked Death—Representing, Publishing, and Using Second World War Death Records as Linked Open Data
    (2017) Koho, Mikko; Hyvönen, Eero; Heino, Erkki; Tuominen, Jouni; Leskinen, Petri; Mäkelä, Eetu
     A4 Artikkeli konferenssijulkaisussa
    War history of the Second World War (WW2), humankind’s largest disaster, is of great interest to both laymen and researchers. Most of us have ancestors and relatives who participated in the war, and in the worst case got killed. Researchers are eager to find out what actually happened then, and even more importantly why, so that future wars could perhaps be prevented. The darkest data of war history are casualty records—from such data we could perhaps learn most about the war. This paper presents a model and system for representing death records as linked data, so that (1) citizens could find out more easily what happened to their relatives during WW2 and (2) digital humanities (DH) researchers could (re)use the data easily for research.
  • Named entity linking in a complex domain: Case second world war history
    (2017) Heino, Erkki; Tamper, Minna; Mäkelä, Eetu; Leskinen, Petri; Ikkala, Esko; Tuominen, Jouni; Koho, Mikko; Hyvönen, Eero
     A4 Artikkeli konferenssijulkaisussa
    This paper discusses the challenges of applying named entity linking in a rich, complex domain – specifically, the linking of (1) military units, (2) places and (3) people in the context of interlinked Second World War data. Multiple sub-scenarios are discussed in detail through concrete evaluations, analyzing the problems faced, and the solutions developed. A key contribution of this work is to highlight the heterogeneity of problems and approaches needed even inside a single domain, depending on both the source data as well as the target authority.
  • An Ontology and Data Infrastructure for Publishing and Using Biographical Linked Data
    (2017-10-22) Leskinen, Petri; Tuominen, Jouni; Heino, Erkki; Hyvönen, Eero
     A4 Artikkeli konferenssijulkaisussa
    This paper describes the ontology model and published datasets of a digitized biographical person register. The applied ontology model is designed to represent people via their enduring roles and perduring lifetime events. The model is designed to support 1) prosopographical Digital Humanities research, 2) linking to resources in semantic Cultural Heritage portals, and 3) semantic data validation and enrichment by using SPARQL queries. The linked data approach enables to enrich a person’s biography by interlinking it with space and time related biographical events, persons relating by social contacts or family relations, historical events, and personal achievements.
  • Prosopographical Views to Finnish WW2 Casualties Through Cemeteries and Linked Open Data
    (2017-10-22) Ikkala, Esko; Koho, Mikko; Heino, Erkki; Leskinen, Petri; Hyvönen, Eero; Ahoranta, Tomi
     A4 Artikkeli konferenssijulkaisussa
    This paper presents an application for studying the death records of WW2 casualties from a prosopograhical perspective, provided by the various local military cemeteries where the dead were buried. The idea is to provide the end user with a global visual map view on the places in which the casualties were buried as well as with a local historical perspective on what happened to the casualties that lay within a particular cemetery of a village or town. Plenty of data exists about the Second World War (WW2), but the data is typically archived in unconnected, isolated silos in different organizations. This makes it difficult to track down, visualize, and study information that is contained within multiple distinct datasets. In our work, this problem is solved using aggregated Linked Open Data provided by the WarSampo Data Service and SPARQL endpoint.
  • Publishing Second World War History as Linked Data Events on the Semantic Web
    (2016-07-01) Hyvönen, Eero; Heino, Erkki; Leskinen, Petri; Ikkala, Esko; Koho, Mikko; Tamper, Claire; Tuominen, Jouni; Mäkelä, Eetu
     A4 Artikkeli konferenssijulkaisussa
    Data about wars is typically heterogeneous, distributed in the data silos of the fighting parties, multilingual, and often controversial depending on the political point of view. It is therefore hard for the historians to get a global picture of what has actually happened, to whom, where, when, and how. We argue that Semantic Web and Linked Data technologies are a very promising approach for modeling, harmonizing, and aggregating data about war history. Our goal is to make it possible, for both historians and laymen, to study history in a contextualized way where linked datasets enrich each other. The paper presents the in-use WarSampo 1 system, where massive collections of heterogeneous data about the (Finnish) history of the Second World War are harmonized using an event-based approach, and provided as a Linked Open Data service for applications to use. As a use case, a semantic portal WarSampo providing six different perspectives to the war based on events is presented.
  • Rautamalmikaivos Kolarin Rautuvaaraan
    (1966) Heino, Erkki
     Helsinki University of Technology | Master's thesis
  • Reassembling and enriching the life stories in printed biographical registers: Norssi high school alumni on the semantic web
    (2017) Hyvönen, Eero; Leskinen, Petri; Heino, Erkki; Tuominen, Jouni; Sirola, Laura
     A4 Artikkeli konferenssijulkaisussa
    This paper presents the idea to enrich printed biographical person registers with linked data related to events that took place after the register was published. By transforming printed historical documents into structured data, semantic search to written texts can be provided for the reader. Even more importantly, life stories of historical persons can be extended based on data linking by extracting semantic structures from printed texts, and by combining this data with external datasets and data services. Such linking provides an enriched context for prosopographical research on people in the register, as well as an enhanced reading experience for anyone interested in reading the biographies. As a concrete case study, a register 1867–1992 of over 10 000 alumni of the prominent Finnish high school “Norssi” was transformed into RDF, was enriched by data linking, was published as a linked data service, and is provided to end users via a faceted search engine and browser for studying lives of historical persons and for prosopographical research.
  • Second World War on the Semantic Web: The WarSampo Project and Semantic Portal
    (2015) Hyvönen, Eero; Tuominen, Jouni; Mäkelä, Eetu; Dutruit, Jérémie; Apajalahti, Kasper; Heino, Erkki; Leskinen, Petri; Ikkala, Esko
     A4 Artikkeli konferenssijulkaisussa
    This paper initiates and fosters work on publishing Linked Open Data about the Second World War. It is argued that the heterogeneous, distributed data about the international world war history makes a promising use case for semantic technologies. We hope that by making war data openly available we can learn from the past and promote peace.
  • SPARQL Faceter—Client-side Faceted Search Based on SPARQL
    (2016) Koho, Mikko; Heino, Erkki; Hyvönen, Eero
     A4 Artikkeli konferenssijulkaisussa
    The faceted search paradigm is widely used in web applica- tions, and there are various tools available for implementing it on the server side. In contrast, this paper presents an HTML based compo- nent tool on the client side that can be plugged on virtually any public SPARQL endpoint on the web, using only SPARQL API for data re- trieval. To test and demonstrate the idea and the tool, application of the tool in a large in-use semantic portal is presented.
  • Toffee - Semantic media search using topic modeling and relevance feedback
    (2018-10-11) Koho, Mikko; Heino, Erkki; Oksanen, Arttu; Hyvönen, Eero
     A4 Artikkeli konferenssijulkaisussa