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2,341 results on '"Ferreira, Rafael"'

1. Multi-trait User Simulation with Adaptive Decoding for Conversational Task Assistants

Author

Ferreira, Rafael, Semedo, David, and Magalhães, João

Subjects
Computer Science - Computation and Language, Computer Science - Artificial Intelligence, Computer Science - Human-Computer Interaction, I.2.7
Abstract

Conversational systems must be robust to user interactions that naturally exhibit diverse conversational traits. Capturing and simulating these diverse traits coherently and efficiently presents a complex challenge. This paper introduces Multi-Trait Adaptive Decoding (mTAD), a method that generates diverse user profiles at decoding-time by sampling from various trait-specific Language Models (LMs). mTAD provides an adaptive and scalable approach to user simulation, enabling the creation of multiple user profiles without the need for additional fine-tuning. By analyzing real-world dialogues from the Conversational Task Assistant (CTA) domain, we identify key conversational traits and developed a framework to generate profile-aware dialogues that enhance conversational diversity. Experimental results validate the effectiveness of our approach in modeling single-traits using specialized LMs, which can capture less common patterns, even in out-of-domain tasks. Furthermore, the results demonstrate that mTAD is a robust and flexible framework for combining diverse user simulators., Comment: Preprint from EMNLP 2024 Findings

Published
2024

6. Pathologic complete response rates of patients with ER-low/HER2-negative breast cancer treated with neoadjuvant pembrolizumab plus chemotherapy in the neo-real study

Author

Bonadio, Renata Colombo, Tavares, Monique Celeste, Balint, Flávia Cavalcanti, de Sousa, Isadora Martins, Comini, Ana Carolina Marin, Madasi, Fernanda, Bines, Jose, Ferreira, Rafael Dal Ponte, Rosa, Daniela Dornelles, Santos, Candice Lima, de Souza, Zenaide Silva, Assad-Suzuki, Daniele, de Araújo, Júlio Antônio Pereira, Gagliato, Débora de Melo, dos Anjos, Carlos Henrique, Zucchetti, Bruna M., Ferrari, Anezka, de Brito, Mayana Lopes, Cangussu, Renata, Monteiro, Maria Marcela Fernandes, Hoff, Paulo M., Testa, Laura, Estevez-Diz, Maria del Pilar, and Barroso-Sousa, Romualdo

Published
2025
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8. Refletindo sobre as contribuições da sociolinguística para o ensino de Português como Língua Adicional (PLA) = Reflecting upon the contributions from sociolinguistics to the teaching of Portuguese as Additional Language (PAL)

Author

Ferreira, Rafael Padilha

Subjects
sociolinguística, variação (linguística), língua adicional, linguística, Special aspects of education, LC8-6691
Abstract

Este trabalho busca elencar pressupostos da Sociolinguística Variacionista (SV) que são vistos como potenciais contribuidores para os processos de ensino e aprendizagem de Português Brasileiro. Seu objetivo é encontrar uma interface entre a SV e a metodologia de ensino de Português como Língua Adicional (PLA), na busca por elementos que contribuam para a formação docente e para a elaboração de materiais didáticos. Por meio de uma revisão bibliográfica, foi possível identificar que há vasta produção de materiais de formação docente e de ensino nas áreas de Sociolinguística e ensino de Português como Língua Materna, mas que ainda há espaço para discussão no que tange à produção de materiais semelhantes para o PLA. Defende-se, portanto, que há necessidade de desenvolvimento de estudos mais aprofundados com relação à formação docente e à elaboração de materiais didáticos de PLA que tenham como base os estudos da SV

