cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Computational models of consumer confidence from large-scale online attention data: crowd-sourcing econometrics
Creators: name: Dong, Xianlei
name: Bollen, Johan
Publisher: name: arXiv
Year: 2014
Subjects: subject: Computers and Society (cs.CY)
subject: FOS: Computer and information sciences

description: Economies are instances of complex socio-technical systems that are shaped by the interactions of large numbers of individuals. The individual behavior and decision-making of consumer agents is determined by complex psychological dynamics that include their own assessment of present and future economic conditions as well as those of others, potentially leading to feedback loops that affect the macroscopic state of the economic system. We propose that the large-scale interactions of a nation's citizens with its online resources can reveal the complex dynamics of their collective psychology, including their assessment of future system states. Here we introduce a behavioral index of Chinese Consumer Confidence (C3I) that computationally relates large-scale online search behavior recorded by Google Trends data to the macroscopic variable of consumer confidence. Our results indicate that such computational indices may reveal the components and complex dynamics of consumer psychology as a collective socio-economic phenomenon, potentially leading to improved and more refined economic forecasting.
description: 21 pages, 6 figures, 13 tables
Nation Branding Through a Mega-Event: A Case Study of Qatar 2022
Creators: name: Ahmed, Naeem
Publisher: name: Université d'Ottawa / University of Ottawa
Year: 2020
Subjects: Nation branding
Sport Mega Event
Brand

description: The purpose of this study was to investigate the nation branding process deployed by a host country organizing committee. Three research questions helped guide this study: (1) How does the organizing committee see the opportunity of hosting a sport-mega event (SME) as a nation branding tool? (2) What aspects of the FIFA World Cup (FWC) do people working with the organizing committee believe, create such nation branding opportunities? (3) How do event organizers leverage a nation branding legacy from the FWC? A single case study was built using 1,669 document pages, and nine semi-structured interviews and data were thematically analyzed. The study investigated relevant organizational documents and the event organizers’ perspectives to determine the nation branding processes. Results revealed the organization's approach to nation branding involved assessing their external image, creating a country narrative based on the population's characteristics and values, and depicting a unique identity by showcasing their cultural heritage to increase the attraction of the nation brand. Findings highlight that nation branding through the FWC requires the LOC’s strategic coordination through nation brand stakeholders, nation brand ambassadors, important organizations as well as the leadership of the nation in order to build brand equity.
Bringing In the New Year
Creators: name: Dooley, Brendan
Publisher: name: Zenodo
Year: 2022
Subjects: European
History
Chronology
news
newsletters
media

description: https://www.euronewsproject.org/2022/01/26/bringing-in-the-new-year/ Mediceo del Principato, vol. 2861. Unpaginated, but bound tightly enough so as not to confuse the order of pages. Leafing through, we find the order of pages seems somewhat idiosyncratic. Why is “From Bruxelles the 20th of December 1614” followed by “From Genoa, 9 January 1614," although the progression of dates up to 20 December otherwise seems perfectly chronological? Did the compiler of the volume blink while sorting and binding the pages? More probably, he sorted the pages according to early modern criteria regarding the start of the year– which did not always occur on the first of January! In fact, until the eighteenth century numerous systems were in use, of which we present a short list in this post.
Fluid driven fingering instability of a confined elastic meniscus
Creators: name: Biggins, J. S.
name: Wei, Z.
name: Mahadevan, L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: When a fluid is pumped into a cavity in a confined elastic layer, at a critical pressure, destabilizing fingers of fluid invade the elastic solid along its meniscus (Saintyves, Dauchot, and Bouchaud, 2013). These fingers occur without fracture or loss of adhesion and are reversible, disappearing when the pressure is decreased. We develop an asymptotic theory of pressurized highly elastic layers trapped between rigid bodies to explain these observations, with predictions for the critical fluid pressure for fingering, and the finger wavelength. We also show that the theory links this fluid-driven fingering with a similar transition driven instead by transverse stretching of the elastic layer. We further verify these predictions by using finite-element simulations on the two systems which show that, in both cases, the fingering transition is first-order (sudden) and hence has a region of bistability. Our predictions are in good agreement with recent observations of this elastic analog of the classical Saffman-Taylor interfacial instability in hydrodynamics.
Encuesta. Riesgo carcinogénico asociado al Arsénico en agua potable
Creators: name: Saucedo, Geovanna
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 329999
subject: Other biomedical and clinical sciences not elsewhere classified

