cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Metabarcoding meiofauna biodiversity assessment in four beaches of Northern Colombia: Effects of sampling protocols and primer choice
Creators: name: Castro, Lyda R
name: Meyer, Rachel
name: Shirazi, Sabrina
name: Shapiro, Beth
name: Cutler, Samuel
name: Lagos, Ana
name: Quiroga, Sigmer
Publisher: name: Zenodo
Year: 2021

description: COI and 18S reference databases, taxonomic assignments of Amplicon Sequence Variants, as well as all scripts used in the project -Metabarcoding meiofauna biodiversity assessment in four beaches of Northern Colombia: Effects of sampling protocols and primer choice- ABSTRACT Environmental DNA (eDNA) metabarcoding can enhance understanding of global biodiversity by making it possible to study taxonomic groups that are difficult to sample. However, experimental choices made when generating eDNA data can impact biodiversity surveys, and must be carefully considered during study design. Here, we explored the impact of DNA extraction protocol and metabarcode choice on recovery of meiofauna DNA from sand. We extracted DNA from untreated sand and from sand treated with either Ludox or MgCl2, and amplified DNA using the 18S and CO1 metabarcodes. We found differences in species composition and richness both between metabarcodes and among sampling strategies, confirming the sensitivity of the experiments to both parameters. Combining data from multiple barcodes and from multiple extraction protocols increased recovered meiofaunal taxonomic diversity. Future metabarcoding studies and meta-analyses should consider the effects of sampling protocols on biodiversity. Our results also highlight the need to continue to improve existing reference databases of morphological and molecular characterization of meiofauna, in particular of the tropics, which are poorly represented in existing databases.
Unitary Approximate Message Passing for Sparse Bayesian Learning
Creators: name: Luo, Man
name: Guo, Qinghua
name: Jin, Ming
name: Eldar, Yonina C.
name: Defeng
name: Huang
name: Meng, Xiangming
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Sparse Bayesian learning (SBL) can be implemented with low complexity based on the approximate message passing (AMP) algorithm. However, it does not work well for a generic measurement matrix, which may cause AMP to diverge. Damped AMP has been used for SBL to alleviate the problem at the cost of reducing convergence speed. In this work, we propose a new SBL algorithm based on structured variational inference, leveraging AMP with a unitary transformation (UAMP). Both single measurement vector and multiple measurement vector problems are investigated. It is shown that, compared to state-of-the-art AMP-based SBL algorithms, the proposed UAMP-SBL is more robust and efficient, leading to remarkably better performance.
The Three Dimensional Structural Shape of the Gravitational Potential in the Local Group
Creators: name: Lee, Bomee
name: Lee, Jounghun
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Local Group is a small galaxy cluster with the membership of 62 nearby galaxies including the Milky Way and M31. Although the Local Group has yet to be virialized, it interacts with the surrounding matter as one gravitationally bound system. To understand the formation and evolution of the Local Group as well as its member galaxies, it is important to reconstruct the gravitational potential field from the surrounding matter distribution in the local cosmic web. By measuring the anisotropy in the spatial distribution of the Local Group galaxies, which is assumed to be induced by the local gravitational tidal field , we resolve the three dimensional structure of the gravitational potential in the vicinity of the Milky Way smoothed on the Local Group mass scale. Our results show that (i) the minor principal axis of the Local Group tidal field is in the equatorial direction of alpha_{p}=15^{h}00^{m} and delta_{p}=20^{d}; (ii) it has a prolate shape with axial ratio of 0.5 +/- 0.13; (iii) the global tides in the Local Group is quite strong, which may provide a partial explanation for the low abundance of dwarf galaxies in the Local Group.
description: accepted for publication in MNRAS, revised version, 3D potential structure in LG found, error analysis significantly improved, 8 pages, 5 figures
Clustered Superfluids in the One Dimensional Bose-Hubbard model with extended correlated hopping
Creators: name: Stasińska, Julia
name: Dutta, Omjyoti
name: Barbiero, Luca
name: Lewenstein, Maciej
name: Chhajlany, Ravindra W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Bosonic lattice systems with non-trivial interactions represent an intriguing platform to study exotic phases of matter. Here, we study the effects of extended correlated hopping processes in a system of bosons trapped in a lattice geometry. The interplay between single particle tunneling terms, correlated hopping processes and on-site repulsion is studied by means of a combination of exact diagonalization, strong coupling expansion and cluster mean field theory. We identify a rich ground state phase diagram where, apart the usual Mott and superfluid states, superfluid phases with interesting clustering properties occur.
description: 9 pages, 6 figures, significantly revised arXiv:1912.13359
On Inverse Scattering at a Fixed Energy for Potentials with a Regular Behaviour at Infinity
Creators: name: Weder, Ricardo
name: Yafaev, Dimitri
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81U40, 35P25, 35Q40, 35R30

