cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Short-Pulsed Metamaterials
Creators: name: Rizza, Carlo
name: Castaldi, Giuseppe
name: Galdi, Vincenzo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study a class of temporal metamaterials characterized by time-varying dielectric permittivity waveforms of duration much smaller than the characteristic wave-dynamical timescale. In the analogy between spatial and temporal metamaterials, such a short-pulsed regime can be viewed as the temporal counterpart of metasurfaces. We introduce a general and compact analytical formalism for modeling the interaction of a short-pulsed metamaterial with an electromagnetic wavepacket. Specifically, we elucidate the role of local and nonlocal effects, as well as of the time-reversal symmetry breaking, and we show how they can be harnessed to perform elementary analog computing, such as first and second derivatives. Our theory, validated against full-wave numerical simulations, suggests a novel route for manipulating electromagnetic waves without relying on long, periodic temporal modulations. Just as metasurfaces have played a pivotal role in the technological viability and practical applicability of conventional (spatial) metamaterials, short-pulsed metamaterials may catalyze the development of temporal and space-time metamaterials.
description: 6 pages, 4 figures
Six-dimensional non-extremal Reissner-Nordstrom black hole, charged massive scalar perturbation and black hole bomb
Creators: name: Zhao, Run-Dong
name: Huang, Jia-Hui
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The superradiant stability of higher dimensional non-extremal Reissner-Nordstrom black hole under charged massive scalar perturbation is analytically studied. We extend our previous studies of four- and five-dimensional non-extremal Reissner-Nordstrom black hole cases to six-dimensional case. By analyzing the derivative of the effective potential with an analytical method, we find that no potential well exists outside the outer horizon of the black hole for the superradiant scalar modes. This means that there is no black hole bomb for the system consisting of six-dimensional Reissner-Nordstrom black hole and charged massive scalar perturbation and the system is superradiantly stable.
description: references added, 11 pages,2 figures. arXiv admin note: substantial text overlap with arXiv:2109.04035
Commencement, Salisbury University, Spring 2000
Creators: name: (:Unkn) Unknown
Publisher: name: Maryland Shared Open Access Repository
Year: 2000
Subjects: Salisbury (Md.)
Salisbury State University
Commencement ceremonies

description: Commencement ceremonies at have been held for graduates at Salisbury University since 1926, sometimes after each semester but typically in the spring. Programs always list the names of graduates and occasionally list hometown, degree, or major.
Commencement, Salisbury University, Winter 1999
Creators: name: (:Unkn) Unknown
Publisher: name: Maryland Shared Open Access Repository
Year: 1999
Subjects: Salisbury (Md.)
Salisbury State University
Commencement ceremonies

description: Commencement ceremonies at have been held for graduates at Salisbury University since 1926, sometimes after each semester but typically in the spring. Programs always list the names of graduates and occasionally list hometown, degree, or major.
Sonnenfleckenzeichnung Nr. 18137.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 04.06.1952, erstellt von Helmut Müller
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1952

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Unter Umständen sind Angaben zu Protuberanzen vermerkt
Characterisation of the stellar content of SDSS EELGs through self-consistent spectral modelling
Creators: name: Breda, Iris
name: Vilchez, José M.
name: Papaderos, Polychronis
name: Cardoso, Leandro
name: Amorin, Ricardo O.
name: Arroyo-Polonio, Antonio
name: Iglesias-Páramo, Jorge
name: Kehrig, Carolina
name: Pérez-Montero, Enrique
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Extreme emission line galaxies (EELGs) are a notable galaxy genus, ultimately being regarded as local prototypes of early galaxies at the cosmic noon. Robust characterisation of their stellar content, however, is hindered by the exceptionally high nebular emission present in their optical spectroscopic data. This study is dedicated into recovering the stellar properties of a sample of 414 EELGs as observed by the SDSS Survey. Such is achieved by means of the spectral synthesis code FADO, which self-consistently considers the stellar and nebular emission in an optical spectrum. Additionally, a comparative analysis was carried on, by further processing the EELGs sample with the purely stellar spectral synthesis code Starlight, and by extending the analysis to a sample of 697 normal star-forming galaxies, expected to be less affected by nebular contribution. We find that, for both galaxy samples, stellar mass and mean age estimates by Starlight are systematically biased towards higher values, and that an adequate determination of the physical and evolutionary properties of EELGs via spectral synthesis is only possible when nebular continuum emission is taken into account. Moreover, the differences between the two population synthesis codes can be ascribed to the degree of star-formation activity through the specific star-formation rate and the sum of the flux of the most prominent emission lines. As expected, on the basis of the theoretical framework, our results emphasise the importance of considering the nebular emission while performing spectral synthesis, even for galaxies hosting typical levels of star-formation activity.
description: 14 pages, 13 figures, accepted for publication in A&A
Sonnenfleckenzeichnung Nr. 18189.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 27.07.1952, erstellt von Adolf Lemans
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1952

