Search results for "Emotions"

Hits ?▲	Authors	Title	Venue	Year	Link	Author keywords
25	Klara Nelson	Exploring Emotions during ERP Adoption: A Stakeholder Analysis.	HICSS	2005	DBLP DOI BibTeX RDF
25	Adina Florea, Eugenia Kalisz	Embedding Emotions in an Artificial Tutor.	SYNASC	2005	DBLP DOI BibTeX RDF
25	Karthi Selvarajah, Debbie Richards 0001	The use of emotions to create believable agents in a virtual environment.	AAMAS	2005	DBLP DOI BibTeX RDF	emotion-based agent architecture, ostracism, virtual reality, psychology
25	David Oziem, Lisa Gralewski, Neill W. Campbell, Colin J. Dalton, David P. Gibson, Barry T. Thomas	Synthesising Facial Emotions.	TPCG	2004	DBLP DOI BibTeX RDF
25	Patrick Gebhard, Martin Klesen, Thomas Rist	Coloring Multi-character Conversations through the Expression of Emotions.	ADS	2004	DBLP DOI BibTeX RDF
25	Matti Airas, Paavo Alku	Emotions in Short Vowel Segments: Effects of the Glottal Flow as Reflected by the Normalized Amplitude Quotient.	ADS	2004	DBLP DOI BibTeX RDF
25	Antonio Chella, Ignazio Infantino, Irene Macaluso	Conceptual spaces and robotic emotions.	SMC (1)	2004	DBLP DOI BibTeX RDF
25	Alicja Wieczorkowska	Towards Extracting Emotions from Music.	IMTCI	2004	DBLP DOI BibTeX RDF
25	Rui Prada, Marco Vala, Ana Paiva 0001, Kristina Höök, Adrian Bullock	FantasyA - The Duel of Emotions.	IVA	2003	DBLP DOI BibTeX RDF
25	Ana Paiva 0001, Ricardo Chaves, Moisés Piedade, Adrian Bullock, Gerd Andersson, Kristina Höök	SenToy: a tangible interface to control the emotions of a synthetic character.	AAMAS	2003	DBLP DOI BibTeX RDF
23	Beatriz López-Mencía, David Díaz Pardo de Vera, Álvaro Hernández Trapote, Luis A. Hernández Gómez, José Relaño-Gil	A collaborative approach to the design and evaluation of an interactive learning tool for children with special educational needs.	IDC	2010	DBLP DOI BibTeX RDF	evaluation scheme, reinforcement learning, emotions, embodied conversational agents, educational software
23	Zacharias Lekkas, Nikos Tsianos, Panagiotis Germanakos, Constantinos Mourlas, George Samaras	Implementing Affect Parameters in Personalized Web-Based Design.	HCI (3)	2009	DBLP DOI BibTeX RDF	disposition, learning, personalization, emotions, decision-making, affect, regulation, mood
23	Ana Luiza Dias, Júnia Coutinho Anacleto Silva, Luciana Martha Silveira, Rosângela Dellosso Penteado	Formalizing motivational patterns based on colors and their cultural meanings for developing web applications.	SAC	2009	DBLP DOI BibTeX RDF	motivational patterns, emotions, colors, collaborative work, common sense, web project
23	Louise Nørgaard Glud, Anders Albrechtslund, Henrik Harder	The persuasive qualities of maps.	PERSUASIVE	2009	DBLP DOI BibTeX RDF	persuasive platforms, research by design, geographic information systems (GIS), emotions, map, GPS, SMS, actor-network theory, zoo
23	Omar Mubin, Suleman Shahid, Christoph Bartneck, Emiel Krahmer, Marc Swerts, Loe M. G. Feijs	Using language tests and emotional expressions to determine the learnability of artificial languages.	CHI Extended Abstracts	2009	DBLP DOI BibTeX RDF	artificial languages, language learnability, human robot interaction, emotions, speech interaction
23	Suleman Shahid, Emiel Krahmer, Marc Swerts, Willem A. Melder, Mark A. Neerincx	Exploring social and temporal dimensions of emotion induction using an adaptive affective mirror.	CHI Extended Abstracts	2009	DBLP DOI BibTeX RDF	mood induction, positive emotions, presence effect, affective computing, adaptive interfaces, co-presence
