cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On Simpson's rule and fractional Brownian motion with H = 1/10
Creators: name: Harnett, Daniel
name: Nualart, David
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60F05, 60H05, 60H07

description: We consider stochastic integration with respect to fractional Brownian motion (fBm) with $H < 1/2$. The integral is constructed as the limit, where it exists, of a sequence of Riemann sums. A theorem by Gradinaru, Nourdin, Russo & Vallois (2005) holds that a sequence of Simpson's rule Riemann sums converges in probability for a sufficiently smooth integrand $f$ and when the stochastic process is fBm with $H > 1/10$. For the case $H = 1/10$, we prove that the sequence of sums converges in distribution. Consequently, we have an Itô-like formula for the resulting stochastic integral. The convergence in distribution follows from a Malliavin calculus theorem that first appeared in Nourdin and Nualart (2010).
title: Storytelling in drei Schritten - wie man mit Geschichten lehrt und fasziniert
Creators: name: Ellrodt, Martin
Publisher: name: Zentrum für Hochschul- und Wissenschaftsdidaktik, Universität Regensburg
Year: 2022

description: Martin Ellrodt skizziert, wie man Schritt für Schritt Inhalte durch Storytelling in der Lehre vermitteln kann. Zudem erläutert er die Möglichkeiten, die sich dadurch ergeben.
Extended states in one-dimensional aperiodic lattices with linearly varying patches
Creators: name: Gong, Longyan
Publisher: name: arXiv
Year: 2023
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: We introduce a family of 1D aperiodic tight-binding models with linearly varying patches of A-type sites with on-site energies $ε_A=0$ connected by single B-type sites with $ε_B=W$. We analytically show such structures have strong spatial correlations. We theoretically find states are extended at resonance levels in the vicinity of $E^κ_M=-2\cos\frac{κπ}{M}$ if they are allowed energies, where $M=md$ are the size differences of patches, $d$ is the variation rate of patch sizes, $m\in \mathcal{N_{+}}$ and $κ=1,2,\cdots,M-1$. Related delocalization-localization transitions are explored. Numerical evidences are in excellent quantitative agreement with theoretical predictions.
description: 13 pages,19 figures, includes Supplemental Material
Radio Unnameable
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Fass plays a clip of John Drainie, and says that this episode is for reminiscences. He plays 'When I grow Up' by Harold Rome, a cover of 'Yellow Gal.' Fass talks about 'The Investigator' and how he would like for anyone with information to contact the radio.
Platforms and Publishers: The End of an Era
Creators: name: Rashidian, Nushin
name: Tsiveriotis, Georgios
name: Brown, Peter D.
name: Bell, Emily J.
name: Hartstone, Abigail
Publisher: name: Columbia University
Year: 2020
Subjects: Journalism
Online journalism
Journalism--Technological innovations
Press

description: Since our last report was published in June 2018, the shift in the journalism landscape has been seismic. Advertising revenues have continued to plummet and newsrooms across the country have experienced mass layoffs. In turn, publishers have scrambled to adapt their business models and priorities in an ever-changing and volatile media ecosystem—one still dominated by platforms despite the large-scale public reckoning with their effects on society and democracy. There is no telling how publishers will fare in the coming years as platforms undergo perhaps their most dramatic transformations since their foray into publishing products in 2015. However, one thing is certain: Despite facing increasing antitrust scrutiny and calls for regulation, platforms are more powerful than ever. Over time, they have come to control the online information ecosystem and, increasingly, in the case of Facebook and Google, are among the news industry’s top funders. It is in this context that many of the publishing executives and employees we interviewed described the “end of an era.” But as is clear in the report, this does not mean the end of their cooperation with platforms. It refers, rather, to the end of optimism that scale and ad-based platform products will bring about meaningful revenue and audience growth. From the rise of paywalls and reader revenue initiatives to the diversification of revenue streams through live events and podcasts, publishers are attempting to regain control over the future of their businesses.
Information Trapping by Topologically Protected Edge States: Scrambling and the Butterfly Velocity
Creators: name: Sedlmayr, Martyna
name: Cheraghi, Hadi
name: Sedlmayr, Nicholas
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Topological insulators and superconductors have attracted considerable attention, and many different theoretical tools have been used to gain insight into their properties. Here we investigate how perturbations can spread through exemplary one-dimensional topological insulators and superconductors using out-of-time ordered correlators. Out-of-time ordered correlators are often used to consider how information becomes scrambled during quantum dynamics. The wavefront of the out-of-time ordered correlator can be ballistic regardless of the underlying system dynamics, and here we confirm that for topological free fermion systems the wavefront spreads linearly at a characteristic butterfly velocity. We pay special attention to the topologically protected edge states, finding that "information" can become trapped in the edge states and essentially decoupled from the bulk, surviving for relatively long times. We consider different models with multiple possible edge states coexisting on a single edge.
Radio Unnameable
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019

