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Said A.,TU Berlin | Berkovsky S.,CSIRO | Berkovsky S.,NICTA | De Luca E.W.,Potsdam University of Applied Sciences
ACM Transactions on Intelligent Systems and Technology | Year: 2013

The challenge and workshop on Context-Aware Movie Recommendation (CAMRa2010) were conducted jointly in 2010 with the Recommender Systems conference. The challenge focused on three context-aware recommendation scenarios: time-based, mood-based, and social recommendation. The participants were provided with anonymized datasets from two real-world online movie recommendation communities and competed against each other for obtaining the highest accuracy of recommendations. The datasets contained contextual features, such as tags, annotation, social relationsips, and comments, normally not available in public recommendation datasets. More than 40 teams from 21 countries participated in the challenge. Their participation was summarized by 10 papers published by the workshop, which have been extended and revised for this special section. In this preface we overview the challenge datasets, tasks, evaluation metrics, and the obtained outcomes. © 2013 ACM.


Kronemann M.L.,Potsdam University of Applied Sciences | Hafner V.V.,Humboldt University of Berlin
DIS 2010 - Proceedings of the 8th ACM Conference on Designing Interactive Systems | Year: 2010

Emergence is a concept that is not easy to grasp, since it contradicts our idea of central control and planning. In this work, we use a swarm of robots as a tangible tool to visualize interactions as the underlying principle of emergence. We utilize phosphorescent sheet (i.e. glow-in-the-dark foil) that can be activated with UV LEDs to visualize local information transfer between the robots in form of fading luminescent trails. The robots are specially designed to be both easy-to-understand and easy-to-build. They are a low-cost kit that can allow non-professionals to explore collective behaviour. By playing with the robots, they can get an understanding of complex systems such as emergence or Ant Colony Optimization algorithms in an automatic and playful way. © 2010 ACM.


Sebastian M.,Potsdam University of Applied Sciences
International Journal of Agricultural and Environmental Information Systems | Year: 2016

The growing amount of gathered, stored and available data is creating a need for useful mass-data visualizations in many domains. The mapping of large spatial data sets is not only of interest for experts anymore, but, with regard to the latest advances in web cartography, also moves into the domain of public cartographic applications. One interactive web-based cartographic interface design pattern that helps with visualizing and interacting with large, high density data sets is the marker cluster; a functionality already in use in many web-based products and solutions. In this article, the author will present their ongoing research on the problem of "too many markers." They will present an empirical evaluation and comparison of marker cluster techniques and similar approaches, including heatmaps and tiled heatmaps. They conclude with a first concept for overcoming some of the obstacles that they were able to identify in their study and thereby introduce a new direction for further research. © Copyright 2016, IGI Global.


Gottlich P.,Potsdam University of Applied Sciences
Beton- und Stahlbetonbau | Year: 2012

Deflections in reinforced concrete frames must already be sufficiently limited during design. The Eurocode 2, which will be implemented in 2012 in Germany, provides new rules, which are clearly more demanding than those of the DIN 1045 (issue 1988 and current issue 2008).The rules in EC2 are however, by their nature, not design equations from which the member dimensions can be directly determined. Therefore they are normally used for final verification of the design. To overcome this, design graphs, based on the design equations of EC2, have been prepared. These are meant to significantly help architects and engineers in the early stages of design by avoiding an iterative procedure as far as possible. Copyright © 2012 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.


Hoinkis M.,Potsdam University of Applied Sciences
Conference on Human Factors in Computing Systems - Proceedings | Year: 2012

Herzfassen is a self-contained kinetic object that uses physical computing and biometric data to provide a highly aesthetic and sensual experience while still having the outer appearance of an ordinary everyday object. A metal bowl filled with water visualizes the human heartbeat through vibration and according patterns in the water surface. The title Herzfassen derives from the german expression for 'to take heart' thus hints to the haptic and emotional experience with the object. This paper describes aim and design of the piece, comprising construction, technical function, as well as the interaction cycle respectively the object's dramaturgy. Further, it reports on audience's joyful and emotional experiences with the object within past exhibitions as display and use hence human contact is the main purpose of Herzfassen. © 2012 Author.

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