Statistical analysis of reduction in tensile strength of cotton strips as a measure of soil microbial activity

The cotton strip assay (CSA) is an established technique for measuring soil microbial activity. The technique involves burying cotton strips and measuring their tensile strength after a certain time. This gives a measure of the rotting rate, R, of the cotton strips. R is then a measure of soil microbial activity. This paper examines properties of the technique and indicates how the assay can be optimised. Humidity conditioning of the cotton strips before measuring their tensile strength reduced the within and between day variance and enabled the distribution of the tensile strength measurements to approximate normality. The test data came from a three-way factorial experiment (two soils, two temperatures, three moisture levels). The cotton strips were buried in the soil for intervals of time ranging up to 6 weeks. This enabled the rate of loss of cotton tensile strength with time to be studied under a range of conditions. An inverse cubic model accounted for greater than 90% of the total variation within each treatment combination. This offers support for summarising the decomposition process by a single parameter R. The approximate variance of the decomposition rate was estimated from a function incorporating the variance of tensile strength and the differential of the function for the rate of decomposition, R, with respect to tensile strength. This variance function has a minimum when the measured strength is approximately 2/3 that of the original strength. The estimates of R are almost unbiased and relatively robust against the cotton strips being left in the soil for more or less than the optimal time. We conclude that the rotting rate X should be measured using the inverse cubic equation, and that the cotton strips should be left in the soil until their strength has been reduced to about 2/3.

Using the Gini coefficient with BIOLOG substrate utilisation data to provide an alternative quantitative measure for comparing bacterial soil communities

A measure quantifying unequal use of carbon sources, the Gini coefficient (G), has been developed to allow comparisons of the observed functional diversity of bacterial soil communities. This approach was applied to the analysis of substrate utilisation data obtained from using BIOLOG microtiter plates in a study which compared decomposition processes in two contrasting plant substrates in two different soils. The relevance of applying the Gini coefficient as a measure of observed functional diversity, for soil bacterial communities is evaluated against the Shannon index (H) and average well colour development (AWCD), a measure of the total microbial activity. Correlation analysis and analysis of variance of the experimental data show that the Gini coefficient, the Shannon index and AWCD provided similar information when used in isolation. However, analyses based on the Gini coefficient and the Shannon index, when total activity on the microtiter plates was maintained constant (i.e. AWCD as a covariate), indicate that additional information about the distribution of carbon sources being utilised can be obtained. We demonstrate that the Lorenz curve and its measure of inequality, the Gini coefficient, provides not only comparable information to AWCD and the Shannon index but when used together with AWCD encompasses measures of total microbial activity and absorbance inequality across all the carbon sources. This information is especially relevant for comparing the observed functional diversity of soil microbial communities.

Supreme Court Act 1995 s48 - Interest on judgment for damages for personal injuries

The case of Flynn v The Maryborough Sugar Factory Limited [2003] QDC 446 the plaintiff had been awarded damages for personal injuries and there was a charge on those damages under a Commonwealth statute, with a provision in the statute that damages could not be satisfied until the Commonwealth had been paid. The Court considered the point of considerable practical significance of whether interest accrued on the judgment under s48 of the Supreme Court Act 1995 (Qld) before the defendant had obtained clearances under the Commonwealth legislation.

Damages for personal injuries in Queensland : interest please!

The article revises established principles relating to the awarding of damages to the date of judgment and discusses decisions in the High Court and in the Supreme Court of Queensland which have caused significant changes to the manner of assessments of interest. Its purpose is to provide for practitioners involved in personal injuries litigation in Queensland a current set of guidelines as to the manner in which the wide discretion to award interest may be expected to be exercised.

Personal injuries sustained in the course of employment - claim against employer under Workcover Queensland Act 1996

In Devlin v South Mole Island Resort [2003] QSC 020 the Court concluded the applicant was entitled to pursue a concurrent claim he alleged he had against the respondent under the Personal Injuries Proceedings Act 2002 in respect of injuries sustained in the course of employment, and also that the Workcover Queensland Act 1996 did not abolish the applicant's right to proceed against the respondent.

