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jjslocum3

453 karma · joined March 25, 2022

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jjslocum3··on Privately-Owned Rail Cars
This was a common practice in the early 20th century, as many of the wealthiest in the US owned and traveled by private rail car.
jjslocum3··on I Posted on YouTube Consistently for 1 Month. This Is What Happened
By way of thanking you for this informative little summary of issues involved in creating YouTube content, I went ahead and subscribed. I'd be interested to hear from you in a few days what impact this HN post had on your subscriber numbers.
jjslocum3··on Space explosion reveals possible hints of dark matter
Also what I think is being asked:

...if the photon comes to rest on earth, and we compare clocks...

IIRC, the deceleration of the photon relative to me (as it comes to rest on earth as would a returning space traveler) would "reverse" the time dilation relative to me, so both our clocks would read 12:08.

Please, correct me if I'm wrong. I read this many years ago but never dove all the way into the math.

jjslocum3··on New jet fuel concept scrubs CO2 from the atmosphere
I suppose jet engines don't need to be restricted to airplanes, although I'm reminded of a long-ago Darwin Death Award involving such an attempt:

https://darwinawards.com/darwin/darwin1995-04.html

jjslocum3··on New jet fuel concept scrubs CO2 from the atmosphere
From one of the authors: "It should also remove SO₂ and chlorides from the atmosphere, and may reduce residence time of CFCs HFCs and PFCs. As far as I know, this is the only proposed alternative net-zero GHG fuel with aircraft range similar to or longer than plain hydrocarbons. (NH₃, H₂, even synthetic liquid CH₄ all have 55-90% lower energy density and require pressurization or cryogenic cooling.) The combustion product magnesia (~100 nm MgO particles) is a bodily nutrient which dissolves in lung fluids, we drink it for upset stomach and add it to drinking water to reduce acidity."
jjslocum3··on Ask HN: Why don't I see gold at the end of the remote working rainbow?
I spent the entire decade of the 2010's WFH, 1500 miles away from my company's HQ. I rose through the ranks (albeit more slowly than some of my peers), and left the company on good terms.

Thusly anecdotally armed, I can tell you that for cases towards the center of the bell curve, employees working in the office is better for the company and arguably better for the employee long-term. More shared vision, more opportunities for cross-pollination, more quick problem solving. All the usual arguments. It worked in my case, but productivity plummeted for the next guy who tried it, and we had to let him go.

It worked in my case because this was before the time when every kid expected to be able to work from home, and so I was terrified on a daily basis that out of sight would become out of mind. In the early days I made a point of traveling to HQ one week of every four, to meet the new folks and maintain relationships. I strove to overachieve so I didn't become redundant. Even so, by the end of the decade, with the growth of the company I was noticeably detached from the centers of power and the office culture, serving a role not much different from a contractor.

Not this specific post, which is reasonable and well-thought-out, but many rants I've heard by WFH proponents come across as myopic and naive. Yes, it can succeed sometimes, for some combinations of office culture and individual. Just based on my own experience, more often it doesn't.

> Generally, the stance of the WFH crowd is that each individual should get a choice of what makes that individual happy.

Salaried employment in this business (at least in the US) is a contract between you and somebody who wants to give you a lot of money, with some expectations in return. The person offering the money has the right to set the terms of that contract, and you have the right to reject that contract and work somewhere else. I view this as the actual "choice of what makes that individual happy."

Finally, let's not forget that people working in group settings is what got us here. It gave us the airplane, modern medical care, and the internet. New is sometimes better, but sometimes it's not.

jjslocum3··on C Minus Minus
When Java came out, before it stabilized, it was often jokingly called C--.
jjslocum3··on Does cashless society discriminate against the poor and elderly? (2019)
It definitely discriminates against the Salvation Army, Buskers, and Panhandlers.
jjslocum3··on Google Is Not a Search Engine – It's an Advertising Platform (2019)
> there are numerous other search engines available to any user with web access — Bing, Yahoo, and Yandex being the most popular, outside of more country-specific platforms like China’s Baidu.

Yandex is a country-specific platform. For ten years it's been referred to as "the Russian google."

jjslocum3··on Against Algebra
> ...studied the disconnect between the excitement with which kindergartners and first graders greet learning and the boredom and disaffection that seems to overtake many by high school

It seems myopic to search for the answer to this discrepancy purely within teaching styles. In high school, coincident with the onset of puberty, many students simply become more interested in achieving social goals than academic learning.

jjslocum3··on Behind the Scenes of a Twitter Censorship
This does verge on political - nevertheless it's an interesting look at how a powerful Pfizer board member was able to get a Pfizer critic banned from the platform.
jjslocum3··on Ask HN: Why does the media say inflation is up every month?
This is a timely question, given the front-page headline on this morning's WSJ: "U.S. Core Inflation Hit New Four-Decade High Last Month." Here's an excerpt:

"Prices excluding energy and food rose 6.6%

The increase marked the biggest annual rise in core prices since August 1982, a sign that persistent increases are becoming entrenched in the economy. The overall CPI rose 8.2% in September, down slightly from the previous month’s gain."

