cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Slow and sausage loop mode excitation due to local and global spontaneous perturbations
Creators: name: Capettini, H.
name: Cécere, M.
name: Costa, A.
name: Krause, G.
name: Reula, O.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We analyse the capability of different type of perturbations -associated with usual environment energy fluctuations of the solar corona- to excite slow and sausage modes in solar flaring loops. We perform numerical simulations of the MHD ideal equations considering straight plasma magnetic tubes subject to local and global energy depositions. We find that local loop energy depositions of typical microflares [$\sim$($10^{27}$-$10^{30}$) erg] are prone to drive slow shock waves that induce slow mode patterns. The slow mode features are obtained for every tested local energy deposition inside the loop. Meanwhile, to obtain an observable sausage mode pattern a global perturbation, capable to modify instantaneously the internal loop temperature, is required, i.e. the characteristic conductive heating time must be much smaller than the radiative cooling one. Experiments carried out by varying parameter $β$ show us that the excitation of sausage modes does not depend significantly on the value of this parameter but on the global or local character of the energy source.
description: 9 pages, 14 figures
Varying Speed of Light, Modified Chaplygin Gas and Accelerating Universe
Creators: name: Singha, Anup Kumar
name: Debnath, Ujjal
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this paper, we have considered a model of modified Chaplygin gas in VSL theory with variable gravitational constant $G$. We have shown that the evolution of the universe starts from radiation era to phantom model. The whole evolution of the universe has been shown diagramatically by using statefinder parameters.
description: 5 latex pages, RevTeX style, 2 figures
Επέκταση βάσης αντιπροτύπων έργων λογισμικού:
Creators: name: Τηλεντζίδης, Κυριάκος Ιωσήφ
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Αντιπρότυπα
Περιηγητής ιστού
Αναζήτηση άρρητης γνώσης
Antipatterns
Web crawler
Tacit knowledge search

description: Αντικείμενο της παρούσας διπλωματικής εργασίας είναι η ανάπτυξη ενός εργαλείου αναζήτησης νέων αντιπροτύπων διοίκησης έργων λογισμικού, που υπάρχουν σε ρητή ή σε άρρητη μορφή στο διαδίκτυο. Σκοπός της διπλωματικής αυτής εργασίας, που αποτελεί κομμάτι μιας ευρύτερης έρευνας πάνω στα αντιπρότυπα της διοίκησης έργων λογισμικού, είναι η ανάπτυξη του εργαλείου Antipattern Crawler (ArC), ο οποίος αποτελεί ένα πρόγραμμα ανίχνευσης του διαδικτύου, που ανάλογα με το λεξιλόγιο που θα του δοθεί και την ιστοσελίδα την οποία θα έχει ως αφετηρία, “ταξιδεύει” στο διαδίκτυο και ελέγχει τις σελίδες επιστρέφοντας αυτές που πιθανόν να περιέχουν αντιπρότυπα σε αδήλωτη μορφή. Τα αντιπρότυπα που θα βρεθούν από τον Antipattern Crawler, προστίθενται στην συνέχεια στο Dense, μια διαδικτυακή πλατφόρμα που επιτρέπει στον χρήστη την αναζήτηση αντιπροτύπων που εμφανίζονται στο έργο που έχει να αντιμετωπίσει, εμπλουτίζοντας έτσι το περιεχόμενό του.
description: The subject of this thesis is the development of a search tool for software project management antipatterns, as well as discovering new antipatterns that only exist in tacit form online. The purpose of this thesis, which is part of a wider research on project management antipatterns, is the development of the Antipattern Crawler (ArC) tool, a web crawler, which based on the vocabulary that will be provided, and a website that will start on, browses the internet and returns the pages that are likely to contain antipatterns in tacit, undeclared form. The antipatterns that are found by the Antipattern Crawler are then added in Dense, a web application that allows the user to identify the potential antipattern that he may be facing in a project, ultimately enriching its content.
Investigation of sp carbon chain interaction with silver nanoparticles by Surface Enhanced Raman Scattering
Creators: name: Lucotti, A.
name: Casari, C. S.
name: Tommasini, M.
name: Bassi, A. Li
name: Fazzi, D.
name: Russo, V.
name: Del Zoppo, M.
name: Castiglioni, C.
name: Cataldo, F.
name: Bottani, C. E.
name: Zerbi, G.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Surface Enhanced Raman Spectroscopy (SERS) is exploited here to investigate the interaction of isolated sp carbon chains (polyynes) in a methanol solution with silver nanoparticles. Hydrogen-terminated polyynes show a strong interaction with silver colloids used as the SERS active medium revealing a chemical SERS effect. SERS spectra after mixing polyynes with silver colloids show a noticeable time evolution. Experimental results, supported by density functional theory (DFT) calculations of the Raman modes, allow us to investigate the behavior and stability of polyynes of different lengths and the overall sp conversion towards sp2 phase.
description: 19 pages, 7 figures, 1 tables
High-redshift SMBHs can grow from stellar-mass seeds via chaotic accretion
Creators: name: Zubovas, Kastytis
name: King, Andrew R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Extremely massive black holes, with masses $M_{\rm BH} > 10^9 M_\odot$, have been observed at ever higher redshifts. These results create ever tighter constraints on the formation and growth mechanisms of early black holes. Here we show that even the most extreme black hole known, Pōniuā'ena, can grow from a $10 M_\odot$ seed black hole via Eddington-limited luminous accretion, provided that accretion proceeds almost continuously, but is composed of a large number of episodes with individually-uncorrelated initial directions. This chaotic accretion scenario ensures that the growing black hole spins slowly, with the dimensionless spin parameter $a \lesssim 0.2$, so its radiative efficiency is also low, $ε\simeq 0.06$. If accretion is even partially aligned, with $20-40\%$ of accretion events happening in the same direction, the black hole spin and radiative efficiency are much higher, leading to significantly slower growth. We suggest that the chaotic accretion scenario can be completely falsified only if a $10^9 M_\odot$ black hole is discovered at $z \geq 9.1$, approximately $150$~Myr before Pōniuā'ena. The space density of extreme quasars suggests that only a very small fraction, roughly one in $4 \times 10^7$, of seed black holes need to encounter favourable growth conditions to produce the observed extreme quasars. Other seed black holes grow much less efficiently, mainly due to lower duty cycles, so are much more difficult to detect.
description: 8 pages, 3 figures, accepted for publication in MNRAS
Business Angels:
Creators: name: Παπαϊωάννου, Φωτεινή Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Άγγελοι Επενδύσεων
Νεοφυείς εταιρίες
Καινοτομία και επιχειρηματικότητα
Business Angels
Startups
Innovation and enterpreneurship