Published
2018

9. Fixed oil from the Caatinga palm Syagrus coronata with effect on Complete Freund’s Adjuvant (CFA)-induced arthritis

Author

de Oliveira Alves, João Victor, da Rocha Barbosa, Bartira Victoria Dantas, da Silva Aguiar, Irivânia Fidelis, Galvão, Laís Ruanita Leopoldina, Ferreira, Rafael Jardim, de Lima Maux, Julliano Matheus, da Costa Silva Neto, Jacinto, de Oliveira, Alisson Macário, Napoleão, Thiago Henrique, dos Santos Correia, Maria Tereza, Costa, Wêndeo Kennedy, and da Silva, Marcia Vanusa

Published
2024
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10. Plan-Grounded Large Language Models for Dual Goal Conversational Settings

Author

Glória-Silva, Diogo, Ferreira, Rafael, Tavares, Diogo, Semedo, David, and Magalhães, João

Subjects
Computer Science - Computation and Language, Computer Science - Artificial Intelligence
Abstract

Training Large Language Models (LLMs) to follow user instructions has been shown to supply the LLM with ample capacity to converse fluently while being aligned with humans. Yet, it is not completely clear how an LLM can lead a plan-grounded conversation in mixed-initiative settings where instructions flow in both directions of the conversation, i.e. both the LLM and the user provide instructions to one another. In this paper, we tackle a dual goal mixed-initiative conversational setting where the LLM not only grounds the conversation on an arbitrary plan but also seeks to satisfy both a procedural plan and user instructions. The LLM is then responsible for guiding the user through the plan and, at the same time, adapting to new circumstances, answering questions, and activating safety guardrails when needed. We propose a novel LLM that grounds the dialogue on a procedural plan, can take the dialogue initiative, and enforces guardrails on the system's behavior, while also improving the LLM's responses to unexpected user behavior. Experiments in controlled settings and with real users show that the best-performing model, which we call PlanLLM, achieves a 2.1x improvement over a strong baseline. Moreover, experiments also show good generalization to unseen domains.

Published
2024

12. TWIZ-v2: The Wizard of Multimodal Conversational-Stimulus

Author

Ferreira, Rafael, Tavares, Diogo, Silva, Diogo, Valério, Rodrigo, Bordalo, João, Simões, Inês, Ramos, Vasco, Semedo, David, and Magalhães, João

Subjects
Computer Science - Computation and Language, Computer Science - Artificial Intelligence, I.2.7
Abstract

In this report, we describe the vision, challenges, and scientific contributions of the Task Wizard team, TWIZ, in the Alexa Prize TaskBot Challenge 2022. Our vision, is to build TWIZ bot as an helpful, multimodal, knowledgeable, and engaging assistant that can guide users towards the successful completion of complex manual tasks. To achieve this, we focus our efforts on three main research questions: (1) Humanly-Shaped Conversations, by providing information in a knowledgeable way; (2) Multimodal Stimulus, making use of various modalities including voice, images, and videos; and (3) Zero-shot Conversational Flows, to improve the robustness of the interaction to unseen scenarios. TWIZ is an assistant capable of supporting a wide range of tasks, with several innovative features such as creative cooking, video navigation through voice, and the robust TWIZ-LLM, a Large Language Model trained for dialoguing about complex manual tasks. Given ratings and feedback provided by users, we observed that TWIZ bot is an effective and robust system, capable of guiding users through tasks while providing several multimodal stimuli.

Published
2023

13. Rating Prediction in Conversational Task Assistants with Behavioral and Conversational-Flow Features

Author

Ferreira, Rafael, Semedo, David, and Magalhães, João

Subjects
Computer Science - Computation and Language, Computer Science - Artificial Intelligence, I.2.7
Abstract

Predicting the success of Conversational Task Assistants (CTA) can be critical to understand user behavior and act accordingly. In this paper, we propose TB-Rater, a Transformer model which combines conversational-flow features with user behavior features for predicting user ratings in a CTA scenario. In particular, we use real human-agent conversations and ratings collected in the Alexa TaskBot challenge, a novel multimodal and multi-turn conversational context. Our results show the advantages of modeling both the conversational-flow and behavioral aspects of the conversation in a single model for offline rating prediction. Additionally, an analysis of the CTA-specific behavioral features brings insights into this setting and can be used to bootstrap future systems.

