cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Pasto per buco nero al termine dell’universo
Creators: Redazione Media Inaf
Publisher: name: Media Inaf
Year: 2022

Osservato a distanza record – mai così lontano prima d’ora – e per la prima volta anche in banda ottica un buco nero supermassiccio intento a consumare una stella vicina ed emettere un getto quasi alla velocità della luce. Allo studio, pubblicato oggi in due articoli su Nature e Nature Astronomy, hanno preso parte anche ricercatori dell’Istituto nazionale di astrofisica
ПАХТАНИ ЕТИШТИРИШ АГРОТЕХНИКАСИ, ТЕРИМГА ТАЙЁРЛАШНИ ТАШКИЛЛАШТИРИШ ТАРТИБИ
Creators: name: Қабулов, Иброҳим
name: Юлдошева, Дилором
name: Унгаров, Азизбек
Publisher: name: Zenodo
Year: 2024

description: Ушбу мақолада турли мавзулар мисолида пахтани етиштириш агротехникасини янада ривожлантириш ҳақида таклифлар берилган.
Una fondazione per aiutare l’Università di Kharkiv
Creators: Marco Malaspina
Publisher: name: Media Inaf
Year: 2022

Un gruppo di sostenitori ucraini e stranieri ha dato vita a una fondazione per sostenere l’Università Karazin di Kharkiv, in Ucraina, con la quale l’Istituto nazionale di astrofisica ha sottoscritto già da qualche anno un accordo di collaborazione. Di cosa si occuperà? E qual è la situazione che si stanno trovando ad affrontare oggi i colleghi astronomi che lavorano – o lavoravano – a Kharkiv? Lo abbiamo chiesto al direttore scientifico dell’Inaf, Filippo Zerbi
BM3D-verfeinerte Zwischenbildsynthese für unterschiedlich aufgelöste Referenzansichten
Creators: name: Kaup, André
name: Richter, Thomas
name: Wige, Eugen
Publisher: name: Technische Universität Dortmund
Year: 2013
Subjects: subject: 620

description: Die Synthese unbekannter Zwischenansichten mit Hilfe von Tiefenkarten ist eine Kernaufgabe in der 3DVideosignalverarbeitung. Um ein hochqualitatives Zwischenbild generieren zu können, werden gewöhnlich mehrere hochaufgelöste Referenzansichten verwendet. Prinzipiell werden dabei die beiden benachbarten Kameraansichten mit Hilfe der entsprechenden Tiefeninformation in die Bildebene der Zielansicht projiziert und anschließend zusammengefügt.Im Normalfall bleiben nach dem Zusammenfügen der beiden Projektionsergebnisse nur noch sehr kleine Lochstrukturen übrig, die mit unterschiedlichen Interpolationsmethoden geschlossen werden können. Um die Kosten im Bezug auf das genutzte Kameraarray zu senken, könnten einige der hochauflösenden Kameras durch niedrigaufgelöste ersetzt werden. Diese niedrigauflösenden Kameras sind zwar billiger in der Anschaffung, liefern im Gegenzug aber auch eine deutlich schlechtere Bildqualität und beeinflussen damit das Ergebnis der Zwischenbildsynthese, besonders in Bildbereichen, die nur in der niedrigaufgelösten Referenz sichtbar sind. In diesem Beitrag wird die Fragestellung behandelt, wie ein Zwischenbild hoher Qualität aus zwei Kameraansichten generiert werden kann, die stark unterschiedliche Auflösungen und damit Bilder unterschiedlicher visueller Qualität liefern. Das Hauptaugenmerk dieser Arbeit liegt auf einem Nachverarbeitungsschritt, basierend auf dem BM3D-Verfahren, mit dem Ziel, Bildbereiche, die aus der niedrigaufgelösten Referenzansicht eingefügt wurden, an ihre hochaufgelöste Umgebung anzupassen. Die Simulationsergebnisse zeigen, dass die BM3D-Verfeinerung von synthetisierten Zwischenbildern zu einem PSNR-Gewinn von bis zu 0,51 dB auf dem gesamten Bild und 5,69 dB bezogen auf die Verfeinerungspositionen führt. Auch die visuelle Bildqualität lässt sichdurch die vorgeschlagene Nachverarbeitung deutlich steigern.
Mott-Hubbard transition in the mass-imbalanced Hubbard model
Creators: name: Philipp, Marie-Therese
name: Wallerberger, Markus
name: Gunacker, Patrik
name: Held, Karsten
Publisher: name: arXiv
Year: 2016
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: The mass-imbalanced Hubbard model represents a continuous evolution from the Hubbard to the Falicov-Kimball model. We employ dynamical mean field theory and study the paramagnetic metal-insulator transition, which has a very different nature for the two limiting models. Our results indicate that the metal-insulator transition rather resembles that of the Hubbard model as soon as a tiny hopping between the more localized fermions is switched on. At low temperatures we observe a first-order metal-insulator transition and a three peak structure. The width of the central peak is the same for the more and less mobile fermions when approaching the phase transition, which agrees with our expectation of a common Kondo temperature and phase transition for the two species.
description: 7 pages, 7 figures
Pismis 26, un ammasso nel cuore della Galassia
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2022

