cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
LEVEL OF SOME HEAVY METALS AND PHYSICOCHEMICAL PARAMETERS IN SOIL SAMPLES FROM SHANI AND KWAYWKUSAR LOCAL GOVERNMENT AREAS, BORNO STATE, NIGERIA
Creators: name: Lawan Bukar, Inuwa
name: Zakari, Mohammed
name: Chellube, Zaynab Mohammad
name: Akan, Joseph Clement
Publisher: name: Journal of Scientific Research (JSR), University of Maiduguri, Department of Pure and Applied Chemistry
Year: 2024
Subjects: Heavy Metals; Kwayakusar; Shani; Physicochemical; Soil

description: ABSTRACT

Kwayakusar and Shani local government areas are known for intensive agricultural activities for both commercial and consumption purposes and use tones of agrochemicals for soil amendment to improve harvest. These agrochemicals and other sources introduces heavy metals in the soil, hence, the need to access the level of some heavy metals and physicochemical parameters changes in the soil. Atomic Absorption Spectrophotometer was used to determine the concentration of the heavy metals in the soil. Determinations of pH, conductivity, cation exchange capacity (CEC) organic carbon, organic matter, calcium, sodium and potassium were carried out using standard methods. The pH of the soil from the two local government area ranged from 5.74E+00 to 6.54E+00, while electrical conductivity varies from 1.90E+01 to 4.11E+02 µScm-1with the highest concentration being observed in the soil from Gashina agricultural location at Kwayakusar local government area. The levels of cation exchange capacity ranged from 8.09E+00 to 6.92E+01 C.mol/kg with the highest concentration also detected in Gashina agricultural location from Kwayakusar local government area. Organic carbon in the soil samples from the two local governments’ agricultural locations ranged from 5.09E-01 to 4.06E+00 %, while organic matter varies from 1.17E+00 to 7.10E+00 %. The maximum percentage of 4.06E+00 % organic carbon was observed in the Gashina agricultural location at Kwayakusar local government area, while the minimum percentage of 5.09E-01 % was observed in the soil from Lukundum agricultural location in Shani local government area. For organic matter, the maximum percentage of 7.00E+00 % was detected in the soil from Gashina agricultural location at Kwayakusar local government area, while the minimum percentage of 1.17E+00 % was observed in the soil from Lukundum agricultural location at Shani local government area. Calcium ranged from 4.60E+00 to 2.10E+01 Mg/Kg; for sodium, it ranged from 5.00E-02 to 3.30E-01 Mg/Kg; while potassium ranged from 1.50E-01 to 2.94 mg/kg.  The level of Ca, Na and K in the soil samples from the two Local Government agricultural locations increases with increase in depth.Thus,the concentrations of heavy metals in the soils samples obtained from the present study were higher than the FAO standard.

Keywords: Heavy Metals; Kwayakusar; Shani; Physicochemical; Soil
Orbispaces as differentiable stratified spaces
Creators: name: Crainic, Marius
name: Mestre, João Nuno
Publisher: name: arXiv
Year: 2017
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We present some features of the smooth structure, and of the canonical stratification on the orbit space of a proper Lie groupoid. One of the main features is that of Morita invariance of these structures - it allows us to talk about the canonical structure of differentiable stratified space on the orbispace (an object analogous to a separated stack in algebraic geometry) presented by the proper Lie groupoid. The canonical smooth structure on an orbispace is studied mainly via Spallek's framework of differentiable spaces, and two alternative frameworks are then presented. For the canonical stratification on an orbispace, we extend the similar theory coming from proper Lie group actions. We make no claim to originality. The goal of these notes is simply to give a complementary exposition to those available, and to clarify some subtle points where the literature can sometimes be confusing, even in the classical case of proper Lie group actions.
description: 49 pages. Final version to appear in Letters in Mathematical Physics. Changed title; corrected example 4.16
Dynamics of Dirac solitons in networks
Creators: name: Sabirov, K. K.
name: Babajanov, D. B.
name: Matrasulov, D. U.
name: Kevrekidis, P. G.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Pattern Formation and Solitons (nlin.PS)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study dynamics of Dirac solitons in prototypical networks modeling them by the nonlinear Dirac equation on metric graphs. Soliton solutions of the nonlinear Dirac equation on simple metric graphs are obtained. It is shown that these solutions provide reflectionless vertex transmission of the Dirac solitons under suitable conditions. The constraints for bond nonlinearity coefficients, allowing reflectionless transmission over a Y-junction are derived. The analytical results are confirmed by direct numerical simulations.
List colourings of multipartite hypergraphs
Creators: name: Méroueh, Arès
name: Thomason, Andrew
Publisher: name: arXiv
Year: 2017
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05C15

