A fuzzy logic approach to experience based
- Authors: Sun, Zhaohao , Finnie, Gavin
- Date: 2007
- Type: Text , Journal article
- Relation: International Journal of Intelligent Systems Vol. 22, no. 8 (2007), p. 867-889
- Full Text: false
- Reviewed:
- Description: International Journal of Intelligent Systems archive Volume 22 Issue 8, August 2007 John Wiley & Sons, Inc. New York, NY, USA table of contents doi>10.1002/int.v22:8
From Behind Closed Doors - A Creative Response to Family Violence
- Authors: Nash, Gavin
- Date: 2004
- Type: Text , Visual art work
- Full Text: false
An investigation of correlation factors linking footing resistance on sand with cone penetration test results
- Authors: Gavin, Kenneth , Tolooiyan, Ali
- Date: 2012
- Type: Text , Journal article
- Relation: Computers and Geotechnics Vol. 46, no. (2012), p. 84-92
- Full Text:
- Reviewed:
- Description: Significant research effort has led to improvements in our ability to estimate the ultimate bearing resistance of footings in sand. These techniques often estimate the footing resistance at relatively large displacements, typically 10% of the footing width, q b0.1. Cone Penetration Test (CPT) design methods typically link q b0.1 and q c through a constant reduction factor, α. A range of α factors for shallow footings have been proposed, some methods suggest that α is constant and while others that it varies with footing width and depth (or stress level). There is a dearth of field data with which to compare these correlation factors, in particular where foundation width and depth have been varied in the same ground conditions. For this reason finite element analyses have proven to be a useful tool for performing the parametric studies required to asses factors controlling α. This paper describes the results of numerical analyses performed to investigate α factors for soil profiles which were calibrated using the results of the CPT tests performed at a dense sand test-bed site. The numerical model was first used to perform parametric analyses to consider the effect of footing width, B and footing depth, D on the α factor mobilised in dense Blessington sand. In order to assess the effects of relative density, footing tests in a range of natural sands with variable in situ densities were modeled. The results of the finite element analyses suggest that a direct correlation between q b0.1 and q c can be established at a given test site which is independent of footing width and depth and is relatively weakly dependent on the sands relative density if the zone of influence of the foundation considered is large enough. © 2012 Elsevier Ltd.
On computation of optimal strategies in oligopolistic markets respecting the cost of change
- Authors: Outrata, Jiri , Valdman, Jan
- Date: 2020
- Type: Text , Journal article
- Relation: Mathematical Methods of Operations Research Vol. 92, no. 3 (2020), p. 489-509
- Relation: http://purl.org/au-research/grants/arc/DP160100854
- Full Text:
- Reviewed:
- Description: The paper deals with a class of parameterized equilibrium problems, where the objectives of the players do possess nonsmooth terms. The respective Nash equilibria can be characterized via a parameter-dependent variational inequality of the second kind, whose Lipschitzian stability, under appropriate conditions, is established. This theory is then applied to evolution of an oligopolistic market in which the firms adapt their production strategies to changing input costs, while each change of the production is associated with some “costs of change”. We examine both the Cournot-Nash equilibria as well as the two-level case, when one firm decides to take over the role of the Leader (Stackelberg equilibrium). The impact of costs of change is illustrated by academic examples. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
High-intensity interval training for the management of nonalcoholic steatohepatitis : participant experiences and perspectives
- Authors: Keating, Shelley , Croci, Ilaria , Wallen, Matthew , Cox, Emily , Coombes, Jeff , Burton, Nicola , Macdonald, Graeme , Hickman, Ingrid
- Date: 2023
- Type: Text , Journal article
- Relation: Journal of Clinical and Translational Hepatology Vol. 11, no. 5 (2023), p. 1050-1060
- Full Text:
- Reviewed:
- Description: Background and Aims: High-intensity interval training (HIIT) is a therapeutic option for people with nonalcoholic steatohepatitis (NASH). However, the perspectives and experiences of HIIT for people with NASH are unknown, limiting translation of research. We explored the experiences and perspectives of both professionally supervised and self-directed HIIT in people with NASH and evaluated participant-reported knowledge, barriers, and enablers to commencing and sus-taining HIIT. Methods: Twelve participants with NASH un-derwent 12 weeks of supervised HIIT (3 days/week, 4×4 minutes at 85–95% maximal heart rate, interspersed with 3 minutes active recovery), followed by 12-weeks of self-directed (unsupervised) HIIT. One-on-one, semistructured participant interviews were conducted by exercise staff prior to HIIT and following both supervised and self-directed HIIT to explore prior knowledge, barriers, enablers, and outcomes at each stage. Interviews were audio-recorded, transcribed, coded, and thematically analyzed by two independent re-searchers. Results: Four dominant themes were identified: (1) no awareness of/experience with HIIT and ambivalence about exercise capabilities; (2) multiple medical and social barriers to commencing and continuing HIIT; (3) exercise specialist support was a highly valued enabler, and (4) HIIT was enjoyed and provided holistic benefits. Conclusions: People with NASH may lack knowledge of and confidence for HIIT, and experience multiple complex barriers to commencing and continuing HIIT. Exercise specialist support is a key enabler to sustained engagement. These factors need to be addressed in future clinical programs to augment the uptake and long-term sustainability of HIIT by people with NASH so they can experience the range of related benefits. © 2023 The Author(s).
