cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Education, awareness, and re-localization
Creators: name: Vititpong, Isabel
name: Primea, Shawna
name: Poon, Winnie
name: McLennan, Abby
name: Ireland, Shawna
name: Leung, Emily
name: Ding, Junyan
name: Brown, Courtenay
Publisher: name: The University of British Columbia
Year: 2014

description: The loss of control over our food system has progressed steadily over the last few decades as people have become increasingly psychologically and physically distanced from their food. One answer to this predicament is the re-localization of the food system, which is the concept of buying food grown or produced as close to your home as possible. The principal problem is that consumers and food providers lack awareness to support local food producers. Thus, there is a need to increase the education and awareness regarding the benefits of local food systems. Our working team has prepared an educational campaign in association with the AMS Food and Beverage Department in an effort to increase the awareness of the benefits of re-localization on the UBC campus. As part of this campaign, we have created an educational pamphlet and a resource binder, which will directly target AMS Food and Beverage staff and indirectly target UBC food consumers. Our ultimate goal is to increase interest in the sustainable food movement; especially among food workers in the hope of encouraging them to participate and take a personal stand to spread awareness. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Representations of tensor rotations and the geometry of spin 1/2
Creators: name: Bühler, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Making use of the real sl(2,R) Lie group algebra generating a spin 1/2 Lie group allows to create an explicitly given Lorentz invariant fermion wave. As the generators are real valued they can be interpreted as a deformation tensor in particular as a deformation tensor of space. Therefore, it is possible to model a heuristic purely geometric representation of spin 1/2 in Minkowski space. However the bigger surprise is that this wave has the space-time structure of gravitational waves, which are understood to be spin 2 waves. Given that the uniqueness of angular momentum representations still holds, the examination of tensor rotations reveals the existence of different representations of tensor rotations with a different angular parameter due to an unaccounted basic symmetry of symmetric tensors, where the spin 1/2 representation is a specific representation of tensor rotations corresponding to the quantum theoretical approach. The seeming contradiction is fully resolved and allows in addition to understand the notion of different representations of spin in tensors, again related to different representations of the tensor.
description: 5 pages,1 figure
From pink slips to pink sheets : liquidity and shareholder wealth consequences of Nasdaq delistings
Creators: name: Angel, James J.
name: Harris, Jeffrey
name: Panchapagesan, Venkatesh
name: Werner, Ingrid M.
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 35
subject: Commerce, management, tourism and services

description: Description to be added
Note on the luminosity distance
Creators: name: Malec, Edward
name: Wylȩżek, Grzegorz
name: Karkowski, Janusz
Publisher: name: arXiv
Year: 2004
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We re-derive a formula relating the areal and luminosity distances, entirely in the framework of the classical Maxwell theory, assuming a geometric-optics type condition.
description: Section 4 revised, misprints corrected
Additional file 5 of HCV eradication with IFN-based therapy does not completely restore gene expression in PBMCs from HIV/HCV-coinfected patients
Creators: name: Brochado, Óscar
name: Martínez, Isidoro
name: Berenguer, Juan
name: Medrano, Luz
name: González-García, Juan
name: Jiménez-Sousa, María Ángeles
name: Carrero, Ana
name: Hontañón, Víctor
name: Navarro, Jordi
name: Guardiola, Josep M.
name: Fernández-Rodríguez, Amanda
name: Resino, Salvador
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: 60506 Virology

description: Additional file 5: Table S5. Summary of significant KEGG pathways (FDR ≤0.05) in the HIV/HCV-f versus HIV-mono comparison.
Understanding XANES spectra of two-temperature warm dense copper using ab initio simulation
Creators: name: Jourdain, N.
name: Recoules, V.
name: Lecherbourg, L.
name: Renaudin, P.
name: Dorchies, F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Using ab initio molecular-dynamics simulations combined with linear-response theory, we studied the x-ray absorption near-edge spectra (XANES) of a two-temperature dense copper plasma. As the temperature increases, XANES spectra exhibit a pre-edge structure balanced by a reduction of the absorption just behind the edge. By performing systematic simulations for various thermodynamic conditions, we establish a formulation to deduce the electronic temperature Te directly from the spectral integral of the pre-edge that can be used for various thermodynamic conditions encountered in a femtosecond heating experiment where thermal non equilibrium and expanded states have to be considered.
description: 9 pages, 10 figures submitted to Physical Review B
title: Early diagnosis and prognosis of severe dengue
Creators: name: Nguyen, Minh Tuan
Publisher: name: The Open University
Year: 2016

