cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Phenomenology of Mirror Fermions in the Littlest Higgs Model with T-Parity
Creators: name: Freitas, A.
name: Wyler, D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Little Higgs models are an interesting alternative to explain electroweak symmetry breaking without fine-tuning. Supplemented with a discrete symmetry (T-parity) constraints from electroweak precision data are naturally evaded and also a viable dark matter candidate is obtained. T-parity implies the existence of new (mirror) fermions in addition to the heavy gauge bosons of the little Higgs models. In this paper we consider the effects of the mirror fermions on the phenomenology of the littlest Higgs model with T-parity at the LHC. We study the most promising production channels and decay chains for the new particles. We find that the mirror fermions have a large impact on the magnitude of signal rates and on the new physics signatures. Realistic background estimates are given.
description: 13 pp
The isomorphism conjecture in L-theory
Creators: name: Roushon, S. K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: K-Theory and Homology (math.KT)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 19G24, 19J25 (Primary) 55N91 (Secondary)

description: This is the first of three articles on the Fibered Isomorphism Conjecture of Farrell and Jones for L-theory. We apply the general techniques developed in [15] and [16] to the L-theory case of the conjecture and prove several results. Here we prove the conjecture, after inverting 2, for poly-free groups. In particular, it follows for braid groups. We also prove the conjecture for some classes of groups without inverting 2. In fact we consider a general class of groups satisfying certain conditions which includes the above groups and some other important classes of groups. We check that the properties we defined in [15] are satisfied in several instances of the conjecture.
description: 14 pages, AMSLATEX file, the title is revised. item 3 in theorem 1.3 is removed as the proof of this item was found incorrect
Βελτιστοποίηση της αναπαράστασης των διεργασιών του οριακού στρώματος σε αριθμητικό μοντέλο πρόγνωσης καιρού
Creators: name: Αθανασίου, Φωτεινή Ανδρέα
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Αριθμητική πρόγνωση καιρού
Παραμετροποιήσεις οριακού στρώματος
WRF
Weather Research and Forecasting Model
Numerical weather prediction
Boundary layer parametrizations

description: Η εκπόνηση της παρούσας μεταπτυχιακής διατριβής ειδίκευσης έχει ως σκοπό τη μελέτη της επίδρασης των παραμετροποιήσεων του ατμοσφαιρικού οριακού στρώματος σε μια προσομοίωση ενός επεισοδίου έντονης βροχόπτωσης στις 21 Μαϊου 2016, με εφαρμογή του σύγχρονου περιοχικού, μη υδροστατικού ατμοσφαιρικού μοντέλου WRF – ARW. Για τα πειράματα ευαισθησίας επιλέκτηκαν τρία σχήματα που περιγράφουν το ατμοσφαιρικό οριακό στρώμα. Η περιοχή μελέτης που επιλέχθηκε είναι αυτή των νομών Ημαθίας και Πέλλας, στη κεντρική Μακεδονία, εξαιτίας των ιδιαίτερων χαρακτηριστικών της ως προς το ανάγλυφο και τη γεωγραφία. Χρησιμοποιήθηκαν τρία διαφορετικά σχήματα του Ατμοσφαιρικού Οριακού Στρώματος (ΑΟΣ). Πραγματοποιήθηκαν τρεις αντίστοιχες προσομοιώσεις στις οποίες το σχήμα YSU (Yonsei University scheme) θεωρήθηκε ως προσομοίωση αναφοράς (control experiment), ενώ τα άλλα δύο σχήματα του ΑΟΣ, MYJ (Mellor – Yamada – Janjic) και MYNN2 (Mellor Yamada Nakanishi Niino επιπεδου 2,5), χρησιμοποιήθηκαν ως προσομοιώσεις ευαισθησίας (sensitivity experiments). Στη συνέχεια, γίνεται σύγκριση των αποτελεσμάτων των πειραμάτων ευαισθησίας και του πειράματος αναφοράς ως προς τη βροχόπτωση. Στο τέλος της έρευνας σχολιάζονται τα αποτελέσματα και εξάγονται συμπεράσματα για την επίδραση που έχει η επιλογή διαφορετικού σχήματος ΑΟΣ στην προσομοίωση ενός έντονου επεισοδίου βροχόπτωσης
description: The purpose of this master thesis is to study the effect of boundary layer parameters on a simulation of a severe precipitation event on May 21, 2016, with the application of the regional, non-hydrostatic WRF-ARW model. Three schemes describing the boundary layer were selected for sensitivity experiments. The chosen study area is that of the prefectures of Imathia and Pella, in central Macedonia, due to its distinct features in relief and geography. Three different schemes of the Boundary Layer (BL) were used. Three simulations were performed in which the Yonsei University scheme (YUS) was considered the control experiment, while the other two schemes of BL, MYJ (Mellor - Yamada - Janjic) and MYNN2 (Mellor Yamada Nakanishi Niino level 2,5), were used as sensitivity experiments. The results of the sensitivity experiments and the reference experiment with regard to precipitation are then compared. At the end of the survey, the results are commented and conclusions are drawn on the effect of choosing a different BL pattern in simulating a severe precipitation incident
Atom-by-atom extraction using scanning tunneling microscope tip-cluster interaction
Creators: name: Deshpande, A.
name: Yildirim, H.
name: Kara, A.
name: Acharya, D. P.
name: Vaughn, J.
name: Rahman, T. S.
name: Hla, S. -W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We investigate atomistic details of a single atom extraction process realized by using scanning tunneling microscope (STM) tip-cluster interaction on a Ag(111) surface at 6 K. Single atoms are extracted from a silver cluster one atom at a time using small tunneling biases less than 35 mV and a threshold tunneling resistance of 47 kOhm. A combination of total energy calculations and molecular dynamics simulations shows a lowering of the atom extraction barrier upon approaching the tip to the cluster. Thus, a mere tuning of the proximity between the tip and the cluster governs the extraction process and is sufficient to extract an atom. The atomically precise control and reproducibility of the process are demonstrated by repeatedly extracting single atoms from a silver cluster on an atom-by-atom basis.