description: Στην παρούσα διπλωματική επιχειρείται μία συγκριτική ανάλυση των μορφών χρηματοδότησης νεοσύστατων εταιριών με επικέντρωση στο θεσμό των «Αγγέλων Επενδύσεων». Μελέτη σχετικών περιπτώσεων νεοφυών επιχειρήσεων στο στάδιο της σποράς ή εκκίνησης οι οποίες συγκέντρωσαν κεφάλαια από ιδιώτες επενδυτές ή δίκτυα «Αγγέλων Επενδύσεων» στη διεθνή σκηνή, αλλά και, στην Ελλάδα. Εξαγωγή συμπερασμάτων σχετικά με α) τους παράγοντες επιτυχίας ενός καινοτόμου προϊόντος ή νέας υπηρεσίας στην αγορά, β) τους όρους και προϋποθέσεις εδραίωσης και, αξιοποίησης του θεσμού των Αγγέλων Επενδύσεων στην Ελλάδα, όπως και, γ) τι θέμα θα μπορούσε να ερευνηθεί εκ βαθέων σε μια περαιτέρω έρευνα σχετικά με τη συγκεκριμένη μορφή χρηματοδότησης.
description: A comparative analysis of startups financing forms focusing on "Business Angels". Case studies related to financing startups in a phase of seed or early development and research for markets, which received funds from private investors or “Angels” networks, in the international arena, but also in Greece. Conclusions regarding to a) the success factors of an innovative new product or service in the market, b) the terms and conditions of consolidation and exploitation of the institution of “Business Angels” in Greece, as well as c) what topic could be explored in depth in further research on this form of financing.
Surface detonation in type Ia supernova explosions?
Creators: name: Roepke, F. K.
name: Woosley, S. E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We explore the evolution of thermonuclear supernova explosions when the progenitor white dwarf star ignites asymmetrically off-center. Several numerical simulations are carried out in two and three dimensions to test the consequences of different initial flame configurations such as spherical bubbles displaced from the center, more complex deformed configurations, and teardrop-shaped ignitions. The burning bubbles float towards the surface while releasing energy due to the nuclear reactions. If the energy release is too small to gravitationally unbind the star, the ash sweeps around it, once the burning bubble approaches the surface. Collisions in the fuel on the opposite side increase its temperature and density and may -- in some cases -- initiate a detonation wave which will then propagate inward burning the core of the star and leading to a strong explosion. However, for initial setups in two dimensions that seem realistic from pre-ignition evolution, as well as for all three-dimensional simulations the collimation of the surface material is found to be too weak to trigger a detonation.
description: 5 pages, 3 figures, in: Proceedings of the SciDAC 2006 Meeting, Denver June 25-26 2006, also available at http://herald.iop.org/jpcs46/m51/gbr//link/409
Ανασχεδίαση και υλοποίηση συστήματος διαχείρισης αντιπροτύπων έργων λογισμικού:
Creators: name: Μουστάκας, Ηλίας Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Αντιπρότυπα
Οντολογίες
Σημασιολογικός συλλογισμός
Antipatterns
Ontologies
Semantic Reasoning

