cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Reducing and Exploiting Data Augmentation Noise through Meta Reweighting Contrastive Learning for Text Classification
Creators: name: Mou, Guanyi
name: Li, Yichuan
name: Lee, Kyumin
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Data augmentation has shown its effectiveness in resolving the data-hungry problem and improving model's generalization ability. However, the quality of augmented data can be varied, especially compared with the raw/original data. To boost deep learning models' performance given augmented data/samples in text classification tasks, we propose a novel framework, which leverages both meta learning and contrastive learning techniques as parts of our design for reweighting the augmented samples and refining their feature representations based on their quality. As part of the framework, we propose novel weight-dependent enqueue and dequeue algorithms to utilize augmented samples' weight/quality information effectively. Through experiments, we show that our framework can reasonably cooperate with existing deep learning models (e.g., RoBERTa-base and Text-CNN) and augmentation techniques (e.g., Wordnet and Easydata) for specific supervised learning tasks. Experiment results show that our framework achieves an average of 1.6%, up to 4.3% absolute improvement on Text-CNN encoders and an average of 1.4%, up to 4.4% absolute improvement on RoBERTa-base encoders on seven GLUE benchmark datasets compared with the best baseline. We present an indepth analysis of our framework design, revealing the non-trivial contributions of our network components. Our code is publicly available for better reproducibility.
description: IEEE BigData 2021
Editoriale
Creators: name: Costanzo, Giovanna
name: Ricci Sindoni, Paola
Publisher: name: Università degli Studi di Cagliari
Year: 2020

description: Quel movimento del pendolo con cui è stato rappresentato il nostro tempo, (Heller 1990) e che si muove o in avanti negando “ciò che è stato” o torna indietro nostalgico verso il passato, e quindi, desideroso di recuperare ciò che è stato infranto, sembra perpetuarsi nell’animo dei più sensibili quando stremati dall’inesausta e incessante lotta fra ciò che è caduco e ciò che resta, si rifugiano nel regno “alta cultura” (Heller 1999) per trovare una dimora stabile in cui ripararsi dall’incertezza di queste continue oscillazioni (Costanzo 2007). Si sentono al riparo perché avvertono la familiarità e l’affinità...
description: Critical Hermeneutics, 2020: Ágnes Heller (1929 - 2019) In memoriam The Utopia of Conversation
Improving the Shortest Plank: Vulnerability-Aware Adversarial Training for Robust Recommender System
Creators: name: Zhang, Kaike
name: Cao, Qi
name: Wu, Yunfan
name: Sun, Fei
name: Shen, Huawei
name: Cheng, Xueqi
Publisher: name: arXiv
Year: 2024
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Recommender systems play a pivotal role in mitigating information overload in various fields. Nonetheless, the inherent openness of these systems introduces vulnerabilities, allowing attackers to insert fake users into the system's training data to skew the exposure of certain items, known as poisoning attacks. Adversarial training has emerged as a notable defense mechanism against such poisoning attacks within recommender systems. Existing adversarial training methods apply perturbations of the same magnitude across all users to enhance system robustness against attacks. Yet, in reality, we find that attacks often affect only a subset of users who are vulnerable. These perturbations of indiscriminate magnitude make it difficult to balance effective protection for vulnerable users without degrading recommendation quality for those who are not affected. To address this issue, our research delves into understanding user vulnerability. Considering that poisoning attacks pollute the training data, we note that the higher degree to which a recommender system fits users' training data correlates with an increased likelihood of users incorporating attack information, indicating their vulnerability. Leveraging these insights, we introduce the Vulnerability-aware Adversarial Training (VAT), designed to defend against poisoning attacks in recommender systems. VAT employs a novel vulnerability-aware function to estimate users' vulnerability based on the degree to which the system fits them. Guided by this estimation, VAT applies perturbations of adaptive magnitude to each user, not only reducing the success ratio of attacks but also preserving, and potentially enhancing, the quality of recommendations. Comprehensive experiments confirm VAT's superior defensive capabilities across different recommendation models and against various types of attacks.
Unitarity of the tree approximation to the Glauber AA amplitude for large A
Creators: name: Braun, M. A.
name: Krylov, A. V.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The nucleus-nucleus Glauber amplitude in the tree approximation is studied for heavy participant nuclei. It is shown that, contrary to previous published results, it is not unitary for realistic values of nucleon-nucleon cross-sections.
