@article{32810, author = {{Li, Jiaao and Ma, Yulai and Shi, Yongtang and Wang, Weifan and Wu, Yezhou}}, issn = {{0195-6698}}, journal = {{European Journal of Combinatorics}}, keywords = {{Discrete Mathematics and Combinatorics}}, publisher = {{Elsevier BV}}, title = {{{On 3-flow-critical graphs}}}, doi = {{10.1016/j.ejc.2021.103451}}, volume = {{100}}, year = {{2021}}, } @article{23456, author = {{Mattiolo, Davide and Steffen, Eckhard}}, issn = {{0364-9024}}, journal = {{Journal of Graph Theory}}, keywords = {{factorization, perfect matchings, regular graphs, r-graphs}}, number = {{1}}, pages = {{107--116}}, title = {{{Highly edge‐connected regular graphs without large factorizable subgraphs}}}, doi = {{10.1002/jgt.22729}}, volume = {{99}}, year = {{2021}}, } @article{21827, author = {{Klopp, Antje and Steffen, Eckhard}}, issn = {{0911-0119}}, journal = {{Graphs and Combinatorics}}, pages = {{559--580}}, title = {{{Fractional Matchings, Component-Factors and Edge-Chromatic Critical Graphs}}}, doi = {{10.1007/s00373-020-02266-6}}, year = {{2021}}, } @article{13445, author = {{Steffen, Eckhard and Vogel, Alexander}}, journal = {{European J. Combinatorics}}, title = {{{Concepts of signed graph coloring}}}, volume = {{91}}, year = {{2021}}, } @article{13114, author = {{Lu, You and Luo, Rong and Schubert, Michael and Steffen, Eckhard and Zhang, Cun-Quan}}, journal = {{SIAM J. Discrete Math}}, pages = {{2166--2187}}, title = {{{Flows on signed graphs without long barbells}}}, doi = {{10.1137/18M1222818}}, volume = {{34 (4)}}, year = {{2020}}, } @article{12971, author = {{Jin, Ligang and Steffen, Eckhard}}, journal = {{J. of Combinatorics}}, pages = {{457--473}}, title = {{{Unions of 1-factors in r-graphs and overfull graphs}}}, volume = {{11}}, year = {{2020}}, } @inproceedings{6252, author = {{Senft, Björn and Oberthür, Simon and Fischer, Holger Gerhard}}, booktitle = {{Schriften zur allgemeinen Hochschuldidaktik - Band 3. Tagungsband Forschendes Lernen - The wider view}}, isbn = {{978 3-95987-088-7}}, title = {{{Forschendes Lernen in der Informatik - In praxisnaher Projektgruppe einen Softwareentwicklungsprozess erforschen}}}, year = {{2018}}, } @inbook{6253, author = {{Senft, Björn and Fischer, Holger Gerhard and Oberthür, Simon and Patkar, Nitish}}, booktitle = {{Design, User Experience, and Usability: Theory and Practice}}, isbn = {{9783319917962}}, issn = {{0302-9743}}, location = {{Las Vegas, USA}}, pages = {{758--770}}, publisher = {{Springer International Publishing}}, title = {{{Assist Users to Straightaway Suggest and Describe Experienced Problems}}}, doi = {{10.1007/978-3-319-91797-9_52}}, volume = {{10918}}, year = {{2018}}, } @inbook{6254, author = {{Fischer, Holger Gerhard and Senft, Björn and Rittmeier, Florian and Sauer, Stefan}}, booktitle = {{Design, User Experience, and Usability: Theory and Practice. Proceedings of the 20th International Conference on Human-Computer Interaktion (HCI International 2018)}}, editor = {{Marcus, Aaron and Wang, Wentao}}, isbn = {{9783319917962}}, issn = {{0302-9743}}, location = {{Las Vegas, USA}}, pages = {{711--724}}, publisher = {{Springer International Publishing}}, title = {{{A Canvas Method to Foster Interdisciplinary Discussions on Digital Assistance Systems}}}, doi = {{10.1007/978-3-319-91797-9_49}}, volume = {{10918}}, year = {{2018}}, } @inbook{16938, author = {{Engels, Gregor and Maier, Günter W. and Ötting, Sonja K. and Steffen, Eckhard and Teetz, Alexander}}, booktitle = {{Zukunft der Arbeit – Eine praxisnahe Betrachtung}}, editor = {{Wischmann, Steffen and Hartmann, Ernst Andreas}}, isbn = {{9783662492659}}, pages = {{221--231}}, publisher = {{Springer Verlag}}, title = {{{Gerechtigkeit in flexiblen Arbeits- und Managementprozessen}}}, doi = {{10.1007/978-3-662-49266-6_16}}, year = {{2018}}, } @article{10129, abstract = {{There are many hard conjectures in graph theory, like Tutte's 5-flow conjecture, and the 5-cycle double cover conjecture, which would be true in general if they would be true for cubic graphs. Since most of them are trivially true for 3-edge-colorable cubic graphs, cubic graphs which are not 3-edge-colorable, often called snarks, play a key role in this context. Here, we survey parameters measuring how far apart a non 3-edge-colorable graph is from being 3-edge-colorable. We study their interrelation and prove some new results. Besides getting new insight into the structure of snarks, we show that such measures give partial results with respect to these important conjectures. The paper closes with a list of open problems and conjectures.