description: Let $χ_l(G)$ denote the list chromatic number of the $r$-uniform hypergraph~$G$. Extending a result of Alon for graphs, Saxton and the second author used the method of containers to prove that, if $G$ is simple and $d$-regular, then $χ_l(G)\ge (1/(r-1)+o(1))\log_r d$. To see how close this inequality is to best possible, we examine $χ_l(G)$ when $G$ is a random $r$-partite hypergraph with $n$ vertices in each class. The value when $r=2$ was determined by Alon and Krivelevich, here we show that $χ_l(G)= (g(r,α)+o(1))\log_r d$ almost surely, where $d$ is the expected average degree of~$G$ and $α=\log_nd$. The function $g(r,α)$ is defined in terms of "preference orders" and can be determined fairly explicitly. This is enough to show that the container method gives an optimal lower bound on $χ_l(G)$ for $r=2$ and $r=3$, but, perhaps surprisingly, apparently not for $r\ge4$.
description: Accepted version
Dynamical mechanism of atrial fibrillation: a topological approach
Creators: name: Marcotte, Christopher D
name: Grigoriev, Roman O
Publisher: name: arXiv
Year: 2017
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: FOS: Biological sciences

description: While spiral wave breakup has been implicated in the emergence of atrial fibrillation, its role in maintaining this complex type of cardiac arrhythmia is less clear. We used the Karma model of cardiac excitation to investigate the dynamical mechanisms that sustain atrial fibrillation once it has been established. The results of our numerical study show that spatiotemporally chaotic dynamics in this regime can be described as a dynamical equilibrium between topologically distinct types of transitions that increase or decrease the number of wavelets, in general agreement with the multiple wavelets hypothesis. Surprisingly, we found that the process of continuous excitation waves breaking up into discontinuous pieces plays no role whatsoever in maintaining spatiotemporal complexity. Instead this complexity is maintained as a dynamical balance between wave coalescence -- a unique, previously unidentified, topological process that increases the number of wavelets -- and wave collapse -- a different topological process that decreases their number.
description: 15 pages, 14 figures
INFECTIOUS BURSAL DISEASE (IBD): An Important Immunosuppressive Disease in Poultry
Creators: name: Mukani Kumari, Shikha Vishanoi, Dilip Singh Meena And Kartar Singh
Publisher: name: The Science world a Monthly e magazine
Year: 2024

description: Ø Infectious bursal disease is an acute, contagious, viral disease of young chickens characterized by diarrhea, vent picking, trembling, incoordination, inflammation followed by atrophy of the bursa of fabricius and by variable degrees of immunosuppression. The first cases were seen in area of Gumboro, United States of America, that why it is also known as “Gumboro disease”. IBD was first reported in Uttar Pradesh in India. Flocks are affected acutely and show variable morbidity (30%).
Jump Locations of Jump-Diffusion Processes with State-Dependent Rates
Creators: name: Miles, Christopher E.
name: Keener, James P.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Probability (math.PR)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We propose a general framework for studying jump-diffusion systems driven by both Gaussian noise and a jump process with state-dependent intensity. Of particular natural interest are the jump locations: the system evaluated at the jump times. However, the state-dependence of the jump rate provides direct coupling between the diffusion and jump components, making disentangling the two to study individually difficult. We provide an iterative map formulation of the sequence of distributions of jump locations. Computation of these distributions allows for the extraction of the interjump time statistics. These quantities reveal a relationship between the long-time distribution of jump location and the stationary density of the full process. We provide a few examples to demonstrate the analytical and numerical tools stemming from the results proposed in the paper, including an application that shows a non-monotonic dependence on the strength of diffusion.
description: final journal version
Gibbsian stationary non equilibrium states
Creators: name: De Carlo, Leonardo
name: Gabrielli, Davide
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the structure of stationary non equilibrium states for interacting particle systems from a microscopic viewpoint. In particular we discuss two different discrete geometric constructions. We apply both of them to determine non reversible transition rates corresponding to a fixed invariant measure. The first one uses the equivalence of this problem with the construction of divergence free flows on the transition graph. Since divergence free flows are characterized by cyclic decompositions we can generate families of models from elementary cycles on the configuration space. The second construction is a functional discrete Hodge decomposition for translational covariant discrete vector fields. According to this, for example, the instantaneous current of any interacting particle system on a finite torus can be canonically decomposed in a gradient part, a circulation term and an harmonic component. All the three components are associated to functions on the configuration space. This decomposition is unique and constructive. The stationary condition can be interpreted as an orthogonality condition with respect to an harmonic discrete vector field and we use this decomposition to construct models having a fixed invariant measure.
description: Some material added following the reports of the referees
Preliminary characterisation of the neuropeptide melanin concentrating hormone in humans
Creators: name: Naufahu, Jane
Publisher: name: University of Westminster
Year: 2010

