cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Gaseous nebulae and massive stars in the giant HI ring in Leo
Creators: name: Corbelli, Edvige
name: Mannucci, Filippo
name: Thilker, David
name: Cresci, Giovanni
name: Venturi, Giacomo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Chemical abundances in the Leo ring, the largest HI cloud in the local Universe, have recently been determined to be close or above solar, incompatible with a previously claimed primordial origin of the ring. The gas, pre-enriched in a galactic disk and tidally stripped, did not manage to form stars very efficiently in intergalactic space. We map nebular lines in 3 dense HI clumps of the Leo ring and complement these data with archival stellar continuum observations to investigate the slow building up of a sparse population of stars in localized areas of the ring. Individual young stars as massive as O7-types are powering some HII regions. The average star formation rate density is of order of 10^{-5} Msun/yr/kpc^2 and proceeds with local bursts a few hundred parsecs in size, where loose stellar associations of 500-1000 Msun occasionally host massive outliers. The far ultraviolet-to-Halpha emission ratio in nebular regions implies recent stellar bursts, from 2 to 7 Myr ago. The relation between the local HI gas density and the star formation rate in the ring is similar to what is found in dwarfs and outer disks with gas depletion times as long as 100~Gyrs. We find a candidate planetary nebula in a compact and faint Halpha region with [OIII]/Halpha line enhancement, consistent with the estimated mean stellar surface brightness of the ring. The presence of 1 kpc partial ring emitting weak Halpha lines around the brightest and youngest HII region suggests that local shocks might be the triggers of new star forming events.
description: 16 pages, 11 figure, accepted for publication in A&A
Stripe order enhanced superconductivity in the Hubbard model
Creators: name: Jiang, Hong-Chen
name: Kivelson, Steven A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Unidirectional ("stripe") charge-density-wave order has now been established as a ubiquitous feature in the phase diagram of the cuprate high temperature (HT) superconductors, where it generally competes with superconductivity (SC). None-the-less, on theoretical grounds it has been conjectured that stripe order (or other forms of "optimal" inhomogeneities) may play an essential positive role in the mechanism of HTSC. Here we report density matrix renormalization group studies of the Hubbard model on long 4 and 6 leg cylinders where the hopping matrix elements transverse to the long direction are periodically modulated - mimicing the effect of putative period-2 stripe order. We find even modest amplitude modulations can enhance the long-distance SC correlations by many orders of magnitude, and drive the system into a phase with a substantial spin gap and SC quasi-long-range-order with a Luttinger exponent, $K_{sc} \sim 1$.
description: 6+3 pages, 5+4 figures and 1+1 tables
A new doubly discrete analogue of smoke ring flow and the real time simulation of fluid flow
Creators: name: Pinkall, Ulrich
name: Springborn, Boris
name: Weissmann, Steffen
Publisher: name: arXiv
Year: 2007
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Dynamical Systems (math.DS)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Modelling incompressible ideal fluids as a finite collection of vortex filaments is important in physics (super-fluidity, models for the onset of turbulence) as well as for numerical algorithms used in computer graphics for the real time simulation of smoke. Here we introduce a time-discrete evolution equation for arbitrary closed polygons in 3-space that is a discretisation of the localised induction approximation of filament motion. This discretisation shares with its continuum limit the property that it is a completely integrable system. We apply this polygon evolution to a significant improvement of the numerical algorithms used in Computer Graphics.
description: 15 pages, 3 figures
Application of a new transient-noise analysis tool for an unmodeled gravitational-wave search pipeline
Creators: name: Mogushi, Kentaro
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Excess transient noise events, or glitches, impact the data quality of ground-based ravitational-wave (GW) detectors and impair the detection of signals produced by astrophysical sources. Identification of the causes of these glitches is a crucial starting point for the improvement of GW signal detectability. However, glitches are the product of linear and non-linear couplings among the interrelated detector-control systems that include mitigation of ground motion and regulation of optic motion, which generally makes it difficult to find their origin. We present a new software called PyChChoo which uses time series recorded in the instrumental control systems and environmental sensors around times when glitches are present in the detector's output to reveal essential clues about their origin. Applying PyChChoo on the most adversely affecting glitches on background triggers generated by one of unmodeled GW detection pipelines called coherent WaveBurst (cWB) operated in the data from the LIGO detectors between January 1st, 2020 and February 3rd, 2020, we find that 80% of triggers are marked as either being vetoed or unvetoed in common between our analysis and the current LIGO infrastructure.
description: 19 pages, 12 figures, 1 table
Two-photon decay of pseudoscalar quarkonia
Creators: name: Lansberg, J. P.
name: Pham, T. N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We report on our recent evaluation of the two-photon width of the pseudoscalar quarkonia, eta_c(nS) and eta_b(nS) in an approach based on Heavy-Quark Spin Symmetry (HQSS). To what concerns the 1S state eta_c, our parameter-free computation agrees with experiments, as well as most of other theoretical works. On the other hand, our computation for the 2S-state looks 2S like a confirmation that there may exist an anomaly related to the decay of eta_c(2S), especially in the light of the new preliminary result of the Belle collaboration. We also point out that the essentially model-independent ratio of eta_b two-photon width to the Upsilon leptonic width and the eta_b two-photon width could be used to extract the strong coupling constant alpha_s.
description: Presented by T.N. Pham at the Joint Meeting Heidelberg-Liege-Paris-Wroclaw (HLPW08), Spa, Belgium, 6-8 March 2008, 9 pages, 2 figures, LaTeX, uses aip-6s.clo, aipproc.cls and aipxfm.sty (included)
Tomonaga-Luttinger liquid parameters of magnetic waveguides in graphene
Creators: name: Häusler, W.
name: De Martino, A.
name: Ghosh, T. K.
name: Egger, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Electronic waveguides in graphene formed by counterpropagating snake states in suitable inhomogeneous magnetic fields are shown to constitute a realization of a Tomonaga-Luttinger liquid. Due to the spatial separation of the right- and left-moving snake states, this non-Fermi liquid state induced by electron-electron interactions is essentially unaffected by disorder. We calculate the interaction parameters accounting for the absence of Galilei invariance in this system, and thereby demonstrate that non-Fermi liquid effects are significant and tunable in realistic geometries.
description: 10 pages, 5 figures, published version
Enhanced Joule Heating in Umbral Dots
Creators: name: Joshi, Chandan
name: Bharti, Lokesh
name: Jaaffrey, S. N. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a study of magnetic profiles of umbral dots (UDs) and its consequences on the Joule heating mechanisms. Hamedivafa (2003) studied Joule heating using vertical component of magnetic field. In this paper UDs magnetic profile has been investigated including the new azimuthal component of magnetic field which might explain the relatively larger enhancement of Joule heating causing more brightness near circumference of UD.
description: 8 pages, 1 figure, accepted in Solar Physics
A smoothing model for sample disclosure risk estimation
Creators: name: Rinott, Yosef
name: Shlomo, Natalie
Publisher: name: arXiv
Year: 2007
Subjects: subject: Methodology (stat.ME)
subject: FOS: Computer and information sciences
subject: 62H17 (Primary) 62x07 (Secondary)

