cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Non--Ergodicity Threshold: Time Scale for Magnetic Reversal
Creators: name: Celardo, G. L.
name: Barre, J.
name: Borgonovi, F.
name: Ruffo, S.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We prove the existence of a non-ergodicity threshold for an anisotropic classical Heisenberg model with all-to-all couplings. Below the threshold, the energy surface is disconnected in two components with positive and negative magnetizations respectively. Above, in a fully chaotic regime, magnetization changes sign in a stochastic way and its behavior can be fully characterized by an average magnetization reversal time. We show that statistical mechanics predicts a phase--transition at an energy higher than the non-ergodicity threshold. We assess the dynamical relevance of the latter for finite systems through numerical simulations and analytical calculations. In particular, the time scale for magnetic reversal diverges as a power law at the ergodicity threshold with a size-dependent exponent, which could be a signature of the phenomenon.
description: 4 pages 4 figures
K-Stacker, an algorithm to hack the orbital parameters of planets hidden in high-contrast imaging. First applications to VLT SPHERE multi-epoch observations
Creators: name: Coroller, H. Le
name: Nowak, M.
name: Delorme, P.
name: Chauvin, G.
name: Gratton, R.
name: Devinat, M.
name: Bec-Canet, J.
name: Schneeberger, A.
name: Estevez, D.
name: Arnold, L.
name: Beust, H.
name: Bonnefoy, M.
name: Boccaletti, A.
name: Desgrange, C.
name: Desidera, S.
name: Galicher, R.
name: Lagrange, A. M.
name: Langlois, M.
name: Maire, A. L.
name: Menard, F.
name: Vernazza, P.
name: Vigan, A.
name: Zurlo, A.
name: Fenouillet, T.
name: Lambert, J. C.
name: Bonavita, M.
name: Cheetham, A.
name: Dorazi, V.
name: Feldt, M.
name: Janson, M.
name: Ligi, R.
name: Mesa, D.
name: Meyer, M.
name: Samland, M.
name: Sissa, E.
name: Beuzit, J. L.
name: Dohlen, K.
name: Fusco, T.
name: Mignant, D. Le
name: Mouillet, D.
name: Ramos, J.
name: Rochat, S.
name: Sauvage, J. F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recent high-contrast imaging surveys, looking for planets in young, nearby systems showed evidence of a small number of giant planets at relatively large separation beyond typically 20 au where those surveys are the most sensitive. Access to smaller physical separations between 5 and 20 au is the next step for future planet imagers on 10 m telescopes and ELTs in order to bridge the gap with indirect techniques (radial velocity, transit, astrometry with Gaia). In that context, we recently proposed a new algorithm, Keplerian-Stacker, combining multiple observations acquired at different epochs and taking into account the orbital motion of a potential planet present in the images to boost the ultimate detection limit. We showed that this algorithm is able to find planets in time series of simulated images of SPHERE even when a planet remains undetected at one epoch. Here, we validate the K-Stacker algorithm performances on real SPHERE datasets, to demonstrate its resilience to instrumental speckles and the gain offered in terms of true detection. This will motivate future dedicated multi-epoch observation campaigns in high-contrast imaging to search for planets in emitted and reflected light. Results. We show that K-Stacker achieves high success rate when the SNR of the planet in the stacked image reaches 7. The improvement of the SNR ratio goes as the square root of the total exposure time. During the blind test and the redetection of HD 95086 b, and betaPic b, we highlight the ability of K-Stacker to find orbital solutions consistent with the ones derived by the state of the art MCMC orbital fitting techniques, confirming that in addition to the detection gain, K-Stacker offers the opportunity to characterize the most probable orbital solutions of the exoplanets recovered at low signal to noise.
description: Astronomy & Astrophysics accepted, 13 Pages, 11 Figures
AGENTES Y MÁRGENES DE COMERCIALIZACIÓN DEL GANADO BOVINO PARA ABASTO EN LOMA BONITA, OAXACA
Creators: name: Martínez Castro, César Julio
name: Cotera Rivera, Julián
name: Arceo Merales, Osiris Lizzeth
name: Forsythe, Eric Damien
name: Kido Cruz, Ma. Teresa
name: Martínez Castro, César Julio
name: Cotera Rivera, Julián
name: Arceo Merales, Osiris Lizzeth
name: Forsythe, Eric Damien
name: Kido Cruz, Ma. Teresa
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: Dual-purpose cattle
subject: culled cattle
subject: marketing agents
subject: gross marketing margin
subject: direct participation of the producer.

