cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Numerical modelling of pitting corrosion in RC structures
Creators: name: El Alami, Eliass
name: Fekak, Fatima-Ezzahra
name: Garibaldi, Luigi
name: El Khalfi, Ahmed
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: During its life expectancy, a RC structure is exposed to corrosion. This phenomenon attacks the reinforcement and lead to the creation of a third material that is rust, at the expense of steel. This corrosion material takes more volume than the lost volume of steel and generates internal stresses that lead to the deterioration of the steel-concrete interface and to the cracking of the concrete cover. The distribution of the rust around the reinforcement for a natural corrosion is non-uniform and irregular. This distribution is associated to corrosion “pits” that are localized and concentrated in the regions exposed to corrosion. To better study and understand the phenomenon of pitting corrosion, a 2D numerical model is adopted. This model associates the corrosion of the reinforcement to a single pit, located at the top of the rebar. A model that take into account the damaging of the concrete in compression and tension is used and an interface between the two materials that models a tangential and normal contact is adopted.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
Multiproduct Firms and Product Differentiation: A Survey
Creators: name: Manez, Juan A.
name: Waterson, Michael
name: Manez, Juan A.
name: Waterson, Michael
Publisher: name: Unknown
Year: 2001
Subjects: subject: Agricultural and Food Policy
subject: Industrial Organization
subject: Production Economics
subject: multi-product competition
subject: horizontal and vertical product differentiation

description: We start the survey by reviewing the implications of horizontal and vertical product differentiation on market structure under the assumption of single-product firms. Then, we analyse the main results of the multi-product firm models, both when variants are assumed differentiated in vertical attributes only and when variants are assumed differentiated in two dimensions (vertical and horizontal). Finally, we review the empirical literature about discrete-choice models of product differentiation.
Impact of a microwave treatment of hemp fibers on the hemp / cement interaction
Creators: name: Delhomme, Fabien
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: As the need to reduce grey energies is growing, materials such as hempcrete are in development. The thermal and acoustic insulation it offers, combined with the very low carbon footprint of hemp make it a first choice material. However, the great amount of hemp in hempcrete, combined with de weakness of the interface fibers/cement binder leads to poor mechanical resistance of hempcrete. This is due to a significant absorption of water by hemp and by components such as lignin, or hemicellulose, which slow down the setting of cement. This induces a poor transfer of the applied stress and therefore poor mechanical resistance at compression tests. Several chemical and chemical & physical treatments have been investigated to solve this problem. This study focuses on the impact of a treatment based on a microwave heating on the properties of hemp and hempcrete. The influence of such treatment will be evaluated in terms of water absorption, index of crystallinity, halo of hydration, and mechanical properties.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
Recursive Star-Identification Algorithm using an Adaptive SVD-based Angular Velocity Estimator
Creators: name: Johnston, Hunter
name: Leake, Carl
name: de Almeida, Marcelino M.
name: Mortari, Daniele
Publisher: name: arXiv
Year: 2020
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper describes an algorithm obtained by merging a recursive star identification algorithm with a recently developed adaptive SVD-based estimator of the angular velocity vector (QuateRA). In a recursive algorithm, the more accurate the angular velocity estimate, the quicker and more robust to noise the resultant recursive algorithm is. Hence, combining these two techniques produces an algorithm capable of handling a variety of dynamics scenarios. The speed and robustness of the algorithm are highlighted in a selection of simulated scenarios. First, a speed comparison is made with the state-of-the-art lost-in-space star identification algorithm, Pyramid. This test shows that in the best case the algorithm is on average an order of magnitude faster than Pyramid. Next, the recursive algorithm is validated for a variety of dynamic cases including a ground-based "Stellar Compass" scenario, a satellite in geosynchronous orbit, a satellite during a re-orientation maneuver, and a satellite undergoing non-pure-spin dynamics.
description: 15 pages, 11 figures, 6 tables
Construction of Stationary Time Series via the Gibbs Sampler with Application to Volatility Models
Creators: name: Pitt, Michael K.
name: Walker, Stephen G.
name: Pitt, Michael K.
name: Walker, Stephen G.
Publisher: name: Unknown
Year: 2001
Subjects: subject: Agricultural and Food Policy
subject: Research Methods/ Statistical Methods
subject: ARCH
subject: Exponential family
subject: GARCH
subject: Gibbs sampler
subject: Filtering
subject: Markov chains
subject: Markov chain Monte Carlo
subject: Stochastic Volatility

description: In this paper, we provide a method for modelling stationary time series. We allow the family of marginal densities for the observations to be specied. Our approach is to construct the model with a specied marginal family and build the dependence structure around it. We show that the resulting time series is linear with a simple autocorrelation structure. In particular, we present an original application of the Gibbs sampler. We illustrate our approach by fitting a model to time series count data with a marginal Poisson-gamma density.
Additional file 1 of Assessing patient safety in a pediatric telemedicine setting: a multi-methods study
Creators: name: Haimi, Motti
name: Shuli Brammli-Greenberg
name: Baron-Epel, Orna
name: Waisman, Yehezkel
Publisher: name: figshare
Year: 2020
Subjects: subject: Medicine
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1: Supplemental Table 1. Medical Factors and ED Referral.