Questo scintillante raggruppamento di stelle è Pismis 26, un ammasso globulare a circa 23mila anni luce di distanza, localizzato nel bulge della Via Lattea. Gli astronomi hanno utilizzato il telescopio spaziale Hubble per determinare l'arrossamento, l'età e la metallicità dell'ammasso. Le stelle di Pismis 26 hanno un'elevata metallicità e l’età stimata dell’ammasso è risultata essere di 12 miliardi di anni
Mille supernove classificate con la A.I.
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2022

Gli astronomi del Caltech hanno utilizzato un algoritmo di apprendimento automatico per classificare mille supernove in modo completamente automatico. L'algoritmo è stato applicato ai dati acquisiti dalla Zwicky Transient Facility (Ztf), una survey astronomica del cielo che utilizza una fotocamera avanzata presso l'Osservatorio Palomar del Caltech
Come incastrare il secondo buco nero più vicino
Creators: Marco Malaspina
Publisher: name: Media Inaf
Year: 2022

Si stringe il cerchio attorno allo sfuggente buco nero supermassiccio che si pensa alberghi nel cuore di Leo I, una galassia nana a poco più di 800mila anni luce da noi: a tradirne la presenza potrebbero essere i venti emessi dalle giganti rosse che gli orbitano attorno, suggerisce uno studio su ApJL firmato da Fabio Pacucci e Avi Loeb del Center for Astrophysics di Harvard
Spiders of Tunisia (Araneae): Past, Present and Future
Creators: name: Kmira, Ghassen
name: Nasri-Ammar, Karima
name: Pétillon, Julien
name: Bosmans, Robert
Publisher: name: Zenodo
Year: 2024

description: Despite numerous recent and historical contributions, the arachnofauna of Tunisia remains severely understudied because of limited research efforts, taxonomic challenges, scattered literature, absence of local araneologists, and a lack of comprehensive reviews serving as a knowledge baseline. This has resulted in significant gaps in our understanding of spider diversity and distribution in the region.

This study aims to: 1) summarize the history of araneology in Tunisia, addressing current challenges and highlighting gaps in research; 2) present a comprehensive catalog of all Araneae species from Tunisia, analyzing taxonomic composition, number of records, and species distribution across the country; and 3) discuss the future perspectives of araneology in Tunisia, offering recommendations for future research and conservation efforts.

Keywords

Catalog ; biodiversity ; North Africa ; species distribution ; species list ; taxonomic review
Something more : hybridity and pluralism in the work of Tracey Moffatt.
Creators: name: Lowish, Susan Kathleen.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Immersi in un mare di galassie a “pescare meduse”
Creators: Ufficio stampa Inaf
Publisher: name: Media Inaf
Year: 2022

Il nuovo progetto di citizen science di Zooniverse promosso dall’Istituto nazionale di astrofisica è alla ricerca di utenti che vogliano scoprire le "galassie medusa", una classe particolare di galassie caratterizzate da lunghe code di materiale strappato dal plasma caldo dell’ammasso di galassie in cui cadono
Guardando il Sole dalla terrazza più alta di Roma
Creators: Ufficio stampa Inaf
Publisher: name: Media Inaf
Year: 2022

Il telescopio binoculare Solar Activity Mof Monitor (Samm) è posizionato sulla terrazza della villa di Monte Mario, sede dell’Istituto nazionale di astrofisica nella Capitale. Obiettivo: il monitoraggio continuativo dell’attività solare
Perseverance fotografa le rocce grigie di Yori Pass
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2022

Nell’immagine scattata da Perseverance allo Yori Pass si notano rocce grigie e spigolose, che sembrano estranee al luogo in cui si trovano. Tali "rocce galleggianti" potrebbero essere state trascinate dai ghiacciai o trasportate dal vento o dall’acqua. Ora si stanno facendo analisi per capire se procedere al campionamento, visto l’interesse in termini di potenzialità di conservazione di firme biologiche
Developments in western style contemporary music in South Korea, 1945-96
Creators: name: Bowie, Annette J. .
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Kann der Einsatz von CAS die Ausbildung am Seminar bereichern?
Creators: name: Höger, Christof
Publisher: name: Gesellschaft für Didaktik der Mathematik
Year: 2007
Subjects: subject: 510

description: Computer Algebra Systeme (CAS) sind aus der modernen Arbeit mit Mathematik nicht mehr wegzudenken. Sie erleichtern den Umgang mit komplexen mathematischen Sachverhalten, helfen bei der Modellbildung und sind mittlerweile so benutzerfreundlich geworden, dass auch ein Einsatz in der Schule sinnvoll sein kann. Zwangsläufig ergibt sich damit die Frage, wie man CAS in eine moderne Lehrerausbildung am Seminar integrieren kann.
Serve metodo per salvare il pianeta
Creators: Patrizia Caraveo
Publisher: name: Media Inaf
Year: 2022

