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     on matters related to measurement science and measurement standards.
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BIPM news: BIPM highlights
    New BIPM website coming soon [2021]  
The new website has an updated design, expanded search engine, and personalized content. To set up your personal password, you'll need click on SIGN IN in the header, then on Password forgotten and enter your email address as registered in the BIPM Meetings Office database.
    The BIPM has signed a Memorandum of Understanding with the International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) [2020]  
The BIPM-IFCC Memorandum of Understanding was signed electronically by Dr Wynand Louw, President of the CIPM on 14 September 2020, and by Dr Khosrow Adeli, President of the IFCC on 15 September 2020.
    The BIPM and ITU formalized their long-standing cooperation through the signature of an MoU [2020]  
The BIPM-ITU Memorandum of Understanding was signed electronically by Dr Wynand Louw, President of the CIPM on 29 June 2020, and by Mr Mario Maniewizc, Director of ITU Radiocommunication Bureau on 30 June 2020.
    Impact of confinement measures in France on the BIPM site [2020]  
Following the plans announced by the French Government to progressively end its confinement measures, the BIPM site is opening again. Whilst many staff continue to work offsite and by telework, the number of staff active on the site is increasing.
Your contacts with BIPM staff continue through emails and telephone.
    First CMC submitted, reviewed, approved and published entirely using the KCDB 2.0 [2020]  
The BIPM KCDB office has published the first CMC that has been submitted, reviewed, approved and published entirely using the recently-launched KCDB 2.0.
    New instrument for comparing primary standards of pure β-emitting radionuclides [2020]  
Scientists from the BIPM have worked closely with colleagues from national metrology institutes in Germany, France, Poland, China and the UK to develop a new instrument that will enable metrology institutes to compare primary standards of pure beta-emitting radionuclides, reducing the need for complex and time-consuming multi-centre comparison exercises.
    BIPM Time Department provides additional information on the use of PSFS in UTC [2020]  
Starting from March 2020, the BIPM Time Department is providing additional graphical information concerning the use of Primary and Secondary Frequency Standards (PSFS) in UTC.
    Two-Way Satellite Time and Frequency Transfer: first use of a Software Defined Radio receiver in UTC calculation [2020]  
Two-Way Satellite Time and Frequency Transfer, improved by the Software-Defined Radio (SDR) receiver, has been used for Circular T calculation for the first time in March 2020.
    BIPM Kibble balance makes significant progress towards realizing the new kilogram definition in 2019 [2019]  
Significant progress towards the completion of the BIPM Kibble balance for realizing the new kilogram definition has been made in 2019. The BIPM will participate in the first key comparison of realizations of the new definition of the kilogram, CCM.M-K8.2019.
    BIPM frequency comb successfully installed by INTI [2019]  
INTI (Argentina) has successfully installed a frequency comb, which had been built by the BIPM for use in its former Length laboratory.
    The BIPM has signed a Memorandum of Understanding with the International Union of Pure and Applied Chemistry (IUPAC) [2019]  
Signed during the meeting of NMI Directors at the BIPM, the MoU formalizes the long-standing cooperation between the BIPM and IUPAC.
    Happy World Standards Day! [2019]  
Video standards create a global stage
Each year on 14 October, the members of the IEC, ISO and ITU celebrate World Standards Day, which is a means of paying tribute to the collaborative efforts of the thousands of experts worldwide who develop the voluntary technical agreements that are published as international standards.
    International comparison demonstrates accuracy of the global atmospheric CO2 measurement scale [2019]  
The accuracy of the updated carbon dioxide scale (WMO-CO2-X2019), the primary reference for the WMO-GAW monitoring network on which all global background observations of CO2 are based, was demonstrated in the key comparison (CCQM-K120). The results of the CCQM comparisons on CO2 in air standards were presented at the GGMT-2019.
    More accurate CO2 measurements thanks to isotopic analysis [2019]  
A recent publication from the BIPM demonstrates how the isotopic composition of CO2 in air standards can be used to correct precise spectroscopic measurements to achieve the accurate assignment of CO2 concentrations in air.
    Precision measurements in the search for signs of new physics with CERN's ATLAS detector [2019]  
The BIPM was very pleased to welcome Prof. Manuella Vincter from CERN, on 29 July 2019, to give a seminar on the ATLAS experiment, which is one of the largest and most complex scientific instruments ever constructed. The aim of the experiment is to study the fundamental properties of matter, leading to a better understanding of our world and the history of the universe.
    Venkatraman Ramakrishnan, Nobel Prize in Chemistry 2009, visits the BIPM Chemistry Department [2019]  
The BIPM Chemistry Department was honoured to host a visit from the Nobel Prize winner, Dr Venkatraman Ramakrishnan, on 7 March 2019.
