cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Core mass -- halo mass relation of bosonic and fermionic dark matter halos harbouring a supermassive black hole
Creators: name: Chavanis, Pierre-Henri
Publisher: name: arXiv
Year: 2019
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the core mass -- halo mass relation of bosonic dark matter halos, in the form of self-gravitating Bose-Einstein condensates, harbouring a supermassive black hole. We use the ``velocity dispersion tracing'' relation according to which the velocity dispersion in the core $v_c^2\sim GM_c/R_c$ is of the same order as the velocity dispersion in the halo $v_h^2\sim GM_h/r_h$ (this relation can be justified from thermodynamical arguments) and the approximate analytical mass-radius relation of the quantum core in the presence of a central black hole obtained in our previous paper [P.H. Chavanis, Eur. Phys. J. Plus 134, 352 (2019)]. For a given minimum halo mass $(M_h)_{\rm min}\sim 10^8\, M_{\odot}$ determined by the observations, the only free parameter of our model is the scattering length $a_s$ of the bosons (their mass $m$ is then determined by the characteristics of the minimum halo). For noninteracting bosons and for bosons with a repulsive self-interaction, we find that the core mass $M_c$ increases with the halo mass $M_h$ and achieves a maximum value $(M_c)_{\rm max}$ at some halo mass $(M_h)_{*}$ before decreasing. The whole series of equilibria is stable. For bosons with an attractive self-interaction, we find that the core mass achieves a maximum value $(M_c)_{\rm max}$ at some halo mass $(M_h)_{*}$ before decreasing. The series of equilibria becomes unstable above a maximum halo mass $(M_h)_{\rm max}\ge (M_h)_{*}$. In the absence of black hole $(M_h)_{\rm max}=(M_h)_{*}$. At that point, the quantum core (similar to a dilute axion star) collapses. We perform a similar study for fermionic dark matter halos. We find that they behave similarly to bosonic dark matter halos with a repulsive self-interaction, the Pauli principle for fermions playing the role of the repulsive self-interaction for bosons.
Transport-induced suppression of nuclear field fluctuations in multi-quantum-dot systems
Creators: name: Qvist, Jørgen Holme
name: Danon, Jeroen
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Magnetic noise from randomly fluctuating nuclear spin ensembles is the dominating source of decoherence for many multi-quantum-dot multielectron spin qubits. Here we investigate in detail the effect of a DC electric current on the coupled electron-nuclear spin dynamics in double and triple quantum dots tuned to the regime of Pauli spin blockade. We consider both systems with and without significant spin-orbit coupling and find that in all cases the flow of electrons can induce a process of dynamical nuclear spin polarization that effectively suppresses the nuclear polarization gradients over neighboring dots. Since exactly these gradients are the components of the nuclear fields that act harmfully in the qubit subspace, we believe that this presents a straightforward way to extend coherence times in multielectron spin qubits by at least one order of magnitude.
description: 14 pages, 8 figures
Le opinioni degli utenti rilevate sui siti di attrazione turistica del territorio siciliano valutate con la Content Analysis
Creators: name: Avena, Giuseppe
Publisher: name: Humanities
Year: 2022

description: Già da alcuni anni il settore turistico sta vivendo dei cambiamenti sostanziali riguardanti il differente approccio, rispetto al passato, nella conoscenza dei luoghi e nelle prenotazioni delle strutture ricettive. L’artefice di questa rivoluzione è stato il web 2.0 che ha permesso di passare da un turismo tradizionale al Travel 2.0. Grazie alla rivoluzione digitale si è assistito ad un incremento del passaparola on-line tra i consumatori, portando così allo sviluppo delle recensioni e dei feedback on-line. In ambito turistico questa forma di passaparola si è sviluppata con la creazione di siti ad hoc riguardanti i commenti dei viaggiatori e dei consumatori sui luoghi visitati, sulle strutture ricettive e gastronomiche. L’analisi delle recensioni presenti su questi siti permette di conoscere i loro gusti, le loro impressioni, i suggerimenti, gli aspetti positivi e negativi del servizio offerto, influenzando col passaparola digitale la visibilità e l’appetibilità di una struttura turistica. Per tali motivazioni e per delineare l’andamento del turismo in Sicilia si sono analizzati i commenti dei viaggiatori del 2017 sul principale sito, scelto in quanto ha avuto il maggior sviluppo, di rating on-line che è TripAdvisor. L’obiettivo che ci si è posto è stato quello di osservare le recensioni dei visitatori che si sono recati in Sicilia e di cercare di comprendere quanto sia appetibile, in senso positivo o negativo, il settore alberghiero regionale. Partendo dall’evoluzione del fenomeno turistico, ponendo l’attenzione sulla situazione del turismo in Sicilia, si è pervenuti attraverso lo studio e l’analisi fattiva, descrivendo il processo di interpretazione dei commenti, alla conoscenza di quali siano le argomentazioni che influenzano maggiormente la scelta di una struttura ricettiva nrispetto ad un'altra e laconseguente valutazione che a questa viene assegnata dai viaggiatori.
description: Humanities, V. 10, N. 2 (2021)
Eupromerella propinqua
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Eupromerella
Eupromerella propinqua

