cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
title: Flows between Aharony and Giveon-Kutasov Dualities in 3d field theories derived from Type IIB String theories
Creators: name: Khan, Siraj
Publisher: name: University of Liverpool Repository
Year: 2016

description: Bosonic string theory and superstring theory are briefly overviewed. Three dimensional field theories are similarly discussed, with a focus on effective $N=2$ supersymmetric theories. It is shown how to induced contributions to the Chern-Simons level of the low energy theory, by integrating out massive matter. Such effective field theories are then shown to arise from type IIB brane configurations based on the Hanany-Witten brane configuration. Strong-weak dualities are overviewed, leading to a discussion of the three dimensional strong-weak dualities: Aharony duality for theories with zero Chern-Simons level, and Giveon-Kutasov duality for theories with non-zero Chern-Simons level. In the results section, brane configurations corresponding to three-dimensional $N=2$ $U(N_{c})$ field theories with various numbers of flavour of massive matter are investigated. The resulting low energy field theories are explained, and the flows between Aharony and Giveon-Kutasov dualities are catalogued. Three dimensional $N=2$ effective field theories obtained through the inclusion of massive adjoint matter are also examined, with the flows between Aharony and Giveon-Kutasov dualities, again, catalogued. Finally, the significance of the results and the possibilities for future research, are discussed.
Inhalt des 67/68. Jahrgangs
Creators: name: Redaktion, Die
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2019

description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 67/68 (2004/2005): Trierer Zeitschrift : Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
title: Prediction, detection, and observation of rotorcraft pilot coupling
Creators: name: Jones, Michael
Publisher: name: University of Liverpool Repository
Year: 2015

description: Unmasking Aircraft and Rotorcraft Pilot Couplings (A/RPC) prior to vehicle entry into service has been a long standing challenge in the Aerospace Industry. A/RPCs, often only exposed through unpredictable or very specifc circumstances have arisen throughout the history of manned powered ight, and have required short-term 'fixes' to ensure system safety. One of the reasons for this occurrence is th lack of detailed practice regarding the prediction and detection of RPCs prior to full-scale testing. Often in simulation, A/RPCs are only investigated once problems have been experienced during other aircraft qualifcation activities. This is a particular issue for the rotorcraft community, where system sophistication is 'catching-up' with their fixed-wing counterparts. This research helps to extend the state-of-art knowledge surrounding the exposure of RPCs prior to any catastrophic occurrences, through the introduction of novel tools for use both in the rotorcraft design process and beyond. Using key definitions and findings from previous research efforts, objective and subjective measures have been developed for use in both real-time piloted flight and for pre- or post-flight analysis. These tools have been designed to compliment one another, in a process that should reduce the susceptibility to RPC in future rotorcraft. Novel tools developed have been tested through real-time piloted simulation, with results allowing RPC susceptibility boundaries and regions to be identified. Application of all tools developed, both subjective and objective, have been validated through comparison with existing methods. This work provides novel methods to quantify both the propensity of pilot-vehicle systems to RPCs, and the severity of these interactions. Methods have been designed with simplicity of use in mind, whereby they can be applied to vehicles of different configuration, are applicable to a wide range of RPCs, and are easily understandable for prospective users. It is believed that research contained within can contribute to the realisation of European Commission 2020 objectives, by helping to reduce the average accident rate of global aircraft operators.
A ferroelectric memristor
Creators: name: Chanthbouala, André
name: Garcia, Vincent
name: Cherifi, Ryan O.
name: Bouzehouane, Karim
name: Fusil, Stéphane
name: Moya, Xavier
name: Xavier, Stéphane
name: Yamada, Hiroyuki
name: Deranlot, Cyrile
name: Mathur, Neil D.
name: Bibes, Manuel
name: Barthélémy, Agnès
name: Grollier, Julie
Publisher: name: arXiv
Year: 2012
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Memristors are continuously tunable resistors that emulate synapses. Conceptualized in the 1970s, they traditionally operate by voltage-induced displacements of matter, but the mechanism remains controversial. Purely electronic memristors have recently emerged based on well-established physical phenomena with albeit modest resistance changes. Here we demonstrate that voltage-controlled domain configurations in ferroelectric tunnel barriers yield memristive behaviour with resistance variations exceeding two orders of magnitude and a 10 ns operation speed. Using models of ferroelectric-domain nucleation and growth we explain the quasi-continuous resistance variations and derive a simple analytical expression for the memristive effect. Our results suggest new opportunities for ferroelectrics as the hardware basis of future neuromorphic computational architectures.
title: Functional genomics of Crassulacean acid metabolism in the monocot biomass feedstock crop Agave sisalana
Creators: name: Bupphada, Phaitun
Publisher: name: University of Liverpool Repository
Year: 2016

