Search results for "diffusion"

Hits ?▲	Authors	Title	Venue	Year	Link	Author keywords
21	Thrasyvoulos N. Pappas, David L. Neuhoff	Printer models and error diffusion.	IEEE Trans. Image Process.	1995	DBLP DOI BibTeX RDF
21	Hans Kosina, Siegfried Selberherr	A hybrid device simulator that combines Monte Carlo and drift-diffusion analysis.	IEEE Trans. Comput. Aided Des. Integr. Circuits Syst.	1994	DBLP DOI BibTeX RDF
21	Martin D. Giles	Defect-coupled diffusion at high concentrations.	IEEE Trans. Comput. Aided Des. Integr. Circuits Syst.	1989	DBLP DOI BibTeX RDF
21	Andrzej Duda	Transient diffusion approximation for some queuening systems.	SIGMETRICS	1983	DBLP DOI BibTeX RDF
21	Hisashi Kobayashi	Application of the Diffusion Approximation to Queueing Networks I: Equilibrium Queue Distributions.	J. ACM	1974	DBLP DOI BibTeX RDF
21	Haewoon Kwak, Changhyun Lee, Hosung Park, Sue B. Moon	What is Twitter, a social network or a news media?	WWW	2010	DBLP DOI BibTeX RDF	degree of separation, influential, retweet, pagerank, Twitter, reciprocity, online social network, information diffusion, homophily
21	Ikumi Suzuki, Kazuo Hara, Masashi Shimbo, Yuji Matsumoto 0001	A graph-based approach for biomedical thesaurus expansion.	DTMBIO	2009	DBLP DOI BibTeX RDF	laplacian diffusion kernel, thesaurus expansion
21	Jérémie Gerhardt, Jon Yngve Hardeberg	Simple Comparison of Spectral Color Reproduction Workflows.	SCIA	2009	DBLP DOI BibTeX RDF	Spectral color reproduction, spectral gamut mapping, colorant separation, spectral vector error diffusion, halftoning
21	Yiming Chen 0002, Zhoujun Li 0001, Junwan Liu	Learning Kernel Matrix from Gene Ontology and Annotation Data for Protein Function Prediction.	ISNN (3)	2009	DBLP DOI BibTeX RDF	Diffusion kernel, Gene ontology, Protein function prediction
21	Maria Teresa Baldassarre, Giovanni Bruno, Danilo Caivano, Giuseppe Visaggio	The Role of Empirical Evidence for Transferring a New Technology to Industry.	PROFES	2009	DBLP DOI BibTeX RDF	Technology transfer, innovation diffusion, empirical evidence
21	Yun-Fu Liu, Jing-Ming Guo, Jiann-Der Lee	Inverse Halftoning Based on Bayesian Theorem.	PSIVT	2009	DBLP DOI BibTeX RDF	inverse halftoning, Bayesian theorem, halftoning classification, Halftoning, error diffusion
21	Ye Zhao 0003	Lattice Boltzmann based PDE solver on the GPU.	Vis. Comput.	2008	DBLP DOI BibTeX RDF	Laplace and Poisson equation, Volume smoothing, Diffusion, Image editing, Lattice Boltzmann model, Surface fairing
21	Craig Van Slyke, Richard D. Johnson, Ross Hightower, Wafa Elgarah	Implications of researcher assumptions about perceived relative advantage and compatibility.	Data Base	2008	DBLP DOI BibTeX RDF	innovation diffusion theory, relative advantage, scale reuse, adoption, compatibility
21	Thomas Bonald, Laurent Massoulié, Fabien Mathieu, Diego Perino, Andrew Twigg	Epidemic live streaming: optimal performance trade-offs.	SIGMETRICS	2008	DBLP DOI BibTeX RDF	epidemic diffusion, p2p live streaming, delay optimality
21	Vicky Y. Wang, Hoi Ieng Lam, Daniel B. Ennis, Alistair A. Young, Martyn P. Nash	Passive Ventricular Mechanics Modelling Using MRI of Structure and Function.	MICCAI (2)	2008	DBLP DOI BibTeX RDF	Left Ventricular (LV) mechanics, Diffusion Tensor MRI (DTMRI), Finite Element Modelling, Cardiac Magnetic Resonance Imaging (MRI)