description: When a sample frequency table is published, disclosure risk arises when some individuals can be identified on the basis of their values in certain attributes in the table called key variables, and then their values in other attributes may be inferred, and their privacy is violated. On the basis of the sample to be released, and possibly some partial knowledge of the whole population, an agency which considers releasing the sample, has to estimate the disclosure risk. Risk arises from non-empty sample cells which represent small population cells and from population uniques in particular. Therefore risk estimation requires assessing how many of the relevant population cells are likely to be small. Various methods have been proposed for this task, and we present a method in which estimation of a population cell frequency is based on smoothing using a local neighborhood of this cell, that is, cells having similar or close values in all attributes. We provide some preliminary results and experiments with this method. Comparisons are made to two other methods: 1. a log-linear models approach in which inference on a given cell is based on a ``neighborhood'' of cells determined by the log-linear model. Such neighborhoods have one or some common attributes with the cell in question, but some other attributes may differ significantly. 2 The Argus method in which inference on a given cell is based only on the sample frequency in the specific cell, on the sample design and on some known marginal distributions of the population, without learning from any type of ``neighborhood'' of the given cell, nor from any model which uses the structure of the table.
description: Published at http://dx.doi.org/10.1214/074921707000000120 in the IMS Lecture Notes Monograph Series (http://www.imstat.org/publications/lecnotes.htm) by the Institute of Mathematical Statistics (http://www.imstat.org)
Products of Ordinary Differential Operators by Evaluation and Interpolation
Creators: name: Bostan, Alin
name: Chyzak, Frédéric
name: Roux, Nicolas Le
Publisher: name: arXiv
Year: 2008
Subjects: subject: Symbolic Computation (cs.SC)
subject: FOS: Computer and information sciences

