cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Impact of gapped spin-orbit excitons on low energy pseudospin exchange interactions
Creators: name: Voleti, Sreekar
name: Wandler, F David
name: Paramekanti, Arun
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The quest for exotic quantum magnetic ground states, including the Kitaev spin liquid and quantum spin-ices, has led to the discovery of several quantum materials where low energy pseudospin-$1/2$ doublets arise from the splitting of spin-orbit entangled multiplets with higher degeneracy. Such systems include $d$-orbital and $f$-orbital Mott insulators. When the gap between the low energy pseudospin-$1/2$ levels and the excited levels of the multiplet or `excitons' is not large, the effective low-energy exchange interactions between the low energy pseudospin-$1/2$ moments can acquire significant corrections from coupling to the excitons. We extract these corrections using higher order perturbation theory as well as an exact Schrieffer-Wolff transformation. Such corrections can impact the exchange matrix for the low energy pseudospin-$1/2$ levels by renormalizing the strength and the sign of Heisenberg exchange or Ising anisotropies, and potentially even inducing bond-anisotropic couplings such as Kitaev-$Γ$ exchange interactions. We discuss recent experiments on various cobaltate and osmate materials which hint at the ubiquity and importance of this physics.
description: 15 pages, 6 figures
Observation of the $4f^{14}6s^{2}~^1S_0- 4f^{13}5d6s^{2}(J=2)$ clock transition at 431 nm in $^{171}$Yb
Creators: name: Kawasaki, Akio
name: Kobayashi, Takumi
name: Nishiyama, Akiko
name: Tanabe, Takehiko
name: Yasuda, Masami
Publisher: name: arXiv
Year: 2023
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report on the observation of the $4f^{14}6s^{2}~^1S_0- 4f^{13}5d6s^{2}(J=2)$ transition at 431 nm in $^{171}$Yb by depleting atoms in a magneto-optical trap formed by the $6s^{2}~^1S_0-6s6p~^3P_1$ intercombination transition. The absolute frequency of the transition to the $F=3/2$ state is determined to be $695~171~054~858.1(8.2)$~kHz against physical realization of Coordinated Universal Time maintained by the National Metrology Institute of Japan with a frequency comb. The $g$ factor of the transition to the $F=3/2$ state and the A hyperfine constant are measured to be $g_J=1.54(13)$ and 1123.354(13)~MHz, respectively. More precise spectroscopy of this transition can lead to searches for time variation of the fine structure constant and searches for new physics with isotope shift measurements.
description: 5 pages, 4 figures
Quantics Tensor Cross Interpolation for High-Resolution, Parsimonious Representations of Multivariate Functions in Physics and Beyond
Creators: name: Ritter, Marc K.
name: Fernández, Yuriel Núñez
name: Wallerberger, Markus
name: von Delft, Jan
name: Shinaoka, Hiroshi
name: Waintal, Xavier
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Multivariate functions of continuous variables arise in countless branches of science. Numerical computations with such functions typically involve a compromise between two contrary desiderata: accurate resolution of the functional dependence, versus parsimonious memory usage. Recently, two promising strategies have emerged for satisfying both requirements: (i) The quantics representation, which expresses functions as multi-index tensors, with each index representing one bit of a binary encoding of one of the variables; and (ii) tensor cross interpolation (TCI), which, if applicable, yields parsimonious interpolations for multi-index tensors. Here, we present a strategy, quantics TCI (QTCI), which combines the advantages of both schemes. We illustrate its potential with an application from condensed matter physics: the computation of Brillouin zone integrals.
description: 6 pages, 3 figures; added 2 pages of supplementary material
Synthesis of indolo[4,3-bc]phenanthridine-6,11(2H,12H)-diones using the schiff base–homophthalic anhydride cyclization reaction
Creators: name: Elsayed, Mohamed S. A.
name: Zeller, Matthias
name: Cushman, Mark
Publisher: name: Taylor & Francis
Year: 2016
Subjects: subject: Biochemistry
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Cancer
subject: 110309 Infectious Diseases
subject: FOS: Health sciences
subject: Computational Biology

description: A novel indolophenanthridine ring system has been synthesized via the Schiff base–homophthalic anhydride cyclization followed by thionyl chloride–mediated dehydrogenation and intramolecular Friedel–Crafts acylation. This adds to the array of heterocyclic systems that are available through the cycloaddition reaction of imines with cyclic dicarboxylic acid anhydrides. The cytotoxicities of the indolophenanthridines were investigated in human cancer cell cultures, and the results documented significant antitumor activity in a variety of human cancer cell lines. This provides a new heterocyclic scaffold for anticancer drug design.
Triphenylphosphine-supported synthesis of two-dimensional silver(I) complex with (1,3,4-thiadiazole-2,5-diyldithio)diacetic acid
Creators: name: Subri, Noor H. A.
name: Umie F. M. Haziz
name: Mohd. R. Razali
Publisher: name: Taylor & Francis
Year: 2016
Subjects: subject: Biophysics
subject: Biochemistry
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences

