Fuzzy neural networks for control of dynamic systems

This thesis provides a unified and comprehensive treatment of the fuzzy neural networks as the intelligent controllers. This work has been motivated by a need to develop the solid control methodologies capable of coping with the complexity, the nonlinearity, the interactions, and the time variance of the processes under control. In addition, the dynamic behavior of such processes is strongly influenced by the disturbances and the noise, and such processes are characterized by a large degree of uncertainty. Therefore, it is important to integrate an intelligent component to increase the control system ability to extract the functional relationships from the process and to change such relationships to improve the control precision, that is, to display the learning and the reasoning abilities. The objective of this thesis was to develop a self-organizing learning controller for above processes by using a combination of the fuzzy logic and the neural networks. An on-line, direct fuzzy neural controller using the process input-output measurement data and the reference model with both structural and parameter tuning has been developed to fulfill the above objective. A number of practical issues were considered. This includes the dynamic construction of the controller in order to alleviate the bias/variance dilemma, the universal approximation property, and the requirements of the locality and the linearity in the parameters. Several important issues in the intelligent control were also considered such as the overall control scheme, the requirement of the persistency of excitation and the bounded learning rates of the controller for the overall closed loop stability. Other important issues considered in this thesis include the dependence of the generalization ability and the optimization methods on the data distribution, and the requirements for the on-line learning and the feedback structure of the controller. Fuzzy inference specific issues such as the influence of the choice of the defuzzification method, T-norm operator and the membership function on the overall performance of the controller were also discussed. In addition, the e-completeness requirement and the use of the fuzzy similarity measure were also investigated. Main emphasis of the thesis has been on the applications to the real-world problems such as the industrial process control. The applicability of the proposed method has been demonstrated through the empirical studies on several real-world control problems of industrial complexity. This includes the temperature and the number-average molecular weight control in the continuous stirred tank polymerization reactor, and the torsional vibration, the eccentricity, the hardness and the thickness control in the cold rolling mills. Compared to the traditional linear controllers and the dynamically constructed neural network, the proposed fuzzy neural controller shows the highest promise as an effective approach to such nonlinear multi-variable control problems with the strong influence of the disturbances and the noise on the dynamic process behavior. In addition, the applicability of the proposed method beyond the strictly control area has also been investigated, in particular to the data mining and the knowledge elicitation. When compared to the decision tree method and the pruned neural network method for the data mining, the proposed fuzzy neural network is able to achieve a comparable accuracy with a more compact set of rules. In addition, the performance of the proposed fuzzy neural network is much better for the classes with the low occurrences in the data set compared to the decision tree method. Thus, the proposed fuzzy neural network may be very useful in situations where the important information is contained in a small fraction of the available data.

Nursing and being nursed from patients' perspectives : an ethnographic study

The research was commenced to understand why patients submissively accept compliance in the nursing relationship. To understand this phenomenon, an anthropological perspective about nursing was sought through ethnographic processes, utilising The Ethnographic Research Cycle and The Developmental Research Sequence as detailed by James Spradley (1980). Ethnographic methods of fieldwork and participant observation were undertaken over a three month period in a district nursing service in a rural area of Victoria, Australia. There are three over arching aims. The first is to record information at risk of being lost, hence the ethnography is an archival record describing insiders' perspectives of nursing practice. Description brings into view broad contextual issues that shape nursing practice, the daily routines and cultural norms of nursing, whilst also giving voice to patients' experiences about being nursed. The early part of the thesis is descriptive of the mundanity of nursing practice and of being a patient as these interactions are of fundamental significance in giving meaning to people's lives. Secondly the inquiry seeks to capture the meaning patients attach to nursing. Further description continued to uncover perspectives of nursing that were layered to present an integrated whole that still acknowledges the integrity of individuals and structures that make up that whole. As the cultural picture gained detail, the expected norms of being a nurse and a patient became evident, revealing how culture gives shape to nursing and being nursed. Notions of time and space were found to be constructs of being a patient which shape the illness experience. They are not necessarily within a patient's control, nonetheless, there is a norm and deviation from this norm has consequences for patients. Thirdly, the ethnography conveys the expected behaviour for a person who becomes a patient, to make known the implicit meanings, norms of behaviour and unwritten rules that a patient needs to understand as they pass through various stages of the health care system. In conclusion, the ethnography consistently reveals the underlying conflict between what nurses believe they do and the meaning attached to the experience of being nursed. For example, some nurses practice with patients' values as central to practice; others believe they care, yet observation and patient conversations suggest that they do not. The ethnography revealed that society expects nurses to elicit and reinforce compliance. Similarly, the power of culture shapes the experience of patients as the desire to be accepted, as a personal need, and as a means of having their nursing needs met, means that patients will invariably be passively compliant. The consequence is that nurses have a dominant power differential over patients, therefore, if nursing is to continue to describe practice as humanistic and caring, they ought to actively seek to be aware of patients' values and be motivated to accept these as central to practice.