description: Melanin concentrating hormone (MCH) is an orexigenic neuropeptide expressed centrally in the zona incerta and lateral hypothalamus. Evidence from rodent studies implicates hypothalamic MCH in the modulation of varied and diverse physiological functions most notably in energy homeostasis but also emerging as a candidate mediator in reproductive activities. These two aspects of normal physiology are intimately related though the pathways through which they integrate are only just being explored. Currently little is known about the actions, sources or targets of peripheral or circulating MCH. This study is the first to describe normal physiological concentrations of circulating MCH in humans. Particular emphasis has been devoted to aspects which might further understanding of the dual roles of circulating MCH in energy balance and reproductive function. A primary objective was to develop and validate a tool with which to quantifiably measure circulating MCH concentrations since previous work in this area has failed to reconcile this objective. Following the successful validation of a radioimmunoassay (RIA), three studies were undertaken with human subjects drawn from 3 distinct sample populations. The chief objectives were 1) to detect changes in circulating MCH post-prandial in association with other metabolic markers of energy homeostasis; 2) to determine associations between circulating MCH concentrations and resting metabolic rate (RMR); and 3) to detect changes in circulating MCH concentrations during the menstrual cycle. The results indicate that circulating MCH concentrations may be involved in glucose homeostasis since there were associations between the post-prandial MCH and the post-prandial insulin response. Circulating MCH may also convey information regarding the nutritional status of the individual, though this appears to be influenced by a combination of gender and adiposity status. Circulating MCH concentrations remained stable over the course of the menstrual cycle and were not strongly aligned to RMR. Whilst there were emergent patterns and trends there were also inconsistencies between the sample populations. This initial characterisation may be constructive for future exploration of the physiological relevance of circulating MCH in humans.
Rare radiative charm decays within the standard model and beyond
Creators: name: de Boer, Stefan
name: Hiller, Gudrun
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present standard model (SM) estimates for exclusive $c \to u γ$ processes in heavy quark and hybrid frameworks. Measured branching ratios ${\cal{B}}(D^0 \to (ϕ, \bar K^{*0}) γ)$ are at or somewhat exceeding the upper range of the SM and suggest slow convergence of the $1/m_D, α_s$-expansion. Model-independent constraints on $|ΔC|=|ΔU|=1$ dipole operators from ${\cal{B}}(D^0 \to ρ^0 γ)$ data are obtained. Predictions and implications for leptoquark models are worked out. While branching ratios are SM-like CP asymmetries $\lesssim 10 \%$ can be induced. In SUSY deviations from the SM can be even larger with CP asymmetries of $O(0.1)$. If $Λ_c$-baryons are produced polarized, such as at the $Z$-pole, an angular asymmetry in $Λ_c \to p γ$ decays can be studied that is sensitive to chirality-flipped contributions.
description: 23 pages plus references and appendices, 7 figures; v2: clarifications and references added, conclusions unchanged; v3: In section IV.B on leptoquark models matching corrected and subsequent text, tables and equations adapted. Phenomenological results and conclusions unchanged
Spin dependent inelastic collisions between metastable state two-electron atoms and ground state alkali-atoms
Creators: name: Schäfer, Florian
name: Konishi, Hideki
name: Bouscal, Adrien
name: Yagami, Tomoya
name: Takahashi, Yoshiro
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Experimentally the spin dependence of inelastic collisions between ytterbium (Yb) in the metastable 3P0 state and lithium (Li) in the Li ground state manifold is investigated at low magnetic fields. Using selective excitation all magnetic sublevels mJ of 174Yb(3P0) are accessed and four of the six lowest lying magnetic sublevels of 6Li are prepared by optical pumping. On the one hand, mJ-independence of collisions involving Li(F=1/2) atoms is found. A systematic mJ-dependence in collisions with Li(F=3/2) atoms, in particular suppressed losses for stretched collisional states, is observed on the other hand. Further, mJ-changing processes are found to be of minor relevance. The span of observed inelastic collision rates is between 1*10^{-11} cm^3/s and 40*10^{-11} cm^3/s, and a possible origin of the observed behavior is discussed.
description: 12 pages, 4 figures
The human right to medicines in sub-Saharan Africa
Creators: name: Niada, Laura
Publisher: name: University of Westminster
Year: 2010

