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sethoflagos

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sethoflagos last won the day on January 20

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About sethoflagos

  • Birthday 10/10/1958

Profile Information

  • Location
    Lagos, Nigeria
  • Interests
    Classical Music, Natural Science, Food Preservation, the Geological Record, Deep Time, Beer and species Rhododendron.
  • College Major/Degree
    Chemical Engineering - UMIST
  • Favorite Area of Science
    Probably inorganic chemistry. Or evolution.
  • Biography
    As far as I remember, I got very drunk in all sorts of different places.
  • Occupation
    Semi-retired

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  1. After 25 years in Nigeria, fufu (go Google) remains a step too far for me. I try it from time to time but come away from the experience understanding that I'm evolved to find a good crusty loaf my carbohydrate of choice. Mrs Seth loves it and total respect to those who can share in that pleasure, but it is a taste I have yet to acquire.
  2. The.ramp slope should be no more than what is needed to get the pellet rolling. Too steep and the pellet will slide rather than roll smoothly. Assuming a true conical profile, the pellet will follow a track bounded by two circular arcs of radius length x 6 / (6 - 4.5) mm and length x 4.5 / (6 - 4.5) mm. You might consider embedding photo detectors.in the ramp just outside these bounds to detect out of tolerance pellets coupled to a deflector arm or similar to dispose of them.
  3. Evolution in cat size tends to be governed by niche partitioning: cat species don't thrive when in direct competition with other carnivores of similar size. In much of southern Amazonia there are six 'common' cat species. In size order: jaguar, puma, ocelot, jaguarundi, margay and oncilla. They each avoid direct competition by feeding on different prey appropriate to their size. However, the jaguarundi and similar sized margay avoid competition by one being diurnal, the other nocturnal. If they'd diverged in size instead, they'd encroach on niches already occupied by ocelot and oncilla. So the whole cat guild can be viewed as coevolving in such a way so as not to step on each other's toes.
  4. Why do you omit the cases of large cats getting smaller or small cats getting larger, both of which are supported by the fossil record?
  5. The Na:K mass ratio order of magnitude appears to be established by the ~11:1 ratio in the Earth's mantle. This probably manifests predominantly as hydrothermal vents entering the oceans at mid-oceanic ridges. Beyond that it gets complicated as the elements take different routes in their respective cycles. However, a huge amount of ancient marine potassium has become preferentially locked up in the granites of the Earth's continental crust which must account for some significant depletion of the residual potassium in the ocean relative to sodium. It isn't the complete picture but it may be a good part of it.
  6. I'll stand to be corrected but my understanding is that apples cannot self-pollinate. Cultivated apple trees are cloned varieties grafted onto an appropriate root stock. All fruit on a tree is true to the grafted cultivar, but the seeds will not sprout true to type - you'll get all sorts coming up, even from a single fruit.
  7. So you dispute the law of conservation of quantum information, which is a consequence of the no-hiding theorem. This is in turn considered rigorously proven by many authorities. Your argument by common sense seems to fall a little short in comparison. Google is your friend. The wiki page for 'no hiding theorem' addresses most of your misunderstandings. Even the black hole stuff.
  8. I'm guessing you are referring to the apparent 'furrow' running roughly E-W from the SE end of Cuba to the coast of Belize. Compare with a tectonic map of the Caribbean area The feature clearly aligns with the northern boundary of the Caribbean plate, comprising two E-W transform faults flanking a small N-S trending rift zone. Yes, it looks like a furrow. But it's tectonic, not extraterrestrial in origin.
  9. It's focused somewhere but with a very shallow depth of field. So most of the image is oof The focal plane doesn't appear all that planar. Is it taken through an astigmatic lens?
  10. ... or cylindrical (commonest in my line of work) or even spherical from time to time. False premise (see above) and no. If coordinate axes are not mutually perpendicular, how do you even separate the vectors into independent axial components? Difficult for verbal perception too if you're going to use made up words. Then what use is it? Where are the triangles in a torus? Fluid? Navier-Stokes is a continuum model, not a particle model. This is a rather fundamental distinction and renders the rest of your post somewhat off-topic as far as solving Navier-Stokes is concerned.
  11. Dawkins has used hypothetical cases such as this as a reductio ad absurdum criticism of the Linnaean classification system. In particular, that intermediate evolutionary forms must be shoehorned into either a parent or daughter species at some arbitrary single point mutation event. The reality is of course, that genetic isolation etc allow the transition to occur over many generations of intermediates. The OP is simply an attention seeking gross misrepresentation of Dawkins' argument.
  12. I responded to your question about the funding of palaeontological studies in good faith only to discover that your OP was more of a vehicle to peddle conservative fiscal propaganda. Or at least take its dogmatic assumptions at face value. Okay then: In general, private commercial enterprise requires a supply of well-educated young recruits (including palaeontologists and rocket scientists) but is too short-sighted and avaricious to fund public education themselves. Relying on the population to fund their own individual education creates fundamentally unstable, self-perpetuating tiered societies where the majority are denied access to good education and the better-paid jobs that follow on from that due to lack of means. Most of the more successful economies fund universal education programmes through progressive taxation policies leveraging preferentially on commercial profits and the wealthier sections of society to maximise the opportunities for all to realise their full potential. This latter option carries the additional benefit that a better-educated majority is more likely to appreciate the fairness and political stability of such a system, and less likely to indulge in armed insurrection for example. Of course, there are those who prefer the privileges they gain from less fair systems of wealth distribution. Funding for palaeontological studies for example is under constant pressure from religious fundamentalists for example as its findings tend to belie their underlying mythologies.
  13. A good dinosaur fossil can be a very valuable commercial property. Plus palaeostratigraphy (the dating of rock samples by eg their fossil assemblage) is big business in mineral extraction etc. Maybe it's graptolites and conodonts rather than dinosaurs in that case, but the economy still needs a good reserve of trained paleontologists to identify them.
  14. That's actually quite mindblowing. Thanks!
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