Constructing the monster : notions of the monstrous in classical antiquity

Focussing on humaniod monsters, this thesis uses insights from Foucault's theory about the "archaeology" of discourses and Derrida's practice of deconstruction to examine how monstrosity was spoken of in antiquity, and how the various "sciences" dealt with anomalous monsters without jeopardising their epistemological credibility. Discussion begins with a survey of the semantic field of teras and monstrum. Since portentousness was central to both terms, the signification of monstrous portents in divinatory practice is next aalysed in the historiography of Herodotus, Livy, and others. Cicero's De divinatione reveals the theory and the problem for that science posed by accidental monstrosities. Chance and novelty are also issues in mythical and scientific cosmogonies < of Hesiod, and Orphism, Empedo-cles, and Lucretius> , where monsters arise and are dealt with while cosmic regularities, reproductive and ethical, are being established. Teleology and the stability of species'forms emerge as important concerns. These issues are further considered in Aristotle's bioogy and in medical writings from Hippocrates to Galen. There, theories are produced about monstrous embryology which attempt to answer the question of how deformities occur if species' forms are perpetuated through repro-duction. Biological and taxonomic--as well as ethical--boundaries are violated also by mythic human-beast hybrids. Narratives about such anomalies clarify the nature of monstrous deviance and enact solutions to the problem. Their strategies have much in common with other modes of discourse. Ethnography is posed similar questions about monstrous races' physical and ethical deviations from the civilised norm; it speaks of those issues in terms of invariance of form through generations, geographical remoteness and the codes which situate those races ethically. Finally, Augustine’s discourse on monstrous individuals and races is examined as Christianity’s belief in God’s governance reformulates the ancient’s discussions of chane or novelty and the invariance of species. In all these discourses founded on determinate meaning, the persistant paradox of monstrosity need offer no challenge to rationality provided its indefinable diversity is unacknowledged and the notion is constructed in such a way as to reaffirm the certainties.

Severely compromised quality of life in women and those of lower socioeconomic status waiting for joint replacement surgery

Objective
To determine health-related quality of life (HRQOL), psychological distress, physical function, and self efficacy in persons waiting for lower-limb joint replacement surgery.

Methods
A total of 214 patients on a waiting list for unilateral primary total knee or hip replacement at a large Australian public teaching hospital completed questionnaires after entry to the list. HRQOL and psychological distress were compared with available population norms.

Results
Average HRQOL was extremely poor (mean ± SD 0.39 ± 0.24) and much lower (>2 SD) than the population norm. Near death-equivalent HRQOL or worse than death-equivalent HRQOL were reported by 15% of participants. High or very high psychological distress was up to 5 times more prevalent in the waiting list sample (relative risk 5.4 for participants ages 75 years and older; 95% confidence interval 3.3, 9.0). Women had significantly lower HRQOL, self efficacy, and physical function scores than men. After adjusting for age and sex, significant socioeconomic disparities were also found. Participants who received the lowest income had the poorest HRQOL; those with the least education or the lowest income had the highest psychological distress. Low self efficacy was moderately associated with poor HRQOL (r = 0.49, P < 0.001) and more strongly associated with high psychological distress (r = -0.55, P < 0.001).

Conclusion
Patients waiting for joint replacement have very poor HRQOL and high psychological distress, especially women and those from lower socioeconomic backgrounds. Lengthy waiting lists mean patients can experience extended and potentially avoidable morbidity. Interventions to address psychological distress and self efficacy could reduce this burden and should target women and lower socioeconomic groups.

Community attitudes to fertility and infertility

Assesses by survey some of the current community attitudes to fertility and infertility with reference to artificial insemination. Indicates that a pronatalist norm is dominant with some reservation in acceptance of artificial insemination by donor.

On migrative means and copulas

In this short work we extend the results of J.Fodor and I.J. Rudas [6] characterizing migrative triangular norms, to quasi-arithmetic means. We use idempotisation construction to obtain quasi-arithmetic means migrative with respect to fixed parameter a. We also obtain the necessary and sufficient condition for a migrative triangular norm to be a copula.

Parental and home influences on adolescents' TV viewing : a mediation analysis

Objective. To explore the association between home environmental variables and television (TV) time, and the mediating pathways underlying this association.

Methods. The current study used data from the longitudinal ENDORSE study. Self-reported data was available for 1 265 adolescents (mean age of 12–15 years at baseline) on home environment (availability of a TV in the bedroom, perceived parental modelling, family rules), potential mediators (intention, attitude, perceived behavioural control, subjective norm towards TV viewing) and TV viewing time. Mediation analyses were conducted using General Estimating Equations and mediation effects were calculated as the product-of-coefficients.

