Australia's Prosperous 2000s: Housing and the Mining Boom

The 2000s was a particularly eventful decade for both the international and Australian economies. There were: two recessions in many countries; the largest international financial crisis since the Great Depression; the ongoing rapid development of Asia; asset booms and busts; and, Australia experienced the longest sustained increase in commodity prices and the terms of trade in the nation's history. This paper provides an overview of the Australian economy's performance in the decade. Several key topics are elaborated on, including the development of Asia and implications for Australia, policy frameworks, and the opportunities and challenges facing the Australian economy, with a particular focus on the expansion of household balance sheets and the rapid growth in the mining economy.Australian macroeconomy; economic performance; household balance sheets; terms of trade; monetary policy; fiscal policy

Recientes avances en metafísica: Categorías ontológicas y esquemas categoriales

[ES] Desde una perspectiva ontológica tradicional, y con la declarada intención de alejarse del relativismo contemporáneo, el presente escrito busca establecer algunos principios básicos para mantener la posición de la metafísica como el estudio sistemático de la realidad como un todo, y de la ontología como la ciencia del ser, sustentada en una teoría de categorías. Estas categorías están diferenciadas por las características distintivas de existencia e identidad de sus respectivos miembros, tomándose como «categorías ontológicas fundamentales» aquellas en donde sus miembros tienen condiciones para estas características de existencia e identidad que no sean especificables en una forma exhaustiva, en términos de dependencia ontológica, entre esos miembros y los miembros de otras categorías ontológicas. Este escrito hace entonces una revisión de las diferentes teorías de categorías ontológicas, y sus respectivas interpretaciones de cuántas y cuáles categorías deben ser reconocidas. [EN] From a traditional ontological perspective, and with the declared intention to move away from contemporary relativism, this paper aims to establish some basic principles to maintain the position of Metaphysics as the systematic study of reality as a whole, and Ontology as the science of being, based on a theory of categories. These categories are differentiated by the distinctive features of existence and identity of their respective members, taking as «fundamental ontological categories» those where its members have conditions for these characteristics of existence and identity that are not exhaustively specifiable, in terms of ontological dependence, between those members and members of other ontological categories. This paper then makes a revision of the different theories of ontological categories, and their respective interpretations of how many and which categories should be recognized

Including people with learning difficulties in cultural and heritage sites

This paper examines the processes involved in a participatory inclusive research project in Liverpool and Merseyside, UK. The project involved 25 people with learning difficulties - the Heritage Forum - visiting 13 cultural and heritage sites on more than 50 occasions across a 15-month period. The research provides a much needed resource at a time when there is a lack of provision for, and research into, the intellectual accessibility of cultural and heritage sites in the UK and globally. This paper details the research approach taken by the Heritage Forum, providing a flexible protocol about ways of working with groups and individuals with learning difficulties. It also reports on the Heritage Forum's general findings about the cultural and heritage sites, providing some initial guidance about how to best include this diverse population

Death by the pounds: The effects of television on the obesity of African-American children and adolescents

Abstract only availableThis study examined the direct effects that television programming has on the obesity of African-American children and adolescents based upon the top three stations viewed by African-American children and adolescents during prime time viewing hours. A self-concept theory was implemented to determine whether or not the content of television programs helped develop a child or teenagers concept of obesity. While it has not been possible to provide definite answers to our research questions, we project that the results will be that majority of children and adolescents who view a significantly amount of television a day will indeed have a distorted view of the realities of obesity and its causes. Future studies will explore the same self-concept theory of the African-American children and teenagers on obesity using advertisements as the medium. Also I will explore the usage and depiction of African-American endorsers in health food ads in popular African-American periodicals.Summer Pre-Graduate Research Experience for Students in the Humanitie

Promoting Liquidity: Why and How?

As recent experience all too clearly demonstrates, liquid markets do not exist for all financial assets at all times. In some respects, this can be thought of as a market failure. This paper addresses how best to promote asset market liquidity given this market failure, and the appropriate balance between the private and public sectors in establishing arrangements for dealing with liquidity problems. There are three main conclusions. First, improvements in the financial infrastructure – including arrangements for disclosure and post-trade processing – have a role to play in limiting the sharp rise in information asymmetries that can occur when conditions in financial markets are strained and at turning points in the financial cycle. Second, recent events have shown up shortcomings in the way that financial institutions manage their own liquidity, and these shortcomings need addressing. Third, it may be welfare-improving for the public sector to provide liquidity services when liquidity is strained. The central bank can smooth liquidity over the cycle, and the public sector can facilitate the change of ownership of assets from a troubled institution, which in extremis may include the public sector buying assets outright. If the public sector does actively provide liquidity services, then arrangements need to be put in place to ensure that the potential welfare gains from doing so are not undermined by financial institutions taking on greater risk than is warranted.asset market liquidity; central bank market operations; lender of last resort

Revised calendar date for the Taupo eruption derived by ¹⁴C wiggle-matching using a New Zealand kauri ¹⁴C calibration data set