description: This work had two objectives: 1) identify and characterize the participating agents in the marketing process of cattle destined for slaughter in the city of Loma Bonita, Oaxaca, and determine the Gross Marketing Margin (GMM) and the Direct Participation of the Producer (DPP) in said process. We identified three direct agents (producer, butcher, and consumer) and an indirect agent (municipal abattoir). We designed a questionnaire for each agent and administered them to 120 producers, 18 butchers, 270 consumers, and one to the manager of the municipal abattoir. The results show that the Direct Participation of the Producer (DPP) is only 23.6% and the Gross Marketing Margin (GMM) obtained by the butchers is 76.4%. We concluded that economic and cultural factors play an important role in the existence of a market that demands beef from culled cattle since the consumer in Loma Bonita, Oaxaca prefers fresh meat over the frozen meat which is sold by local supermarkets.
On Stochastic Evolutions and Superconformal Field Theory
Creators: name: Nagi, Jasbir
name: Rasmussen, Jorgen
Publisher: name: arXiv
Year: 2004
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Links between certain stochastic evolutions of conformal maps and conformal field theory have been studied in the realm of SLE and by utilizing singular vectors in highest-weight modules of the Virasoro algebra. It was recently found that this scenario could be extended to stochastic evolutions of superconformal maps of N=1 superspace with links to superconformal field theory and singular vectors of the N=1 superconformal algebra in the Neveu-Schwarz sector. Here we discuss the analogous extension to the Ramond sector. We also discuss how the links are modified when an unconventional superconformal structure or superderivative is employed.
description: LaTeX2e, 15 pages
3100: Ernest Hobson, Prisoner of War
Creators: name: Project Team, Lest We Forget
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: Ernest Hobson joined the 2/5 West Yorkshire Regiment. He was taken a POW after being captured in a pill box. He was at Lager Giessen from 27.3.1918 until the end of the war. He was well treated in the camp and sometimes the prisoners had more to eat than the guards due to the Red Cross parcels.
ANÁLISIS DE RENTABILIDAD DE LA TUNA EN LOS MUNICIPIOS DE NOPALTEPEC Y AXAPUSCO, ESTADO DE MÉXICO
Creators: name: Ramírez Abarca, Orsohe
name: Figueroa Hernández, Esther
name: Espinosa Torres, Luis Enrique
name: Ramírez Abarca, Orsohe
name: Figueroa Hernández, Esther
name: Espinosa Torres, Luis Enrique
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agribusiness
subject: Tuna
subject: production
subject: profitability
subject: producers.

description: The prickly pear is a product with origin in Latin America and that was led by the conquerors to other continents that were eligible for cultivation. Mexico has the highest diversity and abundance of species (around 80) and prickly pear cultivars worldwide, so it is regarded as a center of origin and spread of the plant. The production potential of this crop is due to the wealth of genetic material, to the surface dedicated to do so and the many climates where the ground has been established. By 2010, in Mexico there were 415,086 tons, particularly in the State of Mexico, it accounted for 43.0% of national production. The study was conducted in the municipalities of Nopaltepec and Axapusco that are located in the Orient region of the state. The methodological tool which was used for the analysis of profitability is the Policy Analysis Matrix (PAM), in order to quantify the profitability of the tuna production in the affected municipalities. The results obtained show that the producers were profitable production for the 2011 production cycle, production units Nopaltepec do a better management of orchards Axapusco producers, therefore, have higher incomes as well as make greater investments activities also. It generated a significant economic benefit in the purchase of tradable inputs and domestic factors where manual labor is the most important, so the fruit is very demanding labor by the nature of the process of obtaining the product.
3121: Tom Thorpe
Creators: name: Project Team, Lest We Forget
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: Tom Thorpe was a driver and lived in Ilkley. He was in 245 battery 4th West Yorks which became 245 brigade in 1915/16. He served throughout the war: April 1915 - 1919. The battery had few casualties in the war possibly because they were further from the frontline. He came home for Christmas in 1918/19 and camped at Folkestone. In Jan 1919 they protested about having to go back to France and eventually they were sent home.
SOCIO-ECONOMIC FACTORS AND ADOPTION O FENERGY CROPS
Creators: name: Gedikoglu, Haluk
name: Gedikoglu, Haluk
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agricultural and Food Policy
subject: Political Economy
subject: Production Economics
subject: Productivity Analysis
subject: Resource /Energy Economics and Policy
subject: Bioenergy
subject: Cellulosic Ethanol
subject: Switchgrass
subject: Miscanthus
subject: Technology Adoption

description: Current study analyzes the socio-economic factors that impact farmers’ willingness to grow switchgrass and miscanthus in Missouri and Iowa. The results of the current study show that current level of farmers’ willingness to grow for either crop is low. Hence, there are barriers to accomplishing the goal of producing 21 billion gallons of cellulosic biofuel by 2022. It is also found that currently growing energy crops is more attractive to small farms as a source of crop diversification, rather than an alternative crop production system in the big scale by large farms.