description: Dramatized misdial that leads to a romantic date. Recording of 'Bombed Last Night', 'Cocaine Blues', 'Chelsea Boots'?, 'Shady Grove', 'Stately as a Galleon', 'Never Bite a Married Woman on the Thigh', 'Bubblegum Queen'?, 'Like a Rolling Stone'
Cubic interaction vertices in higher spin theories
Creators: name: Akshay, Y. S.
name: Ananth, Sudarshan
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Based purely on symmetry considerations, we derive the following result: in momentum space, the coefficient of the cubic interaction vertex for a spin $λ$ field is equal to the corresponding Yang-Mills (spin 1) coefficient, raised to the power $λ$. This result is valid for all $λ$ for Lagrangians that contain a cubic interaction vertex of the form $λ$-$λ$-$λ$, in four-dimensional flat spacetime. For $λ=3$, we present an additional derivation of this result.
description: 6 pages, published version
Notes on reductions of superstring theory to bosonic string theory
Creators: name: Ohmori, Kantaro
name: Tachikawa, Yuji
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is in general very subtle to integrate over the odd moduli of super Riemann surfaces in perturbative superstring computations. We study how these subtleties go away in favorable cases, including the embedding of N=0 string to N=1 string by Berkovits and Vafa, and the relation of the graviphoton amplitude and the topological string amplitude by Antoniadis, Gava, Narain and Taylor and Bershadsky, Cecotti, Ooguri and Vafa. The Poincaré dual of the moduli space of Riemann surfaces in the moduli space of super Riemann surfaces plays an important role.
description: 20 pages, v3: additional discussions using PCOs, published version
Die „Libri Carolini“ und die liturgische Kunst um 800. Zur 1200-Jahrfeier des 2. Konzils von Nikaia 787
Creators: name: Elbern, Victor H.
Publisher: name: Aachener Kunstblätter
Year: 2017

description: -
description: Aachener Kunstblätter, Bd. 54-55 (1986-1987): Aachener Kunstblätter
On the Diophantine equation N X^2 + 2^L 3^M = Y^N
Creators: name: Goedhart, Eva G.
name: Grundman, Helen G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11D41, 11D61

description: We prove that the Diophantine equation N X^2 + 2^L 3^M = Y^N has no solutions (N,X,Y,L,M) in positive integers with N > 1 and gcd(NX,Y) = 1, generalizing results of Luca, Wang and Wang, and Luca and Soydan. Our proofs use results of Bilu, Hanrot, and Voutier on defective Lehmer pairs.
description: "This is the author's version of a work that was accepted for publication in Journal of Number Theory. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication."
Media Mecca or News Desert? Covering local news in New York City
Creators: name: Rafsky, Sara G.
Publisher: name: Columbia University
Year: 2020
Subjects: Journalism
Mass media
Local mass media
News audiences

description: Recent research on the phenomenon of news deserts has largely focused on communities where the primary news outlets, often newspapers, have either closed or barely still exist. New York City, in contrast, has 90 online news publications, according to a study by News Revenue Hub, and at least 270 ethnic and community media organizations, per CUNYs Center for Community and Ethnic Media , in addition to (comparatively) still robust legacy broadcast and print media. As the national crisis for local news has gained more visibility in the past year, some of the more mainstream NYC outlets have renewed their focus on local coverage. The New York Times spotlighted its metro desk in advertising campaigns, and WNYC acquired and relaunched the shuttered Gothamist site. The City, an online nonprofit news outlet, also launched in the spring of 2019 with 10 million dollars in funding from the Leon Levy Foundation, Craig Newmark Philanthropies, and the Charles H. Revson Foundation, among other individual contributors. Addressing what it classified as a “life-or-death moment for local news in New York City,” the organization focused on filling the increasing void in citywide beat coverage. But none of these efforts have resolved a key issue—that hyperlocal and community-level local outlets in New York City are still struggling, and that, subsequently, residents are being deprived of critical information. Taking this complexity into account, this study seeks to understand the New York City media ecosystem—print, digital, broadcast, mainstream, community, and ethnic—by examining how news organizations prioritize beats and where they see gaps in coverage, rather than counting or mapping publications. To do this, we interviewed journalism professionals at a wide range of news organizations in New York City about how they allocate resources when choosing editorial priorities, the challenges they face, where they see the gaps in coverage, and what they wish they could be doing better. These interviews also touched on questions related to the relationships between news outlets and their audiences, as well as with one another.
title: Πρότυπο πάρκων εναλλακτικών μορφών τουρισμού και κοινωνικής συνέργειας στα Καμένα Βούρλα
title: A model park for alternative forms of tourism and social synergy in Kamena Vourla
Creators: name: Κατσιουλη Βασιλικη
name: Γεωργακοπουλος Δημοσθενης
Publisher: name: Technical University of Crete
Year: 2019