21	Won-Ki Jeong, P. Thomas Fletcher, Ran Tao 0011, Ross T. Whitaker	Interactive Visualization of Volumetric White Matter Connectivity in DT-MRI Using a Parallel-Hardware Hamilton-Jacobi Solver.	IEEE Trans. Vis. Comput. Graph.	2007	DBLP DOI BibTeX RDF	Diffusion tensor visualization, interactivity, graphics hardware
21	Noor Hazarina Hashim, Jamie Murphy, Peter O'Connor	Take Me Back: Validating the Wayback Machine as a Measure of Website Evolution.	ENTER	2007	DBLP DOI BibTeX RDF	Wayback Machine, Internet, websites, diffusion of innovations
21	Mark Coates, Yvan Pointurier, Michael G. Rabbat	Compressed network monitoring for ip and all-optical networks.	Internet Measurement Conference	2007	DBLP DOI BibTeX RDF	diffusion wavelets, network monitoring, compressed sensing
21	Sanjeev Swami, Pankaj J. Khairnar	Optimal normative policies for marketing of products with limited availability.	Ann. Oper. Res.	2006	DBLP DOI BibTeX RDF	Product diffusion models, Marketing policies, Optimal control
21	Oliver Hein, Michael Schwind, Wolfgang König	Scale-free networks.	Wirtschaftsinf.	2006	DBLP DOI BibTeX RDF	Communication Networks, Diffusion, Scale-Free Networks, Random Networks, Socio-Technical Networks
21	Xavier Pennec, Pierre Fillard, Nicholas Ayache	A Riemannian Framework for Tensor Computing.	Int. J. Comput. Vis.	2006	DBLP DOI BibTeX RDF	affine-invariant metric, interpolation, regularization, PDE, tensors, extrapolation, Riemannian manifold, diffusion tensor MRI
21	Chunxia Xiao, Yongwei Miao, Shu Liu, Qunsheng Peng 0001	A dynamic balanced flow for filtering point-sampled geometry.	Vis. Comput.	2006	DBLP DOI BibTeX RDF	Anisotropic diffusion flow, Dynamic balanced flow, Filtering, Point-sampled geometry, Covariance analysis
21	Wensheng Shen, Jun Zhang 0001, Fuqian Yang	Newton's method for steady and unsteady reacting flows.	ACM Southeast Regional Conference	2006	DBLP DOI BibTeX RDF	bomputational science, diffusion flame, Newton's method, iterative solver
21	Fabio Farina, Gianpiero Cattaneo, Alberto Dennunzio	Grid and HPC Dynamic Load Balancing with Lattice Boltzmann Models.	OTM Conferences (2)	2006	DBLP DOI BibTeX RDF	diffusion algorithm, Dynamic Load Balancing, Lattice Boltzmann Models
21	Gang Yu, Yuxiang Yang, Peng Li, Zhengzhong Bian	Robust Segmentation for Left Ventricle Based on Curve Evolution.	KES (3)	2006	DBLP DOI BibTeX RDF	Echocardiographic Image, Mathematical morphology, Level set, Gaussian distribution, Nonlinear diffusion
21	Xiping He, Qingsheng Zhu, Ping Gu	A New Chaos-Based Encryption Method for Color Image.	RSKT	2006	DBLP DOI BibTeX RDF	ergodic matrix, encryption, attack, diffusion, S-box, confusion, Chaotic map
21	Ke Chen 0001	Adaptive Smoothing via Contextual and Local Discontinuities.	IEEE Trans. Pattern Anal. Mach. Intell.	2005	DBLP DOI BibTeX RDF	inhomogeneity, spatial gradient, local scale control, multiple scales, the termination problem, extraction of hydrographic objects, anisotropic diffusion, noise removal, feature preservation, Adaptive smoothing
21	Daniel Fagerström	Temporal Scale Spaces.	Int. J. Comput. Vis.	2005	DBLP DOI BibTeX RDF	temporal measurement, stable density functions, fractional diffusion, scale-space
21	Jorik Blaas, Charl P. Botha, Bart Peters, Frans Vos, Frits H. Post	Fast and Reproducible Fiber Bundle Selection in DTI Visualization.	IEEE Visualization	2005	DBLP DOI BibTeX RDF	diffusion tensor imaging, white matter, tractography