Marketing models of entertainment products
Creators: name: Ho, Yiu Chung
Publisher: name: University of British Columbia
Year: 2009

description: Television broadcasts of major events like the Super Bowl command extremely high advertising rates. It is important to evaluate the value created by this advertising tactic. The first essay develops a marketing model that illustrates a direct and an indirect effect path created by Super Bowl TV advertising in the movie industry. First, via the direct path, Super Bowl advertising directly increases initial theatrical demand for a movie. Second, through the indirect path, Super Bowl advertising first encourages more exhibitors to screen a movie, then this increased exhibition rate in turn increases initial box office revenue. Four variants of the marketing model are explored in the attempt to capture the non-linearity of the two paths and other control variables' effects. Three main results are obtained. First, Super Bowl advertising is demonstrated to affect opening box office revenues positively. Second, this positive effect occurs mainly through the indirect path, establishing the mediating role of movie exhibitors. Third, compared to other TV advertising efforts, Super Bowl advertising appears less effective if both efforts are evaluated at the same initial level. However, at current spending levels, Super Bowl advertising can still be justified. Many entertainment service providers serve customers according to pre-announced schedules, and the timing factor can be as important as price and service quality in determining consumer demand. The second essay develops three demand models to characterize the effects of different service start times in a multiplex movie theater context. The models address two recurring issues, namely the confounding of product quality and time preference in aggregated sales data, and the difficulty of distinguishing between cannibalization and market expansion. Meaningful results are obtained by applying the models to two data sets of admission records from a multiplex movie theater in Amsterdam. First, one of the data sets is demonstrated to exhibit confounding of unobserved movie quality and moviegoers' underlying time preference, establishing the value of the demand models in disentangling these two effects in the aggregated sales data. Second, the effectiveness of the models in comparison to previous models is demonstrated in the process of discerning between cannibalization and market expansion.
Cosmic Microwave Background Anisotropies: Beyond Standard Parameters
Creators: name: Trotta, Roberto
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In the first part of this work, I review the theoretical framework of cosmological perturbation theory necessary to understand the generation and evolution of cosmic microwave background (CMB) anisotropies. Using analytical and numerical techniques, in the second part I describe the impact on the CMB power spectra of the standard cosmological parameters (such as the matter-energy budget of the Universe, its curvature, the amplitude and spectral properties of the primordial fluctuations, etc.). I introduce the most general type of initial conditions for the primordial perturbations, deriving a new analytical approximation for the neutrino isocurvature modes. In the third part, I discuss the issue of extracting constraints on the parameters of interest from the recent, high-quality CMB measurements, presenting the relevant statistical tools and focusing on the Fisher matrix analysis as a technique to produce reliable forecasts for the performance of future observations. I then apply those tools to the study of several possible extensions of the (currently) standard Lambda CDM model: the presence of extra relativistic particles, possible time variations of the fine structure constant, and the value of the primordial Helium mass fraction. I also use the CMB as a tool to study the very early Universe, via its dependence on the type of initial conditions: I relax the assumption of purely adiabatic initial conditions and discuss the observational consequences and constraints on the presence of general isocurvature modes.
description: PhD thesis, 231 pages, 50+ low resolution figures to comply with arXiv restrictions. Higher resolution version available from http://mpej.unige.ch/~trotta/html/thesis.htm
Entanglement dynamics in dissipative photonic Mott insulators
Creators: name: Donatella, Kaelan
name: Biella, Alberto
name: Boité, Alexandre Le
name: Ciuti, Cristiano
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We theoretically investigate the entanglement dynamics in photonic Mott insulators in the presence of particle losses and dephasing. We explore two configurations where entanglement is generated following the injection or extraction of a photon in the central site of a chain of cavity resonators. We study the entanglement negativity of two-site reduced density matrices as a function of time and inter-site distance. Our findings show that in spite of particle losses the quantum entanglement propagation exhibits a ballistic character with propagation speeds related to the differerent quasiparticles that are involved in the dynamics, namely photonic doublons and holons respectively. Our analysis reveals that photon dissipation has a strikingly asymmetric behavior in the two configurations with a much more dramatic role on the holon entanglement propagation than for the doublon case.
description: 4 figures
ROLE AND EFFECT OF AGROFORESTY SUBSIDES ALLOCATED BY THE COMMON AGRICULTURAL POLICY IN ITALIAN FARMS
Creators: name: Galluzzo, Nicola
name: Galluzzo, Nicola
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agricultural and Food Policy
subject: Agricultural Finance
subject: Community/Rural/Urban Development
subject: Crop Production/Industries
subject: Common Agricultural Policy
subject: rural areas
subject: multiple regression model
subject: FADN
subject: Rural Development Plans.

description: Since the early 1990s, the European Union has financed a lot of specific measures aimed at promoting agroforestry on farms. In fact, the reform of Common Agricultural Policy proposed by the European Commissioner Ray MacSharry has put in place several actions with the predominant aim of changing the European agricultural model based on an environmental protection instead of a growth of agrarian productions. The purpose of this paper was, using a multiple regression model, to assess the impact of the Common Agricultural Policy, specifically financial subsides allocated by the second pillar of the CAP, in promoting agroforestation actions on the overall output of farmers over the time 2004-2012 and on the growth of woodland surface. Findings have pointed out a positive correlation between financial support paid by the Rural Development Program and the farmer total income with positive consequences on the growth of afforestated surfaces particularly in lowland areas.
