cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
CRIMSON: An open-source software framework for cardiovascular integrated modelling and simulation
Creators: name: Arthurs, CJ
name: Khlebnikov, R
name: Melville, A
name: Gomez, A
name: Dillion-Murphy, D
name: Cuomo, F
name: Silva Vierira, M
name: Schollenberger,
name: Lynch,
name: Tossas-Bentancourt, C
name: Iyer, K
name: Hopper, S
name: Livingston, E
name: Youssefi, P
name: Noorani, A
name: Behn Ahmed, S
name: Naua, FJH
name: Van Bakel, TMJ
name: Ahmed, Y
name: Van Bakel, PAJ
name: Mynard, J
name: Di Achille, P
name: Gharahi, H
name: Lau, KD
name: Filonova, V
name: Aguirre, M
name: Nama, N
name: Xiao, N
name: Baek, S
name: Garikipati, K
name: Shani, O
name: Nordsletter, D
name: Figueroa, CA
Publisher: name: My University
Year: 2021
Subjects: Alagille Syndrome
Blood Vessels
Computational Biology
Computer Simulation
Finite Element Analysis
Heart Disease Risk Factors
Hemodynamics
Humans
Imaging, Three-Dimensional
Liver Transplantation
Magnetic Resonance Imaging
Models, Anatomic
Models, Cardiovascular
Patient-Specific Modeling
Postoperative Complications
Software
User-Computer Interface

description: In this work, we describe the CRIMSON (CardiovasculaR Integrated Modelling and SimulatiON) software environment. CRIMSON provides a powerful, customizable and user-friendly system for performing three-dimensional and reduced-order computational haemodynamics studies via a pipeline which involves: 1) segmenting vascular structures from medical images; 2) constructing analytic arterial and venous geometric models; 3) performing finite element mesh generation; 4) designing, and 5) applying boundary conditions; 6) running incompressible Navier-Stokes simulations of blood flow with fluid-structure interaction capabilities; and 7) post-processing and visualizing the results, including velocity, pressure and wall shear stress fields. A key aim of CRIMSON is to create a software environment that makes powerful computational haemodynamics tools accessible to a wide audience, including clinicians and students, both within our research laboratories and throughout the community. The overall philosophy is to leverage best-in-class open source standards for medical image processing, parallel flow computation, geometric solid modelling, data assimilation, and mesh generation. It is actively used by researchers in Europe, North and South America, Asia, and Australia. It has been applied to numerous clinical problems; we illustrate applications of CRIMSON to real-world problems using examples ranging from preoperative surgical planning to medical device design optimization.
Yang-Mills Solutions and Dyons on Cylinders over Coset Spaces with Sasakian Structure
Creators: name: Tormählen, Maike
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We present solutions of the Yang-Mills equation on cylinders $\mathbb R\times G/H$ over coset spaces with Sasakian structure and odd dimension $2m+1$. The gauge potential is assumed to be $SU(m)$-equivariant, parametrized by two real, scalar-valued functions. Yang-Mills theory with torsion in this setup reduces to the Newtonian mechanics of a point particle moving in $\mathbb R^2$ under the influence of an inverted potential. We analyze the critical points of this potential and present an analytic as well as several numerical finite-action solutions. Apart from the Yang-Mills solutions that constitute $SU(m)$-equivariant instanton configurations, we construct periodic sphaleron solutions on $S^1\times G/H$ and dyon solutions on $i\mathbb R\times G/H$.
description: 30 pages, 4 figures
EVALUATING THE CORRELATION BETWEEN SERVICE QUALITY AND CUSTOMER PATRONAGE IN DELTA STATE'S WHITE PETROLEUM PRODUCTS SERVICE STATIONS
Creators: name: Mrs. Chinenye Amara, Nwachukwu
Publisher: name: keith journal
Year: 2025
Subjects: service quality delivery, petroleum products, service stations, customer patronage