description: Η παρούσα διπλωματική εργασία μελετά την περιοχή που βρίσκεται δυτικά της απόληξης του σχεδίου πόλης  των Καμμένων Βούρλων. Πρόκειται για ένα τοπίο στο οποίο ως βασικά στοιχεία διακρίνονται: η οριοθέτηση του από τον Μαλιακό κόλπο και το όρος Κνημίς, οι ιαματικές πηγές, η Natura των εκβολών του Σπερχειού και η Ε.Ο. Αθηνών- Θεσσαλονίκης.
Η πρόταση αφορά στον επανασχεδιασμό της περιοχής ως πρότυπο πάρκο εναλλακτικών μορφών τουρισμού, περιβαλλοντικής εκπαίδευσης και κοινωνικής συνέργειας. Στόχος είναι να δημιουργηθούν νέες δομές σε επίπεδο δικτύων και χρήσεων, οι οποίες ορίζουν ένα νέο παραγωγικό μοντέλο, επαναπροσδιορίζοντας το χαρακτήρα της περιοχής αλλά και ευρύτερα την παραθεριστική ταυτότητα των Καμμένων Βούρλων.
Βασικός στόχος είναι η συνύπαρξη δραστηριοτήτων από όλους τους τομείς παραγωγής μέσα από λειτουργίες αγροτικές, βιοτεχνικές, τουριστικές, θεραπευτικές, πολιτιστικές, εκπαιδευτικές και αναψυχής. Η συνθετική πρόταση αφορά στη δημιουργία ενός δικτύου πορειών παράλληλα στην κίνηση του νερού και ενός δικτύου μονοπατιών περιπλάνησης στις διαφορετικές ποιότητες του τοπίου, τα οποία ενοποιούν τις ποικίλες χρήσεις και δημιουργούν ένα αλληλοτροφοδοτούμενο σύστημα.
Der Typus des „Apostelbalkens“ und seine Verbreitung in der rhein-maasländischen Schnitzkunst des 15. und 16. Jahrhunderts
Creators: name: Oellers, Adam C.
Publisher: name: Aachener Kunstblätter
Year: 2017

description: -
description: Aachener Kunstblätter, Bd. 54-55 (1986-1987): Aachener Kunstblätter
title: Ιστορικό Λιμάνι Ηρακλείου. Ανάπλαση του ευρύτερου δημόσιου χώρου με σκοπό την ανάδειξη της ιστορικής διαδρομής του μνημειακού συνόλου σε σύγχρονη ενιαία απόδοση
title: Historical Port of Heraklion. Redevelopment of the wider public space aiming at highlighting the historical course of the monumental ensemble within a coherent contemporary framework
Creators: name: Κουνδουρακη Ελενη
Publisher: name: Technical University of Crete
Year: 2019

description: Η παρούσα μελέτη κρίνοντας την σύγχρονη τοπική φυσιογνωμία του ιστορικού λιμένα του Ηρακλείου ανίκανη να επιτρέψει στα υφιστάμενα μνημεία να επικοινωνήσουν την ιστορική και πολιτισμική ταυτότητα του τόπου, αποσκοπεί στην αποκατάσταση της εικόνας του ιστορικού λιμένα ως ενιαίο ιστορικό σύνολο όπως και στην αποκατάσταση της κατεξοχήν ιστορικά σημαντικής σχέσης του  δομημένου περιβάλλοντος με τη θάλασσα.
    Ο σχεδιαστικός άξονας στηρίζεται στην ανάδυση του πολυφωνικού παρελθόντος του λιμένα και όχι στην μονομερή προσέγγιση της ιστορίας. Εργαλείο στο παραπάνω εγχείρημα αποτελεί η ανάλυση και η μετεγγραφή της μεταβολής ιστορικών φυσιογνωμιών του λιμένα, σε αφηγηματικές δομές και πορείες που θα αποτελούν προεκτάσεις της ιστορίας του τόπου και θα εξυπηρετούν τις σύγχρονες ανάγκες του . Η γεωμετρία της μελέτης επεμβαίνει στη σύγχρονη ακτογραμμή, μετεγγράφοντας την πάνω στις χαράξεις των μεταβαλλόμενων ορίων της στο παρελθόν, με στόχο την δημιουργία δημόσιου χώρου φορέα συλλογικής μνήμης, προσβάσιμο στον κάτοικο και επισκέπτη  μέσω ενός συνόλου  διαδρομών οι οποίες  θα αντανακλούν το παλίμψηστο της ιστορίας του λιμένα και θα αποτελούν το συμπληρωματικό ιστορικό ίχνος που θα πλαισιώνει τα υφιστάμενα μνημεία ως ‘σκελετός που συνδέει την πόλη στην ιστορία’ .
On the galactic spin of barred disk galaxies
Creators: name: Cervantes-Sodi, Bernardo
name: Li, Cheng
name: Park, Changbom
name: Wang, Lixin
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a study of the connection between the galactic spin parameter $λ_{d}$ and the bar fraction in a volume-limited sample of 10,674 disk galaxies drawn from the Sloan Digital Sky Survey Data Release 7. The galaxies in our sample are visually classified into galaxies hosting long or short bars, and non-barred galaxies. We find that the spin distributions of these three classes are statistically different, with galaxies hosting long bars with the lowest $λ_{d}$ values, followed by non-barred galaxies, while galaxies with short bars present typically high spin parameters. The bar fraction presents its maximum at low to intermediate $λ_{d}$ values for the case of long bars, while the maximum for short bars is at high $λ_{d}$. This bi-modality is in good agreement with previous studies finding longer bars hosted by luminous, massive, red galaxies with low content of cold gas, while short bars are found in low luminosity, low mass, blue galaxies, usually gas rich. In addition, the rise and fall of the bar fraction as a function of $λ_{d}$, within the long-bar sample, shown in our results, can be explained as a result of two competing factors: the self-gravity of the disk that enhances bar instabilities, and the support by random motions instead of ordered rotational motion, that prevents the formation/growth of bars.
description: 10 pages, 6 figures,1 table. Accepted for publication in ApJ
Andreev and normal reflections in gapped bilayer graphene-superconductor junctions
Creators: name: Ram, Panch
name: Beckmann, Detlef
name: Danneau, Romain
name: Belzig, Wolfgang
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the Andreev and normal reflection processes -- retro as well as specular -- in a bilayer graphene-superconductor junction where equal and opposite displacement fields are applied for the top and bottom layers to induce a band gap. By employing the Dirac-Bogoliubov-de Gennes equation for the gapped bilayer graphene-superconductor junction, we calculate the reflections probabilities within the scattering theory approach. The subgap conductance, calculated in the framework of Blonder-Tinkham-Klapwijk formalism, shows the contribution from the Andreev retro-reflection (specular-reflection) when the applied bias voltage is below (above) the Fermi energy. Notably, both retro and specular reflections are modified in the presence of the displacement field, and the retro-to-specular crossover gets amplified when the displacement field is relatively small. They can be further tuned to either specular or retro Andreev reflection by adjusting the Fermi energy. Furthermore, our study reveals the simultaneous existence of double Andreev reflections and double normal reflections when the displacement field becomes comparable to the interlayer coupling strength. The existence of the normal retro-reflection process in a bilayer graphene-superconductor junction is a new finding which shows a distinctive feature in the conductance that can be experimentally verified.
description: 12 pages, 11 figures
Guide to Open Source Intelligence (OSINT)
Creators: name: Hayden, Michael Edison
Publisher: name: Columbia University
Year: 2019
Subjects: Journalism
Online journalism
Open source intelligence
Internet searching
Online social networks

