Self-adaptive clock synchronisation based on clock precision difference

This paper presents an innovative strategy to synchronize all virtual clocks in asynchronous Internet environments. Our model is based on the architecture of one reference clock and many slave clocks communicating with each other over the Internet. The paper makes three major contributions to this research area. Firstly, one-way information transmission is applied to reduce traffic overhead on the Internet for the purpose of clock synchronization. Secondly, the slave nodes use local virtual time and the arrival timestamp, from the reference node, to create linear mathematical trend models and to retrieve the clock precision differences between reference clock and slave clocks. Finally, a fault-tolerant and self-adaptive model executed by each slave node based on the above linear trend model is created in order to ensure that the virtual clock is running normally, even when the link between the reference node and this slave node has crashed. We also present detailed simulations of this strategy and mathematical analysis on real Internet environments.

Positioning the case to tell the story: developing the narrative or presentational account

This paper is drawn from a doctoral study (in its final stages) about the use and adoption of information and communication technologies (ICTs) to enhance the face-to-face teaching by six academic staff, who represent different disciplines and different campus locations, in a large, regional university in Australia. A collective case study was adopted as the framework for the study, and field data comprised semi-structured interviews, curriculum guides, teaching and learning resources, websites, and included results of a Teaching Practices Inventory completed by each of the research participants.

Case study is a popular choice of qualitative researchers. There are numerous examples in the literature of case study as the vehicle for examining issues concerning teachers' use of new technologies in teaching and learning. This paper situates the research study in the qualitative, interpretative research paradigm, and matches the choice of case as the research strategy to accepted characteristics of good case studies. The focus of the paper then moves to the practical, yet difficult problem faced by the researcher of ways of presenting the case, seeking a balance between the demands of prescribed, social scientific writing for an academic audience, and the need to create texts that are interesting, vital and that “make a difference”(Richardson, 2003). Using a sample case from the study, the paper examines approaches to constructing meaning from the field data to create the narrative or presentational account and, ultimately, the research text.

For goodness sake! Postlogographically de-(dis)positioning education research

How are education researchers and their research now positioned? Where are education research and researchers now positioned in the public/private debate? What is the position of practitioner research in these circumstances? My paper introduces 'post logography' as a researching trope for perturbing structuralist analytic methods towards interpreting post structuralising complexities that challenge the 'positioning' of education/research/researchers.

I discuss interpreting researching with and in (with-in) educating as intertwining ways, for turning the analytical objectivity that 'positions' subjective 'facts' as essentialised 'goods', towards exploring generative states of 'goodness'.

Education and its research are typically cast as separate constructs (like teaching and outcomes) for defining the subjectification of educational objects as valuable 'goods' - especially those with private economic value.

I argue that researched educational 'goods' are mostly teaching and outcomes focussed, and mainly privately positioned, whereas researching with-in educating for 'goodness' concerns a public disposition of exploring-learning-generativity for social knowing-acting.

I am theorising that through postlogographically de-positioning the predominance of 'facts' as private 'goods', and thereby recognising interpretive states concerning and generating 'goodness', the reductive polarisation of education/research, public/private, theorist/practitioner turns towards understanding complex continua for exploring-learning-generativity, which introduce new horizons of significance for social knowing-acting.

The measurement precision and evaluation of the diameter profiles of single wool fibres

A recent model of Single Fibre Analyser 3001 (SIFAN3001) was firstly employed to obtain the single wool fibre diameter profiles (SfFDP’s) at multiple orientations. The results showed that using SIFAN3001 to measure fibre diameter at four orientations for 50 single fibres randomly sub-sampled from each mid-side sample can produce average fibre diameter profiles (ASfFDP’s) of fibres within staples. Within the testing regime used, the precision estimates for the total samples were ±1.3µm for mean fibre diameter of staples and ±1.4µm for average fibre diameter of the ASfFDP’s at each scanned step in the diameter profile. The mean diameter ratio (ellipticity) obtained from the four orientations was 1.08±0.01, confirming that the Merino wool fibres under review were elliptical rather than circular. The elliptical morphology of wool fibres and the precision of fibre diameter measurement at each point along a fibre will be considered in the development of a mechanical model of Staple Strength testing.

e-marketing positioning your law practice

Legal practices should measure aspects of their corporate reputation including image, reputation attributes and outcomes to be able to implement a successful marketing communication campaign - audience measurement allows information to be gathered about reach and frequency - building corporate websites which reach your target audience will increase revenue and earnings.

Corticomotor excitability during precision motor tasks

The aim of this preliminary study was to investigate motor cortex (cortical) excitability between a similar fine visuomotor task of varying difficulty. Ten healthy adults (three female, seven male; 20–45 years of age) participated in the study. Participants were instructed to perform a fine visuomotor task by statically abducting their first index finger against a force transducer which displayed the level of force (represented as a marker) on a computer monitor. This marker was to be maintained between two stationary bars, also displayed on the computer monitor. The level of difficulty was increased by amplifying the position of the marker, making the task more difficult to control. Cortical measures of motor evoked potential (MEP) and silent period (SP) duration in first dorsal interosseous (FDI) muscle were obtained using transcranial magnetic stimulation (TMS) while the participant maintained the “easy” or “difficult” static task. An 11.8% increase in MEP amplitude was observed when subjects undertook the “difficult” task, but no differences in MEP latency or SP duration. The results from this preliminary study suggest that cortical excitability increases reflect the demand required to perform tasks requiring greater precision with suggestions for further research discussed.

