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We might be closer to changing course on climate change than we realized
  • you want proof that accumulated carbon dioxide is causing environmental destruction?! https://www.ipcc.ch/report/ar6/syr/downloads/report/IPCC_AR6_SYR_SPM.pdf

  • We might be closer to changing course on climate change than we realized
  • Tthis is perhaps good news, but it does not amount to a change of course, unfortunately. If we have passed peak emissions, it is still a long way from net-zero emissions. Like if you pass your peak rate of overspending your salary, but you are still continuing to go farther into debt. Even when you get to parity between salary and expenditures, you will STILL have the accumulated debt and in the case of CO2, that debt is wreaking ecosystem destruction. Do not cheer this news.

  • Microplastics found to enter agricultural land through wastewater
  • There is a new process for treating wastewater sludge that destroys the microfibers, so that is good news at least. I think it may be expensive, of course. It is called "hydrothermal carbonization". Basically put the sludge in a giant pressure-cooker and the heat breaks the plastics into carbon and some water-soluble residual molecules which can go back to the start of the wastewater treatment plant to be biodegraded. But like others say, the main source in general is tires - not sure if they know whether tire microplastics are the main source in agricultural land though.

  • Nature Has Value. Could We Literally Invest in It?
  • In economic terms, nature is often referred to as an "externality" - meaning, as you say, things which do not appear on corporate balance sheets - that are unvalued. We have collectively recognized that clean water in rivers is something valuable to society, and converted the externality of "use the river to carry away the pollution!" and "use the river water to cool the process plant" into actual costs: not by making investors put their money into riverine systems for future profit, but by requiring permits which restrict what can go into or come out of the river. We can, and sometimes do, manage the land in similar ways. I advocate for it, but of course I get a little anxious about the details if it comes to MY land!

    I spent a couple of years in Guna Yala, the indigenous-peoples' territory of northeastern Panama. The Guna people live in towns on islands just offshore of the coast, and they farm and hunt in the mainland forest. When a Guna family wants to grow crops, they go with a village chief to the forest area near the village and identify a piece of land that is suitable. The chief approves it and records the location, and the family has it for three years. They can cut trees, plow soil, plant whatever. After three years, they have to abandon it and nobody can use that land for three years.

    I feel very much that my land is not REALLY mine. I have stewardship. The people that had it in the recent past (20th century), did not treat it well and shame on them. But they are dead and gone, so they don't care I guess. I am treating it better and someone later will probably be glad to acquire it because of the great soil, healthy and perhaps valuable tropical hardwoods, and well-connected ecosystem. I'll be dead and gone so I won't care. It is IMMEDIATELY gratifying to live in this place and see it heal and prosper and that is all the return on investment I could ask. But I would at least say they should give me a break on property tax for land I restore to forest (even food forest). Maybe I will donate it to the Nature Conservancy some day, to lock in the gains.

  • No data? No problem! Undisclosed tinkering in Excel behind economics paper
  • From the immortal Journal of Irreproducible Results, "The Data Enrichment Method": ". . .its principal shortcoming is that before the enrichment process can be started, some data must be collected. It is quite true that a great deal is done with very little information, but this should not blind one to the fact that the method still embodies the 'raw-data flaw'. The ultimate objective, complete freedom from the inconvenience and embarrassment of experimental results, still lies unattained before us."

  • Hermit crabs are 'wearing' our plastic rubbish
  • I note that only one of the photos accompanying the article features PLASTIC rubbish. curious

  • More Bad News For Fossil Fuels: Green Hydrogen Is Making Green Steel Happen
  • The article mentions hydrogen from electrolysis of water, but I think a bigger source in the future could be steam reforming of biomass. That is, when you heat biomass (plant matter, sewage sludge, maybe even municipal garbage) to about 300C in steam, the organic matter breaks down into simple molecules like hydrogen, carbon monoxide (highly flammable!), methanol, elemental carbon (biochar) and miscellaneous others. Some of those molecules can be recovered for important chemical feedstock (since we won't have petroleum or natural gas as feedstocks anymore, right?), and the gas can be fuel.

