cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Lucile Randon's ancestors longevity and comparison with Jeanne Calment and Marie-Louise Meilleur
Creators: name: Robin-Champigneul, François
name: Léculier, Jean-Michel
name: Saragossa, Laurence
name: Desjardins, Bertrand
name: Bisson Boyer, Caroline
name: Depoudent, Cyril
name: Robine, Jean-Marie
Publisher: name: Zenodo
Year: 2024

description: Lucile Randon, who died in France on January 17th, 2023 at the age of 118 years and 340 days,is officially the fourth oldest person whose age at death has been verified after JeanneCalment who died in 1997 at the age of 122 years, Kane Tanaka who died in 2022 at the ageof 119 years, and Sarah Knauss who died in 1999, also at the age of 119 years. As her TotalImmediate Ancestor Longevity (TIAL) score was very high, we wanted to find and validate thelongevity of her ancestors as far back in time as possible and compare it with that of controlpairs of her ancestors, recorded at the same time and in the same place, using a protocol likethat used to study the longevity of Jeanne Calment's ancestors. The longevity performance ofthe ancestors of the two doyennes of humanity will be analyzed, and the history of LucileRandon's family will be briefly studied from the geographical, consanguinity, social(occupations, heritage) and religious angles, with the research being compared witheyewitness accounts. The presentation will highlight the similarities and differences betweenthe two studies. The strong family heritability of longevity suggested by these two studiesprompts studies into the longevity of the ancestors of long living individuals.
Time-reversal symmetry breaking in a square lattice
Creators: name: Jimenez, Kevin
name: Reslen, Jose
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The bulk conductivity of a two-dimensional system is studied assuming that quantum interference effects break time-reversal symmetry in the presence of strong spin-orbit interaction and strong lattice potential. The study is carried out by direct diagonalization in order to explore the nonlinear-response regime. The system displays a quantized conductivity that depends on the intensity of the electric field and under specific conditions the conductivity limit at zero electric field shows a nonvanishing value.
description: 6 pages, 5 figures, comments or suggestions are welcome
Semiconductor charge qubit relaxation due to two-phonon processes
Creators: name: Stavrou, V. N.
name: Hu, Xuedong
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We theoretically study the relaxation of electron orbital states of a double quantum dot system due to two-phonon processes. In particular, we calculate how the relaxation rates depend on the separation distance between the quantum dots, the strength of quantum dot confinement, and the lattice temperature. Enhancement of the rates by specific inter-dot distances and lattice temperatures, and the relative strength of different scattering channels are discussed. Our results show that although at low temperatures ($T \sim 1$ K) two-phonon processes are almost four orders of magnitude weaker compared to one-phonon processes in relaxing electron orbital states, at room temperature they are as important as one-phonon processes.
description: Submitted to PRB
Condition for emergence of complex eigenvalues in the Bogoliubov-de Gennes equations
Creators: name: Nakamura, Y.
name: Mine, M.
name: Okumura, M.
name: Yamanaka, Y.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The condition for the appearance of dynamical instability of the Bose-condensed system, characterized by the emergence of complex eigenvalues in the Bogoliubov-de Gennes equations, is studied analytically. We perturbatively expand both the Gross-Pitaevskii and Bogoliubov-de Gennes equations with respect to the coupling constant. It is concluded that the degeneracy between a positive-norm eigenmode and a negative-norm one is essential for the emergence of complex modes. Based on the conclusion, we justify the two-mode approximation applied in our previous work [E. Fukuyama \textit{et al}., Phys. Rev. A {\bf 76}, 043608 (2007)], in which we analytically studied the condition for the existence of complex modes when the condensate has a highly quantized vortex.
description: 7pages
Mutual information between geomagnetic indices and the solar wind as seen by WIND - implications for propagation time estimates
Creators: name: March, T. K.
name: Chapman, S. C.
name: Dendy, R. O.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The determination of delay times of solar wind conditions at the sunward libration point to effects on Earth is investigated using mutual information. This measures the amount of information shared between two timeseries. We consider the mutual information content of solar wind observations, from WIND, and the geomagnetic indices. The success of five commonly used schemes for estimating interplanetary propagation times is examined. Propagation assuming a fixed plane normal at 45 degrees to the GSE x-axis (i.e. the Parker Spiral estimate) is found to give optimal mutual information. The mutual information depends on the point in space chosen as the target for the propagation estimate, and we find that it is maximized by choosing a point in the nightside rather than dayside magnetosphere. In addition, we employ recurrence plot analysis to visualize contributions to the mutual information, this suggests that it appears on timescales of hours rather than minutes.
Single top production in the $t$-channel at LHC: a realistic test of electroweak models
Creators: name: Beccaria, M.
name: Macorini, G.
name: Renard, F. M.
name: Verzegnassi, C.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We compute the complete electroweak one-loop effect on the process of $t$-channel single top production at LHC in the Standard Model and in the MSSM within the mSUGRA symmetry breaking scheme. We find that the one-loop electroweak SM effect is large, and decreases the cross section of an amount that is of the same size as that of the NLO QCD one. The genuine SUSY effect in the mSUGRA scheme, for a general choice of benchmark points, is rather small. It might become large and visible in more general scenarios around thresholds involving light stop and neutralino mass values.
description: 28 pages, 10 eps figures
Strong to weak coupling transitions of SU(N) gauge theories in 2+1 dimensions
Creators: name: Bursa, Francis
name: Teper, Michael
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We investigate strong-to-weak coupling transitions in D=2+1 SU(N->oo) gauge theories, by simulating lattice theories with a Wilson plaquette action. We find that there is a strong-to-weak coupling cross-over in the lattice theory that appears to become a third-order phase transition at N=oo, in a manner that is essentially identical to the Gross-Witten transition in the D=1+1 SU(oo) lattice gauge theory. There is also evidence for a second order transition at N=oo at approximately the same coupling, which is connected with centre monopoles (instantons) and so analogues to the first order bulk transition that occurs in D=3+1 lattice gauge theories for N>4. We show that as the lattice spacing is reduced, the N=oo gauge theory on a finite 3-torus suffers a sequence of (apparently) first-order ZN symmetry breaking transitions associated with each of the tori (ordered by size). We discuss how these transitions can be understood in terms of a sequence of deconfining transitions on ever-more dimensionally reduced gauge theories.We investigate whether the trace of the Wilson loop has a non-analyticity in the coupling at some critical area, but find no evidence for this although, just as in D=1+1,the eigenvalue density of a Wilson loop forms a gap at N=oo for a critical trace. The physical implications of this are unclear.The gap formation is a special case of a remarkable similarity between the eigenvalue spectra of Wilson loops in D=1+1 and D=2+1 (and indeed D=3+1): for the same value of the trace, the eigenvalue spectra are nearly identical.This holds for finite as well as infinite N; irrespective of the Wilson loop size in lattice units; and for Polyakov as well as Wilson loops.
description: 44 pages, 28 figures. Extensive changes and clarifications with new results on non-analyticities and eigenvalue spectra of Wilson loops. This version to be submitted for publication
Being in the black : the business of development in Northern Australia
Creators: name: Gould, Jacqueline Lisa
Publisher: name: The Australian National University
Year: 2010
Subjects: subject: DU124.B86 G68 2010
subject: Business enterprises, Aboriginal Australian Australia, Northern
subject: Community development Case studiesAustralia, Northern
subject: Community development Citizen participationAustralia, Northern

