The Ordovician system in the Xainza region, north Tibet

Lithostratigraphy, biostratigraphy of the Ordovician Xainza area, northern division and correlation divided of approximates of the early as of Ordovician of Tetragraptus (Paratetragraptus)-Didymograptus (Corymbograptus) deflexus combination of Middle Ordovician Michelinoceras elongatum- combination with Sinoceras chinese and the Late Ordovician Michelinoceras huangnigang-Columenoceras priscum combination band. Early Ordovician strata author from 2000 to 2001 making Xainza County Sheet 1:250000 regional geological survey newly discovered, is the oldest strata of reliable fossils based in northern Tibet. Especially Tetragraptus (Paratetragraptus) approximatus discovery, not only to expand the distribution of it in our geographic area Early Ordovician strata the similar stratigraphic correlation international biological basis.

The paper deals with the classification and correlation of lithostratigraphy and biostratigraphy of the Ordovician System in the Xainza region, North Tibet. Based on fossils, the Ordovician System is divided into several biozones as follows: Tetragraptus (Paratetragraptus) approximatus Didymograptus (Corymbograptus) deflexus graptolite assemblage of Early Ordovician, The sediments of Early Ordovician is discovered recently by authors during 2000~2001 when making the geological surveying 1:250000 scale of Xainza county, Which has been the oldest stratum based on fossils up to now in northern Tibet. What is more, the discovery of Tetragraptus (Paratetragraptus) approximatus enlarges its geographical distribution in our nation as well as provides biology evidence to international correlation of the Ordovician in Xainza county.

The prolactin response to sulpiride in major depression: the role of the D2 receptor in depression.

Multiple lines of investigations have implicated the role of the dopaminergic system in depression. The aim of the study was to characterise the Dopamine D2 receptor sensitivity status in depressed patients versus controls by means of a novel neuro-endocrine challenge test, the prolactin response to sulpiride. In this intervention, ten patients and ten age matched male volunteers were studied. The patients were diagnosed according to DSM-IV criteria, and Montgomery Asberg and Zung scales were done. There was no significant difference in baseline levels of prolactin between the depressed and control groups. Significantly higher prolactin levels after sulpiride challenge were however found in depressed patients than controls at all time points after sulpiride administration. This neuroendocrine challenge paradigm suggests that the prolactin response to sulpiride, a D2 receptor antagonist, is enhanced in depression, which suggests that this receptor might be supersensitive in depression compared to controls. This adds to the data implicating the dopaminergic system in the pathophysiology of depression, and suggests that dopaminergic mechanisms might be a target of therapeutic interest.

Ethiopian-Australian students experience of secondary schooling in the Australian education system in the state of Victoria

This paper is aimed at investigating the secondary school experiences of Ethiopian (Ethio)-Australian students living in Melbourne. A qualitative methodology was employed using interviews and observations as data collection instruments. Secondary school students, their teachers and parents acted as participants of the study. The findings of the study included a deeper understanding of the exclusionary forces that contributed to the students' attendance and learning in the secondary schools when they relocated between schools and countries. Based on the data collected and the analysis made, appropriate recommendations were forwarded to teachers, parents, schools and policy makers.

Determinants of maternity leave duration in Australia : evidence from the HILDA survey

We use the first five waves of the Household, Income and Labour Dynamics in Australia survey to examine what determines the maternity leave taken by pre-birth employed mothers of newborn children in Australia. We find that the difficulties faced by mothers in finding appropriate child care in terms of both cost and quality hinder them from returning to the labour market following childbirth. Maternity leave entitlements lead to an earlier return to the labour market following the birth of a child, relative to those who have no leave rights at all. Mothers with higher wages in their pre-birth employment and mothers with higher education levels tend to return to the labour market earlier than their lower wage and less educated counterparts. More flexible pre-birth jobs are associated with an increase in the likelihood of mothers returning to the workforce earlier than the average. Household wealth, however, seems to play a facilitating role in mothers taking a longer period of maternity leave to look after the newborn child. That is, mothers who have higher wealth levels can ‘afford’ to stay on maternity leave longer, to look after their children better during their primary developmental months. We believe that this article provides useful insights into the employment transitions of Australian mothers after having a baby.

Achieving 'sustainability education' in primary schools as a result of the Victorian Science in Schools Research Project

The purpose of this paper is to discuss the experiences of primary schools involved in the Victorian Science in Schools Research Project which was concerned with improving science teaching and learning strategies but which also unexpectedly led to more environmental (sustainability) education occurring. The paper also suggests a curriculum strategy for achieving more widespread acceptance and implementation of 'sustainability education' through primary school science curricula.

