Leadership Stereotypes and Styles of Female Singaporean Principals

This paper investigates how a sample of female Singaporean secondary school principals perceived their leadership styles and compares their responses to a similar study carried out recently of female English head teachers. The education systems of England and Singapore are quite different. The English environment allows schools significant autonomy in personnel management and the majority of head teachers and senior managers are male. In contrast, the Singaporean educational environment is quite centralized, including the management of career paths, and the proportion of female senior managers is much higher. Interviews were conducted with 11 female Singaporean principals to identify their styles of management, leadership perspectives, and attitudes. The discussion first focuses on whether or not the styles of the principals in relation to ‘masculine’ or feminine’ stereotypes of leadership were similar to those of the English head teachers. Further comparison is made of the leadership attributes of the two sets of principals, including styles of management, decision‐making, working environment, need for vision, and values.     

An Educational Imperative: The Role of Ethical Codes and Normative Prohibitions in CBW-applicable Research

This paper examines the role of ethics in research with potentialapplicability to chemical and biological warfare. It focuses uponbiological warfare research, and examines the ethical dilemmas faced bythose working with dual-use potential technologies. It discusses thenormative, legal and ethical prohibitions against participation inchemical and biological warfare programmes from a Western perspective.It examines the motivations of individuals participating in CBW researchand concludes with recommendations for increasing awareness aboutethical and normative prohibitions. An appendix lists the results of asurvey of ethical codes in relevant scientific disciplines conducted viathe Internet.     

Improvement of rectification effects in diffuser/nozzle structures with viscoelastic fluids

This paper reports the improvement of rectification effects in diffuser∕nozzle structures with viscoelastic fluids. Since rectification in a diffuser∕nozzle structure with Newtonian fluids is caused by inertial effects, micropumps based on this concept require a relatively high Reynolds numbers and high pumping frequencies. In applications with relatively low Reynolds numbers, anisotropic behavior can be achieved with viscoelastic effects. In our investigations, a solution of dilute polyethylene oxide was used as the viscoelastic fluid. A microfluidic device was fabricated in silicon using deep reactive ion etching. The microfluidic device consists of access ports for pressure measurement, and a series of ten diffuser∕nozzle structures. Measurements were carried out for diffuser∕nozzle structures with opening angles ranging from 15° to 60°. Flow visualization, pressure drop and diodicity of de-ionized water and the viscoelastic fluid were compared and discussed. The improvement of diodicity promises a simple pumping concept at low Reynolds numbers for lab-on-a-chip applications.     

Raised parental expectations towards higher education and the double bind

This paper is concerned with the participation of students from low socio-economic status (SES) families and communities in Australian higher education. One means of achieving this, as purported by the Australian Government and various universities, is through the raising of family aspirations or expectations. In this paper, I explore the localised effects of raised family aspirations as they are understood within the lived experiences of some students from a low SES context. Based on the interactions in four focus groups of eight participants and five follow-up individual interviews run in a low SES school in Western Sydney, I draw broadly on the method advanced by Giorgi [1985. Phenomenology and psychological research. Pittsburgh, PA: Duquesne University Press] to attend to how certain forms of high expectations communicated by parents may have a deleterious effect on student aspiration and attainment insofar as it positions the latter in a ‘double bind’. Such a situation can be inferred to significantly reduce the incentives for higher education participation.     

Surface protein gradients generated in sealed microchannels using spatially varying helium microplasma

Spatially varied surface treatment of a fluorescently labeled Bovine Serum Albumin (BSA) protein, on the walls of a closed (sealed) microchannel is achieved via a well-defined gradient in plasma intensity. The microchips comprised a microchannel positioned in-between two microelectrodes (embedded in the chip) with a variable electrode separation along the length of the channel. The channel and electrodes were 50 μm and 100 μm wide, respectively, 50 μm deep, and adjacent to the channel for a length of 18 mm. The electrode separation distance was varied linearly from 50 μm at one end of the channel to a maximum distance of 150, 300, 500, or 1000 μm to generate a gradient in helium plasma intensity. Plasma ignition was achieved at a helium flow rate of 2.5 ml/min, 8.5 kV_pk-pk, and 10 kHz. It is shown that the plasma intensity decreases with increasing electrode separation and is directly related to the residual amount of BSA left after the treatment. The plasma intensity and surface protein gradient, for the different electrode gradients studied, collapse onto master curves when plotted against electrode separation. This precise spatial control is expected to enable the surface protein gradient to be tuned for a range of applications, including high-throughput screening and cell-biomolecule-biomaterial interactions.     

Convergent validity of a novel method for quantifying rowing training loads

Elite rowers complete rowing-specific and non-specific training, incorporating continuous and interval-like efforts spanning the intensity spectrum. However, established training load measures are unsuitable for use in some modes and intensities. Consequently, a new measure known as the T2minute method was created. The method quantifies load as the time spent in a range of training zones (time-in-zone), multiplied by intensity- and mode-specific weighting factors that scale the relative stress of different intensities and modes to the demands of on-water rowing. The purpose of this study was to examine the convergent validity of the T2minute method with Banister’s training impulse (TRIMP), Lucia’s TRIMP and Session-RPE when quantifying elite rowing training. Fourteen elite rowers (12 males, 2 females) were monitored during four weeks of routine training. Unadjusted T2minute loads (using coaches’ estimates of time-in-zone) demonstrated moderate-to-strong correlations with Banister’s TRIMP, Lucia’s TRIMP and Session-RPE (rho: 0.58, 0.55 and 0.42, respectively). Adjusting T2minute loads by using actual time-in-zone data resulted in stronger correlations between the T2minute method and Banister’s TRIMP and Lucia’s TRIMP (rho: 0.85 and 0.81, respectively). The T2minute method is an appropriate in-field measure of elite rowing training loads, particularly when actual time-in-zone values are used to quantify load.