cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Higher order topological matter and fractional chiral states
Creators: name: Drissi, L. B.
name: Lounis, S.
name: Saidi, E. H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Mathematical Physics (math-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We develop a chiral anomalous fermion hamiltonian proposal to study the higher order topological (HOT) phase with chiral symmetry $\mathcal{C}$ fractionalized like $\mathcal{C}_{x}\mathcal{C}_{y}\mathcal{C}_{z}$. First, we solve the $\mathcal{C}$-chiral symmetry constraint for eight band models and describe those induced by the partial $\mathcal{C}_{i}$'s. Then, we determine the explicit expression of fractional states characterising HOT matter and comment on the relationships amongst them and with the standard Altland-Zirnbauer gapless modes. We also give characteristic properties of the gapless fractional states and compute their contribution to the topological index of the chiral model. The findings of this work are shown to be crucial for investigating and handling high order topological phase.
description: 18 PAGES, 3 Figures
Hydrodynamic simulations of classical novae; CO and ONe white dwarfs are supernova ia progenitors
Creators: name: Bose, M.
name: Starrfield, S.
name: Hix, W.R.
name: Wagner, R.M.
name: Iliadis, C.
name: Woodward, C.E.
Publisher: name: Sissa Medialab Srl
Year: 2021

description: Cataclysmic Variables (CVs) and Symbiotic Binaries are close (or not so close) binary star systems which contain both a white dwarf (WD) primary and a larger cooler secondary star that typically fills its Roche Lobe. The cooler star is losing mass through the inner Lagrangian point of the binary and a fraction of this material is accreted by the WD. Here we report on our hydrodynamic studies of the thermonuclear runaway (TNR) in the accreted material that ends in a Classical Nova explosion. We have followed the evolution of the TNRs on both carbon-oxygen (CO) and oxygen-neon (ONe) WDs. We report on 3 studies in this paper. First, simulations in which we accrete only solar matter using NOVA (our 1-D, fully implicit, hydro code). Second, we use MESA for similar studies in which we accrete only Solar matter and compare the results. Third, we accrete solar matter until the TNR is ongoing and then switch the composition in the accreted layers to a mixed composition: either 25% WD and 75% solar or 50% WD and 50% Solar. We find that the amount of accreted material is inversely proportional to the initial 12C abundance (as expected). Thus, accreting solar matter results in a larger amount of accreted material to fuel the outburst; much larger than in earlier studies where a mixed composition was assumed from the beginning of the simulation. Our most important result is that all these simulations eject significantly less mass than accreted and, therefore, the WD is growing in mass toward the Chandrasekhar Limit.
Dark Matter from Late Invisible Decays to/of Gravitinos
Creators: name: Allahverdi, Rouzbeh
name: Dutta, Bhaskar
name: Queiroz, Farinaldo S.
name: Strigari, Louis E.
name: Wang, Mei-Yu
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this work, we sift a simple supersymmetric framework of late invisible decays to/of the gravitino. We investigate two cases where the gravitino is the lightest supersymmetric particle or the next-to-lightest supersymmetric particle. The next-to-lightest supersymmetric particle decays into two dark matter candidates and has a long lifetime due to gravitationally suppressed interactions. However, because of the absence of any hadronic or electromagnetic products, it satisfies the tight bounds set by big bang nucleosynthesis and cosmic microwaved background. One or both of the dark matter candidates produced in invisible decays can contribute to the amount of dark radiation and suppress perturbations at scales that are being probed by the galaxy power spectrum and the Lyman-alpha forest data. We show that these constraints are satisfied in large regions of the parameter space and, as a result, the late invisible decays to/of the gravitino can be responsible for the entire dark matter relic abundance.
description: 9 pages, 6 figures. Submitted to PRD
Enlarging the Circle of Environmental Deliberation: Addressing Transnational, Intergenerational, and Interspecies Issues
Creators: name: Guedes Vidal, Diogo
name: Alves, Fatima
Publisher: name: Zenodo
Year: 2023

description: Communication at the WEBINAR "Inclusion Before Deliberation: How to Perform Your Interests" organised by the Fondazione Giangiacomo Feltrinelli (Milan, Italy).
Doing more with less: Provisioning Systems and the Transformation of the Stock-Flow-Service Nexus
Creators: name: Plank, Christina
name: Liehr, Stefan
name: Hummel, Diana
name: Wiedenhofer, Dominik
name: Haberl, Helmut
name: Görg, Christoph
Publisher: name: Zenodo
Year: 2020

description: Presentation at the Research Seminar of Social Ecology, 03.06.2020
On the analysis of signal peaks in pulse-height spectra
Creators: name: Rodgers, C.R.
name: Iliadis, C.
Publisher: name: Elsevier B.V.
Year: 2021

