HNHacker News
TopNewBestAskShowJobs

aeternus

780 karma · joined October 27, 2017

submissionscomments
aeternus··on Tesla Model 3 spoofed off the highway
Tesla vehicles can likely be made less vulnerable to this attack than even human drivers navigating via cell-phone GPS since Tesla has inertial measurement units.

They are likely 'trusting' GPS signal over IMU currently, but that could be changed via software. Or at least alert if the signals disagree.

aeternus··on Slack Is Going Public at a $16B Valuation
Notifications are easy, do many companies really use more advanced bots?
aeternus··on Where Has the Magic Gone?
Why are you trying to do in terms of machine vision for drones?
aeternus··on Bitcoin’s carbon footprint is as big as the entire city of Las Vegas
The most popular miner right now is the Antminer S9. It consumes 1372 Watts / 14TH.

98 Watts / TH, and the current total Bitcoin hash rate is just under 50,000,000 TH/s. This means that the entire Bitcoin network (all miners) are consuming 4.9 gigawatts.

It's hard to find stats on how much power Las Vegas uses, but NVEnergy reports that North + South Nevada use 7.8 gigawatts, and some other articles estimate Vegas alone at 8GW. So, not quite but definitely close.

aeternus··on Why are we so pessimistic?
Yes, people seem to greatly underestimate how much their own outlook affects others.

This is actually an important quality I try to look for when hiring. I've seen some very technically competent leads cause team productivity and morale to plummet due to their negativity and pessimistic outlook.

aeternus··on What Is Called Nuclear Waste Is Mostly Fuel for Molten Salt and Fast Reactors
Right, the liabilities are hard to determine and those liabilities may increase substantially if simply buried.

This is because most types of spent nuclear fuel slowly become "weapons-grade" as the short half-life isotopes decay.

aeternus··on The Problem Is Capitalism
There are plenty of towns and villages where people can live in the economic conditions of the 1800s or 1900s. Almost no one chooses to do so.

Economic growth is overall strongly correlated with human prosperity, higher life-expectancies, and higher standard of living. If we ever do run low on a natural resource, capitalism softens the blow by gradually increasing prices, thereby increasing incentives for finding an alternative.

aeternus··on Code Reviews Are Broken – Here Is How to Fix Them
Defining clear owners for each repo makes sense, however having a single owner is a problem for most companies:

What if the owner goes on vacation but something needs to be merged and released during that time? Yes everyone has a copy, but does this mean you would release from a feature branch?

Owner's ability to commit without review is a significant security and product risk. Violates multiple security standards like PCI, OWASP.

How does this scale, do you eventually have multiple owners per repo or do you have to constantly break the larger repos into smaller repos as the team grows?

How do you handle the knowledge loss when the owner leaves the company?

aeternus··on Four Mars missions are launching next year
Tunnels are a much better solution. More radiation protection and built-in structural integrity. Just use giant LCD panels for natural light shafts for windows.
aeternus··on Deep neural network vs. commercial algorithm in low-dose CT image reconstruction
Yes, this should be a major concern, especially since CTs are used to detect abnormalities. It's very likely that the vast majority of the training data will be what is considered 'normal' for any given part of the body.
aeternus··on When Will the Planet Be Too Hot for Humans? Much, Much Sooner Than You Imagine
Extreme claims like "That the sea will become a killer is a given." require extreme evidence yet nothing is cited.

Overly alarmist article from 2017 lacking actual substance.

aeternus··on No Kings: How Do You Make Good Decisions Efficiently in a Flat Organization?
One method I've found to work well, especially with engineers:

Make it clear to the team that the new leader is stepping up temporarily to fill a significant business need. That the engineer is doing the team a favor by doing this and that the plan is for it to be temporary because that engineer is a great IC.

It then becomes very easy for the new leader to go back to being an IC. They can even be thanked for stepping up to help the company during a critical time. They can also easily do it again in the future.

If the person is a great lead and gains the team's respect, then simply make it permanent.

aeternus··on Amazon.com Credit Builder: Build credit with no annual fee
>This really becomes a problem when people use credit to pay for things they can't afford, of course.

This is exactly it. People who use credit to pay for things they can't afford are a risk, but how do you identify those people efficiently? Seems logical to test for that by starting with low credit limits rather than immediately offering loans for items of high value like a car or house.

The consumer gets a free 30-day loan and the issuing banks (via credit agencies) get valuable data.

aeternus··on Amazon.com Credit Builder: Build credit with no annual fee
It really is the greatest business plan ever though. They figured out how to loan money at 28% APR without actually having to loan out any money.

Very impressive.

aeternus··on Momentum is building to explore Venus
We definitely have. There's huge environmental impact, but that is to be expected.

California's Central Valley project is an example, and China has some that are even larger.

aeternus··on Momentum is building to explore Venus
Other than a basically unlimited supply of CO2 however, what would the advantage be compared to a just a space station?

