cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Bernoulli and Faulhaber
Creators: name: Cereceda, José L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics

description: In a recent work, Zielinski used Faulhaber's formula to explain why the odd Bernoulli numbers are equal to zero. Here, we assume that the odd Bernoulli numbers are equal to zero to explain Faulhaber's formula.
description: 5 pages; published version
Improving the Effectiveness of Traceability Link Recovery using Hierarchical Bayesian Networks
Creators: name: Moran, Kevin
name: Palacio, David N.
name: Bernal-Cárdenas, Carlos
name: McCrystal, Daniel
name: Poshyvanyk, Denys
name: Shenefiel, Chris
name: Johnson, Jeff
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Traceability is a fundamental component of the modern software development process that helps to ensure properly functioning, secure programs. Due to the high cost of manually establishing trace links, researchers have developed automated approaches that draw relationships between pairs of textual software artifacts using similarity measures. However, the effectiveness of such techniques are often limited as they only utilize a single measure of artifact similarity and cannot simultaneously model (implicit and explicit) relationships across groups of diverse development artifacts. In this paper, we illustrate how these limitations can be overcome through the use of a tailored probabilistic model. To this end, we design and implement a HierarchiCal PrObabilistic Model for SoftwarE Traceability (Comet) that is able to infer candidate trace links. Comet is capable of modeling relationships between artifacts by combining the complementary observational prowess of multiple measures of textual similarity. Additionally, our model can holistically incorporate information from a diverse set of sources, including developer feedback and transitive (often implicit) relationships among groups of software artifacts, to improve inference accuracy. We conduct a comprehensive empirical evaluation of Comet that illustrates an improvement over a set of optimally configured baselines of $\approx$14% in the best case and $\approx$5% across all subjects in terms of average precision. The comparative effectiveness of Comet in practice, where optimal configuration is typically not possible, is likely to be higher. Finally, we illustrate Comets potential for practical applicability in a survey with developers from Cisco Systems who used a prototype Comet Jenkins plugin.
description: Accepted in the Proceedings of the 42nd International Conference on Software Engineering (ICSE'20), 13 pages
The interfaith ecology movement
Creators: name: Rider, Elyse Joanne
Publisher: name: Monash University
Year: 2017
Subjects: Uncategorized

description: The multicultural city of Melbourne, situated in the ecologically vulnerable state of Victoria, Australia, provides the research context for this qualitative study of the ‘interfaith ecology movement.’ This emerging New Social Movement under globalisation brings together the themes of religion, diversity, environmentalism and peace. It is situated at the intersection of the contemporary interfaith dialogue and the environment movements. This research is an ethnographic exploration of the fledgling cultural forms, structures, practices, motivations and challenges of this global grassroots community movement as it develops. The ecophilosophical position of panpsychism provides the ethical, epistemological and ontological framework for this research. It informs the principles of the research methodology through which the eco-spiritual themes as well as the social, cultural and interpersonal relationships that characterise the interfaith ecology movement are explored. Research was carried out between 2007 – 2010 primarily through engaging community groups and organisations working on interfaith ecology themes into Participatory Action Research projects and activities. This study discloses aspects of Australia’s subtle and elusive spirituality, as well as local postcolonial and ecological identity politics at play with cosmopolitan spiritual and ecological experiences and identities. This study is therefore broadly relevant to the contemporary context of civic participation, environmental action and spiritual exploration under globalisation. Through its organisations and projects, the interfaith ecology movement generates both inspiration and friction as participants navigate each other’s differences in the complex process of project planning and practical action. Often hampered by cross-purposes in the development stages, these projects frequently reach a creative synergy, bridging the divides between participants. Perpetual learning and compromise characterises the practice of the movement as participants bear witness to the surfacing of an authentic dialogue of difference in the often muddy waters of social, spiritual and ecological change.
Numerical investigation of the gas and particle dynamics during the cold spray process.
Creators: name: Li, Shuo
Publisher: name: Monash University
Year: 2017
Subjects: Uncategorized

