cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Glycomics as an innovative technology to identify biomarkers of aging
Creators: name: Borelli, Vincenzo <1984>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2014
Subjects: MED/04 Patologia generale

description: Introduction. Glycomic analysis allows investigating on the global glycome within body fluids (as serum/plasma), this could eventually lead to identify new types of disease biomarkers, or as in this study, biomarkers of human aging studying specific aging models. Recent studies demonstrated that the plasma N-glycome is modified during human aging, suggesting that measurements of log-ratio of two serum/plasma N-glycans (NGA2F and NA2F), named GlycoAge test could provide a non-invasive biomarker of aging. Down syndrome (DS) is a genetic disorder in which multiple major aspects of senescent phenotype occur much earlier than in healthy age-matched subjects and has been often defined as an accelerated aging syndrome. The aim of this study was to compare plasma N-glycome of patients affected by DS with age- and sex matched non-affected controls, represented by their siblings (DSS), in order to assess if DS is characterized by a specific N-glycomic pattern. Therefore, in order to investigate if N-glycans changes that occur in DS were able to reveal an accelerated aging in DS patients, we enrolled the mothers (DSM) of the DS and DSS, representing the non-affected control group with a different chronological age respect to DS. We applied two different N-glycomics approaches on the same samples: first, in order to study the complete plasma N-glycome we applied a new high-sensitive protocol based on a MALDI-TOF-MS approach, second, we used DSA-FACE technology. Results: MALDI-TOF/MS analysis detected a specific N-glycomics signature for DS, characterized by an increase of fucosylated and bisecting species. Moreover, in DS the abundance of agalactosylated (as NA2F) species was similar or higher than their mothers. The measurement of GlycoAge test with DSA-FACE, validated also by MALDI-TOF, demonstrated a strongly association with age, moreover in DS, it’s value was similar to their mothers, and significantly higher than their age- and sex matched not-affected siblings
Effect of external electric field on the charge density waves in one dimensional Hubbard superlattices
Creators: name: Chowdhury, Jayeeta
name: Karmakar, S. N.
name: Bhattacharyya, Bibhas
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We have studied the ground state of the one dimensional Hubbard superlattice structures with different unit cell sizes in the presence of electric field. Self consistent Hartree-Fock approximation calculation is done in the weak to intermediate interaction regime. Studying the charge gap at the Fermi level and the charge density structure factor, we get an idea how the charge modulation on the superlattice is governed by the competition between the electronic correlation and the external electric field.
description: 6 pages, 8 figures. accepted in Journal of Physics: Condensed Matter
Energy Transport in 1-Dimensional Oscillator Arrays With Hysteretic Damping
Creators: name: Bountis, Tassos
name: Kaloudis, Konstantinos
name: Shena, Joniald
name: Skokos, Charalampos
name: Spitas, Christos
Publisher: name: arXiv
Year: 2021
Subjects: subject: Dynamical Systems (math.DS)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Energy transport in 1-dimensional oscillator arrays has been extensively studied to date in the conservative case, as well as under weak viscous damping. When driven at one end by a sinusoidal force, such arrays are known to exhibit the phenomenon of supratransmission, i.e. a sudden energy surge above a critical driving amplitude. In this paper, we study 1-dimensional oscillator chains in the presence of hysteretic damping, and include nonlinear stiffness forces that are important for many materials at high energies. We first employ Reid's model of local hysteretic damping, and then study a new model of nearest neighbor dependent hysteretic damping to compare their supratransmission and wave packet spreading properties in a deterministic as well as stochastic setting. The results have important quantitative differences, which should be helpful when comparing the merits of the two models in specific engineering applications.
description: Submitted
Giovanni Paolo Marana’s Turkish Spy and the Police of Louis XIV: the Fear of Being Secretly Observed by Trained Agents in Early Modern Europe
Creators: name: Porada, Aleksandra
Publisher: name: Università degli  Studi di Milano
Year: 2014
Subjects: French literature; Italian literature; epistolary novel; spy story; Enlightenment; Deism

