An overview is presented of different studies on monitoring and detection of drowsiness and microsleep (MS) during driving simulation.
Martin Golz David Sommer
In an overnight driving simulation study three commercially available devices of fatigue monitoring technologies (FMT) were applied to test their accuracy. 16 volunteers performed driving tasks during eight sessions (40 min each) separated by 15 minutes breaks. The main output variable of FMT devices, which is the percentage of eye closure (PERCLOS...
David Sommer Martin Golz
The aim of this paper is to develop signal processing based method to measure fatigue from motor behaviour. The advantages of this steering wheelmovement approach are that obtaining steering data within driving is robust, non obtrusive, free from sensor application and calibration efforts. Applying methods of continuous wavelet transform (CWT) prov...
Jarek Krajewski Martin Golz Sebastian Schnieder David Sommer
Fatigue Monitoring Technologies (FMT) aim at detecting dangerous states of subjects during driving. In a recently published technology report of Caterpillar Machine Research 35 FMT solutions were listed, whereby 22 of them were commercially available in 2006. Most of them utilize measurements of driver behavior such as video recordings of eyelid mo...
Martin Golz David Sommer Jarek Krajewski
Martin Golz David Sommer Udo Trutschel David J Edwards
This article describes a general framework for detecting sleepiness states on the basis of prosody, articulation, and speech-quality-related speech characteristics. The advantages of this automatic real-time approach are that obtaining speech data is nonobstrusive and is free from sensor application and calibration efforts. Different types of acous...
Jarek Krajewski Anton Batliner Martin Golz
There is growing acknowledgement that fatigue plays a significant role in traffic accidents. This study evaluated the relationship between fatigue-related accidents and Micro- Sleep Events (MSE) using a real car driving simulator. Ten healthy volunteers participated in the study for two nights each. After a period of struggling against sleep pressu...
Bill Sirois Udo Trutschel David J Edwards Martin Golz
This paper examined a steering behavior based fatigue monitoring system. The advantages of using steering behavior for detecting fatigue are that these systems measure continuously, cheaply, non-intrusively, and robustly even under extremely demanding environmental conditions. The expected fatigue induced changes in steering behavior are a pattern...
Jarek Krajewski David Sommer Udo Trutschel Martin Golz
In order to establish fatigue monitoring technologies a valid method for automatic detection of extreme central fatigue is needed. At present, acquisition of biosignals and their analysis by computational intelligence methods are most promising. We present experiments during which 10 volunteers drove overnight in our real car lab following a partia...
David Sommer Martin Golz Jarek Krajewski
A framework for automatic relevance determination based on artificial neural networks and an evolution strategy is presented. It is applied to an important problem in biomedicine, namely, the detection of unintentional episodes of sleep during sustained operations of subjects, so-called microsleep episodes. Human expert ratings based on video and b...
Martin Golz David Sommer
This paper describes a general framework for detecting affective and energetic states based on prosody, articulation and speech quality related speech characteristics. The advantages of this realtime approach are that obtaining speech data is non obstrusive, free from sensor application and calibration efforts. The main part of the feature computat...
Jarek Krajewski Rainer Wieland David Sommer Martin Golz
A combination of linear and nonlinear methods for feature fusion is introduced and the performance of this methodology is illustrated on a real-world problem: the detection of sudden and non-anticipated lapses of attention in car drivers due to drowsiness. To achieve this, signals coming from heterogeneous sources are processed, namely the brain el...
Martin Golz David Sommer Mo Chen Udo Trutschel
Alexander Gundel René Gerber Karel Marsalek Martin Golz
Zum Vol. I von: Computer science meets automation: 52. IWK, Internationales Wissenschaftliches Kolloquium ; proceedings ; 10 - 13 September 2007 Zum Vol. II von: Computer science meets automation: 52. IWK, Internationales Wissenschaftliches Kolloquium ; proceedings ; 10 - 13 September 2007
David Sommer Martin Golz
David Sommer Martin Golz LE Walther C Eurich
An adaptive biosignal analysis system for the detection of microsleep events is presented. The system was applied to the electroencephalogram and electrooculogram recorded of 23 young volunteers while performing monotonic overnight driving in our real car driving simulation laboratory. Biosignals during clear observable microsleep and non-microslee...
Martin Golz David Sommer Danilo Mandic
The aim of the present study was to evaluate if the occurrence of microsleep events in an overnight driving simulation task can be predicted by the score on the Karolinska sleepiness scale assessed before or after the drive. Twelve healthy volunteers performed the driving simulation task in five test runs separated by breaks of approximately 10 min...
Stefanie Richter Karel Marsalek David Sommer Alexander Gundel
In a preliminary study an Error Back Propagation Network (EBPN) has been applied for the determination of optical constants of thin Palladium films using reflectometric and ellipsometric data sets as network inputs. First results based on angle scan data sets confirm that EBPN is a viable tool for solving the inverse problem of determining thin fil...
Udo Trutschel Uwe Langbein M Markert Doos Tabarz
This paper introduces modifications of Self-Organizing Maps allowing imputation and classification of data containing missing values. The robustness of the proposed modifications is shown using experimental results of a standard data set. A comparison to modified Fuzzy cluster methods (Timm et al., 2002) is presented. Both methods performed better...
David Sommer Tobias Grimm Martin Golz
Attenuated-total-reflection spectra obtained by the optical excitation of surface plasmon polaritons can be interpreted in terms of two different virtual modes. It is shown that the HWHM of absorptance as a function of the incidence angle can be described by the decay constant of one of the modes. The attenuated-total-reflection resonance angle, on...
Manfred Klopfleisch Martin Golz Udo Trutschel
We propose an improved method for attenuated-total-reflection experiments in the Otto configuration. This new technique overcomes the difficulties that arise from the nonuniformity of the air coupling gap. Thus attenuated-total-reflection measurements, under ideal adapted conditions, can be made for a wide range of wavelengths. The determination of...
Manfred Klopfleisch Martin Golz
A nonlinear matrix formalism that allows the calculation of the optical field within a nonlinear multilayer system is presented. Taking advantage of this technique, the field profiles are calculated and the dispersion relation of nonlinear guided waves in such configurations is derived. The numerical results reveal that several field profiles occur...
Udo Trutschel F. Lederer Martin Golz
A configuration for the excitation of surface plasmons in the infrared spectral region using ATR but without a coupling prism is presented. The technique is to place between the metal and the air a material which has a lower index of refraction than air so that the standard total internal reflection geometry is recovered. Experiments are performed...
A. Roeseler Martin Golz Udo Trutschel M. Abraham
A transfer matrix formalism is used to treat in a general way the optical response of different kind of metal superlattices. The dispersion relation of infinite and semi-infinite superlattices and the reflectivity of semiinfinite superlattices are calculated. Spatial dispersion is included via additional boundary conditions. Each unit cell of the s...
Udo Trutschel Martin Golz M. Abraham
A device with optical bistability is proposed well adapted to planar technology in the framework of integrated optics. The device is composed by a dielectric layer of Al2O3 deposited onto an InSb waveguide with defocussing Kerr-nonlinearity and a metal substrate. It works at the wavelength of 10.6 μm, where the refractive index of Al2O3 is lower th...
Udo Trutschel Martin Golz M. Abraham
