introduction/main.tex: Add a lead-in paragraph

Instead of jumping in at the top, Prof. Cruz suggested zooming out
from my work to the big picture before drilling back down.  Adding
more context can't hurt ;).

diff --git a/src/introduction/main.tex b/src/introduction/main.tex
index 5c06ee9377c0c9361c9aad5adc6e86661b68219e..51b29e18784cd3673485c2f36c044ab2991b722d 100644 (file)
--- a/src/introduction/main.tex
+++ b/src/introduction/main.tex
@@ -1,6 +1,20 @@
 \chapter{Introduction}
 \label{sec:intro}
 
+Single molecule force spectroscopy (SMFS) is the study of folding and
+unfolding transitions in proteins under tension.  By measuring these
+transitions, we hope to gain insight into fundamental protein
+behavior.  SMFS is an attempt to bridge the gap between chemists
+studying folding and unfolding kinetics in bulk solutions and
+theorists simulating protein behavior at the amino-acid level.  An
+increased understanding of protein folding would guide researchers in
+developing drugs targeting biologically significant receptors and
+enzymes.  In this chapter, I describe the protein folding problem in a
+general sense (\cref{sec:folding-problem}), discuss theoretical
+frameworks for understanding protein folding
+(\cref{sec:energy-landscape}), and highlight the role of SMFS in
+extending this understanding (\cref{sec:single-molecule}).
+
 \section{The Protein Folding Problem}
 \label{sec:folding-problem}