description: The reaction of dicarboxylate ligand, (1,3,4-thiadiazole-2,5-diyldithio)diacetic acid (H2tdza) with silver(I) acetate and triphenylphosphine (PPh3) facilitate the formation of complex [Ag2(tdza)(PPh3)2]n (1). The complex was characterized by elemental analysis, FT-IR spectroscopy, 1H-NMR, 13C-NMR and 31P-NMR spectroscopy, and single crystal X-ray diffraction. Structural analysis revealed that complex 1 has a 2D topologically promising architecture as a result from the formation of 26-membered cyclic ring. The tdza2− ligand in 1 displays unprecedented µ4-bridging mode which is also the first example for this ligand. The interdigitating arrangement and π-π stacking between 2D arrays stabilized the formation of complex 1.
A minimization problem with free boundary and its application to inverse scattering problems
Creators: name: Kow, Pu-Zhao
name: Salo, Mikko
name: Shahgholian, Henrik
Publisher: name: arXiv
Year: 2023
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35J05, 35J15, 35J20, 35R30, 35R35

description: We study a minimization problem with free boundary, resulting in hybrid quadrature domains for the Helmholtz equation, as well as some application to inverse scattering problem.
description: 50 pages
Effect of Coriolis force on the shear viscosity of quark matter: A nonrelativistic description
Creators: name: Aung, Cho Win
name: Dwibedi, Ashutosh
name: Dey, Jayanta
name: Ghosh, Sabyasachi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Nuclear Theory (nucl-th)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Shear viscosity becomes anisotropic in a rotating medium. It is discovered here that for rotating thermalized quantum systems such as those created in relativistic heavy-ion collisions, the coeffficient of shear viscosity breaks up into five independent components. Similar phenomena were also discovered for quark-gluon plasma in the presence of the magnetic field. Like the Lorentz force at a finite magnetic field, the Coriolis force also creates anisotropic viscosity at nonzero rotation. As a first approach, for simplicity, the calculations are done in the nonrelativistic prescription, with a future proposal to extend it toward a relativistic description. Introducing the Coriolis force term in relaxation time approximated Boltzmann transport equation, we have found different effective relaxation times along the parallel, perpendicular, and Hall directions in terms of actual relaxation time and rotating time period. Comparing the present formalism with the finite magnetic field picture, we have shown the equivalence of roles between the rotating and cyclotron time periods, where the rotating time period is inverse of twice the angular velocity.
description: 11 pages, 5 figures
СОВРЕМЕННЫЕ ТЕНДЕНЦИИ МЕДИАЦИИ В УЗБЕКИСТАНЕ
Creators: name: Максудова, Шахло
Publisher: name: Zenodo
Year: 2024

description: В статье рассматриваются современные тенденции и перспективы развития института медиации в Узбекистане. Анализируется правовая база, регулирующая деятельность медиаторов, а также ключевые изменения в законодательстве, направленные на расширение применения медиации в различных сферах. Особое внимание уделяется практическому применению медиации в гражданских, коммерческих, семейных и трудовых спорах, а также растущей роли онлайн-медиации в условиях цифровизации. В статье также выделяются основные вызовы, стоящие перед развитием медиации в стране, такие как необходимость повышения квалификации специалистов, расширение правовой грамотности населения и увеличение доступности услуги. Приводится обзор инициатив, направленных на укрепление медиации как инструмента альтернативного разрешения споров и снижения нагрузки на судебную систему Узбекистана.
Supplementary_Tables from Next-generation freshwater bioassessment: eDNA metabarcoding with a conserved metazoan primer reveals species-rich and reservoir-specific communities
Creators: name: Lim, Nicholas K. M.
name: Ywee Chieh Tay
name: Srivathsan, Amrita
name: Tan, Jonathan W. T.
name: Kwik, Jeffrey T. B.
name: Bilgenur Baloğlu
name: Meier, Rudolf
name: Yeo, Darren C. J.
Publisher: name: The Royal Society
Year: 2016
Subjects: subject: Environmental Science
subject: 60102 Bioinformatics
subject: FOS: Computer and information sciences
subject: 60301 Animal Systematics and Taxonomy
subject: FOS: Biological sciences
subject: 60310 Plant Systematics and Taxonomy