I admit I don't know enough to tease out whatever subtleties you're referencing; can you explain what about this is misleading?

jjslocum3··on Ask HN: 10k hours rule to master anything. Could I switch career when I am 43?
>asserting that the key to achieving true expertise in any skill is simply a matter of practicing.

It's been a while since I read it, but my takeaway was that the depth of familiarity brought about by 10k hours of practice in an area was just one factor of many that contributed to success. You need all those other factors in addition to the 10k hours.

I think it's just humans with our predictable penchant for distilling accurate nuance down to adjacent-but-inaccurate bullet points that created the idea that 10k hours is all it takes.

jjslocum3··on I don’t believe in sprints
Well put... Animal Farm is really about Agile.

All engineers are equal, but some are more equal than others!

jjslocum3··on I don’t believe in sprints
In the same way that few ReST implementations are truly ReSTful, few agile implementations are truly agile.

The Agile Manifesto came into style, then predictably a cottage industry of small companies grew up around it, with the business model of charging Fortune 500s huge amounts of money to train their Engineering departments. I've sat through such training before, and I can say without doubt that the day our company took "agile training" was the day we stopped being agile.

We overlaid an efficient process with a ton of bureaucratic busy work. We came out the other side of it with an army of PMs (read: Jira configuration experts). Engineers had less time to engineer, with constant flow-interrupting meetings where they became trapped in a morass of Gantt Charts, "deliverables" spreadsheets, etc.

We had many employees for whom English was a second language, and interestingly none of those I talked to realized that "agile" was an actual word, meaning "nimble, quick, dexterous." Nothing about the new process conveyed any of those qualities. It was basically classic waterfall, with stand-up meetings thrown in. Rigid project management methodology is definitionally opposed to agility.

jjslocum3··on Ask HN: Seriously, steelman this please. 7,400 employees at Docusign?
This engineer thinks good engineers are much more fungible than good salespeople. The engineer's output is worthless unless someone else can be convinced to pay for it. It will be more difficult to automate the sales function than the engineering function.
jjslocum3··on Someone is pretending to be me
I wasn't in the room, but my manager was. Is that you, Preserved Killick?
jjslocum3··on Someone is pretending to be me
In 1996, my employer got a contract to work with AT&T to build a website that provided regular event updates from the Atlanta Olympics. In 1996, this was a very big deal, such a newish concept that the project was written up in AdAge or some similar industry magazine.

A few months later a prospective junior engineer came in for an interview. My manager asked him the typical "tell me about an interesting project you've worked on lately." He then proceeded to describe in detail the very project we had just completed, even referencing the magazine article about it (he must have forgotten he was interviewing at the company mentioned in the article). At the end of his presentation, my manager said "That's interesting, because here at X, we just completed that project."

Awkward silence. Then the interviewee got up and said "I guess I should go now." My manager said "Yes, I guess you should."

Impersonation of this sort can be simultaneously disturbing and somehow comical. It isn't a new phenomenon; I'm not decided on whether I believe the information age makes it easier or more difficult.

jjslocum3··on Someone is pretending to be me
The US TV series "Impractical Jokers" ran a few sketches in the last few years where they did exactly this...you'd probably enjoy.
jjslocum3··on Gas Leak in the Baltic Sea
In this tweet from the US State Department's twitter account on 2022-01-22 (a month before the most recent invasion), a US official says: "... I want to be clear with you today. If Russia invades Ukraine, one way or another, NordStream 2 will not move forward." It's not evidence, but contextually incriminating nonetheless.

https://twitter.com/statedept/status/1486818088016355336

jjslocum3··on Who cares about diversity?
>I figured if you can understand that "alms for the poor" isn't an example of "reverse discrimination"

This is comparing apples to oranges. Alms for the poor is a personal choice: I decide to give some of my own money to someone who I think needs it more than I do.