description: 15 pages, 1 figure, 1 table. Submitted to Yad. Fiz
Charles Baudelaire et la pensee litteraire d'Edgar Allan Poe
Creators: name: Plant, John Frederick
Publisher: name: University of British Columbia
Year: 2011

description: The purpose of this thesis is to consider the extent to which Edgar Allan Poe’s literary thought influenced Charles Baudelaire, Chapter one will explain when and how Baudelaire became acquainted with the works of the American writer. It will be seen that from his first readings of Poe, the Frenchman was profoundly moved; he felt that he had discovered a “frère spiritual." Baudelaire devoted almost seventeen years to the task of finding out all he could about Poe, writing articles about him and translating many of his works, the latter resulting in what is often considered to be one of the finest translations in literature. In chapter two it will be noted that there were many biographical affinities between the two writers, but that Baudelaire, in his articles on Poe, often emphasized the similarities and alluded only briefly to some of the basic differences. This can be explained by the fact that the French poet was determined that he and Poe should resemble each other. However, if the biographical similarities are often exaggerated by Baudelaire, the esthetic and artistic affinities offer a far more solid basis for comparison. Indeed, as chapter three will attempt to show, both poets shared many of the same precepts governing poetry, such as the ideal length of a poem, the role of music in verse, and the primordial importance of poetry in the life of man. Early critics tended to attribute these similarities to Poe's influence on Baudelaire. Nowadays, however, scholars tend more to ascribe this somewhat unique literary phenomenon to common influences working independently on the two poets. The general consensus is that Baudelaire's esthetic and artistic outlook was almost completely formed before he became acquainted with Poe's works. A chronological examination of some of the Frenchman's poems would appear to corroborate this theory. On the other hand, there are a number of poems which Baudelaire dedicated to a certain Madame Sabatier, in which may be seen ideas, images and even complete phrases which resemble Poe to such a degree that one is all but forced to conclude that they must result from Baudelaire's familiarity with the American's works. Chapter four discusses some of5ssthe more outstanding similarities which occur in this group, known as the "cycle de Madame Sabatier." In conclusion, it may be said that, with the exception of the Sabatier poems, Poe did not transform Baudelaire's fundamental literary outlook and added nothing to his genius. On the other hand, and of the utmost importance in a man of Baudelaire's somewhat unstable make-up, the Frenchman saw in his idol a kind of vindication of his own ideals and derived from him a certain faith in the value of his own genius. Approved as abstract:
Comment on "Nonmagnetic Impurity Resonances as a Signature of Sign-Reversal Pairing in Fe-As-Based Superconductors"
Creators: name: Daghofer, Maria
name: Moreo, Adriana
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In a recent Letter [PRL 103, 186402 (2009)], the energy band structure of Fe-As-based superconductors is fitted with a tight-binding model with two Fe ions per unit cell and two degenerate xz and yz orbitals per Fe ion. The author claims that the proposed model, which differs markedly from a model previously used by other authors for the same two orbitals in the same compounds, possesses the symmetry required to describe the Fe-As planes in iron-pnictide superconductors. In this comment we argue that this is not the case.
description: Comment on PRL 103, 186402 (2009)
The role of f -electrons in the Fermi surface of the heavy fermion superconductor beta-YbAlB4
Creators: name: O'Farrell, E. C. T.
name: Tompsett, D. A.
name: Sebastian, S. E.
name: Harrison, N.
name: Capan, C.
name: Balicas, L.
name: Kuga, K.
name: Matsuo, T.
name: Tokunaga, M.
name: Nakatsuji, S.
name: Csanyi, G.
name: Fisk, Z.
name: Sutherland, M. L.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present a detailed quantum oscillation study of the Fermi surface of the recently discovered Yb-based heavy fermion superconductor beta-YbAlB4 . We compare the data, obtained at fields from 10 to 45 Tesla, to band structure calculations performed using the local density approximation. Analysis of the data suggests that f-holes participate in the Fermi surface up to the highest magnetic fields studied. We comment on the significance of these findings for the unconventional superconducting properties of this material.
Instabilities of Twisted Strings
Creators: name: Forgacs, Peter
name: Lukacs, Arpad
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A linear stability analysis of twisted flux-tubes (strings) in an SU(2) semilocal theory -- an Abelian-Higgs model with two charged scalar fields with a global SU(2) symmetry -- is carried out. Here the twist refers to a relative phase between the two complex scalars (with linear dependence on, say, the $z$ coordinate), and importantly it leads to a global current flowing along the the string. Such twisted strings bifurcate with the Abrikosov-Nielsen-Olesen (ANO) solution embedded in the semilocal theory. Our numerical investigations of the small fluctuation spectrum confirm previous results that twisted strings exhibit instabilities whose amplitudes grow exponentially in time. More precisely twisted strings with a single magnetic flux quantum admit a continuous family of unstable eigenmodes with harmonic $z$ dependence, indexed by a wavenumber $k\in[-k_{\rm m},k_{\rm m}]$. Carrying out a perturbative semi-analytic analysis of the bifurcation, it is found that the purely numerical results are very well reproduced. This way one obtains not only a good qualitative description of the twisted solutions themselves as well as of their instabilities, but also a quantitative description of the numerical results. Our semi-analytic results indicate that in close analogy to the known instability of the embedded ANO vortex a twisted string is also likely to expand in size caused by the spreading out of its magnetic flux.