description: 5. Eupromerella propinqua (Melzer, 1931)
Type locality — Brazil, São Paulo: São Paulo (Saúde). (MZSP). Distribution — Brazil (Minas Gerais to Santa Catarina), Paraguay, Argentina.
 Acanthoderes propinqua Melzer, 1931a: 61, pl. 13, fig. 16; Zikán & Zikán, 1944: 35 (distr.); Zikán & Wygodzinsky, 1948: 44 (type); Zajciw, 1968d: 141 (distr.).
 Acanthoderes (Psapharochrus) propinqua; Bosq, 1945: 53 (distr.); Viana, 1972: 376 (distr.).
 Eupromerella propinqua; Monné & Giesbert, 1992: 252; Di Iorio, 1997a: 152 (hosts); González & Di Iorio, 1997: 170 (hosts); Monné, 2001b: 41 (cat. hosts); Di Iorio in Cordo et al., 2004: 59 (hosts).
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
Measurable nonlocal effect of bipartite system during a local cyclic evolution of its subsystem
Creators: name: Fu, Li-Bin
Publisher: name: arXiv
Year: 2004
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this letter, a nonlocal effect for a bipartite system which is induced by a local cyclic evolution of one of its subsystem is suggested. This effect vanishes when the system is at a disentangled pure state but can be observed for some disentangled mixed states. As a paradigm, we study the effect for the system of two qubits in detail. It is interesting that the effect is directly related to the degree of entanglement for pure state of qubit pairs. Furthermore, we suggest a Bell-type experiment to measure this nonlocal effect for qubit pairs.
description: 5 pages, 2 figures
Re-pricing in Grocery Stores
Creators: name: Grinnell, Gerald
name: Grinnell, Gerald
Publisher: name: Unknown
Year: 1981
Subjects: subject: Marketing
subject: FOS: Economics and business

description: The practice of stamping one price on top of another price has traditionally ranked high on the list of complaints consumers have about supermarkets. Largely due to rapidly rising food prices, opposition to re-pricing ran highest during the 1970's, and numerous attempts were made to legislate re-pricing bans at the national, State, and local levels. Grocers are not unanimous in their opinion of re-pricing. Some contend that the benefits derived are not worthwhile, considering the amount of consumer dissatisfaction that it generates. Others, probably most, say that after a sale they must re-price the remaining stock at the presale level, and many also want to raise prices as soon as they have to pay more for the merchandise they purchase.
Trembling Motion of Exciton-Polaritons Close to the Rashba-Dresselhaus Regime
Creators: name: Wen, Wen
name: Liang, Jie
name: Xu, Huawen
name: Jin, Feng
name: Rubo, Yuri G.
name: Liew, Timothy C. H.
name: Su, Rui
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report the experimental emulation of trembling quantum motion, or Zitterbewegung, of exciton polaritons in a perovskite microcavity at room temperature. By introducing liquid crystal molecules into the microcavity, we achieve spinor states with synthetic Rashba-Dresselhaus spin-orbit coupling and tunable energy splitting. Under a resonant excitation, the polariton fluid exhibits clear trembling motion perpendicular to its flowing direction, accompanied by a unique spin pattern resembling interlocked fingers. Furthermore, leveraging on the sizable tunability of energy gaps by external electrical voltages, we observe the continuous transition of polariton Zitterbewegung from relativistic (small gaps) to non-relativistic (large gaps) regimes. Our findings pave the way for using exciton polaritons in the emulation of relativistic quantum physics.
Curvature Estimates in Asymptotically Flat Lorentzian Manifolds
Creators: name: Finster, Felix
name: Kraus, Margarita
Publisher: name: arXiv
Year: 2003
Subjects: subject: Differential Geometry (math.DG)
subject: Mathematical Physics (math-ph)
subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We consider an asymptotically flat Lorentzian manifold of dimension (1,3). An inequality is derived which bounds the Riemannian curvature tensor in terms of the ADM energy in the general case with second fundamental form. The inequality quantifies in which sense the Lorentzian manifold becomes flat in the limit when the ADM energy tends to zero.
description: 15 pages (published version)
Girovagando tra studi antropologici e Coronavirus
Creators: name: Callari Galli, Matilde
Publisher: name: Humanities
Year: 2022

description: Per iniziativa della Federazione Italiana di Tradizioni Popolari, con il patrocinio delle università di Palermo, Catania e Messina, i comuni di Taormina e Mistretta, da anni è stato istituito il Premio Giuseppe Cocchiara, in onore del grande studioso di discipline etnoantropologiche che insegnò presso l’Università di Palermo. Nell’anno 2020 il premio è stato assegnato alla antropologa Matilde Callari, che ha potuto ritirare il premio soltanto nel mese di dicembre 2021 a causa delle restrizioni imposte dal dilagare del Coronavirus. La cerimonia di consegna si è svolta nell’aula consiliare di Taormina, alla presenza di un numero contingentato di studiosi ammessi, ma è stata trasmessa in streaming – ed è ancora visibile – sul canale YouTube del Comune di Taormina. Il 10 dicembre 2021, in occasione della cerimonia di consegna, la professoressa Callari ha tenuto una lectio magistralis che riproponiamo qui per coloro che volessero consultare il testo scritto, integralmente letto in quella occasione.
description: Humanities, V. 10, N. 2 (2021)
Le memorie “altre” dell’esilio antifascista: “ravveduti”, agenti provocatori, libellisti di regime
Creators: name: Fedele, Santi
Publisher: name: Humanities
Year: 2022