description: Freshwater habitats are of high conservation value and provide a wide range of ecosystem services. Effective management requires regular monitoring. However, conventional methods based on direct observation or specimen collection are so invasive, expensive and labour-intensive that frequent monitoring is uncommon. Here, we test whether the evaluation of environmental DNA (eDNA) from water based on a simple protocol can be used for assessing biodiversity. We use universal metazoan primers for characterizing water eDNA across horizontal and vertical spatial dimensions in two reservoirs with known species diversity for two key taxa. eDNA obtained directly from 42 samples × 15 ml water (total = 630 ml) per reservoir yielded DNA signatures for more than 500 metazoan species, of which 105 could be identified to species/genus based on DNA barcodes. We show that eDNA can be used to assign each water sample to its reservoir of origin, and that eDNA outperforms conventional survey methods in single-sample richness comparisons, while revealing evidence for hundreds of unknown species that are undetected by conventional bioassessment methods. eDNA also confirms the presence of a recently discovered invasive snail species and provides evidence for the survival of a rare native species of goby not sighted in that habitat since 2007. eDNA thus promises to be a useful addition to the bioassessment toolbox for freshwater systems.
Production of genuine multimode entanglement in circular waveguides with long-range interactions
Creators: name: Anuradha, T
name: Patra, Ayan
name: Gupta, Rivu
name: Rai, Amit
name: De, Aditi Sen
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Starting with a product initial state, squeezed (squeezed coherent) state in one of the modes, and vacuum in the rest, we report that a circular waveguide comprising modes coupled with varying coupling strength is capable of producing genuine multimode entanglement (GME), quantified via the generalized geometric measure (GGM). We demonstrate that for a fixed coupling and squeezing strength, the GME content of the resulting state increases as the range of couplings between the waveguides increases, although the GGM collapses and revives with the variation of coupling strength and time. The advantage of long-range coupling can be emphasized by measuring the area under the GGM curve, which clearly illustrates the growing trends of GME with the increasing range of couplings. Moreover, long-range couplings help in generating a higher GGM for a fixed coupling strength. We analytically determine the exact expression of GGM for systems involving an arbitrary number of modes, when all the modes interact with each other equally. The entire analysis is performed in the phase-space formalism. We manifest the constructive effect of disorder in the coupling parameter, which promises a steady production of GME, independent of the coupling strength.
description: v1: 13 pages, 6 figures v2: close to published version
On the impact of regularization in data-driven predictive control
Creators: name: Breschi, Valentina
name: Chiuso, Alessandro
name: Fabris, Marco
name: Formentin, Simone
Publisher: name: arXiv
Year: 2023
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Model predictive control (MPC) is a control strategy widely used in industrial applications. However, its implementation typically requires a mathematical model of the system being controlled, which can be a time-consuming and expensive task. Data-driven predictive control (DDPC) methods offer an alternative approach that does not require an explicit mathematical model, but instead optimize the control policy directly from data. In this paper, we study the impact of two different regularization penalties on the closed-loop performance of a recently introduced data-driven method called $γ$-DDPC. Moreover, we discuss the tuning of the related coefficients in different data and noise scenarios, to provide some guidelines for the end user.
description: 7 pages, 3 figures
Roman Coin Hoards from Cumbria.
Creators: name: Shotter, David C A
Publisher: name: Archaeology Data Service
Year: 2008

description: Transactions of the Cumberland & Westmorland Antiquarian & Archaeological Society, 79, 5-18
description: Catalogues and discusses the significance of thirty-three hoards and possible hoards. The small number compared with other counties is attributable to Cumbria's small acreage of ploughed land. About half the hoards contain indications of their terminal dates: four are Trajanic-Antonine, five fall in the 270s, and there is no indication of the uncertainties of the end of the Roman occupation.
Supplementary_Figures from Next-generation freshwater bioassessment: eDNA metabarcoding with a conserved metazoan primer reveals species-rich and reservoir-specific communities
Creators: name: Lim, Nicholas K. M.
name: Ywee Chieh Tay
name: Srivathsan, Amrita
name: Tan, Jonathan W. T.
name: Kwik, Jeffrey T. B.
name: Bilgenur Baloğlu
name: Meier, Rudolf
name: Yeo, Darren C. J.
Publisher: name: The Royal Society
Year: 2016
Subjects: subject: Environmental Science
subject: 60102 Bioinformatics
subject: FOS: Computer and information sciences
subject: 60301 Animal Systematics and Taxonomy
subject: FOS: Biological sciences
subject: 60310 Plant Systematics and Taxonomy

