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Search Results: 1 - 10 of 53037 matches for " David Kammler "
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Characterization of Periodic Eigenfunctions of the Fourier Transform Operator  [PDF]
Comlan de Souza, David W. Kammler
American Journal of Computational Mathematics (AJCM) , 2013, DOI: 10.4236/ajcm.2013.34040
Abstract: We generalize this result to p1,p2-periodic eigenfunctions of F on R2 and to p1,p2,p3-periodic eigenfunctions of F on R3.

Characterization of Self Dual Lattices in R, R2 and R3  [PDF]
Comlan de Souza, David W. Kammler
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.510137

This paper shows that the only self dual lattices in R, R2, R3  are rotations of Z , Z×Z and Z×Z×Z.

Power-efficient Instruction Encoding Optimization for Various Architecture Classes
Diandian Zhang,Anupam Chattopadhyay,David Kammler,Ernst Martin Witte
Journal of Computers , 2008, DOI: 10.4304/jcp.3.3.25-38
Abstract: A huge application domain, in particular, wireless and handheld devices strongly requires flexible and power-efficient hardware with high performance. This can only be achieved with Application Specific Instruction-Set Processors (ASIPs). A key problem is to determine the instruction encoding of the processors for achieving minimum power consumption in the instruction bus and in the instruction memory. In this paper, a framework for determining power-efficient instruction encoding in RISC and VLIW architectures is presented. We have integrated existing and novel techniques in this framework and propose novel heuristic approaches. The framework accepts an existing processor’s instruction-set and a set of implementations of various applications. The output, which is an optimized instruction encoding under the constraint of a well-defined cost model, minimizes the power consumption of the instruction bus and the instruction memory. This results in strong reduction of the overall power consumption. Case studies with commercial embedded processors show the effectiveness of this framework.
EKG-Beispiel: Transmurale Isch mie mit Erstickungs-T-Wellen
Kammler J
Journal für Kardiologie , 2008,
EKG-Beispiel: Koronarisch mie im Versorgungsgebiet der Arteria circumflexa
Kammler J
Journal für Kardiologie , 2006,
EKG-Beispiel: Sinustachykardie mit inkomplettem Rechtsschenkelblock und ST-Streckenver nderungen
Kammler J
Journal für Kardiologie , 2005,
EKG-Beispiel: Sinusbradykardie nach Adenosingabe
Kammler J
Journal für Kardiologie , 2007,
EKG-Beispiel: Kammerflimmern mit regelm igen QRS-Komplexen
Kammler J
Journal für Kardiologie , 2004,
Efficient And Portable SDR Waveform Development: The Nucleus Concept
Venkatesh Ramakrishnan,Ernst M. Witte,Torsten Kempf,David Kammler,Gerd Ascheid,Heinrich Meyr,Marc Adrat,Markus Antweiler
Mathematics , 2009, DOI: 10.1109/MILCOM.2009.5379897
Abstract: Future wireless communication systems should be flexible to support different waveforms (WFs) and be cognitive to sense the environment and tune themselves. This has lead to tremendous interest in software defined radios (SDRs). Constraints like throughput, latency and low energy demand high implementation efficiency. The tradeoff of going for a highly efficient implementation is the increase of porting effort to a new hardware (HW) platform. In this paper, we propose a novel concept for WF development, the Nucleus concept, that exploits the common structure in various wireless signal processing algorithms and provides a way for efficient and portable implementation. Tool assisted WF mapping and exploration is done efficiently by propagating the implementation and interface properties of Nuclei. The Nucleus concept aims at providing software flexibility with high level programmability, but at the same time limiting HW flexibility to maximize area and energy efficiency.
EKG-Beispiel: "Anteroseptalinfarkt - alles klar, oder doch nicht?"
Kammler J,Lambert T
Journal für Kardiologie , 2010,
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