description: Certain Crassulacean acid metabolism (CAM) crops have been recognised as having great potential for the production of renewable biomass for bioenergy production from seasonally dry lands. The work described in this thesis sought to investigate the functional genomics of CAM development and light/ dark regulation in the obligate CAM species Agave sisalana. Semi-quantitative RT-PCR analysis was employed to study the regulation of CAM genes in leaf tissues. The transcript levels of the CAM genes phosphoenolpyruvate carboxylase (AsPPC) and pyruvate orthophosphate dikinase (AsPPDK) were highest in the mature tip, lower in the young, expanding base, and very low to undetectable in the most basal white tissue of the youngest fully expanded leaf from ~3-month-old plants. The PEPC kinase gene (AsPPCK) did not show a clear pattern of differential regulation of its transcript level between the leaf tip and base. CO2 exchange measurements, immuno-blotting of known CAM proteins and malate measurements further confirmed CAM induction in the leaf tip. Furthermore, this is the first report of a circadian rhythm of CO2 fixation in a monocot CAM species. The phosphorylated form of PEPC was only detected in the leaf tip in the dark. Sucrose was highest in the leaf tip, and showed strong light/ dark regulation and clear evidence for circadian clock control. A putative sucrose metabolism-related gene, cell wall invertase (As_cwINV), exhibited strong light/ dark regulation and a robust circadian rhythm in the leaf tip. De novo transcriptome assembly using Illumina RNA-sequencing data totalling ~90 Gbp was generated from light and dark samples of the white basal, pale green basal, and dark green tip sections of the youngest fully expanded leaf sampled in the light (2 h before dusk) and dark (2 h before dawn). Differential expression analysis identified novel CAM-induced transcription factor genes AsNAC (c566713_g1), AsWRKY (c571790_g2), and AsPLATZ (c541787_g1), which exhibited a robust pattern of both light/ dark regulation and circadian clock control, which was established using Q-RT-PCR analysis. Overall, this study provides a high quality whole transcriptome assembly and quantitative analysis resource underpinning future functional genomics studies of CAM in A. sisalana. The CAM-induced and circadian clock controlled transcription factors identified in this study could also be investigated further through generating stable transgenic RNA interference lines or other approaches to determine their functions. This study has also proposed a novel CAM pathway showing leaf development and light/ dark regulation of CAM genes, including the fructan metabolism pathway, thereby providing a better understanding of how fructan might be synthesised and accumulated and turned over to supply part of the PEP required for nocturnal CO2 fixation, in addition to the utilisation of sucrose by CAM in the A. sisalana leaf.
The Fermi GBM Gamma-Ray Burst Catalog: The First Two Years
Creators: name: Paciesas, William S.
name: Meegan, Charles A.
name: von Kienlin, Andreas
name: Bhat, P. N.
name: Bissaldi, Elisabetta
name: Briggs, Michael S.
name: Burgess, J. Michael
name: Chaplin, Vandiver
name: Connaughton, Valerie
name: Diehl, Roland
name: Fishman, Gerald J.
name: Fitzpatrick, Gerard
name: Foley, Suzanne
name: Gibby, Melissa
name: Giles, Misty
name: Goldstein, Adam
name: Greiner, Jochen
name: Gruber, David
name: Guiriec, Sylvain
name: van der Horst, Alexander J.
name: Kippen, R. Marc
name: Kouveliotou, Chryssa
name: Lichti, Giselher
name: Lin, Lin
name: McBreen, Sheila
name: Preece, Robert D.
name: Rau, Arne
name: Tierney, Dave
name: Wilson-Hodge, Colleen
Publisher: name: arXiv
Year: 2012
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The Fermi Gamma-ray Burst Monitor (GBM) is designed to enhance the scientific return from Fermi in studying gamma-ray bursts (GRBs). In its first two years of operation GBM triggered on 491 GRBs. We summarize the criteria used for triggering and quantify the general characteristics of the triggered GRBs, including their locations, durations, peak flux, and fluence. This catalog is an official product of the Fermi GBM science team, and the data files containing the complete results are available from the High-Energy Astrophysics Science Archive Research Center (HEASARC).
description: 92 pages, 11 figures, 5 tables; to be published in ApJS
"The 'Devil' entering our lives": Andean peasant women in Otuzco, Peru
Creators: name: Peredo, Ana Maria
Publisher: name: University of Calgary
Year: 1995
Subjects: subject: HC 288 O88 P47 1995
subject: Otuzco (Peru) - Rural conditions
subject: Peru - Economic conditions - 1968-
subject: Peasantry - Peru - Otuzco
subject: Women in agriculture - Peru - Otuzco

description: Bibliography: p. 141-157.
description: Significant changes are occurring in the lives of the peasants in less developed countries. The spread of salaried work and the monetary markets have given rise to a great deal of discussion about the future of peasantry. This study, based on a small community in the northern Peruvian Andes, and presented within the national and regional context, documents how, where and under what conditions this process is occurring. The Strategy of the Otuzco families consists basically of out-migration of males, while the women and children remain in the country side. The analysis in this document focuses on three main elements: labour relationships, patterns of agricultural labour regarding crops and techniques, and the introduction of new productive activities. With the intrusion of the cash economy, family needs are not being met. On the contrary, the market has increased exploitation and poverty, creating new needs and pressures. A major effect of cash has been the disintegration of the family and the impoverishment of their resources. According to the women in this study, cash has been "like the 'devil' entering our lives".
title: Shining Light on Indium Oxide Gas Sensors at Work: A Combined Operando Raman/UV-Vis/FT-IR Spectroscopic Study
Creators: name: Berka, Sebastian
name: Fleischer, Viktoriya
name: Hess, Christian
Publisher: name: MDPI
Year: 2023