Corona-Heated Accretion-disk Reprocessing (CHAR): A Physical Model to Decipher the Melody of AGN UV/optical Twinkling
Creators: name: Sun, Mouyuan
name: Xue, Yongquan
name: Brandt, W. N.
name: Gu, Wei-Min
name: Trump, Jonathan R.
name: Cai, Zhenyi
name: He, Zhicheng
name: Lin, Da-bin
name: Liu, Tong
name: Wang, Junxian
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Active galactic nuclei (AGNs) have long been observed to "twinkle" (i.e., their brightness varies with time) on timescales from days to years in the UV/optical bands. Such AGN UV/optical variability is essential for probing the physics of supermassive black holes (SMBHs), the accretion disk, and the broad-line region. Here we show that the temperature fluctuations of an AGN accretion disk, which is magnetically coupled with the corona, can account for observed high-quality AGN optical light curves. We calculate the temperature fluctuations by considering the gas physics of the accreted matter near the SMBH. We find that the resulting simulated AGN UV/optical light curves share the same statistical properties as the observed ones as long as the dimensionless viscosity parameter $α$, which is widely believed to be controlled by magnetohydrodynamic (MHD) turbulence in the accretion disk, is about $0.01$---$0.2$. Moreover, our model can simultaneously explain the larger-than-expected accretion disk sizes and the dependence of UV/optical variability upon wavelength for NGC 5548. Our model also has the potential to explain some other observational facts of AGN UV/optical variability, including the timescale-dependent bluer-when-brighter color variability and the dependence of UV/optical variability on AGN luminosity and black hole mass. Our results also demonstrate a promising way to infer the black-hole mass, the accretion rate, and the radiative efficiency, thereby facilitating understanding of the gas physics and MHD turbulence near the SMBH and its cosmic mass growth history by fitting the AGN UV/optical light curves in the era of time-domain astronomy.
description: 25 pages, 25 figures. Accepted to ApJ. The two figsets can be downloaded from https://www.mysun.work/projects/charm/
A Design of anchors in masonry under seismic loads
Creators: name: Delhomme, Fabien
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: Fastenings to set up technical equipment, façade, and secondary structural components, are widely used in building construction. Their static design, which depends on the type of support systems and anchors, is clearly defined in standard codes. However, a lack of standard design rules under seismic loadings in masonry support is noticed. The main difficulty is the wide variability of type of masonry supports and anchors. Nowadays, the only strict design method is to carry out standard seismic tests for each anchor/masonry support couple. From practical and financial aspects, in particular in existing masonries, this solution is toughly doable. The aim of these researches is to define a design method to calculate the seismic design resistance from standard pullout in-situ static tests. A statistical analyse was conducted on laboratory static and cyclic tests on 9 couples anchor/masonry support. Finally, a methodology, with two seismic safety factors to apply to the static strength for hollow or solid masonries, is given. Their values are respectively 1.75 and 1.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
Real exchange rate trends in transitional countries
Creators: name: Frait, Jan
name: Komarek, Lubos
name: Frait, Jan
name: Komarek, Lubos
Publisher: name: Unknown
Year: 2001
Subjects: subject: Financial Economics
subject: International Relations/Trade
subject: real exchange rate
subject: transition
subject: Czech Republic
subject: competitiveness

description: The paper presents an analysis of the determinants of the real exchange rate with emphasis on its long-term aspects and searching for the equilibrium paths. It introduces the behavioural models of exchange rates (especially the BEER and the NATREX), that are alternatives to the often-used fundamental models of the FEER type. Authors constructed the theoretical and econometric behavioural model, which could analyse the medium-term and long-term dynamics of the real exchange rate. This paper also introduces real exchange rate as an indicator of convergence for transitional countries to EU countries and analyses the link between real exchange rate and double speed economy or deindustrialisation, respectively. This analysis is relevant almost for all transitional countries now. The paper explains the appreciation trend of real exchange rates in transitional economies. It is identifying the set of factors that let to sustainable real appreciation of the Czech Koruna and also the set of factors that possibly caused unsustainable real depreciation in the past. There is also a set of arguments against any other rapid real appreciation of the Czech Koruna. The paper also tried to fuel these arguments by an econometric analysis, which used our behavioural model of the equilibrium real exchange rate. It was shown that the Czech real exchange rate was especially determined by real fundamental factors: productivity, terms of trade and world interest rates and foreign direct investment.
Electrostatic quantum dot confinement in phosphorene
Creators: name: Szafran, B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We consider states localized by electrostatic potentials in phosphorene using an atomistic tight binding approach. From the results of the tight-binding calculations of the confined states we extract effective masses for the conduction band electrons in the armchair and zigzag directions. The masses derived in this way are used for a simple single-band effective mass model which, as we find, reproduces very well the tight-binding energy spectrum in external magnetic field, the probability densities and the interaction effects. Both methods produce Wigner crystallization for the ground-state of the electron pair with the single-electron islands separated in the armchair direction already for small quantum dots.