Results. Significant overall positive associations were found for the presence of a TV in the bedroom and parental modelling with self-reported TV viewing. Controlling family rules showed an inverse association with reported TV time. Similarly, parental modelling and a TV in the bedroom were significantly positively associated with the Theory of Planned Behaviour variables and habit strength, while family rules showed an inverse association with these potential mediators. In turn, most potential mediators were positively associated with TV viewing. Intention, attitude and habit strength were the strongest mediators in all three associations explaining more than 55% of the overall association. Habit strength alone explained 38.2%–58.0% of the overall associations.

Conclusions. Home and family environmental predictors of TV time among adolescents may be strongly mediated by habit strength and other personal factors. Future intervention studies should explore if changes in home and family environments indeed lead to reductions in TV time through these mediators.

Availability of sports facilities as moderator of the intention - sports participation relationship among adolescents

This longitudinal study aimed to identify individual and environmental predictors of adolescents’ sports participation and to examine whether availability of sports facilities moderated the intention–behaviour relation. Data were obtained from the ENvironmental Determinants of Obesity in Rotterdam SchoolchildrEn study (2005/2006 to 2007/2008). A total of 247 adolescents (48% boys, mean age at follow-up 15 years) completed the surveys at baseline and follow-up. At baseline, adolescents completed a survey that assessed engagement in sports participation, attitude, subjective norm, perceived behavioural control and intention towards sports participation. Availability of sports facilities (availability) was assessed using a geographic information system. At follow-up, sports participation was again examined. Multiple logistic regression analyses were conducted to test associations between availability of sports facilities, theory of planned behaviour variables and the interaction of intention by availability of sports facilities, with sports participation at follow-up. Simple slopes analysis was conducted to decompose the interaction effect. A significant availability × intention interaction effect [odds ratio: 1.10; 95% confidence interval: 1.00–1.20] was found. Simple slopes analysis showed that intention was more strongly associated with sports participation when sports facilities were more readily available. The results of this study indicate that the intention–sports participation association appears to be stronger when more facilities are available.

Technical features of BIM servers for collaboration on building and construction projects

This paper reviews the technical features and requirements of Building Information Modelling (BIM)-servers as collaboration platforms for multi-disciplinary building and construction projects. Multi-disciplinary collaboration is the norm in the Architecture, Engineering, and Construction (AEC) industries, especially in complex projects. The widespread adoption of object-oriented Computer-aided Design (CAD) tools that support BIM capabilities has generated greater interest in model based exchange of information across disciplines and consultants who have traditionally collaborated through the frequent exchange of 2D drawings and documents. BIM-servers are collaboration platforms that are expected to provide the technical capability to support this inter-disciplinary exchange of 3D models in addition to intelligent management of the related drawings, documents and other forms of data. Since BIM-servers are a recent technical development a review of their technical features can help further development. This paper serves this objective by providing a review of the technical features and requirements for using BIM-servers as multi-disciplinary collaboration platforms on building and construction projects. The methodologies include focus group interviews (FIGs) with representatives from the diverse AEC disciplines, a case study on a state-of-the-art BIM-server, and a critical review and analysis of current collaboration platforms that are available to the AEC industries. This paper concludes that greater emphasis should be placed on supporting technical requirements to facilitate technology management and implementation across disciplines. Their implications for user-centric technology development in design and construction industry are also discussed.

The relationship between attitude and behavior : an empirical study in China

Purpose – The purpose of this paper is to examine the effects of attitude towards behavior, subject norm and perceived behavioral control (PBC) on a Chinese subject's evaluation of a tertiary education program.

Design/methodology/approach – This study adopts a 3 (country-of-origin) by 2 (location) between-group factorial design. The Theory of Planned Behavior (TPB) is used as a framework to understand the intentions of the Chinese subjects concerning their enrollment in an offshore program.

Findings – Results show that a subject's attitude towards behavior, subject norm and PBC had a significantly positive relationship with the subjects' enrollment intentions irrespective of the country-of-origin (COO) of an education program. However, results also indicate that the significance of the three components on enrollment intention is contingent on which country the offshore program is from.

Practical implications – The findings of this study can help foreign education institutions develop a good understanding of the education market in China.

Originality/value – This study is one of the few studies that have adopted the TPB, the widely used psychology theory, in the Chinese context.

Maximising clinical trial participation - how important is the social context?