description: Dengue is considered as an emerging infectious disease with a wide expansion to more than 100 countries and territories in the world. Dengue has great social, economic and health impacts on endemic regions causing the disease burden to the community and becoming one of the most serious public health concerns. We described clinical and virological features of paediatric dengue cases in southern Vietnam in a large prospective cohort study. We used the new classification of WHO 2009 to include dengue shock syndrome, severe bleeding and organ failure in the category of severe dengue in data analysis. Of 7544 patients enrolled into the study with complete haemobiochemical results available, 2060 patients (27.3%) had laboratory- confirmed diagnosis of dengue. The number of cases with severe dengue, dengue requiring parenteral fluids and uncomplicated dengue was 117 (5.7%), 156 (7.6%) and 1787 (86.7%) respectively. Proportions of RT-PCR positivity in the groups of severe dengue, dengue requiring parenteral fluids and uncomplicated dengue was 115/117 (98.3%), 149/156 (95.5%) and 1690/1787 (94.6%) respectively. It is a challenge for attending physicians in the outpatient settings to recognize early dengue patients. A simple tool, called Early Dengue Classifier (EDC), including information of age, white blood cell and platelet counts can be used alone or in combination with the NS1 rapid test to make early diagnosis of dengue within 72 hours of onset illness. We demonstrate that the early diagnosis of dengue can be enhanced beyond the current standard of care using a simple evidence-based algorithm. A prognostic algorithm using vomiting, platelet count, aspartate aminotransferase and NS1 rapid test result, called Early Severe Dengue Identifier (ESDI), can predict severe complications. Though the positive predictive value of the ESDI was low as seen with common prognostic models for a rare outcome, the results should support patient management and clinical trials of specific therapies.
Sustainable food systems : not in the plan : the incorporation of food systems into campus planning at UBC
Creators: name: Adlparvar, Emily
name: Bruchet, Marie
name: Dodd, Danielle
name: Irvine, Joanna
name: Leung, Tim
name: Powell, Julien
name: Vogt, Kara
Publisher: name: The University of British Columbia
Year: 2014

description: Sustainable systems such as the food system need to be considered in campus planning. The importance of a sustainable food system at UBC has been acknowledged. However, as of yet, no concrete plan exists to integrate food systems into campus planning at the university. Before food systems can be included in campus planning, a clear outline of the university’s vision of a sustainable food system is necessary. We propose a set of objectives as our vision. These objectives are not identical to those decided by previous colleagues in AGSC 450 and the differences are discussed. This paper outlines the reasons and importance for integrating food systems into campus planning and provides recommendations in two key forms: 1) Mechanisms of addressing food systems in the Main Campus Plan (MCP) – the plan for institutional development at UBC, and 2) The development of a Supplementary Food System Plan. The goals and purpose of the MCP display inherent limitations to the extent that food systems can be included at this level. The MCP is intended to be a more general plan, which provides ultimate objectives but no specific mechanisms for achieving these goals. However, as these specific mechanisms are fundamental components of fulfilling objectives for a sustainable campus food system, we propose a supplementary plan for food systems. This plan would be supplementary to the MCP and can provide specific actions needed en route to a sustainable food system. Even though we provide a list of ways to attain sustainability in food systems at UBC, there are evidently missing pieces and a need for further detail and development of this plan. Consequently, we conclude with several recommendations for campus leaders of sustainability and for future AGSC 450 students. Disclaimer: “UBC SEEDS provides students with the opportunity to share the findings of their studies, as well as their opinions, conclusions and recommendations with the UBC community. The reader should bear in mind that this is a student project/report and is not an official document of UBC. Furthermore readers should bear in mind that these reports may not reflect the current status of activities at UBC. We urge you to contact the research persons mentioned in a report or the SEEDS Coordinator about the current status of the subject matter of a project/report.”
Fundamentals, trader activity and derivative pricing
Creators: name: Buyuksahin, Bahattin
name: Haigh, Michael S.
name: Harris, Jeffrey
name: Overdahl, James A.
name: Robe, Michel A.
Publisher: name: American University
Year: 2023