description: 27 pages, 18 figures. Typos corrected, references added
Particle simulations in causal set theory
Creators: name: Philpott, Lydia
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Models of particle propagation in causal set theory are investigated through simulations. For the swerves model the simulations are shown to agree with the expected continuum diffusion behaviour. Given the limitations on the simulated causal set size, the agreement is far better than anticipated.
description: 8 pages, 3 figures
Commensurate Antiferromagnetism in CePt2In7, a Nearly Two-Dimensional Heavy Fermion System
Creators: name: apRoberts-Warren, N.
name: Dioguardi, A. P.
name: Shockley, A. C.
name: Lin, C. H.
name: Crocker, J.
name: Klavins, P.
name: Curro, N. J.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: CePt$_2$In$_7$ is a new heavy fermion system with a structure similar to the CeMIn$_5$ system but with greater two-dimensional character. We report the synthesis and characterization of phase pure polycrystalline material, which reveals an antiferromagnetic transition at $T_N = 5.2$ K. Nuclear Quadrupolar Resonance (NQR) studies indicate that the antiferromagnetism is commensurate and exhibits strong antiferromagnetic fluctuations in the paramagnetic state.
description: 4 pages, 4 figures
Magnetic order in CaFe1-xCoxAsF (x = 0, 0.06, 0.12) superconductor compounds
Creators: name: Xiao, Y.
name: Su, Y.
name: Mittal, R.
name: Chatterji, T.
name: Hansen, T.
name: Kumar, C. M. N.
name: Matsuishi, S.
name: Hosono, H.
name: Brueckel, Th.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A Neutron Powder Diffraction (NPD) experiment has been performed to investigate the structural phase transition and magnetic order in CaFe1-xCoxAsF superconductor compounds (x = 0, 0.06, 0.12). The parent compound CaFeAsF undergoes a tetragonal to orthorhombic phase transition at 134(3) K, while the magnetic order in form of a spin-density wave (SDW) sets in at 114(3) K. The antiferromagnetic structure of the parent compound has been determined with a unique propagation vector k = (1,0,1) and the Fe saturation moment of 0.49(5)uB aligned along the long a-axis. With increasing Co doping, the long range antiferromagnetic order has been observed to coexist with superconductivity in the orthorhombic phase of the underdoped CaFe0.94Co0.06AsF with a reduced Fe moment (0.15(5)uB). Magnetic order is completely suppressed in optimally doped CaFe0.88Co0.12AsF. We argue that the coexistence of SDW and superconductivity might be related to mesoscopic phase separation.
description: 4pages, 4figures
Probing CP Violation with and without Momentum Reconstruction at the LHC
Creators: name: Moortgat-Pick, G.
name: Rolbiecki, K.
name: Tattersall, J.
name: Wienemann, P.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the potential to observe CP-violating effects in SUSY cascade decay chains at the LHC. We consider squark and gluino production followed by subsequent decays into neutralinos with a three-body leptonic decay in the final step. Asymmetries composed by triple products of momenta of the final state particles are sensitive to CP-violating effects. Due to large boosts these asymmetries can be difficult to observe at a hadron collider. We show that using all available kinematic information one can reconstruct the decay chains on an event-by-event basis even in the case of 3-body decays, neutrinos and LSPs in the final state. We also discuss the most important experimental effects like major backgrounds and momentum smearing due to finite detector resolution. We show that with 300 fb$^{-1}$ of collected data, CP violation may be discovered at the LHC for a wide range of the phase of the bino mass parameter $M_1$.
description: Version accepted for publication in JHEP. Clarifications added on the assumptions used for plots. New references added
Similarity between the Molecular Loops in the Galactic Center and the Solar Chromospheric Arch Filaments
Creators: name: Takahashi, Kunio
name: Nozawa, Satoshi
name: Matsumoto, Ryoji
name: Machida, Mami
name: Fukui, Yasuo
name: Kudo, Natsuko
name: Torii, Kazufumi
name: Yamamoto, Hiroaki
name: Fujishita, Motosuji
Publisher: name: arXiv
Year: 2009
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We carried out two-dimensional magnetohydrodynamic simulations of the Galactic gas disk to show that the dense loop-like structures discovered by the Galactic center molecular cloud survey by NANTEN 4 m telescope can be formed by the buoyant rise of magnetic loops due to the Parker instability. At the initial state, we assumed a gravitationally stratified disk consisting of the cool layer ($T \sim 10^3$ K), warm layer ($T \sim 10^4$ K), and hot layer ($T \sim 10^5$ K). Simulation box is a local part of the disk containing the equatorial plane. The gravitational field is approximated by that of a point mass at the galactic center. The self-gravity, and the effects of the galactic rotation are ignored. Numerical results indicate that the length of the magnetic loops emerging from the disk is determined by the scale height of the hot layer ($\sim$ 100 pc at 1 kpc from the Galactic center). The loop length, velocity gradient along the loops and large velocity dispersions at their foot points are consistent with the NANTEN observations. We also show that the loops become top-heavy when the curvature of the loop is sufficiently small, so that the rising loop accumulates the overlying gas faster than sliding it down along the loop. This mechanism is similar to that of the formation of solar chromospheric arch filaments. The molecular loops emerge from the low temperature layer just like the dark filaments observed in the H$α$ image of the emerging flux region of the sun.
