Hacker News with Generative AI: Measurement

Optical Frequency Combs (nist.gov)
Optical frequency combs are specialized lasers that act like a ruler for light. They measure exact frequencies of light — from the invisible infrared and ultraviolet to visible red, yellow, green and blue light — quickly and accurately.

Lasers, Physics, Optics, Measurement

126 points by zafka 22 days ago | 40 comments

Laser technique measures distances with nanometre precision (newscientist.com)
A new way to gauge distance using lasers can measure lengths of more than 100 kilometres to within a thousandth of the width of a human hair, and could be used to make better space telescopes.

Science, Technology, Measurement, Lasers, Space

39 points by westurner 39 days ago | 20 comments

Measuring hardware overhang (2020) (lesswrong.com)
How can we measure a potential AI or hardware overhang? For the problem of chess, modern algorithms gained two orders of magnitude in compute (or ten years in time) compared to older versions.

Artificial Intelligence, Hardware, Measurement, Computing

10 points by philipswood 67 days ago | 1 comments

How to measure frequency response of a speaker at home (crabman.me)
Short answer: no, Soundcore Motion+ sounds the same via bluetooth and aux-in.

Audio Engineering, Speakers, Measurement, DIY

57 points by philip-b 75 days ago | 57 comments

The Revised SI of physical units (2019), Max Planck (1900), and 'Planck scale' (osf.io)

Physics, Measurement, History, Science

35 points by mike_ivanov 84 days ago | 6 comments

Show HN: Weave - actually measure engineering productivity (workweave.ai)
Welcome to Weave

Software, Engineering, Productivity, Measurement, Tools

22 points by adchurch 93 days ago | 39 comments

Measuring keyboard-to-photon latency with a light sensor (2023) (thume.ca)
For a long time when I’ve wanted to test the latency of computers and UIs I’ve used the Is It Snappy app with my iPhone’s high speed camera to count frames between when I press a key and when the screen changes. However the problem with that is it takes a while to find the exact frames you want, which is annoying when doing a bunch of testing.

Software, User Interface, Measurement, Testing, Hardware

30 points by ossusermivami 109 days ago | 12 comments

Cannot Measure Productivity (2003) (martinfowler.com)
We see so much emotional discussion about software process, design practices and the like. Many of these arguments are impossible to resolve because the software industry lacks the ability to measure some of the basic elements of the effectiveness of software development. In particular we have no way of reasonably measuring productivity.

Software Development, Productivity, Measurement, Software Industry

34 points by aard 109 days ago | 11 comments

Gauge Block (wikipedia.org)
Gauge blocks (also known as gage blocks, Johansson gauges, slip gauges, or Jo blocks) are a system for producing precision lengths.

Engineering, Measurement, Tools

17 points by sandwichsphinx 119 days ago | 1 comments

BMI-type measure for a place's "goodness of weather" (ycombinator.com)

Weather, Climate, Data Science, Measurement

7 points by profsummergig 122 days ago | 17 comments

Using Euro coins as weights (2004) (rubinghscience.org)
Here is a cheap way to obtain a set of standard weights, for measuring weights up to about 100 gram, to an accuracy of about 0.5 gram : Use the coins of the currency of your country. Thus one can make use of the fact that these coins are fabricated in mass production, and because of that have not only a constant shape and size, but also a constant and accurately fixed weight.

DIY, Science, Measurement, Currency

183 points by Tomte 124 days ago | 185 comments

Linear Variable Differential Transformer (LVDT) Basics (te.com)
LVDTs provide reliable position measurement for applications in subsea, power generation, industrial automation, aerospace, test and measurement, and more.

Sensors, Engineering, Measurement, Automation

82 points by userbinator 136 days ago | 18 comments

Actual Size Online Ruler (Mm,Cm,Inches) – Screen Measurements (ginifab.com)
This is a convenient online ruler that could be calibrated to actual size, measurements in cm, mm and inch, the upper half is the millimeter ruler and centimeter ruler, the lower half is an inch ruler.

Tools, Online Tools, Measurement, Web Development

51 points by riggedrauller 165 days ago | 16 comments

MOA Meaning: Minute of Angle Explained – RifleShooter (rifleshootermag.com)

Riflery, Shooting, Firearms, Measurement, Technology

7 points by lifeisstillgood 169 days ago | 1 comments

Reading my electric meter with RTLSDR (pdx.su)

RTLSDR, Electronics, DIY, Radio, Measurement

31 points by squidhunter 226 days ago | 11 comments

Measure Schools on Student Growth (brettcvz.com)

Education, Evaluation, Measurement

11 points by brettcvz 265 days ago | 17 comments

120cm to inches (google.com)