Search results for "network simulators"

Hits ?▲	Authors	Title	Venue	Year	Link	Author keywords
3	Abderrezak Rachedi, Stéphane Lohier, Sylvain Cherrier, Ismail Salhi	Wireless network simulators relevance compared to a real testbed in outdoor and indoor environments.	IWCMC	2010	DBLP DOI BibTeX RDF	wireless networks, 802.11, testbed, network simulators, propagation models
3	Dalimir Orfanus, Johannes Lessmann, Peter Janacik, Lazar Lachev	Performance of wireless network simulators: a case study.	PM2HW2N	2008	DBLP DOI BibTeX RDF	ShoX, model of quality, model properties, wireless network, case study, reusability, network simulators, maintainability, ns-2, OMNeT++, SPAN, J-Sim
2	Jinman Jung, Yookun Cho, Yeongkwun Kim, Yoojin Chung, Bongchan Gim, Jiyoung Kwak	Virtual protocol stack interface for multiple wireless sensor network simulators.	SAC	2010	DBLP DOI BibTeX RDF	simulation, wireless sensor networks
2	Tsong Yueh Chen, Fei-Ching Kuo, Huai Liu, Shengqiong Wang	Conformance Testing of Network Simulators Based on Metamorphic Testing Technique.	FMOODS/FORTE	2009	DBLP DOI BibTeX RDF
2	Puttipong Mahasukhon, Hamid Sharif, Michael Hempel, Ting Zhou, Wei Wang 0015, Tao Ma	Type I HARQ performance modeling and evaluation of mobile WiMAX for network simulators.	IWCMC	2009	DBLP DOI BibTeX RDF	type I hybrid ARQ, network simulator, mobile WiMAX
2	L. Felipe Perrone, Claudio Cicconetti, Giovanni Stea, Bryan C. Ward	On the automation of computer network simulators.	SimuTools	2009	DBLP DOI BibTeX RDF	network simulation, best practices, simulation tools
2	Marat Zhanikeev	Between small complex and large simplistic network simulators.	SimuTools	2008	DBLP DOI BibTeX RDF	large topology, simulation, modeling, scalability, computer networks, discrete event simulation, network simulation, traffic
2	Johannes Lessmann, Peter Janacik, Lazar Lachev, Dalimir Orfanus	Comparative Study of Wireless Network Simulators.	ICN	2008	DBLP DOI BibTeX RDF	wireles network simulator, ShoX, case study, ns-2, OMNeT++, SPAN, J-Sim
2	P. Pablo Garrido, Manuel P. Malumbres, Carlos Miguel Tavares Calafate	ns-2 vs. OPNET: a comparative study of the IEEE 802.11e technology on MANET environments.	SimuTools	2008	DBLP DOI BibTeX RDF	performance comparative, MANET, network simulators, 802.11e
2	Cintia B. Margi, Katia Obraczka	Instrumenting Network Simulators for Evaluating Energy Consumption in Power-Aware Ad-Hoc Network Protocols.	MASCOTS	2004	DBLP DOI BibTeX RDF
1	Marinho P. Barcellos, Rodolfo Stoffel Antunes, Hisham H. Muhammad, Ruthiano S. Munaretti	Beyond network simulators: Fostering novel distributed applications and protocols through extendible design.	J. Network and Computer Applications	2012	DBLP DOI BibTeX RDF
1	Alessandro Bazzi, Gianni Pasolini	On the accuracy of physical layer modelling within wireless network simulators.	Simulation Modelling Practice and Theory	2012	DBLP DOI BibTeX RDF
1	Juan Luis Font, Pablo Iñigo, Manuel Domínguez, José Luis Sevillano, Claudio Amaya	Analysis of source code metrics from ns-2 and ns-3 network simulators.	Simulation Modelling Practice and Theory	2011	DBLP DOI BibTeX RDF
1	Juan Luis Font, Pablo Iñigo, Manuel Domínguez, José Luis Sevillano, Claudio Amaya	Analysis of source code metrics from ns-2 and ns-3 network simulators.	Simulation Modelling Practice and Theory	2011	DBLP DOI BibTeX RDF