description: We study the inverse scattering problem for electric potentials and magnetic fields in $\ere^d, d\geq 3$, that are asymptotic sums of homogeneous terms at infinity. The main result is that all these terms can be uniquely reconstructed from the singularities in the forward direction of the scattering amplitude at some positive energy.
description: This is a slightly edited version of the previous paper
ExHuME: A Monte Carlo Event Generator for Exclusive Diffraction
Creators: name: Monk, J.
name: Pilkington, A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have written the Exclusive Hadronic Monte Carlo Event (ExHuME) generator. ExHuME implements the perturbative QCD calculation of Khoze, Martin and Ryskin of the process pp-> p+X+p, where X is a centrally produced colour singlet system.
description: 11 pages, 3 figures
Vierte Round-Table-Conference "Hunger, Armut und Wettrüsten - zu einer neuen moralischen Ordnung innerhalb und zwischen den Nationen" in Moskau
Creators: name: Grohs, Gerhard
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 35 Nr. 4 (1986): Ökumenische Rundschau, Band 35, Heft 4
Two Photon Exchange Contributions to Elastic e + p --> e + p Process in a Nonlocal Field Formalism
Creators: name: Jain, Pankaj
name: Joglekar, Satish D.
name: Mitra, Subhadip
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We compute the two photon exchange contributions to elastic scattering of polarized electrons from target protons. We use a nonlocal field theory formalism for this calculation. The formalism maintains gauge invariance and provides a systematic procedure for making this calculation. The results depend on one unknown parameter \bar b. We compute the two photon exchange correction to the ratio of electric to magnetic form factors extracted using the polarization transfer experiments. The correction is found to be small if \bar b ~ 1. However for larger values of \bar b>3, the correction can be quite significant. The correction to the polarization transfer results goes in the right direction to explain their difference with the ratio measured by Rosenbluth separation method. We find that the difference between the two experimental results can be explained for a wide range of values of the parameter \bar b. We also find that the corrections due to two photon exchange depend on the photon longitudinal polarization epsilon. Hence we predict an epsilon dependence of the form factor ratio extracted using the polarization transfer technique. Finally we obtain a limit on \bar b by requiring that the non-linearity in epsilon dependence of the unpolarized reduced cross section is within experimental errors.
description: 10 pages 7 figures
Polarization in the inner region of Pulsar Wind Nebulae
Creators: name: Bucciantini, N.
name: Del Zanna, L.
name: amato, E.
name: Volpi, D.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present here the first effort to compute synthetic synchrotron polarization maps of Pulsar Wind Nebulae (PWNe). Our goal is to highlight how polarization can be used as an additional diagnostic tool for the flow structure in the inner regions of these nebulae. Recent numerical simulations suggest the presence of flow velocities ~0.5 c in the surroundings of the termination shock, where most of the high energy emission comes from. We construct polarization maps taking into account relativistic effects like Doppler boosting and position angle swing. The effect of different bulk velocities is clarified with the help of a toy-model consisting of a uniformly emitting torus. We also present a map based on recent numerical simulations of the entire nebula and compare it with presently available data. The comparison with upcoming high resolution observations could provide new insight into the inner structure of the nebula and put constraints on the geometrical properties of the magnetic field.
description: Accepted for publication on A&A, 6 pages, 2 figures
Text: Autobiography
Creators: name: Criollo, Dora
name: Dabkowski, Maksymilian
name: Aguinda, Shen
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: con

