flubert

Would geometric algebra simplify a CAD program (or are there any CAD system that use geometric algebra)? Would learning geometric algebra make synthesis of mechanical linkages easier (planar/spherical/spatial)?

Any data available that quantifies that effect of asymptomatic transmission? Are they the main driver of new infections or a minor player?

>HN's perspective on lockdowns might be skewed by the fact that most of us here live in places that actually did have a good faith reasonable response to COVID, but it didn't really work in the absence of a coordinated nationwide response.

...care to expand on this hypothesis? I've heard variations on a theme around this. I live in an area which seems to have close to 100% mask compliance for the last several months as near as I can tell, and we still have cases increasing. I guess I'm having a hard time believing that it is visitors from Texas (or where ever) coming in and spreading coronavirus. What it seems to indicate to me, is that public shopping, etc. isn't a driver behind the spread.

Covid-19 death rates:

    Sweden:  60.53 per 100k
    Denmark: 13.11 per 100k
    Finland:  6.69 per 100k
    Norway:   5.53 per 100k

https://coronavirus.jhu.edu/data/mortality

Is anyone in the U.S. using thermal cameras to spot individuals with a fever? I live in a smaller city, not really close to a big metropolitan area, but I haven't seen a thermal camera in use yet. I see they are available on Amazon, so it doesn't seem like it is an issue of availability. Are these being used by businesses in other areas of the U.S.? Seems like it would be a no-brainer to use these to non-invasivly screen patrons.

Does anyone have statistics on mask wearing compliance in public? Seems like someone could use ML to identify people with and without masks. Last time I went out shopping it was 100% compliance (and using a mask correctly) as near as I could tell.

Simon Peyton Jones also work for Microsoft, so maybe add Haskell to the list.

For anyone interested in the underlying data, I believe this is the most quoted piece by the popularizers:

https://pubs.er.usgs.gov/publication/pp1661F

...that has the full-fault events at ~500 year intervals, and the partial-fault events at ~240 year intervals. Last full fault event was January 26th, 1700.

>The real concern is that people are wasting money on multivitamins that would better benefit their health if spent elsewhere, Paranjpe said.

Curious if there would be a concrete suggestion to replace the $5/month on vitamins.

Full disclosure: I started taking a multivitamin recently, on the basis of it seems like it can't hurt, and who knows, maybe it could help for corona.

Maybe also add Idris?

https://github.com/chrrasmussen/Idris2-Erlang

General recursion is equivalent to goto. It is nicer when recursion can be wrapped up in a higher level combinator (map, fold, etc.) or other even higher level abstraction. That's one thing the array languages (APL, J, etc.) got right.

>Laptops aren't $100 brand new

Getting close?

https://www.newegg.com/p/0G6-00ZK-002K5?Item=9SIA6Z72ED8144

https://www.newegg.com/p/1TS-003M-00001?Item=9SIA7Z046M4434

>already high tidal forces.

Tidal forces are low for supermassive black holes, right?

https://en.wikipedia.org/wiki/Supermassive_black_hole#Descri...

>A software malfunction in a microwave oven, or some other device with a heating element, could cause a house fire...

Now I'm curious. Does anyone know the manufacturer and model number for a microwave for which this is true? Have we really replaced hardware thermal switches, fuses, etc. with firmware?

>...If, in order to "really" enter a programming culture, I need to both "be solving a significant real problem in the real world" and exercising "the freedom to change the language, the compiler, the OS or even the hardware design", then there are very few options for entering this culture indeed.

https://yosefk.com/blog/my-history-with-forth-stack-machines...

Off-topic, but has anyone ever taken the time to dive into:

http://alternativephysics.org/book/GPSmythology.htm

...which claims that the "standard" account of GPS needing relativistic adjustments is not correct. If nothing else, the author seems to have perfected the "crank" writing form.

What other applications would a 4-5 order of magnitude more sensitive detector have? There are obvious applications to geology mentioned in the paper. How would that sensitivity compare to LIGO?

Depends on the spatial resolution I suppose, but being neutrally buoyant (like an airship or hot air balloon) would seem to be much harder to to detect, since you are the same average mass as the air you are displacing.

Is this targeted more at users of the condition system, or implementers who are writing their own common lisp compilers?

From the Amazon blurb:

>In part 1 of The Common Lisp Condition System, the author introduces the condition system using a bottom-up approach, constructing it piece by piece. He uses a storytelling approach to convey the foundation of the condition system, dynamically providing code to alter the behavior of an existing program. Later, in part 2, you’ll implement a full and complete ANSI-conformant condition system while examining and testing each piece of code that you write.

I wonder how much time per day the average person contemplates the 480,000 annual U.S. deaths caused by tobacco?

https://www.cdc.gov/tobacco/data_statistics/fact_sheets/heal...

Isn't the slash on the zero digit going the wrong direction?

I wonder how many lines of code were behind the QNX demo disk?

http://toastytech.com/guis/qnxdemo.html

>Not sure what can be done. Though I am tempted to go see what a 9,000 line OS looks like.

I think you are going to like STEPS:

>The overall goal of STEPS is to make a working model of as much personal computing phenomena and user experience as possible in a very small number of lines of code (and using only our code). Our total lines of code target for the entire system -- from user down to the metal is 20,000, which we think will be a very useful model and substantiate one part of our thesis: that systems which use millions to hundreds of millions of lines of code to do comparable things are much larger than they need to be.

http://www.vpri.org/pdf/tr2012001_steps.pdf

>But what about the people who will be rejected because of their genes?

That is illegal in the U.S., with the Genetic Information Nondiscrimination Act (GINA)

https://www.genome.gov/about-genomics/policy-issues/Genetic-...

>GINA prohibits health insurers from discrimination based on the genetic information of enrollees. Specifically, health insurers may not use genetic information to determine if someone is eligible for insurance or to make coverage, underwriting or premium-setting decisions. Furthermore, health insurers may not request or require individuals or their family members to undergo genetic testing or to provide genetic information.

Is this a nerd sniping thing? It has been a while since I've wrestled with Perl, but I suppose the recursive file search would keep it from being a one-liner. 4-5 "reasonable" lines maybe? Definitely less than 80 characters? I see I don't even have Perl installed on this machine, oh well.

You made me curious enough to walk downstairs and weigh it. I've got "Catalog 126" (copyright 2020), and it weighs in at 7.92 pounds, and is 4168 pages long.

Yes, maybe 4 times per year. Probably should do it more. I receive BCC'ed mail more frequently, but that frequency should be higher. There should probably be a feature in Outlook that stops and asks "Are you sure?" and makes you wait 30 seconds when replying-all to anything more than 10 people. Maybe the wait should be 1 second per recipient.

What do you mean by that? Their prices are higher than most, but anyone can purchase from them.

Detecting the presence of these transmuted elements should be much easier to replicate than trying to characterize "excess" heat, right? And the next step would be to try and find out what isotope of the transmuted elements was? Anyone know how much deuterium costs?

https://thenewfire.files.wordpress.com/2020/10/nasa_transmut...

Not being a mechanical engineer, I don't have an intutive feel for how the additive nature of the pressure develops as you describe. I would have thought that the outer layers would start to compress the inner layers, relaxing some of their stress. Is the a mech-e 101 type of link you could pass along to help get me up to speed? Or maybe you are saying that 3.6 GPa times the ratio of 100 mm to 1 mm gets us to the 360 GPa mark? So you don't need to have layers of Kevlar as your "anvil", you could use something else more rigid, and just wrap one layer of Kevlar around it and develop the needed pressure. Thanks.