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Später wurden ergänzende Angaben aufgrund auswärtiger Beobachtungen direkt auf der Fleckenzeichnung hinzugefügt. Unter Umständen sind Angaben zu Protuberanzen vermerkt
title: Pilot Study for Invasive Brown Treesnake Baiting in Residential Areas
Creators: name: Siers, Shane R.
name: Mungaray, Juan-Carlos
name: Barcinas, Jordan I. S.
name: Calaor, Jeried E.
name: Volsteadt, Rachel M.
name: Kastner, Martin
name: Goetz, Scott M.
name: Nafus, Melia G.
name: Hall, Thomas C.
Publisher: name: Utah State University
Year: 2023

description: The nocturnal brown treesnake (Boiga irregularis; BTS) was accidentally introduced to the island of Guam, USA, in the Western Pacific in 1945. The BTS has spread throughout all terrestrial habitats, causing wildlife loss and economic damage. Several tools and techniques have been developed to locally reduce BTS numbers and prevent their spread to other islands. The common analgesic acetaminophen has been registered as a low-risk pesticide to manage BTS in non-residential areas. Prior to a more intensive toxic baiting campaign on Andersen Air Force Base, Guam, as part of a larger study to evaluate the effects of BTS control on native bird survival, we conducted a pilot study from May 18 to October 6, 2020, to assess the efficacy and safety of BTS baiting within a residential area. We administered large and small domesticated mouse (Mus musculus) and bird chick (Coturnix japonica and Gallus domesticus) nontoxic carrion baits (without acetaminophen) in bait stations to evaluate BTS and nontarget bait take rates, bait preferences, movements following nighttime bait uptakes, and interactions of humans and domestic animals with baits. We monitored baits with cameras and implanted them with radio-transmitters to verify the species taking the bait and to track BTS to their daytime sheltering locations. Successful BTS bait take rates were low at 20 of 482 baits (4.1%), as were nontarget bait take rates (4 baits; 0.8%). No preference among bait types was discernible, though power to detect differences was limited due to low overall uptake. All first daytime refugia were within vegetation except for 1 location on the roof of a house. No evidence of bait removal or human tampering was found at any of the bait stations. Based on our pilot study, there appeared to be little human or nontarget risk from acetaminophen baiting in this relatively uniform and sparsely vegetated residential area. Because most of the residential areas on Guam are much more variable, similar assessments within a broader diversity of residential areas may be advisable before promoting large-scale use of acetaminophen for managing BTS in close contact with human habitations.
Sonnenfleckenzeichnung Nr. 18214.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 22.08.1952, erstellt von Helmut Müller
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1952

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Später wurden ergänzende Angaben aufgrund auswärtiger Beobachtungen direkt auf der Fleckenzeichnung hinzugefügt. Unter Umständen sind Angaben zu Protuberanzen vermerkt
En chantier
Creators: name: Gagnebin, Jeanne Marie
Publisher: name: Itinera
Year: 2018

description: This essay aims at reading Walter Benjamin’s Einbahnstrasse taking into account five interrelated aspects: the “crisis of narrativity” and the kinship of Einbahnstrasse with the surrealist texts and the practice of montage; the importance – not only romantic but also intellectual and political – of Asja Lacis, to whom the work is dedicated; the writing of Einbahnstrasse as an attempt to answer, literarily and politically, to another “Strasse”, the one of the despair and of the inflation in Weimar Republic; the form of the Denkbild; the figure of the child that plays with the debris, like in the case of the poet in Baudelaire or the proletarian children’s theater founded by Asja Lacis – the connection between Spiel and Stoff.
description: Itinera, No 14 (2017): Art, critique and memory – values and historical tensions in the experience of the city
Paris-Monad: Origin, Passage, Intermittency. Benjamin and the Metaphysics of Modern Times
Creators: name: Desideri, Fabrizio
Publisher: name: Itinera
Year: 2018

