cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Comportement d’enduits à porosité contrôlée vis-à-vis de l’attaque au sel
Creators: name: Belayachi, Naima
name: Beck, Kévin
name: Sghaier, Cyrine
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: Cette étude s’intéresse au comportement face à l’attaque au sel de deux enduits à base de chaux destinés à protéger des isolants biosourcés pour une isolation par extérieur dans le cadre d’une réhabilitation énergétique de bâtiments. Deux adjuvants (ostapur et poudre d’aluminium) sont proposés pour créer et contrôler la porosité et permettant de confectionner des enduits respectant les critères d’un enduit isolant. Une étude de rhéologie a été réalisée pour déterminer le protocole de mélange et les rapports eau/chaux pour prendre en compte l’effet très différent des deux additifs sur les mortiers à l’état frais. A l’état durci, les porosités des enduits sont très proches, avec davantage de macropores pour l’ostapur comparé à la poudre d’aluminium. Les enduits montrent une porosité plus élevée pour un pourcentage élevé d’additif. Lors du test de résistance à la cristallisation des sels (EN 12370), les enduits avec un ajout faible d’ostapur ou d’aluminium sont plus résistants que ceux avec l’ajout le plus élevé de l’étude (1%), et ont un comportement similaire au mortier témoin.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
Additional file 1 of The potential for computational IT tools in disaster relief and shelter design
Creators: name: Noorullah Kuchai
name: Shepherd, Paul
name: Calabria-Holley, Juliana
name: Copping, Alexander
name: Matard, Aude
name: Coley, David
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Molecular Biology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences

description: Additional file 1. Appendices.
Electronic Structure of ZnCNi3
Creators: name: Johannes, M. D.
name: Pickett, W. E.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: According to a recent report by Park et al, ZnCNi3 is isostructural and isovalent to the superconducting (Tc = 8 K) anti-perovskite, MgCNi3, but shows no indication of a superconducting transition down to 2K. A comparison of calculated electronic structures shows that the main features of MgCNi3, particularly the van Hove singularity near the Fermi energy, are preserved in ZnCNi3. Thus the reported lack of superconductivity in ZnCNi3 is not explainable in terms of Tc being driven to a very low value by a small Fermi level density of states. We propose that the lack of superconductivity, the small value of the linear specific heat coefficient, gamma, and the discrepancy between theoretical and experimental lattice constants can all be explained if the material is assumed to be a C-deficient alpha-ZnCNi3 similar to the analogous non-superconducting phase of MgCNi3.
An Investigation Into the Use of Neoprene (A Red Listed Material) for Soundproofing
Creators: name: Brummet, Colten
name: Raju, Neetha Rose
Publisher: name: The University of British Columbia
Year: 2011