Probing within the Bondi radius of the ultramassive black hole in NGC 1600
Creators: name: Runge, J.
name: Walker, S. A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present deep (250 ks) Chandra observations of the nearby galaxy group NGC 1600, which has at its centre an ultramassive black hole (17$\pm$1.5 billion M$_{\odot}$). The exceptionally large mass of the black hole coupled with its low redshift makes it one of only a handful of black holes for which spatially resolved temperature and density profiles can be obtained within the Bondi radius with the high spatial resolution of Chandra. We analyzed the hot gas properties within the Bondi accretion radius R$_B$=1.2" - 1.7"= 0.38 - 0.54 kpc. Within a $\sim\!3$ kpc radius, we find two temperature components with statistical significance. Both the single temperature and two temperature models show only a very slight rise in temperature towards the centre, and are consistent with being flat. This is in contrast with the expectation from Bondi accretion for a temperature profile which increases towards the centre, and appears to indicate that the dynamics of the gas are not being determined by the central black hole. The density profile follows a relatively shallow $ρ\propto~r^{-[0.61\pm0.13]}$ relationship within the Bondi radius, which suggests that the true accretion rate on to the black hole may be lower than the classical Bondi accretion rate.
description: 9 pages, 9 figures, Accepted for publication in MNRAS
Dust content of core-collapse supernova hosts
Creators: name: Melchior, A. -L.
name: Combes, F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study a small sample of z=0.1-0.6 core-collapse supernova (CCSN) host galaxies. Continuum observations at 250GHz have been performed with MAMBO at the IRAM-30m telescope. None of these sources has been detected and the error-weighted mean flux is 0.25+/-0.32 mJy. Upper limits on their dust masses are derived and the corresponding sample mean corresponds to 1.4 +/- 2.2 x 10^8 Msol. These results are comparable with previous submillimetre observations of SN-Ia hosts performed by Farrah et al. and by Clements et al. We conclude that CCSN hosts are not extreme at millimetre wavelengths, and as confirmed with the optical luminosities of a subset of our sample, they are typical of the local galaxy population.
description: 5 pages, 1 figure, accepted for publication in Astronomy and Astrophysics
QCD factorization for twist-three axial-vector parton quasidistributions
Creators: name: Braun, Vladimir M.
name: Ji, Yao
name: Vladimirov, Alexey
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The transverse component of the axial-vector correlation function of quark fields is a natural starting object for lattice calculations of twist-3 nucleon parton distribution functions. In this work we derive the corresponding factorization expression in terms of twist-2 and twist-3 collinear distributions to one-loop accuracy. The results are presented both in position space, as the factorization theorem for Ioffe-time distributions, and in momentum space, for the axial-vector quasi- and pseudodistributions.
description: 30 pages, 2 figures; v2: typos fixed, reference added matching published version
Topologically decoherence-protected qubits with trapped ions
Creators: name: Milman, Pérola
name: Maineult, Wilfried
name: Guibal, Samuel
name: Guidoni, Luca
name: Douçot, Benoît
name: Ioffe, Lev
name: Coudreau, Thomas
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: We show that trapped ions can be used to simulate a highly symmetrical Hamiltonian with eingenstates naturally protected against local sources of decoherence. This Hamiltonian involves long range coupling between particles and provides a more efficient protection than nearest neighbor models discussed in previous works. Our results open the perspective of experimentally realizing in controlled atomic systems, complex entangled states with decoherence times up to nine orders of magnitude longer than isolated quantum systems.
description: 4 pages
Dibattito su Storie di imprese
Creators: name: Neri, Massimo
name: Chiapparino, Francesco
name: Pencarelli, Tonino
name: Poma, Lucio
name: Cori, Enrico
name: Di Toma, Paolo
name: Rinaldini, Matteo
name: Scapolan, Annachiara
name: Masino, Giovanni
name: Maggi, Bruno
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: ING-IND/35 Ingegneria economico-gestionale
M-PSI/06 Psicologia del lavoro e delle organizzazioni
SECS-P/08 Economia e gestione delle imprese
SECS-P/10 Organizzazione aziendale
SECS-P/12 Storia economica
SPS/09 Sociologia dei processi economici e del lavoro

description: Storie di imprese (TAO Digital Library, 2010), dedicated to the organizational transformations of five enterprises (Fiat Auto, Finmeccanica, Ciba Specialty chemicals, Zurich, Poste Italiane) during the 2000-2010 decade, stimulated a wide debate. This publication, which collects the commentaries and discussions of three seminar that took place in different Universities with the participation of scholars from different disciplines, continues the reflection about the crucial question: How do enterprises change?
Fire!