description: The study focused on the influence of service quality on customer patronage of white petroleum products service stations in Delta State, Nigeria. The business of petroleum products retailing has become highly competitive and following the removal of fuel subsidies which drastically increased the pump prices of petroleum products, there is more consideration and demand for better service delivery from petroleum products retailers. Petroleum products service stations tend to differ from the usual filling stations that retail petroleum products by their capacity (numbers of dispensing pumps) and services they offer to customers such as lube services, vulcanizing services, minimarket, convenience services, customer care services, minor repairs, etc, these services are meant to compliment the sales of petroleum products. Thus, this study examined the impact of service quality on customer patronage of petroleum products service stations in Delta State, Nigeria. The servqual model dimension of service was adopted for this study as (service responsiveness, service assurance, service reliability, service tangibility, and service empathy) as the independent variables against customer patronage as the dependent variable. Petroleum products service stations were selected from Asaba, Ughelli, Sapele, and Warri areas of the State. Questionnaire were administered on customers of the selected service stations using a sample size of 400. Data gathered were analyzed using regression analysis (SPSS version 25). The result of the study showed that there is significant positive relationship between service quality and customer patronage of petroleum products service stations in the areas under review. It was concluded that service responsiveness, service assurance, service reliability, and service tangibility influence customer patronage of petroleum products service stations in Delta State, Nigeria. Based on the findings, we recommended that existing and potential petroleum products service stations to continually train their sale and service people to improve and enhance consistency in their service quality which has been identified as useful in attracting and retaining customers which is in line with the objective function of the firms. This study investigates Sales promotion techniques and brand recognition of electronic stores in Rivers State.
What happens when the lights are left on? Transcriptomic and phenotypic habituation to light pollution
Creators: name: Alaasam, Valentina
name: Hui, Cassandra
name: Lomas, Jonathan
name: Ferguson, Stephen M.
name: Zhang, Yong
name: Yim, Won Cheol
name: Ouyang, Jenny
Publisher: name: Zenodo
Year: 2023
Subjects: artificial light at night
Taeniopygia guttata
Sleep
transcriptomics
resilience
oxidative stress

description: Artificial light at night (ALAN) is one of the most ubiquitous human-induced environmental stressors. ALAN can induce immediate behavioral and physiological changes in animals, sometimes leading to severe health consequences. Nevertheless, many organisms persist in light-polluted environments and may have mechanisms of habituating to ALAN, reducing responses to repeated exposure over time. The capacity for animals to habituate to ALAN has yet to be tested experimentally. We conducted a 6-month repeated-measures experiment with zebra finches (Taeniopygia guttata) to test whether birds can habituate to repeated ALAN exposure. We measured individual changes in behavior, physiology (oxidative stress and telomere attrition), and gene expression to test for concordance among behavioral, physiological, and transcriptomic responses to ALAN. We present evidence of tolerance to chronic ALAN exposure, persistent behavioral responses lasting 8 weeks post-exposure, and habituation to subsequent re-exposure. We found no changes in telomere attrition and a decrease in oxidative stress associated with ALAN exposure, indicating potential protective effects of long-term dim ALAN. Changes in blood transcriptome within individuals revealed unique responses to both previous ALAN exposure and subsequent re-exposure. These results represent organismal resilience to chronic stressors and shed light on the capacity of individuals to persist in an increasingly light-polluted world.
description: Funding provided by: National Institutes of Health
Crossref Funder Registry ID: http://dx.doi.org/10.13039/100000002
Award Number: NIH R15 ES030548Funding provided by: National Science Foundation
Crossref Funder Registry ID: http://dx.doi.org/10.13039/100000001
Award Number: 1937966
title: Intertext and allusion in Herodotus' Histories: authority, proof, polemic
Creators: name: Haywood, Jan Liam Thomas
Publisher: name: University of Liverpool Repository
Year: 2014

