Showing papers by "Queensland University of Technology published in 2000"

Environmental lead exposure: a public health problem of global dimensions

Abstract: Lead is the most abundant of the heavy metals in the Earth’s crust. It has been used since prehistoric times, and has become widely distributed and mobilized in the environment. Exposure to and uptake of this non-essential element have consequently increased. Both occupational and environmental exposures to lead remain a serious problem in many developing and industrializing countries, as well as in some developed countries. In most developed countries, however, introduction of lead into the human environment has decreased in recent years, largely due to public health campaigns and a decline in its commercial usage, particularly in petrol. Acute lead poisoning has become rare in such countries, but chronic exposure to low levels of the metal is still a public health issue, especially among some minorities and socioeconomically disadvantaged groups. In developing countries, awareness of the public health impact of exposure to lead is growing but relatively few of these countries have introduced policies and regulations for significantly combating the problem. This article reviews the nature and importance of environmental exposure to lead in developing and developed countries, outlining past actions, and indicating requirements for future policy responses and interventions.

What is ERP

Abstract: Though enterprise resource planning (ERP) has gained some prominence in the information systems (IS) literature over the past few years and is a significant phenomenon in practice, through (a) historical analysis, (b) meta-analysis of representative IS literature, and (c) a survey of academic experts, we reveal dissenting views on the phenomenon. Given this diversity of perspectives, it is unlikely that at this stage a broadly agreed definition of ERP can be achieved. We thus seek to increase awareness of the issues and stimulate further discussion, with the ultimate aim being to: (1) aid communication amongst researchers and between researchers and practitioners; (2) inform development of teaching materials on ERP and related concepts in university curricula and in commercial education and training; and (3) aid communication amongst clients, consultants and vendors. Increased transparency of the ERP-concept within IS may also benefit other aligned fields of knowledge.

Guidelines of Business Process Modeling

Abstract: Process modeling becomes more and more an important task not only for the purpose of software engineering, but also for many other purposes besides the development of software. Therefore it is necessary to evaluate the quality of process models from different viewpoints. This is even more important as the increasing number of different end users, different purposes and the availability of different modeling techniques and modeling tools leads to a higher complexity of information models. In this paper the Guidelines of Modeling (GoM)1, a framework to structure factors for the evaluation of process models, is presented. Exemplary, Guidelines of Modeling for workflow management and simulation are presented. Moreover, six general techniques for adjusting models to the perspectives of different types of user and purposes will be explained.

New Venture Survival: Ignorance, External Shocks, and Risk Reduction Strategies

Abstract: Although scholars have long recognized the increased mortality risk that new ventures face in terms of a "liability of newness," most of the discussion around this risk has been in terms of the contextual constraints that new ventures face and the difficulties that managers have in overcoming them. This emphasis is in part a reflection of the perils of newness but also stems from the retrospective and aggregate perspective taken by researchers. Although the macro-level perspective of new venture mortality has made a significant contribution to our knowledge of mortality risk patterns, there has been little interest in identifying how venture managers can address the risks that all new organizations face. We argue that in order to make progress in explaining new venture survival, a theoretical model is required that uses a more micro-level perspective to explain new venture failure (and the flip side, new venture survival). In this paper we develop such a model. We establish a definition of mortality risk and argue that the liability of newness is largely dependent on the degree of novelty (ignorance) associated with a new venture. Novelty is viewed in three different dimensions, viz.: to the market, to the technology of production and to management. Novelty to the market concerns the degree to which the customers are uncertain about the new venture. Novelty in production concerns the extent to which the production technology used by the new venture is similar to the technologies in which the production team has experience and knowledge. Novelty to management concerns the entrepreneurial team’s lack of business skills, industry specific information and start-up experience. We argue that mortality risk increases with the degree of novelty in each dimension and with the number of dimensions in which the new venture is novel. We propose that the decline in mortality risk occurs as the venture’s novelty in each of the three dimensions is eroded by information search and dissemination processes. This allows the new firm to become an established business and explains what we term the "evolutionary" path of mortality—novelty and risk decline monotonically, after a period of adolescence, as ignorance decays over time due to ‘passive learning’. We also propose that there is a "strategic" mortality risk path that reflects the impact of positive and negative shocks (shocks are exogenous events that alter the overall degree of novelty at a point in time— positive shocks decrease overall novelty, while negative shocks increase overall novelty) and reversals (endogenous actions that increase the overall novelty of the new venture at a point in time) on the mortality risk of a new venture. If the incidence and effects of these disruptions can be managed, then venture managers may be able to mitigate the mortality risk for their venture. We argue that risk reduction strategies can be employed, most of which impact on one or more of the dimensions of mortality risk in order to increase the firm’s chances of survival. A series of risk reduction strategies are proposed and their impact on the determinants of mortality risk is considered.

