In order to enable an iCal export link, your account needs to have an API key created. This key enables other applications to access data from within Indico even when you are neither using nor logged into the Indico system yourself with the link provided. Once created, you can manage your key at any time by going to 'My Profile' and looking under the tab entitled 'HTTP API'. Further information about HTTP API keys can be found in the Indico documentation.
Additionally to having an API key associated with your account, exporting private event information requires the usage of a persistent signature. This enables API URLs which do not expire after a few minutes so while the setting is active, anyone in possession of the link provided can access the information. Due to this, it is extremely important that you keep these links private and for your use only. If you think someone else may have acquired access to a link using this key in the future, you must immediately create a new key pair on the 'My Profile' page under the 'HTTP API' and update the iCalendar links afterwards.
Permanent link for public information only:
Permanent link for all public and protected information:
While the ray model is outdated as a physical theory, it is still an extremely valuable conceptual and computational tool for the design and modeling of optical systems. It is therefore important to know the limits of its validity as well as its connection to the more physical wave framework.
Its importance is partly due to the fact that it corresponds to a limiting case of the wave theory in several situations, including those of short wavelength (in many different ways) and statistical incoherence. Accurate wave field estimations can result from the ray model if a suitable framework is employed. In this talk, an overview is given of the many ways in which the ray and wave models can be related. Some of these approaches rely on "dressing" rays with wave contributions, while others make use of what is known as Wigner functions, which are mathematical representations also used in signal analysis and quantum physics. The mathematical analogy between the ray-wave and the classical-quantum connections will also be discussed.