description: We identify and explain a structural change in the relation between crude oil futures prices across contract maturities. As recently as 2001, near- and long-dated futures were priced as though traded in segmented markets. In 2002, however, the prices of one-year futures started to move more in sync with the price of the nearby contract. Since mid-2004, the prices of both the one-year-out and the two-year-out futures have been cointegrated with the nearby price. We link this transformation to changes in fundamentals, as well as to sea changes in the maturity structure and trader composition of futures market activity. In particular, we utilize a unique dataset of individual trader positions in exchange-traded crude oil options and futures to show that increased market activity by commodity swap dealers, and by hedge funds and other financial traders, has helped link crude oil futures prices at different maturities.
Lepton Flavor Violation, Neutralino Dark Matter and the Reach of the LHC
Creators: name: Masiero, A.
name: Profumo, S.
name: Vempati, S. K.
name: Yaguna, C. E.
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We revisit the phenomenology of the Constrained MSSM with right-handed neutrinos (CMSSMRN). A supersymmetric seesaw mechanism, generating neutrino masses and sizable lepton flavour violating (LFV) entries is assumed to be operative. In this scheme, we study the complementarity between the `observable ranges' of various paths leading to the possible discovery of low energy SUSY: the reach of the Cern Large Hadron Collider (LHC), the quest for neutralino dark matter signals and indirect searches through LFV processes. Within the regions of the CMSSMRN parameter space compatible with all cosmo-phenomenological requirements, those which are expected to be probed at the LHC will be typically also accessible to upcoming LFV experiments. Moreover, parameter space portions featuring a heavy SUSY particle spectrum could be well beyond LHC reach while leaving LFV searches as the only key to get a glimpse on SUSY.
description: 31 pages, 12 figures, LateX; v2: one reference and one comment added; matches with published version
Optimizing Geometry Compression using Quantum Annealing
Creators: name: Feld, Sebastian
name: Friedrich, Markus
name: Linnhoff-Popien, Claudia
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Geometry (cs.CG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The compression of geometry data is an important aspect of bandwidth-efficient data transfer for distributed 3d computer vision applications. We propose a quantum-enabled lossy 3d point cloud compression pipeline based on the constructive solid geometry (CSG) model representation. Key parts of the pipeline are mapped to NP-complete problems for which an efficient Ising formulation suitable for the execution on a Quantum Annealer exists. We describe existing Ising formulations for the maximum clique search problem and the smallest exact cover problem, both of which are important building blocks of the proposed compression pipeline. Additionally, we discuss the properties of the overall pipeline regarding result optimality and described Ising formulations.
description: 6 pages, 3 figures
Dynamics and Non-Gaussianity in the Weak-Dissipative Warm Inflation Scenario
Creators: name: Gupta, Sujata
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We calculate the general solutions for a warm inflationary scenario with weak dissipation, reviewing the dissipative dynamics of the two-fluid system, and calculate the bispectrum of the gravitational field fluctuations generated in the case where dissipation of the vacuum potential during inflation is the mechanism for structure formation, but is the sub-dominant effect in the dynamics of the scalar field during slow-roll. The bispectrum is non-zero because of the self-interaction of the scalar field. We compare the predictions with both those of standard, or `supercooled', inflationary models, and warm inflation models with strong dissipation and consider the detectability of these levels of non-Gaussianity in the bispectrum of the cosmic microwave background. We find that the levels of non--Gaussianity for warm and supercooled inflation are an order of magnitude different.
description: Replaced with version accepted for publication in Phys. Rev. D., minor changes; 7 pages, LateX
Supplementary appendix for: Hierarchical fear: parental behaviour and corticosterone release mediate nestling growth in response to predation risk
Creators: name: Zwaan, Devin De
Publisher: name: figshare
Year: 2020
Subjects: subject: Ecology
subject: FOS: Biological sciences

description: Nestling development, a critical life-stage for altricial songbirds, is highly vulnerable to predation, particularly for open-cup nesting species. Since nest predation risk increases cumulatively with time, rapid growth may be an adaptive response that promotes early fledging. However, greater predation risk can reduce parental provisioning rate as a risk aversion strategy and subsequently constrain nestling growth, or directly elicit a physiological response in nestlings with adaptive or detrimental effects on development rate. Despite extensive theory, evidence for the relative strength of these effects on nestling development in response to prevailing predation risk and the underlying mechanisms remain unclear. For an alpine population of horned lark (Eremophila alpestris), we elevated perceived predation risk (decoys/playback) during the nestling stage to assess the influence of predator cues and parental care on nestling wing growth and the glucocorticoid hormone corticosterone. We used piecewise path analysis to test a hypothesized causal response structure composed of direct and indirect pathways. Nestlings under greater perceived predation risk reduced corticosterone and increased wing growth, resulting in an earlier age at fledge. This represented both a direct response that was predator-specific, and an indirect response dependent on parental provisioning rate. Parents that reduced provisioning rate most severely in response to predator cues had smaller nestlings with greater corticosterone. Model comparisons indicated the strongest support for a directed, causal influence of corticosterone on nestling wing growth, highlighting corticosterone as a potential physiological mediator of the nestling growth response to predation risk. Finally, cold temperatures prior to the experiment constrained wing growth closer to fledge, illustrating the importance of considering the combined influence of weather and predation risk across developmental stages. We present the first study to separate the direct and indirect effects of predation risk on nestling development in a causal, hierarchical framework that incorporates corticosterone as an underlying mechanism and provides experimental evidence for an adaptive developmental response to predation risk in ground-nesting songbirds.
Fundamentals, trader activity and derivative pricing
Creators: name: Buyuksahin, Bahattin
name: Haigh, Michael S.
name: Harris, Jeffrey
name: Overdahl, James A.
name: Robe, Michel A.
Publisher: name: American University (Washington, D.C.)
Year: 2023
Subjects: classificationCode: 35
subject: Commerce, management, tourism and services

