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R Coronae Borealis (RCB) stars belong to a rare class of variable stars characterized by sudden and unpredictable declines, which are believed to be caused by dust cloud obscuration. In spite of the fact that these stars are so rare (only about 40 are known in our Galaxy), there are many reasons for investigating them. The unusual variability and peculiar chemical composition make them unique...

The theory of R-separation of variables is developed for the time-dependent Hamilton–Jacobi and Schrödinger equations on a Riemannian manifold V n where time-dependent vector and scalar potentials are permitted. As an application it is shown how to obtain all R-separable coordinates for the n-sphere and Euclidean n-space.Copyright 1987 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in the Journal of Mathematical Physics and may be found at http://jmp.aip.org/jmp/top.jsp [Journal Article]

Today's dynamic and competitive business environment puts an ever increasing pressure on companies to innovate, redesign processes, and leverage the potential of partnerships along the supply chain.One of the technologies offering a solution is Radio Frequency Identification (RFID). RFID can be used to automate and thus streamline identification processes,which means that more checkpoints...

In the nineteenth century, the savage was an instance of the primordial primitive, a living fossil signifying past imperfection healed by time in the emerging evolution. In the twentieth century, the savage was no longer even primitive. She was only data and evidence. In the twenty-first century, the savage Other is still an allegorical figure that represents what the civilised Self is not.... [Journal Article]

Three concepts have guided the conceptual orientation to studies of human groups within the social sciences. They are those concepts of race, culture, and ethnicity. These are discussed with specific reference to Maori peoples and their development in Te Aohurihuri. [Working or Discussion Paper]

The final, definitive version of this article has been published in the American University Journal of Gender, Social Policy & the Law, (c) 2002 American University Journal of Gender, Social Policy & the Law [Journal Article]

This paper proposes a method for generating classifiers from large datasets by building a committee of simple base classifiers using a standard boosting algorithm. It allows the processing of large datasets even if the underlying base learning algorithm cannot efficiently do so. The basic idea is to split incoming data into chunks and build a committee based on classifiers build from these... [Working or Discussion Paper]

In the early vertebrate embryo, the vascular system is one of the first organ systems to form. Recently it has become evident that the development of mature, functional vessels requires not only signals derived from the endothelium itself, but a set of additional molecules that are not necessarily endothelium-specific. In zebrafish and Xenopus embryos two such tissues that are believed to... [Thesis or Dissertation]

Electron beam therapy planning and custom electron bolus design were identified as areas in which improvements in equipment and techniques could lead to significant improvements in treatment delivery and patient outcomes. The electron pencil beam algorithms used in conventional Treatment Planning Systems do not accurately model the dose distribution in irregularly shaped objects, near...

The theory of radiative transfer is applied to the problem of multiple wave scattering in a one-dimensional multilayer. A new mathematical model of a multilayer is presented in which both the refractive index and width of each layer are randomized. The layer widths are generated by a new probability distribution which allows for strong layer width disorder. An expression for the transport mean... [Thesis or Dissertation]

While Radio Frequency Identification (RFID) was first conceived in 1948, it has taken many years for the technology to mature to the point where it is sufficiently affordable and reliable for widespread use. From Electronic Article Surveillance (EAS) for article (mainly clothing) security to more sophisticated uses, RFID is seen by some as the inevitable replacement for bar-codes. With... [Journal Article]

Whole document restricted at the request of the author, but available by individual request, use the feedback form to request access.The work reported in this thesis was part of a larger project to evaluate the use thermal plasma processing to synthesise ultrafine TiCx, TiNy, and TiCxNy powders from locally available TiO2, natural gas and NH3. The objectives for the work reported in this thesis were to develop and test the necessary experimental apparatus for a process for synthesis of the ultrafine ceramic powders, and then... [Thesis or Dissertation]

Two foraging trips of one female and one male Westland Petrel Procellaria westlandica partially tracked by radio telemetry, and six foraging trips by three male Westland Petrels tracked by satellite telemetry are reported. We report on the development of Platform Transmitting Terminals (PTTs) suitable for use on burrowing seabirds and on the successful deployment of the modified PTTs. The birds... [Journal Article]