3054: Charles McCann
Creators: name: Project Team, Lest We Forget
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: Charles McCann served with the East Lancs Regiment from 1902-5. He then went into the reserves before being recalled in 1914. He received the 1914 star. He wrote a diary of his time in France. He was in the Battle of Mons and subsequent retreat. At some point he was gassed and then transferred into another regiment - maybe Worcs. He later transferred to the Hamps Regiment. He was a sergeant in the Worcester Regiment - 49465. He was discharged in 1919. He was a postman in Bradford.
uvby-Hbeta CCD Photometry of NGC 1817 and NGC 1807
Creators: name: Balaguer-Nunez, L.
name: Jordi, C.
name: Galadi-Enriquez, D.
name: Masana, E.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have investigated the area of two NGC entries, NGC 1817 and NGC 1807, with deep CCD photometry in the uvby-Hbeta intermediate-band system. The photometric analysis of a selected sample of stars of the open cluster NGC 1817 yields a reddening value of E(b-y)= 0.19$\pm$0.05, a distance modulus of V0-MV= 10.9$\pm$0.6, a metallicity of [Fe/H]= -0.34$\pm$0.26 and an age of log t = 9.05$\pm$0.05. Our measurements allow us to confirm that NGC 1807 is not a physical cluster.
description: 11 pages, 8 figures, A&A in press
SPILLOVER EFFECTS OF U.S. FEDERAL RESERVE’S RECENT QUANTITATIVE EASING ON CANADIAN COMMODITY PRICES
Creators: name: Saghaian, Sayed
name: Reed, Michael
name: Saghaian, Sayed
name: Reed, Michael
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agricultural Finance
subject: Crop Production/Industries
subject: Political Economy
subject: Quantitative easing
subject: Canadian agricultural commodity prices
subject: spillover effects
subject: historical decomposition graphs

description: In this study, we evaluate the spillover effects of the recent U.S. Federal Reserve’s purchase of long-term assets (quantitative easing) on prices of Canadian commodities. The first large-scale asset purchases happened after the Great Recession, at the end of 2008, and the second purchases were in November of 2010. Since the U.S. is a large country, those policies have international spillover effects, particularly on Canada, a major economic partner. The commodities included in this analysis are Canadian livestock (cattle, hogs, and poultry), cereal grains (corn, soybeans, and wheat), softs (sugar, coffee, and cocoa), and energy (crude oil and natural gas). Using historical decomposition graphs, we find significant spillover effects on the Canadian commodity prices under investigation in the immediate neighborhood (seven-month horizon) of the large-scale asset purchases, especially the second round of quantitative easing.
Implementation of quantum imaginary-time evolution method on NISQ devices: Nonlocal approximation
Creators: name: Nishi, Hirofumi
name: Kosugi, Taichi
name: Matsushita, Yu-ichiro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The imaginary-time evolution method is widely known to be efficient for obtaining the ground state in quantum many-body problems on a classical computer. A recently proposed quantum imaginary-time evolution method (QITE) faces problems of deep circuit depth and difficulty in the implementation on noisy intermediate-scale quantum (NISQ) devices. In this study, a nonlocal approximation is developed to tackle this difficulty. We found that by removing the locality condition or local approximation (LA), which was imposed when the imaginary-time evolution operator is converted to a unitary operator, the quantum circuit depth is significantly reduced. We propose two-step approximation methods based on a nonlocality condition: extended LA (eLA) and nonlocal approximation (NLA). To confirm the validity of eLA and NLA, we apply them to the max-cut problem of an unweighted 3-regular graph and a weighted fully connected graph; we comparatively evaluate the performances of LA, eLA, and NLA. The eLA and NLA methods require far fewer circuit depths than LA to maintain the same level of computational accuracy. Further, we developed a ``compression'' method of the quantum circuit for the imaginary-time steps as a method to further reduce the circuit depth in the QITE method. The eLA, NLA, and the compression method introduced in this study allow us to reduce the circuit depth and the accumulation of error caused by the gate operation significantly and pave the way for implementing the QITE method on NISQ devices.