description: Giovanni Paolo Marana’s epistolary novel, entitled l’Espion du Grand-Seigneur and published for the first time in the 1680s, was a pioneering work of a genre that was to flourish much later, namely spy story. The story features an Arab who comes to Paris in 1637 and spends the next 45 years collecting information about French government’s activity without being ever identified by French counter-intelligence. The main character was an undercover agent of a Muslim empire, who watched Christians with contempt - and yet the book that pretended to be just a bunch of his letters, accidentally found and translated from Arabic by Marana, was a bestseller in late seventeenth- and then eighteenth-century Western Europe. The paper presents the fates of the work and discusses the reasons of its huge success. Apart from the fact that the novel was written in a brilliant style, and published at the time when the ongoing Habsburg-Turkish war had triggered intensive interest in the Muslim East, one of these reasons was the fact that it was published in the time when in France a modern police force was created. Its tasks included collecting information about political opinions, religious practices and intimate lives of the Sun King’s subjects. The new feeling of being observed by the government’s men and informers certainly prepared the ground for the success of the first spy story of the West.
description: Altre Modernità, No 11 (2014): Spionaggi
Understanding interference experiments with polarized light through photon trajectories
Creators: name: Sanz, A. S.
name: Davidovic, M.
name: Bozic, M.
name: Miret-Artes, S.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Bohmian mechanics allows to visualize and understand the quantum-mechanical behavior of massive particles in terms of trajectories. As shown by Bialynicki-Birula, Electromagnetism also admits a hydrodynamical formulation when the existence of a wave function for photons (properly defined) is assumed. This formulation thus provides an alternative interpretation of optical phenomena in terms of photon trajectories, whose flow yields a pictorial view of the evolution of the electromagnetic energy density in configuration space. This trajectory-based theoretical framework is considered here to study and analyze the outcome from Young-type diffraction experiments within the context of the Arago-Fresnel laws. More specifically, photon trajectories in the region behind the two slits are obtained in the case where the slits are illuminated by a polarized monochromatic plane wave. Expressions to determine electromagnetic energy flow lines and photon trajectories within this scenario are provided, as well as a procedure to compute them in the particular case of gratings totally transparent inside the slits and completely absorbing outside them. As is shown, the electromagnetic energy flow lines obtained allow to monitor at each point of space the behavior of the electromagnetic energy flow and, therefore, to evaluate the effects caused on it by the presence (right behind each slit) of polarizers with the same or different polarization axes. This leads to a trajectory-based picture of the Arago-Fresnel laws for the interference of polarized light.
description: 36 pages, 6 figures
CEO PAY AND FINANCIAL PERFORMANCE OF LISTED DEPOSIT MONEY BANKS IN NIGERIA
Creators: name: HALEEMAH YETUNDE ZIK-RULLAHI
name: NASIRU YUNUSA
name: JIDE IBIKUNLE
name: FESTUS OKWO
name: LATIFAH OPEYEMI ADEWALE
Publisher: name: Zenodo
Year: 2024
Subjects: CEO Compensation, Net Interest Margin (NIM), Tobin's Q, Financial Performance.