description: The estimation of the signal location and intensity of a peak in a pulse height spectrum is important for X-ray and γ-ray spectroscopy, charged-particle spectrometry, liquid chromatography, and many other subfields. However, both the “centroid” and “signal intensity” of a peak in a pulse-height spectrum are ill-defined quantities and different methods of analysis will yield different numerical results. Here, we apply three methods of analysis. Method A is based on simple count summation and is likely the technique most frequently applied in practice. The analysis is straightforward and fast, and does not involve any statistical modeling. We find that it provides reliable results only for high signal-to-noise data, but has severe limitations in all other cases. Method B employs a Bayesian model to extract signal counts and centroid from the measured total and background counts. The resulting values are derived from the respective posteriors and, therefore, have a rigorous statistical meaning. The method makes no assumptions about the peak shape. It yields reliable and relatively small centroid uncertainties. However, it provides relatively large signal count uncertainties. Method C makes a strong assumption regarding the peak shape by fitting a Gaussian function to the data. The fit is based again on a Bayesian model. Although Method C requires careful consideration of the Gaussian width (usually given by the detector resolution) used in the fitting, it provides reliable values and relatively small uncertainties both for the signal counts and the centroid.
Zipping and Unzipping in String Networks: Dynamics of Y-junctions
Creators: name: Avgoustidis, A.
name: Pourtsidou, A.
name: Sakellariadou, M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study, within the Nambu-Goto approximation, the stability of massive string junctions under the influence of the tensions of three strings joining together in a Y-type configuration. The relative angle $β$ between the strings at the junction is in general time-dependent and its evolution can lead to zipping or unzipping of the three-string configuration. We find that these configurations are stable under deformations of the tension balance condition at the junction. The angle $β$ relaxes at its equilibrium value and the junction grows relativistically. We then discuss other potential "unzipping agents" including monopole/string forces for long strings and curvature for loops, and we investigate specific solutions exhibiting decelerated zipping and unzipping of the Y-junction. These results provide motivation for incorporating the effects of realistic string interactions in network evolution models with string junctions.
description: 24 pages, 11 figures
Photothermal effect in macroscopic optomechanical systems with an intracavity nonlinear optical crystal
Creators: name: Otabe, Sotatsu
name: Komori, Kentaro
name: Harada, Ken-ichi
name: Suzuki, Kaido
name: Michimura, Yuta
name: Somiya, Kentaro
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Intracavity squeezing is a promising technique that may improve the sensitivity of gravitational wave detectors and cool optomechanical oscillators to the ground state. However, the photothermal effect may modify the occurrence of optomechanical coupling due to the presence of a nonlinear optical crystal in an optical cavity. We propose a novel method to predict the influence of the photothermal effect by measuring the susceptibility of the optomechanical oscillator and identifying the net optical spring constant and photothermal absorption rate. Using this method, we succeeded in precisely estimating parameters related to even minor photothermal effects, which could not be measured using a previously developed method.
description: 15 pages, 5 figures
Carbon-Oxygen Classical Novae Are Galactic 7Li Producers as well as Potential Supernova Ia Progenitors
Creators: name: Woodward, C.E.
name: Starrfield, S.
name: Wagner, R.M.
name: Iliadis, C.
name: Hix, W.R.
name: Bose, M.
Publisher: name: Institute of Physics Publishing
Year: 2020

description: We report on studies of classical nova (CN) explosions where we follow the evolution of thermonuclear runaways (TNRs) on carbon-oxygen (CO) white dwarfs (WDs). We vary both the mass of the WD (from 0.6 M o˙ to 1.35 M o˙) and the composition of the accreted material. Our simulations are guided by the results of multidimensional studies of TNRs in WDs, which find that sufficient mixing with WD core material occurs after the TNR is well underway, and levels of enrichment are reached that agree with observations of CN ejecta abundances. We use NOVA (our one-dimensional hydrodynamic code) to accrete solar matter until the TNR is ongoing and then switch to a mixed composition (either 25% WD material and 75% solar or 50% WD material and 50% solar). Because the amount of accreted material is inversely proportional to the initial 12C abundance, by first accreting solar matter the amount of material taking part in the outburst is larger than in those simulations where we assume a mixed composition from the beginning. Our results show large enrichments of 7Be in the ejected gases, implying that CO CNe may be responsible for a significant fraction (∼100 M o˙) of the 7Li in the galaxy (∼1000 M o˙). Although the ejected gases are enriched in WD material, the WDs in these simulations eject less material than they accrete. We predict that the WD is growing in mass as a consequence of the accretion-outburst-accretion cycle, and CO CNe may be an important channel for SN Ia progenitors.
Machine Learning for Software Dependability: Appendix data
Creators: name: Lutellier, Thibaud
Publisher: name: Zenodo
Year: 2020

description: This archive contains the results of the 3 supporting projects done for my PhD thesis (Machine Learning for SoftwareDependability) at the University of Waterloo. If you are using the data, please cite the associated Ph.D. thesis, as well as relevant articles published in the context of the Ph.D. thesis.
Introduction of DC line structures into a superconducting microwave 3D cavity
Creators: name: Kong, Wei-Cheng
name: Deng, Guang-Wei
name: Li, Shu-Xiao
name: Li, Hai-Ou
name: Cao, Gang
name: Xiao, Ming
name: Guo, Guo-Ping
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report a technique that can noninvasively add multiple DC wires into a 3D superconducting microwave cavity for electronic devices that require DC electrical terminals. We studied the influence of our DC lines on the cavity performance systematically. We found that the quality factor of the cavity is reduced if any of the components of the electrical wires cross the cavity equipotential planes. Using this technique, we were able to incorporate a quantum dot (QD) device into a 3D cavity. We then controlled and measured the QD transport signal using the DC lines. We have also studied the heating effects of the QD by the microwave photons in the cavity.
International mobility for enhancing leadership in women engineering students: a case study connecting Colombia and Spain
Creators: name: García-Holgado, Alicia
Publisher: name: Zenodo
Year: 2023
Subjects: mentorías
mujer en STEM
mujer en ingeniería
internacionalización