    In the early days of natural gas use, towns would "reform" the methane (CH4) by reacting it with steam to make carbon monoxide (CO) and 3 molecules of H2 - a mixture known as "city gas". It is not new technology.

  • Satellite images show China made an apparent USS Gerald R. Ford aircraft carrier target out in the desert
  • gotta admit, that is a lot safer approach than trying some shit on the real thing

  • The fall of Firefox: Mozilla's once-popular web browser slides into irrelevance
  • The statistic of low Firefox use is based on accessing US government websites. Could it be that there is significantly LESS government site access by the population of users that prefer Firefox? As a corollary I recently read that game companies observed significantly HIGHER bug reporting from Linux users on Steam, not because there were more Linux-related bugs, but simply because that set of users were more likely to initiate bug reports. Of course Firefox is not Linux and Steam is not the world, but a statistic from a relatively narrow segment of the internet should not be assumed representative of the whole.

  • comfortable wooden seats

    I have been investigating the fine art of dishing out a wooden chair seat for comfort today, and made discoveries that can be readily condensed into a, imho miraculously easy formula. So here goes:

    Your "sitz" bones or ischial tuberosities are prominences of the pelvis that are the hard spots when you sit. They are pretty consistently located in adult humans as it turns out, though you'll have a hard time finding dimensional data if you go looking! I measured approximate spacing among a slightly inebriated and jovial crowd who endured the indignity with humor and made a rough prototype seat to check my theory. Drill two 2-inch diameter holes spaced five inches apart at center (3-inches of material remaining between the holes). For a finished seat, one would shape the edges, but don't even bother for this experiment - just drill the holes in a piece of lumber and sit down on it. shift around for comfort and when your ischial tuberosities align with the holes you will say aaah!

    I will be making two holes in a rectangular stool seat at this spacing, centered about three inches from the "back" edge of the stool, and sanding smooth and dishing out the seat a little. I'll try to remember to post a finished picture, but I found this preliminary result too great and dramatic to wait.

    Some individuals might be grateful for a third hole at the centerline and about two inches closer to the back edge - where a tailbone-afflicted person does not need hard support and an average person will not miss it. I have not tested this third hole yet, maybe others will report...

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    Western Philosophy vs Eastern Philosophy
  • 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.

  • Most Americans want to electrify their homes — if they can keep their gas stoves
  • 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).

  • Most Americans want to electrify their homes — if they can keep their gas stoves
  • 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.

  • We're receiving at least 40 cubic yards of wood chips today - AMA
  • 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.

  • Taylor Swift postpones Rio concert after fan dies amid heatwave
  • 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.

  • Hypothetical question - can a swimming pool be safely turned into a walipini/sunken greenhouse?
  • 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.

  • What was it like when cosmic inflation occurred?
  • the ultimate run-away train! No matter how impossibly big it is, it just grew infinitely bigger in the past second.

  • Do gravitational waves exhibit wave-particle duality?
  • 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

  • Does steam ui restart in the background while playing games for anybody else?
  • I have plain ol' Ubuntu LTS and I do not recall a Steam crash in a decade. Playing with Nvidia GPU on AMD Ryzen in recent years.

  • The “Tragedy of the Commons” Is a Dubious Concept
  • What the author is saying, I think, is that the inevitability of the tragedy is the right-wing concept. The concept of the commons is totally legit and the tragedy that can befall it from unregulated use is also clear. The right-wing concept that is dubious is that humans will self-regulate and do not benefit from governance.

  • Made a table

    Table top is four 50-pound bags of ready-mix grout concrete (no stone, just sand), 3m of 1m wide 1x2inch fence mesh.