description: The sub-Saharan African people experience the greatest burden of disease in the world although medicines exist that can treat the majority of the illnesses afflicting them. In fact, many essential medicines are not accessible for most of the people in the region. While the lack of resources is apparently a major impediment for access to medicines, man-made deliberations are also consequential, and can to some extent be influenced by regulation. The research question of this thesis therefore is: “can a human right to medicines be utilised to solve the problem of access to medicines in sub-Saharan Africa?”. In effect, in the last decade the notion of an international human right to medicines has started to develop in the human rights law and literature, prescribing that ultimately all individuals shall have access to medicines. This work contributes to the international human rights law doctrine by studying this area of the law, which is still largely uncharted. The thesis, furthermore, moves from a descriptive analysis of the law and undertakes a critical normative enquiry, underscoring the challenges of utilising human rights law to guide and redress access to medicines in sub-Saharan Africa. In effect, the contingencies of access to medicines within complex health systems make it practically difficult to identify the appropriate arrangement of access to medicines in a country. Moreover, policies and regulation for access to medicines can be morally questionable if conflicting with individuals’ legitimate rights, interests, needs and liberties. The relevance and merits of my arguments are grounded on different instances of critical-analytical research. I will use in particular interdisciplinary and empirical research on access to medicines, including a two-month field work in Tanzania, as well as the theoretical insights drawn from Luhmann’s social systems theory and Foucault’s theory of biopower. Therefore the thesis provides an ethical analysis of the potential operationalisation and implementation of the human right to medicines in sub-Saharan Africa. This analysis is also a case-study intervention to the debates concerning more generally health care, public health, development and human rights in the region. Moreover, the thesis contributes to socio-legal studies identifying the phenomena of autopoiesis, contingency, power and the limits of steering affecting human rights, law and politics.
Identification of Young Stellar Variables with KELT for K2 I: Campaign 13 Taurus Dippers and Rotators
Creators: name: Rodriguez, Joseph E.
name: Ansdell, Megan
name: Oelkers, Ryan J.
name: Cargile, Phillip A.
name: Gaidos, Eric
name: Cody, Ann Marie
name: Stevens, Daniel J.
name: Somers, Garrett
name: James, David
name: Beatty, Thomas G.
name: Siverd, Robert J.
name: Lund, Michael B.
name: Kuhn, Rudolf B.
name: Gaudi, B. Scott
name: Pepper, Joshua
name: Stassun, Keivan G.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: One of the most well-studied young stellar associations, Taurus-Auriga, will be observed by the extended Kepler mission, K2, in the spring of 2017. K2 Campaign 13 (C13) will be a unique opportunity to study many stars in this young association at high photometric precision and cadence. Using observations from the Kilodegree Extremely Little Telescope (KELT) survey, we identify "dippers", stochastic variables, and periodic variables among K2 C13 target stars. This release of the KELT data (lightcurve data in e-tables) provides the community with long-time baseline observations to assist in the understanding of the more exotic variables in the association. Transient-like phenomena on timescales of months to years are known characteristics in the light curves of young stellar objects, making contextual pre- and post-K2 observations critical to understanding their underlying processes. We are providing a comprehensive set of the KELT light curves for known Taurus-Auriga stars in K2 C13. The combined data sets from K2 and KELT should permit a broad array of investigations related to star formation, stellar variability, and protoplanetary environments.
description: 14 pages, 7 figure, 2 tables, Accepted for publication in ApJ, https://filtergraph.com/kelt_k2
A natural $ S_4 \times SO(10) $ model of flavour
Creators: name: Björkeroth, Fredrik
name: de Anda, Francisco J.
name: King, Stephen F.
name: Perdomo, Elena
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We propose a natural $ S_4 \times SO(10) $ supersymmetric grand unified theory of flavour with an auxiliary $\mathbb{Z}_4^2 \times \mathbb{Z}_4^R$ symmetry, based on small Higgs representations (nothing larger than an adjoint) and hence a type-I seesaw mechanism. The Yukawa structure of all fermions is determined by the hierarchical vacuum expectation values of three $ S_4 $ triplet flavons, with CSD3 vacuum alignments, where up-type quarks and neutrinos couple to one Higgs $\mathbf{10}$, and the down-type quarks and charged leptons couple to a second Higgs $\mathbf{10}$. The Yukawa matrices are obtained from sums of low-rank matrices, where each matrix in the sum naturally accounts for the mass of a particular family, as in sequential dominance in the neutrino sector, which predicts a normal neutrino mass hierarchy. The model accurately fits all available quark and lepton data, with predictions for the leptonic $CP$ phase in 95$\%$ credible intervals given by $ 281^\circ < δ^\ell < 308^\circ $ and $ 225^\circ < δ^\ell < 253^\circ $. The model reduces to the MSSM, with the two Higgs doublets emerging from the two Higgs $\mathbf{10}$s without mixing, and we demonstrate how a $μ$ term of $\mathcal{O}$(TeV) can be realised, as well as doublet-triplet splitting, with Planck scale operators controlled by symmetry, leading to acceptable proton decay.
description: 22 pages, 4 figures. Matches published version
Tradeoffs between microbial growth phases lead to frequency-dependent and non-transitive selection
Creators: name: Manhart, Michael
name: Adkar, Bharat V.
name: Shakhnovich, Eugene I.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: FOS: Biological sciences

