%info@http:://golem.fjfi.cvut.cz/wiki/root/GW4reports

\def\GWpar{
\label{sec:RemoteControlInterface}
Measurements are to be set up and shots initiated using the web interface of the
GOLEM tokamak, which can be seen in Figure \ref{fig:remote_control}.
%The URL address of this web interface is \url{http://golem.fjfi.cvut.cz/remote/control_room} 
%However,it is recommended to use the URL provided by the remote experiment personnel,
%because it will likely include the necessary access token. 
\par
 The whole system is designed with such  care and safety standards, that within the web control interface it is not possible to request technological parameters of the discharge that can harm the tokamak. Therefore, students can freely choose their parameters without the fear that they destroy any part of the device.
\par
The system is protected with an access token provided by the operators for the particular event. 
When visiting the
control interface for the first time, a form is displayed asking for the
\textbf{Identification} and (if not included in the URL) the \textbf{Access
  token}. The Identification is a user-name by which the current user wishes his
discharges to be identified in the database. The access token is a (secret) string of
characters giving access at a specific level of device control. Access tokens
typically have an associated expiry time (typically used for excursions or
on-off events) and possibly a discharge request quota.
\par
Typically, a set of
URLs is provided by the local support to the remote operating group. These URLs
typically contain encoded in them the access token and possibly the
identification. These links can then be easily sent to the individual members of the
remote group via electronic means of communication, or simply displayed as QR
code for them to scan with their smartphones. The latter option is typically
used for excursions to the tokamak or other short demonstrations.
\par
\GWif{width=0.75\tw}{Handling/Controll/RemoteControl/OnlineExperimentalApplication/RemoteControlInterface/fig}
\par
The left part of the top navigation bar contains links to 4 pages of the remote control
interface. These are in order:
\begin{itemize}
\item \textbf{Introduction:} This page features video and other materials
  introducing the user to the GOLEM tokamak and its handling.
\item \textbf{Control room:} This is the actual page shown in \autoref{fig:remote_control} for setting up discharge
  configuration requests and submitting them to the requests queue. This page is
  described in greater detail below.
\item \textbf{Live:} This page displays a live, real-time (up to a $\sim 10$~s
  delay) view of the tokamak chamber and room IP cameras, the current state
  of the machine (capacitor voltages, working gas pressure, discharge procedure progress) and the discharge
  requests queue.
\item \textbf{Results:} This page lists a table of executed discharges for the
  currently logged-in user. The table contains links to discharge results as well.
\end{itemize}
\par
The right part of the top navigation bar contains information regarding the
currently logged-in user and
access level and a help button. Clicking the user-name will redirect to a form
offering to change the user-name (Identification). Clicking the access level
will redirect to a form offering to change the access level with an appropriate
access token.
\par
The remote control room interface shown in~\autoref{fig:remote_control} consists
of 2 columns. The 2 columns
  are side-by-side only on a wide, desktop-like
display, on a narrow mobile-like display the columns responsively stack
vertically. The left column contains a panel with 6 tabs at the top. Each tab
corresponds to a step in the discharge setup procedure configuring a given
tokamak sub-system.
\par
The right column contains a rendering of the 3D tokamak
model which dynamically changes according to the currently selected tab. The
rendering window can either show static images (default, fast), or an interactive 3D
model based on X3DOM browser technology (slower). The latter requires a computer or
mobile device with sufficient graphics rendering capabilities. The rendering
method can be selected below the rendering window.
\par
Each  tab in the left column contains at least one of the following:
\begin{itemize}
\item brief information about the setup step
\item  an engineering schematic of the
  tokamak sub-systems with the one currently being configured highlighted (the full engineering scheme can be seen in Figure \ref{fig:live})
\item  a slider widget for selecting a parameter value from a numerical range
\item  checkboxes for selecting mutually-exclusive options
\item a \textbf{Next} button which switches to the next tab (configuration step)
\item a \textbf{Set recommended value} button
\end{itemize}
\par
It is possible to arbitrarily switch between tabs, for instance when one wishes to
go back to a previous setup step.
\par
The availability of specific tabs and configurable controls on them is controlled by the access
level specified by the access token. This enables tailoring of the user
experience to the remote operation task at hand, e.g. removing hiding and
pre-configuring more complicated controls for remote user groups which are
performing only introductory experiments.
}