description: 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.”
Inter-numerology Interference Management with Adaptive Guards: A Cross-layer Approach
Creators: name: Demir, Ali Fatih
name: Arslan, Huseyin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The next-generation communication technologies are evolving towards increased flexibility in various aspects. Although orthogonal frequency division multiplexing (OFDM) remains as the waveform of the upcoming fifth-generation (5G) standard, the new radio provides flexibility in waveform parametrization (a.k.a. numerology) to address diverse requirements. However, managing the peaceful coexistence of mixed numerologies is challenging due to inter-numerology interference (INI). This paper proposes the utilization of adaptive guards in both time and frequency domains as a solution along with a multi-window operation in the physical (PHY) layer. The adaptive windowing operation needs a guard duration to reduce the unwanted emissions, and a guard band is required to handle the INI level on the adjacent band. The guards in both domains are jointly optimized with respect to the subcarrier spacing, use case (i.e., service requirement), and power offset between the numerologies. Also, the multi-window approach provides managing each side of the spectrum independently in case of an asymmetric interference scenario. Since the allowed interference level depends on the numerologies operating in the adjacent bands, the potential of adaptive guards is further increased and exploited with a medium access control (MAC) layer scheduling technique. The proposed INI-based scheduling algorithm decreases the need for guards by allocating the numerologies to the available bands, considering their subcarrier spacing, power level, and SIR requirements. Therefore, INI management is performed with a cross-layer (PHY and MAC) approach in this study. The results show that the precise design that accommodates such flexibility reduces the guards significantly and improves the spectral efficiency of mixed numerology systems.
description: 9 pages, 9 figures, 5 tables, accepted version, (The URL for the final version: https://ieeexplore.ieee.org/document/8986659)
Additional file 3 of Prevalence of neonatal hypothermia and its associated factors in East Africa: a systematic review and meta-analysis
Creators: name: Biruk Beletew
name: Ayelign Mengesha
name: Mesfin Wudu
name: Melese Abate
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: Additional file 3: Table S3. Adjusted confounders and main findings extracted from included studies in East Africa, from January 2000–December 2019.
Towards universal magnetization curves in the superconducting state of RuSr2GdCu2O8
Creators: name: Papageorgiou, Thomas P.
name: Braun, Hans F.
name: Goerlach, Tobias
name: Uhlarz, Marc
name: Loehneysen, Hilbert v.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Whereas resistivity and ac susceptibility measurements on the magnetic (Tm ~ 130 K) superconductor (Tc,onset ~ 50 K) RuSr2GdCu2O8 (Ru-1212Gd) reported by different research groups reveal a universal behavior in its superconducting state, this is not the case with the superconducting quantum interference device (SQUID) magnetization measurements. The reported SQUID measurements in the superconducting state of Ru-1212Gd reveal a variety of behaviors, leaving the question of bulk superconductivity for this compound open. We review several of the reported behaviors by presenting measurements done on our samples belonging to the same batch. Based on the observed sensitivity of Ru-1212Gd to magnetic field inhomogeneities when it is moved in the superconducting magnet of the SQUID magnetometer during the measurements, we suggest that the reported different behaviors can be the result of different field profiles in the superconducting magnet and not of different superconducting properties. In order to avoid the artifacts arising from moving the sample in an inhomogeneous field, we did measurements on a stationary Ru-1212Gd sample employing a home made SQUID magnetometer. The measured curves showed none of the suspicious ``symptoms'' present in the curves measured with a magnetometer employing sample movement (e.g. no reversal of the features observed in the superconducting state of Ru-1212Gd by a field reversal) and if verified by measurements on stationary samples by other groups a universal behavior in the superconducting state of Ru-1212Gd can be revealed by the SQUID measurements too. Our considerations support the existence of bulk superconductivity for Ru-1212Gd.
description: 21 pages, 9 figures
Bio-mimetic Adaptive Force/Position Control Using Fractal Impedance
Creators: name: Tiseo, Carlo
name: Merkt, Wolfgang
name: Babarahmati, Keyhan Kouhkiloui
name: Wolfslag, Wouter
name: Vijayakumar, Sethu
name: Mistry, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: The ability of animals to interact with complex dynamics is unmatched in robots. Especially important to the interaction performances is the online adaptation of body dynamics, which can be modeled as an impedance behaviour. However, the variable impedance controller still possesses a challenge in the current control frameworks due to the difficulties of retaining stability when adapting the controller gains. The fractal impedance controller has been recently proposed to solve this issue. However, it still has limitations such as sudden jumps in force when it starts to converge to the desired position and the lack of a force feedback loop. In this manuscript, two improvements are made to the control framework to solve these limitations. The force discontinuity has been addressed introducing a modulation of the impedance via a virtual antagonist that modulates the output force. The force tracking has been modeled after the parallel force/position controller architecture. In contrast to traditional methods, the fractal impedance controller enables the implementation of a search algorithm on the force feedback to adapt its behaviour on the external environment instead of on relying on \textit{a priori} knowledge of the external dynamics. Preliminary simulation results presented in this paper show the feasibility of the proposed approach, and it allows to evaluate the trade-off that needs to be made when relying on the proposed controller for interaction. In conclusion, the proposed method mimics the behaviour of an agonist/antagonist system adapting to unknown external dynamics, and it may find application in computational neuroscience, haptics, and interaction control.
description: \c{opyright} 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works
Candidate Entry, Screening, and the Political Budget Cycle
Creators: name: Le Borgne, Eric
name: Lockwood, Ben
name: Le Borgne, Eric
name: Lockwood, Ben
Publisher: name: Unknown
Year: 2001
Subjects: subject: Political Economy
subject: Public Economics
subject: Asymmetric Information
subject: Citizen-Candidate
subject: Representative Democracy
subject: Signaling Games
subject: Political Budget Cycles

description: We investigate whether relevant private information about citizens’ competence in political office can be credibly revealed by their entry and campaign expenditure decisions, as opposed to choice of policy once in office. We find that this depends on whether voters and candidates have common or conflicting interests; only in the former case can entry be revealing in equilibrium. We apply these results to Rogoff’s (1990) model of the political budget cycle, allowing for candidate entry, as well as elections: as interests are common, low-ability candidates are screened out at the entry stage, and so there is no signaling via fiscal policy (i.e. no “political budget cycle”). In a variant of the Rogoff model where citizens differ in honesty, rather than ability, interests are conflicting, and so the political budget cycle can persist in equilibrium.
Hopf algebra structures in particle physics
Creators: name: Weinzierl, Stefan
Publisher: name: arXiv
Year: 2003
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In the recent years, Hopf algebras have been introduced to describe certain combinatorial properties of quantum field theories. I will give a basic introduction to these algebras and review some occurrences in particle physics.
description: 6 pages, talk given at the EPS conference, Aachen, 2003
Additional file 2 of Prevalence of neonatal hypothermia and its associated factors in East Africa: a systematic review and meta-analysis
Creators: name: Biruk Beletew
name: Ayelign Mengesha
name: Mesfin Wudu
name: Melese Abate
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Cancer
subject: Science Policy
subject: Computational Biology