description: Presentación para el LAWCC 2023 – XV Congreso de la Mujer Latinoamericana en la Computación que tiene lugar como parte de CLEI 2023 (Conferencia Latinoamerica de Informática).
Autoras del trabajo presentado:
 Alicia García-Holgado, Sonia Verdugo-Castro, Vilma V. Ojeda-Caicedo, y Sonia H. Contreras-Ortiz
Developing a fast cloud-based simulation workflow for the full aerodynamic evaluation of airborne vehicles
Creators: name: Schubiger, Alain
name: van Oerle, Dario
name: Boiger, Gernot
Publisher: name: International Society of Multiphysics
Year: 2022
Subjects: OpenFOAM
Massive Simultaneous Cloud Computing (MSCC)
Computational Fluid Dynamics (CFD)
Aerodynamic analysis
005: Computerprogrammierung, Programme und Daten

description: References:
[1] Gernot Kurt Boiger, Darren Sharman, Bercan Siyahhan, Viktor Lienhard, Marlon Boldrini, and Dominic Drew. A massive simultaneous cloud computing platform for openfoam. In 9th OpenFOAM Conference, online, 19-20 October 2021. ZHAW Zürcher Hochschule für Angewandte Wissenschaften, 2021.2
description: The field of Computational Science is facing an increasing demand for data-intensive research. Engineering tasks such as parameter-, sensitivity- and optimisation studies require ensemble computing to an ever-increasing extent. At the same time, the field of artificial intelligence (AI) is pushing for ever more extensive, numerically derived learning-, testing- and validation data. 
With the cloud software KaleidoSim, we can run hundreds of numerical simulations simultaneously [1] and generate large amounts of data in a short time. Whilst KaleidoSim supports various simulation tools, only OpenFOAM is used in this study.
In this work, we have developed tools and routines to accelerate, simplify and automate studies with hundreds of simultaneous simulations in the cloud. We performed a full 360° aerodynamics analysis of different aircraft to test our toolbox. The study included 420 OpenFOAM simulation cases. Each case was a steady-state, Reynolds Average Stress (RAS) turbulence model-based, single-phase flow simulation on a 1.5 million cell hexahedral finite volume grid. Drag and lift coefficients were calculated for each case. For the toolbox development, we used a combination of Python and KaleidoSim Application Programming Interface (API) routines. The Python-based graphical user interface (GUI) allows switching between different CAD models to compare multiple aircraft. The GUI also allows mesh sensitivity analysis to determine optimised meshes for each aerodynamic shape. Based on this, we performed a series of mesh sensitivity analyses using snappyHexMesh and CfMesh meshes.
This work has shown that a combination of cloud computing via KaleidoSim-based API routines and Python scripting can speed up certain parameter study workflows by a factor of 50-100. Specifically, the exemplary representative semi-automated workflow of the 420-case aerodynamic study could be performed and post-processed in less than 45 minutes, whereas a comparable workflow had previously taken up to an entire work week on local hardware.
Bayesian Estimation of the D(p,γ)3He Thermonuclear Reaction Rate
Creators: name: De Souza, R.S.
name: Iliadis, C.
name: Moscoso, J.
name: Coc, A.
Publisher: name: IOP Publishing Ltd
Year: 2021

description: Big bang nucleosynthesis (BBN) is the standard model theory for the production of light nuclides during the early stages of the universe, taking place about 20 minutes after the big bang. Deuterium production, in particular, is highly sensitive to the primordial baryon density and the number of neutrino species, and its abundance serves as a sensitive test for the conditions in the early universe. The comparison of observed deuterium abundances with predicted ones requires reliable knowledge of the relevant thermonuclear reaction rates and their corresponding uncertainties. Recent observations reported the primordial deuterium abundance with percent accuracy, but some theoretical predictions based on BBN are in tension with the measured values because of uncertainties in the cross section of the deuterium-burning reactions. In this work, we analyze the S-factor of the D(p,γ)3He reaction using a hierarchical Bayesian model. We take into account the results of 11 experiments, spanning the period of 1955-2021, more than any other study. We also present results for two different fitting functions, a two-parameter function based on microscopic nuclear theory and a four-parameter polynomial. Our recommended reaction rates have a 2.2% uncertainty at 0.8 GK, which is the temperature most important for deuterium BBN. Differences between our rates and previous results are discussed.
Tribal's development in India: Promises and Performances
Creators: name: Sumant Kumar
Publisher: name: Zenodo
Year: 2015
Subjects: Tribal
Human Rights
Violations
India

description: Tribal development in India work has discussed both development and challenges face by the tribal people in India. To know their situation this work has highlighted the exploitation on tribal people since British era and also focused how exploitation is increased after Indian Independence and denied most of the rights after Liberalisation, Privatisation and Globalisation.
Les plateformes de glace
Creators: name: Jourdain, Nicolas C.
Publisher: name: Zenodo
Year: 2024

description: Texte de Nicolas Jourdain sur l'histoire de la découverte humaine et scientifique des grandes plateformes de glace.

