Unkown Blogger Pursues a Deranged Quest for Normalcy

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Archive for the ‘Uncategorized’ Category

Freedom

Posted by ubpdqn on June 2, 2017

This week it…Zihuatanejo is still quite far off…

Squeezing and Folding

Posted by ubpdqn on May 2, 2017

This post is based on the Henon map:
$x_{n+1}=y+1- a x_n^2\\\\ y_{n+1}=b x_n$

Here is are 1000 iterations of a point:

The following animated gif illustrates the “fate” of a disk after 10 iterations:

Ideal Clinics

Posted by ubpdqn on October 13, 2016

A topical TEDMED talk on physician suicide. Nothing more to be said.

Step by Step

Posted by ubpdqn on May 25, 2016

I hope, step by step, both my weight and overall health trends positively.

Footsteps

Posted by ubpdqn on September 20, 2015

I never I thought I would reach this ‘milestone’. I continue to learn a lot from Mathematica Stackexchange and it has also been a refuge and restorative  during a year in which my mother died after a sudden unexpected illness,  I suffered a life threatening illness  myself and I am struggling through some very difficult times.

Depression and suicide has been very topical  and given various faces including famous sporting identities. I hope it portends greater understanding, greater research, effective treatments and in general a more compassionate and peaceful world.

n the spirit of RUOK day and World Suicide Prevention day…may we be open and sensitive to those who suffer in silence and translate slogans into connections, may we venerate those who stand by those sufferers and may we support those who are left behind when the worst comes…peace to all.

Test

Posted by ubpdqn on August 25, 2014

The Seven Daughters of Eve

Posted by ubpdqn on September 16, 2013

I received this book as a gift. I enjoyed it.  The author gives a personal account of his deep and continuous involvement in the development  of methodology to extract, analyse and interpret mitochondrial DNA. We inherit our mitochondrial DNA from our mother.  This tool is applied to understand our genetic ancestry.

The author explains the reliable, stable and reproducible nature of mitochondrial DNA. The collaborative and adversarial/argumentative nature of scientific progress. Mitochondrial DNA analysis stood the intense scrutiny and served as valuable insight. Ultimately, through a journey including exploration of the Last Tsar of Russia, the Pacific Islands, Cheddar Man the author weaves together a complex story of the genetic network/lineage of Europe and forays into the connecting the world.

The majority (95%) modern Europeans have descending from seven clan mothers. Mitochondrial DNA can be used as a molecular clock to determine the age of these ancestors. The author…

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Introduction to Biological Physics

Posted by ubpdqn on August 6, 2013

This book is targeted to Health Sciences. It is clearly written. It covers a broad range of topics. It is committed (nicely) to the use of SI units and has many worked examples. The depth is relatively shallow but it is a good introduction, The book  presents important quantification and simplifies the mathematics to algebra (no explicit calculus) from classical physics.

The authors chapter on MRI was covered in more detail and was well written. One omission in the section on Safety was the interaction with implantable electronic devices: device malfunction, induced currents in orphan leads etc.

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Dynamical Systems with Applications using Mathematica

Posted by ubpdqn on July 22, 2013

This is a very useful book. The emphasis is on understanding concepts using visualization provided by Mathematica.

I found the second half of the book difficult. This reflects my inexperience. However, it was interesting, particularly the discussion and explorations related to neural networks.

The exercises have answers at the end of the book and I look forward to accessing the notebooks referred to in the text. The book precedes version 9 but the code updating seems relatively straightforward.

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Roll of the Dice

Posted by ubpdqn on June 25, 2013

Another puzzle from the NY Times Number Play:

Wouter throws three dice.These dice look just like ordinary dice, but their faces are numbered differently.The first die has the numbers 1, 1, 2, 2, 3 and 3 on it.The second die has the numbers 2, 2, 4, 4, 6 and 6 on it.And the third die has the numbers 1, 1, 3, 3, 5 and 5 on it.He then adds up the numbers he gets from rolling the three dice.What is the probability that the resulting number is odd?

I will have the naive assumption of uniform distribution of outcomes. The second die faces are all even and the third die all odd, hence their sum is always odd. Therefore, the probability the sum of the faces of the three dice is odd=probability die 1 is even =1/3.

Simulation of 10 one thousand throws of the dice are reassuring.

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