Moreno

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About Moreno

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  1. Moreno

    The end of gasoline/diesel powered cars?

    Nissan promises to release later this year a new version of the LEAF with claimed range up to 226 miles. https://www.greencarcongress.com/2019/03/20190304-leaf.html I wasn't able to find an exact official specs on the 62 kWh battery, but some sources claim it weights around 300 kg. If this is true, then problem of a normal plug-in hybrid is almost solved. We can cut battery in half (150 kg) and obtain a hybrid with decent range of 113 miles. Maybe some additional not very large set of a high power batteries (similar to Lithium-titanate) will be needed to compensate for the power peaks. I wonder how Nissan was able to achieve that energy density and what kind of materials and rare metals they use. If this type of batteries could be produced at moderate price we are on the verge of plug-in hybrid revolution.
  2. Moreno

    Are we heading for war ?

    Now China produces 1/3 of total manufacturing production in the World. https://knoema.com/atlas/topics/Economy/Short-term-indicators/Industrial-production I think when this number will start to get close to 50%, World start to face a new reality. Total China's population is 1.5 times larger than population of all modern developed countries combined (US, Canada, Australia, Western Europe and Japan). I think somewhere after 2050 China will start to have serious opportunity to extend nearly total economic and political control on depopulating Russia, Ukraine, Central Asia, Mongolia and several other medium or large countries in Asia and throughout the World. So, the New World is looming...
  3. In my understanding majority of modern health disorders (in civilized countries) aren't caused by infections.
  4. I'm thinking about something that could be much less harmful and less expensive than modern prescription drugs.
  5. What could be a future alternatives to the chemical drugs/medication?
  6. Is it higher porosity and smaller size of pores which are responsible for much higher energy density of supercapacitor vs. electrolytic capacitor? Or there is something else? On other hand electrolytic caps are able to withstand much higher working voltages what suppose to contribute to energy density.
  7. Moreno

    An ohmic contact

    Forming gaps between what and what? Can you explain it more in detail? In some monovalent metals (for example Sodium) all valent electrons are located in conduction band. The valence band is completely empty. In order to conduct holes a material needs to have partially filled valence band. How can you inject holes in a material if its valence band is completely empty? Also, if forward bias action of a p-n junction or (possibly) metal-semiconductor ohmic contact is based on constant carrier recombination, how it comes that very little energy is wasted? Doesn't intensive carrier recombination suppose to consume lot of energy and furthermore lead to material overheating? (What suppose to increase resistance in metal at least.)
  8. Moreno

    An ohmic contact

    Principally, similar question can be related to p-n junction. But if in the case of p-n junction there is flow of holes into n-type region (forward bias), how there could be flow of holes into metal in the case of metal-semiconductor ohmic contact? Monovalent metals typically conduct no holes...
  9. Moreno

    An ohmic contact

    Isn't an ohmic contact a variety of a metal-semiconductor junction? In the case when the later doesn't have rectifying properties? My question was: why contact of a higher work function metal and a lower work function P-type semiconductor is an ohmic junction? When we apply potential and make electrons flow from metal to semiconductor in the case above doesn't semiconductor suppose to case resistance to such flow? And also, if electrons start to flow from metal to semiconductor, doesn't they suppose to recombine with holes and make semiconductor depleted for any kind of carriers further increasing the resistance? How P-type semiconductor can conduct free electrons, those which belong to conduction band of the metals?
  10. Moreno

    An ohmic contact

    Sorry, in the my first sentence I've used a generalized expression "Schottky type of contact" for both Schottky junctions and ohmic contacts. Probably, I would have to use "metal-semiconductor junctions" instead.
  11. Moreno

    An ohmic contact

    Yes, read it carefully.
  12. Moreno

    An ohmic contact

    It is claimed that Schottky type of contact between low work function p-type semiconductor and higher work function metal creates an ohmic contact in which current can flow both sides almost fluently with very low resistance. It is also claimed that electrons have tendency to flow (when no potential is applied) from low work function material to higher work function material. So, when low work function p-type semiconductor comes in contact with higher work function metal, a p-type semiconductor will not let electrons from metal enter into semiconductors and will push them back. It seems a bit counterintuitive to me, because how in this case could it be an ohmic contact? Doesn't p-type semiconductor with lower work function suppose to cause resistance when potential is applied to make electrons flow from metal to semiconductor? Furthermore, if electrons penetrate from metal to p-type semiconductor under applied potential, doesn't they suppose to recombine with holes and create a depletion zone poor for any charge carriers and further increase resistance? https://materion.com/-/media/files/advanced-materials-group/me/challenge-of-applying-ohmic-contacts.pdf
  13. Moreno

    Designer babies

    I think that additional genes of altruism, kindness and spirituality would be definitely not a spare for humanity.
  14. Define "patriarchal" or "matriarchal". In traditional terms: patriarchal = higher fertility rates. Matriarchal - higher participation of woman in economy = higher productivity (for the same amount of population). Therefore matriarchal is more successful when high fertility strategy goes into a dead end or when low fertility rates problem is solved.
  15. Moreno

    Infinite qualia

    I'm talking not about shades of colors, but about true colors. Shades exist within some finite spectrum. But humans cannot see ultraviolet, x-rays, gamma rays, for example. If we do then it would add to some principally new colors we never seen before and therefore cannot even imagine. But since EM spectrum is infinite (possibly), then we can potentially perceive an infinite amount of true colors, not only shades between them.