Creators: name: Fruzsa, Krisztina
name: Kuznets, Roman
name: Schmid, Ulrich
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Logic in Computer Science (cs.LO)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: In this paper, we provide an epistemic analysis of a simple variant of the fundamental consistent broadcasting primitive for byzantine fault-tolerant asynchronous distributed systems. Our Firing Rebels with Relay (FRR) primitive enables agents with a local preference for acting/not acting to trigger an action (FIRE) at all correct agents, in an all-or-nothing fashion. By using the epistemic reasoning framework for byzantine multi-agent systems introduced in our TARK'19 paper, we develop the necessary and sufficient state of knowledge that needs to be acquired by the agents in order to FIRE. It involves eventual common hope (a modality related to belief), which we show to be attained already by achieving eventual mutual hope in the case of FRR. We also identify subtle variations of the necessary and sufficient state of knowledge for FRR for different assumptions on the local preferences.
description: In Proceedings TARK 2021, arXiv:2106.10886
The Chrysalis Opens? Photometry from the Eta Carinae HST Treasury Project, 2002-2006
Creators: name: Martin, J. C.
name: Davidson, Kris
name: Koppelman, M. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: During the past decade Eta Car has brightened markedly, possibly indicating a change of state. Here we summarize photometry gathered by the Hubble Space Telescope as part of the HST Treasury Project on this object. Our data include STIS/CCD acquisition images, ACS/HRC images in four filters, and synthetic photometry in flux-calibrated STIS spectra. The HST's spatial resolution allows us to examine the central star separate from the bright circumstellar ejecta. Its apparent brightness continued to increase briskly during 2002--06, especially after the mid-2003 spectroscopic event. If this trend continues, the central star will soon become brighter than its ejecta, quite different from the state that existed only a few years ago. One precedent may be the rapid change observed in 1938--1953. We conjecture that the star's mass-loss rate has been decreasing throughout the past century.
description: Accepted for publication in AJ. 31 pages including: 6 Figures and 5 Tables
Tabloids and Weighted Sums of Characters of Certain Modules of the Symmetric Groups
Creators: name: Numata, Yasuhide
Publisher: name: arXiv
Year: 2006
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 05E10, 20C30

description: We consider certain modules of the symmetric groups whose basis elements are called tabloids. Some of these modules are isomorphic to subspaces of the cohomology rings of subvarieties of flag varieties as modules of the symmetric groups. We give a combinatorial description for some weighted sums of their characters, i.e., we introduce combinatorial objects called $(ρ,\Ll)$-tabloids and rewrite weighted sums of characters as the numbers of these combinatorial objects. We also consider the meaning of these combinatorial objects, i.e., we construct a correspondence between $(ρ,\Ll)$-tabloids and tabloids whose images are eigenvectors of the action of an element of cycle type $ρ$ in quotient modules.
Unravelling cosmic velocity flows: a Helmholtz-Hodge decomposition algorithm for cosmological simulations
Creators: name: Vallés-Pérez, David
name: Planelles, Susana
name: Quilis, Vicent
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In the context of intra-cluster medium turbulence, it is essential to be able to split the turbulent velocity field in a compressive and a solenoidal component. We describe and implement a new method for this aim, i.e., performing a Helmholtz-Hodge decomposition, in multi-grid, multi-resolution descriptions, focusing on (but not being restricted to) the outputs of AMR cosmological simulations. The method is based on solving elliptic equations for a scalar and a vector potential, from which the compressive and the solenoidal velocity fields, respectively, are derived through differentiation. These equations are addressed using a combination of Fourier (for the base grid) and iterative (for the refinement grids) methods. We present several idealised tests for our implementation, reporting typical median errors in the order of $1\unicode{x2030}$-$1\%$, and with 95-percentile errors below a few percents. Additionally, we also apply the code to the outcomes of a cosmological simulation, achieving similar accuracy at all resolutions, even in the case of highly non-linear velocity fields. We finally take a closer look to the decomposition of the velocity field around a massive galaxy cluster.
description: 12 pages, 8 figures; accepted for publication in Computer Physics Communications
Best Management Practices for Firefighting in the Karstic Edwards (Balcones Fault Zone) Aquifer of South-Central Texas
Creators: name: Schindel, Geary M
name: Rosen, Rudolph A
Publisher: name: Texas Water Journal
Year: 2021

description: Karst aquifers are highly vulnerable to hazardous contaminants and pollution that can rapidly harm drinking water supplies. This paper presents tools and best management practices designed to enable first responders to protect karst watersheds and important aquifer drinking water supplies from potentially catastrophic hazardous and polluting materials that can enter the aquifer in water or other liquids runoff from firefighting and other response to emergencies, including ordinary accidental fire and fire caused by arson, terrorist attack, flood, high wind, lightening, and explosion in structures and along transportation corridors.
description: Texas Water Journal, Vol. 12 No. 1 (2021)
Reflections on statutory cohabitation law reform in Ireland: Past, present & future post-O'Meara? 1024 (October 2024/nonmarriage roundtable)
Creators: name: O'Sullivan, Kathryn
Publisher: name: University of Limerick
Year: 2024
Subjects: classificationCode: 48
subject: Law and legal studies

description: Part 15 of the Civil Partnership and Certain Rights and Obligations of Cohabitants Act 2010 governs the breakdown of cohabiting relationships in the Republic of Ireland. However, although the introduction of the statutory redress scheme under the 2010 Act was considered an important response to the growing need for the protection of vulnerable cohabitants, the extent to which it has provided such protection has remained somewhat obscure. This contribution reflects on what we know about the operation of the scheme as currently framed and questions what scope might exist for it to be gently reformed going forward.
