cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Semicircular limits on the free Poisson chaos: counterexamples to a transfer principle
Creators: name: Bourguin, Solesne
name: Peccati, Giovanni
Publisher: name: arXiv
Year: 2013
Subjects: subject: Operator Algebras (math.OA)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: We establish a class of sufficient conditions, ensuring that a sequence of multiple integrals with respect to a free Poisson measure converges to a semicircular limit. We use this result to construct a set of explicit counterexamples, showing that the transfer principle between classical and free Brownian motions (recently proved by Kemp, Nourdin, Peccati and Speicher (2012)) does not extend to the framework of Poisson measures. Our counterexamples implicitly use kernels appearing in the classical theory of random geometric graphs. Several new results of independent interest are obtained as necessary steps in our analysis, in particular: (i) a multiplication formula for free Poisson multiple integrals, (ii) diagram formulae and spectral bounds for these objects, and (iii) a counterexample to the general universality of the Gaussian Wiener chaos in a classical setting.
The meaning of gender equality in the European Employment Strategy
Creators: name: Villa, Paola
Publisher: name: Dipartimento di Sociologia e Ricerca Sociale CSG - Centro di Studi Interdisciplinari di Genere (Universit� degli Studi di Trento)
Year: 2015

description: The paper presents a critical analysis of the European Employment Strategy (EES), considering the evolution of its formulation since its launch in 1997. The purpose is to verify whether the pursuit of the quantitative target in terms of an increase in the female employment rate has been matched by the pursuit of gender equality. The question investigated is whether the emphasis on gender equality and equal opportunities between women and men in the labour market - quite visible in the early formulation of the EES - refects a concern with the pursuit of gender equality as a goal in itself, or whether gender equality in the labour market is conceived as a tool necessary for the achievement of the overall employment targets agreed at the EU level.
L?eredit� di Giambologna in Tirolo: Hans Reichle, scultore tra Firenze e la Baviera
Creators: name: Padovani, Francesca
Publisher: name: Universit� degli studi di Trento
Year: 2021

description: La tesi consiste in uno studio monografico aggiornato, il primo in lingua italiana, dedicato allo scultore bavarese Hans Reichle, che fu un abile interprete della Maniera fiorentina al di l� e al di qua delle Alpi. Il bavarese frequent� la bottega di Giambologna dal 1587 c. al 1594, anni di intenso studio durante i quali gett� le basi sulle quali costru� il successo di una vita: la memoria degli anni fiorentini e l?influenza del maestro si percepiscono in tutte le opere del catalogo del bavarese, dagli esordi fino alla piena maturit�. La tesi � dedicata interamente all?esame della vita e dell?attivit� dello scultore. Inizialmente si ripercorre la biografia di Reichle, esaminando le opere realizzate nel corso della vita e il prestigio che queste guadagnarono. In questa prima parte emerge l?evoluzione del linguaggio dello scultore e, in particolare, il suo cimentarsi con tecniche che finora gli studi non avevano ammesso nel catalogo: si tratta di importanti novit� che gettano luce su aspetti del tutto inediti della carriera dello scultore. Invece nella seconda parte della tesi si discutono alcuni casi-studio relativi alle imprese principali di Reichle. Un capitolo � poi dedicato all?eredit� lasciata dallo scultore in Tirolo e agli allievi e collaboratori che affiancarono Reichle nel corso della sua vita. Le ultime due parti della tesi sono dedicate all?esame dell?inventario inedito del bavarese - che ha portato alla luce significative novit� relative tanto alla biografia quanto alla sua attivit� - al catalogo delle opere di Reichle e dei suoi allievi, e infine all'appendice documentaria.
The Pelican and the Wintamarra Tree: voci della letteratura aborigena australiana
Creators: name: Di Blasio, Francesca
Publisher: name: Universit� degli Studi di Trento. Dipartimento di scienze filologiche e storiche
Year: 2005

description: Il volume propone un quadro della letteratura aborigena australiana contemporanea, in particolare della scrittura autobiografica delle donne, e si inserisce in un panorama critico-letterario sostanzialmente inedito in Italia. Le contro-storie degli Aborigeni australiani sono ancora oggi avvolte in una cortina di silenzio che va squarciata. The Pelican and the Wintamarra Tree contribuisce a consegnare alla visibilit� e alla conoscenza dei lettori i testi che ri-costruiscono la storia del popolo aborigeno. Le opere per lo pi� autobiografiche di Alice Nannup, Nugi Garimara, Ruth Hegarty, Rita Huggins divengono specchio della riappropriazione di spazi e tempi che sono ormai recuperabili solo attraverso la memoria. Nonostante questo, o forse proprio per questo, esse devono diventare e restare un vivo e prezioso patrimonio culturale comune.
First gravitational lensing mass estimate of a damped Lyman-alpha galaxy at z=2.2
Creators: name: Grillo, C.
name: Fynbo, J. P. U.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the first lensing total mass estimate of a galaxy, at redshift 2.207, that acts as a gravitational deflector and damped Lyman-alpha absorber on the background QSO SDSS J1135-0010, at redshift 2.888. The remarkably small projected distance, or impact parameter, between the lens and the source has been estimated to be 0.8 +/- 0.1 kpc in a recent work. By exploiting the Sloan Digital Sky Survey database, we establish a likely lensing magnification signal in the photometry of the QSO. This is determined to be 2.2 mag brighter (or 8 times more luminous) than the median QSO at comparable redshifts. We describe the total mass distribution of the lens galaxy with a one-component singular isothermal sphere model and contrast the values of the observed and model-predicted magnification factors. For the former, we use conservatively the photometric data of the 95% of the available distant QSO population. We estimate that the values of the lens effective velocity dispersion and two-dimensional total mass, projected within a cylinder with radius equal to the impact parameter, are included between 60 and 170 km/s and 2.1 x 10^9 and 1.8 x 10^10 M_Sun, respectively. We conclude by remarking that analyses of this kind are crucial to exploring the relation between the luminous and dark matter components of galaxies in the high-redshift Universe.
description: 5 pages, 3 figures, accepted by MNRAS
Transcriptions of La Belle Hélène de Constantinople (Benoît Rigaud, Lyon)
Creators: name: DOURDY, LAURA MAI
Publisher: name: Zenodo
Year: 2022
Subjects: Printed book
Benoît Rigaud
Belle Hélène de Constantinople

