HNHacker News
TopNewBestAskShowJobs

Jeema101

765 karma · joined May 23, 2012

submissionscomments
Jeema101··on 1956 Philips 353A Bakelite Vacuum Tube Radio Repair and Restoration
>Isolation transformers do nothing for safety concerning the dangerously high DC voltages which the tubes run on.

Yes, you can still receive a fatal shock via one arm to the other even with an isolation transformer.

It's not true to say that it does nothing for safety, though. It provides isolation vs ground and prevents the circuit from being completed through your feet and the floor:

https://electronics.stackexchange.com/questions/17496/how-is...

It also limits the total current to whatever the transformer can supply before voltage starts to sag.

Jeema101··on 1956 Philips 353A Bakelite Vacuum Tube Radio Repair and Restoration
Yes it is.

This particular radio appears to have an isolation transformer which makes it somewhat safer, but some older tube radios are actually connected directly to the mains line with no isolation transformer (this was done to save costs).

Those are especially dangerous to prod around in without the proper safety precautions when they are turned on, or even just plugged into the wall.

Jeema101··on John Carmack's new AGI company, Keen Technologies, has raised a $20M round
I've also thought this, and I wish people would at least approach the subject with a little bit more humility.

It did take evolution 3.5 billion years to do it after all, so I'm not sure what makes us think we can do it in a fraction of that time.

Jeema101··on Why Nagasaki? (2013)
I've been to the USAF Museum in Dayton, Ohio, where they have the B-29 that dropped the bomb on Nagasaki.

At first glance, it's just another plane in the museum. But if you actually let yourself think about it, it's somewhat more sobering: you're looking at the actual plane that actually flew and did it. It really brings home the reality of it. And it's a bit disturbing to think that a piece of machinery can end the lives of tens of thousands of people all at once, and that humans are even capable of building such things.

Anyway just thought I'd share my experience.

Jeema101··on The World Excel Championship is being broadcast on ESPN
Don't know about you but I'm pretty pumped for BallmerCon this year.
Jeema101··on The End of Manual Transmission
Speaking of snowy roads, it's also easier (in my experience) to get a car with a manual transmission unstuck in the snow because you can quickly alternate between first gear and reverse and rock the car.

Obviously wouldn't be an issue for people who live in warmer climates, though.

Jeema101··on Huanan Seafood Market in Wuhan was early epicenter of the Covid-19 pandemic
I don't think it's a coincidence that the pandemic started in Wuhan, but probably not in the way you're thinking: Wuhan is the largest railway hub in all of China [1]. And that's likely the reason why both the institute and the market were situated there in the first place.

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

Jeema101··on Under anesthesia, where do our minds go?
I also had anesthesia for the first time as an adult, but I did kind of feel something as I was going under. It felt like my mind was melting away, and at the same time my hearing was fading out. It was kind of a pleasant feeling to be honest.
Jeema101··on Inflation rose 9.1% in June, even more than expected
I've been around since before the dot-com crash, and while "you can't time the markets" is true to some extent, some people take it as an excuse to turn their brains off entirely and ignore fundamentals.
Jeema101··on Monkeypox outbreak in U.S. is bigger than the CDC reports. Testing is 'abysmal'
The WHO's assessment does seem to suggest that it may be sexually transmitted but doesn't explicitly state it. Here's what they state:

"The clinical presentation is often atypical, with few lesions localized to the genital, perineal/perianal or peri-oral area that do not spread further, and an asynchronous rash that appears prior to the development of a prodromal phase (i.e. lymphadenopathy, fever, malaise)." [1]

[1] https://www.who.int/news/item/25-06-2022-meeting-of-the-inte...

Jeema101··on Sega Megadriver Synthesizer in Depth Look (2020) [video]
My favorite creation of his is the Furby Organ (https://www.youtube.com/watch?v=GYLBjScgb7o). Which is as insane as it sounds for anyone who's never seen it :)
Jeema101··on Vintage computer ads
I miss those days. I feel like back then computers naturally encouraged exploration and learning. There was no internet, or even modems in most cases, so there was no alternative but exploration - trying to figure out what all you could do with this strange piece of hardware.

I'm not entirely sure I'm just jaded by time - I feel like maybe computers became commodity appliances, for an entirely different crowd, but I stayed the same.

Jeema101··on Tell HN: Turned 44 today and I'm lost
>We need meaning in live. And for a long time religion gave that. But we threw that out.

