Adrenocortical stress responses influence an invasive vertebrate's fitness in an extreme environment

Continued range expansion into physiologically challenging environments requires invasive species to maintain adaptive phenotypic performance. The adrenocortical stress response, governed in part by glucocorticoid hormones, influences physiological and behavioural responses of vertebrates to environmental stressors. However, any adaptive role of this response in invasive populations that are expanding into extreme environments is currently unclear. We experimentally manipulated the adrenocortical stress response of invasive cane toads (Rhinella marina) to investigate its effect on phenotypic performance and fitness at the species' range front in the Tanami Desert, Australia. Here, toads are vulnerable to overheating and dehydration during the annual hot-dry season and display elevated plasma corticosterone levels indicative of severe environmental stress. By comparing unmanipulated control toads with toads whose adrenocortical stress response was manipulated to increase acute physiological stress responsiveness, we found that control toads had significantly reduced daily evaporative water loss and higher survival relative to the experimental animals. The adrenocortical stress response hence appears essential in facilitating complex phenotypic performance and setting fitness trajectories of individuals from invasive species during range expansion.

Human residential status and habitat quality affect the likelihood but not the success of lapwing breeding in an urban matrix

Wildlife living in the suburbs faces the challenge of dealing with human presence and yard management (including the occurrence of pets) which vary at the scale of the house block. This study examined the influence of ecological factors (e.g. extent of grass and food availability) and anthropogenic factors (e.g. human activity and garden usage) on breeding site choice and reproductive success of the ground-nesting masked lapwing Vanellus miles on Phillip Island, Australia. Lapwings nested less frequently in residential properties (high levels of human usage) compared with vacant blocks and holiday houses. They were also more likely to breed on properties with high food availability and larger areas of grass. None of these variables influenced clutch size or the probability of eggs hatching, although larger clutches and higher hatching rates tended to be associated with more food. This study shows that, for an urban exploiting species, habitat quality is not homogenous at the scale of the house block, and that human activity is avoided by a species generally considered highly tolerant of people.

Contextualizing palimpsest of collective memory in an urban hertigae site : case Study of Chahar Bagh, Shiraz - Iran

A landscape or site, which has been inhabited for long, consists of layers of history. This history is sometimes reserved in forms of small physical remnants, monuments, memorials, names or collective memories of destruction and reconstruction. In this sense, a site/landscape can be presumed as what Derrida refers to as a ‘palimpsest’. A palimpsest whose character is identified in a duality between the existing layers of meaning accumulated through time, and the act of erasing them to make room for the new to appear. In this study, the spatial collective memory of the Chahar Bagh site which is located in the historical centre of Shiraz will be investigated as a contextualized palimpsest, with various projects adjacent one another; each conceptualized and constructed within various historical settings; while the site as a heritage is still an active part of the city’s cultural life. Through analysing the different layers of meaning corresponding to these adjacent projects, a number of principals for reading the complexities of similar historical sites can be driven.

Tradition : connecting the past and present : a case study of Xintiandi in Shanghai

Tradition and modernisation are often seen as a binary opposition. In an urban environment, traditional built form seems incompatible to modern way of life, and the adaptation of traditional neighbourhoods to modern use often causes controversy. Nowadays, ideas about ‘what is tradition’ become shifting, and traditional townscape does not necessarily mean an obstacle to modernisation. This paper reveals how the role of traditional elements is played in China’s urban development. The case study of Xintiandi, Shanghai, where traditional townscape is restored, highlights the connection of the city’s past and present. Xintiandi is a successful yet controversial city renewal project, where Shanghai’s traditional housing form Shikumen is restored and put into adaptive uses. In the course of urban modernisation, the role of tradition as a representation of the connection between the city’s past and present deserves more study. This paper aims to add a perspective to the literature on the study of tradition. It argues for the diversity and fluidity of the ideas about tradition., In this view, tradition is not necessarily in dichotomy with, or opposite to modernisation; rather, tradition justifies the needs of modernisation and supplements its outcomes. The paper is developed in light of works on tradition by Shils, Hobsbawm, Giddens and others; The case study of Xintiandi shows what Old Shanghai tradition means to this city today, and how traditional elements are adapted and used in the course of urban modernisation.

