skysight-inc/HackerNews huggingface dataset:
> In the case of second-order logic, although it seems like we're getting a precise, single semantic model, in fact all we've done is push the ambiguity to the metatheory which we use to interpret the semantics of second-order logic.

So how would this work in, say, the case of the natural numbers? What ambiguity gets pushed to the metatheory if I claim that the second order theory of the natural numbers pins down a single semantic model (the "standard" natural numbers and that's all)? If it matters, assume we are using full semantics, not Henkin semantics (see further comments on that below).

> Even the choice to use full semantics instead of Henkin semantics (an example of what is essentially multi-sorted FOL as @pron refers to) is an ambiguous choice one must make in deciding second-order semantics.

I'm not sure I would call this choice "ambiguous" since the difference between the two choices is perfectly clear, and only one of them (full semantics) preserves the key property of second order logic, of pinning down a single semantic model.
The parent post meant making hydrocarbon fuels from electricity, water, and carbon dioxide. You make electrolytic hydrogen from electricity and water and then use it to hydrogenate CO2 to methane. Liquid methane has excellent energy density and would be suitable for fueling rockets, aircraft, and large ocean going ships. Or you could create synthetic kerosene by a different choice of chemical processes, if it's acceptable to trade lower efficiency for a fuel that is conveniently liquid at room temperature and compatible with legacy systems.

https://www.power-eng.com/2020/07/08/power-to-gas-examining-...

https://en.wikipedia.org/wiki/Fischer%E2%80%93Tropsch_proces...

The advantage of synthetic fuels over biofuels is that you can get a lot more fuel out of 100 hectares of solar panels than 100 hectares of crops, because plants are very inefficient at capturing solar energy as useful chemical energy. The advantage of biofuels over synthetic fuels would be lower capital costs. Biofuels have an advantage while non-fossil fuel demand is low, but they can't scale as well.

Since artificially capturing CO2 from the air is expensive and inefficient so far, an attractive hybrid path combines biomass and electrolytic hydrogen to make methane or heavier hydrocarbons. The main role of the plants is to concentrate carbon from the air. A kilogram of dry cellulose has an enthalpy of combustion of 17.5 MJ [1]. It contains enough carbon to make 0.76 kg (47.6 moles) of methane, once fully hydrogenated. That methane has an enthalpy of combustion of 41.9 MJ [2]. The biomass would supply all of the carbon and a minority of the chemical energy while electrolysis would supply the majority of the hydrogen and the final energy content of the methane.

[1] https://en.wikipedia.org/wiki/Cellulose

[2] https://en.wikipedia.org/wiki/Methane_(data_page)
That's ... oddly specific. Do you live in my building?
I think you're right. It sounds like their plans fell through:

https://outline.com/FuBxnT
That's like saying "if you can drive a car without an air-conditioner, why even bother installing an air-conditioner?"
Show HN: Upload Release Assets
site dependent means that when given an address you must treat the lhs as case sensitive. To do otherwise will mean that you've potentially broken the address and can no longer properly use it.
https://caprimedgmbh-jobs.personio.de/?language=de
I boot a RPi 4 via PXE (or rather, the RPi version of PXE, which is decidedly non-standard, meh). No SD card in the slot. No problem. Are you on the latest firmware?
GoPro | Senior Computer Vision Engineer | Paris, France | Remote but based in France | Full-time

The GoPro Software team responsible for the playback and editing experience of the mobile and desktop apps is looking for a seasoned Computer Vision engineer, familiar with recent Machine Learning techniques and very indulgent with bad jokes from management.

Reach out directly to goules at gopro.com or apply here -> https://gopro.com/fr/fr/careers/jobs/show?gh_jid=2383573
Refilling with a syringe is fairly easy. Lots of places sell blunt-tip syringes or you might be able to get away with insulin needles (I'm not sure -- pink tipped luers are the smallest I've ever used).

Do use luer-lock though, because the other kind of syringes suck. Just ask your local pharmacy -- they usually carry them and they can be used for all sorts of non-illicit-drug reasons.