    CRDS (Japan) delegation visits the BIPM on a fact-finding mission [2019]  
A delegation from the CRDS (Japan) visited the BIPM on 19 February 2019 on a fact-finding mission. The purpose of the visit was to better understand the activities of the BIPM and its role in the French science and technology landscape for inclusion in a forthcoming book.
    "One month to go" [2018]  
In one month's time on the 16th November the meeting of the General Conference on Weights and Measures (CGPM) will take place at the Palais des Congrès in Versailles. It will vote on the adoption of a Resolution that will redefine four of the seven base units of the SI.
    Happy World Standards Day! [2018]  
International Standards and the Fourth Industrial Revolution
Each year on 14 October, the members of the IEC, ISO and ITU celebrate World Standards Day, which is a means of paying tribute to the collaborative efforts of the thousands of experts worldwide who develop the voluntary technical agreements that are published as international standards.
    CCEM capacitance comparison successfully completed using a new scheme [2018]  
The CCEM-K4 key comparison of electrical capacitance calibrations has been successfully completed using the star scheme.
    Significant progress on the BIPM Kibble balance [2018]  
The Physical Metrology Department is pleased to announce that the BIPM Kibble balance has been operating continuously and reliably under vacuum since mid-2018. As a consequence of the recent improvements, the measurement uncertainty of the Planck constant has been reduced from the 10-6 to the 10-7 level.
    Thirty years of BIPM Circular T [2018]  
BIPM Circular T celebrates its 30th anniversary in 2018, having been published without interruption since 1 March 1988.
    Implementation of ISO/IEC 17025-2017 to be overseen by the BIPM's new QHSE Officer [2018]  
The BIPM has welcomed the publication of the third edition of the international standard ISO/IEC 17025-2017, "General requirements for the competence of testing and calibration laboratories" and has taken the first steps towards communicating its contents to its staff.
    Improved understanding of Kibble balance magnets [2018]  
The BIPM Kibble balance team reports, in two papers recently published in Metrologia, a detailed study of the effect of the coil-current on the magnetic field produced by the permanent magnet.
    Launch of the International Metrology Resource Registry [2018]  
See: http://imrr.bipm.org/
    Season's greetings from the BIPM [2017]  
Season's greetings from the BIPM and best wishes for 2018
    Dr Patrizia Tavella interviewed by RAI [2017]  
Dr Patrizia Tavella, our new Director of the BIPM Time Department, was interviewed by the Italian broadcasting company RAI.
    New edition of ISO/IEC 17025 just published [2017]  
The most popular standard for the competence of testing and calibration laboratories has just been updated, taking into account the latest changes in laboratory environment and work practices.
    Diabetes testing: Global efforts to standardize diagnosis and management [2017]  
Today, approximately 420 million people in the world have diabetes, a chronic disease that occurs in the two main types when the pancreas is no longer able to make insulin or when the body cannot make good use of the insulin it produces.
    BIPM-PTB lay groundwork for intercomparison of AC Josephson voltage standards [2017]  
Over the last decade, considerable research activity on alternating current (AC) quantum voltage references has been carried out to meet the demand for applied AC measurements in industry and in scientific research.
    150th Anniversary of the birth of Marie Curie [2017]  
Today, 7 November 2017, the BIPM is celebrating the 150th Anniversary of the birth of Marie Curie. Marie Curie and the BIPM have shared a common history and she visited the BIPM several times. The first international standard for ionizing radiation was prepared by Madame Curie and was placed at the BIPM in 1913. It was the basis of the international measurement system for about 50 years - the original KCRV.
    Evolving calibration hierarchies for diabetes diagnostics [2017]  
Improved measurements of C-peptide could lead to benefits for people with diabetes according to a report recently published in Clinical Chemistry.
    Happy World Standards Day! [2017]  
Standards make cities smarter Each year on 14 October, the members of the IEC, ISO and ITU celebrate World Standards Day, which is a means of paying tribute to the collaborative efforts of the thousands of experts worldwide who develop the voluntary technical agreements that are published as international standards.
    Agreement with the CEA List gives the BIPM access to the DOSEO platform for high-energy photon beams [2017]  
An agreement between the BIPM and the CEA List will allow the BIPM to operate the ongoing BIPM.RI(I)-K6 comparison for high-energy photon beams at the DOSEO platform for R&D in radiotherapy and imaging technologies.
    Standards to differentiate CO2 emission sources in the atmosphere [2017]  
Standards and methods to calibrate instruments that measure isotope ratios of carbon dioxide in air and operate in the infra-red, have been described in a recent publication in Analytical Chemistry.
    Reference measurement systems for novel biomarkers [2017]  
Methods developed at the BIPM for characterizing primary calibrators for the measurement of hepcidin, a major iron metabolism regulator, have been published in Analytical and Bioanalytical Chemistry.
