Energy consumption is a major factor that limits the performance of sensor applications. Sensor nodes have varying sampling rates since they face continuously changing environments. In this paper, the sampling rate is modeled as a random variable, which is estimated over a finite time window. We presents an online algorithm to minimize the total energy consumption while satisfying sampling rate...

Rescue robots operate in disaster areas where odometric information is known to be highly unreliable. This paper presents a new approach to odometry independent 2D robot mapping. Scans obtained from different robot positions are assembled to a single global map using alignment based on scan intrinsic information only, namely shape features. The approach detects geometric structures in different...

The growing popularity of computer networks has led researchers to attempt to develop distance learning systems. However, students in network-based learning environments may need additional guidance and assistance when they encounter problems in learning certain concepts. Therefore, how to provide testing and diagnostic mechanisms in a computer-assisted learning environment is an important issu...

As computer applications keep growing in complexity, humancomputer interaction must keep the pace accordingly. Being the most important human sense, eye sight is considered a powerful new solution for enhancing communication with computers. Recent progress in eye tracking research outlines several applicability opportunities in the fields of virtual environment, augmented reality, computer navi...

The increasing importance of mobility, ubiquitous IT access, and dynamic allocation of adaptable content causes more and more integration of pervasive computing technology into learning processes. This thesis analyzes the infrastructural challenges for pervasive environments in general and especially pervasive universities. Based on this analysis, the applicability of todays communication model...

People with disabilities encounter serious limitations in interacting with their home environment since their requirements are not met properly. Personal assisting devices interacting with the services offered by smart home environments can help to improve the quality of their lives. A major prerequisite for this is to provide an appropriate customization architecture which allows to reason abo...

We study the problem of achieving cooperation between two self-interested agents that play a sequence of randomly generated normal form games, each game played only once. To achieve cooperation we extend a model used to explain cooperative behavior by humans. We show how a modification of a pre-regularized particle filter can be used to detect the cooperation level of the opponent and play acco...

Data traffic demand in cellular networks has been tremendously growing and has led to creating congested RF environments. Accordingly, innovative approaches for spectrum sharing have been proposed and implemented to accommodate several systems within the same frequency band. Spectrum sharing between radar and communications systems is one of the important research and development areas. In this...

Mobile computing devices and the services offered by them are utilized by millions of users on a daily basis. However, they operate in hostile environments getting exposed to a wide variety of threats. Accordingly, vulnerability management mechanisms are highly required. We present in this paper a novel approach for increasing the security of mobile devices by efficiently detecting vulnerable c...

In this paper we demonstrate our framework of facial motion retargeting. We define pairs of source and target expressions and their variable configurations. For a given new source expression the target variables are automatically adjusted accordingly. We use Radial Basis Function (RBF) based regression methods to define the relationship between source and target configurations. We also investig...