Search results for "Co-Authorship"

Hits ?▲	Authors	Title	Venue	Year	Link
13	Mohammad Reza HabibAgahi, Mehrdad Agha Mohammad Ali Kermani, Mehrdad Maghsoudi	On the Co-authorship network analysis in the Process Mining research Community: A social network analysis perspective.	Expert Syst. Appl.	2022	DBLP DOI BibTeX RDF
13	Marcella Andrade da Rocha, Philippi Sedir Grilo de Morais, Daniele Montenegro da Silva Barros, João Paulo Queiroz dos Santos, Sara Dias-Trindade, Ricardo Alexsandro de Medeiros Valentim	A text as unique as a fingerprint: Text analysis and authorship recognition in a Virtual Learning Environment of the Unified Health System in Brazil.	Expert Syst. Appl.	2022	DBLP DOI BibTeX RDF
13	Raheem Sarwar, Saeed-Ul Hassan	UrduAI: Writeprints for Urdu Authorship Identification.	ACM Trans. Asian Low Resour. Lang. Inf. Process.	2022	DBLP DOI BibTeX RDF
13	Zulqarnain Nazir, Khurram Shahzad 0002, Muhammad Kamran Malik, Waheed Anwar, Imran Sarwar Bajwa, Khawar Mehmood	Authorship Attribution for a Resource Poor Language - Urdu.	ACM Trans. Asian Low Resour. Lang. Inf. Process.	2022	DBLP DOI BibTeX RDF
13	Gerardo Sierra, Tonatiuh Hernández-García, Helena Gómez-Adorno, Gemma Bel-Enguix	A case study in authorship attribution: The Mondrigo.	J. Intell. Fuzzy Syst.	2022	DBLP DOI BibTeX RDF
13	Carolina Martín del Campo Rodríguez, Grigori Sidorov, Ildar Z. Batyrshin	Unsupervised authorship attribution using feature selection and weighted cosine similarity.	J. Intell. Fuzzy Syst.	2022	DBLP DOI BibTeX RDF
13	Silvia Corbara, Alejandro Moreo, Fabrizio Sebastiani 0001, Mirko Tavoni	MedLatinEpi and MedLatinLit: Two Datasets for the Computational Authorship Analysis of Medieval Latin Texts.	ACM Journal on Computing and Cultural Heritage	2022	DBLP DOI BibTeX RDF
13	Anna V. Kurtukova, Aleksandr Romanov 0002, Alexander A. Shelupanov, Anastasia Mikhailovna Fedotova	Complex Cases of Source Code Authorship Identification Using a Hybrid Deep Neural Network.	Future Internet	2022	DBLP DOI BibTeX RDF
13	Vincenza Carchiolo, Marco Grassia, Michele Malgeri, Giuseppe Mangioni	Co-Authorship Networks Analysis to Discover Collaboration Patterns among Italian Researchers.	Future Internet	2022	DBLP DOI BibTeX RDF
13	Anastasia Mikhailovna Fedotova, Aleksandr Romanov 0002, Anna V. Kurtukova, Alexander A. Shelupanov	Authorship Attribution of Social Media and Literary Russian-Language Texts Using Machine Learning Methods and Feature Selection.	Future Internet	2022	DBLP DOI BibTeX RDF
13	Fereshteh Jafariakinabad, Kien A. Hua	A Self-Supervised Representation Learning of Sentence Structure for Authorship Attribution.	ACM Trans. Knowl. Discov. Data	2022	DBLP DOI BibTeX RDF
13	Andreas C. Neocleous, Giorgos Kataliakos, Antis Loizides	Text Mining in 19th-Century Essays for Investigating a Possible Collaborative Authorship Problem: John Stuart Mill and Harriet Taylor Mill.	IEEE Access	2022	DBLP DOI BibTeX RDF
13	Chanchal Suman, Ayush Raj, Sriparna Saha 0001, Pushpak Bhattacharyya	Authorship Attribution of Microtext Using Capsule Networks.	IEEE Trans. Comput. Soc. Syst.	2022	DBLP DOI BibTeX RDF
13	Hartmut Ilsemann	The authorship of Wily Beguiled.	Digit. Scholarsh. Humanit.	2022	DBLP DOI BibTeX RDF
