Steve Jackson Games - Site Navigation
Home General Info Follow Us Search Illuminator Store Forums What's New Other Games Ogre GURPS Munchkin Our Games: Home

Go Back   Steve Jackson Games Forums > Roleplaying > GURPS

Reply
 
Thread Tools Display Modes
Old 09-29-2016, 09:31 AM   #31
vicky_molokh
GURPS FAQ Keeper
 
vicky_molokh's Avatar
 
Join Date: Mar 2006
Location: Kyïv, Ukraine
Default Re: Semi-realistic Regeneration and corresponding Increased Consumption

Quote:
Originally Posted by Bruno View Post
Since you're talking about nanites, other options would be things artificial sources, like a battery pack or more high-energy reactions that would be dangerous to do right in the circulatory system but could be done in little "reactor units" distributed around the body. By reactor I mean chemical reactor, not nuclear - I don't think you want RTGs in your body at any TL :D
Well, I am, a bit, but that's something of a . . . necessary analogy, because the original TL10 Regular Regeneration biomod comes from nano. I'm actually trying to get something more plausible-sounding and less cliché. A borderline organic construct that is halfway between blood cells and nanites is approximately what I'm hoping for. Things are meant to be weird-sciencey, with mild TL^, but not something as drastic as ignoring conservation of energy. It's meant to be based on rare and weird divergent strain of humanoids of the setting (who tend to have both detrimental and beneficial mutations). Great Old Entities are involved by proxy, but the overall style of the setting/campaign is meant to be soft sci-fi//science-fantasy, not pure fantasy/horror. I'm not sure how many of these details are relevant/interesting/useful for this discussion.

Stuff that says that recipients really should get Resistant to Metabolic Hazards too if they want to use it is actually appropriate for this invention.
__________________
Vicky 'Molokh', GURPS FAQ and uFAQ Keeper
vicky_molokh is offline   Reply With Quote
Old 09-29-2016, 09:34 AM   #32
Flyndaran
Untagged
 
Join Date: Oct 2004
Location: Forest Grove, Beaverton, Oregon
Default Re: Semi-realistic Regeneration and corresponding Increased Consumption

Quote:
Originally Posted by vicky_molokh View Post
...
I don't recall the precise numbers, but IIRC ('normal') sugars don't provide an enormous storage efficiency advantage, so might need to think of something else. Quick wiki check gives sugars 17MJ/kg, while fats get 37.

Even ethanol has only 26. Though a hacked metabolism that can safely handle lots of alcohol and use its energy to fuel ATP production would be amusing.
...
Most likely the biggest reason why most animals store most energy as fat is more due to how it's possible to store it in pure form. Sugars are so water hungry that you end up storing far fewer calories per gram than fat when you include the dead weight.
I imagine concentrated ethanol has its own problems.
Then again, making your very tissues toxic to most other organisms even if it costs you something in return isn't inherently a bad design.
__________________
Beware, poor communication skills. No offense intended. If offended, it just means that I failed my writing skill check.
Flyndaran is offline   Reply With Quote
Old 09-29-2016, 09:39 AM   #33
Flyndaran
Untagged
 
Join Date: Oct 2004
Location: Forest Grove, Beaverton, Oregon
Default Re: Semi-realistic Regeneration and corresponding Increased Consumption

Quote:
Originally Posted by Bruno View Post
I was suggesting sugars because you specified "not fat", but mobilizing fat reserves has more potential for liver failure. Malnutrition causes mobilization of fat, which can choke the liver, leading to fatty liver, and then we're back to liver failure again. Plus pressure of your engorged liver on your other abdominal organs and the enormous amount of heat being produced by your liver struggling to process everything (which is wasted calories and also gives you a fever).
Using loads of protein for calories blows out organs from all the excess nitrogenous waste.
There really are good reasons why carbs are the go to foods for most omnivores. We diabetics not included. ;)
But even I feel the pinch as it seems to take more effort to bring my reserves to bear than it did before the -betus. Possibly unrelated and anecdotal of course.
For hummingbird level metabolic activity that super regen. would require though, boat tons of sugar seem about the most plausible fuel.
__________________
Beware, poor communication skills. No offense intended. If offended, it just means that I failed my writing skill check.
Flyndaran is offline   Reply With Quote
Old 09-29-2016, 09:43 AM   #34
vicky_molokh
GURPS FAQ Keeper
 
vicky_molokh's Avatar
 
Join Date: Mar 2006
Location: Kyïv, Ukraine
Default Re: Semi-realistic Regeneration and corresponding Increased Consumption

