The increasing demand for up-to-date 3-D geographic information systems (GIS) data for planning, transportation, and utility management applications poses significant challenges to the Geomatics community. Of all the challenges in acquiring, building, maintaining, and using GIS, none is more central than that of data acquisition. Obtaining the required spatial and attribute data by conventional...

Centre of mass is a fundamental anatomical and biomechanical parameter. Knowledge of centre of mass is essential to inform studies investigating locomotion and other behaviours, through its implications for segment movements, and on whole body factors such as posture. Previous studies have estimated centre of mass position for a range of organisms, using various methodologies. However, few stud...

The crystal structure of the title compound, C(12)H(21)NO, has been investigated to establish the absolute stereochemistry at position 1. The absolute stereochemistry at the quaternary centre at position 6 is established to be R using an asymmetric Birch reductive alkyl-ation reaction for which the stereochemical outcome is known. The crystal structure indicates the presence of two conformers o...

The asymmetric unit of the title compound, C(21)H(20)N(4)O(3)S, contains two independent mol-ecules. The dihedral angles between the two benzene rings are 47.6 (1) and 30.2 (1)°, the corresponding values between the p-methoxy-benzene and thia-diazol rings are 12.3 (1) and 24.7 (1)°, respectively, for the two mol-ecules. The conformations of the N-H and C=O bonds are anti with respect to each ot...

Cycloelatanene A and B are marine natural products first reported a few years ago. Their relative structures had been elucidated by an extensive NMR study and found to be epimers. However, their absolute configurations had not been established because they were isolated in only minute quantities as oily compounds. In this study, the complete structures of cycloelatanene A and B, including absol...

We use asymptotic analysis to derive the optimal hedging strategy for an option portfolio hedged using an imperfectly correlated hedging asset with small transaction costs, both fixed per trade and proportional to the value traded. In special cases we opbtain explicit formulae. The hedging strategy involves holding a position in the hedging asset whose value lies between two bounds, which are i...

The beam energy at the ILC is needed to a precision of around 10−4 for accurate mass determinations of the top quark, the Higgs boson and in supersymmetry [1]. This measurement will mainly be done with a magnetic spectrometer [2]. However the absolute calibration of such a spectrometer is difficult and in addition the luminosity weighted centre of mass energy is not necessarily identical to twi...

We propose an illumination strategy for interferometric imaging that allows for robust depth recovery from intensity-only measurements. For an array with colocated sources and receivers, we show that all the possible interferometric data for multiple sources, receivers and frequencies can be recovered from intensity-only measurements provided that we have sufficient source location and frequenc...