description: The background thesis of the paper concerns the deep methodological continuity that binds Benjamin’s Project on the Parisian Passages to his book on the Trauerspiel. The starting point is offered then by the reprise of the connection between Benjamin’s micrology and the theological task of critically reconstituting the whole in its original sense. This connection is consequently developed in a consideration of the “passage” as a nominal substance. On this basis is focused the complementarity in Benjamin’s late philosophy between historical materialism and theological nominalism. From the intertwining between urban and linguistic spaces emerges the figure of modern city as a labyrinth. The last move consists in converting the labyrinth in a monad, that is in an intensive space of knowledge and experience of truth.
description: Itinera, No 14 (2017): Art, critique and memory – values and historical tensions in the experience of the city
Direct view of phonon dynamics in atomically thin MoS$_{2}$
Creators: name: Britt, Tristan L.
name: Li, Qiuyang
name: de Cotret, Laurent P. René
name: Olsen, Nicholas
name: Otto, Martin
name: Hassan, Syed Ali
name: Zacharias, Marios
name: Caruso, Fabio
name: Zhu, Xiaoyang
name: Siwick, Bradley J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Transition metal dichalcogenide monolayers and heterostructures are highly tunable material systems that provide excellent models for physical phenomena at the two-dimensional (2D) limit. While most studies to date have focused on electrons and electron-hole pairs, phonons also play essential roles. Here, we apply ultrafast electron diffraction and diffuse scattering to directly quantify, with time and momentum resolution, electron-phonon coupling (EPC) in monolayer molybdenum disulfide (MoS$_{2}$) and phonon transport from the monolayer to a silicon nitride (Si$_3$N$_4$) substrate. Optically generated hot carriers result in a profoundly anisotropic distribution of phonons in the monolayer on the $\sim$ 5 ps time scale. A quantitative comparison with ab-initio ultrafast dynamics simulations reveals the essential role of dielectric screening in weakening EPC. Thermal transport from the monolayer to the substrate occurs with the phonon system far from equilibrium. While screening in 2D is known to strongly affect equilibrium properties, our findings extend this understanding to the dynamic regime.
Requoting the arcades. Walter Benjamin’s idle robbers
Creators: name: Duarte, Bruno C.
Publisher: name: Itinera
Year: 2018

description: By contrasting Walter Benjamin’s fragmentary theory of quotation to the different ways his work has itself undergone quotation thus far, a new insight can be gained into the perception of the materiality and visuality of texts. The so-called Passagen-Werk, the project on the Parisian Arcades which Benjamin pursued for more than ten years until the end of his life, is the overflowing, yet voided space where this crossing takes place.
description: Itinera, No 14 (2017): Art, critique and memory – values and historical tensions in the experience of the city
Shedding light on the electroweak phase transition from exotic Higgs boson decays at the lifetime frontiers
Creators: name: Liu, Wei
name: Yang, Aigeng
name: Sun, Hao
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We study the scenarios where a strongly first-order electroweak phase transition (EWPT) is triggered by a light singlet scalar, which has feeble interactions to the Higgs. Since the singlet scalar is light and has weak couplings, it can decay at a macroscopic distance away from the collision point. Therefore, it can be regarded as a long-lived particles (LLP) in such scenarios. We perform the searches of the LLPs from the exotic Higgs decays, at the FASER, MAPP and CMS-Timing detectors of the 14 TeV HL-LHC, to probe the strongly first-order EWPT. In certain scenarios, we show that the LLP searches can help to reach the parameter space of the strongly first-order EWPT remarkably, where the searches for promptly exotic Higgs decays are not valid.
description: 14 pages, 7 figures, to be published in PRD
Repetition, experimentation: games of chance and the urban room for play
Creators: name: Conceição, Nélio
Publisher: name: Itinera
Year: 2018

description: Walter Benjamin’s texts on Baudelaire put forward a threefold analogy, surprising at first glance, between the experience of the crowd, typical of modern metropolises, mechanized work and games of chance. While exploring gambling and the gambler in Benjamin’s analysis, this article explores the inner ambiguity of the concept of repetition: firstly conceived as belonging to the «time of hell» of the ever-new, it can also be understood as a gateway for understanding the processes of experimentation, which are crucial to modern and contemporary aesthetic experiences. In this sense, urban space can also be conceived as a room for play, vulnerable to and enriched by chance and playful mechanisms encompassing aesthetic and political dimensions.
description: Itinera, No 14 (2017): Art, critique and memory – values and historical tensions in the experience of the city
Quaternionic scalar field in the real Hilbert space
Creators: name: Giardino, Sergio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Using the complex Klein-Gordon field as a model, we quantize the quaternionic scalar field in the real Hilbert space. The lagrangian formulation has accordingly been obtained, as well as the hamiltonian formulation, and the energy and charge operators. Conversely to the complex case, the quaternionic quantization admits two quantization schemes, concerning either two or four components. Therefore, the quaternionic field permits a richer structure of states, if compared to the complex scalar field case. Moreover, the quaternionic theory admits as a further novel feature a non-associative algebraic structure in their complex components, something not observed in the complex case.
description: accept by Int. J. Mod. Phys. A
Sonnenfleckenzeichnung Nr. 18147.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 14.06.1952, erstellt von Helmut Müller
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1952