description: The present numerical investigation of the cold spray process examines the gas and particle dynamics both inside and outside the nozzle in the context of improving particle deposition. In the first part of the investigation, the one-dimensional isentropic relations coupled with the drag force acting on a particle is employed in a parametric study of the nozzle performance. Next, the addition of a barrel section to the end of the nozzle is proposed and shown to be more efficient in some cases than using the diverging section of the nozzle for particle acceleration. Finally, the effect of nozzle wall friction is incorporated to assess the amount of deviation from the isentropic model. The gas and particle dynamics between the nozzle and substrate during the steady cold spray process is the focus of the second part of the investigation. An underexpanded and overexpanded nozzle is employed to accelerate the particles and the operating conditions were set to those used in the validation cases. The particle impact statistics are extracted to provide information on the particle impact speed, angle and location. The particles are also tracked during their flight between the nozzle and substrate to characterise their response to changes in the gas flow. It was found that the variation in particle speed across the embedded shock structures became minimal as the diameter increased. For particles with a Stokes number greater than one, the nozzle exit velocity may be used as an approximation of the impact speed. A theoretical model is also proposed for calculating the particle impact speed using the nozzle exit conditions. The deployment of the shock tube in cold spray is a recent innovation in which a planar shock is released into the ambient air towards a substrate while the particles are injected across the wake of the shock. Although the process suffers from a number of practical limitations, monodisperse particles are used to compare the impact speed produced by steady and unsteady cold spray processes. It was found that this process also offers a mean of studying the shock formation process in underexpanded impinging jets. The shock speeds were selected such that either a shock diamond or Mach disk is reproduced in the impingement region characteristic of a moderately and highly underexpanded jet. Although the unsteady cold spray process requires a much lower driving pressure to produce the impact speeds found during the steady process, there are several practical limitations associated with it.
Facing Kirinyaga: philanthropic tourism in rural Kenya
Creators: name: Lacey, Gary Terence
Publisher: name: Monash University
Year: 2017
Subjects: Uncategorized

description: The under researched genre of Philanthropic Tourism, which sees holidaymaking paired with philanthropy through visits to charitable field projects forms the focus of this study. While the class is closely related to volunteer tourism it differs in that not all visitors are volunteers but they are either existing supporters of the project or are regarded by the charity as potential future supporters. An examination is conducted of a philanthropic visitor program at a now defunct school and AIDS orphanage in an impoverished region of Kenya's Central Highlands. In order to investigate the Philanthropic Tourism experience, the impacts of visits on relevant stakeholders and the effectiveness of tourism as a partner in poverty alleviation, an ethnographic, case-study approach was adopted in which the researcher embedded himself in the school and the local community for a period of three months. To supplement the field research, interviews were conducted with past visitors and visitor blogs and vlogs were examined, as were official documents. The study reveals several barriers to poverty alleviation through philanthropic involvement as well as key success factors in incorporating tourism into a charitable field project's activities. In addition, a number of theories in the social sciences and tourism are engaged and expanded upon as a result of the study and comments are made regarding the sustainability of the tourism type.
Minimal generating set of planar moves for surfaces embedded in the four-space
Creators: name: Jablonowski, Michal
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: We derive a minimal generating set of planar moves for diagrams of surfaces embedded in the four-space. These diagrams appear as the bonded classical unlink diagrams.
description: 13 pages, final vesion. arXiv admin note: text overlap with arXiv:1808.07652
Mobilizing learning: transforming pedagogy with mobile web 2.0
Creators: name: Cochrane, Thomas Donald
Publisher: name: Monash University
Year: 2017
Subjects: Uncategorized

