cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Felis: Identifying Opportunities for Change
Creators: name: Lucarelli, Theresa Marie
Publisher: name: Digital Repository at the University of Maryland
Year: 2014
Subjects: subject: Architecture
subject: FOS: Civil engineering
subject: Animal behavior
subject: Design
subject: cats
subject: design
subject: feline
subject: humans

description: Although many cats are loved and well cared for by enthusiastic and compassionate owners, tens of millions of cats suffer from human neglect and ignorance, leading to low adoption rates and high euthanasia numbers across the world.  Of all cats that enter shelters, 70 percent are euthanized.  In addition to the millions of cats that reside in shelters, there are approximately 50 million stray and feral cats, compared to 76 million pet cats in the United States.

This thesis serves to identify, understand, and analyze the diverse roles cats play in the lives of humans and general ecological well-being.  It is necessary to critically and creatively analyze the human relationship to cats throughout history, as well as how contemporary architecture and urbanism has and is continuing to do cats a disservice through an inattention to and neglect of their needs.  The central question I will seek to address is: How can accommodations be designed to provide spaces that promote a happy and healthy environment for cats and for humans and enhance the relationship between humans and cats?
On spatial extremes: with application to a rainfall problem
Creators: name: Buishand, T. A.
name: de Haan, L.
name: Zhou, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: We consider daily rainfall observations at 32 stations in the province of North Holland (the Netherlands) during 30 years. Let $T$ be the total rainfall in this area on one day. An important question is: what is the amount of rainfall $T$ that is exceeded once in 100 years? This is clearly a problem belonging to extreme value theory. Also, it is a genuinely spatial problem. Recently, a theory of extremes of continuous stochastic processes has been developed. Using the ideas of that theory and much computer power (simulations), we have been able to come up with a reasonable answer to the question above.
description: Published in at http://dx.doi.org/10.1214/08-AOAS159 the Annals of Applied Statistics (http://www.imstat.org/aoas/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Black strings in AdS_5
Creators: name: Bernamonti, Alice
name: Caldarelli, Marco M.
name: Klemm, Dietmar
name: Olea, Rodrigo
name: Sieg, Christoph
name: Zorzan, Emanuele
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present non-extremal magnetic black string solutions in five-dimensional gauged supergravity. The conformal infinity is the product of time and S^1xS_h, where S_h denotes a compact Riemann surface of genus h. The construction is based on both analytical and numerical techniques. We compute the holographic stress tensor, the Euclidean action and the conserved charges of the solutions and show that the latter satisfy a Smarr-type formula. The phase structure is determined in the canonical ensemble, and it is shown that there is a first order phase transition from small to large black strings, which disappears above a certain critical magnetic charge that is obtained numerically. For another particular value of the magnetic charge, that corresponds to a twisting of the dual super Yang-Mills theory, the conformal anomalies coming from the background curvature and those arising from the coupling to external gauge fields exactly cancel. We also obtain supersymmetric solutions describing waves propagating on extremal BPS magnetic black strings, and show that they possess a Siklos-Virasoro reparametrization invariance.
description: 40 pages, 7 figures, JHEP3. v2: minor corrections, 2 references added. v3: typos in holographic stress tensor corrected, 3 references added
Revealing hidden magneto-electric multipoles using Compton scattering
Creators: name: Bhowal, Sayantika
name: Spaldin, Nicola A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Magneto-electric multipoles, which are odd under both space-inversion $\cal I$ and time-reversal $\cal T$ symmetries, are fundamental in understanding and characterizing magneto-electric materials. However, the detection of these magneto-electric multipoles is often not straightforward as they remain "hidden" in conventional experiments in part since many magneto-electrics exhibit combined $\cal IT$ symmetry. In the present work, we show that the anti-symmetric Compton profile is a unique signature for all the magneto-electric multipoles, since the asymmetric magnetization density of the magneto-electric multipoles couples to space via spin-orbit coupling, resulting in an anti-symmetric Compton profile. We develop the key physics of the anti-symmetric Compton scattering using symmetry analysis and demonstrate it using explicit first-principles calculations for two well-known representative materials with magneto-electric multipoles, insulating LiNiPO$_4$ and metallic Mn$_2$Au. Our work emphasizes the crucial roles of the orientation of the spin moments, the spin-orbit coupling, and the band structure in generating the anti-symmetric Compton profile in magneto-electric materials.
A Digital Humanities Reading List: Part 3, Skill Building
Creators: name: LIBER Digital Humanities Working Group
name: Derven, Caleb
Publisher: name: Zenodo
Year: 2018
Subjects: digital humanities

