Showing items 12761 - 12780 of 17085

No/w/here/?

- Heron, Julie

  • Authors: Heron, Julie
  • Date: 2007
  • Type: Text , Visual art work
  • Full Text:
  • Description: Textile based installation work part of exhibition- Crossing Boundaries: Understanding Cultures through the Arts InSEA Asian Regional Arts Congress Woosuk Hall, Seoul University Gallery, Seoul, South Korea This investigation involved reconceptualising an existing work as a small-scale installation within a larger group exhibition associated with the INSEA conference and congress. Proposals for individual works were sought and peer reviewed prior to acceptance. The work was repaired, retitled and an additional component included to enable the work to perform as an individual installation.

Non-convex quadratic minimization problems with quadratic constraints: Global optimality conditions

- Jeyakumar, Vaithilingam, Rubinov, Alex, Wu, Zhiyou

  • Authors: Jeyakumar, Vaithilingam , Rubinov, Alex , Wu, Zhiyou
  • Date: 2007
  • Type: Text , Journal article
  • Relation: Mathematical Programming Vol. 110, no. 3 (2007), p. 521-541
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  • Description: In this paper, we first examine how global optimality of non-convex constrained optimization problems is related to Lagrange multiplier conditions. We then establish Lagrange multiplier conditions for global optimality of general quadratic minimization problems with quadratic constraints. We also obtain necessary global optimality conditions, which are different from the Lagrange multiplier conditions for special classes of quadratic optimization problems. These classes include weighted least squares with ellipsoidal constraints, and quadratic minimization with binary constraints. We discuss examples which demonstrate that our optimality conditions can effectively be used for identifying global minimizers of certain multi-extremal non-convex quadratic optimization problems. © Springer-Verlag 2007.
  • Description: C1

Nursing education in Iran : Past, present, and future

- Tabari Khomeiran, Rasoul, Deans, Cecil

  • Authors: Tabari Khomeiran, Rasoul , Deans, Cecil
  • Date: 2007
  • Type: Text , Journal article
  • Relation: Nurse Education Today Vol. 27, no. 7 (2007), p. 708-714
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  • Description: Nursing education in Iran has undergone significant change since its genesis with foreign missionaries over one hundred years ago. More recently, following the 1979 Islamic revolution, nurse education has followed the direction taken by most other countries in moving from an apprenticeship model of training to an academic model. A series of transformative changes to nursing education specifically-and across the higher education system generally-has resulted in nurses now being able to undertake study across all university-based programs up to and including doctoral level. Contemporary nursing students have access to full-text professional journals through the internet, and they may pursue their doctoral studies in other countries. Although these improvements in nursing education in Iran are to be applauded, much more needs to be accomplished to ensure that highly competent nurse practitioners continue to be produced in this country. This article presents an historical overview of the development of nursing education in Iran, within its economic and sociopolitical contexts. Recommendations based upon lessons learned from historical and contemporary realities are presented in order to advance nursing education in this part of world. © 2006 Elsevier Ltd. All rights reserved.
  • Description: C1
  • Description: 2003005859

Nutritional aspects of food extrusion : A review

- Singh, Shivendra, Gamlath, Shirani, Wakeling, Lara

  • Authors: Singh, Shivendra , Gamlath, Shirani , Wakeling, Lara
  • Date: 2007
  • Type: Text , Journal article
  • Relation: International Journal of Food Science and Technology Vol. 42, no. 8 (2007), p. 916-929
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  • Description: Summary Extrusion cooking, as a multi-step, multi-functional and thermal/mechanical process, has permitted a large number of food applications. Effects of extrusion cooking on nutritional quality are ambiguous. Beneficial effects include destruction of antinutritional factors, gelatinisation of starch, increased soluble dietary fibre and reduction of lipid oxidation. On the other hand, Maillard reactions between protein and sugars reduce the nutritional value of the protein, depending on the raw material types, their composition and process conditions. Heat-labile vitamins may be lost to varying extents. Changes in proteins and amino acid profile, carbohydrates, dietary fibre, vitamins, mineral content and some non-nutrient healthful components of food may be either beneficial or deleterious. The present paper reviews the mechanisms underlying these changes, as well as the influence of process variables and feed characteristics. Mild extrusion conditions (high moisture content, low residence time, low temperature) improve the nutritional quality, while high extrusion temperatures (≥200 °C), low moisture contents (<15%) and/or improper formulation (e.g. presence of high-reactive sugars) can impair nutritional quality adversely. To obtain a nutritionally balanced extruded product, careful control of process parameters is essential. © 2007 Institute of Food Science and Technology Trust Fund.
  • Description: C1
  • Description: 2003004850

