Classical calculation of relativistic frequency-shifts in an ideal Penning trap

The ideal Penning trap consists of a uniform magnetic field and an electrostatic quadrupole potential. In the classical low-energy limit, the three characteristic eigenfrequencies of a charged particle trapped in this configuration do not depend on the amplitudes of the three eigenmotions. No matter how accurate the experimental realization of the ideal Penning trap, its harmonicity is ultimately compromised by special relativity. Using a classical formalism of first-order perturbation theory, we calculate the relativistic frequency-shifts associated with the motional degrees of freedom for a spinless particle stored in an ideal Penning trap, and we compare the results with the simple but surprisingly accurate model of relativistic mass-increase.Comment: 8 pages, 0 figures, 1 table; Accepted manuscript subsequently published with a slightly extended description of the perturbative metho

Perspektiven der betrieblichen Altersvorsorge: Endbericht ; Studie im Auftrag der Wirtschaftskammer Wien

aus dem Inhaltsverzeichnis: Executive Summary; Einleitung; Abschätzung der zukünftigen Bedeutung der betrieblichen Altersvorsorge; Möglichkeiten der Erweiterung der Anspruchsberechtigten für eine betriebliche Altersvorsorge; Steuerliche Behandlung der betrieblichen Altersvorsorge; Erfolgsbeteiligung von Arbeitnehmern als Instrument der betrieblichen Altersvorsorge; Zusammenfassung; Literaturverzeichnis; Tabellenverzeichnis; Abbildungsverzeichnis

Mittelfristige Prognose der österreichischen Wirtschaft 2009-2013: Jahresmodell LIMA/05 ; Ökonometrisches Forschungsprogramm des Instituts für Höhere Studien

aus dem Inhaltsverzeichnis: Einleitung und Zusammenfassung; Die internationale Konjunktur; Die österreichische Außenwirtschaft; Perspektiven der Inlandskonjunktur; Monetäre Prognose; Tabellenanhang

A note on some asymptotic properties of the logarithmic series distribution

SUMMARYFormulae are given to calculate S(x, R) = ∞Σr−R+1 x7/r9 the remainder term in the logarithmic series, which are valid for high values of R and values of x close to unity. These are of value when dealing with extreme values of the parameters appearing in the logarithmic series distribution such as have arisen in C. B. William's recent study of the possible distribution of the number per species for all the insects in the world. Bounds are given for the errors involved when making the recommended approximations. The calculation of the median of the distribution is also discussed

Prognose der österreichischen Wirtschaft 2010-2012: Jahresmodell LIMA/05 ; Ökonometrisches Forschungsprogramm des Instituts für Höhere Studien

aus dem Inhaltsverzeichnis: Einleitung und Zusammenfassung; Die internationale Konjunktur; Die österreichische Außenwirtschaft; Perspektiven der Inlandskonjunktur; Monetäre Prognose; Tabellenanhang

Prognose der österreichischen Wirtschaft 2008-2009: Jahresmodell LIMA/05 ; Ökonometrisches Forschungsprogramm des Instituts für Höhere Studien

aus dem Inhaltsverzeichnis: Einleitung und Zusammenfassung; Die internationale Konjunktur; Die österreichische Außenwirtschaft; Perspektiven der Inlandskonjunktur; Monetäre Prognose; Tabellenanhang

Prognose der österreichischen Wirtschaft 2009-2010: Jahresmodell LIMA/05 ; Ökonometrisches Forschungsprogramm des Instituts für Höhere Studien

aus dem Inhaltsverzeichnis: Einleitung und Zusammenfassung; Die internationale Konjunktur; Die österreichische Außenwirtschaft; Perspektiven der Inlandskonjunktur; Monetäre Prognose; Tabellenanhang

Differential Cell Sensitivity between OTA and LPS upon Releasing TNF-α

The release of tumor necrosis factor α (TNF-α) by ochratoxin A (OTA) was studied in various macrophage and non-macrophage cell lines and compared with E. coli lipopolysaccharide (LPS) as a standard TNF-α release agent. Cells were exposed either to 0, 2.5 or 12.5 µmol/L OTA, or to 0.1 µg/mL LPS, for up to 24 h. OTA at 2.5 µmol/L and LPS at 0.1 µg/mL were not toxic to the tested cells as indicated by viability markers. TNF-α was detected in the incubated cell medium of rat Kupffer cells, peritoneal rat macrophages, and the mouse monocyte macrophage cell line J774A.1: TNF-α concentrations were 1,000 pg/mL, 1,560 pg/mL, and 650 pg/mL, respectively, for 2.5 µmol/L OTA exposure and 3,000 pg/mL, 2,600 pg/mL, and 2,115 pg/mL, respectively, for LPS exposure. Rat liver sinusoidal endothelial cells, rat hepatocytes, human HepG2 cells, and mouse L929 cells lacked any cytokine response to OTA, but showed a significant release of TNF-α after LPS exposure, with the exception of HepG2 cells. In non-responsive cell lines, OTA lacked both any activation of NF-κB or the translocation of activated NF-κB to the cell nucleus, i.e., in mouse L929 cells. In J774A.1 cells, OTA mediated TNF-α release via the pRaf/MEK 1/2-NF-κB and p38-NF-κB pathways, whereas LPS used pRaf/MEK 1/2–NF-κB, but not p38-NF-κB pathways. In contrast, in L929 cells, LPS used other pathways to activate NF-κB. Our data indicate that only macrophages and macrophage derived cells respond to OTA and are considered as sources for TNF-α release upon OTA exposure