Modelling the cone penetration test in sand using cavity expansion and arbitrary lagrangian eulerian finite element methods
- Authors: Tolooiyan, Ali , Gavin, Kenneth
- Date: 2011
- Type: Text , Journal article
- Relation: Computers and Geotechnics Vol. 38, no. 4 (2011), p. 482-490
- Full Text:
- Reviewed:
- Description: The paper considers two techniques to model the Cone Penetration Test (CPT) end resistance, qc in a dense sand deposit using commercial finite element programmes. In the first approach, Plaxis was used to perform spherical cavity expansion analyses at multiple depths. Two soil models, namely; the Mohr-Coulomb (MC) and Hardening Soil (HS) models were utilized. When calibrated using simple laboratory element tests, the HS model was found to provide good estimates of qc. However, at shallow depths, where the over-consolidation ratio of the sand was highest, the relatively large horizontal stresses developed prevented the full development of the failure zone resulting in under-estimation of the qc value. The second approach involved direct simulation of cone penetration using a large-strain analysis implemented in Abaqus/Explicit. The Arbitrary Lagrangian Eulerian (ALE) technique was used to prevent excessive mesh deformation. Although the Druker-Prager soil model used was not as sophisticated as the HS model, excellent agreement was achieved between the predicted and measured qc profiles.
Ode to form
- Authors: Mestrom, Sanne
- Date: 2012
- Type: Text , Visual art work
- Full Text:
Soil moisture, organic carbon, and nitrogen content prediction with hyperspectral data using regression models
- Authors: Datta, Dristi , Paul, Manoranjan , Murshed, Manzur , Teng, Shyh Wei , Schmidtke, Leigh
- Date: 2022
- Type: Text , Journal article
- Relation: Sensors (Basel, Switzerland) Vol. 22, no. 20 (2022), p.
- Full Text:
- Reviewed:
- Description: Soil moisture, soil organic carbon, and nitrogen content prediction are considered significant fields of study as they are directly related to plant health and food production. Direct estimation of these soil properties with traditional methods, for example, the oven-drying technique and chemical analysis, is a time and resource-consuming approach and can predict only smaller areas. With the significant development of remote sensing and hyperspectral (HS) imaging technologies, soil moisture, carbon, and nitrogen can be estimated over vast areas. This paper presents a generalized approach to predicting three different essential soil contents using a comprehensive study of various machine learning (ML) models by considering the dimensional reduction in feature spaces. In this study, we have used three popular benchmark HS datasets captured in Germany and Sweden. The efficacy of different ML algorithms is evaluated to predict soil content, and significant improvement is obtained when a specific range of bands is selected. The performance of ML models is further improved by applying principal component analysis (PCA), a dimensional reduction method that works with an unsupervised learning method. The effect of soil temperature on soil moisture prediction is evaluated in this study, and the results show that when the soil temperature is considered with the HS band, the soil moisture prediction accuracy does not improve. However, the combined effect of band selection and feature transformation using PCA significantly enhances the prediction accuracy for soil moisture, carbon, and nitrogen content. This study represents a comprehensive analysis of a wide range of established ML regression models using data preprocessing, effective band selection, and data dimension reduction and attempt to understand which feature combinations provide the best accuracy. The outcomes of several ML models are verified with validation techniques and the best- and worst-case scenarios in terms of soil content are noted. The proposed approach outperforms existing estimation techniques.