description: Freshwater habitats are of high conservation value and provide a wide range of ecosystem services. Effective management requires regular monitoring. However, conventional methods based on direct observation or specimen collection are so invasive, expensive and labour-intensive that frequent monitoring is uncommon. Here, we test whether the evaluation of environmental DNA (eDNA) from water based on a simple protocol can be used for assessing biodiversity. We use universal metazoan primers for characterizing water eDNA across horizontal and vertical spatial dimensions in two reservoirs with known species diversity for two key taxa. eDNA obtained directly from 42 samples × 15 ml water (total = 630 ml) per reservoir yielded DNA signatures for more than 500 metazoan species, of which 105 could be identified to species/genus based on DNA barcodes. We show that eDNA can be used to assign each water sample to its reservoir of origin, and that eDNA outperforms conventional survey methods in single-sample richness comparisons, while revealing evidence for hundreds of unknown species that are undetected by conventional bioassessment methods. eDNA also confirms the presence of a recently discovered invasive snail species and provides evidence for the survival of a rare native species of goby not sighted in that habitat since 2007. eDNA thus promises to be a useful addition to the bioassessment toolbox for freshwater systems.
Charge order induced Dirac pockets in the nonsymmorphic crystal TaTe$_4$
Creators: name: Zhang, Yichen
name: Zhou, Ruixiang
name: Wu, Hanlin
name: Oh, Ji Seop
name: Li, Sheng
name: Huang, Jianwei
name: Denlinger, Jonathan D.
name: Hashimoto, Makoto
name: Lu, Donghui
name: Mo, Sung-Kwan
name: Kelly, Kevin F.
name: McCandless, Gregory T.
name: Chan, Julia Y.
name: Birgeneau, Robert J.
name: Lv, Bing
name: Li, Gang
name: Yi, Ming
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The interplay between charge order (CO) and nontrivial band topology has spurred tremendous interest in understanding topological excitations beyond the single-particle description. In a quasi-one-dimensional nonsymmorphic crystal TaTe$_4$, the (2a$\times$2b$\times$3c) charge ordered ground state drives the system into a space group where the symmetry indicator features the emergence of Dirac fermions and unconventional double Dirac fermions. Using angle-resolved photoemission spectroscopy and first-principles calculations, we provide evidence of the CO induced Dirac fermion-related bands near the Fermi level. Furthermore, the band folding at the Fermi level is compatible with the new periodicity dictated by the CO, indicating that the electrons near the Fermi level follow the crystalline symmetries needed to host double Dirac fermions in this system.
description: 9 pages, 4 figures. The authorship of this paper has been amended to include new coauthors Dr. Gregory T. McCandless and Dr. Julia Y. Chan of Department of Chemistry and Biochemistry, Baylor University. Drs. McCandless and Chan were responsible for x-ray characterization of the sample used in this study. Erratum to be published on Phys. Rev. B
Verifying Quantum Phase Estimation (QPE) using Prove-It
Creators: name: Witzel, Wayne M.
name: Craft, Warren D.
name: Carr, Robert
name: Kapur, Deepak
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Logic in Computer Science (cs.LO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The general-purpose interactive theorem-proving assistant called Prove-It was used to verify the Quantum Phase Estimation (QPE) algorithm, specifically claims about its outcome probabilities. Prove-It is unique in its ability to express sophisticated mathematical statements, including statements about quantum circuits, integrated firmly within its formal theorem-proving framework. We demonstrate our ability to follow a textbook proof to produce a formally certified proof, highlighting useful automation features to fill in obvious steps and make formal proving nearly as straightforward as informal theorem proving. Finally, we make comparisons with formal theorem-proving in other systems where similar claims about QPE have been proven.
description: 28 pages, 18 figures, 5 tables. Prove-It theorem-proving results available at http://pyproveit.org/ and Prove-It code available at https://github.com/PyProveIt/Prove-It
Online Appendix A; Online Appendix B; Online Appendix C; Online Appendix D from Decline and recovery of a large carnivore: environmental change and long-term trends in an endangered brown bear population
Creators: name: Cano, Isabel Martínez
name: Taboada, Fernando González
name: Naves, Javier
name: Fernández-Gil, Alberto
name: Wiegand, Thorsten
Publisher: name: The Royal Society
Year: 2016
Subjects: subject: Environmental Science
subject: Ecology
subject: FOS: Biological sciences
subject: 60801 Animal Behaviour

description: Background information and description of the data; Figures and Tables; ODD description of the brown bear model.; Model fitting and inference.
Testing for linearity in scalar-on-function regression with responses missing at random
Creators: name: Febrero-Bande, Manuel
name: Galeano, Pedro
name: García-Portugués, Eduardo
name: González-Manteiga, Wenceslao
Publisher: name: arXiv
Year: 2023
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences
subject: 62G10, 62J05, 62G09

description: A goodness-of-fit test for the Functional Linear Model with Scalar Response (FLMSR) with responses Missing at Random (MAR) is proposed in this paper. The test statistic relies on a marked empirical process indexed by the projected functional covariate and its distribution under the null hypothesis is calibrated using a wild bootstrap procedure. The computation and performance of the test rely on having an accurate estimator of the functional slope of the FLMSR when the sample has MAR responses. Three estimation methods based on the Functional Principal Components (FPCs) of the covariate are considered. First, the simplified method estimates the functional slope by simply discarding observations with missing responses. Second, the imputed method estimates the functional slope by imputing the missing responses using the simplified estimator. Third, the inverse probability weighted method incorporates the missing response generation mechanism when imputing. Furthermore, both cross-validation and LASSO regression are used to select the FPCs used by each estimator. Several Monte Carlo experiments are conducted to analyze the behavior of the testing procedure in combination with the functional slope estimators. Results indicate that estimators performing missing-response imputation achieve the highest power. The testing procedure is applied to check for linear dependence between the average number of sunny days per year and the mean curve of daily temperatures at weather stations in Spain.
description: 21 pages, 6 figures, 4 tables
title: Spectroscopic imaging STM study of the interplay between magnetism and superconductivity in iron-based superconductors
Creators: name: Aluru, Rama K P
Publisher: name: University of St Andrews
publisherIdentifier: https://ror.org/02wn5qz54
publisherIdentifierScheme: ROR
Year: 2017

