Clegg hammer measures and human external landing forces : is there a relationship?

Ground hardness is deemed an important consideration for player safety for sports played on natural turf surfaces. Currently, a ground hardness measure is being determined using a Clegg hammer, with the suitability for play dependent on an acceptable reading. This study aimed to examine whether a relationship between Clegg hammer readings and ground reaction forces (GRF’s) generated by a human during a drop landing exist. Fifteen male community level Australian football players were recruited for the study. Participants performed a single leg drop landing on the right leg from a 45cm box onto the force plate to record GRF’s. Ten trials were conducted for three conditions: no shock pad, thin shock pad (15mm) and thick shock pad (50mm) under a synthetic turf sample. Four consecutive Clegg hammer readings were recorded following each set of ten trials. Variables of interest were maximum vertical GRF (Max vGRF), maximum rate of loading (Max RoL) and Clegg hammer (CH) readings. Pearson’s Correlation Coefficient was conducted to examine the relationship between variables and conditions. Slight to fair relationships were found between the Max vGRF and any of the four CH drops (0.181 ≤r≥ 0.189; p ≤ 0.01). This finding was similar to the relationship with Max RoL (0.209 ≤r≥ 0.217; p ≤ 0.01). When analysed for the specific shock pad condition, the relationships remained poor (r <0.1; p ≥ 0.29), with the exception of the Max RoL and the CH readings on the thick shock pad (0.1 ≤r≥ 0.2; p ≥ 0.03). The results of this study show that the ground reaction forces experienced by a human on different levels of surface hardness are significantly different to the forces on impact of the Clegg hammer. Consequently, the Clegg hammer may not be the most appropriate device for relating surface hardness to player safety, thus it is possible that the Clegg hammer alone is insufficient in globally determining ground safety.

The relationship between pre-sale price estimates and the hammer price for Australian paintings sold at auction

Realized price for paintings auctioned can systematically differ from prior estimates. We need to understand why experts get it wrong. This paper uses an econometric approach to investigate how pre-sales price estimates are formed and the impact that they have in determining auction prices for Australian paintings.

Implemetation of electronic commerce and human resource strategies in an Australian retail banking context

As organisations deploy eCommerce and internet technologies for competitive advantage and to satisfy increasingly demanding customers, they will need to develop human resource (HR) strategies that prepare their employees to work with these technologies effectively. Little systematic investigation has been undertaken to discover how companies manage their HR functions to achieve these outcomes. In the retail banking sector these issues have become very important with increased competition, industry changes and heightened competition. This paper examines HR management strategy in one Australian bank as it moves towards online service provision and adopts other eCommerce applications. The paper draws on theoretical insights from Porter’s (2001) views of competitive advantage from the internet and writers discussing the informational society (Castells, 2001) and post-fordist organisations (Clegg, 1990). An analysis of interview data from this case study shows the issues that one bank is dealing with as it seeks competitive advantage from its customer service offerings while it revises its HR strategies.

Excess and mimesis in organization theory: emancipation from within?

In organizational analysis it can be argued that 'radical separatism'—in the guise of the original 'agenda' for Radical Organization Theory (see Benson, 1977a; Burrell and Morgan, 1979; Clegg and Dunkerley, 1980) or more recently that for Critical Management Studies (see Alvesson and Willmott, 1992; Fournier and Grey, 2000; Casey, 2002; Grey, 2004)—has failed to breach the hegemony of functionalist orthodoxy, and notably so when it comes to practice. Given this failure, we speculate, upon the potential for a different emancipatory approach, one based theoretically on the fluid process of 'undecidability'. Unusually our approach attempts to undermine the conventions of functionalist organization theory from within. In brief, we speculate upon the adoption and enactment of Luce Irigaray's (1985, 1991) strategy of mimicry as a means to illuminate the notion of 'excess' in organization theory. To liberate the feminine, Irigaray mimics the symbolic representation of the female body to excess so as to expose the contradictions of phallocentric discourse. When applied to organization theory, this sees a deliberate mimicking of critiques of radical separatism so as to make explicit the latter's imprisonment within functionalism. Through excessive mimicking of the functionalists' critique, the radical/critical organization theorist may become cognizant of, but perhaps not so subjugated by, the hegemony of functionalist discourse.

Rock strength : a control of shore platform elevation

This study determined whether a previous laboratory finding relating platform elevation to rock strength could be verified when tested in the field. Testing took place along the Otway coast in southeastern Australia. Fourteen platforms were profiled using a total station while rock strength tests were performed with a type L Schmidt hammer. Results established that higher mean platform elevation correlated with increased rock strength (r = 0.661, p < 0.05). This confirmed that a relation exists between elevation and rock strength when tested in the field. This finding has implications for the interpretation of shore platforms and marine terrace elevations in relation to sea level.