description: This study considers anew the central question of Herodotus’ relationship with literary and textual sources. It examines how Herodotus comes to define his own work in a context where many artists (both narrative and visual) are seeking to accumulate, delineate, and ultimately dictate cultural memory. Rather than applying traditional Quellenforschung, my analysis centres on examining significant intertextual and allusive relationships in his work. In each chapter, I address the nature of Herodotus’ engagement with certain textual rivals/genres, namely early prose writers, inscriptions, poets (expecially Homer, Simonides, Aeschylus, Sophocles), and oracles. From this emerges a highly nuanced engagement with myriad texts in the Histories (principally: as authoritative voices; as persuasive evidence; and as voices for disputation). Such engagement furnishes considerable authority for the writer of the Histories, to the extent that he provides a superior view of the past, compared to the more limited, partisan perspectives offered by his textual rivals. My study reinforces the salient point that Herodotus is no historian in any modern sense of the word; his interaction with other literary traditions does not appear in a way that is expected of an academic monograph. Nevertheless the evidence for his engagement with a wide and diverse group of texts—both contemporary and non-contemporary—clearly militates against the consensual view that Herodotus was working with predominantly unfixed, oral traditions. Indeed, through this interplay with other literary works Herodotus most clearly defines for the reader his own unique intellectual achievement: the invention of historiography.
Gaussian Processes for Data-Efficient Learning in Robotics and Control
Creators: name: Deisenroth, Marc Peter
name: Fox, Dieter
name: Rasmussen, Carl Edward
Publisher: name: arXiv
Year: 2015
Subjects: subject: Machine Learning (stat.ML)
subject: Machine Learning (cs.LG)
subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Autonomous learning has been a promising direction in control and robotics for more than a decade since data-driven learning allows to reduce the amount of engineering knowledge, which is otherwise required. However, autonomous reinforcement learning (RL) approaches typically require many interactions with the system to learn controllers, which is a practical limitation in real systems, such as robots, where many interactions can be impractical and time consuming. To address this problem, current learning approaches typically require task-specific knowledge in form of expert demonstrations, realistic simulators, pre-shaped policies, or specific knowledge about the underlying dynamics. In this article, we follow a different approach and speed up learning by extracting more information from data. In particular, we learn a probabilistic, non-parametric Gaussian process transition model of the system. By explicitly incorporating model uncertainty into long-term planning and controller learning our approach reduces the effects of model errors, a key problem in model-based learning. Compared to state-of-the art RL our model-based policy search method achieves an unprecedented speed of learning. We demonstrate its applicability to autonomous learning in real robot and control tasks.
description: 20 pages, 29 figures; fixed a typo in equation on page 8
Pollutants Emission of Diesel Engine Using Bio-Ethanol and Kerosene Blends.pdf
Creators: name: Ekaab, Noora Saleh
name: Tamadher Mustafa Abbs Alnasser
name: Hamzaa, Noor Hussein
Publisher: name: figshare
Year: 2020
Subjects: subject: Mechanical Engineering
subject: FOS: Mechanical engineering

description: In this work the emitted pollutants resulted from 4-stroke 4- cylinders Fiat diesel engine run by two blending ratios of 10 and 20% of bio-ethanol to kerosene and compared with pure diesel. The pollutants measured were unburned hydrocarbon (UHC), the carbon monoxide (CO), carbon dioxide (CO2) and nitrogen oxides (NOX). Experiments were performed at different speeds (1250, 1400, 1500, and 1650 rpm). The results indicated that increasing the Bio-ethanol fraction in the blend reduced the emission of UHC, CO, CO2, and NOX more than pure diesel, because increased Bio-ethanol fractionincreased the combustion temperature, improved combustion rates, and the mixture became more homogeneous, as well as improved the process of atomization. This study aims to reduce emitted pollutants of a compression ignition engine by blending bio-ethanol to kerosene.
title: On the use of text classification methods for text summarisation
Creators: name: Garcia Constantino, Matias
Publisher: name: University of Liverpool Repository
Year: 2014

description: This thesis describes research work undertaken in the fields of text and questionnaire mining. More specifically, the research work is directed at the use of text classification techniques for the purpose of summarising the free text part of questionnaires. In this thesis text summarisation is conceived of as a form of text classification in that the classes assigned to text documents can be viewed as an indication (summarisation) of the main ideas of the original free text but in a coherent and reduced form. The reason for considering this type of summary is because summarising unstructured free text, such as that found in questionnaires, is not deemed to be effective using conventional text summarisation techniques. Four approaches are described in the context of the classification summarisation of free text from different sources, focused on the free text part of questionnaires. The first approach considers the use of standard classification techniques for text summarisation and was motivated by the desire to establish a benchmark with which the more specialised summarisation classification techniques presented later in this thesis could be compared. The second approach, called Classifier Generation Using Secondary Data (CGUSD), addresses the case when the available data is not considered sufficient for training purposes (or possibly because no data is available at all). The third approach, called Semi-Automated Rule Summarisation Extraction Tool (SARSET), presents a semi-automated classification technique to support document summarisation classification in which there is more involvement by the domain experts in the classifier generation process, the idea was that this might serve to produce more effective summaries. The fourth is a hierarchical summarisation classification approach which assumes that text summarisation can be achieved using a classification approach whereby several class labels can be associated with documents which then constitute the summarisation. For evaluation purposes three types of text were considered: (i) questionnaire free text, (ii) text from medical abstracts and (iii) text from news stories.
Influence of the Leading-edge Radius on Vortex Development at Hybrid-Delta-Wing Configurations
Creators: name:  DOMINIK SEDLACEK
name:   ANKIT KASI
name:   CHRISTIAN BREITSAMTER
Publisher: name: Proceedings of the Aerospace Europe Conference - EUCASS - CEAS - 2023
Year: 2023
Subjects: DELTA WING
VORTEX