I modelli scientifici basati sulla matematica e sulla fisica non combattono il cambiamento climatico ma permettono di capire meglio l’entità del problema e, forse, di convincere la politica ad agire. Ne scrive l’astrofisica Patrizia Caraveo in questo articolo pubblicato sul Sole24Ore, che vi riproponiamo con il consenso dell’autrice
Wonderland of the world : tourism development in Fiordland, New Zealand : thematic study and discussion on the usefulness of themes as a tool in heritage management
Creators: name: Egerton, Rachael Elizabeth.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Scoperta di studenti in viaggio studio al Tng
Creators: Rossella Spiga
Publisher: name: Media Inaf
Year: 2022

Un gruppo di studenti dell’Università di Firenze in viaggio studio al Telescopio nazionale Galileo dell’Inaf, alle Canarie, ha osservato un evento documentato raramente: l’evoluzione dell’attività del nucleo di una galassia a 300 milioni di anni luce dalla Terra. La scoperta è stata ora pubblicata su Astronomy & Astrophysics
Ecco la nuova generazione di astronauti dell’Esa
Creators: Redazione Media Inaf
Publisher: name: Media Inaf
Year: 2022

L’Europa ha scelto: cinque nuovi astronauti, undici riserve e il primo parastronauta. Diciassette in tutto, otto le donne, selezionati fra oltre 22mila candidati. Fra le riserve ci sono due italiani – Andrea Patassa, 31enne di Spoleto, e Anthea Comellini, 30enne di Chiari – e la ricercatrice del Cnr Meganne Christian, che oltre alle nazionalità britannica, australiana e neozelandese ha anche quella italiana
Monotonicity-preserving finite element schemes based on differentiable nonlinear stabilization
Creators: name: Badia, Santiago
name: Bonilla, Jesús
Publisher: name: arXiv
Year: 2016
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics

description: In this work, we propose a nonlinear stabilization technique for scalar conservation laws with implicit time stepping. The method relies on an artificial diffusion method, based on a graph-Laplacian operator. It is nonlinear, since it depends on a shock detector. The same shock detector is used to gradually lump the mass matrix. The resulting method is LED, positivity preserving, linearity preserving, and also satisfies a global DMP. Lipschitz continuity has also been proved. However, the resulting scheme is highly nonlinear, leading to very poor nonlinear convergence rates. We propose a smooth version of the scheme, which leads to twice differentiable nonlinear stabilization schemes. It allows one to straightforwardly use Newton's method and obtain quadratic convergence. In the numerical experiments, steady and transient linear transport, and transient Burgers' equation have been considered in 2D. Using the Newton method with a smooth version of the scheme we can reduce 10 to 20 times the number of iterations of Anderson acceleration with the original non-smooth scheme. In any case, these properties are only true for the converged solution, but not for iterates. In this sense, we have also proposed the concept of projected nonlinear solvers, where a projection step is performed at the end of every nonlinear iteration onto a FE space of admissible solutions. The space of admissible solutions is the one that satisfies the desired monotonic properties (maximum principle or positivity).
Low-lying charmed and charmed-strange baryon states
Creators: name: Chen, Bing
name: Wei, Ke-Wei
name: Liu, Xiang
name: Matsuki, Takayuki
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: In this work, we systematically study the mass spectra and strong decays of $1P$ and $2S$ charmed and charmed-strange baryons in the framework of nonrelativistic constituent quark models. With the light quark cluster-heavy quark picture, the masses are simply calculated by a potential model. The strong decays are studied by the Eichten-Hill-Quigg decay formula. Masses and decay properties of the well-established $1S$ and $1P$ states can be reproduced by our method. $Σ_c(2800)^{0,+,++}$ can be assigned as a $Σ_{c2}(3/2^-)$ or $Σ_{c2}(5/2^-)$ state. We prefer to interpret the signal $Σ_c(2850)^0$ as a $2S(1/2^+)$ state although at present we cannot thoroughly exclude the possibility that this is the same state as $Σ_c(2800)^0$. $Λ_c(2765)^+$ or $Σ_c(2765)^+$ could be explained as the $Λ_c^+(2S)$ state or $Σ^+_{c1}(1/2^-)$ state, respectively. We propose to measure the branching ratio of $\mathcal{B}(Σ_c(2455)π)/\mathcal{B}(Σ_c(2520)π)$ in future, which may disentangle the puzzle of this state. Our results support $Ξ_c(2980)^{0,+}$ as the first radial excited state of $Ξ_c(2470)^{0,+}$ with $J^P=1/2^+$. The assignment of $Ξ_c(2930)^0$ is analogous to $Σ_c(2800)^{0,+,++}$, \emph{i.e.}, a $Ξ^\prime_{c2}(3/2^-)$ or $Ξ^\prime_{c2}(5/2^-)$ state. In addition, we predict some typical ratios among partial decay widths, which are valuable for experimental search for these missing charmed and charmed-strange baryons.
description: 16 pages, 3 figures, 13 tables. Accepted by Eur. Phys. J. C
Search for Rare and Forbidden Charm Meson Decays D0 --> V[script l]+[script l] and hh[script ll]
Creators: name: Aitala, E. M.
name: Amato, S.
name: Anjos, J. C.
name: Appel, J. A.
name: Ashery, D.
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
Pnrr: il supercalcolo per le sfide del futuro
Creators: Ufficio Comunicazione Infn
Publisher: name: Media Inaf
Year: 2022

