cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Decoherence from Long-Range Forces in Atom Interferometry
Creators: name: Kunjummen, Jonathan
name: Carney, Daniel
name: Taylor, Jacob M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Atom interferometers provide a powerful means of realizing quantum coherent systems with increasingly macroscopic extent in space and time. These systems provide an opportunity for a variety of novel tests of fundamental physics, including ultralight dark matter searches and tests of modifications of gravity, using long drop times, microgravity. However, as experiments operate with longer periods of free fall and become sensitive to smaller background effects, key questions start to emerge about the fundamental limits to future atom interferometery experiments. We study the effects on atomic coherence from hard-to-screen backgrounds due to baths of ambient particles with long-range forces, such as gravitating baths and charged cosmic rays. Our approach - working in the Heisenberg picture for the atomic motion - makes proper inclusion of the experimental apparatus feasible and clearly shows how to handle long-range forces and preferred frame ambiguities. We find that these potential backgrounds are likely negligible for the next generation of interferometers, as aggressive estimates for the gravitational decoherence from a background bath of dark matter particles gives a decoherence timescale on the order of years.
description: 32 pages, 3 figures. Version accepted for publication
Quantisation ambiguities and the effective dynamics of scalar-tensor theories in loop quantum cosmology
Creators: name: Han, Yu
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The Hamiltonian constraint of scalar-tensor theories in the Jordan frame is quantised using three quantisation prescriptions in loop quantum cosmology, from which we obtain three different effective Hamiltonian constraints. The corresponding effective equations of motion derived from these effective Hamiltonian constraints turn out to be drastically different. The implications of each set of effective equations of motion are discussed in detail. In the latter half of this paper, as a concrete example, we study the effective dynamics of a specific model with the non-minimal coupling function $F(ϕ)=1+ξκϕ^2$ and self-interacting quartic potential. Using numerical results, we find different features for different effective dynamics. Moreover, it is also found that the spacetime singularity is absent and the cosmological bounce exists in each effective dynamics of this model.
description: 32 pages, 7 figures
The Einstein@Home search for radio pulsars and PSR J2007+2722 discovery
Creators: name: Allen, B.
name: Knispel, B.
name: Cordes, J. M.
name: Deneva, J. S.
name: Hessels, J. W. T.
name: Anderson, D.
name: Aulbert, C.
name: Bock, O.
name: Brazier, A.
name: Chatterjee, S.
name: Demorest, P. B.
name: Eggenstein, H. B.
name: Fehrmann, H.
name: Gotthelf, E. V.
name: Hammer, D.
name: Kaspi, V. M.
name: Kramer, M.
name: Lyne, A. G.
name: Machenschalk, B.
name: McLaughlin, M. A.
name: Messenger, C.
name: Pletsch, H. J.
name: Ransom, S. M.
name: Stairs, I. H.
name: Stappers, B. W.
name: Bhat, N. D. R.
name: Bogdanov, S.
name: Camilo, F.
name: Champion, D. J.
name: Crawford, F.
name: Desvignes, G.
name: Freire, P. C. C.
name: Heald, G.
name: Jenet, F. A.
name: Lazarus, P.
name: Lee, K. J.
name: van Leeuwen, J.
name: Lynch, R.
name: Papa, M. A.
name: Prix, R.
name: Rosen, R.
name: Scholz, P.
name: Siemens, X.
name: Stovall, K.
name: Venkataraman, A.
name: Zhu, W.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Einstein@Home aggregates the computer power of hundreds of thousands of volunteers from 193 countries, to search for new neutron stars using data from electromagnetic and gravitational-wave detectors. This paper presents a detailed description of the search for new radio pulsars using Pulsar ALFA survey data from the Arecibo Observatory. The enormous computing power allows this search to cover a new region of parameter space; it can detect pulsars in binary systems with orbital periods as short as 11 minutes. We also describe the first Einstein@Home discovery, the 40.8 Hz isolated pulsar PSR J2007+2722, and provide a full timing model. PSR J2007+2722's pulse profile is remarkably wide with emission over almost the entire spin period. This neutron star is most likely a disrupted recycled pulsar, about as old as its characteristic spin-down age of 404 Myr. However there is a small chance that it was born recently, with a low magnetic field. If so, upper limits on the X-ray flux suggest but can not prove that PSR J2007+2722 is at least ~ 100 kyr old. In the future, we expect that the massive computing power provided by volunteers should enable many additional radio pulsar discoveries.
description: ArXiv version updated to correspond to the published ApJ version. This includes pulse profiles for PSR J2007+2722 at 327 and 430 MHz, correction of a sign error in the polarimetry conventions, improvements to the estimate of the expected shortest orbital period of a Galactic DNS system, and other changes made in refereeing and proof. 32 pages, 19 figures, 7 tables
On field-driven domain wall motion in compensated ferrimagnetic nanowires
Creators: name: Jing, K. Y.
name: Gong, X.
name: Wang, X. R.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The fascinating high-speed field-driven domain wall (DW) motion along ferrimagnetic nanowires near the angular momentum compensation point (AMCP) is solved based on the generic ferrimagnetic dynamics. The physics of the absences of precessional torque and infinite high Walker breakdown field at the AMCP is proved under general conditions. Based on the energy conservation principle, an almost exact DW velocity formula, valid beyond the Walker breakdown field, is obtained. Our results agree with all existing experiments and simulations. This theory provides useful guidances to DW manipulation.