description: This study investigates the influence of the leading-edge radius on vortex systems at hybrid-delta-wing configurations through wind tunnel experiments and simulations. Two variants with different leading-edge radii are compared to a sharp-edged configuration. The results show similar vortex development with respect to a strake and main wing vortex at various angles of attack for both configurations. The doubledelta-wing configuration exhibits a more stable strake vortex with increasing leading-edge radius, leading to a downstream shift in vortex breakdown. The interaction between the vortices occurs more downstream, implying a weaker attraction between them. The triple-delta-wing configuration shows a lower influence of leading-edge radius, with similar flow fields among different variants. Overall, the study highlights the sensitivity of the vortex system to changes in leading-edge radius.The triple-delta-wing configuration is associated with enhanced lateral stability characteristics compared to the double-delta-wing configuration.
On the canonical divisor of smooth toroidal compactifications
Creators: name: Di Cerbo, Gabriele
name: Di Cerbo, Luca F.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Algebraic Geometry (math.AG)
subject: Differential Geometry (math.DG)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: In this paper, we show that the canonical divisor of a smooth toroidal compactification of a complex hyperbolic manifold must be nef if the dimension is greater or equal to three. Moreover, if $n\geq 3$ we show that the numerical dimension of the canonical divisor of a smooth $n$-dimensional compactification is always bigger or equal to $n-1$. We also show that up to a finite étale cover all such compactifications have ample canonical class, therefore refining a classical theorem of Mumford and Tai. Finally, we improve in all dimensions $n\geq 3$ the cusp count for finite volume complex hyperbolic manifolds given in [DD15a].
description: Title shortened to match published version
title: Positive psychological factors in late adolescence: The role of resilience and hope in the well-being of 16 to 18 year olds
Creators: name: Charles, Victoria
Publisher: name: University of Liverpool Repository
Year: 2014

description: Background: Adolescence is a time of significant psychological readjustment. A number of young people experience the transition to adulthood as challenging, however many are able to adapt without significant difficulties and thus demonstrate resilience. Aim: The aim of this study was to investigate the role of hope and resilience in relation to well-being in late adolescence in a sample of young people aged between 16 and 18 years. Method: A cross-sectional questionnaire design was utilised with a sample of 50 participants aged between 16 and 18 years of age and who were recruited from a college. Participants completed three measures relating to well-being, resilience, and hope. Findings: The results support the hypotheses that hope and resilience are related to well-being. High levels of hope are associated with high levels of well-being and hope is a significant predictor of well-being in young people aged between 16 and 18 years. Implications: Young people may benefit from accessing services that enhance their levels of hope and resilience and emphasise their existing strengths and resources in relation to negotiating the transition to adulthood.
On Functional Representations of the Conformal Algebra
Creators: name: Rosten, Oliver J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Starting with conformally covariant correlation functions, a sequence of functional representations of the conformal algebra is constructed. A key step is the introduction of representations which involve an auxiliary functional. It is observed that these functionals are not arbitrary but rather must satisfy a pair of consistency equations corresponding to dilatation and special conformal invariance. In a particular representation, the former corresponds to the canonical form of the Exact Renormalization Group equation specialized to a fixed-point whereas the latter is new. This provides a concrete understanding of how conformal invariance is realized as a property of the Wilsonian effective action and the relationship to action-free formulations of conformal field theory. Subsequently, it is argued that the conformal Ward Identities serve to define a particular representation of the energy-momentum tensor. Consistency of this construction implies Polchinski's conditions for improving the energy-momentum tensor of a conformal field theory such that it is traceless. In the Wilsonian approach, the exactly marginal, redundant field which generates lines of physically equivalent fixed-points is identified as the trace of the energy-momentum tensor.
description: v5: Published version (50 pages)
Mapping heterogeneous forest-pasture mosaics in the Brazilian Amazon using a spectral vegetation variability index, band transformations and random forest classification
Creators: name: Mu, Ye
name: Biggs, Trent
name: Stow, Douglas
name: Izaya Numata
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Amazonian tropical rainforest is being converted to other land cover types including crops and pasture. In deforested areas, secondary forest grows after pastures are abandoned, and ‘dirty pasture’ that has trees and shrubs but is actively used for grazing are also regionally important land cover types following forest conversion. This study describes a multistage process land cover classification method to map primary forest, secondary forest, pasture, pasture with trees, built and water in the Brazilian state of Rondônia. A recently developed Spectral Variability Vegetation Index (SVVI) is tested to discriminate land cover types with differing tree cover amounts. Random Forest classifier (RF) is applied to inputs from a) spectral mixture analysis (SMA), and b) tasselled cap (TC) transformation, both with and without SSVI as an additional input feature. SVVI improved the classification accuracy from 73% (TC) to 85% (TC-SVVI), and TC-SVVI yielded a land cover map with higher accuracy than that from SMA-SVVI (82%). Pasture-with-trees, secondary forest and primary forest were all distinguishable with the SVVI. Pasture-with-trees accounted for 67% of all pastures, demonstrating its importance for regional land cover. This land cover classification workflow with the SVVI index improves the accuracy of mapping heterogeneous tropical land cover types.
A Lorentz Gauge Theory of Gravity
Creators: name: Borzou, Ahmad
Publisher: name: arXiv
Year: 2014
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a Lorentz gauge theory of gravity in which the metric is not dynamical. Spherically symmetric weak field solutions are studied. We show that this solution contains the Schwarzschild spacetime at least to the first order of perturbation. Next, we present a special case of the theory. It is shown that the Schwarzschild metric is now an exact solution. Moreover, we show that the de Sitter space is an exact vacuum solution and as a result the theory is able to explain the expansion of the universe with no need for a dark energy. Within this special case, quantization of the theory is also studied. The basic Feynman diagrams are derived and renormalizability of the theory is studied using the power-counting method. We show that under a certain condition the theory is power-counting renormalizable.
description: 13 pages, 5 figures, accepted for publication in CQG
Disconnection, random walks, and random interlacements
Creators: name: Sznitman, Alain-Sol
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60F10, 60K35, 60J27, 82B43