description: The discovery of high-temperature superconductivity in 1986 in copper-oxide materials have opened up new avenues to investigate new families of quantum materials that were previously not known. Understanding the mechanism of superconductivity in high-T[sub]c superconductors has been an important research theme in condensed matter physics, as it is believed to be essential to realize the next generation engineered materials that become superconducting at room temperature. Discovered in 2006, iron based superconductors are a new addition to the family of high-T[sub]c superconductors, these materials exhibit several interesting properties and show some vivid similarities with cuprates and other families of high-temperature superconductors. In this thesis, I will present the spin-polarized scanning tunneling microscopy (SPSTM) study carried out on the parent compound of iron chalcogenide high temperature superconductor Fe[sub](1+y)Te to investigate the bi-collinear antiferromagnetic order. Magnetic tips in this work are prepared using a novel preparation technique by picking up excess iron atoms and clusters of FeTe from the surface of the sample. Next, I will present the SP-STM results obtained in the spin glass phase of Fe[sub](1+y)SeₓTe₁₋ₓ visualizing the interplay between the short ranged bi-directional bi-collinear antiferromagnetic order and superconductivity at the atomic scale. In this thesis, I will also present the scanning tunneling microscopy and spectroscopy (STM/STS) study of the native and engineered defect bound states in the iron-pnictide superconductor LiFeAs. This study addresses the pairing symmetry of the superconducting order parameter and understanding of dip-hump features seen in STM spectra outside the superconducting gap in iron pnictide superconductor LiFeAs.
Langmore_tables_figures_ESM from Egg size investment in superb fairy-wrens: helper effects are modulated by climate
Creators: name: N. E. Langmore
name: L. D. Bailey
name: R. G. Heinsohn
name: A. F. Russell
name: R. M. Kilner
Publisher: name: The Royal Society
Year: 2016
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: 60801 Animal Behaviour

description: Tables S1,S2, S3, Figures S1, S2, S3, S4, S5, S6, S7
Gradient-less Federated Gradient Boosting Trees with Learnable Learning Rates
Creators: name: Ma, Chenyang
name: Qiu, Xinchi
name: Beutel, Daniel J.
name: Lane, Nicholas D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: The privacy-sensitive nature of decentralized datasets and the robustness of eXtreme Gradient Boosting (XGBoost) on tabular data raise the needs to train XGBoost in the context of federated learning (FL). Existing works on federated XGBoost in the horizontal setting rely on the sharing of gradients, which induce per-node level communication frequency and serious privacy concerns. To alleviate these problems, we develop an innovative framework for horizontal federated XGBoost which does not depend on the sharing of gradients and simultaneously boosts privacy and communication efficiency by making the learning rates of the aggregated tree ensembles learnable. We conduct extensive evaluations on various classification and regression datasets, showing our approach achieves performance comparable to the state-of-the-art method and effectively improves communication efficiency by lowering both communication rounds and communication overhead by factors ranging from 25x to 700x. Project Page: https://flower.ai/blog/2023-04-19-xgboost-with-flower/
description: Accepted at the 3rd ACM Workshop on Machine Learning and Systems (EuroMLSys), May 8th 2023, Rome, Italy
title: 01_2741
Creators: name: Wesley Baldwin, John
name: Baldwin, John W.
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2018
Subjects: subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: L'ensemble de ces notes ont été crée par John Baldwin lors d'une de ses premières périodes de résidence à Paris. Ces documents comprennent tous les magistri qu’il avait pu rencontrer dans ses sources. Aux XIIème et XIIIème siècles, les universités n'existant pas encore, le titre de magister s'il évoque certainement une compétence n'est pas rattaché de façon systématique au passage par les écoles. De surcroît, les magistris sont le plus souvent désignés par leur seul prénom. La lecture de ces données est donc difficile et suppose un long travail pour tenter d'identifier un individu auquel on pourrait rattacher plusieurs mentions. John Baldwin avait donc renoncé à utiliser ces données pour donner un prolongement à sa magnifique étude sur les gradués d'université et leur emploi par les Capétiens et les Plantagenêts. Néanmoins, il a conservé ces données et elles sont potentiellement très utile dans le cadre de Studium, comme le sont toutes les mentions dans les volumes des Fasti Ecclesiae Gallicanae de chanoines portant ce titre de magister sans autres précisions. L'ampleur des dépouillements rend ces données très utiles et nous devons une grande reconnaissance à John Baldwin pour avoir pris la peine de faire photocopier ses fiches et de nous les avoir transmises amicalement.
Les données ainsi que les images des fiches sont accessibles sur le site Internet à l'adresse suivante : http://studium-baldwin.lamop.fr/.
Les transcriptions des fiches ont été effectuées par des étudiants de Paris 1 Panthéon - Sorbonne mais elles n'ont pas été corrigées par la suite.
description: Relation: https://lamop.hypotheses.org/
Quantum Architecture Search for Quantum Monte Carlo Integration via Conditional Parameterized Circuits with Application to Finance
Creators: name: Wolf, Mark-Oliver
name: Ewen, Tom
name: Turkalj, Ivica
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Pricing of Securities (q-fin.PR)
subject: FOS: Physical sciences
subject: FOS: Economics and business

