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Open access

Matthias Frank

.M., Baan J. (2001), Spa- tial fluctuations in measures for spaciousness , The Journal of the Acoustical Society of America, 110 , 2, 947-954. 11. Frank M., Sontacchi A. (2012), Performance re- view of an expert listening panel , [in:] Fortschritte der Akustik, DAGA, Darmstadt. 12. Frank M., Sontacchi A., Höldrich R. (2010), Training and guidance tool for listening panels , [in:] Fortschritte der Akustik, DAGA, Berlin. 13. Frank M., Marentakis G., Sontacchi A. (2011), A simple technical measure for the perceived source

Open access

Franz Zotter and Matthias Frank

. 4. Frank M., Marentakis G., and Sontacchi A. (2011), A simple technical measure for the perceived source width , [in:] Fortschritte der Akustik, DAGA , D¨usseldorf. 5. Gerzon M. A. (1992), Signal processing for simulating realistic stereo images , [in:] Preprint 3423, 93rd Conv. Audio Eng. Soc. , San Francisco. 6. Gerzon M. A. (1993), Stereophonic signal processor generating pseudo stereo signals , Patent, WO 93/25055. 7. Hidaka T., Beranek L. L., Okano T. (1995), Interaural cross-correlation, lateral fraction

Open access

Frank Swann

Abstract

Making further inroads into the reduction of fire deaths and injuries in the home is a clear ambition of the UK Chief Fire Officers Association (UK CFOA) and fire-fighters alike. Despite significant falls in the number of people whose lives are blighted by the effects of a domestic fire, the UK still feels it can do more to eradicate fired deaths and injuries.

As this paper will show a consistent campaign to get smoke detectors installed in all properties, existing and new build, has had a dramatic effect. However the UK CFOA has now identified that the next steps to achieve their ambition of 0 fire deaths is to ensure that properties have installed domestic sprinkler systems that will activate in the early stages of a fire.

The campaign has started and the evidence is already starting to build that more lives can be saved!

Open access

Journal of Electrical Engineering

The Journal of Slovak University of Technology

Open access

Peter Farkaš and Frank Schindler

Abstract

Recently a new construction of run length limited block error control codes based on control matrices of linear block codes was proposed. In this paper a similar construction for obtaining trellis run length limited error control codes from convolutional codes is described. The main advantage of it, beyond its simplicity is that it does not require any additional redundancy except the one which is already contained in the original convolutional error control code. One example is presented how to get such a code from a convolutional low density parity check code.

Open access

Boyan Tomovski, Frank Gräbner, Axel Hungsberg, Christian Kallmeyer and Mario Linsel

Effects of Electromagnetic Field Over a Human Body, Sar Simulation with and Without Nanotextile in the Frequency Range 0.9-1.8GHZ

Within only the last decade, usage of mobile phones and many other electronic devices with high speed wireless RF connection is rapidly increasing. Modern life requires reliable, quick and high-quality information connections, which explains the widely spreading craze for electronic mobile devices of various types. The vast technological advances we are witnessing in electronics, electro-optics, and computer science have profoundly affected our everyday lives.

Meanwhile, safety concerns regarding the biological effects of electromagnetic (EM) radiation have been raised, in particular at a low level of exposure which we everyday experience. A variety of waves and signals have to be considered such as different sine waves, digital signals used in radio, television, mobile phone systems and other information transfer systems. The field around us has become rather complicated and the "air space is getting more and more dense with RF. The establishing of safety recommendations, law norms and rules augmented by adequate measurements is very important and requires quite an expertise.

But as many scientific researches suggest, what we are currently witnessing is very likely to generate a great public danger and a bad influence over the human body. There are many health organisations warning the public for possible development of cancer, mental and physical disorders etc [7, 8]. These suggestions are quite serious and should not be neglected by the official bodies and the test laboratories.

In the following work, the effects of electromagnetic field over a virtual model of a human head have been simulated in the frequency range from 900 MHz to 1800 MHz (commonly created in the real life by mobile GSM system) with the help of the program MEFiSTo 2D Classic [1]. The created virtual models using the 2D simulation & computation software proved that the use of new high tech nanotextile materials for shielding layers around the human body can reduce the effects of EM fields dramatically if chosen properly according to the area of application.

Open access

Peter Farkaš and Frank Schindler

Abstract

In this manuscript a simple method is presented for constructing run length limited error control codes from linear binary block codes. The run length limited properties are obtained via addition of a carefully chosen fixed binary vector - a modifier to all codewords without introducing any additional redundancy. Modifier selection is based on a specific property, which can be found in some of the linear binary block codes control matrices. Similar known methods are based on properties of generator matrices. However some codes are specified via control matrices, for example low density parity check codes. The method proposed in this letter could be applied to some of them directly. This is illustrated in this manuscript using example in which a run length limited low density parity check code is obtained from Gallager code.

Open access

Juraj Racko, Miroslav Mikolášek, Peter Benko, Ondrej Gallo, Ladislav Harmatha, Ralf Granzner and Frank Schwierz

Coupled Defect Level Recombination in the P—N Junction

The well known Shockley-Read-Hall (SRH) model considers emission and capture processes at defects exhibiting a single level or multiple non-coupled levels in the band gap of the semiconductor. The present paper generalizes the model to the case of two mutually coupled defect levels acting as trapping centres. If the intercenter transition is not considered, the model reduces to the case of two non-coupled levels treated by the SRH model.

Open access

Lukas Köping, Thomas Mühsam, Christian Ofenberg, Bernhard Czech, Michael Bernard, Jens Schmer and Frank Deinzer

Abstract

In this paper we present an indoor localization system based on particle filter and multiple sensor data like acceleration, angular velocity and compass data. With this approach we tackle the problem of documentation on large building yards during the construction phase. Due to the circumstances of such an environment we cannot rely on any data from GPS, Wi-Fi or RFID. Moreover this work should serve us as a first step towards an all-in-one navigation system for mobile devices. Our experimental results show that we can achieve high accuracy in position estimation.

Open access

Paweł Banyś, Frank Heymann, Evelin Engler and Thoralf Noack

Abstract

Since its deployment in 2004, the Automatic Identification System (AIS) has been considered a significant improvement of watchkeeping duties at sea. According to current regulations, AIS has not been recognised as an approved anticollision instrument yet. However, it would be difficult to rule out a possibility that AIS, being an essential part of the onboard SOLAS — compliant configuration, is unaidedly used for collision avoidance tasks. Recent research activities of DLR's Department of Nautical Systems have shown that AIS transmissions may contain a lot of incomplete data and the system does not have any dependable information on its data integrity. For that reason, the computation of the closest point of approach (CPA) and the time to the CPA (TCPA) are analysed based on AIS data involving multiple vessels, in order to compare the predictions with factual approaches between vessels and to evaluate the usability of AIS data, in its present form, for the appraisal of the traffic situation around each vessel.