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Six degrees of separation

Six degrees of separation
Six degrees of separation. Early conceptions[edit] Shrinking world[edit] Theories on optimal design of cities, city traffic flows, neighborhoods and demographics were in vogue after World War I. These[citation needed] conjectures were expanded in 1929 by Hungarian author Frigyes Karinthy, who published a volume of short stories titled Everything is Different. One of these pieces was titled "Chains," or "Chain-Links." As a result of this hypothesis, Karinthy's characters believed that any two individuals could be connected through at most five acquaintances. A fascinating game grew out of this discussion. This idea both directly and indirectly influenced a great deal of early thought on social networks. Small world[edit] Milgram continued Gurevich's experiments in acquaintanceship networks at Harvard University in Cambridge, Massachusetts, U.S. Milgram's article made famous[7] his 1967 set of experiments to investigate de Sola Pool and Kochen's "small world problem." Research[edit] John L.

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100 Very Cool Facts About The Human Body The Brain The human brain is the most complex and least understood part of the human anatomy. There may be a lot we don’t know, but here are a few interesting facts that we’ve got covered. Nerve impulses to and from the brain travel as fast as 170 miles per hour. Ever wonder how you can react so fast to things around you or why that stubbed toe hurts right away? Molecular Geometry Molecular Geometry At this point we are ready to explore the three dimensional structure of simple molecular (covalent) compounds and polyatomic ions. We will use a model called the Valence Shell Electron-Pair Repulsion (VSEPR) model that is based on the repulsive behavior of electron-pairs. This model is fairly powerful in its predictive capacity. Grand tree of life study shows a clock-like trend in new species emergence and diversity Temple University researchers have assembled the largest and most accurate tree of life calibrated to time, and surprisingly, it reveals that life has been expanding at a constant rate. "The constant rate of diversification that we have found indicates that the ecological niches of life are not being filled up and saturated," said Temple professor S. Blair Hedges, a member of the research team's study, published in the early online edition of the journal Molecular Biology and Evolution. "This is contrary to the popular alternative model which predicts a slowing down of diversification as niches fill up with species." The tree of life compiled by the Temple team is depicted in a new way --- a cosmologically-inspired galaxy of life view --- and contains more than 50,000 species in a tapestry spiraling out from the origin of life.

Reductionism Descartes held that non-human animals could be reductively explained as automata — De homine, 1662. Reductionism strongly reflects a certain perspective on causality. In a reductionist framework, the phenomena that can be explained completely in terms of relations between other more fundamental phenomena, are called epiphenomena. Revolutions of 1848 The Revolutions of 1848, known in some countries as the Spring of Nations, Springtime of the Peoples[3] or the Year of Revolution, were a series of political upheavals throughout Europe in 1848. It remains the most widespread revolutionary wave in European history, but reactionary forces had regained control, and the revolutions collapsed typically within a year. The revolutions were essentially bourgeois-democratic in nature with the aim of removing the old feudal structures and the creation of independent national states. The revolutionary wave began in France in February, and immediately spread to most of Europe and parts of Latin America.

How the Downs-Thomson Paradox will ruin your commute "There are two basic choices for transportation, public transit systems and private cars. If both methods get too slow, it's generally easier to build an extra road, or make a regular road into a freeway, than set up an entirely new system of public transportation. Unfortunately, that extra road can make the car commute so very much faster than public transportation that people leave subways and pile into cars." If only I could have cited this paradox about 14 years ago when Tim Eyman was gutting public transit in my state. I visited the Bay Area about 8 years ago, after being absent from California for nearly 20 years and what I noticed was how huge built up the highway system was in comparison to what I remember as a kid of 10 in 1974. And during rush hour?

Predicting Reactions There are five different types of reactions possible in the reactions section in the AP Test: 1. Double Replacement Reactions (Metathesis) 2. Redox (Oxidation - Reduction) Reactions Can we get all the nature we need in digital form? – Sue Thomas There are fish in my phone. Some are pure orange with white fins; others have black mottled markings along their orange backs. They glide, twist and turn above a bed of flat pale sand fringed by rocks and the bright green leaves of something that looks like watercress. Sometimes they swim out of view, leaving me to gaze at the empty scene in the knowledge that they will soon reappear. When I gently press my finger against the screen, the water ripples and the fish swim away. Eventually, they cruise out from behind the Google widget, appear from underneath the Facebook icon, or sneak around the corner of Contacts.

Dualism (philosophy of mind) René Descartes's illustration of dualism. Inputs are passed on by the sensory organs to the epiphysis in the brain and from there to the immaterial spirit. In philosophy of mind, dualism is the position that mental phenomena are, in some respects, non-physical,[1] or that the mind and body are not identical.[2] Thus, it encompasses a set of views about the relationship between mind and matter, and is contrasted with other positions, such as physicalism, in the mind–body problem.[1][2] Ontological dualism makes dual commitments about the nature of existence as it relates to mind and matter, and can be divided into three different types: Substance dualism asserts that mind and matter are fundamentally distinct kinds of substances.[1]Property dualism suggests that the ontological distinction lies in the differences between properties of mind and matter (as in emergentism).[1]Predicate dualism claims the irreducibility of mental predicates to physical predicates.[1]

French Revolution of 1848 Louis-Philippe I, the last King of the French Louis Blanc, one of the two workers' representatives in the Assembly of the Second Republic The 1848 Revolution in France, sometimes known as the February Revolution (révolution de Février), was one of a wave of revolutions in 1848 in Europe. Unification of Science and Spirit: Chapter 6 - MIND AS A COMPLEX SYSETM Chapter 6 Among my many memories of early childhood, a few stand out with particular vigor. First and foremost, there is Neil Armstrong walking on the moon -- this was around the time of my second birthday, but I remember it as well as anything I've watched on TV since.