Practice and Procedure - Proceedings claiming damages for personal injuries commenced before June 18, 2002

In Inglis v Connell [2003] QDC 029 the court considered s6(3) of the Personal Injuries Proceedings Act 2002 in relation to the application of the Act. The conclusion reached was that the provision should be interpreted as providing that the requirements of the Act do not apply in respect of personal injury the subject of any proceeding commenced before June 18, 2002.

Evaluating the use of ambient and tangible interaction approaches for personal indoor climate preferences [Extended Abstract]

In this paper we describe the preliminary results of a field study which evaluated the use of MiniOrb, a system that employs ambient and tangible interaction mechanisms to allow inhabitants of office environments to report on subjectively perceived office comfort levels. The purpose of this study was to explore the role of ubiquitous computing in the individual control of indoor climate and specifically answer the question to what extent ambient and tangible interaction mechanisms are suited for the task of capturing individual comfort preferences in a non-obtrusive manner. We outline the preliminary results of an in-situ trial of the system.

Planning to Learn : Creating and Using a Personal Planner with Young People on the Autism Spectrum

Late intervention often means that young people on the autism spectrum appear to act on impulse, seem disorganized, or fail to learn from past experiences. In this practical, effective resource, the authors share tried and tested techniques for creating and using a personal planner to help individuals on the autism spectrum to develop independence. "Planning to Learn" is split into three parts. The first part guides adults in helping young people to make sense of the world and to develop and practise coping strategies for any given situation. The authors also explain how simple visual and verbal cues can help people to cope successfully in stressful situations. The second part provides worksheets for the young person to complete to learn how to use plans in different situations, for example staying calm when waiting for a doctor, or coping with a change in the school timetable. Each individual makes a unique planner with procedures to refer to, such as responding to pressure, calming down, being organised, and being around people. The third part includes useful cards, schedules and plans for photocopying and including in the planner. This illustrated photocopiable workbook is packed with guidance, support and helpful notes for those new to, or experienced in, working with children and young people with ASD. It can be used within educational and community settings or at home.

Effect of ion current density on the properties of vacuum arc-deposited TiN coatings

The influence of ion current density on the thickness of coatings deposited in a vacuum arc setup has been investigated to optimize the coating porosity. A planar probe was used to measure the ion current density distribution across plasma flux. A current density from 20 to 50 A/m2 was obtained, depending on the probe position relative to the substrate center. TiN coatings were deposited onto the cutting inserts placed at different locations on the substrate, and SEM was used to characterize the surfaces of the coatings. It was found that lowdensity coatings were formed at the decreased ion current density. A quantitative dependence of the coating thickness on the ion current density in the range of 20-50 A/m2 were obtained for the films deposited at substrate bias of 200 V and nitrogen pressure 0.1 Pa, and the coating porosity was calculated. The coated cutting inserts were tested by lathe machining of the martensitic stainless steel AISI 431. The results may be useful for controlling ion flux distribution over large industrial-scale substrates.

Assessment of damages for defamation of business and personal reputation

An award of damages for defamation is to provide reparation for harm to a plaintiff’s reputation for the publication of defamatory material, compensate for any personal distress caused and vindicate the plaintiff’s reputation.1 Assessing such damages is recognised as a difficult task and perhaps the Queensland courts face further difficulties as there are few awards of damages for defamation in the state. This was pointed out in the recent decision of the Queensland Court of Appeal, Cerutti & Anor v Crestside Pty Ltd & Anor.2 This decision examined in detail the principles of assessing damages for defamation.