description: Her infancy, how they lived in Dureno and moved to Zábalo. In Zábalo, she learned to fish and hunt. Then they returned to Dureno, because she was sick, and then she went to Zábalo again. At the end, she had family problems and they decided to come to Sinangoé and live here.
torchdistill: A Modular, Configuration-Driven Framework for Knowledge Distillation
Creators: name: Matsubara, Yoshitomo
Publisher: name: arXiv
Year: 2020
Subjects: subject: Machine Learning (cs.LG)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: While knowledge distillation (transfer) has been attracting attentions from the research community, the recent development in the fields has heightened the need for reproducible studies and highly generalized frameworks to lower barriers to such high-quality, reproducible deep learning research. Several researchers voluntarily published frameworks used in their knowledge distillation studies to help other interested researchers reproduce their original work. Such frameworks, however, are usually neither well generalized nor maintained, thus researchers are still required to write a lot of code to refactor/build on the frameworks for introducing new methods, models, datasets and designing experiments. In this paper, we present our developed open-source framework built on PyTorch and dedicated for knowledge distillation studies. The framework is designed to enable users to design experiments by declarative PyYAML configuration files, and helps researchers complete the recently proposed ML Code Completeness Checklist. Using the developed framework, we demonstrate its various efficient training strategies, and implement a variety of knowledge distillation methods. We also reproduce some of their original experimental results on the ImageNet and COCO datasets presented at major machine learning conferences such as ICLR, NeurIPS, CVPR and ECCV, including recent state-of-the-art methods. All the source code, configurations, log files and trained model weights are publicly available at https://github.com/yoshitomo-matsubara/torchdistill .
description: Accepted to the 3rd Workshop on Reproducible Research in Pattern Recognition at ICPR 2020
Formation of Polymorphic Cluster Phases for Purely Repulsive Soft Spheres
Creators: name: Mladek, Bianca M.
name: Gottwald, Dieter
name: Kahl, Gerhard
name: Neumann, Martin
name: Likos, Christos N.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We present results from density functional theory and computer simulations that unambiguously predict the occurrence of first-order freezing transitions for a large class of ultrasoft model systems into cluster crystals. The clusters consist of fully overlapping particles and arise without the existence of attractive forces. The number of particles participating in a cluster scales linearly with density, therefore the crystals feature density-independent lattice constants. Clustering is accompanied by polymorphic bcc-fcc transitions, with fcc being the stable phase at high densities.
description: 4 pages, 5 figures, submitted to Phys. Rev. Lett
Negotiating feminism in political fields : feminist organisations in Singapore and Hong Kong
Creators: name: Lim, Adelyn Li-Ping
Publisher: name: The Australian National University
Year: 2009
Subjects: subject: HQ1750.67 .L56 2009
subject: Feminism Singapore
subject: Feminism Hong Kong (China)
subject: Women Political activity Singapore
subject: Women Political activity Hong Kong (China)

description: The particularity of feminist organisational emergence and development in a given locality reflects the distinctive historical development and socio-political context in which feminist politics unfold, as well as the country-specific priorities and preferences of activists. This dissertation is a comparative analysis of feminist organisations in contemporary Singapore and Hong Kong. I examine the circumstances under which feminist organisational forms, rhetoric, and strategies come to be selected by activists in order to understand concretely the making of organisations within the same movement in two different socio-political environments. This dissertation reconceptualises the socio-political environment within which an organisation operates by drawing on Raka Ray's concept of political fields. A political field is a structured and socially constructed environment within which organisations are embedded and to which organisations constantly respond. In other words, organisations are not autonomous agents, but rather they inherit a field involving various social actors and their accompanying social relations. State leaders and bureaucracies, political parties, and social movement organisations are all social actors who connect to one another in various ways, and differ in their access to power. I discuss how political fields in Singapore and Hong Kong structure the organisational forms, rhetoric, and strategies of feminist organisations, as well as how activists understand and work around the political fields that their organisations inhabit by allying with some groups and not with others, by magnifying rhetoric around specific issues and downplaying others, and by advocating certain strategies and bypassing others. To broaden the concept of political fields, I also examine feminist agency as a collective process, rather than as an individual's agenda. I illustrate feminist agency as the ability to coordinate one's actions with others and against others, to monitor the simultaneous effects of one's own and others' activities, and to generate and sustain collective action in a political field. At the same time, I consider the collectively-produced differences in influence due to the power exercised by individual activists who occupy different positions in feminist organisations and social movement coalitions. In this way, I perceive feminist agency and political fields as simultaneously evolving and dialectically interacting phenomena. Hence, this dissertation builds on the foundations of a structural analysis, but also affords a meaningful analytical space for identifying the ways in which activists influence or alter the conditions for collective action, even as their own agencies are reformed through their participation in feminist activism.
Quantum Monte Carlo Simulation of Generalized Kitaev Models
Creators: name: Sato, Toshihiro
name: Assaad, Fakher F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Frustrated spin systems generically suffer from the negative sign problem inherent to Monte Carlo methods. Since the severity of this problem is formulation dependent, optimization strategies can be put forward. We introduce a phase pinning approach in the realm of the auxiliary field quantum Monte Carlo algorithm. If we can find an anti-unitary operator that commutes with the one body Hamiltonian coupled to the auxiliary field, then the phase of the action is pinned to $0$ and $π$. For generalized Kitaev models, we can successfully apply this strategy and observe a remarkable improvement of the average sign. We use this method to study thermodynamical and dynamical properties of the Kitaev-Heisenberg model down to temperatures corresponding to half of the exchange coupling constant. Our dynamical data reveals finite temperature properties of ordered and spin-liquid phases inherent to this model.
description: 5 pages, 5 figures, supplemental material
On the Hall algebra of an elliptic curve, I
Creators: name: Burban, Igor
name: Schiffmann, Olivier
Publisher: name: arXiv
Year: 2005
Subjects: subject: Algebraic Geometry (math.AG)
subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics
subject: 17B37, 18E30, 05E05