description: Tradition: La Belle Hélène de Constantinople anonyme en prose; Literary genre: chivalry fiction; Printer editor: Benoît Rigaud; Edition date: 1593; Shelfmark of the transcribed edition: Augsbourg, SuStB, LA – 5304.
Labeled Directed Acyclic Graphs: a generalization of context-specific independence in directed graphical models
Creators: name: Pensar, Johan
name: Nyman, Henrik
name: Koski, Timo
name: Corander, Jukka
Publisher: name: arXiv
Year: 2013
Subjects: subject: Machine Learning (stat.ML)
subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: We introduce a novel class of labeled directed acyclic graph (LDAG) models for finite sets of discrete variables. LDAGs generalize earlier proposals for allowing local structures in the conditional probability distribution of a node, such that unrestricted label sets determine which edges can be deleted from the underlying directed acyclic graph (DAG) for a given context. Several properties of these models are derived, including a generalization of the concept of Markov equivalence classes. Efficient Bayesian learning of LDAGs is enabled by introducing an LDAG-based factorization of the Dirichlet prior for the model parameters, such that the marginal likelihood can be calculated analytically. In addition, we develop a novel prior distribution for the model structures that can appropriately penalize a model for its labeling complexity. A non-reversible Markov chain Monte Carlo algorithm combined with a greedy hill climbing approach is used for illustrating the useful properties of LDAG models for both real and synthetic data sets.
description: 26 pages, 17 figures
Discovery of New Layered Iron Arsenide Superconductor (Ca,Pr)FeAs2
Creators: name: Yakita, Hiroyuki
name: Ogino, Hiraku
name: Okada, Tomoyuki
name: Yamamoto, Akiyasu
name: Kishio, Kohji
name: Tohei, Tetsuya
name: Ikuhara, Yuichi
name: Gotoh, Yoshito
name: Fujihisa, Hiroshi
name: Kataoka, Kunimitsu
name: Eisaki, Hiroshi
name: Shimoyama, Jun-ichi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A new iron-based superconductor (Ca,Pr)FeAs2 was discovered. Plate-like crystals of the new phase were obtained and crystal structure was investigated by single-crystal X-ray diffraction analysis. The structure was identified as the monoclinic system with space group P21/m, and is composed of two Ca(Pr) planes, anti-fluorite Fe2As2 layers, and As2 zigzag chain layers. Plate-like crystals composed of the new phase showed superconductivity with Tc ~20 K in both magnetization and resistivity measurements.
description: 5 pages, 1 table, 6 figures
Individual project on theme "Plantago major L." (MOOC: CompTech in biology)
Creators: name: Bogdanova Elena
Publisher: name: Zenodo
Year: 2023

description: Данная презентация является результатом реализации индивидуального проекта Богдановой Елены по теме "Plantago major L."в рамках онлайн курса "Компьютерные технологии в биологии"(автор - А.В.Ваганов)(https://stepik.org/course/60859/promo)
Varying [CII]/[NII] line ratios in the interacting system BR1202-0725 at z=4.7
Creators: name: Decarli, R.
name: Walter, F.
name: Carilli, C.
name: Bertoldi, F.
name: Cox, P.
name: Ferkinhoff, C.
name: Groves, B.
name: Maiolino, R.
name: Neri, R.
name: Riechers, D.
name: Weiss, A.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the properties of the interstellar medium in the interacting system BR1202-0725 at z=4.7 via its [NII] and [CII] fine-structure line emission. This system consists of a QSO, a sub-mm galaxy (SMG), and two Ly-alpha emitters (LAEs). Such a diversity in galaxy properties makes BR1202-0725 a unique laboratory of star formation and galaxy evolution at high redshift. We present ionized nitrogen ([NII] 205 micron) observations of this system, obtained with the IRAM Plateau de Bure Interferometer. We find no [NII] emission at the quasar location, but tentative [NII] line detections associated with the SMG and one of the LAEs. Together with available ionized carbon ([CII] 158 micron) ALMA observations of this system, we find the following: The [CII]/[NII] luminosity ratio is >5.5 for the QSO and the SMG, but it is as low as ~2 in the LAE, suggesting that, in this source, most of the [CII] emission is associated with the ionized medium (HII regions) rather than the neutral one (PDRs). This study demonstrates the importance of combined studies of multiple fine--structure lines in order to pin down the physical properties of the interstellar medium in distant galaxies.
description: 3 figures. Accepted for publication in ApJ Letters
Integrability in differential coverings
Creators: name: Krasil'shchik, I.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Differential Geometry (math.DG)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 37K05, 37K10, 37K35