1	Stéphane Lohier, Abderrezak Rachedi, Erwan Livolant, Ismail Salhi	Wireless Sensor Network simulators relevance compared to a real IEEE 802.15.4 Testbed.	IWCMC	2011	DBLP DOI BibTeX RDF
1	Daniel Günther, Michel Steichen, Nathan Kerr, Paul Müller	Evaluating network simulators as extensions of real network testbeds.	SpringSim (CNS)	2011	DBLP BibTeX RDF
1	Rabiullah Khattak, Anna Chaltseva, Laurynas Riliskis, Ulf Bodin, Evgeny Osipov	Comparison of Wireless Network Simulators with Multihop Wireless Network Testbed in Corridor Environment.	WWIC	2011	DBLP DOI BibTeX RDF
1	Stein Kristiansen, Thomas Plagemann, Vera Goebel	Towards scalable and realistic node models for network simulators.	SIGCOMM	2011	DBLP DOI BibTeX RDF
1	Evangelia Kolega, Vassilios Vescoukis, Dionissios Voutos	Assessment of network simulators for real world WSNs in forest environments.	ICNSC	2011	DBLP DOI BibTeX RDF
1	Makoto Ikeda, Elis Kulla, Leonard Barolli, Makoto Takizawa	Wireless Ad-hoc Networks Performance Evaluation Using NS-2 and NS-3 Network Simulators.	CISIS	2011	DBLP DOI BibTeX RDF
1	Dan F. M. Goodman	Code Generation: A Strategy for Neural Network Simulators.	Neuroinformatics	2010	DBLP DOI BibTeX RDF
1	Mikael Djurfeldt, Johannes Hjorth, Jochen M. Eppler, Niraj Dudani, Moritz Helias, Tobias C. Potjans, Upinder S. Bhalla, Markus Diesmann, Jeanette Hellgren Kotaleski, Örjan Ekeberg	Run-Time Interoperability Between Neuronal Network Simulators Based on the MUSIC Framework.	Neuroinformatics	2010	DBLP DOI BibTeX RDF
1	Juan Luis Font, Pablo Iñigo, Manuel Domínguez, José Luis Sevillano, Claudio Amaya	Architecture, design and source code comparison of ns-2 and ns-3 network simulators.	SpringSim	2010	DBLP DOI BibTeX RDF
1	Mihal Brumbulli, Joachim Fischer	SDL Code Generation for Network Simulators.	SAM	2010	DBLP DOI BibTeX RDF
1	Christian Gross, Max Lehn, Dominik Stingl, Aleksandra Kovacevic, Alejandro P. Buchmann, Ralf Steinmetz	Towards a Common Interface for Overlay Network Simulators.	ICPADS	2010	DBLP DOI BibTeX RDF
1	Qian Li, Fredrik Österlind, Thiemo Voigt, Stefan Fischer, Dennis Pfisterer	Making wireless sensor network simulators cooperate.	PE-WASUN	2010	DBLP DOI BibTeX RDF
1	Stein Kristiansen, Morten Lindeberg, Daniel Rodríguez-Fernández, Thomas Plagemann	On the forwarding capability of mobile handhelds for video streaming over MANETs.	MobiHeld	2010	DBLP DOI BibTeX RDF	performance evaluation, MANETs, video streaming, handhelds
1	Elias Weingärtner, Hendrik vom Lehn, Klaus Wehrle	A Performance Comparison of Recent Network Simulators.	ICC	2009	DBLP DOI BibTeX RDF
1	Joakim Eriksson, Fredrik Österlind, Niclas Finne, Adam Dunkels, Nicolas Tsiftes, Thiemo Voigt	Accurate Network-Scale Power Profiling for Sensor Network Simulators.	EWSN	2009	DBLP DOI BibTeX RDF
1	Zhong-Yi Jin, Rajesh K. Gupta	Improving the speed and scalability of distributed simulations of sensor networks.	IPSN	2009	DBLP DOI BibTeX RDF
1	Olaf Landsiedel, Georg Kunz, Stefan Götz, Klaus Wehrle	A virtual platform for network experimentation.	VISA	2009	DBLP DOI BibTeX RDF	network experimentation, simulation, deployment, resource virtualization
1	Bazara I. A. Barry	Intrusion detection with OMNeT++.	SimuTools	2009	DBLP DOI BibTeX RDF	intrusion simulation, performance evaluation, intrusion detection, OMNeT++
1	Pedro Velho, Arnaud Legrand	Accuracy study and improvement of network simulation in the SimGrid framework.	SimuTools	2009	DBLP DOI BibTeX RDF	network simulation