description: In this article we describe the Hall algebra H_X of an elliptic curve X defined over a finite field and show that the group SL(2,Z) of exact auto-equivalences of the derived category D^b(Coh(X)) acts on the Drinfeld double DH_X of H_X by algebra automorphisms. Next, we study a certain natural subalgebra U_X of DH_X for which we give a presentation by generators and relations. This algebra turns out to be a flat two-parameter deformation of the ring of diagonal invariants C[x_1^{\pm 1}, ..., y_1^{\pm 1},...]^{S_{\infty}}, i.e. the ring of symmetric Laurent polynomials in two sets of countably many variables under the simultaneous symmetric group action.
description: 47 pages, Latex; several changes in the presentation
Spatial structure of unstable normal modes in a glass-forming liquid
Creators: name: Shimada, Masanari
name: Coslovich, Daniele
name: Mizuno, Hideyuki
name: Ikeda, Atsushi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The phenomenology of glass-forming liquids is often described in terms of their underlying, high-dimensional potential energy surface. In particular, the statistics of stationary points sampled as a function of temperature provides useful insight into the thermodynamics and dynamics of the system. To make contact with the real space physics, however, analysis of the spatial structure of the normal modes is required. In this work, we numerically study the potential energy surface of a glass-forming ternary mixture. Starting from liquid configurations equilibrated over a broad range of temperatures using a swap Monte Carlo method, we locate the nearby stationary points and investigate the spatial architecture and the energetics of the associated unstable modes. Through this spatially-resolved analysis, originally developed to study local minima, we corroborate recent evidence that the nature of the unstable modes changes from delocalized to localized around the mode-coupling temperature. We find that the displacement amplitudes of the delocalized modes have a slowly decaying far field, whereas the localized modes consist of a core with large displacements and a rapidly decaying far field. The fractal dimension of unstable modes around the mobility edge is equal to 1, consistent with the scaling of the participation ratio. Finally, we find that around and below the mode-coupling temperature the unstable modes are localized around structural defects, characterized by a disordered local structure markedly different from the liquid's locally favored structure. These defects are similar to those associated to quasi-localized vibrations in local minima and are good candidates to predict the emergence of localized excitations at low temperature.
description: 16 pages, 15 figures, submission to SciPost
A Stenomesius rufescens (Retzius, 1783) a Choreutis nemorana (Hübner, 1799) parazitája Magyarországon (Hymenoptera, Lepidoptera)
Creators: name: Fazekas, Imre
Publisher: name: Pannon Intézet
Year: 2019

description: microlepidoptera.hu. ISSN 2062-6738. Tom. 15. (2019)
Phase Diagram of Cold Polarized Fermi Gas in Two Dimensions
Creators: name: He, Lianyi
name: Zhuang, Pengfei
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Other Condensed Matter (cond-mat.other)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The superfluid phase diagrams of a two-dimensional cold polarized Fermi gas in the BCS-BEC crossover are systematically and analytically investigated. In the BCS-Leggett mean field theory, the transition from unpolarized superfluid phase to normal phase is always of first order. For a homogeneous system, the two critical Zeeman fields and the critical population imbalance are analytically determined in the whole coupling parameter region, and the superfluid-normal mixed phase is shown to be the ground state between the two critical fields. The density profile in the presence of a harmonic trap calculated in the local density approximation exhibits a shell structure, a superfluid core at the center and a normal shell outside. For weak interaction, the normal shell contains a partially polarized cloud with constant density difference surrounded by a fully polarized state. For strong interaction, the normal shell is totally in fully polarized state with a density profile depending only on the global population imbalance. The di-fermion bound states can survive in the whole highly imbalanced normal phase.
description: V3: extended version according to referee's comment. 12 pages, 6 figures. Analytical results of density profile in trapped system are reported; V4: Version accepted by Physical Review A
Proof that the Hydrogen-antihydrogen Molecule is Unstable
Creators: name: Gridnev, D. K.
name: Greiner, C.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In the framework of nonrelativistic quantum mechanics we derive a necessary condition for four Coulomb charges $(m_{1}^+, m_{2}^-, m_{3}^+, m_{4}^-)$, where all masses are assumed finite, to form the stable system. The obtained stability condition is physical and is expressed through the required minimal ratio of Jacobi masses. In particular this provides the rigorous proof that the hydrogen-antihydrogen molecule is unstable. This is the first result of this sort for four particles.
description: Submitted to Phys.Rev.Lett
IIIF collections as Research Data – an Integrated Approach by the Zentralbibliothek Zürich
Creators: name: Gamer, Elisabeth-Christine
name: Kreyenbühl, Elias
Publisher: name: Zenodo
Year: 2022

