We construct unramified central simple algebras representing 2-torsion classes in the Brauer group of a hyperelliptic curve, and show that every 2-torsion class can be constructed this way when the curve has a rational Weierstrass point or when the base field is C1. In general, we show that a large (but in general proper) subgroup of the 2torsion classes are given by the construction. Examples ...

A basic and inevitable problem in estimating flow duration distribution arises from “censoring” (i.e., cutting off) the observed flow duration because of a finite measurement period. We extended the KaplanMeier method, which is used in the survival analysis field, and applied it to recover information on the flow duration distribution that was lost due to censoring. We show that the flow durati...

Kaplan, R. and Talbot, J.F., 1988. Ethnicity and preference for natural settings: a review and recent.findings. Landscape Urban Plann., IS. 107-117. Substantial differences have been found between the recreational pursuits of blacks and w1hite.s. In the related area sf environmental preference, however, agreement generally exists across many cultural groups. None the less, the existence of some...

A compact graphical device for combining survival and time-varying covariate information is proposed. The proposed graph contains the Kaplan-Meier estimator for right-censored data and a simultaneous display of the behaviour of time-dependent covariate(s) and the lifetime for each subject in the sample. The observed levels of time-dependent covariates are possibly subjected to an initial dimens...

We present a composite model of quarks with the ‘effective supersymmetry’. The model is based on the gauge group (SU(2)S × SU(2)M) × (SU(2)U × SU(2)C × SU(2)T )× SU(5)SM , where SU(5)SM is the standard model gauge group. In the dynamical supersymmetry breaking sector based on the gauge group SU(2)S × SU(2)M , the supersymmetry is dynamically broken. The preon sector is constructed by the model ...

Die Balanced Scorecard ist ein Planungsund Steuerungsinstrument, das in den 1990er Jahren von Kaplan und Norton in den USA entwickelt wurde. Dieses Managementkonzept sollte dazu beitragen, die Unzulänglichkeiten klassischer – vornehmlich finanzbuchführungsbasierter – Kennzahlensysteme zu beseitigen, indem eine umsetzungsorientierte Steuerung bei Bezugnahme auf die formulierten Ziele des Unterne...

H.-P. Huang, Lamont-Doherty Earth Observatory of Columbia University, 61 Route 9W, Palisades, NY 10964, USA. ([email protected]) A. Kaplan, Lamont-Doherty Earth Observatory of Columbia University, 61 Route 9W, Palisades, NY 10964, USA. ([email protected]) E. N. Curchitser, Institute of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ 08901, USA. ([email protected]...