description: Understanding the mode of operation of metal-oxide gas sensors (e.g., SnO₂, In₂O₃) is of great scientific and economic interest. Such a knowledge based approach requires the development and application of spectroscopic tools to monitor the relevant surface and bulk processes under working conditions (operando approach) [1,2] In previous studies on In₂O₃ sensors, we applied combined operando Raman/gas-phase FT-IR spectroscopy to ethanol gas sensing [2,3] In this contribution, we will present recent results on ethanol and CO detection using undoped and Ag doped In₂O₃ gas sensors, demonstrating the advantages of (i) operando Surface Enhanced Raman Spectroscopy (SERS) to monitor the metal oxidation state, and (ii) extending the operando Raman/FT-IR setup by UV-Vis spectroscopy to reveal the degree of In₂O₃ reduction.
title: Neutral particle detection methods using Noble gases in LAGUNA-LBNO and MODES-SNM
Creators: name: Stainer, Thomas
Publisher: name: University of Liverpool Repository
Year: 2016

description: Neutral particles, particularly neutrons, gammas and neutrinos are difficult to detect and measure due to their lack of electric charge. Noble fluids are a powerful medium when detecting such particles due to their ability to collect charge and scintillation light. The LAGUNA-LBNO and MODES-SNM projects are two independent projects that focus on using this concept to detect neutral particles of interest. The two projects are consecutively discussed in this thesis. A study on a potential near detector design to be used within the proposed LAGUNA-LBNO experiment is presented. We introduce a novel design for the near detector based on a pressurised gas Argon TPC at 20 bar surrounded by layers of plastic scintillator, encompassed in a pressurised gas chamber. Monte Carlo studies form the basis of the study with focus on detector interaction rates and assessment of the basic detector properties and parameterisation. Based on a 2 × 2 × 2 × m3 TPC we estimate 0.1785 ± 0.0003 (stat) neutrinos p.p.p interactions for a 400 GeV neutrino beam in positive focusing and 0.0628 ± 0.0002 (stat) muon neutrinos p.p.p interactions for energies 0-10 GeV in a 1.8 × 1.8 × 1.8 × m3 fiducial volume. Conversely we can expect high muon backgrounds in the TPC at 44.5 ± 0.5 μ (stat) p.p.p, arising from neutrino interactions with external detector components (non TPC) and surrounding rock interactions. With the inclusion of the muons arising from the beam directly at 70 p.p.p (estimated) we can expect ∼1-2 μ tracks in the TPC / 700 cm2 / spill. Within the MODES-SNM section of the thesis a prototype system is designed, tested and analysed using He4, instead of the commonly favourable He3, for fast neutron detection. A neutron-gamma discrimination analysis is performed based on a pulse shape discrimination technique from the collected scintillation light of PuBe and Co60 sources in laboratory conditions. For high levels of gamma contamination (up to 76%) detection efficiencies exceeding 96% can be achieved with the prototype system while maintaining reasonable false alarm rates (
Markus Asal, Ein spätrömischer Getreidespeicher am Rhein
Creators: name: Grunwald, Lutz
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2019

description: Rezension zu: Markus Asal, Ein spätrömischer Getreidespeicher am Rhein. Die Grabung Rheinfelden-Augarten West 2001. Mit Beiträgen von Alfred M. Hirt, Heide Hüster Plogmann, Markus Peter, Philippe Rentzel, Gerwulf Schneider und Petra Zibulski. Veröffentlichungen der Gesellschaft Pro Vindonissa 19 (Gesellschaft Pro Vindonissa, Brugg 2005). 191 S., 97 Abb., 3 Befundtaf., 17 Taf., 2 Faltbl. ISBN 978-3-9523105-0-2. Gebunden
description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 69/70 (2006/2007): Trierer Zeitschrift : Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Reductions of lattice mKdV to $q$-$\mathrm{P}_{VI}$
Creators: name: Ormerod, Christopher M.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: This Letter presents a reduction of the lattice modified Korteweg-de-Vries equation that gives rise to a $q$-analogue of the sixth Painlevé equation. This new approach allows us to give the first ultradiscrete Lax representation of an ultradiscrete analogue of the sixth Painlevé equation.
description: 4 pages
title: Synthesis and Catalytic Potential of Rare Earth Heterobimetallic Complexes
Creators: name: Thomas, Christopher
Publisher: name: University of Liverpool Repository
Year: 2016