Quote:
Originally Posted by Flyndaran View Post
Most likely the biggest reason why most animals store most energy as fat is more due to how it's possible to store it in pure form. Sugars are so water hungry that you end up storing far fewer calories per gram than fat when you include the dead weight.
I imagine concentrated ethanol has its own problems.
Then again, making your very tissues toxic to most other organisms even if it costs you something in return isn't inherently a bad design.
Ethanol doesn't seem particularly energy-dense. The idea of recharging by consumption of large amounts of ethanol is amusing, though. And yeah, tissues being toxic (by our standards, that is) is quite par for the course for many lifeforms of the afflicted area. But many of those solutions would not be suitable for biomods installed into more human-like humanoids, since they would require replacing all cells with more robust ones. Now, dumping toxings into blood as byproducts and having them immediately handled by the boosted filtration systems - that's about perfect from the conceptual PoV.
__________________
Vicky 'Molokh', GURPS FAQ and uFAQ Keeper
vicky_molokh is offline   Reply With Quote
Old 09-29-2016, 09:47 AM   #35
Flyndaran
Untagged
 
Join Date: Oct 2004
Location: Forest Grove, Beaverton, Oregon
Default Re: Semi-realistic Regeneration and corresponding Increased Consumption

Quote:
Originally Posted by vicky_molokh View Post
Oh well, I was hoping for something that is better than fats, but I guess that's not much of an option. Not with anything resembling mammalian biochemistry, it seems. I'll have to break out the bio-alchemy then. And liver upgrades.
A pound of fat optimally has around 3600 Calories. How much energy is your character needing that that density of storage won't keep him going between meals?
I think men can go down to around 5% body fat safely, and no one's calling one with 15% unhealthy. That gives a full 10% to play with. For Gurps 150 lb, that's a full 15 times 3600 or 54000 Calories storage. Multiplied by 4.184 means over a quarter of a million kilojoules.
Assuming I did my basic math correctly.
__________________
Beware, poor communication skills. No offense intended. If offended, it just means that I failed my writing skill check.
Flyndaran is offline   Reply With Quote
Old 09-29-2016, 09:50 AM   #36
Flyndaran
Untagged
 
Join Date: Oct 2004
Location: Forest Grove, Beaverton, Oregon
Default Re: Semi-realistic Regeneration and corresponding Increased Consumption

Quote:
Originally Posted by vicky_molokh View Post
Ethanol doesn't seem particularly energy-dense. The idea of recharging by consumption of large amounts of ethanol is amusing, though. And yeah, tissues being toxic (by our standards, that is) is quite par for the course for many lifeforms of the afflicted area. But many of those solutions would not be suitable for biomods installed into more human-like humanoids, since they would require replacing all cells with more robust ones. Now, dumping toxings into blood as byproducts and having them immediately handled by the boosted filtration systems - that's about perfect from the conceptual PoV.
Well, only our stomachs can handle such a low pH, so it might be possible to create a very insulated organ for ethanol storage. But risky as heck, I agree.

If you want something that's going to cause major total body effects, it seems difficult to implausible not to have to screw around with all tissues in some ways.
__________________
Beware, poor communication skills. No offense intended. If offended, it just means that I failed my writing skill check.
Flyndaran is offline   Reply With Quote
Old 09-29-2016, 10:02 AM   #37
vicky_molokh
GURPS FAQ Keeper
 
vicky_molokh's Avatar
 
Join Date: Mar 2006
Location: Kyïv, Ukraine
Default Re: Semi-realistic Regeneration and corresponding Increased Consumption

Quote:
Originally Posted by Flyndaran View Post
A pound of fat optimally has around 3600 Calories. How much energy is your character needing that that density of storage won't keep him going between meals?
I think men can go down to around 5% body fat safely, and no one's calling one with 15% unhealthy. That gives a full 10% to play with. For Gurps 150 lb, that's a full 15 times 3600 or 54000 Calories storage. Multiplied by 4.184 means over a quarter of a million kilojoules.
Assuming I did my basic math correctly.
How much energy (and materials) is needed is a hard question, which some people above attempted to answer. Anthony's approximate calculations seem to yield a requirement of extra 15 meals per nychthemeron of regeneration (about 24-25 HP).

Carrying 15 meals worth of energy and nutrients seems like it'll be no less than (¼ lbs × 15) = 3¾ lbs per day of supply. Which seems . . . very noticeably more than the typical day-to-day mass change (most of which is water anyway), but about plausible for a boosted organism.

