2 Search Results for "Engels, Christiane"

Document
DOI: 10.4230/OASIcs.ICPEC.2026.5
Introducing Programming Concepts Through Montessori Materials

Authors: Steffi Rudel and Marlene Engels

Published in: OASIcs, Volume 145, 7th International Computer Programming Education Conference (ICPEC 2026)

Abstract
Programming is a skill already taught in many schools today. However, for historical reasons, it has not yet been included in the Montessori method. To close this gap, we developed learning materials for Montessori schools and present them in this article. We show the design of a new learning material for introducing programming concepts in Montessori elementary level (6-12 years). The material is a concrete physical learning material and is supported by a modular lesson structure, which also takes the principles of Computational Thinking in account. Finally we discuss its suitability for Montessori education based on expert feedback. The article shows interesting examples of how programming can be taught in Montessori elementary level.
Cite as

Steffi Rudel and Marlene Engels. Introducing Programming Concepts Through Montessori Materials. In 7th International Computer Programming Education Conference (ICPEC 2026). Open Access Series in Informatics (OASIcs), Volume 145, pp. 5:1-5:14, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2026)

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@InProceedings{rudel_et_al:OASIcs.ICPEC.2026.5,
  author =	{Rudel, Steffi and Engels, Marlene},
  title =	{{Introducing Programming Concepts Through Montessori Materials}},
  booktitle =	{7th International Computer Programming Education Conference (ICPEC 2026)},
  pages =	{5:1--5:14},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-443-7},
  ISSN =	{2190-6807},
  year =	{2026},
  volume =	{145},
  editor =	{Portela, Filipe and Matos, Lu{\'\i}s and Guimar\~{a}es, Tiago},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.ICPEC.2026.5},
  URN =		{urn:nbn:de:0030-drops-267424},
  doi =		{10.4230/OASIcs.ICPEC.2026.5},
  annote =	{Keywords: Montessori Method, Programming, Montessori Material, Computational Thinking}
}
Document
DOI: 10.4230/LIPIcs.TIME.2018.11
Algebraic Operators for Processing Sets of Temporal Intervals in Relational Databases

Authors: Andreas Dohr, Christiane Engels, and Andreas Behrend

Published in: LIPIcs, Volume 120, 25th International Symposium on Temporal Representation and Reasoning (TIME 2018)

Abstract
The efficient management of temporal data has become increasingly important for many database applications. Most commercial systems already allow the management of temporal data but the operational support for processing this data is still rather limited. One particular reason is that many extension proposals typically require considerable modifications of the underlying database engine. In this paper, we propose a lightweight solution where temporal operators are realized using a library of user-defined functions. This way the complexity of temporal queries can be drastically reduced leading to more readable and less error-prone code without touching the database system. Our experiments show that the proposed operators significantly outperform temporal queries formulated in pure SQL. In addition, we investigate the possibility to incorporate algebraic optimization strategies directly into our operator definitions which allow for further performance improvements.
Cite as

Andreas Dohr, Christiane Engels, and Andreas Behrend. Algebraic Operators for Processing Sets of Temporal Intervals in Relational Databases. In 25th International Symposium on Temporal Representation and Reasoning (TIME 2018). Leibniz International Proceedings in Informatics (LIPIcs), Volume 120, pp. 11:1-11:16, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2018)

Copy BibTex To Clipboard

@InProceedings{dohr_et_al:LIPIcs.TIME.2018.11,
  author =	{Dohr, Andreas and Engels, Christiane and Behrend, Andreas},
  title =	{{Algebraic Operators for Processing Sets of Temporal Intervals in Relational Databases}},
  booktitle =	{25th International Symposium on Temporal Representation and Reasoning (TIME 2018)},
  pages =	{11:1--11:16},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-089-7},
  ISSN =	{1868-8969},
  year =	{2018},
  volume =	{120},
  editor =	{Alechina, Natasha and N{\o}rv\r{a}g, Kjetil and Penczek, Wojciech},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.TIME.2018.11},
  URN =		{urn:nbn:de:0030-drops-97769},
  doi =		{10.4230/LIPIcs.TIME.2018.11},
  annote =	{Keywords: Temporal Databases, Relational Operators, Situation Calculus}
}
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