Fakultät 4 Elektrotechnik und Informatik

953 Items

Recent Submissions
Automatic detection and assessment of swallowing based on bioimpedance and electromyography measurements

Nahrstaedt, Holger (2017)

Schluckstörungen komplizieren für die Betroffenen jegliche Nahrungs- und Flüssigkeitsaufnahme und können zu folgenschweren Erkrankungen führen. Durch den Verlust eines normalerweise perfekt koordinierten Zusammenspiels der Muskulatur wird der Kehlkopf und das Zungenbein nicht weit genug oder im falschen Augenblick nach oben und vorne gezogen. Dadurch wird der Zugang zu den unteren Atemwegen nic...

Assessing the depth of cognitive processing as the basis for potential user-state adaptation

Nicolae, Irina-Emilia ; Acqualagna, Laura ; Blankertz, Benjamin (2017)

Objective: Decoding neurocognitive processes on a single-trial basis with Brain-Computer Interface (BCI) techniques can reveal the user's internal interpretation of the current situation. Such information can potentially be exploited to make devices and interfaces more user aware. In this line of research, we took a further step by studying neural correlates of different levels of cognitive pro...

Distributed log analysis for scenario-based detection of multi-step attacks and generation of near-optimal defense recommendations

Kaynar, Kerem (2017)

Detecting related, ongoing actions of attackers is significant for providing a complete situational assessment of security and determining the most effective reactive defense measures for a network. The logs generated by software running across the network can be used for this purpose, since they may contain the traces of malicious activities occurring inside the network. Primary logs that indi...

On the use of MLDS in the study of depth and lightness perception

Aguilar Cornejo, Guillermo Andres (2017)

An open question in vision research is how to measure the perceptual dimension evoked by the stimulus in a reliable way. Although a variety of psychophysical procedures are available, it is still a challenge to find methods that are efficient and avoid critical confounds, such as strategies triggered by difficult and unnatural tasks used by discrimination methods. In this doctoral thesis I prop...

Quality-influencing factors in mobile gaming

Beyer, Justus Philipp (2017)

In the wake of the smartphone revolution, mobile games have not only become a spare time activity for the majority of phone owners, they have also created a prospering new industry. To thrive in an increasingly stiff competition, both game developers and service providers are seeking to improve their customers’ gaming experience and understand how it is affected by external influences in order ...

Consensus in multiagent systems

Parada Contzen, Miguel (2017)

During the last decade, the problem of consensus in multiagents systems has been studied with special emphasis on graph theoretical methods. Consensus can be regarded as a control objective in which is sought that all systems, or agents, in a network have an equivalent output value. This is achieved through a given control strategy usually referred to as consensus algorithm. The motivation to s...

A reconfigurable architecture for real-time image compression on-board satellites

Manthey, Kristian (2017)

Data products of optical remote sensing systems are increasingly used in many areas of our everyday life. The spatial as well as the spectral resolution of satellite image data increases steadily with new missions resulting in a higher precision of known procedures and new application scenarios. While the memory capacity requirements can still be fulfilled, the transmission capacity becomes inc...

Linking appearance to neural activity through the study of the perception of lightness in naturalistic contexts

Maertens, Marianne ; Shapley, Robert (2013)

The present paper deals with the classical question how a psychological experience, in this case apparent lightness, is linked by intervening neural processing to physical variables. We address two methodological issues: (a) how does one know the appropriate physical variable (what is the right x ?) to look at, and (b) how can behavioral measurements be used to probe the internal transformation...

A critical assessment of the importance of seedling age in the system of rice intensification (sri) in Eastern India

Deb, Debal ; Lässig, Jörg ; Kloft, Marius (2012)

A survey of the system of rice intensification (SRI)-related literature indicates that different authors have drawn conflicting inferences about rice yield performances under the SRI, chiefly because the SRI methodology has been variously advocated, interpreted and implemented in the field using different rice varieties, seedling ages at transplantation, cultivation seasons and nutrient managem...

Solidification and wetting behaviour of SnAgCu solder alloyed by reactive metal organic flux

Zerrer, Patrick ; Fix, Andreas ; Hutter, Matthias ; Reichl, Herbert (2010)

PURPOSE: The purpose of this paper is to develop a new alloying method for solders by using a metal organic modified flux in solder pastes. DESIGN/METHODOLOGY/APPROACH: This paper presents the impact of six metal organic compounds (Co, Fe, Al; stearate, oxalate, citrate) on the melting and solidification behaviour in comparison to the revealed microstructure. FINDINGS: It could be shown that Co...

libWater: heterogeneous distributed computing made easy

Grasso, Ivan ; Pellegrini, Simone ; Cosenza, Biagio ; Fahringer, Thomas (2013)

Clusters of heterogeneous nodes composed of multi-core CPUs and GPUs are increasingly being used for High Performance Computing (HPC) due to the benefits in peak performance and energy efficiency. In order to fully harvest the computational capabilities of such architectures, application developers often employ a combination of different parallel programming paradigms (e.g. OpenCL, CUDA, MPI an...

