• 9 Posts
  • 246 Comments
Joined 1 year ago
Cake day: June 15th, 2023
  • sj_zero@lotide.fbxl.nettoSelfhosted@lemmy.world•Electricians of fediverse, should I have my selfhosting box grounded?
    2·
    6 days ago

    The most important risk you face is if somehow mains voltage ends up contacting somewhere you get electrocuted and die.

    There are 2 purposes of an earth ground: First it can be used as a reference for certain signals, such as microphones. Second, it can be used to protect against turning yourself into a sparker.

    There is a clear separation between mains voltage and system voltages so it’s typically not going to be a problem, but if a little wire ends up contacting the power supply case it can become energized and things start to get really bad.

    Most of the electrical code where I live focuses on grounding as “Bonding”, which is purely safety related for giving dangerous voltages a safe place to go.

  • sj_zero@lotide.fbxl.nettoScience@mander.xyz•Mothers’ care is central factor in animal, human longevity. In species where offspring survival depends on the longer-term presence of the mother, the species tends to evolve longer lives and a slower
    1·
    10 days ago

    It seems to me that the studying is focusing on the extent to which the life of mothers affects the life of children, particularly looking at multiple stages of life including menopause whereupon the mothers of mothers can directly contribute. It isn’t really about K vs. R, but rather understanding that primate mammals are already type K (investing more heavily in fewer offspring) what the effects of self-preservation on the mother are.

    Regarding the comment on “weird conservative ‘women are for breeding’ undertones”

    That seems like a strangely anthropocentric viewpoint. For most primates other than humans, breeding and childrearing are dominated by the females because the successful strategy for males is often to try to impregnate as many females as possible, and the successful strategy for females is often to try to have sex with as many males as possible to help reduce the chances of infanticide.

    It was with the homo sapiens larger brain and the greater negative effect on females that cooperative reproduction strategies became particularly important.

  • sj_zero@lotide.fbxl.nettoScience@mander.xyz•Mothers’ care is central factor in animal, human longevity. In species where offspring survival depends on the longer-term presence of the mother, the species tends to evolve longer lives and a slower
    1·
    10 days ago

    I think this speaks to a specific thing that can be transferred to human beings. We often focus on the sacrifice for children which is true and real, but the study shows that parents need to take care of themselves because having your parents alive has an impact on you beyond your weaning stage. I think that even though this study is about primates, that’s a truth that also applies to humans.

    The article looks at females because it’s using datasets from primates, but I also believe this would apply to some degree to both parents in human populations. There is data supporting the fact that the 2-parent household is more ideal than a single parent household (and a household with no surviving parents would be worse than that, even after the weaning period is over for a variety of reasons)

    Primate societies would likely help tribemates who are not direct kin the same as humans do, but both primate societies and human societies see people helping others less than their direct kin. There’s studies showing that stepparents are not the same as parents statistically in this regard.

  • sj_zero@lotide.fbxl.nettoScience@mander.xyz•Mothers’ care is central factor in animal, human longevity. In species where offspring survival depends on the longer-term presence of the mother, the species tends to evolve longer lives and a slower
    2·
    10 days ago

    I don’t think that would be useful in the context of what the study was trying to understand, which is the effect of female survival on children of that female.

    The question was about the biological mother, which can be tracked because the mother gives birth. If the biological mother dies but another female continues to behave in such a way to nurture the child, then that is relevant to the analysis only insofar as the primate society took care of the child anyway which would reduce the impact of losing the mother.

    With respect to the father potentially taking on a maternal role, I don’t think the structure of many primate societies is conducive to such research, because primates are typically not monogamous. As a result, neither the researchers nor the primate fathers know who is the father of which baby, and so if a female presenting male were to “take a baby under its wing” after the death of a mother, I would expect that to be similar to a female presenting male who is not the father of the baby and so fit under the data set of death of a mother and just have the effect of flattening out the effects of the measurement.