323 Main on main
- Authors: Nash, Gavin
- Type: Text , Visual art work
- Full Text:
- Description: Original Creative Work: Design/Architectural work on website
Multi-modal reliability analysis of slope stability
- Authors: Reale, Cormac , Gavin, Kenneth , Prendergast, Luke , Xue, Jianfeng
- Date: 2016
- Type: Text , Conference proceedings
- Relation: 6th Transport Research Arena; Warsaw, Poland; 18th-21st April 2016; published inTransportation Research Procedia Vol. 14, p. 2468-2476
- Full Text:
- Reviewed:
- Description: Probabilistic slope stability analysis typically requires an optimisation technique to locate the most probable slip surface. However, for many slopes particularly those containing many different soil layers or benches several distinct critical slip surfaces may exist. Furthermore, in large slopes these critical slip surfaces may be located at significant distances from each other. In such circumstances, finding and rehabilitating the most probable failure surface is of little merit, as rehabilitating that surface does not improve the safety of the slope as a whole. Unfortunately, existing slip surface search techniques were developed to converge on one global minimum. Therefore, to implement such methods to evaluate the stability of a slope with multiple failure mechanisms requires the user to define probable slip locations prior to calculation. This requires extensive engineering experience and places undue responsibility on the engineer in question. This paper proposes the use of a locally informed particle swarm optimisation method which is able to simultaneously converge to multiple critical slip surfaces. This optimisation model when combined with a reliability analysis is able to define all areas of concern within a slope. A case study of a railway slope is presented which highlights the benefits of the model over single objective optimisation models. The approach is of particular benefit when evaluating the stability of large existing slopes with complicated stratigraphy as these slopes are likely to contain multiple viable slip surfaces. © 2016 The Authors.
Internet of vehicles for e-health applications : a potential game for optimal network capacity
- Authors: Lin, Din , Tang, Yu , Labeau, Fabrice , Yao, Yuanzhe , Imran, Muhammad , Vasilakos, Athanasios
- Date: 2017
- Type: Text , Journal article
- Relation: IEEE Systems Journal Vol. 11, no. 3 (2017), p. 1888-1896
- Full Text:
- Reviewed:
- Description: Wireless technologies are pervasive to support ubiquitous healthcare applications. However, a critical issue of using wireless communications under a healthcare scenario rests at the electromagnetic interference (EMI) caused by RF transmission, and a high level of EMI may lead to a critical malfunction of medical sensors. In view of EMI on medical sensors, we propose a power control algorithm under a noncooperative game theoretic framework to schedule data transmission. Our objective is to ensure that the noncooperative game of power control can achieve a network-level objective - the optimal network capacity, although the wireless users are selfish and only interested in optimizing their own channel capacity. To obtain this objective, we show that our proposed noncooperative game is a potential game and propose the best-response-dynamics algorithm which can ensure that the game strategy of each user is induced to the optimal solution to the problem of network-level optimal capacity. Numerical results illustrate that the proposed algorithm can achieve an enhancement of 8% of network performance than the existing algorithm against the variations of mobile hospital environments. © 2007-2012 IEEE.
A comprehensive spectrum trading scheme based on market competition, reputation and buyer specific requirements
- Authors: Hassan, Md Rakib , Karmakar, Gour , Kamruzzaman, Joarder , Srinivasan, Bala
- Date: 2015
- Type: Text , Journal article
- Relation: Computer Networks Vol. 84, no. (2015), p. 17-31
- Full Text:
- Reviewed:
- Description: In the exclusive-use model of spectrum trading, cognitive radio devices or secondary users can buy spectrum resources from licensed users or primary users for a short or long period of time. Considering such spectrum access, a trading model is introduced where a buyer can select a set of candidate sellers based on their reputation and their offers in fulfilling its requirements, namely, offered signal quality, contract duration, coverage and bandwidth. Similarly, a seller can assess a buyer as a potential trading partner considering the buyer's reliability, which the seller can derive from the buyer's reputation and financial profile. In our scheme, seller reputation or buyer reliability can be either obtained from a reputation brokerage service, if one exists, or calculated using our model. Since in a competitive market, the price of a seller depends on that of other sellers, game theory is used to model the competition among multiple sellers. An optimization technique is used by a buyer to select the best seller(s) and optimize purchase to maximize its utility. This may result in buying from multiple sellers of certain amount of bandwidth from each, depending on price and meeting requirements and budget constraints. Stability of the model is analyzed and performance evaluation shows that it benefits sellers and buyers in terms of profit and throughput, respectively. © 2015 Elsevier B.V. All rights reserved.