Graphene Based Plasmonic Tunable Low Pass Filters in the THz Band
Creators: name: Serrano, D. Correas
name: Diaz, J. S. Gomez
name: Perruisseau-Carrier, J.
name: Melcon, A. Alvarez
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We propose the concept, synthesis, analysis, and design of graphene-based plasmonic tunable low-pass filters operating in the THz band. The proposed structure is composed of a graphene strip transferred onto a dielectric and a set of polysilicon DC gating pads located beneath it. This structure implements a stepped impedance low-pass filter for the propagating surface plasmons by adequately controlling the guiding properties of each strip section through graphene's field effect. A synthesis procedure is presented to design filters with desired specifications in terms of cut-off frequency, in-band performance, and rejection characteristics. The electromagnetic modeling of the structure is efficiently performed by combining an electrostatic scaling law to compute the guiding features of each strip section with a transmission line and transfer-matrix framework, approach further validated via full wave simulations. The performance of the proposed filters is evaluated in practical scenarios, taking into account the presence of the gating bias and the influence of graphene's losses. These results, together with the high miniaturization associated with plasmonic propagation, are very promising for the future use and integration of the proposed filters with other graphene and silicon-based elements in innovative THz communication systems.
description: 14 pages, 15 figures, 4 tables, IEEE Transactions on Nanotechnology, 2014
The Transcription Challenge Framework (TCF)
Creators: name: Morreale, Laura
Publisher: name: Zenodo
Year: 2021
Subjects: transcription, crowd-sourcing, manuscripts

description: From May 2020 until January 2021, scholars Benjamin Albritton and Laura Morreale organized four Transcription Challenges, a series of digital competitions to brought together teams of scholars to collaboratively transcribe different manuscript-bound versions of one text over a two-week period. The success of these events has encouraged the organizers to formalize the transcription challenge framework (TCF), to support similar events within the community of scholars interested in Medieval Studies and any other field which relies upon manuscript-based materials. This paper sets out the history, rationale, and work-flows necessary within the TCF, thereby promoting engagement with hand-written materials by scholars across disciplines, locales, and subspecialities.
Addressing the challenges of detecting time-overlapping compact binary coalescences
Creators: name: Relton, Philip
name: Virtuoso, Andrea
name: Bini, Sophie
name: Raymond, Vivien
name: Harry, Ian
name: Drago, Marco
name: Lazzaro, Claudia
name: Miani, Andrea
name: Tiwari, Shubhanshu
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Standard detection and analysis techniques for transient gravitational waves make the assumption that detector data contains, at most, one signal at any time. As detectors improve in sensitivity, this assumption will no longer be valid. In this paper we examine how current search techniques for transient gravitational waves will behave under the presence of more than one signal. We perform searches on data sets containing time-overlapping compact binary coalescences. This includes a modelled, matched filter search (PyCBC), and an unmodelled coherent search, coherent WaveBurst (cWB). Both of these searches are used by the LIGO-Virgo-KAGRA collaboration. We find that both searches are capable of identifying both signals correctly when the signals are dissimilar in merger time, $|Δt_c| \geq 1$ second, with PyCBC losing only $1\%$ of signals for overlapping binary black hole mergers. Both pipelines can find signal pairings within the region $|Δt_c| < 1$ second. However, clustering routines in the pipelines will cause only one of the two signals to be recovered, as such the efficiency is reduced. Within this region, we find that cWB can identify both signals. We also find that matched filter searches can be modified to provide estimates of the correct parameters for each signal.
description: 17 pages, 12 figures, 4 tables
Light stops emerging in WW cross section measurements?
Creators: name: Rolbiecki, Krzysztof
name: Sakurai, Kazuki
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Recent ATLAS and CMS measurements show a slight excess in the WW cross section measurement. While still consistent with the Standard Model within 1-2 sigma, the excess could be also a first hint of physics beyond the Standard Model. We argue that this effect could be attributed to the production of scalar top quarks within supersymmetric models. The stops of mstop_1 ~ 200 GeV has the right pair-production cross section and under some assumptions can significantly contribute to the final state of two leptons and missing energy. We scan this region of parameter space to identify stop mass range preferred by the WW cross section measurements. Taking one sample benchmark point we show that it can be consistent with low energy observables and Higgs sector measurements and propose a method to distinguish supersymmetric signal from the Standard Model contribution.
description: 16 pages, 5 figures, minor revision, discussion of asymmetry expanded, to appear in JHEP
FuDFEND: Fuzzy-domain for Multi-domain Fake News Detection
Creators: name: Liang, Chaoqi
name: Zhang, Yu
name: Li, Xinyuan
name: Zhang, Jinyu
name: Yu, Yongqi
Publisher: name: arXiv
Year: 2022
Subjects: subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: On the Internet, fake news exists in various domain (e.g., education, health). Since news in different domains has different features, researchers have be-gun to use single domain label for fake news detection recently. This emerg-ing field is called multi-domain fake news detection (MFND). Existing works show that using single domain label can improve the accuracy of fake news detection model. However, there are two problems in previous works. Firstly, they ignore that a piece of news may have features from different domains. The single domain label focuses only on the features of the news on particu-lar domain. This may reduce the performance of the model. Secondly, their model cannot transfer the domain knowledge to the other dataset without domain label. In this paper, we propose a novel model, FuDFEND, which solves the limitations above by introducing the fuzzy inference mechanism. Specifically, FuDFEND utilizes a neural network to fit the fuzzy inference process which constructs a fuzzy domain label for each news item. Then, the feature extraction module uses the fuzzy domain label to extract the multi-domain features of the news and obtain the total feature representation. Fi-nally, the discriminator module uses the total feature representation to dis-criminate whether the news item is fake news. The results on the Weibo21 show that our model works better than the model using only single domain label. In addition, our model transfers domain knowledge better to Thu da-taset which has no domain label.