13	Aleksej Tikhonov, Klaus Müller	Scribe versus authorship attribution and clustering in historic Czech manuscripts: a case study with visual and linguistic features.	Digit. Scholarsh. Humanit.	2022	DBLP DOI BibTeX RDF
13	Brian Vickers	Arden of Faversham, the authorship problem: Shakespeare, Watson, or Kyd?	Digit. Scholarsh. Humanit.	2022	DBLP DOI BibTeX RDF
13	Shunichi Ishihara	Mahalanobis distance with an adapted within-author covariance matrix: An authorship verification experiment.	Digit. Scholarsh. Humanit.	2022	DBLP DOI BibTeX RDF
13	Leonardo Ranaldi, Federico Ranaldi, Francesca Fallucchi, Fabio Massimo Zanzotto	Shedding Light on the Dark Web: Authorship Attribution in Radical Forums.	Inf.	2022	DBLP DOI BibTeX RDF
13	Andrea Mannocci, Ornella Irrera, Paolo Manghi	Will open science change authorship for good? Towards a quantitative analysis.	CoRR	2022	DBLP DOI BibTeX RDF
13	Keenan Jones, Jason R. C. Nurse, Shujun Li	Are You Robert or RoBERTa? Deceiving Online Authorship Attribution Models Using Neural Text Generators.	CoRR	2022	DBLP DOI BibTeX RDF
13	Bo Ai, Yuchen Wang, Yugin Tan, Samson Tan	Whodunit? Learning to Contrast for Authorship Attribution.	CoRR	2022	DBLP DOI BibTeX RDF
13	Forough Farazmanesh, Fateme Foroutan, Amir Jalaly Bidgoly	Compromised account detection using authorship verification: a novel approach.	CoRR	2022	DBLP DOI BibTeX RDF
13	Florian Lehmann, Niklas Markert, Hai Dang, Daniel Buschek	Suggestion Lists vs. Continuous Generation: Interaction Design for Writing with Generative Models on Mobile Devices Affect Text Length, Wording and Perceived Authorship.	CoRR	2022	DBLP DOI BibTeX RDF
13	Zhen Li, Guenevere Chen, Chen Chen 0001, Yayi Zou, Shouhuai Xu	RoPGen: Towards Robust Code Authorship Attribution via Automatic Coding Style Transformation.	CoRR	2022	DBLP BibTeX RDF
13	Adaku Uchendu, Thai Le, Dongwon Lee 0001	Attribution and Obfuscation of Neural Text Authorship: A Data Mining Perspective.	CoRR	2022	DBLP DOI BibTeX RDF
13	Philipp Sauer, Janek Bevendorff, Lukas Gienapp, Wolfgang Kircheis, Erik Körner, Benno Stein 0001, Martin Potthast	SMAuC - The Scientific Multi-Authorship Corpus.	CoRR	2022	DBLP DOI BibTeX RDF
13	Zeinab S. Jalali, Josh Introne, Sucheta Soundarajan	Social Stratification in Networks: Insights from Co-Authorship Networks.	CoRR	2022	DBLP DOI BibTeX RDF
13	Leonard Bauersfeld, Angel Romero, Manasi Muglikar, Davide Scaramuzza 0001	Cracking Double-Blind Review: Authorship Attribution with Deep Learning.	CoRR	2022	DBLP DOI BibTeX RDF
13	Wanyue Zhai, Jonathan Rusert, Zubair Shafiq, Padmini Srinivasan	A Girl Has A Name, And It's ... Adversarial Authorship Attribution for Deobfuscation.	CoRR	2022	DBLP DOI BibTeX RDF
13	Pablo Dorta-González, María-Isabel Dorta-González	Collaboration Effect by Co-Authorship on Academic Citation and Social Attention of Research.	CoRR	2022	DBLP DOI BibTeX RDF
13	Pengsheng Ji, Jiashun Jin, Zheng Tracy Ke, Wanshan Li	Co-citation and Co-authorship Networks of Statisticians.	CoRR	2022	DBLP DOI BibTeX RDF
13	Javier Huertas-Tato, Álvaro Huertas-García, Alejandro Martín, David Camacho	PART: Pre-trained Authorship Representation Transformer.	CoRR	2022	DBLP DOI BibTeX RDF
