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Older parents are happier with more children

https://www.mpg.de/1196914/older-parents-happier?c=24555877

The more children young parents have, the unhappier they are. From age 40 on, however, it is the other way round. Then, more children generally mean more happiness. This is true independent of sex, income, or partnership status, as researchers of the Max Planck Institute for Demographic Research (MPIDR) in Rostock and the University of Pennsylvania now show in a study based on a survey of over 200,000 women and men in 86 countries conducted from 1981 to 2005.
more children Older parents are happier with more children The satisfaction of

3D-printed pills with desired drug release

https://www.mpg.de/20687249/pills-from-the-3d-printer

Pills could soon be produced in shapes that resemble design objects. And this would not be just an aesthetic gimmick, but would serve to release active medical ingredients in the body in a controlled manner. A group of computer scientists from the Max Planck Institute for Informatics in Saarbrücken and the University of California at Davis have developed a process that uses a combination of computation and 3D printing to produce tablets that dissolve in liquids over a specified period of time. The approach could be of interest to the pharmaceutical industry, which has focused heavily on 3D printing recently.
level can be kept constant by adminstering a high dose first and then continuing with