description: The IIIF (International Image Interoperability Framework) standard allows us to gather digital
 collections of manuscripts and artworks in libraries, archives and museums from around the
 world, create scholarly annotations or highlight evidence by creating contextualized and
 interactive displays. So far, hundreds of libraries, archives and museums have implemented
 IIIF protocols and thus over 1 bn images of cultural heritage are freely and interoperably
 available and reusable.
 Unfortunately, working with IIIF manifests has not been straightforward up until now. There is
 a plethora of open source tools allowing scholars to pursue specific research activities. These
 tools often do not integrate well, however. In many cases, considerable IT skills are required
 to get started. This is where our ambition comes into play. We intend to lower the hurdle: to
 integrate existing tools into an intrinsically open and seamless research environment.
 We identified one central element that was missing: a storage component for Mirador Viewer
 - the most widely used digital media viewer for IIIF resources. Our first idea was to create a
 new data store at the Zentralbibliothek Zürich. We then realized that storing these resources
 locally was actually not an option, since IIIF is based on linked data. We decided to integrate
 a storage function with GitHub. On GitHub saved collections can be addressed via the
 internet and thus be shared with others or reused in any other IIIF compatible tool.
 Why should working with IIIF be considered as a practice of Open Science? In a way, the IIIF
 protocol makes open content even more open. Every single page of a manuscript can be
 addressed and reused in a simple and direct way. Thanks to a standardized API, content and
 software functions for any archive providing IIIF access are delivered in the same way. There
 are reasons to hope for a positive enforcement of Open Science by facilitating the use of
 open data as well as open tools to create open and reusable research data.
 As part of our poster we would like to present our software development, which is still in
 progress, and address at the same time the question of scholarly best practice. Drawing on
 examples of current research using IIIF resources and bearing in mind the research
 environment we are working on, we would like to offer some ideas of how such best practice
 should, in our opinion, look like in the future.
Single Electron Spectra in RPWELL-based detectors
Creators: name: Bhattacharya, Purba
name: Tesi, Andrea
name: Shaked-Renous, Dan
name: Moleri, Luca
name: Breskin, Amos
name: Bressler, Shikma
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: Single-electron avalanche distributions in gaseous multipliers affect their efficient detection and that of single UV-photons. In this work, we investigated the shape of single-photo-electron spectra in single- and double-stage Resistive Plate WELL (RPWELL) detector configurations, operated in $\mathrm{Ne/CH_{4}}$ and $\mathrm{Ar/CH_{4}}$. Discharge-free operation was reached over a broad dynamic range, with charge gains of \numrange[range-phrase = -]{e4}{e6}. Compared to the usual exponential ones, the observed Polya-like charge spectra pave the way towards higher single-electrons detection efficiencies. The latter were evaluated here, using experimental data combined with numerical simulations. The effects of the gas mixtures, electric field configuration and detector geometry on the Polya spectra and their related "$θ$" parameter are presented.
Chern-Simons and Winding Number in a Tachyonic Electroweak Transition
Creators: name: van der Meulen, Meindert
name: Sexty, Denes
name: Smit, Jan
name: Tranberg, Anders
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate the development of winding number and Chern-Simons number in a tachyonic transition in the SU(2) Higgs model, motivated by the scenario of cold electroweak baryogenesis. We find that localized configurations with approximately half-integer winding number, dubbed half-knots, play an important role in this process. When the Chern-Simons number adjusts locally to the winding number, the half-knots can stabilize and acquire half-integer Chern-Simons number as well. We present two examples from numerical simulations: one half-knot that stabilizes early and one that gives rise to a late sphaleron transition. We also study the winding number distribution after the transition and present new results on the development of the Chern-Simons susceptibility.
description: 36 pages, 38 figures
Does Inflation Provide Natural Initial Conditions for the Universe?
Creators: name: Carroll, Sean M.
name: Chen, Jennifer
Publisher: name: arXiv
Year: 2005
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: If our universe underwent inflation, its entropy during the inflationary phase was substantially lower than it is today. Because a low-entropy state is less likely to be chosen randomly than a high-entropy one, inflation is unlikely to arise through randomly-chosen initial conditions. To resolve this puzzle, we examine the notion of a natural state for the universe, and argue that it is a nearly-empty spacetime. If empty space has a small vacuum energy, however, inflation can begin spontaneously in this background. This scenario explains why a universe like ours is likely to have begun via a period of inflation, and also provides an origin for the cosmological arrow of time.
description: Submitted to Gravity Research Foundation Essay Competition; based on hep-th/0410270
The application of source-aided turbo decoding to IS-95 CDMA systems
Creators: name: Lo, Norman C.
Publisher: name: University of British Columbia
Year: 2009

