Universiteit Leiden

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This Week’s Discoveries | 19 April 2016

Tuesday 19 April 2016
Gorlaeus Building
Einsteinweg 55
2333 CC Leiden
De Sitterzaal

First Lecture

Title An efficient procedure to analyse various types of queues
Speaker Laurens Smit (MI)

Laurens Smit is a PhD student in the Operations Research (OR) group of the Mathematical Institute. He will defend his PhD thesis in May.

In this talk we will discuss a particular type of networks applications: queues. Many queueing systems are present around us and occur frequently. The analysis of the behaviour of these systems is a broad research area, wherein it is particularly important to find the average waiting time for a customer in a queue and the average length of a queue. We describe how to model a queue as a network and show how one can use this network to compute the performance of a queue. We will discuss our own research that focuses on a specific characteristic present in the structure of many networks and explain how we can exploit this characteristic to analyse a queue efficiently and fast.

Second Lecture

Title Exoplanets and the search for extraterrestrial life
Speaker Ignas Snellen ( Leiden Observatory)

Ignas is full professor in observational astrophysics at the Leiden Observatory. His group develops observation and data-reduction techniques for ground-based telescopes, particularly geared to be used for the future extremely large telescopes (ELT). Important successes have been reached using high-dispersion spectroscopy, in which the planet light is separated from the much brighter starlight using its unique spectral features combined with time-differential and/or spatial separation techniques - techniques often developed in his team. Most of the time, the telescopes on La Palma (Canary Islands, Spain) and those from the European Southern Observatory (La Silla & Paranal, Chile) are used for this research. Ignas received an ERC advanced grant last month for his research proposal on exoplanets

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