In the US/Canada Lee Valley sells a set of blunt tip syringes for inks and glues.
Smarkets | Full Time | ONSITE [REMOTE during the plague] (London, UK; also Downtown LA, California)

We're a modern betting exchange, going technology first to enable proper price competition in a field of fat commissions. Join a small and agile team in our beautiful office in St. Katharine Docks. If our US location tickles your fancy, you get to help a sunny satellite office too. For the time being, thanks to Covid, we are in fully remote mode.

Smarkets develops a reliable, low-latency, highly concurrent betting exchange based on trading exchange designs. We're also building a fast, modern web interface to allow for a smoother experience. Servicing our users is top priority.

The Smarkets platform is written predominantly in Python, C++ (replacing still present Erlang[ß]) and Javascript for React & React-Native, relying heavily on asynchronous programming techniques. The tech stack sports Kafka, Postgres and Kubernetes. We use REST where we can, and gRPC where we can't. Life at Smarkets circles around people, version control, configuration management and automation. We can - and do - deploy to production several times a day.

Production environment is in AWS. In fact, Smarkets was the first gambling operator under the Maltese regulator to get permission to run everything in the cloud. We push the envelope where needed and educate auditors when necessary.

We are looking for engineering talent all across the board: frontend and mobile, infrastructure, data science, trading engine, security - and of course generalists, those yet to find their calling.

If you like the idea of flat structure and practical engineering approach, see our jobs at https://smarkets.com/careers .

---

ß: to pre-empt questions on why C++ or why not Erlang - our exchange team have promised to put together a proper write-up on the tradeoffs, design constraints, performance needs, etc. In fullness of time, that is, when the most painful (and probably interesting) migrations are behind them.
Location: Currently South East Asia (UTC+7)

Remote: Yes

Willing to relocate: Yes

Hi I’m Mark, a developer originally from the UK. I specialise in devops/system tools, workflow automation integrations, and NodeJS web development.

10+ years working in IT, experienced delivering large projects for Fortune 500 companies internationally, and working remotely.

I am very flexible with working hours and can accommodate most time zones.

Most recently I’ve been developing social media SaaS and statically generated (a.k.a Jamstack) websites, built using GitHub actions, deployed to Netlify.

Technologies: NodeJS, HTML/Javascript/CSS, Bash, AWS, Serverless, Stripe, Netlify, Heroku, Linux, Postgres, MongoDB, Redis, Nginx, Letsencrypt.

Github: https://github.com/mjgs

LinkedIn: https://www.linkedin.com/in/markjgsmith

Resume/CV: email me and I’ll send you the latest copy

Email: markjgsmith@gmail.com
> That doesn't make batteries better, it just makes ICE worse.

This doesn't mean anything. Better is always relative.
Yet another upload release assets action :-) With this version I wanted to keep the code small and legible without introducing bash or TypeScript.

It supports globbing and multiple inputs. You can see it deployed here -> https://github.com/alexellis/release-it
Microsoft | Senior or Principal Engineer | Redmond | FLEXIBLE ONSITE AND REMOTE | https://microsoft.com

Are you passionate about transforming exabytes of data into useful and actionable insights for customers all over the world through AI and Machine Learning?

Our team is building the AI infrastructure necessary to enable self-service extraction and offline experimentation (data gathering, preparation, wrangling, analysis, training and testing) of massive datasets maintained by the Office 365 team by data scientists and ML engineers all over Microsoft.

We take Microsoft's philosophy of dogfooding seriously. We leverage and drive requirements to dozens of externally available services such as Azure ML, Azure HD Insights and later our Azure AI Supercomputer (https://blogs.microsoft.com/ai/openai-azure-supercomputer/) to provide delightful experiences while preserving the same level of compliance and privacy that Microsoft 365 customers expect from us.

Tech: C#, .NET, TypeScript, React, Azure ML, Azure HDI

New benefit: You may work up to 50% of your time remote without manager approval once we re-open our offices.

Apply - Senior or Principal Engineer: https://careers.microsoft.com/us/en/job/844371/Senior-Softwa...

