Assessment method difference : comparisons between international and domestic students within a first year undergraduate management course

This paper investigates the assessment methods and student results within a first year undergraduate management course offered within the business faculty of an Australian university. This course is compulsory for those studying for a commerce or management degree. The assessment results of full fee paying international students were compared with those of domestic students, during four teaching semesters in 2009 and 2010. Analysis compares 2,682 students’ numerical results for two constructed response assignments to their results for an examination comprising both multiple choice questions and constructed response questions. It also compares the results of international and domestic students across metropolitan, regional and rural campuses. However due to little comparison data for multiple campuses, findings are consolidated by domestic and international students, university-wide. International students were found to achieve lower results than domestic students for constructed response assessment tasks, but higher results than domestic students for multiple choice question assessments. These findings have implications for instructors eager to provide a level assessment playing field for both domestic and international students, enabling both groupings to take advantage of existing strengths but also to improve their weaknesses. This research led to a restructuring and rescheduling of assessment tasks for the 2012 academic year.

Methodological problem with comparing increases in different measures of body weight

Background A number of studies have compared proportional increases over time in waist circumference (WC) and body mass index (BMI). However this method is flawed. Here, we explain why comparisons of WC and BMI must take into account the relationship between them. We used data from two cross-sectional US surveys (NHANES 1988-94 and 2005-06), and calculated the percentage change in the average BMI and the average WC between the two surveys, comparing the results with a regression analysis of changes in WC relative to BMI.

Findings The crude percentage change in BMI (5.8%) was marginally greater than for WC (5.1%). But these percentages cannot be directly compared, as the relationship between the measures is described by a regression equation with an intercept term that does not equal zero. The coefficient of time from the regression equation will determine whether or not WC is on average larger for a given BMI at the second compared with the first time point.

Conclusion Differences in the percentage change in WC and the percentage change in BMI cannot be usefully directly compared. Comparisons of increases in the two measures must account for the relationship between them as described by the regression equation.

Non-invasive collection and examination of human corneal epithelial cells

Purpose. To report the development of a new apparatus for non-invasive collection of human corneal epithelial cells.

Methods. Previous methods of non-invasive, irrigative corneal cell collection resulted in low cell yields limiting potential analysis. A new ocular surface cell collection apparatus (OSCCA) was designed to collect more epithelial cells from direct irrigation of the corneal surface to allow for clinical comparisons. Forty-five samples were obtained (unilateral or bilateral over seven visits) from five human participants. Cell yield, size, phenotype, and corneal staining (prior and post eye wash) were examined.

Results. On average 364 ± 230 epithelial cells were collected from the cornea per eye. Epithelial cell sizes ranged from 8.21 to 51.69 μm in diameter, and 67.30 to 2098.85 μm2 area. The proportion of corneal specific cells collected per sample was 75 ± 14% as determined by positive K3 expression with AE5. On average, 77 ± 0.2% of epithelial cells harvested were nucleated, the remainder were non-nucleated ghost cells. Corneal staining was reduced in the OSCCA-washed vs. contralateral non-washed eyes (p = 0.02).

Conclusions. The OSCCA allows collection of human corneal epithelial cells with significantly higher yields, and greater specificity than previously reported. Reduced corneal staining observed post eye-wash demonstrated the safety of the technique, and its ability to remove cells directly from the corneal surface. The OSCCA could provide an objective non-invasive method of investigating pathological changes, effects of topical therapeutics, and impact of contact lenses and care-solutions of the cells of the ocular surface.

End-of-life care for aged care residents presenting to emergency departments

Background: The number of patients from Aged Care presenting to acute care is increasing, many of whom have a life limiting illness.

Aims: To identify differences in relation to Aged Care Residents presenting to Emergency departments who died during a hospital admission compared to those who were referred to the hospital based palliative care.

Methods: Review of a stratified random sample of 90 Aged Care residents transferred to acute care who died during admission in 2009; half the sample received palliative care. Comparisons were made with regard to age; gender; co-morbidities; symptoms, investigations and active treatment; prior admissions and costs.