description: This thesis explores how Indigenous development aspirations vary across social settings, and the ways in which Indigenous people approach 'business' as a means of realising partidcular developemnt goals. Six Indigenous enterprises from two regions are presented as case studies ... Participatory development approaches focus on how power is distributed within various development settings. This approach is relevant in Australia where inqualities characterise both Indigenous/non-Indigenous relations, as well as intra-Indigenous ones. A focus on power allows one to consider how development projects impact upon variously situated Indigenous people and groups. The thesis also contributes new ethnographic material in relation to my two case study groups, and the six study ventures.
The experience of schooling and discontinuing schooling in Fiji
Creators: name: Mishra-Vakaoti, Vanisha Nandini
Publisher: name: The Australian National University
Year: 2013
Subjects: subject: Dropouts Fiji
subject: School enrollment Fiji.
subject: Education MethodologyFiji
subject: Phenomenology

description: Concerns in Fiji over the ever increasing number of students who, at very young ages and early stages, discontinue schooling have made the exploration of schooling and discontinuing schooling timely. The one-dimensional 'at risk' media representation and public perception of children who discontinue schooling suggest that there is a limited understanding of children and young people's activities outside of the acceptable child spaces of the home and the school. Using a constructionist approach, this thesis uses phenomenological methodology to document and analyse the experiences of children and young people who are schooling and those who discontinue schooling. Data was collected using a questionnaire with children in school and in-depth interviews with children and young people who had discontinued schooling, allowing for the inclusion and active participation of one of the principal stakeholders in education - the children. The findings of the study demonstrate that on the whole, children have very positive experiences of school. The "I like school but...(I wish I could play more) or "I wish I could stay at home but...(I have to come to school so I can get a job later) comments of students however also demonstrate tensions in their understanding of and engagement with schooling. Children have internalised adult and societal expectations of them, with many students identifying the attainment of employment as the most important outcome of schooling. The experiences of children and young people who discontinue schooling suggest that there are two main factors which affect their future pathways: whether they discontinue schooling at the primary school level or at the secondary school level. Children who discontinue schooling at the primary school level often remain in their familial home where they are cared for by the adults. These children are less likely to seek other educational opportunities or employment, even as young adults. On the other hand, children who discontinue schooling at the secondary school level often leave home and seek other accommodation, with many in the urban areas turning to a street existence. Parents and family members are less likely to continue supporting and caring for these older children. This thesis suggests that a more sensitive understanding of children's hopes and experiences of schooling and discontinuing schooling will contribute to a more informed appreciation of a growing problem in Fiji.
Ferroelectricity induced by acentric spin-density waves in YMn$_2$O$_5$
Creators: name: Chapon, L. C.
name: Radaelli, P. G.
name: Blake, G. R.
name: Park, S.
name: Cheong, S-W.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The commensurate and incommensurate magnetic structures of the magnetoelectric system YMn$_{2}$O$_{5}$, as determined from neutron diffraction, were found to be spin-density waves lacking a global center of symmetry. We propose a model, based on a simple magneto-elastic coupling to the lattice, which enables us to predict the polarization based entirely on the observed magnetic structure. Our data accurately reproduce the temperature-dependence of the spontaneous polarization, in particular its sign reversal at the commensurate-incommensurate transition.
description: 10 pages, 3 figures, 1 table
Infusão tecnológica na oferta educativa do Centro Ciência Viva do Algarve
Creators: name: Reis, Emanuel
name: Colaço, Ana
name: Miguel, Carlos
name: Veiga-Pires, Cristina
name: Ferreira, Clara
name: Dias, Filipe
name: Oliveira, Jorge
name: Gonçalves, Luís
name: Rodrigues, Miguel
name: Romão, Mónica
name: Gomes, Tiago
name: kisarauské, Vaiva
Publisher: name: Zenodo
Year: 2017