description: 9 pages, 3figures
THE POTENTIAL IMPACTS OF THE PORT OF SALVADOR IMPROVEMENTS ON THE BRAZILIAN COTTON INDUSTRY
Creators: name: Costa, Rafael
name: Rosson, Parr
name: Costa, Ecio De Farias
name: Costa, Rafael
name: Rosson, Parr
name: Costa, Ecio De Farias
Publisher: name: Unknown
Year: 2015
Subjects: subject: Agricultural and Food Policy
subject: Community/Rural/Urban Development
subject: Crop Production/Industries
subject: International Relations/Trade
subject: Production Economics
subject: Cotton
subject: international trade
subject: Brazil
subject: spatial equilibrium model
subject: transportation

description: A spatial price equilibrium model of the international cotton sector was used to analyze the impacts of the Port of Salvador improvements on the Brazilian cotton industry and world cotton trade. The port of Salvador is undergoing relevant improvements in its facilities and physical structure. As a result of these improvements, the port of Salvador is expected to become more competitive and attract ocean shipping companies which are willing to export products directly to Asian importing markets. Scenarios with different reduction in export cost for the port of Salvador were examined. For all scenarios, the new direct ocean shipping lines were found to be important for the cotton exporters in Brazil, especially for the producers in the state of Bahia. In addition, results suggested that the state of Bahia would have the potential of becoming the largest cotton exporting state in Brazil.
Spin-asymmetry energy of nuclear matter
Creators: name: Kaiser, N.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We calculate the density-dependent spin-asymmetry energy $S(k_f)$ of isospin-symmetric nuclear matter in the three-loop approximation of chiral perturbation theory. The interaction contributions to $S(k_f)$ originate from one-pion exchange, iterated one-pion exchange, and (irreducible) two-pion exchange with no, single, and double virtual $Δ$-isobar excitation. We find that the truncation to $1π$-exchange and iterated $1π$-exchange terms (which leads already to a good nuclear matter equation of state) is spin-unstable, since $S(k_{f0})<0$. The inclusion of the chiral $πNΔ$-dynamics guarantees the spin-stability of nuclear matter. The corresponding spin-asymmetry energy $S(k_f)$ stays positive within a wide range of an undetermined short-range parameter $S_5$ (which we also estimate from realistic NN-potentials). Our results reemphasize the important role played by two-pion exchange with virtual $Δ$-isobar excitation for the nuclear matter many-body problem. Its explicit inclusion is essential in order to obtain good bulk and single-particle properties.
description: 11 pages, 6 figuers, accepted for publication in Physical Review C
Optimizing the photoassociation of cold atoms by use of chirped laser pulses
Creators: name: Luc-Koenig, Eliane
name: Vatasescu, Mihaela
name: Masnou-Seeuws, Francoise
Publisher: name: arXiv
Year: 2004
Subjects: subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Photoassociation of ultracold atoms induced by chirped picosecond pulses is analyzed in a non-perturbative treatment by following the wavepackets dynamics on the ground and excited surfaces. The initial state is described by a Boltzmann distribution of continuum scattering states. The chosen example is photoassociation of cesium atoms at temperature T=54 $μK$ from the $a^3 Σ_u^+(6s,6s)$ continuum to bound levels in the external well of the $0_g^-(6s+6p_{3/2})$ potential. We study how the modification of the pulse characteristics (carrier frequency, duration, linear chirp rate and intensity) can enhance the number of photoassociated molecules and suggest ways of optimizing the production of stable molecules.
description: 40 pages, 12 figures, submitted to Eur. Phys. J. D
D3.6: Quantum Dynamics E-CAM modules V
Creators: name: Ahai Chen
name: Et Al.
Publisher: name: Zenodo
Year: 2021

description: In this report for Deliverable 3.6 of E-CAM, 6 software modules in quantum dynamics are presented. All modules stem from the activities initiated during the SAW held at Lyon (France) in June 2019 and the workshop ESDW: Quantum Dynamics, held at Durham University (UK) in July 2019. The modules originate from the input of E-CAM’s academic user base. They have been developed by members of the project (S. Bonella EPF-L), established collaborators (G. Worth University College London, S. Gomez University of Vienna, C. Sanz University of Madrid, D. Lauvergnat Paris-Saclay University, F. Agostini Paris-Saclay University), E-CAM post-doc (A. Chen CEA-Saclay) and new contributors to the E-CAM repository (M. Heindl University of Vienna, K. Parsons Dalhousie University, T. Tran University College London). The presence of new contributors indicates the interest of the community in our efforts. Furthermore, the contributors to modules in WP3 continue to be at different stages of their careers (in particular, K. Parsons, T. Tran, and M. Heindl are PhD students) highlighting the training value of our activities. Following the order of presentation, the 6 modules are named: G-CTMQC, FBTS-MPI, Quantics DD-vMCG MPI/OMP, SHARC-gym, ElVibRot-TID-MPI, and ElVibRot-TD-MPI. In this report, a short description is written for each module, followed by a link to the respective Merge-Request document on the GitLab service of E-CAM. These merge requests contain detailed information about the code development, testing and documentation of the modules. As this deliverable is the last one of its series, a section on the overall impact of the results achieved within the Workpackage Quantum Dynamics was also included, with an overview of the results achieved so far, how these have been disseminated in scientific publications, the industrial impact of the software developed, the training given in the WP which has led to many of the software outputs, and the societal impact of the WP.
When are Private Standards more Stringent than Public Standards?
