Journey Four

The Journey of the Four Colour Theorem Through Time

The Four Colour Theorem is one of the simplest mathematical problems to state and understand. It says that any planar map is four-colourable. In other words, given a map, one can colour its regions using at most four colours, such that no two adjacent regions are coloured by the same colour. As simple as this result may seem, it took mathematicians over 100 years to prove, and some may still no...

The 150 Year Journey of the Four Color Theorem

Inheritance of Business Processes: A Journey Visiting Four Notorious Problems

The new millennium is characterized by speed and distribution in every aspect of most business and organization undertaking. Organizations are challenged to bring ideas and concepts to products and services in an ever-increasing pace. Companies distributed by space, time and capabilities come together to deliver products and solutions for which there is any need in the global marketplace. This ...

Transforming a hospital safety and ergonomics program: a four year journey of change.

The conception of "Patient Safety" being the number one priority at Hospitals can reduce the emphasis on overall employee safety and health. This review examines a hospital's need to improve 24/7 active (i.e., not reactive) coverage, regulatory compliance, as well as the frequency and severity of employee injury losses. It also discusses a journey to integrate and improve safety and ergonomics ...

A Four-Year Hospital Journey for a Lost and Migrating Appendicolith

We report a rare case of recurrent abscess formation, including being at a retroperitoneal site, due to a lost and migrating appendicolith. Over a four-year period and following an episode of perforated appendicitis, an otherwise healthy young man underwent two operations for abscess formation with eventual stone removal. Appendicoliths can pose a challenge during the diagnostic and therapeutic...