Additional file 1 of PF-127 hydrogel plus sodium ascorbyl phosphate improves Wharton’s jelly mesenchymal stem cell-mediated skin wound healing in mice
Creators: name: Qingzha Deng
name: Sunxing Huang
name: Jinkun Wen
name: Yiren Jiao
name: Xiaohu Su
name: Shi, Guang
name: Junjiu Huang
Publisher: name: figshare
Year: 2020
Subjects: subject: Space Science
subject: Medicine
subject: Cell Biology
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: Developmental Biology
subject: Cancer

description: Additional file 1: Figure S1. WJMSCs flow cytometry identification. (A) Flow cytometry analysis of P1 cells using mesenchymal stem cells markers (HLA-ABC, CD105, CD13, CD29, CD44, CD73), endothelial cells marker (CD31), hematopoietic cells markers (CD14, CD45), and MHC class II protein HLA-DR. Isotypic antibodies (IgG1-PE and IgG1-FITC) were used as negative controls. Figure S2. PF-127 plus SAP combination promotes WJMSCs-mediated wound healing. (A) Hematoxylin-eosin (H&E) staining images (transverse cutting) of the wound site together with surrounding normal skin tissue in different groups at day 8 after surgery. Scale bar: 500 μm. (B) Quantitation data of residual wound area at day 8 after surgery. Data were presented as mean ± SD, n = 4. Statistical analyses were performed by One-way ANOVA analysis followed by Tukey’s post-test. **p < 0.01, ***p < 0.001. Figure S3. PF-127 plus SAP combination promotes WJMSCs engraftment into dermis. (A) Construction of a WJMSC line stably expressing EGFP. (B) Western Blot confirmed EGFP protein in the WJMSC line. (C) Representative fluorescence images of EGFP-overexpressing WJMSCs in different groups at 24 h post-transplantation, which was examined by cryo-sectioning. Signals: EGFP, green; DAPI, blue. Scale bar: 50 μm. (D) Quantitation data of cell number per field at 24 h in different groups. Data were presented as mean ± SD, n = 3. Statistical analyses were performed by One-way ANOVA analysis followed by Tukey’s post-test. *p < 0.05.
Effet du laitier de haut fourneau et des fumées de silice sur la composition des solutions interstitielles des matériaux cimentaires.
Creators: name: CHERIF, Rachid
name: HAMAMI, Ameur El Amine
name: AÏT-MOKHTAR, Abdelkarim
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: Cet article présente la substitution du ciment par le laitier de haut fourneau et des fumées de silice dans les «éco-bétons» sur la composition chimique des solutions interstitielles. Cette composition alimente les modèles de transfert ionique en termes de conditions initiales. En raison du manque de données dans la littérature concernant la composition des solutions porales des matériaux à base d'ajouts minéraux, trois types de pâtes de ciment durcies ont été testées. Pour ce faire, un ciment Portland (CEM I) et des additions minérales (laitier de haut fourneau et fumée de silice) ont été utilisés.Tout d'abord, les résultats des analyses chimiques par chromatographie ionique ont montré une concentration significative d'ions bivalents tels que le calcium et les sulfates dans la solution interstitielle. La pâte de ciment de référence à base de CEM contient 1,8 mmol / l de calcium et 1,6 mmol / l de sulfates. Par ailleurs, l'utilisation des additions minérales modifiées la solution interstitielle. En effet, la substitution du ciment par 10% de fumées de silice augmente les concentrations en calcium et en sulfates à 12,2 mmol / l et 6,7 mmol / l respectivement. La modification de la composition chimique et, par conséquent, le pH et la force ionique, doit être prise en considération dans la modélisation du transfert multi-espèces et des équilibres thermodynamiques.la substitution du ciment par 10% de fumées de silice augmente les concentrations en calcium et en sulfates à 12,2 mmol / l et 6,7 mmol / l respectivement. La modification de la composition chimique et, par conséquent, le pH et la force ionique, doit être prise en considération dans la modélisation du transfert multi-espèces et des équilibres thermodynamiques. la substitution du ciment par 10% de fumées de silice augmente les concentrations en calcium et en sulfates à 12,2 mmol / l et 6,7 mmol / l respectivement. La modification de la composition chimique et, par conséquent, le pH et la force ionique, doit être prise en considération dans la modélisation du transfert multi-espèces et des équilibres thermodynamiques.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
Melitoma Lepeletier & Serville
Creators: name: RAMOS, KELLI S.
name: KAWADA, RICARDO
name: BRANDÃO, CARLOS ROBERTO F.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Apidae
Melitoma

description: Melitoma Lepeletier & Serville
  Podalirius ipomoeae Ducke, 1907b: 84  Paralectotype: 1♀ ‘ Brazil, Estado do Maranhão’ ‘[Brazil], Maranhão, Caxias, 02.vii.1907, Ducke [col.]’ ‘ Melitoma ipomoearum Ducke, typo’. Current status: Melitoma ipomoearum Ducke, 1912. Comments: Paralectotype according to designation by Nascimento (1979: 8).