description: Let $τ\colon\tilde{\mathcal{E}}\to\mathcal{E}$ be a differential covering of a PDE $\tilde{\mathcal{E}}$ over $\mathcal{E}$. We prove that if $\mathcal{E}$ possesses infinite number of symmetries and/or conservation laws then $\tilde{\mathcal{E}}$ has similar properties.
Erhöhung sozialer Eingebundenheit in digitalen Lernsettings – Reicht die Einführung einer digitalen Lernplattform aus?
Increasing social belonging in digital and self-directed learning settings – is the introduction of a digital learning platform sufficient?
Creators: name: Merz, Nora
name: Rack, Oliver
name: Schlatter, Monika
Publisher: name: Forum Neue Medien in der Lehre Austria
Year: 2024
Subjects: subject: 300 - Sozialwissenschaften, Soziologie, Anthropologie
subject: 150 - Psychologie

description: Die digitale Transformation führt an Hochschulen zum vermehrten Einsatz digital unterstützter Lernsettings. Dadurch stellt sich die praxisrelevante Frage, wie sich die Einführung einer digitalen Lernplattform auf die soziale Eingebundenheit von Studierenden auswirkt. Durch Interviews (N=10) und eine Fragebogenerhebung (N=35) wurde untersucht, welchen Einfluss technische Features einer digitalen Lernplattform auf die soziale Eingebundenheit in einem Studiengang besitzen. Die Ergebnisse zeigen, dass nicht die technischen Features allein, sondern die Rahmenbedingungen einer digitalen Lernplattform sowie Kontaktangebote von Bedeutung für die soziale Eingebundenheit von Studierenden sind. Ergebnisse und Handlungsempfehlungen werden diskutiert.
Superconductivity in Ca1-xLaxFeAs2: A Novel 112-Type Iron Pnictide with Arsenic Zigzag Bonds
Creators: name: Katayama, Naoyuki
name: Kudo, Kazutaka
name: Onari, Seiichiro
name: Mizukami, Tasuku
name: Sugawara, Kento
name: Sugiyama, Yuki
name: Kitahama, Yutaka
name: Iba, Keita
name: Fujimura, Kazunori
name: Nishimoto, Naoki
name: Nohara, Minoru
name: Sawa, Hiroshi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We report superconductivity in the novel 112-type iron-based compound Ca1-xLaxFeAs2. Single-crystal X-ray diffraction analysis revealed that the compound crystallizes in a monoclinic structure (space group P21), in which Fe2As2 layers alternate with Ca2As2 spacer layers such that monovalent arsenic forms zigzag chains. Superconductivity with a transition temperature (Tc) of 34 K was observed for the x = 0.1 sample, while the x = 0.21 sample exhibited trace superconductivity at 45 K. First-principles band calculations demonstrated the presence of almost cylindrical Fermi surfaces, favorable for the high Tc in La-doped CaFeAs2.
description: 10 pages, 4 figures
Forming misaligned stellar discs around a massive black hole: Cloud infall in the Galactic Centre
Creators: name: Lucas, William
name: Bonnell, Ian
name: Davies, Melvyn
name: Rice, Ken
Publisher: name: arXiv
Year: 2014
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The innermost parsec around Sgr A* has been found to play host to two discs or streamers of O and W-R stars. They are misaligned by an angle approaching 90 degrees. That the stars are approximately coeval indicates that they formed in the same event rather than independently. We have performed SPH simulations of the infall of a single prolate cloud towards a massive black hole. As the cloud is disrupted, the large spread in angular momentum can, if conditions allow, lead to the creation of misaligned gas discs. In turn, stars may form within those discs. We are now investigating the origins of these clouds in the Galactic Centre (GC) region.
description: To appear in the Proceedings of the IAU Symposium 303: The Galactic Center: Feeding and Feedback in a Normal Galactic Nucleus
Anomalous crossed Andreev reflection in mesoscopic superconducting ring hosting Majorana fermions
Creators: name: Lee, Minchul
name: Khim, Heunghwan
name: Choi, Mahn-Soo
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the Majorana physics and its effect on the electron transport in the non-topological superconductor(NS)-topological superconductor(TS) double junctions of a ring geometry. We find that, depending on the ratio between the lengths of two topologically different regions and the localization lengths of the Majorana fermions formed between them, two completely different transport mechanisms are working: perfect crossed Andreev reflection (CAR) for the short NS region and perfect normal Andreev reflection for the short TS region. The difference is explained in terms of the topologically distinct properties of subgap states in the NS-TS double junction system, which have not been revealed so far. The exotic dependence of the CAR process on the magnetic flux threading the ring is uncovered and can be used to detect the Majorana fermions.
description: 15 pages, 21 figures
Superfamilia Pentatomoidea
Creators: name: Grazia, Jocélia
name: Fortes, Nora Denise F. de
name: Campos, Luiz Alexandre
Publisher: name: Zenodo
Year: 1999