description: 23 pages, 13 figures. Accepted for publication in PASJ
Ramond-Ramond field strength couplings on D-branes
Creators: name: Garousi, Mohammad R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: By examining in details the disk level S-matrix element of one massless RR and one NSNS states at order O(α'^2), we find the coupling of one RR and one NSNS fields on the world volume of a D$_p$-brane. The non-zero couplings involve the first derivative of the RR field strengths F^{(p)}, F^{(p+2)} and F^{(p+4)}. We then fix the on-shell ambiguity of the couplings by requiring consistency with the linear T-duality transformations. Moreover, consistency with the non-linear T-duality requires that the RR field strength in the above couplings to be {\cal F}=d{\cal C} where {\cal C}=e^{B}C.
description: Latex file, 20 pages;v2: references added
Coherent and random UHECR Spectroscopy of Lightest Nuclei along CenA: Shadows on GZK Tau Neutrinos spread in a near sky and time
Creators: name: Fargion, D.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Earliest 2007 UHECR anisotropy findings and ICRC AUGER updated maps and clustering confirms our understanding of CenA as the main nearby UHECR source. Those events are mostly lightest nuclei, as He. The events are spread by galactic fields. We argue that the main UHECR event bending, along CenA, is spreading vertically (respect to horizontal spiral galactic fields) by random (and a final coherent) Lorentz force. The He-nuclei dominance is also well probed by detailed AUGER composition data. The Lightest nuclei are still compatible with most recent Hires composition results. Such lightest UHECR nuclei are fragile and opaque even to nearest Universe. Offering a very narrow local (ten Mpc) view. This opacity explain the otherwise puzzling Virgo persistent absence. The He photo-disruption in flight should lead to halves energy tail clustering (along the same CenA group), events made by deuterium, He3 and protons (or unstable neutrons). This tail anisotropy should be revaled. The consequent foreseen UHE neutrino by UHECR Lightest nuclei dissociation, at tens-a hundred PeV, may rise soon in AUGER and TA telescopes. Such neutrino signal are quite inclined upward fluorescent Tau air-showers at nearest (2 - 4 km) horizons, at middle-low telescope view zenith angles. Their air-showers will be opening and extending in widest azimuth angle and fastest angular velocity spread. Contrary to far EeV tau expected by popular GZK neutrinos. Even hard to observe these Tau Air-showers at tens and hundred PeVs may soon shine (in a peculiar way) at near telescope views and within a short (years) time, both in AUGER, HEAT and TA sky.
description: 5 pages, 12 figures, (2 new figures from the original and modified AUGER HEP09 talk presentation)
Star forming galaxies in the AKARI Deep Field South: identifications and SEDs
Creators: name: Malek, K.
name: Pollo, A.
name: Takeuchi, T. T.
name: Bienias, P.
name: Shirahata, M.
name: Matsuura, S.
name: Kawada, M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: To investigate the nature and properties of far-infrared (FIR) sources from the AKARI Deep Field South (ADF-S), we performed an extensive search for the counterparts of 1000 ADF-S objects brighter than 0.0301 Jy in the WIDE-S (90 $μ$m) AKARI band in the public databases (NED and SIMBAD). We analyzed the properties of the resulting sample: statistic of the identified objects, number counts, redshift distribution and morphological types. We also made a crude analysis of the clustering properties of the sources and constructed spectral energy distributions (SEDs) of 47 selected objects with the best photometry. Among 1000 investigated ADF-S sources, 545 were identified at other wavelengths. From them, 518 are known galaxies, and 343 of them were not known previously as infra-red sources. We found redshifts of 48 extragalactic objects and morphological types of 77 galaxies. We conclude that the bright FIR point sources observed in the ADF-S are mostly nearby galaxies.Their properties are very similar to properties of the local population of optically bright galaxies, except an unusually high ratio of peculiar or interacting objects and a smaller percentage of elliptical galaxies. The percentage of lenticular galaxies is the same as in the optically bright population which suggests they may frequently contain a significant amount of cool dust. It is possible that source confusion plays a significant role in more than 34% of measurements. The SEDs display a variety of galaxy types, from very actively star forming to very quiescent. Thanks to the AKARI long wavelength bands it was revealed for the first time that these galaxies form a population of objects with very cool dust.
description: 78 pages, "Astronomy & Astrophysics", accepted, to appear in the AKARI special issue
Heterogeneous Hyper-Graph Neural Networks for Context-aware Human Activity Recognition
Creators: name: Ge, Wen
name: Mou, Guanyi
name: Agu, Emmanuel O.