description: It is known that multiplication of linear differential operators over ground fields of characteristic zero can be reduced to a constant number of matrix products. We give a new algorithm by evaluation and interpolation which is faster than the previously-known one by a constant factor, and prove that in characteristic zero, multiplication of differential operators and of matrices are computationally equivalent problems. In positive characteristic, we show that differential operators can be multiplied in nearly optimal time. Theoretical results are validated by intensive experiments.
Palatini gravity with nonmetricity, torsion, and boundaries in metric and connection variables
Creators: name: G., Fernando Barbero
name: Margalef-Bentabol, Juan
name: Varo, Valle
name: Villaseñor, Eduardo J. S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We prove the equivalence in the covariant phase space of the metric and connection formulations for Palatini gravity, with nonmetricity and torsion, on a spacetime manifold with boundary. To this end, we will rely on the cohomological approach provided by the relative bicomplex framework. Finally, we discuss some of the physical implications derived from this equivalence in the context of singularity identification through curvature invariants.
Face Attributes as Cues for Deep Face Recognition Understanding
Creators: name: Diniz, Matheus Alves
name: Schwartz, William Robson
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Deeply learned representations are the state-of-the-art descriptors for face recognition methods. These representations encode latent features that are difficult to explain, compromising the confidence and interpretability of their predictions. Most attempts to explain deep features are visualization techniques that are often open to interpretation. Instead of relying only on visualizations, we use the outputs of hidden layers to predict face attributes. The obtained performance is an indicator of how well the attribute is implicitly learned in that layer of the network. Using a variable selection technique, we also analyze how these semantic concepts are distributed inside each layer, establishing the precise location of relevant neurons for each attribute. According to our experiments, gender, eyeglasses and hat usage can be predicted with over 96% accuracy even when only a single neural output is used to predict each attribute. These performances are less than 3 percentage points lower than the ones achieved by deep supervised face attribute networks. In summary, our experiments show that, inside DCNNs optimized for face identification, there exists latent neurons encoding face attributes almost as accurately as DCNNs optimized for these attributes.
description: 7 pages, 5 figures, published at automatic face and gesture recognition 2020
Tests for the existence of horizon through gravitational waves from a small binary in the vicinity of a massive object
Creators: name: Fang, Yun
name: Guo, Rong-Zhen
name: Huang, Qing-Guo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
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: In this letter we calculate the gravitational waves (GWs) emitted from a small binary (SB) by solving the Teukolsky equation in the background of a massive exotic compact object (ECO) which is phenomenologically described by a Schwarzschild geometry with a reflective boundary condition at its "would-be" horizon. The "continuous echo" waves propagating to infinity due to reflectivity of ECO at its "would-be" horizon provide an exquisite probe to the nature of the ECO's horizon.
description: 6 pages, 3 figures; Detectability of the continuous echo added
Gęstość łupka miedziowego
Creators: name: Cependa, Kamila
name: Drzymała, Jan
name: Lewicka, Marta P.
Publisher: name: Faculty of Geoengineering, Mining and Geology, Wrocław University of Technology, Wrocław
Year: 2014
Subjects: Łupek, gęstość

description: Łupek miedzionośny, Drzymała J., Kowalczuk P.B. (red.), WGGG PWr, Wrocław, ISBN 978-83-937788-6-7
Enriching mean-field self-consistent texture simulations using the full-field FFT model
Creators: name: Kumar, Mirtunjay
name: Singh, Amit
name: Mishra, Sumeet
Publisher: name: Taylor & Francis
Year: 2021
Subjects: subject: Biophysics
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Evolutionary Biology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Ecology
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics

description: In the present work, crystal plasticity simulations using the fast Fourier transform (FFT) based Düsseldorf advanced material simulation kit (DAMASK) are performed to provide new insights on choosing the value of interaction parameter in the localisation equation of the visco-plastic self-consistent (VPSC) model. A statistical criterion based on the distribution of shear rates (γ˙s) at each material point is obtained using DAMASK, which enables the judicious selection of the interaction parameter in the VPSC model. Subsequent large-scale texture simulations via VPSC indicated an excellent match between experimental and simulated textures, which establishes the effectiveness of the proposed approach of learning from full-field models and using it in the mean-field, less computationally expensive VPSC model for performing efficient texture simulations.
Giving up the ghost
Creators: name: Bender, Carl M.
name: Mannheim, Philip D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Pais-Uhlenbeck model is a quantum theory described by a higher-derivative field equation. It has been believed for many years that this model possesses ghost states (quantum states of negative norm) and therefore that this model is a physically unacceptable quantum theory. The existence of such ghost states was believed to be attributable to the field equation having more than two derivatives. This paper shows that the Pais-Uhlenbeck model does not possess any ghost states at all and that it is a perfectly acceptable quantum theory. The supposed ghost states in this model arise if the Hamiltonian of the model is (incorrectly) treated as being Dirac Hermitian (invariant under combined matrix transposition and complex conjugation). However, the Hamiltonian is {\it not} Dirac Hermitian, but rather it is PT symmetric. When it is quantized correctly according to the rules of PT quantum mechanics, the energy spectrum is real and bounded below and all of the quantum states have positive norm.
description: 8 pages, o figures; talk given by the first author at the 5th International Symposium on Quantum Theory and Symmetries (QTS5) held in Vallodolid, Spain, July 2007; published in a special issue of the Journal of Physics A, Ed. by M. Gadella, J. M. Izquierdo, S. Kuru, J. Negro, M. del Olmo
A note on the U,V method of estimation
Creators: name: Cohen, Arthur
name: Sackrowitz, Harold
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62C15 (Primary) 62F15 (Secondary)