description: A novel route to chiral and achiral 2-aryloxazolyl compounds, building upon work already extant in the group has allowed for the development of an alternative route to oxazoline ligands. This route allows for the previous ease of scalability and high yields whilst vastly reducing reaction times and improving the purification procedure. This new method is significantly gentler using ambient conditions throughout much of the procedure and is therefore synthetically much simpler. The total reaction time has also been reduced allowing for the production of cleaner materials, faster and in analogous yields. These ligands possess many characteristics that would make them ideal for catalysis especially with high oxidation state metals. We have demonstrated the effective anhydrous self-assembly of several heterobimetallic complexes using these ligands with Ln3+ and alkali metals (M) such as lithium or sodium of the general formula Mx[Ln(L)x+3]. These have been fully characterised and their catalytic potential demonstrated with the nitroaldol reaction. It is hoped that through this initial study into the catalytic potential of these complexes we can gain insight into the catalytic pathway which will lead to further optimisation of these catalysts.
Das Rheinische Landesmuseum Trier 2003-2007/08 : Bericht der Direktion
Creators: name: Goethert-Polaschek, Karin
name: Neyses-Eiden, Mechthild
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2019

description: [nicht vorhanden]
description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 71/72 (2008/2009): Trierer Zeitschrift : Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
title: Manipulation of Olefins Using a Rhodium Catalyst in a Highly Selective Manner
Creators: name: Yip, Stephanie
Publisher: name: University of Liverpool Repository
Year: 2016

description: This thesis highlights the work done from the second year onwards of the PhD under the supervision of Dr. Christophe Aïssa, concentrating on the isomerisation of olefins triggered by rhodium-catalysed C‒H bond activation. The work involves delicate control of changing the reaction pathway driven by the manipulation of substrates in a highly selective fashion all using the same rhodium catalyst. The thesis includes one main chapter on relevant literature on 5-membered rhodacycles, followed by three chapters of results and discussion. The first two results and discussion chapter will highlight the majority of the work done on the rhodium-catalysed intramolecular isomerisation and hydroacylation of terminal alkenes which has recently been published. The third results chapter focuses on the asymmetric hydroacylation of terminal alkenes via parallel kinetic resolution which was also published as part of the same publication focused in the previous chapters. The experimental supporting information will conclude the fifth and final chapter of the thesis.
Spätantike Glasfabrikation in Trier : Funde aus dem Töpfereiviertel und an der Hohenzollernstraße
Creators: name: Goethert-Polaschek, Karin
Publisher: name: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
Year: 2019

description: [nicht vorhanden]
description: Trierer Zeitschrift - Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete, Bd. 73/74 (2010/2011): Trierer Zeitschrift : Archäologie und Kunst des Trierer Landes und seiner Nachbargebiete
title: Asymptotic analysis of dependent risks and extremes in insurance and finance
Creators: name: Liu, Jiajun
Publisher: name: University of Liverpool Repository
Year: 2016

description: In this thesis, we are interested in the asymptotic analysis of extremes and risks. The heavy-tailed distribution function is used to model the extreme risks, which is widely applied in insurance and is gradually penetrating in finance as well. We also use various tools such as copula, to model dependence structures, and extreme value theorem, to model rare events. We focus on modelling and analysing of extreme risks as well as demonstrate how the derived results that can be used in practice. We start from a discrete-time risk model. More concretely, consider a discrete-time annuity-immediate risk model in which the insurer is allowed to invest its wealth into a risk-free or a risky portfolio under a certain regulation. Then the insurer is said to be exposed to a stochastic economic environment that contains two kinds of risk, the insurance risk and financial risk. The former is traditional liability risk caused by insurance loss while the later is the asset risk resulting from investment. Within each period, the insurance risk is denoted by a real-valued random variable $X$, and the financial risk $Y$ as a positive random variable fulfils some constraints. We are interested in the ruin probability and the tail behaviour of maximum of the stochastic present values of aggregate net loss with Sarmanov or Farlie-Gumbel-Morgenstern (FGM) dependent insurance and financial risks. We derive asymptotic formulas for the finite-ruin probability with lighted-tailed or moderately heavy-tailed insurance risk for both risk-free investment and risky investment. As an extension, we improve the result for extreme risks arising from a rare event, combining simulation with asymptotics, to compute the ruin probability more efficiently. Next, we consider a similar risk model but a special case that insurance and financial risks following the least risky FGM dependence structure with heavy-tailed distribution. We follow the study of Chen (2011) that the finite-time ruin probability in a discrete-time risk model in which insurance and financial risks form a sequence of independent and identically distributed random pairs following a common bivariate FGM distribution function with parameter $-1\leq \theta \leq 1$ governing the strength of dependence. For the subexponential case, when $-1
An extensive photometric study of the recently discovered intermediate polar V515 And (XSS J00564+4548)
Creators: name: Kozhevnikov, V. P.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report results of photometry of the intermediate polar V515 And. The observations were obtained over 33 nights in 2008 and 2009. The total duration of the observations was 233 h. We clearly detected two oscillations with periods of 465.48493\pm0.00007$ and 488.61822\pm0.00009 s, which may be the white dwarf spin period and the orbital sideband. The semi-amplitudes of the oscillations are 25 and 20 mmag, accordingly. The oscillation with a period of 465.48493 s has a stable smooth asymmetric pulse profile whereas the pulse profile of the oscillation with a period of 488.61822 s reveals significant changes from a quasi-sinusoidal shape to a shape somewhat resembling a light-curve of an eclipsing binary. Two detected oscillations imply an orbital period of 2.73 h. V515 And is one of the most rapidly spinning intermediate polars with orbital periods less than 3 h and may be not in spin equilibrium. This can be proved by future observations. For this purpose we obtained oscillation ephemerises with a formal shelf life of about 100 yr. (a 1 sigma confidence level).
description: 10 pages, 8 figures, will be published in MNRAS
An exploratory evaluation of solution-focused Ericksonian groups for adults sexually abused in childhood
Creators: name: Perrault, Ellen L. J.
Publisher: name: Social Work
Year: 1995
Subjects: subject: RC 569.5 A28 P47 1995
subject: Adult child sexual abuse victims
subject: Group psychotherapy
subject: Child sexual abuse - Psychological aspects

