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metaphor

4,146 karma · joined September 7, 2015

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metaphor··on Amateur radio skills prove useful during bushfire emergencies
> ...regulation blocks it from staying new.

What do you mean?

metaphor··on The DOJ Is Finally Suing US Telecom Providers for Robocalls
Occam's razor would appear to suggest otherwise.

US population is ~5x greater than the UK, while UK GDP per capita is less than the US. More generally, the per capita economic posture of the US is strong compared to the top 10 most populous countries in the world. If you were an opportunist robocalling scammer operating on a purely probabilistic model, the UK would be a pragmatically irrelevant target. The situation in the US isn't helped by regulatory capture either.

metaphor··on I2C in a Nutshell
> In doubt, go to 2K resistors.

I find handwaving recommendations like this rather pervasive and annoying, especially in a professional setting.

If you're serious about I2C after gratifying yourself with this bootcamp-style smashbang intro, I highly recommend reading the actual spec[1] (which is more like a casual app note IMHO); the blog apparently doesn't link to it. It's free, relatively short, and oh by the way, there's an entire section which properly addresses pull-up resistor sizing and then some. You'll also be able to spot inaccuracies like:

> It has transfer rates up to 400Kbps

[1] https://www.nxp.com/docs/en/user-guide/UM10204.pdf

metaphor··on I2C in a Nutshell
The right-click-to-save-as-PNG-or-SVG feature is quite nice as well.
metaphor··on Ever-growing cars: why they keep on getting wider
> We’ve never had US style land barges, they simply wouldn’t work on our roads.

Land Rover, Rolls-Royce, Bentley, Jaguar, Aston Martin: all iconically British and not known for their compact offerings.

metaphor··on Ever-growing cars: why they keep on getting wider
> ...I would be surprised to learn if the occurrence of lane departure accidents has gone down or stayed the same since cars have begun to get wider.

Now is that primarily a consequence of wider vehicles or smartphone-induced distracted driving?

metaphor··on Ever-growing cars: why they keep on getting wider
Most modern cars are also unibody, so the center console interior design element isn't entirely without merit.

The axial bulge that would normally be concealed by a center console acts as structural support in vehicles without driveshafts. Furthermore, if it exists, the cavity will also serve as exhaust midpipe routing to the rear for improved underbody aero performance. Some manufacturers also offer an AWD variant of a chassis primarily sold as FWD--e.g. Acura TL, Mazda3--so design reuse is another path to consider.

The Model 3 doesn't appear to fit this generalization, but a center console still makes sense. It's a 5-passenger vehicle by design, so rear seating arrangement will drive width constraint. You can't put a 6th seat in the front-center position for obvious safety reasons, while leaving it empty would miss the mark when compared to competing luxury vehicles around the same price point (something about how America loves cupholders comes to mind), so filling it in with a sleek and generous center console strikes me as the natural direction to steer towards; it's cheap, serves a functional purpose, fills a void and flows with the overall interior aesthetic. Besides, a closed luxury cabin whose volumetric efficiency approaches 100% is a luxury vehicle that simply won't appeal to the masses.

For a good idea of just how inconvenient not having a decent center console can be, look no further than the ND Miata. Anecdotally, mine is a weekend solo/track toy so not a deal breaker, but it's one of those things that can be easily taken for granted until you don't have one anymore: fitting a pair of sunglasses in the laughably small center compartment is like working a puzzle piece, the large rear-center storage compartment can't be conveniently accessed while seated unless you're a human pretzel, some smartphones won't fit in the cubby hole designed to hold one, and retaining non-bottled drinks with a passenger seated is a spill accident just waiting to happen.

metaphor··on Inside the digital clock from a Soyuz spacecraft
Hadn't realized; thanks for pointing that out.
metaphor··on How Tiffany moved 114k gems without getting robbed
In the US, a bullet's notional size and weight is perhaps more familiar than grams (or any metric unit, really). In any case, I sense there was a subtle pun in that its cost is liable to kill the financial livelihood of most.
metaphor··on How Tiffany moved 114k gems without getting robbed
> On the second floor, in what Tiffany calls the “love and engagement” department — where it sells engagement rings and wedding bands — Leslee Nugent, an employee, was packing a 10.64-carat engagement ring priced at $2.475 million.

I suspect this 10.64-carat ring is the particular asset in question.

metaphor··on Inside the digital clock from a Soyuz spacecraft
> The point is that the Shuttle's TTL chips were more advanced as far as performance, using Fairchild's FAST line.

This. The author points out the 54F00, seemingly distracted by the 54'00 part and similarities in TTL glue logic layout that the F part is completely dismissed without acknowledging that these chips had sub-4ns edge rates and were indeed fast while remaining compatible with older TTL families. Throw in high SMD density on a multi-layer controlled-impedance PCB designed to survive brutal operating environments when PCs and CAD were still in their infancy...even today, it's humbling to contemplate just how much work would have been required to qualify such a design.

> But it's interesting that the Shuttle was still using TTL...

These systems had super long lifecycles and were required to be extremely reliable. I'd be surprised if the contractor that was responsible for the design would have been allowed to integrate any IC that wasn't listed in a QML.

metaphor··on Washington pressures TSMC to make chips in US
From the article:

> The U.S. accounts for 60% of TSMC's sales, but the company operates only its subsidiary WaferTech there, producing chips for mature technologies.

In this case[1], "mature technologies" appears to mean downto 160nm tech node...essentially irrelevant with respect to FPGAs.