description: We identify and explain a structural change in the relation between crude oil futures prices across contract maturities. As recently as 2001, near- and long-dated futures were priced as though traded in segmented markets. In 2002, however, the prices of one-year futures started to move more in sync with the price of the nearby contract. Since mid-2004, the prices of both the one-year-out and the two-year-out futures have been cointegrated with the nearby price. We link this transformation to changes in fundamentals, as well as to sea changes in the maturity structure and trader composition of futures market activity. In particular, we utilize a unique dataset of individual trader positions in exchange-traded crude oil options and futures to show that increased market activity by commodity swap dealers, and by hedge funds and other financial traders, has helped link crude oil futures prices at different maturities.
Tuning the distance to the equipartition by controlling the collision rate in a driven granular gas experiment
Creators: name: Castillo, Gustavo
name: Merminod, Simon
name: Falcon, Eric
name: Berhanu, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In a granular gas experiment of magnetized particles confined in a thin layer, the rate of dissipative collisions is tuned by adjusting the amplitude of an external magnetic field. The velocity statistics are analyzed using the dynamic and static structure factors of transverse velocity modes. Using the fluctuating hydrodynamics theory we measure the deviation from kinetic energy equipartition in this out-of-equilibrium system as a function of the dissipative collision rate. When the collision rate is decreased, the distance to equipartition becomes smaller meaning that the dynamical properties of this granular gas approach by analogy those of a molecular gas in thermal equilibrium.
description: 9 pages, 4 figures Accepted to Physical Review E
Vortex behavior near a spin vacancy in 2D XY-magnets
Creators: name: Pereira, A. R.
name: Mol, L. A. S.
name: Leonel, S. A.
name: Coura, P. Z.
name: Costa, B. V.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Condensed Matter (cond-mat)
subject: FOS: Physical sciences

description: The dynamical behavior of anisotropic two dimensional Heisenberg models is still a matter of controversy. The existence of a central peak at all temperatures and a rich structure of magnon peaks are not yet understood. It seems that the central peaks are related, in some way, to structures like vortices. In order to contribute to the discussion of the dynamical behavior of the model we use Monte Carlo and spin dynamics simulations as well analytical calculations to study the behavior of vortices in the presence of nonmagnetic impurities. Our simulations show that vortices are attracted and trapped by the impurities. Using this result we show that if we suppose that vortices are not very much disturbed by the presence of the impurities, then they work as an attractive potential to the vortices explaining the observed behavior in our simulations.
description: 4 pages, 6 figures
How has consumer education influenced pork consumption in South Africa? Instrumental variable regression analysis
Creators: name: Lubinga, H. Moses
name: Ngqangweni, Simphiwe
name: Mazibuko, Ndumiso
name: Balarane, Abongile
name: Nyhodo, Bonani
name: Lubinga, H. Moses
name: Ngqangweni, Simphiwe
name: Mazibuko, Ndumiso
name: Balarane, Abongile
name: Nyhodo, Bonani
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Consumer/Household Economics
subject: Food Consumption/Nutrition/Food Safety
subject: Food Security and Poverty
subject: Health Economics and Policy
subject: Marketing
subject: FOS: Economics and business
subject: Productivity Analysis
subject: Consumer education
subject: Pork consumption
subject: Instrumental Variable Regression Analysis
subject: Health and Nutrition
subject: Tastes and Preferences
subject: South African Pork Producers Organization
subject: marketing of Agricultural Products Act

description: We evaluate the impact of consumer education on pork consumption in South Africa by using time series data on levy expenditure on consumer education over a ten-year period. Furthermore, we introduce quantitative measures of two non-economic factors (health and nutrition, and tastes and preferences) based on previous research which indicates that they are important drivers of meat consumption. We employ an instrumental variable regression analytical framework. To account for the dynamic response of consumer education effects on consumption patterns, a lagged variable for expenditure on consumer education is included in the specified model. The positive estimate (0.045) on consumer education is highly significant, implying that consumer education is associated with a 4.5% increase in pork consumption. In concurrence with previous studies, findings show that peoples’ tastes and preferences for processed pork products positively impact on pork consumption while health and nutrition (severe malnutrition) exhibits a negative effect on pork consumption. As recommendation, consumer education should focus more on the low-income earners since this segment of the population accounts for a relatively small proportion (10%) of total pork consumed.
Microscopic Diagnosis of Universal Geometric Responses in Fractional Quantum Hall Liquids
Creators: name: Hu, Liangdong
name: Liu, Zhao
name: Sheng, D. N.
name: Haldane, F. D. M.
name: Zhu, W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Topological quantum liquids contain internal degrees of freedom that are coupled to geometric response. Yet, an explicit and microscopic identification of geometric response remains difficult. Here, taking notable fractional quantum Hall (FQH) states as typical examples, we systematically investigate a promising protocol -- the Dehn twist deformation on the torus geometry, to probe the geometric response of correlated topological states and establish the relation between such response and the universal properties of pertinent states. Based on analytical derivations and numerical simulations, we find that the geometry-induced Berry phase encodes novel features for a broad class of FQH states at the Laughlin, hierarchy, Halperin and non-Abelian Moore-Read fillings. Our findings conclusively demonstrate that the adiabatic Dehn twist deformation can faithfully capture the geometry of elementary FQH droplets and intrinsic modular information including topological spin and chiral central charge. Our approach provides a powerful way to reveal topological orders of generic FQH states and allows us to address previously open questions.
description: 20 pages, 14 figures
Initial listing decisions of firms that go public, the
Creators: name: Corwin, Shane A.
name: Harris, Jeffrey
Publisher: name: Financial Management
Year: 2023
Subjects: classificationCode: 35
subject: Commerce, management, tourism and services

