Browsing Faculty of Design and Creative Technologies (Te Ara Auaha) by Title
Now showing 1 - 20 of 1839
Results Per Page
- Item2018 JMAD New Zealand Media Ownership Report(Auckland University of Technology, 2018-12-06) Myllylahti, MSummary This eighth JMAD New Zealand media ownership report observes a considerable shift in New Zealand media ownership. In 2018, Australian Nine Entertainment took over Stuff’s parent company Fairfax Media. The report notes that the impact of this merger on the future ownership of Stuff and its New Zealand media holdings remain unknown. In 2018, New Zealand’s print newspaper market had already shrunk considerably after Stuff closed more than 35% of its print newspapers and announced additional cuts in community papers. During 2018, the New Zealand media market remained at least partly competitive. In September, the Court of Appeal rejected the NZME-Stuff merger, and the two companies continued their duopoly and dominance in print and online news. In November, MediaWorks announced that it had signed a conditional merger agreement with Australian outdoor advertising company QMS. If the deal goes through, QMS will have a substantial shareholding in MediaWorks. However, its current owner Oaktree Capital Management will maintain the majority shareholding in the merged entity. New Zealand media ownership: key trends and events • Australian Nine becoming the largest owner of Stuff • NZME & Stuff merger denied and abandoned • MediaWorks plans to merge with Australian QMS • Trust owned, non-profit media outlet Crux emerges
- Item230 GHz VLBI Observations of M87: Event-horizon-scale Structure During an Enhanced Very-high-energy Y-ray State in 2012(IOP Publishing, 2015-07-10)We report on 230 GHz (1.3 mm) very long baseline interferometry (VLBI) observations of M87 with the Event Horizon Telescope using antennas on Mauna Kea in Hawaii, Mt. Graham in Arizona, and Cedar Flat in California. For the first time, we have acquired 230 GHz VLBI interferometric phase information on M87 through measurement of the closure phase on the triangle of long baselines. Most of the measured closure phases are consistent with 0° as expected by physically motivated models for 230 GHz structure such as jet models and accretion disk models. The brightness temperature of the event-horizon-scale structure is ∼1 × 1010 K derived from the compact flux density of ∼1 Jy and the angular size of ∼40 μas ∼ 5.5 Rs, which is broadly consistent with the peak brightness of the radio cores at 1-86 GHz located within ∼102 Rs. Our observations occurred in the middle of an enhancement in very-high-energy (VHE) γ-ray flux, presumably originating in the vicinity of the central black hole. Our measurements, combined with results of multi-wavelength observations, favor a scenario in which the VHE region has an extended size of ∼20-60 Rs.
- Item2D & 3D introductory processes in virtual groups(IEEE, 2003) Clear, Tony; Daniels, M.This paper reports on a collaborative learning trial conducted in 2002 between students at Auckland University of Technology, New Zealand and Uppsala University, Sweden. The trial design included an initial phase in which virtual groups became acquainted using different modes of cyber-icebreaker and a subsequent phase with a common task involving group decision making - evaluating and ranking the different icebreaker experiences. The software used in the trial comprised 1) a custom-developed web-based groupware database and 2) a Java 3D application, implying configurable avatars, which could be manipulated in a virtual world. Each of these applications supported icebreaking activities intended to establish trust between virtual group members, the latter in 3D mode and the former in 2D mode. The trial process and the software are initially outlined. The evaluation strategy and approaches to data analysis are then discussed and the paper concludes with a report of preliminary findings from the trial.
- Item3-D knit transformations(School of Art and Design, Auckland University of Technology, 2014) Smith, AE; Kalyanji, J; Fraser, GRapid advances in seamless knitting technology are opening up signiﬁcant opportunities in the design, production and application of knitted textile preforms. Introduced in the mid 1990’s, seamless machinery enables shaped, 3-dimensional knitted forms to be produced entirely by machine. While garment producers globally adopted the technology for its economic efficiencies, the standardised templates in the technology’s software have generally reduced the sophistication of designs produced. Although the signiﬁ cant unrealised potential in seamless technology is widely acknowledged, designers and manufacturers are facing diffi culties in understanding and integrating the complex technology into their practice. There remains a fundamental gap in knowledge and skills, in part due to a simpliﬁed and modular garment based user interface, which fronts a complex and sophisticated technology. Of the limited research in this area, most relates to garment shaping. More recently, we have started to see sophisticated applications of this technology in highly technical or artisanal design outcomes emerging from textile research centres. The design and production of knitted textile forms in 3-dimensions, as opposed to the 2-dimensional ﬂ at pattern and construction of the past, is a signiﬁcant conceptual shift for traditional textile design practice. Traditional craft and design practices are often disrupted by the emergence of new technologies. We believe that the disruption created by seamless knit technology has the potential to vastly change both the design and application of knitted textiles, moving knitted textile manufacturing up the value chain. This installation showcases the advanced capabilities of seamless knitting technology for innovative, 3-dimensional form building and high-end design outcomes. The group submitting this proposal consists of a knitwear designer, knitted textile designer and knit technician. All are experienced in this ﬁeld, and will draw on current research and developments to work collaboratively in producing a collection of seamless knitted products that demonstrate unique shaping, 3-dimensionality, pattern and texture. The collection includes both garment and non-garment applications and may incorporate smart textile applications.