OK, please just tell us what to do : The challenge of freedom in teacher education

- Davis, Robert, Johnston, Robbie

  • Authors: Davis, Robert , Johnston, Robbie
  • Date: 2007
  • Type: Text , Conference paper
  • Relation: Paper presented at 2007 National Biennial Conference of the Australian Curriculum Studies Association: Curriculum Centre Stage: Inclusivity, Creativity and Diversity, Melbourne : 7th-10th July 2007
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  • Description: At the University of Ballarat, pre-service teachers (PSTs) in their second year of the Bachelor of Education (P-10) are required to plan community-based teaching and learning in conjunction with school students, their teachers and schools along with community organisations. These requirements are in synergy with curriculum developments in schools and appear to be valued by them. While the transformative potential of community-based teaching and learning for teacher educators is acknowledged, there is a clear need for more research into the factors which underlie the success or otherwise of such approaches. In this paper, the implementation of community-based teaching and learning programs developed by pre-service teachers is examined for educational and organisational issues that shaped the outcomes for students. The paper highlights a number of consistent themes that throw light on factors that appear to affect the success of such pre-service courses. These insights contribute to the understanding of community-based pre-service teacher education curricula and pedagogies as an important and emerging area of interest.
  • Description: 2003005036

Old dogs, new shed tricks : An exploration of innovative, workshop-based learning practice in Australia

- Golding, Barry, Brown, Michael, Foley, Annette

  • Authors: Golding, Barry , Brown, Michael , Foley, Annette
  • Date: 2007
  • Type: Text , Conference paper
  • Relation: Paper presented at AVETRA 2007 Conference, Victoria University, Footscray, Victoria: 11th-13th April 2007
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  • Description: Our paper explores some recent innovations in workshop-based learning practice that come out of community-based men's sheds in Australia. It deliberately goes beyond an exploration of the typical community-based men's shed, already explored in our recent NCVER research report and looks at some new and productive interactions between sheds and other informal learning organisations. We go to the margins of rapidly evolving shed practice and single out three types of shed-based organisations that work with school resisters, Vietnam Veterans and older men in aged care. Our aim is to illustrate, using new Australian narrative data, some theoretical and practical implications and benefits of reciprocal, workshop-based mentoring relationships involving men of different ages. Our focus is on ways in which men with a skill or trade are able, in a situated and authentic learning context, to informally weave magic for and with other men, and in some cases with young people. Our paper provides pointers to some of the principles underpinning successful informal and community-based learning practice for older men: particularly the need for a high level of engagement; the choice of an appropriate and safe setting; and to account for the differences associated with age and gender. We articulate an imperative for bringing more blokes into all forms of learning in Australia including through more informal, community-based learning as well as through adult and community education. Our paper and its conclusions have implications for other workshop and shed-based learning practice in vocational education and training as well as informal and community-based learning by volunteers in the quintessential and ubiquitous Australian fire and football sheds.
  • Description: 2003005537