The DALY, context and the determinants of the severity of disease: an exploratory comparison of paraplegia in Australia and Cameroon

This paper summarises the findings of an empirical investigation of some of the technical and social assumptions on which the disability adjusted life year (DALY) is based. The objectives of the study were to examine the notion that the burden of disease is broadly similar without regard to country, environment, gender or socio-economic status and to develop detailed descriptions of the experiences of the burden of disease as they related to these contextual factors. The study was a multi-factorial exploratory study employing qualitative and quantitative techniques to obtain data on the effects of country (development), environment (urban versus rural), gender and socio-economic status on people with paraplegia. The data provided an extensive and detailed compilation of context rich descriptions of living with paraplegia. Striking features of the data were the differences between countries with respect to the impact of the health conditions on functioning and highlight a context in which paraplegia of like clinical severity can be fatal in one environment and not in another. While there has been some focus on the control of social determinants of disease, there has been little work on the social determinants of the severity of disease. The underlying assumptions of the DALY, which ignore context in the assessment of the burden of disease, risk exacerbating inequalities by undervaluing the burden of disease in less-developed countries. There is a need to continue to subject the development of indicators to rigorous debate to determine a balance between the assumption of a global “average social milieu” and the treatment of each individual as belonging to their own context in the assessment of population health in order for indicators to be meaningful cross-culturally.

Investigating the determinants of the decision to engage in a corporate hedging strategy

This paper investigates the decision to engage in a comprehensive corporate hedging strategy for Australian listed companies. Specifically the pursuit of a comprehensive hedging strategy is gauged by jointly investigating the corporate use of foreign currency derivatives; interest rate derivatives; commodity derivatives and foreign debt. The results show that firm size, leverage, dividend yield and block holdings are incentive factors to the comprehensive hedging decision, while executive shares is a disincentive factor. Consistent with hedging theory, the significance of the leverage variables supports the financial distress cost hypothesis. Support is also found for the dividend decision is a substitute for corporate hedging.

Determinants of female fertility in Taiwan, 1966–2001 : empirical evidence from cointegration and variance decomposition analysis

This study investigates the determinants of the fertility rate in Taiwan over the period 1966–2001. Consistent with theory, the key explanatory variables in Taiwan's fertility model are real income, infant mortality rate, female education and female labor force participation rate. The test for cointegration is based on the recently developed bounds testing procedure while the long-run and short-run elasticities are based on the autoregressive distributed lag model. Among our key results, female education and female labor force participation rate are found to be the key determinants of fertility in Taiwan in the long run. The variance decom-position analysis indicates that in the long run approximately 45percent of the variation in fertility is explained by the combined impact of female labor force participation, mortality and income, implying that socioeconomic development played an important role in the fertility transition in Taiwan. This result is consistent with the traditional structural hypothesis.

Age-specific norms and determinants of anxiety and depression in 731 women with breast cancer recruited through a population-based cancer registry

The aim of this study was to determine population norms and determinants of anxiety and depression in a population-based sample of 731 women with breast cancer (aged 23–60 years) with the Hospital Anxiety and Depression scale (HADS). The prevalence of ‘probable’ psychological morbidity due to anxiety was 23% and due to depression was 3%. When the women identified as ‘possible’ cases were included, the respective proportions were 45 and 12%. Higher anxiety was present in younger, less educated women not born in Australia. There was no clear pattern of risk factors for depression. These population-based findings highlight the need for clinicians to be aware that age, education and country of birth may identify a particularly vulnerable subgroup. While brief scales such as the HADS are limited in their ability to accurately predict a clinical diagnosis, high scores identify those who may warrant referral for clinical evaluation.

Comparison of the levels of students' career maturity resulting from two models for the delivery of career education programs in selected Victorian government secondary schools

At both national and state levels, the delivery of career education has been recommended to follow an integrated model with a high level of staff participation across the school. However it has been found that in many schools the career education program is primarily delivered by a careers teacher. This study compared whether the recommended integrated model or the specialist careers teacher model delivered better outcomes for students in terms of their levels of career maturity. The main finding of the research is that the integrated model of delivery of career education programs did make a significant difference to the cognitive career maturity of the students in the selected Victorian governement secondary schools.

Intramuscular determinants of the VO₂ slow component in trained cyclists

Fifteen trained male cyclists had muscle biopsies and performed cycling tests to determine if relationships exist between the oxygen uptake response and various intramuscular variables. It was found that muscle oxidative capacity is better able to explain the oxygen uptake response during high intensity cycling than muscle fiber distribution.