Low-power high-efficiency video decoding using general purpose processors

Chi, Chi Ching ; Álvarez-Mesa, Mauricio ; Juurlink, Ben (2015)

In this article, we investigate how code optimization techniques and low-power states of general-purpose processors improve the power efficiency of HEVC decoding. The power and performance efficiency of the use of SIMD instructions, multicore architectures, and low-power active and idle states are analyzed in detail for offline video decoding. In addition, the power efficiency of techniques suc...

A generic implementation of a quantified predictor on FPGAs

Thomas, Gervin ; Elhossini, Ahmed ; Juurlink, Ben (2014)

Predictors are used in many fields of computer architectures to enhance performance. With good estimations of future system behaviour, policies can be developed to improve system performance or reduce power consumption. These policies become more effective if the predictors are implemented in hardware and can provide quantified forecasts and not only binary ones. In this paper, we present and e...

An automatic input-sensitive approach for heterogeneous task partitioning

Kofler, Kofler ; Grasso, Ivan ; Cosenza, Biagio ; Fahringer, Thomas (2013)

Unleashing the full potential of heterogeneous systems, consisting of multi-core CPUs and GPUs, is a challenging task due to the difference in processing capabilities, memory availability, and communication latencies of different computational resources. In this paper we propose a novel approach that automatically optimizes task partitioning for different (input) problem sizes and different h...

A QHD-capable parallel H.264 decoder

Chi, Chi Ching ; Juurlink, Ben (2011)

Video coding follows the trend of demanding higher performance every new generation, and therefore could utilize many-cores. A complete parallelization of H.264, which is the most advanced video coding standard, was found to be difficult due to the complexity of the standard. In this paper a parallel implementation of a complete H.264 decoder is presented. Our parallelization strategy exploits ...

Composable local memory organisation for streaming applications on embedded MPSoCs

Ambrose, Jude ; Molnos, Anca ; Nelson, Andrew ; Cotofana, Sorin ; Goossens, Kees ; Juurlink, Ben (2011)

Multi-Processor Systems on a Chip (MPSoCs) are suitable platforms for the implementation of complex embedded applications. An MPSoC is composable if the functional and temporal behaviour of each application is independent of the absence or presence of other applications. Composability is required for application design and analysis in isolation, and integration with linear effort. In this paper...

Poster: implications of merging phases on scalability of multi-core architectures

Manivannan, Madhavan ; Juurlink, Ben ; Stenstrom, Per (2011)

Amdahl's Law estimates parallel applications with negligible serial sections to potentially scale to many cores. However, due to merging phases in data mining applications, the serial sections do not remain constant. We extend Amdahl's model to accommodate this and establish that Amdahl's Law can overestimate the scalability offered by symmetric and asymmetric architectures for such application...

Low-dimensional spike rate models derived from networks of adaptive integrate-and-fire neurons

Augustin, Moritz ; Ladenbauer, Josef ; Baumann, Fabian ; Obermayer, Klaus (2017)

The spiking activity of single neurons can be well described by a nonlinear integrate-and-fire model that includes somatic adaptation. When exposed to fluctuating inputs sparsely coupled populations of these model neurons exhibit stochastic collective dynamics that can be effectively characterized using the Fokker-Planck equation. This approach, however, leads to a model with an infinite-dimens...

How adaptation currents change threshold, gain, and variability of neuronal spiking

Ladenbauer, Josef ; Augustin, Moritz ; Obermayer, Klaus (2014)

Many types of neurons exhibit spike rate adaptation, mediated by intrinsic slow K+ currents, which effectively inhibit neuronal responses. How these adaptation currents change the relationship between in vivo like fluctuating synaptic input, spike rate output, and the spike train statistics, however, is not well understood. In this computational study we show that an adaptation current that pri...

How adaptation shapes spike rate oscillations in recurrent neuronal networks

Augustin, Moritz ; Ladenbauer, Josef ; Obermayer, Klaus (2013)

Neural mass signals from in-vivo recordings often show oscillations with frequencies ranging from <1 to 100 Hz. Fast rhythmic activity in the beta and gamma range can be generated by network-based mechanisms such as recurrent synaptic excitation-inhibition loops. Slower oscillations might instead depend on neuronal adaptation currents whose timescales range from tens of milliseconds to seconds....