23	Sylvie Noël, Sarah J. Dumoulin, Gitte Lindgaard	Interpreting Human and Avatar Facial Expressions.	INTERACT (1)	2009	DBLP DOI BibTeX RDF	collaborative virtual world, virtual reality, Emotions, avatars, facial expression
23	Antje Lichtenstein, Astrid Oehme, Stefan Kupschick, Thomas Jürgensohn	Comparing Two Emotion Models for Deriving Affective States from Physiological Data.	Affect and Emotion in Human-Computer Interaction	2008	DBLP DOI BibTeX RDF	dimensional model of affect, basic emotions, ambient intelligence, psychophysiology, Emotion classification
23	Talya Porat, Noam Tractinsky	Affect as a Mediator between Web-Store Design and Consumers' Attitudes toward the Store.	Affect and Emotion in Human-Computer Interaction	2008	DBLP DOI BibTeX RDF	Web-store atmosphere, design, usability, Emotions, aesthetics
23	Nicolae Jascanu, Veronica Jascanu, Severin Bumbaru	Toward Emotional E-Commerce: The Customer Agent.	KES (1)	2008	DBLP DOI BibTeX RDF	e-commerce, emotions, affective computing
23	Joana Lessa	Representation and communication of affective states: design of a multimedia experimental communication interface.	SIGDOC	2008	DBLP DOI BibTeX RDF	technological mediated communication, multimedia, emotions, communication design, expression of emotion
23	Christian Peter, Russell Beale, Elizabeth A. Crane, Lesley Axelrod	Emotion in HCI.	BCS HCI (2)	2007	DBLP DOI BibTeX RDF	human-computer interaction, design, emotions, applications, affective computing, theories, emotion recognition, sensing
23	Alena Neviarouskaya, Helmut Prendinger, Mitsuru Ishizuka	Recognition of Affect Conveyed by Text Messaging in Online Communication.	HCI (15)	2007	DBLP DOI BibTeX RDF	emotions, online communication, Affective computing, avatar, text analysis, affective user interface, language parsing and understanding
23	Sébastien Duval, Hiromichi Hashizume	First Design of a Ubiquitous System for Affective Bonding and Support with Family and Friends.	HCI (15)	2007	DBLP DOI BibTeX RDF	HCI, Emotions, Cultures, Wearable, Family, Emotional design, Friends, Ubiquity
23	Alena Neviarouskaya, Helmut Prendinger, Mitsuru Ishizuka	Analysis of affect expressed through the evolving language of online communication.	IUI	2007	DBLP DOI BibTeX RDF	emotions, online communication, affective computing, avatar, affective user interface
23	Marije Kanis, Willem-Paul Brinkman	What do people like?: the design of a mobile tool to harness and share positive thoughts.	ECCE	2007	DBLP DOI BibTeX RDF	mobile mediated communication, positive emotions, positive psychology, social sharing, mobile technology
23	Peter Schneider, Axel Mattenklott	Emotion Eliciting Events in the Workplace: An Intercultural Comparison.	IWIC	2007	DBLP DOI BibTeX RDF	Daily hassles, German and Japanese employees, emotions, attributions, job satisfaction
23	Emmanuel G. Blanchard, Claude Frasson	An Autonomy-Oriented System Design for Enhancement of Learner?s Motivation in E-learning.	Intelligent Tutoring Systems	2004	DBLP DOI BibTeX RDF	Achievement Motivation, e-Learning, Emotions, Intelligent Tutoring Systems, Role-Playing, Pedagogical Agents, Open-Environment, Agents Collaboration, Constructivist Learning
23	Shaundra Bryant Daily, Rosalind W. Picard	INNER-active journal.	SRMC	2004	DBLP DOI BibTeX RDF	expressive writing, story construction, emotions, physiological signals