name: Lee, Kyumin
Publisher: name: arXiv
Year: 2024
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Context-aware Human Activity Recognition (CHAR) is challenging due to the need to recognize the user's current activity from signals that vary significantly with contextual factors such as phone placements and the varied styles with which different users perform the same activity. In this paper, we argue that context-aware activity visit patterns in realistic in-the-wild data can equivocally be considered as a general graph representation learning task. We posit that exploiting underlying graphical patterns in CHAR data can improve CHAR task performance and representation learning. Building on the intuition that certain activities are frequently performed with the phone placed in certain positions, we focus on the context-aware human activity problem of recognizing the tuple. We demonstrate that CHAR data has an underlying graph structure that can be viewed as a heterogenous hypergraph that has multiple types of nodes and hyperedges (an edge connecting more than two nodes). Subsequently, learning representations becomes a graph node representation learning problem. After task transformation, we further propose a novel Heterogeneous HyperGraph Neural Network architecture for Context-aware Human Activity Recognition (HHGNN-CHAR), with three types of heterogeneous nodes (user, phone placement, and activity). Connections between all types of nodes are represented by hyperedges. Rigorous evaluation demonstrated that on an unscripted, in-the-wild CHAR dataset, our proposed framework significantly outperforms state-of-the-art (SOTA) baselines including CHAR models that do not exploit graphs, and GNN variants that do not incorporate heterogeneous nodes or hyperedges with overall improvements 14.04% on Matthews Correlation Coefficient (MCC) and 7.01% on Macro F1 scores.
description: PerCom 2023
On complete degenerations of surfaces with ordinary singularities in $\mathbb P^3$
Creators: name: Kulikov, V. S.
name: Kulikov, Vik. S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14D06

description: We investigate the problem of existence of degenerations of surfaces in $\mathbb P^3$ with ordinary singularities into plane arrangements in general position.
The role of donors in Papua New Guinea's development
Creators: name: Thomas, Margaret
Publisher: name: Canberra, ACT: Coral Bell School of Asia Pacific Affairs, College of Asia and the Pacific, The Australian National University
Year: 2006

description: In this paper I will be focusing on the development partnership that exists between Papua New Guinea and Australia. Australia, which makes the single largest donor contribution to Papua New Guinea’s development, takes its role as major donor very seriously, with all the implications that has for our duty to coordinate closely with the Papua New Guinea government and other development partners, and to maintain a well-informed, comprehensive and robust dialogue with Papua New Guinea on development challenges and policy directions.
Effect of confinement potential geometry on entanglement in quantum dot-based nanostructures
Creators: name: Abdullah, S.
name: Coe, J. P.
name: D'Amico, I.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We calculate the spatial entanglement between two electrons trapped in a nanostructure for a broad class of confinement potentials, including single and double quantum dots, and core-shell quantum dot structures. By using a parametrized confinement potential, we are able to switch from one structure to the others with continuity and to analyze how the entanglement is influenced by the changes in the confinement geometry. We calculate the many-body wave function by `exact' diagonalization of the time independent Schrödinger equation. We discuss the relationship between the entanglement and specific cuts of the wave function, and show that the wave function at a single highly symmetric point could be a good indicator for the entanglement content of the system. We analyze the counterintuitive relationship between spatial entanglement and Coulomb interaction, which connects maxima (minima) of the first to minima (maxima) of the latter. We introduce a potential quantum phase transition which relates quantum states characterized by different spatial topology. Finally we show that by varying shape, range and strength of the confinement potential, it is possible to induce strong and rapid variations of the entanglement between the two electrons. This property may be used to tailor nanostructures according to the level of entanglement required by a specific application.
description: 10 pages, 8 figures and 1 table
Metaphysical Perspectives
Creators: name: Rescher, Nicholas
Publisher: name: University of Notre Dame
Year: 2023

description: In _Metaphysical Perspectives_, Nicholas Rescher offers a grand vision of how to conceptualize, and in some cases answer, some of the most fundamental issues in metaphysics and value theory. Rescher addresses what he sees as the three prime areas of metaphysical concern: (1) the world as such and the architecture of nature at large, (2) ourselves as nature's denizens and our potential for learning about it, and (3) the transcendent domain of possibility and value. Rescher engages issues across a wide range of metaphysical themes, from different worldviews and ultimate questions to contingency and necessity, intelligent design and world-improvability, personhood and consciousness, empathy and other minds, moral obligation, and philosophical methodology. Over the course of this book, Rescher discusses, with his characteristic fusion of idealism and pragmatism, an integrated overview of the key philosophical problems grounded in an idealistically value-oriented approach. His discussion seeks to shed new light on philosophically central issues from a unified point of view.