 

Une version anglaise de ce texte a été évaluée par Masa Kageyama, Eric Steig, Stephen Rintoul et Frank Pattyn dans le cadre de l’Habilitation à Diriger des Recherches de l’auteur (Juin 2024). Une version partielle et condensée de ce texte a été soumise à La Météorologie et éditée par Serge Soula.
Multilingual Name Entity Recognition and Intent Classification Employing Deep Learning Architectures
Creators: name: Rizou, Sofia
name: Paflioti, Antonia
name: Theofilatos, Angelos
name: Vakali, Athena
name: Sarigiannidis, George
name: Chatzisavvas, Konstantinos Ch.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences
subject: I.2.7; I.2.1; I.2.11

description: Named Entity Recognition and Intent Classification are among the most important subfields of the field of Natural Language Processing. Recent research has lead to the development of faster, more sophisticated and efficient models to tackle the problems posed by those two tasks. In this work we explore the effectiveness of two separate families of Deep Learning networks for those tasks: Bidirectional Long Short-Term networks and Transformer-based networks. The models were trained and tested on the ATIS benchmark dataset for both English and Greek languages. The purpose of this paper is to present a comparative study of the two groups of networks for both languages and showcase the results of our experiments. The models, being the current state-of-the-art, yielded impressive results and achieved high performance.
description: 24 pages, 5 figures, 11 tables, dataset available
On the orbit space of a three-dimensional compact linear Lie group
Creators: name: Styrt, O. G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 22C05, 22E15, 22E45

description: We study the question of whether the topological quotient of a real linear representation of a simple three-dimensional compact Lie group is a manifold. We obtain an upper bound for the dimension of a representation whose quotient is a manifold, and examine most of the remaining cases.
description: in Russian
Linear polarization–direction correlations in γ -ray scattering experiments
Creators: name: Friman-Gayer, U.
name: Iliadis, C.
Publisher: name: Springer Science and Business Media Deutschland GmbH
Year: 2021

description: Scattering measurements with incident linearly polarized γ rays provide information on spins, parities, and γ-ray multipolarity mixing coefficients, and, therefore, on the nuclear matrix elements involved in the transitions. We present the general formalism for analyzing the observed angular correlations. The expressions are used to compute three-dimensional radiation patterns, which are important tools for optimizing experimental setups. Frequently, γ-ray transitions can proceed via two multipolarities that mix coherently. In such cases, the relative phases of the nuclear matrix elements are important when comparing results from different measurements. We discuss different phase conventions that have been used in the literature and present their relationships. Finally, we propose a basic experimental geometry consisting of detectors located at four different spatial locations. For this geometry, we present the measured anisotropies of the emitted γ rays in graphical format as an aid in the data analysis.
Sub-MeV Band Observation of a Hard Burst from AXP 1E 1547.0-5408 with the Suzaku Wide-band All-sky Monitor
Creators: name: Yasuda, Tetsuya
name: Iwakiri, Wataru B.
name: Tashiro, Makoto S.
name: Terada, Yukikatsu
name: Kouzu, Tomomi
name: Enoto, Teruaki
name: Nakagawa, Yujin E.
name: Bamba, Aya
name: Urata, Yuji
name: Yamaoka, Kazutaka
name: Ohno, Masanori
name: Shibata, Sinpei
name: Makishima, Kazuo
name: team, The Suzaku-WAM
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The 2.1-s anomalous X-ray pulsar 1E 1547.0-5408 exhibited an X-ray outburst on 2009 January 22, emitting a large number of short bursts. The wide-band all- sky monitor (WAM) on-board Suzaku detected at least 254 bursts in the 160keV-6.2MeV band over the period of January 22 00:57-17:02 UT from the direction of 1E 1547.0-5408. One of these bursts, which occurred at 06:45:13, produced the brightest fluence in the 0.5-6.2MeV range, with an averaged 0.16-6.2MeV flux and extrapolated 25 keV-2 MeV fluence of about 3x10-6 erg cm-2 s-1 and about 3x10-4 erg cm-2, respectively. After pile-up corrections, the time-resolved WAM spectra of this burst were well-fitted in the 0.16-6.2MeV range by two-component models; specifically, a blackbody plus an optically thin thermal bremsstrahlung or a combination of a blackbody and a power-law component with an exponential cutoff. These results are compared with previous works reporting the persistent emission and weaker short bursts followed by the same outburst.
description: 20 pages, 10 figures, 1 table, PASJ, accepted
ФРИДРИХ НИЦШЕ ВА МАДАНИЯТНИНГ ИРОДА АСОСИДАГИ ТАЛҚИНИ
Creators: name: Мавлянов, У.Н.
name: Райимжонов, И.Х.
name: Абдуалимова, З.М.
Publisher: name: Zenodo
Year: 2025