description: Mutations in a microbial population can increase the frequency of a genotype not only by increasing its exponential growth rate, but also by decreasing its lag time or adjusting the yield (resource efficiency). The contribution of multiple life-history traits to selection is a critical question for evolutionary biology as we seek to predict the evolutionary fates of mutations. Here we use a model of microbial growth to show there are two distinct components of selection corresponding to the growth and lag phases, while the yield modulates their relative importance. The model predicts rich population dynamics when there are tradeoffs between phases: multiple strains can coexist or exhibit bistability due to frequency-dependent selection, and strains can engage in rock-paper-scissors interactions due to non-transitive selection. We characterize the environmental conditions and patterns of traits necessary to realize these phenomena, which we show to be readily accessible to experiments. Our results provide a theoretical framework for analyzing high-throughput measurements of microbial growth traits, especially interpreting the pleiotropy and correlations between traits across mutants. This work also highlights the need for more comprehensive measurements of selection in simple microbial systems, where the concept of an ordinary fitness landscape breaks down.
A study of activation antigens involved in the pathologicalmechanisms and pathways of cutaneous malignant disease withparticular emphasis on cutaneous T cell lymphoma andmalignant melanoma
Creators: name: Orchard, Guy
Publisher: name: University of Westminster
Year: 2010
Subjects: Cutaneous T cell lymphoma (CTCL), malignant melanoma (MM),immunocytochemistry (IMC)

description: The investigation of dermatological conditions embraces the concept of a clinicopathological correlation. The studies into cutaneous T cell lymphoma (CTCL) and malignant melanoma (MM), presented here involved predominantly immunocytochemical procedures and relate to the investigations into AP-1 protein expression in CTCL and melanocyte activation antigens in MM. Results: Findings indicate that expression of AP-1 proteins differs not only according to type of CTCL but also according to stages of tumour progression. In MM activation antigen expression varies with tumour metastasis. Consideration of the role of techniques in terms of sensitivity and specificity form a pivitol component in the evaluation of tumour antigen expression.
Flavour anomalies after the $R_{K^*}$ measurement
Creators: name: D'Amico, Guido
name: Nardecchia, Marco
name: Panci, Paolo
name: Sannino, Francesco
name: Strumia, Alessandro
name: Torre, Riccardo
name: Urbano, Alfredo
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The LHCb measurement of the $μ/e$ ratio $R_{K^*}$ indicates a deficit with respect to the Standard Model prediction, supporting earlier hints of lepton universality violation observed in the $R_K$ ratio. We show that the $R_K$ and $R_{K^*}$ ratios alone constrain the chiralities of the states contributing to these anomalies, and we find deviations from the Standard Model at the $4σ$ level. This conclusion is further corroborated by hints in the theoretically challenging $b\to sμ^+μ^-$ distributions. Theoretical interpretations in terms of $Z'$, lepto-quarks, loop mediators, and composite dynamics are discussed. We highlight their distinctive features in terms of chiralities and flavour structure relevant for the observed anomalies.
description: Updated including the Moriond 2019 data from LHCb and Belle. 37 pages, 11 figures
Regularity of anisotropic refinable functions
Creators: name: Charina, Maria
name: Protasov, Vladimir Yu.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65D17, 15A60, 39A99

description: This paper presents a detailed regularity analysis of anisotropic wavelet frames and subdivision. In the univariate setting, the smoothness of wavelet frames and subdivision is well understood by means of the matrix approach. In the multivariate setting, this approach has been extended only to the special case of isotropic refinement with the dilation matrix all of whose eigenvalues are equal in the absolute value. The general anisotropic case has resisted to be fully understood: the matrix approach can determine whether a refinable function belongs to $C(\mathbb{R}^s)$ or $L_p(\mathbb{R}^s)$, $1 \le p < \infty$, but its Hölder regularity remained mysteriously unattainable. It this paper we show how to compute the Hölder regularity in $C(\mathbb{R}^s)$ or $L_p(\mathbb{R}^s)$, $1 \le p < \infty$. In the anisotropic case, our expression for the exact Hölder exponent of a refinable function reflects the impact of the variable moduli of the eigenvalues of the corresponding dilation matrix. In the isotropic case, our results reduce to the well-known facts from the literature. We provide an efficient algorithm for determining the finite set of the restricted transition matrices whose spectral properties characterize the Hölder exponent of the corresponding refinable function. We also analyze the higher regularity, the local regularity, the corresponding moduli of continuity, and the rate of convergence of the corresponding subdivision schemes. We illustrate our results with several examples.
Retour de l'URSS, ou comment dure un livre d'actualité. Portrait de Gide en Pascal du XXe siècle
Creators: name: DZIUB, Nikol
name: VOEGELE, Augustin
Publisher: name: Zenodo
Year: 2024

description: Proposition de communication (sur invitation) pour le colloque  "Echos d’André Gide. Éditions, traductions, réception. De l’Œuvre et de ses relectures" (Mulhouse, 23-24 mai 2024)

 

Paper proposal (by invitation) for the conference " Echoes of André Gide. Editions, Translations, Reception. On the Work and its Rereadings" (Mulhouse, 23-24 May 2024)
A framework to assess the costs and benefits of advanced work packaging in industrial construction
Creators: Halala, Yonas Samuel
Fayek, Aminah Robinson
Publisher: name: University of Alberta Library
Year: 2019