description: We consider random interlacements on Z^d, with d bigger or equal to 3, when their vacant set is in a strongly percolative regime. We derive an asymptotic upper bound on the probability that the random interlacements disconnect a box of large side-length from the boundary of a larger homothetic box. As a corollary, we obtain an asymptotic upper bound on a similar quantity, where the random interlacements are replaced by the simple random walk. It is plausible, but open at the moment, that these asymptotic upper bounds match the asymptotic lower bounds obtained by Xinyi Li and the author in arXiv:1310.2177, for random interlacements, and by Xinyi Li in a recent article, for the simple random walk. In any case, our bounds capture the principal exponential rate of decay of these probabilities, in any dimension d bigger or equal to 3.
description: 38 pages, corresponds to the version published in Probability Theory and Related Fields except for the numbering of the sections
The effects of misregistration between hyperspectral and panchromatic images on linear spectral unmixing
Creators: name: Xiaoyu Cheng
name: Yueming Wang
name: Jianxin Jia
name: Maoxing Wen
name: Shu, Rong
name: Jianyu Wang
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Pharmacology
subject: Biotechnology
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Plant Biology

description: Low probability subpixel target extraction and identification is important for hyperspectral (HS) applications. To better exploit the signatures of targets and extract targets from mixed pixels, we proposed a linear spectral unmixing algorithm combining HS and panchromatic (Pan) images (called SU-Co-Ims). However, misregistration between HS and Pan images is common, which usually has a negative impact on subsequent applications. Our motivation is to attempt to quantify the misregistration error range in which the extracted subpixel target is valid. To determine the maximum acceptable misregistration error (MAME), we focus on analysing the impact of misregistration between images on target extraction, that is, the effects of misregistration between images on linear spectral unmixing. Taking Pan image as reference, HS image and Pan image are intentionally misregistered in the along-track direction. The proposed SU-Co-Ims method is applied to decompose mixed pixels and extract subpixel targets. Spectral angle mapper (SAM) and Euclidean distance (ED) are used to evaluate spectral unmixing error introduced by misregistration between images. Results indicate that spectral unmixing error increases with misregistration error, and the MAME varies from 0.35 to 1.94 pixels for imagers with different spatial resolution. Consequently, accurate image registration remains crucial to unmixing-based subpixel target extraction, but misregistration has a low impact on results when the misregistration error between images is smaller than the MAME.
title: Defying Gravity: What Drives Productivity in Remote Teams?
Creators: name: Fackler, Thomas
name: Hofmann, Michael
name: Laurentsyeva, Nadzeya
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 427

description: How can teams organize for productive online collaboration? The coronavirus pandemic has led to a large and persistent shift toward remote work. Using fine-grained data from the world's largest platform for open-source software development, we find that the pandemic reduced the productivity of previously co-located teams substantially, whereas similar teams with remote work experience remained resilient. While access to remote talent and experience are important for overall team success, our results highlight the crucial role of communication for productive online collaboration. We find suggestive evidence that, with their peers shifting to online work, remote workers become better integrated into their teams' communication. We conclude that while teams' performance may suffer from the shift to remote work, setting up systems for effective online communication can help mitigate productivity loss.
MPEC 2024-R287 : 2024 RU13
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 RU13