description: Open source intelligence, which researchers and security services style OSINT, is one of the most valuable tools to a contemporary reporter, because of the vast amount of publicly available online information. Reporters conducting OSINT-based research should aspire to use the information they gather online to peer behind the superficial mask of the internet—the anonymous avatars on Twitter, for example, or the filtered photographs on Instagram—and tell the story of the real, flesh-and-blood human beings on the other side of our screens. Every time we go online, we give up part of our identity. Sometimes, it comes in the form of an email used to make a Twitter account. Other times, it’s a phone number for two-factor authentication, or days’ and weeks’ worth of timestamps suggesting when a user is awake and asleep. Journalists can piece together clues like this and use them to tell stories which are of interest to the public. The following guide is written to provide a basic foundation not only for doing that work, but also for verifying the information, archiving findings, and interacting with hostile communities online. The closer we get to understanding the people who make the influential and newsworthy aspects of the internet happen—and their motivations—the easier our work of discovery becomes.
Protocolo de resposta rápida sobre o combate das Fake News do momento pandêmico sobre a educação em saúde para a população.
Creators: name: Kirsch, Gustavo Hanich
name: Da Conceição De Oliveira, Maria Grasiela
name: De Oliveira, Silvia Furtado
Publisher: name: Zenodo
Year: 2022
Subjects: Desinformação; Educação em saúde; Covid-19

description: Protocolo com o objetivo de identificar efetividade do combate a fake News de covid-19 relacionados a educação em saúde a população. Metodologia: será realizada uma revisão rápida seguindo as recomendações do Cochrane Rapid Reviews Methods Group. A busca dos estudos será realizada nas seguintes bases de dados eletrônicas: BDENF, LILACS e PAHO-IRIS. As etapas de triagem pelo descritores e resumo e a leitura do texto integral dos estudos, serão realizadas por três revisores. No caso de divergências na seleção dos estudos, estas serão resolvidas pelo quarto revisor. Resultados esperados: espera-se encontrar evidências com resultados que mostrem a efetividade do combate a fake News frente a educação em saúde.
title: Πάρκο "Κάρβουνο": Επέκταση υφιστάμενου πάρκου-νέοι συσχετισμοί με το δημόσιο χώρο στο Περιστέρι
title: "Coal" Park: Expansion of existing park-new correlations with the public space on Peristeri, Athens
Creators: name: Σορα Ελευθερια
name: Παλιουρας Νικολαος
Publisher: name: Technical University of Crete
Year: 2019

description: Η περιοχή μελέτης βρίσκεται στον δήμο Περιστερίου και αποτελεί τον μεγαλύτερο αστικό αδόμητο χώρο εντός των ορίων του. Οριοθετείται από την οδό Αναπαύσεως στον βορρά, το νεκροταφείο Περιστερίου στα δυτικά, το νότιο τμήμα της συνδέεται με το άλσος, ενώ στα ανατολικά ορίζεται από την οδό Δωδεκανήσου. Η σημερινή κατάσταση της περιοχής μελέτης αποτελεί ένα συνονθύλευμα ετερόκλητων χρήσεων και κατάλοιπων του παρελθόντος. Πιο συγκεκριμένα στην περιοχή σήμερα λειτουργεί το εκθεσιακό κέντρο Περιστερίου,  δύο υποτυπώδη γήπεδα ποδοσφαίρου και ένα αντισφαίρισης, ο χώρος στάθμευσης των απορριμματοφόρων του δήμου, μάντρες οικοδομικών υλικών καθώς και ίχνη των προκατασκευασμένων κατοικιών των σεισμόπληκτων του 1999.  Από το 1933 μέχρι το 1956 ο τόπος σημαδεύτηκε από την εκμετάλλευση του ως λιγνιτωρυχείο, η λειτουργία του οποίου τερματίστηκε βίαια λόγω της απειλής που έθετε στην υγεία των κατοίκων. Η περίοδός εκείνη και το αντίκτυπο της στο χώρο, προτιμήθηκε να λησμονηθεί και κάθε αποτύπωμά της καλύφθηκε ή καταστράφηκε.
 Στόχος της πρότασης είναι η κάλυψη των αναγκών σε πράσινο, αθλητικές και πολιτιστικές χρήσεις και η δημιουργία νέων αστικών συσχετισμών επαναφέροντας παράλληλα τη μνήμη του λιγνιτωρυχείου, όχι ως μιας ανάμνησης που είναι ανοίκεια για τους κατοίκους, αλλά ως δυναμικό στοιχείο του αστικού τοπίου. Για την επίτευξη των στόχων αυτών προτείνεται:
 -επέκταση του άλσους Περιστερίου προς τον βορρά με ενεργοποίηση των υφιστάμενων εισόδων και δημιουργία νέων
-δημιουργία μιας υπερυψωμένης πορείας, με αναφορά στο λιγνιτωρυχείο, που αποτελεί το σημείο αναφοράς της πρότασης καθώς και στοιχείο σύνδεσης του πάρκου με τη πόλη
-αντικατάσταση του εκθεσιακού κέντρου και δημιουργία δημοσίου αστικού χώρου (πλατεία) στη θέση του, η οποία επικουρείται από την κατασκευή κέντρου νεότητας και βιβλιοθήκης του δήμου
-σύνδεση με τον κεντρικό πεζόδρομο Περιστερίου
-δημιουργία ζώνης αθλητικών εγκαταστάσεων σε σύνδεση με το γήπεδο του Ηφαίστου
Reduced Order Modelling for Slope Stability of Rehabilitated Coal Slopes
Creators: name: HU, ROGER
Publisher: name: Monash University
Year: 2022
Subjects: Geomechanics and resources geotechnical engineering
Mining engineering