High-intensity interval training is safe, feasible and efficacious in nonalcoholic steatohepatitis : a randomized controlled trial
- Authors: Keating, Shelley , Croci, Ilaria , Wallen, Matthew , Cox, Emily , Thuzar, Moe , Pham, Uyen , Mielke, Gregore , Coombes, Jeff , Macdonald, Graeme , Hickman, Ingrid
- Date: 2023
- Type: Text , Journal article
- Relation: Digestive Diseases and Sciences Vol. 68, no. 5 (2023), p. 2123-2139
- Full Text:
- Reviewed:
- Description: Background: High-Intensity Interval Training (HIIT) involves bursts of high-intensity exercise interspersed with lower-intensity exercise recovery. HIIT may benefit cardiometabolic health in people with nonalcoholic steatohepatitis (NASH). Aims: We aimed to examine the safety, feasibility, and efficacy of 12-weeks of supervised HIIT compared with a sham-exercise control (CON) for improving aerobic fitness and peripheral insulin sensitivity in biopsy-proven NASH. Methods: Participants based in the community [(n = 14, 56 ± 10 years, BMI 39.2 ± 6.7 kg/m2, 64% male), NAFLD Activity Score 5 (range 3–7)] were randomized to 12-weeks of supervised HIIT (n = 8, 4 × 4 min at 85–95% maximal heart rate, interspersed with 3 min active recovery; 3 days/week) or CON (n = 6, stretching; 3 days/week). Safety (adverse events) and feasibility determined as
Importance of relating with God for spiritual well-being
- Authors: Fisher, John
- Date: 2014
- Type: Text , Thesis
- Full Text:
- Description: The importance of relating with God for Spiritual Well-Being Twenty years of research in spiritual health/well-being culminate in this thesis. My PhD (1998), University of Melbourne, presented a Four Domains Model of Spiritual Health/Well-Being. This formed the theoretical base for several spiritual well-being questionnaires, presented in my EdD (2009), University of Ballarat. The main instrument, Spiritual Health And Life-Orientation Measure (SHALOM), proposed a novel method of assessing quality of relationships which are posited as reflecting spiritual well-being. These relationships are of each person with themselves, others, the environment and/or with a Transcendent Other (God). Instead of just investigating lived experiences, SHALOM asks for two responses to each item. Each respondent’s lived experience is compared with their stated ideals. Studies presented herein show that this double-response method, comparing ideal with actual, provides a statistically stronger measure of quality of relationships than lived experiences alone, thus spiritual well-being. Eighteen publications included in this thesis relate to studies of spiritual well-being in educational, healthcare and general community settings. A total of 52 studies, using SHALOM with 41686 people from 27 countries, have shown that, of the four sets of relationships measured by SHALOM, relating with God explains greatest variance in spiritual well-being, so is therefore most important. An international study with people involved with, as well as some opposed to, spirituality and religious education led to a generic form of SHALOM, in which the theistic words were replaced by ‘Transcendent’, with 19 alternatives provided from which to select preferred Transcendent, or none. This project revealed that relating with God, as Transcendent, provides greatest support for a person’s relating with self and others, in contrast to help provided by non-theistic and non-religious Transcendents and not believing in Transcendents. This research implies that researchers need to investigate relationship with God in any study of spiritual well-being, whether or not it fits their personal worldview.