description: From the LIBER DH Working Group, the recommended readings and tutorials in this blog post broadly focus on what skills are needed for providing DH services in libraries and how library staff can acquire these skills.
$W^+W^-H$ production through bottom quarks fusion at hadron colliders
Creators: name: Agrawal, Pankaj
name: Das, Biswajit
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: With the standard model working well in describing the collider data, the focus is now on determining the standard model parameters as well as for any hint of deviation. In particular, the determination of the couplings of the Higgs boson with itself and with other particles of the model is important to better understand the electroweak symmetry breaking sector of the model. In this letter, we look at the process $pp \to WWH$, in particular through the fusion of bottom quarks. Due to the non-negligible coupling of the Higgs boson with the bottom quarks, there is a dependence on the $WWHH$ coupling in this process. This sub-process receives largest contribution when the $W$ bosons are longitudinally polarized. We compute one-loop QCD corrections to various final states with polarized $W$ bosons. We find that the corrections to the final state with the longitudinally polarized $W$ bosons are large. It is shown that the measurement of the polarization of the $W$ bosons can be used as a tool to probe the $WWHH$ coupling in this process. We also examine the effect of varying $WWHH$ coupling in the $κ$-framework.
description: 17 pages, 7 figures
Separation and Loss: Sequential Traumatization and the Loss of Family Life Experienced among the Children of the Kindertransports
Creators: name: Stahl, Matthew Christian
Publisher: name: Digital Repository at the University of Maryland
Year: 2014
Subjects: subject: European history
subject: Holocaust studies
subject: Judaic studies
subject: children
subject: Emigration
subject: family life
subject: Kindertransport
subject: Nazi persecution
subject: trauma

description: Between December 1938 and September 1939, 10,000 Jewish children were evacuated from Nazi territory to the United Kingdom.  Approximately ninety percent of these children were never reunited with their families.  This thesis draws upon oral histories and memoirs of children from the Kindertransports in order to understand and analyze the traumas they experienced before fleeing from Nazi persecution and as a result of their separation from their parents as well as the factors that most influenced the long-term effects of this trauma.
Jet Properties of XTE J1752-223 During its 2009-2010 Outburst
Creators: name: Debnath, Dipak
name: Chatterjee, Kaushik
name: Chatterjee, Debjit
name: Jana, Arghajit
name: Chakrabarti, Sandip K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Galactic short orbital period black hole candidate (BHC) XTE~J1752-223 was discovered on 2009 Oct 21 by the Rossi X-ray Timing Explorer (RXTE). We study the spectral properties of this outburst using transonic flow solution based two component advective flow (TCAF) model. TCAF model fitted spectrum gives an estimation of the physical flow parameters, such as the Keplerian disk rate, sub-Keplerian halo rate, properties of the so-called {\it{Compton cloud}}, other than the mass of the source and normalization ($N$). $N$ is a standardized ratio of emitted to observed photon flux in TCAF which does not include X-ray emission from jets. In the presence of jets, this ratio changes and this deviation is used to obtain the estimation of X-ray contribution from the jets. Nature of the jet is found to be compact during low luminous hard state and discrete or blobby during high luminous intermediate states. We find a correlation between the radio (5.5 GHz) and X-ray ($2.5-25$ keV) fluxes from different components. The radio ($F_R$) and jet X-ray ($F_{ouf}$) fluxes are found to be correlated within the acceptable range of the standard correlation ($0.6$ to $0.7$). A similar correlation indices were reported by our group for three other short orbital period transient BHCs (Swift~J1753.5-0127, MAXI~J1836-194 \& XTE~J1118+480).
description: 12 Pages, 4 Figures, 3 Tables (Accepted for Publication in MNRAS)
Visually Grounded Multilingual Syntax Acquisition
Creators: name: Xing, Zhou
Publisher: name: University of Chicago
Year: 2021

description: Children are observed acquiring multiple languages simultaneously from birth without explicit instruction, and the course of development in each language looks very much like the trajectory followed by monolingual children. We try to simulate humans' syntax acquisition of simultaneous multilingualism via a modified Visually Grounded Neural Syntax Learner, an unsupervised neural network model for learning syntax representation. We incorporate a language classifier for the multilingual text corpus and introduce the predicted language label for each sentence to the training process of the VGNSL model. We train multilingual models using Flickr8k data with text in (English, French) or (English, tokenized Chinese). We find that compared to the monolingual model, the multilingual dataset makes the model less accurate for syntax parsing in each language, and more significantly in datasets with high word overlap, such as (English, French) language pairs. The improved version of the model with the introduction of language classifiers can improve the model's accuracy for syntax parsing in each language. However, it still falls short of the accuracy of the monolingual model. Thus it cannot fully simulate the learning performance of simultaneous multilingual children.
Estimation of economic losses due to milk fever and efficiency gains if prevented: evidence from Haryana, India
Creators: name: Cariappa, A. G. A.
name: Chandel, B. S.
name: Sankhala, G.
name: Mani, V.
name: Sendhil, R.
name: Dixit, A. K.
name: Meena, B. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: Calcium (Ca) requirement increases tenfold upon parturition in dairy cows & buffaloes and its deficiency leads to a condition called milk fever (MF). Estimation of losses is necessary to understand the depth of the problem and design preventive measures. How much is the economic loss due to MF? What will be the efficiency gain if MF is prevented at the advent of a technology? We answer these questions using survey data and official statistics employing economic surplus model. MF incidence in sample buffaloes and cows was 19% and 28%, respectively. Total economic losses were calculated as a sum total of losses from milk production, mortality of animals and treatment costs. Yearly economic loss due to MF was estimated to be INR 1000 crores (US$ 137 million) in Haryana. Value of milk lost had the highest share in total economic losses (58%), followed by losses due to mortality (29%) and treatment costs (13%). Despite lower MF incidence, losses were higher in buffaloes due to higher milk prices and market value of animals. The efficiency gain accruing to producers if MF is prevented, resulting from increased milk production at decreased costs was estimated at INR 10990 crores (US$ 1.5 billion). As the potential gain if prevented is around 10 times the economic losses, this study calls for the use of preventive technology against MF.
Photon asymmetry measurement in radiative muon capture on calcium-40
Creators: name: Pouladdej, Ali
Publisher: name: University of British Columbia
Year: 2010