Software Training in HEP
Creators: name: Malik, Sudhir
name: Meehan, Samuel
name: Lieret, Kilian
name: Evans, Meirin Oan
name: Villanueva, Michel H.
name: Katz, Daniel S.
name: Stewart, Graeme A.
name: Elmer, Peter
name: Aziz, Sizar
name: Bellis, Matthew
name: Bianchi, Riccardo Maria
name: Bianco, Gianluca
name: Bonilla, Johan Sebastian
name: Burger, Angela
name: Burzynski, Jackson
name: Chamont, David
name: Feickert, Matthew
name: Gadow, Philipp
name: Gruber, Bernhard Manfred
name: Guest, Daniel
name: Hageboeck, Stephan
name: Heinrich, Lukas
name: Horzela, Maximilian M.
name: Huwiler, Marc
name: Lange, Clemens
name: Lehmann, Konstantin
name: Li, Ke
name: Majumder, Devdatta
name: Mamužić, Judita
name: Nelson, Kevin
name: Newhouse, Robin
name: Nibigira, Emery
name: Norberg, Scarlet
name: Pineda, Arturo Sánchez
name: Proffitt, Mason
name: Regnery, Brendan
name: Roepe, Amber
name: Roiser, Stefan
name: Schreiner, Henry
name: Shadura, Oksana
name: Stark, Giordon
name: Swatman, Stephen Nicholas
name: Thais, Savannah
name: Valassi, Andrea
name: Wunsch, Stefan
name: Yakobovitch, David
name: Yuan, Siqi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Physics Education (physics.ed-ph)
subject: FOS: Physical sciences
subject: HEP, software, training

description: Long term sustainability of the high energy physics (HEP) research software ecosystem is essential for the field. With upgrades and new facilities coming online throughout the 2020s this will only become increasingly relevant throughout this decade. Meeting this sustainability challenge requires a workforce with a combination of HEP domain knowledge and advanced software skills. The required software skills fall into three broad groups. The first is fundamental and generic software engineering (e.g. Unix, version control,C++, continuous integration). The second is knowledge of domain specific HEP packages and practices (e.g., the ROOT data format and analysis framework). The third is more advanced knowledge involving more specialized techniques. These include parallel programming, machine learning and data science tools, and techniques to preserve software projects at all scales. This paper dis-cusses the collective software training program in HEP and its activities led by the HEP Software Foundation (HSF) and the Institute for Research and Innovation in Software in HEP (IRIS-HEP). The program equips participants with an array of software skills that serve as ingredients from which solutions to the computing challenges of HEP can be formed. Beyond serving the community by ensuring that members are able to pursue research goals, this program serves individuals by providing intellectual capital and transferable skills that are becoming increasingly important to careers in the realm of software and computing, whether inside or outside HEP
description: For CHEP 2021 conference,sent for publication to CSBS Springer
Μετρήσεις δυναμικών επιφανειακών τάσεων δυαδικών και τριαδικών μειγμάτων του μη ιονικού Synperonic PE/F68 με δεκατετρακυλοτριμεθυλοαμμώνιο βρωμίδιο και διδεκατετρακυλοδιμεθυλοαμμώνιο βρωμίδιο
Creators: name: Παπαδημητρίου, Μαρία Χαρισίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Επιφανειακή τάση
Τασενεργές ουσίες
Προσρόφηση
Surface tension
Surfactants
Adsorption

description: Ο σκοπός της παρούσας εργασίας ήταν η μελέτη της προσρόφησης μειγμάτων πολυμερούς – τασενεργών στη διεπιφάνεια αέρα- υδατικού διαλύματος. Μελετήθηκαν δυαδικά μείγματα του μη ιονικού πολυμερούς Synperonic PE/F68 με τις κατιονικές τασενεργές δεκατετρακυλοτριμεθυλοαμμώνιο βρωμίδιο (ΤΤΑΒ) και διδεκατετρακυλοδιμεθυλοαμμώνιο βρωμίδιο (diTDAB). Επίσης μελετήθηκαν τριαδικά μείγματα που περιείχαν και τις τρεις ουσίες. Η μέθοδος μέτρησης επιφανειακής τάσης που χρησιμοποιήθηκε ήταν του πλακιδίου Wilhelmy. Παρατηρήθηκαν φαινόμενα τόσο συνέργειας όσο και παρεμπόδισης με τον χρόνο. H ελάχιστη τιμή επιφανειακής τάσης που παρατηρήθηκε ήταν όση δίνει και το μεμονωμένο diTDAB. Σε συγκεντρώσεις κοντά στη cmc παρατηρήθηκε σχηματισμός συσσωματωμάτων. Το Synperonic ως πολύ υδρόφιλη ένωση, ελαχιστοποίησε τις ηλεκτροστατικές απώσεις μεταξύ των θετικά φορτισμένων κεφαλών των κατιονικών ουσιών. Οι σταθερές της προσρόφησης παρουσίασαν μείωση με την πάροδο του χρόνου. Τα αποτελέσματα συγκρίθηκαν με άλλων προηγούμενων μελετών που περιελάμβαναν μείγματα κατιονικών τασενεργών διπλής ανθρακικής αλυσίδας με Pluronic F68 ή/και υδροξυπροπυλομεθυλοκελλουλόζη (HPMC). Οι διαφορές αποδόθηκαν στην υψηλότερη υδροφιλικότητα του μορίου του Synperonic PE/F68
description: The aim of the present thesis was to study the adsorption kinetics of polymer-surfactant mixtures at the interface air - aqua solution. Were studied binary mixtures of the nonionic copolymer Synperonic PE/F68 with the cationic surfactants tetradecyltrimethylammonium bromide (TTAB) and ditetradecyldimethylammmonium bromide (di-TDAB). Were also studied ternary mixtures, containing all the three surfactants. The surface tension measurements made using Wilhelmy plate method. Synergy as well as time dependent hindrance effects, was observed. The minimum equilibrium surface tension that observed, was that obtained for single di-TDAB. At concentration below cmc, were formed clusters. Synperonic PE/F68, which is a very hydrophilic compound, minimized the electrostatic repulsion between the positively charged headgroups of the cationic surfactants. The adsorption constants continuously decreased with time. The results compared with previous ones, using binary mixtures of some double cationic surfactants with Pluronic F68 and/or hydroxypropylmethylcellulose (HPMC). The observed differences attributed to the higher hydrophilicity of Synperonic PE/F68
A Post-AGB Star in the Small Magellanic Cloud Observed with the Spitzer Infrared Spectrograph
Creators: name: Kraemer, Kathleen E.
