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Vibration Isolation of Precision Objects (2005) [pdf]

http://www.sandv.com/downloads/0607rivi.pdf
15•nill0•6d ago

Comments

Scene_Cast2•31m ago
Tangentially related - I was doing some highly sensitive analog electronics work. It's surprisingly hard to find capacitors that don't exhibit microphonic behavior - i.e. they don't produce (miniature) voltage swings when you tap the PCB.
lanthade•5m ago
Back 30 odd years ago I was doing work with a graduate/post graduate chem-e/material science group at the U of MN. I was working with a PhD candidate who was working on synthetic insulin. Part of the project was attempting to use a scanning tunneling microscope (STM) to image insulin at the molecular level. I hadn't ever done work with STM before and part of showing proficiency with the tool was to image Highly Oriented Pyrolytic Graphite (HOPG) at the molecular level. As you can imagine almost any vibration will show up when you're working on the scale where you measure in angstroms.

To solve for the vibration issue the STM lab was in the basement of the building and the STM equipment sat on a multi-ton granite block that was suspended from the ceiling of the building. The building sits in the center of the U of MN campus right next to a major roadway so there were lots of opportunities for vibrations to enter into the structure.

One of the coolest feelings was the day that I successfully imaged HOPG at the molecular level. To point at the image on screen and be able to say "That's a carbon atom!" is insanely cool. I didn't end up staying in chem-e but the experience of working in a real research lab with highly intelligent and creative people has impacted my life in numerous ways.

Stepping down as Mockito maintainer after 10 years

https://github.com/mockito/mockito/issues/3777
118•saikatsg•2h ago•34 comments

Software engineers should be a little bit cynical

https://www.seangoedecke.com/a-little-bit-cynical/
49•zdw•57m ago•25 comments

PySDR: A Guide to SDR and DSP Using Python

https://pysdr.org/content/intro.html
41•kklisura•2h ago•2 comments

Dolphin Progress Release 2512

https://dolphin-emu.org/blog/2025/12/22/dolphin-progress-report-release-2512/
11•akyuu•30m ago•0 comments

Growing up in “404 Not Found”: China's nuclear city in the Gobi Desert

https://substack.com/inbox/post/182743659
638•Vincent_Yan404•15h ago•280 comments

MongoBleed Explained Simply

https://bigdata.2minutestreaming.com/p/mongobleed-explained-simply
20•todsacerdoti•1h ago•3 comments

Remembering Lou Gerstner

https://newsroom.ibm.com/2025-12-28-Remembering-Lou-Gerstner
42•thm•3h ago•21 comments

Calendar

https://neatnik.net/calendar/?year=2026
912•twapi•17h ago•110 comments

Show HN: Pion SCTP with RACK is 70% faster with 30% less latency

https://pion.ly/blog/sctp-and-rack/
16•pch07•4h ago•1 comments

Building a macOS app to know when my Mac is thermal throttling

https://stanislas.blog/2025/12/macos-thermal-throttling-app/
194•angristan•10h ago•90 comments

Show HN: Phantas – A browser-based binaural strobe engine (Web Audio API)

https://phantas.io
8•AphantaZach•1h ago•2 comments

Doublespeak: In-Context Representation Hijacking

https://mentaleap.ai/doublespeak/
21•surprisetalk•6d ago•1 comments

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https://github.com/libriscv/libloong
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Replacing JavaScript with Just HTML

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660•soheilpro•21h ago•248 comments

Loss of moist broadleaf forest in Africa has turned a carbon sink into source

https://www.nature.com/articles/s41598-025-27462-3
33•PaulHoule•1h ago•5 comments

Learn computer graphics from scratch and for free

https://www.scratchapixel.com
129•theusus•11h ago•15 comments

One year of keeping a tada list

https://www.ducktyped.org/p/one-year-of-keeping-a-tada-list
199•egonschiele•6d ago•56 comments

Global Memory Shortage Crisis: Market Analysis

https://www.idc.com/resource-center/blog/global-memory-shortage-crisis-market-analysis-and-the-po...
64•naves•6h ago•59 comments

Oral History of Richard Greenblatt (2005) [pdf]

https://archive.computerhistory.org/resources/text/Oral_History/Greenblatt_Richard/greenblatt.ora...
4•0xpgm•3d ago•0 comments

John Malone and the Invention of Liquid-Based Engines

https://permalink.lanl.gov/object/tr?what=info:lanl-repo/lareport/LA-UR-93-1350-25
3•akshatjiwan•4d ago•0 comments

The Prison of Financial Mediocrity

https://twitter.com/systematicls/status/2004900241745883205
31•zuhayeer•1h ago•5 comments

Langfuse (YC W23) Is Hiring in Berlin, Germany

https://langfuse.com/careers
1•clemo_ra•10h ago

Vibration Isolation of Precision Objects (2005) [pdf]

http://www.sandv.com/downloads/0607rivi.pdf
15•nill0•6d ago•2 comments

Designing Predictable LLM-Verifier Systems for Formal Method Guarantee

https://arxiv.org/abs/2512.02080
46•PaulHoule•7h ago•8 comments

Floor796

https://floor796.com/
973•krtkush•1d ago•114 comments

2D Signed Distance Functions

https://iquilezles.org/articles/distfunctions2d/
64•nickswalker•3d ago•8 comments

Keep the Robots Out of the Gym

https://danielmiessler.com/blog/keep-the-robots-out-of-the-gym
8•Group_B•28m ago•3 comments

Rex is a safe kernel extension framework that allows Rust in the place of eBPF

https://github.com/rex-rs/rex
133•zdw•5d ago•60 comments

How we lost communication to entertainment

https://ploum.net/2025-12-15-communication-entertainment.html
643•8organicbits•1d ago•359 comments

We "solved" C10K years ago yet we keep reinventing it (2003)

https://www.kegel.com/c10k.html
95•birdculture•2d ago•58 comments