Older men's lifelong learning : Common threads/sheds

- Golding, Barry

  • Authors: Golding, Barry
  • Date: 2007
  • Type: Text , Conference paper
  • Relation: Paper presented at CRLL 4th International Conference: The times they are a-changin': Researching transitions in life long learning, University of Stirling, Scotland : 22nd-24th June 2007
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  • Description: This paper is based primarily on a suite of completed research in Australia into informal learning by older men in community contexts. Based on extensive survey and interviews, this suite forms part of the first prong of a proposed, new international comparative study of older men's(defined as over 45 years) informal learning across countries and cultures. The research into older men's lifelong learning was originally motivated by knowledge of the relatively low proportion of older men involved in adult and community education (ACE) settings in Australia. It was widely believed that older men were not interested and therefore not involved in learning. A number of research projects since 2002 in rural and remote Australian communities sought to look beyond what are conventionally regarded as education providers and closely examine whether and what learning takes place informally by older men who participate in community-based organisations. The research began with studies of men's learning in volunteer rural fire brigades, football and senior citizens clubs, land care as well as adult and community education providers. It led to as study of the learning role and function of rural fire brigades and emergency service organisations in small and remote towns across Australia. The research has most recently focussed on informal learning through men's sheds in community contexts. These workshops specifically for older men have recently sprung up and proliferated across much of southern Australia. What has emerged from the research is a picture of older men with a strong desire to socialise and learn, particularly with other men, in productive, informal contexts, wherever possible outside. Older men's experiences of learning as well as their lives generally have often been adversely affected over a lifetime by negative experiences of formal learning, starting with school. This paper takes what has been learnt from this suite of studies, pulls together some of the common threads, and places the findings against what is known from the wider international research literature about older men's learning. These include an examination of common motivations for older men to learn, common barriers, preferred pedagogies as well as some common valued outcomes. It seeks to determine whether what has been found from this research in Australian community contexts is similar to or different in what has been found other countries and cultural settings. Part of the paper includes consideration of issues associated with men's identities as they age as well as gender issues associated with learning. It also critically examines the role and legitimacy of creating learning spaces and organisations for men and older men in particular.
  • Description: 2003007969
  • Description: 2003005534

On irregular total labellings

- Baca, Martin, Jendrol, Stanislav, Miller, Mirka, Ryan, Joe

On mixed Moore graphs

- Nguyen, Minh Hoang, Miller, Mirka, Gimbert, Joan

On several classes of monographs

- Sugeng, Kiki Ariyanti, Ryan, Joe

On the brink

- McGraw, Amanda

On the non-existence of even degree graphs of diameter 2 and defect 2

- Miller; Mirka, Nguyen, Minh Hoang, Pineda-Villavicencio, Guillermo

On|off (Goes from alienation to allegiance to alienation)

- Eyssens, Terry

Open mapping theorem for topological groups

- Hofmann, Karl, Morris, Sidney

  • Authors: Hofmann, Karl , Morris, Sidney
  • Date: 2007
  • Type: Text , Journal article
  • Relation: Topology Proceedings Vol. 31, no. 2 (2007), p. 533-551
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  • Description: We survey sufficient conditions that force a surjective continuous homomorphism between topological groups to be open. We present the shortest proof yet of an open mapping theorem between projective limits of finite dimensional Lie groups.
  • Description: C1
  • Description: 2003005915

Opinion search in web logs

- Osman, Deanna, Yearwood, John

  • Authors: Osman, Deanna , Yearwood, John
  • Date: 2007
  • Type: Text , Conference paper
  • Relation: Paper presented at Eighteenth Australasian Database Conference, ADC 2007, Ballarat, Victoria : 29th January-2nd February 2007 p. 133-139
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  • Description: Web logs(blogs) are a fast growing forum for people of all ages to express their feelings and opinions on topics of interest. The entries are often written in informal language without the structure found in newswire or published articles. One blog entry may contain many topics, these topics may express an opinion or a fact on a particular topic. This research is in contrast to work on opinion detection which has been carried out on more formally authored texts and on segments that are either whole documents or sentences. Whole web logs are divided into topics using a simple text segmentation approach. Similarity scores are used to distinguish where topic changers occur. The results are compared to human-evaluated topic changes and the most accurate algorithm is used in the remainder of the research. Words within each topic-block are allocated weightings depending on their opinion-bearing strength. Two approaches of using these weights, the sum and the maximum, are used to determine whether the topic-block is opinion-bearing or non-opinion-bearing. The opinion-bearing topic-blocks are rated by human evaluators as either opinion-bearing or non-opinion-bearing with precision of 67% for approach A and 70% for approach B. These results are compared with two approaches on published text to identify the difference between web logs and published articles.
  • Description: 2003004895