description: Classical Monte Carlo algorithms can theoretically be sped up on a quantum computer by employing amplitude estimation (AE). To realize this, an efficient implementation of state-dependent functions is crucial. We develop a straightforward approach based on pretraining parameterized quantum circuits, and show how they can be transformed into their conditional variant, making them usable as a subroutine in an AE algorithm. To identify a suitable circuit, we propose a genetic optimization approach that combines variable ansatzes and data encoding. We apply our algorithm to the problem of pricing financial derivatives. At the expense of a costly pretraining process, this results in a quantum circuit implementing the derivatives' payoff function more efficiently than previously existing quantum algorithms. In particular, we compare the performance for European vanilla and basket options.
description: 10 pages, 12 figures, 2 algorithms
Complementarity between decoherence and information retrieval from the environment
Creators: name: Lee, Tae-Hun
name: Korbicz, Jarosław K.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We address the problem of fundamental limitations of information extraction from the environment in open quantum systems. We derive a model-independent, hybrid quantum-classical solution of open dynamics in the recoil-less limit, which includes environmental degrees of freedom. Specifying to the celebrated Caldeira-Leggett model of hot thermal environments, ubiquitous in everyday situations, we reveal the existence of a new lengthscale, called distinguishability length, different from the well-known thermal de Broglie wavelength that governs the decoherence. Interestingly, a new integral kernel, called Quantum Fisher Information kernel, appears in the analysis. It complements the well-known dissipation and noise kernels and satisfies disturbance-information gain type of relations, similar to the famous fluctuation-dissipation relation. Our results complement the existing treatments of the Caldeira-Legget model from a non-standard and highly non-trivial perspective of information dynamics in the environment. This leads to a full picture of how the open evolution looks like from both the system and the environment points of view, as well as sets limits on the precision of indirect observations.
description: Published version, title changed, 12 pages, 1 figure
Supplementary_Materials_and_Methods from Next-generation freshwater bioassessment: eDNA metabarcoding with a conserved metazoan primer reveals species-rich and reservoir-specific communities
Creators: name: Lim, Nicholas K. M.
name: Ywee Chieh Tay
name: Srivathsan, Amrita
name: Tan, Jonathan W. T.
name: Kwik, Jeffrey T. B.
name: Bilgenur Baloğlu
name: Meier, Rudolf
name: Yeo, Darren C. J.
Publisher: name: The Royal Society
Year: 2016
Subjects: subject: Environmental Science
subject: 60102 Bioinformatics
subject: FOS: Computer and information sciences
subject: 60301 Animal Systematics and Taxonomy
subject: FOS: Biological sciences
subject: 60310 Plant Systematics and Taxonomy

description: Freshwater habitats are of high conservation value and provide a wide range of ecosystem services. Effective management requires regular monitoring. However, conventional methods based on direct observation or specimen collection are so invasive, expensive and labour-intensive that frequent monitoring is uncommon. Here, we test whether the evaluation of environmental DNA (eDNA) from water based on a simple protocol can be used for assessing biodiversity. We use universal metazoan primers for characterizing water eDNA across horizontal and vertical spatial dimensions in two reservoirs with known species diversity for two key taxa. eDNA obtained directly from 42 samples × 15 ml water (total = 630 ml) per reservoir yielded DNA signatures for more than 500 metazoan species, of which 105 could be identified to species/genus based on DNA barcodes. We show that eDNA can be used to assign each water sample to its reservoir of origin, and that eDNA outperforms conventional survey methods in single-sample richness comparisons, while revealing evidence for hundreds of unknown species that are undetected by conventional bioassessment methods. eDNA also confirms the presence of a recently discovered invasive snail species and provides evidence for the survival of a rare native species of goby not sighted in that habitat since 2007. eDNA thus promises to be a useful addition to the bioassessment toolbox for freshwater systems.
Triangular tessellations of one-loop scattering amplitudes in $ϕ^3$ theory
Creators: name: Das, Abhijit B.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Inspired by the recent work of Nima Arkani Hamed and collaborators who introduced the notion of positive geometry to account for the structure of tree-level scattering amplitudes in bi-adjoint $ϕ^3$ theory, which led to one-loop descriptions of the integrands. Here we consider the one-loop integrals themselves in $ϕ^3$ theory. In order to achieve this end, the geometrical construction offered by Schnetz for Feynman diagrams is hereby extended, and the results are presented. The extension relies on masking the loop momentum variable with a constant and proceeding with the calculations. The results appear as a construction given in a diagrammatic manner. The significance of the resulting triangular diagrams is that they have a common side amongst themselves for the corresponding Feynman diagrams they pertain to. Further extensions to this mathematical construction can lead to additional insights into higher loops. A mathematica code has been provided in order to generate the final results given the initial parameters of the theory.
description: 35 pages, 15 figures, 1 table, 4 mathematica notebooks given as ancillary files
Electronic Supplementary Material for Radford et al. from Within-group behavioural consequences of between-group conflict: a prospective review
Creators: name: Radford, Andrew N.
name: Majolo, Bonaventura
name: Aureli, Filippo
Publisher: name: The Royal Society
Year: 2016
Subjects: subject: 60801 Animal Behaviour
subject: FOS: Biological sciences