Si è appena concluso a Bologna il kick off meeting di Icsc, il nuovo Centro nazionale di Hpc, Big Data e Quantum Computing. La sua missione è realizzare in Italia un’infrastruttura digitale nazionale e sviluppare metodi e applicazioni al servizio della ricerca e delle imprese.
Solar Coronal Loops Associated with Small-scale Mixed Polarity Surface Magnetic Fields
Creators: name: Chitta, L. P.
name: Peter, H.
name: Solanki, S. K.
name: Barthol, P.
name: Gandorfer, A.
name: Gizon, L.
name: Hirzberger, J.
name: Riethmueller, T. L.
name: van Noort, M.
name: Rodriguez, J. Blanco
name: Iniesta, J. C. Del Toro
name: Suarez, D. Orozco
name: Schmidt, W.
name: Pillet, V. Martinez
name: Knoelker, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: How and where are coronal loops rooted in the solar lower atmosphere? The details of the magnetic environment and its evolution at the footpoints of coronal loops are crucial to understanding the processes of mass and energy supply to the solar corona. To address the above question, we use high-resolution line-of-sight magnetic field data from the Imaging Magnetograph eXperiment instrument on the SUNRISE balloon-borne observatory and coronal observations from the Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory of an emerging active region. We find that the coronal loops are often rooted at the locations with minor small-scale but persistent opposite-polarity magnetic elements very close to the larger dominant polarity. These opposite-polarity small-scale elements continually interact with the dominant polarity underlying the coronal loop through flux cancellation. At these locations we detect small inverse Y-shaped jets in chromospheric Ca II H images obtained from the SUNRISE Filter Imager during the flux cancellation. Our results indicate that magnetic flux cancellation and reconnection at the base of coronal loops due to mixed polarity fields might be a crucial feature for the supply of mass and energy into the corona.
description: Published in the Astrophysical Journal Supplement Series
Orion: dopo il sorvolo lunare, punta al record
Creators: Rossella Spiga
Publisher: name: Media Inaf
Year: 2022

La capsula spaziale Orion ha effettuato il sorvolo ravvicinato della Luna, a soli 130 chilometri dalla superficie, regalandoci immagini senza precedenti. Nel giro di pochi giorni Orion sarà il primo veicolo progettato per il volo umano a superare il record dell'Apollo 13 di distanza percorsa dalla Terra. Diario di viaggio della prima settimana di volo
Which way the wind blows? : the influence of non-musical factors in the reception of the music of Dmitri Shostakovich in the West
Creators: name: Gordon, Christopher.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Higher-spin charges in Hamiltonian form. I. Bose fields
Creators: name: Campoleoni, Andrea
name: Henneaux, Marc
name: Hörtner, Sergio
name: Leonard, Amaury
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study asymptotic charges for symmetric massless higher-spin fields on Anti de Sitter backgrounds of arbitrary dimension within the canonical formalism. We first analyse in detail the spin-3 example: we cast Fronsdal's action in Hamiltonian form, we derive the charges and we propose boundary conditions on the canonical variables that secure their finiteness. We then extend the computation of charges and the characterisation of boundary conditions to arbitrary spin.
description: 44 pages. References and comments added; version to appear in JHEP
Ministeriale Esa, dall’Italia oltre 3 miliardi di euro
Creators: Redazione Asi
Publisher: name: Media Inaf
Year: 2022

Tracciata la rotta per le future ambizioni europee, con attenzione alle eccellenze industriali italiane, e presentati i nuovi astronauti Esa: nell’elenco ci sono anche Anthea Comellini e Andrea Patassa, mentre per gli attuali astronauti della classe 2009 sarà garantito un volo sul Lunar Gateway tra il 2025 e il 2030
In the fields of difference : cyborgs and anthropology
Creators: name: Mullins, Stephen.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Iris Murdoch's message to the planet
Creators: name: Smart, Harris.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
The American Soldier in World War II: Attitudes of Negroes and Attitudes toward Negroes
Creators: name: Research Branch, Information
Publisher: name: Roper Center for Public Opinion Research
Year: 2020

