CadeJohnson

joined 2 years ago
MODERATOR OF
[–] CadeJohnson@slrpnk.net 2 points 2 years ago

sorry nobody has replied - I'm no help for you from here in Puerto Rico. Are you familiar with the site iNaturalist.org? When we're looking for a species that seems to be missing, we use iNaturalist to check for sightings in the region. You can filter by dates.

[–] CadeJohnson@slrpnk.net 1 points 2 years ago

wrong, western philosophy is often based on dichotomies - something is either this or that, but it is more of an analytical tool (I am not nature despite that I am a part of nature). Eastern philosophies are often mystic, though there is western mysticism - that some aspects of existence are incomprehensible on a rational basis and therefore dichotomies are illusory. But such a perspective does not inherently make people better stewards of the environment - in fact they might conclude that their every action is "natural" by definition.

[–] CadeJohnson@slrpnk.net 2 points 2 years ago

In the US, stove burners are rated in the confusing units of "BTUs" which is actually a unit of energy, not power. When they say BTU, they mean BTU/hour. The highest-rated burners on a typical stove are about 10,000 Btu (per hour), but high-end stoves can get up to about 18000 - that is equivalent to about 5000 watts. My single-element induction top is only rated for about 1000 watts. So although it heats and cools rapidly, I suspect it is not up to the demands of wok cooking (unless one wants to cook only very small portions).

[–] CadeJohnson@slrpnk.net 1 points 2 years ago (2 children)

not Chinese, but I cook a lot with a wok. I also have a single induction cooktop and surprisingly, the wok has enough iron to work with it while some old cheap conventional cookware did not. However, wok cooking needs to be hot all over the wok and not just in that little point where the wok is close enough to the induction coil.

I have a conventional propane stove which I need to keep, because here in Puerto Rico the power system is quite unreliable (especially during a bad hurricane year). But the conventional stove burners are not really hot enough. With a 1/16 - inch drill bit I could increase one of the burners capacity substantially. I painted the stove knob red so people have some warning when they light that burner! It burns more gas, but wok cooking is really fast, so in the long run it is probably more efficient than lots of other cooking approaches.

I would definitely consider a wok-shaped induction heater. Induction heating is quite remarkable.

[–] CadeJohnson@slrpnk.net 3 points 2 years ago (1 children)

Have you tried your hand at biochar? I know composting the chips for mulch is high value in a farm operation, but a few tons of biochar can work like a permanent upgrade - improving the soil permanently with one addition - though ongoing permaculture operation continues. I am about to make a biochar cooker out of two steel barrels - inner fuel chamber and outer draft shell. It would probably be more effective with wood scraps than chips though - some air passages through the fuel.

To test it out for myself, I made a miniature version documented at https://github.com/jcadej/TLUD-biochar-reactor (uses a gallon paint can for the fuel chamber. You could test it small and see how it does with wood chips. When I make my bigger version, I will add it to the github project. My rough idea is to cut one barrel down the side and squeeze it smaller and bolt it so it fits inside the other.

[–] CadeJohnson@slrpnk.net 2 points 2 years ago (1 children)

I'd hate to think modern society is based on a giant elaboration of poker, but I can't rule it out - it MIGHT not be the worst outcome, but a pseudo-equilibrium far from the best. Every young person knows something accessible in the past is now lost to them - not sure what it is, but there is a hole. And yet, the social track laid out is almost unavoidable.

I traveled a good bit the past 20 years and I've experienced first-hand the really hard work and the immense gratification of simple farming. Nobody wants to live like that (at least so they think). Having done it, I can't even say I recommend it over what modern society seems to offer. But since the best option on offer is not a true equilibrium, as the climate is making abundantly clear, what is on offer may be illusory. An alternative equilibrium - tried and true - is worth considering when opportunity arises: subsistence farming. It is NOT simple or easy - don't wait until there is no other option.

[–] CadeJohnson@slrpnk.net 5 points 2 years ago (4 children)

I have heard this, and I can imagine it is true, but have you seen any analysis? There must be a large crew traveling and lots of equipment - transportation is a big user of petroleum in general -- for entertainment. Though they say the entertainment is good.

[–] CadeJohnson@slrpnk.net 9 points 2 years ago (1 children)

Swimming pools are normally constructed empty. They were withstanding surrounding soil before they were filled, and concrete strength increases with age (for about 90 days, typically). On the other hand, a sunken structure like a pool that is roofed over, becomes a "confined space". Unlike a typical structure, heavier-than-air gases cannot escape from the pool. Such gases could originate from the drain system or flow from leakage outside the pool area. For examples, leaking propane or various gases from sewer lines in the vicinity. A sunken greenhouse would almost certainly be a building code violation for that reason. If you build it, ventilate it by means both active and passive and do not enter if you can't verify that ventilation is working.

[–] CadeJohnson@slrpnk.net 2 points 2 years ago (1 children)

the ultimate run-away train! No matter how impossibly big it is, it just grew infinitely bigger in the past second.