name: Sloan, G. C.
name: Bernard-Salas, J.
name: Price, Stephan D.
name: Egan, Michael P.
name: Wood, P. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have observed an evolved star with a rare combination of spectral features, MSX SMC 029, in the Small Magellanic Cloud (SMC) using the low-resolution modules of the Infrared Spectrograph on the Spitzer Space Telescope. A cool dust continuum dominates the spectrum of MSX SMC 029. The spectrum also shows both emission from polycyclic aromatic hydrocarbons (PAHs) and absorption at 13.7 micron from C2H2, a juxtaposition seen in only two other sources, AFGL 2688 and IRAS 13416-6243, both post-asymptotic giant branch (AGB) objects. As in these sources, the PAH spectrum has the unusual trait that the peak emission in the 7-9 micron complex lies beyond 8.0 micron. In addition, the 8.6 micron feature has an intensity as strong as the C-C modes which normally peak between 7.7 and 7.9 micron. The relative flux of the feature at 11.3 micron to that at 8 micron suggests that the PAHs in MSX SMC 029 either have a low ionization fraction or are largely unprocessed. The 13-16 micron wavelength region shows strong absorption features similar to those observed in the post-AGB objects AFGL 618 and SMP LMC 11. This broad absorption may arise from the same molecules which have been identified in those sources: C2H2, C4H2, HC3N, and C6H6. The similarities between MSX SMC 029, AFGL 2688, and AFGL 618 lead us to conclude that MSX SMC 029 has evolved off the AGB in only the past few hundred years, making it the third post-AGB object identified in the SMC.
description: 4 figures, Fig. 4 color; to appear in the 20 November 2006 Astrophysical Journal Letters
Gamma-Rays from Dark Matter Mini-Spikes in M31
Creators: name: Fornasa, Mattia
name: Taoso, Marco
name: Bertone, Gianfranco
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The existence of a population of wandering Intermediate Mass Black Holes (IMBHs) is a generic prediction of scenarios that seek to explain the formation of Supermassive Black Holes in terms of growth from massive seeds. The growth of IMBHs may lead to the formation of DM overdensities called "mini-spikes", recently proposed as ideal targets for indirect DM searches. Current ground-based gamma-ray experiments, however, cannot search for these objects due to their limited field of view, and it might be challenging to discriminate mini-spikes in the Milky Way from the many astrophysical sources that GLAST is expected to observe. We show here that gamma-ray experiments can effectively search for IMBHs in the nearby Andromeda galaxy (also known as M31), where mini-spikes would appear as a distribution of point-sources, isotropically distributed in a \thickapprox 3^{\circ} circle around the galactic center. For a neutralino-like DM candidate with a mass m_χ=150 GeV, up to 20 sources would be detected with GLAST (at 5σ, in 2 months). With Air Cherenkov Telescopes such as MAGIC and VERITAS, up to 10 sources might be detected, provided that the mass of neutralino is in the TeV range or above.
description: 9 pages, 5 figures
Fry-bread recipe
Creators: name: Parker, Verdena
name: Campbell, Amy
name: Escamilla, Ramón
name: Newbold, Lindsey
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio file VP-101107-03: A recipe for making fry-bread, told in Hupa and English.
SN-driven mechanism of cusp-core transformation: an appraisal
Creators: name: Burger, Jan D.
name: Zavala, Jesús
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present and test an effective model for N -body simulations that aims at mimicking the impact of supernova (SN) feedback on the dark matter (DM) distribution of isolated halos hosting dwarf galaxies. Although the model is physically decoupled from the cosmological history of both the DM halo and the dwarf galaxy, it allows us to study the impact of different macroscopic parameters such as galaxy concentration, feedback energy and energy injection time in the process of SN-driven core formation in a physically clear way. Using our effective model in a suite of N-body simulations of an isolated halo with different SN feedback parameters, we find that whether or not a DM core forms is determined by the total amount of SN feedback energy that is transferred to the DM particles. At a fixed injected energy, the amount of transferred energy is bigger - and the size of the DM core is larger - the faster the energy injection occurs and the more compact the dwarf galaxy is. Analyzing the orbital evolution of kinematic tracers, we demonstrate that a core forms through SN feedback only if the energy injection is impulsive relative to the dynamical timescale of particles in the inner halo. However, there is no fundamental link between the total amount of injected energy and the injection rate. Consequently, the presence of signatures of impulsive changes of the gravitational potential is not a sufficient condition for dwarf-size halos to have cored density profiles.
description: 25 pages, 7 figures, to appear in the Astrophysical Journal (in press)
Are the Players in an Interactive Belief Model Meta-certain of the Model Itself?