The thematic unity of Wycherley's plays
Creators: name: Shaw, Patricia Nan
Publisher: name: University of British Columbia
Year: 2011

description: This thesis is an attempt to arrive at an understanding of Wycherley's vision and portrayal of human nature through an analysis of the principal themes contained in each of his four plays. The primary theme is the distinction between appearance and reality in human nature. The implications of this theme are explored as they operate through certain subsidiary themes: love, marriage, friendship, honour, affectation, plain-dealing, and jealousy. In examining each of these themes, a pattern emerges within each play whereby men reveal that they are fundamentally hypocritical creatures, motivated by selfish desires. They strive to satisfy these desires by manipulating and exploiting their fellow men. Initially, however, they conceal their inner natures by maintaining a superficial appearance of decorum and respectability. As each play progresses, Wycherley penetrates the outer appearance of each character to reveal his true nature, a nature which is essentially evil. He strengthens this impression by the creation within each play of either an individual or place through which the sordidness of human nature appears completely stripped of any veneer of civilized behaviour. Within each play also, there is an individual or couple whose virtuous example further stresses the corruption of the other characters. Nevertheless, while the same pattern emerges within each play, there are differences in tone, emphasis, characterization, plot, and complexity which reflect Wycherley's developing ability as a dramatist. His first play, Love in a Wood is a typical comedy in which the love chase predominates, but in which Wycherley demonstrates his belief in man's innate depravity. His second play, The Gentleman Dancing-Master is a farce in which Wycherley examines affectations and vanities of a topical nature. With his third play, The Country-Wife, the satirical tone darkens and intensifies. In his final play, The Plain-Dealer, Wycherley broadens the scope of the play to create a sense of an all-pervasive corruption, existing on every level of society. In these last two plays, Wycherley further emphasizes his belief in man's depravity by the use of imagery. Images of disease, food, drink, gambling, and animals serve to strengthen the impression that man is a brutish creature. While Wycherley portrays human nature with greater complexity and subtlety in his last two plays, his focus and conclusion remain essentially unchanged. It is this fact which gives unity and coherence to his drama, and which demonstrates Wycherley1s developing skill as an artist. This skill, combined with the intensity of his vision of human nature, gives his plays a brilliance and impact which is generally overlooked or underestimated.
A 12.5 GHz-Spaced Optical Frequency Comb Spanning >400 nm for near-Infrared Astronomical Spectrograph Calibration
Creators: name: Quinlan, F.
name: Ycas, G.
name: Osterman, S.
name: Diddams, S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: A 12.5 GHz-spaced optical frequency comb locked to a Global Positioning disciplined oscillator for near-IR spectrograph calibration is presented. The comb is generated via filtering a 250 MHz-spaced comb. Subsequency nonlinear broadening of the 12.5 GHz comb extends the wavelength range to cover 1380 nm to 1820 nm, providing complete coverage over the H-band transmission widow of Earth's atmosphere. Finite suppression of spurious sidemodes, optical linewidth and instability of the comb have been examined to estmiate potential wavelength biases in spectrograph calibration. Sidemode suppression varies between 20 db and 45 dB, and the optical linewidth is ~350 kHz at 1550 nm. The comb frequency uncertainty is bounded by +/- 30 kHz (corresponding to a radial velocity of +/- 5 cm/s), limited by the Global Positioning System disciplined oscillator reference. These results indicate this comb can readily support radial velocity measurements below 1 m/s in the near-IR.
description: 16 pages, 12 figures, new file fixes some readability problems on Macs
An algorithm for detection of extreme mass ratio inspirals in LISA data
Creators: name: Babak, Stanislav
name: Gair, Jonathan R.
name: Porter, Edward K.
Publisher: name: arXiv
Year: 2009
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The gravitational wave signal from a compact object spiralling toward a massive black hole (MBH) is thought to be one of the most difficult sources to detect in the LISA data stream. Due to the large parameter space of possible signals and many orbital cycles spent in the sensitivity band of LISA, it has been estimated previously that of the order of 10^{35} templates would be required for a fully coherent search with a template grid, which is computationally impossible. Here we describe an algorithm based on a constrained Metropolis-Hastings stochastic search which allows us to find and accurately estimate parameters of isolated EMRI signals buried in Gaussian instrumental noise. We illustrate the effectiveness of the algorithm with results from searches of the Mock LISA Data Challenge round 1B data sets.
description: 14 pages, 4 figures
Liliana Segre and Ruth Klüger: The Witness Between History and Memory
Creators: name: Ricci Sindoni, Paola
Publisher: name: Università degli Studi di Cagliari
Year: 2020

description: Deeply disturbed by the expression of a historian: «Historians must speak. Witnesses are the pathetic puppets of memory», Liliana Segre accepted this challenge, to further reflect on the meaning and limit of witnessing. Another survivor echoes her: Ruth Klüger, like her wrapped in the burden of memory, and continually urged to deal with a painful memory, yet continuously present.