description: Published as part of RAMOS, KELLI S., KAWADA, RICARDO & BRANDÃO, CARLOS ROBERTO F., 2015, Type specimens of bees (Hymenoptera, Apidae) deposited in the Museu de Zoologia da Universidade de São Paulo, Brazil, pp. 335-361 in Papéis Avulsos de Zoologia (São Paulo) (São Paulo) 55 (24) on page 344, DOI: 10.1590/0031-1049.2015.55.24, http://zenodo.org/record/4656393
A Quantitative Clustering Approach to Ultrametricity in Spin Glasses
Creators: name: Ciliberti, Stefano
name: Marinari, Enzo
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We discuss the problem of ultrametricity in mean field spin glasses by means of a hierarchical clustering algorithm. We complement the clustering approach with quantitative testing: we discuss both in some detail. We show that the elimination of the (in this context accidental) spin flip symmetry plays a crucial role in the analysis, since the symmetry hides the real nature of the data. We are able to use in the analysis disorder averaged quantities. We are able to exhibit a number of features of the low $T$ phase of the mean field theory, and to claim that the full hierarchical structure can be observed without ambiguities only on very large lattice volumes, not currently accessible by numerical simulations.
description: 15 pages with color figures
Shot noise multifractal model for turbulent pseudo-dissipation
Creators: name: Apolinário, G. B.
name: Moriconi, L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Multiplicative cascades have been used in turbulence to generate fields with multifractal statistics and long-range correlations. Examples of continuous and causal stochastic processes which generate such a random field have been carefully discussed in the literature. Here a causal lognormal stochastic process is built to represent the dynamics of pseudo-dissipation in a Lagrangian trajectory. It is introduced as the solution of a stochastic differential equation, driven by a source of noise which has sudden jumps at periodic intervals, its period being the dissipative time scale of the flow. This random field has scale invariance for a continuum of scales, and displays discontinuous jumps in time, with a smooth time evolution below the Kolmogorov scale. Its multifractal and correlation properties are demonstrated numerically.
description: 35 pages, 10 figures
Simulium (Rubzovia) paraloutetense Crosskey 1988
Creators: name: Crosskey, R. W.
name: BÁez, M.
Publisher: name: Zenodo
Year: 2004
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Simuliidae
Simulium
Simulium paraloutetense

description: Simulium (Rubzovia) paraloutetense Crosskey
 Material from breeding sites
 Gran Canaria: Site GC14— 8 larvae (27 March 1994) (BM / ANN), 1 pupal cocoon, 29 larvae (29 March 1995) (RWC), 3 pupae [pharate adult males] (16 November 1995) (BM / ANN) and 1 larva (18 March 1997) (RWC).
 Remarks
 Crosskey et al. (1998) have dealt with this very rare endemic species in detail, providing the first description of its aquatic stages and a discussion of its taxonomic affinities, together with an account of its spring habitat in the Barranco de Guayadeque in Gran Canaria (Site 14, the only discovered breeding site). The aquatic stages are easily recognized: the pupal gill has a stout U-like structure (figure 33) and the larva almost completely lacks the postgenal cleft of the cranium (figure 10). The species was the only simuliid occurring at the one known breeding site and was always at very low density. The sum of material found at five prospections of the site between 1994 and 1998 was only 38 larvae, three male pupae (each at pharate adult stage) and one pupal cocoon. Complete extinction of the species, very soon if it has not already occurred, seems certain unless there are any surviving populations in remote mountain springs: recent inspection (by MB) of the site in the Barranco de Guayadeque has shown it to be now dry and destroyed, apparently having been in this degraded state for a considerable time.
 P. H. Adler studied the larval polytene chromosomes of S. paraloutetense from a small Carnoy’s-fixed subset of the larvae collected (RWC) on 29 March 1995. The haploid number 3 (2n~6) is normal, the nucleolar organizer is in chromosome II adjacent to its centromere, the centromeres of chromosomes I and II tend to combine into a partial chromocentre, and sex chromosomes are not differentiated; polymorphisms were not seen in the small sample available (two male and five female larvae). A brief description of the karyotype has been given by Crosskey et al. (1998: 387) and a photograph of the polytene chromosome complement is given here in figure 40. At present there are no cytological data for other western Palaearctic species of the subgenus Rubzovia, namely S. (R) lamachi Doby and David and S. (R.) knidirii which both occur in Morocco, for comparison with the data on S. (R.) paraloutetense.
description: Published as part of Crosskey, R. W. & BÁez, M., 2004, A synopsis of present knowledge of the Simuliidae (Diptera) of the Canary Islands, including keys to the larval and pupal stages, pp. 2085-2117 in Journal of Natural History 38 (16) on pages 2097-2099, DOI: 10.1080/0022293032000140958, http://zenodo.org/record/4658794
Monopole Field Textures in Interacting Spin Systems
Creators: name: Eriksson, Andreas
name: Sjöqvist, Erik
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Magnetic monopoles can appear as emergent structures in a wide range of physical settings, ranging from spin ice to Weyl points in semimetals. Here, a distribution of synthetic (Berry) monopoles in parameter space of a slowly changing external magnetic field is demonstrated in a system of interacting spin-$\frac{1}{2}$ particles with broken spherical symmetry. These monopoles can be found at points where the external field is nonzero. The spin-spin interaction provides a mechanism for splitting the synthetic local magnetic charges until their magnitude reach the smallest allowed value $\frac{1}{2}$. For certain states, a nonzero net charge can be created in an arbitrarily large finite region of parameter space. The monopole field textures contain non-monopolar contributions in the presence of spin-spin interaction.