Creators: name: Vandemoortele, Thijs
name: Vandemoortele, Thijs
Publisher: name: Unknown
Year: 2011
Subjects: subject: Resource /Energy Economics and Policy
subject: Private Standards
subject: Public Standards
subject: Political Economy

description: Retailers’ private standards are increasingly important in addressing consumer concerns about safety, quality and social and environmental issues. Empirical evidence shows that these private standards are frequently more stringent than their public counterparts. I develop a political economy model that may contribute to explaining this stylized fact. I show that if producers exercise their political power to persuade the government to impose a lower public standard, retailers may apply their market power to install a private standard at a higher level than the public one.
Spectral Wave Explicit Navier-Stokes Equations for wave-structure interactions using two-phase Computational Fluid Dynamics solvers
Creators: name: Li, Zhaobin
name: Bouscasse, Benjamin
name: Ducrozet, Guillaume
name: Gentaz, Lionel
name: Touzé, David Le
name: Ferrant, Pierre
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: This paper proposes an efficient potential and viscous flow decomposition method for wave-structure interaction simulation with single-phase potential flow wave models and two-phase Computational Fluid Dynamics (CFD) solvers. The potential part - represents the incident waves - is solved with spectral wave models; the viscous part - represents the complementary perturbation on the incident waves - is solved with the CFD solver. This combination keeps the efficiency and accuracy of potential theory on water waves and the advantage of two-phase CFD solvers on complex flows (wave breaking, flow separation, etc.). The decomposition strategy is called Spectral Wave Explicit Navier-Stokes Equations (SWENSE), originally proposed for single-phase CFD solvers. Firstly, this paper presents an extension of the SWENSE method for two-phase CFD solvers. Secondly, an accurate and efficient method to interpolate potential flow results obtained with the High Order Spectral (HOS) wave model on CFD mesh is proposed. The method is able to reduce the divergence error of the interpolated velocity field to meet the CFD solver's needs without reprojection. Implemented within OpenFOAM, these methods are tested by three convincing verification, validation and application cases, considering incident wave propagation, high-order loads on a vertical cylinder in regular waves, and a Catenary Anchor Leg Mooring (CALM) buoy in both regular and irregular waves. Speed-ups between 1.71 and 4.28 are achieved with the test cases. The wave models and the interpolation method are released open-source to the public.
3075: Corporal Maurice Fredrick Topham
Creators: name: Project Team, Lest We Forget
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: Corporal Maurice Fredrick Topham (b. 27.7.1898) trained at Raikeswood Camp, Skipton as part of the 6th Battalion West Yorkshire Regiment. He went to France as replacement for the Highland Light Infantry. He was killed in action on 29/9/1918 when with 9th Battalion HLI. He is buried at Targelle Ravine Cemetery, Villiers Guislan, France. There is a photo of his original grave marker. His parents visited the grave around 1922 hence the need for a passport.
Potential theory for hyperbolic SPDEs
Creators: name: Dalang, Robert C.
name: Nualart, Eulalia
Publisher: name: arXiv
Year: 2004
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60H15, 60J45 (Primary) 60H07, 60G60. (Secondary)

description: We give general sufficient conditions which imply upper and lower bounds for the probability that a multiparameter process hits a given set E in terms of a capacity of E related to the process. This extends a result of Khoshnevisan and Shi [Ann. Probab. 27 (1999) 1135-1159], where estimates for the hitting probabilities of the (N,d) Brownian sheet in terms of the (d-2N) Newtonian capacity are obtained, and readily applies to a wide class of Gaussian processes. Using Malliavin calculus and, in particular, a result of Kohatsu-Higa [Probab. Theory Related Fields 126 (2003) 421-457], we apply these general results to the solution of a system of d nonlinear hyperbolic stochastic partial differential equations with two variables. We show that under standard hypotheses on the coefficients, the hitting probabilities of this solution are bounded above and below by constants times the (d-4) Newtonian capacity. As a consequence, we characterize polar sets for this process and prove that the Hausdorff dimension of its range is min(d,4) a.s.
description: Published by the Institute of Mathematical Statistics (http://www.imstat.org) in the Annals of Probability (http://www.imstat.org/aop/) at http://dx.doi.org/10.1214/009117904000000685
Can CFD Analysis Help PEM Fuel Cell Design and Operation?
Creators: name: Al-Baghdadi, Maher
Publisher: name: figshare
Year: 2020
Subjects: subject: 90607 Power and Energy Systems Engineering (excl. Renewable Power)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: CFD technology can be efficiently employed to analyze and develop a deeper understanding of the complex interaction between the PEM fuel cell components and the processes that occur inside it, that would be not possible by experimental techniques alone. There are some interesting and promising new results using CFD technology in PEM fuel cell development, that have been explored particularly for what concerns: innovative designs, innovative algorithm, maximum power and long cell life, air breathing PEM fuel cells, micro PEM fuel cells, micro air breathing PEM fuel cells, mechanical and hygro-thermal stresses in the PEM fuel cells, natural vibration of the PEM fuel cell stacks, and integrated PEM fuel cells. These innovative improvements will show a new scenario for the future fuel cell market of the next years.