description: A photon asymmetry measurement in radiative muon capture (RMC) on ⁴⁰Ca has been carried out in order to determine a value for the induced-pseudoscalar coupling constant (ցƿ), thereby allowing us to investigate the possible renormalisation effect for this coupling constant inside nuclear matter. Negative muons from the M20A channel at TRIUMF were stopped in a ⁴⁰Ca target. The resulting RMC photons were then converted by a 5 cm thick Nal converter placed immediately in front of our main detector, a Nal crystal of size 46 cm∅x51 cm. The purpose of the converter was to provide discrimination against the prolific high energy neutron background. From a fit to our time spectrum for the high-energy (57 MeV< E⋎ <95 MeV) photons, we were able to extract a value for the RMC photon asymmetry (⍺⋎). This time spectrum, with 5200 "clean" photons and a signal to noise ratio of ~7, showed the photon asymmetry quite clearly. With our measured value for the photon asymmetry: ⍺⋎ = 1.00±0.23, the predicted value of the induced-pseudoscalar coupling constant becomes: ցƿ = (0.0±⁸‧⁰₆․₇) ցA;, this range contains the (theoretical) unrenormalised value of Goldberger-Treiman: ցƿ ≈ 7 ցA⋅
Anomalous commutators and the BJL limit
Creators: name: Rogers, Duncan M.
Publisher: name: University of British Columbia
Year: 2010

description: The BJL limit is derived and used to calculate the anomalous vector current commutator in QED. It is then shown, by a calculation with the BJL limit for double commutators, that the Jacobi identity fails for two vector currents and one axial vector current in QED.
Indices of Social Development and their Application to Africa
Creators: name: Foa, Roberto Stefan
name: De Haan, Arjan
Publisher: name: United Nations University
Year: 2014
Subjects: Africa
Indices of Social Development
Social Inclusion
World Bank
Social Development

description: This paper, using a new set of social development indices, explores the measurement of social development across Africa, and how this relates to broader development patterns and measurement. Development practitioners worldwide increasingly recognize the importance of informal institutions, such as trust, associations and inclusion, and their impact on well-being, poverty, growth or aid effectiveness. However, there has been little empirical analysis that tests these relationships, largely because of data limitations. The Indices of Social Development, hosted by the International Institute of Social Studies is a large and innovative database of social development indicators to overcome such data constraints. They are based on over 200 measures from 25 data sources for the years 1990 to 2010, aggregated into six composite indices: civic activism, inter-personal safety and trust, inter-group cohesion, clubs and associations, gender equality, and inclusion of minorities. This paper presents how the database can be used to compare the Africa region to global patterns, analyse divergence across the continent, and explore the implications for our understanding of inclusive growth in Africa.
Writing foreign stardom under autarchy : affect, nationalism and the Americas in early Franquista Spanish culture
Creators: name: Norton, Diana Ruth
Publisher: name: The University of Texas at Austin
Year: 2018
Subjects: Transnational stardom
Transnational cinema
Popular culture
Francoism
Autarky
Censorship
Hispanidad

description: This dissertation questions the assumption that foreign films solely provided modes of escapism or opportunities to subvert societal norms under the early Franco regime. In essence, I show how complex political operations underlay the reception and marketing in Spain of foreign films and transnational star images. Using archival research, I examine the way that the Spanish press wrote about Hollywood and Latin American film actresses between 1945 and 1953, taking as case studies the star discourses of Joan Crawford, Dolores del Río, María Félix, Rita Hayworth, Carmen Miranda and Ava Gardner in Spain. In effect, the symbols of Spanish nationalism fostered by the Franco regime—including an imperialist notion of Hispanism—came to circulate in writings about these women, affectively associating the bodies of foreign actresses with the propaganda of the Franco regime. Drawing on the concept of ‘sticky associations’ developed by Sara Ahmed, I argue that these Francoist symbols came to adhere to the representations of American stars in state-controlled discourse, subtly reflecting the regime’s growing alignment with the US over the period in question. In this way, they allowed for the idea of the West as advanced by US postwar cultural imperialism to gain traction in Spain, despite the oft-cited critique of American morality. My project builds on important work in Spanish Cultural Studies, using affect theory to unite film, celebrity, transnational, and gender studies with history and international relations
Supplementary Material from Evidence of joint commitment in great apes' natural joint actions
Creators: name: Heesen, Raphaela
name: Zuberbühler, Klaus
name: Bangerter, Adrian
name: Iglesias, Katia
name: Rossano, Federico
name: Pajot, Aude
name: Guéry, Jean-Pascal
name: Genty, Emilie
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: 170299 Cognitive Science not elsewhere classified
subject: FOS: Psychology
subject: 60801 Animal Behaviour