Creators: name: Fukuda, Satoshi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Artificial Intelligence (cs.AI)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: In an interactive belief model, are the players "commonly meta-certain" of the model itself? This paper formalizes such implicit "common meta-certainty" assumption. To that end, the paper expands the objects of players' beliefs from events to functions defined on the underlying states. Then, the paper defines a player's belief-generating map: it associates, with each state, whether a player believes each event at that state. The paper formalizes what it means by: "a player is (meta-)certain of her own belief-generating map" or "the players are (meta-)certain of the profile of belief-generating maps (i.e., the model)." The paper shows: a player is (meta-)certain of her own belief-generating map if and only if her beliefs are introspective. The players are commonly (meta-)certain of the model if and only if, for any event which some player i believes at some state, it is common belief at the state that player i believes the event. This paper then asks whether the "common meta-certainty" assumption is needed for an epistemic characterization of game-theoretic solution concepts. The paper shows: if each player is logical and (meta-)certain of her own strategy and belief-generating map, then each player correctly believes her own rationality. Consequently, common belief in rationality alone leads to actions that survive iterated elimination of strictly dominated actions.
description: In Proceedings TARK 2021, arXiv:2106.10886
Rabies Preventive behaviors of dog owners in Nakhon Pathom Province of Thailand
Creators: name: Akai, Keiko
name: Jiraporn Chompikul
name: Cheerawit Rattanapan
Publisher: name: ASEAN Institute for Health Development, Mahidol University
Year: 2015
Subjects: Rabies,dog owners,preventive behavior,Thailand

description: 1, 13, JOURNAL OF PUBLIC HEALTH AND DEVELOPMENT
SU(2) lattice gauge theory on a quantum annealer
Creators: name: Rahman, Sarmed A
name: Lewis, Randy
name: Mendicelli, Emanuele
name: Powell, Sarah
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Lattice gauge theory is an essential tool for strongly interacting non-Abelian fields, such as those in quantum chromodynamics where lattice results have been of central importance for several decades. Recent studies suggest that quantum computers could extend the reach of lattice gauge theory in dramatic ways, but the usefulness of quantum annealing hardware for lattice gauge theory has not yet been explored. In this work, we implement SU(2) pure gauge theory on a quantum annealer for lattices comprising a few plaquettes in a row with a periodic boundary condition. These plaquettes are in two spatial dimensions and calculations use the Hamiltonian formulation where time is not discretized. Numerical results are obtained from calculations on D-Wave Advantage hardware for eigenvalues, eigenvectors, vacuum expectation values, and time evolution. The success of this initial exploration indicates that the quantum annealer might become a useful hardware platform for some aspects of lattice gauge theories.
description: 19 pages, 10 figures, updated to match the Physical Review D version
On the AU Mic debris disk: density profiles, grain properties and dust dynamics
Creators: name: Augereau, J. C.
name: Beust, H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present the first comprehensive analysis of the AU Mic debris disk properties since the system was discovered by Kalas et al. (2004), and we explore whether the dynamical model, successful to reproduce the Beta Pic brightness profile could apply to AU Mic. We calculate the surface density profile of the AU Mic disk by performing the inversion of the near-IR and visible scattered light brightness profiles measured by Liu (2004a) and Krist et al. (2005), respectively. We discuss the grain properties by analysing the blue color of the disk in the visible (Krist et al. 2005) and by fitting the disk spectral energy distribution. We show that irrespective of the mean scattering asymmetry factor of the grains, most of the emission arises from an asymmetric, collisionally-dominated region that peaks close to the surface brightness break around 35 AU. The elementary scatterers at visible wavelengths are found to be sub-micronic, but the inferred size distribution underestimates the amount of large grains, resulting in too low sub-millimeter emissions compared to the observations. From our inversion procedure, we find that the V- to H-band scattering cross sections ratio increases outside 40 AU, in line with the observed color gradient of the disk. We show that a standard, solar-like stellar wind generates a pressure force onto the dust particles that behaves much like a radiation pressure force. With an assumed Mdot ~ 300 Mdot_sun, the wind pressure overcomes the radiation pressure and this effect is enhanced by the stellar flares. This explains the similarity between the Beta Pic and AU Mic brightness profiles. In both cases, the color gradient beyond 120 AU for Beta Pic and 35 AU for AU Mic, is believed to be a direct consequence of the dust dynamics.