description: «L'Historia si può veramente deffinire una guerra illustre contro il Tempo, perchè togliendoli di mano gl'anni suoi prigionieri, anzi già fatti cadaueri, li richiama in vita, li passa in rassegna, e li schiera di nuovo in battaglia. Ma gl'illustri Campioni che in tal Arringo fanno messe di Palme e d'Allori, rapiscono solo che le sole spoglie più sfarzose e brillanti, imbalsamando co' loro inchiostri le Imprese de Prencipi e Potentati, e qualificati Personaggj, e trapontando coll'ago finissimo dell'ingegno i filid'oro e di seta.....
description: Humanities, V. 10, N. 2 (2021)
NUT charge in linearized infinite derivative gravity
Creators: name: Kolar, Ivan
name: Mazumdar, Anupam
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the gravitational field of the NUT-like source in the linearized (ghost-free) infinite derivative gravity. Such a source is equivalent to the spinning semi-infinite cosmic string with no tension. In general relativity, the linearized (massless) Taub-NUT solution has a curvature singularity as well as a topological defect corresponding to distributional curvature on one half of the symmetry axis called the Misner string. We find the NUT-charged spacetime in the linearized infinite derivative gravity. We show that it is free from curvature singularities as well as Misner strings. We also discuss an asymptotic limit along the symmetry axis that leads to the spacetime of a spinning cosmic string of infinite length.
description: 10 pages, 4 figures
Eupromerella semigrisea
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Eupromerella
Eupromerella semigrisea

description: 6. Eupromerella semigrisea (Bates, 1861)
Type locality — Brazil, Rio de Janeiro. (MNHN). Distribution — Brazil (Minas Gerais to Santa Catarina).
 Acanthoderes semigriseus Bates, 1861: 217; Zikán & Zikán, 1944: 35 (distr.); Zajciw, 1958a: 18 (distr.); 1970a: 5 (distr.); 1972a: 67 (distr.); 1974a: 78 (distr.).
 Scythropopsis semigriseus; Lacordaire, 1872: 754.
 Acanthoderes (Psapharochrus) semigrisea; Aurivillius, 1923a: 388 (cat.); Buck, 1959: 604 (distr.); Viana, 1972: 376 (distr.).
 Eupromerella semigrisea; Monné & Giesbert, 1992: 252.
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
L’identità plurale dell’uomo nell’antropologia filosofica di Hannah Arendt. Possibili declinazioni
Creators: name: Giacobello, Maria Laura
Publisher: name: Humanities
Year: 2022

description: L’identità umana si connota per la sua radicale pluralità, in ogni possibile declinazione. L’antropologia filosofica di Hannah Arendt, in questa specifica prospettiva, offre l’immagine di un’identità interattiva, espressione di un soggetto dinamico che individua se stesso attualizzando al contempo la relazione con l’altro: la dimensione del “chi” è infatti quella in cui entriamo in relazione con gli altri e quindi abitiamo il mondo. La pluralità è la legge della terra. Se la persona è costitutivamente dialogica, a causa della sua struttura intrinsecamente relazionale, la sua realizzazione passa inevitabilmente attraverso l’esercizio dell’azione, che trova il suo luogo di elezione nello spazio pubblico, in cui si pratica la politica.
description: Humanities, V. 10, N. 2 (2021)
A Damsel in Distress: Is STEM Intended to Rescue Education?
Creators: name: DeAbreu, Robert
Publisher: name: The University of British Columbia
Year: 2013

description: In his work entitled “The Gender in U.S. School Reform,” William Pinar makes clear that teaching is a profession that is gendered female in the political imaginary of the U.S. In truth, more and more teachers are expected to take responsibility for the learning in their classroom in the same way that the wife in the nuclear family was blamed if her children failed in some way, regardless of the participation (or lack thereof) by the children’s father in their upbringing. The great lamentation of politicians and parents in the U.S. over the decline of the education system, and the “lack of relevance” of “brick and mortar” schools is surely related to this “problem” of the feminine. Enter stage right mathematics and science, subjects largely pursued by males and the requirement, it can be argued, of many professions engendered male (Langille, 1993; Pegley, 2007). Mathematics, science and technology are lauded as important pursuits by many, and this is reinforced, among other things, by government initiatives (e.g. STEM: Science, Technology, Engineering and Mathematics) and college and university entrance requirements worldwide – for better or for worse (Hacker, 2012). There is much work being done, as we will see, by educators and researchers, government initiatives and private corporations, to encourage girls to pursue careers in mathematics, science and technology – as if, somehow, their lack of engagement in these fields is the penultimate problem we face. With the gendered history of education, one can not help but wonder: Is STEM being strongly encouraged worldwide with the (un?)intended purpose of “rescuing” education, the damsel in distress? Two recent initiatives that are intent on increasing girls’ engagement with STEM related fields were fraught with harmful assumptions about gender, and point to the heroism perceived characteristic of these subjects with respect to education. I will examine these initiatives.
Motor Carrier Act of 1980
Creators: name: Hutchinson, T.Q.
name: Hutchinson, T.Q.
Publisher: name: Unknown
Year: 1981
Subjects: Public Economics