description: Abstract

This study investigates the impact of Chief Executive Officer (CEO) compensation on the financial performance of listed deposit money banks in Nigeria, specifically focusing on Net Interest Margin (NIM) and Tobin’s Q. Utilising regression analysis, the study examines whether variations in CEO pay influence these financial performance indicators. The findings reveal a statistically significant negative relationship between CEO Pay and NIM, with a beta coefficient of -0.0004677 (p-value = 0.02). This suggests that higher CEO Pay is associated with a decrease in NIM, contradicting the hypothesis that increased compensation would enhance financial performance. In contrast, no significant relationship was found between CEO Pay and Tobin’s Q, as indicated by a beta coefficient of -0.000131 (p-value = 0.71). This suggests that CEO Pay does not meaningfully affect Tobin’s Q. The results imply that while higher CEO Pay may negatively impact NIM, it does not significantly influence Tobin’s Q, suggesting a need for a reassessment of compensation structures to better align with financial performance objectives. The study recommends reevaluating compensation models to emphasize long-term performance and implementing more comprehensive performance-based incentives to improve overall financial outcomes.
Finite-frequency dynamics of vortex loops at the $^4$He superfluid phase transition
Creators: name: Williams, Gary A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The finite-frequency dynamics of the $^4$He superfluid phase transition can be formulated in terms of the response of thermally excited vortex loops to an oscillating flow field. The key parameter is the Hausdorff fractal dimension $d_H$ of the loops, which affects the dynamics because the frictional force on a loop is proportional to the total perimeter $P$ of the loop, which varies as $P \sim a^{d_H}$ where $a$ is the loop diameter. Solving the 3D Fokker-Planck equation for the loop response at frequency $ω$ yields a superfluid density which varies at $T_λ$ as $ω^{1/(d_H -1)}$. This power-law variation with $ω$ agrees with the scaling form found by Fisher, Fisher, and Huse, since the dynamic exponent $z$ is identified as $z = d_H-1$. Flory scaling for the self-avoiding loops gives a fractal dimension in terms of the space dimension $d$ as $d_H = (d+2)/2$, yielding $z = d/2 = 3/2$ for d = 3, in complete agreement with dynamic scaling.
description: 4 pages, submitted to Journal of Physics: Conference Series (Proceedings of LT25)
Detecting low-mass haloes with strong gravitational lensing I: the effect of data quality and lensing configuration
Creators: name: Despali, Giulia
name: Vegetti, Simona
name: White, Simon D. M.
name: Powell, Devon M.
name: Stacey, Hannah R.
name: Fassnacht, Christopher D.
name: Rizzo, Francesca
name: Enzi, Wolfgang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: This paper aims to quantify how the lowest halo mass that can be detected with galaxy-galaxy strong gravitational lensing depends on the quality of the observations and the characteristics of the observed lens systems. Using simulated data, we measure the lowest detectable NFW mass at each location of the lens plane, in the form of detailed \emph{sensitivity maps}. In summary, we find that: (i) the lowest detectable mass $M_{\rm low}$ decreases linearly as the signal-to-noise ratio (SNR) increases and the sensitive area is larger when we decrease the noise; (ii) a moderate increase in angular resolution (0.07" vs 0.09") and pixel scale (0.01" vs 0.04") improves the sensitivity by on average 0.25 dex in halo mass, with more significant improvement around the most sensitive regions; (iii) the sensitivity to low-mass objects is largest for bright and complex lensed galaxies located inside the caustic curves and lensed into larger Einstein rings (i.e $r_{E}\geq1.0"$). We find that for the sensitive mock images considered in this work, the minimum mass that we can detect at the redshift of the lens lies between $1.5\times10^{8}$ and $3\times10^{9}M_{\odot}$. We derive analytic relations between $M_{\rm low}$, the SNR and resolution and discuss the impact of the lensing configuration and source structure. Our results start to fill the gap between approximate predictions and real data and demonstrate the challenging nature of calculating precise forecasts for gravitational imaging. In light of our findings, we discuss possible strategies for designing strong lensing surveys and the prospects for HST, Keck, ALMA, Euclid and other future observations.
description: 17 pages, 11 figures, accepted for publication in MNRAS. Comments welcome
The M31 globular cluster system: ugriz and K-band photometry and structural parameters
Creators: name: Peacock, Mark B.
name: Maccarone, Thomas J.
name: Knigge, Christian
name: Kundu, Arunav
name: Waters, Christopher Z.
name: Zepf, Stephen E.
name: Zurek, David R.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present an updated catalogue of M31 globular clusters (GCs) based on images from the Wide Field CAMera (WFCAM) on the UK Infrared Telescope and from the Sloan Digital Sky Survey (SDSS). Our catalogue includes new, self-consistent ugriz and K-band photometry of these clusters. We discuss the difficulty of obtaining accurate photometry of clusters projected against M31 due to small scale background structure in the galaxy. We consider the effect of this on the accuracy of our photometry and provide realistic photometric error estimates. We investigate possible contamination in the current M31 GC catalogues using the excellent spatial resolution of these WFCAM images combined with the SDSS multicolour photometry. We identify a large population of clusters with very blue colours. Most of these have recently been proposed by other work as young clusters. We distinguish between these, and old clusters, in the final classifications. Our final catalogue includes 416 old clusters, 156 young clusters and 373 candidate clusters. We also investigate the structure of M31's old GCs using previously published King model fits to these WFCAM images. We demonstrate that the structure and colours of M31's old GC system are similar to those of the Milky Way. One GC (B383) is found to be significantly brighter in previous observations than observed here. We investigate all of the previous photometry of this GC and suggest that this variability appears to be genuine and short lived. We propose that the large increase in its luminosity my have been due to a classical nova in the GC at the time of the previous observations in 1989.
description: Accepted for publication in MNRAS: 17 pages, 11 figures and 3 tables. Table 1 is available in full from http://www.astro.soton.ac.uk/~m.b.peacock/m31gc.html
Halcyon: An AI-Powered Forum with Automated Hate Speech Detection
Creators: name: Rajesh Babu, Aneesha
name: Li, Xiaorong
Publisher: name: Singapore Institute of Technology
Year: 2024
Subjects: classificationCode: 460208
subject: Natural language processing

description: The growth of hate speech and online harassment on social media platforms makes the creation of efficient solutions to address this persistent problem necessary. A promising method for locating and monitoring hate speech in social media is sentiment analysis, a computational tool that auto detects and assesses the emotional tone of text. To empower platforms to take preventative action against the spread of hate speech, this work addresses the use of sentiment analysis as a tool to identify and analyse hate speech. In this paper, we focus on hate detection in textual content and use machine learning algorithms to categorize and measure hateful content. This approach can assist in content moderation, enhance user safety, and foster a more positive online environment. To improve the precision and dependability of sentiment analysis algorithms, issues including context sensitivity and changing language patterns must be addressed. The AI-enabled discussion forum in?corporates an innovative design that addresses hate speech discussions through machine learning algorithms and active tagging to improve accuracy.
Modal, Spectral, and Polarization Entanglement in Guided-Wave Parametric Down-Conversion
Creators: name: Saleh, Mohammed F.
name: Saleh, Bahaa E. A.
name: Teich, Malvin Carl
Publisher: name: arXiv
Year: 2009
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We examine the modal, spectral, and polarization entanglement properties of photon pairs generated in a nonlinear, periodically poled, two-mode waveguide (1-D planar or 2-D circular) via nondegenerate spontaneous parametric down-conversion. Any of the possible degrees of freedom -- mode number, frequency, or polarization -- can be used to distinguish the down-converted photons while the others serve as attributes of entanglement. Distinguishing the down-converted photons based on their mode numbers enables us to efficiently generate spectral or polarization entanglement that is either narrowband or broadband. On the other hand, when the generated photons are distinguished by their frequencies in a Type-0 process, modal entanglement turns out to be an efficient alternative to polarization entanglement. Moreover, modal entanglement in Type-II down-conversion may be used to generate a doubly entangled state in frequency and polarization.
description: 10 pages, 9 figures, journal paper
deepstruct -- linking deep learning and graph theory
Creators: name: Stier, Julian
name: Granitzer, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: Neural and Evolutionary Computing (cs.NE)
subject: FOS: Computer and information sciences
subject: I.2.0; F.0