description: Bibliography: p. 110-132.
description: Survivors of childhood sexual abuse often experience common long-term effects of the abuse such as depression, low self-esteem and anxiety. Currently, therapists off er a range of treatment models and interventions to address survivor issues. The small body of research evaluating these treatment approaches has provided initial support for their efficacy. The current study evaluated Solution­focused Ericksonian group therapy, a new approach for treating sexual abuse survivors. The results indicate that significant improvement occurred over the course of the group in client depression, self-esteem, stress, and problem behaviors associated with past sexual abuse. The clients also reported satisfaction with the program. While these improvements may be the result of the group treatment, design limitations prevent a clear interpretation of this. Future research should evaluate the Solution-focused Ericksonian model, with the addition of comparison or control groups to determine if such improvements are the result of treatment.
Amber taphonomy and the Grassy Lake, Alberta, amber fauna
Creators: name: Pike, Edward M.
Publisher: name: University of Calgary
Year: 1995
Subjects: subject: QE 721.2 F6 P55 1995
subject: Taphonomy - Alberta - Grassy Lake Region
subject: Grassy Lake Region (Alta.) - Antiquities
subject: Arthropoda, Fossil
subject: Animal remains (Archaeology) - Alberta - Grassy Lake Region

description: Bibliography: p. 245-264.
description: A taphonomic model of processes affecting samples of amber inclusions is outlined. Comparison of collecting methods indicates that significant amounts of amber are overlooked by traditional methods. Screened samples produce more inclusions with lower between-sample variation and more Homoptera per kilogram of amber. Collecting method affects the paleoecological and paleoenvironmental interpretation of samples. Community structure and organization can be more accurately described and compared using screened samples. Also, changes in terrestrial arthropod diversity can be more accurately measured. Comparison is difficult if samples have been collected by different methods and will produce poorer results. Data from resin in a modern forest correspond well with fossil resin data. Mesozoic resins (120 to 75 million years old) trapped arthropod taxa very consistently. Cenozoic resins trapped arthropods in almost the same manner as measured by taxon rank, but presented very different taxon percentages. Differences between Cenozoic and Cretaceous taxon ranks are due to changes in arthropod faunas. Acari, Collembola, and Lepidoptera are the best candidates for study of changes in diversity and abundance. There are about 130 hexapod species recognized in this deposit, the most diverse Cretaceous insect assemblage known. Of 65 identified families, 15 are extinct. Only one of about 77 genera identified is extant. All recognized species are extinct. Morphology and feeding structures are within the variation seen in modern insects. The taxonomic structure of modern insect communities was well established before the end of the Cretaceous, with few exceptions.
Zero-temperature transition and correlation-length exponent of the frustrated XY model on a honeycomb lattice
Creators: name: Granato, Enzo
Publisher: name: arXiv
Year: 2012
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Phase coherence and vortex order in the fully frustrated XY model on a two-dimensional honeycomb lattice are studied by extensive Monte Carlo simulations using the parallel tempering method and finite-size scaling. No evidence is found for an equilibrium order-disorder or a spin/vortex-glass transition, suggested in previous simulation works. Instead, the scaling analysis of correlations of phase and vortex variables in the full equilibrated system is consistent with a phase transition where the critical temperature vanishes and the correlation lengths diverge as a power-law with decreasing temperatures and corresponding critical exponents $ν_{ph}$ and $ν_{v}$. This behavior and the near agreement of the critical exponents suggest a zero-temperature transition scenario where phase and vortex variables remain coupled on large length scales.
description: 8 pages, 10 figures
American PRICELESS: the origin and evolution of United States Mediterranean Strategy and the acceptance of Italian mainland operations during the Second World War
Creators: name: Plummer, Douglas A. (Douglas Andrew)
Publisher: name: University of Calgary
Year: 1995
Subjects: subject: D 766 P68 1995
subject: World War, 1939-1945 - Campaigns - Mediterranean area
subject: World War, 1939-1945 - Campaigns - Italy
subject: World War, 1939-1945 - Campaigns - United States
subject: Strategy
subject: Mediterranean region - Strategic aspects

description: Bibliography: p. 135-139.
title: Novel approaches to aminoglycoside-induced nephrotoxicity in children
Creators: name: McWilliam, Stephen
Publisher: name: University of Liverpool Repository
Year: 2016