description: This thesis reports on three years of action research mlearning (mobile learning) projects encompassing five different courses, forming five case studies spanning from one to three years of implementation and refinement. The five case studies involved thirteen mlearning projects undertaken between 2007 and 2009 with a total of 280 participants. The aim of the research was to investigate the potential of mobile web 2.0 tools to facilitate social constructivist learning across multiple learning contexts, including: both formal and informal, geographically disperse, synchronously and asynchronously. The research focused upon the use of smartphones termed Wireless Mobile Devices (WMDs), coupled with mobile formatted web 2.0 social software. The research used a participatory action research methodology, and based its pedagogical decisions upon the foundation of social constructivist learning theory. This thesis captures the learning journeys of the researcher and participants as they moved from initial skepticism to personal appropriation of the new technologies. Highlighting the ontological shifts required for integrating the unique affordances of these mobile web 2.0 technologies into the participants’ pedagogical practice and courses. Resulting in enabling collaborative learning environments that bridge multiple contexts. The research led to the development of an intentional community of practice model for lecturer professional development and scaffolding student learning. A resultant pedagogical design framework was established. Critical success factors were identified, and an implementation strategy for the integration of mlearning within tertiary education was developed. The research provides an example of action- research informed institutional change. This change involved the development of strategies that embed the purposeful appropriation of student-owned WMDs enabling social constructivist pedagogy. The mlearning projects have driven a reconceptualisation of teaching and learning across several courses within the institution. Additionally the thesis explores and extends emergent critical practice-based mlearning literature. The research adds the insights of a significant longitudinal study to the relatively new body of knowledge around mlearning.
Cosmological constraints on the Generalized Uncertainty Principle from modified Friedmann equations
Creators: name: Giardino, Serena
name: Salzano, Vincenzo
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The Generalized Uncertainty Principle (GUP) has emerged in numerous attempts to a theory of quantum gravity and predicts the existence of a minimum length in Nature. In this work, we consider two cosmological models arising from Friedmann equations modified by the GUP (in its linear and quadratic formulations) and compare them with observational data. Our aim is to derive constraints on the GUP parameter and discuss the viability and physical implications of such models. We find for the parameter in the quadratic formulation the constraint $α^{2}_{Q}<10^{59}$ (tighter than most of those obtained in an astrophysical context) while the linear formulation does not appear compatible with present cosmological data. Our analysis highlights the powerful role of high-precision cosmological probes in the realm of quantum gravity phenomenology.
description: Minor changes, references added
An approximation algorithm for joint caching and recommendations in cache networks
Creators: name: Tsigkari, Dimitra
name: Spyropoulos, Thrasyvoulos
Publisher: name: arXiv
Year: 2020
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: Streaming platforms, like Netflix and YouTube, strive to offer high streaming quality (SQ), in terms of bitrate, delays, etc., to their users. Meanwhile, a significant share of content consumption of these platforms is heavily influenced by recommendations. In this setting, the user's overall experience is a product of both the user's interest in a recommended content, i.e., the recommendation quality (RQ), and the SQ of this content. However, network decisions (like caching) that affect the SQ are usually made without considering the recommender's actions. Likewise, recommendations are chosen independently of the potential delivery quality. In this paper, we define a metric of streaming experience (MoSE) that captures the fundamental tradeoff between the SQ and RQ. We aim to jointly optimize caching and recommendations in a generic network of caches, with the objective of maximizing this metric. This is in line with the recent trend for content providers to simultaneously act as Content Delivery Network owners, implying that the same entity may handle both caching and recommendation decisions. We formulate this joint optimization problem and prove that it can be approximated up to a constant factor. To the best of our knowledge, this is the first polynomial algorithm to achieve a constant approximation ratio for the joint problem. Moreover, our numerical experiments show important performance gains of our algorithm over baseline schemes and existing algorithms in the literature.
Additional file 1: of Competing endogenous RNA expression profiling in pre-eclampsia identifies hsa_circ_0036877 as a potential novel blood biomarker for early pre-eclampsia
Creators: name: Hu, Xiaopeng
name: Ao, Junping
name: Li, Xinyue
name: Zhang, Huijuan
name: Wu, Ji
name: Cheng, Weiwei
Publisher: name: figshare
Year: 2018
Subjects: subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Pharmacology
subject: Immunology
subject: FOS: Clinical medicine
subject: Mathematical Sciences not elsewhere classified
subject: Developmental Biology
subject: Infectious Diseases
subject: FOS: Health sciences