description: Mediante muestreo a conveniencia se reclutaron 257 mujeres sanas, mayores de 18 años, residentes de domicilios cercanos a pozos (5 km a la redonda22 con niveles de As >0.010 mg/L; se obtuvo información de antropometría, consumo de agua diario y nivel socioeconómico.
Stable and mobile excited two-dimensional dipolar Bose-Einstein condensate solitons
Creators: name: Adhikari, S. K.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We demonstrate robust, stable, mobile excited states of quasi-two-dimensional (quasi-2D) dipolar Bose-Einstein condensate (BEC) solitons for repulsive contact interaction with a harmonic trap along the $x$ direction perpendicular to the polarization direction $z$. Such a soliton can freely move in the y-z plane. A rich variety of such excitations is considered: one quanta of excitation for movement along (i) y axis or (ii) z axis or (ii) both. A proposal for creating these excited solitonic states in a laboratory by phase imprinting is also discussed. We also consider excited states of quasi-2D dipolar BEC soliton where the sign of the dipolar interaction is reversed by a rotating orienting field. In this sign-changed case the soliton moves freely in the x-y plane under the action of a harmonic trap in the $z$ direction. At medium velocity the head-on collision of two such solitons is found to be quasi elastic with practically no deformation. The findings are illustrated using numerical simulation in three and two spatial dimensions employing realistic interaction parameters for a dipolar $^{164}$Dy BEC.
Charge-Trapping-Induced Compensation of the Ferroelectric Polarization in FTJs: Optimal Conditions for a Synaptic Device Operation
Creators: name: Fontanini, R.
name: Segatto, M.
name: Nair, K. S.
name: Holzer, M.
name: Driussi, F.
name: Häusler, I.
name: Koch, C. T.
name: Dubourdieu, C.
name: Deshpande, V.
name: Esseni, D.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Applied Physics (physics.app-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In this work, we present a clear evidence, based on numerical simulations and experiments, that the polarization compensation due to trapped charge strongly influences the ON/ OFF ratio in Hf 0.5 Zr 0.5 O 2 (HZO)-based ferroelectric tunnel junctions (FTJs). Furthermore, we identify and explain compensation conditions that enable an optimal operation of FTJs. Our results provide both key physical insights and design guidelines for the operation of FTJs as multilevel synaptic devices.
Coulomb drag of viscous electron fluids: drag viscosity and negative drag conductivity
Creators: name: Hasdeo, Eddwi H.
name: Idrisov, Edvin G.
name: Schmidt, Thomas L.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We show that Coulomb drag in hydrodynamic bilayer systems leads to additional viscosity terms in the hydrodynamic equations, i.e., the drag and drag-Hall viscosities, besides the well-known kinematic and Hall viscosities. These new viscosity terms arise from a change of the stress tensor due to the interlayer Coulomb interactions. All four viscosity terms are tunable by varying the applied magnetic field and the electron densities in the two layers. At certain ratios between the electron densities in the two layers, the drag viscosity dramatically changes the longitudinal transport resulting in a negative drag conductivity.
description: 4 pages + Appendix, 4 figures
A Topological Investigation of Phase Transitions of Cascading Failures in Power Grids
Creators: name: Koç, Yakup
name: Warnier, Martijn
name: Van Mieghem, Piet
name: Kooij, Robert E.
name: Brazier, Frances M. T.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: Cascading failures are one of the main reasons for blackouts in electric power transmission grids. The economic cost of such failures is in the order of tens of billion dollars annually. The loading level of power system is a key aspect to determine the amount of the damage caused by cascading failures. Existing studies show that the blackout size exhibits phase transitions as the loading level increases. This paper investigates the impact of the topology of a power grid on phase transitions in its robustness. Three spectral graph metrics are considered: spectral radius, effective graph resistance and algebraic connectivity. Experimental results from a model of cascading failures in power grids on the IEEE power systems demonstrate the applicability of these metrics to design/optimize a power grid topology for an enhanced phase transition behavior of the system.
GHOSTS FROM THE PAST! or, BRAM STOKER'S ARMADA
Creators: name: Dooley, Brendan
Publisher: name: Zenodo
Year: 2022
Subjects: Bram Stoker
Cyphers
Cryptology
Armada
Spain
History
1588

description: https://www.euronewsproject.org/2022/07/08/ghosts-from-the-past-or-bram-stokers-armada/ Who has not heard of Dracula, gothic classic of vampire lore par excellence? What about The Mystery of the Sea? The latter book by the same author received far less acclaim. To be sure, books were not this Irish author’s only stock in trade. By the time Bram Stoker published his famous work he was already nearing the end of a long mostly unrelated career in theater promotion and management which had brought him in contact with English as well as American high society. As a writer, his experience also included theater reviews for a Dublin newspaper. Arguably, all these aspects, and much else besides, find their way somehow into the novels; but that is not our concern here.
The growth bound for strongly continuous semigroups on Fréchet spaces
Creators: name: Wegner, Sven-Ake
Publisher: name: arXiv
Year: 2014
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary 47D06, Secondary 46A04, 34G10