The term advanced work packaging (AWP), coined by the Construction Industry Institute (CII), refers to a disciplined process for project planning and execution; it was developed to address challenges such as cost and schedule overruns in the industrial construction sector. Case studies conducted on AWP report a number of benefits in the areas of productivity, cost, safety, and schedule. However, since there is no clear method to assess the costs and benefits of AWP implementation, a significant challenge in AWP adoption is the lack of quantitative evidence to support these reported benefits. This paper presents a structured framework to assess multiple aspects of AWP implementation, which will enable the quantification of both its costs and benefits. The framework will enable the future comparison of AWP and non-AWP projects. This paper contributes to the industrial construction sector by providing a framework to assess AWP implementation in practice.
Open source Matrix Product States: Opening ways to simulate entangled many-body quantum systems in one dimension
Creators: name: Jaschke, Daniel
name: Wall, Michael L.
name: Carr, Lincoln D.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Numerical simulations are a powerful tool to study quantum systems beyond exactly solvable systems lacking an analytic expression. For one-dimensional entangled quantum systems, tensor network methods, amongst them Matrix Product States (MPSs), have attracted interest from different fields of quantum physics ranging from solid state systems to quantum simulators and quantum computing. Our open source MPS code provides the community with a toolset to analyze the statics and dynamics of one-dimensional quantum systems. Here, we present our open source library, Open Source Matrix Product States (OSMPS), of MPS methods implemented in Python and Fortran2003. The library includes tools for ground state calculation and excited states via the variational ansatz. We also support ground states for infinite systems with translational invariance. Dynamics are simulated with different algorithms, including three algorithms with support for long-range interactions. Convenient features include built-in support for fermionic systems and number conservation with rotational $\mathcal{U}(1)$ and discrete $\mathbb{Z}_2$ symmetries for finite systems, as well as data parallelism with MPI. We explain the principles and techniques used in this library along with examples of how to efficiently use the general interfaces to analyze the Ising and Bose-Hubbard models. This description includes the preparation of simulations as well as dispatching and post-processing of them.
Hypergeometric Euler numbers
Creators: name: Komatsu, Takao
name: Zhu, Huilin
Publisher: name: arXiv
Year: 2016
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11B68, 11B37, 11C20, 15A15, 33C20

description: In this paper, we introduce the hypergeometric Euler number as an analogue of the hypergeometric Bernoulli number and the hypergeometric Cauchy number. We study several expressions and sums of products of hypergeometric Euler numbers. We also introduce complementary hypergeometric Euler numbers and give some characteristic properties. There are strong reasons why these hypergeometric numbers are important. The hypergeometric numbers have one of the advantages that yield the natural extensions of determinant expressions of the numbers, though many kinds of generalizations of the Euler numbers have been considered by many authors.
Asymptotic convergence in distribution of the area bounded by prevalence-weighted Kaplan-Meier curves using empirical process modeling
Creators: name: Heuser, Aaron
name: Huynh, Minh
name: Chang, Joshua C.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Methodology (stat.ME)
subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The Kaplan-Meier product-limit estimator is a simple and powerful tool in time to event analysis. An extension exists for populations stratified into cohorts where a population survival curve is generated by weighted averaging of cohort-level survival curves. For making population-level comparisons using this statistic, we analyze the statistics of the area between two such weighted survival curves. We derive the large sample behavior of this statistic based on an empirical process of product-limit estimators. This estimator was used by an interdisciplinary NIH-SSA team in the identification of medical conditions to prioritize for adjudication in disability benefits processing.
description: Major revision in review by RSOS. Includes fixes to Theorem 1 as well as numerical results
BPS Alice strings
Creators: name: Chatterjee, Chandrasekhar
name: Nitta, Muneto
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: When a charged particle encircles around an Alice string, it changes the sign of the electric charge. In this paper we find a BPS-saturated Alice string in $U(1)\times SO(3)$ gauge theory with charged complex scalar fields belonging to the vector representation. After performing BPS completion we solve the BPS equations numerically. We further embed the Alice string into an ${\cal N}=1$ supersymmetric gauge theory to show that it is half BPS.
description: 15 pages, 4 figures, minor typographical changes, references added
Charging Constrained Electric Vehicle Routing Problem with Prioritized Customers
Creators: name: Krishnan, Advaith
Publisher: name: Lancaster University
Year: 2023
Subjects: Electric Vehicles (EVs)
Mathematical Optimisation
Simulated Annealing
Variable Neighborhood Search
vehicle routing problem
prioritisation
Fleet Planning
electric vehicle charger

