Keith Wallace is the informal name of a relatively lengthy, wide, double-sided pullout along Lake Crescent, in the Olympic National Park. There is a small rocky beach, with the stumps of old dock-pilings. In times past there were structures on the upland side.
Obstruction Point Road, Hurricane Ridge, Olympic Nat’l Park ridge-top primitive drive in alpine beauty
Obstruction Point Road follows a 12 mile route along the crest of a main ridge on the north front-range of the Olympic Mountains. It starts from near the north end of the Hurricane Ridge Lodge parking, and ends at the Obstruction Point Trailhead, on Obstruction Point.
Atlantis
https://en.wikipedia.org/wiki/Atlantis
https://en.wikipedia.org/wiki/File:Atlantis_map_1882_crop.jpg
https://commons.wikimedia.org/wiki/File:Atlantis_map_1882.jpg
https://en.wikipedia.org/wiki/Ignatius_L._Donnelly
Gordon Stein has noted that “most of what Donnelly said was highly questionable or downright wrong.”[11] [Like Lemuria?!]
https://en.wikipedia.org/wiki/File:Map_of_Atlantis.jpg
https://en.wikipedia.org/wiki/William_Scott-Elliott
Phillip Sclater
scientist, Lemuria theory
Mineralized stream, West Lake Mills Trail, Olympic Nat’l Park
Mineralized stream, West Lake Mills Trail follows the former shoreline of the former Lake Mills, now drained as part of the Elwha River Restoration Project. Well out along this 2 mile trail is a small stream, in which everything the water flows over and splashes on, is heavily encrusted with lime.
Mineralized stream, Michael’s Cabin, Elwha River, Olympic Nat’l Park
Michael’s Cabin is a preserved historic log cabin about 1.8 mi from the beginning of the Elwha River Trail, a major trail in Olympic National Park. Near this cabin a small brook crosses the trail, and everything the water touches or splashes on is coated with (what looks like) lime.
Cloud Chamber an old apparatus with Climate-connections
Cloud Chamber tricks became a big deal during the scientific exploration of radioactivity, and atom-smashers. A clear chamber (glass jar) that is filled with super-saturated gas (can be just water-vapor; alcohol and others work better) displays a miniature condensation-trail when a subatomic particle passes through it. (The ‘tricks’ lie in creating the super-saturated condition.) A magnetic field causes charged particles to follow variously curved or spiraling paths; knowing the strength of the magnet, assorted facts about the particle can be determined, from the shape & length of its condensation-trail path.
Simple forms of the device are readily buildable. More sophisticated, worthwhile enhancements are available to meaningfully upgrade low-end versions, while remaining practical. Dry-ice for example, permits a cold-end that is mechanically simple, very cold, clean, tidy and water-free … and the stuff is made commercially. Build-articles and projects were once a low-intensity mass-craze in the DIY, amateur recreational-science field.
For studying radiation, you don’t want a cloud to ‘actually’ form in the chamber, because then you can’t see the condensation-trail. The chamber needs to stay clear, for trails.
Thus you can tell that before it was found that these things can be used to investigate – amazing and Much More Glamorous – nuclear physics, they were used to study, um, clouds. In a bottle.
You don’t now often run into anything about clouds, in relation to the cloud chamber, and there’s something to think about there.
Clouds & water vapor in the atmosphere contribute something like 60% of the overall Greenhouse Effect. Carbon Dioxide weighs in with maybe 6%. When you run into a statement that CO2 contributes ‘up to’ some pretty-high share, that’s over the Sahara Desert on an especially-dry day, or over the South Pole staring at the edge of the Expanding Universe.
Unfortunately for Climate Science, both clouds and insensible H2O vapor are notoriously uncooperative elements of the natural atmosphere. ‘Difficult to Model’ is realistically a euphemism for ‘we can’t’. You’ll know we’ve made our first baby-steps on this problem, when reliable weather-forecasts go out 10 days.
So taking the Cloud Chamber back to its roots as a device for studying clouds is something to consider.
Chambers for studying sub-atomic particles went big, and bigger. A possible good angle is to go little – on a microscope slide with cover-slip, and watch under the microscope.
Bicycle Electric Motors – Brushless vs. Brushed
Firstly], it should be understood that a conflict between brushed & brushless electric motor technologies had been a long-standing old trope, before the modern electric bicycle arrived on the scene. This is an old argument.
Thus, the argument (or trope) actually came into being in the relative primeval mists of electrical-technology evolution. It’s a bit like the argument whether gasoline or diesel engines are better … 20 or 40 or 80 and more years ago, the facts & particulars in play were different. The hot quiz-tip here is (as in many other technology contexts) that each type of motor has its advantages & disadvantages, strengths & weaknesses, limitations & potential. Utility brushed motors are handier, for example, if you are going to drive a homemade electric bicycle through the normal chain-gears, which is an inexpensive route. Hub-motors are obviously made to be integrated into the hub, and it’s going to be a big hassle to use them any other way. By using sprockets & chain, you can have lots of gears, which give optimum performance under a wide range of conditions, and can do it with a lower-power motor.
Brushes for electric motor commutation are today often posed as a reliability problem. Long ago, brushes wore out fast, and if not caught in time, the steel brush-holder could damage the commutator segments (which in practical terms means a motor-replacement). These problems were largely resolved, by your great-Grandpa. Today, ‘what it is’, is that brushed motors are the (much) less costly solution, and therefore market-forces sometimes create a ‘race to the bottom’, in which some specific manufactured units might be junk. But this does not appear to be a problem with bike-motors, and in particular does not appear to be a big hazard with motors intended or selected for bicycle service.