There is however one interesting side effect of such an ability:
if the organism can store and 'pull out' this much stuff from storage on a short notice for regeneration, it stands to reason that it can also be used by the organism to mitigate FP loss from starvation equivalent to those same 15 meals. Which is actually a lot, essentially comparable to 5 days of Doesn't Eat that can be 'recharged'.
__________________
Vicky 'Molokh', GURPS FAQ and uFAQ Keeper
vicky_molokh is offline   Reply With Quote
Old 09-29-2016, 10:12 AM   #38
vicky_molokh
GURPS FAQ Keeper
 
vicky_molokh's Avatar
 
Join Date: Mar 2006
Location: Kyïv, Ukraine
Default Re: Semi-realistic Regeneration and corresponding Increased Consumption

Quote:
Originally Posted by Flyndaran View Post
Well, only our stomachs can handle such a low pH, so it might be possible to create a very insulated organ for ethanol storage. But risky as heck, I agree.

If you want something that's going to cause major total body effects, it seems difficult to implausible not to have to screw around with all tissues in some ways.
Ethanol is only 26MJ/kg, compared to fat's 37. So it's no good for storage, only for quick delivery. As I said, getting some extra energy by rapidly consuming ethanol, and having the the boosted inhuman-garbage-collector blood cells quickly clean up all the byproducts (and sending them on their way out) would be an amusing detail, but that's probably about it.

Also, there's a difference between stuff that permeates all tissues and stuff that only accumulates in large amounts in specialized cells. E.g. the concentration of oxygen in erythrocytes would probably be unhealthy for some other tissues, even while smaller concentrations of it are quite necessary for all or nearly all cells.
__________________
Vicky 'Molokh', GURPS FAQ and uFAQ Keeper
vicky_molokh is offline   Reply With Quote
Old 09-29-2016, 11:24 AM   #39
Bruno
 
Bruno's Avatar
 
Join Date: Sep 2004
Location: Canada
Default Re: Semi-realistic Regeneration and corresponding Increased Consumption

Some fruitbats can more-or-less properly digest alcohol (I understand it's not so much that they don't produce the toxic byproducts, and more that they tolerate the toxic byproducts). They aren't inedible either, at least as far as I know.

I assume many fruit-colonizing insects can tolerate at least some of their diet being alcohol too, at least for the phase of their lifecycle where they live in the fruit. Otherwise they'd be pretty screwed.

Your regeneration doesn't necessarily need to be powered by booze, if the organism simply uses alcohol as one nutrition source of many to build back up and/or maintain its fat reserves for the next bout of regeneration.

Fat is more calorie dense than sugars or alcohols, but digesting lots of fat takes specialized anatomy. Polar bears take a huge portion of their diet in fat, and may be the world leader in terrifying bile production. Polar bears will even kill seals just to eat their fat, leaving everything else, because of the huge amount of fat intake they require. Polar bears, of course, are using all that fat to not freeze to death; females even bigger reserves when pregnant and nursing, because they den up and don't eat during that period.

So as a side effect, they have freaky bile sacks producing really potent bile. Bile, of course, is a detergent that breaks up the fat and makes it water soluble, making it biologically available. If you don't have enough bile for the fat you're eating, the leftover fat will just go out of your body (which is nasty). So there's another modified organ that you don't need but will probably want to support this.
__________________
All about Size Modifier; Unified Hit Location Table
A Wiki for my F2F Group
A neglected GURPS blog
Bruno is offline   Reply With Quote
Old 09-29-2016, 11:30 AM   #40
Anthony
 
Join Date: Feb 2005
Location: Berkeley, CA
Default Re: Semi-realistic Regeneration and corresponding Increased Consumption

Quote:
Originally Posted by vicky_molokh View Post
Oh well, I was hoping for something that is better than fats, but I guess that's not much of an option.
You can do better than fats by having something that's closer to the finished product and thus requires less energy to finish the job. If we've got some form of material that can rejoin damaged tissues more effectively than existing mammalian biochemistry (coagulin et al), your least weight option is probably to store deeper reserves of that material, and package it with just enough surplus energy to power its normal transformation.

Mechanically speaking this would be closer to limited uses than costs fatigue, though limited uses is highly inefficient on hourly regeneration.
__________________
My GURPS site and Blog.
Anthony is offline   Reply With Quote
Reply

Tags
bio-tech, increased consumption, realism, regeneration

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Fnords are Off
[IMG] code is Off
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 11:30 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.