description: Estatutariamente ”o Centro de Ciência Viva do Algarve (CCVAlg) tem por objeto o exercício da divulgação científica e tecnológica mediante a promoção da cultura científica e tecnológica junto da população e, em especial, junto da comunidade juvenil.” Numa sociedade (e ciência) cada vez mais digital, a utilização de ferramentas e canais tecnológicos para levar a cabo essa missão não pode ser desprezada, sob pena de dar uma visão amputada e obsoleta da realidade face às técnicas e metodologias a que comunidade científica do século XXI recorre. Fruto de uma parceria recentemente estabelecida com a empresa JP.Group, o Centro Ciência Viva do Algarve, tem vindo a incluir em diversas atividades que compõem a sua oferta educativa a utilização de 10 equipamentos portáteis do tipo tablet detachable que lhe foram oferecidos. Apenas quatro meses após o início da utilização destes equipamentos com público, cerca de quatro centenas de jovens já participaram em atividades lúdico cientificas dinamizadas pelos vários elementos da equipa e realizadas em contextos de ensino não formal e informal. A presente comunicação pretende dar a conhecer a metodologia desenhada para a integração dos equipamentos recebidos na oferta educativa do Centro, as atividades com o público já realizadas durante os primeiros 4 meses do projeto, os impactos já visíveis resultantes dessa introdução, bem como antecipar novas atividades e metodologias inovadoras de utilização dos equipamentos em Centros de Ciência cuja introdução está a ser preparada pela equipa do CCVAlg.
description: Acknowledgement to JP.group for providing the equipment
Integrable Open Spin Chains and the Doubling Trick in N = 2 SYM with Fundamental Matter
Creators: name: Erler, Theodore G.
name: Mann, Nelia
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We demonstrate that the one-loop anomalous dimension matrix in N = 2 SYM with a single chiral hypermultiplet of fundamental matter, which is dual to AdS_5 X S^5 with a D7-brane filling AdS_5 and wrapped around an $^3 in the S^5, is an integrable open spin chain Hamiltonian. We also use the doubling trick to relate these open spin chains to closed spin chains in pure N = 4 SYM. By using the AdS/CFT correspondence, we find a relation between the corresponding open and closed strings that differs from a simple doubling trick by terms that vanish in the semiclassical limit. We also demonstrate that in some cases the closed string is simpler and easier to study than the corresponding open string, and we speculate on the nature of corrections due to the presence of D-branes that this implies.
description: 30 pages, 14 figures
Text: Autobiography
Creators: name: Quenamá Lucitante, Graciela
name: Dabkowski, Maksymilian
name: Aguinda, Shen
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: con