[–] CadeJohnson@slrpnk.net 0 points 2 years ago

maybe space is the graviton field itself(!), but maybe there is a graviton field (or is it the Higgs field?) and gravitons (and Higgs particles?) are excitations of that field; like other particles are excitations of their various postulated quantum fields

 

I've been interested in physics since I was a kid, and read many books on the topic. The thought experiments of Einstein that led to his theories of relativity were some of the earliest topics I encountered. If you have not read of that, do so . . . I will wait.

So we come to the EPR paradox. The new field of quantum mechanics in the 1920s presented this conundrum - that particles could have entangled properties but that those properties would not become determined until a measurement event, at least according to Bohr. But upon one measurement, both particles states would be determined even if they were separated, and this determination would be instantaneous - faster than light.

The EPR paradox received further attention in the 1950s and led to the Bell's Inequalities - describing the paradox in some detail. Bell proposed solutions to the paradox which are each a bitter pill in their own way. Some have received greater press, but there is nothing yet known to choose among them. Two that are most conspicuous are 1) a multiverse - all the outcomes exist in separate parallel universes, and 2) hard determinism - the paradox arises from quantum mechanics being predictive, but spacetime is complete and only one outcome actually exists - always has and always will.

The more I have thought on these options, the less possibility I can grasp for matters spiritual. The multiverse scenario seems ridiculously uneconomical to my admittedly-Calvinist upbringing, but if all outcomes exist, what judgement can there be for how a person lives (i.e. we live in ALL the ways we can). The hard determinism scenario is crystalline. We do not actually have any free will whatsoever - not even the free will to take advantage of being completely inculpable for our actions.

I think there may be a more mystical way of thinking of hard determinism though - a koan, if you will. We are agents of causality within a complete four-dimensional spacetime. We bring the crystalline structure of the universe into existence by virtue of our own existence in some way.

 

I like birdwatching, but I am not a guru on this topic - only creating this community as a gathering place until the serious folks find it (or start a community elsewhere). I am on the watch for them, and today I found @birds@moresci.sale instead - which looks like a good user-to-follow for anyone here (it is a bot).

3
Euphonia (inaturalist-open-data.s3.amazonaws.com)
 

male (yellowish beneath) and females (greenish beneath) eating berries of a euphorbia colonizing a dead tree. Photo link from iNaturalist.org

Chlorophonia musica ssp. musica Dominican Republic

1
American Kestrel (slrpnk.net)
submitted 2 years ago* (last edited 2 years ago) by CadeJohnson@slrpnk.net to c/birding@slrpnk.net
 

American Kestrel

Falco sparverius

Altamira, Dominican Republic

Oct. 2018

 

birds are the canaries in the coal-mine of life. amirite? My wife takes all our bird pictures and posts them on iNaturalist and eBird, but sometimes I obtain a copy of a nice shot and will post it here. We've been birding since about 1985 - off and on; not that we go to the ends of the Earth just to add a life-lister, but if we're AT the end of the Earth, then we'll look around a little while we're there.

 

I was looking back at reddit posts (while deleting them), and I realized I'd written a book worth of stuff about this topic. I would write it all again, if it is helpful. But for a brief synopsis of "how it works", here is what one does:

Assess power needs - look at your living standard and catalog all the devices you power, and estimate the time they operate - power is measured in watts, and time in hours. Multiply to get watt-hours; then divide by 1000 to get kilowatt hours. Compare with your utility bill.

 

I've been using rainwater for a long time. Back in 2001 we rigged a rain catchment when we were living on a sailboat, and we were hooked. Great tasting water and plenty of it, at least here in the tropics.

We built a house in 2013 with roof runoff collection and a pair of cisterns under the house. A pump at the lower level sent water up to a tank located about 12 meters above the house - so there was always water pressure from that 350 liter reserve. We added a 200L first-flush drum to catch the first debris-laden water draining off the roof.

When we moved in 2021, of course we bought a house with a cistern - but it had no roof drain collection, so we had to retrofit that. The first flush tank is a bit larger now at over 400 liters.

Rainwater from a roof can have bacteria and parasites in it, but during storage, almost everything settles to the bottom of the cistern. One thing that does not is Giardia cysts, so it is wise to filter the water with a one-micron cartridge before drinking. Other household uses are adequately pure after a coarse 50 micron filter at the pump, but the one micron filter is on the cold side at the kitchen sink. The first flush capture and the 50 micron prefiltering are so effective the one micron filter is good for a year or more. Even the 50 micron filter shows no sign of clogging in a year, but when we change it, it LOOKS like it needs changing (very dark brown).

 

I bought the electrical equipment from AltEStore and the panels (not shown!) from a local solar store. 4kW Schneider split-phase inverter (replaced once under warranty), and 60A MPPT. The array is a bit over 2kW. The battery bank is KiloVault lithium wired for 48V; 9.6kWh capacity (about $4800 for all eight units).

 

Welcome to Offgrid, experienced moderators are welcome to step forward. I'm Cade, formerly u/kg4jxt - off grid since 2001, and learning something new every day. Let's share our victories and disasters here. Aspirations and fears are welcome.

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