cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Helicity-dependent optical control of the magnetization state emerging from the Landau-Lifshitz-Gilbert equation
Creators: name: Assouline, Benjamin
name: Capua, Amir
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: It is well known that the Gilbert relaxation time of a magnetic moment scales inversely with the magnitude of the externally applied field, H, and the Gilbert damping, α. Therefore, in ultrashort optical pulses, where H can temporarily be extremely large, the Gilbert relaxation time can momentarily be extremely short, reaching even picosecond timescales. Here we show that for typical ultrashort pulses, the optical control of the magnetization emerges by merely considering the optical magnetic field in the Landau-Lifshitz-Gilbert (LLG) equation. Surprisingly, when circularly polarized optical pulses are introduced to the LLG equation, an optically induced helicity-dependent torque results. We find that the strength of the interaction is determined by η=αγH/f_opt, where f_opt and γ are the optical frequency and gyromagnetic ratio. Our results illustrate the generality of the LLG equation to the optical limit and the pivotal role of the Gilbert damping in the general interaction between optical magnetic fields and spins in solids.
description: 12 pages, 3 figures
Proton fraction in neutron star matter: Dynamical mean-field approach
Creators: name: Velikanov, Maxim
name: Rubtsov, Alexey N.
name: Krippa, Boris
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Dynamical mean field theory (DMFT) is used to study neutron matter, both with and without admixture of the proton fraction. The system is approximated by the lattice Habbard model. The corresponding equation of state as a function of temperature/density/asymmetry is investigated. The results are compared with the standard mean field (MF) approach where the effect of local correlations is neglected. Whereas the influence of the correlations on the properties of a pure neutron matter is found to be moderate, it becomes strong when the proton admixture is taken into account. In particular, we calculate the proton fraction, energy density and pressure in outer core of neutron stars, taking into account the beta equilibrium condition. The DMFT predicts that the proton fraction is several times the MF based calculations, whereas the DMFT results for energy density and pressure are 30-40\% lower then the corresponding MF estimates. Physical implications of our findings for a neutron star dynamics are discussed.
Behaviour of the topological susceptibility in two colour QCD across the finite density transition
Creators: name: Alles, B.
name: D'Elia, M.
name: Lombardo, M. P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The behaviour of the topological susceptibility χin QCD with two colours and 8 flavours of quarks is studied at nonzero temperature on the lattice across the finite density transition. It is shown that the signal of χdrops abruptly at a critical chemical potential μ_c, much as it happens at the finite temperature and zero density transition. The Polyakov loop and the chiral condensate undergo their transitions at the same critical value μ_c. At a value μ_s of the chemical potential, called saturation point, which in our case satisfies μ_s > μ_c, Pauli blocking supervenes and consequently the theory becomes quenched.
description: Latex file, 28 pages, 6 Figures, revised version with further study of Pauli blocking, phase diagram, physical units and the HMD algorithm. A few misprints corrected. Some references added
Shimura correspondence for level p^2 and the central values of L-series
Creators: name: Pacetti, Ariel
name: Tornaría, Gonzalo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F37, 11F67

description: Given a weight 2 and level p^2 modular form f, we construct two weight 3/2 modular forms (possibly zero) of level 4p^2 and non trivial character mapping to f via the Shimura correspondence. Then we relate the coefficients of the constructed forms to the central value of the L-series of certain imaginary quadratic twists of f. Furthermore, we give a general framework for our construction that applies to any order in definite quaternion algebras, with which one can, in principle, construct weight 3/2 modular forms of any level, provided one knows how to compute ideal classes representatives.
description: 17 pages
Phosphorylation-state dependent intraneuronal sorting of Aβ differentially impairs autophagy and the endo-lysosomal system
Creators: name: Kapadia, Akshay
name: Theil, Sandra
name: Opitz, Sabine
name: Villacampa, Nàdia
name: Beckert, Hannes
name: Schoch-McGovern, Susanne
name: Heneka, Michael. T.
name: Kumar, Sathish
name: Walter, Jochen
Publisher: name: Taylor & Francis
Year: 2023
Subjects: Biochemistry
Cell Biology
Neuroscience

description: Progressive accumulation of amyloid-β (Aβ) aggregates in extracellular plaques is a characteristic hallmark of Alzheimer disease (AD). Aβ is also found in intraneuronal deposits and associated with alterations of the endo-lysosomal system and impairment of macroautophagy/autophagy. Here, we assessed the effect of Aβ phosphorylation on neuronal autophagy and the endo-lysosomal pathway. Analysis of APP-PSEN1dE9 transgenic mice revealed a phosphorylation-state dependent intraneuronal accumulation of Aβ species in endo-lysosomal and autophagy-related compartments. Cell biological studies further demonstrate a differential uptake and sorting of phosphorylated Aβ variants in cultured neurons, and phosphorylation-state specific effects of Aβ variants on neuronal autophagy and lysosomal function. While Aβ phosphorylated at serine residue 8 accumulated in autophagosomes, Aβ phosphorylated at serine residue 26 showed efficient transport to lysosomes. The selective sorting of phosphorylated Aβ species caused differential impairment of vesicular transport and lysosomal function associated with neurotoxicity. Thus, the relative occurrence of phosphorylated Aβ species and their intraneuronal accumulation could contribute to AD pathogenesis, and to the commonly observed aberrations of the vesicular transport system already at the early stages of the disease.