13	Teddy Lazebnik, Stephan Beck 0002, Labib Shami	Academic Co-authorship is a Risky Game.	CoRR	2022	DBLP DOI BibTeX RDF
13	Maciej Eder	Boosting word frequencies in authorship attribution.	CoRR	2022	DBLP DOI BibTeX RDF
13	Parvez Mahbub, Naz Zarreen Oishie, S. M. Rafizul Haque	Authorship Identification of Source Code Segments Written by Multiple Authors Using Stacking Ensemble Method.	CoRR	2022	DBLP DOI BibTeX RDF
13	Jagna Nieuwazny, Karol Nowakowski, Michal Ptaszynski, Fumito Masui	Can You Fool AI by Doing a 180? - A Case Study on Authorship Analysis of Texts by Arata Osada.	CoRR	2022	DBLP DOI BibTeX RDF
13	Andrea Mannocci, Ornella Irrera, Paolo Manghi	Open Science and Authorship of Supplementary Material. Evidence from a Research Community.	CoRR	2022	DBLP DOI BibTeX RDF
13	Bastian Schäfermeier, Johannes Hirth, Tom Hanika	Research Topic Flows in Co-Authorship Networks.	CoRR	2022	DBLP DOI BibTeX RDF
13	Andrei Manolache, Florin Brad, Antonio Barbalau, Radu Tudor Ionescu, Marius Popescu	VeriDark: A Large-Scale Benchmark for Authorship Verification on the Dark Web.	CoRR	2022	DBLP DOI BibTeX RDF
13	Sanda Maria Avram, Mihai Oltean	A comparison of several AI techniques for authorship attribution on Romanian texts.	CoRR	2022	DBLP DOI BibTeX RDF
13	Ajay Patel, Nicholas Andrews, Chris Callison-Burch	Low-Resource Authorship Style Transfer with In-Context Learning.	CoRR	2022	DBLP DOI BibTeX RDF
13	Lenka Jungmannová, Petr Plechác	Unsigned Play by Milan Kundera? An Authorship Attribution Study.	CoRR	2022	DBLP DOI BibTeX RDF
13	Ziyao Wang, Thai Le, Dongwon Lee 0001	UPTON: Unattributable Authorship Text via Data Poisoning.	CoRR	2022	DBLP DOI BibTeX RDF
13	Qige Song, Yongzheng Zhang 0002, Linshu Ouyang, Yige Chen	BinMLM: Binary Authorship Verification with Flow-aware Mixture-of-Shared Language Model.	CoRR	2022	DBLP DOI BibTeX RDF
13	Sumit Gupta, Swarupa Das, Jyotish Ranjan Mallik	Machine learning-based authorship attribution using token n-grams and other time tested features.	Int. J. Hybrid Intell. Syst.	2022	DBLP DOI BibTeX RDF
13	Hsuan-I Liu, Mu-Hsuan Huang	Research contribution pattern analysis of multinational authorship papers.	Scientometrics	2022	DBLP DOI BibTeX RDF
13	Klaus Wohlrabe, Lutz Bornmann	Alphabetized co-authorship in economics reconsidered.	Scientometrics	2022	DBLP DOI BibTeX RDF
13	Dennis Essers, Francesco Grigoli, Evgenia Pugacheva	Network effects and research collaborations: evidence from IMF Working Paper co-authorship.	Scientometrics	2022	DBLP DOI BibTeX RDF
13	Toshiyuki Hasumi, Mei-Shiu Chiu	Online mathematics education as bio-eco-techno process: bibliometric analysis using co-authorship and bibliographic coupling.	Scientometrics	2022	DBLP DOI BibTeX RDF
13	Sidra Razzaq, Ahmad Kamran Malik, Basit Raza, Hasan Ali Khattak, Giomar W. Moscoso Zegarra, Yvan Díaz Zelada	Research Collaboration Influence Analysis Using Dynamic Co-authorship and Citation Networks.	Int. J. Interact. Multim. Artif. Intell.	2022	DBLP DOI BibTeX RDF
13	Marcelo Fraile-Narváez, Ismael Sagredo-Olivenza, Nadia McGowan	Painting Authorship and Forgery Detection Challenges with AI Image Generation Algorithms: Rembrandt and 17th Century Dutch Painters as a Case Study.	Int. J. Interact. Multim. Artif. Intell.	2022	DBLP DOI BibTeX RDF