COMPLEX TREATMENT OF PREGNANT WOMEN WITH UNDIFFERENTIATED CONNECTIVE TISSUE DYSPLASIA
Creators: name: Khudoyarova, D.R.
name: Shodikulova, G.Z.
name: Yunusova, Z.M.
Publisher: name: Zenodo
Year: 2024

description: Dysplasia (disorder of formation) of connective tissue is a genetically determined pathological condition of organs and tissues, manifested in a decrease in the content of certain types of collagen or a violation of their ratio and leading to a decrease in the strength of the connective tissue of many organs and systems. complex therapy with Magnerot and BIMPnch in pregnant women with uCDT can reduce the severity of clinical manifestations of NCD syndrome and improve QoL. In pregnant women with signs of circulatory disorders in the mother-placenta-fetus system, the proposed therapy improves hemodynamic indicators.
Early results from GLASS-JWST. VII: evidence for lensed, gravitationally bound proto-globular clusters at z=4 in the Hubble Frontier Field A2744
Creators: name: Vanzella, E.
name: Castellano, M.
name: Bergamini, P.
name: Treu, T.
name: Mercurio, A.
name: Scarlata, C.
name: Rosati, P.
name: Grillo, C.
name: Acebron, A.
name: Caminha, G. B.
name: Nonino, M.
name: Nanayakkara, T.
name: Roberts-Borsani, G.
name: Bradac, M.
name: Wang, X.
name: Brammer, G.
name: Strait, V.
name: Vulcani, B.
name: Mestric, U.
name: Meneghetti, M.
name: Calura, F.
name: Henry, A.
name: Zanella, A.
name: Trenti, M.
name: Boyett, K.
name: Morishita, T.
name: Calabro, A.
name: Glazebrook, K.
name: Marchesini, D.
name: Birrer, S.
name: Yang, L.
name: Jones, T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the blue and optical rest-frame sizes (lambda~2300A-4000A) of three compact star-forming regions in a galaxy at z=4 strongly lensed (x30, x45, x100) by the Hubble Frontier Field galaxy cluster A2744 using GLASS-ERS JWST/NIRISS imaging at 1.15um, 1.50mu and 2.0mu with PSF < 0.1". In particular, the Balmer break is probed in detail for all multiply-imaged sources of the system. With ages of a few tens of Myr, stellar masses in the range (0.7-4.0) x 10^6 Msun and optical/ultraviolet effective radii spanning the interval 3 < R_eff < 20 pc, such objects are currently the highest redshift (spectroscopically-confirmed) gravitationally-bound young massive star clusters (YMCs), with stellar mass surface densities resembling those of local globular clusters. Optical (4000A, JWST-based) and ultraviolet (1600A, HST-based) sizes are fully compatible. The contribution to the ultraviolet underlying continuum emission (1600A) is ~30%, which decreases by a factor of two in the optical for two of the YMCs (~4000A rest-frame), reflecting the young ages (<30 Myr) inferred from the SED fitting and supported by the presence of high-ionization lines secured with VLT/MUSE. Such bursty forming regions enhance the sSFR of the galaxy, which is ~10 Gyr^-1. This galaxy would be among the extreme analogs observed in the local Universe having high star formation rate surface density and high occurrence of massive stellar clusters in formation.
description: 10 pages, 4 figures, 1 table. Submitted to ApJL
[Damals (Heft 12,1998) / Welt und Umwelt der Bibel (Heft 11,1999) / Geschichte lernen Nr. 67, 1999 ...]
Creators: name: Rabl, Josef
Publisher: name: Forum Classicum
Year: 2017

description: -
description: Forum Classicum, Nr. 1 (1999): Forum Classicum
5G-ROUTES: D6.1 Dissemination & Communication plans and activities
Creators: name: Pubill, David
Publisher: name: Zenodo
Year: 2022

description: D6.1 is associated to the Task 6.1 – “Dissemination and Communication Activities” (led by CTTC), which implements the dissemination and communication of the project goals, reports, results, achievements, and other outputs. In particular, this initial deliverable on dissemination and communication activities identifies the target audiences, ranging from general public through scientific and academic communities up to specific 5G stakeholders and market actors. In addition, the dissemination and communication channels and actions are defined, while a thorough communication plan is developed, which incorporates innovative methods for sharing information with the public and interested stakeholders, in accordance with the dissemination strategy. This deliverable will set the basis for the upcoming D6.2 and D6.3 (interim and final report, respectively), which will detail the dissemination and communication activities until the end of the project.
title: Γεωπολυμερισμός θαλάσσιων ιζημάτων
Creators: name: Λεωνιδακη Κωνσταντια
Publisher: name: Technical University of Crete
Year: 2015

description: Η διαχείριση και αξιοποίηση των βιομηχανικών, μεταλλευτικών και μεταλλουργικών αποβλήτων αποτελεί αντικείμενο έρευνας των τελευταίων χρόνων, ενώ ταυτόχρονα νέες τεχνολογίες φιλικές προς το περιβάλλον αναπτύσσονται συνεχώς. Ο γεωπολυμερισμός είναι μία καινοτόμος τεχνολογία, μέσω της οποίας μπορούν να αξιοποιηθούν μεγάλες ποσότητες αποβλήτων περιορίζοντας ταυτόχρονα τις περιβαλλοντικές επιπτώσεις που προκύπτουν από την ανεξέλεγκτη διάθεσή τους σε χώρους υγειονομικής ταφής.
