m0darn

joined 2 years ago
[–] m0darn@lemmy.ca 4 points 21 hours ago (1 children)

I think you still haven't provided enough context:

They played each other earlier in the tournament in Canada and the Canadian fans booed the US national anthem

...due to America's leader denying Canada's sovereignty, and launching a tariff regime intended to cripple Canada's economy.

In this game the Americans booed Canada's national anthem, while in a sense retaliatory is also a doubling down and refusal to acknowledge the legitimacy of Canada's grievance.

[–] m0darn@lemmy.ca 1 points 1 day ago

Okay I did the same calculation but with Martian orbit as dyson sphere size, and 50% efficiency I got a wavelength of 3.4um so nicely in the infrared range of JWST.

I think the sphere would need to be like 99.95% efficient to be undetectable by JWST at Martian orbit radius.

[–] m0darn@lemmy.ca 1 points 1 day ago* (last edited 1 day ago) (1 children)

Edit to add disclaimer: this is shitpost level math here guys, I'm just spitballing.

It would definitely emit thermal radiation. if it was 99% efficient and the size of pluto's orbit, around a star like the sun, and the energy was used to create matter, I think it would radiate the remaining energy as 0.009 W/m2 with a peak emission wavelength of 150micrometers. The James Webb telescope has infrared capabilities that max out at 28.5 micrometers so def not detectable.

But probably a dyson sphere would be smaller than pluto's orbit, which would greatly increase the apparent power, and shorten the wavelength. idk it's all imaginary.

I won't subject you to my hand writing but I did (power of sun × 0.01)/(surface area of sphere with Pluto's orbital radius) to get radiation intensity (0.009 W/m2). Then rearranged Stefan-Boltzmann law to solve for temperature (19.8K). Then used Wien's Displacement Law to calculate the peak wavelength (1.5×10^-4^ m).

Maybe I'll run the numbers again with a martian orbit radius, and 50% efficiency.

[–] m0darn@lemmy.ca 1 points 2 days ago* (last edited 2 days ago)

Like I'm sure it's not but I don't know if it's a worse explanation than any of the other ideas being considered. But I don't know enough to even know how wrong I am.

[–] m0darn@lemmy.ca 6 points 3 days ago

Which part of the image advances genocide? What is it in the post that you think suits the purpose of far left wackos?

[–] m0darn@lemmy.ca 4 points 3 days ago (6 children)

Is dark matter just Dyson sphered stars?

[–] m0darn@lemmy.ca 41 points 4 days ago (3 children)

I successfully submitted for a short term disability claim for an anxiety condition that arose from my ADHD. A few weeks later I was told that there wouldn't be a role for me to return to once I was recovered. IE in an attempt to avoid a nasty law suit they aren't firing me until I'm off short term disability.

Talk about setting up adverse conditions for recovery!

[–] m0darn@lemmy.ca 8 points 6 days ago

I was pretty skeptical of them when I clicked "Technology Connections" video on them. It's the same thing as a convection oven, what's the big deal?

Well it's the same just like how a quadcopter drone is the same thing as a RC dual rotor helicopter

It's like yeah they're the same thing, but they have some important differences too.

[–] m0darn@lemmy.ca 11 points 1 week ago (1 children)

I appreciate your point. A few months ago I was in a discussion with someone on Lemmy about the strategy of maliciously complying with someone that has insincerely stated a preference for neo-pronouns. The example in the discussion was Elon Musk claiming "prosecute/Fauci" as pronouns, but insincere pronouns aren't necessarily so easily spotted. (My position was and is that it's okay to maliciously comply with someone's professed pronouns to demonstrate that person's insincerity)

If you're not tired of tutoring ignorant allies I'd really appreciate your opinion on that dilemma.

[–] m0darn@lemmy.ca 5 points 1 week ago

I have inattentive type adhd as well, and was also diagnosed as an adult. I think It's normal to feel frustrated/disheartened as you grapple with it. I also recently mentioned to someone that I think I may have an emotional range that's narrower than typical.

My wife, doctor, occupational therapist (I'm on short term disability because my I developed an anxiety problem that was causing me to spiral), and lawyer (I was told there isn't a job for me to come back to when I'm better) all delicately danced around the prospect of depression/suidality. I'm lucky that I have some great things in my life that make it easy to tackle those questions head on.

Talk to a specialist.

[–] m0darn@lemmy.ca 6 points 2 weeks ago

The only things i look for in a shoe are small pieces of gravel that sometimes get in there.

But seriously: comfort/ support, and a big 'Ole loop on the back to make them easy to pull on.

[–] m0darn@lemmy.ca 15 points 2 weeks ago (1 children)

Reminds me of the middle third of a song by propagandhi from their 1993 album "how to clean everything"

An amalgamation of jewish scripture and christian thought. 
What will that get you? Not a fuck of a lot.
 Take a look at your promised land. 
Your deed is that gun in your hand. 
Mt. Zion’s a minefield, The West Bank, The Gaza strip… 
Soon to be parking lots...
for American tourists and fascist cops. 
Fuck zionism. 
Fuck militarism. 
Fuck americanism. 
Fuck nationalism. 
Fuck religion.

The last third of the song is them just singing fuck religion over and over again. The first third is about rastafarianism.

 

My 6 year old son has been skateboarding for almost a year, he likes it a lot and I'm very proud of him. I've filled up my phone taking videos of him.