description: We develop source-aided channel decoding techniques and apply them for image transmission using the channel forward error correction codes of the IS-95 Code Division Multiple Access (CDMA) standard. The source is modeled as a first order Markov model with states that correspond directly to the source coder codewords. The model is used to form a MAP version of the Viterbi algorithm for decoding convolutional codes. For the case of a two-state Markov model, the generalization of the Viterbi algorithm involves only a modification of the branch metric; while for N-state Markov models, a technique called trellis merging is also implemented to keep the decoding complexity low. An iterative model recovery technique is developed which allows the receiver to recover the source model without any a priori information. Simulating these techniques for the case of the two-bit DPCM encoded Lenna image, we find a coding gain over an Additive White Gaussian Noise (AWGN) channel of approximately 1.1 dB at a BER of 10⁻⁴ for both the forward and reverse link of the IS-95 standard. We go on to develop a turbo version of the IS-95 reverse link decoder. This involves implementing a "soft-in/soft-out" version of the component decoders, and introducing an iterative decoding procedure. The coding gain found by this turbo enhancement is 0.75 dB at a BER of 10⁻³. A Markov model-aided version of the turbo reverse link decoder is then developed by migrating the techniques used in the Viterbi algorithm to the soft-in/soft-out decoders. The ensuing Markov model aided turbo decoder has a two-level iterative structure due to the fact that there are source model recovering iterations and turbo iterations. Three different architectures for the two-level iterative structure are proposed and compared. Although all three methods provide similar coding gain over an AWGN channel, they differ in speed of convergence and implementation complexity. For the case of transmission of the two-bit DPCM encoded Lenna image, the coding gain over an AWGN channel at the final iteration is 1.6 dB at a BER of 10⁻².
Cavity-modulated ionization potentials and electron affinities from quantum electrodynamics coupled-cluster theory
Creators: name: DePrince, A. Eugene
Publisher: name: arXiv
Year: 2020
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Quantum electrodynamics coupled-cluster (QED-CC) theory is used to model vacuum-field-induced changes to ground-state properties of a series of sodium halide compounds (NaX, X = F, Cl, Br, I) strongly coupled to an optical cavity. Ionization potentials (IPs) and electron affinities (EAs) are presented, and it is demonstrated that EAs are easily modulated by cavity interactions, while IPs for these compounds are far less sensitive to the presence of the cavity. EAs predicted by QED-CC can be reduced by as much 0.22 eV (or ~50%) when considering experimentally-accessible coupling parameters.
Improving the Lagrangian perturbative solution for cosmic fluid: Applying Shanks transformation
Creators: name: Tatekawa, Takayuki
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the behavior of Lagrangian perturbative solutions. For a spherical void model, the higher order the Lagrangian perturbation we consider, the worse the approximation becomes in late-time evolution. In particular, if we stop to improve until an even order is reached, the perturbative solution describes the contraction of the void. To solve this problem, we consider improving the perturbative solution using Shanks transformation, which accelerates the convergence of the sequence. After the transformation, we find that the accuracy of higher-order perturbation is recovered and the perturbative solution is refined well. Then we show that this improvement method can apply for a $Λ$CDM model and improved the power spectrum of the density field.
description: 17 pages, 7 figures; accepted for publication in Phys.Rev.D; v2: Evolution of power spectrum in LCDM model is added; v3: References are corrected
Text: Yaje and yuku
Creators: name: Quenamá Lucitante, Abrahan Geovany
name: Dabkowski, Maksymilian
name: Quenamá, Leidy
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: con

description: Before, the ancestors drank yaje and yuku, and they were strong. The youth these days do not drink yaje or yuku because they say that it is good for nothing. But a select few in Sinangoé drink yaje and they know how to do it because their ancestors used to drink yaje and they were the ones who encouraged the youth.
Estimating Soil Organic Carbon Sequestration in Rice Paddies as Influenced by Climate Change under Scenario A2 and B2 of an i-EPIC model of Thailand
Creators: name: Noppol Arunrat
name: NathsudaPumijumnong
name: Attaya Phinchongsakuldit
Publisher: name: Thai Society of Higher Education Institutes on Environment
Year: 2014
Subjects: soil organic carbon,climate change,i-EPIC model,rice paddy,Thailand

description: 1, 7, EnvironmentAsia
Simulating the dynamics of braiding of Majorana zero modes using an IBM quantum computer
Creators: name: Stenger, John P. T.
name: Bronn, Nicholas T.
name: Egger, Daniel J.
name: Pekker, David
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We simulate the dynamics of braiding Majorana zero modes on an IBM Quantum computer. We find the native quantum gates introduce too much noise to observe braiding. Instead, we use Qiskit Pulse to develop scaled two-qubit quantum gates that better match the unitary time evolution operator and enable us to observe braiding. This work demonstrates that quantum computers can be used for simulation, and highlights the use of pulse-level control for programming quantum computers and constitutes the first experimental evidence of braiding via dynamical Hamiltonian evolution.
A Cacoecimorpha pronubana (Hübner, [1796–99]) új tápnövénye Magyarországon a Hedera helix L.
Creators: name: Fazekas, Imre
Publisher: name: Pannon Intézet
Year: 2019