Στόχος της παρούσας μεταπτυχιακής εργασίας είναι η διερεύνηση της δυνατότητας γεωπολυμερισμού ιζημάτων που συλλέχτηκαν από τα λιμάνια της Σούδας (Ν. Χανίων) και της Πάτρας καθώς και η συνδιαχείρισή τους με απόβλητα εκσκαφών, κατασκευών και κατεδαφίσεων (ΑΕΚΚ), σκωρία σιδηρονικελίου της εταιρίας ΛΑΡΚΟ Α.Ε. και ιπτάμενη τέφρα των θερμοηλεκτρικών σταθμών Μεγαλόπολης ώστε τελικά να προκύψουν δευτερογενή προϊόντα με επιθυμητές εφαρμογές και υψηλή προστιθέμενη αξία. Η επίδραση διάφορων παραγόντων (συγκέντρωση του αλκαλικού διαλύματος, θερμοκρασία θέρμανσης, περίοδος θέρμανσης και ωρίμανσης, αναλογία πρώτων υλών) που διαδραματίζουν σημαντικό ρόλο κατά το μηχανισμό γεωπολυμερισμού διερευνάται μέσω δοκιμών αντοχής σε θλίψη, ώστε να βελτιστοποιηθεί η διαδικασία σύνθεσης.
Για τη σύνθεση των γεωπολυμερών οι στερεές πρώτες ύλες αναμίχθηκαν με αλκαλικό διάλυμα ενεργοποίησης (pellets ΚΟΗ, απιονισμένο νερό και διάλυμα Na2SiO3) και μετά από συνεχή μηχανική ανάδευση, ο πολφός χυτεύτηκε σε κυβικές μήτρες ώστε να προκύψουν γεωπολυμερή σε διάφορες συνθήκες σύνθεσης (θέρμανση στους 40, 60 και 80 οC, συγκέντρωση 2-10 Μ ΚΟΗ), τα οποία υποβλήθηκαν σε δοκιμές μονοαξονικής θλίψης. Για τον προσδιορισμό της ανθεκτικότητας των γεωπολυμερών, τα δοκίμια που παρασκευάστηκαν στις βέλτιστες συνθήκες υποβλήθηκαν σε εναλλασσόμενους κύκλους ψύξης – θέρμανσης (θερμοκρασίες μεταξύ -15 και 60 oC) και σε θέρμανση σε υψηλές θερμοκρασίες (400, 600 και 800 °C). Ακόμη μελετήθηκε η γεωχημική σταθερότητα των γεωπολυμερών μετά από εμβάπτισή τους σε διάλυμα απιονισμένου και θαλασσινού νερού για χρονικό διάστημα έως 5 μήνες.
Από τα γεωπολυμερή που παρασκευάστηκαν στην παρούσα μεταπτυχιακή εργασία, τα πλακάκια με προσθήκη ιζήματος γεωπολυμερίζονται επιτυχώς αποκτώντας υψηλές τιμές αντοχής σε θλίψη (42 MPa), ενώ ιδιαίτερα υψηλές αντοχές (57 MPa) προέκυψαν για τα γεωπολυμερή από σκωρία και ίζημα. Τα γεωπολυμερή από σκυρόδεμα απέκτησαν εμφανώς χαμηλότερες αντοχές σε θλίψη, που σε καμία περίπτωση δε ξεπέρασαν τα 18 MPa. Για τη διερεύνηση της μορφολογίας  και της μικροδομής των γεωπολυμερών χρησιμοποιήθηκαν οι ακόλουθοι μέθοδοι ορυκτολογικής ανάλυσης: XRD, SEM, FTIR και TG. Αν και τα γεωπολυμερή χαρακτηρίζονται ως άμορφα, με τις παραπάνω τεχνικές είναι δυνατή η κατανόηση των πολύπλοκων μηχανισμών γεωπολυμερισμού.
Time Dependent Photoionization Modeling of Warm Absorbers in Active Galactic Nuclei
Creators: name: Sadaula, Dev R
name: Bautista, Manuel A
name: Garcia, Javier A
name: Kallman, Timothy R
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Warm absorber spectra contain bound-bound and bound-free absorption features seen in the X-ray and UV spectra from many active galactic nuclei (AGN). The widths and centroid energies of these features indicate they occur in outflowing gas, and the outflow can affect the gas within the host galaxy. Thus the warm absorber mass and energy budgets are of great interest. Estimates for these properties depend on models which connect the observed strengths of the absorption features with the density, composition, and ionization state of the absorbing gas. Such models assume that the ionization and heating of the gas come primarily from the strong continuum near the central black hole. They also assume that the various heating, cooling, ionization, and recombination processes are in a time-steady balance. This assumption may not be valid, owing to the intrinsic time-variability of the illuminating continuum, or other factors which change the cloud environment. This paper presents models for warm absorbers which follow the time dependence of the ionization, temperature, and radiation field in warm absorber gas clouds in response to a changing continuum illumination. We show that the effects of time variability are important over a range of parameter values, that time dependent models differ from equilibrium models in important ways, and that these effects should be included in models which derive properties of warm absorber outflows.
