The Carat research team has published a dataset focusing on collaborative energy diagnostics of mobile devices and applications

 

 

The Carat research team from University of Helsinki publishes a dataset from the Carat project (http://carat.cs.helsinki.fi/) focusing on collaborative energy diagnostics of mobile devices and applications. The dataset was presented at the IEEE PerCom’15 conference last spring in the publication "Energy Modeling of System Settings: A Crowdsourced Approach" that won the Marc Weiser Best Paper Award given at the conference.

The dataset contains different smartphone context factors, such as system settings and subsystem variables, and energy rates from 149,788 mobile devices of 2535 different Android models during 2013 and beginning of 2014. In total, there are 11,209,125 data items. They contain, for example, information about Wi-Fi and mobile network usage and quality, screen brightness levels, battery temperature and voltage measurements, and CPU usage. The data can be freely used for research and educational purposes.

 

In our work, we show how combinations of different system settings and subsystem variables can be used to model and predict energy usage of mobile devices. Some system settings have a direct and significant correlation with energy consumption, for example screen brightness and network connectivity. The energy impact of other system settings and their combinations can be much more difficult to predict, such as the combination of roaming, high operating temperature, and bad signal strength. Our work demonstrates that the energy impact of these non-trivial system setting combinations can be significant, and presents a new learning based method for assessing this impact.

Read more about the dataset and our research:

Ella Peltonen, Eemil Lagerspetz, Petteri Nurmi, and Sasu Tarkoma. Constella: Recommending System Settings the Crowdsourced Way. Pervasive and Mobile Computing. To appear 2016.

 

Online http://www.sciencedirect.com/science/article/pii/S1574119215001959

Ella Peltonen, Eemil Lagerspetz, Petteri Nurmi, and Sasu Tarkoma. Energy Modeling of System Settings: A Crowdsourced Approach. In Proceedings of the IEEE International Conference on Pervasive Computing and Communications, PerCom '15, St. Louis, MO, USA, March 23-27, 2015.

 

Online http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7146507

The Carat context factor dataset can be downloaded from our website http://carat.cs.helsinki.fi/#Research
 

 

 

Created date

26.11.2015 - 10:57

Application to Finnish computer science programmes 16 Mar-6 Apr 2016

 
The joint application to computer science programmes given in Finnish is open now.
 
 

Photo: Veikko Somerpuro 2016

 

International BOI 2016 programming contest at the Department of Computer Science

 

The best young programmers around the Baltic Sea will compete in May 2016 at the Department of Computer Science at the University of Helsinki in Baltic Olympiad in Informatics 2016.

 

 

 

 

 

Baltic Olympiad in Informatics (BOI) is a programming contest for countries around the Baltic Sea. The contest has been organized since 1995. This year BOI will take place in Helsinki May 11-15. The contest venue is the Department of Computer Science at the University of Helsinki.

Unique open online programming course starts again at Helsinki University

This is the fifth year in a row that the massive open online course (MOOC) will start at the University of Helsinki. Finns can take the course just for fun, as a part of their upper-secondary education, or even as an entrance exam to the university.

The course is free of charge, and it is so basic that students with no experience of programming can follow it.

Sasu Tarkoma new head of the Department of Computer Science

Since Jukka Paakki announced that he will step down from the post of head of the department on 1 January 2016, Professor Sasu Tarkoma has been elected the new head for the period 1 January 2016-31 December 2017. There were a total of 7 applicants for the position, out of whom the rector decided to appoint Tarkoma on the basis of the proposal by the dean of the Faculty of Science.

The staff of the department would like to congratulate Sasu and wish him success in his new duties. This is a good opportunity to ask our new leader some questions.