description: microlepidoptera.hu. ISSN 2062-6738. Tom. 15. (2019)
Decolorization of Methyl Red by Staphylococcus saprophyticus strain AUCASVE3 Isolated from Textile Effluent
Creators: name: Azizul Hakim
name: Sirajul Hoque
name: Shah Mohammad Ullah
Publisher: name: Thai Society of Higher Education Institutes on Environment
Year: 2014
Subjects: decolorization,methyl red,16S rRNA genes,Staphylococcus saprophyticus strain AUCASVE3

description: 1, 7, EnvironmentAsia
Evaluation of Technological Content of Wastewater Treatment of Palm Oil Mill in Lampung Province, Indonesia
Creators: name: Sarono
name: E. Gumbira-Sa'id
name: Ono Suparno
name: Suprihatin
name: Udin Hasanudin
Publisher: name: Thai Society of Higher Education Institutes on Environment
Year: 2014
Subjects: THIO,technological content,methane capture,electrical energy

description: 1, 7, EnvironmentAsia
Accurate and Lightweight Image Super-Resolution with Model-Guided Deep Unfolding Network
Creators: name: Ning, Qian
name: Dong, Weisheng
name: Shi, Guangming
name: Li, Leida
name: Li, Xin
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Deep neural networks (DNNs) based methods have achieved great success in single image super-resolution (SISR). However, existing state-of-the-art SISR techniques are designed like black boxes lacking transparency and interpretability. Moreover, the improvement in visual quality is often at the price of increased model complexity due to black-box design. In this paper, we present and advocate an explainable approach toward SISR named model-guided deep unfolding network (MoG-DUN). Targeting at breaking the coherence barrier, we opt to work with a well-established image prior named nonlocal auto-regressive model and use it to guide our DNN design. By integrating deep denoising and nonlocal regularization as trainable modules within a deep learning framework, we can unfold the iterative process of model-based SISR into a multi-stage concatenation of building blocks with three interconnected modules (denoising, nonlocal-AR, and reconstruction). The design of all three modules leverages the latest advances including dense/skip connections as well as fast nonlocal implementation. In addition to explainability, MoG-DUN is accurate (producing fewer aliasing artifacts), computationally efficient (with reduced model parameters), and versatile (capable of handling multiple degradations). The superiority of the proposed MoG-DUN method to existing state-of-the-art image SR methods including RCAN, SRMDNF, and SRFBN is substantiated by extensive experiments on several popular datasets and various degradation scenarios.
description: Image Super-resolution, in IEEE Journal of Selected Topics in Signal Processing
On the Weakening of Chromospheric Magnetic Field in Active Regions
Creators: name: Nagaraju, K.
name: Sankarasubramanian, K.
name: Rangarajan, K. E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Simultaneous measurement of line-of-sight (LOS) magnetic and velocity fields at the photosphere and chromosphere are presented. Fe I line at $\lambda6569$ and $H_α$ at $\lambda6563$ are used respectively for deriving the physical parameters at photospheric and chromospheric heights. The LOS magnetic field obtained through the center-of-gravity method show a linear relation between photospheric and chromospheric field for field strengths less than 700 G. But in strong field regions, the LOS magnetic field values derived from $H_α$ are much weaker than what one gets from the linear relationship and also from those expected from the extrapolation of the photospheric magnetic field. We discuss in detail the properties of magnetic field observed in $H_α$ from the point of view of observed velocity gradients. The bisector analysis of $H_α$ Stokes $I$ profiles show larger velocity gradients in those places where strong photospheric magnetic fields are observed. These observations may support the view that the stronger fields diverge faster with height compared to weaker fields.
description: accepted for publication in ApJ
Seasonal Variations and Yearly Trend Evaluations of Sedimentation Loads: A Case Study at Chalok River, Terengganu, Malaysia
Creators: name: Shamsuddin, Aida Soraya
name: Aris, Ahmad Zaharin
name: Fazrul Razman Sulaiman
name: Ghazali, Farhana Mohamed
Publisher: name: Thai Society of Higher Education Institutes on Environment
Year: 2014
Subjects: rainfall,sedimentation loads,spearman correlation,Mann-Kendall trend test,multiple linear regressions