description: A superfamília Pentatomoidea reúne os chamados percevejos-de-plantas. Embora a maioria possua hábitos fitófagos, se alimentando de diversas partes da planta, a subfamília Asopinae apresenta hábitos predadores. Entre os fitófagos há registro de várias espécies que constituem pragas de plantas cultivadas e entre os predadores algumas espécies têm ação efetiva como controladores biológicos de pragas. De tamanho variável entre 2 a 20mm, predominam os de tamanho médio, corpo geralmente ovalado; coloração escura, castanha ou negra, às vezes brilhante e até iridescente, na maioria das famílias. Entretanto, a coloração viva, aposemática pode ocorrer em alguns grupos, bem como a mimetização com o substrato, característica de alguns grupos neotropicais. Em São Paulo, com exceção do Museu de Zoologia da USP, que possui uma razoável coleção de pentatomóideos, todas as demais coleções são pequenas e centradas em espécies de interesse agrícola, provavelmente devido ao fato de não ter havido um especialista no grupo atuando neste estado. De certa forma, esta também é uma das razões pelas quais a fauna de Pentatomoidea é pouco conhecida. Coletas devem ser realizadas, de uma maneira geral, em todo o estado, porém uma atenção especial deveria ser dada às áreas florestadas do sul e aos cerradões do oeste de São Paulo. Não há registro de espécies ameaçadas de extinção, mas sem dúvida inúmeras espécies já deixaram de existir, sem mesmo terem sido descritas, com a modificação da paisagem e destruição de ambientes nos últimos cinqüenta anos.
A Joint Model Of X-ray And Infrared Backgrounds. II. Compton-Thick AGN Abundance
Creators: name: Shi, Yong
name: Helou, George
name: Armus, Lee
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We estimate the abundance of Compton-thick (CT) active galactic nuclei (AGN) based on our joint model of X-ray and infrared backgrounds. At L_{rest 2-10 keV} > 10^42 erg/s, the CT AGN density predicted by our model is a few 10^-4 Mpc^-3 from z=0 up to z=3. CT AGN with higher luminosity cuts (> 10^43, 10^44 & 10^45 erg/s) peak at higher z and show a rapid increase in the number density from z=0 to z~2-3. The CT to all AGN ratio appears to be low (2-5%) at f_{2-10keV} > 10^-15 erg/s/cm^2 but rises rapidly toward fainter flux levels. The CT AGN account for ~ 38% of the total accreted SMBH mass and contribute ~ 25% of the cosmic X-ray background spectrum at 20 keV. Our model predicts that the majority (90%) of luminous and bright CT AGN (L_{rest 2-10 keV} > 10^44 erg/s or f_{2-10keV} > 10^-15 erg/s/cm^2) have detectable hot dust 5-10 um emission which we associate with a dusty torus. The fraction drops for fainter objects, to around 30% at L_{rest 2-10 keV} > 10^42 erg/s or f_{2-10keV} > 10^-17 erg/s/cm^2. Our model confirms that heavily-obscured AGN (N_HI > 10^23 cm^-2) can be separated from unobscured and mildly-obscured ones (N_HI < 10^23 cm^-2) in the plane of observed-frame X-ray hardness vs. mid-IR/X-ray ratio.
description: 8 pages, 9 figures, accepted for ApJ
Osteoporosis: Pathophysiology and therapeutic options
Creators: name: Föger-Samwald, Ursula
name: Dovjak, Peter
name: Azizi-Semrad, Ursula
name: Kerschan-Schindl, Katharina
name: Pietschmann, Peter
Publisher: name: IfADo - Leibniz Research Centre for Working Environment and Human Factors, Dortmund
Year: 2020
Subjects: osteoporosis
pathophysiology
osteoimmunology
gut microbiome
senescence
osteoporosis treatment

description: Osteoporosis is a metabolic bone disease that, on a cellular level, results from osteoclastic bone resorption not compensated by osteoblastic bone formation. This causes bones to become weak and fragile, thus increasing the risk of fractures. Traditional pathophysiological concepts of osteoporosis focused on endocrine mechanisms such as estrogen or vitamin D deficiency as well as secondary hyperparathyroidism. However, research over the last decades provided exiting new insights into mechanisms contributing to the onset of osteoporosis, which go far beyond this. Selected mechanisms such as interactions between bone and the immune system, the gut microbiome, and cellular senescence are reviewed in this article. Furthermore, an overview on currently available osteoporosis medications including antiresorptive and bone forming drugs is provided and an outlook on potential future treatment options is given.
description: EXCLI Journal; 19:Doc1017; ISSN 1611-2156
Contributions to the knowledge of Elanela: Elanela jordi sp. nov., from Amazonas, Brazil (Hemiptera: Heteroptera: Pentatomidae)
Creators: name: Grazia, J.
name: Greve, C.
Publisher: name: Zenodo
Year: 2011