K. Brodersen (Hrsg.): Liebesleiden in der Antike. Die „Erotika Pathemata“ des Parthenios
Creators: name: Lobe, Michael
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: K. Brodersen (Hrsg.): Liebesleiden in der Antike. Die „Erotika Pathemata“ des Parthenios. WBG Darmstadt (Primus) 2000. 141 S. (ISBN 3-89678-182-0).
description: Forum Classicum, Nr. 4 (2001): Forum Classicum
Janet Wartington
Creators: name: (:Unav)
Publisher: name: Columbia University
Year: 2019
Subjects: Demonstrations
Trials

description: A continuation of BF0627, reporting on the protests at the 1968 Democratic Convention. The Beatles song "Revolution" plays. There is news coverage of the Trial of Bobby Seale, with clips from October 22 and October 27, 1969 focusing on Seale's desire to defend himself in court. On November 5, 1969 there is coverage of Seale's sentencing for contempt of court. There is also audio of Seale speaking after the trial referencing an incident in court when he was bound to his chair and gagged.
Connectivity of friends-and-strangers graphs on random pairs
Creators: name: Wang, Lanchao
name: Chen, Yaojun
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Consider two graphs $X$ and $Y$, each with $n$ vertices. The friends-and-strangers graph $\mathsf{FS}(X,Y)$ of $X$ and $Y$ is a graph with vertex set consisting of all bijections $σ:V(X) \mapsto V(Y)$, where two bijections $σ$, $σ'$ are adjacent if and only if they differ precisely on two adjacent vertices of $X$, and the corresponding mappings are adjacent in $Y$. The most fundamental question that one can ask about these friends-and-strangers graphs is whether or not they are connected. Alon, Defant, and Kravitz showed that if $X$ and $Y$ are two independent random graphs in $\mathcal{G}(n,p)$, then the threshold probability guaranteeing the connectedness of $\mathsf{FS}(X,Y)$ is $p_0=n^{-1/2+o(1)}$, and suggested to investigate the general asymmetric situation, that is, $X\in \mathcal{G}(n,p_1)$ and $Y\in \mathcal{G}(n,p_2)$. In this paper, we show that if $p_1 p_2 \ge p_0^2=n^{-1+o(1)}$ and $p_1, p_2 \ge w(n) p_0$, where $w(n)\rightarrow 0$ as $n\rightarrow \infty$, then $\mathsf{FS}(X,Y)$ is connected with high probability, which extends the result on $p_1=p_2=p$, due to Alon, Defant, and Kravitz.
description: 16 pages, 1 fighres. This is a version revised mainly under very careful comments from the anonymous referees. arXiv admin note: substantial text overlap with arXiv:2009.07840 by other authors
Ursula Greiff, Dichter und Herrscher in lateinischen Gedichten aus der Mark Brandenburg (16. und 17. Jahrhundert)
Creators: name: Kipf, Stefan
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Ursula Greiff, Dichter und Herrscher in lateinischen Gedichten aus der Mark Brandenburg (16. und 17. Jahrhundert), in: Spolia Berolinensia, Berliner Beiträge zur Geistes- und Kulturgeschichte des Mittelalters und der Neuzeit, hrsg. von Wolfgang Maaz und Werner Röcke, Bd. 26, Hildesheim: Olms 2006 (ISBN3-615-00325-X).
description: Forum Classicum, Nr. 1 (2009): Forum Classicum
The inverse problem of pure point diffraction -- examples and open questions
Creators: name: Terauds, Venta
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: This paper considers some open questions related to the inverse problem of pure point diffraction, in particular, what types of objects may diffract, and which of these may exhibit the same diffraction. Some diverse objects with the same simple lattice diffraction are constructed, including a tempered distribution that is not a measure, and it is shown that there are uncountably many such objects in the diffraction solution class of any pure point diffraction measure with an infinite supporting set.
description: 16 pages, revised version
Implications for Cosmic Domain Walls from LIGO-Virgo First Three Observing Runs
Creators: name: Jiang, Yang
name: Huang, Qing-Guo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We put constraints on the normalized energy density in gravitaional waves from cosmic domain walls (DWs) by searching for the stochastic gravitational-wave background (SGWB) in the data of Advanced LIGO and Virgo's first three observing runs. By adopting a phenomenological broken power-law model, we obtain the upper limit of normalized energy density of SGWB generated by DWs in the peak frequency band $10\sim200$ Hz, and get the most stringent limitation at the peak frequency $f_*=35$ Hz, namely $Ω_\text{DW}(f_*=35\,\text{Hz})<1.4\times10^{-8}$ at $95\%$ confidence level (CL). Subsequently, we work out the constraints on the parameter space in the appealing realization of DW structure -- the heavy axion model which can avoid the so-called quality problem.
description: 7 pages, 2 tables and 4 figures
Duality Cascades and Parallelotopes
Creators: name: Furukawa, Tomohiro
name: Moriyama, Sanefumi
name: Sasaki, Hikaru
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Duality cascades are a series of duality transformations in field theories, which can be realized as the Hanany-Witten transitions in brane configurations on a circle. In the setup of the ABJM theory and its generalizations, from the physical requirement that duality cascades always end and the final destination depends only on the initial brane configuration, we propose that the fundamental domain of supersymmetric brane configurations in duality cascades can tile the whole parameter space of relative ranks by translations, hence is a parallelotope. We provide our arguments for the proposal.