description: Additional file 2: Table S2. Quality appraisal result of included studies in East Africa, from January 2000–December 2019.; Using Joanna Briggs Institute (JBI) quality appraisal checklist [16].
VOTING POWER IN THE GOVERNANCE OF THE INTERNATIONAL MONETARY FUND
Creators: name: Leech, Dennis
name: Leech, Dennis
Publisher: name: Unknown
Year: 2002
Subjects: Financial Economics
Political Economy

description: This paper examines how the rules of the IMF and their implementation affect the voting power of its member countries and its capacity to make decisions, and makes recommendations for changes. Fundamental decision making at the IMF uses a system of weighted voting in which member countries and executive directors cast different numbers of votes reflecting their respective financial contributions. It is well known that a property of such weighted voting systems (other examples are the EU Council of Ministers, shareholders' meetings in joint stock companies) is that a member’s power - in the sense of its general ability to influence decisions - is not the same as its share of the votes. The system is designed to give power unequally to different members but its implementation might result in too much or too little inequality. The most important decisions require special majorities of 85% of the votes, giving the USA - with over 17 percent - an effective veto. This very high majority requirement has been criticised as both likely to make the decision making system too rigid and also to be damaging to American sovereignty by making it easier for others to block US proposals. When the Bretton Woods system was being planned in 1943, John Maynard Keynes warned of this. This paper uses game-theoretic measures of voting power to answer the following questions: 1. Is the inequality of voting power between countries a fair reflection of the differences in their respective contributions? 2. How does the size of the majority requirement employed affect the voting powers of the main contributors and the effectiveness of the IMF in being able to make decisions by majority voting? 3. How should the votes be weighted to give each country a given share of the power to influence decisions in general? The findings, using the voting weights for 1999, are that: (1) Countries' voting powers over ordinary decisions are much more unequal than their financial contributions; the power of the USA is much greater than its nominal 17% of the votes. (2) The effect of the special 85% majority requirement for major decisions is to severely limit the effectiveness of the decision-making system. (3) The use of the 85% majority requirement is counterproductive to the US pursuing an active role in the IMF by limiting its power to have its policies accepted. (4) The IMF should make all decisions by simple majority and scrap special majorities. That would make its democratic decision making system most effective. (5) The United States should support the use of simple majorities for all decisions if it wishes to increase its influence within a democratic IMF. (6) Votes of all members and executive directors should be reweighted in order to give the desired share of voting power to each country and director.
title: Osteoporosis and bone fracture in dialysis
title: Ostéoporose et fracture osseuse chez les dialysés.
Creators: name: Najlae El Ouardi
Publisher: name: Revue Marocaine de Rhumatologie (RMR)
Year: 2021
Subjects: Ostéoporose; Fracture osseuse; Dialysés.