More info: Drop me an email (my username)@microsoft.com
> Needless to say, the pirate quotes went away in a few days as part of an emergency patch and the heartbeat message was changed to something more mundane but less likely to trigger heart attacks in our customers.

It's like the engineer picked the literal worst possible thing to send over the wire. Like making an alarm clock for people who have wartime PTSD that fires off a 9mm round to wake you up.

More startups need to be cognizant of this. Humor is important but there is a balance between fun and idiotic.
Talking point #3: if somebody disagrees with you or the mainstream opinion, they're racist.

Give me a break.
> It's longish, yet, where's the argument? please enlighten.

I'm sorry but this really comes off as trolling. It's right there in the article. Everything after Suppose we had seized the 2008 moment... describes an alternative system that doesn't sound bad at all.
Simple-as-possible plain-text CLI-based question/answer flashcard SRS
Again, in many cases this is an arrangement that's only about a hundred years old (with about six or seven decades of sovereignty) _and_ is clearly not working out for the people involved. Why do people talk as though they are immutable institutions from prehistoric times?

Plenty of people built their lives on the US being a British colony. Plenty of people built their lives on Austria and Germany being a single country. Plenty of people built their lives on the USSR being a single entity. I could go on and on listing examples. Why is everyone else allowed to naturally form their own national identities but recent (particularly African) colonies are supposed to suck it up and endure the empty ones forced on them?
Quantum circuit for the fast Fourier transform
Also to add, a new feature in Edge is copying Chrome style browser sign in. If you sign into the store, it gets added to your OS level accounts. Then Edge sees that and signs you into the browser. Google got enough shit for signing into Google in Chrome signing your Chrome installation into your google account.

Also if you're not paying enough attention, the default signing into the Windows Store is to turn your local Windows login into a Microsoft Account login.
The real winner (if hacking this homomorphic encryption is robust) will be so-called precision health care. Failure to crack the encoding means that human data will be much more sharable.
And this is why we should not be letting anyone convince us that they know best about which stories should be allowed and which should be suppressed.

Those advocating for what amounts to a Ministry of Truth should really know better. We've already learned this lesson. This lever of power should not exist because it is impossible for it not to be abused.

For all the downsides of too much information and a torrent of crappy opinions that exist on an open internet, it's still much better than the results you get with authoritarian oversight.
I never thought about changing it until just now. Courier New 12pt.
Terms of service that hurt the end user are a bad idea, unacceptable, like dark patterns that cause people to opt in to things they don't want. It's not a crime, but it's immoral.
I think in general moving towards allowing people to achieve equality themselves is good. I think going hell-bent on more-of-less-equal starts to bring out the monsters in people.
Epigenetic Secrets Behind Dopamine, Drug Addiction and Depression
ByteFederal | Full Stack Developer | Sarasota, FL | Full Time, Onsite | www.bytefederal.com

Fast growing FinTech startup developing hardware and software for a fleet of kiosks, made in the US. We also operate a network of "bank in a box" ATMs across the US. Our mission is to bring banking services to the unbanked and crypto to "Main Street". We are looking for an experienced engineer who enjoys pushing the boundaries. US citizenship / green card required.
Languages include: PHP, Python, JS, C++, SQL. This position requires solid understanding of consumer facing front-end design as well as serious Linux and Python skills. Join us on the Florida Suncoast with lovely beaches, perfect for family life plus a very competitive salary. Flat management, no cubicles and a laser focus on innovation defines our highly professional spirit.

Apply at jobs@bytefederal.com
Ladder | Software Engineer | Clojure, Clojurescript, AWS | SF, Remote within the US | https://www.ladderlife.com
Ladder is building life insurance for consumers: instant, simple, and smart.

We're looking for software engineers who are excited to help us reimagine what life insurance can be.

Our tech stack includes Clojure(script), Datomic, Kafka & AWS.