description: Ушбу мақолада немис файласуфи Фридрих Ницшенинг маданиятга нисбатан ёндашуви ва унинг “ҳаёт фалсафаси” асосида шаклланган маданий-фалсафий концепцияси таҳлил қилинади. Ницше маданиятни инсоннинг заифлигини яшириш ва ҳаёт оқимидан паноҳ излаш воситаси сифатида баҳолайди. У “ҳокимиятга ирода”, “юксак инсон”, “лабиринтли одам”, “ақидавий қоидаларнинг инкор этилиши”, “дионисий ва аполлоний ибтидолар” каби тушунчалар орқали Европа маданиятининг инқирозга учраганини, христиан ахлоқининг аҳамияти сўнганини ва янги маданий юксалиш фақат элита, яъни юксак инсонлар фаолияти орқали амалга ошиши мумкинлигини асослайди. Мақолада Ницшенинг санъат, ахлоқ, ирода, жинс ва инсоният келажаги ҳақидаги таҳлиллари ҳам ёритилади.
Hierarchical Bayesian Thermonuclear Rate for the 7Be(n,p)7Li Big Bang Nucleosynthesis Reaction
Creators: name: De Souza, R.S.
name: Iliadis, C.
name: Kiat, T.H.
name: Coc, A.
Publisher: name: Institute of Physics Publishing
Year: 2020

description: Big Bang nucleosynthesis provides the earliest probe of standard model physics, at a time when the universe was less than 1000 seconds old. It determines the abundances of the lightest nuclides, which give rise to the subsequent history of the visible matter in the universe. This work derives new 7Be(n,p)7Li thermonuclear reaction rates based on all available experimental information. This reaction sensitively impacts the primordial abundances of 7Be and 7Li during big bang nucleosynthesis. We critically evaluate all available data and disregard experimental results that are questionable. For the nuclear model, we adopt an incoherent sum of single-level, two-channel, R-matrix approximation expressions, which are implemented into a hierarchical Bayesian model, to analyze the remaining six data sets we deem most reliable. In the fitting of the data, we consistently model all known sources of uncertainty, including discrepant absolute normalizations of different data sets, and also take the variation of the neutron and proton channel radii into account, hence providing less biased estimates of the 7Be(n,p)7Li thermonuclear rates. From the resulting posteriors, we extract R-matrix parameters (E r, γ2 n, γ2 p) and derive excitation energies and partial and total widths. Our fit is sensitive to the contributions of the first three levels above the neutron threshold. Reaction rates were computed by integrating 10,000 samples of the reduced cross section. Our 7Be(n,p)7Li thermonuclear rates have uncertainties between 1.5% and 2.0% at temperatures of ≤1 GK. We compare our rates to previous results and find that the 7Be(n,p)7Li rates most commonly used in big bang simulations have uncertainties that are too optimistic.
Alternative formulations for gilthead seabream diets: towards a more sustainable production
Creators: name: Aragão, C.
name: Cabano, M.
name: Colen, R.
name: Fuentes, J.
name: Dias, J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: FOS: Biological sciences

description: To support the expected increase in aquaculture production during the next years, a wider range of alternative ingredients to fishmeal is needed, towards contributing to an increase in production sustainability. This study aimed to test diets formulated with non-conventional feed ingredients on gilthead seabream (Sparus aurata) growth performance, feed utilization, apparent digestibility of nutrients and nutrient outputs to the environment. Four isonitrogenous and isoenergetic diets were formulated: a control diet (CTRL) similar to a commercial feed and three experimental diets containing, as main protein sources, plant by-products, glutens and concentrates (PLANT); processed animal proteins (PAP); or micro/macroalgae, insect meals and yeast (EMERG). Diets were tested in triplicate during 80 days. The (EMERG) treatment resulted in lower fish growth performance, higher FCR and lower nutrient and energy retentions than the other treatments. The lowest protein digestibility was found for the EMERG diet, which caused increased nitrogen losses. The PLANT and PAP treatments resulted in better fish growth performance, higher nutrient and energy retentions, and lower FCR than the CTRL treatment. The significant improvement in FCR found for fish fed PLANT and PAP diets and the high protein digestibility of these diets contribute towards minimizing the environmental impacts of seabream production
Astrophysical S-factors, Thermonuclear Rates, and Electron Screening Potential for the 3 He(d,p) 4 He Big Bang Reaction via a Hierarchical Bayesian Model
Creators: name: Iliadis, C.
name: De Souza, R.S.
name: Coc, A.
Publisher: name: Institute of Physics Publishing
Year: 2019

description: We developed a hierarchical Bayesian framework to estimate S-factors and thermonuclear rates for the 3 He(d,p) 4 He reaction, which impacts the primordial abundances of 3 He and 7 Li. The available data are evaluated and all direct measurements are taken into account in our analysis for which we can estimate separate uncertainties for systematic and statistical effects. For the nuclear reaction model, we adopt a single-level, two-channel approximation of R-matrix theory, suitably modified to take the effects of electron screening at lower energies into account. In addition to the usual resonance parameters (resonance location and reduced widths for the incoming and outgoing reaction channel), we include the channel radii and boundary condition parameters in the fitting process. Our new analysis of the 3 He(d,p) 4 He S-factor data results in improved estimates for the thermonuclear rates. This work represents the first nuclear rate evaluation using R-matrix theory embedded into a hierarchical Bayesian framework, properly accounting for all known sources of uncertainty. Therefore, it provides a test bed for future studies of more complex reactions.
title: Capturing physical, technical and economic constraints on electricity generation
title: a description of the IMACLIM-R electricity module
titleType: Subtitle
Creators: name: BRIERA, Thibault
Publisher: name: Chair Prospective Modeling for sustainable development
Year: 2023
Subjects: classificationCode: 2.7
subject: FOS: Environmental engineering