Results: The median age of patients was 87.5 years, 61% were female and 38% had three or more admissions in the year prior to death. Patients with a length of stay of four or more days were 2.98 times (CI, 95%:1.11-8.03) and patients with agitation were 3.08 (CI 95%:1.10- 8.64) times more likely to be referred to palliative care. Patients who received palliative care had significantly fewer investigations or active treatment in the 24 hours prior to their death (p< 0.01) and palliated patients had significantly lower average costs per day of admission ($1022, SD=$441) compared to those who were not palliated ($ 831; SD= $ 1041) (p< 0.001).

Discussion: Our study indicates there is a difference between dying patients who received palliative care compared to those who did not in an acute care setting. Further research into the outcomes of patients discharged back to Aged Care facilities for palliative care warrants investigation.

Factors affecting capital program performance audit findings

Complex capital programs require specialized management techniques, in order to address the volatility, cost overruns, significant delays in completion, and failures with which such programs are typically associated. The need is greater than ever for careful oversight, especially for programs that expend public monies.

Audit is commonly a statutory or governance requirement on such programs, but traditional performance audit techniques and standards may be insufficient for certain types of programs and industries, providing a mere illusion of oversight adequacy instead of the assurance that is needed. In order to most appropriately define the performance audit scope, phrase the solicitation for services, select the audit team, and provide support to the auditors during the engagement, public and private sector entity auditees need to understand the factors that impact performance audit results and effectiveness. The question becomes one of how performance audit can be improved, and stakeholders satisfied regarding program achievements, accountability for resource use, transparency in operations, and risk management.

The author considered program complexity, governance, project controls, the history and evolution of the audit function, stakeholder expectations, assurance, and obstacles to audit, and used this information in conjunction with data from a large sample of 775 audit reports from complex construction programs, to derive questions and conclusions about performance audit results and effectiveness, and comparisons to expenditure audit results. The ultimate goal was to define key components in the execution of performance audits, based on theconclusions of the analysis, in order to improve performance audit findings and thus their applicability and usefulness.

While this study focused on program performance audit, it was also related to the field of program management. Although the data population was concentrated in the area of construction programs, conclusions from this research may also be applied to other complex, multifaceted or phased activities such as projects and programs in other industries (manufacturing, information technology), and also pursuits such as major event planning, company launch, mergers, and large program implementations or rollouts.

The research results clearly demonstrated that different types of findings were generated by different audit scopes. The author observed that typical audit findings focused on routine procedural, accounting, and controls errors. On average, contract expenditure audits questioned only 2.65% of expenditures, and performance audits of large complex programs questioned only 0.03% of expenditures. The majority (72.56%) of the performance audits in the sample yielded no findings or questioned costs.

There were significant positive correlations between: the number of expenditures tested and the number of qualitative findings, inclusion of construction experts on the audit team and the percentage of expenditures questioned, inclusion of construction experts on the audit team and the number of qualitative findings, broader audit scope and the percentage of expenditures questioned, and broader audit scope and the number of qualitative findings. Of these, auditor expertise and audit scope were the driving factors.

There were significant negative correlations between the application of agreed-upon procedures and the percentage of expenditures questioned, and the application of agreed upon-procedures and the number of qualitative findings. It was determined that the significant negative correlation between the application of audit standards and the number of qualitative findings was due to other factors, such as the application of agreed-upon procedures and the lack of construction experts on the audit team.

Other findings, resulting from review of the data, were unrelated to the research questions yet of considerable importance to industry. An extremely high percentage (81%) of the “performance audits” instead applied a very limited set of agreed-upon-procedures (AUP) in the engagement, According to the American Institute of Certified Public Accountants (CPAs), AUP engagements could not be classified as audits. Thus, it was inappropriate for the accounting firms to apply AUP engagements in lieu of a performance audit, and it was especially egregious for them to state in their report that the engagements were conducted in accordance with audit standards, as AUP engagements and the specific audit standards were by their very nature mutually exclusive.

Comparisons of seismic rock slope stability assessments between the Hoek-Brown and Mohr-Coulomb failure criteria

Current investigations have shown that earthquakes can trigger significant damages of equipment, property infrastructure and environment. This is a persistent cause of economic loss for any country, especially for the loss of life. The conventional method for slope stability design is to utilize limit equilibrium method (LEM) in conjunction with the pseudo-static (PS) approach. However, the LEM has a significant drawback which is to determine the slip surface before factor of safety calculation. The numerical upper and lower bound limit analysis method employed in this paper can avoid this limitation. In this study, the presented slope stability evaluations considering earthquake effects based on the finite difference method will be discussed and compared with the results from the numerical limit analysis methods.