Retribution, deterrence and reform : the dilemmas of plagiarism management in universities

Universities face constant scrutiny about their plagiarism management strategies, policies and procedures. A resounding theme, usually media inspired, is that plagiarism is rife, unstoppable and university processes are ineffectual in its wake. This has been referred to as a 'moral panic' approach (Carroll & Sutherland-Smith, forthcoming; Clegg, 2007) and suggests plagiarism will thwart all efforts to reclaim academic integrity in higher education. However, revisiting the origins of plagiarism and exploring its legal evolution reveals that legal discourse is the foundation for many plagiarism management policies and processes around the world. Interestingly, criminal justice aims are also reflected in university plagiarism management strategies. Although universities strive for deterrence of plagiarism in a variety of ways, the media most often calls for retribution through increasingly tougher penalties. However, a primary aim of the justice system, sustainable reform, is not often reported in the media or visible in university policies or processes. Using critical discourse analysis, this paper examines the disjunction between media calls for increased retribution in the wake of moral panic and institutional responses to plagiarism. I argue that many universities have not yet moved to sustainable reform in plagiarism management.

Effects of replication on measured S-N curves of metals

Replication, or repeated tests at the same stress amplitude, is used to provide statistical confidence in life data during the development of S-N curves. This paper discusses the effects of replication on the measurement of S-N curves and presents an alternative to traditional replication methods for the determination of S-N curves, particularly for the development of preliminary S-N curves. Using specimens made out of the extruded bars of a magnesium alloy, it is demonstrated that the S-N curve estimated using the data from non-replication tests is almost same as that from replication tests. The advantage of using non-replication fatigue tests is that it uses fewer specimens, in this instance, only half of that required for 50% replication fatigue test, to achieve the same estimation as that of the replication fatigue tests. Another advantage of using non-replication fatigue tests is that it can detect the non-linearity using limited specimens.

Effects of replication on measured S-N curves of metals

Replication, or repeated tests at the same stress amplitude, is used to provide statistical confidence in life data during the development of S-N curves. This paper discusses the effects of replication on the measurement of S-N curves and presents an alternative to traditional replication methods for the determination of S-N curves, particularly for the development of preliminary S-N curves. Using specimens made out of the extruded bars of a magnesium alloy, it is demonstrated that the S-N curve estimated using the data from non-replication tests is almost same as that from replication tests. The advantage of using non-replication fatigue tests is that it uses fewer specimens, in this instance, only half of that required for 50% replication fatigue test, to achieve the same estimation as that of the replication fatigue tests. Another advantage of using non-replication fatigue tests is that it can detect the non-linearity using limited specimens.

Novel dithiolene complexes incorporating conjugated electroactive ligands

A series of new metal (M) dithiolene complexes bearing terthiophene (3, 12, M = Ni; 4, M = Pd; 5, 6, M = Au) and 2,5-bis(para-methoxyphenyl)thiophene units (14, M = Ni; 15, 16, M = Au; 17, M = Pd) have been synthesised in 38–99% yield. The electrochemical properties of the materials have been characterised by cyclic voltammetry and UV-vis spectroelectrochemistry. The nickel complexes possess low oxidation potentials (−0.12 to −0.25 V vs Ag/AgCl) due to the electron-rich dithiolene centres and all complexes display ligand-based redox activity. The terthiophene derivatives have been polymerised by electrochemical oxidation to give stable films with, in the case of poly(3), broad absorption characteristics. Charge transfer materials have been isolated from 14 and 16 with conductivities in the range 9 × 10⁻⁶ to 7 × 10⁻⁸ S cm⁻¹.

Incorporation of fused tetrathiafulvalenes (TTFs) into polythiophene architectures : varying the electroactive dominance of the TTF species in hybrid systems

A novel polythienylenevinylene (PTV) and two new polythiophenes (PTs), featuring fused tetrathiafulvalene (TTF) units, have been prepared and characterized by ultraviolet−visible (UV−vis) and electron paramagnetic resonance (EPR) spectroelectrochemistry. All polymers undergo two sequential, reversible oxidation processes in solution. Structures in which the TTF species is directly linked to the polymer backbone (2 and 4) display redox behavior which is dictated by the fulvalene system. Once the TTF is spatially removed from the polymer chain by a nonconjugated link (polymer 3), the electroactivity of both TTF and polythiophene moieties can be detected. Computational studies confirm the delocalization of charge over both electroactive centers (TTF and PT) and the existence of a triplet dication intermediate. PTV 4 has a low band gap (1.44 eV), is soluble in common organic solvents, and is stable under ambient conditions. Organic solar cells of polymer 4:[6,6]-phenyl-C₆₁ butyric acid methyl ester (PCBM) have been fabricated. Under illumination, a photovoltaic effect is observed with a power conversion efficiency of 0.13% under AM1.5 solar simulated light. The onset of photocurrent at 850 nm is consistent with the onset of the π−π absorption band of the polymer. Remarkably, UV−vis spectroelectrochemistry of polymer 4 reveals that the conjugated polymer chain remains unchanged during the oxidation of the polymer.