description: deepstruct connects deep learning models and graph theory such that different graph structures can be imposed on neural networks or graph structures can be extracted from trained neural network models. For this, deepstruct provides deep neural network models with different restrictions which can be created based on an initial graph. Further, tools to extract graph structures from trained models are available. This step of extracting graphs can be computationally expensive even for models of just a few dozen thousand parameters and poses a challenging problem. deepstruct supports research in pruning, neural architecture search, automated network design and structure analysis of neural networks.
Localization of Matters on Anti-de Sitter Thick Branes
Creators: name: Liu, Yu-Xiao
name: Guo, Heng
name: Fu, Chun-E
name: Ren, Ji-Rong
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: By presenting the mass-independent potentials of the Kaluza-Klein (KK) modes in the corresponding Schrödinger equations, we investigate the localization and mass spectra of various bulk matter fields on an AdS thick brane. For a spin 0 scalar $Φ$ coupled with itself and the domain-wall-forming field $ϕ$ via a coupling potential $V=(λϕ^{2}-u^{2})Φ^{2}+τΦ^{4}$, the localization and spectrum are decided by a critical coupling constant $λ_{0}$. When $λ>λ_0$, the potential of the scalar KK modes in the corresponding Schrödinger equation tends to infinite when far away from the brane, which results in that there exist infinite discrete scalar bound KK states, and the massless modes could be trapped on the AdS brane by fine-tuning of parameters. When $λλ_0$, but the zero mode can not be localized on the brane. For a spin 1/2 fermion, we introduce the usual Yukawa coupling $η\barΨϕΨ$, and find that the localization of the fermion is decided by a critical coupling constant $η_0$. For $η> η_0$, the four-dimensional massless left chiral fermion and massive Dirac fermions consisted of the pairs of coupled left-hand and right-hand KK modes could be localized on the AdS brane, and the massive Dirac fermions have a set of discrete mass spectrum. While for the case $0
description: 23 pages, 17 figures, published version
Parker Solar Probe evidence for the absence of whistlers close to the Sun to scatter strahl and regulate heat flux
Creators: name: Cattell, C.
name: Breneman, A.
name: Dombeck, J.
name: Hanson, E.
name: Johnson, M.
name: Halekas, J.
name: Bale, S. D.
name: de Wit, T. Dudok
name: Goetz, K.
name: Goodrich, K.
name: Malaspina, D.
name: Pulupa, M.
name: Case, T.
name: Kasper, J. C.
name: Larson, D.
name: Stevens, M.
name: Whittlesey, P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Using the Parker Solar Probe FIELDS bandpass filter data and SWEAP electron data from Encounters 1 through 9, we show statistical properties of narrowband whistlers from ~16 Rs to ~130 Rs, and compare wave occurrence to electron properties including beta, temperature anisotropy and heat flux. Whistlers are very rarely observed inside ~28 Rs (~0.13 au). Outside 28 Rs, they occur within a narrow range of parallel electron beta from ~1 to 10, and with a beta-heat flux occurrence consistent with the whistler heat flux fan instability. Because electron distributions inside ~30 Rs display signatures of the ambipolar electric field, the lack of whistlers suggests that the modification of the electron distribution function associated with the ambipolar electric field or changes in other plasma properties must result in lower instability limits for the other modes (including solitary waves, ion acoustic waves) that are observed close to the Sun. The lack of narrowband whistler-mode waves close to the Sun and in regions of either low (10) beta is also significant for the understanding and modeling of the evolution of flare-accelerated electrons, and the regulation of heat flux in astrophysical settings including other stellar winds, the interstellar medium, accretion disks, and the intra-galaxy cluster medium
Spectral Singularities of Complex Scattering Potentials and Infinite Reflection and Transmission Coefficients at real Energies
Creators: name: Mostafazadeh, Ali
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Spectral singularities are spectral points that spoil the completeness of the eigenfunctions of certain non-Hermitian Hamiltonian operators. We identify spectral singularities of complex scattering potentials with the real energies at which the reflection and transmission coefficients tend to infinity, i.e., they correspond to resonances having a zero width. We show that a wave guide modeled using such a potential operates like a resonator at the frequencies of spectral singularities. As a concrete example, we explore the spectral singularities of an imaginary PT-symmetric barrier potential and demonstrate the above resonance phenomenon for a certain electromagnetic wave guide.
description: Published version
Spitzer and HHT observations of starless cores: masses and environments
Creators: name: Stutz, Amelia M.
name: Rieke, George H.
name: Bieging, John H.
name: Balog, Zoltan
name: Heitsch, Fabian
name: Kang, Miju
name: Peters, William L.
name: Shirley, Yancy L.