Influences On Knowledge processes In Organizational Learning: The Psychosocial Filter

Abstract: This paper reports a segment of broader theory-building case study research exploring organizational learning and knowledge processes in a bio-medical consortium. Its focus is the individual-level factors that influence knowledge processes associated with organizational learning. As we explored how rganizational learning occurred, the underlying knowledge processes came forward as complex and idiosyncratic. In an unanticipated finding, micro-processes emerged as highly influential, with individual perceptions of approachability, credibility and trustworthiness mediating knowledge importing and knowledge sharing activities. We introduce a model –the psychosocial filter– to describe the cluster of micro-processes that were brought forward in the study. Firstly, scientists filtered knowledge porting by deciding whom they would approach for information and from whom they would accept input. The individual’s confidence to initiate information requests (which we termed social confidence) and the perceived credibility of knowledge suppliers both mediated knowledge importing. Secondly, scientists mediated knowledge sharing by actively deciding with whom they would share their own knowledge. Perceived trustworthiness – based on perceptions of what olleagues were likely to do with sensitive information – was the factor that influenced knowledge-sharing decisions. Significantly, the psychosocial filter seemed to constitute a heedful process with high functionality. Its effect was not to block knowledge circulation, but instead to ensure that nowledge-sharing decisions were made in a thoughtful and deliberate way. The psychosocial filter suggests an initial framework for conceptualizing the role that individual-level processes play in organizational knowledge sharing. Building on this, the model provides a platform for more focused exploration of knowledge processes and social relationships in organizational learning.

Genetic and environmental influences on sexual orientation and its correlates in an Australian twin sample

Abstract: We recruited twins systematically from the Australian Twin Registry and assessed their sexual orientation and 2 related traits: childhood gender nonconformity and continuous gender identity. Men and women differed in their distributions of sexual orientation, with women more likely to have slight-to-moderate degrees of homosexual attraction, and men more likely to have high degrees of homosexual attraction. Twin concordances for nonheterosexual orientation were lower than in prior studies. Univariate analyses showed that familial factors were important for all traits, but were less successful in distinguishing genetic from shared environmental influences. Only childhood gender nonconformity was significantly heritable for both men and women. Multivariate analyses suggested that the causal architecture differed between men and women, and, for women, provided significant evidence for the importance of genetic factors to the traits' covariation.

Entrepreneurship as a Utility-Maximizing Response

Abstract: Research on entrepreneurship has investigated what entrepreneurs do, what happens when they act as entrepreneurs, and why they act as entrepreneurs. This paper contributes to the latter investigation, and specifically asks why some people choose to be entrepreneurs, while others choose to be employees. Responding to prior literature recognizing the lack of a coherent theory of entrepreneurship and calling for a rigorous examination of the decision to become an entrepreneur, this paper presents an economic model of the career decision. We postulate that the individual chooses an entrepreneurial career path, or a career as an employee, or some combination of the two, according to which career path promises maximal utility (or psychic satisfaction). We assume that the individual’s utility from any particular occupation, whether self-employed or employed, depends on income (which depends in turn on ability), as well as working conditions such as decision-making control, risk exposure, work effort required, and other working conditions (net perquisites)associated with that occupation. Individuals will exhibit either preference or aversion towards each of the specified working conditions, and it is the degree of that preference or aversion, in conjunction with the quantum of each working condition, which determines the total utility that the individual will derive from each particular occupation. We show that all employees will have an incentive to be self-employed (if they could assemble the same resources as greater will be their incentive to be self-employed, other things being equal. Next, we show that a more positive attitude to work (i.e., a lesser aversion to work effort required) provides a greater incentive to be self-employed. The individual’s degree of risk aversion also influences the choice to be an entrepreneur. The more tolerant one is of risk bearing, the greater the incentive to be self-employed. Similarly, the greater the preference for independence, or decision-making control, the greater the incentive to be self-employed. Finally, it is noted that perquisites (and avoidance of irksome elements) can potentially be controlled to a greater degree when self-employed, so the individual will consider the differences in these other working conditions when contemplating a career choice.

