HN user

dandelany

5,258 karma

developer at NASA/JPL, formerly Spotify, Seed Scientific, Enigma, Turntable.FM. http://www.cognitiveharmony.net

Posts32
Comments1,047
View on HN
dandelany.github.io 10y ago

Show HN: Vector Toy – Visualize and manipulate vector field functions

dandelany
43pts4
www.huffingtonpost.com 10y ago

Spotify announces six-month paid parental leave for all full-time employees

dandelany
7pts0
forum.nasaspaceflight.com 10y ago

New test of EmDrive – errors mitigated, anomalous thrust remains

dandelany
4pts0
www.planetary.org 11y ago

New Horizons enters safe mode 10 days before Pluto flyby

dandelany
154pts47
facebook.github.io 11y ago

React Native v0.4

dandelany
109pts36
ufoym.com 11y ago

Face-aware Image Cropping

dandelany
22pts5
blog.enigma.io 11y ago

Mike Flowers, Former NYC Chief Analytics Officer, Joins Enigma

dandelany
13pts1
www.sei.aero 11y ago

Optimization of Reusable Rocket-Powered, VTVL Launcher: Case Study of Falcon 9-R [pdf]

dandelany
3pts0
labs.enigma.io 12y ago

U.S. Daily Temperature Anomalies 1964-2013

dandelany
206pts56
developer.github.com 12y ago

Github Deployments

dandelany
1pts0
badchemistry.wbur.org 12y ago

With More Work, Less Time, Dookhan’s Tests Got Faster

dandelany
1pts0
www.billboard.com 12y ago

Rap Genius and Sony/ATV Reveal Licensing Deal

dandelany
2pts0
www.businessinsider.com 12y ago

The Whole Government Shutdown In One Simple, Beautiful Chart

dandelany
2pts0
ltvsquad.com 13y ago

Chinatown Subway Party: What Comes Next?

dandelany
1pts0
thenextweb.com 13y ago

Turntable launches Piki: radio-style streams curated by friends

dandelany
3pts0
evolver.fm 13y ago

Data Visualizations: How Songs Go Viral on Turntable.fm

dandelany
3pts0
blog.turntable.fm 13y ago

Show HN: "Spread the Love," my turntable.fm hack day project

dandelany
1pts0
techcrunch.com 13y ago

Meet Turntable(.fm)’s Piki, The First Music App To Do Social Music Sharing Right

dandelany
5pts0
www.nytimes.com 13y ago

The Conversion of a Climate-Change Skeptic

dandelany
16pts3
arstechnica.com 14y ago

Maxis announces new SimCity for 2013

dandelany
5pts0
gigaom.com 14y ago

Turntable.fm grabs $7 million, releases iPhone app

dandelany
2pts0
wecreatemusic.ascap.com 15y ago

Hot New Music Site Turntable.fm Is Licensed by ASCAP

dandelany
1pts0
awesome.good.is 15y ago

Cooking Flowchart: How to Cook Real Good Cheap Easy Food

dandelany
2pts1
www.cs.cornell.edu 16y ago

SIGGRAPH: Rigid-Body Fracture Sound Experiments

dandelany
4pts1
www.huffingtonpost.com 16y ago

Colbert & Daily Shows removed from Hulu, effective today

dandelany
16pts4
www.faqs.org 16y ago

K.R. Sridhar's "Bloom Box" patent application?

dandelany
2pts0
www.eod.com 16y ago

The Days of Miracle and Wonder - a story about cynicism

dandelany
1pts0
www.cnn.com 16y ago

CNN's 360° video of Port-au-Prince

dandelany
8pts3
www.pehub.com 17y ago

The Systemic Risk of Venture Capital

dandelany
2pts0
www.baekdal.com 17y ago

Where is Everyone? A history and future of information technologies

dandelany
8pts1

People used to do a lot of stupid stuff. If you live alone and are conscious of the risk, sure, this is not a terribly dangerous item if you're safe about it. If you live with pets or children, it's entirely sensible to be concerned about the risk. A mercury spill can seep between the floorboards and contaminate your house with volatile mercury vapors for years to come if not properly managed.

