wiki:positions
Last modified 14 months ago Last modified on 07/12/2013 02:15:10 PM

Post doctoral positions

New technologies for data management in fundamental physics

Complex distributed data acquisition systems are required to operate modern scientific experiments. Recently a wide range of new technologies has been introduced, significantly increasing computing throughput (Parallel & GPU computing, Grids and Clouds) and enriching interactive and communication capabilities of web applications (HTML5, WebGL, WebCL). With the rapid grow of data rates, increasing complexity through interaction between measurement and simulation subsystems and the request to store scientific results traceable and referenceable, there is a rising demand for the rapid adoption of these new technologies and for new concepts in the areas of data management and scientific computing. Our objective is to design a flexible data management platform and on top of it to build customizable data portals for upcoming dark matter experiments. New methods for data organization utilizing the latest computing, database, visualization, and web technologies have to be developed. The platform should be tightly integrated with the data-center scale infrastructures, like the Large-Scale-Data-Facility (LSDF) at KIT. To push the co-operation within collaborations to a new level, an intuitive web portal providing simulation, visualization, and analysis capabilities has to be developed. Combination of cutting edge web technologies with advanced computing techniques and large-scale computer infrastructures will build the foundation for the next generation of analysis platforms.

Responsibilities:

  • Analyze new computing technologies relevant for data management and actively contribute to scientific collaborations by proposing and developing new methods of data organization.
  • Design and implement data management system for EURECA and maintain running systems for other experiments like KATRIN, KITcube, TOSKA.
  • Present results on conferences, publish research and technical articles, write grant proposals, and supervise students.

Qualification and Required Skills:

  • PhD in computer science, mathematics or physics.
  • Expertise in high performance computing, scientific data processing, parallel systems and software optimizations (knowledge of GPU computing is a plus)
  • Knowledge of cutting-edge database and web technologies

PhD topics

Advanced large-scale data management infrastructure for science

Huge quantities of information are produced by scientific experiments world wide. Data formats, underlying storage engines, and sampling rates are varying significantly. The components of large international experiments are often located in multiple, sometimes hardly accessible places, and are developed by only loosely connected research groups. To handle the distributed and heterogeneous nature of modern experiments, a conceptually new design of data management system is required. The goal of the project is to propose a new model for storage of large and growing archives of multi-dimensional time series. The model have to be implemented as a flexible and customizable data management framework applicable to a wide range of experimental conditions. It should provide the building blocks required to organize the data flow in scientific experiments and include components simplifying design of easy-to-use web interfaces for data analysis and visualization. The concept should be used for the mobile meteorological experiment KITcube that integrates about 30 complementary devices for atmospheric studies. Application to further experiments is foreseen. The task requires knowledge of broad areas of computer technology from high-speed parallel computing to database optimization, and web-based visualization. Emerging technologies should be studied to bring faster and more convenient interface to the users. Particulary, WebCL and WebGL are of extreme importance for web-based data analysis and visualization. A sophisticated techniques of data preprocessing and storage should be developed to quickly generate previews summarizing large quantities of data. The whole range of client platforms ranging from high-end visualization stations to hand-held multi touch smartphones has to be supported.

Qualification and Required Skills:

  • Master in Computer Science, Electrical Engineering, Physics, or Mathematics
  • Web technologies, database design, parallel programming, 3D rendering, mathematical statistics

Advanced control system for ultra fast X-ray imaging with GPU-clusters

The new Image beamline at the KITs synchrotron ANKA is dedicated to the investigation of structures in materials and organisms with a high spatial and temporal resolution. The imaging station consists of an X-ray optical system, a high-precision mechanical system and a set of high-speed cameras producing hundred thousands frames per second and a data rate of up to 4 GB/s. A novel image processing framework has been developed to simplify implementation of algorithms for modern parallel architectures with OpenCL and optimized for clustered environment. To operate this beamline, an intelligent fast control and data management system is required. The goal of this work is to build a beamline control system managing the data flow from the camera to the storage. Based on the image processing framework, the image-driven control loops have to be developed. Additional algorithms should be implemented, optimized and added to the framework. An intuitive control interface should allow an easy customization of control loops and data processing chain. Real-time visualization and manual interventions during the experiment is mandatory. For permanent data storage, the Large-Scale-Data-Facility (LSDF) at KIT will be used. It is necessary to connect the control system to the LSDF and design methods to allowing visual navigation through the stored data and fast access to the selected datasets. The control system finally will server as a prototype for the new generation of high-speed and high-throughput beamlines in the synchrotron community. The work is embedded in national and international collaborations for high data-rate processing.

Qualification and Required Skills:

  • Master in Computer Science, Mathematics or Physics
  • Strong C and Python knowledge, parallel computing architectures, numerical algorithms in image processing, 3D visualization techniques, data management, control theory, good understanding of natural sciences

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