1	Paolo Barsocchi, Gabriele Oligeri, Francesco Potorti	Measurement-based frame error model for simulating outdoor Wi-Fi networks.	IEEE Transactions on Wireless Communications	2009	DBLP DOI BibTeX RDF
1	Zhong-Yi Jin, Rajesh Gupta	LazySync: A New Synchronization Scheme for Distributed Simulation of Sensor Networks.	DCOSS	2009	DBLP DOI BibTeX RDF
1	Xin Liu, Anwitaman Datta	Redundancy Maintenance and Garbage Collection Strategies in Peer-to-Peer Storage Systems.	SSS	2009	DBLP DOI BibTeX RDF	peer-to-peer storage-systems, redundancy maintenance, garbage collection, trace-driven simulations
1	James G. Haran, Abolfazl (Kouros) Mohammadian, Peter C. Nelson	Intelligent traveler assistant (ITA) simulation platform design.	MobiQuitous	2008	DBLP DOI BibTeX RDF	JIST, STRAW, SWANS, intelligent traveler assistant (ITA), micro simulation, multi-modal simulation, Java, MANET, wireless ad hoc networks, VANET, ns-2, traffic simulation, inter-vehicle communication
1	Ryad Ben-El-Kezadri, Farouk Kamoun, Guy Pujolle	XAV: a fast and flexible tracing framework for network simulation.	MSWiM	2008	DBLP DOI BibTeX RDF	on line analysis processing, trace file, XML, database, XQuery, network simulation
1	Eric W. Anderson, Caleb T. Phillips, Kevin S. Bauer, Dirk Grunwald, Douglas C. Sicker	Modeling directionality in wireless networks: extended abstract.	SIGMETRICS	2008	DBLP DOI BibTeX RDF	modeling, networking, wireless, directional, propagation, antenna
1	Rainer Bye, Stephan Schmidt, Katja Luther, Sahin Albayrak	Application-level simulation for network security.	SimuTools	2008	DBLP DOI BibTeX RDF	network security, network simulation
1	Chloé Rolland, Julien Ridoux, Bruno Baynat, Vincent Borrel	Using LiTGen, a realistic IP traffic model, to evaluate the impact of burstiness on performance.	SimuTools	2008	DBLP DOI BibTeX RDF	scaling behaviors, second-order analysis, performance evaluation, traffic generator
1	Elmar Schoch, Michael Feiri, Frank Kargl, Michael Weber	Simulation of ad hoc networks: ns-2 compared to JiST/SWANS.	SimuTools	2008	DBLP DOI BibTeX RDF	JiST/SWANS, simulation, comparison, ns-2
1	Philippe Owezarski, Pascal Berthou, Yann Labit, David Gauchard	LaasNetExp: a generic polymorphic platform for network emulation and experiments.	TRIDENTCOM	2008	DBLP DOI BibTeX RDF	experiments in real environment, realistic experiments, reproducible and controlled experiments, emulation, traffic generator
1	Shu Chen, Yingying Chen, Wade Trappe	Exploiting environmental properties for wireless localization.	Mobile Computing and Communications Review	2008	DBLP DOI BibTeX RDF
1	Wenbo He, Ying Huang, Klara Nahrstedt, Whay Chiou Lee	Alert propagation in mobile ad hoc networks.	Mobile Computing and Communications Review	2008	DBLP DOI BibTeX RDF
1	Philip Branch, Antonio L. Cricenti, Grenville J. Armitage	A Markov Model of Server to Client IP Traffic in First Person Shooter Games.	ICC	2008	DBLP DOI BibTeX RDF
1	Marco Aurélio Spohn, Paulo Sérgio Sausen, Fabiano Salvadori, Mauricio Campos	Simulation of Blind Flooding over Wireless Sensor Networks Based on a Realistic Battery Model.	ICN	2008	DBLP DOI BibTeX RDF	Blind Flooding, Sensor Networks, Battery Model
1	Paulo Sérgio Sausen, Marco Aurélio Spohn, Angelo Perkusich	Broadcast routing in Wireless Sensor Networks with Dynamic Power Management.	ISCC	2008	DBLP DOI BibTeX RDF
