Local and non-local equivalent potentials for p-12C scattering

A Newton-Sabatier fixed energy inversion scheme has been used to equate inherently non-local p-${}^{12}$C potentials at a variety of energies to pion threshold, with exactly phase equivalent local ones. Those energy dependent local potentials then have been recast in the form of non-local Frahn-Lemmer interactions.Comment: 15 pages plus 9 figures submitted to Phys. Rev.

Epstein-Barr virus antibodies in serum and DNA load in saliva are not associated with radiological or clinical disease activity in patients with early multiple sclerosis

OBJECTIVE: To investigate the association of Epstein-Barr virus (EBV) nuclear antigen-1 (EBNA-1) and viral capsid antigen (VCA) immunoglobulin (Ig)G antibodies in serum as well as EBV DNA load in saliva with radiological and clinical disease activity in patients with clinically isolated syndrome (CIS) and early relapsing-remitting MS (RRMS). METHODS: EBNA-1 and VCA immunoglobulin (Ig)G antibodies were determined in serum of 100 patients with CIS/early RRMS and 60 healthy controls. EBV DNA load was measured in saliva of 48 patients and 50 controls. Patients underwent clinical assessment with the Expanded Disability Status Scale (EDSS) and 3 Tesla magnetic resonance imaging at baseline and after a median of 20 months of follow-up (n = 63 for MRI, n = 71 for EDSS). The association of EBV parameters with occurrence of a second relapse, indicating conversion to clinically definite MS (CDMS), was evaluated over a median of 35 months of follow-up after the first clinical event (n = 89). RESULTS: BNA-1 IgG antibody frequency (p = 0.00005) and EBNA-1 and VCA IgG antibody levels (p<0.0001 for both) were higher in patients than in controls. EBV DNA load in saliva did not differ between groups. Neither EBV antibody levels nor DNA load in saliva were associated with baseline or follow-up number or volume of T2-weighted (T2w) or contrast enhancing lesions, number of Barkhof criteria or the EDSS, or with the number of new T2w lesions, T2w lesion volume change or EDSS change on follow-up. Likewise, levels of EBV IgG antibodies in serum and DNA load in saliva were not associated with conversion to CDMS. CONCLUSIONS: While these findings confirm the association of EBV infection with early MS, neither EBNA-1 nor VCA IgG antibodies in serum nor EBV DNA load in saliva were associated with radiological or clinical disease activity in patients with CIS/early RRMS. These data are compatible with the concept that EBV may be a trigger for MS acting very early during the development of the disease

Vergleich von Reifen-Luftschallmessungen und Schwingungsmessungen mit Hilfe von laseroptischen Verfahren

Reifenschwingungen werden als primäre Ursache für die Geräuschemission von Pkw-Reifen angesehen. Es werden drei im Labor erprobte laseroptische Meßverfahren vorgestellt, die für Schwingungsuntersuchungen an auf dem Trommelprüfstand laufenden Reifen geeignet sind: Doppelpuls-Holografie, Doppelpuls-Specklefotografie und Laser-Doppler-Vibrometrie (LDV). Die Doppelpuls-Holografie liefert im Zusammenwirken mit einem Bild-Derotator das Schwingungsmuster des rotierenden Reifens. Die LDV ermöglicht die Messung der Schwingschnelle eines reifenfesten Punktes bzw. an einem raumfesten Punkt der Reifenoberfläche. Mit Rüfe der LDV kann eine gute Korrelation zwischen Laufflächenschwingungen und Reifenabrollgeräusch nachgewiesen werden.Tire vibrations are considered to be the primary reason for tire noise. Three laser optical measuring methods are presented which are tested in laboratory and which enables vibration measurements of tires running on a drum test stand: Double-Pulse Holography, Double-Pulse Speckle Photography and Laser Doppler-Vibrometry. In co-operation with an image-derotator the Double-Pulse Holography yields the vibration pattern of the rotating tire. The Laser-Doppler Vibrometry (LDV) enables the measurement of the vibration velocity of one point of the tire (with derotator) or the vibration velocity at a stationary point (without derotator). With the aid of the LDV it is prooved that there is a good correlation between tread-vibrations and tire noise

Nonorthogonal pairs of copropagating optical modes in deformed microdisk cavities

Recently, it has been shown that spiral-shaped microdisk cavities support highly nonorthogonal pairs of copropagating modes with a preferred sense of rotation (spatial chirality) [ J. Wiersig et al. Phys. Rev. A 78 053809 (2008)]. Here, we provide numerical evidence which indicates that such pairs are a common feature of deformed microdisk cavities which lack mirror symmetries. In particular, we demonstrate that discontinuities of the cavity boundary such as the notch in the spiral cavity are not needed. We find a quantitative relation between the nonorthogonality and the chirality of the modes which agrees well with the predictions from an effective non-Hermitian Hamiltonian. A comparison to ray-tracing simulations is given