23	Fatma Nasoz, Onur Ozyer, Christine L. Lisetti, Neal Finkelstein	Multimodal affective driver interfaces for future cars.	ACM Multimedia	2002	DBLP DOI BibTeX RDF	drivers' safety, multi-modal affective intelligent interfaces, emotions, wearable computers
23	Wataru Tsukahara, Nigel Ward	Responding to subtle, fleeting changes in the user's internal state.	CHI	2001	DBLP DOI BibTeX RDF	ephemeral emotions, real-time, feedback, social interaction, responsive, prosody, tutoring, Japanese, spoken dialog, non-verbal, acknowledgements
23	Cheng-Te Li, Hung-Che Lai, Chien-Tung Ho, Chien-Lin Tseng, Shou-De Lin	Pusic: musicalize microblog messages for summarization and exploration.	WWW	2010	DBLP DOI BibTeX RDF	emotion, music, summarization, exploration, micro-blogging
23	Helena M. Mentis, Madhu C. Reddy, Mary Beth Rosson	Invisible emotion: information and interaction in an emergency room.	CSCW	2010	DBLP DOI BibTeX RDF	er, documentation, healthcare, articulation work, emotion expressions
23	Rui Craveirinha, Licinio Roque	Looking for the heart of interactive media: reflections on video games' emotional expression.	Fun and Games	2010	DBLP DOI BibTeX RDF	emotion, game design
23	Rachel McDonnell, Sophie Jörg, Joanna McHugh, Fiona N. Newell, Carol O'Sullivan	Investigating the role of body shape on the perception of emotion.	ACM Trans. Appl. Percept.	2009	DBLP DOI BibTeX RDF	Perception, motion capture, graphics
23	Sidney K. D'Mello, Scotty D. Craig, Karl Fike, Arthur C. Graesser	Responding to Learners' Cognitive-Affective States with Supportive and Shakeup Dialogues.	HCI (3)	2009	DBLP DOI BibTeX RDF	affect-sensitive AutoTutor, emotion, ITS, affect
23	Fatma Nasoz, Mehmet Bayburt	Affectively Intelligent User Interfaces for Enhanced E-Learning Applications.	HCI (10)	2009	DBLP DOI BibTeX RDF
23	Yueh-Hung Lin, Chia-Yang Liu, Hung-Wei Lee, Shwu-Lih Huang, Tsai-Yen Li	Evaluating Emotive Character Animations Created with Procedural Animation.	IVA	2009	DBLP DOI BibTeX RDF
23	Magalie Ochs, Helmut Prendinger	Emotional gaming: win by emotion expression.	Advances in Computer Entertainment Technology	2009	DBLP DOI BibTeX RDF
23	Léon J. M. Rothkrantz, Pascal Wiggers	Multimodal Labeling.	TSD	2009	DBLP DOI BibTeX RDF
23	Eva Hudlicka	Affective game engines: motivation and requirements.	FDG	2009	DBLP DOI BibTeX RDF	affective game engines, affective gaming, emotion, affective computing, game design, affective modeling
23	Amalia Ortiz, David Oyarzun, Maria del Puy Carretero	ELEIN: E-Learning with 3D Interactive Emotional Agents.	Edutainment	2009	DBLP DOI BibTeX RDF	appraisal theory of emotion, Affective computing, facial animation, virtual characters
23	Jorge Teixeira, Vasco Vinhas, Eugénio C. Oliveira, Luís Paulo Reis	General-Purpose Emotion Assessment Testbed Based on Biometric Information.	New Directions in Intelligent Interactive Multimedia	2008	DBLP DOI BibTeX RDF
23	Magalie Ochs, Nicolas Sabouret, Vincent Corruble	Modeling the Dynamics of Virtual Agent's Social Relations.	IVA	2008	DBLP DOI BibTeX RDF
23	Yufang Cheng, Shuhui Ling	3D Animated Facial Expression and Autism in Taiwan.	ICALT	2008	DBLP DOI BibTeX RDF
23	Nilma Perera, Gregor E. Kennedy, Jon M. Pearce	Are you bored?: Maybe an interface agent can help!	OZCHI	2008	DBLP DOI BibTeX RDF	emotional contagion, emotive interface agents, perception and task boredom, affective computing
23	Chin-Han Chen, Ming-Fang Weng, Shyh-Kang Jeng, Yung-Yu Chuang	Emotion-Based Music Visualization Using Photos.	MMM	2008	DBLP DOI BibTeX RDF	Emotion detection, Music visualization