ความเข้าใจและมุมมองของครูเกี่ยวกับสะเต็มศึกษาและการออกแบบเชิงวิศวกรรม
Creators: name: ลือชา ลดาชาติ
name: วิลาวัลย์ โพธิ์ทอง
name: วิไลภรณ์ ฤทธิคุปต์
name: ลฎาภา ลดาชาติ
Publisher: name: สำนักงานบริหารการวิจัย นวัตกรรมและการสร้างสรรค์
Year: 2562
Subjects: การออกแบบเชิงวิศวกรรม
ครูประจำการ
สะเต็มศึกษา

description: วารสารมหาวิทยาลัยศิลปากร, 39, 3, 133-149
Modelling protocol for the Urban-PLUMBER model evaluation project
Creators: name: Lipson, Mathew
name: Grimmond, Sue
name: Best, Martin
name: Abramowitz, Gab
name: De Kauwe, Martin
name: Aristofanis Tsiringakis
name: Demuzere, Matthias
name: Ward, Helen
name: Coutts, Andrew
name: Pitman, Andrew
Publisher: name: Zenodo
Year: 2020
Subjects: protocol
model evaluation

description: Instructions for participants of the Urban-PLUMBER evaluation project for modelling in urban areas. This protocol sets out: background and scope of the Urban-PLUMBER project expected project outputs experiments to be undertaken format of provided data (forcing and site description) format of requested model output For further project information see https://urban-plumber.github.io/
Strong and weak (1, 2) homotopies on knot projections and new invariants
Creators: name: Ito, Noboru
name: Takimura, Yusuke
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics

description: Every second flat Reidemeister move of knot projections can be decomposed into two types thorough an inverse or direct self-tangency modification, respectively called strong or weak, when orientations of the knot projections are arbitrarily provided. Further, we introduce the notions of strong and weak (1, 2) homotopies; we define that two knot projections are strongly (resp. weakly) (1, 2) homotopic if and only if two knot projections are related by a finite sequence of first and strong (resp. weak) second flat Reidemeister moves. This paper gives a new necessary and sufficient condition that two knot projections are not strongly (1, 2) homotopic. Similarly, we obtain a new necessary and sufficient condition in the weak (1, 2) homotopy case. We also define a new integer-valued strong (1, 2) homotopy invariant. Using it, we show that the set of the non-trivial prime knot projections without 1-gons that can be trivialized under strong (1, 2) homotopy is disjoint from that of weak (1, 2) homotopy. We also investigate topological properties of the new invariant and give its generalization, a comparison of our invariants and Arnold invariants, and a table of invariants.
description: 15 pages, 20 figures
RIDNet Assisted cGAN Based Channel Estimation for One-Bit ADC mmWave MIMO Systems
Creators: name: Karakoca, Erhan
name: Nayir, Hasan
name: Görçin, Ali
name: Qaraqe, Khalid
Publisher: name: arXiv
Year: 2023
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The estimation of millimeter wave (mmWave) massive multiple input multiple output (MIMO) channels becomes compelling when one-bit analog to digital converters (ADCs) are utilized. Furthermore, as the number of antenna increases, pilot overhead scales up to provide consistent channel estimation, eventually degrading spectral efficiency. This study presents a channel estimation approach that combines a conditional generative adversarial network (cGAN) with a novel blind denoising network with a sparse feature attention mechanism. Performance analysis and simulations show that using a cGAN fused with a feature attention-based denoising neural network significantly enhances the channel estimation performance while requiring less pilot transmission.
description: Accepted to VTC2023-Spring
Grammatical elicitation: Intransitive paradigms
Creators: name: Ramirez, Angela
name: Clem, Emily
name: Jung, Sihun
name: Lim, Jun Jie
name: Mayel, Milad
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: mvj

description: Elicitation of simple sentences involving different human subjects in the past tense in attempt to better understand intransitive verbs, person prefixes and enclitics. Elicitation leaders: Sihun Jung (recording 1, 2), Jun Jie Lim (recording 3, 4)
Flat-Space Limit of Holographic Pseudo Entropy in (A)dS Spacetimes
Creators: name: Fareghbal, Reza
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The real part of pseudo entropy in conformal field theories is holographically calculated by the area of some extremal spacelike surfaces in the dual dS and AdS spacetimes. We show that the flat-space limit of these curves in three-dimensional (A)dS spacetimes is well defined. We find that if the length of the curves is calculated from the radial coordinate where the retarded time is extremum, then after taking the flat-space limit, the entanglement entropy of the dual theory of three-dimensional flat spacetime is obtained. For dS spacetime, the radial coordinate corresponding to the extremum of retarded time is located inside the cosmological horizon. Our results suggest that on the field theory side, the entanglement entropy in the dual theory of flat spacetimes should be obtained from the ultra-relativistic limit of pseudo entropy in the dual CFT to (A)dS spacetimes.