1	Philip Branch, Antonio L. Cricenti, Grenville J. Armitage	An ARMA(1, 1) prediction model of first person shooter game traffic.	MMSP	2008	DBLP DOI BibTeX RDF
1	J. Mark Belue, Stuart H. Kurkowski, Scott R. Graham, Kenneth M. Hopkinson, Ryan W. Thomas, Joshua W. Abernathy	Research and analysis of simulation-based networks through multi-objective visualization.	Winter Simulation Conference	2008	DBLP DOI BibTeX RDF
1	Zhong-Yi Jin, Rajesh Gupta	Improved Distributed Simulation of Sensor Networks Based on Sensor Node Sleep Time.	DCOSS	2008	DBLP DOI BibTeX RDF
1	Cinzia Bernardeschi, Paolo Masci, Holger Pfeifer	Early Prototyping of Wireless Sensor Network Algorithms in PVS.	SAFECOMP	2008	DBLP DOI BibTeX RDF	WSN algorithms, simulation, PVS
1	Arne Lie, Jirka Klaue	Evalvid-RA: trace driven simulation of rate adaptive MPEG-4 VBR video.	Multimedia Syst.	2008	DBLP DOI BibTeX RDF	Congestion control, Network simulation, Rate control, Streaming media, VBR video
1	David Johnson, Albert Lysko	Comparison of MANET Routing Protocols Using a Scaled Indoor Wireless Grid.	MONET	2008	DBLP DOI BibTeX RDF	IEEE 802.11 standard, wireless grid test bed, ad-hoc networks
1	Jörg Wallerich	Capturing the variability of internet flows in a workload generator for network simulators.		2007	RDF
1	Xu Su, Rajendra V. Boppana	On the impact of noise on mobile ad hoc networks.	IWCMC	2007	DBLP DOI BibTeX RDF	noise measurement, mobile ad hoc networks (MANETs), routing protocols, noise modeling
1	Moritz Killat, Felix Schmidt-Eisenlohr, Hannes Hartenstein, Christian Rössel, Peter Vortisch, Silja Assenmacher, Fritz Busch	Enabling efficient and accurate large-scale simulations of VANETs for vehicular traffic management.	Vehicular Ad Hoc Networks	2007	DBLP DOI BibTeX RDF	simulation, modeling, vehicular networks, traffic management
1	Antonio L. Cricenti, Philip Branch	ARMA(1, 1) modeling of Quake4 Server to client game traffic.	NETGAMES	2007	DBLP DOI BibTeX RDF	teletraffic analysis, simulation, traffic engineering, traffic modeling, online games, UDP, first person shooter
1	Kayo Fujiwara, Henri Casanova	Speed and accuracy of network simulation in the SimGrid framework.	VALUETOOLS	2007	DBLP DOI BibTeX RDF
1	Nicolas Letor, Peter De Cleyn, Chris Blondia	Enabling cross layer design: adding the MadWifi extensions to Nsclick.	VALUETOOLS	2007	DBLP DOI BibTeX RDF	MadWifi, Nsclick, click modular router, simulation, IEEE 802.11, cross layer design, NS-2
1	Ryad Ben-El-Kezadri, Farouk Kamoun	Graphic Visualization of the 802.11 DCF Protocol under the NS-2 Simulator.	Annual Simulation Symposium	2007	DBLP DOI BibTeX RDF
1	Sadaf R. Alam, Nikhil Bhatia, Jeffrey S. Vetter	Sensitivity Analysis of Biomolecular Simulations using Symbolic Models.	BIBE	2007	DBLP DOI BibTeX RDF
1	Félix Hernández-Campos, Kevin Jeffay, F. Donelson Smith	Modeling and generating TCP application workloads.	BROADNETS	2007	DBLP DOI BibTeX RDF
1	Antonio L. Cricenti, Philip Branch, Grenville J. Armitage	Time-series Modelling of Server to Client IP Packet Length in First Person Shooter Games.	ICON	2007	DBLP DOI BibTeX RDF
1	Giuseppe De Marco, Masaharu Tadauchi, Leonard Barolli	CAVENET: Description and analysis of a toolbox for vehicular networks simulation.	ICPADS	2007	DBLP DOI BibTeX RDF