description: Αντικείμενο της παρούσας διπλωματικής εργασίας, είναι η ανάπτυξη ενός εργαλείου αναζήτησης και διαχείρισης αντιπροτύπων διοίκησης έργων λογισμικού. Σκοπός της εργασίας αυτής, είναι αφενός η πραγματοποίηση μιας ευρύτερης έρευνας πάνω στα αντιπρότυπα της διοίκησης έργων λογισμικού, αφετέρου η ανάπτυξη του εργαλείου DENSE. Το εργαλείο αυτό είναι ένα πρόγραμμα αναζήτησης και διαχείρισης αντιπροτύπων, που είναι πιθανό να εμφανίζονται στο έργο που έχει να διεκπεραιώσει ένας χρήστης. Τα διαθέσιμα αντιπρότυπα που υπάρχουν στο DENSE, θα εμπλουτιστούν με άλλα, μέσω του εργαλείου Antipattern Crawler (ArC), ο οποίος αποτελεί ένα πρόγραμμα που ανιχνεύει αντιπρότυπα που υπάρχουν σε αδήλωτη μορφή στο διαδίκτυο.
description: The subject of this thesis is to develop a tool to identify and manage project management software anti-patterns. The purpose of this thesis, is firstly to conduct a research on project management antipatterns, as well as the development of the tool DENSE. This tool is an antipattern identification and management program, for anti-patterns that are likely to appear on the project to be carried out by a user. Available antipatterns that exist in DENSE, will be enriched with many more, via the tool Antipattern Crawler (ArC), which is a program that identifies anti-patterns in undeclared form, in the World Wide Web.
ALMA observations and modeling of the rotating outflow in Orion Source I
Creators: name: López-Vázquez, J. A.
name: Zapata, Luis A.
name: Lizano, Susana
name: Cantó, Jorge
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present $^{29}$SiO(J=8--7) $ν$=0, SiS (J=19--18) $ν$=0, and $^{28}$SiO (J=8--7) $ν$=1 molecular line archive observations made with the Atacama Large Millimeter/Submillimeter Array (ALMA) of the molecular outflow associated with Orion Source I. The observations show velocity asymmetries about the flow axis which are interpreted as outflow rotation. We find that the rotation velocity ($\sim$4--8 km s$^{-1}$) decreases with the vertical distance to the disk. In contrast, the cylindrical radius ($\sim$100--300 au), the expansion velocity ($\sim$2--15 km s$^{-1}$), and the axial velocity $v_{\rm z}$ ($\sim$-1--10 km s$^{-1}$) increase with the vertical distance. The mass estimated of the molecular outflow $\mathrm{M}_{\rm outflow}\sim$0.66--1.3 M$_\odot$. Given a kinematic time $\sim$130 yr, this implies a mass loss rate $\dot{\mathrm{M}}_{\rm outflow} \sim 5.1-10 \times 10^{-3}$ M$_\odot$ yr$^{-1}$. This massive outflow sets important contraints on disk wind models. We compare the observations with a model of a shell produced by the interaction between an anisotropic stellar wind and an Ulrich accretion flow that corresponds to a rotating molecular envelope in collapse. We find that the model cylindrical radii are consistent with the $^{29}$SiO(J=8--7) $ν$=0 data. The expansion velocities and the axial velocities of the model are similar the observed values, except close to the disk ($z\sim\pm$150 au) for the expansion velocity. Nevertheless, the rotation velocities of the model are a factor $\sim$3--10 lower than the observed values. We conclude that the Ulrich flow alone cannot explain the rotation observed and other possibilities should be explored, like the inclusion of the angular momentum of a disk wind.
Somatic variant calling benchmarking
Creators: name: Domazet, Milan
name: Mijalkovic, Sanja
name: Topalovic, Luka
name: Majic, Boris
Publisher: name: F1000 Research Limited
Year: 2019

description: The increased number of sequenced cancer genomes since the completion of the human genome project, and the importance of correctly identifying somatic mutations, which can influence treatment or prognosis, is driving forward the development of novel somatic variant calling tools (somatic callers). A lack of best practices algorithm for identifying somatic variants, however, requires constant testing, comparing, and benchmarking of these tools. The absence of a truth set further hinders the effort for the evaluation. By comparing widely used open source somatic callers, such as Strelka, VarDict, VarScan2, Seurat and LoFreq, through analysis of in-house generated synthetic data, we found complex dependencies of somatic caller parameters relative to coverage depth, allele frequency, variant type, and detection goals. Next, we normalized and filtered the output data such that it can be appropriately compared to the truth set. The acquired benchmarking results were automatically and efficiently structured and stored. All of the tools used for the analysis have been implemented in Common Workflow Language which makes them portable and reproducible.
title: Wildly ramified rigid G₂‐local systems
Creators: name: Jakob, Konstantin
Publisher: name: Wiley
Year: 2024

description: In earlier work of the author, rigid irregular connections with differential Galois group G₂ and whose slopes have numerator 1 were classified and new rigid connections were constructed. The same construction can be carried out for ℓ‐adic local systems in the setting of positive characteristic. In this article, we provide the results that are needed to obtain the classification of wildly ramified rigid G₂‐local systems whose slopes have numerator 1. The overall strategy of the classification is very similar but the methods needed to obtain some invariants differ.
Generalized Hawking-Page Phase Transition
Creators: name: Majumdar, Parthasarathi
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The issue of radiant spherical black holes being in stable thermal equilibrium with their radiation bath is reconsidered. Using a simple equilibrium statistical mechanical analysis incorporating Gaussian thermal fluctuations in a canonical ensemble of isolated horizons, the heat capacity is shown to diverge at a critical value of the classical mass of the isolated horizon, given (in Planckian units) by the {\it microcanonical} entropy calculated using Loop Quantum Gravity. The analysis reproduces the Hawking-Page phase transition discerned for anti-de Sitter black holes and generalizes it in the sense that nowhere is any classical metric made use of.
description: 9 Pages, Latex with 2 eps figures
Ανάλυση πτητικών και φαινολικών ενώσεων του μύκητα ΄Evernia Prunastri΄ (Oak Moss). Έλεγχος της αντιοξειδωτικής ικανότητας των συστατικών του, και της ικανότητάς τους να αναστέλλουν την ALR2 και LOX:
Creators: name: Αναστασιλάκης, Χρυσόστομος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Μύκητας Βελανιδιάς
Αέρια Χρωματογραφία-Φασματομετρία Μάζας
Βιολογικές δράσεις
Oak Moss (Evernia Prunastri)
GC-MS
Biological activities