description: IMACLIM-R is a twelve region, recursive hybrid general equilibrium model that in- cludes a technology-rich,bottom-up electricity module. The long-term investment decision is represented by a modified multinomial logit structure in which 20 explicit technologies compete based on the most current electricity generation costs. The cost competition takes place under imperfect foresight and with various possible regimes of beliefs about future climate policy. Key characteristics of electricity supply are presented: Capital obsolescence, fuel efficiency, load factor, carbon capture and storage, renewable integra- tion challenges. Both investment and dispatch decisions are made on an annual basis, beginning in 2015, to provide meaningful insights into future electricity systems, their contribution to climate change mitigation, and their linkages with the rest of the economy.
The supercritical regime in the normal matrix model with cubic potential
Creators: name: Kuijlaars, Arno B. J.
name: Tovbis, Alexander
Publisher: name: arXiv
Year: 2014
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The normal matrix model with a cubic potential is ill-defined and it develops a critical behavior in finite time. We follow the approach of Bleher and Kuijlaars to reformulate the model in terms of orthogonal polynomials with respect to a Hermitian form. This reformulation was shown to capture the essential features of the normal matrix model in the subcritical regime, namely that the zeros of the polynomials tend to a number of segments (the motherbody) inside a domain (the droplet) that attracts the eigenvalues in the normal matrix model. In the present paper we analyze the supercritical regime and we find that the large $n$ behavior is described by the evolution of a spectral curve satisfying the Boutroux condition. The Boutroux condition determines a system of contours $Σ_1$, consisting of the motherbody and whiskers sticking out of the domain. We find a second critical behavior at which the original motherbody shrinks to a point at the origin and only the whiskers remain. In the regime before the second criticality we also give strong asymptotics of the orthogonal polynomials by means of a steepest descent analysis of a $3 \times 3$ matrix valued Riemann-Hilbert problem. It follows that the zeros of the orthogonal polynomials tend to $Σ_1$, with the exception of at most three spurious zeros.
description: 65 pages, 13 figures
Carbo4Power D9.1: Project Logo, Leaflets and Website
Creators: name: Mónica Spreadbury
name: Bojan Boskovic
name: Jelena Aleksic
name: Sofia Billett
name: Costas Charitidis
Publisher: name: Zenodo
Year: 2021

description: This deliverable is presenting the materials Cambridge Nanomaterials Technology Ltd. (CNAT), as leader of the Work Package 9, has produced with the aim to reach a wider audience in order to increase the project visibility and facilitate the dissemination of the project results.CNAT was in charge of the development of the Carbo4Power website and production of the project leaflet and logo. The project website and leaflet will be updated periodically as the project develops and more information is made publicly available. All information used in the materials are already in the public domain, through the European Commission (Cordis website) and partners’ websites.CNAT will also manage the project Twitter account (https://twitter.com/Carbo4P) and LinkedIn presence (https://www.linkedin.com/groups/12498504/).The communication materials prepared for the Carbo4Power Project aim to provide support to the partners with their dissemination and communication activities. This task runs throughout the duration of the whole project.The process of developing this deliverable (the Project logo, leaflet and website) is described below.
Membranes and macromolecules: uncovering complexity in simulation
Creators: name: Wang, Lily
Publisher: name: The Australian National University
Year: 2023

