Phytogeography of northeastern Tasmania with a focus on bryophytes

Analysis of the distribution and ecology of bryophytes in the Flinders bioregion of Tasmania revealed a significant association between bryophyte composition and vegetation type. Variables important for predicting bryophyte richness and presence were identified at two spatial scales. A new census for Flinders Island comprises 223 species of which 21 are new records.

More? You want more?..of course I do! Transsexualism and birth certificates-changing records or attitudes?

In 2004, the Victorian Government enacted legislation allowing people treated for transsexualism to correct the record of their sex on the Register of Births, Deaths and Marriages and obtain a new certificate reflecting their contemporaneous circumstances. It was the last of all the States and Territories to do so.

The legislation gave effect to some important changes to the law and was generally couched in terms more sensitive than those already in place in the other jurisdictions. In the view of the author, however, its proponents failed to both understand the import of the expert medical evidence adduced in, and to implement the common law position enunciated by, the Family Court in Re Kevin (validity of marriage of transsexual) [2001] FamCA 1074 and subsequently confirmed on appeal two years later by the Full Court.

The author argues that, while a welcome improvement to the human rights record of successive Victorian Governments, the result is still a largely disappointing piece of legislation. Rather than being truly 'beneficial' to all who need security of their personal identities, it perpetuates some of the very worst discrimination directed at people with transsexualism and their families by continuing to portray them as psychologically deluded rather than physiologically atypical and denying a small number of them their rights on the basis of legal reasoning which is no longer regarded as tenable. She asserts the legislation serves as a clear demonstration that prejudices and misconceptions about transsexualism stilI abound and explains much more is needed if real human rights, acceptance and freedom from discrimination are to be eventually obtained by those affected by the phenomenon.

Calibration and reliability of a school food checklist: a new tool for assessing school food and beverage consumption

There is a pressing need in Australia and other countries to develop systems for monitoring secular trends in childhood obesity and related behavioural and environmental determinants. Energy from foods and beverages consumed at school is an accessible indicator of children’s eating patterns and we have developed a school food checklist (SFC) to measure this. The SFC records the number of serves and source (home, canteen, vending machine) of 20 food and beverage categories. This study aims to assess the accuracy and to calibrate the SFC by comparing it to a weighed record (WR) and to evaluate inter-recorder reliability. Participants were 910 primary school children aged 5 to 12 years from a rural township in Victoria, Australia. WR were collected from a nonrandom sub-sample of 106 and a second sub-sample (n=46) had intake measured twice using the SFC to assess inter-recorder reliability. Mean energy values were 2992 kJ ± 924 and 3008 kJ ± 952 for the SFC and WR respectively and the correlation coefficient was strong (Pearson r = 0.77). The mean difference between the WR and SFC methods was 15 kJ (95% CI, -107 kJ to 138 kJ) and the limits of agreement (+2 standard deviations) were ± 1270 kJ. The SFC overestimated the energy/serve of breads and fruit drinks and under-estimated energy/serve from fat spreads, biscuits/crackers, muesli/fruit bars and fruit. Inter-recorder reliability was good (kappa 0.51). The SFC was designed to measure energy from food and beverages in schools. It has good accuracy and reliability and the revised version should further improve accuracy of the instrument.

Description of new species of Setosabatieria and Desmolaimus (Nematoda: Monhysterida) and a checklist of New Zealand free-living marine nematode species

Two new marine nematode species are described from intertidal sediments in southern New Zealand. Setosabatieria australis sp. nov. is characterised by an amphideal fovea with 3.5 turns, 7–9 small pre-cloacal supplements, and 2–5 sub-cephalic setae per file. Setosabatieria australis sp. nov. differs from all known species of the genus in having L-shaped spicules with a hollow median region, in contrast to the typical curved shape. Desmolaimus courti sp. nov. is characterised by the presence of four long (15 µm) cephalic setae, two cuticularised rings in the buccal cavity, and a lightly cuticularised pharyngeal lumen. It differs from other species of the genus by having eight sub-cephalic setae. A total of 116 marine species are included in the checklist of New Zealand free-living nematodes, with the majority of records from the coast of Campbell and Auckland islands from the early part of the 20th century. Most records were from habitats such as seaweed or sponge, which may explain the high proportion (>50%) of cosmopolitan species recorded in New Zealand to date. Little is known about the sediment nematode fauna, particularly in deeper waters (>120 m), from where there are no records to date.