description: The U,V method of estimation provides unbiased estimators or predictors of random quantities. The method was introduced by Robbins \citer3 and subsequently studied in a series of papers by Robbins and Zhang. (See Zhang \citer5.) Practical applications of the method are featured in these papers. We demonstrate that for one U function (one for which there is an important application) the V estimator is inadmissible for a wide class of loss functions. For another important U function the V estimator is admissible for the squared error loss function.
description: Published at http://dx.doi.org/10.1214/074921707000000139 in the IMS Lecture Notes Monograph Series (http://www.imstat.org/publications/lecnotes.htm) by the Institute of Mathematical Statistics (http://www.imstat.org)
Relative entropy and the Bekenstein bound
Creators: name: Casini, H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Elaborating on a previous work by Marolf et al, we relate some exact results in quantum field theory and statistical mechanics to the Bekenstein universal bound on entropy. Specifically, we consider the relative entropy between the vacuum and another state, both reduced to a local region. We propose that, with the adequate interpretation, the positivity of the relative entropy in this case constitutes a well defined statement of the bound in flat space. We show that this version arises naturally from the original derivation of the bound from the generalized second law when quantum effects are taken into account. In this formulation the bound holds automatically, and in particular it does not suffer from the proliferation of the species problem. The results suggest that while the bound is relevant at the classical level, it does not introduce new physical constraints semiclassically.
description: 12 pages, 1 figure, minor changes and references added
An investigation of some aspects of cerium electrowinning
Creators: name: Thomas, Norman Bruce
Publisher: name: University of British Columbia
Year: 2010

description: Several aspects of the production of cerium by electrolytic reduction were investigated to determine more efficient operation. The solubility of cerium oxide in a molten fluoride salt bath(CeF₃, BaF₂, LiF) was determined by measuring the change in electrical conductivity of the bath as a function of added cerium oxide. The saturation solubility was found to be 2.9 wt% at 900 °C. The solubility was found to increase with temperature. Increasing the cerium fluoride content of the electrolyte also showed a small increase in the solubility. There was no difference found between the solubility of cerous oxide and eerie oxide. A heat balance model of a pilot plant scale cerium electrowinning cell was developed to improve cell design. The results of the model showed that most of the heat is lost through the anodes. The model showed that reducing the number of anodes and increasing their size would reduce heat losses, and thus improve cell operation. Increasing the-amount of insulation would reduce heat losses and make maintenance of the cell easier. It was also found that the production of lanthanum, praseodymium, and neodymium by electrolytic reduction of their respective oxides would be feasible.
Exotic rational elliptic surfaces without 1-handles
Creators: name: Yasui, Kouichi
Publisher: name: arXiv
Year: 2007
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57R55, 57R65, 57R57, 57N13

