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A new multi-resolution closed-loop wind power forecasting method

- Nejati, Maryam, Amjady, Nima, Zareipour, Hamidreza

  • Authors: Nejati, Maryam , Amjady, Nima , Zareipour, Hamidreza
  • Date: 2023
  • Type: Text , Journal article
  • Relation: IEEE Transactions on Sustainable Energy Vol. 14, no. 4 (2023), p. 2079-2091
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  • Description: By the increasing number and size of wind farms, wind generation forecasting has become a basic requirement for their connection to the power grid; otherwise, power system operators and electricity market participants cannot make the right decisions and may incur significant costs and penalties. In this paper, a new multi-resolution closed-loop wind power forecasting method with a difference signal feedback loop is proposed. Within the proposed method, wind power is initially predicted in two different resolutions (such as with hourly and sub-hourly time steps) by two low/high-resolution pre-predictors and then the inconsistency between their predictions is measured through the difference signal. The generated difference signal is used as a guide for the two low/high-resolution wind power post-predictors. If their wind power forecasts are inconsistent, the difference signal is updated and used as the feedback for the low/high-resolution post-predictors. This closed-loop forecasting-updating process is iterated until the post-predictors reach consistent results. To evaluate the performance of the proposed multi-resolution closed-loop method, it is tested on two different real-world wind farms and the results are compared with the results of several other widely used/recently published wind power forecast methods using various error metrics and different forecast horizons. © 2010-2012 IEEE.

A new species of Troglopedetes Joseph, 1872 with eyes (Collembola, Paronellidae) from a Christmas Island Cave, Australia

- Cipola, Nikolas, Greenslade, Penelope

  • Authors: Cipola, Nikolas , Greenslade, Penelope
  • Date: 2023
  • Type: Text , Journal article
  • Relation: Zootaxa Vol. 5239, no. 4 (2023), p. 563-577
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  • Description: A new species of Troglopedetes Joseph from a Christmas Island Cave, Australia is described and illustrated here. Troglopedetes eberhardi sp. nov. resembles other species by presence of eyes and dorsal chaetotaxy of the second thoracic segment to third abdominal segment, but differs in head chaetotaxy, fourth abdominal segment and elongated unguis median tooth, which character is documented here in the genus for the first time. A comparison and identification key for all eyed species is provided. This is the first record of Troglopedetes for Australia and the genus now has 37 nominal species, of which nine have eyes. Copyright © 2023 Magnolia Press.

A new tour on the subdifferential of the Supremum function

- Hantoute, Abderrahim, López-Cerdá, Marco

A Novel Common Grounded Type 1-\varphi Five-Level Boost PV Inverter with Reduced Device Count

- Ardashir, Jaber, Ghadim, Hadi, Heydari, Dorsa, Hu, Jiefeng

  • Authors: Ardashir, Jaber , Ghadim, Hadi , Heydari, Dorsa , Hu, Jiefeng
  • Date: 2023
  • Type: Text , Conference paper
  • Relation: 8th International Conference on Technology and Energy Management, ICTEM 2023, Babol, Iran, 8-9 February 2023, 8th International Conference on Technology and Energy Management, ICTEM 2023
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  • Description: Common-grounded multi-level inverters with the input voltage boost ability are more common for grid-tied PV system applications. In this paper, a new five-level inverter topology is introduced that can generate a five-level voltage at the output stage, statically increase the input voltage, fully transfer the reactive power, eliminate the leakage current due to common-grounded capability, reduce the number of the power electronic components, self-balancing capability of switched capacitors voltage based on operation modes, and equality of switched capacitors voltage. The operation of the proposed inverter along with its comparison with other similar inverter topologies and the simulation results of the proposed inverter under different loads are demonstrates in this paper. The results indicate that the performance of the proposed inverter in the grid-connected PV system is best than other compared topologies. Also, experimental results with a prototype have been presented, which validates the simulation results and proves the applicability of the proposed inverter in grid-tied PV systems. © 2023 IEEE.