description: We introduce the concepts of growth and spectral bound for strongly continuous semigroups acting on Fréchet spaces and show that the Banach space inequality $s(A)\leqslantω_0(T)$ extends to the new setting. Via a concrete example of an even uniformly continuous semigroup we illustrate that for Fréchet spaces effects with respect to these bounds may happen that cannot occur on a Banach space.
description: 6 pages
A new method for characterizing and forecasting the evolution of slope moviments
Creators: name: Scoppettuolo, Maria Rosaria
Publisher: name: Universita degli studi di Salerno
Year: 2021
Subjects: subject: ICAR/07 GEOTECNICA
subject: Landslides
subject: Forecasting
subject: Failure

description: 2018 - 2019
description: Characterizing and forecasting the evolution of slope movements are highly studied topics due to the possible consequences of landslides on buildings, infrastructures and in terms of loss of life. The international scientific literature provides detailed analysis and modelling of specific phenomena, whereas a generalized procedure aimed at identifying common properties of landslides is lacking. In this thesis a general framework for understanding typical behaviours of slope movements is presented, with the aim of classifying stages of activity of landslides and predicting their time evolution. For this purpose, monitoring displacement data are collected for several case studies from literature that differ in materials, geometry and triggering factors. These data are analysed referring to single activity stages, selected on the basis of geometric properties of data series and on variations of triggering causes. Thereafter, displacement dimensionless diagrams are constructed, allowing the identification of some trends, each characterized by common growth properties related only to the evolutive stage not depending on the specific characteristics in terms of dimensions, geometry, materials and so on. Dimensionless trends are analysed through the derivatives of displacement function up to the third order, namely velocity, acceleration and jerk. Sign and growth properties of derivatives allow identifying common characteristics in the evolution of landslides. Hence, an appropriate interpolating function of displacement data is introduced in order to develop a forecasting algorithm able to establish alert levels useful in early warning systems. This procedure is applied to the cases from literature and to La Saxe rockslide (Courmayeur, Valle d’Aosta, Italy) for which continuous monitoring data are available with a sampling frequency of one hour. Dimensionless trends are obtained in terms of displacements, velocities, accelerations and jerks, showing a satisfying correlation with actual time evolution of landslide motions. In addition the forecasting algorithm is applied to an important failure that locally involved La Saxe rockslide and to some instabilities in an open pit mine, showing the capability of the method in establishing useful alert levels. [edited by Author]
Local Multi-Label Explanations for Random Forest
Creators: name: Mylonas, Nikolaos
name: Mollas, Ioannis
name: Bassiliades, Nick
name: Tsoumakas, Grigorios
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: I.2.0; I.2.6