description: Drafted/volunteered for military; branch of military serving in; military allowing respondent to show best personal performance; bus service to and from camp; stay in military after war; military camp respondent rather be in; best camp to be stationed at; state in which respondent spend last five years of civilian life; fairness of officers; rank in military; private want to be non-commissioned; want to be commissioned officer; interest in military occupation; company/battery cooperation; satisfaction with time in military; military experience worthwhile; pride in company/battery; ever feel worried/upset; make good in the military; satisfaction of army; length of war; combat vs. non-combat duty; overseas vs. US duty; soldier vs. working in a war job; another war in next 25 years; life better/worse from family/friends because of war; getting a job after war; war results; rights and privileges after war; reasons the US is in war; peace talks with Germany and Japan; most important questions to ask the president about the war; Black Americans not fighting in war; white people's attitudes towards Black people after the war; civilians/Black civilians/white soldiers/Black soldiers better/worse off after war; rights and privileges of Black people; treatment of Black soldiers in combat; media; Black soldiers; white soldiers; officers in charge of companies/batteries; police treatment of Black people; separate facilities for Black and white soldiers.
Celestial mechanics of elastic bodies II
Creators: name: Beig, Robert
name: Schmidt, Bernd G.
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct time independent configurations describing a small elastic body moving in a circular orbit in the Schwarzschild spacetime. These configurations are relativistic versions of Newtonian solutions constructed previously by us. In the process we simplify and sharpen previous results of ours concerning elastic bodies in rigid rotation.
description: 17 pages, second author has chosen to withdraw, small corrections, version identical to the published one
The reluctant Anglican? : Evelyn Underhill, Baron Friedrich von Hügel, and institutional religion
Creators: name: O'Connor, Mary.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Fluttuando nel Serpente, la nube cosmica di Hubble
Creators: Valentina Guglielmo
Publisher: name: Media Inaf
Year: 2022

L’immagine di una regione di formazione stellare, CB 130-3, immortalata dalla Wide Field Camera 3 di Hubble, è fondamentale per tracciare la densità della polvere cosmica che si addensa in corrispondenza della formazione di nuove stelle
Historic tobacco smoking pipes of Burma and Laos : questions on a regional anomaly
Creators: name: Hein, Don.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Shape and symmetry determine two-dimensional melting transitions of hard regular polygons
Creators: name: Anderson, Joshua A.
name: Antonaglia, James
name: Millan, Jaime A.
name: Engel, Michael
name: Glotzer, Sharon C.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The melting transition of two-dimensional (2D) systems is a fundamental problem in condensed matter and statistical physics that has advanced significantly through the application of computational resources and algorithms. 2D systems present the opportunity for novel phases and phase transition scenarios not observed in 3D systems, but these phases depend sensitively on the system and thus predicting how any given 2D system will behave remains a challenge. Here we report a comprehensive simulation study of the phase behavior near the melting transition of all hard regular polygons with $3\leq n\leq 14$ vertices using massively parallel Monte Carlo simulations of up to one million particles. By investigating this family of shapes, we show that the melting transition depends upon both particle shape and symmetry considerations, which together can predict which of three different melting scenarios will occur for a given $n$. We show that systems of polygons with as few as seven edges behave like hard disks; they melt continuously from a solid to a hexatic fluid and then undergo a first-order transition from the hexatic phase to the fluid phase. We show that this behavior, which holds for all $7\leq n\leq 14$, arises from weak entropic forces among the particles. Strong directional entropic forces align polygons with fewer than seven edges and impose local order in the fluid. These forces can enhance or suppress the discontinuous character of the transition depending on whether the local order in the fluid is compatible with the local order in the solid. As a result, systems of triangles, squares, and hexagons exhibit a KTHNY-type continuous transition between fluid and hexatic, tetratic, and hexatic phases, respectively, and a continuous transition from the appropriate "x"-atic to the solid. [abstract truncated due to arxiv length limitations].
Soja richtig anbauen
Creators: name: Unsleber, Jürgen
Publisher: name: Zenodo
Year: 2020
Subjects: legumes

description: In den letzten 10 Jahren stieg die Sojannbauflaeche in Deutschland von ca. 1.000 Hektar auf knapp 30.000 Hektar. Fehler im Anbau diese Kultur koennen im Gegnsatz zu anderen Kulturen waehrend der Vegetation durch Pflanzenschutz und Duengung kaul mehr ausgeglichen werden. Wertvolle Anbauhinweise gibe Juergen Unsleber, Pflanzenbauberater LKP/Erzeugerring Mittelfranken und Vorstandmitglied does Sojafoerderringes
The gender implications of dangdut kampungan : Indonesian 'low class' popular music
Creators: name: Browne, Susan J.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Turbulent dynamo in a conducting fluid and partially ionized gas
Creators: name: Xu, Siyao
name: Lazarian, A.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: By following the Kazantsev theory and taking into account both microscopic and turbulent diffusion of magnetic fields, we develop a unified treatment of the kinematic and nonlinear stages of turbulent dynamo, and study the dynamo process for a full range of magnetic Prandtl number Pm and ionization fractions. We find a striking similarity between the dependence of dynamo behavior on Pm in a conducting fluid and R (a function of ionization fraction) in partially ionized gas. In a weakly ionized medium, the kinematic stage is largely extended, including not only exponential growth but a new regime of dynamo characterized by linear-in-time growth of magnetic field strength, and the resulting magnetic energy is much higher than the kinetic energy carried by viscous-scale eddies. Unlike the kinematic stage, the subsequent nonlinear stage is unaffected by microscopic diffusion processes and has a universal linear-in-time growth of magnetic energy with the growth rate as a constant fraction $3/38$ of the turbulent energy transfer rate, showing good agreement with earlier numerical results. Applying the analysis to the first stars and galaxies, we find that the kinematic stage is able to generate a field strength only an order of magnitude smaller than the final saturation value. But the generation of large-scale magnetic fields can only be accounted for by the relatively inefficient nonlinear stage and requires longer time than the free-fall time. It suggests that magnetic fields may not have played a dynamically important role during the formation of the first stars.
description: 21 pages, 2 figures, accepted for publication in ApJ
Constraining rare B decays by $\mu^+\mu^-\to tc$ at future lepton colliders
Creators: name: Sun, Sichun
name: Yan, Qi-Shu
name: Zhao, Xiaoran
name: Zhao, Zhijie
Publisher: name: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Year: 2023
Subjects: B, decay
energy, high
muon, storage ring
energy, low
new physics
Monte Carlo
sensitivity
lepton
background
leptoquark
effective Hamiltonian
hadron