"Reverse discrimination" in the sense you're using it refers (within this analogy) to somebody else taking your money away from you, because they believe that somebody needs it more than you do. I could write a book (others already have) about how many things can and always do go wrong with this approach.

jjslocum3··on Learning Is Remembering
The unsuccessful learning technique the author describes at the beginning of the article is essentially the LIFO "stack" data structure/algo: You learn until you encounter a gap in your understanding, upon which you push your current material onto the stack, fix the knowledge gap, then pop the parent from the stack (with additional pushing/popping along the way, as needed).

Leaving the "working-memory-max=4" hypothesis aside (I'm sure it's all true), the "stack learning" paradigm has been hugely successful for me post-classroom, and (amusingly) specifically with Quantum Mechanics.

About ten years ago, I tried to understand what QM was about, by doing exactly what the article describes, starting at Wikipedia's "Quantum Mechanics" page. I got the exact result described: no understanding of the material.

However, the search eventually led me to ocw.mit.edu, where the same LIFO-based stack learning was super effective. Along the way, a refresher calculus course (also from OCW) got pushed onto then popped from the stack, as did the course "Vibrations and Waves" and the entire Walter Lewin lecture series (he has since been removed from OCW, but can be found on youtube).

jjslocum3··on Balancing “If it ain’t broke, don’t fix it” vs. “Release early and often”
I would love to read a Malcom Gladwell book on this topic. It touches on a core truth, not only in engineering but in society as a whole. Three examples from different spheres:

In software, I've seen repeatedly how new hires with big ideas (and youthful confidence that they know a better way of doing things) will come into a company and want to rewrite things "properly." In one management position, much of my role involved the politics of defending a well-working, well-maintained, big-revenue-driving application from a steady onslaught of such ambitious exuberance.

At the time, I thought "this must be the same phenomenon that drives shrinkflation": new MBA arrives at pickle-making company, seeks to bolster their career by demonstrably saving the company millions, convinces execs to put one less pickle in each pickle jar, consumers won't notice; step 3: profit!! In 2022, when you buy a cereal box, it's half air on the inside. In 1980, it was only 20% air.

I also shake my head when media pundits equate the success of a particular congressional session with the amount of new legislation they pass. I can imagine no simpler way to cruft-paralyze a democracy (while following the rules) than "releasing laws early and often."

jjslocum3··on Nightdrive
> It's hard to classify what it is. It's not a video, because it's generated dynamically. It's not a game, because you just watch. It's not a screensaver, because it's not the 90s. Maybe it's a "demo"?

It's a simulation.

jjslocum3··on Aleksandr Sorokin smashes 24-hour world record with 198.6 mile run
You might instead try THC (technical, high-cardio) running; it takes up less of your weekend.
jjslocum3··on H-m-m: Hackers mind map
Very interesting, and does capture some of the transparency of Inspiration, in the sense that using the tool doesn't interfere with the process. Thanks for sharing this!
jjslocum3··on H-m-m: Hackers mind map
The best tool I've ever used for this no longer exists, as far as I'm aware. It was circa 1991, a spectacular lightweight Macintosh application called "Inspiration." There currently exists software in the same lane with the same name - but if there's any blood relation between the two, the current bears little resemblance to its progenitor.

I will mangle the terminology since it's been so long, but the basic idea was that on an infinite canvas you would create nodes representing concepts; these nodes were just UI "bubble" objects, like the ovals you might find in slide deck software. Relationships could be added after the fact by linking these nodes, and there was a fast way to create linked "sub-nodes" from an existing node. Also, very strong UI for arranging the node diagram.

Maybe the big problem with mind mapping tools these days is feature creep. A complex UI with too many options will absolutely get in the way of the thought process it serves.

jjslocum3··on Who cares about diversity?
Hold on, that's a misquote. "revenge driven justice" does quote me. "Against the rich" doesn't; you added it. That's a pretty big leap away from my point. Do you believe that <protected class X> is "anybody who isn't rich?"
jjslocum3··on Who cares about diversity?
I mainly agree with the OP. While they don't come out and say it, most on the DEI frontlines execute on the idea that the fix to the fact that "those people have been discriminated against, well, forever" is not to do away with discrimination completely, but rather to discriminate actively against races/genders/orientations that haven't been discriminated against in the same way.

This strikes me as faulty thinking. Revenge-driven justice fails; two wrongs don't make a right. Either you're against discrimination or you're only against discrimination against <protected class X>, which makes you a discriminator.

Anyone who followed that "Activism as a Vocation" link here a few days ago can probably agree that the fix to the current cancel-culture chaos of academia isn't going to happen within academia. It's about mass media dollars. School administrators, like the rest of us, are just manipulated "useful idiots."

jjslocum3··on What's SAP, and why's it worth $163B? (2020)
Siebel is a meaningful competitor to SAP
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