    Are ozone concentrations in the atmosphere being underestimated? [2016]  
An article just published in Analytical Chemistry by the BIPM reports an independent value of the cross-section of ozone, which provides further evidence to suggest that the currently adopted conventional value of this quantity is too high, meaning that the reported ozone concentrations in the atmosphere are at present being underestimated.
    Time Department launches database and interactive tool for time scale contributors [2016]  
The BIPM Time Department has launched a new database and interactive tool for time scale contributors that is updated monthly with an inventory of laboratories that contribute to UTC and UTCr, their equipment and calibrations.
    Research improves the stability of timescale computation [2016]  
A paper entitled "A new approach to UTC calculation by means of the Kalman filter" has been published in Metrologia following a collaborative research project in the Time Department.
    Improved characterization of the BIPM secondary voltage standards used for bilateral comparisons [2016]  
The BIPM has improved the characterization of its secondary voltage standards used for bilateral comparisons of calibrations of Zener voltage standards (BIPM.EM-K11).
    First BIPM-NMIJ direct comparison of PJVSs at 10 V based on different technologies [2016]  
The BIPM's new transportable programmable Josephson voltage standard (PJVS) was used for the first time for an on-site comparison, at the NMIJ (Japan).
    How pure is your folic acid? BIPM qNMR facility supports organic reference material key comparisons [2016]  
Folic acid is the measurand for an organic purity comparison currently being coordinated by the BIPM. Twenty-two NMIs and expert laboratories are taking part and for the first time the BIPM qNMR facility was used in the development and characterization of the comparison material.
    Standards for monitoring atmospheric carbon dioxide [2016]  
Measurements of the amount fraction of CO2 in air standards, performed with cryogenic trapping, have been achieved at the BIPM. This represents an important milestone towards the establishment of the BIPM CO2-PVT measurement system, which will play a role in the CCQM-K120 key comparison for CO2 in air in 2016.
    New BIPM facility for brachytherapy and x-ray imaging [2016]  
A new facility has been designed and built at the BIPM to support the international comparison series in the field of brachytherapy, a radiotherapy treatment in which calibrated radioactive sources are positioned inside the patient.
    Update on the LISA Pathfinder mission [2016]  
The science mission of the LISA Pathfinder space mission is under way using test masses of a type that had their d.c. volume magnetic susceptibility measured by the BIPM.
    BIPM provided data for the LISA Pathfinder mission [2015]  
The BIPM provided essential magnetic susceptibility data for the proof masses aboard the LISA Pathfinder satellite, launched by ESA on 3 December 2015.
    Graphene-based QHE measurements [2015]  
The use of graphene to greatly simplify the quantum Hall effect (QHE) standard for electrical resistance calibrations is getting closer to reality. Read about the latest measurements at the BIPM.
    First comparisons of 18F activity using the SIR Transfer Instrument [2015]  
These successful comparisons took place in 2014 at the VNIIM, NPL and ENEA-LNMRI and their results were presented at the International Committee for Radionuclide Metrology (ICRM) conference in Vienna in June 2015.
    Presentations and webcast from the BIPM Carbon Workshop [2015]  
The webcast and presentations from the BIPM Workshop on Global to Urban Scale Carbon measurements, held on 30 June to 1 July 2015, are now available.
    Publication of new ozone cross-section measurements for the accurate monitoring of air quality [2015]  
New measurements of the ozone cross section carried out in the BIPM laboratories have been published with a relative standard uncertainty of 0.43 %, the smallest to date. Adoption of these new values would resolve differences between reference methods for surface ozone measurements.
    IPPP: a new technique to improve clock frequency comparisons [2015]  
A joint project between the BIPM, CNES and CLS has developed and tested the IPPP (PPP with integer ambiguity resolution) technique which will lead to a significant improvement in clock frequency comparisons using GPS signals.
    BIPM on-site comparison for radiation therapy dosimetry successfully uses new technology [2014]  
The BIPM carried out a joint comparison with the NPL, UK, and VSL, the Netherlands, in the NPL’s medical accelerator facility from 23 September to 20 October 2014. The BIPM used its transportable graphite calorimeter system to make a direct measurement of absorbed dose to water - a key quantity for traceability in radiation therapy - in three of the high-energy photon beams from 6 MV to 25 MV. The BIPM used a remote-controlled motorized monitoring and shutter system for the first time to reliably track and correct for intrinsic intensity variations in the beams. The new design is compact and demonstrated a high reproducibility in the positioning of the shutter.
    Best overall paper at the 2014 NCSLI Workshop and Symposium [2014]  
Nick Fletcher's paper, ‘Electrical Units in the new SI: Saying Goodbye to the 1990 Values,’ was selected as the best overall paper at the 2014 NCSLI Workshop and Symposium in Orlando, Florida. The extended paper has been published in the journal NCSLI Measure.
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