description: Motivated by the recent rare B decays measurements, we study the matching procedure of operators $O_9, O_{10}$ in the low energy effective Hamiltonian and operators in the Standard Model effective theory (SMEFT). It is noticed that there are more related operators in the SMEFT whose coefficients can not be determined only from the low-energy data from B physics. We demonstrate how to determine these coefficients with some new physics models, like $Z^\prime$ model and leptoquark models, and then consider how to probe these operators of SMEFT at high energy by using the process $\mu^+\mu^-\to tc$ at future muon colliders, which can provide complementary information except for $\mu^+ \mu^- \to b s$ on the underlying models which lead to rare B decay processes. We perform a Monte Carlo study (a hadron level analysis) to show how to separate the signal events from the SM background events and estimate the sensitivity to the Wilson coefficients for different models.
Così s’infiamma il blazar Markarian 501
Creators: Ufficio stampa Inaf
Publisher: name: Media Inaf
Year: 2022

Uno studio condotto sulle osservazioni di Ixpe da un team internazionale che comprende numerosi ricercatori italiani ha consentito di appurare che dietro l’accelerazione – a velocità prossime a quelle della luce – delle particelle di cui sono composti i poderosi getti emessi dai blazar, oggetti appartenenti alla famiglia dei nuclei galattici attivi tra i più luminosi del cielo, potrebbero celarsi potenti onde d’urto
The Effects of Instructional and Motivational Self-talk on Learning a Dart Throwing Skill in Children with Mild Mental Retardation.
Creators: name: Soleymani Tappesari, Bahare
name: Baniasadi, Tayebeh
name: Chaharbaghi, Zahra
name: Adib Chamachaei, Fatemeh
Publisher: name: figshare
Year: 2022
Subjects: subject: 170114 Sport and Exercise Psychology
subject: FOS: Psychology
subject: 110603 Motor Control
subject: FOS: Health sciences

description: Background: The aim of this study was to investigate the effects of instructional and motivational self-talk on learning a dart throwing skill in children with mild mental retardation. Method: The subjects included 45 children with mild mental retardation who were equally divided into three groups of instructional self-talk, motivational self-talk, and control. The motor task included darts throwing skill in which children’s darts throwing scores as well as self-efficacy were measured as dependent variables. The Participants performed pre-test (including 15 throws), acquisition phase (including five 5-minute practice blocks), and retention test (including 15 throws). The participants in the instructional self-talk group were asked to repeat the “Center-Target” phase before each attempt during the training phase and then throw the dart. Those in the motivational self-talk group were asked to use a motivational phrase “I Can" before the throw. The children in the control group followed a similar protocol but were not given any self-talk instructions. Results: The results showed that mentally retarded children who practiced instructional self-talk had better performance than those who used motivational self-talk and the control group in throwing darts in the retention test (P=0.000). Moreover, the motivational self-talk group performed better than the control group in dart throwing in the retention test (P=0.000). Finally, the results showed that children in the instructional and motivational self-talk groups reported higher self-efficacy scores than those in the control group in the retention test (P=0.000), while no significant difference was observed between the instructional and motivational self-talk groups. (P=0.527) Conclusion: The results of this study show that children with mild mental retardation are able to learn motor skills through self-talk.
Pianeti ricchi di elio affacciati alla valle dei raggi
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2022

Per tentare di spiegare il divario noto come “valle dei raggi”, alcuni astronomi hanno studiato il fenomeno della fuga atmosferica usando 70mila pianeti simulati a partire da modelli basati su dati osservativi e leggi della fisica, al fine di comprendere come il calore e le radiazioni ne influenzino le atmosfere, trovando che l’elio potrebbe costituire almeno il 40 per cento della massa delle atmosfere
Qubic, un telescopio per captare l’eco del Big Bang
Creators: Ufficio Comunicazione Infn
Publisher: name: Media Inaf
Year: 2022