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
G-symmetric spectra, semistability and the multiplicative norm
Creators: name: Hausmann, Markus
Publisher: name: arXiv
Year: 2014
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: In this paper we develop the basic homotopy theory of G-symmetric spectra (that is, symmetric spectra with a G-action) for a finite group G, as a model for equivariant stable homotopy with respect to a G-set universe. This model lies in between Mandell's equivariant symmetric spectra and the G-orthogonal spectra of Mandell and May and is Quillen equivalent to the two. We further discuss equivariant semistability, construct model structures on module, algebra and commutative algebra categories and describe the homotopical properties of the multiplicative norm in this context.
description: Final published version
Sensitivity of remote sensing-based vegetation proxies to climate and sea surface temperature variabilities in Australia and parts of Southeast Asia
Creators: name: Sanjiwana Arjasakusuma
name: Bachtiar Wahyu Mutaqin
name: Andung Bayu Sekaranom
name: Muh Aris Marfai
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Plant Biology

description: The development of remote sensing (RS) technology has enabled the dynamics of various vegetation biophysical parameters to be monitored, such as the water content of vegetation, fraction of green vegetation, and fluorescence relating to photosynthesis. This study aims to estimate and compare the influence of climate and sea surface temperature (SST) variabilities on vegetation dynamics in Australia and parts of Southeast Asia by conducting lagged Pearson’s correlation coefficient (r), multilinear regression, and teleconnection analyses using the Empirical Orthogonal Teleconnection (EOT). The monthly vegetation anomalies from January 2013 to September 2018 (69 months) from several RS-based proxies such as, Solar Induced Fluorescence (SIF) from the Global Ozone Monitoring Experiment (GOME)-2B, Moderate Resolution Imaging Spectroradiomater (MODIS) based-Normalized Differenced Vegetation Index (NDVI) and the Enhanced Vegetation Index (EVI), and X-, C- and Ku-band microwave-based Vegetation Optical Depth Climate Archive (VODCA), were linked with precipitation and rainfall anomalies in Global Land Data Assimilation System (GLDAS) data and Optimum Interpolation Sea Surface Temperature (OISST) anomalies from National Oceanic and Atmospheric Administration (NOAA). The results showed the correlation strengths between vegetation dynamics and precipitation and rainfall were −0.23 (X- and Ku-band VOD) to 0.35 (SIF) and −0.41 (NDVI) to 0.39 (SIF), respectively. The climate variabilities can explain 22% to 37% (Radj2 of 19% to 35%) of the variance in vegetation dynamics in the study area. In addition, the two modes generated from EOT analysis formed spatial patterns relating to El Nino Southern Oscillation (ENSO) events that can explain 18% (SIF) to 62% (Ku-band VOD) of the variance in vegetation dynamics. These results highlight the influence of climate variabilities and ENSO on various vegetation biophysical properties.
title: Racism, tolerance and identity: responses to black and asian migration into Britain in the national and local press, 1948-72
Creators: name: Young, Matthew
Publisher: name: University of Liverpool Repository
Year: 2013

description: This thesis explores the response of national and local newspapers to issues of race and black and Asian immigration in Britain between 1948 and 1972. Scholars have highlighted the importance of concepts of race, identity and belonging in shaping responses to immigration, but have not yet explained the complex ways in which these ideas are disseminated and interpreted in popular culture. The thesis analyses the complex role newspapers had in mediating debates surrounding black and Asian immigration for public consumption. By engaging with concepts of race and tolerance, newspapers communicated anxieties about the shape British culture and society would take in the postwar years. Their popularity granted them opportunities to lead attitudes towards black and Asian people and multiculturalism. The influences of social, political and cultural developments on both the national and local level meant newspapers often adopted limited definitions tolerance which failed to combat racism. In other cases, newspapers actively encouraged racist definitions of belonging which privileged their largely white audiences. In order to understand newspapers’ engagement with concepts of race and identity, this thesis analyses the various influences that informed their coverage. While the opinions and ambitions of prominent journalists had a significant impact on newspaper policy, the thesis highlights the language and genres newspapers used to appeal to large audiences. It argues that this had a significant influence on how responses to immigration were communicated in the public sphere.
title: Silicon vertex detector and its applications in the ALPHA experiment
Creators: name: McKenna, Joseph
Publisher: name: University of Liverpool Repository
Year: 2015