Velocity autocorrelations across the molecular-atomic fluid transformation in hydrogen under pressure
Creators: name: Ruocco, G.
name: Bryk, T.
name: Pierleoni, C.
name: Seitsonen, A. P.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Non-monotonous changes in velocity autocorrelations across the transformation from molecular to atomic fluid in hydrogen under pressure are studied by ab initio molecular dynamics simulations at the temperature 2500 K. We report diffusion coefficients in a wide range of densities from purely molecular fluid up to metallic atomic fluid phase. An analysis of contributions to the velocity autocorrelation functions from the motion of molecular centers-of-mass, rotational and intramolecular vibrational modes is performed, and a crossover in the vibrational density of intramolecular modes across the transition is discussed.
description: 7 pages, 5 figures
Local copying of orthogonal entangled quantum states
Creators: name: Anselmi, Fabio
name: Chefles, Anthony
name: Plenio, Martin B.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In classical information theory one can, in principle, produce a perfect copy of any input state. In quantum information theory, the no cloning theorem prohibits exact copying of nonorthogonal states. Moreover, if we wish to copy multiparticle entangled states and can perform only local operations and classical communication (LOCC), then further restrictions apply. We investigate the problem of copying orthogonal, entangled quantum states with an entangled blank state under the restriction to LOCC. Throughout, the subsystems have finite dimension D. We show that if all of the states to be copied are non-maximally entangled, then novel LOCC copying procedures based on entanglement catalysis are possible. We then study in detail the LOCC copying problem where both the blank state and at least one of the states to be copied are maximally entangled. For this to be possible, we find that all the states to be copied must be maximally entangled. We obtain a necessary and sufficient condition for LOCC copying under these conditions. For two orthogonal, maximally entangled states, we provide the general solution to this condition. We use it to show that for D=2,3, any pair of orthogonal, maximally entangled states can be locally copied using a maximally entangled blank state. However, we also show that for any D which is not prime, one can construct pairs of such states for which this is impossible.
description: 13 pages. Journal ref. New. J. Phys., Vol. 6, p. 164 (2004)
2799: Private Matthew Raper
Creators: name: Project Team, Lest We Forget
Publisher: name: University of Oxford
Year: 2024
Subjects: classificationCode: 430304
subject: British history
classificationCode: 430308
subject: European history (excl. British, classical Greek and Roman)
classificationCode: 430316
subject: International history

description: Private Matthew Raper joined up in Bradford. He served with the 10th Battalion West Yorks and died on 8.8.1918. He is buried in Quarry Cemetery, Montauban, France.
The role of insulin-like growth factor-I (IGF-I) in cerebral cortex development
Creators: name: Hodge, Rebecca D.
Publisher: name: University of British Columbia
Year: 2009

description: The in vivo actions of insulin-like growth factor-I (IGF-I) on the embryonic and early postnatal development of the cerebral cortex were investigated in a line of transgenic mice that overexpress IGF-I in the brain under the control of regulatory sequences from the nestin gene. Transgene expression in these mice, designated nestin/IGF-I transgenics, begins by as early as embryonic day (E) 13 and continues into postnatal life, with the highest levels of expression detected in the cerebral cortex. To determine the effect of elevated IGF-I expression on cortex development, stereological analyses were conducted by light microscopy at postnatal day (P) 12. These analyses revealed a 31% increase in the total volume of the cerebral cortex and a corresponding 27% increase in the total number of cortical neurons in transgenic mice as compared to normal littermate controls. To investigate the mechanisms by which IGF-I overexpression promotes increased neuron number in nestin/IGF-I transgenic mice, an analysis of the cell cycle kinetics of neuron progenitors in the cerebral wall was conducted at E14, the approximate midpoint of cortical neurogenesis in normal mice (El 1-E17). The lengths of the total cell cycle and all individual phases ( G l , S, G2, and M) were measured in transgenic and control embryos. Total cell cycle length was decreased by 2.05 hr in transgenic embryos, due entirely to a reduction in G l phase length. Analyses conducted to measure the proportion of cells exiting the cell cycle on E14-E15 revealed a 15% decrease in the exiting fraction of cells in transgenic embryos. A corresponding 27% increase in the proportion of Tbr2-positive intermediate progenitor cells was noted in the cerebral wall of transgenic embryos on E14. The anti-apoptotic actions of IGF-I in the cortex were assessed during early postnatal development, at P0 and P5. A significant decrease (31-39%) in the numerical density of apoptotic neurons in the cortex was documented in transgenic mice at these ages. Taken together, the results of the present set of experiments indicate that IGF-I acts both to promote neuron progenitor proliferation and to decrease neuron death by apoptosis in the developing cerebral cortex.