}}, author = {{Fiol, M. A. and Mazzuoccolo, Guiseppe and Steffen, Eckhard}}, journal = {{The Electronic Journal of Combinatorics}}, keywords = {{Cubic graph, Tait coloring, Snark, Boole coloring, Berge's conjecture, Tutte's 5-flow conjecture}}, number = {{4}}, title = {{{Measures of Edge-Uncolorability of Cubic Graphs}}}, volume = {{25}}, year = {{2018}}, } @article{10130, author = {{Rollová, Edita and Schubert, Michael and Steffen, Eckhard}}, journal = {{The Electronic Journal of Combinatorics}}, number = {{2}}, title = {{{Flows in Signed Graphs with Two Negative Edges }}}, doi = {{10.37236/4458}}, volume = {{25}}, year = {{2018}}, } @article{10132, author = {{Jin, Ligang and Mazzuoccolo, Giuseppe and Steffen, Eckhard}}, issn = {{1234-3099}}, journal = {{Discussiones Mathematicae Graph Theory}}, pages = {{165--175}}, title = {{{Cores, joins and the Fano-flow conjectures}}}, doi = {{10.7151/dmgt.1999}}, volume = {{38}}, year = {{2018}}, } @article{10142, author = {{Steffen, Eckhard}}, journal = {{Australasian Journal of Combinatorics}}, number = {{1}}, pages = {{153--160}}, title = {{{Approximating Vizing’s independence number conjecture}}}, volume = {{71}}, year = {{2018}}, } @inbook{6255, author = {{Fischer, Holger Gerhard and Engler, Michael and Sauer, Stefan}}, booktitle = {{Design, User Experience, and Usability: Theory, Methodology, and Management}}, isbn = {{9783319586335}}, issn = {{0302-9743}}, location = {{Vancouver, Canada}}, pages = {{570--583}}, publisher = {{Springer International Publishing}}, title = {{{A Human-Centered Perspective on Software Quality: Acceptance Criteria for Work 4.0}}}, doi = {{10.1007/978-3-319-58634-2_42}}, volume = {{10288}}, year = {{2017}}, } @inproceedings{6256, author = {{Fischer, Holger Gerhard and Senft, Björn and Stahl, Katharina}}, booktitle = {{Wissenschafts- und Industrieforum 2017 - Intelligente Technische Systeme}}, editor = {{Bodden, Eric and Dressler, Falko and Dumitrescu, Roman and Gausemeier, Jürgen and Meyer auf der Heide, Friedhelm and Scheytt, Christoph and Trächtler, Ansgar}}, isbn = {{978-3-942647-88-5}}, pages = {{197--210}}, publisher = {{Verlagsschriftenreihe des Heinz Nixdorf Instituts}}, title = {{{Akzeptierte Assistenzsysteme in der Arbeitswelt 4.0 durch systematisches Human-Centered Software Engineering}}}, doi = {{10.17619/UNIPB/1-93}}, volume = {{369}}, year = {{2017}}, } @proceedings{6305, editor = {{Hess, Steffen and Fischer, Holger Gerhard}}, publisher = {{Gesellschaft für Informatik e.V. und German UPA e.V.}}, title = {{{Mensch und Computer 2017 - Usability Professionals. Tagungsband}}}, year = {{2017}}, } @book{10146, editor = {{Maier, Günter W. and Engels, Gregor and Steffen, Eckhard}}, publisher = {{Springer Berlin Heidelberg}}, title = {{{Handbuch Gestaltung digitaler und vernetzter Arbeitswelten}}}, year = {{2017}}, } @inbook{10147, author = {{Simon, Dagmar and Steffen, Eckhard}}, booktitle = {{Handbuch Gestaltung digitaler und vernetzter Arbeitswelten,}}, editor = {{Maier, Günter W. and Engels, Gregor and Steffen, Eckhard}}, pages = {{1--12}}, publisher = {{Springer Berlin Heidelberg}}, title = {{{Digitale Zukunft: ein inter- und transdisziplinäres Thema}}}, year = {{2017}}, } @article{10155, author = {{Mazzuoccolo, Guiseppe and Steffen, Eckhard}}, journal = {{J. Graph Theory}}, pages = {{363 – 371 }}, title = {{{Nowhere-zero 5-flows on cubic graphs with oddness 4}}}, volume = {{85}}, year = {{2017}}, }