description: Critical Hermeneutics, 2020: Ágnes Heller (1929 - 2019) In memoriam The Utopia of Conversation
Cover
Creators: name: H, C
Publisher: name: Università degli Studi di Cagliari
Year: 2020

description: A. Heller (1929 - 2019) In memoriam The Utopia of Conversationa
description: Critical Hermeneutics, 2020: Ágnes Heller (1929 - 2019) In memoriam The Utopia of Conversation
D5.4 Results of Concept UE Proofing Trials
Creators: name: Bechadergue, Bastien
name: Cosmas, John
name: Nawar Jawad,
name: Kareem Ali,
name: Hongying Meng
name: Jintao Wang
name: Koffman, Israel
name: Ran, Moshe
name: Eliron Salomon,
name: Sheffi, Gil
name: Avinoam, Yoav
name: Cömert, Furkan
name: Zhang, Xun
name: Yunyun, Pu
name: Müller, Robert
name: Zhang, Yue
Publisher: name: Zenodo
Year: 2021
Subjects: RRLH, VLC, 5G, mmWave, PHY, MAC, VRAN, DRAN

description: This document describes the initial results obtained by the IoRL researchers in the proof trial results of the user equipment (UE) design including the VLC and mmWave links.
 The results were obtained during the development, integration and initial testing of the different modules that are part of the RRLH UE including: mmWave Tx/Rx with 60GHz mmWave Tx/Rx with 40GHz VLC Tx with Oledcomm Rx at Viavi testbed VLC Tx with TH Rx at Viavi testbed VLC Tx with Oledcomm Rx at REL DRAN+RRLH testbed VLC Tx with TH Rx at REL DRAN+RRLH testbed
description: Suggested readers: IoRL project members
Editors' Introduction
Creators: name: Costanzo, Giovanna
name: Ricci Sindoni, Paola
Publisher: name: Università degli Studi di Cagliari
Year: 2020

description: That swing of the pendulum, with which our time was represented, (Heller 1990), and which either moves forwards denying "what has been" or nostalgically back to the past and therefore eager to recover what has been broken, seems to perpetuate itself in the most sensitive beings. When exhausted by the endless and incessant struggle between what is fleeting and what remains, they take refuge in the kingdom of "high culture" (Heller 1999) in order to find a stable home in which to shelter themselves from the uncertainty of these continuous oscillations (Costanzo 2007)...
description: Critical Hermeneutics, 2020: Ágnes Heller (1929 - 2019) In memoriam The Utopia of Conversation
Pressure Induced Static Magnetic Order in Superconducting FeSe_1-x
Creators: name: Bendele, M.
name: Amato, A.
name: Conder, K.
name: Elender, M.
name: Keller, H.
name: Klauss, H. -H.
name: Luetkens, H.
name: Pomjakushina, E.
name: Raselli, A.
name: Khasanov, R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report on a detailed investigation of the electronic phase diagram of FeSe_1-x under pressures up to 1.4GPa by means of AC magnetization and muon-spin rotation. At a pressure \simeq0.8GPa the non-magnetic and superconducting FeSe_1-x enters a region where long range static magnetic order is realized above T_c and bulk superconductivity coexists and competes on short length scales with the magnetic order below T_c. For even higher pressures an enhancement of both the magnetic and the superconducting transition temperatures as well as of the corresponding order parameters is observed. These exceptional properties make FeSe1-x to be one of the most interesting superconducting systems investigated extensively at present.
description: 5 pages, 3 figures
Monsoon Assemblages
Creators: name: Bremner, Lindsay
name: Cullen, Beth
name: Geros, Christina
name: Cook, John
name: Benson, Tom
Publisher: name: University of Westminster
Year: 2021
Subjects: monsoon assemblages
fieldwork
cartography
Chennai
Ladakh
Dhaka
Yangon
Bagan
Mandalay

description: The following data were collected for Monsoon Assemblages (MONASS), a research project funded by European Research Council Starting Grant, no. 679873 (2016-2021). They include fieldwork reports, fieldwork data logs and drawing logs. Fieldwork reports are each licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. The data logged in the fieldwork and drawing logs are available on request to Professor Lindsay Bremner at l.bremner@westminster.ac.uk
description: ethnography, observational site visits, photography, video, interviews
description: Cataloguing, anonymizing, logging, storing
KICHIK BIZNES VA XUSUSIY TADBIRKORLIKLARDA O'ZBEK TILINI RIVOJLANTIRISHNING BUGUNGI KUNDAGI DOLZARBLIGI
Creators: name: Yuldasheva, Dilnoza
name: Axmedov, Raxmatjon
name: Xalimov, Shuxrat
Publisher: name: Zenodo
Year: 2023

description: Ushbu ilmiy maqolada biz nima uchun kichik biznes va xususiy tadbirkorlikda tilni rivojlantirish bugungi jamiyatda hamon dolzarbligi va uning iqtisodiy barqarorlikni ta’minlash va shaxsning imkoniyatlarini kengaytirishda har doimgidek hayotiyligining sabablarini o‘rganamiz.