description: Dialysis patients have an increased risk of bone fragility and fractures, with substantial morbidity and mortality. . The etiology of bone fragility is multifactorial. Mineral, bone and hormonal disorders could explain this high risk of fracture. Tools used for osteoporosis diagnosis and monitoring, like measuring bone mineral density by DXA, FRAX or TBS, are sometimes difficult to apply to dialysis patients. Biological markers are essential to categorize the bone loss of the dialysis patients. There is no therapeutic strategy to prevent the fracture risk in dialysis patients. Indeed, the evidence on the efficacy of antiosteoporotic treatments to reduce fracture is limited. This review outlines available evidence on risk factors of bone fragility in dialysis patients and the diagnostic and therapeutic tools currently available to reduce fracture risk.
description: Les dialysés ont un risque accru de fragilité et de fracture osseuse, ce qui contribue à l’augmentation du taux de la morbi-mortalité. L’étiologie de cette fragilité osseuse est multifactorielle. Les troubles minéraux, osseux et hormonaux pourraient expliquer ce risque élevé de fracture. Les outils utilisés pour le diagnostic et la surveillance de l’ostéoporose sont parfois difficilement applicables aux patients dialysés. C’est le cas de la mesure de la densité minérale osseuse par DXA, FRAX ou TBS. L’intérêt du bilan biologique est capital pour catégoriser la perte osseuse du dialysé. Il n’existe pas de stratégie thérapeutique pour prévenir le risque de fracture chez les dialysés. En effet, les preuves sur l’efficacité des traitements anti ostéoporotiques sont limitées. Cette mise au point donne un aperçu sur les facteurs de risque de fragilité osseuse chez les dialysés et les outils diagnostiques et thérapeutiques actuellement disponibles pour réduire le risque de fracture.
Programmable two-qubit gates in capacitively coupled flopping-mode spin qubits
Creators: name: Cayao, Jorge
name: Benito, Mónica
name: Burkard, Guido
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recent achievements in the field of gate defined semiconductor quantum dots reinforce the concept of a spin-based quantum computer consisting of nodes of locally connected qubits which communicate with each other via superconducting circuit resonator photons. In this work we theoretically demonstrate a versatile set of quantum gates between adjacent spin qubits defined in semiconductor quantum dots situated within the same node of such a spin-based quantum computer. The electric dipole acquired by the spin of an electron that moves across a double quantum dot potential in a magnetic field gradient has enabled strong coupling to resonator photons and low-power spin control. Here we show that this flopping-mode spin qubit also provides with the tunability to program multiple two-qubit gates. Since the capacitive coupling between these qubits brings about additional dephasing, we calculate the estimated infidelity of different two-qubit gates in the most immediate possible experimental realizations.
description: 6 pages, 5 figures + 3 pages of supplemental material
Crymostygius Kristjánsson & Svavarsson 2004, gen. nov.
Creators: name: Kristjánsson, B. K.
name: Svavarsson, J.
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Crymostygidae
Crymostygius

description: Crymostygius gen. nov.
 Diagnosis. As for the family.
 Type species. Crymostygius thingvallensis new species, by monotypy.
description: Published as part of Kristjánsson, B. K. & Svavarsson, J., 2004, Crymostygidae, a new family of subterranean freshwater gammaridean amphipods (Crustacea) recorded from subarctic Europe, pp. 1881-1894 in Journal of Natural History 38 (15) on page 1883, DOI: 10.1080/00222930310001597295, http://zenodo.org/record/4658689
Characterization of bipartite states using a single homodyne detector
Creators: name: D'Auria, Virginia
name: Porzio, Alberto
name: Solimeno, Salvatore
name: Olivares, Stefano
name: Paris, Matteo G. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We suggest a scheme to reconstruct the covariance matrix of a two-mode state using a single homodyne detector plus a polarizing beam splitter and a polarization rotator. It can be used to fully characterize bipartite Gaussian states and to extract relevant informations on generic states.
description: 7 pages, 1 figure
Spin-boson models for quantum decoherence of electronic excitations of biomolecules and quantum dots in a solvent
Creators: name: Gilmore, Joel
name: McKenzie, Ross H.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: Biomolecules (q-bio.BM)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: We give a theoretical treatment of the interaction of electronic excitations (excitons) in biomolecules and quantum dots with the surrounding polar solvent. Significant quantum decoherence occurs due to the interaction of the electric dipole moment of the solute with the fluctuating electric dipole moments of the individual molecules in the solvent. We introduce spin boson models which could be used to describe the effects of decoherence on the quantum dynamics of biomolecules which undergo light-induced conformational change and on biomolecules or quantum dots which are coupled by Forster resonant energy transfer.
description: More extended version, to appear in Journal of Physics: Condensed Matter. 13 pages, 3 figures
Boltzmann's $H$-theorem, entropy and the strength of gravity in theories with a nonminimal coupling between matter and geometry
Creators: name: Avelino, P. P.
name: Azevedo, R. P. L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we demonstrate that Boltzmann's $H$-theorem does not necessarily hold in the context of theories of gravity with nonminimally coupled matter fields. We find sufficient conditions for the violation of Boltzmann's $H$-theorem and derive an expression for the evolution of Boltzmann's $H$ in terms of the nonminimal coupling function, valid in the case of a collisionless gas in a homogeneous and isotropic Friedmann-Lemaître-Robertson-Walker universe. We highlight the implications of this result for the evolution of the entropy of the matter fields, briefly discussing the role played by collisions between particles whenever they are relevant. We also suggest a possible link between the high entropy of the Universe and the weakness of gravity in the context of these theories.
description: 7 pages, no figures. Clarifications added, typos corrected. Results unchanged
Does the Choice of University Matter? A Study of the Differences across UK Universities in Life Sciences Students’ Degree Performance
Creators: name: Bratti, Massimiliano
name: Bratti, Massimiliano
Publisher: name: Unknown
Year: 2001
Subjects: subject: Public Economics
subject: Teaching/Communication/Extension/Profession
subject: educational economics
subject: input-output analysis
subject: ordered probit
subject: performance indicators
subject: value-added