description: 16 pages, V2: Ref. added, Published version
สื่อมวลชนกับการดูแลกำกับตนเอง
Creators: name: พัชราภา เอื้ออมรวนิช
Publisher: name: สำนักงานบริหารการวิจัย นวัตกรรมและการสร้างสรรค์
Year: 2562
Subjects: สื่อมวลชน
เสรีภาพ
การกำกับดูแลกันเอง

description: วารสารมหาวิทยาลัยศิลปากร, 39, 3, 150-161
Additional file 1 of “She mimicked the manipulations on my hand”: fostering embodied care among children with recurrent acute respiratory tract infections in Southern China
Creators: name: Yin, Lingjia
name: Chang, Bei
name: Lundborg, Cecilia Stålsby
name: Wu, Darong
name: Alvesson, Helle Mølsted
Publisher: name: figshare
Year: 2024
Subjects: subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Biotechnology
subject: Biological Sciences not elsewhere classified
subject: Science Policy
subject: Mental Health
subject: Infectious Diseases
subject: FOS: Health sciences

description: Supplementary Material 1
Critical line of the triangular Ising antiferromagnet in a field from a $C_3$-symmetric corner transfer matrix algorithm
Creators: name: Nyckees, Samuel
name: Rufino, Afonso
name: Mila, Frédéric
name: Colbois, Jeanne
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The corner transfer matrix renormalization group (CTMRG) algorithm has been extensively used to investigate both classical and quantum two-dimensional (2D) lattice models. The convergence of the algorithm can strongly vary from model to model depending on the underlying geometry and symmetries, and the presence of algebraic correlations. An important factor in the convergence of the algorithm is the lattice symmetry, which can be broken due to the necessity of mapping the problem onto the square lattice. We propose a variant of the CTMRG algorithm, designed for models with $C_3$-symmetry, which we apply to the conceptually simple yet numerically challenging problem of the triangular lattice Ising antiferromagnet in a field, at zero and low temperatures. We study how the finite-temperature three-state Potts critical line in this model approaches the ground-state Kosterlitz-Thouless transition driven by a reduced field ($h/T$). In this particular instance, we show that the $C_3$-symmetric CTMRG leads to much more precise results than both existing results from exact diagonalization of transfer matrices and Monte Carlo.
SWELTO -- Space WEather Laboratory in Turin Observatory
Creators: name: Bemporad, A.
name: Abbo, L.
name: Barghini, D.
name: Benna, C.
name: Biondo, R.
name: Bonino, D.
name: Capobianco, G.
name: Carella, F.
name: Cora, A.
name: Fineschi, S.
name: Frassati, F.
name: Gardiol, D.
name: Giordano, S.
name: Liberatore, A.
name: Mancuso, S.
name: Mignone, A.
name: Rasetti, S.
name: Reale, F.
name: Riva, A.
name: Salvati, F.
name: Susino, R.
name: Volpicelli, A.
name: Zangrilli, L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: SWELTO -- Space WEather Laboratory in Turin Observatory is a conceptual framework where new ideas for the analysis of space-based and ground-based data are developed and tested. The input data are (but not limited to) remote sensing observations (EUV images of the solar disk, Visible Light coronagraphic images, radio dynamic spectra, etc...), in situ plasma measurements (interplanetary plasma density, velocity, magnetic field, etc...), as well as measurements acquired by local sensors and detectors (radio antenna, fluxgate magnetometer, full-sky cameras, located in OATo). The output products are automatic identification, tracking, and monitoring of solar stationary and dynamic features near the Sun (coronal holes, active regions, coronal mass ejections, etc...), and in the interplanetary medium (shocks, plasmoids, corotating interaction regions, etc...), as well as reconstructions of the interplanetary medium where solar disturbances may propagate from the Sun to the Earth and beyond. These are based both on empirical models and numerical MHD simulations. The aim of SWELTO is not only to test new data analysis methods for future application for Space Weather monitoring and prediction purposes, but also to procure, test and deploy new ground-based instrumentation to monitor the ionospheric and geomagnetic responses to solar activity. Moreover, people involved in SWELTO are active in outreach to disseminate the topics related with Space Weather to students and the general public.