description: We identify and explain a structural change in the relation between crude oil futures prices across contract maturities. As recently as 2001, near- and long-dated futures were priced as though traded in segmented markets. In 2002, however, the prices of one-year futures started to move more in sync with the price of the nearby contract. Since mid-2004, the prices of both the one-year-out and the two-year-out futures have been cointegrated with the nearby price. We link this transformation to changes in fundamentals, as well as to sea changes in the maturity structure and trader composition of futures market activity. In particular, we utilize a unique dataset of individual trader positions in exchange-traded crude oil options and futures to show that increased market activity by commodity swap dealers, and by hedge funds and other financial traders, has helped link crude oil futures prices at different maturities.
Additional file 6 of HCV eradication with IFN-based therapy does not completely restore gene expression in PBMCs from HIV/HCV-coinfected patients
Creators: name: Brochado, Óscar
name: Martínez, Isidoro
name: Berenguer, Juan
name: Medrano, Luz
name: González-García, Juan
name: Jiménez-Sousa, María Ángeles
name: Carrero, Ana
name: Hontañón, Víctor
name: Navarro, Jordi
name: Guardiola, Josep M.
name: Fernández-Rodríguez, Amanda
name: Resino, Salvador
Publisher: name: figshare
Year: 2021
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Genetics
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: 110309 Infectious Diseases
subject: 60506 Virology

description: Additional file 6: Table S6. Summary of the most deregulated SDE genes (absolute FC ≥2 and FDR ≤0.05).
Initial listing decisions of firms that go public, the
Creators: name: Corwin, Shane A.
name: Harris, Jeffrey
Publisher: name: American University
Year: 2023

description: We identify and explain a structural change in the relation between crude oil futures prices across contract maturities. As recently as 2001, near- and long-dated futures were priced as though traded in segmented markets. In 2002, however, the prices of one-year futures started to move more in sync with the price of the nearby contract. Since mid-2004, the prices of both the one-year-out and the two-year-out futures have been cointegrated with the nearby price. We link this transformation to changes in fundamentals, as well as to sea changes in the maturity structure and trader composition of futures market activity. In particular, we utilize a unique dataset of individual trader positions in exchange-traded crude oil options and futures to show that increased market activity by commodity swap dealers, and by hedge funds and other financial traders, has helped link crude oil futures prices at different maturities.
title: An investigation of fatigue crack growth acceleration
Creators: name: Doré, Matthew James
Publisher: name: The Open University
Year: 2015