Individuals participate in clinical research for a variety of reasons, dependant not only on the trial phase and their own clinical status but also their sense of optimism, altruism, clinician influence, or financial gain. Practical factors influencing participation may include geographical access, motivation, availability, and language spoken. Widely-used health psychology models (e.g the Theory of Reasoned Action, the Health Belief Model) demonstrate that, in addition to these factors, the primary reason for non-participation in clinical research is social perception of risk. These models detail how beliefs and attitudes toward clinical research develop within, and are influenced by, an individual's social context. Perceived social benefits and barriers toward participation are considered alongside perceived susceptibility and severity of side-effects from participation, or symptoms of disease. A major factor in such models is the subjective norm i.e. individuals' beliefs that important others expect or wish him/her to perform this behaviour, and the motivation to act in accordance with their expectations or wishes. This includes, but is not limited to, the role of the media, peers and family members, clarification of risk associated with trial participation and discussion of comparative risk, and risk equivalence between trials and same treatment outside trials.
The workshop will involve a 30 minute presentation from the discussion leaders and a 30 minute group-work session to explore how an understanding of the social context of participation in clinical research can maximise appropriate clinical trial participation.

The disappearing mammal fauna of northern Australia : context, cause, and response

This article provides a context to, attempts an explanation for, and proposes a response to the recent demonstration of rapid and severe decline of the native mammal fauna of Kakadu National Park. This decline is consistent with, but might be more accentuated than, declines reported elsewhere in northern Australia; however, such a comparison is constrained by the sparse information base across this region. Disconcertingly, the decline has similarities with the earlier phase of mammal extinctions that occurred elsewhere in Australia. We considered four proximate factors (individually or interactively) that might be driving the observed decline: habitat change, predation (by feral cats), poisoning (by invading cane toads), and novel disease. No single factor readily explains the current decline. The current rapid decline of mammals in Kakadu National Park and northern Australia suggests that the fate of biodiversity globally might be even bleaker than evident in recent reviews, and that the establishment of conservation reserves alone is insufficient to maintain biodiversity. This latter conclusion is not new; but the results reported here further stress the need to manage reserves far more intensively, purposefully, and effectively, and to audit regularly their biodiversity conservation performance.

Theorizing normalization as hidden privilege

This chapter provides a theoretical overview of some of the ways in which the process of normalization functions as forms of hidden privilege. It outlines how privileged groups come to represent the dominant norm whereby white, male, able-bodied, heterosexual, middle-class people in Western societies come to embody what it means to be normal. It also explores strategies for challenging the normalization of privilege by encouraging the development of responsibility not only for individual actions but also for the social practices which create them.

Evaluating the feasibility, effectiveness and acceptability of an active play intervention for disadvantaged preschool children : a pilot study

Australian children from disadvantaged families are at increased risk of delays in acquiring fundamental movement skills, with physical inactivity and increased risk of the potential consequences of obesity. The aims of this pilot study were to: 1) assess the fundamental movement skills of disadvantaged children; 2) evaluate the feasibility and effectiveness of adapting an existing parenting and child development program to incorporate additional weekly play activities (the intervention); and 3) examine the acceptability of the intervention. Children aged 1.5-5 years were assessed pre-intervention (n = 26) and postintervention (n = 16) over a period of 22 weeks using the gross motor component of the Peabody Developmental Motor Scales - 2nd Edition (PDMS-2) (Folio & Fewell, 2000). Parents completed a demographic and environmental survey and those implementing the intervention were interviewed to assess the feasibility and acceptability of the intervention. Pre-intervention the children from disadvantaged families had locomotion, object manipulation and Gross Motor Quotient (GMQ) scores significantly below the norm-referenced standards of the PDMS-2 (p < 0.05). The intervention was associated with improvements in the locomotion (8.35 to 9.5; p = 0.009), and object manipulation (8.6 to 9.6; p = 0.04) subtest scores and the GMQ scores (92.6 to 99.3; p < 0.01). The intervention was deemed feasible and acceptable by those implementing the program. Low levels of physical activity in disadvantaged communities may be related to delayed acquisition of fundamental movement skills in childhood. This pilot study raises the possibility of correcting this deficit in early childhood, and improving the potential for all children to lead an active life.

Learning to manage : transformative outcomes of competency-based training

Transformative learning theory is a dominant approach to understanding adult learning. The theory addresses the way our perspectives on the world, others and ourselves can be challenged and transformed in our ongoing efforts to make sense of the world. It is a conception of learning that does not focus on the measurable acquisition of knowledge and skills, but looks rather to the dynamics of self-questioning and upheaval as the key to adult learning. In this article, transformative learning theory is used as a lens for studying learning in a competency-based, entry-level management course. Instead of asking which knowledge and skills were developed and how effectively, the research enquired into deeper changes wrought by the learning experiences. The research found that for some learners the course contributed to significant discontent as they discovered that management practices they took to represent the norm fell dramatically short of the model promoted in the training.