The old and the new of parity-violating two-pion-exchange $NN$ potential
Creators: name: Hyun, C. H.
name: Desplanques, B.
name: Ando, S.
name: Liu, C. -P.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We consider the parity-violating two-pion-exchange potential obtained from the covariant formalism in the past and the state-of-the-art effective field theory approach. We discuss the behavior of the potential in coordinate space and its application to the parity-violating asymmetry in $\vec{n} p \to d γ$ at threshold.
description: 4 pages, contribution to the conference Chiral07 held in Osaka, Japan, Nov. 13-16, 2007
Wa and Tatala: The Transformation of Indigenous Canoes on Yap and Orchid Island
Creators: name: Tu, Karen Kan-Lun
Publisher: name: The Australian National University
Year: 2018
Subjects: Wa, Tatala, Canoe, Revitalisation, Transformation, Yap, Orchid Island

description: This thesis focuses on the areas on Orchid Island in Taiwan and Yap State in the Federated States of Micronesia exploring the transformation of indigenous canoe usage. The canoe performs significant symbolic and practical functions for both of these areas, though they have also developed local–specific functions thanks to variations in their respective histories that involve a complex process of transformation and revitalisation in canoe culture and navigation. The main aims of the thesis are to analyse the different usages of indigenous canoes from the late nineteenth century to the present, to discuss how foreign and colonial powers influenced canoe usage, and how indigenous canoes have developed contemporary meanings over time. This comparative study is framed within a broad historical perspective of social and cultural change in the Pacific. I discuss the importance of cultural and historical factors that have influenced canoe functions and the central meaning of the canoe to Islanders today. I collect oral traditions, historical records and ethnographic research data to build a comparative study of indigenous and contemporary canoe designs, their evolving usages and sociological purposes, as well as local reactions and adaptations in canoe usage, as reflected in gender relations and the division of labour. Debates about appropriate canoe usage frequently emerge during contemporary cultural revivals and demonstrations, and this thesis focuses especially on how the Islanders appropriate the canoe as a symbol of cultural revitalisation and identity. This suggests further future possibilities of the canoe as a dynamic symbol of the Islanders’ identities and a reflection of their oceanic indigeneity.
Grammatical elicitation: Farm scenarios
Creators: name: Ramirez, Angela
name: Mayel, Milad
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: mvj

description: Elicitation of short, simple sentences regarding imagined farm scenarios. Related lexical items were also elicited in the form of common nouns. Sentences involved the past, present, and future interpretations.
Fader Networks for domain adaptation on fMRI: ABIDE-II study
Creators: name: Pominova, Marina
name: Kondrateva, Ekaterina
name: Sharaev, Maxim
name: Bernstein, Alexander
name: Burnaev, Evgeny
Publisher: name: arXiv
Year: 2020
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: ABIDE is the largest open-source autism spectrum disorder database with both fMRI data and full phenotype description. These data were extensively studied based on functional connectivity analysis as well as with deep learning on raw data, with top models accuracy close to 75\% for separate scanning sites. Yet there is still a problem of models transferability between different scanning sites within ABIDE. In the current paper, we for the first time perform domain adaptation for brain pathology classification problem on raw neuroimaging data. We use 3D convolutional autoencoders to build the domain irrelevant latent space image representation and demonstrate this method to outperform existing approaches on ABIDE data.
The limiting move-to-front search-cost in law of large numbers asymptotic regimes
Creators: name: Barrera, Javiera
name: Fontbona, Joaquín
Publisher: name: arXiv
Year: 2006
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: We explicitly compute the limiting transient distribution of the search-cost in the move-to-front Markov chain when the number of objects tends to infinity, for general families of deterministic or random request rates. Our techniques are based on a "law of large numbers for random partitions," a scaling limit that allows us to exactly compute limiting expectation of empirical functionals of the request probabilities of objects. In particular, we show that the limiting search-cost can be split at an explicit deterministic threshold into one random variable in equilibrium, and a second one related to the initial ordering of the list. Our results ensure the stability of the limiting search-cost under general perturbations of the request probabilities. We provide the description of the limiting transient behavior in several examples where only the stationary regime is known, and discuss the range of validity of our scaling limit.
description: Published in at http://dx.doi.org/10.1214/09-AAP635 the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Decision-Time Postponing Motion Planning for Combinatorial Uncertain Maneuvering
Creators: name: Taş, Ömer Şahin
name: Hauser, Felix
name: Stiller, Christoph
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Motion planning involves decision making among combinatorial maneuver variants in urban driving. A planner must consider uncertainties and associated risks of the maneuver variants, and subsequently select a maneuver alternative. In this paper we present a planning approach that considers the uncertainties in the prediction and, in case of high uncertainty, postpones the combinatorial decision making to a later time within the planning horizon. With our proposed approach, safe but at the same time not overconservative motion is planned.