description: The problem of fatigue crack growth acceleration was investigated in crack propagation studies and endurance testing. The study was driven by the needs of designers and researchers alike, to provide a better understanding of the mechanisms associated with accelerated growth, and recommendations on the use of Miner's rule to calculate fatigue life under variable amplitude loading. The study was conducted on S355 structural steel and 6082 T6 aluminium alloy using centre-crack tension (CCT) specimens, with and without additional welding, and longitudinal fillet welded specimens. Crack growth rates under simple sequence loading and more complex variable amplitude (VA) loading, all cycling down from fixed tensile stress levels, were determined using optical or direct current potential' drop methods and scanning electron microscope examination of fracture surface striations. Under simple loading sequences, comprising two magnitudes of stress range, the presence of tensile underloads resulted in accelerated growth rates compared with those based on constant amplitude (CA) loading. Various possible mechanisms to explain crack growth acceleration and factors that might influence it, notably crack closure and welding residual stress, were evaluated. The most promising outcome came from finite element analysis (FEA) of the crack tip stress and strain. This showed that whereas under CA loading the material near the crack tip cycled about zero mean stress, the mean stress was tensile after the application of a tensile underload, thus resulting in a higher crack growth rate. Fatigue endurance testing of welded joints performed under the same types of loading confirmed that Miner's rule overestimated the actual lives, consistent with the occurrence of acceleration. Thus, it was concluded that modification of the principle and application of Miner's rule is required to allow for stress interactions that cause crack growth acceleration. Preliminary design recommendations were made.
Convectively driven decadal zonal accelerations in Earth's fluid core
Creators: name: More, Colin
name: Dumberry, Mathieu
Publisher: name: arXiv
Year: 2022
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Azimuthal accelerations of cylindrical surfaces co-axial with the rotation axis have been inferred to exist in Earth's fluid core on the basis of magnetic field observations and changes in the length-of-day. These accelerations have a typical timescale of decades. However, the physical mechanism causing the accelerations is not well understood. Scaling arguments suggest that the leading order torque averaged over cylindrical surfaces should arise from the Lorentz force. Decadal fluctuations in the magnetic field inside the core, driven by convective flows, could then force decadal changes in the Lorentz torque and generate zonal accelerations. We test this hypothesis by constructing a quasi-geostrophic model of magnetoconvection, with thermally-driven flows perturbing a steady, imposed background magnetic field. We show that when the Alfv\'{e}n number in our model is similar to that in Earth's fluid core, temporal fluctuations in the torque balance are dominated by the Lorentz torque, with the latter generating mean zonal accelerations. Our model reproduces both fast, free Alfv\'{e}n waves and slow, forced accelerations, with ratios of relative strength and relative timescale similar to those inferred for the Earth's core. The temporal changes in the magnetic field which drive the time-varying Lorentz torque are produced by the underlying convective flows, shearing and advecting the magnetic field on a timescale associated with convective eddies. Our results support the hypothesis that temporal changes in the magnetic field deep inside Earth's fluid core drive the observed decadal zonal accelerations of cylindrical surfaces through the Lorentz torque.
description: 29 pages, 9 figures
Geographical Indication (GI) in the wine industry: Does it matter?
Creators: name: Lubinga, H. Moses
name: Ngqangweni, Simphiwe
name: Nyhodo, Bonani
name: Potelwa, X. Yolanda
name: Van Der Walt, Stephanie
name: Phaleng, Lucius
name: Ntshangase, Thandeka
name: Lubinga, H. Moses
name: Ngqangweni, Simphiwe
name: Nyhodo, Bonani
name: Potelwa, X. Yolanda
name: Van Der Walt, Stephanie
name: Phaleng, Lucius
name: Ntshangase, Thandeka
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Crop Production/Industries
subject: Food Security and Poverty
subject: Industrial Organization
subject: International Relations/Trade
subject: Productivity Analysis
subject: Research Methods/ Statistical Methods
subject: Geographical indication
subject: Wine industry
subject: Wine exports
subject: Competitiveness

description: Despite the increasing competitiveness of South Africa’s wine industry globally and the industry’s outstanding number of geographical indications (GIs), the impact of these GIs on wine exports has not been assessed (and if it has been assessed such work is not publicly available or not seen by the authors). Understanding the impact of the GIs is critical in enhancing informed policy decisions towards securing more geographical indicators for wines and other products. In addition, the unearthed evidence may be the basis for more government interventions in support of the initiative while protecting the good reputation in communities where production occurs. Based on E-Bacchus database for GI, we use the gravity flow model framework to empirically analyse the effect of GI on South Africa’s wine exports to the European Union (EU). Three proxies are used to capture the impact of GI. Results suggest that GI fosters South Africa’s wine exports into the EU irrespective of the proxy used. With respect to the dummies, GI leads to an increase in South Africa’s wine exports by about 170 percent (0.169, p<0.1). When the actual number of GI names was used, the estimated coefficient (0.007, p<0.1) also suggests that GI enhances wine exports into the EU by 0.7 percent. While using the difference between the number of GI names for South Africa and EU, findings show that GI is associated with 87 percent increase in wine exports. Conclusively, GI positively impact on South Africa’s wine exports into the EU.
Stegana (Oxyphortica) yapingi Chen & Wang 2004, new species
Creators: name: Chen, Hong-wei
name: Wang, Bao-cheng
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Drosophilidae
Stegana
Stegana yapingi