description: The Motor Carrier Act of 1980, signed into law last July, is intended to promote competitive and efficient service by encouraging more rate and service options and promoting intermodal transportation. Market forces, rather than rulings of the Interstate Commerce Commission (ICC), are now the preferred means of bringing change in the motor carrier industry. For the food sector, the act chiefly affects the distribution of processed foods and farm inputs. Unprocessed farm products were not regulated under the prior act and this exemption continues. Other farm-related products have been added to exempt status. The 1980 Act also provides an opportunity for food distributors to cut costs by making more trucks eligible to transport food products. In addition, the act allows food manufacturers and wholesalers to offer discounts to their customers if they pick up their own purchases, a practice that was previously banned.
Twisted accretion curtains in the intermediate polar FO Aquarii
Creators: name: Evans, P. A.
name: Hellier, Coel
name: Ramsay, Gavin
name: Cropper, Mark
Publisher: name: arXiv
Year: 2003
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on a ~37-ks XMM-Newton observation of the intermediate polar FO Aquarii, presenting X-ray and UV data from the EPIC and OM cameras. We find that the system has changed from its previously reported state of disc-overflow accretion to one of purely disc-fed accretion. We detect the previously reported `notch' feature in the X-ray spin pulse, and explain it as a partial occultation of the upper accretion pole. Maximum flux of the quasi-sinusoidal UV pulse coincides with the notch, in keeping with this idea. However, an absorption dip owing to the outer accretion curtains occurs 0.27 later than the expected phase, which implies that the accretion curtains are twisted, trailing the magnetic poles. This result is the opposite of that reported in PQ Gem, where accreting field lines were found to lead the pole. We discuss how such twists relate to the accretion torques and thus the observed period changes of the white dwarfs, but find no simple connection.
description: 7 pages, 5 figures. Accepted by MNRAS
Unveiling complex magnetic field configurations in red giant stars
Creators: name: Das, Srijan Bharati
name: Einramhof, Lukas
name: Bugnet, Lisa
Publisher: name: arXiv
Year: 2024
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Recent measurements of magnetic field strength inside the radiative interior of red giant stars open the way towards the characterization of the geometry of stable large-scale magnetic fields. However, current measurements do not properly constrain the topology of magnetic fields due to degeneracies on the observed magnetic field signature on such $\ell=1$ mode frequencies. Efforts focused towards unambiguous detections of magnetic field configurations are now key to better understand angular momentum transport in stars. We investigate the detectability of complex magnetic field topologies inside the radiative interior of red giants. We focus on a field composed of a combination of a dipole and a quadrupole (quadrudipole), and on an offset field. We explore the potential of probing such magnetic field topologies from a combined measurement of magnetic signatures on $\ell=1$ and quadrupolar ($\ell=2$) mixed mode oscillation frequencies. We first derive the asymptotic theoretical formalism for computing the asymmetric signature in frequency pattern for $\ell=2$ modes due to a quadrudipole magnetic field. The degeneracy of the quadrudipole with a dipole is lifted when considering both $\ell=1$ and $\ell=2$ mode frequencies. In addition to the analytical derivation for the quadrudipole, we present the prospect for complex magnetic field inversions using magnetic sensitivity kernels from standard perturbation analysis for forward modeling. Using this method, we demonstrate that offset fields may be mistaken for weak and centered magnetic fields, resulting in underestimating magnetic field strength in stellar cores. We emphasize the need to characterize $\ell=2$ mixed-mode frequencies, (along with the currently characterized $\ell=1$ mixed modes), to unveil the higher-order components of the geometry of buried magnetic fields, and better constrain angular momentum transport inside stars.
description: Submitted to Astronomy and Astrophysics, 17 pages, 11 figures and 1 table
L'attività estrattiva della pomice dell'isola di Lipari nei racconti di alcuni autori siciliani del II dopoguerra
Creators: name: La Greca, Giuseppe
Publisher: name: Humanities
Year: 2022