description: Human joint action seems special, as it is grounded in joint commitment—a sense of mutual obligation participants feel towards each other. Comparative research with humans and nonhuman great apes has typically investigated joint commitment by experimentally interrupting joint actions to study subjects’ resumption strategies. However, such experimental interruptions are human-induced, and thus the question remains of how great apes naturally handle interruptions. Here, we focus on naturally occurring interruptions of joint actions, grooming and play, in bonobos and chimpanzees. Similar to humans, both species frequently resumed interrupted joint actions (and the previous behaviours, like grooming the same body part region or playing the same play type) with their previous partners and at the previous location. Yet, the probability of resumption attempts was unaffected by social bonds or rank. Our data suggest that great apes experience something akin to joint commitment, for which we discuss possible evolutionary origins.
Ferromagnetic resonance studies of DC magnetron sputtered CO-CR films
Creators: name: Ma, Changlin
Publisher: name: University of British Columbia
Year: 2010

description: The X-band FMR has been employed to investigate the angular variation of resonance Fields of DC sputtered Co-Cr Films with different substrate temperatures. This angular variation has been Fitted with the classical uniaxial anisotropy crystal model and yields the values of 2K₁/M-4πM=-4∼-7 KOe, 4K₂ =-0.8∼0.8 KOe and g-factor = 2.3~2.8. The FMR measurments of the first anisotropy constant are quite different from the counterparts measured with VSM. This discrepancy is interpreted as a result of the formation of two ferromagnetic phases. With this simple model, the substrate temperature dependence of First anisotropy is explained and it is predicted that a lower substrate temperature will improve the Co-Cr Films for their potential application in perpendicular magnetic recording devices. The angular dependence of the FMR linewidth is discussed.
Supplement.pdf
Creators: name: Nosita, Firda
Publisher: name: figshare
Year: 2025
Subjects: classificationCode: 350202
subject: Finance
classificationCode: 350205
subject: Household finance and financial literacy
classificationCode: 350208
subject: Investment and risk management

description: This is the questionnaire for the research titled "The Factors Influencing People to Invest in Ponzi Scheme: A Study in Indonesia"
BY-COVID D5.1 Enriched report viral variants and health outcomes
Creators: name: Van Goethem, Nina
name: Bernal-Delgado, Enrique
name: Estupiñán-Romero, Francisco
name: Meurisse, Marjan
Publisher: name: Zenodo
Year: 2024
Subjects: BY-COVID
COVID-19
Baseline Use Case
Heterogeneous real-world population data sources
Federated
Interoperability
BY-COVID demonstrator

description: BY-COVID Work Package (WP) 5 develops multiple use cases to address evolving research questions that arise during a pandemic, requiring data from multiple domains, sources, and countries. This evolving BY-COVID demonstrator is continuously enriched with new data, new evidence, and new hypotheses as part of Task 5.1. The use cases implemented in Task 5.2, Task 5.3 and Task 5.4 serve as concrete examples of adaptable and responsive workflows and methodologies designed to tackle the changing research challenges of a pandemic. 

The ‘Baseline Use Case’ developed in Task 5.2 provides a standard workflow, methodology and supporting technology that enables it to address any well-defined research question relevant for policy making. The proposed use case aims to demonstrate how mobilisation and linkage of heterogeneous real-world population data sources hosted at multiple sites can enhance the understanding of the direct and indirect effects of the pandemic on health outcomes in populations crossing jurisdictional borders. The proposed methodological framework provides guidance in the form of a systematic approach to address federated cross-national causal research questions in a privacy-preserving way, while tackling challenges at different layers of interoperability (legal, organisational, semantic, technical). This flexible workflow can evolve with new data types (e.g., socioeconomic and genomic), new data sources (e.g., registries, bio-samples, surveillance systems), new sites (e.g., other countries), and new hypotheses (e.g., COVID-19 Disease Maps).
Pressure-induced commensurate magnetic order in multiferroic $HoMn_2O_5$
Creators: name: Kimura, Hiroyuki
name: Nishihata, Keisuke
name: Noda, Yukio
name: Aso, Naofumi
name: Matsubayashi, Kazuyuki
name: Uwatoko, Yoshiya
name: Fujiwara, Tetsuya
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The pressure ($p$) -- temperature ($T$) phase diagram for microscopic magnetism in the multiferroic compound HoMn$_{2}$O$_{5}$ was established using neutron diffraction measurements under a hydrostatic pressure up to 1.25 GPa. At ambient pressure, incommensurate--commensurate--incommensurate magnetic phase transitions occur successively with decreasing temperature. Upon applying pressure, the incommensurate phase at the lowest temperature almost decreases and the commensurate phase appears. The $p$ -- $T$ phase diagram established shows excellent agreement with the recently reported $p$ -- $T$ dielectric phase diagram, where ferroelectricity is induced by applying pressure. We also found that the $p$ -- $T$ magnetic phase diagram is quite similar to the previously obtained magnetic field-temperature phase diagram.
description: 5 pages, 5 figures, to be published in J. Phys. Soc. Jpn
Supplemental Material from Female in-nest attendance predicts the number of ectoparasites in Darwin's finch species
Creators: name: Kleindorfer, Sonia
name: Common, Lauren K.
name: O'Connor, Jody A.
name: Garcia-Loor, Jefferson
name: Katsis, Andrew C.
name: Dudaniec, Rachael Y.
name: Colombelli-Négrel, Diane
name: Adreani, Nico M.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: 60801 Animal Behaviour
subject: FOS: Biological sciences