description: This paper investigates differences across UK universities in 1993 life sciences students’ degree performance using individuallevel data from the Universities’ Statistical Record (USR). Differences across universities are analysed by specifying and estimating a subject-specific educational production function. Even after including a wide range of controls for the quality of students, significant differences emerge across universities in students’ degree performance. We apply a two-stage estimation procedure and find evidence that a large part of ‘university effects’ cannot be explained by the kind of institutional inputs commonly used in the literature on school quality. Finally, we compare the unadjusted ranking of universities based on the proportion of ‘good’ (first and upper second class honours) degrees awarded with that based on the estimated probability of a ‘good’ degree obtained from the microeconometric model and find significant differences between the two indicators of universities’ performance.
Effect of heavy impurities on the dynamics of supercooled liquids
Creators: name: Chakrabarty, Saurish
name: Ni, Ran
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We study the effect of heavy impurities on the dynamics of supercooled liquids. When a small fraction of particles in the supercooled liquid is made heavier, they exhibit slower dynamics than the original particles and also make the overall system slower. If one looks at the overlap correlation function to quantify dynamics in the system, it has different behavior for the heavy and the light particles. In particular, at the relaxation time of the overall system, the degree of relaxation achieved by the heavier particles is lesser on average than that achieved by the light particles. This difference in relaxation however, goes down drastically as a crossover temperature, $T_0$, is crossed. Below this crossover temperature, particles in the system have similar relaxation times irrespective of their masses. This crossover temperature depends on the fraction of the heavy particles and their masses. Next, we isolate the effect of mass heterogeneity on the dynamics of supercooled liquids and find that its effect increases monotonically with temperature. We also see that the development of dynamical heterogeneity with decreasing temperature is less dramatic for the system with impurities than for the pure system. Finally, the introduction of heavy impurities can be seen as a way of reducing the kinetic fragility of a supercooled liquid.
description: accepted in J. Chem. Phys
An Investigation Into the Material Options for the Eco-Box Program
Creators: name: Bath, Megan
name: Li, Richard
name: Amin, Amr
Publisher: name: The University of British Columbia
Year: 2011

description: 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.”
Comportement mécanique et durabilité des fils de lin exposés à l’environnement alcalin d’une matrice ettringitique
Creators: name: Zaydan, Mirna
name: MICHEL, Marie
name: CAGGEGI, Carmelo
name: CURTIL, Laurence
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: L’utilisation des matériaux composites à matrice minérale (TRM - Textile Reinforced Mortar) pour le renforcement et la réhabilitation des ouvrages historiques en maçonnerie ou les structures en béton armé est une méthode très efficace. Afin de réaliser une intervention éco-durable, nous proposons l’utilisation d’un TRM fabriqué à partir de textile de fibres naturelles et plus particulièrement de fibres de lin. Cet article étudie la durabilité des fils de lin utilisés pour la fabrication d’un TRM à matrice ettringitique. Pour étudier la durabilité de ces fils dans une matrice ettringitique, des fils de lin sont soumis à un vieillissement accéléré dans une solution de NaOH reproduisant le même pH que la matrice ettringitique (pH 10,5), à une température de 60°C. Les fils vieillis pendant une durée de 7, 14, 28 et 42 jours sont ensuite soumis à l’essai de traction directe et les résultats sont comparés avec ceux des fils non vieillis.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
Superselection from canonical constraints
Creators: name: Hall, Michael J. W.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The evolution of both quantum and classical ensembles may be described via the probability density P on configuration space, its canonical conjugate S, and an_ensemble_ Hamiltonian H[P,S]. For quantum ensembles this evolution is, of course, equivalent to the Schroedinger equation for the wavefunction, which is linear. However, quite simple constraints on the canonical fields P and S correspond to_nonlinear_ constraints on the wavefunction. Such constraints act to prevent certain superpositions of wavefunctions from being realised, leading to superselection-type rules. Examples leading to superselection for energy, spin-direction and `classicality' are given. The canonical formulation of the equations of motion, in terms of a probability density and its conjugate, provides a universal language for describing classical and quantum ensembles on both continuous and discrete configuration spaces, and is briefly reviewed in an appendix.
description: MiKTex 2.3, no figures, minor clarifications, to appear in J. Phys. A
Axiomatization of ratio equilibria in public good economies
Creators: name: Van Den Nouweland, A.
name: Tijs, S.
name: Wooders, M. H.
name: Van Den Nouweland, A.
name: Tijs, S.
name: Wooders, M. H.
Publisher: name: Unknown
Year: 2001
Subjects: Agricultural and Food Policy
Public Economics