description: Definitions of key terms used in the review
Intrinsically episodic Antarctic shelf intrusions of circumpolar deep water via canyons
Creators: name: Ong, Ellie Q. Y.
name: Doddridge, Edward
name: Constantinou, Navid C.
name: Hogg, Andrew McC.
name: England, Matthew H.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: The structure of the Antarctic Slope Current at the continental shelf is crucial in governing the poleward transport of warm water. Canyons on the continental slope may provide a pathway for warm water to cross the slope current and intrude onto the continental shelf underneath ice shelves, which can increase rates of ice shelf melting, leading to reduced buttressing of ice shelves, accelerating glacial flow and hence increased sea level rise. Observations and modelling studies of the Antarctic Slope Current and cross-shelf warm water intrusions are limited, particularly in the East Antarctica region. To explore this topic, an idealised configuration of the Antarctic Slope Current is developed, using an eddy-resolving isopycnal model that emulates the dynamics and topography of the East Antarctic sector. Warm water intrusions via canyons are found to occur in discrete episodes of large onshore flow induced by eddies, even in the absence of any temporal variability in external forcings, demonstrating the intrinsic nature of these intrusions to the slope current system. Canyon width is found to play a key role in modulating cross-shelf exchanges; warm water transport through narrower canyons is more irregular than transport through wider canyons. The intrinsically episodic cross-shelf transport is found to be driven by feedbacks between wind energy input and eddy generation in the Antarctic Slope Current. Improved understanding of the intrinsic variability of warm water intrusions can help guide future observational and modelling studies in the analysis of eddy impacts on Antarctic shelf circulation.
Codesign of quantum error-correcting codes and modular chiplets in the presence of defects
Creators: name: Lin, Sophia Fuhui
name: Viszlai, Joshua
name: Smith, Kaitlin N.
name: Ravi, Gokul Subramanian
name: Yuan, Charles
name: Chong, Frederic T.
name: Brown, Benjamin J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Fabrication errors pose a significant challenge in scaling up solid-state quantum devices to the sizes required for fault-tolerant (FT) quantum applications. To mitigate the resource overhead caused by fabrication errors, we combine two approaches: (1) leveraging the flexibility of a modular architecture, (2) adapting the procedure of quantum error correction (QEC) to account for fabrication defects. We simulate the surface code adapted to qubit arrays with arbitrarily distributed defects to find metrics that characterize how defects affect fidelity. We then determine the impact of defects on the resource overhead of realizing a fault-tolerant quantum computer, on a chiplet-based modular architecture. Our strategy for dealing with fabrication defects demonstrates an exponential suppression of logical failure where error rates of non-faulty physical qubits are ~0.1% in a circuit-based noise model. This is a typical regime where we imagine running the defect-free surface code. We use our numerical results to establish post-selection criteria for building a device from defective chiplets. Using our criteria, we then evaluate the resource overhead in terms of the average number of fabricated physical qubits per logical qubit. We find that an optimal choice of chiplet size, based on the defect rate and target fidelity, is essential to limiting any additional error correction overhead due to defects. When the optimal chiplet size is chosen, at a defect rate of 1% the resource overhead can be reduced to below 3X and 6X respectively for the two defect models we use, for a wide range of target performance. We also determine cutoff fidelity values that help identify whether a qubit should be disabled or kept as part of the error correction code.
description: In ASPLOS 2024: the 29th ACM International Conference on Architectural Support for Programming Languages and Operating Systems
Experimental Realization of Entangled Coherent States in Two-dimensional Harmonic Oscillators of a Trapped Ion
Creators: name: Jeon, Honggi
name: Kang, Jiyong
name: Kim, Jaeun
name: Choi, Wonhyeong
name: Kim, Kyunghye
name: Kim, Taehyun
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Entangled coherent states play pivotal roles in various fields such as quantum computation, quantum communication, and quantum sensing. We experimentally demonstrate the generation of entangled coherent states with the two-dimensional motion of a trapped ion system. Using Raman transitions with appropriate detunings, we simultaneously drive the red and blue sidebands of the two transverse axes of a single trapped ion and observe multi-periodic entanglement and disentanglement of its spin and two-dimensional motion. Then, by measuring the spin state, we herald entangled coherent states of the transverse motions of the trapped ion and observe the corresponding modulation in the parity of the phonon distribution of one of the harmonic oscillators. Lastly, we trap two ions in a linear chain and realize Molmer-Sorensen gate using two-dimensional motion.
Electronic Supplementary Material from Tumour-suppressor microRNAs regulate ovarian cancer cell physical properties and invasive behaviour
Creators: name: Chan, Clara K.
name: Yinghong Pan
name: Nyberg, Kendra
name: Marra, Marco A.
name: Lim, Emilia L.
name: Jones, Steven J. M.
name: Maar, Dianna
name: Gibb, Ewan A.
name: Preethi H. Gunaratne
name: A. Gordon Robertson
name: Rowat, Amy C.
Publisher: name: The Royal Society
Year: 2016
Subjects: Biophysics
Cell Biology
Molecular Biology