description: Background: Aminoglycoside antibiotics are commonly used in paediatric clinical practice, especially for the treatment of neonatal sepsis and pulmonary exacerbations in cystic fibrosis (CF). However, megalin-mediated endocytosis of the aminoglycosides by renal proximal tubule epithelial cells leads to toxicity, and may result in acute kidney injury and chronic kidney disease. Current approaches to identify and prevent toxicity are limited. Several novel biomarkers have shown utility in preclinical studies for the identification of aminoglycoside-induced nephrotoxicity, but clinical data and an understanding of their clinical utility is lacking. The potential of statins to prevent aminoglycoside-induced nephrotoxicity by inhibition of megalin-mediated endocytosis has been previously demonstrated in vitro and in a rat model, but its potential in man is unclear. Aims: Firstly, to investigate the utility of novel urinary biomarkers for the early identification of aminoglycoside-induced nephrotoxicity in children. Secondly, to develop a novel intervention using statins to prevent aminoglycoside-induced nephrotoxicity in children with CF. Methods and Results: Urine samples were collected from 41 premature neonates at least once per week, and daily during courses of gentamicin. Three urinary biomarkers were measured using Luminex-based (Kidney Injury Molecule-1 (KIM-1) and Neutrophil Gelatinase-associated Lipocalin (NGAL)) and colorimetric assays (N-acetyl-β-D-glucosaminidase (NAG)). All three biomarkers were elevated during treatment with gentamicin, but when adjusted for potential confounders, only the elevation in KIM-1 remained significant (mean difference from not treated, 1.35ng/mg urinary creatinine; 95% CI 0.05-2.65). Electrochemiluminescent assays for both KIM-1 and NGAL were validated, and were compared to Luminex-based assays by analysing samples from healthy children in the UK (n=120) and the US (n=171). 95% reference intervals for both biomarkers were derived using quantile regression. Urine samples were collected from a cohort of children with cystic fibrosis (n=158) at outpatient clinic appointments and during exposure to tobramycin. Biomarkers were measured using the validated electrochemiluminescent assays. Elevations in both KIM-1 and NGAL (median peak fold-change was 2.28 (IQR 2.69) and 4.02 (IQR 7.29) respectively) were observed during exposure to tobramycin. In a multiple regression model, baseline KIM-1 was associated with the number of previous courses of IV aminoglycoside (p
Outflows from AGN: Kinematics of the Narrow-Line and Coronal-Line Regions in Seyfert Galaxies
Creators: name: Müller-Sánchez, F.
name: Prieto, A.
name: Hicks, E. K. S.
name: Vives-Arias, H.
name: Davies, R. I.
name: Malkan, M.
name: Tacconi, L. J.
name: Genzel, R.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: As part of an extensive study of the physical properties of active galactic nuclei (AGN) we report high spatial resolution near-IR integral-field spectroscopy of the narrow-line region (NLR) and coronal-line region (CLR) of seven Seyfert galaxies. These measurements elucidate for the first time the two-dimensional spatial distribution and kinematics of the recombination line Brγ and high-ionization lines [Sivi], [Alix] and [Caviii] on scales <300 pc from the AGN. The observations reveal kinematic signatures of rotation and outflow in the NLR and CLR. The spatially resolved kinematics can be modeled as a combination of an outflow bicone and a rotating disk coincident with the molecular gas. High-excitation emission is seen in both components, suggesting it is leaking out of a clumpy torus. While NGC 1068 (Seyfert 2) is viewed nearly edge-on, intermediate-type Seyferts are viewed at intermediate angles, consistent with unified schemes. A correlation between the outflow velocity and the molecular gas mass in r<30 pc indicates that the accumulation of gas around the AGN increases the collimation and velocity of the outflow. The outflow rate is 2-3 orders of magnitude greater than the accretion rate, implying that the outflow is mass-loaded by the surrounding interstellar medium (ISM). In half of the observed AGN the kinetic power of the outflow is of the order of the power required by two-stage feedback models to be thermally coupled to the ISM and match the M-σ* relation. In these objects the radio jet is clearly interacting with the ISM, indicative of a link between jet power and outflow power.
description: 93 pages, including 32 figures and 8 tables, Accepted for publication in ApJ, Version with high resolution figures available at http://www.iac.es/galeria/fmueller/docs/outflows_fms.pdf
Genetic stock composition analysis of chum salmon from the prohibited species catch of the 2014 Bering Sea walleye pollock trawl fishery and Gulf of Alaska groundfish fisheries.
Creators: name: Kondzela, Christine M.
name: Whittle, J. A.
name: Yates, D.
name: Vulstek, Scott C.
name: Nguyen, Hv. T.  (Hanhvan T.)
name: Guyon, Jeffrey Robert
Publisher: name: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Alaska Fisheries Science Center.
Year: 2016
Subjects: subject: Chum salmon--Bering Sea--Genetics--Analysis.
subject: Chum salmon--Alaska--Alaska, Gulf of--Genetics--Analysis.