- Description: Doctor of Philosophy
Water allocation argument tree (WAAT): A tool for facilitating public participation in water allocation decisions
- Authors: Graymore, Michelle , Stranieri, Andrew , McRae-Williams, Pamela , Mays, Heather , Lehmann, La Vergne , Thoms, Gavin , Yearwood, John
- Date: 2012
- Type: Text , Book
- Full Text: false
- Reviewed:
Investigating spiritual well-being among Islamic Divinity and religious education students in Turkey
- Authors: Coskun, Mehmet , Fisher, John
- Date: 2013
- Type: Text , Journal article
- Relation: Religious Education Journal of Australia Vol. 29, no. 2 (2013), p. 21-28
- Full Text:
- Reviewed:
- Description: In light of increased emphasis on universities being called to facilitate spiritual growth among students, the Spiritual Health And Life-Orientation Measure was used to assess four domains of spiritual well-being among 122 Divinity and 137 Religious Education students in Turkey. Students provided three responses to 20 items reflecting spiritual well-being, indicating their ideals for spiritual well-being, lived experience and how much university helped in each area. Another 16 potential factors were explored to help students develop their spiritual well-being, ranging from self-improvement to scripture. High scores on ideals for spiritual well-being, reported by both groups of students, underpin the lived experiences of Religious Education and Divinity students in each of four domains of spiritual well-being. Relating with God significantly influenced aspects of spiritual well-being but it appears that the highly religious students overstate the influence of religious activities, such as prayer and scripture, on their spiritual well-being. Universities provide small yet significant support in developing the four domains of spiritual well-being for these students. Overall, this study has shown many similarities, yet some significant variations in spiritual well-being between these Divinity and Religious Education students in Turkey. This project provides a sound base from which future studies can be launched to review, enhance and monitor university students' spiritual well-being and to determine the influence of these students' spiritual well-being on the clients they will serve after graduating and gaining employment.
Efficient data gathering in 3D linear underwater wireless sensor networks using sink mobility
- Authors: Akbar, Mariam , Javaid, Nadeem , Khan, Ayesha , Imran, Muhammad , Shoaib, Muhammad , Vasilakos, Athanasios
- Date: 2016
- Type: Text , Journal article
- Relation: Sensors (Switzerland) Vol. 16, no. 3 (2016), p.
- Full Text:
- Reviewed:
- Description: Due to the unpleasant and unpredictable underwater environment, designing an energy-efficient routing protocol for underwater wireless sensor networks (UWSNs) demands more accuracy and extra computations. In the proposed scheme, we introduce a mobile sink (MS), i.e., an autonomous underwater vehicle (AUV), and also courier nodes (CNs), to minimize the energy consumption of nodes. MS and CNs stop at specific stops for data gathering; later on, CNs forward the received data to the MS for further transmission. By the mobility of CNs and MS, the overall energy consumption of nodes is minimized. We perform simulations to investigate the performance of the proposed scheme and compare it to preexisting techniques. Simulation results are compared in terms of network lifetime, throughput, path loss, transmission loss and packet drop ratio. The results show that the proposed technique performs better in terms of network lifetime, throughput, path loss and scalability. © 2016 by the authors; licensee MDPI, Basel, Switzerland.
A unified logical model for CBR-based
- Authors: Sun, Zhaohao , Finnie, Gavin
- Date: 2005
- Type: Text , Journal article
- Relation: International Journal of Intelligent Systems. Vol. 20, no. 1 (2005), p. 29-46
- Full Text: false
- Reviewed:
A reasoning framework for decision making in water allocation: a tree for water
- Authors: Graymore, Michelle , Mays, Heather , Stranieri, Andrew , Lehmann, La Vergne , McRae-Williams, Pamela , Thoms, Gavin , Yearwood, John
- Date: 2011
- Type: Text , Conference paper
- Relation: Paper presented at International Conference on Integrated Water Management 2011
- Full Text: false
- Reviewed:
Investigating Australian education students' views about spiritual well-being, as compared with teachers in schools
- Authors: Fisher, John
- Date: 2009
- Type: Text , Journal article
- Relation: International Journal of Childrens Spirituality Vol. 14, no. 2 (2009), p. 151-167
- Full Text:
- Reviewed:
- Description: Education students in Australian state and Christian universities expressed their views on ideals, lived experience, and help expected from schools in four domains of spiritual well-being (personal, communal, environmental, and transcendental) (SWB), using the Spiritual Health and Life-Orientation Measure (SHALOM). Students' lived experiences greatly affected their views on help provided by schools to nurture students' SWB. Currently, the more religious students in Christian universities reported support for their SWB from religious activities, whereas students in the state university gained support from more humanistic sources. But is this sufficient? Education students in state universities are likely to maintain the status quo regarding SWB in state schools. They report levels of help for students in line with current teachers' views. Christian university education students have lower expectations of schools than current teachers in Christian schools. However, some positive action is being taken in Christian universities to address the spiritual formation of their students. Further opportunities are needed within teacher education and schools in Australia for staff to address this area of vital concern for their own and students' SWB.
- Description: 2003007942