• Jul, 2021
  • 02-07-2021

  • People know, or at least reveal info about, their friends and family more accurately than about themselves, researchers say.

     
  • Jul, 2021
  • 01-07-2021
  • New material lattice

    ... which looks similar to a 3d honeycomb, and whose cells have 14 sides each, 3d printed from flexible polymer, then heated until only pure carbon remained.

    They shot sand-like particles at the lattice (similar to what space debris does). At low speeds it bounced off. At high speeds it gouged out craters, crushing the lattice, and remained lodged in the material (didn't pierce the material).



     
  • 'Time neurons' that help brain know when something happened (episodic memory)

    "The activity of the population of hippocampal cells allowed for decoding one temporal epoch from another."


    Human hippocampal neurons track moments in a sequence of events - Leila Reddy et al. at the French national research agency CNRS in Toulouse
     
  • 3d printing tiny lattices water climbs up

    The lattice cells are only 1mm wide.

    New printers are allowing for tiny cells to be printed which, similar to the way trees use capillary action and surface tension to draw water upwards from roots to leaves (which was the model copied here), overcome a problem we have when we try to use liquids (and gasses), which is that we have only been able to use a small part of their mass as their exposed surfaces (like the surface of a container of water). If we can arrange the liquid to have more surface, we can increase its ability to perform things like cooling and exchanging gasses.

    The lattices not only increase the amount of water we can have facing outward. They also bypass the downward pull of gravity (and in the future we'll be able to control the path the liquid takes along a lattice design).


     
  • May, 2021
  • 01-05-2021
  • Convicts in private prisons serve 90 days longer than public prisons

    This is about 5% longer.

    In private prisons, the company's contract has it that they are payed a per diem for each occupied bed.

    "The delayed release erodes half of the cost savings offered by private contracting and is linked to the greater likelihood of conduct violations in private prisons. The additional days served do not lead to apparent changes in inmate recidivism," according to the author.*

    Mukherjee, Anita. "Impacts of Private Prison Contracting on Inmate Time Served and Recidivism."

     
  • How much is a dollar difference?

    A lot more than a dollar, according to research that concluded that Americans pay an average $33 more on auto loans, after analyzing a data set of 35m such loans.

    People perceive the difference between prices that end in 9 and one number higher that ends in 0 as being more different that just one dollar. This is especially true with numbers ending in 99 and 00.

    *An Empirical Bargaining Model with Left-Digit Bias: A Study on Auto Loan Monthly Payments. Zhenling Jiang

  • Conversations don't end when we want them to

    In fact, on average they last twice as long as desired, according to some new research at Harvard, which concluded that the reason for this is a 'coordination problem': conversants have no idea when their partner wants to end and think their partner wants to keep going.

    The reason for this 'unsolvable' problem is that conversants require information they usually keep from each other to know when to end a discussion.

    We usually end conversations through highly routine practices, they noted, such as re-stating the reason they started the conversation ("Well, I just wanted to see you you were doing") or making arrangements ("So let's sort out what time on Monday").

    *Do conversations end when people want them to? Adam M. Mastroianni et al.

  • Wasp benefits

    UC London and U East Anglia researchers studying wasps ave found that while people generally hate them, that hate is in large part due to ignorance about the benefits they bring.

    Their recent study points out that wasps are effective pest controllers. There are 33,000 wasp species. Some are specialized in which aphids, caterpillars or other insects they hunt as food, and can be used as pest control for crops that have to deal with those specific insects. Other wasps hunt insects more generally and can be used for multi-crop farms.

    They're also important pollinators, and some plant species are completely dependent on wasps for reproduction.

    There is also some evidence, although not much as yet, about various values of wasps for making medicine and as a food source.

    *Ryan E. Brock, Alessandro Cini, Seirian Sumner. Ecosystem services provided by aculeate wasps.

     

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