description: A genetic analysis of the prohibited species catch (PSC) of chum salmon (Oncorhynchus keta) collected during 2014 from the federally managed walleye pollock (Gadus chalcogrammus) trawl fishery in the Bering Sea and the federal groundfish fisheries in the Gulf of Alaska (GOA) was undertaken to determine the overall stock composition of the sample sets. Samples were genotyped for 11 microsatellite markers from which stock contributions were estimated using the current chum salmon microsatellite baseline. In 2014, one genetic sample was collected for every 30.2 chum salmon caught in the Bering Sea midwater trawl fishery. The evaluation of sampling in the Bering Sea based on time, location, and vessel indicated that the genetic samples were representative of the total chum salmon PSC in the Bering Sea. Based on the analysis of 1,741 chum salmon collected throughout the 2014 Bering Sea trawl fishery, the largest stock group in the catch was Northeast Asia (37%), followed by Eastern GOA/Pacific Northwest (PNW) (24%), Southeast Asia (19%), Western Alaska (18%), Upper/Middle Yukon (2%), and Southwest Alaska (< 1%) stocks. The regional stock estimates for the 2014 chum salmon caught in the Bering Sea were similar to those in 2013, with the exception of a lower contribution from Upper/Middle Yukon stocks in 2014. As in previous years, there were some significant differences in stock proportions throughout the season and across areas. For the first time, a small set of chum salmon samples from the GOA groundfish fisheries were available for genetic analysis. The highest proportion of the 273 chum salmon sampled in the GOA groundfish fisheries were from Eastern GOA/PNW (92%) stocks.
Behavior of nearby synchronous rotation of a Poincaré-Hough satellite at low eccentricity
Creators: name: Noyelles, Benoît
Publisher: name: arXiv
Year: 2011
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: This paper presents a study of the Poincaré-Hough model of rotation of the synchronous natural satellites, in which these bodies are assumed to be composed of a rigid mantle and a triaxial cavity filled with inviscid fluid of constant uniform density and vorticity. In considering an Io-like body on a low eccentricity orbit, we describe the different possible behaviors of the system, depending on the size, polar flattening and shape of the core. We use for that the numerical tool. We propagate numerically the Hamilton equations of the systems, before expressing the resulting variables under a quasi-periodic representation. This expression is obtained numerically by frequency analysis. This allows us to characterize the equilibria of the system, and to distinguish the causes of their time variations. We show that, even without orbital eccentricity, the system can have complex behaviors, in particular when the core is highly flattened. In such a case, the polar motion is forced by several degrees and longitudinal librations appear. This is due to splitting of the equilibrium position of the polar motion. We also get a shift of the obliquity when the polar flattening of the core is small.
Graphene coatings: An efficient protection from oxidation
Creators: name: Topsakal, M.
name: Şahin, H.
name: Ciraci, S.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We demonstrate that graphene coating can provide an efficient protection from oxidation by posing a high energy barrier to the path of oxygen atom, which could have penetrated from the top of graphene to the reactive surface underneath. Graphene bilayer, which blocks the diffusion of oxygen with a relatively higher energy barrier provides even better protection from oxidation. While an oxygen molecule is weakly bound to bare graphene surface and hence becomes rather inactive, it can easily dissociates into two oxygen atoms adsorbed to low coordinated carbon atoms at the edges of a vacancy. For these oxygen atoms the oxidation barrier is reduced and hence the protection from oxidation provided by graphene coatings is weakened. Our predictions obtained from the state of the art first-principles calculations of electronic structure, phonon density of states and reaction path will unravel how a graphene can be used as a corrosion resistant coating and guide further studies aiming at developing more efficient nanocoatings.
description: under review in PRB; http://link.aps.org/doi/10.1103/PhysRevB.85.155445
title: A computational fluid dynamics analysis of the distraction forces experienced by stent-grafts following fenestrated Endovascular Aneurysm Repair
Creators: name: Jones, Steven
Publisher: name: University of Liverpool Repository
Year: 2016

description: Introduction One option for repair of abdominal aortic aneurysms with inadequate length of infrarenal neck is fenestrated Endovascular Aneurysm Repair. Significant complications may be caused by stent-graft migration and component distraction which are both resisted by fixation force and provoked by haemodynamic distraction force. The hypotheses tested in this thesis are that larger angulation of vessels is associated with greater distraction force and that greater distraction force is associated with higher incidence of migration and component distraction. Method Interobserver variation of a new method of angle measurement was compared with the standard method currently in use in our unit. Computer models of complete fenestrated stent-grafts and their individual components (proximal body, distal body and limb extensions) were then constructed based on the postoperative computed tomography scans of 54 patients. Computational Fluid Dynamic analysis in steady state was used to quantify the distraction force acting on each device. Blood pressure was kept constant at 160mmHg and the impact of morphological features upon distraction force was assessed. To test the second hypothesis, patient-specific blood pressures were used to obtain in situ distraction forces that were then related to the incidence of migration and component distraction. Results There were no significant differences between the old and new methods of angle measurement (p=.723, WSR). Inlet cross-sectional area (XSA) exhibited a strong, positive correlation with total RDF in complete stent-grafts, proximal body and distal body components. Outlet angulation ≥45° was significantly associated with greater total RDF in complete stent-grafts and limb extension components (Median total RDF in complete stent-grafts with angle
title: Risk-sensitive control for a class of non-linear systems and its financial applications
Creators: name: Fei, Fan
Publisher: name: University of Liverpool Repository
Year: 2016