Four-wave mixing in Weyl semimetals
Creators: name: Almutairi, Sultan
name: Chen, Qianfan
name: Tokman, Mikhail
name: Belyanin, Alexey
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Weyl semimetals (WSMs) have unusual optical response originated from unique topological properties of their bulk and surface electron states. Their third-order optical nonlinearity is expected to be very strong, especially at long wavelengths, due to linear dispersion and high Fermi velocity of three-dimensional Weyl fermions. Here we derive the third-order nonlinear optical conductivity of WSMs in the long-wavelength limit and calculate the intensity of the nonlinear four-wave mixing signal as it is transmitted through the WSM film or propagates away from the surface of the material in the reflection geometry. All results are analytic and show the scaling of the signal intensity with variation of all relevant parameters. The nonlinear generation efficiency turns out to be surprisingly high for a lossy material, of the order of several mW per W$^3$ of the incident pump power. Optimal conditions for maximizing the nonlinear signal are realized in the vicinity of bulk plasma resonance. This indicates that ultrathin WSM films of the order of skin depth in thickness could find applications in compact optoelectronic devices.
description: 18 pages, 8 figures
Integer Polynomial Optimization in Fixed Dimension
Creators: name: De Loera, Jesús A.
name: Hemmecke, Raymond
name: Köppe, Matthias
name: Weismantel, Robert
Publisher: name: arXiv
Year: 2004
Subjects: subject: Optimization and Control (math.OC)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 90C10, 90C30, 90C60, 90C57

description: We classify, according to their computational complexity, integer optimization problems whose constraints and objective functions are polynomials with integer coefficients and the number of variables is fixed. For the optimization of an integer polynomial over the lattice points of a convex polytope, we show an algorithm to compute lower and upper bounds for the optimal value. For polynomials that are non-negative over the polytope, these sequences of bounds lead to a fully polynomial-time approximation scheme for the optimization problem.
description: In this revised version we include a stronger complexity bound on our algorithm. Our algorithm is in fact an FPTAS (fully polynomial-time approximation scheme) to maximize a non-negative integer polynomial over the lattice points of a polytope
Relaxation rate of RNdS black hole
Creators: name: Zhang, Ming
name: Jiang, Jie
name: Zhong, Zhen
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We investigate the relaxation rate of the RNdS black hole perturbed by neutral massless scalar field in the eikonal limit. We find that the fastest relaxation rate of the composed system increases with the cosmological constant for all spacetime dimensions. We also find that, when the cosmological constant decreases from maximum value to zero, the corresponding critical charge of the four-dimensional RNdS black hole maximizing the relaxation rate of the composed system gradually decreases monotonically to $\bar{Q}=0.726$. However, for the higher dimensional systems, this is not the case and the critical charges decrease from maximum to zero.
description: 8 pages, to appear in PLB
title: Efficient process mapping for cartesian topologies
Creators: name: Lehr, Markus
Publisher: name: TU Wien
Year: 2019
Subjects: subject: Parallel, distributed memory computing
subject: High-Performance computing
subject: Process mapping
subject: Communication patterns
subject: Grids
subject: Stencils
subject: MPI
subject: Parallel, distributed memory computing
subject: High-Performance computing
subject: Process mapping
subject: Communication patterns
subject: Grids
subject: Stencils
subject: MPI

description: In this thesis we introduce different algorithms for mapping physical processes to Cartesian grids. We assume that processes within this grid communicate with certain neighboring processes as defined by a given stencil. We show that this mapping problem is already NP-complete for two dimensional grids and a very simple isomorphic neighborhood. We compare the current state of solutions in the field of High Performance Computing, specifically the Message Passing Interface (MPI). With his algorithm from 2018, W. D. Gropp showed promising performance, which is why we compare our approaches to his work, as well as MPI's standard behaviour. For qualitatively comparing concrete mappings, we define fitting optimality criteria, based on the core concept of minimizing inter-computation-node communication. We benchmarked using MPI_Irecv and MPI_Isend and show that our algorithms can find mappings, where Gropp cannot and that we could match or improve upon his resulting mappings in terms of quality and runtime. The first algorithm, which we present is similar to other graph partitioning approaches, since it utilizes recursive splitting in order to guarantee a logarithmic runtime wrt. the number of vertices in the Cartesian grid. We also guarantee a quality bound for this algorithm, which becomes better with increasing number of dimensions. In another implementation-variant, we adapted this algorithm for accommodating differently shaped stencils by weighting dimensions before the recursive splitting depending on how much communication happens across them. The third approach attempts to find hyperrectangular strips within the Cartesian grid, which are then filled similar to MPI's default row-major rank assignment. Although the theoretical bound of this approach is not as good as the first, this assignment strategy yielded the most compact mappings most of the time. Its main shortcoming, however, is its inability to adapt these strips, depending on different stencils.