World Metrology Day 2024

World Metrology Day 2024 is Measurement for Health

May 20 is World Metrology Day, commemorating the anniversary of the signing of the Metre Convention in 1875.

The theme for World Metrology Day 2024 is Sustainability.


10 Years JSR 363

10 Years JSR 363

Today marks the 10th anniversary of the JSR 363 approval.
Only 2 days before IoT Day 2024

Congratulations and thank you everyone who helped over all these years with JSR 363 and 385.


JSR 385 Maintenance Release 2

JSR 385 MR2

Today Maintenance Release 2 of JSR 385 was published by the Java Community Process: https://jcp.org/aboutJava/communityprocess/mrel/jsr385/index2.html

Corresponding GitHub release tags for API are: https://github.com/unitsofmeasurement/unit-api/releases/tag/2.2
for the RI: https://github.com/unitsofmeasurement/indriya/releases/tag/2.2
and for the TCK: https://github.com/unitsofmeasurement/unit-tck/releases/tag/2.2

Thanks everyone who helped with this release.


World Metrology Day 2023

World Metrology Day 2023 is Measurement for Health

May 20 is World Metrology Day, commemorating the anniversary of the signing of the Metre Convention in 1875.

The theme for World Metrology Day 2023 is Measurements supporting the global food system. This theme was chosen because of the increasing challenges of climate change, and global distribution of food in a world whose population reached 8 billion at the end of 2022.

Today the first artifacts of JSR 385 MR 2 were also released:
* uom-parent 2.2
* unit-api 2.2


Pi Day 2023

Pi Day Logo

Happy Pi Day 2023!
Pi Day is celebrated on March 14th (3/14) around the world. Pi (Greek letter “π”) is the symbol used in mathematics to represent a constant — the ratio of the circumference of a circle to its diameter — which is approximately 3.14159. Pi Day is an annual opportunity for math enthusiasts to recite the infinite digits of Pi, talk to their friends about math, and eat pie.

Check out Pi Day for more.


27th CGPM

CGPM

The General Conference on Weights and Measures (CGPM), at its 27th meeting,

recalling that decisions were made at previous meetings when it was considered timely to extend the range of SI prefixes including Resolution 12 (paragraph 3) adopted by the CGPM at its 11th meeting (1960), Resolution 8 adopted by the CGPM at its 12th meeting (1964), Resolution 10 adopted by the CGPM at its 15th meeting (1975), and Resolution 4 adopted by the CGPM at its 19th meeting (1991), decided to add to the list of SI prefixes to be used for multiples and submultiples of units the following prefixes:

Multiplying factor Name Symbol
1027 ronna

R

10–27 ronto

r

1030 quetta

Q

10–30 quecto

q

With an upcoming Maintenance Release 2 of JSR 385 we will add those new prefixes to MetricPrefix in the API.


Ada Lovelace Day 2022

Ada Lovelace

Happy Ada Lovelace Day 2022!
Ada Lovelace Day (ALD) is an international celebration of the achievements of women in science, technology, engineering and maths (STEM). It aims to increase the profile of women in STEM and, in doing so, create new role models who will encourage more girls into STEM careers and support women already working in STEM.

Check out Days of the Year.