description: 17 pages, 11 figures. To appear in A&A
Η πυκνότητα των υλικών σε φαινόμενα Πλεύσης-Βύθισης: Καταγραφή των ιδεών μαθητών ΣΤ΄ Δημοτικού μέσω Τεχνολογιών Μάθησης
Creators: name: Παρασκευοπούλου, Μαρία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Ιδέες μαθητών
Φυσικές Επιστήμες (ΦΕ)
Πυκνότητα
Πλεύση
Βύθιση
Ψηφιακά Αντικείμενα
Ideas of students
Physics
Density
Floating
Sinking
Digital objects

description: Η παρούσα έρευνα επιχείρησε την καταγραφή των ιδεών των μαθητών της ΣΤ΄ Δημοτικού, σχετικά με την πυκνότητα των υλικών σε φαινόμενα πλεύσης-βύθισης μέσω Τεχνολογιών Μάθησης. Τριάντα μαθητές αλληλοεπίδρασαν με τα Ψηφιακά Αντικείμενα (ΨΑ) που δημιουργήθηκαν με το ανοιχτού κώδικα εργαλείο Η5P και μετακινήθηκαν στην ιστοσελίδα του WordPress. Τα ΨΑ που χρησιμοποιήθηκαν στην έρευνα κατέγραψαν τις απαντήσεις των μαθητών μέσω της ηχογράφηση της φωνής, της πολλαπλής επιλογής, της επιλογή σημείων και της δραστηριότητας «σύρε-άφησε». Τα αποτελέσματα της έρευνας έδειξαν πως οι ιδέες των μαθητών δεν διαφέρουν σημαντικά από τις ιδέες που έχουν καταγραφεί από την πρότερη βιβλιογραφία. Η συγκεκριμένη τεχνολογία ανίχνευσης των ιδεών προτείνεται για χρήση από τους εκπαιδευτικούς ως βοηθητικό εργαλείο κατά τη διδακτική πράξη. Ο εκπαιδευτικός κρίνεται αναγκαίο να εστιάζει στις ιδέες των μαθητών που δεν συνάδουν με την σχολική/επιστημονική άποψη, προκειμένου να είναι σε θέση να κατασκευάσει διδακτικά έργα που να προκαλούν στους μαθητές γνωστική σύγκρουση και αντικατάσταση των πρότερων γνώσεων με τις σχολικά/επιστημονικά αποδεκτές
description: This research has sought to capture the ideas of 6th Grade students in primary school about the density of materials in floating and sinking phenomena through learning technologies. Thirty students interacted with the Digital Objects created by the open-source H5P tool and moved to the website of WordPress. The Digital Objects which were used in the survey recorded students’ responses using the recording of voice, multiple choice tasks, “Find Multiple Hot spots’’ task and drag-left activity. The results of the survey showed that pupils' ideas are not significantly different from the previous literature. This technology is recommended for use by teachers as an aid in teaching practice. It is necessary for the teacher to focus on the ideas of pupils who are not in line with the school/scientific view, in order to be able to build teaching projects that prompt pupils cognitive conflict and replace prior knowledge with the school/scientific acceptable view
A new equivalence between singularity categories of commutative algebras
Creators: name: Kalck, Martin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Algebraic Geometry (math.AG)
subject: Commutative Algebra (math.AC)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 14J17, 18G65, 18G80

description: We construct a triangle equivalence between the singularity categories of two isolated cyclic quotient singularities of Krull dimensions two and three, respectively. This is the first example of a singular equivalence involving connected commutative algebras of odd and even Krull dimension. In combination with Orlov's localization result, this gives further singular equivalences between certain quasi-projective varieties of dimensions two and three, respectively.
description: 9 pages, final version, minor changes and improvements of the presentation, appendix discussing examples of group graded singular equivalences added, comments are always welcome!
Low-energy signatures of charge and spin fluctuations in Raman and optical spectra of the cuprates
Creators: name: Caprara, S.
name: Di Castro, C.
name: Enss, T.
name: Grilli, M.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We calculate the optical and Raman response within a phenomenological model of fermion quasiparticles coupled to nearly critical collective modes. We find that, whereas critical scaling properties might be masked in optical spectra due to charge conservation, distinct critical signatures of charge and spin fluctuations can be detected in Raman spectra exploiting specific symmetry properties. We compare our results with recent experiments on the cuprates.
description: 6 pages, 4 figures, Proceedings of the Conference SMEC 2007 - Study of Matter at Extreme Conditions, Miami 2007
Knowledge from Probability
Creators: name: Goodman, Jeremy
name: Salow, Bernhard
Publisher: name: arXiv
Year: 2021
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: We give a probabilistic analysis of inductive knowledge and belief and explore its predictions concerning knowledge about the future, about laws of nature, and about the values of inexactly measured quantities. The analysis combines a theory of knowledge and belief formulated in terms of relations of comparative normality with a probabilistic reduction of those relations. It predicts that only highly probable propositions are believed, and that many widely held principles of belief-revision fail.
description: In Proceedings TARK 2021, arXiv:2106.10886
On bi-hamiltonian structure of some integrable systems on so*(4)
Creators: name: Tsiganov, A. V.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We classify all the quadratic Poisson structures on $so^*(4)$ and $e^*(3)$, which have the same foliation by symplectic leaves as the canonical Lie-Poisson tensors. The separated variables for the some of the corresponding bi-integrable systems are constructed.
description: LaTeX with Amsfonts, 13 pages, corrected typos
Hupa language lesson
Creators: name: Parker, Verdena
name: Campbell, Amy
name: Escamilla, Ramón
name: Newbold, Lindsey
name: Spence, Justin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: hup

description: Audio files VP-101107-01 and VP-101107-02: Hupa language lesson focused on colors, household objects, 'give' with different classificatory stems, yes/no questions, and expressing degrees of certainty.