description: Selection should act on parental care and favour parental investment decisions that optimize the number of offspring produced. Such predictions have been robustly tested in predation risk contexts, but less is known about alternative functions of parental care under conditions of parasitism. The avian vampire fly (Philornis downsi) is a myasis-causing ectoparasite accidentally introduced to the Galápagos Islands, and one of the major mortality causes in Darwin's finch nests. With an 11-year dataset spanning 21 years, we examine the relationship between parental care behaviours and number of fly larvae and pupae in Darwin's finch nests. We do so across three host species (Camarhynchus parvulus, C. pauper, Geospiza fuliginosa) and one hybrid Camarhynchus group. Nests with longer female brooding duration (minutes per hour spent sitting on hatchlings to provide warmth) had fewer parasites, and this effect depended on male food delivery to chicks. Neither male age nor number of nest provisioning visits were directly associated with number of parasites. While the causal mechanisms remain unknown, we provide the first empirical study showing that female brooding duration is negatively related to the number of ectoparasites in nests. We predict selection for coordinated host male and female behaviour to reduce gaps in nest attendance, especially under conditions of novel and introduced ectoparasites.
Gauge-underdetermination and shades of locality in the Aharonov-Bohm effect
Creators: name: Mulder, Ruward A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: History and Philosophy of Physics (physics.hist-ph)
subject: FOS: Physical sciences

description: I address the view that the classical electromagnetic potentials are shown by the Aharonov-Bohm effect to be physically real (which I dub: 'the potentials view'). I give a historico-philosophical presentation of this view and assess its prospects, more precisely than has so far been done in the literature. Taking the potential as physically real runs prima facie into 'gauge-underdetermination': different gauge choices represent different physical states of affairs and hence different theories. I then illustrate this theme by what I take to be the basic insight of the AB effect for the potentials view, namely that the gauge equivalence class that directly corresponds to the electric and magnetic fields (which I call the Wide Equivalence Class) is too wide, i.e., the Narrow Equivalence Class encodes additional physical degrees of freedom: these only play a distinct role in a multiply-connected space. There is a trade-off between explanatory power and gauge symmetries. Although this narrower equivalence class gives a explanation in terms of `local interactions', locality is not satisfied in the sense of signal locality. It is therefore intellectually mandatory to seek desiderata that will distinguish even within these narrower equivalence classes, i.e. will prefer some elements of such an equivalence class over others. I consider various formulations of locality, such as Bell locality, local interaction Hamiltonians, and signal locality. I show that Bell locality can only be evaluated if one fixes the gauge freedom completely. Yet, an explanation in terms of signal locality can be accommodated by the Lorenz gauge: the potentials propagate in waves at finite speed. I therefore suggest the Lorenz gauge potentials theory -- an even narrower gauge equivalence relation -- as the ontology of electrodynamics.
description: Preprint (accepted for Foundations of Physics (Springer))
Commutative limit of a renormalizable noncommutative model
Creators: name: Magnen, Jacques
name: Rivasseau, Vincent
name: Tanasa, Adrian
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Renormalizable $ϕ^{\star 4}_4$ models on Moyal space have been obtained by modifying the commutative propagator. But these models have a divergent "naive" commutative limit. We explain here how to obtain a coherent such commutative limit for a recently proposed translation-invariant model. The mechanism relies on the analysis of the uv/ir mixing in general Feynman graphs.
description: 11 pages, 3 figures, minor misprints being corrected
Study of Close Stellar Encounters with the Solar System Based on Data from the Gaia EDR3 Catalogue