23	Jiri Pribil, Anna Pribilová	Spectral Flatness Analysis for Emotional Speech Synthesis and Transformation.	COST 2102 Conference (Prague)	2008	DBLP DOI BibTeX RDF	spectral flatness, speech analysis and synthesis, emotional speech
23	Cheng-Te Li, Man-Kwan Shan	Affective Space Exploration for Impressionism Paintings.	PCM	2008	DBLP DOI BibTeX RDF	Affective space, Color harmony, Emotionalization, Multiple-type latent semantic analysis, Paintings, Feature clustering
23	H. Leng, Y. Lin, L. A. Zanzi	An Experimental Study on Physiological Parameters Toward Driver Emotion Recognition.	HCI (17)	2007	DBLP DOI BibTeX RDF	multimodality, emotion recognition, driving, physiological signal
23	Fatma Nasoz, Christine L. Lisetti	Affective User Modeling for Adaptive Intelligent User Interfaces.	HCI (3)	2007	DBLP DOI BibTeX RDF	Human Computer Interaction, User Modeling, Intelligent Interfaces, Bayesian Belief Networks
23	Natascha Esau, Lisa Kleinjohann, Bernd Kleinjohann	Integration of emotional reactions on human facial expressions into the robot head MEXI.	IROS	2007	DBLP DOI BibTeX RDF
23	Cheng-Te Li, Man-Kwan Shan	Emotion-based impressionism slideshow with automatic music accompaniment.	ACM Multimedia	2007	DBLP DOI BibTeX RDF	music accompaniment, association discovery, slideshow
23	Robert Lowe, Carlos Herrera Pérez, Anthony F. Morse, Tom Ziemke	The Embodied Dynamics of Emotion, Appraisal and Attention.	WAPCV	2007	DBLP DOI BibTeX RDF	embodied appraisals, relational phenomena, attentional emotion-appraisal amalgams, dynamical systems
23	Li Zhang 0013, Marco Gillies, John A. Barnden, Robert J. Hendley, Mark G. Lee, Alan M. Wallington	Affect Detection and an Automated Improvisational AI Actor in E-Drama.	Artifical Intelligence for Human Computing	2007	DBLP DOI BibTeX RDF	E-drama, improvisational AI actor, emotional behaviour and metaphor, affect detection
23	Jeffrey F. Cohn	Foundations of Human Computing: Facial Expression and Emotion.	Artifical Intelligence for Human Computing	2007	DBLP DOI BibTeX RDF	automatic facial image analysis, human-computer interaction, measurement, Emotion, facial expression, temporal dynamics
23	Yi-Hsuan Yang, Yu-Ching Lin, Ya-Fan Su, Homer H. Chen	Music Emotion Classification: A Regression Approach.	ICME	2007	DBLP DOI BibTeX RDF
23	Regina Bernhaupt, Andreas Boldt, Thomas Mirlacher, David Wilfinger, Manfred Tscheligi	Using emotion in games: emotional flowers.	Advances in Computer Entertainment Technology	2007	DBLP DOI BibTeX RDF	collaborative, game, emotion, ambient display, social
23	Parag Chordia, Alex Rae	Understanding Emotion in Raag: An Empirical Study of Listener Responses.	CMMR	2007	DBLP DOI BibTeX RDF
23	Karla Parussel, Lola Cañamero	Biasing Neural Networks Towards Exploration or Exploitation Using Neuromodulation.	ICANN (2)	2007	DBLP DOI BibTeX RDF
23	Hisayuki Narahara, Takashi Maeno	Factors of gestures of robots for smooth communication with humans.	ROBOCOMM	2007	DBLP DOI BibTeX RDF
23	Eva Navas, Inma Hernáez, Iker Luengo	An objective and subjective study of the role of semantics and prosodic features in building corpora for emotional TTS.	IEEE Trans. Speech Audio Process.	2006	DBLP DOI BibTeX RDF
23	S. Ramamohan, Samarendra Dandapat	Sinusoidal model-based analysis and classification of stressed speech.	IEEE Trans. Speech Audio Process.	2006	DBLP DOI BibTeX RDF
23	Brian Parkinson	Invited Talk: Social Effects of Emotion: Two Modes of Relation Alignment.	IVA	2006	DBLP DOI BibTeX RDF