description: 7 pages, 5 figures
Information theoretic measures for Lifshitz system
Creators: name: Paul, Souvik
name: Chowdhury, Anirban Roy
name: Saha, Ashis
name: Gangopadhyay, Sunandan
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this work, we have studied various mixed state information theoretic quantities for an excited state of Lifshitz spacetime in $3+1$-dimensions. This geometry is the gravity dual to a class of $2+1$-dimensional quantum field theories having Lifshitz symmetry. We have holographically calculated mutual information, entanglement wedge cross section, entanglement negativity and mutual complexity for strip like subsystems at the boundary. For this we have used the results of holographic entanglement entropy and complexity present in the literature. We first calculate all of these mentioned quantities for the pure state of Lifshitz spacetime. Then we have moved on to calculate all these quantities for excited state of the Lifshitz spacetime. The gravity dual of excited state of Lifshitz systems in field theory can be obtained by applying constant perturbations along the boundary direction. Further, we would like to mention that for the simplicity of calculation we are only considering results up to the first order in perturbation. The change in the obtained holographic information theoretic quantities are then related to entanglement entropy, entanglement pressure, entanglement chemical potential and charge using the stress tensor complex. These relations are analogous to the first law of entanglement thermodynamics given earlier in the literature. All the calculations are carried out for both values of dynamical scaling exponent ($z$) present in the Lifshitz field theory.
description: v1: 51 pages LaTex, multiple figures, v2: matches with the published version
Alternating current loss in radially arranged superconducting strips
Creators: name: Mawatari, Yasunori
name: Kajikawa, Kazuhiro
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Analytic expressions for alternating current (ac) loss in radially arranged superconducting strips are presented. We adopt the weight-function approach to obtain the field distributions in the critical state model, and we have developed an analytic method to calculate hysteretic ac loss in superconducting strips for small-current amplitude. We present the dependence of the ac loss in radial strips upon the configuration of the strips and upon the number of strips. The results show that behavior of the ac loss of radial strips carrying bidirectional currents differs significantly from that carrying unidirectional currents.
description: 4 pages, 2 figures, accepted for publication in Applied Physics Letters
Isolation and partial chemical characterization of an antimicrobial peptide produced by Bacillus subtilis
Creators: name: Bechard, Jeff
Publisher: name: University of British Columbia
Year: 2009

description: An endophytic bacterium (Bacillus subtilis EN 63-1) isolated from apple fruit produces an antibiotic which has been purified to homogeneity and partially characterized. It consists of an acidic peptide containing asparagine/aspartate, glutamine/glutamate, serine, glycine, alanine, proline, valine, and leucine in a ratio of 2:3:1:1:1:1:1:4. Based on its infrared spectrum, the peptide antibiotic contains an acyl chain and has a lactone bond in its structure. Its molecular weight, estimated by SDS-polyacrylamide gel electrophoresis, is 1.5 kDa; however, it forms aggregates in excess of 20 kDa. The peptide antibiotic is similar to a number of lipopeptide antibiotics often termed "biosurfactants" and classified as fatty acid containing peptolides. The antibiotic has a broad spectrum of antimicrobial activity against Gram negative bacteria, shows little activity against Gram positive bacteria, and displays some anti-fungal activity. Studies on the effect of the peptide on Agrobacterium vitis cells suggest a bactericidal mode of action rather than a bacteriostatic effect; however, cell death is not associated with cell lysis. Antimicrobial activity is associated with the active growth of the producing organism rather than with the stationary phase. The activity of the peptide antibiotic is stable over a fairly wide range of pH and temperature. Peptide activity begins to decrease at alkaline pH, but is stable at neutral and acidic pH. Complete loss of activity is observed above pH 10. At an acidic pH (pH 3.0) the peptide begins to lose activity above 60°C, demonstrating a complete loss of activity at 100°C; however, at neutral pH the peptide remains stable up to 80°C and a complete loss of activity is not observed at 100°C.
On the gravitational diagram technique in the discrete setup
Creators: name: Khatsymovsky, V. M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences
subject: 83C27, 81S40

description: This article is in the spirit of our work on the consequences of the Regge calculus, where some edge length scale arises as an optimal initial point of the perturbative expansion after functional integration over connection.
 Now consider the perturbative expansion itself. To obtain an algorithmizable diagram technique, we consider the simplest periodic simplicial structure with a frozen part of the variables ("hypercubic"). After functional integration over connection, the system is described by the metric $g_{λμ}$ at the sites.
 We parameterize $g_{λμ}$ so that the functional measure becomes Lebesgue. The discrete diagrams are free from ultraviolet divergences and reproduce (for ordinary, non-Planck external momenta) those continuum counterparts that are finite. We give the parametrization of $g_{λμ}$ up to terms, providing, in particular, additional three-graviton and two-graviton-two-matter vertices, which can give additional one-loop corrections to the Newtonian potential.
 The edge length scale is $\sim \sqrt{ η}$, where $η$ defines the free factor $ ( - \det \| g_{λμ} \| )^{ η/ 2}$ in the measure and should be a large parameter to ensure the true action after integration over connection. We verify the important fact that the perturbative expansion does not contain increasing powers of $η$ if its initial point is chosen close enough to the maximum point of the measure, thus justifying this choice.