The uptake of an early warning system in an Australian emergency department : a pilot study

Objectives: To evaluate the uptake of an emergency department early warning system (ED EWS) for recognition of, and response to, clinical deterioration.

Design, setting and participants: A descriptive exploratory study conducted in an urban district hospital in Melbourne, Australia. Systematic sampling was used to identify every 10th patient for whom the ED EWS was activated from May 2009 to May 2011.

Main outcome measures: Patient characteristics, ED system data and ED EWS activation characteristics.

Results: ED EWS activation occurred in 1.5% of ED patients; 204 patients were included in this pilot study. The median age was 65.1 years (interquartile range [IQR], 47.8-77.5 years), 89.2% of patients were classified as triage category 2 or 3, and 82.4% of patients were seen by medical staff before ED EWS activation. Hypotension (27.7%) and tachycardia (23.7%) were the most common reasons for ED EWS activation. Median duration of clinical instability was 39 minutes (IQR, 5- 129 minutes). Nurses made 93.1% of ED EWS activations. Median time between documenting physiological abnormalities and ED EWS activation was 5 minutes (IQR, 0- 20). Most patients (57.8%) required hospital admission: 4.4% of patients required intensive care unit admission.

Conclusions: The ED EWS resulted in at least two formal reports of clinical deterioration in ED patients per day, indicating reasonable uptake by clinicians. A greater understanding of clinical deterioration in ED patients is warranted to inform an evidence-based approach to recognition of, and response to, clinical deterioration in ED patients.

Fuzzy haptic augmentation for telerobotic stair climbing

Teleoperated robotic systems provide a valuable solution for the exploration of hazardous environments. The ability to explore dangerous environments from the safety of a remote location represents an important progression towards the preservation of human safety in the inevitable response to such a threat. While the benefits of removing physical human presence are clear, challenges associated with remote operation of a robotic system need to be addressed. Removing direct human presence from the robot's operating environment introduces telepresence as an important consideration in achieving the desired objective. The introduction of the haptic modality represents one approach towards improving operator performance subject to reduced telepresence. When operating in an urban environment, teleoperative stair climbing is not an uncommon scenario. This work investigates the operation of an articulated track mobile robot designed for ascending stairs under teleoperative control. In order to assist the teleoperator in improved navigational capabilities, a fuzzy expert system is utilised to provide the teleoperator with intelligent haptic augmentation with the aim of improving task performance.

Haptic control methodologies for telerobotic stair traversal

Teleoperated mobile robots provide the ability for a human operator to safely explore and evaluate hazardous environments. This ability represents an important progression towards the preservation of human safety in the inevitable response to situations such as terrorist activities and urban search and rescue. The benefits of removing physical human presence from such environments are obvious, however challenges inhibiting task performance when remotely operating a mobile robotic system need to be addressed. The removal of physical human presence from the target environment introduces telepresence as a vital consideration in achieving the desired objective. Introducing haptic human-robotic interaction represents one approach towards improving operator performance in such a scenario. Teleoperative stair traversal proves to be a challenging task when undertaking threat response in an urban environment. This article investigates the teleoperation of an articulated track mobile robot designed for traversing stairs in a threat response scenario. Utilising a haptic medium for bilateral human-robotic interaction, the haptic cone methodology is introduced with the aim of providing the operator with a vision-independent, intuitive indication of the current commanded robot velocity. The haptic cone methodology operates synergistically with the introduced fuzzy-haptic augmentation for improving teleoperator performance in the stair traversal scenario.