13	Rajesh Shardanand Prasad, Midhun Chakkaravarthy	State of the Art in Authorship Attribution With Impact Analysis of Stylometric Features on Style Breach Prediction.	J. Cases Inf. Technol.	2022	DBLP DOI BibTeX RDF
13	Jin Gao, Julianne Nyhan, Oliver Duke-Williams, Simon Mahony	Gender influences in Digital Humanities co-authorship networks.	J. Documentation	2022	DBLP DOI BibTeX RDF
13	Hyerim Cho, Chris Hubbles, Heather Moulaison Sandy	Individuals responsible for video games: an exploration of cataloging practice, user need and authorship theory.	J. Documentation	2022	DBLP DOI BibTeX RDF
13	Phillip Nelson, Marina G. Petrova	Research assistants: Scientific credit and recognized authorship.	Learn. Publ.	2022	DBLP DOI BibTeX RDF
13	Salvatore G. Chiarella, Giulia Torromino, Dionigi M. Gagliardi, Dario Rossi 0002, Fabio Babiloni, Giulia Cartocci	Investigating the negative bias towards artificial intelligence: Effects of prior assignment of AI-authorship on the aesthetic appreciation of abstract paintings.	Comput. Hum. Behav.	2022	DBLP DOI BibTeX RDF
13	Yue Yu, Wei Liu, Ying Feng	A Quantitative Study on Dream of the Red Chamber: Word-Length Distribution and Authorship Attribution.	Complex.	2022	DBLP DOI BibTeX RDF
13	Mati Ullah, Abdul Shahid, Irfan ud Din, Muhammad Roman, Muhammad Assam, Muhammad Fayaz, Yazeed Ghadi, Hanan Aljuaid	Analyzing Interdisciplinary Research Using Co-Authorship Networks.	Complex.	2022	DBLP DOI BibTeX RDF
13	Ghazal Kalhor, Amin Asadi Sarijalou, Niloofar Sharifi Sadr, Behnam Bahrak	A new insight to the analysis of co-authorship in Google Scholar.	Appl. Netw. Sci.	2022	DBLP DOI BibTeX RDF
13	Yipu Zheng, Zhuqian Zhou, Paulo Blikstein	Towards an Inclusive and Socially Committed Community in Artificial Intelligence in Education: A Social Network Analysis of the Evolution of Authorship and Research Topics over 8 Years and 2509 Papers.	AIED (1)	2022	DBLP DOI BibTeX RDF
13	Bo Ai, Yuchen Wang, Yugin Tan, Samson Tan	Whodunit? Learning to Contrast for Authorship Attribution.	AACL/IJCNLP (1)	2022	DBLP BibTeX RDF
13	Rajvardhan Oak	Poster - Towards Authorship Obfuscation with Language Models.	CCS	2022	DBLP DOI BibTeX RDF
13	Christian Oliva, Santiago Palmero Muñoz, Luis Fernando Lago-Fernández, David Arroyo	Improving LSTMs' under-performance in Authorship Attribution for short texts.	EICC	2022	DBLP DOI BibTeX RDF
13	Abhishek Chopra, Nikhill Vombatkere, Arash Habibi Lashkari	AuthAttLyzer: A Robust defensive distillation-based Authorship Attribution framework.	ICCNS	2022	DBLP DOI BibTeX RDF
13	Sadaira Packer, Cheryl D. Seals, Gerry V. Dozier	Towards the Improvement of UI/UX of a Human-AI Adversarial Authorship System.	HCI (32)	2022	DBLP DOI BibTeX RDF
13	Shimi Zhou, Eleanor T. Loiacono, Sridhar P. Nerur, Adriane B. Randolph, Elizabeth Lingo, Lakshmi S. Iyer, Michelle Carter 0001	Authorship, Collaboration, and Influence of Women IS Scholars: Using Social Network Analysis.	AMCIS	2022	DBLP BibTeX RDF
13	Antonio Theophilo, Anderson Rocha 0001	Authorship Attribution of Small Messages Through Language Models.	WIFS	2022	DBLP DOI BibTeX RDF
13	Silvia Corbara, Berta Chulvi Ferriols, Paolo Rosso, Alejandro Moreo	Investigating Topic-Agnostic Features for Authorship Tasks in Spanish Political Speeches.	NLDB	2022	DBLP DOI BibTeX RDF