description: The AGL Loy Yang Brown-Coal Mine is undergoing progressive rehabilitation and plans on converting the mine into a pit lake. Converting the mine into a pit lake may take several decades, there are many scenarios that may occur in this period that pose a risk to the slope stability. A model that can predict the slope behaviour under different conditions is needed to accurately determine the long-term slope behaviour. Capturing the possible long-term behaviour requires intensive computational power. A strategy to develop a Reduced Order Model (ROM) is presented to capture the likely slope behaviour with less computational power.
On Gaussian Beams Described by Jacobi's Equation
Creators: name: Smith, Steven Thomas
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: Differential Geometry (math.DG)
subject: Metric Geometry (math.MG)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Gaussian beams describe the amplitude and phase of rays and are widely used to model acoustic propagation. This paper describes four new results in the theory of Gaussian beams. (1) A new version of the Červený equations for the amplitude and phase of Gaussian beams is developed by applying the equivalence of Hamilton-Jacobi theory with Jacobi's equation that connects Riemannian curvature to geodesic flow. Thus the paper makes a fundamental connection between Gaussian beams and an acoustic channel's so-called intrinsic Gaussian curvature from differential geometry. (2) A new formula $π(c/c")^{1/2}$ for the distance between convergence zones is derived and applied to several well-known profiles. (3) A class of "model spaces" are introduced that connect the acoustics of ducting/divergence zones with the channel's Gaussian curvature $K=cc"-(c')^2$. The "model" SSPs yield constant Gaussian curvature in which the geometry of ducts corresponds to great circles on a sphere and convergence zones correspond to antipodes. The distance between caustics $π(c/c")^{1/2}$ is equated with an ideal hyperbolic cosine SSP duct. (4) An "intrinsic" version of Červený's formulae for the amplitude and phase of Gaussian beams is derived that does not depend on an "extrinsic" arbitrary choice of coordinates such as range and depth. Direct comparisons are made between the computational frameworks used by the three different approaches to Gaussian beams: Snell's law, the extrinsic Frenet-Serret formulae, and the intrinsic Jacobi methods presented here. The relationship of Gaussian beams to Riemannian curvature is explained with an overview of the modern covariant geometric methods that provide a general framework for application to other special cases.
description: Submitted to SIAM J. Appl. Math. (SIAP)
Effects of Methylmercury and Theaflavin Digallate on Adipokines in Mature 3T3-L1 Adipocytes: A Recent Study
Creators: name: Shubhangi Chauhan
name: Kriya Dunlap
name: Duffy, Lawrence K.
Publisher: name: Zenodo
Year: 2021
Subjects: Methylmercury
diabetes
adipokines
adiponectin
resistin
lipid peroxidation
theaflavin digallate

description: Diabetes is a contributor to morbidity across the globe and is often associated with obesity, metabolic syndrome and other inflammatory diseases associated with aging. In addition to genetic and lifestyle factors, environmental factors such as metals and persistent organic pollutants may increase the severity or lower the threshold of these conditions. In cell culture, methylmercury is toxic to adipocytes and may impact adipokine secretions. In this study, we determined the effects of different concentrations of theaflavin digallate on methylmercury exposed 3T3-L1 adipocytes in cell culture. Secretions of resistin, adiponectin and lipid peroxidation product, 4-hydroxynonenal (4-HNE) were monitored using ELISA assays. Cell morphology of methylmercury and theaflavin-3,3′-digallate treated adipocytes was assessed using Lipid (Oil Red O) staining. Exposure to methylmercury increased the levels of resistin and adiponectin as well as 4-HNE when compared to the control cells. Methylmercury treated cells resulted in smaller number of adipocytes and clumped lipid droplets. These results suggest that methylmercury induces reactive oxygen species leading to development of an inflammatory response. Theaflavin-3,3′-digallate reduced the impact of methylmercury by maintaining the adipocytes morphology and secretion patterns of adiponectin, resistin and 4-hydroxynonenal. With this experimental model system other anti-inflammatory and signaling agents could be tested at the biochemical level before eventually leading to studies in animal models. Different TF-3 concentrations can be used to have a clearer understanding of the anti-oxidative effects of polyphenolic compounds.
Conservative Newswork: A Report on the Values and Practices of Online Journalists on the Right
Creators: name: Nadler, Anthony
name: Bauer, A. J.
name: Konieczna, Magda
Publisher: name: Columbia University
Year: 2020