Published
2023
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14. The Wizard of Curiosities: Enriching Dialogues with Fun Facts

Author

Vicente, Frederico, Ferreira, Rafael, Semedo, David, and Magalhães, João

Subjects
Computer Science - Computation and Language, I.2.7
Abstract

Introducing curiosities in a conversation is a way to teach something new to the person in a pleasant and enjoyable way. Enriching dialogues with contextualized curiosities can improve the users' perception of a dialog system and their overall user experience. In this paper, we introduce a set of curated curiosities, targeting dialogues in the cooking and DIY domains. In particular, we use real human-agent conversations collected in the context of the Amazon Alexa TaskBot challenge, a multimodal and multi-turn conversational setting. According to an A/B test with over 1000 conversations, curiosities not only increase user engagement, but provide an average relative rating improvement of 9.7%.

Published
2023

15. Grounded Complex Task Segmentation for Conversational Assistants

Author

Ferreira, Rafael, Semedo, David, and Magalhães, João

Subjects
Computer Science - Computation and Language, Computer Science - Artificial Intelligence, I.2.7
Abstract

Following complex instructions in conversational assistants can be quite daunting due to the shorter attention and memory spans when compared to reading the same instructions. Hence, when conversational assistants walk users through the steps of complex tasks, there is a need to structure the task into manageable pieces of information of the right length and complexity. In this paper, we tackle the recipes domain and convert reading structured instructions into conversational structured ones. We annotated the structure of instructions according to a conversational scenario, which provided insights into what is expected in this setting. To computationally model the conversational step's characteristics, we tested various Transformer-based architectures, showing that a token-based approach delivers the best results. A further user study showed that users tend to favor steps of manageable complexity and length, and that the proposed methodology can improve the original web-based instructional text. Specifically, 86% of the evaluated tasks were improved from a conversational suitability point of view.

Published
2023

16. Brazilian kefir fraction mitigates the Alzheimer-like phenotype in Drosophila melanogaster with β-amyloid overexpression model

Author

Malta, Serena Mares, Rodrigues, Tamiris Sabrina, Silva, Matheus Henrique, Marquez, Alexandre Souza, Ferreira, Rafael Bernardes, do Prado Mascarenhas, Fernanda Naves Araújo, Zanon, Renata Graciele, Bernardes, Lucas Matos Martins, Batista, Letícia Leandro, da Silva, Murillo Néia Thomaz, de Oliveira Santos, Débora, Santos, Ana Carolina Costa, Mendes-Silva, Ana Paula, Spindola, Foued Salmen, and Ueira-Vieira, Carlos

Published
2024
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17. Dose dense versus 3 weekly AC during neoadjuvant chemoimmunotherapy for triple negative breast cancer

Author

Bonadio, Renata Colombo, de Sousa, Isadora Martins, Balint, Flávia Cavalcanti, Comini, Ana Carolina Marin, Tavares, Monique Celeste, Madasi, Fernanda, Bines, Jose, Ferreira, Rafael Dal Ponte, Rosa, Daniela Dornelles, Santos, Candice Lima, de Souza, Zenaide Silva, Assad-Suzuki, Daniele, de Araújo, Júlio Antônio Pereira, Gagliato, Débora de Melo, dos Anjos, Carlos Henrique, Zucchetti, Bruna M., Ferrari, Anezka, de Brito, Mayana Lopes, Cangussu, Renata, Monteiro, Maria Marcela Fernandes, Hoff, Paulo M., Testa, Laura, and Barroso-Sousa, Romualdo

Published
2024
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22. Exploring multitasking proteins in Xanthomonas secretomes: Insights into mechanisms of plant-pathogen interactions