This is pretty much what Nietzsche was getting at in his often misunderstood quote about 'God is dead', which is actually part of a larger 'Parable of the Madman' - see here if you've never read it, it's pretty insightful IMO: http://www.historyguide.org/europe/madman.html

Jeema101··on Blade Runner RPG
The great thing about tabletop RPGs, though, is that you're ultimately free to do whatever you want. It's the job of the dungeon master to roll with whatever the players do and possibly even change the entire narrative on the fly. In that way, tabletop RPGs are typically much less constrained compared to video game / computer RPGs.

So it's entirely possible that you could start the game as a slave catcher, but if that's not something that you actually want your character to be, then you could definitely try to escape that role! And it would be up to the DM to decide how to respond to your actions...

Jeema101··on YouTuber builds his own x-ray machine after $69k hospital bill (2021)
Yea exactly. Anyone with experience with electronics who is willing to work with high voltage and has some knowledge of vacuum tubes could probably make one.

Side note: old TV rectifier tubes from the 1950s and 60s were notoriously known for being x ray emitters, and were often made with leaded glass or kept inside shielded enclosures specifically because of the X-rays. So X-ray emitters were literally in everyday standard consumer electronics back then! Kind of crazy to think about these days...

Jeema101··on Ask HN: Why does the Ruble still hold 50% of its value?
"NATO invaded Libya and none of the NATO countries faced any sanctions"

This is not an honest take on what happened in Libya. The actions taken were initiated and sanctioned by the UN, as part of a security council resolution. Per Wikipedia:

"The United Nations Security Council passed an initial resolution on 26 February, freezing the assets of Gaddafi and his inner circle and restricting their travel, and referred the matter to the International Criminal Court for investigation. In early March, Gaddafi's forces rallied, pushed eastwards and re-took several coastal cities before reaching Benghazi. A further UN resolution authorised member states to establish and enforce a no-fly zone over Libya, and to use "all necessary measures" to prevent attacks on civilians, which turned into a bombing campaign by the forces of NATO against military installations and civilian infrastructure of Libya."

https://en.wikipedia.org/wiki/First_Libyan_Civil_War

https://en.wikipedia.org/wiki/United_Nations_Security_Counci...

Jeema101··on Prediction that Kyiv falls to Russian forces by April 2022 goes from 90% to 26%
That does seem like it's probably gonna be the trickiest part of the negotiations, doesn't it?

Zelensky has said he is open to neutrality, but the problem is that he would need some sort of security guarantees moving forward. Demilitarization of the sort Russia originally envisioned is probably out of the question in any case, so that would solve part of it.

Maybe some solution involving international peacekeepers and demilitarized zones could work. Or escape clauses where Ukraine is permitted to annul their neutrality in the event of future aggression by Russia.

Jeema101··on World War III became possible (2015)
The doctrine to use nuclear weapons in response to an overwhelming conventional attack isn't really anything that new. It originates from the early part of the Cold War when NATO had inferior conventional forces to the Red Army and were afraid they would be overrun quickly if the Soviets attacked [1].

Everything old is new again I suppose.

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

"In response to the quantitative superiority of the Soviet forces, the U.S. deployed Atomic Demolition Mines for many years in the Fulda Gap. In the early '60s, the Fulda Gap was also protected by V Corps Artillery units equipped with the medium-range MGM-5 Corporal guided missile capable of carrying nuclear warheads."

Jeema101··on Ultra-introverts who live nocturnally
When I was younger, I had a brief job working for a carpet company doing work in commercial buildings. One of the jobs I was on was recarpeting a number of floors in an office building in the downtown area where the business was. Because nighttime was the only time the building was unoccupied, that's when we had to do all the work.

I was a lowly assistant, but I really enjoyed the work. There was something very serene and calming about it all, the crew being mostly alone in this huge building, the nighttime city lights visible out the windows.

To this day it remains one of my favorite jobs I ever had, despite the fact that I now have a desk job career and make much better money.

Jeema101··on This Day in History: FDR orders Japanese Americans into internment camps
Sadly, the reason he was able to do it because it was a popular policy among the majority of the population [1]

[1] "The American public overwhelmingly approved of the Japanese-American internment measures and as a result, they were seldom opposed" https://en.wikipedia.org/wiki/Internment_of_Japanese_America...

Jeema101··on Is success tied to having rich parents?
It is indeed about perspective.

But many people who live in Western, industrialized countries have never been to a developing country, so they have no basis for comparison except what they see around them.