Read the full job description and apply here: https://grnh.se/d9f5b5cc1us
I think it is more ghastly and inhumane to think that companies that choose not to market to those they disagree with are somehow doing them a disservice by not marketing to them. They are doing them a favor. It would be completely different if they were saying they couldn't shop there, just like if you intentionally look for women doctor's to tell them that you think they are inferior or if you look for dark skinned people on dating websites to tell them you don't like their race. I personally see no positive effects from advertising whatsoever, and am better off if a company thinks I'm too old or whatever to sell their product to.
I am actually looking for a long time to video-hosting alternatives to YouTube, Vimeo, Wistia.

The pricing seems a bit hard to understand what it means in the real workd.

> 600 hours watched time/month

This is only around 7200 views of a 5 minute video, which translates to around 240 daily visitors on a landing page. Are all the alternatives using the same "hours watched" pricing model?
Amazon patent envisions pairing toxic gamers with other toxic gamers
The link between video games and unemployment (2017)
US Environmental Protection Agency (https://epa.gov) | (IT Director: DC), (Software Engineer: MN, NC) | Full-time | (IT Director: Up to $170K, Software Engineer: Up to $123k)

Come help protect human health and the environment at one of the premier research agencies in the US.

Two positions, the software engineering position is in Center for Computational Toxicology and Exposure, where researchers identify what chemicals are safe for humans. You will be working with terabytes of data generated from our labs, robotic laboratories, and some of the top scientists in this area.

Second is IT director for OIG, which is the enforcement arm of the EPA. This is a high level management position working to try and get the investigators the IT tools they need to help with enforcement.

Both positions telework for now, somewhat flexible after covid. Working hours extremely flexible (see opm maxiflex)

Benefits: Pension (fers), Matching 401k (tsp), healthcare (fehb)

My email in bio for questions

---

US Citizen only, apply at usajobs.gov

Director: https://www.usajobs.gov/GetJob/ViewDetails/582059900

Software Engineer: https://www.usajobs.gov/GetJob/ViewDetails/582531100
My reading of the OP is that these techniques (branding, nominal typing, &c) are good and useful, but it's even better if you can remove/minimize the necessity of ever trusting software developers to make reasonable decisions. Speaking from experience, even on personal projects where I am fully in control of my requirements and deadlines and the only person who has ever and will ever touch a codebase is me, I have regretted trusting software developers to make reasonable decisions w/r/t an internal (let alone external) API.

Less cynically, if you have assumptions and facts present about your data at runtime, it makes good sense to spend some extra effort encoding them explicitly in the data representation when your type system supports it, rather than allowing them to exist implicitly (or by documentation only) as a tag. Even if you discount the advantages provided in shrinking how much you are forced to trust your users, reifying your knowledge about a piece of data gives the compiler (and other static analysis tools) more information to help you write the code in the first place: The article provides some examples in terms of exhaustiveness checking, but you can also leverage such things if you have access to fancy toys like refinement types, dependent types, or a development environment that can do tactics-style interactive transformations. IMO it also makes your code easier to read and understand, but that might just be a matter of taste.
It would be nice if in these cases the “lock” allowed read only (as in, can still receive email, just not send it) gmail access so one could at least move whatever account they were using gmail as contact for. I think it should not be that hard for google to add this and would help with a lot of cases where losing gmail access means severe disruption to one’s life.
> Except that you already agreed to this behaviour when you signed up.

No, you didn't. You may have ticked a box that said you read the terms of service, but as we all know, no one is reading those documents. It's just plainly dishonest to drop something so unexpected into a ToS.
you might already know this, but Noodler makes an extremely quick drying ink called the Bernanke. It's available in blue and black and dries way faster than anything I've ever seen. It doesn't feather or bleed on any paper I've tried it on.

I used to use Staples Sustainable Earth notebooks, now I've started using their TruRed series. I also use Rhodia notebooks, but am switching to TruRed because they're easier to find, cheaper, and handle my other inks better (the rhodia stuff actually performs terribly with all my other inks -- no idea what the deal is).

Combined with a 0.3mm Platinum nib I never have any issues. If you've tried Parker Quink it's significantly faster.
Facebook exempted Trump allies from misinformation rules
SEEKING WORK, South East Asia (UTC+7), remote work OK

Willing to relocate: Yes

Hi I’m Mark, a developer originally from the UK. I specialise in devops/system tools, workflow automation integrations, and NodeJS web development.

