∫ntegrabℓε ∂iﬀerentiαℓs · unorganised notes, code, and writings of random topics

Schroeder & Gibson (2007) Disk failures in the real world

May 2, 2018 paper

Hard disk datasheet: MTTF of 1M to 1.5M hours, suggesting nominal failure rate of 0.58 to 0.88%. But annual disk replacement rate observed >1%, usually 2-4% and up to 13% in some system. [more]

Neely (2017) Chinese Foreign Exchange Reserves, Policy Choices and the U.S. Economy

April 20, 2018 paper

Risk of exchange rate fluctuation: Insulated by futures and options contracts available for businesses in developed economies other: government need to manage exchange rate [more]

Ryabko et al (2004) A new test for randomness and its application (JSPI)

April 13, 2018 paper

An article on boosting the power of chi-squared test for checking randomness. [more]

How to fly a horse

Kevin Ashton / 2015

April 9, 2018 book

Book about human creativity. [more]

Python monad code commentary

April 5, 2018 blog code

Wikipedia1 has a reference link to an implementation of monad with Python and its code is at the bottom. Wikipedia article on Monad in functional programming ↩ [more]