Securing the oral tradition : reflective positioning and professional conversations in midwifery education

We postulate that positioning is a powerful tool in guiding and transforming student professional learning and practice development. In our experiences with students enrolled in he Graduate Diploma of Midwifery, we determined that positioning elaborates individual scholarship and identity formation of the learner midwife in practice settings. Positioning Theory, developed by Harré and other authorities, is a psycho-sociological 'ontology' or concept of how individuals metaphorically position or locate themselves, and others, within institutions and societies. Three key components of positioning theory include 'position', 'speech act' and 'storylines', developing from the everyday social interactions of professional conversations. Reflective positioning can be applied as an analytical tool for the moment-to- moment exchanges inherent in practice related conversations, occurring between midwives and midwifery students. These moment-to-moment interactions of professional conversations can be used by students to complete or fill their learning gaps. Positioning therefore, provides a novel, contemporary theoretical framework to 'unpack' or understand the complexity of midwifery practice and yet is complementary with reflective practice. Excerpts are used to demonstrate reflective positioning applications by students. Midwives are encouraged by health services and by the University to provide student support through a 'preceptorship' program to supervise, work with and assess students for competence in midwifery practices. We claim that reflective positioning by students within professional conversations with their preceptor/midwives, are the construction sites for learning and where identity formation of each student as a future midwife is both shaped and transformed. Both academics and managers of health services need to embrace the value of workplace conversations, the sites of rich oral traditions of nursing and midwifery. Thus, in seeking claim to our rich oral traditions, all students will benefit from engagement in reflective positioning to promote their professional learning and practice development.

Accuracy and precision assesment of stochastic simulation tools for springback variation

The sheet forming industry is plagued by inherent variations in its many input variables, making quality control and improvements a major hurdle. This is particularly poignant for Advanced High Strength Steels (AHSS), which exhibit a large degree of property variability. Current FE-based simulation packages are successful at predicting the manufacturability of a particular sheet metal components, however, due to their numerical deterministic nature are inherently unable to predict the performance of a real-life production process. Though they are now beginning to incorporate the stochastic nature of production in their codes. This work investigates the accuracy and precision of a current stochastic simulation package, AutoForm Sigma v4.1, by developing an experimental data set where all main sources of variation are captured through precise measurements and standard tensile tests. Using a Dual Phase 600Mpa grade steel a series of semi-cylindrical channels are formed at two Blank Holder Pressure levels where the response metric is the variation in springback determined by the flange angle. The process is replicated in AutoForm Sigma and an assessment of accuracy and precision of the predictions are performed. Results indicate a very good correspondence to the experimental trials, with mean springback response predicted to within 1 ° of the flange angle and the interquartile spread of results to within 0.22°.

Lateral positioning for critically ill adult patients

We aim to assess the effect of the lateral position compared to other body positions on patient outcomes (mortality, morbidity and clinical adverse events during and following positioning) in critically ill adult patients. We will examine the single use of the lateral position (that is on the right or left side) and repeat use of the lateral position(s) in a positioning schedule (that is lateral positioning). We plan to undertake subgroup analysis for primary disease and condition, severity of illness, the presence of assisted ventilation and angle of lateral rotation.

An illustration of variable precision rough set theory : The gender classification of the European barn swallow (Hirundo rustica)

This paper introduces a new technique in the investigation of object classification and illustrates the potential use of this technique for the analysis of a range of biological data, using avian morphometric data as an example. The nascent variable precision rough sets (VPRS) model is introduced and compared with the decision tree method ID3 (through a ‘leave n out’ approach), using the same dataset of morphometric measures of European barn swallows (Hirundo rustica) and assessing the accuracy of gender classification based on these measures. The results demonstrate that the VPRS model, allied with the use of a modern method of discretization of data, is comparable with the more traditional non-parametric ID3 decision tree method. We show that, particularly in small samples, the VPRS model can improve classification and to a lesser extent prediction aspects over ID3. Furthermore, through the ‘leave n out’ approach, some indication can be produced of the relative importance of the different morphometric measures used in this problem. In this case we suggest that VPRS has advantages over ID3, as it intelligently uses more of the morphometric data available for the data classification, whilst placing less emphasis on variables with low reliability. In biological terms, the results suggest that the gender of swallows can be determined with reasonable accuracy from morphometric data and highlight the most important variables in this process. We suggest that both analysis techniques are potentially useful for the analysis of a range of different types of biological datasets, and that VPRS in particular has potential for application to a range of biological circumstances.

Spurious precision : variability in procedural validity of diagnostic procedures in psychotic disorders and implications for research and treatment

Very few studies have quantified the level of agreement among alternative diagnostic procedures that use a common set of fixed operational criteria. The authors examined the procedural validity of four independent methods of assigning DSM-III-R diagnoses of psychotic disorders. METHOD: The research was conducted as a satellite study to the DSM-IV Field Trial for Schizophrenia and Related Psychotic Disorders. The setting was the National Health and Medical Research Council Schizophrenia Research Unit's Early Psychosis Prevention and Intervention Centre, which focuses on first-episode psychosis. Consecutively admitted patients (N = 50) were assessed by independent raters who used four different procedures to determine a DSM-III-R diagnosis. These procedures were 1) the diagnostic instrument developed for the DSM-IV field trial, 2) the Royal Park Multidiagnostic Instrument for Psychosis, 3) the Munich Diagnostic Checklists, and 4) a consensus DSM-III-R diagnosis assigned by a team of clinician researchers who were expert in the use of diagnostic criteria. RESULTS: Concordance between pairs of diagnostic procedures was only moderate. Corresponding levels of percent agreement, however, ranged from 66% to 76%, with converse misclassification rates of 24%-34% (assuming one procedure to be "correct"). CONCLUSIONS: These findings have significant research and clinical implications. Despite the introduction of operationally defined diagnoses, there remained an appreciable level of differential classification or misclassification arising from variability in the method of assigning the diagnostic criteria rather than the criteria themselves. Such misclassification may impede neurobiological research and have harmful clinical effects on patients with first-episode psychosis.