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Unter Umständen sind Angaben zu Protuberanzen vermerkt
“Erase the traces”: urban experience in Walter Benjamin’s commentary on Brecht’s lyric poetry
Creators: name: Gatti, Luciano
Publisher: name: Itinera
Year: 2018

description: This paper addresses Walter Benjamin’s commentary on the poems of the cycle “Handbook for City-Dwellers” by Bertolt Brecht, in order to discuss the specificity of Brechtian lyricism in the realm of Benjamin’s reflexions on modern urban lyric. Benjamin resumes two decisive issues to the constitution of Brecht's work: the sobriety of language and teaching as a form of transmission of urban and political experience. This link between experience and transmission is not reduced to the instruction of survival conditions in the city. It is constituted by the learning of a critical attitude related to the city. While communication between isolated individuals is precarious and the political organization illegal, the poems seek to build a bond between “I” and “you” by the poetic reflection on the urban experience.
description: Itinera, No 14 (2017): Art, critique and memory – values and historical tensions in the experience of the city
Valeurs esthétiques et valeurs éthiques. Diderot devant un tableau
Creators: name: Mazzocut-Mis, Maddalena
Publisher: name: Itinera
Year: 2018

description: Passion, structure, and technique: these are the ‘colors’ that Diderot uses to ‘paint’ his opinions in his Salons. Greuze is staged passion, Vernet is form, rhythm and ideal, and while Chardin possesses the technique and touch that are able to say everything, François Boucher is the sterility of the gesture. In Diderot’s thought, virtue can also be seen in relation to the struggle against mediocrity and bad taste. In a society dominated by the petit goût and the sterile virtuosity of the petits maîtres, real genius suffocates as taste becomes perverted. In 18th-century society, there is no art without taste.
description: Itinera, No 14 (2017): Art, critique and memory – values and historical tensions in the experience of the city
A compartmental model for cyber-epidemics
Creators: name: Aleja, D.
name: Contreras-Aso, G.
name: Alfaro-Bittner, K.
name: Primo, E.
name: Criado, R.
name: Romance, M.
name: Boccaletti, S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: In our more and more interconnected world, a specific risk is that of a cyber-epidemic (or cyber-pandemic), produced either accidentally or intentionally, where a cyber virus propagates from device to device up to undermining the global Internet system with devastating consequences in terms of economic costs and societal harms related to the shutdown of essential services. We introduce a compartmental model for studying the spreading of a malware and of the awareness of its incidence through different waves which are evolving on top of the same graph structure (the global network of connected devices). This is realized by considering vectorial compartments made of two components, the first being descriptive of the state of the device with respect to the new malware's propagation, and the second accounting for the awareness of the device's user about the presence of the cyber threat. By introducing suitable transition rates between such compartments, one can then follow the evolution of a cyber-epidemic from the moment at which a new virus is seeded in the network, up to when a given user realizes that his/her device has suffered a damage and consequently starts a wave of awareness which eventually ends up with the development of a proper antivirus software. We then compare the overall damage that a malware is able to produce in Erdős-Rényi and scale-free network architectures for both the case in which the virus is causing a fixed damage on each device and the case where, instead, the virus is engineered to mutate while replicating from device to device. Our result constitute actually the attempt to build a specific compartmental model whose variables and parameters are entirely customized for describing cyber-epidemics.
description: 6 pages, 5 figures
Atomic scale visualization of the p-d hybridization in III-V semiconductors doped with transition metal impurities
Creators: name: Badiane, K.
name: Rodary, G.
name: Amato, M.
name: Gloter, A.
name: David, C.
name: Aubin, H.
name: Girard, J. -C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: p-d hybridization of transition metal impurities in a semiconductor host is the mechanism that couples valence-band electrons and localized spins. We use scanning tunneling microscopy and spectroscopy combined with density functional theory to probe at the atomic scale hybridization of Cr single impurities with GaAs host. Combining spatial density of states mapping and in-gap states spectroscopy of the Cr substituted at the surface of the semiconductor, we give a detailed picture of the spatial extension and the electronic structure of the strongly anisotropic wave function of Cr on GaAs(110). First principles calculations allow to identify electronic character and origin of each states and show that the main resonance peaks and the wave function with "drop-eyes" lobes experimentally observed for 3d metal impurities in III-V semiconductor are direct local evidences of the p-d hybridization.
Controlling the shape of small clusters with and without macroscopic fields
Creators: name: Boccardo, Francesco
name: Pierre-Louis, Olivier
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Despite major advances in the understanding of the formation and dynamics of nano-clusters in the past decades, theoretical bases for the control of their shape are still lacking. We investigate strategies for driving fluctuating few-particle clusters to an arbitrary target shape in minimum time with or without an external field. This question is recast into a first passage problem, solved numerically, and discussed within a high temperature expansion. Without field, large-enough low-energy target shapes exhibit an optimal temperature at which they are reached in minimum time. We then compute the optimal way to set an external field to minimize the time to reach the target, leading to a gain of time that grows when increasing cluster size or decreasing temperature. This gain can shift the optimal temperature or even create one. Our results could apply to clusters of atoms at equilibrium, and colloidal or nanoparticle clusters under thermo- or electrophoresis.
description: Accepted for publication in Phys. Rev. Lett
Il Castello di Barbablù di Béla Bartók. Un’ipotesi di lettura
Creators: name: Seminara, Graziella
Publisher: name: Itinera
Year: 2018