description: The story of her uncles and aunts, the story of a shaman who had a lot of power, how they went to live in Dovuno, her infancy, and how she met her husband, they went on to live in Dureno, and then in Sinangoé.
Determining the proton content with a quantum computer
Creators: name: Pérez-Salinas, Adrián
name: Cruz-Martinez, Juan
name: Alhajri, Abdulla A.
name: Carrazza, Stefano
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We present a first attempt to design a quantum circuit for the determination of the parton content of the proton through the estimation of parton distribution functions (PDFs), in the context of high energy physics (HEP). The growing interest in quantum computing and the recent developments of new algorithms and quantum hardware devices motivates the study of methodologies applied to HEP. In this work we identify architectures of variational quantum circuits suitable for PDFs representation (qPDFs). We show experiments about the deployment of qPDFs on real quantum devices, taking into consideration current experimental limitations. Finally, we perform a global qPDF determination from collider data using quantum computer simulation on classical hardware and we compare the obtained partons and related phenomenological predictions involving hadronic processes to modern PDFs.
description: 13 pages, 14 figures, 4 tables, accepted for publication in PRD, code available at https://github.com/Quantum-TII/qibo
The Effects of Alfven Waves and Radiation Pressure in Dusty Winds of Late-Type Stars. II. Dust-Cyclotron Damping
Creators: name: Vidotto, A. A.
name: Jatenco-Pereira, V.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: There are in the literature several theories to explain the mass loss in stellar winds. In particular, for late-type stars, some authors have proposed a wind model driven by an outward-directed flux of damped Alfven waves. The winds of these stars present great amounts of dust particles that, if charged, can give rise to new wave modes or modify the pre-existing ones. In this work, we study how the dust can affect the propagation of Alfven waves in these winds taking into account a specific damping mechanism, dust-cyclotron damping. This damping affects the Alfven wave propagation near the dust-cyclotron frequency. Hence, if we assume a dust size distribution, the damping occurs over a broad band of wave frequencies. In this work, we present a model of Alfven wave-driven winds using the dust-cyclotron damping mechanism. On the basis of coronal holes in the Sun, which present a superradial expansion, our model also assumes a diverging geometry for the magnetic field. Thus, the mass, momentum, and energy equations are obtained and then solved in a self-consistent approach. Our results of wind velocity and temperature profiles for a typical K5 supergiant star shows compatibility with observations. We also show that, considering the presence of charged dust particles, the wave flux is less damped due to the dust-cyclotron damping than it would be if we consider some other damping mechanisms studied in the literature, such as nonlinear damping, resonant surface damping, and turbulent damping.
description: 10 pages, 5 figures. ApJ, vol. 639, pp 416-422. Minor changes in the text
The CALYPSO IRAM-PdBI survey of jets from Class 0 protostars. Are jets ubiquitous in young stars ?
Creators: name: Podio, L.
name: Tabone, B.
name: Codella, C.
name: Gueth, F.
name: Maury, A.
name: Cabrit, S.
name: Lefloch, B.
name: Maret, S.
name: Belloche, A.
name: André, P.
name: Anderl, S.
name: Gaudel, M.
name: Testi, L.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: As a part of the CALYPSO large programme, we constrain the properties of protostellar jets and outflows in a sample of 21 Class 0 protostars with internal luminosities, Lint, from 0.035 to 47 Lsun. We analyse high angular resolution (~0.5"-1") IRAM PdBI observations in CO (2-1), SO ($5_6-4_5$), and SiO (5-4). CO (2-1), which probes outflowing gas, is detected in all the sources (for the first time in SerpS-MM22 and SerpS-MM18b). Collimated high-velocity jets in SiO (5-4) are detected in 67% of the sources (for the first time in IRAS4B2, IRAS4B1, L1448-NB, SerpS-MM18a), and 77% of these also show jet/outflow emission in SO ($5_6-4_5$). In 5 sources (24% of the sample) SO ($5_6-4_5$) probes the inner envelope and/or the disk. The CALYPSO survey shows that the outflow phenomenon is ubiquitous and that the detection rate of high-velocity jets increases with protostellar accretion, with at least 80% of the sources with Lint>1 Lsun driving a jet. The protostellar flows exhibit an onion-like structure, where the SiO jet (opening angle ~10$^o$) is nested into a wider angle SO (~15$^o$) and CO (~25$^o$) outflow. On scales >300 au the SiO jets are less collimated than atomic jets from Class II sources (~3$^o$). Velocity asymmetry between the two jet lobes are detected in one third of the sources, similarly to Class II atomic jets, suggesting that the same launching mechanism is at work. Most of the jets are SiO rich (SiO/H2 from >2.4e-7 to >5e-6), which indicates efficient release of >1%-10% of silicon in gas phase likely in dust-free winds, launched from inside the dust sublimation radius. The mass-loss rates (from ~7e-8 to ~3e-6 Msun/yr) are larger than what was measured for Class II jets. Similarly to Class II sources, the mass-loss rates are ~1%-50% of the mass accretion rates suggesting that the correlation between ejection and accretion in young stars holds from 1e4 yr up to a few Myr.
description: Accepted for publication by A&A, 40 pages, 7 figures + appendixes
Discrete Symmetry and CP Phase of the Quark Mixing Matrix
Creators: name: Chen, Shao-Long
name: Ma, Ernest
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A simple specific pattern of the two 3 X 3 quark mass matrices is proposed, resulting in a prediction of the CP phase of the charged-current mixing matrix V_CKM, i.e. sin 2 phi_1 (beta) = 0.733, which is in remarkable agreement with data, i.e. sin 2 phi_1 = 0.728 +/- 0.056 +/- 0.023 from Belle and sin 2 beta = 0.722 +/- 0.040 +/- 0.023 from Babar. This pattern can be maintained by a discrete family symmetry, an example of which is D_7, the symmetry group of the heptagon.
description: 9 pages, no figure
Statistical and dynamical aspects in the decay of hot neutron-rich nuclei
Creators: name: Veselsky, M.
name: Keksis, A. L.
name: Souliotis, G. A.
name: Wang, K.
name: Bell, E.
name: Shetty, D. V.
name: Jandel, M.
name: Yennello, S. J.
name: Ma, Y. G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: The signal of isospin-asymmetric phase transition in the evolution of the chemical potential was observed for hot quasi-projectiles produced in the reactions 40,48Ca + 27Al confirming an analogous observation in the lighter system 28Si + 112,124Sn. With increasing mass, the properties of hot quasi-projectiles become increasingly influenced by the secondary emission. Thermodynamical observables exhibit no sensitivity to the different number of missing neutrons in the two reactions 40,48Ca + 27Al, thus providing a signal of dynamical emission of neutrons, which can be related to formation of a very neutron-rich low-density region (neck) between the projectile and target.
description: LaTeX, article expanded, 2 figures added, 17 pages, 7 figures
Polarization relaxation in thin-film relaxors compared to that in ferroelectrics
Creators: name: Tyunina, M.
name: Levoska, J.
name: Jaakola, I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Epitaxial thin films of relaxor PbMg1/3Nb2/3O3 and PbSc0.5Nb0.5O3, and ferroelectric PbZr0.65Ti0.35O3, Pb0.955La0.045Zr0.65Ti0.35O3, and Ba0.4Sr0.6TiO3 were prepared, and their dielectric properties were studied in a broad range of the measurement conditions. In the ferroelectric state, the presence and the change of configuration of the domains determined both the dynamic dielectric nonlinearity and the polarization hysteresis. In thin-film relaxors, the orientation of the randomly interacting dipoles in a random field was responsible for the dynamic dielectric nonlinearity, while the observed hysteresis was suggested to arise due to connection between the applied field and the relaxation times of both the dipoles and the internal field. In thin-film (Ba,Sr)TiO3, the high-temperature dielectric hysteresis was found to be relaxorlike.
description: 20 pages, 10 figures, submitted to Phys. Rev. B 17.03.2006
Anisotropy of mechanical properties in a hot-pressed boron carbide
Creators: Farbaniec, Lukasz
Hogan, James D.
McCauley, James W.
Ramesh, Kaliat T.
Publisher: name: University of Alberta Library
Year: 2016