13	PengNan Hao, Zhen Li 0027, Cui Liu, Yu Wen, Fanming Liu	Towards Improving Multiple Authorship Attribution of Source Code.	QRS	2022	DBLP DOI BibTeX RDF
13	Antonio Theophilo, Rafael Padilha, Fernanda A. Andaló, Anderson Rocha 0001	Explainable Artificial Intelligence for Authorship Attribution on Social Media.	ICASSP	2022	DBLP DOI BibTeX RDF
13	Maciej Eder	Boosting Word Frequencies in Authorship Attribution.	CHR	2022	DBLP BibTeX RDF
13	Leonardo Grotti, Mona Allaert, Patrick Quick	Good Omens: A Collaborative Authorship Study.	CHR	2022	DBLP BibTeX RDF
13	Chandler Holland, Navid Khoshavi, Luis Gabriel Jaimes	Code authorship identification via deep graph CNNs.	ACM Southeast Regional Conference	2022	DBLP DOI BibTeX RDF
13	Qige Song, Yongzheng Zhang 0002, Linshu Ouyang, Yige Chen	BinMLM: Binary Authorship Verification with Flow-aware Mixture-of-Shared Language Model.	SANER	2022	DBLP DOI BibTeX RDF
13	Chanchal Suman, Sriparna Saha 0001, Pushpak Bhattacharyya	Authorship Attribution of Scientific Abstracts.	ICPR	2022	DBLP DOI BibTeX RDF
13	Andrea Mannocci, Ornella Irrera, Paolo Manghi	Will Open Science Change Authorship for Good? Towards a Quantitative Analysis.	IRCDL	2022	DBLP BibTeX RDF
13	Florian Lehmann, Niklas Markert, Hai Dang, Daniel Buschek	Suggestion Lists vs. Continuous Generation: Interaction Design for Writing with Generative Models on Mobile Devices Affect Text Length, Wording and Perceived Authorship.	MuC	2022	DBLP DOI BibTeX RDF
13	Daniel Enriquez, Gage Christensen, Hayden Donovan, Jared Lam, Noah Wong, Sergiu Dascalu, David Feil-Seifer, Emily M. Hand	Authorship Verification for Hired Plagiarism Detection.	ACIT	2022	DBLP DOI BibTeX RDF
13	Khoa Dang Dong, Dang Tuan Nguyen	Vietnamese Text's Writing Styles Based Authorship Identification Model.	FDSE (CCIS Volume)	2022	DBLP DOI BibTeX RDF
13	Maria Komova, Alina Petrushka	The synergistic paradigm for profiling authorship of blogosphere content by profession.	CMiGIN	2022	DBLP BibTeX RDF
13	Mihaiela Lupea, Anamaria Briciu, István Gergely Czibula, Gabriela Czibula	SoftId: An autoencoder-based one-class classification model for software authorship identification.	KES	2022	DBLP DOI BibTeX RDF
13	Jorge Alfonso Martinez Galicia, Daniel Embarcadero Ruiz, Alejandro Ríos Orduña, Helena Gómez-Adorno	Graph-Based Siamese Network for Authorship Verification.	CLEF (Working Notes)	2022	DBLP BibTeX RDF
13	Yihui Ye, Han Y, Zeyang Peng, Mingjie Huang, Leilei Kong, Zhongyuan Han	Authorship Verification Using Convolutional Neural Network.	CLEF (Working Notes)	2022	DBLP BibTeX RDF
13	Maryam Najafi, Ehsan Tavan	Text-to-Text Transformer in Authorship Verification Via Stylistic and Semantical Analysis.	CLEF (Working Notes)	2022	DBLP BibTeX RDF
13	Efstathios Stamatatos, Mike Kestemont, Krzysztof Kredens, Piotr Pezik, Annina Heini, Janek Bevendorff, Benno Stein 0001, Martin Potthast	Overview of the Authorship Verification Task at PAN 2022.	CLEF (Working Notes)	2022	DBLP BibTeX RDF
13	Silvia Corbara, Berta Chulvi, Paolo Rosso, Alejandro Moreo	Rhythmic and Psycholinguistic Features for Authorship Tasks in the Spanish Parliament: Evaluation and Analysis.	CLEF	2022	DBLP DOI BibTeX RDF