description: Using consistency properties, we characterize the cost-sharing scheme arising from the ratio equilibrium concept for economies with public goods. The characterization turns out to be surprisingly simple and direct. In contrast to most axiomatic characterizations based on reduced games and consistency properties, our characterization requires that in the reduced game, the players take as given the proportions of the costs paid by the members of the complementary player set, rather than their utility levels
Characterization of solvable spin models via graph invariants
Creators: name: Chapman, Adrian
name: Flammia, Steven T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Exactly solvable models are essential in physics. For many-body spin-1/2 systems, an important class of such models consists of those that can be mapped to free fermions hopping on a graph. We provide a complete characterization of models which can be solved this way. Specifically, we reduce the problem of recognizing such spin models to the graph-theoretic problem of recognizing line graphs, which has been solved optimally. A corollary of our result is a complete set of constant-sized commutation structures that constitute the obstructions to a free-fermion solution. We find that symmetries are tightly constrained in these models. Pauli symmetries correspond to either: (i) cycles on the fermion hopping graph, (ii) the fermion parity operator, or (iii) logically encoded qubits. Clifford symmetries within one of these symmetry sectors, with three exceptions, must be symmetries of the free-fermion model itself. We demonstrate how several exact free-fermion solutions from the literature fit into our formalism and give an explicit example of a new model previously unknown to be solvable by free fermions.
description: 19 pages, 4 tables, 5 figures
Photometric Properties of Void Galaxies in the Sloan Digital Sky Survey
Creators: name: Rojas, Randall R.
name: Vogeley, Michael S.
name: Hoyle, Fiona
name: Brinkmann, Jon
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using a nearest neighbor analysis, we construct a sample of void galaxies from the Sloan Digital Sky Survey (SDSS) and compare the photometric properties of these galaxies to the population of non-void (wall) galaxies. We trace the density field of galaxies using a volume-limited sample with z_{max}=0.089. Galaxies from the flux-limited SDSS with z\leq z_{max} and fewer than three volume-limited neighbors within 7h^{-1}Mpc are classified as void galaxies. This criterion implies a density contrast δρ/ ρ< -0.6 around void galaxies. From 155,000 galaxies, we obtain a sub-sample of 13,742 galaxies with z\leq z_{max}, from which we identify 1,010 galaxies as void galaxies. To identify an additional 194 faint void galaxies from the SDSS in the nearby universe, r~ 72 h^{-1}Mpc, we employ volume-limited samples extracted from the Updated Zwicky Catalog and the Southern Sky Redshift Survey with z_{max}=0.025 to trace the galaxy distribution. Our void galaxies span a range of absolute magnitude from M_r=-13.5 to M_r=-22.5. Using SDSS photometry, we compare the colors, concentration indices, and Sersic indices of the void and wall samples. Void galaxies are significantly bluer than galaxies lying at higher density. The population of void galaxies with M_r ~ M* +1 and brighter is on average bluer and more concentrated (later type) than galaxies outside of voids. The latter behavior is only partly explained by the paucity of luminous red galaxies in voids. These results generally agree with the predictions of semi-analytic models for galaxy formation in cold dark matter models, which indicate that void galaxies should be relatively bluer, more disklike, and have higher specific star formation rates.
description: Accepted for publication in ApJ
The efficiency, equity and politics of emissions permit trading
Creators: name: Wooders, Myrna
name: Zissimos, Ben
name: Wooders, Myrna
name: Zissimos, Ben
Publisher: name: Unknown
Year: 2001
Subjects: Environmental Economics and Policy
International Relations/Trade

description: This paper illustrates that an international permit trading system may hurt relatively poor countries by making associated economic activities una¤ordable. A model is constructed in which the free market solution is Pareto ine¢cient as a result of pollution. The introduction of tradable permits allows pollution to be internalised, and brings about an increase in the total social surplus. But when incomes vary, this may not lead to a Pareto improvement; those in poor countries stop the polluting activity because they cannot a¤ord to do otherwise. Only those in relatively rich countries are made better o¤. This may explain why poor countries are reluctant to ratify the Kyoto Protocol, itself advocating a permit trading scheme. The politico-economic implications of permit trading are also examined. We show that the democratic requirements for rati…- cation impose a lower bound on pollution reduction that can be achieved through a system of pollution permits with trade.
This paper illustrates that an international permit trading system may hurt relatively poor countries by making associated economic activities una¤ordable. A model is constructed in which the free market solution is Pareto ine¢cient as a result of pollution. The introduction of tradable permits allows pollution to be internalised, and brings about an increase in the total social surplus. But when incomes vary, this may not lead to a Pareto improvement; those in poor countries stop the polluting activity because they cannot a¤ord to do otherwise. Only those in relatively rich countries are made better o¤. This may explain why poor countries are reluctant to ratify the Kyoto Protocol, itself advocating a permit trading scheme. The politico-economic implications of permit trading are also examined. We show that the democratic requirements for rati…- cation impose a lower bound on pollution reduction that can be achieved through a system of pollution permits with trade.
Creators: name: Leech, Dennis
name: Leech, Dennis
Publisher: name: Unknown
Year: 2001
Subjects: subject: International Development
subject: Political Economy
subject: European Union
subject: Nice Treaty
subject: Qualified Majority Voting
subject: Weighted Voting
subject: Power Indices