description: 37 pages, 9 eps figures; v2: section 2.2 added, four figures added
title: Μοντελοποίηση και βέλτιστη διαστασιολόγηση συστήματος άντλησης ταμίευσης για αξιοποίηση της απορριπτόμενης ενέργειας σε μη διασυνδεδεμένα συστήματα ηλεκτρικής ενέργειας. Εφαρμογή στο Φράγμα Ποταμών στο Ρέθυμνο Κρήτης
title: Modeling and optimal dimensioning of a pump–storage system for the exploitation of the rejected energy in non – interconnected electrical power systems. Case - study in Potamon Dam, Rethymno Crete
Creators: name: Τσαμουδαλης Κωνσταντινος
Publisher: name: Technical University of Crete
Year: 2019

description: The purpose of this project is to investigate the optimal configuration of the Amari Hybrid Power Station (HPS), including the sizing of its individual components and the selection of the guaranteed capacity of the station. The purpose of this project is to investigate the rejected energy from the non-interconnected electricity system of Crete. Taking into account the rejected energy of Crete for 2015 as given by the lab of hydraulic machines of National Technical University a research will take place about the optimal configuration of the Amari Hybrid Power Station (HPS), including the sizing of its individual components and the selection of the guaranteed capacity of the station. The energy discharged from the wind farms of Crete is absorbed by the pumping plant and converted to hydraulic. This is achieved by pumping the water from the lower reservoir to the upper reservoir. For optimization, Net Present Value is used as a criterion for an investment life cycle of 25 years. The dimensioning of the above components is based on mathematical simulation results of the system operation that is performed in the Matlab programming tool.
description: Στην παρούσα εργασία μελετάται η αποθήκευση απορριπτόμενης ενέργειας στο μη διασυνδεδεμένο σύστημα ηλεκτρικής Ενέργειας της Κρήτης. Έχοντας σαν δεδομένο την χρονοσειρά απορριπτόμενης ενέργειας του 2015 της Κρήτης όπως δόθηκε από το Μετσόβιο Πολυτεχνείου, μελετάται ο σχεδιασμός του αναστρέψιμου Υδροηλεκτρικού Έργου (Pumped Storage System) του Φράγματος Ποταμών στο Ρέθυμνο Κρήτης. H απορριπτόμενη ενέργεια από τα αιολικά πάρκα της Κρήτης απορροφάται από την αντλητική εγκατάσταση και μετατρέπεται σε υδραυλική. Αυτό επιτυγχάνεται από την άντληση του νερού από τον κάτω ταμιευτήρα στον ταμιευτήρα με το μεγαλύτερο ύψος. Η αποθηκευμένη υδραυλική ενέργεια στη συνέχεια, όταν απαιτείται, μετατρέπεται σε ηλεκτρική τροφοδοτώντας το ηλεκτρικό δίκτυο με εγγυημένη ενέργεια. Αντικείμενο αυτής της διπλωματικής είναι η βελτιστοποίηση της διαστασιολόγησης των κυρίων συνιστωσών του έργου (του πλήθους των αντλιών, ονομαστική παροχή αντλιών, της ισχύος υδροστροβίλου και της χωρητικότητας των δεξαμενών). Για την βελτιστοποίηση χρησιμοποιείται σαν κριτήριο η Καθαρή Παρούσα Αξία για οικονομικό κύκλο ζωής της επένδυσης 25 έτη. Η διαστασιολόγηση των παραπάνω συνιστωσών βασίζεται σε αποτελέσματα μαθηματικής προσομοίωσης της λειτουργίας του συστήματος που πραγματοποιείται στο προγραμματιστικό εργαλείο Μatlab.​​​​​​​
Software for: Fate specification is spatially intermingled across planarian stem cells
Creators: name: Giselle Marie Valdes
Publisher: name: Zenodo
Year: 2023

description: Scripts implemented in Park, C., Owusu-Boaitey, K.E., Valdes, G.M. et al., 2023. Fate specification is spatially intermingled across planarian stem cells. Nat Commun.
Causal interpretation of stochastic differential equations
Creators: name: Sokol, Alexander
name: Hansen, Niels Richard
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: We give a causal interpretation of stochastic differential equations (SDEs) by defining the postintervention SDE resulting from an intervention in an SDE. We show that under Lipschitz conditions, the solution to the postintervention SDE is equal to a uniform limit in probability of postintervention structural equation models based on the Euler scheme of the original SDE, thus relating our definition to mainstream causal concepts. We prove that when the driving noise in the SDE is a Lévy process, the postintervention distribution is identifiable from the generator of the SDE.
Enhancing the performance of coupled quantum Otto thermal machines without entanglement and quantum correlations
Creators: name: Makouri, Abdelkader El
name: Slaoui, Abdallah
name: Daoud, Mohammed
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We start with a revision study of two coupled spin-$1/2$ under the influence of Kaplan-Shekhtman-Entin-Wohlman-Aharony (KSEA) interaction and a magnetic field. We first show the role of idle levels, i.e., levels that do not couple to the external magnetic field, when the system is working as a heat engine as well as when it is a refrigerator. Then we extend the results reported in [PRE. 92, (2015) 022142] by showing that it is not necessary to change both the magnetic field as well as the coupling parameters to break the extensive property of the work extracted globally from two coupled spin-$1/2$ as has been demonstrated there. Then we study the role of increasing the number of coupled spins on efficiency, extractable work, and coefficient of performance (COP). First, we consider two- and three-coupled spin-$1/2$ Heisenberg $\mathrm{XXX}$-chain. We prove that the latter can outperform the former in terms of efficiency, extractable work, and COP. Then we consider the Ising model, where the number of interacting spins ranges from two to six. We show that only when the number of interacting spins is odd the system can work as a heat engine in the strong coupling regime. The enhancements in efficiency and COP are explored in detail. Finally, this model confirms the idea that entanglement and quantum correlations are not the reasons behind the enhancements observed in efficiency, extracatable work, and COP, but only due to the structure of the energy levels of the Hamiltonian of the working substance. In addition to this, the extensive property of global work as well, is not affected by entanglement and quantum correlations.
