Konrad Höffner

Konrad Höffner
University of Leipzig · Institute of Medical Informatics, Statistics and Epidemiology

Dr. rer. nat.

About

35
Publications
10,698
Reads
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882
Citations
Citations since 2016
21 Research Items
705 Citations
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2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
Additional affiliations
June 2016 - May 2020
University of Leipzig
Position
  • Research Associate
November 2011 - present
University of Leipzig
Position
  • PhD Student

Publications

Publications (35)
Chapter
Full-text available
SNIK is a knowledge base about the management of health information systems generated by extracting Linked Data from textbooks and other sources. SNIK describes functions, roles executing these functions, and entity types, the information used or updated by these functions. We present SNIK Quiz, a browser game in which students answer multiple-choi...
Preprint
BACKGROUND There is a variety of Libre/Free and Open Source Software (LIFOSS) products for medicine and healthcare. To support health care and IT professionals in selecting an appropriate software product for given tasks, several comparison studies and web platforms such as MEDFLOSS.org are available. However, due to the lack of a uniform terminolo...
Conference Paper
Full-text available
Having precise information about health IT evaluation studies is important for evidence-based decisions in medical informatics. In a former feasibility study, we used a faceted search based on ontological modeling of key elements of studies to retrieve precisely described health IT evaluation studies. However, extracting the key elements manually f...
Article
The web portal Medfloss.org lists over 360 medical free/libre and open source software (MEDFLOSS) projects. These projects are described with the help of a self-developed nomenclature. Due to inconsistencies, the nomenclature shall be replaced by HITO, the Health IT Ontology. HITO is developed iteratively based on different use cases. This paper ai...
Poster
Full-text available
Given a care delivery organization, its health information system can be defined as the part of the organization that processes and stores data, information, and knowledge. There is an enormous number of frameworks, textbooks and articles that describe the scope of health information system management from the perspective of medical informatics. Tr...
Poster
Full-text available
SNIK, a medical informatics ontology, combines knowledge from different literature sources dealing with the management of hospital information systems (HIS). Concepts and relations were extracted from literature, modeled as an ontology and visualized as a graph on a website. We demonstrate the potential of the graph visualization for tuitional scen...
Poster
Full-text available
Health informatics as a young discipline is still missing a clear and precise terminology. In the HITO – Health IT Ontology – project, teams of two collaborating universities aim to help the health IT community in this emerging issue by developing an ontology of health IT. Even though the project teams have domain knowledge in health informatics, i...
Working Paper
Full-text available
Information retrieval approaches are currently regarded as a key technology to empower lay users to access the Web of Data. To assist such need, a large number of approaches such as Question Answering and Semantic Search have been developed.While Question Answering promises accurate results by returning a specific answer, Semantic Search engines ar...
Article
Full-text available
The SNIK project converts textbooks about information management in hospitals to a domain ontology that provides a shared vocabulary for institutions to model and integrate processes, data and infrastructure. To accommodate user groups with different requirements and technical backgrounds, and to support incremental and cooperative development, we...
Article
Full-text available
Semantic Question Answering (SQA) removes two major access requirements to the Semantic Web: the mastery of a formal query language like SPARQL and knowledge of a specific vocabulary. Because of the complexity of natural language, SQA presents difficult challenges and many research opportunities. Instead of a shared effort, however, many essential...
Conference Paper
Full-text available
Information retrieval approaches are considered as a key technology to empower lay users to access the Web of Data. A large number of related approaches such as Question Answering and Semantic Search have been developed to address this problem. While Question Answering promises more accurate results by returning a specific answer, Semantic Search e...
Conference Paper
Full-text available
Statistical data in the form of RDF Data Cubes is becoming increasingly valuable as it influences decisions in areas such as health care, policy and finance. While a growing amount is becoming freely available through the open data movement, this data is opaque to laypersons. Semantic Question Answering (SQA) technologies provide intuitive access v...
Research
Full-text available
Statistical data in the form of RDF Data Cubes is becoming increasingly valuable as it influences decisions in areas such as health care, policy and finance. While a growing amount is becoming freely available through the open data movement, this data is opaque to laypersons. Semantic Question Answering (SQA) technologies provide access via free- f...
Conference Paper
Natural Language Query Formalization involves semantically parsing queries in natural language and translating them into their corresponding formal representations. It is a key component for developing question-answering (QA) systems on RDF data. The chosen formal representation language in this case is often SPARQL. In this paper, we propose a fra...
Article
Full-text available
There is a high public demand to increase transparency in government spending. Open spending data has the power to reduce corruption by increasing accountability and strengthens democracy because voters can make better informed decisions. An informed and trusting public also strengthens the government itself because it is more likely to commit to l...
Technical Report
Full-text available
Within the GeoKnow project, various tools are developed and integrated which aim to simplify managing geospatial Linked Data on the web. In this article, we summarise the state of the art and describe the status of open geospatial data on the web. We continue by presenting the Linked Data Stack as technical underpinning of GeoKnow and give a first...
Presentation
Full-text available
While the amount of data on the Web grows at 57 % per year, the Web of Science maintains a considerable amount of inertia, as yearly growth varies between 1.6 % and 14 %. On the other hand, the Web of Science consists of high quality information created and reviewed by the international community of researchers. While it is a complicated process to...
Conference Paper
Full-text available
Billions of facts pertaining to a multitude of domains are now available on the Web as RDF data. However, accessing this data is still a difficult endeavour for non-expert users. In order to meliorate the access to this data, approaches imposing minimal hurdles to their users are required. Although many question answering systems over Linked Data h...
Conference Paper
Full-text available
As an increasing amount of statistical data is published as linked data, intuitive ways of satisfying information needs and getting new insights out of the data become more and more important. Question answering systems provide such an intuitive interface by translating natural language queries into SPARQL, which is the native query language of RDF...
Conference Paper
Full-text available
As an increasing amount of RDF data is published as Linked Data, intuitive ways of accessing this data become more and more important. Natural language question answering approaches have been proposed as a good compromise between intuitiveness and expressiveness. We present a user interface for the template based question answering system which cov...
Conference Paper
Full-text available
Effective search in structured information based on textual user input is of high importance in thousands of applications. Query expansion methods augment the original query of a user with alternative query elements with similar meaning to increase the chance of retrieving appropriate resources. In this work, we introduce a number of new query expa...
Conference Paper
Full-text available
Link discovery plays a central role in the implementation of the Linked Data vision. In this demo paper, we present SAIM, a tool that aims to support users during the creation of high-quality link specifications. The tool implements a simple but effective workflow to creating initial link specifications. In addition, SAIM implements a variety of st...
Preprint
Full-text available
Preprint of https://www.researchgate.net/publication/287589277_User_Interface_for_a_Template_Based_Question_Answering_System
Conference Paper
Full-text available
Despite decades of effort, intelligent object search remains elusive. Neither search engine nor semantic web technologies alone have managed to provide usable systems for simple questions such as “find me a flat with a garden and more than two bedrooms near a supermarket.” We introduce deqa, a conceptual framework that achieves this elusive goal th...
Article
Full-text available
The Semantic Web eases data and information integration tasks by providing an infrastructure based on RDF and ontologies. In this paper, we contribute to the development of a spatial Data Web by elaborating on how the collaboratively collected OpenStreetMap data can be interactively transformed and represented adhering to the RDF data model. This t...
Technical Report
Full-text available
With the growth of the Linked Data Web, time-efficient approaches for computing links between data sources have become indispensable. Yet, in many cases, determining the right specification for a link discovery problem is a tedious task that must still be carried out manually. In this article we present RAVEN, an approach for the semi-automatic det...

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Projects (3)