21	Lei-da Chen, Mark Lee Gillenson, Daniel L. Sherrell	Consumer acceptance of virtual stores: a theoretical model and critical success factors for virtual stores.	Data Base	2004	DBLP DOI BibTeX RDF	virtual store, electronic commerce, technology acceptance model, critical success factor, innovation diffusion, online retailing
21	Jian-Jun Xu, Hong-Kai Zhao	An Eulerian Formulation for Solving Partial Differential Equations Along a Moving Interface.	J. Sci. Comput.	2003	DBLP DOI BibTeX RDF	moving interfaces, surface convection and diffusion, surfactant, semi-implicit method, level set method
21	Claudio Moraga, Chongfu Huang	Learning subjective probabilities from a small data set.	ISMVL	2003	DBLP DOI BibTeX RDF	subjective probabilities, Information diffusion, sparse data
21	Ana Georgina Flesia, David L. Donoho	Implications for Image Watermarking of Recent Work in Image Analysis and Representation.	IWDW	2002	DBLP DOI BibTeX RDF	Image Steganography, Natural Scene Statistics, Geometric Diffusion by Level Set Methods, Computational Harmonic Analysis, Wavelets, Interpolation, Discrete Cosine Transform, Inpainting, Image Watermarking, Total Variation
21	Thomas Bülow	Multiscale Image Processing on the Sphere.	DAGM-Symposium	2002	DBLP DOI BibTeX RDF	Spherical Images, Spherical Gaussian, Linear Diffusion, LSI Filters, Omnidirectional Images
21	Don Coppersmith, Shai Halevi, Charanjit S. Jutla	Cryptanalysis of Stream Ciphers with Linear Masking.	CRYPTO	2002	DBLP DOI BibTeX RDF	Linear masking, Low-Diffusion attacks, Stream ciphers, Hypothesis testing, Linear cryptanalysis
21	Qing Li, Chuguang Zheng, Nengchao Wang, Baochang Shi	LBGK Simulations of Turing Patterns in CIMA Model.	J. Sci. Comput.	2001	DBLP DOI BibTeX RDF	reaction-diffusion equation, Turing patterns, CIMA model, lattice Boltzmann method
21	Mike W. Chiasson, Chris Y. Lovato	Factors influencing the formation of a user's perceptions and use of a DSS software innovation.	Data Base	2001	DBLP DOI BibTeX RDF	diffusion of technology, perceived characteristics of an innovation, subjective norms, user competence, decision support systems, implementation, adoption, organizational factors
21	Jon D. Kendall, Lai Lai Tung, Khoon Hui Chua, Chia Ng, Suan Meng Tan	Electronic Commerce Adoption by SMEs in Singapore.	HICSS	2001	DBLP DOI BibTeX RDF	Electronic Commerce and Innovation Diffusion, Small and medium-sized enterprises
21	Henrik Wann Jensen, Stephen R. Marschner, Marc Levoy, Pat Hanrahan	A practical model for subsurface light transport.	SIGGRAPH	2001	DBLP DOI BibTeX RDF	reflection models, realistic image synthesis, subsurface scattering, light transport, BSSRDF, diffusion theory
21	Patrick Shen-Pei Wang	3D Object Recognition and Visualization on the Web.	Web Intelligence	2001	DBLP DOI BibTeX RDF	visualization and interpretation, 3D articulated objects, diffusion tomography, finite representation, on-line virtual environment, pattern recognition, learning, interactive learning, linear combination
21	Sue Newell, Jacky Swan, Maxine Robertson	A Cross-National Comparison of the Adoption of BPR: An Interactive Perspective.	HICSS (1)	1998	DBLP DOI BibTeX RDF	Business Process Reengineering, Innovation diffusion, inter-Organizational networking
21	Andrew B. Kahng, Sudhakar Muddu	Analysis of RC interconnections under ramp input.	ACM Trans. Design Autom. Electr. Syst.	1997	DBLP DOI BibTeX RDF	diffusion equation analysis, ramp input response, VLSI interconnects