Author

Assis, Renata de Almeida Barbosa, Ferreira, Rafael Marini, de Oliveira, Amanda Carolina Paulino, Carvalho, Flávia Maria Souza, Ferro, Jesus Aparecido, de Souza, Robson Francisco, Orellano, Elena Graciela, Almeida, Nalvo Franco, Garcia, Camila Carrião Machado, Dandekar, Abhaya M., Chakraborty, Sandeep, Varani, Alessandro M., and Moreira, Leandro Marcio

Published
2025
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41. Cardiovascular and kidney diseases are positively associated with neuroinflammation and reduced brain-derived neurotrophic factor in patients with severe COVID-19

Author

Ferreira, Rafael R., Martins, Ronaldo B., Pires, Isabela, Marques, Bruno L., Costa, Karla C.M., Lirio, Pedro H.C., Scomparin, Davi S., Scarante, Franciele F., Batah, Sabrina S., Hallak, Jaime E.C., Crippa, Jose A., Rodrigues, Livia C.M., Tostes, Rita C., Fabro, Alexandre T., Arruda, Eurico, and Campos, Alline C.

Published
2024
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43. Neuroprotection induced by coumarins in central nervous system disease models

Author

de Souza, Suzana Braga, primary, Ferreira, Rafael Short, additional, dos Santos, Cleonice Creusa, additional, Castro e Silva, Juliana Helena, additional, Pereira, Erica Patrícia, additional, de Almeida, Monique Marylin Alves, additional, do Nascimento, Ravena Pereira, additional, de Sampaio Schitine, Clarissa, additional, de Oliveira, Juciele Valéria Ribeiro, additional, dos Santos, Balbino Lino, additional, de Faria Lopes, Giselle Pinto, additional, Ribeiro, Paulo Roberto, additional, dos Santos Souza, Cleide, additional, Butt, Arthur Morgan, additional, Dias Costa, Maria de Fatima, additional, da Silva, Victor Diogenes Amaral, additional, and Costa, Silvia Lima, additional

Published
2024
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44. List of contributors