description: Bluebeard’s Castle (A kékszakállú herceg vára), composed by Béla Bartók on a libretto by Béla Balázs, is one of the most significant musical works of the early twentieth century and a masterpiece of Hungarian modernism. The opera deals with “the eternal tragedy of the dualism between man and woman” from an original point of view, divergent from the widespread one in Western European thought and art. The essay investigates Bartók’s musical dramaturgy according to this topic.
description: Itinera, No 14 (2017): Art, critique and memory – values and historical tensions in the experience of the city
Sensibilità e motricità delle parole nella concezione poetica di Giacomo Leopardi
Creators: name: Benenati, Virginia
Publisher: name: Itinera
Year: 2018

description: The following essay is mainly concerned with materialism notion, considered as one of the very fundamental architraves of Giacomo Leopardi’s whole thought. This standpoint derives to him from Locke’s work, but our author became much more radical. The goal is to show how the pervasiveness of an integral materialistic point of view is able – in Leopardi’s layout – to effect even the linguistic scope, especially the poetic one. Our aim is to outline the potential ethical content, that the Italian thinker conveys in his pieces of advice to poets and writers.
description: Itinera, No 14 (2017): Art, critique and memory – values and historical tensions in the experience of the city
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 12.08.1952, erstellt von Gaston Coutrez, Observatoire Royal de Belgique in Uccle
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1952

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Zeichnung nach eigener Vorlage in Uccle.
Instrument: Merz-Grubb Refraktor Teleskop (Öffnung 160 mm, f = 2450 mm, projiziertes Sonnenbild D = 25 cm)
Unsupervised classification of CIGALE galaxy spectra
Creators: name: Dubois, J
name: Fraix-Burnet, D
name: Moultaka, J
name: Sharma, P
name: Burgarella, D
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Aims. The present study aims at providing a deeper insight into the power and limitation of an unsupervised classification algorithm (called Fisher-EM) on spectra of galaxies. This algorithm uses a Gaussian mixture in a discriminative latent subspace. To this end, we investigate the capacity of this algorithm to segregate the physical parameters used to generate mock spectra and the influence of the noise on the classification. Methods. With the code CIGALE and different values for nine input parameters characterising the stellar population, we have simulated a sample of 11 475 optical spectra of galaxies containing 496 monochromatic fluxes. The statistical model and the optimum number of clusters is given in Fisher-EM by the integrated completed likelihood (ICL) criterion. We repeated the analyses several times to assess the robustness of the results. Results. Two distinct classifications can be distinguished in the case of the noiseless spectra. The one above 13 clusters disappears when noise is added, while the classification with 12 clusters is very robust against noise down to a signal to noise ratio (SNR) of 3. At SNR=1, the optimum is 5 clusters, but the classification is still compatible with the previous one. The distribution of the parameters used for the simulation shows an excellent discrimination between classes. A higher dispersion both in the spectra within each class and in the parameter distribution, leads us to conclude that despite a much higher ICL, the classification with more than 13 clusters in the noiseless case is not physically relevant. Conclusions. This study yields two conclusions valid at least for the Fisher-EM algorithm. Firstly, the unsupervised classification of spectra of galaxies is both reliable and robust to noise. Secondly, such analyses are able to extract the useful physical information contained in the spectra and to build highly meaningful classifications. In an epoch of data-driven astrophysics, it is important to trust unsupervised machine learning approaches that do not require training samples which are unavoidably biased.
description: Astronomy and Astrophysics - A&A, EDP Sciences, In press
Sonnenfleckenzeichnung Nr. 18122.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 20.05.1952, erstellt von Helmut Müller
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1952

