User: rhaas Date: 2013/07/26 12:04 PM

Modified: /et_intro_details/ et_intro_details.tex /handson_analysis/ handson_analysis.tex

Log: save state on et_intro and handson_analysis

File Changes:

Directory: /et_intro_details/ =============================

File [modified]: et_intro_details.tex Delta lines: +1 -1 =================================================================== --- et_intro_details/et_intro_details.tex 2013-07-26 17:04:29 UTC (rev 24) +++ et_intro_details/et_intro_details.tex 2013-07-26 17:04:35 UTC (rev 25) @@ -171,7 +171,7 @@ \item assemble directory structure \item simplify update of modules \item show local changes in all thorns -\item operates on \texttt{thornlist} describing collection of thorns +\item operates on \texttt{ThornList} describing collection of thorns \end{itemize}

\end{frame}

Directory: /handson_analysis/ =============================

File [modified]: handson_analysis.tex Delta lines: +16 -40 =================================================================== --- handson_analysis/handson_analysis.tex 2013-07-26 17:04:29 UTC (rev 24) +++ handson_analysis/handson_analysis.tex 2013-07-26 17:04:35 UTC (rev 25) @@ -5,7 +5,7 @@ \newcommand{\Heaviside}{\operatorname{\Theta}}

\subtitle[Analysis hands-on]{{\large Einstein Toolkit -Workshop}\*[0.3em]Hands-on exercise: tracking stars} +Workshop}\*[0.3em]Hands-on exercise: center of mass} \author{Roland Haas} \date{Jul 26 2013}

@@ -32,59 +32,35 @@

\begin{frame} \frametitle{Problem description} -\begin{block}{Requirements} - \begin{itemize} - \item be able to pick out a single neutron star, among several - \item roughly track the neutron star centre - \item be reasonably fast - \item be easy to use - \end{itemize} -\end{block} \begin{block}{Ansatz} - \begin{itemize} - \item compute centre of mass $X^i = \int \rho(x^i),x^i,d^3x / \int \rho(x^i),d^3x$ - \item use distance from last known location to distinguish between - stars - \item use density to limit centre of mass to central region to remove - influence of outflowing tails - \end{itemize} + Compute centre of mass +\begin{equation} +X^i = \int \rho(x^i),x^i,d^3x / \int \rho(x^i),d^3x +\end{equation} \end{block} -\end{frame} - -\begin{frame}[containsverbatim] -\frametitle{Recipe in formulae} \begin{block}{What to compute} \begin{align*} - M &= \int \Heaviside(\rho - \rho_{\text{min}}) - \Heaviside(R_{\text{max}} - |x^i - x^i_{\text{old}}|) - \rho,d^3x \ - X^i&= \left( - \int \Heaviside(\rho - \rho_{\text{min}}) - \Heaviside(|x^i - x^i_{\text{old}}| - R_{\text{max}}) - \rho,x^i,d^3x \right) / M + M &= \int \rho,d^3x \ + X^i&= \left(\rho,x^i,d^3x \right) / M \end{align*} \end{block} \begin{block}{Does this fit into code?} - Certainly. - \begin{itemize} - \item $\int$ $\rightarrow$ - \parbox{.75\linewidth}{\begin{alltt}core_density_x[idx] = \ldots;\\vdots\CCTK_Reduce(\ldots,handle_sum,\ldots,core_density_x,\ldots);\end{alltt}} - \item $\Heaviside$ $\rightarrow$ \verb|if(...)| - \end{itemize} + Certainly.\ + $\int$ $\rightarrow$ + \parbox{.75\linewidth}{ + \begin{alltt} + comIntegrandX[idx] = \ldots;\ + \vdots\ + CCTK_Reduce(\ldots,handle_sum,\ldots,varindex,\ldots); + \end{alltt}} \end{block} \end{frame}

\begin{frame} \frametitle{Entities to define} \begin{itemize} - \item<1-> \texttt{param.ccl} + \item<1-> \texttt{interface.ccl} \begin{alltt}\color{blue} - CCTK_REAL density_threshold\ - CCTK_REAL core_radius\ - CCTK_REAL inital_core_{x,y,z} - \end{alltt} - \item<2-> \texttt{interface.ccl} - \begin{alltt}\color{blue} CCTK_REAL core_density_gf type=gf\ \hspace{1cm}core_density_{x,y,z}\ \hspace{1cm}core_density\