name: Werner, Michael W.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present Spitzer observations of a sample of 12 starless cores selected to have prominent 24 micron shadows. The Spitzer images show 8 and 24 micron shadows and in some cases 70 micron shadows; these spatially resolved absorption features trace the densest regions of the cores. We have carried out a 12CO (2-1) and 13CO (2-1) mapping survey of these cores with the Heinrich Hertz Telescope (HHT). We use the shadow features to derive optical depth maps. We derive molecular masses for the cores and the surrounding environment; we find that the 24 micron shadow masses are always greater than or equal to the molecular masses derived in the same region, a discrepancy likely caused by CO freeze--out onto dust grains. We combine this sample with two additional cores that we studied previously to bring the total sample to 14 cores. Using a simple Jeans mass criterion we find that ~ 2/3 of the cores selected to have prominent 24 micron shadows are collapsing or near collapse, a result that is supported by millimeter line observations. Of this subset at least half have indications of 70 micron shadows. All cores observed to produce absorption features at 70 micron are close to collapse. We conclude that 24 micron shadows, and even more so the 70 micron ones, are useful markers of cloud cores that are approaching collapse.
description: 41 pages, 28 figures, 5 tables; accepted by ApJ
The determination of planetary structure in tidally relaxed inclined systems
Creators: name: Mardling, Rosemary A.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: [Abridged] The recent discovery of a transiting planet on a non-circular orbit with a massive highly eccentric companion orbiting HAT-P-13 offers the possibility of probing the structure of the short-period planet. The ability to do this relies on the system being in a quasi-equilibrium state in the sense that the eccentricities are constant on the usual secular timescale, and decay on a timescale which is much longer than the age of the system. Since the equilibrium eccentricity is effectively a function only of observable system parameters and the unknown Love number of the short-period planet, the latter can be determined with accurate measurements of the planet's eccentricity and radius. However, this analysis relies on the unlikely assumption that the system is coplanar. Here we generalize our recent analysis of this fixed-point phenomenon to mutually inclined systems and show that the fixed point of coplanar systems is replaced by a limit cycle, with the average value of the eccentricity decreasing and its amplitude of variation increasing with increasing mutual inclination. This behaviour significantly reduces the ability to unambiguously determine the Love number of the short-period planet if the mutual inclination is higher than around 10^o. We show that for Q-values less than 10^6, the HAT-P-13 system cannot have a mutual inclination between 54 and 126^o because Kozai oscillations coupled with tidal dissipation would act to quickly move the inclination outside this range, and that the behaviour of retrograde systems is the mirror image of that for prograde systems. We derive a relationship between the equilibrium radius of the short-period planet, its Q-value and its core mass, and show that given current estimates of e_b and the planet radius, the HAT-P-13 system is likely to be close to coplanar [...]
description: 24 pages, 14 figures, Accepted for publication in MNRAS. **NOTE REFINED PREDICTION FOR MUTUAL INCLINATION
An approach of the interior of a black hole type Schwarzschild
Creators: name: Ramírez, J. Enrique H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Our goal in this paper is to explain the internal properties of the black hole by considering its density as a function of the reciprocal of its radius and the temperature as a function of the reciprocal of the density. We then set the temperature to the Hawking temperature. This gives all the macroscopic quantities of the black hole, such as heat capacity, pressure, surface gravity, and equation of state. In this work, we only consider a black hole with mass M , radius r+ and vacuum. Two internal forces and the corresponding potential are obtained. In addition, the potential of the vacuum, the potential of the black hole, the effective potential, the density of the vacuum and the effective density are obtained. A possible nexus of the model developed in this work with the observational data is also shown. The rotation curve of the galaxies around the clusters is shown, which fits the experimental curve.
description: 14 figures, 20 pages
Resource Requirements for Fault-Tolerant Quantum Simulation: The Transverse Ising Model Ground State
Creators: name: Clark, Craig R.
name: Brown, Kenneth R.
name: Metodi, Tzvetan S.
name: Gasster, Samuel D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We estimate the resource requirements, the total number of physical qubits and computational time, required to compute the ground state energy of a 1-D quantum Transverse Ising Model (TIM) of N spin-1/2 particles, as a function of the system size and the numerical precision. This estimate is based on analyzing the impact of fault-tolerant quantum error correction in the context of the Quantum Logic Array (QLA) architecture. Our results show that due to the exponential scaling of the computational time with the desired precision of the energy, significant amount of error correciton is required to implement the TIM problem. Comparison of our results to the resource requirements for a fault-tolerant implementation of Shor's quantum factoring algorithm reveals that the required logical qubit reliability is similar for both the TIM problem and the factoring problem.
description: 19 pages, 8 figures
title: Hallazgos en imagen de la diseminación perineural en las neoplasias de cabeza y cuello.
Creators: name: Rubio Sierra, Marly Pierina
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Neoplasia
subject: Metastases
subject: Localisation
subject: Image compression
subject: Technical aspects
subject: CT
subject: MR
subject: Ear / Nose / Throat
subject: Neuroradiology peripheral nerve
subject: Salivary glands