With Mars, you can mine building materials from the surface.

aeternus··on How to tell an engineering candidate they didn't get the job
Look at it from the company's viewpoint. Giving you any feedback other than 'not a fit' is risky with basically zero gain for the company.

Many people don't take feedback well, some will attempt to argue or enumerate via a review site the details on why they believe the company made the wrong decision.

Any feedback has some risk of being construed as discrimination. The accusation alone can have huge negative impact on a company's reputation. Better just not to risk it.

Sometimes feedback can leak company info, IE we're looking for a candidate with more experience in X because .. left or we're starting work on Y product. This is also a risk esp. in the not unlikely event that the candidate ends up working for a competitor.

aeternus··on Ford Is Fined in China
Some Chinese companies are already making very high-end products.

Look at DJI, Huawei 5G and phones, even pure-software like WeChat.

aeternus··on The Future of Food Delivery [slides]
Not everyone enjoys cooking. There are also some very motivated people that simply would rather spend their free time in other ways.
aeternus··on Apple's Audacity
Legislation is typically a very suboptimal solution. Even something like GDPR, which is well-intentioned significantly increases barrier-to-entry for small competitors.
aeternus··on YouTube star who humiliated homeless man given prison term
Why shouldn't food tampering be illegal? I believe it's illegal in almost all US states, and is a felony is some.
aeternus··on A Peer to Peer Voting Algorithm [pdf]
Here's one way to do it that requires basically zero trust in the software:

1) When voters enter the booth, they throw a large number of multi-sided dice.

2) The resultant throw is scanned via computer-vision. Voter verifies it is correct, and it becomes the voter's ID. Voter votes normally and the vote is recorded alongside that generated "ID".

3) The voter receives a print-out that contains their (ID, vote), however it is randomly shuffled in among other real (ID, vote) pairs. The print-out is guaranteed to have at least one vote for each candidate.

4) The entire list of (ID, vote) pairs can be published nationally. Everyone can verify that the right number of votes were counted, and that their vote was accurately counted since they can find both their ID and vote in the national list.

They can show their receipt to others but cannot prove which one of the many IDs on the receipt was actually theirs.

aeternus··on Why Was Mini USB Deprecated in Favor of Micro USB?
Magnetic really seems great for connections, I wonder why it isn't used more.
aeternus··on ‘Robots’ Are Not 'Coming for Your Job'–Management Is
Many companies are becoming increasingly data-driven so in some cases it's actually not the "rich people" making these decisions. We are increasingly seeing contracts that commit a company to whichever solution produces better KPIs after a trial period.

Companies generally act very logically and seek to maximize their future cash flows. If economic incentives change, such as labor becoming more expensive, automation becomes cheaper relatively, and we should expect a well-run company to invest more in automation.

It makes little sense to blame the managers. We live in a market economy and policy-makers should look to economic incentives as the main way to drive behavior.

aeternus··on The Boring Company will develop an underground “people mover” for Las Vegas
Sure, I'm by no means suggesting deprecating roads. They still serve an important purpose and will always be important for the 'last-mile'. Roads however have significant constraints since you can only build them in two dimensions.

The premise of Boring Company is that by building smaller tunnels, they can build them much more cheaply. Commutes could be more efficient, and city traffic reduced substantially if people could take tunnels across the city instead of drive.

aeternus··on The Boring Company will develop an underground “people mover” for Las Vegas
What is the actual goal of environmentalism on earth?

If it is to preserve diverse species, then it absolutely makes sense to colonize other planets and spread the wide variety of plants, animals, and other organisms. The earth will eventually be burned up by the sun.

aeternus··on The Boring Company will develop an underground “people mover” for Las Vegas
A more point-to-point metro system would be great. The airline industry has been embracing this change for quite awhile. People don't like a hub & spoke system and it doesn't make sense to take everyone to city center which just adds to the crowding and congestion, as many current metro systems do.

Imagine a city that is crisscrossed with multiple direct metro lines. Design for extremely frequent departures, which likely means smaller carriages.

We should be designing our transit systems to be faster and better than car-based travel.

aeternus··on Uber will start deactivating riders with low ratings
Yes, an "I'm travelling with dogs" option would also be quite useful. Some drivers love them and some hate them and are paranoid their car is going to be ruined the entire ride. It'd be better for both rider & driver if this matching were done automatically.

Most riders would probably be fine with a small additional fee.

aeternus··on Uber will start deactivating riders with low ratings
I'd suggest adding #4. Not using turn signals. This makes things slightly less safe for everyone else on the road (including peds + bikers) and it costs the driver nothing to properly signal.
aeternus··on Uber will start deactivating riders with low ratings
TPMS is also relatively easy to reset (just read the manual) it does not require professional service. You usually do need to do it seasonally due to fluctuations in outside temp. Drivers should really be aware of it.
← PreviousPage 3 of 13Next →