Brushes are replaceable. Because of computerized inventory & cross-referencing, virtually any brush on any motor anywhere in the world can be identified and replacements obtained, inexpensively. Now, if brush-failure has been extensive, and ignored for a long time (there is arcing, sparking & electrical burning-odors that make it obvious there is a problem), then yeah there is the possibility of commutator-damage which is not worth fixing on ordinary small motors.
Younger folks today may not know that in times not far past, electric motor repair shops where the norm in every 3-horse town in the nation. They are still common in larger population centers. The main reason these shops thrive, is that electric motors are fundamentally unchallenging technology, and everything about them can be addressed with modest investment, tooling & education. They are physically simple & manageable … FAR simpler & easier, than even a lawn-mower engine, much less car-engines.
Brushes at one time tended to wear out fast, because they were formulated to be soft and lubricating, even at the cost of reduced conductivity and increased resistance-loses. But the reason for this type of brush was mainly to spare wear of the critical copper commutater segments. Today, commutator bars are made of improved copper alloys which both improved wear-resistance and gives them better lubricating properties. Thus, brushes in turn can be made with better wear-characteristics, and do not need the lubricity that interfered with their electrical performance.
Brushes tend to wear excessively, under overload conditions. DC motors especially are
Soybean Taboo if you grow food, or minimize nonsense...
Soybean Taboo was noticeable to average people in the American sphere, no later than the early 1970s. (This will likely prove to be the case in Europe, too.) Especially the processed protein component (aka TVP Textured Vegetable Protein) that becomes available (and even a disposal problem) following grinding for the more-valuable oil-component (and its attendant solvent-extraction). Notice that, irrationally, the oil itself, which is the object of the processing (and main value in the bean), generates less concern than the protein, which is a by-product and only incidentally involved.
Soybean is the best source of complete, balanced amino-acid protein in the plant-world. By far. Animal-nutrition science tells us that soy is not desirable as a staple food-base; you should not try to ‘live on it’, alone. Like other beans, there is a limit to how much of it a critter is going to be interested in eating. But well within the optimum range, soy is a dramatic protein-supplement, within a primarily plant-based (and thus, protein-challenged) diet. Soy grows readily in the home garden. So there is real value, at the personal level, in understanding the taboo.
The demonization of soybean is seen in the 1973 dystopian science-fiction movie, Soylent Green, which was based on a book written in 1966. The bean itself was essential innocent in the story … the soybean-lentil food-product (Soylent) was secretly fortified (by the evil government) with ground-up human bodies, and it was this source of added-supplement that consumers supposed found irresistibly, insanely delicious. Indeed, any added animal-fat & protein supplementation of a purely plant-based feed-ration will improve its palatability (and nutritional value) … both for livestock and for humans too.
Soy contains a substance known to chemists as an isoflavone, which bear a degree of chemical resemblance to the hormone estrogen. That isoflavones ever produce any estrogen-effect in animals lacks good or credible scientific support (and it would big-time ‘Big Pharma’ valuable & exploitable, if it did). Nonetheless, we now have the synonym term Phytoestrogen, specially emphasizing a ‘useful implication’ that these substances have hormone-activity. (Thus supposedly, eg, forcing female children into early puberty, and promoting undesirable changes in both younger & older males.)
More-generally, in-general, humans & other animals cannot readily obtain homone-activity by eating a hormone, because hormones are proteins, and as such they are simply digested along with any other protein that is ingested. All that one gets from eating hormone-molecules, is the generic amino acids. Animals – and humans – do not directly utilize proteins that are in their diet, but instead must break them down into amino acids, absorb those, and then build new proteins internally, from the amino acids. Still, the movement to identify isoflavones as dangerous (and their presence in food products as unhealthful at best, and nefarious or diabolical at worst) appears to be experiencing positive growth.
Cooking coagulates proteins (and makes them more-digestible). Proteins that have been denatured in this way or in other ways, no longer have the properties that they possessed in the active, unmodified form. Hormone-molecules that have been coagulated or otherwise denatured, no longer have any potential to play a hormone-role. They’re cooked.
Premarine, or PREMARINE, is the usual pharmaceutical supply of estrogen for humans. The word Premarine derives from the source, which is Pregnant Mare Urine. The context & conditions under which the raw material is obtained is distinctly unattractive at best, and by some standards, more or less ethically objectionable. If we could get a useable estrogen-supplement starting-base from soybeans or other plants, it would be a good thing, and a whole lot less hassle & expense than getting it from horse-pee. Hmm?
Oil is extracted from ground soybeans, using the hydrocarbon solvent hexane, which is a main component of the hydrocarbon-mixture known as gasoline. Hexane was chosen for this process, in part because it is easy to remove, after it has served its role as a solvent in the recovery of the soybean oil. Standards and testing for removal of the hexane are high. Hexane, along with other hydrocarbons, is found in many natural foods, such as citrus and other fruits, filbert nuts, various mushrooms, etc. Solvent-abuse (huffing gasoline) delivers very large doses, yet acute toxicity of hexane is not easily identified. Long-term solvent huffing & sniffing results in damage to the patient, but it is not clear what the role of hexane is here, if any.
Solvent-extraction is very widespread & fundmental technology, throughout the food industry, using hexane either alone or more commonly in conjunction with other solvents. The whole, unprocessed bean has not been subjected to any solvent process, and is completely free of any associated concerns.
Scientific Naming Follies
Scientific Naming Follies is one of an ecosystem of systemic social & psychological diseases of the institution of science, and its associated individual temperaments.
Lumpers vs Spltters is the old term for a high-profile struggle that marred earlier stages of Science. Some workers thought variations on a theme of animal or plant species (and other classes of objects of curiosity) should be lumped-together under a common name. Other workers disagreed, feeling that it was better to divide (split) natural groupings into larger numbers of species … as long as some distinction can be discerned … irregardless at times of the fundamental or superficial nature of apparent differences.