Welcome to LIMSI
We share a common long-term goal, which is to improve the well-being of man in their surrounding environment, both from a material and immaterial point of view.
- Fluid Mechanics, with an expertise in the development of advanced numerical methodologies associated to experiments in academic configurations (AERO and ETCM)
- Energetics and the study of Mass and Heat Transfer with fundamental research related to applied context (ETCM and TSF)
- Natural Language Processing, applied to spoken, written, and signed languagetual ranging from acoustic signal processing to semantic modeling (TLP, ILES and AA)
- Human-Machine Interaction aiming at a deeper understanding and model of interactions in various contexts and along various modalities, including Virtual and Augmented Reality (AMI, CPU, VENISE and AA)
Audio and Acoustics
Sound is one of the moste widely used means of human interaction and communication. Human-produced sounds (speech, music, and other expressive vocalizations), human sound perception, and sonic environments are studied in the Audio Acoustics Group (AA).
These different sciences and technologies of sound are investigated along three main lines, corresponding to the research themes within the group: Audio Analysis and Synthesis, Expressive Prosody, and Soud & Space.
Unsteady Aerodynamics: Turbulence and Control
The simulation of realistic flows and analysis of experimental or numerical databases for geophysical, industrial or biological applications requires the development of numerical methods. The AERO group develops fundamental research on advanced numerical methods in the context of high performance computing (HPC). This work has led to the development of original methods for flow analysis, prediction and control.
Achitecture and Models for Interaction
The emergence in recent years of new classes of users, new software and hardware platforms and new interaction environments and contexts (mobility) has shifted our attention from static interaction situations to open and dynamic ones. This is the reason why the AMI group focuses on post-WIMP interaction paradigms where the hands on experience of the physical world is important, such as tangible user interfaces to manipulate physical objects, tactile surfaces, or 3D interactions. Besides, ambient environments and augmented reality spaces provide the designers of new interfaces with new modalities and new requirements, thus enriching the traditional issues in multimodal interfaces.
Cognition, Perception and Uses
The goal of the CPU group (Cognition, Perception, Use) is to conduct pluridisciplinary research with the joint perspective from Psychology, Ergonomics and Computer Science in order to address research questions about (or that can be useful for) the design or evaluation of Human-Computer Interaction.
Transitional Flows and MultiPhysics Couplings
Information, Written and Signed Language
ILES specifically addresses the analysis, understanding and production of written language, and the modelling and production of signed language. Natural language processing aims to process human language in such a way that the results of this processing make sense for humans, i.e., meet their expectations. It aims to design computer programs that can understand or emulate human communication, e.g. by analysing documents and extracting task-relevant information, helping in the production of documents (spell checkers, style checkers, controlled language editors), generating a whole document (text summarizer), or answering questions based on text or more structured content.
Spoken Language Processing
The Spoken Language Processing group carries out research aimed at understanding the human speech communication processes and developing models for use in automatic processing of speech. With the aim of extracting and structuring information in audio documents, the group develops models and algorithms that use diverse sources of information to carry out a global decoding of the signal, that can be applied to identify the speaker, the language being spoken and the speaker affective state, to transcribe the speech or translate it, or identify specific entities. This research is by nature interdisciplinary, drawing upon expertise in signal processing, acoustic-phonetics, phonology, semantics, statistics and computer science.
The specificity of the Solid-Fluid Transfer group relies in its know-how in Heat transfer and Energetics. In the broad field of Heat transfer and Energetics, which is constantly revisited by new experimental techniques (e.g. optical velocimetry), new materials, or new challenges (e.g. micro- and nano-scales), the Solid-Fluid Transfer group explores four domains:
- Two-phase flows, dynamics and transfers,
- Oscillating flows, dynamics and transfers,
- Heat transfer in solid/superfluid and in micro-nano junctions
- Applied convective transfers and Solar energies
VENISE is the Virtual & Augmented Reality (V&AR) research team of the CNRS/LIMSI lab. Our research aims at developing methods and tools to make immersive and collaborative interactions more "natural" or more intuitive, either in virtual worlds or in virtual worlds coupled to the real one. We strive at making our models generic enough so that they apply to a large range of immersive environments, such as collaborative (RAVE, CAVE, Workbench ...), individual (HMD, see-through ...), or multi-sensorimotor (stereoscopic, 3D audio, haptic ).
Virtuality, Interaction, Design & Art
VIDA (Virtuality, Interaction, Design, & Art) is a transverse action at LIMSI supporting and promoting collaborations between engineering sciences and creative domains of contemporary arts (visual arts, dance, music, theater, and performance) including also design and architecture. VIDA activities gather members of various groups at LIMSI.