Effects of microstructure and material properties on the mechanical behavior of hot-pressed boron carbide are presented. The microstructure and intrinsic microstructural inhomogeneities have been characterized using scanning electron

microscopy characterization techniques (SEM/EDS/EBSD). In-situ mechanical characterizations of the boron carbide microstructure and its larger inhomogeneities have been performed by nanoindentation. Macroscopic dynamic

and quasi-static compressive responses have been studied in two characteristic orientations (parallel and perpendicular to the hot-pressing direction) using a modied compression Kolsky bar setup (strain rates of 102 { 103 s{1) and standard MTS test machine (strain rates of 10{4 { 10{3 s{1). The microstructure characterization showed that boron carbide has a ne-grained microstructure with a complex superposition of non-metallic inclusions, such as free carbon, AlN and BN. Nanoindentation tests conducted in three principal planes of the plate revealed an anisotropy of the mechanical properties. The compression

tests revealed that the strength of this hot-pressed boron carbide is orientation-dependent. Detailed SEM analysis indicated transgranular fracture and micro-cracking originating at large carbon inclusions. Influences of microstructural anisotropy on the mechanical response of the material is discussed.
Information-Theoretic Multi-Objective Bayesian Optimization with Continuous Approximations
Creators: name: Belakaria, Syrine
name: Deshwal, Aryan
name: Doppa, Janardhan Rao
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (stat.ML)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Many real-world applications involve black-box optimization of multiple objectives using continuous function approximations that trade-off accuracy and resource cost of evaluation. For example, in rocket launching research, we need to find designs that trade-off return-time and angular distance using continuous-fidelity simulators (e.g., varying tolerance parameter to trade-off simulation time and accuracy) for design evaluations. The goal is to approximate the optimal Pareto set by minimizing the cost for evaluations. In this paper, we propose a novel approach referred to as information-Theoretic Multi-Objective Bayesian Optimization with Continuous Approximations (iMOCA)} to solve this problem. The key idea is to select the sequence of input and function approximations for multiple objectives which maximize the information gain per unit cost for the optimal Pareto front. Our experiments on diverse synthetic and real-world benchmarks show that iMOCA significantly improves over existing single-fidelity methods.
Scalable Models For Probabilistic Forecasting With Fuzzy Time Series
Creators: name: Silva, Petrônio Cândido De Lima E
Publisher: name: Zenodo
Year: 2019
Subjects: subject: Fuzzy Time Series
subject: Probabilistic Forecasting
subject: Interval Forecasting
subject: Scalable Models
subject: 10.5281/zenodo.597359
subject: 10.1109/TFUZZ.2019.2922152
subject: 10.21528/CBIC2017-54
subject: 10.1109/SSCI.2016.7850010
subject: 10.1109/FUZZ-IEEE.2017.8015732
subject: 10.1007/978-3-030-19223-5_4