description: A new species of Elanela Rolston, 1980, E. jordi sp. nov. is described from Amazonas, Brazil. The female genitalia of E. kerzhneri Grazia & Silva, 2006 is also described. A key to separate the known species of Elanela is provided.
Review on Fragment Allocation by using Clustering Technique in Distributed Database System
Creators: name: Dash, Priyanka
name: Rout, Ranjita
name: Pratihari, Satya Bhusan
name: Padhi, Sanjay Kumar
Publisher: name: arXiv
Year: 2013
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences

description: Considerable Progress has been made in the last few years in improving the performance of the distributed database systems. The development of Fragment allocation models in Distributed database is becoming difficult due to the complexity of huge number of sites and their communication considerations. Under such conditions, simulation of clustering and data allocation is adequate tools for understanding and evaluating the performance of data allocation in Distributed databases. Clustering sites and fragment allocation are key challenges in Distributed database performance, and are considered to be efficient methods that have a major role in reducing transferred and accessed data during the execution of applications. In this paper a review on Fragment allocation by using Clustering technique is given in Distributed Database System.
description: 9 pages,3 figures
RISIS DATASET RISIS Patent Database PROGRESS REPORT - January 2019 – June 2020
Creators: name: PATRICIA, LAURENS
Publisher: name: Zenodo
Year: 2020
Subjects: Patents, inventions, database