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Später wurden ergänzende Angaben aufgrund auswärtiger Beobachtungen direkt auf der Fleckenzeichnung hinzugefügt. Unter Umständen sind Angaben zu Protuberanzen vermerkt
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 08.06.1952, erstellt von Gaston Coutrez, Observatoire Royal de Belgique in Uccle
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1952

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Zeichnung nach eigener Vorlage in Uccle.
Instrument: Merz-Grubb Refraktor Teleskop (Öffnung 160 mm, f = 2450 mm, projiziertes Sonnenbild D = 25 cm)
On the large-Weissenberg-number scaling laws in viscoelastic pipe flows
Creators: name: Wan, Dongdong
name: Dong, Ming
name: Zhang, Mengqi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: This work explains a scaling law of the first Landau coefficient of the derived Ginzburg-Landau equation (GLE) in the weakly nonlinear analysis of axisymmetric viscoelastic pipe flows in the large-Weissenberg-number ($Wi$) limit, recently reported in Wan et al. J. Fluid Mech. (2021), vol. 929, A16. Using an asymptotic method, we derive a reduced system, which captures the characteristics of the linear centre-mode instability near the critical condition in the large-$Wi$ limit. Based on the reduced system we then conduct a weakly nonlinear analysis using a multiple-scale expansion method, which readily explains the aforementioned scaling law of the Landau coefficient and some other scaling laws. Particularly, the equilibrium amplitude of disturbance near linear critical conditions is found to scale as $Wi^{-1/2}$, which may be of interest to experimentalists. The current analysis reduces the numbers of parameters and unknowns and exemplifies an approach to studying the viscoelastic flow at large $Wi$, which could shed new light on the understanding of its nonlinear dynamics.
description: 18 pages, 4 figures, submitted to JFM
Sparse coupling and Markov blankets: A comment on "How particular is the physics of the Free Energy Principle?" by Aguilera, Millidge, Tschantz and Buckley
Creators: name: Heins, Conor
name: Da Costa, Lancelot
Publisher: name: arXiv
Year: 2022
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: In this commentary, we respond to a technical analysis of the Free Energy Principle (hereafter: FEP) presented in "How particular is the physics of the Free Energy Principle" by Aguilera et al. In the target article, the authors analyzed certain sparsely coupled stochastic differential equations whose non-equilibrium steady-state densities are claimed--in previous FEP literature--to have a Markov blanket. The authors demonstrate that in general, Markov blankets are not guaranteed to follow from sparse coupling. The current commentary explains the relationship between sparse coupling and Markov blankets in the case of Gaussian steady-state densities. We precisely derive conditions under which causal coupling leads--or does not lead--to Markov blankets. Importantly, our derivations hold for both linear and non-linear stochastic differential equations. This result may shed light on the sorts of systems which we expect to have Markov blankets. Future work should focus on verifying whether these sorts of constraints are satisfied in realistic models of sparsely coupled systems.
Sumcastec_180122_Na_2017Imswspresentation_Workshop Presentation_.Pdf_Frankfurt Oder_B. Cetindogan_Partners And Public_Last Draft
Creators: name: Cetindogan, Barbaros
Publisher: name: Zenodo
Year: 2018

description: Workshop presentation in the frame of the 2017 International Microwave Symposium, Honolulu HI, 4-9 June 2017. Workshop session WFS was entitled "Thermal vs non-thermal effects of electromagnetic waves for biomedical applications".
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 30.08.1952, erstellt von Gaston Coutrez, Observatoire Royal de Belgique in Uccle
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1952