Even my modest apartment, which is completely mundane by Western standards, would be rather luxurious by developing world standards. It's very easy to lose sight of that sometimes.

Jeema101··on Ask HN: Have OCD, suffering from extreme procrastination, please help?
I think I understand where you are coming from because I get the same way. I get excited about a project at first, but then I think "what's the point?" and put it off.

My advice when you are feeling that way is to tell yourself "I will work on this for just 10 or 15 minutes and then if I feel like it, I will stop." That way you aren't under any pressure.

I find this works because it's harder to get motivated when you are putting a lot of pressure on yourself to spend hours working on something. Instead just commit to a little bit - if you enjoy it, then keep going. If not, no big deal - at least you did did a little bit. Maybe tomorrow you'll want to do more.

Jeema101··on The Long Long Covid Post
The entire thing seems handwavey to the point of "don't believe your lying eyes". The author is basically saying we need to ignore people's self-reported incidence of having Long Covid.

This quote in particular seems rather ironic in light of the current labor shortage: "Do we see evidence of the types of sweeping changes we’d expect to see if several percent of people are suddenly unable to work? No, we don’t."

Jeema101··on The Federal Reserve Is About to Give US Workers the Shaft
He seems to be admitting that inflation is high, and yet saying we should do nothing.

This is precisely what was said by policymakers in the early 1970s who were saying pretty much the same thing back then: we can't act on inflation because it will hurt the labor market.

This of course resulted in inflation becoming more and more firmly entrenched until their WAS a wage-price spiral that was very hard to break. It then look the new Federal Reserve chairman more than a decade of trying to get it under control, and ultimately, it was only done through sky-high interest rates that caused 2 bad recessions. Most of that pain could have been avoided had they just acted more decisively in the early 70s.

And now here we are again decades later with the worst inflation in 40 years and some people saying we should just 'let it ride and see what happens'! Well we already know what happens if history is any indication.

Jeema101··on YouTube ranks “wholesome and funny” comments higher?
It's fine if you think that attempting to remove toxic content amounts to censorship - you have a right to that opinion - but it doesn't change the fact that the toxicity itself still exists. But are you also angry at the people in society who create that toxicity or just the people trying to control it?
Jeema101··on Si78c: Memory-accurate reimplementation of Space Invaders in C
I admire the dedication to projects like this.

First you have to (or someone else has to) disassemble the original binary, since the original source code is usually long gone.

Then you have to actually go through the code to try to understand it all - this is difficult to do in a high level language, but even more so in assembly. Even if it's already disassembled and someone else has already added comments it's still not easy.

If you don't already know the ASM language being used, you have to also learn that as you go.

Only once you have a complete understanding of the ASM code can you even begin reimplementing it in C.

Then you have to test it and make sure it actually functions like the original.

Jeema101··on Francis Fukuyama – Against Identity Politics
Did you actually read it, though? He says "there is nothing wrong with identity politics as such; it is a natural and inevitable response to injustice. But the tendency of identity politics to focus on cultural issues has diverted energy and attention away from serious thinking on the part of progressives about how to reverse the 30-year trend in most liberal democracies toward greater socioeconomic inequality."
Jeema101··on Twitter Permanently Suspends Marjorie Taylor Greene’s Account
"The majority ruled that the Freedom of the Press clause of the First Amendment protects associations of individuals in addition to individual speakers, and further that the First Amendment does not allow prohibitions of speech based on the identity of the speaker. Corporations, as associations of individuals, therefore have free speech rights under the First Amendment. "

https://en.wikipedia.org/wiki/Citizens_United_v._FEC

Jeema101··on Why is U.S. labor supply so low?
The US Census Bureau basically said as much recently. Their findings from October stated that 3.7 million people in the US were currently unemployed because they were "caring for someone or sick myself with coronavirus symptoms" [1]

[1] https://www2.census.gov/programs-surveys/demo/tables/hhp/202...

Edit: to clarify, a lot of those 3.7 million people are probably suffering from acute Covid, but if you look back at the older survey data, the number of people not working due to "coronavirus symptoms" still seems to remain pretty high even when cases are low.

Jeema101··on The riddle of Japan's dramatic drop in Covid numbers
That rumor seems to have originated with a right-wing American broadcaster, but more importantly, ivermectin isn't approved for use as a Covid treatment in Japan:

https://www.newshub.co.nz/home/world/2021/11/coronavirus-fac...

← PreviousPage 3 of 9Next →