description: Renewed popularity and commercial viability of openly partisan media in the United States can be traced back to the rise of conservative talk radio in the late 1980s, but the expansion of partisan news outlets has accelerated most rapidly online. This expansion has coincided with debates within many digital newsrooms. Should the ideals journalists adopted in the 20th century be preserved in a digital news landscape? Or must today’s news workers forge new relationships with their publics and find alternatives to traditional notions of journalistic objectivity, fairness, and balance? Despite the centrality of these questions to digital newsrooms, little research on “innovation in journalism” or the “future of news” has explicitly addressed how digital journalists and editors in partisan news organizations are rethinking norms. In particular, researchers have almost entirely ignored news workers in conservative-leaning outlets. We interviewed 22 journalists and editors at 14 online conservative news organizations about what guides their news judgments, how they engage audiences, and how they think conservative news outlets should operate. Our findings, since they are largely based on this interview data, offer insights into the aspirational ideals of our participants and their newsrooms.
Stratospheric dayside-to-nightside circulation drives the 3-D ozone distribution on synchronously rotating rocky exoplanets
Creators: name: Braam, Marrick
name: Palmer, Paul I.
name: Decin, Leen
name: Cohen, Maureen
name: Mayne, Nathan J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Determining the habitability and interpreting future atmospheric observations of exoplanets requires understanding the atmospheric dynamics and chemistry from a 3-D perspective. Previous studies have shown significant spatial variability in the ozone layer of synchronously rotating M-dwarf planets, assuming an Earth-like initial atmospheric composition. We use a 3-D Coupled Climate-Chemistry model to understand this distribution of ozone and identify the mechanism responsible for it. We document a previously unreported connection between the ozone production regions on the photochemically active dayside hemisphere and the nightside devoid of stellar radiation and thus photochemistry. We find that stratospheric dayside-to-nightside overturning circulation can advect ozone-rich air to the nightside. On the nightside, ozone-rich air subsides at the locations of two quasi-stationary Rossby gyres, resulting in an exchange between the stratosphere and troposphere and the accumulation of ozone at the gyre locations. We identify the hemispheric contrast in radiative heating and cooling as the main driver of this ozone circulation. Dynamically-driven chemistry also impacts other tracer species in the atmosphere (gaseous and non-gaseous phase) as long as chemical lifetimes exceed dynamical lifetimes. These findings illustrate the 3-D nature of planetary atmospheres, predicting spatial and temporal variability that will impact spectroscopic observations of exoplanet atmospheres.
description: 13 pages, 12 figures, submitted to MNRAS
Coulomb blockade in a non-thermalized quantum dot
Creators: name: McArdle, George
name: Davies, Rose
name: Lerner, Igor V.
name: Yurkevich, Igor V.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate non-equilibrium transport properties of a quantum dot in the Coulomb blockade regime under the condition of negligible inelastic scattering during the dwelling time of the electrons in the dot. Using the quantum kinetic equation we show that the absence of thermalization leads to a double-step in the distribution function of electrons on the dot, provided that it is symmetrically coupled to the leads. This drastically changes nonlinear transport through the dot resulting in an additional (compared to the thermalized case) jump in the conductance at voltages close to the charging energy, which could serve as an experimental manifestation of the absence of thermalization.
description: 5 pages, 3 figures, and Supplemental material (4 pages); final version, as published (figures updated and revised discussion and supplemental material)
Why twisting angles are diverse in graphene Moire patterns?
Creators: name: Jiang, Jin-Wu
name: Wang, Bing-Shen
name: Rabczuk, Timon
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The interlayer energy of the twisting bilayer graphene is investigated by the molecular mechanics method using both the registry-dependent potential and the Lennard-Jones potential. Both potentials show that the interlayer energy is independent of the twisting angle $θ$, except in the two boundary regions $θ\approx 0$ or $60^{\circ}$, where the interlayer energy is proportional to the square of the twisting arc length. The calculation results are successfully interpreted by a single atom model. An important information from our findings is that, from the energy point of view, there is no preference for the twisting angle in the experimental bilayer graphene samples, which actually explains the diverse twisting angles in the experiment.
description: 8 pages, 12 figures
R2M rapid risk assessment to support integrated biosecurity responses from farm to global scales
Creators: name: Buddenhagen, Chris
name: Mason, Norman
name: Choudhary, Manoj
name: Etherton, Berea
name: Kraisitudomsook, Nattapol
name: McCoy, Richard
name: Mouafo Tchinda, Romeric
name: Perez, Chris
name: Plex Sula, Aaron Isai
name: Garrett, Karen A.
Publisher: name: AgResearch
Year: 2023
Subjects: Biosecurity science and invasive species ecology