Lattice distortion in hcp rare gas solids
Creators: name: Grechnev, A.
name: Tretyak, S. M.
name: Freiman, Yu. A.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The lattice distortion parameter $δ\equiv c/a-\sqrt{8/3}$ has been calculated as a function of molar volume for the hcp phases of He, Ar, Kr and Xe. Results from both semi-empirical potentials and density functional theory are presented. Our study shows that $δ$ is negative for helium in the entire pressure range. For Ar, Kr and Xe, however, $δ$ changes sign from negative to positive as the pressure increases, growing rapidly in magnitude at higher pressures.
description: Submitted to Low. Temp. Phys., 14 pages, 5 figures
On the possibility of primary identification of individual cosmic ray showers
Creators: name: Supanitsky, A. D.
name: Medina-Tanco, G.
name: Etchegoyen, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The transition between the Galactic and extragalactic cosmic ray components could take place either in the region of the spectrum known as the second knee or in the ankle. There are several models of the transition but it is not possible to confirm or even rule out any of them from the flux measurement alone. Therefore, the measurement of the composition as a function of primary energy will play a fundamental role for the understanding of this phenomenon. In this work we study the possibility of primary identification in an event by event basis in the ankle region, around $E = 10^{18}$ eV. We consider as case study the enhancements of the Pierre Auger Southern Observatory, which are under construction in Malague, Province of Mendoza, Argentina. We use a non-parametric technique to estimate the density functions, from Monte Carlo data, corresponding to different combination of mass sensitive parameters and type of primaries. These estimates are used to obtain the classification probability of protons and iron nuclei for the different combination of parameters considered. We find that, after considering all relevant fluctuations, the maximum classification probability obtained combining surface and fluorescence detectors parameters is of order of 90%.
description: 29 pages and 10 figures
Clustering of K-band selected local galaxies
Creators: name: Ma, Bin
name: Meng, Kelai
name: Pan, Jun
name: Huang, Jiasheng
name: Feng, Longlong
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present detailed clustering analysis of a large K-band selected local galaxy sample, which is constructed from the 2MASS and the SDSS and consists of $82,486$ galaxies with $10 < K < 13.5$ and $0.01 < z < 0.1$. The two-point correlation function of the magnitude-limited sample in real space at small scales is well described by a power law $ξ(r)=(r/6.44\pm0.23)^{-1.81\pm0.02}$. The pairwise velocity dispersion is derived from the anisotropic two-point correlation function and find the dispersion $σ_{12}=685\pm 17\kms$ if its scale invariance is assumed, which is larger than values measured in optical bands selected galaxy samples. We further investigate the dependence of the two-point correlation function and the $σ_{12}$ on the $g-r$ color and the $K$-band luminosity, obtain similar results to previous works in optical bands. Comparing a mock galaxy sample with our real data indicates that the semi-analytical model can not mimic the $σ_{12}$ in observation albeit it can approximate the two-point correlation function within measurement uncertainties.
description: 13 pages, 6 figures, accepted by RAA
A Classical Background for the Wave Function Prediction in the Infinite System DMRG Method
Creators: name: Ueda, Hiroshi
name: Gendiar, Andrej
name: Nishino, Tomotoshi
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We report a physical background of the wave function prediction in the infinite system density matrix renormalization group (DMRG) method, from the view point of two-dimensional vertex model, a typical lattice model in statistical mechanics. Singular value decomposition applied to rectangular corner transfer matrices naturally draws matrix product representation for the maximal eigenvector of the row-to-row transfer matrix. The wave function prediction can be expressed as the insertion of an approximate half-column transfer matrix. This insertion process is in accordance with the scheme proposed by McCulloch recently.
description: 6 pages, 9 figures
HST/ACS H-alpha Imaging of the Carina Nebula: Outflow Activity Traced by Irradiated Herbig-Haro Jets
Creators: name: Smith, Nathan
name: Bally, John
name: Walborn, Nolan R.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the discovery of new Herbig-Haro (HH) jets in the Carina Nebula, and we discuss the protostellar outflow activity of a young OB association. These are the first results of an HST/ACS H-alpha imaging survey of Carina. Adding to the one previously known example (HH666), we detect 21 new HH jets, plus 17 new candidate jets, ranging in length from 0.005 to 3 pc. We derive jet mass-loss rates ranging from 8e-9 to 1e-6 Msun/yr, but a comparison to the distribution of jet mass-loss rates in Orion suggests that we may be missing a large fraction of the jets below 1e-8 Msun/yr. A key qualitative result is that even some of the smallest dark globules with sizes of 0.01pc are active sites of ongoing star formation because we see HH jets emerging from them, and that these offer potential analogs to the cradle of our Solar System because of their proximity to dozens of imminent supernovae that will enrich them with radioactive nuclides like 60Fe. HST images reveal proplyd structures in the core of the Tr14 cluster, only 0.1-0.2 pc from several O-type stars. Many examples of bent jets serve as "wind socks"; strong photoevaporative flows can shape the jets, competing with the direct winds and radiation from massive stars. Finally, even allowing for a large number of jets that may escape detection, we find that HH jets are negligible to the global turbulence of the surrounding region, which is driven by massive star feedback.
description: 37 journal pages, 34 figures, accepted by MNRAS