21	Kaleem Siddiqi, Benjamin B. Kimia	A shock grammar for recognition.	CVPR	1996	DBLP DOI BibTeX RDF	shock grammar, two-dimensional shape, subpixel local detectors, global consistency, reaction-diffusion space, scale changes, computer vision, object recognition, recognition, occlusion, singularities, geometric constraints, shocks
20	Hikaru Yamamoto, Naohiro Matsumura	The Power of Grassroots Influentials: The Optimal Heterophily between Sender and Receiver.	CSE (4)	2009	DBLP DOI BibTeX RDF
20	Mohammad Reza Hajiaboli	An Anisotropic Fourth-Order Partial Differential Equation for Noise Removal.	SSVM	2009	DBLP DOI BibTeX RDF
20	Hans Dierckx, Alan P. Benson, Stephen H. Gilbert, Michael E. Ries, Arun V. Holden, Henri Verschelde, Olivier Bernus	Intravoxel Fibre Structure of the Left Ventricular Free Wall and Posterior Left-Right Ventricular Insertion Site in Canine Myocardium Using Q-Ball Imaging.	FIMH	2009	DBLP DOI BibTeX RDF
20	Andrzej Bielecki, Piotr Kalita, Marian Lewandowski, Marek Skomorowski	Compartment model of neuropeptide synaptic transport with impulse control.	Biol. Cybern.	2008	DBLP DOI BibTeX RDF
20	Simon Shelley, Damian T. Murphy	The Modeling of Diffuse Boundaries in the 2-D Digital Waveguide Mesh.	IEEE Trans. Speech Audio Process.	2008	DBLP DOI BibTeX RDF
20	Satya Saripalli, Vikram Dalal	Microcrystalline silicon-germanium solar cells fabricated using VHF PECVD.	EIT	2008	DBLP DOI BibTeX RDF
20	Oleg V. Michailovich, Yogesh Rathi	On approximation of orientation distributions by means of spherical ridgelets.	ISBI	2008	DBLP DOI BibTeX RDF
20	Marcel Prastawa, Guido Gerig	Brain Lesion Segmentation through Physical Model Estimation.	ISVC (1)	2008	DBLP DOI BibTeX RDF
20	Sean P. Meyn, Gregory Hagen, George Mathew, Andrzej Banaszuk	On complex spectra and metastability of Markov models.	CDC	2008	DBLP DOI BibTeX RDF
20	Xiaoming Lu, Matt Spear, Karl N. Levitt, Shyhtsun Felix Wu	iBubble: Multi-Keyword Routing Protocol for Heterogeneous Wireless Sensor Networks.	INFOCOM	2008	DBLP DOI BibTeX RDF
20	Angelos Barmpoutis, Baba C. Vemuri, Dena Howland, John R. Forder	Extracting Tractosemas from a Displacement Probability Field for Tractography in DW-MRI.	MICCAI (1)	2008	DBLP DOI BibTeX RDF
20	Sharon Peled	New Perspectives on the Sources of White Matter DTI Signal.	IEEE Trans. Medical Imaging	2007	DBLP DOI BibTeX RDF
20	Shishir Bharathi, David Kempe 0001, Mahyar Salek	Competitive Influence Maximization in Social Networks.	WINE	2007	DBLP DOI BibTeX RDF
20	Chao-Yong Hsu, Chun-Shien Lu, Soo-Chang Pei	Video Halftoning Preserving Temporal Consistency.	ICME	2007	DBLP DOI BibTeX RDF
20	Fadoua Drira, Frank Lebourgeois, Hubert Emptoz	OCR Accuracy Improvement through a PDE-Based Approach.	ICDAR	2007	DBLP DOI BibTeX RDF
20	Qun Li 0001, Daniela Rus	Global Clock Synchronization in Sensor Networks.	IEEE Trans. Computers	2006	DBLP DOI BibTeX RDF	fault tolerance, Sensor networks
20	Xiaogang Dong, Ilya Pollak	Multiscale Segmentation With Vector-Valued Nonlinear Diffusions on Arbitrary Graphs.	IEEE Trans. Image Process.	2006	DBLP DOI BibTeX RDF
20	Jangheon Kim, Thomas Sikora	Robust Anisotropic Disparity Estimation with Perceptual Maximum Variation Modeling.	ICIP	2006	DBLP DOI BibTeX RDF