description: In the field of time series forecasting, the most known methods are based on pointforecasting. However, this kind of forecasting has a serious drawback: it does not quantifythe uncertainties inherent to natural and social processes neither other uncertaintiescaused by the data gathering and processing. Because this in last years the interval andprobabilistic forecasting methods have been gaining more attention of researches, speciallyon environmental and economical sciences. But these techniques also have their own issuesdue to the methods being black-boxes and requiring stochastic simulations and ensemblesof multiple forecasting methods which are computationally expensive.On the other hand, the data volume (number of instances) and dimensionality (numberof variables) have reached magnitudes even greater, due to the commoditizing of thecapturing and storing computational devices, in a phenomenon known as Big Data. Suchfactors impact directly on the model’s training and updating costs, and for time serieswith Big Data characteristics, the scalability became a decisive factor in the choosing ofpredictive methods.In this context the Fuzzy Time Series (FTS) methods emerge, which have been growing inrecent years due to their accurate results, easiness of implementation, low computationalcost and model explainability. The Fuzzy Time Series methods have been applied toforecast electric load, market assets, economical indicators, tourism demand etc. But thereis a lack on FTS literature regarding interval and probabilistic forecasting.This thesis proposes new scalable Fuzzy Time Series methods and discusses its applicationto point, interval and probabilistic forecasting of mono and multivariate time series, for oneto many steps ahead. The parameters and hyper-parameters are discussed and fine tunningalternatives are presented. Finally the proposed methods are compared with the mainFuzzy Time Series techniques and other literature approaches using environmental andstock market data. The proposed methods obtained promising results on point, intervaland probabilistic forecasting and presented low computational cost, making it useful for awide range of applications.
Leveraging Multi-Model Expertise and AI for Autonomous System Management (Meta-Model Architecture)
Creators: name: Piyush Mishra
Publisher: name: Zenodo
Year: 2024
Subjects: Meta-Model, Sub-Models, Reinforcement Learning (RL), Artificial Intelligence (AI), Language Models, Specialization, Contextual Understanding, Communication Framework, Dynamic Model Selection, Continuous Learning, Expertise Enhancement, Contextual Intelligence, User Interaction, Real-time Decision Making, Adaptability, Problem-Solving Paradigm, Ecosystem of Learning, Interdisciplinary Collaboration, Digital Landscape, Synergy.

description: Modern system management demands intelligent and adaptive solutions to handle the complexities of diverse tasks efficiently. This research introduces an innovative AI-driven system designed to oversee, analyze, and execute tasks within a system environment. The system integrates multi-model expertise, enabling autonomous decision-making and efficient management of varied tasks.
Tidal Destruction of The First Dark Microhalos
Creators: name: Zhao, HongSheng
name: Hooper, Dan
name: Angus, Garry W.
name: Taylor, James E.
name: Silk, Joseph
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We point out that the usual self-similarity in cold dark matter models is broken by encounters with individual normal galactic stars on sub-pc scale. Tidal heating and stripping must have redefined the density and velocity structures of the population of the Earth-mass dark matter halos, which are likely to have been the first bound structures to form in the Universe. The disruption rate depends strongly on {\it galaxy types} and the orbital distribution of the microhalos; in the Milky Way, stochastic radial orbits are destroyed first by stars in the triaxial bulge, microhalos on non-planar retrograde orbits with large pericenters and/or apocenters survive the longest. The final microhalo distribution in the {\it solar neighborhood} is better described as a superposition of filamentry microstreams rather than as a set of discrete spherical clumps in an otherwise homogeneous medium. We discuss its important consequences to our detections of microhalos by direct recoil signal and indirect annihilation signal.
description: 13 pages, 3 figures, Astrophysical Journal, accepted
Scalable Models For Probabilistic Forecasting With Fuzzy Time Series
Creators: name: Silva, Petrônio Cândido De Lima E
Publisher: name: Zenodo
Year: 2019
Subjects: Fuzzy Time Series
Probabilistic Forecasting
Interval Forecasting
Scalable Models

