Sigrid Ewert

32 papers C 5Journal 21Unranked 6
YearRankTypeTitle / Venue / Authors
2025 J jnl
Automatic Feedback Generation for the Learning of Regular Expressions.
ACM Trans. Comput. Educ.
Olaperi Okuboyejo, Sigrid Ewert, Ian Douglas Sanders
2021 J jnl
Ogden's Lemma for Subclasses of Random Context Galleries.
J. Autom. Lang. Comb.
Sigrid Ewert, Joy Idahosa
2020 J jnl
Necessary Conditions for Subclasses of Random Context Galleries.
J. Autom. Lang. Comb.
Sigrid Ewert, Daria Sergeevna Tkachova
2019 J jnl
Bag context picture grammars.
J. Comput. Lang.
Sigrid Ewert, Nuru Jingili, Liemiso Mpota, Ian D. Sanders
2018 C conf
Measuring Perceptual Similarity of Syntactically Generated Pictures.
SIMULTECH
Nuru Jingili, Sigrid Ewert, Ian D. Sanders
2017 — conf
Describing Resource Allocation to Dynamically Formed Groups with Grammars.
SIMULTECH (Selected Papers)
Suna Bensch, Sigrid Ewert
2017 C conf
Modelling the Formation of Virtual Buying Cooperatives with Grammars of Regulated Rewriting.
SIMULTECH
Suna Bensch, Sigrid Ewert, Mpho Raborife
2015 J jnl
Improving a tone labeling algorithm for Sesotho.
Lang. Resour. Evaluation
Mpho Raborife, Sigrid Ewert, Sabine Zerbian
2015 C conf
Introducing Code Adviser: A DFA-driven Electronic Programming Tutor.
CIAA
Abejide Ade-Ibijola, Sigrid Ewert, Ian Douglas Sanders
2014 — conf
Abstracting and Narrating Novice Programs Using Regular Expressions.
SAICSIT
Abejide Ade-Ibijola, Sigrid Ewert, Ian D. Sanders
2014 — conf
Perceptual Similarity of Images Generated using Tree Grammars.
SAICSIT
Benjamin Okundaye, Sigrid Ewert, Ian D. Sanders
2013 J jnl
Necessary conditions for subclasses of random context languages.
Theor. Comput. Sci.
Sigrid Ewert, Andries P. J. van der Walt
2012 — conf
Empirical measurements on a Sesotho tone labeling algorithm.
SLTU
Mpho Raborife, Sabine Zerbian, Sigrid Ewert
2012 — conf
Generalized Random Context Picture Grammars: The State of the Art.
Languages Alive
Sigrid Ewert, Max Rabkin
2008 J jnl
Bag Context Tree Grammars.
Fundam. Informaticae
Frank Drewes, Christine du Toit, Sigrid Ewert, Brink van der Merwe, Andries P. J. van der Walt
2007 J jnl
Table-Driven Context-Free Picture Grammars.
Int. J. Found. Comput. Sci.
Charita Bhika, Sigrid Ewert, Ryan Schwartz, Mutahi Waruhiu
2006 J jnl
A note on the generative capacity of random context.
South Afr. Comput. J.
Bradley Atcheson, Sigrid Ewert, Dylan A. Shell
2006 C conf
Bag Context Tree Grammars.
Developments in Language Theory
Frank Drewes, Christine du Toit, Sigrid Ewert, Brink van der Merwe, Andries P. J. van der Walt
2006 J jnl
Translating mutually recursive function systems into generalized random context picture grammars.
South Afr. Comput. J.
H. Kruger, Sigrid Ewert
2005 J jnl
Random context tree grammars and tree transducers.
South Afr. Comput. J.
Frank Drewes, Christine du Toit, Sigrid Ewert, Johanna Högberg, Brink van der Merwe, Andries P. J. van der Walt
2004 J jnl
GRIFFIN : an automated grcpg and IFS processing tool.
South Afr. Comput. J.
Nicole Boden, Bradley Atcheson, Sigrid Ewert
2003 J jnl
A property of random context picture grammars.
Theor. Comput. Sci.
Andries P. J. van der Walt, Sigrid Ewert
2003 J jnl
Computing Raster Images from Grid Picture Grammars.
J. Autom. Lang. Comb.
Frank Drewes, Sigrid Ewert, Renate Klempien-Hinrichs, Hans-Jörg Kreowski
2003 — conf
The Power and Limitations of Random Context.
Grammars and Automata for String Processing
Sigrid Ewert, Andries P. J. van der Walt
2002 J jnl
A pumping lemma for random permitting context languages.
Theor. Comput. Sci.
Sigrid Ewert, Andries P. J. van der Walt
2001 J jnl
Processing context-sensing picture grammars on a network.
South Afr. Comput. J.
Sigrid Ewert, T. Wessels
2000 J jnl
A shrinking lemma for random forbidding context languages.
Theor. Comput. Sci.
Andries P. J. van der Walt, Sigrid Ewert
2000 C conf
Computing Raster Images from Grid Picture Grammars.
CIAA
Frank Drewes, Sigrid Ewert, Renate Klempien-Hinrichs, Hans-Jörg Kreowski
1999 J jnl
A Hierarchy Result for Random Forbidding Context Picture Grammars.
Int. J. Pattern Recognit. Artif. Intell.
Sigrid Ewert, Andries P. J. van der Walt
1999 J jnl
Generating Pictures Using Random Permitting Context.
Int. J. Pattern Recognit. Artif. Intell.
Sigrid Ewert, Andries P. J. van der Walt
1999 J jnl
Shrink Indecomposable Fractals.
J. Univers. Comput. Sci.
Sigrid Ewert, Andries P. J. van der Walt
1998 J jnl
Generating Pictures Using Random Forbidding Context.
Int. J. Pattern Recognit. Artif. Intell.
Sigrid Ewert, Andries P. J. van der Walt