- ItemA 3D Cuboid Image Encryption Algorithm Based on Controlled Alternate Quantum Walk of Message Coding(MDPI AG, )In order to solve various security risks faced by image privacy protection, we propose a 3D cuboid image encryption scheme based on message-encoded controlled alternate quantum walks. Firstly, we calculated the initial parameters of the quantum system and performed a one-dimensional quantum walk to generate a probability distribution sequence. Secondly, we encoded the sequence into a quaternary message using multiple sets of encoded messages to control the alternate quantum walk model, generating a 3D probability amplitude matrix and 3D probability distribution matrix to obtain the 3D quantum hash sequence through the 3D probability distribution matrix. Then, the image was divided into blocks and integrated into a cuboid. The image cuboid was scrambled between layers using the probability value sequence, and the 3D probability distribution matrix was used to complete the scrambling of the cross-section between layers. Finally, we converted each pixel value of the scrambled cuboid into a binary cube and controlled it to perform the rotation operation through the 3D probability magnitude matrix, then used the 3D quantum hash sequence to XOR the obtained cuboid image and tilted it to obtain the final encrypted image. The simulation results show that the image encryption scheme can resist various typical attacks and has good security performance.
- Item4D Printing in Biomedical Engineering: Advancements, Challenges, and Future Directions(MDPI AG, 2023-06-29) Ramezani, Maziar; Mohd Ripin, Zaidi4D printing has emerged as a transformative technology in the field of biomedical engineering, offering the potential for dynamic, stimuli-responsive structures with applications in tissue engineering, drug delivery, medical devices, and diagnostics. This review paper provides a comprehensive analysis of the advancements, challenges, and future directions of 4D printing in biomedical engineering. We discuss the development of smart materials, including stimuli-responsive polymers, shape-memory materials, and bio-inks, as well as the various fabrication techniques employed, such as direct-write assembly, stereolithography, and multi-material jetting. Despite the promising advances, several challenges persist, including material limitations related to biocompatibility, mechanical properties, and degradation rates; fabrication complexities arising from the integration of multiple materials, resolution and accuracy, and scalability; and regulatory and ethical considerations surrounding safety and efficacy. As we explore the future directions for 4D printing, we emphasise the need for material innovations, fabrication advancements, and emerging applications such as personalised medicine, nanomedicine, and bioelectronic devices. Interdisciplinary research and collaboration between material science, biology, engineering, regulatory agencies, and industry are essential for overcoming challenges and realising the full potential of 4D printing in the biomedical engineering landscape.
- Item60 years of creativity in business organizations(Design Research Society 2016, 2016-06) Sosa Medina, R; Connor, AM; Rive, PThis paper analyses the role of creativity in business organizations by examining the core ideas of an article published sixty years ago as a way to elucidate how relevant they are today in view of the research literature. The paper proposes the use of computational social simulations to support systematic reasoning about some of these longstanding issues around organizational creativity. An example of an agent-based simulation to study team ideation is presented to support systematic reasoning about the role of creativity in business organizations and to articulate future lines of inquiry.
- ItemA case study of authentic learning underpinned by design thinking and industry collaboration(DesignEd Asia Secretariat, 2013) Inder, S; Withell, AThis paper will present a case study of a year-two product design project that has been developed alongside the specific requirements of an industry collaborator and delivered within an innovative, research-led, Design Thinking (Brown, 2008) framework, providing an authentic learning experience for students. This tightly structured approach aimed to “engage students in real-world inquiry problems involving higher order thinking skills with an authentic audience beyond the classroom” (Rule, 2006), through the integration of industry orientated needs and constraints. The paper will discuss the overarching approach to the development of the project including the key principles and theories that underpin the curriculum. The paper then discusses collaboration with an industry expert to develop the pragmatic design and industry constraints focusing on economic feasibility, functional viability and product desirability. In addition, it includes a description of an innovative Design Thinking framework that has been developed as part of a PhD research project. The paper concludes with a discussion of the impact of this tightly constrained, authentic learning approach on the design expertise development of students. It also discusses the tensions in developing a learning and teaching approach for year two students that balances Design Thinking (empathising and radical idea generation) and pragmatic, constraint driven design.
