Integration of multimedia technology into the curriculum of forensic science courses using crime scene investigations.

Virtual reality technology is a powerful tool for the development of experimental learning in practical situations. Creation of software packages with some element of virtual learning allows educators to broaden the available experience of students beyond the scope that a standard curriculum provides. This teaching methodology is widely used in the delivery of medical education with many surgical techniques being practised via virtual reality technologies (see Engum et al., 2003). Use has been made of this technology for a wide range of teaching applications such as virtual field trials for an environmental science course (Ramasundaram et al., 2005), and community nursing visiting education scenarios (Nelson et al., 2005) for example. Nelson et al. (2005) imaged three-dimensional representations of patient living accommodation incorporating views of patient medication in order to deliver care modules via a problem-based learning approach. The use of virtual reality in the teaching of crime scene science was pioneered by the National Institute of Forensic Science in Australia as part of their Science Proficiency Advisory Committee testing programme. A number of scenarios were created using CDROM interfacing, allowing as near as possible normal procedures to be adopted. This package included proficiency testing integrated into the package and serves as a paradigm for the creation of virtual reality crime scene scenarios (Horswell, 2000). The package is commercially available on CD-ROM as part of the series ‘After the Fact’ (http://www.nfis.com.au). The CD-ROM package is geared to proficiency training of serving scenes of crime officers and thus contains details that may not be needed in the education of other parties with a need for forensic awareness. These include undergraduate students studying towards forensic science degree programmes in the UK as well as serving Police Officers. These groups may need virtual reality crime scene material geared to their specific knowledge requirements. In addition, Prof J Fraser, President of the Forensic Science Society and a former police Scientific Support Manager, speaking to the United Kingdom, House of Commons Science and Technology Select Committee in its report ‘Forensic Science on Trial’ (2005) states: ‘The documented evidence in relation to police knowledge of forensic science, in terms of making the best use of forensic science, is consistently clear, that their knowledge needs to improve and therefore their training needs to improve’. This clearly identifies a need for further training of serving police officers in forensic science. It was with this in mind that staff at the University collaborated with the West Midlands Police Service. The aim was to create a virtual reality CD-ROM that could serve as part of the continuing professional development of serving police officers in the area of scene management. Adaptation of the CD-ROM could allow some introductory materials to help undergraduate students of forensic science

Does correction for guessing reduce students' performance on multiple-choice examinations? Yes? No? Sometimes?

Multiple-choice (MC) examinations are becoming increasingly popular in higher education because they can be used effectively to assess breadth of knowledge in large cohorts of students. This present research investigated Psychology students' performance on, and experiences of, MC examinations with and without correction for guessing. In Study 1, data were collected from two cohorts of students across three Psychology MC examinations. The results revealed that students scored higher, and left fewer questions unanswered, when there was no correction for guessing. Furthermore, when the correction for guessing was removed from the theory MC examination, students who were told there was no correction for guessing did better than those told there was a correction. In addition, there was limited evidence of gender differences, with female students performing significantly better on one MC examination than males. In Study 2, a further set of first-year Psychology students reported their experiences of correction for guessing on open-book and closed-book MC examinations. Students reported feeling less anxious and more confident on the open-book MC examination. The findings of both of these studies have implications for instructors deciding whether or not correction for guessing is appropriate, and for the advice to be given to students preparing for MC examinations

Examining the components of children's peer liking as antecedents of school adjustment

Children’s social interactions with their peers influence their psychosocial adjustment; consequently, the relationship between class-wide peer liking, same-gender peer liking, and school adjustment was explored in two age groups. Peer liking was analysed using the social relations model (SRM). In Study 1, 205 children (103 female and 102 male, Mage = 7.15, SD = 7 months) completed measures of peer liking and school adjustment, and teachers completed the Short-Form TRSSA. In Study 2, 197 children (98 female and 90 male, Mage = 9.87, SD = 5.9 months) completed measures of peer liking and school adjustment. Both studies yielded evidence of reciprocal liking and individual differences in the ratings of liking awarded to, and elicited from, both peer groups. Multigroup path analysis, with groups created according to gender, revealed that elements of liking predicted different aspects of school adjustment with some variation according to age and gender. Together, these findings suggest that the SRM can be used to examine peer liking and underscore the importance of children’s peers for school adjustment