[1] https://www.wafertech.com/en/foundry/technology.html

metaphor··on Linus: Don't Use ZFS
To be sure, it's entirely feasible, just not prudent with today's typical disk capacities.
metaphor··on The Wall, a modular microLED display
I don't follow your logic. What makes you think Samsung is applying consumer-grade smartphone design/cost-optimization hardware hacks to modules targeting a completely different market segment, let alone form factor?
metaphor··on Suspension of Cogent Access to ARIN Whois
FYSA Curran clarifies scope of the 6-month suspension a bit later[1]:

> ARIN has suspended service for all Cogent-registered IP address blocks. Customers with their own IP blocks that are simply being announced by Cogent are not affected.

[1] https://mailman.nanog.org/pipermail/nanog/2020-January/10523...

metaphor··on I made my own image sensor and digital camera [video]
Fun and a great learning experience, sure. But, at least with respect to infrared, I'm not seeing the cost effective part when fully integrated solutions with ~19x greater resolution and then some can be had for $400 retail; the BOM for such a project will approach (if not exceed) this figure. Prototyping is often deceptively expensive.
metaphor··on US atomic waste dump in Marshall Islands to be investigated
Genuinely curious if any Marshallese prowl HN.
metaphor··on DIY ‘Meta Clock’ with 24 Analog Clocks
An assertion with so many conditional assumptions that it's pragmatically meaningless.
metaphor··on Drones flying nighttime patterns over NE Colorado leave law enforcement stumped
I distinctly recall you griping about ads while reading IEEE articles a few days ago[1].

FYSA wasn't able to replicate the reader view issue with uBO on Firefox, both desktop and mobile.

[1] https://news.ycombinator.com/item?id=21850005

metaphor··on A Stanford Professor Says Juul Stole Her Anti-Vaping PowerPoint Slides
The methods of the NHS are not without its fair share of public criticism: https://observer.com/2019/10/vape-crisis-public-health-resea...
metaphor··on Does simultaneous multithreading still make sense?
It was a half-hearted remark in passing targeted towards the class of "hardware folks" who might care about the finer details of surface mount technology. Try not to get too offended.
metaphor··on Does simultaneous multithreading still make sense?
Agreed.

At first glance, I genuinely thought this was going to be a pitch for yet another fragile additive manufacturing toy with narrow usecase, or a new process that enables IPC-7092 designs on the cheap.

metaphor··on Does simultaneous multithreading still make sense?
FYSA, SMT in this context is simultaneous multithreading a.k.a. hyperthreading, not surface mount technology.

Hardware folks can safely move on.

metaphor··on Autonomous DeLorean drives sideways to move forward
It's an e-stop button (probably NFPA 79 Cat 0 implementation), not dead man's switch. This timestamp[1] clearly depicts an air gap between fingers and button while maneuvering.

[1] https://youtu.be/3x3SqeSdrAE?t=74

metaphor··on Autonomous DeLorean drives sideways to move forward
> They probably already have a bunch of lubricant on that lot in order to reduce wear on the tires.

That's a real skid pad at a real road course[1] with real rules and regulations[2], not some expendable engineering testbed greased up to save tires.

[1] https://www.thunderhill.com/renting/skid-pad

[2] https://www.thunderhill.com/s/Skidpad-Event-Guidelines-2018-...

metaphor··on ACM signed letter opposing open access
Who are you kidding? For the same annual cost of IEEE membership which doesn't provide shit for access to papers, ACM opens up its entire Digital Library!
metaphor··on ACM signed letter opposing open access
> If you want to be in one of the clubs that badly, support the IEEE instead. Friendlier, cheaper, and not controlled by lawyers.

As a dues-paying member of both organizations, you've seriously got to be smoking crack.

Comparing apples to apples of what annual dues buys you as a member, IEEE charges ~$200/yr (increases every year for the past 10+ years I've ponied up) for a glorified Gmail account that's internally spammed by the organization (and almost certainly mined) while papers still has to be purchased on the side for a ridiculous minimum subscription[1] of $19.95/mo to read 3 papers. ACM provides full access to their Digital Library[2] at the same cost and even offers lifetime membership for perpetual access!

[1] https://www.ieee.org/publications/subscriptions/products/mdl...

[2] https://dl.acm.org/

metaphor··on U.S. Navy bans TikTok from government-issued mobile devices
> One off bans makes more sense, a whole unit set up to pre-approve millions of potential apps is crazy-town.

The meta[1] is more real than most probably realize.

[1] https://www.doncio.navy.mil/TagResults.aspx?ID=22

metaphor··on A $7 Credit Limit: Jack Ma’s Ant Lures Hundreds of Millions of Borrowers
> Right, but for anyone who has to keep a close eye on their balance (so excluding most HNers)...

Keeping a close eye on your balance is basic financial responsibility and maintaining situational awareness against the ever looming threat of fraud. It doesn't matter if you operate on a bank account with $10 or $100,000...if you're not actively accounting for your transactions, that's a personal flaw. The way how I see it: if you don't have the discipline to properly account for even the smallest expenses, you'll never be able to sustain wealth at any significant level.

Anecdotally, a recurring pet peeve encountered is when I'm not provided with a receipt for purchases by default. This happens more often than not at fast food joints and gas stations, and when kindly asked for one, I almost always receive a reaction of either dubious entitlement or disgusted inconvenience, highly correlated to which car I happened to take that day. Although this class of expense is in the noise with respect to my financial posture, I still track them with unwaivering vigilance and find it so ironic when a minimum wage cashier who probably struggles to make ends meet every week disrespects that little piece of paper which enables personal accountability. Stochastically speaking, many of us--including myself--come from humble beginnings.

metaphor··on Apple Explains Mysterious iPhone 11 Location Requests
Delusional.

Who cares if your Apple device constrains location information when, stochastically speaking, other devices within your proximity won't.

This has been meta for a long time: WiFi, Bluetooth, cell towers, TPMS, just to name a few common mappings. UWB is yet another PHY contributing to the datapool.

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