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Zeichnung nach eigener Vorlage in Uccle.
Instrument: Merz-Grubb Refraktor Teleskop (Öffnung 160 mm, f = 2450 mm, projiziertes Sonnenbild D = 25 cm)
Subarcsecond view on the high-redshift blazar GB 1508+5714 by the International LOFAR Telescope
Creators: name: Kappes, A.
name: Burd, P. R.
name: Kadler, M.
name: Ghisellini, G.
name: Bonnassieux, E.
name: Perucho, M.
name: Brüggen, M.
name: Cheung, C. C.
name: Ciardi, B.
name: Gallo, E.
name: Haardt, F.
name: Morabito, L. K.
name: Sbarrato, T.
name: Drabent, A.
name: Harwood, J.
name: Jackson, N.
name: Moldon, J.
Publisher: name: arXiv
Year: 2022
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
subject: 85-02

description: Studies of the most distant AGNs allow us to test our current understanding of the physics present in radio-jetted AGNs across a range of environments. The decrease in apparent luminosity with distance is the primary difficulty to overcome in the study of these distant AGNs, which requires highly sensitive instruments. Our goal is to employ new long wavelength radio data to better parametrise the broad-band SED of GB 1508+5714, a high-redshift (z=4.30) AGN. Its high redshift, high intrinsic luminosity, and classification as a blazar allow us to test emission models that consider the efficient cooling of jet electrons via inverse Compton losses in interactions with the dense CMB photon field at high redshifts. A significant detection of this effect in GB 1508+5714 may partly explain the apparent sparsity of high-redshift radio galaxies in wide-field surveys; detections of this kind are only becoming possible with the current generation of SKA precursors. We used international LOFAR telescope to image the long wavelength radio emission around the high-redshift blazar GB 1508+5714 on arcsecond scales at frequencies between 128 MHz and 160 MHz. This allowed us to compare the spatially resolved structure with higher frequency observations, and to construct spectral index maps. The LOFAR image shows a compact unresolved core and two resolved emission regions around 2 arcsec to the east and to the west of the radio core. We find structure consistent with previous VLA observations, as well as a previously unreported emission region to the east. We interpret the arcsecond-scale radio structure of GB 1508+5714 as a FR II-like radio galaxy at a small viewing angle. Our SED modelling shows that a scenario featuring significant quenching effects caused by interaction with the CMB provides a good description of the data, and notably explains the suppressed radio emission.
description: 11 pages, 10 figures, 2 tables
Sonnenfleckenzeichnung Nr. 18191.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 30.07.1952, erstellt von Adolf Lemans
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1952

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Unter Umständen sind Angaben zu Protuberanzen vermerkt
Sonnenfleckenzeichnung Nr. 18142.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 09.06.1952, erstellt von Helmut Müller
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1952

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Unter Umständen sind Angaben zu Protuberanzen vermerkt
Viability of quantum communication across interstellar distances
Creators: name: Berera, Arjun
name: Calderón-Figueroa, Jaime
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The possibility of achieving quantum communication using photons across interstellar distances is examined. For this, different factors are considered that could induce decoherence of photons, including the gravitational field of astrophysical bodies, the particle content in the interstellar medium, and the more local environment of the Solar System. The X-ray region of the spectrum is identified as the prime candidate to establish a quantum communication channel, although the optical and microwave bands could also enable communication across large distances. Finally, we discuss what could be expected from a quantum signal emitted by an extraterrestrial civilization, as well as the challenges for the receiver end of the channel to identify and interpret such signals.
description: 18 pages. In Press Physical Review D
Exponentially-improved asymptotics and numerics for the (un)perturbed first Painlevé equation
Creators: name: Daalhuis, Adri B. Olde
Publisher: name: arXiv
Year: 2022
Subjects: subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 33E17, 34E0 (Primary) 34M35 (Secondary)

description: The solutions of the perturbed first Painlevé equation $y"=6y^2-x^μ$, $μ>-4$, are uniquely determined by the free constant $C$ multiplying the exponentially small terms in the complete large $x$ asymptotic expansions. Full details are given, including the nonlinear Stokes phenomenon, and the computation of the relevant Stokes multipliers. We derive asymptotic approximations, depending on $C$, for the locations of the singularities that appear on the boundary of the sectors of validity of these exponentially-improved asymptotic expansions. Several numerical examples illustrate the power of the approximations. For the tri-tronquée solution of the unperturbed first Painlevé equation we give highly accurate numerics for the values at the origin and the locations of the zeros and poles.
description: 13 pages, 3 figures
Sonnenfleckenzeichnung Nr. 18173.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 11.07.1952, erstellt von Helmut Müller
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1952

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Unter Umständen sind Angaben zu Protuberanzen vermerkt
Sonnenfleckenzeichnung Nr. 18224.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 02.09.1952, erstellt von Helmut Müller
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1952

