PhD ceremony: Mr. H. Buddelmeijer, 13.15 uur, Doopsgezinde kerk, Oude Boteringestraat 33, Groningen
Dissertation: Query driven visualization of large scale multi-dimensional astronomical catalogs
Promotor(s): prof. E.A. Valentijn, prof. S.C. Trager, prof. J.B.T.M. Roerdink
Faculty: Mathematics and Natural Sciences
Billions of sources are detected with modern telescopes, for which hundreds of parameters are quantified. New techniques are necessary for interactive exploration of these large datasets. A query driven way of visualization is introduced in this thesis to achieve both scalability and flexibility.
An important aspect in this is storing information on how the astronomical data is processed. Not only does this clarify how existing datasets have been derived, but it also allows new datasets to be generated automatically. The result of this is that discovering existing data and creating new data is performed in the exact same manner: by requesting it. Data requests can be formulated independent of implementation. This makes it possible to request the data from within the visualization software itself.
New data is only created when the existing data is not suitable to fulfil such a request. This new data will automatically be defined such that it is most suitable for reuse for later requests. However, only the part of the data that is required for the visualization is actually processed, ensuring scalability. Furthermore, data is only stored if reprocessing on demand is too time-consuming.
Neither the scientist nor the visualization software has to worry about creating data in a scalable and reusable way, because this is all automated. Therefore, query driven visualization gives scientists more time for the research they want to perform with their data, because the data administration is implicit.
Older people with memory problems who live at home are extraordinarily resourceful when it comes to staying in control of their activities outside the home. Demographers Jodi Sturge and Mirjam Klaassens are certainly impressed. ‘It’s not about...
Scientists at SRON, VU and RUG have now developed a model that predicts whether there is a carbon cycle present on exoplanets, provided the mass, core size and amount of CO2 are known.
On 26 April, Amina Helmi (Bahia Blanca, Argentina, 1970) was appointed Knight in the Order of the Dutch Lion. She is Professor of Dynamics, Structure and Formation of the Milky Way at the Kapteyn Astronomical Institute, which is part of the Faculty...
The UG website uses functional and anonymous analytics cookies. Please answer the question of whether or not you want to accept other cookies (such as tracking cookies).
If no choice is made, only basic cookies will be stored. More information