A novel continuous control set model predictive control for lc-filtered three-phase four-wire three-level voltage-source inverter

- Yang, Yong, Xiao, Yang, Fan, Mingdi, Wang, Kaixin, Zhang, Xinan, Hu, Jiefeng, Fang, Gang, Zeng, Weibo, Vazquez, Sergio, Rodriguez, Jose

  • Authors: Yang, Yong , Xiao, Yang , Fan, Mingdi , Wang, Kaixin , Zhang, Xinan , Hu, Jiefeng , Fang, Gang , Zeng, Weibo , Vazquez, Sergio , Rodriguez, Jose
  • Date: 2023
  • Type: Text , Journal article
  • Relation: IEEE Transactions on Power Electronics Vol. 38, no. 4 (2023), p. 4572-4584
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  • Description: In this article, a novel continuous control set model predictive control (CCS-MPC) is proposed for an LC-filtered three-phase three-level four-wire voltage-source inverter (3P-4W-3L-VSI). The proposed MPC algorithm provides independent control of each phase of the 3P-4W-3L-VSI under various unbalanced load conditions, which shows superior performance under unbalanced loads. Furthermore, different from conventional MPC methods, the CCS-MPC achieves fixed switching frequency, hence simplifying the design of LC filters. In addition, dc offsets are introduced to the proposed modulation to effectively balance the neutral-point voltage of the 3P-4W-3L-VSI. Experimental results are presented to verify the effectiveness of the proposed MPC algorithm. © 1986-2012 IEEE.

A novel optimization approach towards improving separability of clusters

- Bagirov, Adil, Hoseini-Monjezi, Najmeh, Taheri, Sona

  • Authors: Bagirov, Adil , Hoseini-Monjezi, Najmeh , Taheri, Sona
  • Date: 2023
  • Type: Text , Journal article
  • Relation: Computers and Operations Research Vol. 152, no. (2023), p.
  • Relation: http://purl.org/au-research/grants/arc/DP190100580
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  • Description: The objective functions in optimization models of the sum-of-squares clustering problem reflect intra-cluster similarity and inter-cluster dissimilarities and in general, optimal values of these functions can be considered as appropriate measures for compactness of clusters. However, the use of the objective function alone may not lead to the finding of separable clusters. To address this shortcoming in existing models for clustering, we develop a new optimization model where the objective function is represented as a sum of two terms reflecting the compactness and separability of clusters. Based on this model we develop a two-phase incremental clustering algorithm. In the first phase, the clustering function is minimized to find compact clusters and in the second phase, a new model is applied to improve the separability of clusters. The Davies–Bouldin cluster validity index is applied as an additional measure to compare the compactness of clusters and silhouette coefficients are used to estimate the separability of clusters. The performance of the proposed algorithm is demonstrated and compared with that of four other algorithms using synthetic and real-world data sets. Numerical results clearly show that in comparison with other algorithms the new algorithm is able to find clusters with better separability and similar compactness. © 2022

A realist evaluation of post-implementation modifications : a context-initiative-mechanism-outcome perspective

- Oseni, Taiwo, Rahim, Mahbubur, Foster, Susan

  • Authors: Oseni, Taiwo , Rahim, Mahbubur , Foster, Susan
  • Date: 2023
  • Type: Text , Journal article
  • Relation: Journal of Critical Realism Vol. 22, no. 4 (2023), p. 645-669
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  • Description: This paper exemplifies a theoretical and methodological evaluation of IT Initiatives. It discusses post-implementation modifications (ERP-PIM) to enterprise resource planning (ERP) systems for the purpose of business process optimization (BPO) from a Context-Initiative-Mechanism-Outcome (CIMO) perspective. CIMO suggests that context and mechanisms are factors triggering causal effects responsible for outcomes derived from technology initiatives. Through conceptualization, data collection/analysis, and retroduction, the paper proposes a middle-range theory to facilitate the explanation of outcomes from diverse post-implementation initiatives. Data from multiple case study identifies situational and action-formation mechanisms, and actions as essential to realizing the desired outcomes. The proposed ERP-PIM-CIMO theory encapsulates: (i) Business Process Optimization (BPO) as context, (ii) ERP-PIM as structure, (iii) Business Process Efficiency, Effectiveness, and Flexibility as observable events, (iv) ERP capability as causal mechanism, (v) actions as necessary for the actualization of mechanism, and finally (vi) effort and cost, knowledge, and training as factors influencing actualization. © 2023 Informa UK Limited, trading as Taylor & Francis Group.