Social justice in education in 'new times'

This thesis considers social justice in education in ‘new times’. To facilitate the investigation a number of research questions were pursued. These questions were: • What is meant by the label ‘social justice’? • How is social justice to be understood in contemporary terms? • Are there tensions between traditional and contemporary views of social justice? • How effective are policy developments in delivering social justice via education? • What difference do such policies make at the local level? To answer these questions a critical case analysis of a country community and one of its primary schools was carried out. Data were gathered using a variety of methods. As a researcher who was also a teacher in the school I kept a personal professional journal during 1993 and 1994. During this period I was the teacher in the school with responsibility for curriculum development related to issues of social justice. In 1994 I conducted interviews with twenty students, parents and teachers at the school in relation to social justice issues. I also interviewed the CEO of the town’s Council. A number of relevant Federal and State Government and school policy documents were consulted and an archival search of the local newspaper from 1956 to 1994 was undertaken. Statistical information from the Australian Bureau of Statistics as well as from school records was used. A number of local history books were consulted as well as the minutes of relevant school committee meetings. Contemporary social theory, more specifically the work of Anthony Giddens, provided the major methodological tool. Giddens structuration theory was selected as it provided a way of interpreting society from both macro and micro perspectives, it provided a way of studying the interconnectedness of the individual and society. In addition to this, a metaphor was used as a way of developing an understanding of the data. The river was chosen as the metaphor as it has significance to the case study community and it also provides a way of understanding interconnectedness. At an interpretive level, both social theory and moral philosophy were drawn on, including the work of Geoffrey Sharp, Anthony Giddens and Alisdair MacIntyre. A review of selected literature indicated three main areas of concern in relation to this thesis. We live in a time of constant and ongoing change, understanding how this change impacts on the lives of individuals and society is important. Such an understanding relates directly to issues of ontology. In addition it was necessary to consider schools in these ‘new times’. The literature revealed that the changes occurring in the wider society were related to the changes currently being seen in schools. Specifically this related to the increasing emphasis on economics and on individualism, emphases also reflected in the findings of this thesis. Finally the literature related to social justice was discussed, the focus here was on distributive theories of justice and the way these are reflected in programs such as the DSP. The data, as expressed in the metaphor of the flowing river, revealed dominant and marginal currents in social justice in education in ‘new times’. The dominant social group are the intellectually trained and the dominant issues were related to technology, globalisation and economic and bureaucratic rationalism. In the marginal currents we find the under-employed and the unemployed and marginal issues relating to housing, the black economy, poverty and the survival of rural communities. The data also revealed a marginal tributary running into the river. This tributary shows that social cohesion is still a part of life in ‘new times’, albeit a marginalised part. The dominant and marginal currents in social justice in ‘new times’ reveal changes at a deep cultural level. Social justice in ‘new times’ is set within the limits provided by economic rationalism. Such a position is closely linked to the rise of liberal democracy as a political ideology. A rise which has been on a global scale. This valorizes the individual as compared with the group, and the family as compared to the social whole, within the context of expanded economic groupings and markets. Such an ideological position sees the role of the state as providing the ‘legitimising muscle’ to advance the cause of individuals and their families as compared to larger social groupings. These perceptions were applied in Australia, even under a Labor Government. In this sense social justice policies in ‘new times’ are ideological, they act as a political lever to legitimate economic restructuring. They are policies designed to carry disparate groups forward and together on a common wave of economic reform. They are used to ‘sell’ economic reform as being ‘good’ for all of society. Against the backdrop of economic rationalism and liberal democratic ideals there emerges a language geared to the production of an economically viable self, self image, self identity, self esteem and self confidence. As a result, the sense of identity as ‘social’ is lost from view. This thesis argues that what is needed is a new way of looking at social justice in education. A way that reaches beyond the solutions forwarded by the political Left and the Right. It is about the development of an understanding of the way in which an assimilation of the hyper individual and the social group can result in the emergence of the socially responsible individual. This is a cultural shift that sees the individual/society dualism presented in a new way. The categories enter into a new relationship where the balance shifts away from the individual towards society. A shift to a culture where the individual’s rights and responsibilities are respected within a social whole. Such a cultural shift would result in a curriculum which would build social identity, promoted socially responsible independent thought and make space for creativity and the aesthetic. A ‘curriculum for social responsibility’ would be a socially just curriculum.

Quantities of foods consumed by 12- to 24-month-old New Zealand children

Aim:  The present study aimed to estimate small, median and large daily quantities of frequently consumed foods and identify which food groups are important sources of key micronutrients for 12- to 24-month-old New Zealand children.