description: In molecular dynamics (MD) simulations, we use simplified physical laws to define a representative universe so that we may gain insight into phenomena that occurs in our own. MD simulations have become indispensable tools in biomolecular and pharmaceutical research, allowing exploration of complex biological systems at a spatiotemporal resolution and breadth still unparalleled by experimental techniques. However, the usefulness of MD simulations is limited by the extent to which behaviour observed in simplified simulations is representative of physical reality. The following thesis explores the impact on simulations of biomolecular systems such as membrane proteins of both the various parameter sets used to define the physics of MD, as well as the degree to which the composition of the system reflects the complexity of reality. The first chapter begins by comparing the performance of common protein force fields on the dynamics of a large membrane transporter protein, P-glycoprotein. The second chapter further investigates the impact of different popular methods for assigning electrostatic parameters on small molecule hydration free energies and the implications for macromolecules such as polymers. Finally, the third chapter examines the dynamics of membranes. Long regarded as the simple background milieu of membrane proteins, the work in this thesis highlights the importance of membrane composition and complexity on the dynamics and biophysical properties of the proteins that sit within them. Overall, this thesis probes and quantifies various aspects and decisions in studying biomolecular systems through molecular dynamics simulations.
An ultra-luminous quasar with a twelve-billion-solar-mass black hole at redshift 6.30
Creators: name: Wu, Xue-Bing
name: Wang, Feige
name: Fan, Xiaohui
name: Yi, Weimin
name: Zuo, Wenwen
name: Bian, Fuyan
name: Jiang, Linhua
name: McGreer, Ian D.
name: Wang, Ran
name: Yang, Jinyi
name: Yang, Qian
name: Thompson, David
name: Beletsky, Yuri
Publisher: name: arXiv
Year: 2015
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: So far, roughly 40 quasars with redshifts greater than z=6 have been discovered. Each quasar contains a black hole with a mass of about one billion solar masses ($10^9 M_\odot$). The existence of such black holes when the Universe was less than 1 billion years old presents substantial challenges to theories of the formation and growth of black holes and the coevolution of black holes and galaxies. Here we report the discovery of an ultra-luminous quasar, SDSS J010013.02+280225.8, at redshift z=6.30. It has an optical and near-infrared luminosity a few times greater than those of previously known z>6 quasars. On the basis of the deep absorption trough on the blue side of the Ly $α$ emission line in the spectrum, we estimate the proper size of the ionized proximity zone associated with the quasar to be 26 million light years, larger than found with other z>6.1 quasars with lower luminosities. We estimate (on the basis of a near-infrared spectrum) that the black hole has a mass of $\sim 1.2 \times 10^{10} M_\odot$, which is consistent with the $1.3 \times 10^{10} M_\odot$ derived by assuming an Eddington-limited accretion rate.
description: 24 pages, 4 figures plus 4 extended data figures, published in Nature on 26 February 2015
Quantum Quench for inhomogeneous states in the non-local Luttinger model
Creators: name: Mastropietro, Vieri
name: Wang, Zhituo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In the Luttinger model with non-local interaction we investigate, by exact analytical methods, the time evolution of an inhomogeneous state with a localized fermion added to the non interacting ground state. In absence of interaction the averaged density has two peaks moving in opposite directions with constant velocities. If the state is evolved with the interacting Hamiltonian two main effects appear. The first is that the peaks have velocities which are not constant but vary between a minimal and maximal value. The second is that a dynamical `Landau quasi-particle weight' appears in the oscillating part of the averaged density, asymptotically vanishing with time, as consequence of the fact that fermions are not excitations of the interacting Hamiltonian.
Carbo4Power D3.1: Simulation workflows and MODA sheets
Creators: name: Agustín Chiminelli
name: Clara Valero
name: Romilly Close
name: Thanasis Delizisis
name: Andreas Flanschger
name: Stefan Schreck
name: Peter Greaves
name: Yi Qin
name: Xingguo Zhou
name: Dimitrios Fantanas
name: C. A. Charitidis
Publisher: name: Zenodo
Year: 2021

description: Carbo4Power's main objective is to develop a new generation of lightweight, high strength, multifunctional, digitalized multi-materials for offshore turbine rotor blades (WTB & TTB) that will increase their operational performance and durability while reducing cost of energy production, maintenance and their environmental impact.

Modelling and simulation activities have been proposed in the project to support the analysis, design and optimization of the turbine blades. In addition, these activities will also support the development of new materials, coatings, joints and repairs. 

This report collects the MOdelling DAta (MODA) sheets prepared by WP3 partners for each simulation planned to be developed in C4P. The main purpose of it is to define the workflows, the inputs / outputs, the physics involved, the material relations and the methodologies / computational implementation of each individual model. In addition, the interactions between the different models are described.
Calculation of resonance energies from Q values
Creators: name: Iliadis, C.
Publisher: name: American Physical Society
Year: 2019

description: Resonance energies are frequently derived from precisely measured excitation energies and reaction Q values. The latter quantities are usually calculated from atomic instead of nuclear mass differences. This procedure disregards the energy shift caused by the difference in the total electron binding energies before and after the interaction. Assuming that the interacting nuclei in a stellar plasma are fully ionized, this energy shift can have a significant effect, considering that the resonance energy enters exponentially into the expression for the narrow-resonance thermonuclear reaction rates. As an example, the rate of the Ar36(p,γ)K37 reaction is discussed, which, at temperatures below 1GK, depends only on the contributions of a single resonance and direct capture. In this case, disregarding the energy shift caused by the total electron binding energy difference erroneously enhances the rate by ≈40% near temperatures of 70MK.
Thermonuclear fusion rates for tritium + deuterium using Bayesian methods
Creators: name: Iliadis, C.
name: De Souza, R.S.
name: Coc, A.
name: Boston, S.R.
Publisher: name: American Physical Society
Year: 2019