Organisational culture in the public sector: evidence from six organisations

Abstract: A process of organisational change has accompanied managerial reforms in the public sector and is oriented towards the development of a post‐bureaucratic organisational culture. However, there remains a limited empirical understanding of culture in public organisations. Contributes to an understanding of organisational culture in the public sector through survey research that analyses culture by reference to the competing values of internal/external orientation and control/flexibility. Focuses on six organisations in the Queensland public sector which have been encouraged to depart from traditional bureaucratic values and to adopt a greater emphasis on change, flexibility, entrepreneurialism, outcomes, efficiency and productivity. Suggests, however, that public sector organisations continue to emphasise the values of a bureaucratic or hierarchical organisational culture.

Advanced Workflow Patterns

Abstract: Conventional workflow functionality like task sequencing, split parallelism, join synchronization and iteration have proven effective for business process automation and have widespread support in current workflow products. However, newer requirements for workflows are encountered in practice, opening grave uncertainties about the extensions for current languages. Different concepts, although outwardly appearing to be more or less the same, are based on different paradigms, have fundamentally different semantics and different levels of applicability – more specialized for modeling or more generalized for workflow engine posit. By way of developmental insight of new requirements, we define workflow patterns which are described imperatively but independently of current workflow languages. These patterns provide the basis for an in-depth comparison of 12 workflow management systems. As such, the work reported in this paper can be seen as the academic response to evaluations made by prestigious consulting companies. Typically, these evaluations hardly consider the workflow modeling language and routing capabilities and focus more on the purely technical and commercial aspects.

Integrated process modeling: an ontological evaluation

Abstract: Process modeling has gained prominence in the information systems modeling area due to its focus on business processes and its usefulness in such business improvement methodologies as Total Quality Management, Business Process Reengineering, and Workflow Management. However, process modeling techniques are not without their criticisms [13]. This paper proposes and uses the Bunge-Wand-Weber (BWW) representation model to analyze the five views - process, data, function, organization and output - provided in the Architecture of Integrated Information Systems (ARIS) popularized by Scheer [39, 40, 41]. The BWW representation model attempts to provide a theoretical base on which to evaluate and thus contribute to the improvement of information systems modeling techniques. The analysis conducted in this paper prompts some propositions. It confirms that the process view alone is not sufficient to model all the real-world constructs required. Some other symbols or views are needed to overcome these deficiencies. However, even when considering all five views in combination, problems may arise in representing all potentially required business rules, specifying the scope and boundaries of the system under consideration, and employing a top-down approach to analysis and design. Further work from this study will involve the operationalization of these propositions and their empirical testing in the field. (C) 2000 Elsevier Science Ltd. All rights reserved.

On Structured Workflow Modelling

Abstract: While there are many similarities between the languages of the various workflow management systems, there are also significant differences. One particular area of differences is caused by the fact that different systems impose different syntactic restrictions. In such cases, business analysts have to choose between either conforming to the language in their specifications or transforming these specifications afterwards. The latter option is preferable as this allows for a separation of concerns. In this paper we investigate to what extent such transformations are possible in the context of various syntactical restrictions (the most restrictive of which will be referred to as structured workflows). We also provide a deep insight into the consequences, particularly in terms of expressive power, of imposing such restrictions.

Students' conceptions of learning, the classroom environment, and approaches to learning

Abstract: A model that hypothesized relationships between high school students' conceptions of learning, their percpetions of the classroom environment, and their approaches to learning was tested using structural equation modeling. Results suggested that important associations exist between conceptions of learning and approaches to learning. Students who reported qualitative and experiential conceptions were likely to use deep approaches to learning, whereas students who had quantitative conceptions of learning tended to use surface approaches. The implications of these findings for teachers and the way they function in the classroom environment are discussed.