A comparison of factors influencing perceived risk by French and Australian cyclists and drivers

Differences in the levels of risk perceived by cyclists and car drivers may contribute to the dangers in their interactions. Levels of perceived risk have been shown to vary according to personal and environmental factors and between countries. Cycling rates in France are higher than in Australia, particularly among women. This study investigated whether cultural differences between France and Australia are reflected in perceived risks for experienced adult cyclists and drivers in the two countries. In online surveys, regular cyclists (France 336, Australia 444) and drivers (France 92, Australia 151) were asked to rate the level of risk in six situations: failure to yield; going through a red light; not signalling when turning; swerving; tail-gating; and not checking traffic. The effects of type of interacting vehicle and participant type on perceived risk were similar in France and Australia. However, the influence of responsibility for the risky behaviour differed according to participant type, type of situation and nationality. When the bicycle rider committed the road rule violation, Australian cyclists and drivers gave higher risk ratings than French cyclists and drivers. In both countries, cyclists rated themselves significantly higher than drivers on the perceived control and overconfidence subscales of the perceived skill measure. The French cyclists rated themselves higher than Australian cyclists on these scales, which could be responsible for overall lower perceived risk levels when interacting with a bike. Australian cyclists rated themselves significantly lower than drivers on the incompetence subscale but French cyclists rated themselves higher than drivers. In both countries incompetence scores were positively related to levels of perceived risk. Weekly time was associated with perceived risk in Australia but not in France. Frequency of traffic violations was not associated with perceived risk in either country. In conclusion, levels of perceived risk differed between drivers and cyclists in both countries and were influenced by type of interacting vehicle, experience and perceived skill. However, some differences between the results from the two countries merit further investigation to shed light on potential improvements in safety and cycling participation.

The Proposed Commonwealth Personal Property Securities Act 2008

Inspired by similar reforms introduced in New Zealand, Canada and the United States, the Commonwealth, with the co-operation of the States, seeks in the Personal Property Securities Bill 2008 (the Bill) to introduce a central repository of recorded information reflecting particular security interests in personal property in Australia. Specifically, the interest recorded is an interest in personal property provided for by a transaction that in substance secures the payment or the performance of an obligation. In addition to providing a notification of the use of the personal property as collateral to secure the payment of monies or the performance of an obligation, the Bill proposes to introduce a regime of prioritising interests in the same collateral. Central to this prioritisation are the concepts of a ‘perfected security interests’and ‘unperfected security interests’. Relevantly, a perfected security interest in collateral has priority over an unperfected security interest in the same collateral. The proposed mechanisms rely on the fundamental integer of personal property, which is defined as any property other than land. Recognising that property may take a tangible as well as an intangible form, the Bill reflects an appreciation of the fact that some property may have a tangible form which may act as collateral, and simultaneously the same property may involve other property, intangible property in the form of intellectual property rights, which in their own right may be the subject of a‘security agreement’. An example set out in the Commentary on the Consultation Draft of the Bill (the Commentary), indicates the practical implications involving certain property which have multiple profiles for the purposes of the Bill. This submission is concerned with the presumptions made in relation to the interphase between tangible property and intangible property arising from the same personal property, as set out in s 30 of the Bill.

The lily, client and measure of Bruno Taut’s Glashaus

The Glashaus is considered a significant exemplar of early modernist architecture and is generally accepted as having had Expressionist origins. However, current research has revealed that the design origins of this important building are not fully understood. While the historical record acknowledges the contributions of the bohemian poet Paul Scheerbart and the art critic Adolf Behne, the role of the Glashaus’ architect, Bruno Taut, has been moderated. In an attempt to rectify this situation this article proposes that the design origins of the Glashaus can be found in a strong architect-client interaction. It is argued that the Glashaus’ client, the Deutsche Luxfer Prismen Syndikat under the directorship of Frederick Keppler, exerted a significant influence on its design. In order to showcase the glazed products of Luxfer in the best manner possible, Keppler insisted that the design feature a glazed dome, electric lighting, a fountain as well as a cascade. Given the detailed stipulations of this brief, Taut had few options other than to offer interpretations of precedent that derived from the Victoria regia lily and Gothic proportioning. By expounding this architect-client relationship, this article expands our understanding of the Glashaus, and reinvigorates our understanding of this important early example of modern architecture.