Peak oxygen uptake of 12-18-year-old boys living in a densely populated urban environment

The purposes of this study were to provide data on the peak Vo 2 of 12-18-year-old boys from Hong Kong, a densely populated urban environment; to compare these data with those for other similarly aged populations; and to examine the correlations between peak Vo 2 and various anthropometric parameters of this group. A stratified, random sample of 86 ethnic Chinese boys had their peak Vo 2 determined using an on-line gas analysis system during incremental, treadmill running. The mean peak 17o2 of the boys was 2.7 SD 0.44 1- rain - 1 or, when expressed in relation to body mass, 52.0 SD 5-8 ml- kg- 1. min - 1. Peak Vo 2 (1. min - 1) was significantly correlated with body mass (r = 0.72, p < 0.001, age (r = 0.49, p < 0.001) and height (r = 0.71, p = 0-001). Peak Vo 2 (ml 'kg- 1. min- 1) showed no correlation with age or height. These data suggest that this population group has peak Vo 2 values very similar to those observed in boys from most other population groups.

Constructing wikis as a platform for online collaboration in an e-learning environment

Previous studies conclude that finding a collaborative tool to suit the e-Iearning environment adequately is quite a task. Consequently, research has been conducted for this very purpose, to trial the use of wikis as a platform to support collaboration in a way that students will embrace and adopt for regular use. The wiki is easily accessible, requires no software and allows its contributors to feel a sense of responsibility and ownership. However there are wiki related challenges that have yet to be researched in the online e-Iearning environment. Possible intrusions, no opinion control, user hostility, and unintentional deletions or editing all require further investigation. This paper will further research the wiki environment in the tertiary e-Iearning setting, as well as consider wiki moderation, member authentication, and interest sustainability to support this community focused collaborative tool. Relevant results from the current case study are explored whilst delivering meaningful data, thus providing an insight into how wikis are an appropriate platform to incorporate in the online collaborative environment.

Teaching practices for effective cooperative learning in an online learning environment (OLE)

As a teaching practice the application of cooperative learning in tertiary education can present unique challenges for both the practitioner and her students. Mastering this teaching approach requires careful planning, design and implementation for effective deployment in a face-to-face setting. In this setting the success of the cooperative learning approach has been demonstrated. The complexity is significantly increased by additional variables such as the selection and application of technological teaching tools and the change in nature of existing variables including awareness of students' social and communication skills when applying this practice in an Online Learning Environment (OLE). In addition student acceptance of this e-learning approach to learning also needs to be carefully considered. The practitioner must be aware of these factors and have suitable methods in place to support collaboration and interaction between student groups to ensure the ultimate goal with regard to students' learning is achieved. This paper considers how cooperative learning can be combined effectively with these variables and factors of an OLE, and begins with the presentation of a conceptual framework to represent this relationship as a constructive teaching practice. It is anticipated that the conceptual framework would be applied by other practitioners to facilitate cooperative teaching within their OLE. To demonstrate the validity of the framework a case scenario is provided using an Information Technology (IT) undergraduate unit named 'IT Practice'. This is a wholly online unit where extensive participation by the students within small groups is a core requirement. The paper demonstrates the themes of designing curriculum and assessment, as well as flexible teaching strategies for learner diversity but primarily concentrates on managing an effective OLE; that is managing small groups in an online teaching environment.

Equity and access in an e-enhanced, international, university environment: learning style implications

Globalisation and technological development have simultaneously pressured universities to provide students with flexible and innovative learning options. Among the ways universities address these issues are by internationalising their curriculum and investing in educational technology. These changes have affected pedagogical and andragogical approaches and outcomes. Learning styles potentially affect the strategic approach of academics when utilising innovative technological tools in their teaching, which converges with internationalisation of the curriculum and a diverse student body to accentuate the issues of equity and access. The literature in this field is explored in context with the authors’ diverse experiences to provide policy makers, academics and other education stakeholders with a new perspective.

Managing stakeholder 'push back', an exploratory investigation into dealing with negative cross cultural communication in a global environment

This paper addresses the issue of a current business phenomenon – ‘push back’. This phenomenon has been experienced by a number of transnational companies. It is embedded in the challenges of cross-cultural communication and involves the linkage of local culture activists with globalisation acitivists in an alliance to stop business growth. This exploratory investigation examines three multinational organisations using qualitative research. From the findings a model has been developed in an attempt to provide practitioners with a framework with which to understand ‘push back’. The complexity of combating alliances of this nature raises challenges for the current approaches to marketing and the need for a multi-stakeholder approach in cross-cultural communication is suggested.