He's approaching the age where he'll be able to skateboard at the school without me, and while I'm happy to go watch him often, I recognize he won't always want me there supervising.

I'd like him to be able to film himself, can anyone weigh in on good options for him? The idea is mostly to document, and to review so he can see that he is achieving his goals etc. Picture quality is not really required for those goals.

I think these are what would be good:

-easy to control -easy to aim -Easy to review footage -robust (I'd also like to be able to take it skiing) -slow motion mode (he loves seeing slow motion videos from my phone)

Do you guys have any pointers I haven't thought of? Any recommendations? Go-pro? Insta 360? Idk....

 

I'm not saying that it's likely or that it would have any effects.

20
submitted 4 months ago* (last edited 4 months ago) by m0darn@lemmy.ca to c/askscience@lemmy.world
 

I live in Vancouver Canada, my house was built in the 1950's and the basement has the floor joists of the kitchen [above it] exposed.

At that time forestry here was felling massive ancient trees. I'm curious how precisely I can establish a maximum age of the trees felled.

Obviously I could count the rings visible on the joists and subtract that number from 1950, but not having the tree's full diameter limits measurement. I understand it's possible to compare relative ring sizes with existing [cross referenced] data sets to date timber.

Does anyone have any experience doing this or able to point me in the right direction? Any resources I'm unlikely to find on Google?

 

I'm trying to achieve variable speed control on two brushed DC motors powered by a 3s or 4s LiPo battery (~12V or 15V). This is for a nerf blaster I'm modifying, which is why I'm not using a pre-made speed control ie I want control over the shape/layout. I'd like to vary projectile speed with a thumb knob.

I just finished watching ElectricMonkeyBrain's YouTube video on the TL494 PWM chip.

I was initially planning to vary the duty cycle with a potentiometer on the chip's control pin, to get a PWM signal and feed that into a MOSFET. But in the video he mentions that the chip has an integrated over current protection function. Ie the chip will

monitor the voltage across a sense resistor in series with the load 

and will

kill the output if the sensed voltage/current goes above a reference voltage

It occured to me that I could actually adjust the reference voltage as a way to control the motor speed.

Would this be a better way to achieve speed control and protect my motors/battery? Or is it a terrible idea altogether.

 

I have recently rewatched the movies Inside Out and Home Alone, having previously seen them while childless (I.O. as a young adult, H.A. many times at various ages).

The parental behavior draws a lot more of my attention, and it really changes the movie for me.

The parental panic when they don't know where their kid is, or if they're safe, just hits so much harder. Like, it's not that I didn't understand the movie before, I guess I just have a new appreciation for the parents emotions.

Are there any other movies that you appreciate differently now that you have different experiences?

 

I know this isn't build a pc, but everything over there is so gaming oriented I thought I might get better advice here.

I'm a noob that wants a home media server for sharing photos of my kids with my family (across the country), video library sharing to some family members, and streaming my music collection to my phone (and maybe my dad's).

But I'm considering ripping my father in laws extensive bluray collection (well seeing it up so he can rip them into my library) so I reckon a full tower is required for HDDs.

I'm imagining unraid, with a big pile of used drives. What I like about that approach is that I can economically add storage as the video library grows as I/we rip. Or are used HDDs a false economy.

I think the only processing intensive thing in the use case list is ripping and video library sharing. I have no concept of what sort of processing is required. Should I get a graphics card?

There's a Lenovo TS-140 (E3-1226 V3) available available used for $80 Canadian. Is that a good place to start?

I

 

My friend John mentioned that he has been feeling depressed lately. There have been some bad things in his logs that would make anyone sad but the things that normally bring him happiness aren't doing anything for him lately. It's something he has struggled with in the past. He has a counselor and has been prescribed anti-depressants. I'm not worried about him harming himself.

My understanding is that part of being a friend to someone facing depression is reaching out to spend time with them.

How much should I reach out? I don't want to harass him, and he has a wife and other friends (that are emotionally closer than me). His wife for sure knows what's going on, but I'm not sure about his other friends (our kids go to the same school so I actually see him more then most of his friends).

I understand that sometimes depressed people neglect chores in their life, should I ask his wife if there's anything I could help him/them with?

 

The bake off one:

Sister in laws:

 

I glove you.

 

My neighbour (40/m) ("N") confided that his recently retired father (70/m) ("G") has started going to the casino twice a day (all day but he comes home for dinner).

G's losses affect the food they eat (multi generational household).

N doesn't really know what to do. I'm not so concerned for N, moreso his mother/G's wife.

It's not my business but, when I was a kid my boyscout leader committed suicide after gambling away his house so I'm pretty sensitive to this sort of thing. I'd like to help if I can.

Any advice?

 

I'm having trouble wrapping my head around the scale of the problem of nuclear waste. If we took all the nuclear waste produced in a year and evenly blended it into all gasoline burned in a year would the radiation be deadly? Dangerous? Detectable?

It's easiest to get numbers for the US.

2 000 000 kg of waste per year

510 000 000 000 Liters of gasoline

Obviously this isn't a real proposal, although I think it would reduce carbon emissions...

 

Wikipedia says

A superhero or superheroine is a stock character that typically possesses superpowers, abilities beyond those of ordinary people, and fits the role of the hero, typically using their powers to help the world become a better place, or dedicating themselves to protecting the public and fighting crime.

So yes, he is definitely dedicated to protecting the public, but it feels wrong to call him a super hero. What do you think?

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