Author

Abalo, Raquel, primary, Abdelghffar, Eman A., additional, Abdelkhalek, Yasmin M., additional, Acuña, Sabrina, additional, Adeyemo, Oluwatobi, additional, Ahlawat, Jyoti, additional, Ahmad, Aftab, additional, Ahsan, Khansa, additional, Ajeigbe, Olufunke Florence, additional, Alberto-Silva, Carlos, additional, Ali, Javed, additional, Almeida, Carlos Gabriel Moreira, additional, Almeida, Áurea Maria Alves Nunes, additional, Alves, Anna Beatriz Pereira Simões, additional, Anamelechi, Joy, additional, Andreatini, R., additional, Arbo, Bruno Dutra, additional, Arent, Camila O., additional, Ashraf, Hagar, additional, Aslim, Belma, additional, Atarase, Oyepeju, additional, Awasthi, Rajendra, additional, Baboota, Sanjula, additional, Bagatini, Margarete Dulce, additional, Bakrim, Saad, additional, Barajas-Saucedo, C.E., additional, Bassols, Anna, additional, Batagin-Neto, Augusto, additional, Benameur, Tarek, additional, Bermúdez-Guzmán, M.J., additional, Bernardi, María Alejandra, additional, Bertollo, Amanda Gollo, additional, Beulaja, M., additional, Bhattacharya, Pallab, additional, Binda, Nancy Scardua, additional, Bisagno, Verónica, additional, Boeira, Silvana Peterini, additional, Bonjorno, Andressa Francielli, additional, Borah, Anupom, additional, Borsini, Alessandra, additional, Botelho, Maria Eduarda M., additional, Boudreau, Luc H., additional, Bouyahya, Abdelhakim, additional, Brimson, James Michael, additional, Bujtor, Melissa, additional, Büsselberg, Dietrich, additional, Butt, Arthur Morgan, additional, Čagalj, Martina, additional, Candeias, Emanuel, additional, Cardoso, Sandra Morais, additional, Carlini, Celia R., additional, Carrazoni, Thiago, additional, Carreira, Rodrigo Barreto, additional, Carrera-González, María Pilar, additional, Castro e Silva, Juliana Helena, additional, Catherene, M. Livya, additional, Chamorro, María E., additional, Charlotte, Lechevallier, additional, Chaudhary, Antra, additional, Chiba, Diego Eidy, additional, Choonara, Yahya E., additional, Chukwudozie, Kingsley Ikechukwu, additional, Convertini, Paolo, additional, Correa, Florencia, additional, Costa, Silvia Lima, additional, Cox, Paul Alan, additional, Crispi, Stefania, additional, Cuciniello, Rossana, additional, urko-Cofek, Božena, additional, da Cunha, Israel Cordeiro Eller, additional, da Rocha Fernandes, Livia, additional, da Silva, Gilnei Bruno, additional, da Silva, Juliana Figueira, additional, da Silva, Victor Diogenes Amaral, additional, Dakka, Nadia, additional, Dal Belo, Cháriston André, additional, Datta, Aishika, additional, de Almeida, Monique Marylin Alves, additional, de Araújo, Fillipe Mendes, additional, de Bari, Lidia, additional, de Faria Lopes, Giselle Pinto, additional, de Gomes, Marcelo Gomes, additional, de Oliveira, Juciele Valéria Ribeiro, additional, de Oliveira, Marcos Roberto, additional, de Oliveira, Êndel Alves Gomes, additional, de Sampaio Schitine, Clarissa, additional, de Souza, Suzana Braga, additional, de Souza, Veronica Moreira, additional, Del Fabbro, Lucian, additional, Dhiman, Neerupma, additional, Di Meo, Francesco, additional, Dias Costa, Maria de Fatima, additional, do Nascimento, Ravena Pereira, additional, Dora, Cristiana Lima, additional, dos Santos, Balbino Lino, additional, dos Santos, Cleonice Creusa, additional, dos Santos, Jean Leandro, additional, dos Santos, Michele Goulart, additional, Dourado, Naiara Silva, additional, El Idrissi, Abdeslem, additional, El Menyiy, Naoual, additional, Eldahshan, Omayma A., additional, El-Nashar, Heba A.S., additional, El-Shazly, Mohamed, additional, Empadinhas, Nuno, additional, Esteban, S., additional, Esteves, A. Raquel, additional, Ezenandu, Emmanuel Obinna, additional, Ezeorba, Timothy Prince Chidike, additional, Ezeudoka, Brendan Chukwuemeka, additional, Fagiolino, Pietro, additional, Farombi, Ebenezer O., additional, Ferreira, Rafael Short, additional, Finnie, John W., additional, Furian, Ana