 Discrete propagators depend on the Barbero-Immirzi parameter $γ$, which determines the ratio of timelike and spacelike elementary length scales. The existing estimates of $γ$ allow the propagator poles to have real energy for any (real) spatial momenta.
description: 46 pages, 5 figures, typos corrected, refs added, typical diagrams added
Dilute Liquid of Instanton and Its Topological Charge Dominate the QCD Vacuum
Creators: name: Wang, Z. Q.
name: Lu, X. F.
name: Wang, Fan
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: APE smearing and overlap-Dirac operator are combined to filter QCD vacuum configurations. The results obtained from overlap fermions and improved 5Li cooling are compared, both of them exhibit structures of dilute liquid of instanton. Finally the overlap fermions, improved 5Li cooling and APE smearing are combined to calculate the topological charge and identify the structure of QCD vacuum. The results suggest dilute liquid of instanton dominance of topological charge fluctuations in quenched lattice QCD.
description: 5 pages, 3 figures, 2 tables talk presented on the SINO-Japan nuclear physics collaboration meeting, May 15-20, Shanghai, China
Synaptic metaplasticity with multi-level memristive devices
Creators: name: D'Agostino, Simone
name: Moro, Filippo
name: Hirtzlin, Tifenn
name: Arcamone, Julien
name: Castellani, Niccolò
name: Querlioz, Damien
name: Payvand, Melika
name: Vianello, Elisa
Publisher: name: arXiv
Year: 2023
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Deep learning has made remarkable progress in various tasks, surpassing human performance in some cases. However, one drawback of neural networks is catastrophic forgetting, where a network trained on one task forgets the solution when learning a new one. To address this issue, recent works have proposed solutions based on Binarized Neural Networks (BNNs) incorporating metaplasticity. In this work, we extend this solution to quantized neural networks (QNNs) and present a memristor-based hardware solution for implementing metaplasticity during both inference and training. We propose a hardware architecture that integrates quantized weights in memristor devices programmed in an analog multi-level fashion with a digital processing unit for high-precision metaplastic storage. We validated our approach using a combined software framework and memristor based crossbar array for in-memory computing fabricated in 130 nm CMOS technology. Our experimental results show that a two-layer perceptron achieves 97% and 86% accuracy on consecutive training of MNIST and Fashion-MNIST, equal to software baseline. This result demonstrates immunity to catastrophic forgetting and the resilience to analog device imperfections of the proposed solution. Moreover, our architecture is compatible with the memristor limited endurance and has a 15x reduction in memory
description: AICAS2023 proceedings (oral presentation and discussion already done on 12/06/2023)
Extended Falicov-Kimball model at weak onsite and intersite Coulomb interactions
Creators: name: Kapcia, K. J.
name: Krawczyk, J.
name: Lemański, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We analyze in detail a behavior of the order parameter in the half-filled extended Falicov-Kimball model for small Coulomb interactions (both onsite $U$ and intersite $V$). The parameter is defined as the difference of localized electron concentrations in both sublattices of the Bethe lattice (in the limit of large coordination number). Using two methods, namely, the dynamic mean field theory and the Hartree-Fock approximation, we found the ranges of $U$ and $V$ for which the anomalous temperature dependence of the order parameter, characterized by the sharp reduction near $T \approx T_{\textrm{C}}/2$, occurs ($T_{\textrm{C}}$ is the temperature of the continuous order-disorder transition). In order to quantitatively describe this anomaly, we defined a function that measures the departure of the order parameter dependence from the standard mean-field $S=1/2$ Ising-like curve. We determined the $U$-dependent critical value $V_{\textrm{C}}$ of $V$ above which the anomaly disappears. Indicators of the anomalous behavior of the parameter dependence can be also observed in the temperature dependence of the specific heat.
description: 11 pages, 6 figures
Quantum secret sharing based on modulated high-dimensional time-bin entanglement
Creators: name: Takesue, Hiroki
name: Inoue, Kyo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose a new scheme for quantum secret sharing (QSS) that uses a modulated high-dimensional time-bin entanglement. By modulating the relative phase randomly by {0,pi}, a sender with the entanglement source can randomly change the sign of the correlation of the measurement outcomes obtained by two distant recipients. The two recipients must cooperate if they are to obtain the sign of the correlation, which is used as a secret key. We show that our scheme is secure against intercept-and-resend (I-R) and beam splitting attacks by an outside eavesdropper thanks to the non-orthogonality of high-dimensional time-bin entangled states. We also show that a cheating attempt based on an I-R attack by one of the recipients can be detected by changing the dimension of the time bin entanglement randomly and inserting two "vacant" slots between the packets. Then, cheating attempts can be detected by monitoring the count rate in the vacant slots. The proposed scheme has better experimental feasibility than previously proposed entanglement-based QSS schemes.