A Short History Of Nitroglycerine And Nitric Oxide In Pharmacology And Physiology

Abstract: 1. Nitroglycerine (NG) was discovered in 1847 by Ascanio Sobrero in Turin, following work with Theophile-Jules Pelouze. Sobrero first noted the 'violent headache' produced by minute quantities of NG on the tongue. 2. Constantin Hering, in 1849, tested NG in healthy volunteers, observing that headache was caused with 'such precision'. Hering pursued NG ('glonoine') as a homeopathic remedy for headache, believing that its use fell within the doctrine of 'like cures like'. 3. Alfred Nobel joined Pelouze in 1851 and recognized the potential of NG. He began manufacturing NG in Sweden, overcoming handling problems with his patent detonator. Nobel suffered acutely from angina and was later to refuse NG as a treatment. 4. During the mid-19th century, scientists in Britain took an interest in the newly discovered amyl nitrite, recognized as a powerful vasodilator. Lauder Brunton, the father of modern pharmacology, used the compound to relieve angina in 1867, noting the pharmacological resistance to repeated doses. 5. William Murrell first used NG for angina in 1876, although NG entered the British Pharmacopoeia as a remedy for hypertension. William Martindale, the pharmaceutical chemist, prepared '...a more stable and portable preparation': 1/100th of a grain in chocolate. 6. In the early 20th century, scientists worked on in vitro actions of nitrate-containing compounds although little progress was made towards understanding the cellular mode of action. 7. The NG industry flourished from 1900, exposing workers to high levels of organic nitrites; the phenomena of nitrate tolerance was recognized by the onset of 'Monday disease' and of nitrate-withdrawal/overcompensation by 'Sunday Heart Attacks'. 8. Ferid Murad discovered the release of nitric oxide (NO) from NG and its action on vascular smooth muscle (in 1977). Robert Furchgott and John Zawadski recognized the importance of the endothelium in acetylcholine-induced vasorelaxation (in 1980) and Louis Ignarro and Salvador Moncada identified endothelial-derived relaxing factor (EDRF) as NO (in 1987). 9. Glycerol trinitrate remains the treatment of choice for relieving angina; other organic esters and inorganic nitrates are also used, but the rapid action of NG and its established efficacy make it the mainstay of angina pectoris relief.

Developing motivation to teach elementary science: Effect of collaborative and authentic learning practices in preservice education

Abstract: The rapid growth in knowledge over recent times has meant that teachers have to be responsive to new and ever changing demands of society. Science is among those key areas of knowledge that has experienced overwhelming growth and thus developing scientific literacy is a priority if citizens are to participate effectively in society. Failure to develop children’s interest in science will disempower a generation of children in an era when scientific knowledge is at the foundation of our culture. Unfortunately, many elementary teachers express a lack of confidence in their ability to teach science with dire consequences for the quality of teaching. This paper reports a study involving a cohort of 161 elementary preservice teachers in the third year of a four-year Bachelor of Education program enrolled in a core science education (methods) course. An instructional program that addressed five essential dimensions of meaningful learning – the knowledge base, metacognition, motivation, individual differences and context – was implemented. Quantitative and qualitative data obtained through surveys, observations and focus session reviews revealed that a learning environment based on social constructivist perspectives was effective in developing students’ conceptual and pedagogical knowledge, and most importantly enhanced students’ sense of science teaching self-efficacy. Particular initiatives that were identified by students as being of value were collaborative learning and associated strategies, reflective journal writing, and assignment tasks that adopted principles of problem based learning. While statistically significant gains in science teaching self-efficacy (p < .001) were observed overall, qualitative data enabled a more detailed analysis of the changes in motivations and goals of individual student teachers. The paper explores how the experiences developed their confidence and will to teach science in elementary school and how opportunities were provided that empowered the student teachers to be proactive seekers of knowledge and become lifelong learners.

Islamic Corporate Reports

Abstract: This article develops a theory about the form and the content of the financial information that should be contained in Islamic financial statements. The theory suggests that the presence of the Islamic religion as a cultural variable affects the way certain accounting measures are interpreted and the manner in which accounting information should be disclosed. Two important criteria for disclosure in Islamic accounting are identified: a form of social accountability and a rule of full disclosure. This leads to a modification of the form of the conventional Western set of financial statements, which are referred to in the paper as Islamic corporate reports (ICRs). The specific recommendations are that ICRs should contain a value-added statement as the focus of performance of the accounting entity and a current value balance sheet in addition to the historic cost balance sheet. It is argued that ICRs, extended in this way, would better serve the needs of users wishing to act in accordance with the Islamic code.