AirPods Max 2 4 months ago

Sure, plenty of people also wear a 14 oz hard hat strapped to their head all day with no negative health impacts. Doesn't mean it's enjoyable or comfortable for everyone.

This was once common but is exceedingly rare these days. I'm sure exceptions exist, but nearly all Americans now treat this as a Very Secret Number.

"Simple stochastic blob detection" is an abstraction. You write (or import) a function where the the gnarly logic lives and call `detectBlobs()`. "Use an abstraction" doesn't mean you should use the same abstraction for every task, you should use the right tool for the job.

He didn't "do it", he was one voice among many astronomers who have been calling for a reclassification for years, the IAU voted and made the decision. It's a little silly calling him out for "doing it" for ego reasons when you are the one implicitly giving him credit for it... He didn't write the definition, he didn't chair the committee, he wasn't even on the committee. All he did was leave it off the list of planets at the Hayden Planetarium, where he was director.

ChatGPT Is Down 2 years ago

Guessing these are the folks that can’t get work done because GPT is down…

There is at least one area where ATtiny still outcompetes RP2040: low power consumption. Even in its lowest-power dormant state, 2040 still burns around 200uA, whereas the ATTiny can sleep on only a handful of uA or less. Even during active use, an ATtiny with low voltage supply and low frequency clock can often do what you need with an order of magnitude or two less power than a 2040. So for a hobbyist project to build a battery-powered device with long lifetime, it’s hard to beat the ATtiny. Otherwise I completely agree!

Also not that long ago electricity and clean drinking water weren't a thing. The fact that people can make a career as an artist now, and couldn't before, is something I'd consider an advancement! "Nothing wrong with that" is a conclusion that simply doesn't follow from the rest of your post.

Excitingly, the next version of Minecraft will have a single block (Copper Bulb) that effectively works as a redstone T-flip-flop! Previously it has always required a handful of other blocks to implement one.

Imagine scientists discovered colonies of ants that compose elaborate symphonies of music that they perform for each other. Two problems: they’re small, so the music is quiet. And for the same reason, it’s extremely high-pitched and just sounds like mouse squeaks. In fact, half of it is ultrasonic, above the range of human hearing.

Which device is more impressive and would garner more public support for the project: an amplifier which just makes the squeaks louder? Or one which also pitches down the squeaks into a range where we can actually perceive and appreciate the tune & dynamics of the underlying music?

Wow, Nuts and Volts Magazine! I’m impressed they’re still around. When I was a teenager I won a subscription at a combat robotics event and it was my favorite thing to read every month. Highly recommend checking out their back issues for some good electronics projects!

From experience, it may be minor or it may be quite major depending on the shape of your data. If you have a whole bunch of small items that, combined, only account for say 1% of the total, then adding borders and labels to all of them may significantly skew that proportion, and the proportions of its parent/ancestors

If I may take a layman stab:

Spin period: how long does it take the pulsar to fully rotate once, ie. how often does it “flash”?

Dispersion measure: from our perspective, how much is the flash “smeared” across time and frequency vs. just being a narrow-band sharp pulse? This is a function of how much stuff (electrons) exists between us and the pulsar.

Spin-down luminosity: how much of the pulsar’s kinetic energy is being lost as electromagnetic radiation? Pulsars spin more slowly over time due to this, so how hard are the brakes being pressed?

Surface magnetic field strength: what it says on the tin, how strong is the magnetic field on the surface of the pulsar? Refrigerator magnets are 10-100 gauss, a powerful MRI might be 30,000 gauss.

Characteristic age: estimated age of the pulsar calculated by assuming a very fast initial spin & applying the known spin-down rate to see how long it would take to slow down to its current rate. Makes some “spherical cow” assumptions but should be a good rough estimate of its age.

So, what, if you make a bunch of money selling stolen goods you should be able to keep the proceeds? Surely there are plenty of cases where assets directly involved in the commission of a convicted crime may be justifiably confiscated? Seems like you’re assuming the same flimsy conditions defined in the US’s backwards civil forfeiture laws apply elsewhere in the world.