Annus Mirabilis 4: E=mc²

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121 years ago, on September 27th, 1905, the fourth and final Annus Mirabilis paper by Albert Einstein was published. In it Einstein presented a groundbreaking idea to the scientific world: energy (E) and mass (m) are interchangeable. They are both different manifestations of the same thing and can convert into each other.

This concept was quite revolutionary at that time.

Described in the world’s most famous equation: (E=mc²), it changed the way we view the Universe.


Eclipse UOMo Graduation

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Today Eclipse UOMo successfully finished its Graduation Review from the Incubator.

Thanks everyone who was involved and contributed to either UOMo or the underlying Units of Measurement modules.


World Metrology Day 2025

World Metrology Day 2025 is Measurements for all times, for all people

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

This year, we celebrate the 150th anniversary of the signing of the Metre Convention - a milestone that underscores a century and a half of international collaboration in measurement science. Also the OIML, the International Organization of Legal Metrology, turns 70 on October 12th this year.

The theme for World Metrology Day 2025 is Measurements for all times, for all people.

We also released version 2.2.2 of SI Units.


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