description: A missing factor 4 in the DM term in Eq. 1 has been added. Journal reference added
Isometry of AdS2 And The c=1 Matrix Model
Creators: name: Ho, Pei-Ming
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Implications of the SL(2,R) symmetry of the c = 1 matrix models are explored. Based on the work of de Alfaro, Fubini and Furlan, we note that when the Fermi sea is drained, the matrix model for 2 dimensional string theory in the linear dilaton background is equivalent to the matrix model of AdS_2 recently proposed by Strominger, for which SL(2,R) is an isometry. Utilizing its Lie algebra, we find that a topological property of AdS_2 is responsible for quantizing D0-brane charges in type 0A theory. We also show that the matrix model faithfully reflects the relation between the Poincare patch and global coordinates of AdS_2.
description: 17 pages, 6 figures
Caractérisation mécanique et thermique d’un biomatériau à base de terre et des fibres végétales.
Creators: name: Rachid, Bouferra
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: L'objectif de cette étude est la valorisation des matériaux naturels renouvelables locaux destinés à être utilisés en tant que matériaux de construction. L’effet d’incorporation des fibres de la plante d’Alfa dans la matrice pisé a été étudié. On note que le broyage donne une meilleure caractéristique mécanique. L’ajout de fibres d’Alfa dans la matrice pisé augmente d’une manière importante la résistance à la compression et confère au matériau une ductilité plus grande que celui non fibré. Cette augmentation de la résistance à la compression est amplifiée pour une fraction de 1,5%. Les résultats obtenus montrent également une diminution de conductivité thermique pour une augmentation des proportions de fibres, ce qui améliore leur utilisation dans l'isolation thermique.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
“Government Collusion in Janeba’s Model of Multijurisdictional Tax Competition”
Creators: name: Barton, Lloyd
name: Barton, Lloyd
Publisher: name: Unknown
Year: 2001
Subjects: Agricultural and Food Policy
Financial Economics
Political Economy

description: Eckhard Janeba (Dec 2000 “Tax Competition when Governments lack Commitment” American Economic Review 90, 1508-19) has recently suggested a novel approach to modelling the relationship between governments and multinational firms. As part of ongoing research into various aspects of multijurisdictional tax competition, this paper investigates the possibility of allowing for collusion between governments when setting tax rates in the model. The findings show that a self-enforcing agreement is possible, with the beneficial effect of cutting the firm’s excess profits, limiting investment in excess capacity, and raising government revenue.
Non-Bloch band theory of non-Hermitian Hamiltonians in the symplectic class
Creators: name: Kawabata, Kohei
name: Okuma, Nobuyuki
name: Sato, Masatoshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Non-Hermitian Hamiltonians are generally sensitive to boundary conditions, and their spectra and wave functions under open boundary conditions are not necessarily predicted by the Bloch band theory for periodic boundary conditions. To elucidate such a non-Bloch feature, recent works have developed a non-Bloch band theory that works even under arbitrary boundary conditions. Here, it is demonstrated that the standard non-Bloch band theory breaks down in the symplectic class, in which non-Hermitian Hamiltonians exhibit Kramers degeneracy because of reciprocity. Instead, a modified non-Bloch band theory for the symplectic class is developed in a general manner, as well as illustrative examples. This nonstandard non-Bloch band theory underlies the $\mathbb{Z}_{2}$ non-Hermitian skin effect protected by reciprocity.
description: 13 pages, 2 figures
An investigation into energy storage for use with renewable energy generation in the new SUB
Creators: name: Beales, Joel
name: Serwa, Jason
name: Slade, Andrea
Publisher: name: The University of British Columbia
Year: 2014

description: Renewable energy is a key component in the new SUB project. The project vision, set out by the AMS to guide the project to completion, states one of the specific sustainability targets to meet LEED Platinum certification includes “design for a potential improvement of energy performance over time, to net zero energy use if possible” (SUB Vision). The largest challenge in implementing successful renewable energy systems is the storage and then redistribution of this energy. The scope of this report is to carry out a triple bottom line assessment, including social, environmental and economic aspects, of energy storage methods for the new SUB. Three technologies are investigated, which include pumped hydro, flywheel, and battery storage. Both negative and positive impacts are addressed in order to determine the most viable option. Criteria to base to negative and positive impacts include successful implementation of the technology elsewhere, cost effectiveness, energy density, reliance on non-renewable resources, social consequences involved in the materials, and can function feasibly with renewable energy methods while demonstrating energy storage to the public. To compare the technologies, it is assumed the SUB is operating as net-positive energy and a baseline value is used to reflect this. Taking all factors into consideration, batteries are concluded to be the most viable energy storage option for the new SUB project. What it lacks in demonstrating sustainable energy practices to the public is more than redeemed in the overall cost savings, high energy storage capacity per volume and weight, as well as the highly effective recycling programs that limit the negative impacts to the environment. 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.”
