Rainer Muller

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Task-oriented repetitive movement can improve movement performance in patients with neurological lesions. The application of robotics can serve to assist, enhance, evaluate and document rehabilitation of movements. ARMin is a robot for arm therapy applicable to the arm training in clinics. It has an exoskeleton structure and is equipped with position and(More)
We address bit error probability of the optimum multiuser detector for multi-carrier code division multiple access in frequency-selective fading channels. We use the replica method, a tool from statistical physics, to calculate the bit error probability in the large system limit for randomly assigned spreading sequences. The analysis allows for binary input(More)
Computer-based recording of live presentations has become a widespread way of producing content material for e-learning in both higher education institutions and companies. The success of e-learning projects crucially depends on the acceptance by the end-users working with these materials, i.e., learners but also administrators. From their point of view,(More)
The goal of the SLOTH family of operating system kernels is to provide a unified priority space to the real-time applications. By automated mapping of tasks to interrupts, we eliminate rate-monotonic priority inversion and increase execution determinism. In its standard implementation, however, SLOTH has been criticized for being unsafe, since interrupt(More)
In this contribution, the double directional model derived within the maximum entropy framework in M. Debbah and R. Muller (2003) is studied. For a given power profile, an asymptotic analysis (in the number of antennas) is conducted on the achievable transmission limit using tools of random matrix theory. It is shown in particular that the optimal(More)
—Multi-core operating systems inherently face the problem of concurrent access to internal kernel state held in shared memory. Previous work on the SLOTH real-time kernel proposed to offload the scheduling decisions to the interrupt hardware, thus removing the need for a software scheduler; no state has to be managed in software. While our existing design(More)
—Traditional time-triggered operating systems are implemented by multiplexing a single hardware timer—the system timer—in software, having the kernel maintain dispatcher tables at run time. Our SLOTH ON TIME approach proposes to make use of multiple timer cells as available on modern micro-controller platforms to encapsulate dispatcher tables in the timer(More)
This paper describes the status of a joint project between Gemplus and ONERA. It presents an approach enabling a smart card issuer to verify that a new applet securely interacts with already loaded applets. A security policy has been defined that associates levels to applet attributes and methods and defines authorized flows between levels. We propose a(More)
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