- ItemA cellular automaton framework for within-field vineyard variance and grape production simulation(Institute of Electrical and Electronics Engineers (IEEE), 2011-07-26) Shanmuganathan, S; Narayanan, A; Robison, NWinegrowers for generations know it all too well that grapes harvested from different areas within a vineyard will produce wines of different flavours, mainly due to within-field variance in vine vigour caused by environmental variability from various factors, such as soil properties, microclimate conditions, and rootstock. Recent research attempts on the use of state-of-the-art technologies to model/ simulate within-field variance at a vineyard scale are outlined. Consequently, the paper illustrates a cellular automaton (CA) framework being developed for simulating the within-field variance in grapevine plant vigour, phenological events and vineyard production using random or real thematic mappings of likely key factors that contribute to the observed variance. The CA approach provides an alternative software tool to conventional crop estimation methods that are dependent upon expensive yield sampling methods.
- ItemA closed-form exact solution for pricing variance swaps with stochastic volatility(Wiley-Blackwell, 2011-04-01) Lian, GIn this paper, we present a highly efficient approach to price variance swaps with discrete sampling times. We have found a closed-form exact solution for the partial differential equation (PDE) system based on the Heston’s two-factor stochastic volatility model embedded in the framework proposed by Little and Pant. In comparison with the previous approximation models based on the assumption of continuous sampling time, the current research of working out a closed-form exact solution for variance swaps with discrete sampling times at least serves for two major purposes: (i) to verify the degree of validity of using a continuous-sampling-time approximation for variance swaps of relatively short sampling period; (ii) to demonstrate that significant errors can result from still adopting such an assumption for a variance swap with small sampling frequencies or long tenor. Other key features of our new solution approach include the following: (1) with the newly found analytic solution, all the hedging ratios of a variance swap can also be analytically derived; (2) numerical values can be very efficiently computed from the newly found analytic formula.
- ItemA collaborative learning trial between New Zealand and Sweden - using Lotus Notes Domino in teaching the concepts of Human Computer Interaction(ACM, 1999) Clear, TonyThis paper reports the results of a collaborative learning exercise between students at Auckland Institute of Technology and Uppsala University. The exercise was conducted using both a Lotus Notes Domino collaborative database and electronic mail to support students working in remote groups to perform a common task. Issues concerning the logistics of such an exercise, student participation and evaluations of the process, ethical considerations and the quality of the learning process are discussed. Some conclusions are drawn concerning the value of Group Ware technology to support this form of collaborative learning, and suggestions are made for future developments.
- ItemA combined optical, thermal and electrical performance model of a Building Integrated Photovoltaic/Thermal Concentrator (BIPVTC)(Electronics New Zealand/Massey University, 2011) Anderson, TN; Kunnemeyer, R; Duke, M; Carson, JKThe electrical output of concentrating photovoltaic devices is significantly affected by the temperature of the photovoltaic cells. The ability to actively cool photovoltaic cells under concentrated radiation allows their electrical efficiency to be maintained particularly during periods of high solar radiation when concentration offers the maximum benefit. In this study, the design of a novel photovoltaic/thermal solar concentrator for building integration (BIPVTC) is discussed. The optical, thermal and electrical performance of the collector was theoretically modelled and validated with experimental data. The results show that BIPVTC offers improved electrical yields from both concentrating radiation onto the photovoltaic cells and also by actively cooling them.
- ItemA Comparative Analysis of Opinion Mining and Sentiment Classification in Non-english Languages(IEEE, 2013-12-11) Medagoda, N; Shanmuganathan, S; Whalley, JLIn the past decade many opinion mining and sentiment classification studies have been carried out for opinions in English. However, the amount of work done for non-English text opinions is very limited.In this review, we investigate opinion mining and sentiment classification studies in three non-English languages to find the classification methods and the efficiency of each algorithm used in these methods. It is found that most of the research conducted for non-English has followed the methods used in the English language with onlylimited usage of language specific properties, such as morphological variations. The application domains seem to be restricted to particular fields and significantly less research has been conducted in cross domains. Keywords—Natural Language processing, Text mining, Machine Learning.
- ItemA comparison of computational techniques of the key properties of Markov Chains(Australia and New Zealand Industrial and Applied Mathematics (ANZIAM), 2015-02-01) Hunter, JJThe presenter has recently been exploring the accurate computation of the stationary distribution for finite Markov chains based upon the Grassman, Taksar and Heyman (GTH) algorithm () with further extensions of this procedure, based upon the ideas of Kohlas (), for finding the mean first passage time matrix. The methods are numerically stable as they do not involve subtraction. In addition, a number of perturbation techniques, where the rows of the transition matrix are sequentially updated, are also considered for computing these quantities. These techniques, together with some standard techniques using matrix inverses and generalized inverses, are compared for accuracy, using some test problems from the literature. References: [1} Grassman W.K., Taksar M.I., and Heyman D.P., Regenerative analysis and steady state distributions for Markov chains, Oper. Res. 33, (1985), 1107-1116.  Kohlas J. Numerical computation of mean first passage times and absorption probabilities in Markov and semi-Markov models, Zeit fur Oper Res, 30, (1986), 197-207.
