u/Reichstein

I have a question about IR radiation (specifically FIR).

Does something being in physical contact with an IR (or FIR) source prevent the emission of radiation?

---

Origin of question

I was asking about some heated gloves on another subreddit, and a commenter stated that the manufacturers claims of the gloves using FIR to help with heat penetration was crap.

https://old.reddit.com/r/BuyItForLife/comments/1ueapu2/are_avert_20_heated_liners_any_good/

They stated the following.

>I think the far IR thing is crap. There's no radiation inside the gloves because there's no empty space inside the gloves. There's just direct transmission, i.e. physical contact. The third way to transport heat is by convection). Radiation only occurs across empty space.

My response.

>As far as I can tell the IR claim looks totally plausible. Carbon fiber is good at turning electricity into FIR radiation, and the heating elements are carbon fiber, so that tracks.

>You don't actually need empty space for radiation to still be a thing. Any object that is warm will emit some amount of heat as radiation. Conduction and convection are more effective forms of heat transmission, so would likely be more noticable, but the radiation is still there. However I don't know how much of a difference the FIR emission would actually make.

>FIR does penetrate human tissue, and is commonly used in therapeutic settings, but it's effectiveness in this case would really come down to how much energy is being re-emitted as FIR vs just heating up the element.

Their response to my response.

>Yes, FIR does prenetrate if it's radiating, but there's no radiating inside the glove. It's like saying the raisins in a fruit cake could radiate FIR to the pan.

>So no, the radiation isn't there. It's not that it's weaker, it doesn't happen at all. The inisde of the glove is touching her skin. Virtually no radiation.

>Maybe check with a physics sub if you're doubtful.

Me again.

>As far as I understand it (and maybe I'm wrong) but anything with a temp above absolute zero emits some form of radiant heat. Touching it does not stop that.

>So, the raisins would be emitting some amount of radiant heat. I doubt that it would go very far, being surrounded by cake, but it would be there (but again, maybe I'm totally wrong about this).

>I am actually kinda curious what the correct answer to this is. I think I might just go ask on a physics sub.

---

That brings us to now :)

I'm curious what the correct answer is for this one, so here I am. Hopefully some smart folks here can inform me about how this actually works.

Am I wrong? Are they wrong? Are we both wrong?

I have a question about IR radiation (specifically FIR).

Does something being in physical contact with an IR (or FIR) source prevent the emission of radiation?

---

Origin of question

I was asking about some heated gloves on another subreddit, and a commenter stated that the manufacturers claims of the gloves using FIR to help with heat penetration was crap.

https://old.reddit.com/r/BuyItForLife/comments/1ueapu2/are_avert_20_heated_liners_any_good/

They stated the following.

>I think the far IR thing is crap. There's no radiation inside the gloves because there's no empty space inside the gloves. There's just direct transmission, i.e. physical contact. The third way to transport heat is by convection). Radiation only occurs across empty space.

My response.

>As far as I can tell the IR claim looks totally plausible. Carbon fiber is good at turning electricity into FIR radiation, and the heating elements are carbon fiber, so that tracks.

>You don't actually need empty space for radiation to still be a thing. Any object that is warm will emit some amount of heat as radiation. Conduction and convection are more effective forms of heat transmission, so would likely be more noticable, but the radiation is still there. However I don't know how much of a difference the FIR emission would actually make.

>FIR does penetrate human tissue, and is commonly used in therapeutic settings, but it's effectiveness in this case would really come down to how much energy is being re-emitted as FIR vs just heating up the element.

Their response to my response.

>Yes, FIR does prenetrate if it's radiating, but there's no radiating inside the glove. It's like saying the raisins in a fruit cake could radiate FIR to the pan.

>So no, the radiation isn't there. It's not that it's weaker, it doesn't happen at all. The inisde of the glove is touching her skin. Virtually no radiation.

>Maybe check with a physics sub if you're doubtful.

Me again.

>As far as I understand it (and maybe I'm wrong) but anything with a temp above absolute zero emits some form of radiant heat. Touching it does not stop that.

>So, the raisins would be emitting some amount of radiant heat. I doubt that it would go very far, being surrounded by cake, but it would be there (but again, maybe I'm totally wrong about this).

>I am actually kinda curious what the correct answer to this is. I think I might just go ask on a physics sub.

---

That brings us to now :)

I'm curious what the correct answer is for this one, so here I am. Hopefully some smart folks here can inform me about how this actually works.

Am I wrong? Are they wrong? Are we both wrong?

I'm helping my Mum try to find some good heated gloves to help with her Raynaud's Syndrome (googling around led me here), and we are looking at the "Avert 2.0 Battery Heated Glove Liners" from Zarkie.

Has anyone here had experience with these?

I'm specifically looking for info on their reliability. We don't want to get something that is just going to fail in a few months.

Feedback from folks who have these would be great. Do they work well? Are they a quality product? Is there another option that would be better in some way?

She wants something that is thin enough to have decent dexterity, allows using a phone without needing to take them off, provides warmth, and is reliable.

I'm helping my Mum try to find some good heated gloves to help with her Raynaud's Syndrome (googling around led me here), and we are looking at the "Avert 2.0 Battery Heated Glove Liners" from Zarkie.

Has anyone here had experience with these?

I'm specifically looking for info on their reliability. We don't want to get something that is just going to fail in a few months.

Feedback from folks who have these would be great. Do they work well? Are they a quality product? Is there another option that would be better in some way?

She wants something that is thin enough to have decent dexterity, allows using a phone without needing to take them off, provides warmth, and is reliable.

I'm helping my Mum try to find some good heated gloves to help with her Raynaud's Syndrome (googling around led me here), and we are looking at the "Avert 2.0 Battery Heated Glove Liners" from Zarkie.

Has anyone here had experience with these?

I'm specifically looking for info on their reliability. We don't want to get something that is just going to fail in a few months.

Feedback from folks who have these would be great. Do they work well? Are they a quality product? Is there another option that would be better in some way?

She wants something that is thin enough to have decent dexterity, allows using a phone without needing to take them off, provides warmth, and is reliable.

I would like Calibre to store what percent of each book I have read, so I followed a guide to get it to do that, but it seems to be behaving strangely.

The values that show up in the "Kobo Percentage Read" column are kinda wacky. For example, one long web-novel that I have opened, but not actually read has a value of 879193, while a short comic that I have actually finished has a value of 540, and a traditional novel that I have also finished shows 9.

Obviously these values are not percentages, and are all over the place.

I'm not sure what I have done wrong, or how to fix it.

If anyone has a link to a guide that shows the proper way to set this up that would be great. But any help would be appreciated.