description: This report presents the activities and developments made on the Risis Patent Database during the M1-M18 period of RISIS2. It summarises the maintenance activities to achieve a complete, stabilised version of the Risis Patent Database and also describes some uses made of the Risis Patent Database for research project. The report also provides information on the next steps, i.e. the identification of academic patents in Risis Patent Database
VLBI Observation of Microquasar Cyg X-3 during an X-ray State Transition from Soft to Hard in the 2007 May-June Flare
Creators: name: Kim, Jeong-Sook
name: Kim, Soon-Wook
name: Kurayama, Tomoharu
name: Honma, Mareki
name: Sasao, Tetsuo
name: Kim, Sang Joon
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present a radio observation of microquasar Cyg X-3 during an X-ray state transition from ultrasoft to hard state in the 2007 May$-$June flare using the VLBI Exploration of Radio Astrometry (VERA) at 22 GHz. During the transition, a short-lived mini-flare of ${\lesssim}3$ hr was detected prior to the major flare. In such a transition, a jet ejection is believed to occur, but there have been no direct observations to support it. An analysis of Gaussian fits to the observed visibility amplitudes shows a time variation of the source axis, or a structural change, during the mini-flare. Our model fits, together with other multiwavelength observations in the radio, soft, and hard X-rays, and the shock-in-jet models for other flaring activities at GHz wavebands, suggest a high possibility of synchrotron flares during the mini-flare, indicative of a predominant contribution from jet activity. Therefore, the mini-flare with an associated structural change is indicative of a jet ejection event in the state transition from ultrasoft to hard state.
description: 12 pages, 3 figures, accepted for publication in ApJ
The synthesis and characterization of 1111-type diluted magnetic semiconductors (La1-xSrx)(Zn1-xTMx)AsO (TM = Mn, Fe, Co)
Creators: name: Lu, Jicai
name: Man, Huiyuan
name: Ding, Cui
name: Wang, Quan
name: Yu, Biqiong
name: Guo, Shengli
name: Wang, Hangdong
name: Chen, Bin
name: Han, Wei
name: Jin, Changqing
name: Uemura, Yasutomo J.
name: Ning, F. L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: The doping effect of Sr and transition metals Mn, Fe, Co into the direct-gap semiconductor LaZnAsO has been investigated. Our results indicate that the single phase ZrCuSiAs-type tetragonal crystal structure is preserved in (La1-xSrx)(Zn1-xTMx)AsO (TM = Mn, Fe, Co) with the doping level up to x = 0.1. While the system remains semiconducting, doping with Sr and Mn results in ferromagnetic order with TC ~ 30K, and doping with Sr and Fe results in a spin glass like state below ~6K with a saturation moment of ~0.02 muB/Fe, an order of magnitude smaller than the ~0.4 muB/Mn of Sr and Mn doped samples. The same type of magnetic state is observed neither for (Zn,Fe) substitution without carrier doping, nor for Sr and Co doped specimens.
description: Accepted for publication in EPL
Rational F-Theory GUTs without exotics
Creators: name: Krippendorf, Sven
name: Pena, Damian Kaloni Mayorga
name: Oehlmann, Paul-Konstantin
name: Ruehle, Fabian
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We construct F-theory GUT models without exotic matter, leading to the MSSM matter spectrum with potential singlet extensions. The interplay of engineering explicit geometric setups, absence of four-dimensional anomalies, and realistic phenomenology of the couplings places severe constraints on the allowed local models in a given geometry. In constructions based on the spectral cover we find no model satisfying all these requirements. We then provide a survey of models with additional U(1) symmetries arising from rational sections of the elliptic fibration in toric constructions and obtain phenomenologically appealing models based on SU(5) tops. Furthermore we perform a bottom-up exploration beyond the toric section constructions discussed in the literature so far and identify benchmark models passing all our criteria, which can serve as a guideline for future geometric engineering.
description: 27 Pages, 1 Figure
Oblique breathers generated by a flow of two-component Bose-Einstein condensate past a polarized obstacle
Creators: name: Kamchatnov, A. M.
name: Kartashov, Y. V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We predict that oblique breathers can be generated by a flow of two-component Bose-Einstein condensate past a polarized obstacle which attracts one component of the condensate and repels the other one. The breather exists if intra-species interaction constants differ from the inter-species interaction constant and it corresponds to the nonlinear excitation of the so-called polarization mode with domination of the relative motion of the components. Approximate analytical theory is developed for the case of small-amplitude breathers that is in reasonable agreement with the exact numerical results.
description: 5 pages, 5 figures
Nonhydrostatic Effects and the Determination of Icy Satellites' Moment of Inertia
Creators: name: Gao, Peter
name: Stevenson, David J.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We compare the moment of inertia (MOI) of a simple hydrostatic, two layer body as determined by the Radau-Darwin Approximation (RDA) to its exact hydrostatic MOI calculated to first order in the parameter q = w^2R^3/GM, where w, R, and M are the spin angular velocity, radius, and mass of the body, and G is the gravitational constant. RDA is in error by less than 1% for many configurations of core sizes and layer densities congruent with those of solid bodies in the Solar System. We determine the error in the MOI of icy satellites calculated with the RDA due to nonhydrostatic effects by using a simple model in which the core and outer shell have slight degree 2 distortions away from their expected hydrostatic shapes. Since the hydrostatic shape has an associated stress of order pw^2R^2 (where p is density) it follows that the importance of nonhydrostatic effects scales with the dimensionless number s/pw^2R^2, where s is the nonhydrostatic stress. This highlights the likely importance of this error for slowly rotating bodies (e.g., Titan and Callisto) and small bodies (e.g., Saturn moons other than Titan). We apply this model to Titan, Callisto, and Enceladus and find that the RDA-derived MOI can be 10% greater than the actual MOI for nonhydrostatic stresses as small as ~0.1 bars at the surface or ~1 bar at the core-mantle boundary, while for Ganymede the stresses necessary to produce the same MOI errors are an order of magnitude greater due to its faster rotation. If satellites can reorient to the lowest energy state then RDA will always give an overestimate of the true MOI. Observations have shown that small nonhydrostatic gravity anomalies exist on Ganymede and Titan. We conclude that nonhydrostatic effects could be present to an extent that allows Callisto and Titan to be fully differentiated.
description: 25 pages, 3 figures, 1 table. Accepted for publication in Icarus
Statistical mechanics of collisionless orbits. IV. Distribution of angular momentum
Creators: name: Williams, Liliya L. R.
name: Hjorth, Jens
name: Wojtak, Radoslaw
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: It has been shown in previous work that DARKexp, which is a theoretically derived, maximum entropy, one shape parameter model for isotropic collisionless systems, provides very good fits to simulated and observed dark-matter halos. Specifically, it fits the energy distribution, N(E), and the density profiles, including the central cusp. Here, we extend DARKexp N(E) to include the distribution in angular momentum, L^2, for spherically symmetric systems. First, we argue, based on theoretical, semi-analytical, and simulation results, that while dark-matter halos are relaxed in energy, they are not nearly as relaxed in angular momentum, which precludes using maximum entropy to uniquely derive N(E,L^2). Instead, we require that when integrating N(E,L^2) over squared angular momenta one retrieves the DARKexp N(E). Starting with a general expression for N(E,L^2) we show how the distribution of particles in L^2 is related to the shape of the velocity distribution function, VDF, and velocity anisotropy profile, β(r). We then demonstrate that astrophysically realistic halos, as judged by the VDF shape and β(r), must have linear or convex distributions in L^2, for each separate energy bin. The distribution in energy of the most bound particles must be nearly flat, and become more tilted in favor of radial orbits for less bound particles. These results are consistent with numerical simulations and represent an important step towards deriving the full distribution function for spherically symmetric dark-matter halos.
description: 17 pages, 10 figures, accepted to ApJ. The first three in this series are: Paper I: arXiv:1010.0265, Paper II: arXiv:1010.0266, Paper III: arXiv:1010.0267
Role of the sample thickness in planar crack propagation
Creators: name: Barai, Pallab
name: Nukala, Phani K. V. V.
name: Alava, Mikko J.
name: Zapperi, Stefano
Publisher: name: arXiv
Year: 2013
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the effect of the sample thickness in planar crack front propagation in a disordered elastic medium using the random fuse model. We employ different loading conditions and we test their stability with respect to crack growth. We show that the thickness induces characteristic lengths in the stress enhancement factor in front of the crack and in the stress transfer function parallel to the crack. This is reflected by a thickness-dependent crossover scale in the crack front morphology that goes from from multi-scaling to self-affine with exponents in agreement with line depinning models and experiments. Finally, we compute the distribution of crack avalanches which is shown to depend on the thickness and the loading mode.
description: 8 pages, 11 figures
Numerical integration on GPUs for higher order finite elements
Creators: name: Banaś, Krzysztof
name: Płaszewski, Przemysław
name: Macioł, Paweł
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Software (cs.MS)
subject: FOS: Computer and information sciences

