Prof. Dr. Jürgen Döllner

Willy Scheibel

Willy Scheibel

Research assistent with focus on hierarchical data processing and visualization.


Tel.: +49-(0)331 5509-3914
Fax: +49-(0)331 5509-172
Room: H-2.21
Email: willy.scheibel(at)hpi.de


ResearchGate: https://www.researchgate.net/profile/Willy_Scheibel
Google Scholar: https://scholar.google.de/citations?user=SBLqi_QAAAAJ
Website: http://www.willyscheibel.de/
Github: https://github.com/scheibel


Design and Implementation of Web-Based Hierarchy Visualization Services

Scheibel, Willy; Hartmann, Judith; Döllner, Jürgen in 10th International Conference on Information Visualization Theory and Applications (IVAPP) 2019 .

There is a rapidly growing, cross-domain demand for interactive, high-quality visualization techniques as components of web-based applications and systems. In this context, a key question is how visualization services can be designed, implemented, and operated based on Software-as-a-Service as software delivery model. In this paper, we present concepts and design of a SaaS framework and API of visualization techniques for tree-structured data, called HiViSer. Using representational state transfer (REST), the API supports different data formats, data manipulations, visualization techniques, and output formats. In particular, the API defines base resource types for all components required to create an image or a virtual scene of a hierarchy visualization. We provide a treemap visualization service as prototypical implementation for which subtypes of the proposed API resources have been created. The approach generally serves as a blue-print for fully web-based, high-end visualization services running on thin clients in a standard browser environment.
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Teaching activities

Summer Term 2019

  • Lecture "Fundamentals of Software Analytics" (lecturer and tutor)

Winter Term 2018/2019

  • Lecture "Introduction to Software Analytics" (lecturer and tutor)
  • Lecture "Introduction to Software Analytics (MA)" (lecturer and tutor)
  • Seminar "Visualization Algorithms and Techniques" (tutor)

Summer Term 2018

  • Seminar "Games of Life" (tutor)
  • Seminar "Advanced Games of Life" (tutor)

Winter Term 2017/18

  • Seminar "Advanced Development in C++" (lecturer & tutor)

Summer Term 2017

  • Lecture "Advanced Programming Techniques for C++" (tutor)
  • Seminar "Advanced Information Visualization" (tutor)

Winter Term 2016/1017

  • Lecture "Advanced Programming in C++" (tutor)
  • Seminar "Methods and Techniques of Information Visualization" (supervisor)
  • Masters Project "Real-time Monitoring of Massive File Systems" (supervisor)

Summer term 2016

  • Lecture "Computer Graphics II" (tutor)
  • Seminar "Methods and Techniques of Software Visualization" (tutor)
  • Bachelor project "Massive Information Mining for Software Analytics" (supervisor)

Winter term 2015/2016

  • Lecture "Computer Graphics I" (tutor)
  • Seminar "Systems Engineering for Software Analytics" (tutor)
  • Bachelor project "Massive Information Mining for Software Analytics" (supervisor)

Summer term 2015

  • Lecture "Computer Graphics I" (tutor)
  • Seminar "Visual Software Analytics" (tutor)
  • Seminar "Programmierung computergrafischer Verfahren mit C++ und OpenGL" (tutor & co-lecturer)
  • Bachelor project "Software Analytics" (supervisor)

Winter term 2014/2015

  • Lecture "Computer Graphics II" (tutor)
  • Seminar "Visualization for Interactive Software Analytics" (tutor)
  • OpenHPI course "Automated Visual Software Analytics" (tutor)
  • Bachelor project "Software Analytics" (supervisor)

Summer term 2014

  • Seminar "Grafikprogrammierung mit OpenGL und C++" (co-lecturer)
  • Seminar "Information Visualization" (co-tutor)

Winter term 2013/2014

  • Seminar "Software-Analyse und Visualisierung" (co-tutor)