description: Multi-label classification is a challenging task, particularly in domains where the number of labels to be predicted is large. Deep neural networks are often effective at multi-label classification of images and textual data. When dealing with tabular data, however, conventional machine learning algorithms, such as tree ensembles, appear to outperform competition. Random forest, being a popular ensemble algorithm, has found use in a wide range of real-world problems. Such problems include fraud detection in the financial domain, crime hotspot detection in the legal sector, and in the biomedical field, disease probability prediction when patient records are accessible. Since they have an impact on people's lives, these domains usually require decision-making systems to be explainable. Random Forest falls short on this property, especially when a large number of tree predictors are used. This issue was addressed in a recent research named LionForests, regarding single label classification and regression. In this work, we adapt this technique to multi-label classification problems, by employing three different strategies regarding the labels that the explanation covers. Finally, we provide a set of qualitative and quantitative experiments to assess the efficacy of this approach.
description: 11 pages, 1 figues, 8 tables, submitted to XKDD (workshop of ECML PKDD 2022)
Sub-micron spin-based magnetic field imaging with an organic light emitting diode
Creators: name: Geng, Rugang
name: Mena, Adrian
name: Pappas, William J.
name: McCamey, Dane R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Quantum sensing and imaging of magnetic fields has attracted broad interests due to its potential for high sensitivity and spatial resolution. Common systems used for quantum sensing require either optical excitation (e.g., nitrogen-vacancy centres in diamond, atomic vapor magnetometers), or cryogenic temperatures (e.g., SQUIDs, superconducting qubits), which pose challenges for chip-scale integration and commercial scalability. Here, we demonstrate an integrated organic light emitting diode (OLED) based quantum sensor for magnetic field imaging, which employs spatially resolved magnetic resonance to provide a robust mapping of magnetic fields. By considering the monolithic OLED as an array of individual virtual sensors, we achieve sub-micron magnetic field mapping with field sensitivity of ~160 $μ$T Hz$^{-1/2}$ um$^{-2}$. Our work demonstrates a chip-scale OLED-based laser free magnetic field sensor and an approach to magnetic field mapping built on a commercially relevant and manufacturable technology.
Theory of a quodon gas. With application to precipitation kinetics in solids under irradiation
Creators: name: Dubinko, Vladimir
name: Shapovalov, Roman
Publisher: name: arXiv
Year: 2014
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Rate theory of the radiation-induced precipitation in solids is modified with account of non-equilibrium fluctuations driven by the gas of lattice solitons (a.k.a. quodons) produced by irradiation. According to quantitative estimations, a steady-state density of the quodon gas under sufficiently intense irradiation can be as high as the density of phonon gas. The quodon gas may be a powerful driver of the chemical reaction rates under irradiation, the strength of which exponentially increases with irradiation flux and may be comparable with strength of the phonon gas that exponentially increases with temperature. The modified rate theory is applied to modelling of copper precipitation in FeCu binary alloys under electron irradiation. In contrast to the classical rate theory, which disagrees strongly with experimental data on all precipitation parameters, the modified rate theory describes quite well both the evolution of precipitates and the matrix concentration of copper measured by different methods
description: V. Dubinko, R. Shapovalov, Theory of a quodon gas. With application to precipitation kinetics in solids under irradiation. (Springer International Publishing, Switzerland, 2014)
HAGRID -- High Accuracy GRB Rapid Inference with Deep learning
Creators: name: Kole, Merlin
name: Koziol, Gilles
name: Droz, David
Publisher: name: arXiv
Year: 2023
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Since their discoveries in 1967, Gamma-Ray Bursts (GRBs) continue to be one of the most researched objects in astrophysics. Multi-messenger observations are key to gaining a deeper understanding of these events. In order to facilitate such measurements, fast and accurate localization of the gamma-ray prompt emission is required. As traditional localization techniques are often time consuming or prone to significant systematic errors, here we present a novel method which can be applied on the POLAR-2 observatory. POLAR-2 is a dedicated GRB polarimeter, which will be launched towards the China Space Station (CSS) in 2025. The CSS provides POLAR-2 access to a GPU, which makes it possible and advantageous to run a Deep Learning model on it. In this work, we explore the possibility to identify GRBs in real time and to infer their location and spectra with deep learning models. Using POLAR simulations and data, a feasibility experiment was performed to implement this method on POLAR-2. Our results indicate that using this method, in combination with real time data downlinking capabilities, POLAR-2 will be able to provide accurate localization alerts within 2 minutes of the GRB onset.
description: Proceeding from the 38th International Cosmic Ray Conference (ICRC2023), 8 pages
Open system control of dynamical transitions under the generalized Kruskal-Neishtadt-Henrard theorem
Creators: name: Fieguth, Diego M.
name: Anglin, James R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Useful dynamical processes often begin through barrier-crossing dynamical transitions; engineering system dynamics in order to make such transitions reliably is therefore an important task for biological or artificial microscopic machinery. Here we first show by example that adding even a small amount of back-reaction to a control parameter, so that it responds to the system's evolution, can significantly increase the fraction of trajectories that cross a separatrix. We then explain how a post-adiabatic theorem due to Neishtadt can quantitatively describe this kind of enhancement without having to solve the equations of motion, allowing systematic understanding and design of a class of self-controlling dynamical systems.
Steering matter wave superradiance with an ultra-narrowband optical cavity
Creators: name: Keßler, H.
name: Klinder, J.
name: Wolke, M.
name: Hemmerich, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A superfluid atomic gas is prepared inside an optical resonator with an ultra-narrow band width on the order of the single photon recoil energy. When a monochromatic off-resonant laser beam irradiates the atoms, above a critical intensity the cavity emits superradiant light pulses with a duration on the order of its photon storage time. The atoms are collectively scattered into coherent superpositions of discrete momentum states, which can be precisely controlled by adjusting the cavity resonance frequency. With appropriate pulse sequences the entire atomic sample can be collectively accelerated or decelerated by multiples of two recoil momenta. The instability boundary for the onset of matter wave superradiance is recorded and its main features are explained by a mean field model.
description: Article & Supplement, 4 figures, to appear in Phys. Rev. Lett. (2014)
A candidate relativistic tidal disruption event at 340 Mpc
Creators: name: Somalwar, Jean J.
name: Ravi, Vikram
name: Dong, Dillon Z.
name: Chen, Yuyang
name: Breen, Shari
name: Chandra, Poonam
name: Clarke, Tracy
name: De, Kishalay
name: Gaensler, B. M.
name: Hallinan, Gregg
name: Laha, Sibasish
name: Law, Casey
name: Myers, Steven T.
name: Parsotan, Tyler
name: Peters, Wendy
name: Polisensky, Emil
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present observations of an extreme radio flare, VT J024345.70-284040.08, hereafter VT J0243, from the nucleus of a galaxy with evidence for historic Seyfert activity at redshift $z=0.074$. Between NRAO VLA Sky Survey observations in 1993 to VLA Sky Survey observations in 2018, VT J0243 rose from a ${\sim}$GHz radio luminosity of $νL_ν\lesssim 10^{38}$ erg s$^{-1}$ to $νL_ν{\sim}10^{40}$ erg s$^{-1}$, and still continues to brighten. The radio spectral energy distribution (SED) evolution is consistent with a nascent jet that has slowed over ${\sim}3000$ days with an average $0.1 < \langle β\rangle < 0.6$. The jet is energetic (${\sim}10^{51-52}$ erg), and had a radius ${\sim}0.7$ pc in Dec. 2021. X-ray observations suggest a persistent or evolving corona, possibly associated with an accretion disk, and IR and optical observations constrain any high-energy counterpart to be sub-Eddington. VT J0243 may be an example of a young, off-axis radio jet from a slowly evolving tidal disruption event. Other more mysterious triggers for the accretion enhancement and jet launching are possible. In either case, VT J0243 is a unique example of a nascent jet, highlighting the unknown connection between supermassive black holes, the properties of their accretion flows, and jet launching.
description: 20 pages, 5 figures, 3 tables. Submitted to ApJ
Negative Mass Black Holes in de-Sitter Space
Creators: name: Hull, Brayden R.
name: Mann, Robert B.
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that asymptotically de Sitter black holes of negative mass can exist in Lovelock gravity. Such black holes have horizon geometries with non-constant curvature and are known as Exotic Black Holes. We explicitly examine the case of Gauss-Bonnet gravity. We briefly discuss the positive mass case where we show how the transverse space geometry affects whether a black hole will exist or not.For negative mass solutions we shown how three different black hole spacetimes are possible depending on the transverse space geometry. We also provide closed form expressions for the geometric parameters to ensure that a black hole spacetime is observed. We close with a discussion of the massless case, where there are many different spacetimes that are permitted.
description: 12 pages, 5 figures
Tools used in Naturalistic Decision Making (NDM) and in Resilience Engineering (RE)
Creators: name: Klein, Gary
name: Hegde, Sudeep
Publisher: name: Zenodo
Year: 2020