description: Stegana (Oxyphortica) yapingi, new species
(Figs. 15-18)
 Material examined. – Holotype - male, MALAYSIA (BORNEO): Lambir, Sarawak, coll. M. J. Toda, 8 Jan.1999 (FRC).
Paratypes - MALAYSIA (BORNEO): 3 males, 4 females, same data as holotype (1 male, 2 females, FRC; 1 male, 1 female, SCAU; 1 male, 1 female, SEHU); Sabah, Poring: 2 females, 30 Dec.1998 (ITBC); 3 males, coll. M. J. Toda, 16 Mar.1999 (KPSP).
 Diagnosis. – Paramere broad, triangalar, strongly sclerotized basally (Figs. 17, 18); aedeagus short rod-like, apically hooked, basally with 1 pubescent flap attached to aedeagal apodeme (Figs. 17, 18).
 Description. – Thorax: Mesonotum submedially and laterally with black longitudinal stripes, 2 per side; submedial stripes not convergent on prescutum. Pleura with 2 long, black stripes: one below wing, the other from fore coxa to metapleura.
Wing: Black, yellow along posterior margin. Halter: stalk grey; apical part white.
Legs: Mid tibia basally with 2 long, strong postero-dorsal setae.
Abdominal tergites yellow, black on lateral and posterior margins. Sternites black, yellow on lateral margins.
Male terminalia: Epandrium not constricted mid-dorsally, broad laterally; with 1 row of long, strong setae along posterior margin and ca. 3 irregular rows of short setae near postero-ventral margin (Fig. 15). Surstylus lacking setae on outer surface (Fig. 16).
Measurements: BL = 6.10 mm in the holotype (range in 3 males and 3 females paratypes: 5.60-6.70 male, 5.70-7.15 female); ThL = 2.67 mm (2.50-3.00 male, 2.60-3.10 female); WL = 5.50 mm (5.00-6.00 male, 5.00-6.50 female); WW = 2.00 mm (1.80-2.20 male, 1.80-2.20 female).
Indices: arb = 12-13/7-8 (12-13/7-8); avd = 0.85 (0.80-0.90); adf = 3.50 (3.40-4.00); flw = 2.10 (1.90-2.10); FW/HW = 0.30; ch/o = 0.05 (0.06); prorb = 0.75 (0.70-0.80); rcorb = 0.55 (0.50-0.60); vb = 0.30 (0.30-0.35); dcl = 0.40 (0.45); presctl = 0.70 (0.70-0.75); sctl = 1.15 (1.00-1.15); sterno = 0.70 (0.70-0.80); orbito = 1.20 (1.20-1.40); dcp = 0.15 (0.15- 0.17); sctlp = 1.20 (1.10-1.20); C = 3.00 (2.84-3.00); 4c = 0.64 (0.63-0.68); 4v = 1.18 (1.15-1.25); 5x = 0.40 (0.40-0.47); ac = 5.00 (4.70-5.20); M = 0.15 (0.13-0.17); C3F = 1.00 (1.00).
 Etymology. – The specific name is in honor of Dr. Yaping Zhang of Kunming Institute of Zoology (KIZ).
 Distribution. – Malaysia (Borneo).
 Remarks. – This species has special type in paramere, it is easy to distinguish from the other members of the nigripennis species-group.
description: Published as part of Chen, Hong-wei & Wang, Bao-cheng, 2004, Stegana (Oxyphortica) Nigripennis Species-Group, With Descriptions Of Four New Species From Southeast Asia (Insecta: Diptera: Drosophilidae), pp. 29-36 in Raffles Bulletin of Zoology 52 (1) on pages 34-35, DOI: 10.5281/zenodo.4618889
Graphical Calculus on Representations of Quantum Lie Algebras
Creators: name: Kim, Dongseok
Publisher: name: arXiv
Year: 2003
Subjects: subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We develop graphical calculation methods. Jones-Wenzl projectors for U_q(sl(2,C)) are very powerful tools to find not only invariants of links but also invariants of 3-manifolds. We find single clasp expansions of generalized Jones-Wenzl projectors for simple Lie algebras of rank 2. Trihedron coefficients of the representation theory for U_q(sl(2,C)) has significant meaning and it is called 3j symbols. Using single clasp expansions for U_q(sl(3,C)), we find some trihedron coefficients of the representation theory of U_q(sl(3,C)). We study representation theory for U_q(sl(4,C)). We conjecture a complete set of relations for U_q(sl(4,C)).
description: Dissertation for degree awarded March, 2003 from UC Davis, 63 pages
Is there justification for levy expenditure on export promotion and market development in the agricultural sector in South Africa?
Creators: name: Lubinga, H. Moses
name: Mazibuko, Ndumiso
name: Ngqangweni, Simphiwe
name: Potelwa, Y. Xolisiwe
name: Nyhodo, Bonani
name: Lubinga, H. Moses
name: Mazibuko, Ndumiso
name: Ngqangweni, Simphiwe
name: Potelwa, Y. Xolisiwe
name: Nyhodo, Bonani
Publisher: name: Unknown
Year: 2017
Subjects: subject: Agribusiness
subject: Agricultural and Food Policy
subject: Crop Production/Industries
subject: Industrial Organization
subject: International Relations/Trade
subject: Marketing
subject: FOS: Economics and business
subject: Productivity Analysis
subject: Research Methods/ Statistical Methods
subject: Levy expenditure on export promotion
subject: Social welfare
subject: Citrus and deciduous fruits
subject: Table grapes
subject: Wine