Inaugurato oggi in Argentina uno strumento innovativo, basato sull’interferometria bolometrica, che osserverà il fondo cosmico a microonde da un sito desertico di alta quota sulle Ande argentine, vicino alla località San Antonio de Los Cobres. Il progetto vede l’Italia protagonista grazie ai contributi scientifici e tecnologici dell’Infn e delle università degli Studi di Milano, di Milano-Bicocca, di Roma “Tor Vergata” e Sapienza di Roma
Three colours blue and the virtual idea of liberty
Creators: name: Harding, Jacalene M.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Prima luce per le ottiche adattive di Eris
Creators: Ufficio stampa Inaf
Publisher: name: Media Inaf
Year: 2022

Con successo, lo spettrografo Eris del Vlt dell'Eso ha completato le sue prime osservazioni. Questo nuovo spettrografo servirà per osservare il Sistema solare, gli esopianeti e le galassie lontane con un dettaglio senza precedenti grazie anche al suo modulo per l’ottica adattiva completamente a firma italiana. L'Inaf (in particolare le sedi di Firenze, Teramo e Padova) è impegnato nella progettazione e nella realizzazione del modulo di ottica adattiva e calibrazione e nell’architettura generale del software di gestione di tutto lo strumento
Annusando con Webb il ricco bouquet di Wasp-39b
Creators: Marco Malaspina
Publisher: name: Media Inaf
Year: 2022

Sorprendente la varietà di sostanze nell’atmosfera del lontano esopianeta: oltre ad acqua e anidride carbonica, gli strumenti di Jwst hanno rilevato la presenza di monossido di carbonio, sodio, potassio e – per la prima volta in un’esoatmosfera – anidride solforosa, segno di reazioni fotochimiche in atto. Fra gli autori dei cinque studi che riportano la scoperta c’è anche Patricio E. Cubillos dell’Inaf di Torino
Measuring topological invariants from generalized edge states in polaritonic quasicrystals
Creators: name: Baboux, F.
name: Levy, E.
name: Lemaître, A.
name: Gomez, C.
name: Galopin, E.
name: Gratiet, L. Le
name: Sagnes, I.
name: Amo, A.
name: Bloch, J.
name: Akkermans, E.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We investigate the topological properties of Fibonacci quasicrystals using cavity polaritons. Composite structures made of the concatenation of two Fibonacci sequences allow investigating generalized edge states forming in the gaps of the fractal energy spectrum. We employ these generalized edge states to determine the topological invariants of the quasicrystal. When varying a structural degree of freedom (phason) of the Fibonacci sequence, the edge states spectrally traverse the gaps, while their spatial symmetry switches: the periodicity of this spectral and spatial evolution yields direct measurements of the gap topological numbers. The topological invariants that we determine coincide with those assigned by the gap-labeling theorem, illustrating the direct connection between the fractal and topological properties of Fibonacci quasicrystals.
description: 5 pages, 4 figures
Noether Symmetries of a Modified Model in Teleparallel Gravity and a New Approach for Exact Solutions
Creators: name: Tajahmad, Behzad
Publisher: name: arXiv
Year: 2016
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we have presented the Noether symmetries of flat FRW spacetime in the context of a new action in Teleparallel Gravity which we construct it based on $f(R)$ version. This modified action contains a coupling between scalar field potential and magnetism. Also, we introduce an innovative approach (B.N.S. Approach) for exact solutions which carry more conserved currents than Noether approach. By data analysis of the exact solutions, obtained from Noether approach, late time acceleration and phase crossing are realized, and some deep connections with observational data such as the age of the universe, the present amounts of the scale factor as well as the state and deceleration parameters are observed. In B.N.S. approach, we have considered dark energy dominated era.
Distribution of Dengue Virus Serotype Based on Neutralization Assay in Northwest Ethiopia
Creators: name: Ferede, Getachew
name: Tiruneh, Moges
name: Abate, Ebba
name: Wondimeneh, Yitayih
name: Tessema, Belay
name: Liebert, Uwe G
Publisher: name: Ethiopian Journal of Health and Biomedical Sciences
Year: 2023

description: Background: Dengue virus (DENV) is arthropod-borne virus transmitted by the bite of Aedes mosquitoes. Neighboring countries are highly endemic for DENV, but specific data on the occurrence of DENV in Ethiopia are not available. Therefore, this study aimed to provide information on the presence of different DENV serotypes in the study areas. Method: The study was conducted from January 2016 to March 2017 in northwest Ethiopia. Blood samples were collected from febrile patients and screened for IgM and IgG antibodies against DENV by ELISA. Further, IgM positive samples were screened for dengue NS1 antigen and RT-PCR targeting the NS5 gene of DENV while IgG positive samples were analyzed using neutralization test (ND50) to measure titers of dengue serotype-specific antibodies. Result: Out of 114 anti-dengue IgM positive samples, dengue NS1 antigen was positive in 17 (14.9%) while none of the samples were positive for RT-PCR. Neutralization test results were obtained from randomly selected 60 dengue IgG positive samples, and of which 49 (81.7%) had neutralized one or more DENV serotypes. Out of 49 neutralization test positive samples, 27 (55.1%) had neutralizing antibodies to DENV-1, 38 (77.6%) to DENV-2 and 18 (36.7%) to DENV-3. DENV-4 neutralizing antibodies were not detected. The most frequent monotypic neutralizing antibodies were against DENV-2. Conclusion: Dengue virus neutralizing antibodies present in most of the cases investigated. This indicates the presence of dengue infections as neglected cases of fever and thus highlight the importance of dengue surveillance, prevention, and control in the country
description: Ethiopian Journal of Health and Biomedical Sciences, Vol. 13 No. 1 (2023)
Observation of Toroidal Flow Antiparallel to the << i>Er × Btheta> Drift Direction in the Hot Electron Mode Plasmas in the Compact Helical System
Creators: name: Fujisawa, A.
name: Ida, K.
name: Minami, T.
name: Suzuki, C.
name: Yoshimura, Y.
Publisher: name: The American Physical Society
Year: 2001
Subjects: subject: 530