description: This memo contains an initial listing of NDM and RE tools, for use by practitioners and colleagues. The memo is intended merely as a quick survey, and not an exhaustive list. By “tool,” we mean something you can use to get a job done.
The Size of Star Clusters Accreted by the Milky Way
Creators: name: Miholics, Meghan
name: Webb, Jeremy J.
name: Sills, Alison
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We perform N-body simulations of a cluster that forms in a dwarf galaxy and is then accreted by the Milky Way to investigate how a cluster's structure is affected by a galaxy merger. We find that the cluster's half mass radius will respond quickly to this change in potential. When the cluster is placed on an orbit in the Milky Way with a stronger tidal field the cluster experiences a sharp decrease in size in response to increased tidal forces. Conversely, when placed on an orbit with a weaker tidal field the cluster expands since tidal forces decrease and stars moving outwards due to internal effects remain bound at further distances than before. In all cases, we find that the cluster's half mass radius will eventually be indistinguishable from a cluster that has always lived in the Milky Way on that orbit. These adjustments occur within 1-2 half mass relaxation times of the cluster in the dwarf galaxy. We also find this effect to be qualitatively independent of the time that the cluster is taken from the dwarf galaxy. In contrast to the half mass radius, we show the core radius of the cluster is not affected by the potential the cluster lives in. Our work suggests that structural properties of accreted clusters are not distinct from clusters born in the Milky Way. Other cluster properties, such as metallicity and horizontal branch morphology, may be the only way to identify accreted star clusters in the Milky Way.
description: 7 pages, 6 figures, Accepted for publication MNRAS
Kastriotët dhe Raguza
Creators: name: Malaj, Edmond
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 430399
subject: Historical studies not elsewhere classified

description: In this paper, the focus of the research is the relations of the Kastrioti family
with the Republic of Ragusa. Mainly, we were focused on Scanderbeg's period,
because during this time there was a greater intensity of relations, and from the
other part they are better recorded, nonetheless, the relations of the Kastrioti family
with Ragusa began at the time of Gjon Kastrioti. On other earlier relations,
we do not have any data. This research is divided into some parts, also more
detailed are the diplomatic and economic-trade questions. This research is
mainly based on archival documents, but except them, are also taken into
consideration different studies.
Changes in the demand for CSR activities and stakeholder engagement based on research conducted among public relations specialists in Poland, with consideration of the SARS-COV-2 pandemic
Creators: name: Tworzydło, Dariusz
Publisher: name: figshare
Year: 2022
Subjects: subject: 200104 Media Studies
subject: FOS: Media and communications