20	Felix Köbler, Jan Marco Leimeister, Artur Lugmayr	Framework for Systematic and Strategic Planning of Innovation-Based Mobile Broadband Services.	PDP	2006	DBLP DOI BibTeX RDF
20	Christophe Lenglet, Mikaël Rousson, Rachid Deriche	A statistical framework for DTI segmentation.	ISBI	2006	DBLP DOI BibTeX RDF
20	Xiaogang Dong, Ilya Pollak	Multiscale texture segmentation with vector-valued nonlinear diffusions on arbitrary graphs.	ICIP (3)	2005	DBLP DOI BibTeX RDF
20	Kohei Tsuda, Ruck Thawonmas	Keyword Discovery by Measuring Influence Rates on Bulletin Board Services.	ICEC	2005	DBLP DOI BibTeX RDF	Keyword Discovery, Tree-style BBSs, MMOGs, Comments
20	Yeong-Wha Sawng, Jeong-Su Lee, Hyun-Soo Han	Market Acceptance for the Satellite DMB (Digital Multimedia Broadcasting) Services in Korea.	ICMB	2005	DBLP DOI BibTeX RDF
20	Michael Felsberg, Gösta H. Granlund	Anisotropic Channel Filtering.	SCIA	2003	DBLP DOI BibTeX RDF
20	Sean C. L. Deoni, Brian K. Rutt, Terry M. Peters	Visualization of Neural DTI Vector Fields Using Line Integral Convolution.	MICCAI (2)	2003	DBLP DOI BibTeX RDF
20	Ross T. Whitaker, Xinwei Xue	Variable-conductance, level-set curvature for image denoising.	ICIP (3)	2001	DBLP DOI BibTeX RDF
20	Yeh-Ching Chung, Ching-Jung Liao, Don-Lin Yang	A Prefix Code Matching Parallel Load-Balancing Method for Solution-Adaptive Unstructured Finite Element Graphs on Distributed Memory Multicomputers.	J. Supercomput.	2000	DBLP DOI BibTeX RDF	solution-adaptive unstructured finite element models, load balancing, partitioning, mapping, distributed memory multicomputers, remapping
20	Yu-Li You, Mostafa Kaveh	Fourth-order partial differential equations for noise removal.	IEEE Trans. Image Process.	2000	DBLP DOI BibTeX RDF
20	Elif Akçali, Reha Uzsoy, David G. Hiscock, Anne L. Moser, Timothy J. Teyner	Alternative loading and dispatching policies for furnace operations in semiconductor manufacturing: a comparison by simulation.	WSC	2000	DBLP DOI BibTeX RDF
20	Sungmin Kang	Information Technology Acceptance: Evolving with the Changes in the Network Environment.	HICSS (1)	1998	DBLP DOI BibTeX RDF
20	Alex Sherstinsky, Rosalind W. Picard	M-lattice: from morphogenesis to image processing.	IEEE Trans. Image Process.	1996	DBLP DOI BibTeX RDF
20	Raghu Subramanian, Isaac D. Scherson	An Analysis of Diffusive Load-Balancing.	SPAA	1994	DBLP DOI BibTeX RDF
20	Jacques E. Boillat	Fast Load Balancing in Cayley Graphs and in Circuits.	WG	1993	DBLP DOI BibTeX RDF
20	Rex E. Lowther	A discretization scheme that allows coarse grid-spacing in finite-difference process simulation.	IEEE Trans. Comput. Aided Des. Integr. Circuits Syst.	1989	DBLP DOI BibTeX RDF
18	Pratap Chandra Mandal	Management of Service Quality With Involvement of Technological Developments in Organizations.	Int. J. Technol. Diffusion	2023	DBLP DOI BibTeX RDF
18	Pratap Chandra Mandal	Marketing Information and Marketing Intelligence: Generation of Customer Insights.	Int. J. Technol. Diffusion	2022	DBLP DOI BibTeX RDF
18	Fateh Boutekkouk	Embedded Systems Design Space Exploration Under Security Constraints.	Int. J. Technol. Diffusion	2022	DBLP DOI BibTeX RDF
18	Mohammad Mahmudul Hasan, Fowjia Tajnin Muna	Technology Trends and Cyber Security in Bangladesh: Myths and Reality.	Int. J. Technol. Diffusion	2022	DBLP DOI BibTeX RDF
18	Aurore J. Kamssu, Gerald P. Marquis	Fog and Cloud Computing: A Solution for Business Application Deployment.	Int. J. Technol. Diffusion	2022	DBLP DOI BibTeX RDF