description: Physical Review Letters
Un’insolita misura della costante di struttura fine
Creators: Maura Sandri
Publisher: name: Media Inaf
Year: 2022

La costante di struttura fine è una delle costanti naturali più importanti nell’universo. Alla Tu Wien è stato trovato un modo straordinario per determinarla direttamente, attraverso la misura della rotazione del piano di polarizzazione di un raggio laser quando incide su un materiale particolare. Tutti i dettagli su Applied Physics Letters
Character and environment in Tim Winton's fiction
Creators: name: Boss, Peter J. .
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Vortex lines attached to dark solitons in Bose-Einstein condensates and Boson-Vortex Duality in 3+1 Dimensions
Creators: name: Mateo, A. Muñoz
name: Yu, Xiaoquan
name: Nian, Jun
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We demonstrate the existence of stationary states composed of vortex lines attached to planar dark solitons in scalar Bose-Einstein condensates. Dynamically stable states of this type are found at low values of the chemical potential in channeled condensates, where the long-wavelength instability of dark solitons is prevented. In oblate, harmonic traps, U-shaped vortex lines attached by both ends to a single planar soliton are shown to be long-lived states. Our results are reported for parameters typical of current experiments, and open up a way to explore the interplay of different topological structures. These configurations provide Dirichlet boundary conditions for vortex lines and thereby mimic open strings attached to D-branes in string theory. We show that these similarities can be formally established by mapping the Gross-Pitaevskii theory into a dual effective string theory for open strings via a boson-vortex duality in 3+1 dimensions. Combining a one-form gauge field living on the soliton plane which couples to the endpoints of vortex lines and a two-form gauge field which couples to vortex lines, we obtain a gauge-invariant dual action of open vortex lines with their endpoints attached to dark solitons.
description: 11 pages, 6 figures
Tracciata l’origine di 84 lampi gamma corti
Creators: Marco Malaspina
Publisher: name: Media Inaf
Year: 2022

Pubblicato su ApJ da un team guidato da due astrofisiche della Northwestern University, è il più grande catalogo di galassie ospiti di Grb corti mai realizzato. Molti di questi lampi gamma sono stati individuati al di fuori delle loro galassie ospiti, come se fossero stati “espulsi”: una scoperta sorprendente, che solleva interrogativi sui meccanismi che possono averli portati così lontano
Efficient inference for genetic association studies with multiple outcomes
Creators: name: Ruffieux, Hélène
name: Davison, Anthony C.
name: Hager, Jörg
name: Irincheeva, Irina
Publisher: name: arXiv
Year: 2016
Subjects: subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: Combined inference for heterogeneous high-dimensional data is critical in modern biology, where clinical and various kinds of molecular data may be available from a single study. Classical genetic association studies regress a single clinical outcome on many genetic variants one by one, but there is an increasing demand for joint analysis of many molecular outcomes and genetic variants in order to unravel functional interactions. Unfortunately, most existing approaches to joint modelling are either too simplistic to be powerful or are impracticable for computational reasons. Inspired by Richardson et al. (2010, Bayesian Statistics 9), we consider a sparse multivariate regression model that allows simultaneous selection of predictors and associated responses. As Markov chain Monte Carlo (MCMC) inference on such models can be prohibitively slow when the number of genetic variants exceeds a few thousand, we propose a variational inference approach which produces posterior information very close to that of MCMC inference, at a much reduced computational cost. Extensive numerical experiments show that our approach outperforms popular variable selection methods and tailored Bayesian procedures, dealing within hours with problems involving hundreds of thousands of genetic variants and tens to hundreds of clinical or molecular outcomes.
Piccolo asteroide colpisce il Canada
Creators: Albino Carbognani
Publisher: name: Media Inaf
Year: 2022

Il 19 novembre 2022 alle 08:27 Ut un piccolo asteroide di circa un metro di diametro è caduto in Canada pochissime ore dopo essere stato scoperto, dall’Arizona, con i telescopi della Catalina Sky Survey. Nessun rischio per la popolazione: l'asteroide si è disintegrato durante la caduta in atmosfera. Ma alcuni frammenti hanno probabilmente raggiunto il suolo e la caccia alla meteorite è già iniziata