description: In the field of time series forecasting, the most known methods are based on pointforecasting. However, this kind of forecasting has a serious drawback: it does not quantifythe uncertainties inherent to natural and social processes neither other uncertaintiescaused by the data gathering and processing. Because this in last years the interval andprobabilistic forecasting methods have been gaining more attention of researches, speciallyon environmental and economical sciences. But these techniques also have their own issuesdue to the methods being black-boxes and requiring stochastic simulations and ensemblesof multiple forecasting methods which are computationally expensive.On the other hand, the data volume (number of instances) and dimensionality (numberof variables) have reached magnitudes even greater, due to the commoditizing of thecapturing and storing computational devices, in a phenomenon known as Big Data. Suchfactors impact directly on the model’s training and updating costs, and for time serieswith Big Data characteristics, the scalability became a decisive factor in the choosing ofpredictive methods.In this context the Fuzzy Time Series (FTS) methods emerge, which have been growing inrecent years due to their accurate results, easiness of implementation, low computationalcost and model explainability. The Fuzzy Time Series methods have been applied toforecast electric load, market assets, economical indicators, tourism demand etc. But thereis a lack on FTS literature regarding interval and probabilistic forecasting.This thesis proposes new scalable Fuzzy Time Series methods and discusses its applicationto point, interval and probabilistic forecasting of mono and multivariate time series, for oneto many steps ahead. The parameters and hyper-parameters are discussed and fine tunningalternatives are presented. Finally the proposed methods are compared with the mainFuzzy Time Series techniques and other literature approaches using environmental andstock market data. The proposed methods obtained promising results on point, intervaland probabilistic forecasting and presented low computational cost, making it useful for awide range of applications.
description: This thesis is under evaluation of the board of referees.
Electroweak gauge fields, particles, and antiparticles arise from probability
Creators: name: Quznetsov, G.
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: Probabilities of events are expressed by the spinor functions and by operators of a probability creation and by operators of a probability annihilation. The motion equations in form of the Dirac equations with the additional fields are obtained for these spinor functions. Some of these additional fields behave as the gauge fields and others behave as the mass members. Such motion equations, contained all five elements of Clifford's pentad, is invariant for the electroweak gauge transformations. The creation operators and the annihilation operators of particles and antiparticles obtained from these probabilistic functions. The motion equation of the U(2) Yang-Mills field components is formulated similarly to the Klein-Gordon equation with the nonzero mass.
description: 28 pages, no figures. This is a slightly corrected version of the article, published in Annales de la Fondation Louis de Broglie Volume 29 numero Hors serie 2, 2004
Patterns of primary beam non-redundancy in close-packed 21 cm array observations
Creators: name: Choudhuri, Samir
name: Bull, Philip
name: Garsden, Hugh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Radio interferometer arrays such as HERA consist of many close-packed dishes arranged in a regular pattern, giving rise to a large number of `redundant' baselines with the same length and orientation. Since identical baselines should see an identical sky signal, this provides a way of finding a relative gain/bandpass calibration without needing an explicit sky model. In reality, there are many reasons why baselines will not be exactly identical, giving rise to a host of effects that spoil the redundancy of the array and induce spurious structure in the calibration solutions if not accounted for. In this paper, we seek to build an understanding of how differences in the primary beam response between antennas affect redundantly-calibrated interferometric visibilities and their resulting frequency (delay-space) power spectra. We use simulations to study several generic types of primary beam variation, including differences in the width of the main lobe, the angular and frequency structure of the sidelobes, and the beam ellipticity and orientation. For all of these types, we find that additional temporal structure is induced in the gain solutions, particularly when bright point sources pass through the beam. In comparison, only a low level of additional spectral structure is induced. The temporal structure modulates the cosmological 21cm power spectrum, but only at the level of a few percent in our simulations. We also investigate the possibility of signal loss due to decoherence effects when non-redundant visibilities are averaged together, finding that the decoherence is worst when bright point sources pass through the beam, and that its magnitude varies significantly between baseline groups and types of primary beam variation. Redundant calibration absorbs some of the decoherence effect however, reducing its impact compared to if the visibilities were perfectly calibrated.
description: 22 pages, 19 figures, accepted for publication in MNRAS
Text: Hunting and fishing
Creators: name: Umenda, Bautista
name: Dabkowski, Maksymilian
name: Quenamá, Leidy
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: con

description: The ancestors used to hunt with blowguns and spears, and fish with fishing nets, while nowadays people hunt and fish with other implements, such as rifles, dynamite, and poison. In the past there were fish aplenty, but it is no longer so.
Lagrangian Formalism for nonlinear second-order Riccati Systems: one-dimensional Integrability and two-dimensional Superintegrability
Creators: name: Cariñena, José F.
name: Rañada, Manuel F.
name: Santander, Mariano
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 37J35