description: Harer, Kas and Kirby have conjectured that every handle decomposition of the elliptic surface $E(1)_{2,3}$ requires both 1- and 3-handles. In this article, we construct a smooth 4-manifold which has the same Seiberg-Witten invariant as $E(1)_{2,3}$ and admits neither 1- nor 3-handles, by using rational blow-downs and Kirby calculus. Our manifold gives the first example of either a counterexample to the Harer-Kas-Kirby conjecture or a homeomorphic but non-diffeomorphic pair of simply connected closed smooth 4-manifolds with the same non-vanishing Seiberg-Witten invariants.
description: 19 pages, 41 figures
Exploring Knowledge Leakage Risk in Knowledge-Intensive Organisations: Behavioural aspects and Key controls
Creators: name: Altukruni, Hibah
name: Maynard, Sean B.
name: Alshaikh, Moneer
name: Ahmad, Atif
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Knowledge leakage poses a critical risk to the competitive advantage of knowledge-intensive organisations. Although knowledge leakage is a human-centric security issue, little is known about leakage resulting from individual behaviour and the protective strategies and controls that could be effective in mitigating leakage risk. Therefore, this research explores the perspectives of security practitioners on the key factors that influence knowledge leakage risk in the context of knowledge-intensive organisations. We conduct two focus groups to explore these perspectives. The research highlights three types of behavioural controls that mitigate the risk of knowledge leakage: human resource management practices, knowledge security training and awareness practices, and compartmentalisation practices.
description: 11 pages
Low-power radio galaxy environments in the Subaru/XMM-Newton Deep Field at z~0.5
Creators: name: Geach, J. E.
name: Simpson, C.
name: Rawlings, S.
name: Read, A. M.
name: Watson, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present multi-object spectroscopy of galaxies in the immediate (Mpc-scale) environments of four low-power (L_1.4 GHz < 10^25 W/Hz) radio galaxies at z~0.5, selected from the Subaru/XMM-Newton Deep Field. We use the spectra to calculate velocity dispersions and central redshifts of the groups the radio galaxies inhabit, and combined with XMM-Newton (0.3-10 keV) X-ray observations investigate the L_X--sigma_v and T_X--sigma_v scaling relationships. All the radio galaxies reside in moderately rich groups -- intermediate environments between poor groups and rich clusters, with remarkably similar X-ray properties. We concentrate our discussion on our best statistical example that we interpret as a low-power (FRI) source triggered within a sub-group, which in turn is interacting with a nearby group of galaxies, containing the bulk of the X-ray emission for the system -- a basic scenario which can be compared to more powerful radio sources at both high (z>4) and low (z<0.1) redshifts. This suggests that galaxy-galaxy interactions triggered by group mergers may play an important role in the life-cycle of radio galaxies at all epochs and luminosities.
description: 12 pages, 7 figures, accepted for publication in MNRAS. High resolution version available upon request
The Dichotomy of the Halo of the Milky Way
Creators: name: Carollo, Daniela
name: Beers, Timothy C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We summarize evidence that the halo of the Milky Way comprises two different, and broadly overlapping, stellar components. The two structures exhibit different chemical compositions, spatial distributions, and kinematics. These results were obtained through an analysis of more than 20,000 calibration stars from the Sloan Digital Sky Survey (SDSS). The duality of the stellar halo directly impacts galaxy formation models, for the Milky Way and other large spirals.
description: 6 pages, 4 figures, to appear in Proceedings of the OMEG07 Conference, held in December 2007
Ion-beam therapy: from electron production in tissue like media to DNA damage estimations
Creators: name: Scifoni, Emanuele
name: Surdutovich, Eugene
name: Solov'yov, Andrey
name: Pshenichnov, Igor
name: Mishustin, Igor
name: Greiner, Walter
Publisher: name: arXiv
Year: 2008
Subjects: subject: Biological Physics (physics.bio-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Radiation damage induced by ion beams is traditionally treated at different levels of theoretical approaches, for the different scales and mechanisms involved.We present here details of a combined approach that, from a method at a nanoscopic scale, attempts to merge with higher scales existing results, by tuning the analytical method employed when extended to larger scale and so yielding a consistent picture of the entire process. Results will show the possibility to get a good agreement with macroscale methods and, on the other hand, to produce a reliable electron energy spectra to be used for DNA damage estimations.
description: 7 pages,5 figures, class files for AIP included
Dynamic Information Security Management Capability: Strategising for Organisational Performance
Creators: name: Onibere, Mazino
name: Ahmad, Atif
name: Maynard, Sean B
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: The increasing frequency, impact, consequence and sophistication of cybersecurity attacks is becoming a strategic concern for boards and executive management of organisations. Consequently, in addition to focusing on productivity and performance, organisations are prioritizing Information Security Management (ISM). However, research has revealed little or no conceptualisation of a dynamic ISM capability and its link to organisational performance. In this research, we set out to 1) define and describe an organisational level dynamic ISM capability, 2) to develop a strategic model that links resources with this dynamic capability, and then 3) empirically demonstrate how dynamic ISM capability contributes to firm performance. By drawing on Resource-Based Theory (RBT) and Dynamic Capabilities View (DCV), we have developed the Dynamic ISM Capability model to address the identified gap. As we develop this research, we will empirically test this model to demonstrate causality between ISM capability and organisational performance.
description: 7 pages
Mergers of primordial black holes in extreme clusters and the $H_0$ tension
Creators: name: Eroshenko, Yury
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We consider a cosmological model with dark matter in the form of $\sim10^{-12}M_\odot$ primordial black holes in dense weakly relativistic clusters with masses $18-560M_\odot$. It is shown that during the multiple collisions of the black holes the $\sim10$\% of the initial cluster mass can be transformed into gravitational waves in the time interval from recombination to the redshifts $z\geq 10$. At the recombination epoch, the density of matter was larger by $\sim10$\% and, accordingly, the universe expansion rate was higher. This leads to a shortening of the sound horizon scale, as is necessary to solve the "$H_0$ tension" problem.
description: 8 pages, 3 figures; updated with the accepted version
title: Theatre as a Battlefield for the Memory on the War in Croatia
Creators: name: Židek, Nikolina
Publisher: name: Universität Graz
Year: 2021