description: This paper examines the system of Qualified Majority Voting, used by the Council of the European Union, from the perspective of enlargement of the Union. It uses an approach based on power indices due to Penrose, Banzhaf and Coleman to make two analyses: (1) the question of the voting power of member countries from the point of view of fairness, and (2) the question of how the threshold number of votes required for QMV should be determined. It studies two scenarios for change from 2005 onwards envisaged by the Nice Treaty: (1) no enlargement, the EU comprising 15 member countries, and (2) full enlargement to 27 members by the accession of all the present twelve candidates. The proposal is made that fair weights be determined algorithmically as a technical or routine matter as the membership changes. The analysis of how the threshold affects power shows the trade-offs that countries face between their blocking power and the power of the Council to act. The main findings are: (1) that the weights laid down in the Nice Treaty are close to being fair, the only significant discrepancies being the under-representation of Germany and Romania, and the over-representation of Spain and Poland; (2) the threshold required for a decision is set too high for the Council to be an effective decision making body.
Effet de l’excentrement du renfort textile sur le comportement des composites à matrice cimentaire (TRM)
Creators: name: SAIDI, Mohamed
name: Gabor, Aron
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: La préparation des composites à matrice cimentaire, in citu comme au laboratoire, est généralement faite par la stratification manuelle. Cette technique de préparation peut aboutir à des configurations de composite avec des renforts excentrés, ce qui peut affecter la réponse mécanique de ces composites. Dans ce sens, ce papier présente une étude expérimentale de l’effet de l’excentrement du renfort textile sur le comportement en traction des composites à matrice cimentaire. Dans un premier temps, une comparaison du comportement global entre deux composites est effectuée, le premier avec renfort centré et le deuxième avec un renfort excentré. Ensuite, une analyse du comportement local du composite avec renfort excentré est abordée. Le comportement local est obtenu par l’intermédiaire des capteurs à base de fibres optiques distribuées. Ce protocole expérimental a permis de visualiser la distribution de la déformation du renfort textile et de la matrice à différentes positions le long de l’épaisseur du composite. Cette étude permet de prendre en considération l’excentrement du renfort que ce soit pour les applications de renforcement, ou pour les investigations expérimentales aux laboratoires afin de garantir une répétabilité des résultats et de mieux analyser le comportement mécanique de ces composites.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
Arbitrage and Equilibrium in Economies with Externalities
Creators: name: Le Van, Cuong
name: Page, Frank H.
name: Wooders, Myrna H.
name: Le Van, Cuong
name: Page, Frank H.
name: Wooders, Myrna H.
Publisher: name: Unknown
Year: 2001
Subjects: Agricultural and Food Policy
Research Methods/ Statistical Methods

description: We introduce consumption externalities into a general equilibrium model with arbitrary consumption sets. To treat the problem of existence of equilibrium, a condition of no unbounded arbitrage, extending the condition of Page (1987) and Page and Wooders (1993,1996) is defined. It is proven that this condition is sufficient for the existence of an equilibrium and both necessary and sufficient for compactness of the set of rational allocations
Effet des paramètres de formulation sur les caractéristiques physico-mécaniques des bétons renforcés des fibres de polypropylène
Creators: name: Ziane, Sami
name: Khelifa, Mohammed-Rissel
name: Mezhoud, Samy
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: Les fibres de polypropylène sont actuellement les fibres artificielles plus utilisées grâce à leurs bonnes propriétés mécaniques. Cette étude s’intéresse à l'effet des paramètres de formulation sur les performances mécaniques et physiques du béton renforcé de fibres de polypropylène. A cet effet, nous avons formulé, confectionné et caractérisé à l’état frais et à l’état durci cinq types de bétons, dont quatre bétons renforcés de fibres de polypropylène avec deux différentes longueurs ; L1=2cm et L2=3cm et deux différents dosages ; 0.22% et 0.33%, ainsi qu’un béton ordinaire pris comme béton témoin. Les résultats des essais ont montré que la longueur et le dosage des fibres influent d’une manière significative sur les performances mécaniques du béton à l’état frais, comme à l’état durci. Les meilleurs résultats ont été donnés par le béton renforcé de 0.22 % de fibres de polypropylène de longueur de 20 mm.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
Additional file 1 of The role of a multidisciplinary team in the management of portal hypertension
Creators: name: Yujen Tseng
name: Ma, Lili
name: Minzhi Lv
name: Tiancheng Luo
name: Chengfeng Liu
name: Yichao Wei
name: Liu, Chu
name: Zhou, Ji
name: Zhiping Yan
name: Pengju Xu
name: Guohua Hu
name: Ding, Hong
name: Ji, Yuan
name: Shiyao Chen
name: Wang, Jian
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Ecology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy

description: Additional file 1: Supplementary 1. MDT Clinic – Case Management. This supplementary file demonstrates an example of case management carried out by a multidisciplinary team specialized in the diagnosis and treatment of portal hypertension.
Some First Results for Noncooperative Pregames: Social Conformity and Equilibrium in Pure Strategies
Creators: name: Wooders, Myrna
name: Selten, Reinhard
name: Cartwright, Edward
name: Wooders, Myrna
name: Selten, Reinhard
name: Cartwright, Edward
Publisher: name: Unknown
Year: 2001
Subjects: Agricultural and Food Policy
Research Methods/ Statistical Methods

description: We introduce the framework of noncooperative pregames and demonstrate that for all games with sufficiently many players, there exist approximate (ε) Nash equilibria in pure strategies. In fact, every mixed strategy equilibrium can be used to construct an ε-equilibrium in pure strategies — ours is an ‘ε-purification’ result. Our main result is that there exists an ε- equilibrium in pure strategies with the property that most players choose the same strategies as all other players with similar attributes. More precisely, there is an integer L, depending on ε but not on the number of players, so that any sufficiently large society can be partitioned into fewer than L groups, or cultures, consisting of similar players, and all players in the same group play the same pure strategy. In ongoing research, we are extending the model to cover a broader class of situations, including incomplete information. We would be grateful for any comments that might help us improve the paper.
Phase transition dynamics and gravitational wave spectra of strong first-order phase transition in supercooled universe
Creators: name: Wang, Xiao
name: Huang, Fa Peng
name: Zhang, Xinmin
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Phase transition dynamics may play important roles in the evolution history of the early universe, such as its possible roles in electroweak baryogenesis and dark matter.We systematically discuss and clarify the important details of the phase transition dynamics during a strong first-order phase transition (SFOPT). We classify the SFOPT into four types: slight supercooling, mild supercooling, strong supercooling, and ultra supercooling. Using different characteristic temperatures, length scales and bubble wall velocities, the corresponding gravitational wave (GW) spectra are investigated in details. We emphasize the essential importance of using the correct characteristic temperature and length scale when the phase transition dynamics and GW spectra are calculated. Especially, for strong supercooling and ultra supercooling cases, there are obvious differences of the phase transition strength and GW spectra between the results calculated at the nucleation temperature and those derived at the percolation temperature. For ultra supercooling case, we propose a criterion to quantify whether the phase transition can terminate. Besides the model-independent discussions, we also study three representative models as concrete examples to clearly show the subtle points therein.
description: Published version in JCAP, 58 pages, 34 figures, 8 tables
Leadership Cartels in Industries with Differentiated Products
Creators: name: Posada, Pedro
name: Posada, Pedro
Publisher: name: Unknown
Year: 2001
Subjects: subject: Industrial Organization
subject: Public Economics
subject: cartel stability
subject: product differentiation
subject: Stakelberg leader

description: This article analyses cartels that act as a Stackelberg leader with respect to a competitive fringe in industries supplying di¤erentiated products. The main objectives are to investigate how cartel stability changes with the degree of di¤erentiation and the cartel size, to predict endogenous cartels and to carry out a welfare analysis. Both repeated and static games are considered as well as industries competing in quantities and prices. The results indicate that the degree of stability can be either an increasing, decreasing or non-monotonic function of the degree of product di¤erentiation, depending on the cartel size, the industry size, the competition type and the reaction of cartel loyal members to defection. An endogenous cartel size is also predicted. Other signi…cant results are: some cartels can be sustained under simple static game Nash equilibrium, some cartels may be socially desirable, not all cartels are beneficial for the fringe members and a free riding problem does not necessarily emerge.