1	Nuno M. Garcia, Przemyslaw Lenkiewicz, Mário M. Freire, Paulo P. Monteiro	On the Performance of Shortest Path Routing Algorithms for Modeling and Simulation of Static Source Routed Networks -- an Extension to the Dijkstra Algorithm.	ICSNC	2007	DBLP DOI BibTeX RDF
1	Siming Lin, Xueqi Cheng, Jianming Lv	A Visualized Parallel Network Simulator for Modeling Large-Scale Distributed Applications.	PDCAT	2007	DBLP DOI BibTeX RDF
1	Benjamin Mourllion, Sebastien Glaser	V2V Communication Analysis by a Probabilistic Approach.	VTC Spring	2007	DBLP DOI BibTeX RDF
1	Yan Zhang, Wei Wang, Shunying Lü	Simulating Trust Overlay in P2P Networks.	International Conference on Computational Science	2007	DBLP DOI BibTeX RDF	security, simulator, peer-to-peer, trust, overlay networks
1	Jaebok Park, Hyunwoo Joe, Hyungshin Kim	Automatic Power Model Generation for Sensor Network Simulator.	ICESS	2007	DBLP DOI BibTeX RDF	energy consumption estimation, sensor network, ubiquitous computing, embedded system, power model
1	Tiago Camilo, Jorge Sá Silva, André Rodrigues, Fernando Boavida	GENSEN: A Topology Generator for Real Wireless Sensor Networks Deployment.	SEUS	2007	DBLP DOI BibTeX RDF	Sensor Node Deployments, Simulators, Wireless Sensor Networks
1	Ruonan Zhang, Lin Cai	A Markov Model for Indoor Ultra-wideband Channel with People Shadowing.	MONET	2007	DBLP DOI BibTeX RDF	angular power spectrum density, UWB, channel model
1	Thomas Watteyne	Using Existing Network Simulators for Power-Aware Self-Organizing Wireless Sensor Network Protocols	CoRR	2006	DBLP BibTeX RDF
1	Arne Schmitz, Martin Wenig	The effect of the radio wave propagation model in mobile ad hoc networks.	MSWiM	2006	DBLP DOI BibTeX RDF	simulation, MANET, ray-tracing, photon map, physical layer
1	Philip Branch, Grenville J. Armitage	Extrapolating server to client IP traffic from empirical measurements of first person shooter games.	NETGAMES	2006	DBLP DOI BibTeX RDF	teletraffic analysis, games, traffic engineering, first person shooter
1	A. Karygiannis, E. Antonakakis, A. Apostolopoulos	Host-based network monitoring tools for MANETs.	PE-WASUN	2006	DBLP DOI BibTeX RDF	mobile ad hoc networks, routing algorithms, testbed, performance metrics, Linux Kernel
1	Songjie Wei, Jelena Mirkovic	A realistic simulation of internet-scale events.	VALUETOOLS	2006	DBLP DOI BibTeX RDF	distributed simulation, worms, simulation and modeling, invasive software
1	Erek Göktürk	Towards simulator interoperability and model interreplaceability in network simulation and emulation through AMINES-HLA.	Winter Simulation Conference	2006	DBLP DOI BibTeX RDF
1	Holger Füßler, Marc Torrent-Moreno, Matthias Transier, Roland Krüger, Hannes Hartenstein, Wolfgang Effelsberg	Studying vehicle movements on highways and their impact on ad-hoc connectivity.	Mobile Computing and Communications Review	2006	DBLP DOI BibTeX RDF
1	Zhengrong Ji, Junlan Zhou, Mineo Takai, Rajive Bagrodia	Improving scalability of wireless network simulation with bounded inaccuracies.	ACM Trans. Model. Comput. Simul.	2006	DBLP DOI BibTeX RDF	Simulation, optimization, scalability
1	Punit Rathod, Srinath Perur, Raghuraman Rangarajan	Bridging the Gap Between Reality and Simulations: An Ethernet Case Study.	ICIT	2006	DBLP DOI BibTeX RDF
1	Guoqiang Wang, Damla Turgut, Ladislau Bölöni, Dan C. Marinescu	Accuracy-Speedup Tradeoffs for a Time-Parallel Simulation of Wireless Ad hoc Networks.	LCN	2006	DBLP DOI BibTeX RDF