description: Care for the external and internal environment of the company, ethics and human resources, as well as the organizational culture, is a crucial element for the importance and competitive advantage of the company. It was especially noticeable during the SARS-COV-2 pandemic. Companies began to grapple with difficulties, which contributed to an increased interest in crisis management competencies. The pandemic has permanently changed the functioning of society and the image of many industries, including public relations. The analysis of changes in the demand of companies for CSR-related activities after the pandemic becomes a valuable element of the direction of innovative research. Recognizing the interest, these aspects of the com?pany were verified. The article uses data obtained in the course of the implementa?tion of three independent research projects realized in Poland. The first study concerned crisis management from the perspective of a public relations agencies. The structures of the offer of public relations services (including CSR strategies) were examined. The responses of some public relations specialists regarding CSR and activities in this area after the COVID-19 pandemic were extracted from the second research project. The last, third project involved specialists employed in PR agencies. The research area covered changes in the demand of companies for CSR-related activities after the pandemic and the desired areas of training and personal develop?ment, with particular emphasis on CSR. The common denominator of all three pro?jects is CSR campaigns and the way they are implemented by PR specialis
A spin-adapted Density Matrix Renormalization Group algorithm for quantum chemistry
Creators: name: Sharma, Sandeep
name: Chan, Garnet Kin-Lic
Publisher: name: arXiv
Year: 2014
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We extend the spin-adapted density matrix renormalization group (DMRG) algorithm of McCulloch and Gulacsi [Europhys. Lett.57, 852 (2002)] to quantum chemical Hamiltonians. This involves two key modifications to the non-spin-adapted DMRG algorithm: the use of a quasi-density matrix to ensure that the renormalised DMRG states are eigenvalues of $S^2$ , and the use of the Wigner-Eckart theorem to greatly reduce the overall storage and computational cost. We argue that the advantages of the spin-adapted DMRG algorithm are greatest for low spin states. Consequently, we also implement the singlet-embedding strategy of Nishino et al [Phys. Rev. E61, 3199 (2000)] which allows us to target high spin states as a component of a mixed system which is overall held in a singlet state. We evaluate our algorithm on benchmark calculations on the Fe$_2$S$_2$ and Cr$_2$ transition metal systems. By calculating the full spin ladder of Fe$_2$S$_2$ , we show that the spin-adapted DMRG algorithm can target very closely spaced spin states. In addition, our calculations of Cr$_2$ demonstrate that the spin-adapted algorithm requires only roughly half the number of renormalised DMRG states as the non-spin-adapted algorithm to obtain the same accuracy in the energy, thus yielding up to an order of magnitude increase in computational efficiency.
Accurate Hellmann-Feynman forces from density functional calculations with augmented Gaussian basis sets
Creators: name: Pathak, Shivesh
name: López, Ignacio Ema
name: Lee, Alex J.
name: Bricker, William P.
name: Fernández, Rafael López
name: Lehtola, Susi
name: Rackers, Joshua A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The Hellmann-Feynman (HF) theorem provides a way to compute forces directly from the electron density, enabling efficient force calculations for large systems through machine learning (ML) models for the electron density. The main issue holding back the general acceptance of the HF approach for atom-centered basis sets is the well-known Pulay force which, if naively discarded, typically constitutes an error upwards of 10 eV/Ang in forces. In this work, we demonstrate that if a suitably augmented Gaussian basis set is used for density functional calculations, the Pulay force can be suppressed and HF forces can be computed as accurately as analytical forces with state-of-the-art basis sets, allowing geometry optimization and molecular dynamics to be reliably performed with HF forces. Our results pave a clear path forwards for the accurate and efficient simulation of large systems using ML densities and the HF theorem.
Estimation of bias-corrected intraclass correlation coefficient for unbalanced clustered studies with continuous outcomes
Creators: name: Shan, Guogen
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Medicine
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 19999 Mathematical Sciences not elsewhere classified
subject: FOS: Mathematics
subject: Cancer
subject: Science Policy
subject: Plant Biology

description: Intraclass correlation coefficient for data in a clustered study is traditionally estimated from a one-way random-effects model. This model assumes normality for the random cluster effect and the residual effect. When the normality assumption is questionable, we find that the estimated correlation could be much below the nominal level when data are highly skewed or data have low kurtosis. We develop a bias-corrected estimator based on the approach by Thomas and Hultquist for a study with unbalanced cluster sizes. For multivariate normal data or non-normal data with moderate skewness, we compare the performance of the new bias-corrected estimator with two existing estimators with regards to accuracy and precision. When correlation is small, the existing ANOVA estimator works well. When correlation is medium to large, the proposed new estimator has the correlation close to the nominal level, and its mean squared error is smaller than others.
TINTORETTO ATTRACTS A CROWD
Creators: name: Dooley, Brendan
name: Di Carlo, Andrea
Publisher: name: Zenodo
Year: 2022
Subjects: Tintoretto
Painting
Venice
News
Media
newsletters
Renaissance