Methods:  A community-based cross-sectional survey was conducted in three cities in the South Island of New Zealand. Healthy toddlers (n = 188) were randomly selected using multistage sampling. Three non-consecutive 1-day weighed food records were collected from each child and the frequencies and daily quantities of foods and beverages, and important sources of iron and zinc, were determined.

Results:  Fifty percent or more of the children consumed the following foods at least once over 3 days (median gram intake among toddlers who consumed the food): milk (366 g), white bread (29 g), banana (70 g), potato (34 g), cheese (12 g), apple (39 g), ‘Weetbix’ whole-wheat breakfast cereal (16 g), yeast extract spread (‘Marmite’, ‘Vegemite’) (2 g), carrot (17 g) and margarine (4 g). Dairy, cereals and the meat/fish/poultry/eggs/nuts food group were the most important sources of iron and zinc in the toddlers' diets, providing 69.1% of iron and 86.3% of zinc.

Conclusion:  This research provides dietitians, other health professionals, researchers and policy-makers with detailed information on daily quantities of foods and beverages frequently consumed by toddlers that can be used for dietetic counselling, dietary assessment, and to develop food-based dietary guidelines specifically for toddlers.

Shedding new light on old species identifications : morphological and genetic evidence suggest a need for conservation status review of the critically endangered bat, Saccolaimus saccolaimus

Information based on the accurate identification of species is a vital component for achieving successful outcomes of biodiversity conservation and management. It is difficult to manage species that are poorly known or that are misidentified with other similar species. This is particularly problematic for rare and threatened species. Species that are listed under endangered species classification schemes need to be identified accurately and categorised correctly so that conservation efforts are appropriately allocated. In Australia, the emballonurid Saccolaimus saccolaimus is currently listed as ‘Critically Endangered’. On the basis of new observations and existing museum specimens, we used a combination of genetic (mitochondrial DNA sequence) and morphological (pelage characteristics, dig III : phalanx I length ratio, inter-upper canine distance) analyses to identify six new geographic records for S. saccolaimus, comprising ~100 individuals. Our analyses also suggested that there are likely to be more records in museum collections misidentified as S. flaviventris specimens. The external morphological similarities to S. flaviventris were addressed and genetic, morphological and echolocation analyses were used in an attempt to provide diagnostic characters that can be used to readily identify the two species in the field. We recommend genetic testing of all museum specimens of Australian Saccolaimus to clarify species’ distributions and provide data for reassessing the conservation status for both S. saccolaimus and S. flaviventris. Museum curators, taxonomists and wildlife managers need to be aware of potential species misidentifications, both in the field and laboratory. Misidentifications that result in misclassification of both threatened and non-threatened species can have significant implications.

Defining citizenship for a new nation: Papua New Guinea, 1972–1974

A key part of any process of decolonisation is the need for the emerging nation to determine the rules for citizenship. In Papua New Guinea, what it meant to be a citizen was the first topic that the Constitutional Planning Committee considered when it set about its task to develop a ‘home grown’ constitution in late 1972. The process by which it first comprehended this matter and then involved thousands of Papua New Guineans in their villages, missions and schools in a territory-wide exercise in consultation forms the subject of this paper. The records of the discussions that took place between February and April of 1973 reveal much of how the criteria for membership of the national enterprise came to be established. This case study of defining citizenship in PNG demonstrates the intensive consultation of the local peoples on key issues in nation-building and reveals the high degree of Indigenous agency in the decolonisation process.

First records of dive durations for a hibernating sea turtle

The first published record, from the early 1970s, of hibernation in sea turtles is based on the reports of the indigenous Indians and fishermen from Mexico, who hunted dormant green turtles (Chelonia mydas) in the Gulf of California. However, there were no successful attempts to investigate the biology of this particular behaviour further. Hence, data such as the exact duration and energetic requirements of dormant winter submergences are lacking. We used new satellite relay data loggers to obtain the first records of up to 7 h long dives of a loggerhead turtle (Caretta caretta) overwintering in Greek waters. These represent the longest dives ever reported for a diving marine vertebrate. There is strong evidence that the dives were aerobic, because the turtle surfaced only for short intervals and before the calculated oxygen stores were depleted. This evidence suggests that the common belief that sea turtles hibernate underwater, as some freshwater turtles do, is incorrect.