Optimal number and placement of network infrastructure in wireless networks

- Kouhbor, Shahnaz

  • Authors: Kouhbor, Shahnaz
  • Date: 2007
  • Type: Text , Thesis , PhD
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  • Description: Wireless Local Area Networks (WLANs) have become a major success in telecommunications during the last few years, due to advantages such as mobility, flexibility, and easier maintenance. A device called an access point (AP) acts as a base station in WLAN for connecting a group of users to the network via radio signal. During the planning of such a network an important problem is to determine the optimal number of these devices and their placement/distribution so that coverage, capacity, and physical security are maximised at minimum cost. In this thesis we are using continuous optimisation techniques to optimise the number of APs and their distribution while cost of deployment is reduced and physical security of the network is enhanced. To find the number and placement of APs, we developed a multi-objective functions model based on path losses and power for free space environments. The two functions in the models are combined by using a balancing parameter. Since it is recognised that some of the objectives can be handled one at a time, in another approach, we followed a step-by-step procedure. We start with a novel optimisation model based on path losses for indoor environments including obstacles. Cost of deployment is saved by finding the minimum number of APs ensuring that the path loss at each test point/receiver is below the given maximum path loss. Next, the physical security of the network is enhanced by placing the APs far from places accessible to unauthorised users to reduce the risk of intrusion into the network. This is achieved in the framework of the model by introducing potential unauthorised users in unauthorised areas for whom coverage is minimised. Due to the presence of obstacles in indoor buildings, the path loss function is discontinuous. Therefore, the objective functions are very complicated and most of the existing optimisation algorithms cannot be applied to solve the problem. We use a global optimisation algorithm that is not used by other researchers to solve the same problem. To validate the accuracy of the optimisation model and performance of the numerical methods, we run tests on several indoor buildings and use wide range of WLAN parameters. The results demonstrate the quality of our model and algorithm. Based on the proposed model and algorithm, we developed a software to assist the network designers in planning wireless LANs.
  • Description: Doctor of Philosophy

Optimal pricing strategies for online auction entrepreneurs

- Knox, Ian, Lynch, David

  • Authors: Knox, Ian , Lynch, David
  • Date: 2007
  • Type: Text , Conference paper
  • Relation: Paper presented at 30th Institute for Small Business & Entrepreneurship Conference, Glasgow, Scotland : 7th-9th November 2007
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  • Description: Objectives: Online auctions have emerged as a major opportunity for individuals to start businesses or for established businesses to diversify and grow their markets. To-date, research interest has focused largely on the technological entrepreneur rather than the Internet based (cyber) entrepreneur. The aim of this study was to examine the behaviour of participants in online auctions, in order to predict optimal selling strategies. Prior work: While auction pricing has been the subject of theoretical research (Budish and Takeyama, 2001; Maskin and Riley, 1985) little empirical data has been collected. Pricing decisions are largely unresolved in the marketing literature despite the importance for consumer perceptions of value. The implication is that managing the price (expectation) for a product in an online auction is important and may be achieved by reference price management. Nagle and Hogan (2006) allude to the distinction between price management and reference price management but suggest that they are clearly interlinked. Approach: A response to changed independent variables under actual market conditions was measured. 1,000 books were offered for sale on eBay. To test the study’s hypotheses, a one way ANOVA was initially undertaken to separately examine differences in the % of recommended retail price (RRP) for each of the study’s independent variables – postage, starting price and length of auction. A factorial ANOVA was completed and an OLS regression analysis was undertaken to assess the effects of selling strategies on the % of RRP obtained. Results: A high start price was found to significantly increase the average percentage of RRP received, contrary to popular belief that favours low start prices. Free postage, was not found to be significant except when combined with a low % of RRP achieved. The optimal auction duration was five days, suggesting, 10 day auctions provide no additional benefits and may in fact result in a lower %RRP achieved. Implications: Early online auction research consistently highlighted the opinion that Internet auctions were primarily concerned with the sale of collectable goods. An examination of 2007 auction data clearly illustrates that this is no longer the case, and in fact the sale of non-collectable goods now dominates, indicating a need for alternative selling strategies, for common value items. Value: No previous work to date has manipulated auction start prices to assess potential profitability. These findings are particularly significant to assist online auction entrepreneurs to develop optimal selling strategies.
  • Description: 2003005204