description: This thesis studies the risk-sensitive control problem for a class of non-linear stochastic systems and its financial applications. The nonlinearity is of the square- root type, and is inspired by applications. The problems of optimal investment and consumption are also considered under several different assumptions on the stochastic interest rate and stochastic volatility. At the beginning, we systematically investigate the nonlinearity of risk-sensitive control problem. It consists of quadratic and square-root terms in the state. Such an optimal control problem can be solved in an explicit closed form by the completion of squares method. As an application of the risk-sensitive control in financial mathematics, the optimal investment problem will be described in the Chapter 4. A new interest rate, which follows the stochastic process with mixed Cox- Ingersoll-Ross (CIR) model and quadratic affine term structure model (QATSM) is introduced. Such an interest rate model admits an explicit price for the zero- coupon bond. In Chapter 5, we consider a portfolio optimization problem on an infinite time horizon. The stochastic interest rate consists not only of the quadratic terms, but also of the square-root terms. On the other hand, the double square root process is also introduced to establish the interest rate model. Under some sufficient conditions, the unique solution of the optimal investment problem is found in an explicit closed form. Furthermore, the optimal consumption problem is considered in Chapter 6 and 7. It can be solved in an explicit closed form via the methods of completion of squares and the change of measure. We provide a detailed discussion on the existence of the optimal trading strategies. Such trading strategies can be deduced for both finite and infinite time horizon cases.
title: Planning and talking to help minimise distress associated with death, dying and bereavement: The role of public health
Creators: name: Abba, Katharine
Publisher: name: University of Liverpool Repository
Year: 2016

description: Abstract Background People who are dying, caring for somebody who is dying, or have been bereaved can experience problems such as isolation, depression and anxiety. Some of these problems might be reduced if people were better prepared for death and were able to support one another when they were affected by death. There has been little previous research into how public health interventions might encourage these changes at a population level. This thesis aimed to explore this subject with a particular focus on talking to family and friends about end of life preparations and preferences. The research was embedded within the new and innovative Cheshire Living Well Dying Well (CLWDW) public health programme, which was established to address the issues described. Methods Mixed methods were used. A quantitative follow-up survey was used to test a CLWDW intervention to encourage people to prepare for the end of their life and to discuss their end of life preferences with the people closest to them. A qualitative interview study was used to explore the wider context in which people talk with one another about issues relating to death and dying. Findings The CLWDW interactive presentations delivered to community groups and to people working in health and social care were well received and effective in encouraging appropriate actions. Of respondents who completed follow-up at three months post-event (28% response rate), 60% reported that they had made a change or taken some action as a result of the event, including 43% who had talked with somebody about their own end of life wishes. In interviews, participants of all ages expressed the view that death, particularly bereavement, was a crucial issue and that it was important to prepare for and to talk about death and bereavement. Various barriers to talking about, preparing for and supporting people affected by death were described, as were various ideas to support improvement. Conclusions Most people in the UK consider it important to be prepared for end of life and death, although many have not made these preparations. In the right circumstances, most are willing and able to talk openly about death and dying, including their own end of life preferences. Appropriate population-level interventions to encourage these behaviours can be well received and effective.
title: Network enabled capability of remote operation: systems engineering and human factors
Creators: name: Davis, John
Publisher: name: University of Liverpool Repository
Year: 2016

description: Air-to-surface weapons, and the platforms that deliver them, are becoming increasingly automated and remote from operators. The benefits of remotely operated systems have been widely documented, yet the question of accountability remains an issue - both from a legal standpoint and with regards to public opinion. The current focus of the military and industry is to develop weapons with more autonomy and an increased range. This motivation is part of a wider aim for Network Enabled Capability across all military forces. This thesis focuses on one aspect of Network Enabled Capability, the remote re-tasking of air-to-surface weapons in flight. The aim being to explore the potential capabilities of the human operator that may use such a system. Further, this thesis sets out to investigate the differences between using an automated system for re-tasking air-to-surface missiles in flight as opposed to assigning the task to a human operator. A simulation test-bed facility was established to investigate these research aims. The development of this system first required a complete simulation of two air to surface weapon systems, a generic guided bomb, and an extended range missile. These simulation models were integrated into the test-bed facility to allow real-time targeting and firing of the weapon systems in a 3D simulation environment. Two participant trials were carried out to test firstly, the operator terminal designed for task of re-tasking air-to-surface weapons in flight, and secondly, the operator capacity limits when re-tasking multiple air-to-surface weapons against multiple defended targets. These trials found that the system developed was suitable for the task, with interesting results that prove counter to current expectations of operator performance. Further, operator capacity was found to be at a level that can compete with an ideal automated re-tasking system.