Evolution of Operating systems from Unix
But the branch of the that readers might find most interesting led to humans. Humans are in the phylum, and the last common ancestor that founded the Chordata phylum is still a mystery and understandably a source of controversy. Was our ancestor a ? A ? Peter Ward made the case, as have others for a long time, that it was the sea squirt, also called a tunicate, which in its larval stage resembles a fish. The nerve cord in most bilaterally symmetric animals runs below the belly, not above it, and a sea squirt that never grew up may have been our direct ancestor. Adult tunicates are also highly adapted to extracting oxygen from water, even too much so, with only about 10% of today’s available oxygen extracted in tunicate respiration. It may mean that tunicates adapted to low oxygen conditions early on. Ward’s respiration hypothesis, which makes the case that adapting to low oxygen conditions was an evolutionary spur for animals, will repeatedly reappear in this essay, as will . Ward’s hypothesis may be proven wrong or will not have the key influence that he attributes to it, but it also has plenty going for it. The idea that fluctuating oxygen levels impacted animal evolution has been gaining support in recent years, particularly in light of recent reconstructions of oxygen levels in the eon of complex life, called and , which have yielded broadly similar results, but their variances mean that much more work needs to be performed before on the can be done, if it ever can be. Ward’s basic hypotheses is that when oxygen levels are high, ecosystems are diverse and life is an easy proposition; when oxygen levels are low, animals adapted to high oxygen levels go extinct and the survivors are adapted to low oxygen with body plan changes, and their adaptations helped them dominate after the extinctions. The has a pretty wide range of potential error, particularly in the early years, and it also tracked atmospheric carbon dioxide levels. The challenges to the validity of a model based on data with such a wide range of error are understandable. But some broad trends are unmistakable, as it is with other models, some of which are generally declining carbon dioxide levels, some huge oxygen spikes, and the generally relationship between oxygen and carbon dioxide levels, which a geochemist would expect. The high carbon dioxide level during the Cambrian, of at least 4,000 PPM (the "RCO2" in the below graphic is a ratio of the calculated CO2 levels to today's levels), is what scientists think made the times so hot. (Permission: Peter Ward, June 2014)
Evolution of Operating Systems Essays - ManyEssayscom
Three cycles are clear in the evolution of computers, the mainframe computers, minicomputers and microcomputers, and each of these stages influenced the development of operating systems....
One major problem with making a positive impact on a global level, ultra-elite machinations aside, is that almost nobody focuses on what is important, which I hope to help remedy with this essay. Almost everybody hacks at branches if they hack at all. Conspiracists tend to obsess on elite machinations, which is an exercise of dubious benefit to begin with, but they often become paranoid and also confuse retail elites or other interests with the GCs. Bill Gates and David Rockefeller are probably not members of the GCs’ organization. Also, I learned that ultra-elites can only play their games with the responsibility that almost all people have abdicated as they play the victim. The GCs are only a symptom of our malaise, not a cause. They cannot be beaten at their game, and it is counterproductive and can even be suicidal to try. Making them obsolete is probably the best that we can do. While conspiracists often fixate on ultra-elite machinations, intellectuals, academics, and scientists tend to deny that such activities even exist or are meaningful. It took me many years to understand their resistance to even acknowledging ultra-elite existence, and I think it partly relates to the mainstream scientific worldview that . They have an ideological aversion to the notion that anybody manipulates events on a global scale, and believe that what seems conspiratorial is only anarchic elites competing with each other, which is like Darwin’s view of evolution. They believe that conspiracists see a pattern where none exists, or that the situation can be explained without invoking conscious intent, like materialistic hypotheses of how the universe operates. Radical leftists have to the of such elites; such an idea scares them. Neither obsession nor denial helps people attain productive understandings of the issue. Conspiracists and structuralists are united in thinking like victims, and that, as I see it, . Until they relinquish thinking like a victim, they will not constructively engage the critical issues that humanity faces, and energy ranks above all else. Victims are reactive instead of proactive, and only and resulting action has a prayer of working, in my opinion.