description: The existence of a Lagrangian description for the second-order Riccati equation is analyzed and the results are applied to the study of two different nonlinear systems both related with the generalized Riccati equation. The Lagrangians are nonnatural and the forces are not derivable from a potential. The constant value $E$ of a preserved energy function can be used as an appropriate parameter for characterizing the behaviour of the solutions of these two systems. In the second part the existence of two--dimensional versions endowed with superintegrability is proved. The explicit expressions of the additional integrals are obtained in both cases. Finally it is proved that the orbits of the second system, that represents a nonlinear oscillator, can be considered as nonlinear Lissajous figures
description: 25 pages, 7 figures
Quantum Forbidden-Interval Theorems for Stochastic Resonance
Creators: name: Wilde, Mark M.
name: Kosko, Bart
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We extend the classical forbidden-interval theorems for a stochastic-resonance noise benefit in a nonlinear system to a quantum-optical communication model and a continuous-variable quantum key distribution model. Each quantum forbidden-interval theorem gives a necessary and sufficient condition that determines whether stochastic resonance occurs in quantum communication of classical messages. The quantum theorems apply to any quantum noise source that has finite variance or that comes from the family of infinite-variance alpha-stable probability densities. Simulations show the noise benefits for the basic quantum communication model and the continuous-variable quantum key distribution model.
description: 13 pages, 2 figures
Full counting statistics of the currents through a Kitaev chain and the exchange fluctuation theorem
Creators: name: Zhang, Fan
name: Quan, H. T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Exchange fluctuation theorems (XFTs) describe a fundamental symmetry relation for particle and energy exchange between several systems. Here we study the XFTs of a Kitaev chain connected to two reservoirs in the same temperature but different bias. By varying the parameters in the Kitaev chain model, we calculate analytically the full counting statistics of the transport current and formulate the corresponding XFTs for multiple current components. We also demonstrate the XFTs with numerical results. We find that due to the presence of the U(1) symmetry breaking terms in the Hamiltonian of the Kitaev chain, various forms of the XFTs emerge, and they can be interpreted in terms of various well-known transport processes.
Galaxy Morphologies in the Hubble Ultra Deep Field: Dominance of Linear Structures at the Detection Limit
Creators: name: Elmegreen, Debra Meloy
name: Elmegreen, Bruce G.
name: Rubin, Douglas S.
name: Schaffer, Meredith A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Galaxies in the Hubble Ultra Deep Field (UDF) larger than 10 pixels (0.3 arcsec) have been classified according to morphology and their photometric properties are presented. There are 269 spirals, 100 ellipticals, 114 chains, 126 double-clump, 97 tadpole, and 178 clump-cluster galaxies. We also catalogued 30 B-band and 13 V-band drop-outs and calculated their star formation rates. Chains, doubles, and tadpoles dominate the other types at faint magnitudes. The fraction of obvious bars among spirals is ~10 percent, a factor of 2-3 lower than in other deep surveys. The distribution function of axial ratios for elliptical galaxies is similar to that seen locally, suggesting that ellipticals relaxed quickly to a standardized shape. The distribution of axial ratios for spiral galaxies is significantly different than locally, having a clear peak at ~0.55 instead of a nearly flat distribution. The fall-off at small axial ratio occurs at a higher value than locally, indicating thicker disks by a factor of ~2. The fall-off at high axial ratio could be from intrinsic triaxial shapes or selection effects. Inclined disks should be more highly sampled than face-on disks near the surface brightness limit of a survey. Simple models and data distributions demonstrate these effects. The decreased numbers of obvious spiral galaxies at high redshifts could be partly the result of surface brightness selection.
description: 29 pages, 12 figures, ApJ in press, 20 Sept 2005, Vol 631
Meta-Model Architecture
Creators: name: Mishra, Piyush
Publisher: name: Zenodo
Year: 2023
Subjects: Meta-Model, Sub-Models, Reinforcement Learning (RL), Artificial Intelligence (AI), Language Models, Specialization, Contextual Understanding, Communication Framework, Dynamic Model Selection, Continuous Learning, Expertise Enhancement, Contextual Intelligence, User Interaction, Real-time Decision Making, Adaptability, Problem-Solving Paradigm, Ecosystem of Learning, Interdisciplinary Collaboration, Digital Landscape, Synergy.

description: The architecture for the Meta-Model Architecture
Binaries Like to be Twins: Implications for Doubly Degenerate Binaries, the Supernova Ia Rate and Other Interacting Binaries
Creators: name: Pinsonneault, M. H.
name: Stanek, K. Z.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The recent sample of 21 detached eclipsing binaries in the Small Magellanic Cloud (Harries et al. 2003, Hilditch et al. 2005) provides a valuable test of the binary mass function for massive stars. We show that 50% of detached binaries have companions with very similar masses, q=M_2/M_1 > 0.87, where M_1, M_2 denote the masses of the two binary components, M_1 > M_2. A Salpeter relative mass function for the secondary is very strongly excluded, and the data is consistent with a flat mass function containing 55% of the systems and a ``twin'' population with q>0.95 containing the remainder. We also survey the vast existing literature discussing the mass ratio in binaries and conclude that a significant twin population (of more than 20-25%) exists in binaries that are likely to interact across a broad range of stellar masses and metallicity. Interactions involving nearly equal mass stars have distinctly different properties than those involving stars of unequal mass; the secondaries will tend to be evolved and the common envelope evolution is qualitatively different. The implications of such a population for both binary interactions and star formation are substantial, and we present some examples. We argue that twin systems may provide a natural stellar population to explain the recently proposed prompt channel for type Ia SN, and the presence of a twin population dramatically reduces the maximum inferred NS+BH merger rate relative to the NS+NS merger rate. Twins may also be important for understanding the tendency of WD and NS binaries to be nearly equal in mass, and inclusion of twins in population studies will boost the blue straggler production rate.
description: 14 pages, 2 figures, ApJL, submitted