description: Tumour-suppressor microRNAs regulate ovarian cancer cell physical properties and invasive behaviour
Geometric Prior Based Deep Human Point Cloud Geometry Compression
Creators: name: Wu, Xinju
name: Zhang, Pingping
name: Wang, Meng
name: Chen, Peilin
name: Wang, Shiqi
name: Kwong, Sam
Publisher: name: arXiv
Year: 2023
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: The emergence of digital avatars has raised an exponential increase in the demand for human point clouds with realistic and intricate details. The compression of such data becomes challenging with overwhelming data amounts comprising millions of points. Herein, we leverage the human geometric prior in geometry redundancy removal of point clouds, greatly promoting the compression performance. More specifically, the prior provides topological constraints as geometry initialization, allowing adaptive adjustments with a compact parameter set that could be represented with only a few bits. Therefore, we can envisage high-resolution human point clouds as a combination of geometric priors and structural deviations. The priors could first be derived with an aligned point cloud, and subsequently the difference of features is compressed into a compact latent code. The proposed framework can operate in a play-and-plug fashion with existing learning based point cloud compression methods. Extensive experimental results show that our approach significantly improves the compression performance without deteriorating the quality, demonstrating its promise in a variety of applications.
description: Accepted by TCSVT 2024
Fuzzy multiplier, sum and intersection rules in non-Lipschitzian settings: decoupling approach revisited
Creators: name: Fabian, Marián
name: Kruger, Alexander Y.
name: Mehlitz, Patrick
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 49J52, 49J53, 49K27

description: We revisit the decoupling approach widely used (often intuitively) in nonlinear analysis and optimization and initially formalized about a quarter of a century ago by Borwein & Zhu, Borwein & Ioffe and Lassonde. It allows one to streamline proofs of necessary optimality conditions and calculus relations, unify and simplify the respective statements, clarify and in many cases weaken the assumptions. In this paper we study weaker concepts of quasiuniform infimum, quasiuniform lower semicontinuity and quasiuniform minimum, putting them into the context of the general theory developed by the aforementioned authors. On the way, we unify the terminology and notation and fill in some gaps in the general theory. We establish rather general primal and dual necessary conditions characterizing quasiuniform $\varepsilon$-minima of the sum of two functions. The obtained fuzzy multiplier rules are formulated in general Banach spaces in terms of Clarke subdifferentials and in Asplund spaces in terms of Fréchet subdifferentials. The mentioned fuzzy multiplier rules naturally lead to certain fuzzy subdifferential calculus results. An application from sparse optimal control illustrates applicability of the obtained findings.
description: 40 pages
Effective and geographically balanced? An output-based assessment of non-state climate actions
Creators: name: Chan, Sander
name: Falkner, Robert
name: Goldberg, Matthew
name: Asselt, Harro Van
Publisher: name: Taylor & Francis
Year: 2016
Subjects: subject: Medicine
subject: 59999 Environmental Sciences not elsewhere classified
subject: FOS: Earth and related environmental sciences
subject: Science Policy
subject: Sociology
subject: FOS: Sociology
subject: Developmental Biology
subject: Plant Biology
subject: FOS: Biological sciences

description: At COP21 in Paris, governments reiterated the importance of ‘non-Party’ contributions, placing big bets that the efforts of cities, regions, investors, companies, and other social groups will help keep average global warming limited to well under 2°C. However, there is little systematic knowledge concerning the performance of non-state and subnational efforts. We established a database of 52 climate actions launched at the 2014 UN Climate Summit in New York to assess output performance – that is, the production of relevant outputs – to understand whether they are likely to deliver social and environmental impacts. Moreover, we assess to which extent climate actions are implemented across developed and developing countries. We find that climate actions are starting to deliver, and output performance after one year is higher than one might expect from previous experiences with similar actions. However, differences exist between action areas: resilience actions have yet to produce specific outputs, whereas energy and industry actions perform above average. Furthermore, imbalances between developing and developed countries persist. While many actions target low-income and lower-middle-income economies, the implementation gap in these countries remains greater. More efforts are necessary to mobilize and implement actions that benefit the world’s most vulnerable people. Policy relevance Climate actions by non-state and subnational actors are an important complement to the multilateral climate regime and the associated contributions made by national governments. Although such actions hold much potential, we still know very little about how they could deliver in practice. This article addresses this knowledge gap, by showing how 52 climate actions announced at the UN Climate Summit in 2014 have performed thus far. Based on our analysis, we argue that the post-Paris action agenda for non-state and subnational climate action should (1) find more effective ways to incentivize private sector actors to engage in transnational climate governance through actions that seek to reduce greenhouse gas emissions and promote climate resilience in a tangible manner; (2) identify factors underlying effectiveness, to take appropriate measures to support underperforming climate actions; and (3) address the large implementation gap of climate actions in developing countries.