m0darn

joined 1 year ago
[–] [email protected] 1 points 6 hours ago

I think its like any other utility (water or electricity or methane) except that you pay for the generation separately. So imagine that for electricity you pay a service fee to the grid operator to keep your connection capable of a certain amperage, and you separately pay the hydroelectric dam for the power you use.

ISPs are the grid operator saying, yes you pay for 200 amp service but you've already bought enough power this month. Don't run your AC for the rest of the month.

[–] [email protected] 1 points 7 hours ago

My first thought was a mixture of wax, Sand and aluminum shavings. But wax isn't that inert

[–] [email protected] 4 points 1 day ago (1 children)

I don't think endangering people is a good idea.

I'm surprised we haven't seen more infrastructure sabotage from ecoactivists. Train rails out of coal mines and into coal ports seem pretty vulnerable to acts that would reduce the profitability of burning coal.

[–] [email protected] 5 points 2 days ago

"Pricing according to market conditions"

20
submitted 2 days ago* (last edited 2 days ago) by [email protected] to c/[email protected]
 

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?

[–] [email protected] 2 points 2 days ago

I think it's a neat idea. I've responded to a few other commenters with my thoughts too, so check the thread.

[–] [email protected] 1 points 2 days ago

Would this more intricate engineering result in a noticeably better product for the average guitarist? Would it just be a niche curiosity for audiophiles and engineers?

This is AskSCIENCE so it's not surprising that you would approach the musings from this perspective.

But OPs idea is about the intersection of science and art. I think the question is really: Would some of these ideas result in an output signal that was controllable in a new way?

Imo this modification would empower an artist to interact with their guitar in a novel and creative way? Do I think we'll see mass adoption, no, but I think there are definitely people out there that would be interested in playing a guitar with pickups like this. Even if it's just part of their creative process.

[–] [email protected] 2 points 2 days ago

I think OP is interested in the role of oscillation planes because with an acoustic guitar, exciting a string parallel (lateral) to the guitar vs perpendicular to the guitar has a perceptible difference in tone.

OP believes that this difference isn't captured by common electric guitar pickups.

From what I've read in this thread common pickups measure the speed of the string, basically considering both planes of vibration the same. But an acoustic guitar responds more to the perpendicular oscillations than the lateral oscillations. (Because the perpendicular plane oscillations tends to work the bridge/soundboard, and push air towards and away from the sound hole).

Although I agree that ultimately the string's oscillation is pretty much circular/cylindrical/bi-conical, but I suspect there is a significant transient effect that could be explored/exploited with redesigned pickups.

I'm also curious if it would be possible to use a string with a [section of] non-circular cross section to allow the [creation and] detection of torsional vibrations.

[–] [email protected] 1 points 3 days ago

It's a bad look man

[–] [email protected] 1 points 4 days ago (2 children)

I asked:

Would a strategy of making life in Palestine so difficult that everyone either capitulates or becomes radicalized [and therefore a legitimate military target] be genocide?

You answered "no". Can you elaborate on how you reconcile your answer with our understanding of genocide:

Genocide is the attempt to destroy a nation/ ethnicity.

[–] [email protected] 1 points 4 days ago (4 children)

Would a strategy of making life in Palestine so difficult that everyone either capitulates or becomes radicalized [and therefore a legitimate military target] be genocide?

What would that strategy look like?

[–] [email protected] 1 points 5 days ago (6 children)

Do you think Israel has an interest in there not being a Palestinian nation?

[–] [email protected] 1 points 6 days ago (1 children)

I've also gotten the sense of a major schism between Jesse and the employees. I don't keep track of which employee has what views do in not really sure what you mean by Jan Wong's red scare.

I don't think Jesse was amplifying Israel's bullshit, I think he was pushing back against it.

I don't know if it's drifting right or not.

16
submitted 1 week ago* (last edited 1 week ago) by [email protected] to c/[email protected]
 

...and a fact check of the statements made in the interview.

 

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 met a Ukrainian today. He is my age. I met him at school drop off, our sons are in the same kindergarten class.

They recently arrived here from overseas. I welcome them, but I wish we had done more to help Ukraine.

There are numerous places in the world where people are being displaced by state violence, but I don't think there's anywhere that it's being done by a global power so directly. It's similar to Gaza/Palestine & Israel, but Russia can end the war by simply going home.

If we had been meeting our NATO obligations for the last 30 years, would this family have been driven out of their home? I don't know. (I actually know almost nothing about their personal circumstances)

I just feel like we should have done more, and that it's not too late.

 

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

 

The cyclist was riding on the sidewalk, and ran a red light (a bit more justified to flag him down). He fled, eventually ditching the bike and fleeing by foot.

I hope the police didn't screw up by performing an unjustified search.

 

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?

 

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?

2
submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]
 

This goose has adopted my parents, and is attempting to establish residency in their cabin. We suspect it is domestic and escaped from its coop. It's a seasonal cabin and they're planning to close up soon. What should they do? Central Ontario. Near Bracebridge.

UPDATE: A neighbor of theirs is set up for chickens, so could accommodate a goose. And shortly after making that arrangement an ad appeared in the community message board. So the goose is going home.

 

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...

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