description: Στην παρούσα διατριβή πραγματοποιήθηκε ανάλυση των πτητικών ενώσεων του μύκητα της βελανιδιάς με αέρια χρωματογραφία-φασματομετρία μάζης (GC-MS) με χρήση πολικής στήλης η οποία κατέδειξε την παρουσία πληθώρας πτητικών συστατικών ουσιών. Αναλύθηκε ποιοτικά το εκχύλισμα με διχλωρομεθάνιο του μύκητα, με τη λήψη φασμάτων πυρηνικού μαγνητικού συντονισμού και επιβεβαιώθηκε η έντονη παρουσία φαινολικών ενώσεων και δεψιδίων. Παράλληλα στην διατριβή αυτή διερευνήθηκε φυτοχημικά ο μύκητας και ελέγχθηκαν οι βιολογικές δράσεις των εκχυλισμάτων αυτού. Συγκεκριμένα η αντιοξειδωτική δράση του με την μέθοδο σάρωσης της ρίζας DPPH*, η ικανότητα αναστολής του ενζύμου αναγωγάση της αλδόζης και του ενζύμου λιποξυγονάση. Ο μήκυτας Evernia Prunastri εμφανίζει αξιοσημείωτη αντιοξειδωτική δράση ενώ η μελέτη της ικανότητας αναστολής των ενζύμων αναγωγάση της αλδόζης και λιποξυγονάσης κατέληξε σε ικανοποιητικότατα αποτελέσματα και ως εκ τούτου χρήζει περαιτέρω διερεύνησης για την απομόνωση και ταυτοποίηση περισσότερων ενώσεων του Ε. prunastri και μελέτη της ικανότητάς τους να αναστέλλουν τα ένζυμα αυτά.
description: In the present study were analyzed the volatile compounds of oak moss by gas chromatography –mass spectrometry (GC-MS) with the use of a polar column and discovered plurality of substances. Simultaneously oak moss extracts, were investigated phytochemically and for biological actions. Specifically we investigated the antioxidant action by DPPH* technique, the inhibition ability of E.prunastri to aldose anagogase enzyme and lipoxygenase enzyme. Also, it was investigated the dichloro methane oak moss extract, by NMR analysis and the phenolic and depsides compounds presence was confirmed once more. Oak moss (Evernia Prunastri) exhibits remarkable antioxidant action. Furthermore the investigation of enzymes (aldose anagogase and lipoxygenase) inhibition concluded in satisfactory results and therefore appeared the necessity for more efforts towards the isolation and identification of Evernia prunastri compounds and their ability to inhibit these enzymes
Lesbian transformations in dealing with heterosexism
Creators: name: Abrams, Eve
Publisher: name: University of British Columbia
Year: 2009

description: Using a grounded theory approach (Strauss & Corbin, 1990), I explored the strategies that eight lesbians used in dealing with heterosexism, or the belief that a heterosexual orientation is superior to a homosexual or bisexual one. Participants were between the ages of 25 and 40, and had reached a comfortable acceptance of their sexual identity. In a l l cases, the women's ways of responding to and counteracting heterosexism appear to have become more effective over time. Collaboration with the women enabled me to present three models of "lesbian transformations in dealing with heterosexism," each of which builds on features from the preceding one. In addition, the information offered by participants has illuminated the nature of heterosexism, its impact on lesbians' lives, and some of the factors that make the experience of heterosexist oppression different for individual lesbians. Finally, the interview material helped me to draw implications with regard to counselling lesbians and training counsellors.
Non-linear shallow water dynamics with odd viscosity
Creators: name: Monteiro, Gustavo M.
name: Ganeshan, Sriram
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: In this letter, we derive the Korteweg-de Vries (KdV) equation corresponding to the surface dynamics of a shallow depth ($h$) two-dimensional fluid with odd viscosity ($ν_o$) subject to gravity ($g$) in the long wavelength weakly nonlinear limit. In the long wavelength limit, the odd viscosity term plays the role of surface tension albeit with opposite signs for the right and left movers. We show that there exists two regimes with a sharp transition point within the applicability of the KdV dynamics, which we refer to as weak $(|ν_o|< \sqrt{gh^3}/6)$ and strong $(|ν_o|> \sqrt{gh^3}/6)$ parity-breaking regimes. While the `weak' parity breaking regime results in minor qualitative differences in the soliton amplitude and velocity between the right and left movers, the `strong' parity breaking regime on the contrary results in solitons of depression (negative amplitude) in one of the chiral sectors.
description: 6 pages, 4 figures, video abstract: https://www.youtube.com/watch?v=DgFZxyNmllQ&feature=youtu.be
Quintessence: a mini-review
Creators: name: Martin, Jerome
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Models where the accelerated expansion of our Universe is caused by a quintessence scalar field are reviewed. In the framework of high energy physics, the physical nature of this field is discussed and its interaction with ordinary matter is studied and explicitly calculated. It is shown that this coupling is generically too strong to be compatible with local tests of gravity. A possible way out, the chameleon effect, is also briefly investigated.
description: 14 pages, 3 figures, Proceedings of the 2007 International Symposium on Cosmology and Particle Astrophysics, November 13-15, Taipei, Taiwan, to be published in Modern Physics Lett. May 2008
Generation of entanglement and non-stationary states via competing coherent and incoherent bosonic hopping
Creators: name: Solanki, Parvinder
Publisher: name: Zenodo
Year: 2025

description: # 2025/01 Entanglement Generation and Non-Stationary States

This repository contains the codes associated with the work:

