Why did Nuruddin ar-Raniri leave Aceh in 1054 A.H.?

Why did Supernova 1054 shine at late times ?

The Crab nebula is the remnant of supernova 1054 (SN 1054). The progenitor of this supernova has, based on nucleosynthesis arguments, been modeled as an 8 − 10 M ⊙ star. Here we point out that the observations of the late light curve of SN 1054, from the historical records, are not compatible with the standard scenario, in which the late time emission is powered by the radioactive decay of smal...

Why did life emerge?

Many mechanisms, functions and structures of life have been unraveled. However, the fundamental driving force that propelled chemical evolution and led to life has remained obscure. The 2 law of thermodynamics, written as an equation of motion, reveals that elemental abiotic matter evolves from the equilibrium via chemical reactions that couple to external energy toward complex biotic nonequili...

Why Customers Leave or Decide Not to Leave – 40

Why did TD-Gammon Work?

Although TD-Gammon is one of the major successes in machine learning, it has not led to similar impressive breakthroughs in temporal difference learning for other applications or even other games. We were able to replicate some of the success of TD-Gammon, developing a competitive evaluation function on a 4000 parameter feed-forward neural network, without using back-propagation, reinforcement ...

Why Did “Zombie” Firms Recover in Japan?

The Japanese economy experienced prolonged recessions during the 1990s. Previous studies suggest that evergreen lending to troubled firms known as “zombie firms” distorted market discipline in terms of stabilizing the Japanese economy and caused significant delays in the economy’s recovery. However, the eventual bankruptcy of zombies was rare. In fact, a majority of the “zombie” firms substanti...