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Revisar los hallazgos en imagen de la diseminación perineural (DP) en las neoplasias de cabeza y cuello localmente avanzadas. Describir su forma de presentación en Resonancia Magnética y Tomografía Computarizada y presentar algunos ejemplos...
Situation Recognition in Complex Operational Domains using Temporal and Description Logics – A Motivation from the Automotive Domain
Creators: name: Westhofen, Lukas
Publisher: name: Zenodo
Year: 2023

description: When confronted with automated systems operating in highly complex domains, such as urban road traffic, situations relevant to the automation must be recognized in data. Our presentation makes a case for temporal querying over expressive description logics as a suitable solution to this task. To highlight its benefits, we contribute a practical motivation for temporal querying from the field of scenario-based assessment of automated driving systems. We identify desired properties of such temporal queries and devise a tailor-made language for them, based on top of Mission-Time Linear Temporal Logic and Conjunctive Queries. Finally, we present a summary of our ongoing work regarding an implementation of this language.
Singular value distribution of the propagation matrix in random scattering media
Creators: name: Aubry, Alexandre
name: Derode, Arnaud
Publisher: name: arXiv
Year: 2009
Subjects: subject: Classical Physics (physics.class-ph)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences

description: The distribution of singular values of the propagation operator in a random medium is investigated, in a backscattering configuration. Experiments are carried out with pulsed ultrasonic waves around 3 MHz, using an array of 64 programmable transducers placed in front of a random scattering medium. The impulse responses between each pair of transducers are measured and form the response matrix. The evolution of its singular values with time and frequency is computed by means of a short-time Fourier analysis. The mean distribution of singular values exhibits very different behaviours in the single and multiple scattering regimes. The results are compared with random matrix theory. Once the experimental matrix coefficients are renormalized, experimental results and theoretical predictions are found to be in a very good agreement. Two kinds of random media have been investigated: a highly scattering medium in which multiple scattering predominates and a weakly scattering medium. In both cases, residual correlations that may exist between matrix elements are shown to be a key parameter. Finally, the possibility of detecting a target embedded in a random scattering medium based on the statistical properties of the strongest singular value is discussed.
description: 41 pages, 10 figures, definitive version
title: Formas esporádicas de la Enfermedad de Creutzfeldt-Jakob
Creators: name: Mejía Gómez, Catalina
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Acute
subject: Pathology
subject: Outcomes analysis
subject: MR
subject: Neuroradiology brain

description: Objetivos
Material y método
Resultados
Conclusiones
Bibliografía
description: Objetivos:
La enfermedad de Creutzfeldt-Jacob (ECJ) es una degeneración espongiforme del cerebro secundaria al acumulo de proteínas prionicas. La forma esporádica representa el 85% de los casos.
El diagnosticó se basa en conjunto con la...
title: Importancia y utilidad del “spot sign y spot sign score”
Creators: name: López Farfan, Anyi Milena
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Neuroradiology brain

description: Objetivos
Material y método
Resultados
Conclusiones
Bibliografía
description: Objetivos:
El propósito de este estudio es analizar la relación que existe entre Spot Sign,
la expansión del hematoma intracerebral espontaneo y una mayor morbi-mortalidad en estos pacientes. Mostrar la utilidad del Spot Sign...
Constraining sterile neutrinos with a low energy beta-beam
Creators: name: Agarwalla, Sanjib K.
name: Huber, Patrick
name: Link, Jonathan M.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We show that a low energy beta-beam facility can be used to search for sterile neutrinos by measuring the disappearance of electron anti-neutrinos. This channel is particularly sensitive since it allows to use inverse beta decay as detection reaction; thus it is free from hadronic uncertainties, provided the neutrino energy is below the pion production threshold. This corresponds to a choice of the Lorentz gamma=30 for the 6He parent ion. Moreover, a disappearance measurement allows the constraint of sterile neutrino properties independently of any CP violating effects. A moderate detector size of a few 100 tons and ion production rates of 2E13 per second are sufficient to constrain mixing angles as small as \sin^22θ=0.01 at 99% confidence level.
description: 12 pages, 5 figures. Minor clarifications and few references added. Accepted in JHEP
title: Apendicitis aguda: Seguimiento de 4 años.
Creators: name: Moreno Puertas, Álvaro Emilio
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Abdomen
subject: Gastrointestinal tract
subject: Ultrasound
subject: CT