Atmospheric neutrinos in a next-generation xenon dark matter experiment
Creators: name: Newstead, Jayden L.
name: Lang, Rafael F.
name: Strigari, Louis E.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the sensitivity of future xenon- and argon-based dark matter and neutrino detection experiments to low-energy atmospheric neutrinos. Not accounting for experimental backgrounds, the primary obstacle for identifying nuclear recoils induced by atmospheric neutrinos is the tail of the electron recoil distribution due to $pp$ solar neutrinos. We use the NEST code to model the solar and atmospheric neutrino signals in a xenon detector and find that an exposure of 700 tonne-years will produce a $5σ$ detection of atmospheric neutrinos. We explore the effect of different detector properties and find that a sufficiently long electron lifetime is essential to the success of such a measurement.
description: 7 pages, 6 figures, code and results available at https://doi.org/10.5281/zenodo.3653516
Position-sensitive detector for the 6-meter optical telescope
Creators: name: Debur, V.
name: Arkhipova, T.
name: Beskin, G.
name: Plokhotnichenko, V.
name: Pakhomov, M.
name: Smirnova, M.
name: Solin, A.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Position-Sensitive Detector (PSD) for photometrical and spectral observation on the 6-meter optical telescope of the Special Astrophysical Observatory (Russia) is described. The PSD consists of a position-sensitive tube, amplifiers of output signals, analog-to-digital converters (ADC) and a digital logic plate, which produces a signal for ADC start and an external strob pulse for reading information by registration system. If necessary, the thermoelectric cooler can be used. The position-sensitive tube has the following main elements: a photocathode, electrodes of inverting optics, a block of microchannel plates (MCP) and a position-sensitive collector of quadrant type. The main parameters of the PSD are the diameter of the sensitive surface is 25 mm, the spatial resolution is better than 100 (μ)m in the centre and a little worse on the periphery; the dead time is near 0.5 (μ)s; the detection quantum efficiency is defined by the photocathode and it is not less than 0.1, as a rule; dark current is about hundreds of cps, or less, when cooling. PSD spectral sensitivity depends on the type of photocathode and input window material. We use a multialkali photocathode and a fiber or UV-glass, which gives the short- wave cut of 360 nm or 250 nm, respectively.
description: 4 pages, 7 figures, to be published in Nuclear Instruments & Methods in Physics Research
Functional Thermodynamics of Maxwellian Ratchets: Constructing and Deconstructing Patterns, Randomizing and Derandomizing Behaviors
Creators: name: Jurgens, Alexandra M.
name: Crutchfield, James P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Information Theory (cs.IT)
subject: Dynamical Systems (math.DS)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Maxwellian ratchets are autonomous, finite-state thermodynamic engines that implement input-output informational transformations. Previous studies of these "demons" focused on how they exploit environmental resources to generate work: They randomize ordered inputs, leveraging increased Shannon entropy to transfer energy from a thermal reservoir to a work reservoir while respecting both Liouvillian state-space dynamics and the Second Law. However, to date, correctly determining such functional thermodynamic operating regimes was restricted to a very few engines for which correlations among their information-bearing degrees of freedom could be calculated exactly and in closed form---a highly restricted set. Additionally, a key second dimension of ratchet behavior was largely ignored---ratchets do not merely change the randomness of environmental inputs, their operation constructs and deconstructs patterns. To address both dimensions, we adapt recent results from dynamical-systems and ergodic theories that efficiently and accurately calculate the entropy rates and the rate of statistical complexity divergence of general hidden Markov processes. In concert with the Information Processing Second Law, these methods accurately determine thermodynamic operating regimes for finite-state Maxwellian demons with arbitrary numbers of states and transitions. In addition, they facilitate analyzing structure versus randomness trade-offs that a given engine makes. The result is a greatly enhanced perspective on the information processing capabilities of information engines. As an application, we give a thorough-going analysis of the Mandal-Jarzynski ratchet, demonstrating that it has an uncountably-infinite effective state space.
description: 16 pages, 7 figures; supplemental materials, 8 pages, 3 figures; http://csc.ucdavis.edu/~cmg/compmech/pubs/ftamr.htm
Photon-assisted tunneling in a Fe8 Single-Molecule Magnet
Creators: name: Sorace, L.
name: Wernsdorfer, W.
name: Thirion, C.
name: Barra, A. -L.
name: Pacchioni, M.
name: Mailly, D.
name: Barbara, B.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The low temperature spin dynamics of a Fe8 Single-Molecule Magnet was studied under circularly polarized electromagnetic radiation allowing us to establish clearly photon-assisted tunneling. This effect, while linear at low power, becomes highly non-linear above a relatively low power threshold. This non-linearity is attributed to the nature of the coupling of the sample to the thermostat.These results are of great importance if such systems are to be used as quantum computers.