"Generation of Entanglement and Non-Stationary States via Competing Coherent and Incoherent Bosonic Hopping"

by Parvinder Solanki, Albert Cabot, Matteo Brunelli, Federico Carollo, Christoph Bruder, and Igor Lesanovsky.

Dependencies:

Python (Version 3.12.3)The following libraries and their respective versions are required:-QuTiP:  4.7.5  -NumPy: 1.26.4  - Matplotlib: 3.6.3  - SciPy: 1.11.4 

Julia (Version 1.10.5)

           - DiffEqBase: v6.155.1             -QuadGK: v2.11.1             - DiffEqCallbacks: v3.9.1             - OrdinaryDiffEq: v6.89.0             - LinearAlgebra             - Distributed  

Folder Structure: All the codes are contained the following directories:

1) `Correlations`- Contains the code for calculating entanglement, quantum discord, and classical discord.- Relevant figures: Fig. 3(a,c) (main text), Fig. S2, S3 (supplemental material).

2) `Eigenspectra`- Contains the code for computing the eigenspectra of the Liouville superoperator for different system sizes.- Relevant figures: Fig. 2(g-i) (main text).

3) `Mean-field_Dynamics`- Contains the code for generating data and plots related to the mean-field dynamics of the system.- Relevant figures: Fig. 2, Fig. 3(d) (main text), Fig. S1 (supplemental material).

4) `Exact_Dynamics`- Contains the code for evolving the master equation for different system sizes.- Relevant figures: Fig. 2(d-f) (main text).

5) `Spin_equivalent_model`- Contains the code for evolving the spin-equivalent model of the Bose-Hubbard model.- Includes both mean-field equations and exact time evolution of the master equation for different system sizes.

- Relevant figures: Fig. S4(a,b) (main text).

---For any questions or clarifications, please refer to the manuscript or contact the authors.
The Sun: Light Dark Matter and Sterile Neutrinos
Creators: name: Lopes, Ilídio
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Next-generation experiments allow for the possibility to testing the neutrino flavor oscillation model to very high levels of accuracy. Here, we explore the possibility that the dark matter in the current universe is made of two particles, a sterile neutrino and a very light dark matter particle. By using a 3+1 neutrino flavor oscillation model, we study how such a type of dark matter imprints the solar neutrino fluxes, spectra, and survival probabilities of electron neutrinos. The current solar neutrino measurements allow us to define an upper limit for the ratio of the mass of a light dark matter particle $m_ϕ$ and the Fermi constant $G_ϕ$, such that $G_ϕ/m_ϕ$ must be smaller than $10^{30}\; G_{\rm F}\; eV^{-1}$ to be in agreement with current solar neutrino data from the Borexino, Sudbury Neutrino Observatory, and Super-Kamiokande detectors. Moreover, for models with a very small Fermi constant, the amplitude of the time variability must be lower than $3\%$ to be consistent with current solar neutrino data. We also found that solar neutrino detectors like Darwin, able to measure neutrino fluxes in the low energy-range with high accuracy, will provide additional constraints to this class of models that complement the ones obtained from the current solar neutrino detectors.
description: 10 pages, 6 figures
BVI photometry of the very old open cluster Berkeley 17
Creators: name: Bragaglia, Angela
name: Tosi, Monica
name: Andreuzzi, Gloria
name: Marconi, Gianni
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have obtained BVI CCD imaging of Berkeley 17, an anticentre open cluster that competes with NGC 6791 as the oldest known open cluster. Using the synthetic colour magnitude diagrams (CMD) technique with three sets of evolutionary tracks we have determined that its age is 8.5 - 9.0 Gyr, it distance modulus is (m-M)_0 = 12.2, with a reddening of E(B-V) = 0.62 - 0.60. Differential reddening, if present, is at the 5 % level. All these values have been obtained using models with metallicity about half of solar (Z=0.008 or Z=0.01 depending on the stellar evolution tracks), which allows us to reproduce the features of the cluster CMD better than other metallicities. Finally, from the analysis of a nearby comparison field we think to have intercepted a portion of the disrupting Canis Major dwarf galaxy.
description: In press on MNRAS. Figs 1, 8, 9 at degraded resolution
A uniform data model for joint publication of minor language dictionaries
Creators: name: Haspelmath, Martin
Publisher: name: Zenodo
Year: 2016
Subjects: lexicography, data model, electronic dictionary