description: Objetivos
Material y método
Resultados
Conclusiones
Bibliografía
description: Objetivos:
Reconocer los hallazgos radiologicos asociados a la apendicitis aguda,
puesto que es la patología quirúrgica abdominal más frecuente en nuestro medio. Demostrar que la ecografía es una prueba de imagen muy fiable a la hora del diagnóstico de la...
e-Commerce Mobile Systems Development with Enhanced Microservice Architecture Design
Creators: name: Saif Ali Khan Bin Mohamed Aowtab Khan, Mohamed
name: Li, Xiaorong
Publisher: name: Singapore Institute of Technology
Year: 2024

description: This paper investigates the suitability of using microservice architecture over monolithic for e?Commerce mobile applications. It examines past studies on this topic and provides a more detailed comparison between the two architectures, especially with their development processes. It also tackles the common issue of complex testing environments found in microservice systems by proposing a new feature called the Core Logger. Comparative study has been conducted to compare two e-Commerce systems with the same set of features based on a monolithic backend and a microservice backend. The microservice system contains the proposed Core Logger feature, which prints out the messages from all services in a sequential manner. The results showed that while the microservice system was initially harder to develop, it offered better overall scalability in development and performance. The Core Logger can reduce the time taken significantly during testing for the microservice system. The paper concludes by recommending the initial usage of the monolithic architecture before later migrating to a microservice backend for its better scalability, along with the implementation of the Core Logger which helps in expediting the testing process and shortening the overall development period.
Interplay of nonreciprocity and nonlinearity on mean-field energy and dynamics of a Bose-Einstein condensate in a double-well potential
Creators: name: Wu, Yi-Piao
name: Zhang, Guo-Qing
name: Zhang, Cai-Xia
name: Xu, Jian
name: Zhang, Dan-Wei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the mean-field energy spectrum and dynamics in a Bose-Einstein condensate in a double-well potential with non-Hermiticity from the nonreciprocal hopping, and show that the interplay of nonreciprocity and nonlinearity leads to exotic properties. Under the two-mode and mean-field approximations, the nonreciprocal generalization of the nonlinear Schrödinger equation and Bloch equations of motion for this system are obtained. We analyze the PT phase diagram and the dynamical stability of fixed points. The reentrance of PT-symmetric phase and the reformation of stable fixed points with increasing the nonreciprocity parameter are found. Besides, we uncover a linear self-trapping effect induced by the nonreciprocity. In the nonlinear case, the self-trapping oscillation is enhanced by the nonreciprocity and then collapses in the PT-broken phase, and can finally be recovered in the reentrant PT-symmetric phase.
description: accepted by Frontiers of Physics
Direct Far-Infrared Metal Abundances (FIRA) I: M101
Creators: name: Lamarche, C.
name: Smith, J. D.
name: Kreckel, K.
name: Linden, S. T.
name: Rogers, N. S. J.
name: Skillman, E.
name: Berg, D.
name: Murphy, E.
name: Pogge, R.
name: Donnelly, G. P.
name: Kennicutt, R.
name: Bolatto, A.
name: Croxall, K.
name: Groves, B.
name: Ferkinhoff, C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Accurately determining gas-phase metal-abundances within galaxies is critical as metals strongly affect the physics of the interstellar medium (ISM). To date, the vast majority of widely-used gas-phase abundance-indicators rely on emission from bright optical-lines, whose emissivities are highly sensitive to the electron temperature. Alternatively, direct-abundance methods exist that measure the temperature of the emitting gas directly, though these methods usually require challenging observations of highly-excited auroral lines. Low-lying far-infrared (FIR) fine-structure lines are largely insensitive to electron temperature and thus provide an attractive alternative to optically-derived abundances. Here, we introduce the far-infrared abundances (FIRA) project, which employs these FIR transitions, together with both radio free-free emission and hydrogen recombination-lines, to derive direct, absolute gas-phase oxygen-abundances. Our first target is M101, a nearby spiral-galaxy with a relatively steep abundance gradient. Our results are consistent with the O$^{++}$ electron-temperatures and absolute oxygen-abundances derived using optical direct-abundance methods by the CHemical Abundance Of Spirals (CHAOS) program, with a small difference ($\sim$ 1.5$σ$) in the radial abundance-gradients derived by the FIR/free-free-normalized vs. CHAOS/direct-abundance techniques. This initial result demonstrates the validity of the FIRA methodology $-$ with the promise of determining absolute metal-abundances within dusty star-forming galaxies, both locally and at high redshift.
description: 28 pages, 11 figures, 5 tables, accepted for publication in the Astrophysical Journal
Realization of Quantum Dipoles in Triangular Lattice Crystal Ba3Yb(BO3)3
Creators: name: Bag, Rabindranath
name: Ennis, Matthew
name: Liu, Chunxiao
name: Dissanayake, Sachith E.
name: Shi, Zhenzhong
name: Liu, Jue
name: Balents, Leon
name: Haravifard, Sara
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the thermodynamic properties of the ytterbium-based triangular lattice compound Ba3Yb(BO3)3. The results demonstrate the absence of any long-range ordering down to 56 mK. Analysis of the magnetization, susceptibility and specific heat measurements suggests that Ba3Yb(BO3)3 may realize a S = 1/2 quantum dipole lattice, in which the dominant interaction is the long range dipole-dipole coupling on the geometrically frustrated triangular lattice, and exchange interactions are subdominant or negligible.
Spectral Singularities, Biorthonormal Systems, and a Two-Parameter Family of Complex Point Interactions
Creators: name: Mostafazadeh, Ali
name: Mehri-Dehnavi, Hossein
Publisher: name: arXiv
Year: 2009
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A curious feature of complex scattering potentials v(x) is the appearance of spectral singularities. We offer a quantitative description of spectral singularities that identifies them with an obstruction to the existence of a complete biorthonormal system consisting of the eigenfunctions of the Hamiltonian operator, i.e., -\frac{d^2}{dx^2}+v(x), and its adjoint. We establish the equivalence of this description with the mathematicians' definition of spectral singularities for the potential v(x)=z_-δ(x+a)+z_+δ(x-a), where z_\pm and a are respectively complex and real parameters and δ(x) is the Dirac delta-function. We offer a through analysis of the spectral properties of this potential and determine the regions in the space of the coupling constants z_\pm where it admits bound states and spectral singularities. In particular, we find an explicit bound on the size of certain regions in which the Hamiltonian is quasi-Hermitian and examine the consequences of imposing PT-symmetry.
description: Published version, 33 pages, 11 figures
The Non-commutative Topological Vertex and Wall Crossing Phenomena
Creators: name: Nagao, Kentaro
name: Yamazaki, Masahito
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: Combinatorics (math.CO)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We propose a generalization of the topological vertex, which we call the "non-commutative topological vertex". This gives open BPS invariants for a toric Calabi-Yau manifold without compact 4-cycles, where we have D0/D2/D6-branes wrapping holomorphic 0/2/6-cycles, as well as D2-branes wrapping disks whose boundaries are on D4-branes wrapping non-compact Lagrangian 3-cycles. The vertex is defined combinatorially using the crystal melting model proposed recently, and depends on the value of closed string moduli at infinity. The vertex in one special chamber gives the same answer as that computed by the ordinary topological vertex. We prove an identify expressing the non-commutative topological vertex of a toric Calabi-Yau manifold X as a specialization of the closed BPS partition function of an orbifold of X, thus giving a closed expression for our vertex. We also clarify the action of the Weyl group of an affine A_L Lie algebra on chambers, and comment on the generalization of our results to the case of refined BPS invariants.
description: 33 pages, 10 figures
Humanitarian Intervention? Justice between Sovereignty and Human Rights: J. Habermas Versus C. Schmitt
Creators: name: Dr. Yoochul Lee
Publisher: name: Zenodo
Year: 2024
Subjects: Norms, Interventionism, Sovereignty, Non-aggression Pact, Ukraine War, Kosovo War.