Improved risk predictions via sparse imputation of patient conditions in electronic medical records

Electronic Medical Records (EMR) are increasingly used for risk prediction. EMR analysis is complicated by missing entries. There are two reasons - the “primary reason for admission” is included in EMR, but the co-morbidities (other chronic diseases) are left uncoded, and, many zero values in the data are accurate, reflecting that a patient has not accessed medical facilities. A key challenge is to deal with the peculiarities of this data - unlike many other datasets, EMR is sparse, reflecting the fact that patients have some, but not all diseases. We propose a novel model to fill-in these missing values, and use the new representation for prediction of key hospital events. To “fill-in” missing values, we represent the feature-patient matrix as a product of two low rank factors, preserving the sparsity property in the product. Intuitively, the product regularization allows sparse imputation of patient conditions reflecting common comorbidities across patients. We develop a scalable optimization algorithm based on Block coordinate descent method to find an optimal solution. We evaluate the proposed framework on two real world EMR cohorts: Cancer (7000 admissions) and Acute Myocardial Infarction (2652 admissions). Our result shows that the AUC for 3 months admission prediction is improved significantly from (0.741 to 0.786) for Cancer data and (0.678 to 0.724) for AMI data. We also extend the proposed method to a supervised model for predicting of multiple related risk outcomes (e.g. emergency presentations and admissions in hospital over 3, 6 and 12 months period) in an integrated framework. For this model, the AUC averaged over outcomes is improved significantly from (0.768 to 0.806) for Cancer data and (0.685 to 0.748) for AMI data.

Hierarchical Bayesian nonparametric models for knowledge discovery from electronic medical records

Electronic Medical Record (EMR) has established itself as a valuable resource for large scale analysis of health data. A hospital EMR dataset typically consists of medical records of hospitalized patients. A medical record contains diagnostic information (diagnosis codes), procedures performed (procedure codes) and admission details. Traditional topic models, such as latent Dirichlet allocation (LDA) and hierarchical Dirichlet process (HDP), can be employed to discover disease topics from EMR data by treating patients as documents and diagnosis codes as words. This topic modeling helps to understand the constitution of patient diseases and offers a tool for better planning of treatment. In this paper, we propose a novel and flexible hierarchical Bayesian nonparametric model, the word distance dependent Chinese restaurant franchise (wddCRF), which incorporates word-to-word distances to discover semantically-coherent disease topics. We are motivated by the fact that diagnosis codes are connected in the form of ICD-10 tree structure which presents semantic relationships between codes. We exploit a decay function to incorporate distances between words at the bottom level of wddCRF. Efficient inference is derived for the wddCRF by using MCMC technique. Furthermore, since procedure codes are often correlated with diagnosis codes, we develop the correspondence wddCRF (Corr-wddCRF) to explore conditional relationships of procedure codes for a given disease pattern. Efficient collapsed Gibbs sampling is derived for the Corr-wddCRF. We evaluate the proposed models on two real-world medical datasets - PolyVascular disease and Acute Myocardial Infarction disease. We demonstrate that the Corr-wddCRF model discovers more coherent topics than the Corr-HDP. We also use disease topic proportions as new features and show that using features from the Corr-wddCRF outperforms the baselines on 14-days readmission prediction. Beside these, the prediction for procedure codes based on the Corr-wddCRF also shows considerable accuracy.

Predicting risk of suicide attempt using history of physical illnesses from electronic medical records

BACKGROUND: Although physical illnesses, routinely documented in electronic medical records (EMR), have been found to be a contributing factor to suicides, no automated systems use this information to predict suicide risk.

OBJECTIVE: The aim of this study is to quantify the impact of physical illnesses on suicide risk, and develop a predictive model that captures this relationship using EMR data.

METHODS: We used history of physical illnesses (except chapter V: Mental and behavioral disorders) from EMR data over different time-periods to build a lookup table that contains the probability of suicide risk for each chapter of the International Statistical Classification of Diseases and Related Health Problems, 10th Revision (ICD-10) codes. The lookup table was then used to predict the probability of suicide risk for any new assessment. Based on the different lengths of history of physical illnesses, we developed six different models to predict suicide risk. We tested the performance of developed models to predict 90-day risk using historical data over differing time-periods ranging from 3 to 48 months. A total of 16,858 assessments from 7399 mental health patients with at least one risk assessment was used for the validation of the developed model. The performance was measured using area under the receiver operating characteristic curve (AUC).

RESULTS: The best predictive results were derived (AUC=0.71) using combined data across all time-periods, which significantly outperformed the clinical baseline derived from routine risk assessment (AUC=0.56). The proposed approach thus shows potential to be incorporated in the broader risk assessment processes used by clinicians.

CONCLUSIONS: This study provides a novel approach to exploit the history of physical illnesses extracted from EMR (ICD-10 codes without chapter V-mental and behavioral disorders) to predict suicide risk, and this model outperforms existing clinical assessments of suicide risk.