description: ALPHA is one of the experiments at CERN's Antiproton Decelerator dedicated for antihydrogen studies. A unique Silicon Vertex Detector (SVD) has been designed and built to surround the ALPHA neutral atom trap, its principle purpose to monitor the experiment. The SVD is main diagnostic tool in the ALPHA-experiment, it is used to detect antiproton annihilation events by means of emitted charged pions originating from the process. The SVD provides precise spatial and timing information of antiproton annihilation events, and most importantly, the SVD is capable of directly identifying and analysing single annihilation events forming the basis of ALPHA’s analysis. This thesis will describe the upgrade of the SVD, the detector build and quality assurance procedure in detail. Annihilation vertex reconstruction methods along with cosmic ray background suppression techniques are explored and developed.
title: Nonnegative matrix analysis for data clustering and compression
Creators: name: Gong, Liyun
Publisher: name: University of Liverpool Repository
Year: 2015

description: Nonnegative matrix factorization (NMF) has becoming an increasingly popular data processing tool these years, widely used by various communities including computer vision, text mining and bioinformatics. It is able to approximate each data sample in a data collection by a linear combination of a set of nonnegative basis vectors weighted by nonnegative weights. This often enables meaningful interpretation of the data, motivates useful insights and facilitates tasks such as data compression, clustering and classification. These subsequently lead to various active roles of NMF in data analysis, e.g., dimensionality reduction tool [11, 75], clustering tool[94, 82, 13, 39], feature engine [40], source separation tool [38], etc. Different methods based on NMF are proposed in this thesis: The modification of k- means clustering is chosen as one of the initialisation methods for NMF. Experimental results demonstrate the excellence of this method with improved compression performance. Independent principal component analysis (IPCA) which combines the advantage of both principal component analysis (PCA) and independent component analysis (ICA) has been chosen as the significant initialisation method for NMF with improved clustering accuracy. We have proposed the new evolutionary optimization strategy for NMF driven by three proposed update schemes in the solution space, saying NMF rule (or original movement), firefly rule (or beta movement) and survival of the fittest rule (or best movement). This proposed update strategy facilitates both the clustering and compression problems by using the different system objective functions that make use of the clustering and compression quality measurements. A hybrid initialisation approach is used by including the state-of-the-art NMF initialization methods as seed knowledge to increase the rate of convergence. There is no limitation for the number and the type of the initialization methods used for the proposed optimisation approach. Numerous computer experiments using the benchmark datasets verify the theoretical results, make comparisons among the techniques in measures of clustering/compression accuracy. Experimental results demonstrate the excellence of these methods with im- proved clustering/compression performance. In the application of EEG dataset, we employed several standard algorithms to provide clustering on preprocessed EEG data. We also explored ensemble clustering to obtain some tight clusters. We can make some statements based on the results we have got: firstly, normalization is necessary for this EEG brain dataset to obtain reasonable clustering; secondly, k-means, k-medoids and HC-Ward provide relatively better clustering results; thirdly, ensemble clustering enables us to tune the tightness of the clusters so that the research can be focused.
Towards global mapping of salt pans and salt playas using Landsat imagery: a case study of western United States
Creators: name: Safaee, Samira
name: Wang, Jida
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Neuroscience
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 20199 Astronomical and Space Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Inorganic Chemistry
subject: Science Policy