A reconfigurable rectifier-based power improving method of free-standing two-coil magnetic field energy harvesters over a wide load range

- Li, Yong, Yan, Yihua, Yang, Huanyu, Hu, Jiefeng, He, Zhengyou

  • Authors: Li, Yong , Yan, Yihua , Yang, Huanyu , Hu, Jiefeng , He, Zhengyou
  • Date: 2023
  • Type: Text , Journal article
  • Relation: IEEE Transactions on Power Electronics Vol. 38, no. 5 (2023), p. 5638-5643
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  • Description: Free-standing magnetic field energy harvesters (FSMFEHs) have promising potential in charging sensors used in electrical power grids. The output power of the FSMFEH is highly dependent on the load resistance. However, the load resistance of the sensors varies over a wide range during the operation process. Therefore, a crucial challenge for an FSMFEH system is to maintain high output power over a wide load range. In this letter, an innovative reconfigurable rectifier-based FSMFEH system with two coils connected in parallel is proposed. First, a new structure of two identical coils in parallel is proposed in magnetic energy harvesting applications. Then, a reconfigurable rectifier with two operation modes is developed to incorporate the new coil structure. By switching between the full-bridge mode and the half-bridge mode according to the actual load demand, the proposed FSMFEH can maintain high output power over a wide load range. In addition, the mode transition can be easily achieved by shorting one of the diodes, leading to a simple and low-loss control. The effectiveness of the proposed FSMFEH system is verified based on a laboratory prototype. It is provided that the experimental result is consistent with the theoretical analysis. The output power can be maintained above 8.19 mW within the 50-1500

A roadmap for change : charting the course of gifted educational provision in Lebanon

- Antoun, Maya, Plunkett, Margaret

  • Authors: Antoun, Maya , Plunkett, Margaret
  • Date: 2023
  • Type: Text , Journal article
  • Relation: International Journal of Educational Reform Vol. 32, no. 3 (2023), p. 279-293
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  • Description: This article reviews and further develops understandings gleaned from an investigation of public and private school teachers’ perceptions of talent development and their ability to implement specialized approaches for gifted students in a country without specific educational policies for this population. Through a discussion of findings from a previous study investigating the perceptions and practices of more than 280 Lebanese teachers, new insights to inform future policy are provided into how talent development is perceived and responded to within the Lebanese educational context. These understandings helped inform the development of a culturally appropriate conceptual framework, derived from Gagné's Differentiated Model of Giftedness and Talent (2008). The resultant framework addresses how the broader socio-economic cultural context within Lebanon appears to have influenced teachers’ perceptions and practices and the choices made in terms of gifted provision in classrooms. This framework could assist educational leaders in Lebanon to implement changes that would not only benefit gifted learners but also have potential flow on benefits for the country as a whole. © The Author(s) 2023.

A robust ensemble regression model for reconstructing genetic networks

- Gamage, Hasini, Chetty, Madhu, Lim, Suryani, Hallinan, Jennifer, Nguyen, H.

  • Authors: Gamage, Hasini , Chetty, Madhu , Lim, Suryani , Hallinan, Jennifer , Nguyen, H.
  • Date: 2023
  • Type: Text , Conference paper
  • Relation: 2023 International Joint Conference on Neural Networks, IJCNN 2023 Vol. 2023-June
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  • Description: Genetic networks contain important information about biological processes, including regulatory relationships and gene-gene interactions. Numerous methods, using high-dimensional gene expression data have been developed to capture these interactions. These gene expression data, generated using high-throughput technologies, are prone to noise. However, most existing network inference methods are unable to cope with noisy data, making genetic network reconstruction challenging. In this paper, we propose a novel ensemble regression model combining quantile regression and cross-validated Ridge regression, RidgeCV, to infer interactions from noisy gene expression data. The application of quantile regression to GRN inference is novel, and its design makes it appropriate for noisy data. RidgeCV also addresses other important issues, such as data overfitting and multicollinearity. First, each regression method is independently applied to gene expression data and the output of these methods, in the form of ranked gene lists, is aggregated using a novel gene score-based method by considering the gene rank and model importance. The model importance score is evaluated based on an adjusted coefficient of determination. This method implicitly includes majority voting by averaging each gene score value across all models. The proposed model was tested on the DREAM4 datasets and publicly available small-scale real-world network datasets. Experiments with noisy datasets showed that the proposed ensemble model is more accurate and efficient than other state-of-the-art methods. © 2023 IEEE.