10+ years working in IT, experienced delivering large projects for Fortune 500 companies internationally, and working remotely.

I am very flexible with working hours and can accommodate most timezones.

Most recently I’ve been developing social media SaaS and statically generated (a.k.a Jamstack) websites, built using GitHub actions, deployed to Netlify.

Technologies: NodeJS, HTML/Javascript/CSS, Bash, AWS, Serverless, Stripe, Netlify, Heroku, Linux, Postgres, MongoDB, Redis, Nginx, Letsencrypt.

Github: https://github.com/mjgs

LinkedIn: https://www.linkedin.com/in/markjgsmith

Email: markjgsmith@gmail.com
How Suckerfish Surf Across Blue Whales Without Falling Off
Absolutely not. Trump is the only one who did it. Your comment is completely wrong. Acting as if Obama “also” did something wrong here is utterly disingenuous in an intellectually bankrupt way - it is not comparable to Trump’s behavior and any attempt to argue it is comparable is, at this point, literally the same as legitimizing fascism.
Given the relationship with the iMac launch having the same title years ago, I wonder if they're releasing an Education spec iMac as the first run of the new Arm chips? All signs point to a macbook re-launch, but this could be intersting.

Also, aren't they allegedly releasing a new GPU with this?
Does this power button (function F10) just hard power off or does it do a scripted shutdown?
I'm curious about the anchoring of that. What are you weighing your personal desire against? What else would you do with that money?

I don't game much, but I get the impression that a AAA game costs $60 and provides about 20-30 hours of entertainment. That's cheaper than a a movie theater and roughly on a par with a rental movie. It's more expensive than watching the streaming service you're already paying for, but would a streaming service have that much more content you want to watch? Or were you thinking of a completely different activity -- exercise, reading, etc?

You seem to have a pretty firm idea of how you feel about it, so I'm curious. HN readers are often in fairly well-paid professions and even $60 is unlikely to be a serious cost, so I'm interested in how they go about making spending decisions.
Fast Computation of the Median by Successive Binning
I would guess SO had a relatively small number of employees and their servers were running a pretty straight-forward CRUD app and a database. Comparing that to the heterogeneous workloads that large organizations deal with is a bit silly. No doubt there's still a lot of fat to trim in those large organizations, but trimming that fat is rarely their largest opportunity (much to the chagrin of those of us who like simple, elegant systems).
Niantic Labs asking people to go out to play ingress
https://community.ingress.com/en/discussion/12525/a-new-phas...
Thanks for the explanation! It certainly made more sense now :)
Sharing a TV with everyone and everything else in the house is far from ideal. A good number of home-computer users did it in the '80s, but only out of necessity. You need multiple fully-working TVs knocking about the house before giving one over to a computer is likely to be no problem, and that's probably a lot less universal.
Neat, wasn't expecting to see an ATL position here. But recently moved back, threw my hat in the ring.
It's not so problematic today, there are multiple TVs in most families now. And old functioning, like, 1280*1024 LCD monitors can be had for free.
Do you read the terms and conditions in full, for every single piece of software you use?
Lithium is evaporated from brine ponds, and cobalt is actively being phased out in battery chemistries because of its role as a conflict mineral. Battery storage for all use cases is objectively better than burning a fossil fuels.

> At least CO2 can be scrubbed from the atmosphere.

There is no evidence we can scale this up besides planting trees and hoping for the best.
Yeah, this is absolutely true, but we don't really like to impose a rule regarding which editor(s) people use. Most of our workflow is Windows-based.
Cmd | Vancouver, BC | Onsite or Remote within Canada | Full Time | https://www.cmd.com

We're a cybersecurity startup on a mission to transform the way businesses secure their cloud-first Linux environments. Our mission is to help companies reliably log, understand, predict, and control user behaviour in their Linux environment.

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-You're naturally curious, interested in expanding your knowledge
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Open Roles:
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