description: The demographic characteristics of  the pregnant women which 12 placentas were from. The demographic characteristics of the pregnant women which blood samples were from. The top 10 differentially expressed circRNAs in placenta of PE using microarray analyses. Oligonucleotide primer sequences for qRT-PCR. Study disign. The variability between controls in microarray vs variability between PE samples was shown in BOX plot. Hsa_circ_0036877 can function as a ceRNA in the PE placenta. The correlation between the expression in placenta and maternal blood from the same individuals in the PE and non-PE grounps.  (PDF 967 kb)
Intra-Processing Methods for Debiasing Neural Networks
Creators: name: Savani, Yash
name: White, Colin
name: Govindarajulu, Naveen Sundar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: As deep learning models become tasked with more and more decisions that impact human lives, such as criminal recidivism, loan repayment, and face recognition for law enforcement, bias is becoming a growing concern. Debiasing algorithms are typically split into three paradigms: pre-processing, in-processing, and post-processing. However, in computer vision or natural language applications, it is common to start with a large generic model and then fine-tune to a specific use-case. Pre- or in-processing methods would require retraining the entire model from scratch, while post-processing methods only have black-box access to the model, so they do not leverage the weights of the trained model. Creating debiasing algorithms specifically for this fine-tuning use-case has largely been neglected. In this work, we initiate the study of a new paradigm in debiasing research, intra-processing, which sits between in-processing and post-processing methods. Intra-processing methods are designed specifically to debias large models which have been trained on a generic dataset and fine-tuned on a more specific task. We show how to repurpose existing in-processing methods for this use-case, and we also propose three baseline algorithms: random perturbation, layerwise optimization, and adversarial fine-tuning. All of our techniques can be used for all popular group fairness measures such as equalized odds or statistical parity difference. We evaluate these methods across three popular datasets from the AIF360 toolkit, as well as on the CelebA faces dataset. Our code is available at https://github.com/abacusai/intraprocessing_debiasing.
Haplotyping with peptide nucleic acids: a novel method for tissue typing
Creators: name: Murphy, Nicholas Mark
Publisher: name: Monash University
Year: 2017
Subjects: Uncategorized

description: In the effort to become the first to establish the “thousand dollar genome,” a fundamental component has been outside the main focus of many geneticists: the appreciation of phase. For any genotype or allele, flanking elements can have varying degrees of influence, which limits the effectiveness of multifactorial trait/disorder mapping. Several types of laboratory means can resolve unambiguous sequences up to several hundred thousand bases in length however the longer the sequence generally means increases in time, labour and expense. This project sought to develop a means of providing a simple, robust and effective procedure to target and isolate specific DNA sequences in order to enable the unambiguous sequence. The target was decided as the human leukocyte antigen system, a cluster of genes with a well-established pattern of allelic linkage. In order to target this region, a new class of molecule, peptide nucleic acids, were bound to nominated alleles selected. The peptide nucleic acids were designed with fluorescent and biotin moieties to enable their detection and for solid phase extraction (i.e. magnetic beads/microplate) once bound to their matching allele. A probe-targetextraction methodology was used as a template for basing the protocol. To facilitate the development of the process to use on genomic DNA, two allelespecific plasmid constructs were generated to test the process under favourable conditions. Increases in the targeted allele were detected by allele specific quantification using real-time polymerase chain reaction and sequencing. The assay was adapted for use with genomic DNA, extracted from whole blood samples with a custom extraction protocol designed to maximise the molecular weight of the DNA. The assay was tested for a range of variables aimed at determining factors that influence the allelic ratio pre and post assay. Optimising the hybridisation conditions, starting amount, probe to target ratio and wash number influenced the degree of allelic separation. Further experimental work is required on yielding more consistent results in order to reliably produce haploid DNA sequences.
Additional file 1: of CTHRC1 induces non-small cell lung cancer (NSCLC) invasion through upregulating MMP-7/MMP-9
Creators: name: He, Weiling
name: Zhang, Hui
name: Wang, Yuefeng
name: Zhou, Yanbin
name: Luo, Yifeng
name: Cui, Yongmei
name: Jiang, Neng
name: Jiang, Wenting
name: Wang, Han
name: Xu, Di
name: Li, Shuhua
name: Wang, Zhuo
name: Chen, Yangshan
name: Sun, Yu
name: Zhang, Yang
name: Tseng, Hsian-Rong
name: Zou, Xuenong
name: Wang, Liantang
name: Ke, Zunfu
Publisher: name: figshare
Year: 2018
Subjects: Biochemistry
Cell Biology
Molecular Biology
Developmental Biology
Cancer