description: The ability of national agricultural research and extension systems (NARES) and national plant protection organizations (NPPOs) to address emerging pathogen and pest risks is key to national food security. Many countries globally are in the process of improving these systems. R2M is a set of tools for rapid risk (R2) assessment and mitigation (M) planning for crop pathogens, pests and weeds at the national or regional level. These tools can help countries develop their strategies for effective management of current crop disease problems, as well as new invasive pathogens and pests. R2M tools act as building blocks in the development of a global surveillance and mitigation system for crop disease. The R2M ‘meta-tool’ for expert knowledge elicitation provides an automated method for leaders in national programs to create their own tools for evaluating risk and mitigation strategies. R2M also includes geographic risk analysis such as cropland connectivity analysis, and management scenario analysis such as impact network analysis. We provide examples of R2M applications in several countries and introduce the latest R2M options available for new applications. It is hoped that the R2M framework will provide the basis for a global community of practice trying to solve similar problems. We discuss examples involving the following: (1) Expert elicitation. (2) Crop connectivity. (3) Regional assessments of invasive species management scenarios.
Codebooks for analyzing Twitter and Facebook accounts sharing emerging COVID-19 science
Creators: name: Fleerackers, Alice
name: Riedlinger, Michelle
Publisher: name: Zenodo
Year: 2022
Subjects: content analysis
social media
Twitter
Facebook
Actor Groups
coding
method

description: These codebooks were developed as part of a study titled "Academic explanatory journalism and emerging COVID-19 science: How social media accounts amplify The Conversation’s preprint coverage" (published in Media International Australia with co-authors Axel Bruns and Jean Burgess). They can be used to analyze the nature of publicly available Twitter and Facebook accounts in terms of the type of account (e.g., individual, group, etc) and the type of actor group (e.g., academia, healthcare, political actor, etc).
Ueber Ort und Zeit von Chlodwigs Alamannensieg
Creators: name: Ruppersberg, Albert
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 101 (1897): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Early Growing Supermassive Black Holes Strengthen Bars and Boxy/Peanut Bulges
Creators: name: Wheeler, Vance
name: Valluri, Monica
name: Silva, Leandro Beraldo e
name: Dattathri, Shashank
name: Debattista, Victor P.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Using N-body simulations we explore the effects of growing a supermassive black hole (SMBH) prior to or during the formation of a stellar bar. Keeping the final mass and growth rate of the SMBH fixed, we show that if it is introduced before or while the bar is still growing, the SMBH does not cause a decrease in bar amplitude. Rather, in most cases, it is strengthened. In addition early growing SMBHs always either decreases the buckling amplitude, delay buckling, or both. This weakening of buckling is caused by an increase in the disk vertical velocity dispersion at radii well beyond the nominal black hole sphere-of-influence. While we find considerable stochasticity and sensitivity to initial conditions, the only case where the SMBH causes a decrease in bar amplitude is when it is introduced after the bar has attained a steady state. In this case we confirm previous findings that the decrease in bar strength is a result of scattering of bar-supporting orbits with small pericenter radii. By heating the inner disk both radially and vertically, an early growing SMBH increases the fraction of stars that can be captured by the Inner Lindblad Resonance (ILR) and the vertical ILR, thereby strengthening both the bar and the boxy peanut shaped bulge. Using orbital frequency analysis of star particles, we show that when an SMBH is introduced early and the bar forms around it, the bar is populated by different families of regular bar-supporting orbits than when the bar forms without an SMBH.
description: 26 pages, 15 figures. Updated figures and some arguments in Sec. 5.3,5.4, Results Unchanged. Updates reflect format and style of final published version
Die kölnischen Stadtpläne des Arnold Mercator und des Cornelius ab Egmont von 1571 und 1642
Creators: name: Schultze, Rudolf
Publisher: name: Bonner Jahrbücher
Year: 2017

description: Rezension zu: Die kölnischen Stadtpläne des Arnold Mercator und des Cornelius ab Egmont von 1571 und 1642
description: Bonner Jahrbücher, Bd. 102 (1898): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
title: SPARQL rewriting for query mediation over mapped ontologies
Creators: name: Μακρης Κωνσταντινος
Publisher: name: Technical University of Crete
Year: 2010

description: In the recent years establishing interoperability and supporting data integration has become a major research challenge for the web of data. Uniform information access of heterogeneous sources is of major importance for Semantic Web applications and end users. We describe a methodology for SPARQL query mediation over federated OWL/RDF knowledge bases. The query mediation exploits mappings between semantically related entities of the mediator ontology (global ontology) and the federated site ontologies (local ontologies). A very rich set of mapping types, based on Description Logic semantics, is supported. The SPARQL queries which are posed over the global ontology are decomposed, rewritten, and then submitted to the federated sources. The rewritten SPARQL
queries are locally evaluated and the results are returned to the mediator. We describe the formal modeling of executable mappings (i.e. mappings that can be used in SPARQL query rewriting), as well as the theoretic and implementation aspects of SPARQL query rewriting. Finally, we describe the implementation of a system supporting the mediation process.
A Guide to Native Advertising
Creators: name: SIrrah, Ava
Publisher: name: Columbia University
Year: 2019
Subjects: Journalism
Online journalism
Advertising
Internet marketing