description: Abstract

This study analyzes the humanitarian intervention in Kosovo through the perspectives of Habermas and Schmitt, underscoring its relevance to the ongoing war in Ukraine. It notes that while the Ukraine conflict is often viewed as indicative of the decline of U.S. hegemony, there is a paucity of in-depth theoretical discussion on its fundamental elements. The study emphasizes the tension arising from the duality of U.S. liberal norms (human rights protection versus intervention) and the conflict between human rights and state sovereignty. By using the concluded Kosovo case, it illustrates the dilemma of intervention for human rights protection, which closely mirrors the situation in Ukraine. The study contends that the primary issue lies in the conflict between human rights and sovereignty, as well as between intervention and protection, exposing the collapse of liberal norms and the philosophical foundations underlying the decline of U.S. hegemony. It highlights the importance of critically examining human rights and sovereignty within the broader context of the decline of U.S. hegemony and the rise of multipolarity, with the aim of identifying objectives for the emerging international order.
Josephson junction in cobalt-doped BaFe2As2 epitaxial thin films on (La, Sr)(Al, Ta)O3 bicrystal substrates
Creators: name: Katase, Takayoshi
name: Ishimaru, Yoshihiro
name: Tsukamoto, Akira
name: Hiramatsu, Hidenori
name: Kamiya, Toshio
name: Tanabe, Keiichi
name: Hosono, Hideo
Publisher: name: arXiv
Year: 2010
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Josephson junctions were fabricated in epitaxial films of cobalt-doped BaFe2As2 on [001]-tilt (La,Sr)(Al,Ta)O3 bicrystal substrates. 10m-wide microbridges spanning a 30-degrees-tilted bicrystal grain boundary (BGB bridge) exhibited resistively-shunted-junction (RSJ)-like current-voltage characteristics up to 17 K, and the critical current was suppressed remarkably by a magnetic field. Microbridges without a BGB did not show the RSJ-like behavior, and their critical current densities were 20 times larger than those of BGB bridges, confirming BGB bridges display a Josephson effect originating from weakly-linked BGB.