description: https://www.euronewsproject.org/2022/02/20/tintoretto-attracts-a-crowd/ It was a busy week in Venice. According to the newsletter of 7 March 1592, celebrations were being held here in honor of the newly elected pope; meanwhile, a Veronese person was being executed for desecration of a sacred object; also, a major sailing vessel with its contents worth 90,000 ducats was saved from the Uskok pirates. What catches our eye? How about this: “This week in the Hall of the Grand Council above the throne of the Most Serene Prince was revealed the “Paradise” done by the hand of the famous painter Tintoretto, and there came a great crowd of people to see this, which was judged to be one of the most beautiful works in all of Italy considering the mastery demonstrated in that painting.”
Quantum chaos and thermalization in the two-mode Dicke model
Creators: name: Kirkova, Aleksandrina V.
name: Ivanov, Peter A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We discuss the onset of quantum chaos and thermalization in the two-mode Dicke model, which describes the dipolar interaction between an ensemble of spins and two bosonic modes. The two-mode Dicke model exhibits normal to superradiant quantum phase transition with spontaneous breaking either of a discrete or continuous symmetry. We study the behaviour of the fidelity out-of-time-order correlator derived from the Loschmidt echo signal in the quantum phases of the model and show that its exponential growth cannot be related to a classical unstable point in the general case. Moreover, we find that the collective spin observable in the two-mode Dicke model quickly saturates to its long-time average value, and shows very good agreement between its diagonal ensemble average and microcanonical average even for a small number of spins. We show that the temporal fluctuations of the expectation value of the collective spin observable around its average are small and decrease with the effective system size, which leads to thermalization of the spin system.
description: 8 pages, 6 figures, (v2) updated appendix
The Penn State - Torun Centre for Astronomy Planet Search stars. II. Lithium abundance analysis of the Red Giant Clump sample
Creators: name: Adamow, M.
name: Niedzielski, A.
name: Villaver, E.
name: Wolszczan, A.
name: Nowak, G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Using the sample of 348 stars from the PennState-Torun Centre for Astronomy Planet Search, for which uniformly determined atmospheric parameters are available, with chemical abundances and rotational velocities presented here, we investigate various channels of Li enrichment in giants. Our work is based on the HET/HRS spectra. The A(Li) was determined from the 670.8nm line, while we use a more extended set of lines for alpha-elements abundances. In a series of K-S tests, we compare Li-rich giants with other stars in the sample. We also use available IR photometric and kinematical data in search for evidence of mass-loss. We investigate properties of the most Li-abundant giants in more detail by using multi-epoch precise radial velocities. We present Li and alpha-elements abundances, as well as vsini for 348 stars. We detected Li in 92 stars, of which 82 are giants. 11 of them show significant Li abundance A(Li)>1.4 and 7 of them are Li-overabundant objects, according to criterion of A(Li)>1.5 and their location on HR diagram, including two giants with Li abundances close to meteoritic level. For another 271 stars, upper limits of A(Li) are presented. We show that Li-rich giants are among the most massive stars from our sample and show larger than average effective temperatures. They are indistinguishable from the complete sample in terms of their distribution of luminosity, [Fe/H], vsini, and alpha-elements abundances. Our results do not point out to one specific Li enrichment mechanism operating in our sample of giants. On the contrary, in some cases, we cannot identify fingerprints of any of known scenarios. We show, however, that the 4 most Li-rich giant in our sample either have low-mass companions or have RV variations at the level of ~100 m/s, which strongly suggests that the presence of companions is an important factor in the Li-enrichment processes in giants.
description: Accepted for publication in A&A, 13 figures, 11 tables, 26 pages
Systematic Atomic Structure Datasets for Machine Learning Potentials: Application to Defects in Magnesium
Creators: name: Poul, Marvin
name: Huber, Liam
name: Bitzek, Erik
name: Neugebauer, Jörg
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We present a physically motivated strategy for the construction of training sets for transferable machine learning interatomic potentials. It is based on a systematic exploration of all possible space groups in random crystal structures, together with deformations of cell shape, size, and atomic positions. The resulting potentials turn out to be unbiased and generically applicable to studies of bulk defects without including any defect structures in the training set or employing any additional Active Learning. Using this approach we construct transferable potentials for pure Magnesium that reproduce the properties of hexagonal closed packed (hcp) and body centered cubic (bcc) polymorphs very well. In the process we investigate how different types of training structures impact the properties and the predictive power of the resulting potential.
D3.6 Terms of reference for SIS regulator
Creators: name: Rodrigues, Rowena
name: Macnish, Kevin
name: Antoniou, Josephina
name: Wright, David
Publisher: name: De Montfort University
Year: 2020
Subjects: subject: 109999 Technology not elsewhere classified
subject: FOS: Other engineering and technologies