description: Supplementary data. (DOCX 5937Â kb)
Leveraging Subword Embeddings for Multinational Address Parsing
Creators: name: Yassine, Marouane
name: Beauchemin, David
name: Laviolette, François
name: Lamontagne, Luc
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Address parsing consists of identifying the segments that make up an address such as a street name or a postal code. Because of its importance for tasks like record linkage, address parsing has been approached with many techniques. Neural network methods defined a new state-of-the-art for address parsing. While this approach yielded notable results, previous work has only focused on applying neural networks to achieve address parsing of addresses from one source country. We propose an approach in which we employ subword embeddings and a Recurrent Neural Network architecture to build a single model capable of learning to parse addresses from multiple countries at the same time while taking into account the difference in languages and address formatting systems. We achieved accuracies around 99 % on the countries used for training with no pre-processing nor post-processing needed. We explore the possibility of transferring the address parsing knowledge obtained by training on some countries' addresses to others with no further training in a zero-shot transfer learning setting. We achieve good results for 80 % of the countries (33 out of 41), almost 50 % of which (20 out of 41) is near state-of-the-art performance. In addition, we propose an open-source Python implementation of our trained models.
description: Accepted to IEEE CiSt'20
Additional file 1: of Oncolytic activity of a coxsackievirus B3 strain in human endometrial cancer cell lines
Creators: name: Lin, Yanzhen
name: Wang, Wei
name: Wan, Junkai
name: Yang, Ying
name: Fu, Wenkun
name: Pan, Dequan
name: Cai, Linli
name: Cheng, Tong
name: Huang, Xiumin
name: Wang, Yifeng
Publisher: name: figshare
Year: 2018
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Developmental Biology
subject: Cancer
subject: Infectious Diseases
subject: FOS: Health sciences
subject: Virology

description: Table S1. Primer and probe sequences used for qRT-PCR. Table S2. In vitro oncolytic activity of CV-B3/2035A in a panel of human tumor cell lines. Figure S1. Representative H&E-stained histologic images of vital tissues (including brain, heart, liver, spleen, lung and kidney) of CV-B3/2035A-treated and untreated mice (CTL) euthanized on day 20. (PDF 313 kb)
Symbolic powers in weighted oriented graphs
Creators: name: Mandal, Mousumi
name: Pradhan, Dipak Kumar
Publisher: name: arXiv
Year: 2020
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 05C22, 13D02, 13D45, 05C25, 05C38, 05E40

description: Let $D$ be a weighted oriented graph with the underlying graph $G$ when vertices with non-trivial weights are sinks and $I(D), I(G) $ be the edge ideals corresponding to $D$ and $G,$ respectively. We give explicit description of the symbolic powers of $I(D)$ using the concept of strong vertex covers. We show that the ordinary and symbolic powers of $I(D)$ and $I(G)$ behave in a similar way. We provide a description for symbolic powers and Waldschmidt constant of $I(D)$ for certain classes of weighted oriented graphs. When $D$ is a weighted oriented odd cycle we compute $\reg (I(D)^{(s)}/I(D)^s)$ and prove $\reg I(D)^{(s)}\leq\reg I(D)^s$ and show that equality holds when there is only one vertex with non-trivial weight.
title: 03_0484
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Modular categories with transitive Galois actions
Creators: name: Ng, Siu-Hung
name: Wang, Yilong
name: Zhang, Qing
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Algebra (math.QA)
subject: Category Theory (math.CT)
subject: FOS: Mathematics

description: In this paper, we study modular categories whose Galois group actions on their simple objects are transitive. We show that such modular categories admit unique factorization into prime transitive factors. The representations of $SL_2(\mathbb{Z})$ associated with transitive modular categories are proven to be minimal and irreducible. Together with the Verlinde formula, we characterize prime transitive modular categories as the Galois conjugates of the adjoint subcategory of the quantum group modular category $\mathcal{C}(\mathfrak{sl}_2,p-2)$ for some prime $p > 3$. As a consequence, we completely classify transitive modular categories. Transitivity of super-modular categories can be similarly defined. A unique factorization of any transitive super-modular category into s-simple transitive factors is obtained, and the split transitive super-modular categories are completely classified.
description: Minor errors in proposition 5.11 and the associated parts in this version of the paper have been corrected
Convex Relaxation of AC Optimal Power Flow with Flexible Transmission Line Impedances
Creators: name: Song, Yue
name: Hill, David J.
name: Liu, Tao
name: Chen, Tianlun
Publisher: name: arXiv
Year: 2020
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics

description: Flexible transmission line impedances on one hand are a promising control resource for facilitating grid flexibility, but on the other hand add much complexity to the concerned optimization problems. This paper develops a convexification method for the AC optimal power flow with flexible line impedances. First, it is discovered that a flexible-impedance line is equivalent to a constant-impedance line linking a pair of transformers with correlated and continuously adjustable tap ratios. Then, with this circuit equivalent, the original optimization problem is reformulated into a semi-definite program under the existing convex relaxation framework, which improves the solution tractability and optimality in an easy-to-implement manner. The proposed method is verified by numerical tests on the IEEE 118-bus system.
description: 4 pages, 2 figures
Riemann's non-differentiable function and the binormal curvature flow
Creators: name: Banica, Valeria
name: Vega, Luis
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We make a connection between a famous analytical object introduced in the 1860s by Riemann, as well as some variants of it, and a nonlinear geometric PDE, the binormal curvature flow. As a consequence this analytical object has a non-obvious nonlinear geometric interpretation. We recall that the binormal flow is a standard model for the evolution of vortex filaments. We prove the existence of solutions of the binormal flow with smooth trajectories that are as close as desired to curves with a multifractal behavior. Finally, we show that this behavior falls within the multifractal formalism of Frisch and Parisi, which is conjectured to govern turbulent fluids.
Electronic Supplementary Material from Social conformity and propagation of information in collective U-turns of fish schools.
Creators: name: Lecheval, Valentin
name: Jiang, Li
name: Tichit, Pierre
name: Sire, Clément
name: K. Hemelrijk, Charlotte
name: Theraulaz, Guy
Publisher: name: The Royal Society
Year: 2018

description: Material and methods & Supplemental figures
Electronic Supplementary Material from Social conformity and propagation of information in collective U-turns of fish schools
Creators: name: Lecheval, Valentin
name: Jiang, Li
name: Tichit, Pierre
name: Sire, Clément
name: K. Hemelrijk, Charlotte
name: Theraulaz, Guy
Publisher: name: The Royal Society
Year: 2018

description: Material and methods & Supplemental figures
Distance functions with dense singular sets
Creators: name: Santilli, Mario
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We characterize the denseness of the singular set of the distance function from a $\mathcal{C}^1$-hypersurface in terms of an inner ball condition and we address the problem of the existence of viscosity solutions of the Eikonal equation whose singular set (i.e. set of non-differentiability points) is not no-where dense.
description: 7 pages. In v2 we correct a couple of minor typos. Submitted
Hilbert Functions of Artinian Gorenstein algebras with the Strong Lefschetz Property
Creators: name: Altafi, Nasrin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Commutative Algebra (math.AC)
subject: FOS: Mathematics
subject: 13E10, 13D40, 13H10, 05E40

description: We prove that a sequence $h$ of non-negative integers is the Hilbert function of some Artinian Gorenstein algebra with the strong Lefschetz property if and only if it is an SI-sequence. This generalizes the result by T. Harima which characterizes the Hilbert functions of Artinian Gorenstein algebras with the weak Lefschetz property. We also provide classes of Artinian Gorenstein algebras obtained from the ideal of points in $\mathbb{P}^n$ such that some of their higher Hessians have non-vanishing determinants. Consequently, we provide families of such algebras satisfying the SLP.
description: 16 pages; minor revision; to appear in the Proc. of the AMS
A semantic SLAM model for autonomous mobile robots using content based image retrieval techniques
Creators: name: Tan, Choon Ling
Publisher: name: Monash University
Year: 2017
Subjects: Uncategorized