description: To appear in Phys. Rev. A
Arrangement of nearby minima and saddles in the mixed spherical energy landscapes
Creators: name: Kent-Dobias, Jaron
Publisher: name: arXiv
Year: 2023
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The mixed spherical models were recently found to violate long-held assumptions about mean-field glassy dynamics. In particular, the threshold energy, where most stationary points are marginal and that in the simpler pure models attracts long-time dynamics, seems to lose significance. Here, we compute the typical distribution of stationary points relative to each other in mixed models with a replica symmetric complexity. We examine the stability of nearby points, accounting for the presence of an isolated eigenvalue in their spectrum due to their proximity. Despite finding rich structure not present in the pure models, we find nothing that distinguishes the points that do attract the dynamics. Instead, we find new geometric significance of the old threshold energy, and invalidate pictures of the arrangement of most marginal inherent states into a continuous manifold.
description: Submission to SciPost
Effects from Dark Matter Halos on X-ray Pulsar Pulse Profiles
Creators: name: Liu, Yukun
name: Li, Hong-Bo
name: Gao, Yong
name: Shao, Lijing
name: Hu, Zexin
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Neutron stars (NSs) can capture dark matter (DM) particles because of their deep gravitational potential and high density. The accumulated DM can affect the properties of NSs. In this work we use a general relativistic two-fluid formalism to solve the structure of DM-admixed NSs (DANSs) and the surrounding spacetime. Specifically, we pay attention to the situation where those DANSs possess DM halos. Due to the gravitational effect of the DM halo, the pulse profile of an X-ray pulsar is changed. Our study finds a universal relation between the peak flux deviation of the pulse profile and $M_{\rm halo}/R_{\rm BM}$, which is the ratio of the DM halo mass, $M_{\rm halo}$, to the baryonic matter (BM) core radius, $R_{\rm BM}$. Our results show that, when $M_{\rm halo}/R_{\rm BM}=0.292$ and the DM particle mass $m_f = 0.3\,$GeV, the maximum deviation of the profile can be larger than 100$\%$, which has implication in X-ray pulsar observation.
description: 10 pages, 11 figures; accepted by PRD
Edge state on hydrogen-terminated graphite edges investigated by scanning tunneling microscopy
Creators: name: Kobayashi, Yousuke
name: Fukui, Ken-ichi
name: Enoki, Toshiaki
name: Kusakabe, Koichi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The edge states that emerge at hydrogen-terminated zigzag edges embedded in dominant armchair edges of graphite are carefully investigated by ultrahigh-vacuum scanning tunneling microscopy (STM) measurements. The edge states at the zigzag edges have different spatial distributions dependent on the $α$- or $β$-site edge carbon atoms. In the case that the defects consist of a short zigzag (or a short Klein) edge, the edge state is present also near the defects. The amplitude of the edge state distributing around the defects in an armchair edge often has a prominent hump in a direction determined by detailed local atomic structure of the edge. The tight binding calculation based on the atomic arrangements observed by STM reproduces the observed spatial distributions of the local density of states.
description: 9 pages, 11 figures, accepted for Physical Review B
Coupling Metric-Affine Gravity to the Standard Model and Dark Matter Fermions
Creators: name: Rigouzzo, Claire
name: Zell, Sebastian
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: General Relativity (GR) exists in different formulations, which are equivalent in pure gravity. Once matter is included, however, observable predictions generically depend on the version of GR. In order to quantify the resulting ambiguity, we employ metric-affine gravity, which encompasses as special cases the metric, Palatini, Einstein-Cartan and Weyl formulations. We first discuss the interaction of fermions with torsion and non-metricity, also commenting on projective symmetry. With a view towards the Standard Model, we then construct a generic model of (complex) scalar, fermionic and gauge fields coupled to GR and derive an equivalent metric theory, which features numerous new interaction terms. As a first observable consequence, we point out that a gravitational mechanism for producing dark matter in the form of singlet fermions can be used to distinguish between metric gravity and other formulations of GR.
description: 54 pages, 3 appendices; v2: small improvements and moved some material from main part to appendices, matches published version (up to references)
A Versatile Framework for Attributed Network Clustering via K-Nearest Neighbor Augmentation
Creators: name: Li, Yiran
name: Guo, Gongyao
name: Shi, Jieming
name: Yang, Renchi
name: Shen, Shiqi
name: Li, Qing
name: Luo, Jun
Publisher: name: arXiv
Year: 2024
Subjects: subject: Social and Information Networks (cs.SI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Attributed networks containing entity-specific information in node attributes are ubiquitous in modeling social networks, e-commerce, bioinformatics, etc. Their inherent network topology ranges from simple graphs to hypergraphs with high-order interactions and multiplex graphs with separate layers. An important graph mining task is node clustering, aiming to partition the nodes of an attributed network into k disjoint clusters such that intra-cluster nodes are closely connected and share similar attributes, while inter-cluster nodes are far apart and dissimilar. It is highly challenging to capture multi-hop connections via nodes or attributes for effective clustering on multiple types of attributed networks. In this paper, we first present AHCKA as an efficient approach to attributed hypergraph clustering (AHC). AHCKA includes a carefully-crafted K-nearest neighbor augmentation strategy for the optimized exploitation of attribute information on hypergraphs, a joint hypergraph random walk model to devise an effective AHC objective, and an efficient solver with speedup techniques for the objective optimization. The proposed techniques are extensible to various types of attributed networks, and thus, we develop ANCKA as a versatile attributed network clustering framework, capable of attributed graph clustering (AGC), attributed multiplex graph clustering (AMGC), and AHC. Moreover, we devise ANCKA with algorithmic designs tailored for GPU acceleration to boost efficiency. We have conducted extensive experiments to compare our methods with 19 competitors on 8 attributed hypergraphs, 16 competitors on 6 attributed graphs, and 16 competitors on 3 attributed multiplex graphs, all demonstrating the superb clustering quality and efficiency of our methods.