Creators: name: Bobylev, Vadim V.
name: Bajkova, Anisa T.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have studied stellar candidates for close (within 1 pc) encounters with the Solar system. For all of the stars under consideration the kinematic characteristics have been taken from the Gaia EDR3 catalogue. The parameters of the encounters of these stars with the Solar system have been calculated using three methods: (1) the linear one, (2) by integrating the orbits in an axisymmetric potential, and (3) by integrating the orbits in a potential with a spiral density wave. All three methods are shown to yield similar results. We have selected five stars that are good candidates for reaching the boundaries of the Oort cloud and passing through it. Based on the second method, in good agreement with the other two methods, we have obtained the following estimates of the encounter parameters for the star GJ 710: $t_{min}=1.320\pm0.028$ Myr and $d_{min}=0.020\pm0.007$ pc. It is also interesting to note the star Gaia EDR3 510911618569239040 with parameters $t_{min}=-2.863\pm0.046$ Myr and $d_{min}=0.057\pm0.079$ pc.
description: 10 pages, 4 tables and 0 figures. arXiv admin note: substantial text overlap with arXiv:2006.16555
Band-gap engineering, magnetic behavior and Dirac-semimetal character in the MoSi2N4 nanoribbon with armchair and zigzag edges
Creators: name: Bafekry, A.
name: Faraji, M.
name: Stampfl, C.
name: Sarsari, I. Abdolhosseini
name: Ziabari, A. Abdollahzadeh
name: Hieu, N. N.
name: Karbasizadeh, S.
name: Ghergherehchi, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Motivated by the recent successful formation of the MoSi2N4 monolayer [Hong et al., Sci. 369, 670 (2020)], the structural, electronic and magnetic properties of MoSi2N4 nanoribbons (NRs) is investigated for the first time . The band structure calculations showed spin-polarization in zigzag edges and a non-magnetic semiconducting character in armchair edges. For armchair-edges, we identify an indirect to direct band gap shift compared to the MoSi2N4 monolayer, and its energy gap increases with increasing NR width. Anisotropic electrical and magnetic behavior is observed via band structure calculations in the zigzag and armchair edges, where, surprisingly, for the one type of zigzag-edges configuration, we identify a Dirac-semimetal character. The appearance of magnetism and Dirac-semimetal in MoSi2N4 ribbon can give rise to novel physical properties, which could be useful in applications for next-generation electronic devices.
description: 6 pages, 5 figures
Metrics and isospectral partners for the most generic cubic PT-symmetric non-Hermitian Hamiltonian
Creators: name: Assis, Paulo E. G.
name: Fring, Andreas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate properties of the most general PT-symmetric non-Hermitian Hamiltonian of cubic order in the annihilation and creation operators as a ten parameter family. For various choices of the parameters we systematically construct an exact expression for a metric operator and an isospectral Hermitian counterpart in the same similarity class by exploiting the isomorphism between operator and Moyal products. We elaborate on the subtleties of this approach. For special choices of the ten parameters the Hamiltonian reduces to various models previously studied, such as to the complex cubic potential, the so-called Swanson Hamiltonian or the transformed version of the from below unbounded quartic -x^4-potential. In addition, it also reduces to various models not considered in the present context, namely the single site lattice Reggeon model and a transformed version of the massive sextic x^6-potential, which plays an important role as a toy modelto identify theories with vanishing cosmological constant.
description: 21 pages
0 from Female in-nest attendance predicts the number of ectoparasites in Darwin's finch species
Creators: name: Kleindorfer, Sonia
name: Common, Lauren K.
name: O'Connor, Jody A.
name: Garcia-Loor, Jefferson
name: Katsis, Andrew C.
name: Dudaniec, Rachael Y.
name: Colombelli-Négrel, Diane
name: Adreani, Nico M.
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: 60801 Animal Behaviour
subject: FOS: Biological sciences