description: Localization and environmental mapping are two fundamental functions for an autonomous mobile robot. This thesis develops a new framework that allows a robot with a vision sensor to simultaneously achieve both of these functions. The novel approach attempts to interpret video images for their meaning, generating a map and localization data from these meanings. The experiments show promising results for this new approach. If robots are to perform robustly with no a priori knowledge of their environment then they must have the ability to perform Simultaneous Localization and Mapping (SLAM), whereby the robot incrementally builds a map of the environment it is navigating while simultaneously keeping track of its location within the built map. SLAM might be considered a solved problem. There is certainly a large body of literature, discussed in this thesis, which provides decent models for building robust solutions. However, most, if not all, of the current state of the art SLAM techniques rely on solutions with a tight loop of detecting and tracking low-level features to update the robots current pose, or location. We argue these methods are brittle and do not offer general purpose solutions to the problem. This thesis takes a cognitive approach to the subject and develops a new SLAM model based on extracting semantic information from the robot’s sensor data. In this thesis, we develop a new SLAM framework which analyses video streams for semantic content. We do this with inspiration from the Content Based Image Retrieval (CBIR) research area. We use the well-established Tamura texture features to decompose the video stream into a grid of lexemes (or recognized categories) which we then use to construct grammatical sentences. These sentences form place descriptions and are used for constructing the environmental map and localization. In contrast to engineered methods, our framework does not return precise location information as we argue it is enough to know roughly where one is located. We have implemented a proof of concept model and tested within both indoor and outdoor environments. The results show that our model can construct useful semantic descriptions from the video stream and use these descriptions to implement SLAM. Although the derived semantic descriptions are fairly coarse (based on the limitations of the Tamura texture features), the technique could be refined by adopting a richer set of the feature vectors, however, we leave this as future work.
Neural networks with late-phase weights
Creators: name: von Oswald, Johannes
name: Kobayashi, Seijin
name: Meulemans, Alexander
name: Henning, Christian
name: Grewe, Benjamin F.
name: Sacramento, João
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: The largely successful method of training neural networks is to learn their weights using some variant of stochastic gradient descent (SGD). Here, we show that the solutions found by SGD can be further improved by ensembling a subset of the weights in late stages of learning. At the end of learning, we obtain back a single model by taking a spatial average in weight space. To avoid incurring increased computational costs, we investigate a family of low-dimensional late-phase weight models which interact multiplicatively with the remaining parameters. Our results show that augmenting standard models with late-phase weights improves generalization in established benchmarks such as CIFAR-10/100, ImageNet and enwik8. These findings are complemented with a theoretical analysis of a noisy quadratic problem which provides a simplified picture of the late phases of neural network learning.
description: 25 pages, 6 figures
The role of mature megakaryocytes in the haematopoietic stem cell niche
Creators: name: Neaves, Rebecca Joy
Publisher: name: Monash University
Year: 2017
Subjects: Uncategorized

description: Haematopoiesis is the tightly regulated process within the bone marrow (BM) responsible for the maintenance of all haematopoietic cells and is sustained by a rare population of haematopoietic stem cells (HSC). HSC have the capacity for quiescence and self-renewal and the ability to differentiate into all cells of myeloid and lymphoid lineages. Interestingly, it has been shown that the regulation and fate of HSC in the BM is governed by the unique surrounding microenvironment, termed the HSC niche. Elements of the BM, such as osteoblasts (OB), the sympathetic nervous system (SNS) and endothelial cells (EC) have been shown to influence haematopoietic stem and progenitor cell (HSPC) function, however, the precise interactions within the HSC niche remains unclear. In this thesis, we have established that mature megakaryocytes (MM), which are large polyploid cells of the myeloid lineage with the primary function of generating platelets, have a functional role within the HSC niche. We have shown that although MM are randomly distributed throughout the BM, a significant majority of HSPC transplanted into non-ablated recipients are found within close spatial location to MM. Additionally, in vitro studies using purified, functionally viable populations of polyploid MM, isolated by a novel multiparameter flow cytometric sort strategy, have demonstrated that co-culture with HSPC significantly increases the growth of endosteal HSC. Furthermore, co-culture of HSC with freshly isolated MM significantly increases the incidence of long-term (LT) repopulating cells, compared to HSC cultured alone. However, HSC co-cultured with MM were outcompeted by HSC cultured alone, suggesting that, in vitro, MM support the expansion of a more mature progenitor cell that is still capable of LT repopulation. Subsequent analysis of culture supernatants using cytokine arrays identified Insulin-like Growth Factor -1 (IGF-1) and Insulin-like Growth Factor Binding Protein -3 (IGFBP-3) as candidate proteins secreted by MM which may be responsible for regulation of HSC growth in vitro. The addition of these two proteins to HSC cultures resulted in a significant increase in cell growth, which was equivalent to co-culture with MM. Furthermore, the use of perturbation models with a higher proportion of MM in the BM microenvironment, there is an increase in homing of transplanted HSC. Conversely, in mice with a BM microenvironment devoid of MM there is a decrease in homing of transplanted HSC and an inability to facilitate normal haematopoietic reconstitution post-BM-ablation. In summary, these findings establish a previously unrecognised role of MM in regulating HSC function within the HSC niche.
Neuromorphic Computing for Content-based Image Retrieval
Creators: name: Liu, Te-Yuan
name: Mahjoubfar, Ata
name: Prusinski, Daniel
name: Stevens, Luis
Publisher: name: arXiv
Year: 2020
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Neuromorphic computing mimics the neural activity of the brain through emulating spiking neural networks. In numerous machine learning tasks, neuromorphic chips are expected to provide superior solutions in terms of cost and power efficiency. Here, we explore the application of Loihi, a neuromorphic computing chip developed by Intel, for the computer vision task of image retrieval. We evaluated the functionalities and the performance metrics that are critical in content-based visual search and recommender systems using deep-learning embeddings. Our results show that the neuromorphic solution is about 2.5 times more energy-efficient compared with an ARM Cortex-A72 CPU and 12.5 times more energy-efficient compared with NVIDIA T4 GPU for inference by a lightweight convolutional neural network without batching while maintaining the same level of matching accuracy. The study validates the potential of neuromorphic computing in low-power image retrieval, as a complementary paradigm to the existing von Neumann architectures.
Adherence to acute hand therapy treatment – application of a multi-dimensional model
Creators: name: O'Brien, Elizabeth (Lisa) Jane
Publisher: name: Monash University
Year: 2017
Subjects: Uncategorized