description: The H3(d,n)He4 reaction has a large low-energy cross section and will likely be utilized in future commercial fusion reactors. This reaction also takes place during Big Bang nucleosynthesis. Studies of both scenarios require accurate and precise fusion rates. To this end, we implement a one-level, two-channel R-matrix approximation into a Bayesian model. Our main goals are to predict reliable astrophysical S-factors and to estimate R-matrix parameters using the Bayesian approach. All relevant parameters are sampled in our study, including the channel radii, boundary condition parameters, and data set normalization factors. In addition, we take uncertainties in both measured bombarding energies and S-factors rigorously into account. Thermonuclear rates and reactivities of the H3(d,n)He4 reaction are derived by numerically integrating the Bayesian S-factor samples. The present reaction rate uncertainties at temperatures between 1.0 MK and 1.0 GK are in the range of 0.2% to 0.6%. Our reaction rates differ from previous results by 2.9% near 1.0 GK. Our reactivities are smaller than previous results, with a maximum deviation of 2.9% near a thermal energy of 4 keV. The present rate or reactivity uncertainties are more reliable compared to previous studies that did not include the channel radii, boundary condition parameters, and data set normalization factors in the fitting. Finally, we investigate previous claims of electron screening effects in the published H3(d,n)He4 data. No such effects are evident and only an upper limit for the electron screening potential can be obtained.
title: When Officers Get the "Blues": Factors That May Determine Which Officer Is More Inclined to Feel Job Stress
Creators: name: Nelson, Olivia Poppy
Publisher: name: Old Dominion University
publisherIdentifier: https://ror.org/04zjtrb98
publisherIdentifierScheme: ROR
Year: 1999

description: The purpose of this study was to investigate what factors may determine which officers may feel job stress. In today's law enforcement agencies stress is becoming an important topic to study. With the knowledge of what factors may determine stress in officers, stress can be reduced to avoid departmental loss. The data collection was conducted in 1998, during the Christmas season at a California law enforcement agency. This thesis looks at the impact of age, education, and job satisfaction on stress. It also looks at the relationship of age and education to job satisfaction. Multiple regression was run on all of the variables tested. This study's analysis suggests that there are no significant strong relationships between any of these variables and stress for this sample of officers.
Collisionally excited filaments in HST H$α$ and H$β$ images of HH~1/2
Creators: name: Raga, A. C.
name: Reipurth, B.
name: Castellanos-Ramírez, A.
name: Chiang, Hsin-Fang
name: Bally, J.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present new H$α$ and H$β$ images of the HH~1/2 system, and we find that the H$α$/H$β$ ratio has high values in ridges along the leading edges of the HH~1 bow shock and of the brighter condensations of HH~2. These ridges have H$α$/H$β=4\to 6$, which is consistent with collisional excitation from the $n=1$ to the $n=3$ and 4 levels of hydrogen in a gas of temperatures $T=1.5\to 10\times 10^4$~K. This is therefore the first direct proof that the collisional excitation/ionization region of hydrogen right behind Herbig-Haro shock fronts is detected.
description: 13 pages, 5 figures, ApJL accepted
Investigating plasma motion of magnetic clouds at 1 AU through a velocity-modified cylindrical force-free flux rope model
Creators: name: Wang, Yuming
name: Zhou, Zhenjun
name: Shen, Chenglong
name: Liu, Rui
name: Wang, S.
Publisher: name: arXiv
Year: 2015
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Magnetic clouds (MCs) are the interplanetary counterparts of coronal mass ejections (CMEs), and usually modeled by a flux rope. By assuming the quasi-steady evolution and self-similar expansion, we introduce three types of global motion into a cylindrical force-free flux rope model, and developed a new velocity-modified model for MCs. The three types of the global motion are the linear propagating motion away from the Sun, the expanding and the poloidal motion with respect to the axis of the MC. The model is applied to 72 MCs observed by Wind spacecraft to investigate the properties of the plasma motion of MCs. First, we find that some MCs had a significant propagation velocity perpendicular to the radial direction, suggesting the direct evidence of the CME's deflected propagation and/or rotation in interplanetary space. Second, we confirm the previous results that the expansion speed is correlated with the radial propagation speed and most MCs did not expand self-similarly at 1 AU. In our statistics, about 62\%/17\% of MCs underwent a under/over-expansion at 1 AU and the expansion rate is about 0.6 on average. Third, most interestingly, we find that a significant poloidal motion did exist in some MCs. Three speculations about the cause of the poloidal motion are therefore proposed. These findings advance our understanding of the MC's properties at 1 AU as well as the dynamic evolution of CMEs from the Sun to interplanetary space.
description: accepted by JGR
Bus Travel Time Predictions Using Additive Models
Creators: name: Kormaksson, Matthias
name: Barbosa, Luciano
name: Vieira, Marcos R.
name: Zadrozny, Bianca
Publisher: name: arXiv
Year: 2014
Subjects: subject: Machine Learning (cs.LG)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Many factors can affect the predictability of public bus services such as traffic, weather and local events. Other aspects, such as day of week or hour of day, may influence bus travel times as well, either directly or in conjunction with other variables. However, the exact nature of such relationships between travel times and predictor variables is, in most situations, not known. In this paper we develop a framework that allows for flexible modeling of bus travel times through the use of Additive Models. In particular, we model travel times as a sum of linear as well as nonlinear terms that are modeled as smooth functions of predictor variables. The proposed class of models provides a principled statistical framework that is highly flexible in terms of model building. The experimental results demonstrate uniformly superior performance of our best model as compared to previous prediction methods when applied to a very large GPS data set obtained from buses operating in the city of Rio de Janeiro.
description: 11 pages, this is the technical report supporting the IEEE 2014 International Conference on Data Mining (ICDM) submission with the same title