description: This paper historicizes the developments in Croatian theatre as a space of
fostering debate on the country’s recent past during the war (1991-1995) in
three periods: wartime and the post-war transition until Croatia started its
European Union accession negotiations (1990-2004), a new wave of dealing
with the past from 2005 to 2016, a reverse conservative wave from 2016 to
2019, and the indications of a comeback of counter-memory in 2020,
truncated by the pandemic. The study analyses the situation in Croatian
society and the main events that affected political and social life, explores
the functioning of Croatian theatre institutions, and examines the staged
plays, contextualises their plots by explaining the issues and events they
treat, and examines the reactions the staged plays provoked, as well as how
their effects multiplied beyond the theatre audience. The results showed
that after the first period when Croatian playwriting was more focused on
war trauma, the theatre opened a crack in the society and contested the
hegemonic narrative of a victorious and victim nation. In spite of the reverse
trend as of 2013, the counter-memory shown in the theatre crossed the walls
and spread to a much bigger audience than that actually watching the
plays.
description: Keywords: Croatian theatre, memory, war in Croatia (1991-1995)
description: Contemporary Southeastern Europe, 2022, 8(2), 32-50
Merger as Intermittent Accretion
Creators: name: Delliou, Morgan Le
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Self-Similar Secondary Infall Model (SSIM) is modified to simulate a merger event. The model encompass spherical versions of tidal stripping and dynamical friction that agrees with the Syer & White merger paradigm's behaviour. The SSIM shows robustness in absorbing even comparable mass perturbations and returning to its original state. It suggests the approach to be invertible and allows to consider accretion as smooth mass inflow merging and mergers as intermittent mass inflow accretion.
description: letter accepted by A&A 29/09/08, 4 pages, colour figures
title: Architects as Memory Actors: Ruins, Reconstructions, and Memorials in Belgrade
Creators: name: Bădescu, Gruia
Publisher: name: Universität Graz
Year: 2021

description: This article examines the reshaping of Belgrade’s memorial landscape after the
Second World War and after the 1999 NATO bombings, with a focus on the role
of architects. As such, the paper shifts the scale of memory debates in two ways:
first, from the national to the urban; second, from ‘classical’ memory
entrepreneurs of the political realm to city makers, usually perceived as
‘technical’ actors, but, as the paper argues, in fact relevant memory actors both
through the way they influence sites of memory and through memory debates.
The article places the engagement of architects with narratives of heroism and
victimhood in Serbia in a historical perspective, examining the shift in
memorialisation after the Second World War. It then discusses the hesitant
approaches on engaging with ruins of the 1999 NATO bombing, highlighting
frictions between various actors in the Generalštab debate. Finally, it analyses
the distinctive memorial engagement with the ruins of the Radio Television of
Serbia (RTS) building by examining the bottom-up process of the competition
for the RTS memorial. The article highlights that, even if not intentionally or
by embracing memory-work, architecture and architects play a role in memory
processes, while deeply enmeshed in constellations of political and economic
power.
description: Keywords: architects, memory, memorials, ruins, reconstruction, Belgrade.
description: Contemporary Southeastern Europe, 2022, 8(2), 51-82
A brief account of Steven Weinberg's legacy in ab initio many-body theory
Creators: name: Drischler, Christian
name: Bogner, Scott K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: In this contribution to the special issue "Celebrating 30 years of Steven Weinberg's papers on Nuclear Forces from Chiral Lagrangians," we emphasize the important role chiral effective field theory has played in leading nuclear physics into a precision era. To this end, we share our perspective on a few of the recent advances made in ab initio calculations of nuclear structure and nuclear matter observables, as well as Bayesian uncertainty quantification of effective field theory truncation errors.
description: 10 pages, 6 figures; invited contribution to the special issue in Few-Body Systems "Celebrating 30 years of Steven Weinberg's papers on Nuclear Forces from Chiral Lagrangians"; minor improvements, close to published version
Local polynomial regression on unknown manifolds
Creators: name: Bickel, Peter J.
name: Li, Bo
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62G08, 62H12 (Primary) 62G20 (Secondary)