Parental rearing style as a predictor of attachment and psychosocial adjustment during young adulthood

Parental rearing-styles are crucial for psychosocial adjustment both during childhood and adulthood. The current study examined whether: (a) parental rearing-styles predicted psychosocial adjustment in young-adulthood, (b) this relationship was mediated by attachment styles , and ( c ) gender differences occur in these relationships. Two hundred and forty (103 male and 132 female) university students completed measures assessing parental rearing-style , current attachment style, romantic relationship satisfaction, friendship quality, self-esteem, and social competence. Multigroup structural equation modelling, conducted separately by gender, revealed that parental rearing-style predicted psychosocial adjustment during young-adulthood. Further, there was also evidence of gender differences and that self-models and other-models of attachment mediated this relationship. Together, these findings reinforce the importance of perceived parental rearing-style for subsequent psychosocial adjustment

Quantifying physiological influences on otolith microchemistry

Trace element concentrations in fish earstones (‘otoliths’) are widely used to discriminate spatially discrete populations or individuals of marine fish, based on a commonly held assumption that physiological influences on otolith composition are minor, and thus variations in otolith elemental chemistry primarily reflect changes in ambient water chemistry. We carried out a long-term (1-year) experiment, serially sampling seawater, blood plasma and otoliths of mature and immature European plaice (Pleuronectes platessa L.) to test relationships between otolith chemistry and environmental and physiological variables. Seasonal variations in otolith elemental composition did not track seawater concentrations, but instead reflected physiological controls on metal transport and biokinetics, which are likely moderated by ambient temperature. The influence of physiological factors on otolith composition was particularly evident in Sr/Ca ratios, the most widely used elemental marker in applied otolith microchemistry studies. Reproduction also triggered specific variations in otolith and blood plasma metal chemistry, especially Zn/Ca ratios in female fish, which could potentially serve as retrospective spawning indicators. The influence of physiology on the trace metal composition of otoliths may explain the success of microchemical stock discrimination in relatively homogenous marine environments, but could complicate alternative uses for trace element compositions in biominerals of higher organism

Domestication for Conservation of an Endangered Species: The Case of the Wollemi Pine

A small population of tall slender conifers was discovered in 1994 in a deep rainforest canyon of the Wollemi National Park, New SouthWales, Australia. The living trees closely resembled fossils that were more than 65 million years old, and this ‘living fossil’ was recognised as a third extant genus in the Araucariaceae (Araucaria, Agathis and now Wollemia). The species was named the Wollemi pine (W. nobilis). Extensive searches uncovered very few populations, with the total number of adult trees being less than 100. Ex situ collections were quickly established in Sydney as part of the Wollemi Pine Recovery Plan. The majority of the ex situ population was later transferred to our custom-built facility in Queensland for commercial multiplication. Domestication has relied very heavily on the species’ amenability to vegetative propagation because seed collection from the natural populations is dangerous, expensive, and undesirable for conservation reasons. Early propagation success was poor, with only about 25% of cuttings producing roots. However, small increases in propagation success have a very large impact on a domestication program because plant production can be modelled on an exponential curve where each rooted cutting develops into a mother plant that, in turn, provides more rooted cuttings. An extensive research program elevated rooting percentages to greater than 80% and also provided in vitro methods for plant multiplication. These successes have enabled international release of the Wollemi pine as a new and attractive species for ornamental horticulture

