M wie Mitte

Article for general public (2012)

M-QAM Modulation Symbol-Level Precoding for Power Minimization: Closed-Form Solution

Scientific Conference (2019, August)

In this paper, we derive a closed-form algorithm of the computationally efficient Symbol-Level Precoding (SLP) for power efficient communications when using M-QAM modulated waveforms. The channel state ... [more ▼]

In this paper, we derive a closed-form algorithm of the computationally efficient Symbol-Level Precoding (SLP) for power efficient communications when using M-QAM modulated waveforms. The channel state information (CSI) based and data-aided SLP technique optimizes power efficiency by solving a non-negative convex quadratic optimization problem per time frame of transmitted symbols. The optimization combines constructive inter-user interference to minimize the sum power of precoded symbols at the transmitter side under constraints for minimum SNR at the receiver side. The SLP implementation incurs extra computational complexity of the transmitter. We propose a convex quadratic optimization problem for M-QAM constellations and derive a closed-form algorithm with a fixed number of iterations to solve the problem. [less ▲]

The M2 muscarinic receptor antagonist methoctramine activates mast cells via pertussis toxin-sensitive G proteins

in Naunyn-Schmiedeberg's Archives of Pharmacology (1998), 357(4), 357-62

Methoctramine, a selective M2 muscarinic cholinergic receptor antagonist, has been reported to activate phosphoinositide breakdown at high concentrations. Its polyamine structure suggests a putative ... [more ▼]

Methoctramine, a selective M2 muscarinic cholinergic receptor antagonist, has been reported to activate phosphoinositide breakdown at high concentrations. Its polyamine structure suggests a putative activation of guanine nucleotide-binding proteins (G proteins). Incubation of methoctramine with rat peritoneal mast cells resulted in a dose-dependent noncytotoxic histamine release, with an EC50 of 20 microM and a maximum effect at 1 mM. Atropine, pirenzepine and HHSiD neither inhibited methoctramine-induced histamine release nor stimulated histamine release. Histamine release and inositol phosphates generation induced by methoctramine were both inhibited by pertussis toxin pretreatment. Benzalkonium chloride, a selective inhibitor of histamine secretion induced by basic secretagogues, inhibited the secretory response to methoctramine. [p-Glu5, D-Trp7,9,l0]-SPs5-11 (GPAnt-2), a well-characterized antagonist of G proteins, blocked the methoctramine-induced histamine release when the antagonist was allowed to reach its intracellular target by streptolysin O-permeabilization. The response to methoctramine was prevented by the hydrolysis of sialic acid residues of the cell surface by neuraminidase. The response of mast cells was restored by permeabilization of the plasma membrane. These results demonstrate that methoctramine, following its entry into the cell and the involvement of pertussis toxin-sensitive G proteins, activates phosphoinositide hydrolysis leading to mast cell exocytosis. [less ▲]

M2 World Ocean Tides from Tide Gauge and Gravity Loading Measurements

in Paquet, Paul; Flick, Johnny; Ducarme, Bernard (Eds.) GPS for Geodesy and (1990)

"[M]a défense, c’est mon éclat". Conjurer l’oubli face à la mort ? Figurations de l'oubli comme mort symbolique dans la correspondance staëlienne

in Travaux et recherches de l'Institut Benjamin Constant (2021), 18

Cet article entend examiner au départ de la correspondance de Germaine de Staël, ainsi que de Dix années d'exil, toutes les occurrences de cette peur de l'oubli qui la touche dès qu'est ordonné son exil à ... [more ▼]

Cet article entend examiner au départ de la correspondance de Germaine de Staël, ainsi que de Dix années d'exil, toutes les occurrences de cette peur de l'oubli qui la touche dès qu'est ordonné son exil à quarante lieues de Paris. L'écrivaine clôt en effet nombre de ses lettres en demandant à ses correspondants de ne pas l'oublier, et évoque à de nombreuses reprises sa peur de ne plus être remémorée (de ses amis comme de l'opinion) si elle en venait à ne plus lutter publiquement contre la mesure d'exil qui la frappe. En ce sens, conjurer l'oubli revient chez elle à conjurer la mort symbolique qui serait la sienne dès lors qu'elle accepterait son sort d'exilée sans discussion ; le présent article envisage les modalités selon lesquelles se joue cette peur de l'oubli comme d'une mort symbolique. [less ▲]

“Ma misi me per l’alto mare aperto”

Scientific Conference (2017)

MAANA: An Automated Tool for DoMAin-specific HANdling of Ambiguity

in Companion Proceedings of the 43rd International Conference on Software Engineering (2021, May)

MAANA (in Arabic: “meaning”) is a tool for performing domain-specific handling of ambiguity in requirements. Given a requirements document as input, MAANA detects the requirements that are potentially ... [more ▼]

MAANA (in Arabic: “meaning”) is a tool for performing domain-specific handling of ambiguity in requirements. Given a requirements document as input, MAANA detects the requirements that are potentially ambiguous. The focus of MAANA is on coordination ambiguity and prepositional-phrase attachment ambiguity; these are two common ambiguity types that have been studied in the requirements engineering literature. To detect ambiguity, MAANA utilizes structural patterns and a set of heuristics derived from a domain-specific corpus. The generated analysis file after running the tool can be reviewed by requirements analysts. Through combining different knowledge sources, MAANA highlights also the requirements that might contain unacknowledged ambiguity. That is when the analysts understand different interpretations for the same requirement, without explicitly discussing it with the other analysts due to time constraints. This artifact paper presents the details of MAANA. MAANA is associated with the ICSE 2021 technical paper titled “Using Domain-specific Corpora for Improved Handling of Ambiguity in Requirements”. The tool is publicly available on GitHub and Zenodo. [less ▲]

Mabuchi and Aubin-Yau functionals over complex manifolds

E-print/Working paper (2010)

Mabuchi and Aubin-Yau functionals over complex three-folds

E-print/Working paper (2010)

Machbarkeitsstudie "Betreuungsatlas Schweiz": Die Geographie betreuter Kindheit

Report (2015)