- ItemA comparison of nonlinear control performance assessment techniques for nonlinear processes(Wiley-Blackwell, 2012) Yu, W; Wilson, DI; Young, BRAssessing the quality of industrial control loops is an important auditing task for the control engineer. However, there are complications when considering the ubiquitous nonlinearities present in many industrial control loops. If one simply ignores these nonlinearities, there is the danger of over-estimating the performance of the control loop in rejecting disturbances and thereby possibly overlooking loops that need attention. To address this problem, several techniques have been recently developed to extend the control performance assessment (CPA) of single input/single output linear systems to nonlinear systems. This article surveys these nonlinear CPA techniques and compares their performances using three case studies. These results can be used to guide control engineers to select the most suitable CPA techniques for their particular applications.
- ItemA comparison of teacher and lecturer perspectives on the transition from secondary to tertiary mathematics education(Taylor & Francis, 2009) Hong, Y; Kerr, S; Klymchuk, S; McHardy, J; Murphy, P; Spencer, S; Thomas, M; Watson, PThe transition from school to tertiary study of mathematics comes under increasing scrutiny in research. This article reports on some findings from a project analysing the transition from secondary to tertiary education in mathematics. One key variable in this transition is the teacher or lecturer. This article deals with a small part of the data from the project – analysing secondary teachers’ and lecturers’ responses to questions on the differences they perceive between school and university and the importance of calculus, a bridging content. The results provide evidence of similarities and differences in the thinking of teachers and lecturers about the transition process. They also show that each group lacks a clear understanding of the issues involved in the transition from the other’s perspective, and there is a great need for improved communication between the two sectors.
- ItemA comparison of two methods applied to the optimisation of fluid power circuits(Research Studies Press, 1997-09-10) Connor, AM; Tilley, DGThis paper describes two optimisation methods which can be applied to the parameter selection stage of Fluid Power System design. These two methods used are a Genetic Algorithm (GA) and a Tabu Search method, both of which have been claimed to be truely global methods. GAs are a method inspired by natural selection and Darwinian evolution whilst Tabu Search is an aggressive search metaheuristic which guides local search methods towards the globally optimum solution. Results are presented for two different circuit optimisation tasks. These results show that each of the two methods have both advantages and disadvantages.
- ItemA Comprehensive Multi-functional Controller for Hybrid Energy Storage Systems in DC Microgrids(Institute of Electrical and Electronics Engineers (IEEE), 2023-02-09) Lin, Xin; Zamora, Ramon; Baguley, Craig A
- ItemA computational theory of human perceptual mapping(Cognitive Science Society, 2011-07) Yeap, WKThis paper presents a new computational theory of how humans integrate successive views to form a perceptual map. Traditionally, this problem has been thought of as a straightforward integration problem whereby position of objects in one view is transformed to the next and combined. However, this step creates a paradoxical situation in human perceptual mapping. On the one hand, the method requires errors to be corrected and the map to be constantly updated, and yet, on the other hand, human perception and memory show a high tolerance for errors and little integration of successive views. A new theory is presented which argues that our perceptual map is computed by combining views only at their limiting points. To do so, one must be able to recognize and track familiar objects across views. The theory has been tested successfully on mobile robots and the lessons learned are discussed.
- ItemA conceptual framework to evaluate suppliers for building infrastructure in the Malaysian electricity supply industry(Universiti Teknologi Malaysia (UTM), 2012) Thiruchelvam, S; Tookey, JE; Rotimi, J.O.B.; Samarasinghe, DAS; Mustapha, KN; Kadirgama, KIn the current competitive business environment the relationship between buyers and suppliers is no longer antagonistic. Emphasis has shifted to the forging of partnerships that benefits all parties in any business setting. The emergence of supply chain concepts have brought about the realization of long-term cooperation based on mutual trusts. Frequently high priority is given towards suppliers that are able to deliver, and are committed to buyer’s business objectives. However, proper supplier selection is pertinent to meeting these business objectives as it dictates operational and financial positions. The current study discusses a construct that could facilitate supplier selection in a typical government linked company. It presents the key items that could be considered in a supplier selection metric using a comprehensive approach. The study is an aspect of a doctoral research programme that aims to develop a supplier selection model for an electricity supply organization. The paper concludes that having a good set of supplier selection metric is of critical importance to business success in any supply chain.