1	Dheeraj Reddy, George F. Riley, Bryan Larish, Yang Chen	Measuring and Explaining Differences in Wireless Simulation Models.	MASCOTS	2006	DBLP DOI BibTeX RDF
1	Wei Wang 0033, Guosun Zeng	A Generic Trust Overlay Simulator for P2P Networks.	PRDC	2006	DBLP DOI BibTeX RDF
1	Franck Legendre, Vincent Borrel, Marcelo Dias de Amorim, Serge Fdida	Modeling Mobility with Behavioral Rules: The Case of Incident and Emergency Situations.	AINTEC	2006	DBLP DOI BibTeX RDF
1	Sangjoon Park, In-Sook Cho, Byunggi Kim	An Evolution Process Model for the Internet Topology.	International Conference on Computational Science	2006	DBLP DOI BibTeX RDF
1	Peter Csaba Ölveczky, José Meseguer, Carolyn L. Talcott	Specification and analysis of the AER/NCA active network protocol suite in Real-Time Maude.	Formal Methods in System Design	2006	DBLP DOI BibTeX RDF	Real-time systems, Active networks, Formal analysis, Rewriting logic, Object-oriented specification, Multicast protocols
1	Francisco Javier Ridruejo Perez, A. Gonzalez, José Miguel-Alonso	TrGen: A Traffic Generation System for Interconnection Network Simulators.	ICPP Workshops	2005	DBLP DOI BibTeX RDF
1	Kumiko Maeda, Kazuki Sato, Kazuki Konishi, Akiko Yamasaki, Akira Uchiyama, Hirozumi Yamaguchi, Keiichi Yasumoto, Teruo Higashino	Getting urban pedestrian flow from simple observation: realistic mobility generation in wireless network simulation.	MSWiM	2005	DBLP DOI BibTeX RDF	simulation, mobile ad-hoc network, mobility model
1	Richard Fujimoto	Distributed Simulation of Vehicular Networks.	DS-RT	2005	DBLP DOI BibTeX RDF
1	Cristian Tuduce, Thomas R. Gross	A mobility model based on WLAN traces and its validation.	INFOCOM	2005	DBLP DOI BibTeX RDF
1	Sachin Ganu, Haris Kremo, Richard E. Howard, Ivan Seskar	Addressing Repeatability in Wireless Experiments using ORBIT Testbed.	TRIDENTCOM	2005	DBLP DOI BibTeX RDF
1	Michael Matthes, Holger Biehl, Michael Lauer, Oswald Drobnik	MASSIVE: An Emulation Environment for Mobile Ad-Hoc Networks.	WONS	2005	DBLP DOI BibTeX RDF
1	Matthias Wellens, Marina Petrova, Janne Riihijärvi, Petri Mähönen	Building a Better Wireless Mousetrap: Need for More Realism in Simulations.	WONS	2005	DBLP DOI BibTeX RDF
1	Ahmed Sobeih, Mahesh Viswanathan, Darko Marinov, Jennifer C. Hou	Finding Bugs in Network Protocols Using Simulation Code and Protocol-Specific Heuristics.	ICFEM	2005	DBLP DOI BibTeX RDF
1	Hiroyuki Ohsaki, Shinpei Yoshida, Makoto Imase	On Network Model Division Method Based on Link-to-Link Traffic Intensity for Accelarating Parallel Distributed Simulation.	ICN	2005	DBLP DOI BibTeX RDF
1	Zhengrong Ji, Junlan Zhou, Mineo Takai, Rajive Bagrodia	Scalable simulation of large-scale wireless networks with bounded inaccuracies.	MSWiM	2004	DBLP DOI BibTeX RDF	scalability, wireless network, discrete event simulation
1	Maneesh Varshney, Rajive Bagrodia	Detailed models for sensor network simulations and their impact on network performance.	MSWiM	2004	DBLP DOI BibTeX RDF	simulation, sensor network
1	George F. Riley, Mostafa H. Ammar, Richard M. Fujimoto, Alfred Park, Kalyan S. Perumalla, Donghua Xu	A federated approach to distributed network simulation.	ACM Trans. Model. Comput. Simul.	2004	DBLP DOI BibTeX RDF	Simulation, networks, distributed simulation
1	Ahmed Sobeih, Mahesh Viswanathan, Jennifer C. Hou	Check and simulate: a case for incorporating model checking in network simulation.	MEMOCODE	2004	DBLP DOI BibTeX RDF