
diff -r e5dcf5ada84d -r ba35def0965b slides/slides08.tex
--- a/slides/slides08.tex	Wed Nov 09 02:00:09 2016 +0000
+++ b/slides/slides08.tex	Wed Nov 16 02:39:32 2016 +0000
@@ -69,13 +69,14 @@
 
 \begin{textblock}{2.5}(11.5,10)
 \begin{bubble}[2.5cm]
-\it anonymous? 
+  \it bitcoins cannot get lost,
+  all transactions are recorded
 \end{bubble}
 \end{textblock}
 
 \begin{textblock}{5}(3.5,4)
 \begin{bubble}[5cm]
-\it cannot be controlled by the government?
+\it not regulated by any government
 \end{bubble}
 \end{textblock}
 
@@ -87,7 +88,8 @@
 
 \begin{textblock}{5.7}(3,13)
 \begin{bubble}[5.7cm]
-\it it takes 0..10 mins to pay with Bitcoins
+  \it fixed amount of bitcoins in circulation (no inflation)
+  
 \end{bubble}
 \end{textblock}
 
@@ -97,15 +99,15 @@
 \end{bubble}
 \end{textblock}
 
-\begin{textblock}{2}(12,12.5)
-\begin{bubble}[2cm]
-\it mined by GPUs
-\end{bubble}
-\end{textblock}
+%\begin{textblock}{2}(12,12.5)
+%\begin{bubble}[2cm]
+%\it mined by GPUs
+%\end{bubble}
+%\end{textblock}
 
-\begin{textblock}{3.6}(10,2.3)
-\begin{bubble}[3.6cm]
-\it can be lost or stolen
+\begin{textblock}{3}(11,2.3)
+\begin{bubble}[3cm]
+\it bitcoins are anonymous
 \end{bubble}
 \end{textblock}
 
@@ -247,7 +249,7 @@
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \begin{frame}[t]
-\frametitle{Blockchain}
+\frametitle{Blockchain (Public Ledger)}
 
 The solution for double spend: 
 
@@ -268,7 +270,7 @@
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \begin{frame}[t]
-\frametitle{Blockchain}
+\frametitle{Blockchain (Public Ledger)}
 
 \begin{center}
 \includegraphics[scale=0.5]{../pics/bitcoinblockchain0.png}
@@ -409,6 +411,29 @@
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \begin{frame}[t]
+\frametitle{How to Adjust the Target?}
+
+\begin{itemize}
+\item every 2016 blocks the hardness is adjusted\\ (app 2 weeks)
+\end{itemize}
+
+\begin{center}
+\includegraphics[scale=0.37]{../pics/blockchainsolving.png}
+\end{center}
+
+\small
+\[
+\bl{\begin{array}{@{}l@{}}\text{New}\\ \text{Hardness}\end{array} \dn
+\begin{array}{@{}l@{}}\text{Old}\\ \text{Hardness}\end{array} 
+* \frac{\text{Actual time for the last 2016 blocks}}{2016}}
+\]
+
+\end{frame}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\begin{frame}[t]
 \frametitle{Bitcoin Schedule}
 
 \begin{itemize}
@@ -870,27 +895,40 @@
 
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\begin{frame}[t]
-\frametitle{Exam}
-
-
-\begin{itemize}
-  \item Questions will be from homeworks.
+%\begin{frame}[t]
+%\frametitle{Exam}
+%
+%
+%\begin{itemize}
+%  \item Questions will be from homeworks.
+%
+%  \item Rubric:
+%  \begin{center}\small
+%  \begin{tabular}{lp{7cm}}
+%  Time Allowed & Two hours\\ 
+%  Rubric       & ANSWER ALL QUESTIONS\\
+%  Calculators  & Calculators are not permitted\\
+%  Notes        & Books, notes or other written material 
+%  may not be brought into this examination\\
  \end{tabular}
+%  \end{center} 
+%\end{itemize} 
+%
+%\end{frame}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
 
-  \item Rubric:
-  \begin{center}\small
-  \begin{tabular}{lp{7cm}}
-  Time Allowed & Two hours\\ 
-  Rubric       & ANSWER ALL QUESTIONS\\
-  Calculators  & Calculators are not permitted\\
-  Notes        & Books, notes or other written material 
-  may not be brought into this examination\\
  \end{tabular}
-  \end{center} 
-\end{itemize} 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\begin{frame}[t]
+%\frametitle{Take Home Points}
+
+  \begin{center}
+  Next 2 weeks by Jose Such
+  \end{center}  
+      
 
 \end{frame}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
 
+
 \end{document}
 
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