description: 25 pages, 15 figures
Development of ATLAS Liquid Argon Calorimeter Front-end Electronics for the HL-LHC
Creators: name: Liu, Tiankuan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The high-luminosity phase of the Large Hadron Collider will provide 5-7 times greater luminosities than assumed in the original detector design. An improved trigger system requires an upgrade of the readout electronics of the ATLAS Liquid Argon Calorimeter. Concepts for the future readout of the 182,500 calorimeter cells at 40-80 MHz and 16-bit dynamic range and the developments of radiation-tolerant, low-noise, low-power, and high-bandwidth front-end electronic components, including preamplifiers and shapers, 14-bit ADCs, and 10-Gb/s laser diode array drivers, are presented in this paper.
description: 8 pages,10 figures
Energy-critical NLS with quadratic potentials
Creators: name: Killip, Rowan
name: Visan, Monica
name: Zhang, Xiaoyi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics

description: We consider the defocusing $\dot H^1$-critical nonlinear Schrödinger equation in all dimensions ($n\geq 3$) with a quadratic potential $V(x)=\pm \tfrac12 |x|^2$. We show global well-posedness for radial initial data obeying $\nabla u_0(x), xu_0(x) \in L^2$. In view of the potential $V$, this is the natural energy space. In the repulsive case, we also prove scattering. We follow the approach pioneered by Bourgain and Tao in the case of no potential; indeed, we include a proof of their results that incorporates a couple of simplifications discovered while treating the problem with quadratic potential.
description: Incorporates corrections to Lemma 6.5
The problem of exotic states: view from complex angular momenta
Creators: name: Azimov, Ya. I.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Having in mind present uncertainty of the experimental situation in respect to exotic hadrons, it is important to discuss any possible theoretical arguments, pro and contra. Up to now, there are no theoretical ideas which could forbid existence of the exotic states. Theoretical proofs for their existence are also absent. However, there are some indirect arguments for the latter case. It will be shown here, by using the complex angular momenta approach, that the standard assumptions of analyticity and unitarity for hadronic amplitudes lead to a non-trivial conclusion: the S-matrix has infinitely many poles in the energy plane (accounting for all its Riemann sheets). This is true for any arbitrary quantum numbers of the poles, exotic or non-exotic. Whether some of the poles may provide physical (stable or resonance) states, should be determined by some more detailed dynamics.
description: 6 pages, Latex; based on talks at HSQCD2005 (St.Petersburg, Russia, September 20 - 24, 2005), NSTAR2005 (Tallahassee, FA, USA, October 12 - 15. 2005), Scientific session of the Nuclear Physics Section of RAS (Moscow, Russia, December 5 - 9, 2005)
Lexical elicitation: Domestic sphere and animal parts
Creators: name: Ramirez, Angela
name: Mayel, Milad
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2023
Subjects: subject: mvj

description: Elicitation of lexical items regarding animal body parts (simple nouns) as well as the home and family (light emphasis on gender and possessive markings). Recordings are split accordingly, by topic.
DMRG study of exciton condensation in the extended Falicov-Kimball model
Creators: name: Farkašovský, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The formation and condensation of excitonic bound states of conduction-band electrons and valence-band holes surely belongs to one of the most exciting ideas of contemporary solid state physics. In this short review we present the latest progress in this field reached by the density-matrix-renormalization-group (DMRG) calculations within various extensions of the Falicov-Kimball model. Particular attention is paid to a description of crucial mechanisms (interactions) that affect the stability of the excitonic phase, and namely: (i) the interband $d$-$f$ Coulomb interaction, (ii) the $f$-electron hopping, (iii) the nonlocal hybridization with odd and even parity, (iv) combined effects of the local and nonlocal hybridization, (v) the nearest-neighbor Coulomb interaction between $d$ and $f$ electrons and (vi) the correlated hopping. The relevance of numerical results obtained within different extensions of the Falicov-Kimball model for a description of the real $d$-$f$ materials is widely discussed.
description: 11 pages, 8 figures. arXiv admin note: text overlap with arXiv:1702.04167, arXiv:1703.10911, arXiv:1907.08134