description: Published version in J. Phys. B: At. Mol. Opt. Phys
Experimental realization of a high precision tunable hexagonal optical lattice
Creators: name: Liu, Jin-Yu
name: Luo, Guang-Quan
name: Wang, Xiao-Qiong
name: Hemmerich, Andreas
name: Xu, Zhi-Fang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: Hexagonal optical lattices offer a tunable platform to study exotic orbital physics in solid state materials. Here, we present a versatile high-precision scheme to implement a hexagonal optical lattice potential, which is engineered by overlapping two independent triangular optical sublattices generated by laser beams with slightly different wavelengths around 1064 nm. This enables us to precisely control the detailed structure of the hexagonal lattice by adjusting the relative position and the relative lattice depth of the two triangular optical sublattices. Taking advantage of the sensitive dependence of the second Bloch band on small lattice deformations, we propose a strategy to optimize the optical lattice geometry with an extremely high precision. This method can also be extended to other lattice configurations involving more than two sublattices. Our work provides the experimental requirements in the search for novel orbital physics of ultracold atoms, for example, in the flat $p$-band of the hexagonal optical lattice.
description: 9 pages, 4 figures
Characterization of noise regimes in Mid-IR free-space optical communication based on quantum cascade lasers
Creators: name: Seminara, Marco
name: Gabbrielli, Tecla
name: Corrias, Nicola
name: Borri, Simone
name: Consolino, Luigi
name: Meucci, Marco
name: De Natale, Paolo
name: Cappelli, Francesco
name: Catani, Jacopo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Signal Processing (eess.SP)
subject: Systems and Control (eess.SY)
subject: Applied Physics (physics.app-ph)
subject: Optics (physics.optics)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: The recent development of Quantum Cascade Lasers (QCLs) represents one of the biggest opportunities for the deployment of a new class of Free Space Optical (FSO) communication systems working in the mid-infrared (Mid-IR) wavelength range. As compared to more common FSO systems exploiting the telecom range, the larger wavelength employed in Mid-IR systems delivers exceptional benefits in case of adverse atmospheric conditions, as the reduced scattering rate strongly suppresses detrimental effects on the FSO link length given by the presence of rain, dust, fog and haze. In this work, we use a novel FSO testbed operating at \SI{4.7}{\micro m}, to provide a detailed experimental analysis of noise regimes that could occur in realistic FSO Mid-IR systems based on QCLs. Our analysis reveals the existence of two distinct noise regions, corresponding to different realistic channel attenuation conditions, which are precisely controlled in our setup. To relate our results with real outdoor configurations, we combine experimental data with predictions of an atmospheric channel loss model, finding that error-free communication could be attained for effective distances up to 8~km in low visibility conditions of 1 km. Our analysis of noise regimes may have a key relevance for the development of novel, long-range FSO communication systems based on Mid-IR QCL sources
In-situ extreme mass ratio inspirals via sub-parsec formation and migration of stars in thin, gravitationally unstable AGN discs
Creators: name: Derdzinski, Andrea
name: Mayer, Lucio
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We investigate the properties of stars born via gravitational instability in accretion discs around supermassive black holes (SMBHs) in active galactic nuclei (AGN), and how this varies with the SMBH mass, accretion rate, or viscosity. We show with geometrically thin, steady-state disc solutions that fragmentation results in different populations of stars when one considers the initial conditions (e.g. density and temperature of the gravitationally unstable regions). We find that opacity gaps in discs around $10^6 \rm M_{\odot}$ SMBHs can trigger fragmentation at radii $\lesssim 10^{-2}$ pc, although the conditions lead to the formation of initially low stellar masses around $0.1-0.5 \rm M_{\odot}$. Discs around more massive SMBHs ($M_{\rm BH} =10^{7-8} \rm M_{\odot}$) form moderately massive or supermassive stars (the majority at $10^{0-2} \rm M_{\odot}$). Using linear migration estimates, we discuss three outcomes: stars migrate till they are tidally destroyed, accreted as extreme mass ratio inspirals (EMRIs), or leftover after disc dispersal. For a single AGN activity cycle, we find a lower-limit for the EMRI rate $R_{\rm emri}\sim 0-10^{-4} \rm yr^{-1}$ per AGN assuming a SF efficiency $ε=1-30\%$. In cases where EMRIs occur, this implies a volumetric rate up to $0.5-10 \rm yr^{-1} Gpc^{-3}$ in the local Universe. The rates are particularly sensitive to model parameters for $M_{\rm BH}=10^6 \rm M_{\odot}$, for which EMRIs only occur if stars can accrete to $10$s of solar masses. Our results provide further evidence that gas-embedded EMRIs can contribute a substantial fraction of events detectable by milliHz gravitational wave detectors such as LISA. Our disc solutions suggest the presence of migration traps, as has been found for more massive SMBH discs. Finally, the surviving population of stars after the disc lifetime leaves implications for stellar discs in galactic nuclei.