description: Monitoring salt pans is important for agricultural management in arid/semi-arid regions because salt pans can negatively affect human life, wildlife, ecology, and cause accelerated desertification, cropland loss, and economic downturn. Spectral salt pan indices based on remotely-sensed data from previous studies vary by location and may not be readily applicable to another location due to the spatial heterogeneity of salt components across the continental surface. Using Landsat-8 imagery and climate datasets, this study aims to develop a mapping scheme which effectively delineates the maximum salt pan/playa extents under various spectral conditions for different geographic locations. Calibrated by a spectral training pool sampled from eight major salt pan/playa sites in the world, this mapping scheme first implements a conservative spectral index to highlight potential salt-covered regions, from which salt pans/playas are further extracted by a support vector machine (SVM). Quality assurance/quality control (QA/QC) with assistance of auxiliary datasets and high-resolution images was performed to reduce commission errors and refine the results. The mapping scheme was applied to the endorheic regions of the western United States with a total area of approximately 700,000 km2, of which 1.6% was mapped as salt pans. Quality assessments show reasonable reliability of the mapping result for most regions, with the producer’s accuracy, user’s accuracy, and kappa coefficient exceeding 90%. The mapped spatial details reveal that salt pans are distributed fairly evenly across the arid western United States, with areas positively correlated to the sizes of the endorheic basins. Given these results, we foresee potential applicability of the developed scheme to map salt pans/playas across Earth’s continental surface. Our spectral training pool and produced salt pan/playa extents are available through https://doi.pangaea.de/10.1594/PANGAEA.913152.
Vivace: a collaborative live coding language and platform
Creators: name: Vieira, Vilson
name: Lunhani, Guilherme
name: Junior, Geraldo Magela de Castro Rocha
name: Luporini, Caleb Mascarenhas
name: Penalva, Daniel
name: Fabbri, Ricardo
name: Fabbri, Renato
Publisher: name: arXiv
Year: 2015
Subjects: subject: Computers and Society (cs.CY)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Live coding is a performance and creative technique based on improvised and interactive coding. Many recent endeavors have focused in live coding both because of aesthetics and as a way to alleviate performance drawbacks when the musical instrument is a computer. This paper describes the principles and the design of Vivace, a live coding language and environment built with Web technologies to be executed on web browsers. The approach is compelling by 1) allowing many performers to code simultaneously, 2) the synthesis of audio and video, 3) a very simple syntax, 4) being a multiplatform software. We also strive to contextualize Vivace by means of historical and usage summaries including a live coding sub-genre.
title: Search for a standard model Higgs Boson in the ZH -> vvbb channel with the ATLAS Detector
Creators: name: Jackson, Matthew
Publisher: name: University of Liverpool Repository
Year: 2016

description: Since its discovery a large effort has been made to improve analyses and make precision measurments of the properties of the Higgs Boson. At a mass of 125 GeV Higgs to bb is the dominant decay mode. However, large QCD backgrounds mean that the gluon-gluon fusion production mode is not directly accessible at the LHC. Instead an analysis of Higgs to bb can considered where the Higgs is produced in association with a Vector Boson (W/Z). This document outlines such an analysis perfomed on the ATLAS Run I 8 TeV data with focus on one particular channel where the Higgs is produces in association with a Z Boson which subsequently decays to a pair of neutrinos.
The prequantum line bundle on the moduli space of flat $SU(N)$ connections on a Riemann surface and the homotopy of the large $N$ limit
Creators: name: Jeffrey, Lisa C.
name: Ramras, Daniel A.
name: Weitsman, Jonathan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Algebraic Topology (math.AT)
subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 53D30, 58D27, 57R20

description: We show that the prequantum line bundle on the moduli space of flat $SU(2)$ connections on a closed Riemann surface of positive genus has degree 1. It then follows from work of Lawton and the second author that the classifying map for this line bundle induces a homotopy equivalence between the stable moduli space of flat $SU(N)$ connections, in the limit as $N$ tends to infinity, and $\mathbb{C}P^\infty$. Applications to the stable moduli space of flat unitary connections are also discussed.
description: 7 pages. Version 3 contains various minor revisions
Performance measures for the two-node queue with finite buffers
Creators: name: Chen, Yanting
name: Bai, Xinwei
name: Boucherie, Richard J.
name: Goseling, Jasper
Publisher: name: arXiv
Year: 2015
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We consider a two-node queue modeled as a two-dimensional random walk. In particular, we consider the case that one or both queues have finite buffers. We develop an approximation scheme based on the Markov reward approach to error bounds in order to bound performance measures of such random walks in terms of a perturbed random walk in which the transitions along the boundaries are different from those in the original model and the invariant measure of the perturbed random walk is of product-form. We then apply this approximation scheme to a tandem queue and some variants of this model, for the case that both buffers are finite. We also apply our approximation scheme to a coupled-queue in which only one of the buffers has finite capacity.
The central limit theorem for supercritical oriented percolation in two dimensions
Creators: name: Tzioufas, Achillefs
Publisher: name: arXiv
Year: 2014
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We consider the cardinality of supercritical oriented bond percolation in two dimensions. We show that, whenever the origin is conditioned to percolate, the process appropriately normalized converges asymptotically in distribution to the standard normal law. This resolves a longstanding open problem pointed out to in several instances in the literature. The result applies also to the continuous-time analog of the process, viz. the basic one-dimensional contact process. We also derive general random-indices central limit theorems for associated random variables as byproducts of our proof.
description: 22pp