Ragnar Nurkse_s contributions in the 1940s provide rules for international policy coordination complementing the contemporary position outlined by the Chicago economist Henry Simons. Nurkse_s scheme was significantly different from Bretton Woods. Interwar currency and inflation experience underscored the ineffectiveness of sterilized intervention when proceeding with inconsistent monetary and... [Working or Discussion Paper]

It is argued that the advent of railways in nineteenth century Great Britain mediated key ideas and ideals of the Enlightenment on the one hand; and ideas, experience, institutions and structures considered to be typically 'modern' on the other. From an interrogation of the concept of 'Enlightenment', the thesis attends to the structural significance of the advent of... [Thesis or Dissertation]

A cornerstone of early years teachers’ work is their ability to develop partnerships with diverse families which are beneficial to young children’s educational experiences. But just acknowledging that partnerships are important won’t magic them into existence; teachers and families together must work at creating education settings that invite participation, protect diversity and promote... [Conference Paper]

The Raman effect is the inelastic scattering of photons by matter. When a monochromatic light beam (pump beam) propagates in an optical fibre, spon- taneous Raman scattering transfers some of the photons to new frequencies. The probability of a photon scattering to a particular frequency shift, depends on that frequency shift, forming a characteristic spectrum. The scattered photons may lose... [Thesis or Dissertation]

A novel method for creating diverse ensembles of image classifiers is proposed. The idea is that, for each base image classifier in the ensemble, a random image transformation is generated and applied to all of the images in the labeled training set. The base classifiers are then learned using features extracted from these randomly transformed versions of the training data, and the result is a... [Conference Item]

The purpose of my research was to identify factors that have contributed to the development of resilience in young Māori girls’ lives. Incorporated into this was an exploration of their psychosocial competence makeup, to see whether their sense of self, sense of relationship to the world, and ability to negotiate life events, was unique. [Conference Item]

Whole document restricted at the request of the author, but available by individual request, use the feedback form to request access.This thesis examines rap music in Aotearoa, demonstrates its popularity, and explores its presence as a cultural commodity, particularly among Polynesian youth. I show how analysis of a popular musical phenomenon can be used to illustrate other social facts such as identity, political awareness, and alliance. American rap's history, musical characteristics, misogyny, profanity, racial... [Thesis or Dissertation]

Whole thesis restricted at the request of the author, no access available.This thesis is an intersection of inquiries from psychological, feminist, and postmodern perspectives, about the rape and sexual coercion of women within heterosexual relationships. Human sciences research and feminist literature on both sexual violence and "normal" heterosexuality is reviewed. It is suggested that rape exists on a continuum as an extension of normative coercive... [Thesis or Dissertation]

Ratio spreads in which one buys X calls (or puts) at one strike and sells Y calls (puts) at a different strike where YX are among the most actively traded option combinations yet are only briefly mentioned in most derivatives texts and have received no attention in the research literature. Moreover when ratio spreads are discussed in texts or the practitioner literature the proposed uses vary... [Conference Item]

In July 1980 the National Government selected a proposal by the Fletcher-Alusuisse-Gove consortium for the establishment of an aluminium smelter which would take up the last and greatest part of a 5000 Gigawatt-hour electricity concession. This decison provides a convenient end-point for a long and complicated period of energy planning where a major concern has been the utilisation of surplus...

Image based scene reconstruction from multiple views is an interesting challenge, with many ambiguities and sources of noise. One approach to scene reconstruction is Voxel Colouring, Seitz and Dyer [26], which uses colour information in images and handles the problem of occlusion. Culbertson and Malzbender [11], introduced Generalised Voxel Colouring (GVC) which uses projection and...

Image based volumetric reconstruction from multiple views is an interesting challenge. Recently several methods of optimisation–based voxel colouring have appeared, which make use of incremental visibility. Culbertson et al. presented a way of determining visibility incrementally by using layered depth images as a data structure (GVC-LDI). We present an alternative algorithm which provides... [Conference Paper]