23	Mohammed E. Hoque 0001, Mohammed Yeasin, Max M. Louwerse	Robust Recognition of Emotion from Speech.	IVA	2006	DBLP DOI BibTeX RDF	machine learning, speech, emotion recognition, prosody
23	Soo-jeong Kim, Eun Yi Kim, Karpjoo Jeong, Jee-In Kim	Emotion-Based Textile Indexing Using Colors, Texture and Patterns.	ISVC (2)	2006	DBLP DOI BibTeX RDF
23	Mohamed Ben Ammar, Mahmoud Neji	A multi-agent based system for affective peer-e-learning.	MobiMedia	2006	DBLP DOI BibTeX RDF	e-learning environment, facial interaction, peer to peer e-learning, multi-agents architecture
23	Holger Hoffmann, Harald C. Traue, Franziska Bachmayr, Henrik Kessler	Perception of Dynamic Facial Expressions of Emotion.	PIT	2006	DBLP DOI BibTeX RDF
23	Kazuyuki Matsumoto, Fuji Ren, Shingo Kuroiwa	Emotion Estimation System Based on Emotion Occurrence Sentence Pattern.	ICIC (2)	2006	DBLP DOI BibTeX RDF
23	P. Ravindra De Silva, Ajith P. Madurapperuma, Ashu Marasinghe, Minetada Osano	Integrating Animated Pedagogical Agent as Motivational Supporter into Interactive System.	CRV	2006	DBLP DOI BibTeX RDF
23	Eva Hudlicka	Depth of Feelings: Alternatives for Modeling Affect in User Models.	TSD	2006	DBLP DOI BibTeX RDF
23	Hadi Seyedarabi, Won-Sook Lee, Ali Aghagolzadeh, Sohrab Khanmohammadi	Facial Expressions Recognition in a Single Static as well as Dynamic Facial Images Using Tracking and Probabilistic Neural Networks.	PSIVT	2006	DBLP DOI BibTeX RDF	Action Units, Facial Expressions, Active contours, Probabilistic Neural Networks
23	Nelson Zagalo, Ana Torres, Vasco A. Branco	Emotional Spectrum Developed by Virtual Storytelling.	International Conference on Virtual Storytelling	2005	DBLP DOI BibTeX RDF
23	Eduardo Coutinho, Eduardo Reck Miranda, Patricio da Silva	Evolving Emotional Behaviour for Expressive Performance of Music.	IVA	2005	DBLP DOI BibTeX RDF
23	Ricardo Imbert, Angélica de Antonio	When Emotion Does Not Mean Loss of Control.	IVA	2005	DBLP DOI BibTeX RDF
23	Alberto Battocchi, Fabio Pianesi, Dina Goren-Bar	A first evaluation study of a database of kinetic facial expressions (DaFEx).	ICMI	2005	DBLP DOI BibTeX RDF	quality of facial displays, databases, user study, expressiveness, emotion recognition
23	Bozena Kostek, Piotr Szczuko	Analysis and Generation of Emotionally-Charged Animated Gesticulation.	RSFDGrC (2)	2005	DBLP DOI BibTeX RDF
23	Iulia Dobai, Léon J. M. Rothkrantz, Charles van der Mast	Personality model for a companion AIBO.	Advances in Computer Entertainment Technology	2005	DBLP DOI BibTeX RDF	AIBO-robot, companion robot, human-computer interaction, personality modeling
23	Zeljko Obrenovic, Nestor Garay, Juan Miguel López 0001, Inmaculada Fajardo, Idoia Cearreta	An Ontology for Description of Emotional Cues.	ACII	2005	DBLP DOI BibTeX RDF
23	Noël Chateau, Valérie Maffiolo, Nathalie Pican, Marc Mersiol	The Effect of Embodied Conversational Agents' Speech Quality on Users' Attention and Emotion.	ACII	2005	DBLP DOI BibTeX RDF
23	Rui Figueiredo, Ana Paiva 0001	Watch and Feel: An Affective Interface in a Virtual Storytelling Environment.	ACII	2005	DBLP DOI BibTeX RDF	Affective tangible interface, affective computing, synthetic characters
23	Patrick Gebhard	ALMA: a layered model of affect.	AAMAS	2005	DBLP DOI BibTeX RDF	embodied conversational characters, simulation of affect, personality, emotion, mood