description: The paper considers the problem of implementation on graphics processors of numerical integration routines for higher order finite element approximations. The design of suitable GPU kernels is investigated in the context of general purpose integration procedures, as well as particular example applications. The most important characteristic of the problem investigated is the large variation of required processor and memory resources associated with different degrees of approximating polynomials. The questions that we try to answer are whether it is possible to design a single integration kernel for different GPUs and different orders of approximation and what performance can be expected in such a case.
Simulation of energy scan of pion interferometry in central Au + Au collisions at relativistic energies
Creators: name: Zhang, Z. Q.
name: Zhang, S.
name: Ma, Y. G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a systematic analysis of two-pion interferometry for the central Au+Au collisions at $\sqrt{S_{NN}}$ = 3, 5, 7, 11, 17, 27, 39, 62, 130 and 200 GeV/c with the help of a multiphase transport (AMPT) model. Emission source-size radius parameters $R_{long}$, $R_{out}$, $R_{side}$ and the chaotic parameter $λ$ are extracted and compared with the experimental data. Transverse momentum and azimuthal angle dependencies of the HBT radii are also discussed for central Au+Au collisions at 200 GeV/c. The results show that the HBT radii in central collisions do not change much above 7 GeV/c. For central collisions at 200GeV/c, the radii decrease with the increasing of transverse momentum $p_{T}$ but not sensitive to the azimuthal angle. These results provide a theoretical reference for the energy scan program of the RHIC-STAR experiment.
description: 4 pages, 4 figures; submitted to Chinese Physics C
O Beijo: A tragédia de Francesca e Paolo
Creators: name: Gil, Francisco Baptista
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 360102
subject: Art history

description: A escultura, hoje conhecida como “O beijo” (Le Baiser), foi uma das esculturas excluídas do projeto das Portas do Inferno, que originalmente foi pensada para a coluna da direita. Rodin decidiu não a incluir na composição final, mas apresentou-o ao público em 1877 como uma escultura autónoma. A obra teve um sucesso imediato e foi reproduzida em mármore e bronze em vários tamanhos.
The incidence of obscuration in active galactic nuclei
Creators: name: Merloni, A.
name: Bongiorno, A.
name: Brusa, M.
name: Iwasawa, K.
name: Mainieri, V.
name: Magnelli, B.
name: Salvato, M.
name: Berta, S.
name: Cappelluti, N.
name: Comastri, A.
name: Fiore, F.
name: Gilli, R.
name: Koekemoer, A.
name: Floc'h, E. Le
name: Lusso, E.
name: Lutz, D.
name: Miyaji, T.
name: Pozzi, F.
name: Riguccini, L.
name: Rosario, D. J.
name: Silverman, J.
name: Symeonidis, M.
name: Treister, E.
name: Vignali, C.
name: Zamorani, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We study the incidence of nuclear obscuration on a complete sample of 1310 AGN selected on the basis of their rest-frame 2-10 keV X-ray flux from the XMM-COSMOS survey, in the redshift range 0.3
description: 18 pages, 17 figures, 2 tables. Accepted for publication by MNRAS
LIDT-DD: A new self-consistent debris disc model including radiation pressure and coupling dynamical and collisional evolution
Creators: name: Kral, Q.
name: Thebault, P.
name: Charnoz, S.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The first attempt at developing a fully self-consistent code coupling dynamics and collisions to study debris discs (Kral, Thebault, Charnoz, 2013) is presented. So far, these two crucial mechanisms were studied separately, with N-body and statistical collisional codes respectively, because of stringent computational constraints. In particular, incorporating collisional effects (especially destructive collisions) into an N-body scheme was deemed an impossible task because of the exponential increase of particles it would imply. We present here a new model named LIDT-DD which is able to follow over long timescales the coupled evolution of dynamics (including radiation pressure) and collisions in a self-consistent way.
description: 2 pages, 2 figures, Proceeding of the IAU 299 conference
Decomposition of EOS of Asymmetric Nuclear Matter into Different Spin-isospin Channels
Creators: name: Zuo, Wei
name: Zhou, Shan-Gui
name: Li, Jun-Qing
name: Zhao, En-Guang
name: Scheid, Werner
Publisher: name: arXiv
Year: 2013
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the equation of state of asymmetric nuclear matter and its isospin dependence in various spin-isospin $ST$ channels within the framework of the Brueckner-Hartree-Fock approach extended to include a microscopic three-body force (TBF). It is shown that the potential energy per nucleon in the isospin-singlet T=0 channel is mainly determined by the contribution from the tensor SD coupled channel. At high densities, the TBF effect on the isospin-triplet T=1 channel contribution turns out to be much larger than that on the T=0 channel contribution. At low densities around and below the normal nuclear matter density, the isospin dependence is found to come essentially from the isospin-singlet SD channel and the isospin-triplet T=1 component is almost independent of isospin-asymmetry. As the density increases, the T=1 channel contribution becomes sensitive to the isospin-asymmetry and at high enough densities its isospin-dependence may even become more pronounced than that of the T=0 contribution. The present results may provide some microscopic constraints for improving effective nucleon-nucleon interactions in nuclear medium and for constructing new functionals of effective nucleon-nucleon interaction based on microscopic many-body theories.
description: 5 pages, 3 figures
Data Management in  NFFA-DI : OFED (Overarching Fair Ecosystem for Data)
Creators: name: Bazzocchi, Federica
Publisher: name: Zenodo
Year: 2024
Subjects: FAIR Data Management