A robust local texture descriptor in the parametric space of the weibull distribution

- Tania, Sheikh, Karmakar, Gour, Teng, Shyh, Murshed, Manzur

  • Authors: Tania, Sheikh , Karmakar, Gour , Teng, Shyh , Murshed, Manzur
  • Date: 2023
  • Type: Text , Journal article
  • Relation: IEEE Transactions on Multimedia Vol. 25, no. (2023), p. 6053-6066
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  • Description: Research in texture feature approximation is still in the embryonic stage because of difficulties in developing a sound theoretical model to express the unique pattern in the intensity-variation of pixels in the neighbourhood of the pixel-of-interest so that it can sufficiently discriminate different textures. Local texture descriptors are widely used in image segmentation as they comprise pixel-wise features. The Weber local descriptor (WLD) with differential excitation and gradient orientation components, inspired by Weber's Law, has been leveraged in the state-of-the-art iterative contraction and merging (ICM) image segmentation technique. However, WLD has inherent drawbacks in the formulation of the components that limit its discriminatory capability. This paper introduces a novel texture descriptor by directly modelling the distribution of intensity-variation in the parametric space of the Weibull distribution using its shape and scale parameters. A unified 'joint scale' texture property is introduced, which can discriminate textures better than the individual parameters while keeping the length of the descriptor shorter. Additionally, the accuracy of WLD's gradient orientation component is improved by using an extended Sobel operator and expressing gradients in -

A Scoping review of autism and the way it changes the presentation of suicidal thoughts and behavior compared to the general population

- Cleary, Michelle, West, Sancia, McLean, Loyola, Hunt, Glenn, Hungerford, Catherine, Kornhaber, Rachel

  • Authors: Cleary, Michelle , West, Sancia , McLean, Loyola , Hunt, Glenn , Hungerford, Catherine , Kornhaber, Rachel
  • Date: 2023
  • Type: Text , Journal article
  • Relation: Issues Mental Health Nursing Vol. 44, no. 4 (2023), p. 282-301
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  • Description: Autism spectrum conditions are a group of neurodevelopmental conditions that carries an array of co-occurring diagnoses, including a heightened risk of suicide attempts and suicide. This scoping review examined primary research focusing on autism and suicidality, to understand what is currently known on the topic, including how autism changes the presentation of suicidal thoughts and behavior and to assess the suicide awareness and prevention education programs currently available for autistic people, their families, and health professionals and support workers. A comprehensive search (November 2021) across Scopus, PubMed and CINAHL identified 39 articles from 38 studies. Three themes emerged, with five subthemes. 1. The prevalence of suicidality in autistic people 2. The presentation of suicidality in autistic people, including (a) risk of suicidality (b) gender, age, employment and education (c) co-occurring psychiatric conditions (d) autism traits and social communication (e) intellectual disability and 3. Autism-specific approaches to suicidal thoughts, behavior and prevention. Findings were mixed, including conflicting evidence on the risk of autism and suicidality, and limited evidence of resources related to autism-specific suicide awareness or information, and education or prevention programs.

A simultaneous power and data transmission technology based on coil multiplexing in domino-resonator WPT systems

- Li, Yong, Yang, Xiao, Sun, Wenjun, Hu, Jiefeng, He, Zhengyou

  • Authors: Li, Yong , Yang, Xiao , Sun, Wenjun , Hu, Jiefeng , He, Zhengyou
  • Date: 2023
  • Type: Text , Journal article
  • Relation: IEEE Transactions on Power Electronics Vol. 38, no. 3 (2023), p. 2878-2883
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  • Description: To achieve parallel power and data transmission in domino-resonator wireless power transfer (WPT) systems, a novel simultaneous power, and data transfer (SPDT) technology based on coil multiplexing is proposed in this letter. Benefiting from the magnetic field characteristics of the bipolar coil structure, the power and data can be injected into multiplexed coils with different flow directions, leading to opposite induced voltage polarities in each coupling coil. Subsequently, a corresponding resonator circuit is developed to form independent power and data resonance loops. In addition, an injected data transmission scheme is developed for domino-resonator WPT systems. Compared with traditional SPDT methods, additional wave trappers and coupling structures are avoided by this proposed technology, and the interference between power and data transfer is significantly eliminated. A 23.6 W laboratory prototype with five domino resonators is built to validate the feasibility of this proposed technology. The experimental results show that the power transfer efficiency reaches 70% at 50 kb/s data transfer rate. © 1986-2012 IEEE.