description: This paper proposes a data model for dictionaries of small languages that can be applied to any language and that allows publication of many different dictionaries in the same general framework, with identical search options and linking of entries via comparison meanings. Dictionaries of small languages are of great interest to linguistic scholarship, but publishing such dictionaries in a way that that permits easy use by linguists and speakers requires electronic publication in database form and a relatively uniform data structure
Observational evidence for solar wind proton heating by ion-scale turbulence
Creators: name: Zhao, G. Q.
name: Lin, Y.
name: Wang, X. Y.
name: Wu, D. J.
name: Feng, H. Q.
name: Liu, Q.
name: Zhao, A.
name: Li, H. B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Space Physics (physics.space-ph)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: Based on in-situ measurements by Wind spacecraft from 2005 to 2015, this letter reports for the first time a clearly scale-dependent connection between proton temperatures and the turbulence in the solar wind. A statistical analysis of proton-scale turbulence shows that increasing helicity magnitudes correspond to steeper magnetic energy spectra. In particular, there exists a positive power-law correlation (with a slope $\sim 0.4$) between the proton perpendicular temperature and the turbulent magnetic energy at scales $0.3 \lesssim kρ_p \lesssim 1$, with $k$ being the wavenumber and $ρ_p$ being the proton gyroradius. These findings present evidence of solar wind heating by the proton-scale turbulence. They also provide insight and observational constraint on the physics of turbulent dissipation in the solar wind.
description: 15 pages, 4 figures, accepted for publication in Geophysical Research Letters
Metal mixing by buoyant bubbles in galaxy clusters
Creators: name: Roediger, E.
name: Brueggen, M.
name: Rebusco, P.
name: Boehringer, H.
name: Churazov, E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Using a series of three-dimensional, hydrodynamic simulations on an adaptive grid, we have performed a systematic study on the effect of bubble-induced motions on metallicity profiles in clusters of galaxies. In particular, we have studied the dependence on the bubble size and position, the recurrence times of the bubbles, the way these bubbles are inflated and the underlying cluster profile. We find that in hydrostatic cluster models, the resulting metal distribution is very elongated along the direction of the bubbles. Anisotropies in the cluster or ambient motions are needed if the metal distribution is to be spherical. In order to parametrise the metal transport by bubbles, we compute effective diffusion coefficients. The diffusion coefficients inferred from our simple experiments lie at values of around $\sim 10^{29}$ cm$^2$s$^{-1}$ at a radius of 10 kpc. The runs modelled on the Perseus cluster yield diffusion coefficients that agree very well with those inferred from observations.
description: 17 pages, 12 figures. Accepted by MNRAS
Communal journeys : a phenomenological inquiry into the experience of living and working in L’Arche
Creators: name: Bazinet, Jean-Claude
Publisher: name: University of British Columbia
Year: 2009

description: In spite of the frequent usage of the word community to describe various groups and social networks in our society, the nature of the experience of community living has been largely unexplored. As a response to this lack of research , this inquiry attempted to answer the question of what community meant to six members of the residential communities of L'Arche, an international network of communities where people with and without disabilities live and work together. L'Arche was selected because it represents an extreme effort to establish a whole way of life based on communal values. The phenomenological research method incorporated twelve in-depth, open-ended interviews. Analysis of gathered information revealed six themes and 17 subthemes. The themes describe the participants' experiences of making a purposeful decision, adopting a communal way of life, deepening their spiritual and religious orientations, enhancing personal growth, facing personal limitations, and being involved in conflicts and disagreements. Each of these themes contains from one to four subthemes which are dynamically interdependent and revelatory of the complexity of the shared experience. The pattern described is a more complete picture of the meaning of the experience of living and working in L'Arche than previously available in the research literature.
KL to pi0 e+ e- and KL to pi0 mu+ mu- : A binary star on the stage of flavor physics
Creators: name: Mescia, Federico
name: Smith, Christopher
name: Trine, Stephanie
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A systematic analysis of New Physics impacts on the rare decays KL to pi0 l+ l- is performed. Thanks to their different sensitivities to flavor-changing local effective interactions, these two modes could provide valuable information on the nature of the possible New Physics at play. In particular, a combined measurement of both modes could disentangle scalar/pseudoscalar from vector or axial-vector contributions. For the latter, model-independent bounds are derived. Finally, the KL to pi0 mu+ mu- forward-backward CP-asymmetry is considered, and shown to give interesting complementary information.
description: 20 pages, 5 figures. Comments and references added, minor numerical changes, conclusion unchanged, to appear in JHEP
title: Choosing To Bear Arms: Resistance and Identity Formation Through Louisiana’s Free Afro Creole Militia
Creators: name: McFarlane, Victoria
Publisher: name: Old Dominion University
publisherIdentifier: https://ror.org/04zjtrb98
publisherIdentifierScheme: ROR
Year: 2024