description: Nel corso del 1949 il primo autore siciliano che accenna alle cave di pomice è Gaetano Falzone nel suo reportage “Viaggio alle isole Eolie” (…) Le coste dell’isola di Lipari, tra Canneto ed Acquacalda, strapiombano bianche sul mare. Alle falde sono gli stabilimenti per la lavorazione della pomice di cui l’isola è ricca. Le colate bianche sembrano sommergere le attrezzature. Il seno stesso dei monti è traforato e squarciato. Il contrasto di questo versante con l’altro, quello che si riassume nella grazia luminosa e chiara di Quattropani, è stridente, ma a contrasti di questo genere, solcando le acque dell’arcipelago eoliano, dovremo abituarci. Isole selvagge, con rupi paurose e orridi nereggianti, si alternano a isole fiorite e leggiadre, e montagne candide come la neve a montagne che hanno il colore della ruggine.
description: Humanities, V. 10, N. 2 (2021)
Transition from clogging to continuous flow in constricted particle suspensions
Creators: name: Souzy, Mathieu
name: Zuriguel, Iker
name: Marin, Alvaro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: When suspended particles are pushed by liquid flow through a constricted channel they might either pass the bottleneck without trouble or encounter a permanent clog that will stop them forever. However, they may also flow intermittently with great sensitivity to the neck-to-particle size ratio D/d. In this work, we experimentally explore the limits of the intermittent regime for a dense suspension through a single bottleneck as a function of this parameter. To this end, we make use of high time- and space-resolution experiments to obtain the distributions of arrest times T between successive bursts, which display power-law tails with characteristic exponents. These exponents compare well with the ones found for as disparate situations as the evacuation of pedestrians from a room, the entry of a flock of sheep into a shed or the discharge of particles from a silo. Nevertheless, the intrinsic properties of our system i.e. channel geometry, driving and interaction forces, particle size distribution seem to introduce a sharp transition from a clogged state to a continuous flow, where clogs do not develop at all. This contrasts with the results obtained in other systems where intermittent flow, with power-law exponents above two, were obtained.
description: 6 pages, 4 figures. Accepted for publication in Phys. Rev. E rapids
Near-ultraviolet detections of four dwarf nova candidates in the globular cluster 47 Tucanae
Creators: name: Modiano, David
name: Parikh, Aastha S.
name: Wijnands, Rudy
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We investigate near-ultraviolet (NUV) variability in the Galactic globular cluster (GC) 47 Tucanae (47 Tuc). This work was undertaken within the GC sub-project of the Transient UV Objects project, a programme which aims to find and study transient and strongly variable UV sources. Globular clusters are ideal targets for transient searches because of their high stellar densities and large populations of variable systems. Using all archival observations of 47 Tuc obtained with the UV/optical telescope (UVOT) aboard the Neil Gehrels Swift observatory with the uvm2 filter, we searched for UV variability using a specialised pipeline which utilises difference image analysis. We found four clear transients, hereafter SW1-4, with positions consistent with those of known cataclysmic variables (CVs) or CV candidates identified previously using Hubble Space Telescope observations. All four sources exhibit significant outbursts. Based on the inferred outburst properties and the association with known CVs, we tentatively identify the UV transients as CV-dwarf novae (DNe). Two DNe have been previously observed in 47 Tuc: V2, which has a position consistent with that of SW4; and AKO 9, which was not in outburst during any of the UVOT observations. We thus increase the known number of DNe in 47 Tuc to 5 and the total number of detected DNe in all Galactic GCs combined from 14 to 17. We discuss our results in the context of the apparent scarcity of DNe in GCs. We suggest that the likely cause is observational biases, such as limited sensitivity due to the high background from unresolved stars in the GC and limited angular resolution of the telescopes used. We additionally detected one strongly variable source in 47 Tuc, which could be identified as the known RR Lyrae star HV 810. We found its period to have significantly increased with respect to that measured from data taken in 1988.
description: 12 pages, 6 figures. Accepted to A&A on 15/12/2019
Propinquity drives the emergence of network structure and density
Creators: name: Gallos, Lazaros K.
name: Havlin, Shlomo
name: Stanley, H. Eugene
name: Fefferman, Nina H.
Publisher: name: arXiv
Year: 2019
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: The lack of large-scale, continuously evolving empirical data usually limits the study of networks to the analysis of snapshots in time. This approach has been used for verification of network evolution mechanisms, such as preferential attachment. However, these studies are mostly restricted to the analysis of the first links established by a new node in the network and typically ignore connections made after each node's initial introduction. Here, we show that the subsequent actions of individuals, such as their second network link, are not random and can be decoupled from the mechanism behind the first network link. We show that this feature has strong influence on the network topology. Moreover, snapshots in time can now provide information on the mechanism used to establish the second connection. We interpret these empirical results by introducing the propinquity model, in which we control and vary the distance of the second link established by a new node, and find that this can lead to networks with tunable density scaling, as found in real networks. Our work shows that sociologically meaningful mechanisms are influencing network evolution and provides indications of the importance of measuring the distance between successive connections.
description: 32 pages, 9 figures, includes Supplementary Information
A Comment on "Memory Effects in an Interacting Magnetic Nanoparticle System"
Creators: name: Zheng, R. K.
name: Zhang, X. X.
Publisher: name: arXiv
Year: 2004
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: Recently, Sun et al reported that striking memory effects had been clearly observed in their new experiments on an interacting nanoparticle system [1]. They claimed that the phenomena evidenced the existence of a spin-glass-like phase and supported the hierarchical model. No doubt that a particle system may display spin-glass-like behaviors [2]. However, in our opinion, the experiments in Ref. [1] cannot evidence the existence of spin-glass-like phase at all. We will demonstrate below that all the phenomena in Ref. [1] can be observed in a non-interacting particle system with a size distribution. Numerical simulations of our experiments also display the same features.
description: A comment on "Phys. Rev. Lett. 91, 167206"
Cosmic spin and mass evolution of black holes and its impact
Creators: name: Bhattacharyya, Dipanweeta
name: Mangalam, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We build an evolution model of the central black hole that depends on the processes of gas accretion, the capture of stars, mergers as well as electromagnetic torque. In case of gas accretion in the presence of cooling sources, the flow is momentum-driven, after which the black hole reaches a saturated mass; subsequently, it grows only by stellar capture and mergers. We model the evolution of the mass and spin with the initial seed mass and spin in $Λ$CDM cosmology. For stellar capture, we have assumed a power-law density profile for the stellar cusp in a framework of relativistic loss cone theory that include the effects of black hole spin, Carter's constant, loss cone angular momentum, and capture radius. Based on this, the predicted capture rates of $10^{-5}$--$10^{-6}$ yr$^{-1}$ are closer to the observed range. We have considered the merger activity to be effective for $z \lesssim 4$, and we self-consistently include the Blandford-Znajek torque. We calculate these effects on the black hole growth individually and in combination, for deriving the evolution. Before saturation, accretion dominates the black hole growth ($\sim 95\%$ of the final mass), and subsequently, stellar capture and mergers take over with roughly equal contribution. The simulations of the evolution of the $M_{\bullet} - σ$ relation using these effects are consistent with available observations. We run our model backward in time and retrodict the parameters at formation. Our model will provide useful inputs for building demographics of the black holes and in formation scenarios involving stellar capture.
description: 56 pages, 27 figures; accepted for publication in the Astrophysical Journal; v2: updated references, typos fixed, editorial changes; v3: corrections during proofs
ISHLAB CHIQARISH VA TA'LIM INTEGRATSIYADAGI MUAMMO HAMDA YECHIMLAR
Creators: name: Aminov, Shavkatjon
Publisher: name: Zenodo
Year: 2024