On the Lifetime of the pi+pi- Atom

The pi+pi- atom decays -in the ground state - predominantly into two neutral pions. We present a general expression for the corresponding decay width in the framework of QCD (including photons). It contains all terms at leading and next-to-leading order in isospin breaking. The result allows one to evaluate the combination |a_0-a_2| of pi-pi S-wave scattering lengths from pi+pi- lifetime measurements, like the one presently performed by the DIRAC experiment at CERN.Comment: 4 pages, LaTeX-fil

Preventing disease and saving resources:the potential contribution of increasing breastfeeding rates in the UK

Two challenges stand out as we contemplate the future of health services in the United Kingdom. The first is the state of the public finances and therefore the pressure in real terms on health services funding. The second is the recurring and vexing problem of health inequalities. The state of health inequalities in Britain has been commented on by many, but we have seen precious little real change in the disproportionate burden of early death and illness among the most disadvantaged and indeed across the whole health gradient in recent years.This work was funded by UNICEF UK

Corymbia torelliana hybrids for hardwood forestry - without the weediness!

Corymbia torelliana hybrids have great potential for sustainable plantation forestry in many areas of tropical Australia. The species as a parent in hybrid breeding programs confers benefits such as resistance to Ramularia shoot blight, environmental plasticity, effective site capture and good rooting ability for clonal forestry. C. torelliana occurs naturally in rainforests and rainforest margins in the wet tropics region of Far North Qld between Shiptons’ Flat, near Cooktown and Mt Fox, near Ingham. The species has a tendency to become a weed where it is planted in areas outside of the wet tropics. Consequently, it is now listed as a noxious weed by many local councils between Grafton and Mackay and there are bans on selling, propagating and distributing the species. C. torelliana has a unique seed dispersal syndrome that may contribute to its weediness in areas where it has been introduced. Seeds are dispersed by bees, sometimes up to 300 m from the parent tree (Wallace and Trueman 1995). Native stingless bees of the genus Trigona build their nests from plant resins, and T. carbonaria forages for resin inside the mature capsules of C. torelliana. When the bees forage for resin, C. torelliana seeds become attached to the resin droplets carried by bees. The bees eventually discard the seeds outside their nests. Seeds dispersed by bees are almost all viable, and abundant germination and establishment occurs around hives and wild nests. Some beekeepers claim that C. torelliana is harmful to stingless bees. Claims are that the seed “clogs” the nest and prevents bee movement, and that the resin from C. torelliana, when used in nest structures, tends to collapse, causing death of the colony. In spite of no scientific study on the weediness of C. torelliana or the effect on stingless bees, C. torelliana has been banned from new plantings and actively removed by local councils from amenity plantings. In this study, we examined the interaction between stingless bees and C. torelliana and its hybrids in the natural range of C. torelliana in the Wet Tropics . Here we report the structure of hybrid capsules and their attractiveness to stingless bees

Substitution in a sense

The Reference Principle (RP) states that co-referring expressions are everywhere intersubstitutable salva congruitate. On first glance, (RP) looks like a truism, but a truism with some bite: (RP) transforms difficult philosophical questions about co-reference into easy grammatical questions about substitutability. This has led a number of philosophers to think that we can use (RP) to make short work of certain longstanding metaphysical debates. For example, it has been suggested that all we need to do to show that the predicate ‘( ) is a horse’ does not refer to a property is point out that ‘( ) is a horse’ and ‘the property of being a horse’ are not everywhere intersubstitutable salva congruitate. However, when we understand ‘substitution’ in the simplest and most straightforward way, (RP) is no truism; in fact, natural languages are full of counterexamples to the principle. In this paper, I introduce a new notion of substitution, and then develop and argue for a version of (RP) that is immune to these counterexamples. Along the way I touch on the following topics: the relation between argument forms and their natural language instances; the reification of sense; the difference between terms and predicates; and the relation between reference and disquotation. I end by arguing that my new version of (RP) cannot be used to settle metaphysical debates quite as easily as some philosophers would like