Specialists of the Institute of Comprehensive Social Studies (Modern University for the Humanities) have carried out detailed analysis of changes in the matrimonial relations structure in the world since 1950 to 2000. The researchers considered four types of matrimonial relations: monogamy (one man – one woman) and three types of polygamy - polygyny (one man – several women), polyandry (one woman - several men) and polygyandry (several women – several men). The fifth type of reproductive relations - promiscuity, i.e. lack of permanent conjugal units between sexual partners - was not taken into account.
As for monogamy, it can be complete (men and women have only one partner during the entire life span) and serial when men and women enter new monogamous marriages after divorce. As compared to animals, monogamy is to a larger extent biologically tied up with human beings, this being explained by the necessity of joint upbringing of children for a long period. Nevertheless, only 30 percent of human communities are monogamous.
For analysis, the researchers used information from the International Database of US Census Bureau across 160 countries about which the most complete data was available since 1950 through 2000. The following trends were discovered.
Sergey Komarov | alfa
Lying in a foreign language is easier
19.07.2018 | Julius-Maximilians-Universität Würzburg
05.07.2018 | Institute of Science and Technology Austria
A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.
The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
13.07.2018 | Event News
12.07.2018 | Event News
03.07.2018 | Event News
20.07.2018 | Power and Electrical Engineering
20.07.2018 | Information Technology
20.07.2018 | Materials Sciences