description: We reveal the phenomenon that ``naive'' multivariate local polynomial regression can adapt to local smooth lower dimensional structure in the sense that it achieves the optimal convergence rate for nonparametric estimation of regression functions belonging to a Sobolev space when the predictor variables live on or close to a lower dimensional manifold.
description: Published at http://dx.doi.org/10.1214/074921707000000148 in the IMS Lecture Notes Monograph Series (http://www.imstat.org/publications/lecnotes.htm) by the Institute of Mathematical Statistics (http://www.imstat.org)
Young stars and brown dwarfs surrounding Alnilam (eps Ori) and Mintaka (del Ori)
Creators: name: Caballero, J. A.
name: Solano, E.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Aims: We look for new regions for the search of substellar objects. Methods: Two circular areas, 45 arcmin-radius each, centred on the young massive star systems Alnilam and Mintaka in the Orion Belt, have been explored. The regions are very young (less than 10 Ma), have low extinction, and are neighbours to sigma Orionis (~3 Ma), a young open cluster very rich in brown dwarfs and planetary-mass objects. We have used Virtual Observatory tools, the astro-photometric Tycho-2, DENIS and 2MASS catalogues, 10 control fields at similar galactic latitudes, and X-ray, mid-infrared and spectroscopic data from the literature. Results: We have compiled exhaustive lists of known young stars and new candidate members in the Ori OB1b association, and of fore- and background sources. A total of 136 stars display features of extreme youth, like early spectral types, lithium in absorption, or mid-infrared flux excess. Other two young brown dwarf and 289 star candidates have been identified from an optical/near-infrared colour-magnitude diagram. We list additional 74 known objects that might belong to the association. This catalogue can serve as an input for characterisation of the stellar and high-mass substellar populations in the Orion Belt. Finally, we have investigated the surface densities and radial distributions of young objects surrounding Alnilam and Mintaka, and compared them with those in the sigma Orionis cluster. We report a new open cluster centred on Mintaka. Conclusions: Both regions can be analogs to the sigma Orionis cluster, but more massive, more extended, slightly older, and less radially concentrated.
description: Accepted for publication in A&A. It will be published on line in Sect. 14 (Catalogs and data). Tables in Appendix A will soon be available at the CDS
TO THE QUESTION OF PROPHETOLOGY
Creators: name: Mirzakhmedov, Abdirashid
name: Lukasheva, Natalya
name: Mirzakhmedov, Khurshid
name: Pardaeva, Sevara
Publisher: name: Zenodo
Year: 2023

description: The article explores the problems of prophecy, filled media pages with newly appeared prophets, which is an element of spiritual bankruptcy of public life. The subject of the research is a theoretical analysis of the phenomenon of prophets of world religions, in particular, the role of prophets in the formation of religious ideology, worldview of the individual, idealization for the morality of believers.
Can nebular HeII emission be explained by ultra-luminous X-ray sources?
Creators: name: Simmonds, Charlotte
name: Schaerer, Daniel
name: Verhamme, Anne
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The shape of the ionising spectra of galaxies is a key ingredient to reveal their physical properties and to our understanding of the ionising background radiation. A long-standing unsolved problem is the presence of HeII nebular emission in many low-metallicity star-forming galaxies. This emission requires ionising photons with energy >54 eV, which are not produced in sufficient amounts by normal stellar populations. To examine if high mass X-ray binaries and ultra-luminous X-ray sources (HMXB/ULX) can explain the observed HeII nebular emission and how their presence alters other emission lines, we compute photoionisation models of galaxies including such sources. We combine spectral energy distributions (SEDs) of integrated stellar populations with constrained SEDs of ULXs to obtain composite spectra with varying amounts of X-ray luminosity, parameterised by Lx/SFR. With these we compute photoionisation models to predict the emission line fluxes of the optical recombination lines of H and He+, and the main metal lines of OIII, OII, OI, and NII. The predictions are then compared to a large sample of low-metallicity galaxies. We find that it is possible to reproduce the nebular HeII and other line observations with our spectra and with amounts of Lx/SFR compatible with the observations. Our work suggests that HMBX/ULX could be responsible for the observed nebular HeII emission. However, the strengths of the high and low ionisation lines, such as HeII and OI, depend strongly on the X-ray contribution and on the assumed SEDs of the high energy source(s); the latter are poorly known.
description: Accepted by A&A on 13/09/2021
Enhancing Strategic Information Security Management in Organizations through Information Warfare Practices
Creators: name: Shah, Abid Hussain
name: Ahmad, Atif
name: Maynard, Sean B.
name: Naseer, Humza
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: In this short paper we argue that to combat APTs, organizations need a strategic level shift away from a traditional prevention centered approach to that of a response centered one. Drawing on the information warfare (IW) paradigm in military studies, and using Dynamic Capability Theory (DCT), this research examines the applicability of IW capabilities in the corporate domain. We propose a research framework to argue that conventional prevention centred response capabilities; such as incident response capabilities and IW centred security capabilities can be integrated into IW enabled dynamic response capabilities that improve enterprise security performance.
description: 8 pages
IMPROVING THE EFFECTIVENESS OF ACTIVE SAFETY SYSTEMS TO SIGNIFICANTLY REDUCE ACCIDENTS WITH VULNERABLE ROAD USERS
Creators: name: Ilona CIESLIK,
name: Kovaceva, Jordanka
name: Bruyas, Marie-Pierre
name: Large, David R.
name: Kunert, Martin
name: Krebs, Sebastian
name: Arbitmann, Maxim
Publisher: name: Zenodo
Year: 2019
Subjects: Active safety
Advanced Driver Assistance Systems (ADAS)
Vulnerable Road Users (VRU)
Autonomous Emergency Braking (AEB)
video and radar technology

description: PROSPECT aims to significantly improve the effectiveness of active VRU safety systems compared to those currently on the market by:

•Expanding the scope of urban scenarios addressed,

•Improving the overall AEB/AES system performance,

•Proposing extensive validation methodologies.
Measuring the User Satisfaction in a Recommendation Interface with Multiple Carousels
Creators: name: Felicioni, Nicolò
name: Dacrema, Maurizio Ferrari
name: Cremonesi, Paolo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: Human-Computer Interaction (cs.HC)
subject: Machine Learning (cs.LG)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: It is common for video-on-demand and music streaming services to adopt a user interface composed of several recommendation lists, i.e. widgets or swipeable carousels, each generated according to a specific criterion or algorithm (e.g. most recent, top popular, recommended for you, editors' choice, etc.). Selecting the appropriate combination of carousel has significant impact on user satisfaction. A crucial aspect of this user interface is that to measure the relevance a new carousel for the user it is not sufficient to account solely for its individual quality. Instead, it should be considered that other carousels will already be present in the interface. This is not considered by traditional evaluation protocols for recommenders systems, in which each carousel is evaluated in isolation, regardless of (i) which other carousels are displayed to the user and (ii) the relative position of the carousel with respect to other carousels. Hence, we propose a two-dimensional evaluation protocol for a carousel setting that will measure the quality of a recommendation carousel based on how much it improves upon the quality of an already available set of carousels. Our evaluation protocol takes into account also the position bias, i.e. users do not explore the carousels sequentially, but rather concentrate on the top-left corner of the screen. We report experiments on the movie domain and notice that under a carousel setting the definition of which criteria has to be preferred to generate a list of recommended items changes with respect to what is commonly understood.
Pinitol ameliorates impaired pressure-natriuresis in experimental diabetes
Creators: name: Nilberto R. F. Nascimento
name: Lôrrainy U. A. S. Cortez
name: Sousa, Luis Gustavo Farias De
name: Manasses C. Fonteles
name: Santos, Cláudia Ferreira
Publisher: name: Figshare
Year: 2019
Subjects: subject: Physiology
subject: FOS: Biological sciences

description: Pressure-induced natriuresis is a physiological protective mechanism that counteracts increased blood pressure with increased diuresis and natriuresis...
Lyman Break Galaxies at z~5: Rest-frame UV Spectra II
Creators: name: Ando, Masataka
name: Ohta, Kouji
name: Iwata, Ikuru
name: Akiyama, Masayuki
name: Aoki, Kentaro
name: Tamura, Naoyuki
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the results of spectroscopy of Lyman Break Galaxies (LBGs) at z~5 in the J0053+1234 field with the Faint Object Camera and Spectrograph on the Subaru telescope. Among 5 bright candidates with z' < 25.0 mag, 2 objects are confirmed to be at z~5 from their Ly alpha emission and the continuum depression shortward of Ly alpha. The EWs of Ly alpha emission of the 2 LBGs are not so strong to be detected as Ly alpha emitters, and one of them shows strong low-ionized interstellar (LIS) metal absorption lines. Two faint objects with z' \geq 25.0 mag are also confirmed to be at z~5, and their spectra show strong Ly alpha emission in contrast to the bright ones. These results suggest a deficiency of strong Ly alpha emission in bright LBGs at z~5, which has been discussed in our previous paper. Combined with our previous spectra of LBGs at z~5 obtained around the Hubble Deep Field-North (HDF-N), we made a composite spectrum of UV luminous (M_1400 \leq -21.5 mag) LBGs at z~5. The resultant spectrum shows a weak Ly alpha emission and strong LIS absorptions which suggests that the bright LBGs at z~5 have chemically evolved at least to ~0.1 solar metallicity. For a part of our sample in the HDF-N region, we obtained near-to-mid infrared data, which constraint stellar masses of these objects. With the stellar mass and the metallicity estimated from LIS absorptions, the metallicities of the LBGs at z~5 tend to be lower than those of the galaxies with the same stellar mass at z \lesssim 2, although the uncertainty is very large.
description: 17 pages, 5 figures, accepted for publication in PASJ
Muon decay in an SU(2) x U(1) gauge theory with spinor and vector higgs fields and massive majorana neutrinos
Creators: name: Hamilton, John Dwayne
Publisher: name: University of British Columbia
Year: 2010

description: This thesis investigates the implications for muon decay of a gauge theory that incorporates modifications to the standard electro-weak theory, the Weinberg-Salam model. The Higgs sector of the original model is broadened to include an iso-vector or triplet Higgs field. Such an addition naturally provides for massive Majorana-type neutrinos and permits the decay modesμ → e and μ → 3e which would not otherwise be allowed. The particles most responsible for these decay modes are new, charged, physical, scalar Higgs particles not present in the Weinberg-Salam model. The decay rates found, although considerably more favorable to muon decay than the simple addition of neutrino mass to the standard theory, are found to be much below the present limits of experimental detectability. The lengthy calculations required, including the derivation and utilization of the relevant Feynman diagrams, are displayed in some detail.