description: Selection should act on parental care and favour parental investment decisions that optimize the number of offspring produced. Such predictions have been robustly tested in predation risk contexts, but less is known about alternative functions of parental care under conditions of parasitism. The Avian Vampire Fly (Philornis downsi) is a myasis-causing ectoparasite accidentally introduced to the Galápagos Islands, and one of the major mortality causes in Darwin's finch nests. With an 11-year dataset spanning 21 years, we examine the relationship between parental care behaviours and number of fly larvae and pupae in Darwin's finch nests. We do so across three host species (Camarhynchus parvulus, C. pauper, Geospiza fuliginosa) and one hybrid Camarhynchus group. Nests with longer female brooding duration (mins per hr spent sitting on hatchlings to provide warmth) had fewer parasites, and this effect depended on male food delivery to chicks. Neither male age nor number of nest provisioning visits were directly associated with number of parasites. While the causal mechanisms remain unknown, we provide the first empirical study showing that female brooding duration is negatively related to the number of ectoparasites in nests. We predict selection for coordinated host male and female behaviour to reduce gaps in nest attendance, especially under conditions of novel and introduced ectoparasites.
A soft X-ray study of Type I AGN observed with Chandra HETGS
Creators: name: McKernan, Barry
name: Yaqoob, Tahir
name: Reynolds, Chris
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of a uniform analysis of the soft X-ray spectra of fifteen type I AGN observed with the high resolution X-ray gratings on board \emph{Chandra}. We found that ten of the fifteen AGN exhibit signatures of an intrinsic ionized absorber. The absorbers are photoionized and outflowing, with velocities in the range $\sim 10^{1}-10^{3}$ km $\rm{s}^{-1}$. The column density of the warm absorbing gas is $\sim 10^{20-23} \rm{cm}^{-2}$. Nine of the ten AGN exhibiting warm absorption are best--fit by multiple ionization components and three of the ten AGN \emph{require} multiple kinematic components. The warm absorbing gas in our AGN sample has a wide range of ionization parameter, spanning roughly four orders of magnitude ($ξ\sim 10^{0-4}$ ergs cm $\rm{s}^{-1}$) in total, and often spanning three orders of magnitude in the same gas. Warm absorber components with ionization parameter $ξ<10$ generate an unresolved transition array due to Fe in seven of the ten AGN exhibiting warm absorption. These low ionization state absorbers may also carry away the largest mass outflows from the AGN. The mass outflow rate depends critically on the volume filling factor of the gas, which cannot yet be directly measured. However, upper limits on the mass outflow ratesfor filling factors of unity can be much greater than the expected accretion rate onto the central supermassive black hole and filling factors as small as 1% can give outflow rates comparable to the accretion rate. There appears to be a gap in the outflow velocities in our sample between $\sim 300-500$ km $\rm{s}^{-1}$, the origin of which is not clear. The outflow components with velocities below this gap tend to be associated with lower column densities than those with velocities above the gap.
description: MNRAS accepted, 17 pages
A transiting warm giant planet around the young active star TOI-201
Creators: name: Hobson, Melissa J.
name: Brahm, Rafael
name: Jordán, Andres
name: Espinoza, Nestor
name: Kossakowski, Diana
name: Henning, Thomas
name: Rojas, Felipe
name: Schlecker, Martin
name: Sarkis, Paula
name: Trifonov, Trifon
name: Thorngren, Daniel
name: Binnenfeld, Avraham
name: Shahaf, Sahar
name: Zucker, Shay
name: Ricker, George R.
name: Latham, David W.
name: Seager, S.
name: Winn, Joshua N.
name: Jenkins, Jon M.
name: Addison, Brett
name: Bouchy, Francois
name: Bowler, Brendan P.
name: Briegal, Joshua T.
name: Bryant, Edward M.
name: Collins, Karen A.
name: Daylan, Tansu
name: Grieves, Nolan
name: Horner, Jonathan
name: Huang, Chelsea
name: Kane, Stephen R.
name: Kielkopf, John
name: McLean, Brian
name: Mengel, Matthew W.
name: Nielsen, Louise D.
name: Okumura, Jack
name: Plavchan, Peter
name: Shporer, Avi
name: Smith, Alexis M. S.
name: Tilbrook, Rosanna
name: Tinney, C. G.
name: Twicken, Joseph D.
name: Udry, Stephane
name: Unger, Nicolas
name: West, Richard
name: Wittenmyer, Robert A.
name: Wohler, Bill
name: Wright, Duncan J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We present the confirmation of the eccentric warm giant planet TOI-201 b, first identified as a candidate in \textit{TESS} photometry (Sectors 1-8, 10-13, and 27-28) and confirmed using ground-based photometry from NGTS and radial velocities from FEROS, HARPS, CORALIE, and \textsc{Minerva}-Australis. TOI-201 b orbits a young ($\mathrm{0.87^{+0.46}_{-0.49} \, Gyr}$) and bright(V=9.07 mag) F-type star with a $\mathrm{52.9781 \, d}$ period. The planet has a mass of $\mathrm{0.42^{+0.05}_{-0.03}\, M_J}$, a radius of $\mathrm{1.008^{+0.012}_{-0.015}\, R_J}$, and an orbital eccentricity of $0.28^{+0.06}_{-0.09}$; it appears to still be undergoing fairly rapid cooling, as expected given the youth of the host star. The star also shows long-term variability in both the radial velocities and several activity indicators, which we attribute to stellar activity. The discovery and characterization of warm giant planets such as TOI-201 b is important for constraining formation and evolution theories for giant planets.
description: 21 pages, 11 figures, accepted to AJ
Coplanar Waveguide Resonators for Circuit Quantum Electrodynamics
Creators: name: Göppl, M.
name: Fragner, A.
name: Baur, M.
name: Bianchetti, R.
name: Filipp, S.
name: Fink, J. M.
name: Leek, P. J.
name: Puebla, G.
name: Steffen, L.
name: Wallraff, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We have designed and fabricated superconducting coplanar waveguide resonators with fundamental frequencies from 2 to $9 \rm{GHz}$ and loaded quality factors ranging from a few hundreds to a several hundred thousands reached at temperatures of $20 \rm{mK}$. The loaded quality factors are controlled by appropriately designed input and output coupling capacitors. The measured transmission spectra are analyzed using both a lumped element model and a distributed element transmission matrix method. The experimentally determined resonance frequencies, quality factors and insertion losses are fully and consistently characterized by the two models for all measured devices. Such resonators find prominent applications in quantum optics and quantum information processing with superconducting electronic circuits and in single photon detectors and parametric amplifiers.