A study into the impact of data breaches of electronic health records

- Pilla, Ravi, Oseni, Taiwo, Stranieri, Andrew

A study of teacher educators’ work : complexity and confrontation

- McDonough, Sharon, Brandenburg, Robyn, Moran, Wendy

  • Authors: McDonough, Sharon , Brandenburg, Robyn , Moran, Wendy
  • Date: 2023
  • Type: Text , Journal article
  • Relation: Educational Forum Vol. 87, no. 4 (2023), p. 334-346
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  • Description: Using pedagogical confrontations as a lens for a study of teacher educator work, we identify the way that teacher educator practice is mediated by teacher educator values and beliefs. We highlight the ways that an examination of these confrontations provides greater understanding of the pedagogy, practice, and decision-making of teacher educators and contend that analysis of practice is vital to revealing the complexity of teacher educator work. © 2023 Kappa Delta Pi.

A survey on image classification of lightweight convolutional neural network

- Liu, Ying, Xiao, Peng, Fang, Jie, Zhang, Dengsheng

  • Authors: Liu, Ying , Xiao, Peng , Fang, Jie , Zhang, Dengsheng
  • Date: 2023
  • Type: Text , Conference paper
  • Relation: 19th International Conference on Natural Computation, Fuzzy Systems and Knowledge Discovery, ICNC-FSKD 2023, Harbin, China, 29-31 July 2023, 2023 19th International Conference on Natural Computation, Fuzzy Systems and Knowledge Discovery (ICNC-FSKD)
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  • Description: In recent years, deep neural networks have achieved tremendous success in image classification in both academic and industrial settings. However, the high hardware requirements imposed by their intensive and complex computations pose a challenge for deployment on low-storage devices. To address this challenge, lightweight networks provide a viable solution. This paper provides a detailed review of recent lightweight image classification algorithms, which can be categorized into low-redundancy network model design and neural network compression algorithms. The former reduces network computations by replacing traditional convolution with efficient lightweight convolution, while the latter reduces redundancy in the network by employing methods such as network pruning, knowledge distillation, and parameter quantization. We summarize the experimental results of some classical models and algorithms on ImageNet2012 and CIFAR-10 datasets, and analyze the characteristics, advantages and disadvantages of these models respectively. Finally, future research directions for lightweight algorithms in the field of image classification are identified. © 2023 IEEE.

A three-stage developmental pathway for human V

- Perriman, Louis, Tavakolinia, Naeimeh, Jalali, Sedigheh, Li, Shuo, Hickey, Peter, Amann-Zalcenstein, Daniela, Ho, William, Baldwin, Tracey, Piers, Adam, Konstantinov, Igor, Anderson, Jeremy, Stanley, Edouard, Licciardi, Paul, Kannourakis, George, Naik, Shalin, Koay, Hui-Fern, Mackay, Laura, Berzins, Stuart, Pellicci, Daniel

Aboriginal use of fire as a weapon in Colonial Victoria : a preliminary analysis

- Clark, Ian, Cahir, David (Fred), Wilkie, Benjamin, Tout, Dan, Clark, Jidah

  • Authors: Clark, Ian , Cahir, David (Fred) , Wilkie, Benjamin , Tout, Dan , Clark, Jidah
  • Date: 2023
  • Type: Text , Journal article
  • Relation: Australian Historical Studies Vol. 54, no. 1 (2023), p. 109-124
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  • Description: The use of fire as an offensive and defensive weapon on the colonial frontier in Australia has received little scholarly attention. This article aims to build on insights from current historiography about the customary use of fire by Aboriginal peoples within the borders of Victoria, Australia. Specifically, our aim is to highlight the historically significant role Aboriginal peoples’ use of fire played in resisting the colonists in Victoria during the colonial period. By closely scrutinising documentary records it is possible to demonstrate that Aboriginal people used fire, both offensively and defensively, against the colonists. © Editorial Board, Australian Historical Studies 2023.

