diff --git a/old_thesis/component_failure_modes_definition/component_failure_modes_definition.tex b/old_thesis/component_failure_modes_definition/component_failure_modes_definition.tex
index 08d6908..0e6245c 100644
--- a/old_thesis/component_failure_modes_definition/component_failure_modes_definition.tex
+++ b/old_thesis/component_failure_modes_definition/component_failure_modes_definition.tex
@@ -82,10 +82,10 @@ a vendors' reference number.
 
 Geffory Hall, writing in Spacecraft systems engineering\cite{scse}[p.619]
 defines a `part' thus
-``{\em {Part(definition)}---The lowest level of assembly, beyond which further diss-assembly irrevocably destroys the item''
+``{{Part(definition)}---The lowest level of assembly, beyond which further disassembly irrevocably destroys the item''
 The term component, in American English, can mean a building block or a part.
 In British-English a component generally is given to mean the definition for part above.
-For this study, we will use base-component to mean a `part', and component
+For this study, we will use {\bc} to mean a `part', and component
 to mean a part or sub-assembly. 
 
 What components all have in common is that they can fail, and fail in
@@ -893,7 +893,7 @@ are added to  UML diagram in figure \ref{fig:cfg} and represented in figure \ref
 
 \begin{figure}[h]
  \centering
- \includegraphics[width=400pt,keepaspectratio=true]{./master_uml.jpg}
+ \includegraphics[width=400pt,keepaspectratio=true]{../master_uml.jpg}
  % cfg2.jpg: 702x464 pixel, 72dpi, 24.76x16.37 cm, bb=0 0 702 464
  \caption{Complete UML diagram}
  \label{fig:cfg2}
@@ -901,6 +901,12 @@ are added to  UML diagram in figure \ref{fig:cfg} and represented in figure \ref
 
 
 
+\subsection{Ontological work on FMEA}
+
+Ontological work on FMEA reviewed so far, has concentrated on
+formalising the natural language process of FMEA and thus
+defining relationships between components, failure modes and top level outcomes
+a good overview of this work may found here~\cite{ontfmea}.
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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diff --git a/old_thesis/mybib.bib b/old_thesis/mybib.bib
index ea06888..6bd88ea 100644
--- a/old_thesis/mybib.bib
+++ b/old_thesis/mybib.bib
@@ -32,6 +32,15 @@
 	keywords = "single-fault",
 	keywords = "fault-tolerance"
 }
+
+@ARTICLE{ontfmea,
+  AUTHOR =       "Lars Dittman et all",
+  TITLE =        "FMEA using Ontologies",
+  JOURNAL =      "18th International workshop on Qualitative Reasoning",
+  YEAR =         "2004"
+}
+
+
 @ARTICLE{bubba,
   AUTHOR =       "Ron Mancini",
   TITLE =        "Design of OP-Amp sine wave oscillators",
diff --git a/old_thesis/opamp_circuits_C_GARRETT/opamps.tex b/old_thesis/opamp_circuits_C_GARRETT/opamps.tex
index c48fa7a..00c9b85 100644
--- a/old_thesis/opamp_circuits_C_GARRETT/opamps.tex
+++ b/old_thesis/opamp_circuits_C_GARRETT/opamps.tex
@@ -1509,7 +1509,7 @@ $$ fm (PHS45) = \{ 90\_phaseshift, nosignal, 0\_phaseshift \} $$
 \subsection{Non Inverting Buffer: NIBUFF.}
 
 The non-inverting buffer functional group, is comprised of one component, an op-amp.
-We use the failure modes for an op-amp~\cite[mil1991}[p. to represent this group.
+We use the failure modes for an op-amp~\cite{mil1991}[p.3-116] to represent this group.
 % GARK
 $$ fm(NIBUFF) = fm(OPAMP) = \{L\_{up}, L\_{dn}, Noop, L\_slew \} $$