23	Marc Fabri, David J. Moore, Dave J. Hobbs	Mediating the expression of emotion in educational collaborative virtual environments: an experimental study.	Virtual Real.	2004	DBLP DOI BibTeX RDF	Emotion, Collaborative virtual environment, Avatar, Facial expression
23	Masayoshi Kanoh, Shohei Kato, Hidenori Itoh	Analyzing Emotional Space in Sensitivity Communication Robot "Ifbot".	PRICAI	2004	DBLP DOI BibTeX RDF
23	Liyanage C. De Silva	Audiovisual emotion recognition.	SMC (1)	2004	DBLP DOI BibTeX RDF
23	David Joseph Chaplin, Abdennour El Rhalibi	IPD for emotional NPC societies in games.	Advances in Computer Entertainment Technology	2004	DBLP DOI BibTeX RDF	prisoners dilemma, social interaction and simulation, multi-agents system, emotional models, RBS
23	Hirofumi Morioka, Mie Nakatani, Shogo Nishida	Proposal of an algorithm to synthesize music suitable for dance.	Advances in Computer Entertainment Technology	2004	DBLP DOI BibTeX RDF	SMF, emotion, music, dance
23	Young-Suk Shin	Facial Expression Recognition Based on Dimension Model Using Sparse Coding.	International Conference on Computational Science	2004	DBLP DOI BibTeX RDF
23	Ana Paiva 0001, Rui Prada, Ricardo Chaves, Marco Vala, Adrian Bullock, Gerd Andersson, Kristina Höök	Towards tangibility in gameplay: building a tangible affective interface for a computer game.	ICMI	2003	DBLP DOI BibTeX RDF	affective computing, tangible interfaces, characters, synthetic
23	Andrew Lee, Mohammed Ibrahim	Emotional Attributes in Autonomic Computing Systems.	DEXA Workshops	2003	DBLP DOI BibTeX RDF
23	Hartwig Holzapfel, Christian Fügen, Matthias Denecke, Alex Waibel	Integrating Emotional Cues into a Framework for Dialogue Management.	ICMI	2002	DBLP DOI BibTeX RDF
23	Stacy Marsella, Jonathan Gratch	A step toward irrationality: using emotion to change belief.	AAMAS	2002	DBLP DOI BibTeX RDF	coping strategies, emotion, cognitive modeling, believability
23	Liyanage C. De Silva, Pei Chi Ng	Bimodal Emotion Recognition.	FG	2000	DBLP DOI BibTeX RDF
23	Carlos Martinho, Ana Paiva 0001	"Underwater Love": Building Tristão and Isolda's Personalities.	Artificial Intelligence Today	1999	DBLP DOI BibTeX RDF
23	Magy Seif El-Nasr, Thomas R. Ioerger, John Yen, Donald H. House, Frederic I. Parke	Emotionally Expressive Agents.	CA	1999	DBLP DOI BibTeX RDF
21	Nicole A. Beres, Madison Klarkowski, Regan L. Mandryk	Playing with Emotions: A Systematic Review Examining Emotions and Emotion Regulation in Esports Performance.	Proc. ACM Hum. Comput. Interact.	2023	DBLP DOI BibTeX RDF
21	Lukas Christ, Shahin Amiriparian, Alice Baird, Alexander Kathan, Niklas Müller, Steffen Klug, Chris Gagne 0001, Panagiotis Tzirakis, Lukas Stappen, Eva-Maria Meßner, Andreas König 0007, Alan Cowen, Erik Cambria, Björn W. Schuller	The MuSe 2023 Multimodal Sentiment Analysis Challenge: Mimicked Emotions, Cross-Cultural Humour, and Personalisation.	MuSe@ACM Multimedia	2023	DBLP DOI BibTeX RDF
21	Neha Warikoo, Tobias Mayer 0004, Dana Atzil-Slonim, Amir Eliassaf, Shira Haimovitz, Iryna Gurevych	NLP meets psychotherapy: Using predicted client emotions and self-reported client emotions to measure emotional coherence.	CoRR	2022	DBLP DOI BibTeX RDF
21	Valérie Erb, Haesoo Kim, Tatiana Chibisova, Jeongmi Lee, Young Yim Doh	Play With Your Emotions: Exploring Possibilities of Emotions as Game Input in NERO.	CHI Extended Abstracts	2022	DBLP DOI BibTeX RDF
21	Dongho Koo, Tania (Tee) C. O'Neill, Salih Berk Dinçer, Hin Kwan (Billy) Kwok, Felicia Renelus	Immersive Emotions: Translating Emotions Into Visualization.	MobileHCI (Adjunct)	2022	DBLP DOI BibTeX RDF