description: This thesis proposes a unique Vehicle Routing Problem (VRP) focusing on charging management optimisations for electric vehicles with prioritised customers. This problem is modelled as a hybrid of the Travelling Repairman Problem (TRP) and the Electric Vehicle Routing Problem (EVRP). After a brief literature review around the scope of the problem, a base mathematical model is formulated to explain the constraints and objective function of the problem. The problem is solved using a Nearest Neighbour Based Heuristic (NNBH) and Simulated Annealing with Variable Neighbourhood Search. The Nearest Neighbour Based Heuristic (NNBH) generates an initial solution. The initial solution is used by the metaheuristic for achieving a better final solution. The base mathematical model is used to benchmark the performance of the solution approach. The algorithmic framework developed is run for smaller and larger instances to demonstrate the accuracy and scalability of the model produced, respectively. The computational results of both instances show the success of the proposed model.
A Conforming Primal-Dual Mixed Formulation for the 2D Multiscale Porous Media Flow Problem
Creators: name: Morales, Fernando A
Publisher: name: arXiv
Year: 2017
Subjects: subject: Numerical Analysis (math.NA)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 65M60, 35J50, 65N12

description: In this paper a new primal-dual mixed finite element method is introduced, aimed to model multiscale problems with several geometric subregions in the domain of interest. In each of these regions porous media fluid flow takes place, but governed by physical parameters at a different scale; additionally, a fluid exchange through contact interfaces occurs between neighboring regions. The well-posedness of the primal-dual mixed finite element formulation on bounded simply connected polygonal domains of the plane is presented. Next, the convergence of the discrete solution to the exact solution of the problem is discussed, together with the convergence rate analysis. Finally, the numerical examples illustrate the method's capabilities to handle multiscale problems and interface discontinuities as well as experimental rates of convergence.
description: 29 pages, 22 figures
Achievable Information Rates for Coded Modulation with Hard Decision Decoding for Coherent Fiber-Optic Systems
Creators: name: Sheikh, Alireza
name: Amat, Alexandre Graell i
name: Liva, Gianluigi
Publisher: name: arXiv
Year: 2017
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We analyze the achievable information rates (AIRs) for coded modulation schemes with QAM constellations with both bit-wise and symbol-wise decoders, corresponding to the case where a binary code is used in combination with a higher-order modulation using the bit-interleaved coded modulation (BICM) paradigm and to the case where a nonbinary code over a field matched to the constellation size is used, respectively. In particular, we consider hard decision decoding, which is the preferable option for fiber-optic communication systems where decoding complexity is a concern. Recently, Liga \emph{et al.} analyzed the AIRs for bit-wise and symbol-wise decoders considering what the authors called \emph{hard decision decoder} which, however, exploits \emph{soft information} of the transition probabilities of discrete-input discrete-output channel resulting from the hard detection. As such, the complexity of the decoder is essentially the same as the complexity of a soft decision decoder. In this paper, we analyze instead the AIRs for the standard hard decision decoder, commonly used in practice, where the decoding is based on the Hamming distance metric. We show that if standard hard decision decoding is used, bit-wise decoders yield significantly higher AIRs than symbol-wise decoders. As a result, contrary to the conclusion by Liga \emph{et al.}, binary decoders together with the BICM paradigm are preferable for spectrally-efficient fiber-optic systems. We also design binary and nonbinary staircase codes and show that, in agreement with the AIRs, binary codes yield better performance.
description: Published in IEEE/OSA Journal of Lightwave Technology, 2017
Nature of the spiral state, electric polarisation and magnetic transitions in Sr-doped YBaCuFeO$_5$: A first-principles study
Creators: name: Dey, Dibyendu
name: Nandy, S.
name: Maitra, T.
name: Yadav, C. S.
name: Taraphder, A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Contradictory results on the ferroelectric response of type II multiferroic YBaCuFeO$_{5}$, in its incommensurate phase, has of late, opened up a lively debate. There are ambiguous reports on the nature of the spiral magnetic state. Using first-principles DFT calculations for the parent compound within LSDA+U+SO approximation, the multiferroic response and the nature of spiral state is revealed. The helical spiral is found to be more stable below the transition temperature as spins prefer to lie in ab plane. The Dzyaloshinskii-Moriya (DM) interaction and the spin current mechanism were earlier invoked to account for the electric polarisation in this system. However, the DM interaction is found to be absent, spin current mechanism is not valid in the helical spiral state and there is no electric polarisation thereof. These results are in good agreement with the recent single-crystal data. We also investigate the magnetic transitions in YBa$_{1-x}$Sr$_x$CuFeO$_5$ for the entire range $0\le x\le 1$ of doping. The exchange interactions are estimated as a function of doping and a quantum Monte Carlo (QMC) calculation on an effective spin Hamiltonian shows that the paramagnetic to commensurate phase transition temperature increases with doping till $x=0.5$ and decreases beyond. Our observations are consistent with experimental findings.
description: 8 pages, 7 figures
The computational landscape of general physical theories
Creators: name: Barrett, Jonathan
name: de Beaudrap, Niel
name: Hoban, Matty J.
name: Lee, Ciarán M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Physics (quant-ph)
subject: Computational Complexity (cs.CC)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: There is good evidence that quantum computers are more powerful than classical computers, and that various simple modifications of quantum theory yield computational power that is dramatically greater still. However, these modifications also violate fundamental physical principles. This raises the question of whether there exists a physical theory, allowing computation more powerful than quantum, but which still respects those fundamental physical principles. Prior work by two of us introduced this question within a suitable framework for theories that make good operational sense, and showed that in any theory satisfying tomographic locality, the class of problems that can be solved efficiently is contained in the complexity class AWPP. Here, we show that this bound is tight, in the sense that there exists a theory, satisfying tomographic locality, as well as a basic principle of causality, which can efficiently decide everything in AWPP. Hence this theory can efficiently simulate any computation in this framework, including quantum computation.
description: 15 pages, 5 figures. Close to published version. Comments welcome
Health professions student experiences with interpreter services: a scoping review protocol
Creators: name: Wolfe, Heather
Publisher: name: My University
Year: 2024
Subjects: subject: Health Professions Education, Interpreter, Translator, Review Article
subject: Medicine (General)
subject: Health Sciences