Flávia, additional, Gaitán-Hinojosa, M.A., additional, Galván-Hernández, A.R., additional, García-Villalvazo, P.E., additional, Garg, Chahat, additional, Gazerani, Parisa, additional, Ghosh, Bijoyani, additional, Gomez, Marcus Vinícius, additional, González-Bulnes, Antonio, additional, Goyal, Lav, additional, Grewal, Amarjot Kaur, additional, Grubi Kezele, Tanja, additional, Guedes, Beatriz, additional, Guevara, Natalia, additional, Gutierrez, Antonia, additional, Habtemariam, Solomon, additional, Haghdoost-Yazdi, Hashem, additional, Hassoun, Abdo, additional, Heidari, Reza, additional, Hernández-González, Ignacio, additional, Horn, Ana Paula, additional, Hort, Mariana Appel, additional, Hritcu, Lucian, additional, Hyslop, Stephen, additional, Ibarra-Vega, R., additional, Ignácio, Zuleide Maria, additional, Ikeji, Cynthia Nwamaka, additional, Infantino, Vittoria, additional, James, Adewale Segun, additional, Jauquet, Mélissa, additional, Jimenez-García, M., additional, Jiménez-Vargas, J.M., additional, Junge, Stephanie, additional, Kalapos, Miklós Péter, additional, Kalra, Palak, additional, Kanazawa, L.K.S., additional, Kanekar, Shami, additional, Kargieman, Lucila, additional, Kaur, Jasleen, additional, Kaushik, Medha, additional, Kaushik, Pooja, additional, Khan, Farha Deeba, additional, Kharkwal, Harsha, additional, Komane, Patrick P., additional, Kubatka, Peter, additional, Kulkarni, G.T., additional, Kumar, Pradeep, additional, Kumar, Shobhit, additional, la Torre, Maria Ester, additional, Lahyaoui, Manal, additional, Lefebvre, Kathi A., additional, Leite, José Roberto S.A., additional, Lemarchand, Eloïse, additional, Lino-López, G.J., additional, Lopes, Flávia Garcia, additional, Lopes, Juliana Romano, additional, Lopez del Castillo, Ines, additional, López-Gómez, Laura, additional, Loureiro, Joana, additional, Luhach, Kanishk, additional, Magalhães, João Duarte, additional, Mahalakshmi, K., additional, Malar, Dicson Sheeja, additional, Maldonado, Cecilia, additional, Maltaneri, Romina E., additional, Manikandan, R., additional, Manosso, Luana M., additional, Marciniak, Stefan J., additional, Marín-Prida, Javier, additional, Marques, Magno da Silva, additional, Martínez-Martos, José Manuel, additional, Martyniuk, Christopher J., additional, Matosinhos, Rafaela Cunha, additional, Maurya, Shashank Kumar, additional, Melo-Marques, Inês, additional, Messina, Antonietta, additional, Messina, Giovanni, additional, Metcalf, James S., additional, Mihaiela, Cornea-Cipcigan, additional, Miralles, A., additional, Mishra, Rajeev, additional, Mishra, Rajnikant, additional, Monda, Marcellino, additional, Monda, Vincenzo, additional, Moranta, D., additional, Moreira, Daniel C., additional, Moreno-Gonzalez, Ines, additional, Morin, Pier, additional, Munawar, Nayla, additional, Naqvi, Saba, additional, Nedel, Cláudia Beatriz, additional, Nelissen, E., additional, Nesse, Alcira B., additional, Nigdelioglu Dolanbay, Serap, additional, Nunes-Costa, Daniela, additional, Ojo, Mercy Olubunmi, additional, Okeke, Emmanuel Sunday, additional, Okoye, Charles Obinwanne, additional, Okoye, Henrietta Ukamaka, additional, Oliveira, R.M.W., additional, Oliveira, Raquel Soares, additional, Ommati, Mohammad Mehdi, additional, Onaolapo, Adejoke Y., additional, Onaolapo, Olakunle J., additional, Panaro, Maria Antonietta, additional, Pappalardo, Ilaria, additional, Parimalanandhini, D., additional, Parvez, Suhel, additional, Patel, Mayank, additional, Pavan, Aline Renata, additional, Pedro, Lucas C., additional, Pentón-Rol, Giselle, additional, Pereira, Erica Patrícia, additional, Pereira-Santos, A. Raquel, additional, Pérez-Valle, Jorge, additional, Perissinotti, Paula P., additional, Phadke, Girija Gajanan, additional, Piermartiri, Tetsade C.B., additional, Pinto, João Victor Krüger, additional, Pizzolorusso, Ilaria, additional, Polito, Rita, additional, Porro, Chiara, additional, Portaro, Fernanda Calheta Vieira, additional, Prasad, K.V.S.R.G., additional, Prasanth, Mani Iyer, additional, Prickaerts, J., additional, Prokai, Laszlo, additional, Prokai-Tatrai, Katalin, additional, Quevedo, João, additional, Rabbani, Syed