description: 1, 7, EnvironmentAsia
Noncoplanar multiple-$Q$ spin textures by itinerant frustration: Effects of single-ion anisotropy and bond-dependent anisotropy
Creators: name: Hayami, Satoru
name: Motome, Yukitoshi
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We theoretically investigate multiple-$Q$ spin textures, which are composed of superpositions of spin density waves with different wave numbers, for an effective spin model of centrosymmetric itinerant magnets. Our focus is on the interplay between biquadratic interactions arising from the spin-charge coupling and magnetic anisotropy caused by the spin-orbit coupling. Taking into account two types of the magnetic anisotropy, single-ion anisotropy and bond-dependent anisotropy, we elucidate magnetic phase diagrams for an archetypal triangular-lattice system in the absence and presence of an external magnetic field. In the case of the single-ion anisotropy, we find a plethora of multiple-$Q$ instabilities depending on the strength and the sign of the anisotropy (easy plane or easy axis), including a skyrmion crystal with topological number of two. In an external magnetic field, we find that a skyrmion crystal with topological number of one is stabilized by the in-plane (out-of-plane) magnetic field under the easy-plane (easy-axis) anisotropy. We also examine the stability of the field-induced skyrmion crystal by rotating the field direction. As a biproduct, we show that a triple-$Q$ state with nonzero chirality appears in the presence of the biquadratic interaction and the easy-axis anisotropy. Meanwhile, we find that the bond-dependent anisotropy also stabilizes both types of skyrmion crystals. We show that, however, for the skyrmion crystal with topological number of one, Bloch- and Néel-type skyrmion crystals are selectively realized depending on the sign of the bond-dependent anisotropy. Moreover, we find yet another multiple-$Q$ states, including two types of meron crystals with the skyrmion numbers of one and two. The systematic investigation will provide a reference to complex magnetic textures in centrosymmetric magnetic metals.
description: 38 pages, 51 figures
Advanced Oxidation of the Endosulfan and Profenofos in Aqueous Solution Using UV/H2O2 Process
Creators: name: Amin, Mohammad Mehdi
name: Jaberian, Behzad
name: Bina, Bijan
name: Sadani, Mohsen
name: Hadian, Reza
name: Gholamreza Bonyadinejad
name: Moazzam, Mohammad Mehdi Ahmad
Publisher: name: Thai Society of Higher Education Institutes on Environment
Year: 2014
Subjects: endosulfan,profenofos,UV irradiation,UV/H2O2

description: 1, 7, EnvironmentAsia
Propagators weakly associated to a family of Hamiltonians and the adiabatic theorem for the Landau Hamiltonian with a time-dependent Aharonov-Bohm flux
Creators: name: Asch, J.
name: Hradecky, I.
name: Stovicek, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences
subject: 35Q40, 35J10, 81V45

description: We study the dynamics of a quantum particle moving in a plane under the influence of a constant magnetic field and driven by a slowly time-dependent singular flux tube through a puncture. The known adiabatic results do not cover these models as the Hamiltonian has time dependent domain. We give a meaning to the propagator and prove an adiabatic theorem. To this end we introduce and develop the new notion of a propagator weakly associated to a time-dependent Hamiltonian.
description: Title and Abstract changed, will appear in Journal of Mathematical Physics
A Hausdorff Operator on Lebesgue Space With Commuting Perturbation Matrices Is a Non-Riesz Operator
Creators: name: Mirotin, A. R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 45P05, 47G10, 47B06

description: We consider a generalization of Hausdorff operators on Lebesgue spaces and under natural conditions prove that such an operator is not a Riesz operator provided it is non-zero. In particular, it cannot be represented as a sum of a quasinilpotent and compact operators.
description: arXiv admin note: text overlap with arXiv:2005.08003
Seniority conservation and seniority violation in the g_{9/2} shell
Creators: name: Escuderos, A.
name: Zamick, L.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The g_{9/2} shell of identical particles is the first one for which one can have seniority-mixing effects. We consider three interactions: a delta interaction that conserves seniority, a quadrupole-quadrupole (QQ) interaction that does not, and a third one consisting of two-body matrix elements taken from experiment (98Cd) that also leads to some seniority mixing. We deal with proton holes relative to a Z=50,N=50 core. One surprising result is that, for a four-particle system with total angular momentum I=4, there is one state with seniority v=4 that is an eigenstate of any two-body interaction--seniority conserving or not. The other two states are mixtures of v=2 and v=4 for the seniority-mixing interactions. The same thing holds true for I=6. Another point of interest is that the splittings E(I_{max})-E(I_{min}) are the same for three and five particles with a seniority conserving interaction (a well known result), but are equal and opposite for a QQ interaction. We also fit the spectra with a combination of the delta and QQ interactions. The Z=40,N=40 core plus g_{9/2} neutrons (Zr isotopes) is also considered, although it is recognized that the core is deformed.
description: 19 pages, 9 figures; RevTeX4. We have corrected the SDI values in Table1 and Fig.1; in Sect.VII we have included an explanation of Fig.3 through triaxiality; we have added comments of Figs.10-12 in Sect.IX; we have removed Figs.7-9