Test liquids for quantitative MRI measurements of self-diffusion coefficient in vivo

Abstract: A range of liquids suitable as quality control test objects for measuring the accuracy of clinical MRI diffusion sequences (both apparent diffusion coefficient and tensor) has been identified and characterized. The self-diffusion coefficients for 15 liquids (3 cyclic alkanes: cyclohexane to cyclooctane, 9 n-alkanes: n-octane to n-hexadecane, and 3 n-alcohols: ethanol to 1-propanol were measured at 15-30 degrees C using an NMR spectrometer. Values at 22 degrees C range from 0.36 to 2.2 10(-9) m(2)s(-1). Typical 95% confidence limits are +/-2%. Temperature coefficients are 1.7-3.2% degrees C. T1 and T2 values at 1.5 T and proton density are given. n-tridecane has a diffusion coefficient close to that of normal white matter. The longer n-alkanes may be useful T2 standards. Measurements from a spin-echo MRI sequence agreed to within 2%.

Development of knowledge about electricity and magnetism during a visit to a science museum and related post-visit activities

Abstract: This article reports on part of a larger study of how 11- and 12-year-old students construct knowledge about electricity and magnetism by drawing on aspects of their experiences during the course of a school visit to an interactive science museum and subsequent classroom activities linked to the science museum exhibits. The significance of this study is that it focuses on an aspect of school visits to informal learning centers that has been neglected by researchers in the past, namely the influence of post-visit activities in the classroom on subsequent learning and knowledge construction. This study provides evidence that the integrated series of post-visit activities resulted in students constructing and reconstructing their personal knowledge of science concepts and principles represented in the science museum exhibits, sometimes toward the accepted scientific understanding and sometimes in different and surprising ways. A descriptive interpretive approach was adopted, with principal data sources comprising student-generated concept maps and semistructured interviews at three stages of the study. Findings demonstrate the interrelationships between learning that occurs at school, home, and in informal learning settings. The study also underscores for classroom teachers and staff of science museums and similar centers the importance of planning pre- and post-visit activities. The importance of this planning is not only to support the development of scientific conceptions, but also to detect and respond to alternative conceptions that may be produced or strengthened during a visit to an informal learning center. © 2000 John Wiley & Sons, Inc. Sci Ed84:658–679, 2000.

Effects of drying on flavour compounds in Australian-grown ginger (Zingiber officinale).

Abstract: The volatile compounds responsible for the flavour of Australian-grown ginger have been extracted using supercritical carbon dioxide. Both fresh and dried ginger samples have been examined and the major effects of the drying process are a reduction in gingerol content, an increase in terpene hydrocarbons and the conversion of some monoterpene alcohols to their corresponding acetates. © 2000 Society of Chemical Industry

The sacrificial HR strategy in call centers

Abstract: Balancing the competing objectives of efficiency and service typically requires management compromises to be made. However, some call centers have found that a compromise is not necessary. By using a “sacrificial HR strategy”, they achieve both efficiency and high levels of service at the same time. This is possible because part of the sacrificial HR strategy is the deliberate, frequent replacement of employees in order to provide enthusiastic, motivated customer service at low cost to the organization. Describes a multiple‐case analysis of four call centers and the sacrificial HR strategy they used. The contingencies leading to the appearance of this strategy are discussed.

Attitudes Toward Disability: teacher education for inclusive environments in an Australian university

Abstract: The Interaction with Disabled Persons Scale (IDP) was used to explore the attitudes of preservice teachers at a large Australian University to people with disabilities. Using structural equation mo...

Patients' perceptions of seclusion: a qualitative investigation.

Abstract: Twelve patients receiving acute in-patient psychiatric care in Queensland, Australia, participated in semi-structured interviews to elicit their perceptions of seclusion. All respondents had experienced time in seclusion within the 7 days prior to interview. Interviews were audiotaped, transcribed and analysed using content analysis. Five major themes emerged: use of seclusion, emotional impact, sensory deprivation, maintaining control and staff-patient interaction. The prevailing negativity towards seclusion underscores the need for ongoing critical review of its use. In particular, the relationship between patient responses to seclusion and the circumstances in which seclusion takes place requires greater consideration. Interventions such as providing information to patients about seclusion, increased interaction with patients during seclusion, attention to privacy and effective debriefing following seclusion may help to reduce the emotional impact of the practice.