description: The report explores the feasibility of a bespoke/new regulator for AI and big data at the EU and/or Member State levels. The report assesses the factors indicating the need for such a regulator, its mandate, and how it would fit or interact with existing regulatory bodies and structures. Pros and cons, and challenges are identified. The report proposes terms of reference for a European Agency for AI.
D2.4 Delphi study report
Creators: name: Santiago, Nicole
name: Stahl, Bernd
name: Keene, Paul
name: Tally Hatzakis
name: Rodrigues, Rowena
name: Wright, David
Publisher: name: De Montfort University
Year: 2020
Subjects: subject: 109999 Technology not elsewhere classified
subject: FOS: Other engineering and technologies

description: This deliverable describes a three-stage Delphi study undertaken by the SHERPA consortium. It provides the justification for choosing a Delphi study and explains the process of developing the research instrument and the selection of participants. Each of the three stages of the Delphi study is described in detail. Data is presented and analysed and overall conclusions are drawn.
Gamma/hadron segregation for a ground based imaging atmospheric Cherenkov telescope using machine learning methods: Random Forest leads
Creators: name: Sharma, Mradul
name: Nayak, J.
name: Koul, M. K.
name: Bose, S.
name: Mitra, Abhas
Publisher: name: arXiv
Year: 2014
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: A detailed case study of $γ$-hadron segregation for a ground based atmospheric Cherenkov telescope is presented. We have evaluated and compared various supervised machine learning methods such as the Random Forest method, Artificial Neural Network, Linear Discriminant method, Naive Bayes Classifiers,Support Vector Machines as well as the conventional dynamic supercut method by simulating triggering events with the Monte Carlo method and applied the results to a Cherenkov telescope. It is demonstrated that the Random Forest method is the most sensitive machine learning method for $γ$-hadron segregation.
description: Accepted to RAA
Capitalismo e ideologie della libertà. La libertà oltre il capitale
Creators: name: Lamattina, Vanessa
Publisher: name: Universita degli studi di Salerno
Year: 2017
Subjects: subject: SPS/07 SOCIOLOGIA GENERALE
subject: Capitalismo
subject: Libertà
subject: Ideologia

description: 2015 - 2016
description: To survive and expand, capitalism has always needed an ideology that would support its project. This was clear for thinkers such as Tönnies, Simmel, Weber, and Sombart who analyzed the transition from traditional to modern society, reflected on the birth of the new capitalist Geist and described the ways of 'imbibing' the societies. The thinker who has deepened the process of widespread diffusion of capitalist rationality and understood how the conception of liberty advocated by the liberals succeeded in settling insistently in our existences is surely Marx. The use of Marxian theory (and successive Marxist theories) on ideology has enabled us to highlight both the rise of an ever-growing capitalism in societies and the shadows of a Marxism increasingly weakened by its winning charge. After describing the changes made in societies following the explosion of consumerism, we have mapped out the framework of the neoliberal theoretical system, capable of further radicalizing the concept of freedom, now becoming 'market freedom'. According to this, individual freedom is at the maximum of profit and inevitably strides with the principle of equality. Our intent therefore becomes to show the existence of a concept of alternative freedom, in which the relationship between freedom and equality is possible. Starting from this assumption and referring primarily to the Gramsci concept of ‘guerra di posizione’, we reflect on the forms of resistance designed over the years and on the possibility of creating new ones by following the ‘Gramsciano model’. [edited by author]
Two inequalities on the areal Mahler measure
Creators: name: Choi, Stephen K. K.
name: Samuels, Charles L.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11C08, 11G50 (Primary)

description: Recent work of Pritsker defines and studies an areal version of the Mahler measure. We further explore this function with a particular focus on the case where its value is small, as this is most relevant to Lehmer's conjecture. In this situation, we provide improvements to two inequalities established in Pritsker's original paper.
Data-Driven Energy Levels Calculation of Neutral Ytterbium ($Z$ = 70)
Creators: name: Yu, Yushu
name: Yang, Chen
name: Jiang, Gang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: In view of the difficulty in calculating the atomic structure parameters of high-$Z$ elements, the HFR (Hartree-Fock with relativistic corrections) theory in combination with the ridge regression (RR) algorithm rather than the Cowan code's least squares fitting (LSF) method is proposed and applied. By analyzing the energy level structure parameters of the HFR theory and using the fitting experimental energy level extrapolation method, some excited state energy levels of the {Yb~I} ($Z=70$) atom including the $4f$ open shell are calculated. The advantages of the ridge regression algorithm are demonstrated by comparing it with Cowan's least squares results. In addition, the results obtained by the new method are compared with the experimental results and other theoretical results to demonstrate the reliability and accuracy of our approach.