description: These slides describe  OFED (Overarching Fair Ecosystem for Data), the datalake that is going to be setup in the context of the  Nanoscience Foundries and Fine Analysis - Digital Infrastructure (NFFA-DI) project funded  by PNRR initiative. OFED is  a digital ecosystem that pursues FAIR data management and gives at disposal to users advanced data services.
Resource Allocation in a Network-Based Cloud Computing Environment: Design Challenges
Creators: name: Sharkh, Mohamed Abu
name: Jammal, Manar
name: Shami, Abdallah
name: Ouda, Abdelkader
Publisher: name: arXiv
Year: 2013
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: FOS: Computer and information sciences

description: Cloud computing is an increasingly popular computing paradigm, now proving a necessity for utility computing services. Each provider offers a unique service portfolio with a range of resource configurations. Resource provisioning for cloud services in a comprehensive way is crucial to any resource allocation model. Any model should consider both computational resources and network resources to accurately represent and serve practical needs. Another aspect that should be considered while provisioning resources is energy consumption. This aspect is getting more attention from industry and governments parties. Calls of support for the green clouds are gaining momentum. With that in mind, resource allocation algorithms aim to accomplish the task of scheduling virtual machines on data center servers and then scheduling connection requests on the network paths available while complying with the problem constraints. Several external and internal factors that affect the performance of resource allocation models are introduced in this paper. These factors are discussed in detail and research gaps are pointed out. Design challenges are discussed with the aim of providing a reference to be used when designing a comprehensive energy aware resource allocation model for cloud computing data centers.
description: To appear in IEEE Communications Magazine, November 2013
Investigation of cosmic ray-cloud connections using MISR
Creators: name: Krissansen-Totton, Joshua
name: Davies, Roger
Publisher: name: arXiv
Year: 2013
Subjects: subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Physical sciences

description: Numerous empirical studies have analyzed International Satellite Cloud Climatology Project data and reached contradictory conclusions regarding the influence of solar-modulated galactic cosmic rays on cloud fraction and cloud properties. The Multiangle Imaging Spectroradiometer (MISR) instrument on the Terra satellite has been in continuous operation for 13 years and thus provides an independent (and previously unutilized) cloud data set to investigate purported solar-cloud links. Furthermore, unlike many previous solar-climate studies that report cloud fraction MISR measures albedo, which has clearer climatological relevance. Our long-term analysis of MISR data finds no statistically significant correlations between cosmic rays and global albedo or globally averaged cloud height, and no evidence for any regional or lagged correlations. Moreover, epoch superposition analysis of Forbush decreases reveals no detectable albedo response to cosmic ray decreases, thereby placing an upper limit on the possible influence of cosmic ray variations on global albedo of 0.0029 per 5% decrease. The implications for recent global warming are discussed.
description: Includes main text, supplementary figures and supplementary text describing data
Non-local propagation of correlations in long-range interacting quantum systems
Creators: name: Richerme, Philip
name: Gong, Zhe-Xuan
name: Lee, Aaron
name: Senko, Crystal
name: Smith, Jacob
name: Foss-Feig, Michael
name: Michalakis, Spyridon
name: Gorshkov, Alexey V.
name: Monroe, Christopher
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The maximum speed with which information can propagate in a quantum many-body system directly affects how quickly disparate parts of the system can become correlated and how difficult the system will be to describe numerically. For systems with only short-range interactions, Lieb and Robinson derived a constant-velocity bound that limits correlations to within a linear effective light cone. However, little is known about the propagation speed in systems with long-range interactions, since the best long-range bound is too loose to give the correct light-cone shape for any known spin model and since analytic solutions rarely exist. In this work, we experimentally determine the spatial and time-dependent correlations of a far-from-equilibrium quantum many-body system evolving under a long-range Ising- or XY-model Hamiltonian. For several different interaction ranges, we extract the shape of the light cone and measure the velocity with which correlations propagate through the system. In many cases we find increasing propagation velocities, which violate the Lieb-Robinson prediction, and in one instance cannot be explained by any existing theory. Our results demonstrate that even modestly-sized quantum simulators are well-poised for studying complicated many-body systems that are intractable to classical computation.
Laser Induced Periodic Surface Structures Induced by Surface Plasmons Coupled via Roughness
Creators: name: Gurevich, E. L.
name: Gurevich, S. V.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this paper the formation mechanisms of the femtosecond laser-induced periodic surface structures (LIPSS) are discussed. One of the most frequently-used theories explains the structures by interference between the incident laser beam and surface plasmon-polariton waves. The latter is most commonly attributed to the coupling of the incident laser light to the surface roughness. We demonstrate that this excitation mechanism of surface plasmons contradicts to the results of laser-ablation experiments. As an alternative approach to the excitation of LIPSS we analyse development of hydrodynamic instabilities in the melt layer.