description: This thesis examines how African and Afro Creole men utilized the availability of and demand for forced and voluntary militia service under French, Spanish, and American governance as a mode of resistance to discrimination and repression within the social structures of the region. The influence and connections built through militia service were engaged to protect and preserve rights, customs, and opportunities for the Afro Creole community. From the establishment of the Louisiana colony until the Civil War, African and Afro Creole men utilized the service required in defense of their new home to gain freedoms, expand their personal and community rights, and build networks with fellow active militia, veterans, and their families. Examining the usage of that service during each period of Louisiana colonial and antebellum history demonstrates the dominant influence that engagement in military service held within the community and how that shaped antebellum independence and activism that stood ready to step immediately into Reconstruction roles at local, state, and national levels. Regimes in Louisiana changed but the influence of Afro Creole militia service remained.
Neutrinoless double beta decay without Majorana neutrinos
Creators: name: Gu, Pei-Hong
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is firmly believed that a signal of neutrinoless double beta decay can unquestionably confirm the Majorana nature of neutrinos. However we notice that a Majorana neutrino mass induced after some neutrinoless double beta decay processes can be accidentally cancelled by another Majorana neutrino mass induced before any neutrinoless double beta decay processes. This realistic cancellation can simultaneously allow an observable neutrinoless double beta decay and a vanishing Majorana neutrino mass. In consequence a future discovery of neutrinoless double beta decay cannot fully rule out the possibility of Dirac neutrinos.
description: 4 pages, 5 figures
Machine Learning in Airline Crew Pairing to Construct Initial Clusters for Dynamic Constraint Aggregation
Creators: name: Yaakoubi, Yassine
name: Soumis, François
name: Lacoste-Julien, Simon
Publisher: name: arXiv
Year: 2020
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Optimization and Control (math.OC)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: The crew pairing problem (CPP) is generally modelled as a set partitioning problem where the flights have to be partitioned in pairings. A pairing is a sequence of flight legs separated by connection time and rest periods that starts and ends at the same base. Because of the extensive list of complex rules and regulations, determining whether a sequence of flights constitutes a feasible pairing can be quite difficult by itself, making CPP one of the hardest of the airline planning problems. In this paper, we first propose to improve the prototype Baseline solver of Desaulniers et al. (2020) by adding dynamic control strategies to obtain an efficient solver for large-scale CPPs: Commercial-GENCOL-DCA. These solvers are designed to aggregate the flights covering constraints to reduce the size of the problem. Then, we use machine learning (ML) to produce clusters of flights having a high probability of being performed consecutively by the same crew. The solver combines several advanced Operations Research techniques to assemble and modify these clusters, when necessary, to produce a good solution. We show, on monthly CPPs with up to 50 000 flights, that Commercial-GENCOL-DCA with clusters produced by ML-based heuristics outperforms Baseline fed by initial clusters that are pairings of a solution obtained by rolling horizon with GENCOL. The reduction of solution cost averages between 6.8% and 8.52%, which is mainly due to the reduction in the cost of global constraints between 69.79% and 78.11%.
description: First publication in the "Cahiers du GERAD" series in February 2020. Submitted to EURO Journal on Transportation and Logistics on January 17, 2020 and available online on September 2, 2020
The Solar Neighborhood. XLVI. Revealing New M Dwarf Binaries and their Orbital Architectures
Creators: name: Vrijmoet, Eliot Halley
name: Henry, Todd J.
name: Jao, Wei-Chun
name: Dieterich, Serge B.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: We use 20 years of astrometric data from the RECONS program on the CTIO/SMARTS 0.9-m to provide new insight into multiple star systems in the solar neighborhood. We provide new and updated parallaxes for 210 systems and derive nine high-quality astrometric orbits with periods of 2.49 - 16.63 years. Using a total of 542 systems' parallaxes from RECONS, we compare systems within 25 parsecs to Gaia DR2 to define criteria for selecting unresolved astrometric multiples from the DR2 results. We find that three out of four unresolved multi-star red dwarf systems within 25 pc in DR2 have parallax_error $\geq 0.32$ mas, astrometric_gof_al $\geq 56$, astrometric_excess_noise_sig $\geq 108.0$, ruwe $\geq 2.0$, and parallaxes more than $\sim$10% different than the long-term RECONS results. These criteria have broad applications to any work targeting nearby stars, from studies seeking binary systems to efforts targeting single stars for planet searches.
description: Accepted for publication in The Astronomical Journal. 23 pages, 7 figures, 3 tables. Contact corresponding author for full electronic tables
The Bazanski Approach in Brane Worlds: A Brief Introduction
Creators: name: Kahil, M. E.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Paths of test particles, rotating and charged objects in brane-worlds using a modified Bazanski Lagrangian are derived. We also discuss the transition to their corresponding equations in four dimensions. We then make a comparison between the given equations in brane-worlds (BW) and their analog in space-time-matter (STM) theory.
description: A paper presented at the Eleventh Meeting of Marcel Grossmann, held in Berlin, 23-29 July 2006
Magnetic-field symmetries of mesoscopic nonlinear conductance
Creators: name: Polianski, M. L.
name: Buttiker, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We examine contributions to the dc-current of mesoscopic samples which are non-linear in applied voltage. In the presence of a magnetic field, the current can be decomposed into components which are odd (antisymmetric) and even (symmetric) under flux reversal. For a two-terminal chaotic cavity, these components turn out to be very sensitive to the strength of the Coulomb interaction and the asymmetry of the contact conductances. For both two- and multi-terminal quantum dots we discuss correlations of current non-linearity in voltage measured at different magnetic fields and temperatures.
description: 9 pages, 4 figures
Switching induced by spin Hall effect in an in-plane magnetized ferromagnet with the easy axis parallel to the current
Creators: name: Taniguchi, Tomohiro
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Magnetization switching in a fine-structured ferromagnet of nanoscale by the spin-transfer torque excited via the spin Hall effect has attracted much attention because it enables us to manipulate the magnetization without directly applying current to the ferromagnet. However, the switching mechanism is still unclear in regard to the ferromagnet having an in-plane easy axis parallel to the current. Here, we develop an analytical theory of the magnetization switching in this type of ferromagnet, and reveal the threshold current formulas for a deterministic switching. It is clarified that the current should be in between a certain range determined by two threshold currents because the spin-transfer torque due to a large current outside the range brings the magnetization in an energetically unstable state, and causes magnetization precession around the hard axis.
description: 13 pages, 7 figures
Models of black hole disks with self-gravity and non-constant angular momentum.:
Creators: name: Βουρέλλης, Χρήστος Χαραλάμπους
Publisher: name: Aristotle University of Thessaloniki
Year: 2014
Subjects: Μελανές οπές
Δίσκοι προσαύξησης
Υπολογιστική σχετικότητα
Black holes
Accretion disks
Computational Relativity