description: Limited English Proficiency (LEP) is increasingly common in the US and it is known that LEP patients face barriers including lower rates of access to care and poorer quality care. The use of professional interpreters or bilingual health providers has been shown to improve care and patient satisfaction and is legally required. Despite this, correct and consistent use of interpreter services by medical staff has been shown to be low even in the setting of knowledge regarding the importance. Health professions curricula have evolved to meet demands of excellent care across all domains including cultural competency. It is important to identify whether health professions students around the globe are being taught and experiencing interpreter service use in a meaningful way while in training. The objective of this study is to investigate and describe the experience with interpreter services that health professions students have as well as to identify gaps and potential future study. A scoping review will be conducted in order to collect all emerging data and not limit the review to primary research only.
Spin Resonance and Magnetic Order in an Unconventional Superconductor
Creators: name: Mazzone, D. G.
name: Raymond, S.
name: Gavilano, J. L.
name: Steffens, P.
name: Schneidewind, A.
name: Lapertot, G.
name: Kenzelmann, M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Unconventional superconductivity in many materials is believed to be mediated by magnetic fluctuations. It is an open question how magnetic order can emerge from a superconducting condensate and how it competes with the magnetic spin resonance in unconventional superconductors. Here we study a model d-wave superconductor that develops spin-density wave order, and find that the spin resonance is unaffected by the onset of static magnetic order. This result suggests a scenario, in which the resonance in Nd0.05Ce0.95CoIn5 is a longitudinal mode with fluctuating moments along the ordered magnetic moments.
Structural Resolution with Co-inductive Loop Detection
Creators: name: Li, Yue
Publisher: name: arXiv
Year: 2017
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences

description: A way to combine co-SLD style loop detection with structural resolution was found and is introduced in this work, to extend structural resolution with co-induction. In particular, we present the operational semantics, called co-inductive structural resolution, of this novel combination and prove its soundness with respect to the greatest complete Herbrand model.
description: In Proceedings CoALP-Ty'16, arXiv:1709.04199
Constructing country-specific quality-of-life item banks for adults with amblyopia and strabismus in Australia and India
Creators: name: Kumaran, Sheela Evangeline
name: Khadka, Jyoti
name: Rakshit, Archayeeta
name: Hussaindeen, Jameel R
name: Pesudovs, Konrad
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Medicine
subject: Sociology
subject: FOS: Sociology
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Science Policy

description: Understanding the quality-of-life (QoL) impacts of amblyopia and strabismus from the perspectives of patients using validated tools would enable eye care practitioners to provide better clinical management. Item banks are advanced patient reported outcome measures with several advantages over traditional QoL assessment. This paper describes the development of amblyopia and strabismus-specific QoL item banks for two distinct country settings: Australia (high-income) and India (low-middle income) and examines the unique QoL issues. Using a bottom-up systematic approach, the content for the item banks was identified from three sources: existing self-report amblyopia and strabismus questionnaires (n = 22), qualitative literature (n = 5) and prospective qualitative studies in Australia (n = 49) and India (n = 30). The initial item pool underwent item evaluation, construction, and pre-testing to form optimal sets of representative items. The Indian item pools were first developed in English and translated into Hindi and Tamil using a rigorous translation protocol. The differences in QoL experiences that emanated from the qualitative studies and the number of common and unique items in the final item pools were compared. The final Australian and Indian item pools comprised 312 and 277 items, respectively, covering 11 QoL domains. Two hundred and sixty items (79%) were common to both countries, and 21% were unique. Of the 11 domains, except for activity limitation (64.5%), visual symptoms (73.3%) and emotional impact (75.5%) domains, all other domains had over 80% of items common to both countries. The unique items can be attributed to differences in QoL experiences, individual perspectives, culture, lifestyle, country setting and health systems. Amblyopia has a multifaceted impact on QoL irrespective of the country settings. Despite a huge overlap in QoL impacts between Australia and India, both countries had unique issues, especially activity limitations. The study developed comprehensive, country-specific item pools for Australia and India.