Publications

Journal Papers

  • Zorik Gekhman, Nadav Oved, Orgad Keller, Idan Szpektor, Roi Reichart: On the Robustness of Dialogue History Representation in Conversational Question Answering: A Comprehensive Study and a New Prompt-based Method. Trans. Assoc. Comput. Linguistics 11: 351–366 (2023) [PDF].

  • Orgad Keller, Avinatan Hassidim, Noam Hazon: Approximating Weighted and Priced Bribery in Scoring Rules. J. Artif. Intell. Res. 66: 1057-1098 (2019) (a subset of the results appeared as Approximating Bribery in Scoring Rules, AAAI 2018) [PDF].

  • Orgad Keller, Avinatan Hassidim, Noam Hazon: New Approximations for Coalitional Manipulation in Scoring Rules. J. Artif. Intell. Res. 64: 109-145 (2019) (a subset of the results appeared as New Approximation for Borda Coalitional Manipulation, AAMAS 2017) [PDF], [code].

  • Orgad Keller, Tsvi Kopelowitz, Shir Landau, Moshe Lewenstein: Generalized Substring Compression. Theor. Comput. Sci. 525: 42-52 (2014) (preliminary version in CPM 2009) [PDF].

  • Amihood Amir, Estrella Eisenberg, Orgad Keller, Avivit Levy, Ely Porat: Approximate String Matching with Stuck Address Bits. Theor. Comput. Sci. 412(29): 3537-3544 (2011) (preliminary version in SPIRE 2010) [PDF].

  • Orgad Keller, Tsvi Kopelowitz, Moshe Lewenstein: On the Longest Common Parameterized Subsequence. Theor. Comput. Sci. 410(51): 5347-5353 (2009) (preliminary version in CPM 2008) [PDF].

 

 

Conference Proceedings

  • Paul Roit, Johan Ferret, Lior Shani, Roee Aharoni, Geoffrey Cideron, Robert Dadashi, Matthieu Geist, Sertan Girgin, Léonard Hussenot, Orgad Keller, Nikola Momchev, Sabela Ramos, Piotr Stanczyk, Nino Vieillard, Olivier Bachem, Gal Elidan, Avinatan Hassidim, Olivier Pietquin, Idan Szpektor: Factually Consistent Summarization via Reinforcement Learning with Textual Entailment Feedback. ACL 2023: To appear.

  • Avishai Zagoury, Orgad Keller, Avinatan Hassidim, Noam Hazon: Targeted Negative Campaigning: Complexity and Approximations. AAAI 2021: 35(6), 5768-5778 [PDF].

  • Eyal Ben-David, Orgad Keller, Eric Malmi, Idan Szpektor, Roi Reichart: Semantically Driven Sentence Fusion: Modeling and Evaluation. Findings of EMNLP 2020, 1491–1505 [PDF].

  • Idan Szpektor, Deborah Cohen, Gal Elidan, Michael Fink, Avinatan Hassidim, Orgad Keller, Sayali Kulkarni, Eran Ofek, Sagie Pudinsky, Asaf Revach, Shimi Salant, Yossi Matias: Dynamic Composition for Domain Exploration Dialogues. WWW 2020, 872-883 [PDF].

  • Raphael Cohen, Orgad Keller, Jason Levy, Amit Ashkenazi, Russell Levy, Micha Breakstone: Fully Automatic Speaker Separation System, with Automatic Enrolling of Recurrent Speakers. Interspeech 2018, 1964-1965 [PDF].

  • Orgad Keller, Avinatan Hassidim, Noam Hazon: Approximating Bribery in Scoring Rules. AAAI 2018: 32(1) [PDF] (full version in JAIR: [PDF]).

  • Orgad Keller, Avinatan Hassidim, Noam Hazon: New Approximation for Borda Coalitional Manipulation. AAMAS 2017: 606-614 [code][PDF] (published by www.ifaamas.org) (full version in JAIR: [PDF]).

  • Avinatan Hassidim, Orgad Keller, Moshe Lewenstein, Liam Roditty: Finding the Minimum-Weight k-Path. WADS 2013: 390-401 (full version: [PDF]).

  • Amihood Amir, Estrella Eisenberg, Orgad Keller, Avivit Levy, Ely Porat: Approximate String Matching with Stuck Address Bits. SPIRE 2010: 395-405 (full version in TCS: [PDF])

  • Orgad Keller, Tsvi Kopelowitz, Shir Landau, Moshe Lewenstein: Generalized Substring Compression. CPM 2009: 26-38 (full version in TCS: [PDF]).

  • Orgad Keller, Tsvi Kopelowitz, Moshe Lewenstein: On the Longest Common Parameterized Subsequence. CPM 2008: 303-315 (full version in TCS: [PDF]).

  • Orgad Keller, Tsvi Kopelowitz, Moshe Lewenstein: Range Non-overlapping Indexing and Successive List Indexing. WADS 2007: 625-636 [PDF].