Optimization based clustering and classification algorithms in analysis of microarray gene expression data sets

- Mardaneh, Karim

  • Authors: Mardaneh, Karim
  • Date: 2007
  • Type: Text , Thesis , PhD
  • Full Text:
  • Description: Doctor of Philosophy
  • Description: Bioinformatics and computational biology are relatively new areas that involve the use of different techniques including computer science, informatics, biochemistry, applied math and etc., to solve biological problems. In recent years the development of new molecular genetics technologies, such as DNA microarrays led to the simultaneous measurement of expression levels of thousands and even tens of thousands of genes. Microarray gene expression technology has facilitated the study of genomic structure and investigation of biological systems. Numerical output of this technology is shown as microarray gene expression data sets. These data sets contain a very large number of genes and a relatively small number of samples and their precise analysis requires a robust and suitable computer software. Due to this, only a few existing algorithms are applicable to them, so more efficient methods for solving clustering, gene selection and classification problems of gene expression data sets are required and those methods need to be computationally applicable and less expensive. The aim of this thesis is to develop new algorithms for solving clustering, gene selection and data classification problems on gene expression data sets. Clustering in gene expression data sets is a challenging problem. The increasing use of DNA microarray-based tumour gene expression profiles for cancer diagnosis requires more efficient methods to solve clustering problems of these profiles. Different algorithms for clustering of genes have been proposed, however few algorithms can be applied to the clustering of samples. k-means algorithm, among very few clustering algorithms is applicable to microarray gene expression data sets, however these are not efficient for solving clustering problems when the number of genes is thousands and this algorithm is very sensitive to the choice of a starting point. Additionally, when the number of clusters is relatively large, this algorithm gives local minima which can differ significantly from the global solution. Over the last several years different approaches have been proposed to improve global ii Abstract Abstract search properties of k-means algorithm. One of them is the global k-means algorithm, however this algorithm is not efficient when data are sparse. In this thesis we developed a new version of the global k-means algorithm, the modified global k-means algorithm which is effective for solving clustering problems in gene expression data sets. In a microarray gene expression data set, in many cases only a small fraction of genes are informative whereas most of them are non-informative and make noise. Therefore the development of gene selection algorithms that allow us to remove as many non-informative genes as possible is very important. In this thesis we developed a new overlapping gene selection algorithm. This algorithm is based on calculating overlaps of different genes. It considerably reduces the number of genes and is efficient in finding a subset of informative genes. Over the last decade different approaches have been proposed to solve supervised data classification problems in gene expression data sets. In this thesis we developed a new approach which is based on the so-called max-min separability and is compared with the other approaches. The max-min separability algorithm is an equivalent of piecewise linear separability. An incremental algorithm is presented to compute piecewise linear functions separating two sets. This algorithm is applied along with a special gene selection algorithm. In this thesis, all new algorithms have been tested on 10 publicly available gene expression data sets and our numerical results demonstrate the efficiency of the new algorithms that were developed in the framework of this research

Optimization solvers and problem formulations for solving data clustering problems

- Ugon, Julien

  • Authors: Ugon, Julien
  • Date: 2007
  • Type: Text , Journal article
  • Relation: Pacific Journal of Optimization Vol. 3, no. 2 (2007), p. 387-397
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  • Description: A popular apprach for solving complex optimization problems is through relaxation: some constraints are removed in order to have a convex problem approximating the original problem. On the other hand, direct approaches for solving such problems are becoming increasingly powerful. This paper examines two cases drawn from data analysis, in order to compare the two techniques.
  • Description: C1
  • Description: 2003004937

Out of the frying pan : From casual teaching to temp work

- Speed, Lesley