description: South Africa’s industries in the agricultural sector spend some of the statutory levy income on export promotion and market development (EPMD) activities. Some industries argue that levy expenditure on EPMD activities generates satisfactory returns on investment but empirical evidence is yet to be presented to support the argument. Hence, this study fills this gap by building a unique dataset based on levy expenditure on EPMD for four industries (citrus, deciduous fruits, table grapes and wine) and using econometric analysis to assess the impact of EPMD on exports, net agricultural income and social welfare over a ten years’ period (2006- 2015). Furthermore, we estimate the returns generated on exports, agricultural net income and social welfare per Rand of levy expenditure on exports, net agricultural income and social welfare. In the analysis, we control for unobserved heterogeneity, multi-collinearity and reverse causality. Results suggest that levy expenditure on EPMD has a statistically significant positive impact on exports, net income and social welfare across all industries. On average, a unit increase in levy expenditure on EPMD leads to an increase in exports by 7.3 percent (table grapes and deciduous fruits), 5.6 percent (wine), 5.25 percent (citrus). For agricultural net income, a unit increase in levy expenditure on EPMD is on average associated with a 7.5 percent, 4.9 percent, 4.3 percent and 3.6 percent increase for table grapes, citrus, wine and deciduous fruits, respectively. Across all industries, the range of social welfare improvement lies between 0.2 percent and 0.4 percent per unit increase in levy expenditure on EPMD. Furthermore, results suggest that one Rand spent on EPMD for the four industries in question on average generates a R404 increase in exports, R39 of additional agricultural net income and a US$26 worth of improvement in social welfare. All in all, levy expenditure on EPMD plays a key role in fostering exports, agricultural net income and social welfare improvement. Policy wise, there is need for mobilisation of more resources to facilitate the EPMD initiative into new markets and products for the industries.
Quantum Stochastic Walk Models for Quantum State Discrimination
Creators: name: Pozza, Nicola Dalla
name: Caruso, Filippo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum Stochastic Walks (QSW) allow for a generalization of both quantum and classical random walks by describing the dynamic evolution of an open quantum system on a network, with nodes corresponding to quantum states of a fixed basis. We consider the problem of quantum state discrimination on such a system, and we solve it by optimizing the network topology weights. Finally, we test it on different quantum network topologies and compare it with optimal theoretical bounds.
Generalised discrete torsion and mirror symmetry for G_2 manifolds
Creators: name: Gaberdiel, Matthias R.
name: Kaste, Peter
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: A generalisation of discrete torsion is introduced in which different discrete torsion phases are considered for the different fixed points or twist fields of a twisted sector. The constraints that arise from modular invariance are analysed carefully. As an application we show how all the different resolutions of the T^7/Z_2^3 orbifold of Joyce have an interpretation in terms of such generalised discrete torsion orbifolds. Furthermore, we show that these manifolds are pairwise identified under G_2 mirror symmetry. From a conformal field theory point of view, this mirror symmetry arises from an automorphism of the extended chiral algebra of the G_2 compactification.
description: LaTeX, 25 pages, 1 figure; v2: one reference added and comment about higher loop modular invariance corrected, version to be published
title: Recovering normal: A qualitative study of grief following bereavement
Creators: name: Pearce, Caroline
Publisher: name: The Open University
Year: 2016

description: This thesis explores the notion of 'recovery' from grief following bereavement and answers the question, what happens when people 'fail' to recover? Researchers and practitioners promote a linear, staged, 'normal course' of grief, yet people who fail to follow this course are understood as experiencing 'complicated grief': a form of psychiatric disorder. In particular, the thesis explores the debates and issues around the highly contested notion of recovery from grief, drawing on an analysis of the theory and policy of grief and recovery, and empirical qualitative interview data from bereavement care practitioners and bereaved people in England. Arguing for the acknowledgment of the experience of 'non-recovery', this thesis draws on a Foucauldian approach to problematise the notion of recovery, highlighting how 'recovery' is a socially constructed notion linked to the individualised vision of health and happiness promoted by neoliberal governmentality. The study concentrates on three areas: the political and cultural factors that 'frame' grief and recovery in England; how grief is managed, through the example of bereavement counselling, and the ways in which bereaved people make sense of grief. The findings of this study present the experience of grief as one of navigating a 'liminal space'. Recovery from grief was achieved or resisted through the negotiation of a variety of political, medical and social discourses. These discourses provided guidelines for the bereaved person, where they were encouraged to make sense of grief, engage in certain practices and work towards the building of new identities, in order to recover from grief. Further, through the incorporation of 'non-recovery' this study proposes an alternative way of theorising grief, arguing for the need to emphasise the relational and embodied aspects of grief.
Nonlinear edge modes in a honeycomb electrical lattice near the Dirac points
Creators: name: Palmero, F.
name: English, L. Q.
name: Cuevas-Maraver, J.
name: Kevrekidis, P. G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We examine - both experimentally and numerically - a two-dimensional nonlinear driven electrical lattice with honeycomb structure. Drives are considered over a range of frequencies both outside (below and above) and inside the band of linear modes. We identify a number of discrete breathers both existing in the bulk and also (predominantly) ones arising at the domain boundaries, localized either along the arm-chair or along the zig-zag edges. The types of edge-localized breathers observed and computed emerge in distinct frequency bands near the Dirac-point frequency of the dispersion surface while driving the lattice subharmonically (in a spatially homogeneous manner). These observations/computations can represent a starting point towards the exploration of the interplay of nonlinearity and topology in an experimentally tractable system such as the honeycomb electrical lattice.
description: 7 pages, 9 figures