Taupo volcano in central North Island, New Zealand, is the most frequently active and productive rhyolite volcano on Earth. Its latest explosive activity about 1800 years ago generated the spectacular Taupo eruption, the most violent eruption known in the world in the last 5000 years. We present here a new accurate and precise eruption date of AD 232 ± 5 (1718 ± 5 cal. BP) for the Taupo event. This date was derived by wiggle-matching 25 high-precision ¹⁴C dates from decadal samples of Phyllocladus trichomanoides from the Pureora buried forest near Lake Taupo against the high-precision, first-millennium AD subfossil Agathis australis (kauri) calibration data set constructed by the Waikato Radiocarbon Laboratory. It shows that postulated dates for the eruption estimated previously from Greenland ice-core records (AD 181 ± 2) and putative historical records of unusual atmospheric phenomena in ancient Rome and China (c. AD 186) are both untenable. However, although their conclusion of a zero north–south ¹⁴C offset is erroneous, and their data exhibit a laboratory bias of about 38 years (too young), Sparks et al. (Sparks RJ, Melhuish WH, McKee JWA, Ogden J, Palmer JG and Molloy BPJ (1995) ¹⁴C calibration in the Southern Hemisphere and the date of the last Taupo eruption: Evidence from tree-ring sequences. Radiocarbon 37: 155–163) correctly utilized the Northern Hemisphere calibration curve of Stuiver and Becker (Stuiver M and Becker B (1993) High-precision decadal calibration of the radiocarbon timescale, AD 1950–6000 BC. Radiocarbon 35: 35–65) to obtain an accurate wiggle-match date for the eruption identical to ours but less precise (AD 232 ± 15). Our results demonstrate that high-agreement levels, indicated by either agreement indices or χ² data, obtained from a ¹⁴C wiggle-match do not necessarily mean that age models are accurate. We also show that laboratory bias, if suspected, can be mitigated by applying the reservoir offset function with an appropriate error value (e.g. 0 ± 40 years). Ages for eruptives such as Taupo tephra that are based upon individual ¹⁴C dates should be considered as approximate only, and confined ideally to short-lived material (e.g. seeds, leaves, small branches or the outer rings of larger trees)

New Analysis Indicates No Thermal Inversion in the Atmosphere of HD 209458b

An important focus of exoplanet research is the determination of the atmospheric temperature structure of strongly irradiated gas giant planets, or hot Jupiters. HD 209458b is the prototypical exoplanet for atmospheric thermal inversions, but this assertion does not take into account recently obtained data or newer data reduction techniques. We re-examine this claim by investigating all publicly available Spitzer Space Telescope secondary-eclipse photometric data of HD 209458b and performing a self-consistent analysis. We employ data reduction techniques that minimize stellar centroid variations, apply sophisticated models to known Spitzer systematics, and account for time-correlated noise in the data. We derive new secondary-eclipse depths of 0.119 +/- 0.007%, 0.123 +/- 0.006%, 0.134 +/- 0.035%, and 0.215 +/- 0.008% in the 3.6, 4.5, 5.8, and 8.0 micron bandpasses, respectively. We feed these results into a Bayesian atmospheric retrieval analysis and determine that it is unnecessary to invoke a thermal inversion to explain our secondary-eclipse depths. The data are well-fitted by a temperature model that decreases monotonically between pressure levels of 1 and 0.01 bars. We conclude that there is no evidence for a thermal inversion in the atmosphere of HD 209458b.Comment: 8 pages, 5 figures; accepted for publication in Ap

Orbit Determination for the Lunar Reconnaissance Orbiter Using an Extended Kalman Filter

Orbit determination (OD) analysis results are presented for the Lunar Reconnaissance Orbiter (LRO) using a commercially available Extended Kalman Filter, Analytical Graphics' Orbit Determination Tool Kit (ODTK). Process noise models for lunar gravity and solar radiation pressure (SRP) are described and OD results employing the models are presented. Definitive accuracy using ODTK meets mission requirements and is better than that achieved using the operational LRO OD tool, the Goddard Trajectory Determination System (GTDS). Results demonstrate that a Vasicek stochastic model produces better estimates of the coefficient of solar radiation pressure than a Gauss-Markov model, and prediction accuracy using a Vasicek model meets mission requirements over the analysis span. Modeling the effect of antenna motion on range-rate tracking considerably improves residuals and filter-smoother consistency. Inclusion of off-axis SRP process noise and generalized process noise improves filter performance for both definitive and predicted accuracy. Definitive accuracy from the smoother is better than achieved using GTDS and is close to that achieved by precision OD methods used to generate definitive science orbits. Use of a multi-plate dynamic spacecraft area model with ODTK's force model plugin capability provides additional improvements in predicted accuracy

Mapping and explaining the productivity of Pinus radiata in New Zealand

Mapping Pinus radiata productivity for New Zealand not only provides useful information for forest owners, industry stakeholders and policy managers, but also enables current and future plantations to be visualised, quantified, and planned. Using an extensive set of permanent sample plots, split into fitting (n = 1,146) and validation (n = 618) datasets, models of P. radiata 300 Index (an index of volume mean annual increment) and Site Index (an index of height growth) were developed using a regression kriging technique. Spatial predictions were accurate and accounted for 61% and 70% of the variance for 300 Index and Site Index, respectively. Productivity predicted from these surfaces for the entire plantation estate averaged 27.4 m³ ha⁻¹ yr⁻¹ for the 300 Index and 30.4 m for Site Index. Surfaces showed wide regional variation in this productivity, which was attributable mainly to variation in air temperature and root-zone water storage from site to site