Adaptive capacity task offloading in multi-hop D2D-based social industrial IoT

- Ibrar, Muhammad, Wang, Lei, Akbar, Aamir, Jan, Mian, Balasubramanian, Venki, Muntean, Gabriel-Miro, Shah, Nadir

  • Authors: Ibrar, Muhammad , Wang, Lei , Akbar, Aamir , Jan, Mian , Balasubramanian, Venki , Muntean, Gabriel-Miro , Shah, Nadir
  • Date: 2023
  • Type: Text , Journal article
  • Relation: IEEE Transactions on Network Science and Engineering Vol. 10, no. 5 (2023), p. 2843-2852
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  • Description: Traditional communication technologies such as cellular networks are facing problems to support high service quality when used for time-critical applications in an Industrial Internet-of-Things (IIoT) context, including real-time data transmission, route dependability, and scalability. To address these problems, device-to-device (D2D) communications based on social relationships can be used, which allow for task-offloading: resource-rich devices share unused computing resources with resource constraint devices. However, unbalanced task offloading in Social IIoT (SIIoT) might actually degrade the overall system performance, which is not desirable. In this paper, we propose an adaptive capacity task offloading solution for D2D-based social industrial IoT (ToSIIoT) which considers devices utilization ratio and strength of social relationships in order to improve resource utilization, increase QoS and achieve better task completion rate. The proposed approach consists of three aspects: social-aware relay selection in a multi-hop D2D communication context, choice of a resource-rich SIIoT device for task offloading, and adaptive redistribution of tasks. The paper proposes heuristic algorithms, as finding optimal solutions to the problems are NP-hard. Extensive experimental results show that the proposed ToSIIoT performs better than existing approaches in terms of utilization ratio, QoS violation, average execution delay, and task completion ratio. © 2013 IEEE.

Adolescent substance use and high school noncompletion : exploring the nature of the relationship using a discordant twin design

- Davis, Christal, Gizer, Ian, Lynskey, Michael, Statham, Dixie, Heath, Andrew, Martin, Nicholas, Slutske, Wendy

  • Authors: Davis, Christal , Gizer, Ian , Lynskey, Michael , Statham, Dixie , Heath, Andrew , Martin, Nicholas , Slutske, Wendy
  • Date: 2023
  • Type: Text , Journal article
  • Relation: Addiction Vol. 118, no. 1 (2023), p. 167-176
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  • Description: Background and Aims: Previous studies have demonstrated associations between substance use and reduced educational attainment; however, many were unable to account for potential confounding factors like genetics and the rearing environment. In the few studies that controlled for these factors, the substances assessed were limited to alcohol, cannabis, and tobacco. To address these limitations, we examined the relationship between adolescent use of seven kinds of substances, the number of additional substances used, and high school noncompletion within a large sample of Australian twins. Design: A series of two-level generalized mixed effects logistic regressions were conducted to examine associations between adolescent substance use and high school noncompletion. Setting: Australia. Participants: A total of 9579 adult Australian twins from two cohorts of the Australian Twin Registry. Measurements: Assessments of high school completion, childhood major depression, conduct disorder symptoms, substance use initiation, demographics, and parental educational attainment using the Australian version of the Semi-Structured Assessment for the Genetics of Alcoholism. Findings: There were unique within-twin-pair effects of use of sedatives (odds ratio [OR] = 22.39 [95% confidence interval (CI) = 1.18–423.48]) and inhalants/solvents (OR = 10.46 [95% CI = 1.30–84.16]) on high school noncompletion. The number of substances used in adolescence was strongly associated with high school noncompletion across all discordant twin models (ORs from 1.50–2.32, Ps < 0.03). Conclusions: In Australia, adolescent substance use appears to be associated with early school dropout, with the effects of any given substance largely because of the confounding factors of parental education, childhood conduct disorder symptoms, and use of other substances. Sedatives and inhalants/solvents have effects on high school noncompletion that cannot be explained by polysubstance use or familial factors. © 2022 Society for the Study of Addiction.