description: Mazkur maqolada fanlararo integratsiya, integratsiyalashgan darslarning samaradorligini oshirish, ta’lim prinsiplari hamda integratsiyalashgan o‘qitishning o‘quvchilar o‘quv faoliyatidagi samaradorligi haqida so‘z yuritiladi.
Response to "Comment on 'Origin of the Curie--von Schweidler law and the fractional capacitor from time-varying capacitance [J. Pow. Sources 532 (2022) 231309]' "
Creators: name: Pandey, Vikash
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Systems and Control (eess.SY)
subject: FOS: Physical sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: 26A33, 94C60

description: We welcome Allagui et al.'s discussions about our recent paper that has proposed revisions to the existing theory of capacitors. It gives us an opportunity to emphasize on the physical underpinnings of the mathematical expressions that are relevant for modeling using fractional derivatives. The concerns raised by Allagui et al. are found to be quite questionable when examined in light of the established standard results of fractional calculus. Consequently, the inferences that they have drawn are not true. Finally, we would like to thank Allagui et al. because this subsequent Response to their Comment has actually led to a further consolidation of our results that are supposed to be significant for materials science as well as for fractional control systems and engineering.
description: 8 pages
Scomparsa e rinascita del tempo irreversibile. Dalla separazione all’alleanza tra le due culture
Creators: name: Giorgianni, Emanuela
Publisher: name: Humanities
Year: 2022

description: Tramite il confronto con il mito di Κρόνος, divinità greca del tempo, e la sua uccisione da parte del figlio Zeus, il saggio ripercorre il cammino, compiuto dalla scienza e dagli scienziati, a partire dal loro rifiuto dell’irreversibilità del tempo sino alla sua, quasi scandalosa, riscoperta. Il lavoro vuole mettere in luce, in un percorso storico-epistemologico, come sarà l’ingresso del disordine nella scienza a portare questo cambiamento, grazie agli studi di Fourier sulla propagazione dei corpi prima, al secondo principio della termodinamica e l’aumento dell’entropia dopo. Il tempo ha una freccia, una direzione, ed è il futuro. Tali scoperte costringono gli scienziati ad abbandonare la pretesa di controllare ogni aspetto della realtà e accompagnano, invece, gli uomini nell’imprevedibilità irreversibile di questo futuro. I sistemi viventi sono sistemi complessi lontani dall’equilibrio; sono, con le parole di Ilya Prigogine, strutture dissipative, attraversate da fluttuazioni e disordini che determinano il loro destino, imprevedibile e irreversibile. La temporalità torna ad essere struttura di tutto ciò che esiste; Κρόνος, da tempo divoratore e tiranno, si trasforma in Kαιρός, attimo propizio da cogliere, tempo umano, creativo, solidale. E se l’idea di un tempo reversibile sanciva una separazione tra le due culture, poiché la scienza descriveva un mondo non coincidente con quello esperito ogni giorno, la scoperta della sua irreversibilità permette di sanare lo iato, non soltanto tra cultura scientifica e umanistica, ma anche tra uomo e Natura. Si crea una “nuova alleanza”.
description: Humanities, V. 10, N. 2 (2021)
Eupromerella versicolor
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Eupromerella
Eupromerella versicolor