description: 8 pages, 8 figures, version with high resolution figures available at http://qudev.ethz.ch/content/science/PubsPapers.html
Unquenching Effects on the Coefficients of the Lüscher-Weisz Action
Creators: name: Hao, Zh.
name: von Hippel, G. M.
name: Horgan, R. R.
name: Mason, Q. J.
name: Trottier, H. D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The effects of unquenching on the perturbative improvement coefficients in the Symanzik action are computed within the framework of Lüscher-Weisz on-shell improvement. We find that the effects of quark loops are surprisingly large, and their omission may well explain the scaling violations observed in some unquenched studies.
description: 7 pages, 5 eps figures, uses PoS.cls; talk presented at XXV International Symposium on Lattice Field Theory, July 30 - August 4 2007, Regensburg, Germany
A Two-Stage Attentive Network for Single Image Super-Resolution
Creators: name: Zhang, Jiqing
name: Long, Chengjiang
name: Wang, Yuxin
name: Piao, Haiyin
name: Mei, Haiyang
name: Yang, Xin
name: Yin, Baocai
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Recently, deep convolutional neural networks (CNNs) have been widely explored in single image super-resolution (SISR) and contribute remarkable progress. However, most of the existing CNNs-based SISR methods do not adequately explore contextual information in the feature extraction stage and pay little attention to the final high-resolution (HR) image reconstruction step, hence hindering the desired SR performance. To address the above two issues, in this paper, we propose a two-stage attentive network (TSAN) for accurate SISR in a coarse-to-fine manner. Specifically, we design a novel multi-context attentive block (MCAB) to make the network focus on more informative contextual features. Moreover, we present an essential refined attention block (RAB) which could explore useful cues in HR space for reconstructing fine-detailed HR image. Extensive evaluations on four benchmark datasets demonstrate the efficacy of our proposed TSAN in terms of quantitative metrics and visual effects. Code is available at https://github.com/Jee-King/TSAN.
Fully permanent magnet atom chip for Bose-Einstein condensation
Creators: name: Fernholz, T.
name: Gerritsma, R.
name: Whitlock, S.
name: Barb, I.
name: Spreeuw, R. J. C.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We describe a self-biased, fully permanent magnet atom chip used to study ultracold atoms and to produce a Bose-Einstein condensate (BEC). The magnetic trap is loaded efficiently by adiabatic transport of a magnetic trap via the application of uniform external fields. Radio frequency spectroscopy is used for in-trap analysis and to determine the temperature of the atomic cloud. The formation of a Bose-Einstein condensate is observed in time of flight images and as a narrow peak appearing in the radio frequency spectrum.
description: changed title, substantial text modifications, journal reference added
Shear dynamics of confined membranes
Creators: name: Goff, Thomas Le
name: To, Tung B. T.
name: Pierre-Louis, Olivier
Publisher: name: arXiv
Year: 2021
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We model the nonlinear response of a lubricated contact composed of a two-dimensional lipid membrane immersed in a simple fluid between two parallel flat and porous walls under shear. The nonlinear dynamics of the membrane gives rise to a rich dynamical behavior depending on the shear velocity. In quiescent conditions (i.e., absence of shear), the membrane freezes into a disordered labyrinthine wrinkle pattern. In the presence of shear, we find four different regimes depending on the shear rate. Regime I. For small shear, the labyrinthine pattern is still frozen, but exhibits a small drift which is mainly along the shear direction. In this regime, the tangential forces on the walls due to the presence of the membrane increase linearly with the shear rate. Regime II. When the shear rate is increased above a critical value, the membrane rearranges, and wrinkles start to align along the shear direction. This regime is accompanied by a sharp drop of the tangential forces on the wall. Regime III. For larger shear rates, the wrinkles align strongly along the shear direction, with a set of dislocation defects which assemble in pairs. The tangential forces are then controlled by the number of dislocations, and by the number of wrinkles between the two dislocations within each dislocation pairs. In this dislocation-dominated regime, the tangential forces in the transverse direction most often exceed those in the shear direction. Regime IV. For even larger shear, the membrane organizes into a perfect array of parallel stripes with no defects. The wavelength of the wrinkles is still identical to the wavelength in the absence of shear. In this final regime, the tangential forces due to the membrane vanish. These behaviors give rise to a non-linear rheological behavior of lubricated contacts containing membranes.
description: Soft Matter (2021)
On generic frequency decomposition. Part 1: vectorial decomposition
Creators: name: Vergara, Sossio
Publisher: name: arXiv
Year: 2008
Subjects: subject: Numerical Analysis (math.NA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: The famous Fourier theorem states that, under some restrictions, any periodic function (or real world signal) can be obtained as a sum of sinusoids, and hence, a technique exists for decomposing a signal into its sinusoidal components. From this theory an entire branch of research has flourished: from the Short-Time or Windowed Fourier Transform to the Wavelets, the Frames, and lately the Generic Frequency Analysis. The aim of this paper is to take the Frequency Analysis a step further. It will be shown that keeping the same reconstruction algorithm as the Fourier Theorem but changing to a new computing method for the analysis phase allows the generalization of the Fourier Theorem to a large class of nonorthogonal bases. New methods and algorithms can be employed in function decomposition on such generic bases. It will be shown that these algorithms are a generalization of the Fourier analysis, i.e. they are reduced to the familiar Fourier tools when using orthogonal bases. The differences between this tool and the wavelets and frames theories will be discussed. Examples of analysis and reconstruction of functions using the given algorithms and nonorthogonal bases will be given. In this first part the focus will be on vectorial decomposition, while the second part will be on phased decomposition. The phased decomposition thanks to a single function basis has many interesting consequences and applications.
description: 15 pages, no figures