description: 4 pages, 4 figures
Modélisation numérique bidimensionnelle de l’écoulement de suspensions cimentaires lors du procédé d’impression 3D par liaison sélective
Creators: name: PIERRE, Alexandre
name: Perrot, Arnaud
name: Weger, Daniel
name: Lowke, Dirk
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: La fabrication additive de matériaux à base de béton et de ciment devrait révolutionner le domaine de la construction. Dans le cas de la technique d'intrusion sélective de pâte, la buse de l'imprimante 3D applique le liant composé d'eau, de ciment et d'adjuvants sur un lit de particules de sable. Pour atteindre un matériau homogène en utilisant la méthode d'intrusion sélective de la pâte, la couche d'agrégat en sable doit être complètement pénétrée par la pâte de ciment pour se lier avec les autres couches. Par conséquent, cet article vise à fournir et à valider la pénétration des fluides à seuil tels que les suspensions cimentaires à travers une matrice granulaire en utilisant la simulation numérique. Une analyse numérique 2D à l'aide d'un logiciel commercial est réalisée pour étudier le chemin d'écoulement préférentiel. Une méthode numérique de champ de phase et un modèle visco-plastique régularisé continu ont été utilisés pour simuler le procédé d’impression, évaluer la pénétration des suspensions et comparer les résultats numériques avec un modèle expérimental et analytique de la littérature. Nous montrons que la modélisation numérique est capable de prédire l'évaluation de la profondeur de pénétration en fonction de la contrainte seuil de mise en écoulement du matériau, de l'angle de contact et des propriétés du lit de particules de sable.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
Agrilus anceps Curletti & Migliore 2014, sp. nov.
Creators: name: Curletti, Gianfranco
name: Migliore, Letizia
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Buprestidae
Agrilus
Agrilus anceps

description: Agrilus anceps sp. nov.
 (Fig. 2)
 Etimologia: anceps, latim, “com duas faces”, devido aos élitros verdes anteriormente e acobreados posteriormente.
Comprimento 7,9 mm. Fronte glabra, levemente sulcada longitudinalmente, escultura grosseira, cor que passa gradualmente do verde do vértice para o vermelho-cobre na base. Clípeo nitidamente em relevo em relação à linha frontal. Genas pequenas com pubescência branca. Antenas curtas, bronzeadas; antenômeros pequenos lobados a partir do artículo IV. Mentoneira pouco expandida, com margem anterior arredondada e inteira. Processo prosternal com parte apical fortemente expandida. Pronoto com carena pré- -umeral inteira. Carenas marginais com a mesma origem na base. Laterotergitos revestidos por pubescência amarela uniforme. Lado ventral do corpo brônzeo- -escuro, glabro, com exceção dos metepisternos e das metacoxas onde a pubescência é mais visível. O urosternito V visível com margem apical inteira e arredondada. Pernas acobreadas como o ventre; unhas bífidas com dente interno mais curto que o dente externo. Metatarso curto, com metarsômero basal menos longo do que a soma dos três seguintes I <II + III + IV.
 Material tipo: Holótipo ♀: BRASIL, Espirito Santo, Linhares (Parque Sooretama), 17-27.X.1962, F.S. Pereira leg. (MZUSP).
 Discussão: O conjunto de caracteres, incluindo o ápice fortemente denticulado, a presença de única mancha pubescente nos 3/4 do élitro, a cor verde esmeralda da metade anterior e a cor vermelha da metade posterior do élitro são únicas dentre as espécies sul-americanas.
description: Published as part of Curletti, Gianfranco & Migliore, Letizia, 2014, O gênero Agrilus Curtis, 1829 nas coleções do Museu de Zoologia da Universidade de São Paulo (Coleoptera: Buprestidae), pp. 81-106 in Papéis Avulsos de Zoologia (São Paulo) (São Paulo) 54 (8) on page 83, DOI: 10.1590/0031-1049.2014.54.08, http://zenodo.org/record/4656297
T-duality for torus bundles via noncommutative topology
Creators: name: Mathai, Varghese
name: Rosenberg, Jonathan
Publisher: name: arXiv
Year: 2004
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Operator Algebras (math.OA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: It is known that the T-dual of a circle bundle with H-flux (given by a Neveu-Schwarz 3-form) is the T-dual circle bundle with dual H-flux. However, it is also known that torus bundles with H-flux do not necessarily have a T-dual which is a torus bundle. A big puzzle has been to explain these mysterious "missing T-duals.'' Here we show that this problem is resolved using noncommutative topology. It turns out that every principal 2-torus-bundle with H-flux does indeed have a T-dual, but in the missing cases (which we characterize), the T-dual is non-classical and is a bundle of noncommutative tori. The duality comes with an isomorphism of twisted K-theories, just as in the classical case. The isomorphism of twisted cohomology which one gets in the classical case is replaced by an isomorphism of twisted cyclic homology.
description: 16 pages, Latex2e, 1 figure
Agrilus aurocephalus Gory 1841
Creators: name: Curletti, Gianfranco
name: Migliore, Letizia
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Buprestidae
Agrilus
Agrilus aurocephalus

description: Agrilus aurocephalus Gory, 1841
 Agrilus aurocephalus Gory, 1841: 218.