description: 8. Eupromerella versicolor (Melzer, 1935)
Type locality — Brazil, Santa Catarina: Nova Teutonia. (MZSP). Distribution — Brazil (Santa Catarina).
 Acanthoderes versicolor Melzer, 1935: 190; Zikán & Wygodzinsky, 1948: 45 (type); Zajciw, 1958a: 18 (distr.).
 Acanthoderes (Psapharochrus) versicolor; Gilmour, 1965: 616 (cat.).
 Eupromerella versicolor; Monné & Giesbert, 1992: 252 (syn.).
 Eupromerella brasiliensis Fisher, 1938: 148; Breuning, 1974a: 44.
Type locality — Brazil, Santa Catarina: Nova Teutonia. (USNM).
  Exalphus Restello, Iannuzzi & Marinoni, 2001
 Exalphus Restello, Iannuzzi & Marinoni, 2001: 296.
 Type­species — Alphus leuconotus Thomson, 1860 (original designation).
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
Theory of the [111] magnetization plateau in spin ice
Creators: name: Moessner, R.
name: Sondhi, S. L.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The application of a magnetic field along the [111] direction in the spin ice compounds leads to two magnetization plateaux, in the first of which the ground state entropy is reduced but still remains extensive. We observe that under reasonable assumptions, the remaining degrees of freedom in the low field plateau live on decoupled kagome planes, and can be mapped to hard core dimers on a honeycomb lattice. The resulting two dimensional state is critical, and we have obtained its residual entropy -- in good agreement with a recent experiments -- the equal time spin correlations as well as a theory for the dynamical spin correlations. Small tilts of the field are predicted to lead a vanishing of the entropy and the termination of the critical phase by a Kasteleyn transition characterized by highly anisotropic scaling. We discuss the thermally excited defects that terminate the plateau either end, among them an exotic string defect which restores three dimensionality.
description: 13 pages, 7 figures autmatically included
Paradoxical games and Brownian thermal engines
Creators: name: Parrondo, J. M. R.
name: de Cisneros, B. J.
Publisher: name: arXiv
Year: 2003
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Two losing games, when alternated in a periodic or random fashion, can produce a winning game. This paradox occurs in a family of stochastic processes: if one combines two or more dynamics where a given quantity decreases, the result can be a dynamic system where this quantity increases. The paradox could be applied to a number of stochastic systems and has drawn the attention of researchers from different areas. In this paper we show how the phenomenon can be used to design Brownian or molecular motors, i.e., thermal engines that operate by rectifying fluctuations. We briefly review the literature on Brownian motors, pointing out that a new thermodynamics of Brownian motors will be fundamental to the understanding of most processes of energy transduction in molecular biology.
description: 12 pages, 6 figures. Minor errors corrected
Sodium: Why the Concern?
Creators: name: Putnam, Judy Jones
name: Reidy, Kathleen
name: Putnam, Judy Jones
name: Reidy, Kathleen
Publisher: name: Unknown
Year: 1981
Subjects: Food Consumption/Nutrition/Food Safety

description: Concerned that indiscriminate use of salt and other sodium compounds contributes to the incidence and severity of hypertension and other ailments, the Food and Drug Administration (FDA) has started a campaign to persuade Americans to cut excess sodium from their diets. One step in that campaign will be an effort to encourage industry to add less sodium to processed foods. FDA will propose requiring manufacturers to disclose the amount of sodium in products when they use a nutrition label. In addition, FDA will consider legislative options for including sodium labeling on products without nutrition labeling where the need is evident. Finally, it plans to monitor changes in sodium consumption to see whether progress is achieved.
Recensione a: Giuseppe Campagna, Messina Judaica. Ebrei, neofiti e criptogiudei in un emporio del Mediterraneo (secc. XV-XVI), prefazione di Lina Scalisi, Rubbettino Editore, Soveria Mannelli 2020, pp. 249
Creators: name: Villanti, Nicolò
Publisher: name: Humanities
Year: 2022

description: Il volume di Giuseppe Campagna rappresenta il frutto delle sue ricerche dottorali – terminate nel 2018 – condotte presso l’Università di Messina sotto la supervisione di Salvatore Bottari. Uno studio completo sulla composizione e caratteristiche della comunità ebraica messinese era da lungo tempo atteso alla luce dell’importanza della città stessa nello spazio mediterraneo in epoca medievale e moderna e delle potenzialità di una documentazione alquanto trascurata dagli studiosi. Ben nota infatti è la consolidata tendenza da parte della storiografia sulla Sicilia medievale e della prima età moderna a concentrarsi sull’area centrooccidentale dell’isola. L’Autore giunge a conclusione del lavoro all’interno di un percorso più ampio e variegato, nel quale è da rilevare la meritevole attenzione nell’indagare l’evoluzione della presenza di questa minoranza anche in realtà urbane minori della Sicilia. Segnalo, in particolare, la monografia Randazzo ebraica.
description: Humanities, V. 10, N. 2 (2021)
Predicting the Role of Political Trolls in Social Media
Creators: name: Atanasov, Atanas
name: Morales, Gianmarco De Francisci
name: Nakov, Preslav
Publisher: name: arXiv
Year: 2019
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences
subject: I.2.7
subject: 68T50

description: We investigate the political roles of "Internet trolls" in social media. Political trolls, such as the ones linked to the Russian Internet Research Agency (IRA), have recently gained enormous attention for their ability to sway public opinion and even influence elections. Analysis of the online traces of trolls has shown different behavioral patterns, which target different slices of the population. However, this analysis is manual and labor-intensive, thus making it impractical as a first-response tool for newly-discovered troll farms. In this paper, we show how to automate this analysis by using machine learning in a realistic setting. In particular, we show how to classify trolls according to their political role ---left, news feed, right--- by using features extracted from social media, i.e., Twitter, in two scenarios: (i) in a traditional supervised learning scenario, where labels for trolls are available, and (ii) in a distant supervision scenario, where labels for trolls are not available, and we rely on more-commonly-available labels for news outlets mentioned by the trolls. Technically, we leverage the community structure and the text of the messages in the online social network of trolls represented as a graph, from which we extract several types of learned representations, i.e.,~embeddings, for the trolls. Experiments on the "IRA Russian Troll" dataset show that our methodology improves over the state-of-the-art in the first scenario, while providing a compelling case for the second scenario, which has not been explored in the literature thus far.
Foreign Investments in U.S. Commercial Food Service
Creators: name: Seigle, N.
name: Seigle, N.
Publisher: name: Unknown
Year: 1981
Subjects: International Relations/Trade