Recurrence Relations of the Multi-Indexed Orthogonal Polynomials
Creators: name: Odake, Satoru
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mathematical Physics (math-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Classical Analysis and ODEs (math.CA)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Ordinary orthogonal polynomials are uniquely characterized by the three term recurrence relations up to an overall multiplicative constant. We show that the newly discovered M-indexed orthogonal polynomials satisfy 3+2M term recurrence relations with non-trivial initial data of the lowest M+1 members. These include the multi-indexed orthogonal polynomials of Laguerre, Jacobi, Wilson and Askey-Wilson types. The M=0 case is the corresponding classical orthogonal polynomials.
description: 27 pages. Comments and a reference added, reference information updated. To appear in J.Math.Phys
On the K-theory of groups with Finite Decomposition Complexity
Creators: name: Kasprowski, Daniel
Publisher: name: arXiv
Year: 2013
Subjects: subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics
subject: 18F25, 19D50 (Primary) 19G24, 20F69 (Secondary)

description: It is proved that the assembly map in algebraic K- and L-theory with respect to the family of finite subgroups is injective for groups $Γ$ with finite quotient finite decomposition complexity (a strengthening of finite decomposition complexity introduced by Guentner, Tesser and Yu) that admit a finite dimensional model for $\underbar EΓ$ and have an upper bound on the order of their finite subgroups. In particular this applies to finitely generated linear groups over fields with characteristic zero with a finite dimensional model for $\underbar EΓ$.
description: 35 pages; Several changes made due to referee report and a simplified definition of Karoubi filtration added; to appear in Proceedings of the London Mathematical Society
MOSAiC Data Policy
Creators: name: Immerz, Antonia
name: Frickenhaus, Stephan
name: von der Gathen, Peter
name: Shupe, Matthew
name: Morris, Sara
name: Nicolaus, Marcel
name: Schneebeli, Martin
name: Regnery, Julia
name: Fong, Allison
name: Snoeijs-Leijonmalm, Pauline
name: Geibert, Walter
name: Rabe, Ben
name: Herber, Andreas
name: Krumpen, Thomas
name: Singha, Suman
name: Jaiser, Ralf
name: Ransby, Daniela
name: Schumacher, Stefanie
name: Driemel, Amelie
name: Gerchow, Peter
name: Schäfer, Angela
name: Schewe, Ingo
name: Ajjan, Mohammad
name: Glöckner, Frank Oliver
name: Schäfer-Neth, Christian
name: Jones, Christopher
name: Goldstein, Jesse
name: Jones, Matt
name: Prakash, Giri
name: Rex, Markus
Publisher: name: Zenodo
Year: 2019
Subjects: Data Policy
MOSAiC
Multidisciplinary drifting Observatory for the Study of Arctic Climate
MOSAiC20192020
AWI_PS122_00

description: The Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) is a collaborative, international project to address pressing scientific questions in the central Arctic. The project’s success, and its ultimate impact on science and society, relies upon professional coordination and data sharing across the participants. A transparent Data Policy is essential to achieve MOSAiC science objectives, to facilitate collaboration, and to enable broad use and impact of the MOSAiC data legacy.
description: See https://spaces.awi.de/x/BJdrF for MOSAiC Data Policy further documentation.
The Cost of Deterministic, Adaptive, Automatic Algorithms: Cones, Not Balls
Creators: name: Clancy, Nicholas
name: Ding, Yuhan
name: Hamilton, Caleb
name: Hickernell, Fred J.
name: Zhang, Yizhi
Publisher: name: arXiv
Year: 2013
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65D05, 65D30, 65G20

description: Automatic numerical algorithms attempt to provide approximate solutions that differ from exact solutions by no more than a user-specified error tolerance. The computational cost is often determined \emph{adaptively} by the algorithm based on the function values sampled. While adaptive, automatic algorithms are widely used in practice, most lack \emph{guarantees}, i.e., conditions on input functions that ensure that the error tolerance is met. This article establishes a framework for guaranteed, adaptive, automatic algorithms. Sufficient conditions for success and two-sided bounds on the computational cost are provided in Theorems \ref{TwoStageDetermThm} and \ref{MultiStageThm}. Lower bounds on the complexity of the problem are given in Theorem \ref{complowbd}, and conditions under which the proposed algorithms have optimal order are given in Corollary \ref{optimcor}. These general theorems are illustrated for univariate numerical integration and function recovery via adaptive algorithms based on linear splines. The key to these adaptive algorithms is performing the analysis for \emph{cones} of input functions rather than balls. Cones provide a setting where adaption may be beneficial.
Correlated many-body calculation to study characteristics of Shannon information entropy for ultracold trapped interacting bosons
Creators: name: Haldar, Sudip Kumar
name: Chakrabarti, Barnali
name: Das, Tapan Kumar
name: Biswas, Anindya
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: A correlated many-body calculation is presented to characterize the Shannon information entropy of trapped interacting bosons. We reformulate the one-body Shannon information entropy in terms of the one-body probability density. The minimum limit of the entropy uncertainty relation (EUR) is approached by making $N$ very small in our numerical work. We examine the effect of correlations in the calculation of information entropy. Comparison with the mean-field result shows that the correlated basis function is indeed required to characterize the important features of the information entropies. We also accurately calculate the point of critical instability of an attractive BEC, which is in close agreement with the experimental value. Next we calculate two-body entropies in position and momentum spaces and study quantum correlations in the attractive BEC.
description: Accepted in Physical Review A (2013)