L’émergence d’une métrologie quantique a permis de rattacher toutes les unités de base à des constantes fondamentales de la physique. Un nouveau système d’unités a donc été proposé à la Conférence Générale des Poids et Mesures de novembre 2018 qui supprime en particulier le kilogramme étalon matériel des unités de base. Cette évolution permet de garantir une universalité, une pérennité et une meilleure reproductibilité des mesures. Le choix des constantes va assurer une cohérence au nouveau système fondé essentiellement sur les progrès de l’interférométrie atomique et de la métrologie électrique quantique. Les développements de ces disciplines et leurs applications en métrologie seront discutés au cours de cette séance.
Conférence-débat de l’Académie des sciences, le 4 décembre 2018 de 14h30 à 16h45, dans la Grande salle des séances de l’Institut de France : “Le nouveau système international d’unités (SI) fondé sur un choix de constantes physiques fondamentales”.
Christian Bordé et Christophe Salomon – de l’Académie des sciences
Christian Bordé, de l’Académie des sciences
Pierre Cladé, du Laboratoire Kastler Brossel (LKB), groupe Metrology of Simple Systems and Fundamental Tests
Wilfrid Poirier du Laboratoire national de mtrologie et d’essais (LNE), pôle de métrologie électrique
Sébastien Bize, Systèmes de référence temps-espace (SYRTE), équipe métrologie des fréquences optiques
The Precise Time and Time Interval Systems and Applications (PTTI) meeting is an annual conference sponsored by ION with a technical program designed to disseminate and coordinate PTTI information at the user level, review present and future PTTI requirements, inform government and industry engineers, technicians, and managers of precise time and frequency technology and its problems, and provide an opportunity for an active exchange of new technology associated with PTTI.
In 2019, PTTI will be co-located with the ION International Technical Meeting, in Reston, Virginia.
A commercial exhibit and pre-conference tutorials are held in conjunction with the conference.
Tutorials will be offered on January 28; technical sessions will take place January 29-31.
- Alternative Techniques in Time Dissemination
- Fiber Link Time Transfer
- GNSS Time and Frequency Transfer
- Ground Based Time and Frequency Transfer
- Laboratory Reports and Activities
- Next Generation Clocks
- PTTI Applications in Space
- Space and Terrestrial Clocks
- Time Scales and Algorithms
- Timing Applications in Financial Markets
Abstracts due October 10, 2018
The Workshop on Synchronization and Timing Systems (WSTS) is approaching 30 years of bringing together leading experts to discuss the latest timing and synchronization topics. Over this period, time synchronization has evolved from a niche application to an underpinning technology across Power, Telecommunication, Finance and many other industries and applications.
WSTS has tracked and helped the evolution of precision timing over these decades. This has allowed experts to meet and offers the opportunity to explore cross-industry innovation, as an array of timing technologies become increasingly essential to many sectors.
We particularly welcome presentations offered by the users of synchronization, especially new innovations/applications which provide an important perspective on the needs for timing and on related challenges.
For submitting a Presentation abstract, you will find that we seek either those that are relevant to a specific sector or technology area, and those that are sector independent.
Sector-related talks must choose:
- Telecom (e.g., 5G)
- Electric Grid/Power Industry
- Financial Services
- Cyber-Physical Systems (Industrial Internet, Factory Automation, Computing,
Sensor Data Fusion)
- Broadcasting and Multi-Media
For sector independent talks choose:
- Sources of Timing: GNSS, Network Links, Oscillators (Atomic, Qu, MEMS, Other)
- Timing Security/ Assured Timing
- Measurement/ System Validation
Presenting at this event positions your ideas in front of the top professionals in the timing and sync community. Please submit an abstract no later than Friday, October 5, 2018, to have your concepts considered.
It is our pleasure to announce the second meeting centered around the GNU Radio framework held in France (Besancon). This workshop targets French and European GNU Radio users and developers. Contributions are sought in English.
The workshop will take place on the 17th and 18th June, 2019, at the ENSMM engineering school facilities, Besancon – France (see last year’s program to get a hint of addressed topics).
Submissions open at https://gnuradio-fr-19.sciencesconf.org/
Registration will open January 1st 2019.
GNU Radio is an increasingly popular framework for Software Defined Radio components and Digital Signal Processing prototyping. As such our goals are as follows:
- Bring together active French and European GNU Radio users, coming from a scientific, technical, amateur or hacker background
- Foster interaction between GNU Radio users
- Share knowledge about GNU Radio development through tutorials, seminars and demos
- Bridge the gap between technical/engineering and scientific/research points of view on topics related to applied research with GNU Radio. Such topics include:
- Software Defined Radio, radio prototyping,
- RF design,
- RADAR design
- Signal processing in embedded systems,
- GNU Radio development environment,
- New platforms
GNU Radio users and developers are invited to present their experiments and activities. The first day (17th of June) will be devoted to oral presentations, posters and demonstrations. The second day (18th of June) will be dedicated to tutorials and hands-on sessions.
Contributions might for instance address the following topics (but not limited to):
- Cognitive Radio, Digital Communication and Agile Spectrum Sharing
- RADAR systems and specifically passive radar
- Front-end analog characterization
- Design of Signal Processing algorithms as GNU Radio blocks
- Identification and decoding of signals, including satellite communication systems
- Security aspects of Radiocommunications
- Coupling GNU Radio to Soc FPGA
- Various physical measurements (GNSS, Radioastronomy)
- … your own favorite field here