18	Lokendra Singh Umrao, Subhash Chandra Patel, Santosh Kumar 0006	Blockchain-Based Reliable Framework for Land Registration Information System.	Int. J. Technol. Diffusion	2022	DBLP DOI BibTeX RDF
18	Quistina Omar, Ching Seng Yap, Khin Than Myint, Poh Ling Ho, William Keling	Factors Influencing Behavioural Intention to Adopt the E-AgriFinance App Among Farmers: Extended UTAUT With Technology Readiness.	Int. J. Technol. Diffusion	2022	DBLP DOI BibTeX RDF
18	Manal Y. Alduaij, Mariam A. Alterkait	Exploring Contextual Factors of User E-Commerce Adoption During Coronavirus.	Int. J. Technol. Diffusion	2022	DBLP DOI BibTeX RDF
18	Abderrazak Sebaa	View Materialization for Query Processing in IoT Systems.	Int. J. Technol. Diffusion	2022	DBLP DOI BibTeX RDF
18	Reem Al-Kaabi, Hayat Ali, Khurram Salman, Roya Alsaati	Social Networking Sites (SNS): The Factors of User Intention Toward Online Self-Disclosure in the Kingdom of Bahrain.	Int. J. Technol. Diffusion	2022	DBLP DOI BibTeX RDF
18	Prakrit Silal, Debashis Saha	Explaining Country Heterogeneity in E-Government Evolution Based on Longitudinal Analysis of Nations.	Int. J. Technol. Diffusion	2021	DBLP DOI BibTeX RDF
18	Donald L. Amoroso, Osam Sato, Pajaree Ackaradejruangsri	Dual-Factor Approach to Consumer Acceptance of Mobile Banking.	Int. J. Technol. Diffusion	2021	DBLP DOI BibTeX RDF
18	Hamsa Yasser Amro, Shahenaz Najjar, Mohammed Moreb	Electronic Surveillance System for COVID-19 Virus Management in Palestine: An Observational Study.	Int. J. Technol. Diffusion	2021	DBLP DOI BibTeX RDF
18	Furqan Nasir, Haji Gul, Muhammad Bakhsh, Abdus Salam	Comparitive Analysis of Link Prediction in Complex Networks.	Int. J. Technol. Diffusion	2021	DBLP DOI BibTeX RDF
18	Justice Kwame Appati	Performance and Applicability of Transfer Learners for Cocoa Swollen Shoot Detection.	Int. J. Technol. Diffusion	2021	DBLP DOI BibTeX RDF
18	Rania Fakhoury, Bilal Chebaro	E-Government Acceptance and Trust: An Empirical Model Based on UTAUT2 in Lebanon.	Int. J. Technol. Diffusion	2021	DBLP DOI BibTeX RDF
18	Karim Zarour, Djamel Benmerzoug	A Requirements-Oriented Modelling Language for an Optimized Distribution of Business Processes on a Multi-Cloud Environment.	Int. J. Technol. Diffusion	2021	DBLP DOI BibTeX RDF
18	Frank Makoza	Governmentality of Value Added Tax Compliance Using Electronic Fiscal Devices in Malawi.	Int. J. Technol. Diffusion	2021	DBLP DOI BibTeX RDF
18	Fateh Boutekkouk	Architecture Description Languages Taxonomies Review: A Special Focus on Self-Adaptive Distributed Embedded Systems.	Int. J. Technol. Diffusion	2021	DBLP DOI BibTeX RDF
18	J. Dinesh Kumar, Arulchelvan Sriram	Information and Communication Technologies Use and Its Influence in Family Functioning: Development of Measuring Instrument for the Factors in Hertlein's Multi-Theoretical Model.	Int. J. Technol. Diffusion	2021	DBLP DOI BibTeX RDF
18	Farhod Pulatovich Karimov	Building Trust in eCommerce: An Experimental Study of Social-Cue Design Dimensions.	Int. J. Technol. Diffusion	2021	DBLP DOI BibTeX RDF
18	Fateh Boutekkouk, Narimane Sahel	Color Image Processing Under Uncertainty.	Int. J. Technol. Diffusion	2021	DBLP DOI BibTeX RDF
18	Rima Boumaza, Fateh Boutekkouk	Intellectual Properties Integration: The Past, the Present, and the Future.	Int. J. Technol. Diffusion	2021	DBLP DOI BibTeX RDF