| 1. |
- Elamalayil Soman, Deepak, et al.
(författare)
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Discontinuous conduction mode of a three-level boost DC-DC converter and its merits and limits for voltage cross regulation applications
- 2014
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Ingår i: Proceedings, IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society. - : IEEE conference proceedings. - 9781479940325 ; , s. 4268-4272
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Konferensbidrag (refereegranskat)abstract
- Distributed generation and smart grid integration of renewable energy sources introduce a lot of challenges for the enabling power electronic converter technology. Some of these challenges include wide controllability range, high power handling and good reliability. Three-level boost converter is one of the attractive solution for applications requiring voltage cross regulation such as three-level neutral point clamped inverter based grid integration of renewable sources. The present work shows the advantages and disadvantages of using discontinuous conduction mode of a Three-level boost converter for voltage cross regulation. The converter working principle, modes of operation and operating cases are listed briefly. The simulation results compare the DCM and CCM cross regulation effects. Based on these results, the controllability range of the converter is analyzed to understand the suitability of the converter for various applications.
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| 2. |
- Ouacha, Aziz, et al.
(författare)
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Wideband multibeam antenna for integration in small platforms in EuCAP 2010 - The 4th European Conference on Antennas and Propagation, vol , issue , pp 5505825
- 2010
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Ingår i: EuCAP 2010 - The 4th European Conference on Antennas and Propagation.
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Konferensbidrag (refereegranskat)abstract
- A wideband multibeam antenna for integration in small platforms such as UAVs has been demonstrated. The demonstration was performed on a single facet comprising an 8×4 bowtie antenna elements array and a beamforming network which includes both transmitter and receiver chains and can therefore be used in multifunction systems for EW and communication. The operating frequency band chosen for this demonstrator is 6 - 15 GHz. Due to the modularity of the concept, the demonstrated facet can either be used stand alone or forming a faceted array depending on the required field of coverage and/or platform structure. A compact and lightweight phased array concept for 360o coverage is also discussed.
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| 3. |
- Smeds, K., et al.
(författare)
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Objective measures to quantify the perceptual effects of noise reduction in hearing aids
- 2011
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Ingår i: Proceedings of the AES International Conference. ; , s. 101-108
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Konferensbidrag (refereegranskat)abstract
- Twenty listeners with hearing impairment evaluated three noise-reduction algorithms using paired comparisons of speech clarity, noise loudness, and preference. The subjective test produces results in terms of physical signal-to-noise ratios that correspond to equal subjective performance with and without the noise-reduction algorithms. This facilitates a direct test of how well a number of objective performance measures correspond with the subjective test results.
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| 4. |
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| 5. |
- Andersson, M. G., et al.
(författare)
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Separated by a common language : Awareness of term usage differences between languages and disciplines in biopreparedness
- 2013
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Ingår i: Biosecurity and bioterrorism. - : Mary Ann Liebert Inc. - 1538-7135 .- 1557-850X. ; 11:SUPPL. 1, s. S276-S285
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Tidskriftsartikel (refereegranskat)abstract
- Preparedness for bioterrorism is based on communication between people in organizations who are educated and trained in several disciplines, including law enforcement, health, and science. Various backgrounds, cultures, and vocabularies generate difficulties in understanding and interpretating terms and concepts, which may impair communication. This is especially true in emergency situations, in which the need for clarity and consistency is vital. The EU project AniBioThreat initiated methods and made a rough estimate of the terms and concepts that are crucial for an incident, and a pilot database with key terms and definitions has been constructed. Analysis of collected terms and sources has shown that many of the participating organizations use various international standards in their area of expertise. The same term often represents different concepts in the standards from different sectors, or, alternatively, different terms were used to represent the same or similar concepts. The use of conflicting terminology can be problematic for decision makers and communicators in planning and prevention or when handling an incident. Since the CBRN area has roots in multiple disciplines, each with its own evolving terminology, it may not be realistic to achieve unequivocal communication through a standardized vocabulary and joint definitions for words from common language. We suggest that a communication strategy should include awareness of alternative definitions and ontologies and the ability to talk and write without relying on the implicit knowledge underlying specialized jargon. Consequently, cross-disciplinary communication skills should be part of training of personnel in the CBRN field. In addition, a searchable repository of terms and definitions from relevant organizations and authorities would be a valuable addition to existing glossaries for improving awareness concerning bioterrorism prevention planning. © 2013, Mary Ann Liebert, Inc.
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| 6. |
- Felix, Richard A, et al.
(författare)
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Sound rhythms are encoded by postinhibitory rebound spiking in the superior paraolivary nucleus
- 2011
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Ingår i: Journal of Neuroscience. - 0270-6474 .- 1529-2401. ; 31:35, s. 12566-12578
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Tidskriftsartikel (refereegranskat)abstract
- The superior paraolivary nucleus (SPON) is a prominent structure in the auditory brainstem. In contrast to the principal superior olivary nuclei with identified roles in processing binaural sound localization cues, the role of the SPON in hearing is not well understood. A combined in vitro and in vivo approach was used to investigate the cellular properties of SPON neurons in the mouse. Patch-clamp recordings in brain slices revealed that brief and well timed postinhibitory rebound spiking, generated by the interaction of two subthreshold-activated ion currents, is a hallmark of SPON neurons. The I(h) current determines the timing of the rebound, whereas the T-type Ca(2+) current boosts the rebound to spike threshold. This precisely timed rebound spiking provides a physiological explanation for the sensitivity of SPON neurons to sinusoidally amplitude-modulated (SAM) tones in vivo, where peaks in the sound envelope drive inhibitory inputs and SPON neurons fire action potentials during the waveform troughs. Consistent with this notion, SPON neurons display intrinsic tuning to frequency-modulated sinusoidal currents (1-15Hz) in vitro and discharge with strong synchrony to SAMs with modulation frequencies between 1 and 20 Hz in vivo. The results of this study suggest that the SPON is particularly well suited to encode rhythmic sound patterns. Such temporal periodicity information is likely important for detection of communication cues, such as the acoustic envelopes of animal vocalizations and speech signals.
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| 7. |
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| 8. |
- Rossant, C, et al.
(författare)
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Sensitivity of noisy neurons to coincident inputs
- 2011
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Ingår i: The Journal of neuroscience : the official journal of the Society for Neuroscience. - 1529-2401. ; 31:47, s. 17193-17206
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Tidskriftsartikel (refereegranskat)
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