description: Native advertising is the central digital-revenue stream for the publishing industry. It makes up some 60 percent of the market, or $32.9 billion, according to a 2018 forecast by market research firm eMarketer. Understanding why the trend has been enthusiastically embraced by numerous news organizations requires a fuller appreciation of the changes that shape our information environment.
Correlated electronic structure of La$_3$Ni$_2$O$_7$ under pressure
Creators: name: Christiansson, Viktor
name: Petocchi, Francesco
name: Werner, Philipp
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Recently, superconductivity with a $T_c$ up to 78 K has been reported in bulk samples of the bilayer nickelate La$_3$Ni$_2$O$_7$ at pressures above 14 GPa. Important theoretical tasks are the formulation of relevant low-energy models and the clarification of the normal state properties. Here, we study the correlated electronic structure of the high-pressure phase in a four-orbital low-energy subspace using different many-body approaches: $GW$, dynamical mean field theory (DMFT), extended DMFT (EDMFT) and $GW$+EDMFT, with realistic frequency-dependent interaction parameters. The nonlocal correlation and screening effects captured by $GW$+EDMFT result in an instability towards the formation of charge stripes, with the $3d_{z^2}$ as the main active orbital. We also comment on the potential relevance of the rare-earth self-doping pocket, since hole doping suppresses the ordering tendency.
description: Published version
Orientation Dependent Thermal Conductance in Single-Layer MoS2
Creators: name: Jiang, Jin-Wu
name: Zhuang, Xiaoying
name: Rabczuk, Timon
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We investigate the thermal conductivity in the armchair and zigzag MoS$_{2}$ nanoribbons, by combining the non-equilibrium Green's function approach and the first-principles method. A strong orientation dependence is observed in the thermal conductivity. Particularly, the thermal conductivity for the armchair MoS$_{2}$ nanoribbon is about 673.6 Wm$^{-1}$K$^{-1}$ in the armchair nanoribbon, and 841.1 Wm$^{-1}$K$^{-1}$ in the zigzag nanoribbon at room temperature. By calculating the Caroli transmission, we disclose the underlying mechanism for this strong orientation dependence to be the fewer phonon transport channels in the armchair MoS$_{2}$ nanoribbon in the frequency range of [150, 200] {cm$^{-1}$}. Through the scaling of the phonon dispersion, we further illustrate that the thermal conductivity calculated for the MoS$_{2}$ nanoribbon is esentially in consistent with the superior thermal conductivity found for graphene.
description: accepted by Scientific Report
title: Σύστημα σύστασης ταινιών με αυτόματη επεξεργασία κειμένων από το διαδίκτυο
Creators: name: Κεραμμύδας Παναγιώτης
Publisher: name: Technical University of Crete
Year: 2010

description: Μη διαθέσιμο
Radio Unnameable
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019
Subjects: Lounge music

description: Bob, Michael and Adrienne Callahan, and Ken McLaren in studio take phone calls then recorded music; call-in from mentally ill individual with methodone and alcohol addiction, discussion with call-ins about Freelandia airline, lounge music, Michael Martin Murphey's 'Drunken Lady of the Morning', 'The Morning After the Night Before'
Dimensional contraction via Markov transportation distance
Creators: name: Bolley, François
name: Gentil, Ivan
name: Guillin, Arnaud
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics

description: It is now well known that curvature conditions à la Bakry-Emery are equivalent to contraction properties of the heat semigroup with respect to the classical quadratic Wasserstein distance. However, this curvature condition may include a dimensional correction which up to now had not induced any strenghtening of this contraction. We first consider the simplest example of the Euclidean heat semigroup, and prove that indeed it is so. To consider the case of a general Markov semigroup, we introduce a new distance between probability measures, based on the semigroup, and adapted to it. We prove that this Markov transportation distance satisfies the same properties for a general Markov semigroup as the Wasserstein distance does in the specific case of the Euclidean heat semigroup, namely dimensional contraction properties and Evolutional variational inequalities.
Topo-edaphic environment and forestry plantation disturbance affect the distribution of grassland forage and non-forage resources, Maputaland, South Africa
Creators: name: Starke, AP
name: O’Connor, TG
name: Everson, CS
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: 69999 Biological Sciences not elsewhere classified
subject: Plant Biology

description: Grasslands are integral to rural livelihoods in southern Africa, because they provide hydrological regulation services and a variety of plant resources, including livestock fodder, medicines, and food products. To ensure ongoing provision of these resources in rapidly developing rural landscapes, an understanding of the relationships between grassland species composition and ecosystem services is required. This study examines the provision of grassland forage and non-forage resources across five grassland types in relation to environmental determinants of site topography, soil conditions, and plantation-forestry disturbance. Grasslands characteristic of low-lying and fertile landscape positions were dominated by nutritious lawn grasses and therefore tended to complement rangeland practices, whereas grasslands associated with elevated areas or infertile conditions were diverse in species composition and consequently provided the majority of plant medicines, spiritual resources, fruit-beverage resources, oils, and craft materials. Secondary grassland, resulting from forestry plantation abandonment, had moderate forage potential and limited non-forage resources. Our results provide a simple framework for approaching grassland resource classification, grassland conservation and land use management on the Maputaland coastal plain.
title: Υλοποίηση συστήματος βιοπληροφορικής αποτελούμενο από ηλεκτρονικό υπολπγιστή και αναδιατασσόμενη λογική για επιτάχυνση του αλγορίθμου GlimmerHMM
Creators: name: Χρυσάνθου Ναυσικά
Publisher: name: Technical University of Crete
Year: 2010

description: Μη διαθέσιμο