description: This thesis has its foundations in my clinical work as a Senior Hand Therapist in a fast paced acute hospital setting. The literature shows that patient adherence to hand therapy treatment in acute conditions (defined as less than three months post injury) results in superior recovery and prevention of deformities in tendon, nerve, and bony injury and prevention of contractures post burns. Non-adherence with splinting in acute injury can result in increased health system costs by increasing the need for difficult secondary surgical repair procedures, medical, nursing, and allied health support. In this setting, patients who fail to follow their therapy regime have traditionally been labelled ‘non-compliant’ by the surgery and therapy team. Hand therapy literature and conference presentations confirm this thesis’ contention that most therapists perceive non-compliance as a mostly patient-driven problem, reflecting attitudes of the patient, such as ignorance or forgetfulness. This simplistic view is not supported by evidence, with newer patient health behaviour models encompassing additional influences such as socio-economic, health care system, condition-related, and therapy-related factors. There has also been a shift in conceptualising patient behaviour from compliance to that of adherence, and the difference between these terms is explained in Chapter 1. A review of the literature on adherence behaviour is also presented in this thesis, and the Multi-dimensional Adherence Model (MAM) published by the World Health Organisation in 2003 forms the central reference point for the five publications that comprise Chapters 3 to 7. These publications address five key research questions that arose from my aforementioned clinical work. A variety of methodologies have been employed to answer the clinical questions, including a systematic review, qualitative methodology (phenomenological analysis and grounded theory design), a cohort study, and a randomised controlled trial. All provide support for this thesis’ contention that ability to follow treatment for acute injury is impacted by more than one factor, and interventions to improve adherence need to address all relevant factors. The discussion chapter provides examples of interventions, with a summary of the current evidence for each.
A study of the failure of buried reticulation pipes in reactive soils
Creators: name: Gould, Scott John Francis
Publisher: name: Monash University
Year: 2017
Subjects: Uncategorized

description: The failure of buried reticulation pipes has been reported to peak during winter months in a number of countries, including Canada and the United Kingdom, prompting much research. In Australia, the number of pipe failures has been reported to peak during summer. However, this peak does not occur in a consistent manner, varying in magnitude to such a degree as to be strongly evident in some years and scarcely observable in others. No quantitative explanation of the cause of such variation has, as yet been published. Consequently, little is known about the specific causes of seasonal failures in the Australian context. This thesis investigates the causes of the seasonal variations in the failure of Australian water reticulation pipes. An exploratory statistical analysis of historical data was undertaken and used as the basis to develop the hypothesis that the seasonal variation in pipe failure numbers in Melbourne, Australia occurs as the result of soil shrinkage. A detailed field study was then undertaken on an in-service pipe and its surrounding environment to test this hypothesis. Analysis of the data collected during the field study supported this hypothesis. A model to represent the mechanism by which soil shrinkage results in the development of pipe flexural stress is also presented. This model enables the knowledge gained from the field study to be generalised and applied elsewhere. The model uses a novel constitutive surface to determine soil stiffness and hydric expansion coefficient, and a numerical sub-model to determine the equilibrium state of the pipe-soil system. Validation of the model against data collected during the field study showed good agreement. This thesis has improved the understanding of the causes of the failure of buried water reticulation pipe, specifically focusing on the interrelated factors causing the seasonal variation of buried water reticulation pipe failures. This improved understanding will assist asset managers by enabling them to identify assets at high risk of failure due to environmental and climatic conditions.