description: At least $2. 7 billion of the over $93 billion in U.S. commercial food service sales last year were made by 58 firms affiliated- in one form or another-with foreign investors.
Recensione a: Mario Bolognari (a cura di), Il mistero e l’inganno. Pensare, narrare e creare la Sicilia, Navarra editore, Palermo 2021, pp. 240
Creators: name: M, E
Publisher: name: Humanities
Year: 2022

description: Ormai da diversi anni la Sicilia, luogo geografico, ma anche idea, simbolo di un modo di vivere e di pensare, è divenuta argomento per la letteratura, l’arte figurativa, il cinema, la fotografia, persino per la pubblicità. Questo fenomeno mediatico è interessante perché denota una vocazione dell’isola a diventare protagonista nei contesti narrativi. Per indagare e capire questo fenomeno Navarra editore di Palermo, ha pubblicato nel 2021 il volume Il mistero e l’inganno. Pensare, narrare e creare la Sicilia, una raccolta di saggi curata dall’antropologo culturale Mario Bolognari.
description: Humanities, V. 10, N. 2 (2021)
Professionelles Handeln im Sozialdienst: Rahmenbedingungen und Optimierungspotenziale im Kanton Schwyz
Creators: name: Arnold, Myrta
name: Jeseneg, Sarah
Publisher: name: Hochschule Luzern – Soziale Arbeit
Year: 2025

description: In dieser Bachelorarbeit werden die strukturellen und organisatorischen Rahmenbedingungen untersucht, die für ein professionelles Handeln in den Sozialdiensten des Kantons Schwyz erforderlich sind. Anhand einer empirischen Studie in Form einer Gruppendiskussion mit Sozialarbeiter*innen werden wesentliche Schwierigkeiten und Möglichkeiten in Zusammenhang mit dem beruflichen Handeln identifiziert. Die Arbeit stützt sich auf verschiedene theoretische Ansätze und Studien, darunter das Tripelmandat, das Trigon-Modell sowie die Winterthurer-Studie (Höglinger et al., 2021) zur Fallbelastung, um die Wechselwirkungen zwischen Struktur, Organisation und professionellem Handeln zu analysieren. Die Ergebnisse deuten darauf hin, dass ein einheitliches Bundesrahmengesetz zur Harmonisierung der Sozialhilfe erforderlich ist, um Ungleichheiten zwischen den Kantonen abzubauen und den Klient*innen eine gerechte Unterstützung zu gewährleisten. Darüber hinaus wird die Bedeutung einer qualifizierten Leitung, einer kontinuierlichen Weiterbildung und der Förderung einer Reflexionskultur betont. In der Arbeit wird hervorgehoben, dass die Qualität der Sozialarbeit massgeblich von einer angemessenen Fallbelastung, dem Zugang zu Fachwissen und unterstützenden physischen und technischen Ressourcen abhängt. Zum Schluss werden konkrete Handlungsempfehlungen formuliert, die dazu dienen, die Rahmenbedingungen für professionelles Handeln in den Sozialdiensten zu verbessern und die Qualität der sozialen Dienstleistungen zu erhöhen.
description: + Code Diss LU: hslusa basa be + Fussnote: Bachelor-Arbeit, Hochschule Luzern – Soziale Arbeit, Studienrichtung Sozialarbeit, 2025 + NL-Code: NLLUHSA202502
Exalphus aurivillii
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Exalphus
Exalphus aurivillii

description: 1. Exalphus aurivillii (Lane, 1970)
Type locality — British Guiana, Rockstone. (BMNH). Distribution — Guyana, French Guiana, Brazil (Pará).
 Alphus aurivillii Lane, 1970b: 389; Tavakilian et al., 1997: 310, 312 (hosts); Monné, 2001b: 39 (cat. hosts).
 Exalphus aurivillii; Restello et al., 2001: 296.
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553
Exalphus biannulatus
Creators: name: Monné, Miguel A.
Publisher: name: Zenodo
Year: 2005
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Cerambycidae
Exalphus
Exalphus biannulatus

description: 2. Exalphus biannulatus (Aurivillius, 1921)
Syntype localities — Peru. Bolivia. (NHRS). Distribution — Ecuador, Peru, Bolivia, Brazil (Amazonas, Rondônia).
 Alphus biannulatus Aurivillius, 1921: 50, pl. 2, fig. 8.
 Exalphus biannulatus; Restello et al., 2001: 296.
description: Published as part of Monné, Miguel A., 2005, Catalogue of the Cerambycidae (Coleoptera) of the Neotropical Region. Part II. Subfamily Lamiinae, pp. 1-760 in Zootaxa 1023 (1) on pages 1-760, DOI: 10.11646/zootaxa.946.1.1, http://zenodo.org/record/5049553