Arman, additional, Raj, Khadga, additional, Ramírez-Expósito, María Jesús, additional, Ramis, M.R., additional, Rana, Nikita, additional, Rathod, Nikheel Bhojraj, additional, Rawat, Kajal, additional, Retana-Marquez, Socorro, additional, Réus, Gislaine Z., additional, Ribeiro, Paulo Roberto, additional, Ríos-Bracamontes, E.F., additional, Rivero-Echeto, María Celeste S., additional, Rodica, Mrgoan, additional, Rodríguez-Leone, Nazarena, additional, Roussel, Benoit D., additional, Ruggiero, Melania, additional, Rupasree, P., additional, Saha, Lekha, additional, Salau, Veronica F., additional, Sangeetha, R., additional, Sardana, Satish, additional, Sarduy-Chávez, Rocío de la Caridad, additional, Sarmah, Deepaneeta, additional, Sarubbo, F., additional, Schimith, Lucia Emanueli, additional, Shahidul Islam, Md., additional, Sharika, Rajasekharan, additional, Sharma, Bhupesh, additional, Sharma, Poonam, additional, Sharma, Shrestha, additional, Shrivastava, Rahul, additional, Siddique, Yasir Hasan, additional, Silva, Marilyn H., additional, Šimat, Vida, additional, Singh, Gyanendra, additional, Singh, Neha, additional, Singh, Shamsher, additional, Singh, Thakur Gurjeet, additional, Singh, Varinder, additional, Sirin, Seda, additional, Soares, Janaina Ribeiro Pereira, additional, Souza, Cleide dos Santos, additional, Souza, Nara, additional, Srivastava, Vikas, additional, Su, Kuan-Pin, additional, Sujatha, D., additional, Sukach, Volodymyr, additional, Sunitha, S., additional, Tabassum, Heena, additional, Tasca, Carla I., additional, Tasker, R. Andrew, additional, Tasleem, Ammar, additional, Tejada, S., additional, Tencomnao, Tewin, additional, Torres, Rosimere Oliveira, additional, Triniac, Hortense, additional, Tripathi, Swapnil, additional, Trotta, Teresa, additional, Ugbaja, Regina Ngozi, additional, Ugbaja, Victory Chukwudalu, additional, Ugwor, Emmanuel Ifeanyichukwu, additional, Urbano, Francisco J., additional, Uzal, Francisco A., additional, Valdez-Velazquez, L.L., additional, Vaz, Gustavo Richter, additional, Vázquez, Marta, additional, Vegas-Gomez, Laura, additional, Victor, Mauricio Moraes, additional, Villalba, Sofia, additional, Villano, Ines, additional, Vinadé, Lucia, additional, Vital, M.A.B.F., additional, Vittori, Daniela C., additional, Vivien, Denis, additional, Yachou, Yassine, additional, Yeste, Natalia, additional, Zaman, Khadiza, additional, Zavalza-Gálvez, D.I., additional, Zeb, Alam, additional, and Zhai, Kevin, additional

Published
2024
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50. Knowledge-driven Answer Generation for Conversational Search

Author

Leite, Mariana, Ferreira, Rafael, Semedo, David, and Magalhães, João

Subjects
Computer Science - Computation and Language, Computer Science - Information Retrieval
Abstract

The conversational search paradigm introduces a step change over the traditional search paradigm by allowing users to interact with search agents in a multi-turn and natural fashion. The conversation flows naturally and is usually centered around a target field of knowledge. In this work, we propose a knowledge-driven answer generation approach for open-domain conversational search, where a conversation-wide entities' knowledge graph is used to bias search-answer generation. First, a conversation-specific knowledge graph is extracted from the top passages retrieved with a Transformer-based re-ranker. The entities knowledge-graph is then used to bias a search-answer generator Transformer towards information rich and concise answers. This conversation specific bias is computed by identifying the most relevant passages according to the most salient entities of that particular conversation. Experiments show that the proposed approach successfully exploits entities knowledge along the conversation, and outperforms a set of baselines on the search-answer generation task., Comment: Pre-print

Published
2021

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