 Material examinado: 7 exs., BRASIL, Santa Catarina, Anita Garibaldi, XII.1950, Dirings leg. ; Nova Teutônia, XI.1966, F. Plaumann leg. ; Paraná, Caviuna (atu-
 al Rolândia), XI.1956, Dirings leg. ; São Paulo (Cantareira), XII.1950, Dirings leg.
description: Published as part of Curletti, Gianfranco & Migliore, Letizia, 2014, O gênero Agrilus Curtis, 1829 nas coleções do Museu de Zoologia da Universidade de São Paulo (Coleoptera: Buprestidae), pp. 81-106 in Papéis Avulsos de Zoologia (São Paulo) (São Paulo) 54 (8) on pages 83-84, DOI: 10.1590/0031-1049.2014.54.08, http://zenodo.org/record/4656297
Calcul de la température équivalente selon le climat marocain et son effet sur le dimensionnement des chaussées
Creators: name: SARROUKH, Mouncif
name: LAHLOU, Khaled
name: FARAH, Mounia
name: MEQUEDADE, Nabil
name: BEN EL MAMOUNE, Mohammed
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: La température équivalente est l'un des paramètres les plus importants influençant la conception des chaussées bitumineuses. Elle est fonction de la variation de température au niveau des différentes couches de la chaussée ainsi que de l’évolution du trafic au cours d'une année donnée. L'objectif de cette étude est de calculer la température équivalente (θéq) d'un tronçon autoroutier au centre du Maroc. Ce calcul a été effectué en adoptant les caractéristiques des matériaux de la structure réelle de la chaussée et en utilisant les données météorologiques de la station la plus proche du site. Le modèle de Barber (1957) a permis d'estimer le profil de la température sur l’épaisseur de la chaussée. Le calcul de θéq basé sur les paramètres du site a montré une différence de 7 ° C avec la valeur utilisée à priori lors du dimensionnement initial. Une comparaison sur une durée de vie de 20 ans a montré que la conception basée sur la vraie θéq calculée se traduit par des économies importantes sur le coût global du tronçon d’autoroute en question.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
Aperçu sur les paramètres influençant le béton de sol et les approches permettant de prédire sa résistance mécanique
Creators: name: EL ASRI, Yousef
name: BEN AICHA, Mouhcine
name: ZAHER, Mounir
name: HAFIDI ALAOUI, Adil
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: Vu son faible impact environnemental et son attrait économique, l’amélioration des propriétés mécaniques d’un sol en le traitant en place avec un liant hydraulique (soil- mixing) a pris une place considérable dans le domaine de renforcement des sols. Ainsi, le béton de sol a fait l'objet de plusieurs études et discussions afin de déterminer les avantages de son utilisation sur chantier. À ce propos, ce présent travail analyse les paramètres influençant les propriétés physico-mécaniques du béton de sol. Il traitera par la suite les approches prédictives empiriques de la résistance mécanique en fonction des propriétés du sol. Enfin, des approches prédictives utilisant les techniques de l’intelligence artificielle seront abordées afin de mieux comprendre l’évolution de la résistance en fonction du type de sol rencontré.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech
Additional file 1 of Participatory model building for suicide prevention in Canada
Creators: name: Thompson, Laura H.
name: Lang, Justin J.
name: Brieanne Olibris
name: Gauthier-Beaupré, Amélie
name: Cook, Heather
name: Gillies, Dakota
name: Orpana, Heather
Publisher: name: figshare
Year: 2020
Subjects: subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy
subject: 111714 Mental Health
subject: FOS: Health sciences

description: Additional file 1: Table S1. Original list of risk and protective factor categories. Table S2. Original list of prevention lever categories.
Simulation expérimentale de la lixiviation des ouvrages hydrauliques en béton : impact de la concentration en ions calcium à flux continu
Creators: name: Gauthier, Aliénor
name: Kaddah, Farah
name: Hilloulin, Benoît
name: Rozière, Emmanuel
name: Loukili, Ahmed
Publisher: name: Academic Journal of Civil Engineering
Year: 2020

description: Le phénomène de lixiviation est toujours un problème d’actualité. Malgré le respect de la norme NF EN 206-1 (AFNOR, 2012) et des normes connexes relatives à la durabilité des ouvrages en béton, des dégradation significatives ont pu apparaître, notamment dans des usines de production d’eau potable. Ces réactions mettent en lumière le rôle important des ions calcium dans le phénomène étudié, paramètre non présent dans la norme actuelle. Le but de cette étude est d’étudier l’impact de la concentration en ions calcium de la solution agressive sur la lixiviation du béton. Des éprouvettes de mortier sont soumises à un essai de lixiviation à flux continu, pour garder les conditions aux limites constantes. Un suivi macroscopique des variations dimensionnelles a été réalisé, et des images à l’échelle microscopique ont été obtenues, de manière à étudier la microstructure.
description: Academic Journal of Civil Engineering, Vol 38 No 1 (2020): Special Issue - RUGC 2020 Marrakech