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Kern-Merz-Refraktor.
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Unter Umständen sind Angaben zu Protuberanzen vermerkt
Sonnenfleckenzeichnung unnummeriert, einen Zürcher Lückentag ergänzend.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 06.09.1952, erstellt von Gaston Coutrez, Observatoire Royal de Belgique in Uccle
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1952

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Zeichnung nach eigener Vorlage in Uccle.
Instrument: Merz-Grubb Refraktor Teleskop (Öffnung 160 mm, f = 2450 mm, projiziertes Sonnenbild D = 25 cm)
Impact of strain and field ramp functional form on thermomagnetic instabilities in composite Nb3Sn wires with multi-filaments inside the superconducting coil
Creators: name: Wang, Q. -Y.
name: Li, J. -B.
name: He, A.
name: Liu, W.
name: Xue, C.
name: Zhou, Y. -H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We theoretically analyze the effects of Cu/SC (superconductor) ratio, strain, and the ramp path on thermomagnetic instabilities of the superconducting coil. By considering the multi-filamentary structures, we find that a lower Cu/SC ratio leads to higher temperature peaks. The strain causes a higher frequency of flux jumps and higher voltage peaks. The temperatures recover to working temperature more difficultly and SC wires quench earlier in the presence of strain. For the jagged ramp cases, few flux jumps occur at the decreasing branch, whereas frequent flux jumps can be observed promptly when the applied current exceeds the pre-existing peak. Our simulated results agree well with experimental observations in Nb3Sn coils. Additionally, unlike the pulsed flux jumps observed in linear ramp cases, giant and prolonged flux jumps are observed at the increasing branch with a sinusoidal ramp path when the applied current is sufficiently large.
description: 17 pages, 9 figures
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 27.08.1952, erstellt von Gaston Coutrez, Observatoire Royal de Belgique in Uccle
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1952

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Zeichnung nach eigener Vorlage in Uccle.
Instrument: Merz-Grubb Refraktor Teleskop (Öffnung 160 mm, f = 2450 mm, projiziertes Sonnenbild D = 25 cm)
Commencement, Salisbury University, Spring 2001
Creators: name: (:Unkn) Unknown
Publisher: name: Maryland Shared Open Access Repository
Year: 2001
Subjects: Salisbury (Md.)
Salisbury State University
Commencement ceremonies

description: Commencement ceremonies at have been held for graduates at Salisbury University since 1926, sometimes after each semester but typically in the spring. Programs always list the names of graduates and occasionally list hometown, degree, or major.
Controlled transport based on multiorbital Aharonov-Bohm photonic caging
Creators: name: Cáceres-Aravena, Gabriel
name: Guzmán-Silva, Diego
name: Salinas, Ignacio
name: Vicencio, Rodrigo A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Other Condensed Matter (cond-mat.other)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The induction of synthetic magnetic fields on lattice structures allows to effectively control their localization and transport properties. In this work, we generate effective $π$ magnetic fluxes on a multi-orbital diamond lattice, where first ($S$) and second ($P$) order modes effectively interact. We implement a $z$-scan method on femtosecond laser written photonic lattices and experimentally observe Aharonov-Bohm caging for $S$ and $P$ modes, as a consequence of a band transformation and the emergence of a spectrum composed of three degenerated flat bands. As an application, we demonstrate a perfect control of the dynamics, where we translate an input excitation across the lattice in a completely linear and controlled way. Our model, based on a flat band spectrum, allows us to choose the direction of transport depending on the excitation site or input phase.
description: 6 pages, 3 figures
Biasakan yang Betul, Perbaiki yang Salah. Penggunaan Kata Baru dan Baharu
Creators: name: Ating, Rashid
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 460105
subject: Applications in social sciences and education
classificationCode: 390107
subject: Humanities and social sciences curriculum and pedagogy (excl. economics, business and management)

description: Artikel pendek ini menjelaskan pengunaan perkataan "baru" dan "baharu" mengikut keadaan dan konteks yang berbeza. Beberapa contoh diberikan oleh penulis untuk menambahkan lagi kefahaman para pembaca mengenai pengunaan dua perkataan ini.
Sonnenfleckenzeichnung, unnummeriert.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 06.05.1952, erstellt von Gaston Coutrez, Observatoire Royal de Belgique in Uccle
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1952

description: Bleistiftzeichnung mit Tinte und Farbstift, erstellt als Zeichnung nach eigener Vorlage in Uccle.
Instrument: Merz-Grubb Refraktor Teleskop (Öffnung 160 mm, f = 2450 mm, projiziertes Sonnenbild D = 25 cm)