A compact piecewise-linear Voronoi diagram for convex sites in the plane, or, Simple paths in a complex world
Creators: name: McAllister, Michael
Publisher: name: University of British Columbia
Year: 2008

description: In the plane, the post-office problem, which asks for the closest site to a query site, and retraction motion planning, which asks for a one-dimensional retract of the free space of a robot, are both classically solved by computing a Voronoi diagram. When the sites are k disjoint convex sets, we give a compact representation of the Voronoi diagram, using 0(k) line segments, that is sufficient for logarithmic time post-office location queries and motion planning. If these sets are polygons with n total vertices given in standard representations, we compute this diagram optimally in 0(k log n) deterministic time for the Euclidean metric and in 0(k log n log m) deterministic time for the convex distance function defined by a convex m-gon.
The Stars of the HETDEX Survey. I. Radial Velocities and Metal-Poor Stars from Low-Resolution Stellar Spectra
Creators: name: Hawkins, Keith
name: Zeimann, Greg
name: Sneden, Chris
name: Cooper, Erin Mentuch
name: Gebhardt, Karl
name: Bond, Howard E.
name: Carrillo, Andreia
name: Casey, Caitlin M.
name: Castanheira, Barbara G.
name: Ciardullo, Robin
name: Davis, Dustin
name: Farrow, Daniel J.
name: Finkelstein, Steven L.
name: Hill, Gary J.
name: Kelz, Andreas
name: Liu, Chenxu
name: Shetrone, Matthew
name: Schneider, Donald P.
name: Starkenburg, Else
name: Steinmetz, Matthias
name: Wheeler, Craig
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is an unbiased, massively multiplexed spectroscopic survey, designed to measure the expansion history of the universe through low-resolution ($R\sim750$) spectra of Lyman-Alpha Emitters. In its search for these galaxies, HETDEX will also observe a few 10$^{5}$ stars. In this paper, we present the first stellar value-added catalog within the internal second data release of the HETDEX Survey (HDR2). The new catalog contains 120,571 low-resolution spectra for 98,736 unique stars between $10 < G < 22$ spread across the HETDEX footprint at relatively high ($b\sim60^\circ$) Galactic latitudes. With these spectra, we measure radial velocities (RVs) for $\sim$42,000 unique FGK-type stars in the catalog and show that the HETDEX spectra are sufficient to constrain these RVs with a 1$σ$ precision of 28.0 km/s and bias of 3.5 km/s with respect to the LAMOST surveys and 1$σ$ precision of 27.5 km/s and bias of 14.0 km/s compared to the SEGUE survey. Since these RVs are for faint ($G\geq16$) stars, they will be complementary to Gaia. Using t-Distributed Stochastic Neighbor Embedding (t-SNE), we also demonstrate that the HETDEX spectra can be used to determine a star's T${\rm{eff}}$, and log g and its [Fe/H]. With the t-SNE projection of the FGK-type stars with HETDEX spectra we also identify 416 new candidate metal-poor ([Fe/H] $< -1$~dex) stars for future study. These encouraging results illustrate the utility of future low-resolution stellar spectroscopic surveys.
description: 18 Pages, 11 Figures, 2 Tables. Accepted to ApJ
Zeeman splitting in ballistic hole quantum wires
Creators: name: Danneau, R.
name: Klochan, O.
name: Clarke, W. R.
name: Ho, L. H.
name: Micolich, A. P.
name: Simmons, M. Y.
name: Hamilton, A. R.
name: Pepper, M.
name: Ritchie, D. A.
name: Zuelicke, U.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We have studied the Zeeman splitting in ballistic hole quantum wires formed in a (311)A quantum well by surface gate confinement. Transport measurements clearly show lifting of the spin degeneracy and crossings of the subbands when an in-plane magnetic field B is applied parallel to the wire. When B is oriented perpendicular to the wire, no spin-splitting is discernible up to B = 8.8 T. The observed large Zeeman splitting anisotropy in our hole quantum wires demonstrates the importance of quantum-confinement for spin-splitting in nanostructures with strong spin-orbit coupling.
Colaboración legislativa de las mujeres y agendas polarizantes: la Ley de Paridad Política y el proyecto de Interrupción Voluntaria del Embarazo en el Congreso Argentino
Creators: name: Santamarina, Sofia
Publisher: name: figshare
Year: 2021
Subjects: Uncategorized

description: ¿Qué incentivos existen para la colaboración legislativa? En una organización jerárquica del Congreso como es el caso argentino, las mujeres se encuentran frente a múltiples desventajas formales e informales. Las restricciones partidarias que operan antes de ser electas se trasladan al parlamento. Aun así, las legisladoras buscan impulsar sus proyectos de ley para influir en el diseño de políticas públicas y representar a sus electorados, apelando a la colaboración legislativa. A partir del análisis del proceso legislativo de dos proyectos de ley —la ley de paridad política — Ley 27412 y el proyecto 230-D-2018 de Interrupción Voluntaria del Embarazo— y el uso de una definición amplia de colaboración legislativa, el trabajo da cuenta de los incentivos y obstáculos que tienen las legisladoras para colaborar. A las restricciones partidarias que impone el diseño del sistema electoral, se suma el tipo de agenda. De esta forma, la colaboración de las mujeres no siempre es proactiva, sino que cuando se trata de agendas polarizantes que dividen a las mujeres —en especial, por los electorados que representan—, existe colaboración reactiva para evitar la sanción de un proyecto. Este tipo de colaboración revierte o reduce los efectos positivos de las restricciones débiles sobre la colaboración entre las legisladoras.