Science and engineering have dominated world events and world culture for at least
150 years. The blind and near blind have been made to see. The deaf and near deaf have
been made to hear. The ill have been made well. The weak have been made strong.
Radio, television and the internet have made the world seem smaller. And some of us
have left the planet. Computers have played an essential role in all of these
developments; they are now ubiquitous. These miraculous events happened by design—
not by accident. Individuals and teams set out to accomplish goals.
The International System of Units (SI) will be used throughout this book. Four basic quantities
and their SI units are listed in Table 1-1. The other three basic quantities and corresponding SI units,
not shown in the table, are temperature in degrees kelvin (K), amount of substance in moles (mol), and
luminous intensity in candelas (cd).
(BQ) Part 1 book "Evidence-Based dermatology" presents the following contents: The concept of evidence-based dermatology, the critical appraisal toolbox, the evidence (common inflammatory skin diseases, skin cancer, moles, and actinic keratoses).