    Chairs were solid white upholstery. We bought them in a second-hand store and painted with diluted acrylic (to hide old stains). Waiting 30 days before I apply sealer to the concrete.

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    magnetohydrodynamics?

    has anyone here ever experimented with an "electromagnetic" pump? If the pumped liquid is conductive and the piping is enclosed in a coil (think solenoid), and a current is passed across the fluid near the coil, then the magnetic field made by the coil should attract the fluid passing the transverse current (causing it to flow). As fluid flows toward the coil, new fluid starts passing current and so on.

    Electromagnetic pumps are used in metal processing for continuous casting, but those are fancy and expensive devices. Could I pump seawater by wrapping a coil around a garden hose and pop-riveting a couple of electrical contacts into the hose on opposite sides next to the coil? I think regular "fresh" water would not be sufficiently conductive, but whatdoIknow? My longer term plan is to try pumping molten salt, but I want to learn on cooler stuff first.

    I'm all ears!

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    Floating Kelp Forests

    Some years ago, I was doing a little volunteer work with Climate Foundation, and I loved their long-term vision. It was based on these facts: 1) giant kelp is fast-growing brown algae that thrives in cold, nutrient-rich water. It is among the fastest-growing plants in the world 2) kelp thrives when there is abundant sunlight - clear water is much better for kelp than turbid water 3) cold, nutrient-rich seawater is present in oceans worldwide, but in the tropics, for example, it is present only below a depth of about 300 meters 4) kelp needs an anchor-point - it attaches and grows long fronds - it does not grow free-floating.

    So the CF vision was to eventually build large kelp farm support arrays at a depth of 30 meters - suspended from buoys at the surface. Cold water would be drawn up from deeper ocean to create a suitable habitat for the kelp at the surface. But ships could still pass right over the platforms, if they could avoid the support buoys. These floating arrays would have the potential to support a vast new fishery in the tropics where pelagic fish are relative scarce in natural conditions. The fast growing kelp would absorb a large amount of carbon dioxide, and kelp fronds that sink in the deep ocean carry their carbon to the abyss where it is fixed for practical purposes for centuries, at least. Finally, vast kelp forests could support a range of industries; tourism certainly, but also a variety of chemical and food products that can be derived directly from kelp or with some added processing.

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    Atheism @lemmy.ml CadeJohnson @slrpnk.net
    Hard Determinism

    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. <further mumbo-jumbo here>

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    Comment federation

    I subscribed to !news at . . . well it probably does not matter. I receive the news the moderators are posting there, but also every single boosted comment anyone makes on the news stories as separate inane postings on my mastodon feed(!) That can't be the way to run a railroad! Can comment reposting be disabled by moderators or can it be suppressed by users? Because othewise, the news feed subscription is a poison pill to my fediverse-based feed.

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    A Solar dryer

    !

    This has been a gratifying addition to the estate. When the garden works, sometimes it REALLY works. Of course neighbors get some overflow, but their gardens tend to be working too. Nothing would go to waste if we did not harvest, of course, but all kinds of dried stuff is nice to have: tomatoes, herbs, banana slices, mango slices, kale leaves - those are our top uses.

    This is a simple design inspired by inheriting two suitable glass panes. It is a simple box with 1x6 plank sides (to make total "depth" of 11 inches (28cm). The "bottom" is a thin sheet of galvanized steel. Interior is painted flat black and it gets quite warm in there - I should measure some time.

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    Finding and Subscribing to external Lemmy Community

    I used https://browse.feddit.de/ to discover a community of interest and they provided this link to subscribe: !electronics@discuss.tchncs.de but when I paste it in the search field for joining a community, nothing happens, or sometimes there is a "not found" message. A growing pain I suppose. I will keep trying . . .

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    CadeJohnson CadeJohnson @slrpnk.net

    retired engineer, former sailor, off grid, gamer, in Puerto Rico. Moderating a little bit.

    Posts 8
    Comments 44