13	Stefanos Konstantinou, Jinqiao Li, Angelos Zinonos	Different Encoding Approaches for Authorship Verification.	CLEF (Working Notes)	2022	DBLP BibTeX RDF
13	Melesio Crespo-Sanchez, Helena Gómez-Adorno, Ivan López-Arévalo, Edwin Aldana-Bobadilla, Karla Salas-Jimenez, Jorge Cortes-Lopez	A content spectral-based analysis for authorship verification.	CLEF (Working Notes)	2022	DBLP BibTeX RDF
13	Mingjie Huang, Leilei Kong, Zeyang Peng, Yihui Ye, Zengyao Li, Xinyin Jiang, Zhongyuan Han	Authorship verification Based On Fully Interacted Text Segments.	CLEF (Working Notes)	2022	DBLP BibTeX RDF
13	Janek Bevendorff, Berta Chulvi, Elisabetta Fersini, Annina Heini, Mike Kestemont, Krzysztof Kredens, Maximilian Mayerl, Reynier Ortega-Bueno, Piotr Pezik, Martin Potthast, Francisco Rangel, Paolo Rosso, Efstathios Stamatatos, Benno Stein 0001, Matti Wiegmann, Magdalena Wolska, Eva Zangerle	Overview of PAN 2022: Authorship Verification, Profiling Irony and Stereotype Spreaders, and Style Change Detection.	CLEF	2022	DBLP DOI BibTeX RDF
13	Mohamed Amine Boukhaled	A Machine Learning based Study on Classical Arabic Authorship Identification.	ICAART (1)	2022	DBLP DOI BibTeX RDF
13	Janek Bevendorff, Berta Chulvi, Elisabetta Fersini, Annina Heini, Mike Kestemont, Krzysztof Kredens, Maximilian Mayerl, Reyner Ortega-Bueno, Piotr Pezik, Martin Potthast, Francisco Rangel, Paolo Rosso, Efstathios Stamatatos, Benno Stein 0001, Matti Wiegmann, Magdalena Wolska, Eva Zangerle	Overview of PAN 2022: Authorship Verification, Profiling Irony and Stereotype Spreaders, Style Change Detection, and Trigger Detection - Extended Abstract.	ECIR (2)	2022	DBLP DOI BibTeX RDF
13	Santiago Palmero Muñoz, Christian Oliva, Luis Fernando Lago-Fernández, David Arroyo	Advancing the Use of Information Compression Distances in Authorship Attribution.	MISDOOM	2022	DBLP DOI BibTeX RDF
13	András Kicsi, Péter Sánta, Dániel Horváth, Norbert Kohegyi, Viktor Szvoreny, Veronika Vincze, Eszter Fozo, László Vidács	Computer-Aided Forensic Authorship Identification in Criminology.	ICCSA (Workshops 5)	2022	DBLP DOI BibTeX RDF
13	Jitkapat Sawatphol, Nonthakit Chaiwong, Can Udomcharoenchaikit, Sarana Nutanong	Topic-Regularized Authorship Representation Learning.	EMNLP	2022	DBLP DOI BibTeX RDF
13	Florin Brad, Andrei Manolache, Elena Burceanu, Antonio Barbalau, Radu Tudor Ionescu, Marius Popescu	Rethinking the Authorship Verification Experimental Setups.	EMNLP	2022	DBLP DOI BibTeX RDF
13	Malik H. Altakrori, Thomas Scialom, Benjamin C. M. Fung, Jackie Chi Kit Cheung	A Multifaceted Framework to Evaluate Evasion, Content Preservation, and Misattribution in Authorship Obfuscation Techniques.	EMNLP	2022	DBLP DOI BibTeX RDF
13	Andrei Manolache, Florin Brad, Antonio Barbalau, Radu Tudor Ionescu, Marius Popescu	VeriDark: A Large-Scale Benchmark for Authorship Verification on the Dark Web.	NeurIPS	2022	DBLP BibTeX RDF
13	Javier Huertas-Tato, Alejandro Martín, Álvaro Huertas-García, David Camacho	Generating Authorship Embeddings with Transformers.	IJCNN	2022	DBLP DOI BibTeX RDF
13	Viktor Shynkarenko, Inna Demidovich	Natural Language Texts Authorship Establishing Based on the Sentences Structure.	COLINS	2022	DBLP BibTeX RDF