description: Κατασκευάζουμε τα πρώτα αριθμητικά μοντέλα σχετικιστικών δίσκων προσαύξησης με ιδιοβαρύτητα γύρω από μελανές οπές, έχοντας μη-σταθερή ειδική στροφορμή. Τα μοντέλα είναι αξονικά συμμετρικά και στάσιμα και η ειδική στροφορμή αυξάνει προς τα έξω ως ένας νόμος δύναμης. Τα αποτελέσματα γενικεύουν προηγούμενες μελέτες, όπου είχε θεωρηθεί πως η ειδική στροφορμή είναι σταθερή ή όπου είχε αγνοηθεί η ιδιο-βαρύτητα του δίσκου. Η μη-σταθερή στροφορμή είναι γνωστό πως σταθεροποιεί το δίσκο έναντι της αστάθειας προς κατάρρευση, όταν αγνοήσει κανείς την ιδιοβαρύτητα του δίσκου. Για το λόγο αυτό, μας ενδιαφέρουν ιδιαίτερα τα μοντέλα που έχουν αρκετή μάζα και παρουσιάζουν ακμή στο εσωτερικό άκρο του δίσκου. Ως ένα πρώτο βήμα, μελετάμε την ύπαρξη μοντέλων ισορροπίας σε μια περιορισμένη περιοχή του χώρου των παραμέτρων και δείχνουμε πως μοντέλα μεγάλης μάζας με ιδιοβαρύτητα σχηματίζουν μια επιφάνεια η οποία παρουσιάζει αναδίπλωση ως προς τη μάζα.
description: We construct the first numerical models of general relativistic, self-gravitating accretion tori around black holes with a non-constant specific angular momentum distribution. The models are axisymmetric and stationary and the specific angular momentum increases outwards as a power law. This generalizes previous cases, where only constant specific angular momentum was considered or where the models were not self-gravitating. The non-constancy of specific angular momentum was shown to stabilize the disk against the axisymmetric runaway instability while self-gravity was neglected. We are thus particularly interested in models that are massive and form an inner cusp. As a first application, we study the existence of equilibrium models in a restricted region of the parameter space and show that self-gravitating massive tori lie on a different surface of equilibrium models, that features an overlap in mass.
Simulation of some quantum gates, with decoherence
Creators: name: Corato, V.
name: Silvestrini, P.
name: Gorlich, A.
name: Korcyl, P.
name: Wosiek, J.
name: Stodolsky, L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Other Condensed Matter (cond-mat.other)
subject: Computational Physics (physics.comp-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Methods and results for numerical simulations of one and two interacting rf-Squid systems suitable for adiabatic quantum gates are presented. These are based on high accuracy numerical solutions to the static and time dependent Schroedinger equation for the full Squid Hamiltonian in one and two variables. Among the points examined in the static analysis is the range of validity of the effective two-state or ``spin 1/2'' picture. A range of parameters is determined where the picture holds to good accuracy as the energy levels undergo gate manipulations. Some general points are presented concerning the relations between device parameters and ``good'' quantum mechanical state spaces. The time dependent simulations allow the examination of suitable conditions for adiabatic behavior, and permits the introduction of a random noise to simulate the effects of decoherence. A formula is derived and tested relating the random noise to the decoherence rate. Sensitivity to device and operating parameters for the logical gates NOT and CNOT are examined, with particular attention to values of the tunnel parameter beta slightly above one. It appears that with values of beta close to one, a quantum CNOT gate is possible even with rather short decoherence times. Many of the methods and results will apply to coupled double-potential well systems in general.
description: 26 pages, 15 figures, Some clarification added on decoherence treatment, many small errors corrected, symbols on some figures enlarged, refs added. No change in content
Gravitino and Axino SuperWIMPs
Creators: name: Cembranos, J. A. R.
name: Feng, Jonathan L.
name: Rajaraman, A.
name: Takayama, F.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Gravitinos and axinos produced in the late decays of other supersymmetric particles are well-motivated dark matter (DM) candidates, whose experimental evidences are very distinctive and different from other standard candidates, as thermal produced neutralinos in similar supersymmetric models. In particular, charged sleptons could appear stable because of the length of its lifetime. The direct production of such particles at both the Large Hadron Collider (LHC) and a future International Linear Collider (ILC) can give not only a clear signature of supersymmetry but also the first non-gravitational evidence of dark matter.
description: 4 pages, LaTeX, 1 figure, Updated references. To appear in Proceedings of SUSY06, the 14th International Conference on Supersymmetry and the Unification of Fundamental Interactions, UC Irvine, California, 12-17 June 2006