Over-the-Top Programmable Resistor Looks the Part and Performs - Every once in a while we get wind of a project that we’re reluctant to write up fo... - https://hackaday.com/2023/08/18/over-the-top-programmable-resistor-looks-the-part-and-performs/ #programmable #toolhacks #metrology #precision #resistor #decade #stm32 #scpi

@joshg @alexhaist Why are we still propagating the insanity that is π?! 15 minutes is one quarter τ (tau)—if using an hour as your “rotational period”. (Everywhere you see 2π, think: someone should have used τ!)

It’s like picking furlongs per fortnight as your preferred unit to measure the speed of light. (1.803 megafurlongs per microfortnight, FYI. One furlong per fortnight being roughly equivalent to the speed of a snail.)

#metrology #science

It’s #sensorsunday and this weekend I finally got to use my DIY thermal chamber 😃
Along with a Fluke thermocouple meter it turned out really good 👍🏼

Doing temperature test on the 1M #vintage reference resistor - it’s big and heavy, so I left it to soak at the wanted temperature for at least 8hrs, continuously monitoring chamber and device temperature.

Testing at 10,20 and 40C, I found a slightly negative temperature coefficient, but still well inside the 0.02% specification.

My measurements are a bit lower altogether compared with my initial test where I saw precisely 1M. This is due to coupling between the test wires, when entering the thermal chamber. It’s really hard to avoid, even giga-ohms in parallel, will affect the result.

#testandmeasurement #electronics #metrology #electronicsengineering #engineer #fluke #sourcemeasureunit #keithley #keithleyinstruments

Well that’s close enough for the specified 0.02% 😳 Job well done for a 1974 device 💪🏼🙂 #electronics #testandmeasurement #metrology #electronicsengineer

We are very happy to welcome J. Daniel Prades as Alexander von Humboldt Professor at #TUBraunschweig! 🤗The expert in nanophotonics from the University of Barcelona will receive Germany's most prestigious #research award of five million euros. 👏
👉 https://youtu.be/Rwe8aMU6yBM
#AvHProfessor #Metrology #QuantumFrontiers #QuantumValleyLowerSaxony

@HumboldtStiftung

In 1742, Anders Celsius redesigned Delisle’s recalibrated temperature scale, and named it the centigrade scale, now reversed and called the Celsius scale. #Poetry #Science #History #Temperature #Metrology #Thermometry #Celsius (https://sharpgiving.com/thebookofscience/items/p1742.html)

Doing some restoration of my #ludlum #model2a survey meter. The local discount store has these spray cans of acrylic primer and varnish. They dry very quickly, especially outside in the open air. I did the removable bottom, the meter face and as a test the small cover of the calibration pots.
I am going to repaint and relabel the front too but I am leaving the battery cover as is because I don't want to erase its origin ❤️ #radioactivity #metrology

The Royals, metrology and the sacred landscape of Britain - Robin Heath explains why the Queen's laying in state at St Giles Cathedral in Edinburgh was so significant. #Metrology #Geomancy #Sacred
https://robinheath.info/royal-sacred-landscape-geometry/#more-866

Wow, Bunnings must count the individual electrons and quarks in their plywood! I've never seen a product quoted to this level of precision - I wonder what would happen if a disgruntled customer went all legal about it being over or under the advertised weight 🤔😂

#Bunnings #accuracy #measuring #metrology

📏 #metrology

Interesting metrological data

“Accuracy of Manual Intracranial Pressure Recording Compared to a Computerized High-Resolution System”
https://pubmed.ncbi.nlm.nih.gov/36922475/

#NeuroCritCare #CriticalCare #Metrology #Physiology

"I have measured the force of a laser beam hitting something" is maybe one of the most rare achievements one can get. I never thought that this would be possible. Absolutely amazing. (rha) #Veritassium #NIST #Metrology

https://yewtu.be/pXoZQsZP2PY

Hackaday Links: March 5, 2023 https://hackaday.com/2023/03/05/hackaday-links-march-5-2023/ #coordinatemeasuringmachine #HackadayColumns #Hackadaylinks #hackadaylinks #cryptomining #infotainment #repossession #self-driving #metrology #standards #illegal #illicit #youtube #Slider #patent #brick #pixel #Xerox #alto #ford #nist #parc #CMM

Hackaday Links: March 5, 2023 - Well, we guess it had to happen eventually — Ford is putting plans in place to mak... - https://hackaday.com/2023/03/05/hackaday-links-march-5-2023/ #coordinatemeasuringmachine #hackadaycolumns #hackadaylinks #cryptomining #infotainment #repossession #self-driving #metrology #standards #illegal #illicit #youtube #slider #patent #brick #pixel #xerox #alto #ford #nist #parc #cmm

Perfect (calibrated) mix 🍸👌🏻😂 #fluke #metrology #testansmeasurement #electronics #saturday #cocktail #cocktailhour

There’s no room for downtime or inaccuracies when it comes to optical manufacturing. #Interferometers improve your #metrology capabilities so you can build capabilities and meet your customers’ demands. Learn more: https://ilphotonics.com/perform-fast-accurate-surface-and-wavefront-measurements/

Cool video on making lapping plates using a modified 3 plate method with only two plates and a spherometer

https://www.youtube.com/watch?v=kXfP0eUrgM4

#machining #lapping #metrology

RT @qmisanz@twitter.com

A 3-year #Postdoc position at @BCAMBilbao@twitter.com with Jean Bernard Bru and I on mathematical aspects of quantum information (#QuantumComputation, #algorithms or #metrology)

http://www.bcamath.org/en/research/job/ic2023-01-postdoctoral-fellowship-in-mathematics-of-quantum-many-body-problems-and-quantum-information-science

Soon another 2-year position with Luis Vega on #QuantumChannels and #TensorNetworks.

🐦🔗: https://twitter.com/qmisanz/status/1618687862328934400

What time is it on the Moon?

by Elizabeth Gibney

The coming decade will see a resurgence in lunar exploration — including dozens of missions and plans to establish permanent bases on the Moon. The endeavours pose myriad challenges. Among them is a subtle, but fundamental, question that metrologists worldwide are working to answer: what time is it on the Moon?

https://www.nature.com/articles/d41586-023-00185-z

#moon #metrology #time #space #exploration

It took a 'little' longer than expected but the #IUPAC #BIPM #Metrology paper on Methods for the SI-traceable value assignment of the purity of organic compounds (IUPAC Technical Report) has been published - Read on degruyter.com/document/doi/1… @degruyter_pub