Characterization of nine polymorphic microsatellite loci in the dyeing poison frog Dendrobates tinctorius (Dendrobatidae), and their cross-species utility in two other dendrobatoid species

While field and laboratory based studies have provided significant insights into the parental care and courtship behaviour of dendrobatoid frogs, a comprehensive assessment of their genetic mating systems and population genetic parameters has been precluded because ofthe lack of highly variable DNA markers. Here we document the development of nine novel polymorphic microsatellite markers for the dyeing poison frog Dendrobates tinct or ius (Dendrobatidae ). We found between three and 16 alleles per locus in 60 individuals (30 males, 30 females) from the field site Saut Parare, French Guiana, with an average observed heterozygosity of 0. 75. None of the loci deviated significantly from Hardy-Weinberg equilibrium or showed linkage disequilibrium. We also report successful cross-species amplification of the nine markers in two other dendrobatoid species (Allobates femora/is and Oophaga pumilio). These markers have the potential to aid in determining the genetic structure of local populations, identifying small-scale phylogenies such as parent-offspring relationships and will allow for cross-species comparisons within dendrobatoid species. Therefore, these markers can be applied to a wide range of scientific fields, such as conservation, behavioural ecology and evolutionary biology.

Global patterns for upper ceilings on migration distance in sea turtles and comparisons with fish, birds and mammals

1. Some animals migrate huge distances in search of resources with locomotory mode (flying/swimming/walking) thought to drive the upper ceilings on migration distance. Yet in cross-taxa comparisons, upper ceilings on migration distance have been ignored for one important group, sea turtles. 2. Using migration distances recorded for 407 adult and 4715 juvenile sea turtles across five species, we show that for adult cheloniid turtles, the upper ceiling on species migration distances between breeding and foraging habitats (1050–2850 km across species) is similar to that predicted for equivalent-sized marine mammals and fish. 3. In contrast, by feeding in the open ocean, adult leatherback turtles (Dermochelys coriacea) and juveniles of all turtle species can travel around 12 000 km from their natal regions, travelling across the widest ocean basins. For juvenile turtles, this puts their maximum migration distances well beyond those expected for equivalent-sized marine mammals and fish, but not those found in some similar sized birds. 4. Post-hatchling turtles perform these long-distance migrations to juvenile foraging sites only once in their lifetime, while adult turtles return to their breeding sites every few (generally ?2) years. Our results highlight the important roles migration periodicity and foraging mode can play in driving the longest migrations, and the implications for Marine Protected Area planning are considered in terms of sea turtle conservation.

Face recognition from face motion manifolds using robust kernel resistor-average distance

In this work we consider face recognition from face motion manifolds. An information-theoretic approach with Resistor-Average Distance (RAD) as a dissimilarity measure between distributions of face images is proposed. We introduce a kernel-based algorithm that retains the simplicity of the closed-form expression for the RAD between two normal distributions, while allowing for modelling of complex, nonlinear manifolds. Additionally, it is shown how errors in the face registration process can be modelled to significantly improve recognition. Recognition performance of our method is experimentally demonstrated and shown to outperform state-of-the-art algorithms. Recognition rates of 97–100% are consistently achieved on databases of 35– 90 people.

STEM: country comparisons: international comparisons of science, technology, engineering and mathematics (STEM) education. Final report.

From 22 studies of Science, Technology, Engineering and Mathematics (STEM) policies and practices around the world the STEM: country comparisons report makes 24 key findings which highlight a number of challenges for Australia with STEM participation and provides a basis of ideas to tackle these.

International comparisons of mathematics classrooms and curricula: the validity-comparability compromise

The pursuit of commensurability in international comparative research by imposing general classificatory frameworks can misrepresent valued performances, school knowledge and classroom practice as these are actually conceived by each community and sacrifice validity in the interest of comparability. The “validity-comparability compromise” is proposed as a theoretical concern with significant implications for international cross-cultural research. We draw on current international research to illustrate a variety of aspects of the issue and its consequences for the manner in which international research is conducted and its results interpreted. The effects extend to data generation and analysis and constitute essential contingencies on the interpretation and application of international comparative research.