cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Comparison between different methods of model selection in cosmology
Creators: name: Rezaei, Mehdi
name: Malekjani, Mohammad
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: There are several methods for model selection in cosmology which have at least two major goals, that of finding the correct model or predicting well. In this work we discuss through a study of well-known model selection methods like Akaike information criterion (AIC), Bayesian information criterion (BIC), deviance information criterion (DIC) and Bayesian evidence, how these different goals are pursued in each paradigm. We also apply another method for model selection which less seen in cosmological literature, the Cross-validation method. Using these methods we will compare two different scenarios in cosmology, $Λ$CDM model and dynamical dark energy. We show that each of the methods tends to different results in model selection. While BIC and Bayesian evidence overrule the dynamical dark energy scenarios with 2 or 3 extra degree of freedom, the DIC and cross-validation method prefer these dynamical models to $Λ$CDM model. Assuming the numerical results of different analysis and combining cosmological and statistical aspects of the subject, we propose cross-validation as an interesting method for model selection in cosmology that can lead to different results in comparison with usual methods of model selection.
description: 12 pages, 3 figures, PUBLISHED IN EPJP. arXiv admin note: text overlap with arXiv:1510.00547 by other authors
Substructure in Tidal Streams; Tributaries in the Anticenter Ring
Creators: name: Grillmair, C. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on the detection in Sloan Digital Sky Survey data of at least three, roughly parallel components in a 65 degree-long stellar stream complex previously identified with the Anticenter or Monoceros Ring. The three-stream complex varies in width from 4 to 6 degrees along its length and appears to be made up of two or more narrow substreams as well as a broader, diffuse component. The width and complexity of the stream indicate that the progenitor was likely a dwarf galaxy of significant size and mass. The stream is 8.9 kpc distant and is oriented almost perpendicularly to our line of sight. The visible portion of the stream does not pass near any known dwarf galaxies and a preliminary orbit does not point to any viable progenitor candidates. Orbits for the narrower substreams can be modeled with velocity offsets from the broad component of about 8 km/s. We suggest that the broad component is likely to be the remains of a dwarf galaxy, while the narrower streams constitute the remnants of dynamically distinct components which may have included a native population of globular clusters. While the color of the main sequence turn-off is not unlike that for the Monoceros Ring, neither the visible stream nor any reasonable projection of its orbit passes through Monoceros or Canis Major, and we conclude that this stream is probably unrelated to the overdensities found in these regions.
description: 11 pages, 4 figures, accepted for publication in ApJ Letters
Diffuse bands 9577 and 9633 -- relations to other interstellar features
Creators: name: Galazutdinov, G. A.
name: Valyavin, G.
name: Ikhsanov, N. R.
name: Krelowski, J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We study, for the first time, the relations of two strong diffuse bands (DIBs) at 9633 and 9577~Å, commonly attributed to C$_{60}^+$, to other interstellar features seen in optical and UV spectra including H{\sc i}, Ca{\sc i}, Fe{\sc ii}, Na{\sc i}, Ti{\sc ii}, CN, CH, CH$^+$, and C$_2$ and DIBs 5780, 5797, 6196, 6269, 6284, and 6614. We analyzed 62 lines of sight where the stellar contamination by Mg{\sc ii} was corrected or found negligible for DIB 9633. Equivalent widths of DIB 9577 were measured in 62 lines of sight. Poor mutual correlation between the strengths of the above features and the major diffuse bands (5780 and 5797) as well as with other DIBs (with some exceptions) were revealed. The considered DIBs are also poorly correlated with the features of neutral hydrogen, molecular carbon, and those of simple interstellar radicals. Perhaps this phenomenon can be explained if the diffuse band 9577 is an unresolved blend of two or more interstellar features. There are indications that 9633 and 9577 diffuse bands are stronger in $σ$-type clouds, i.e. these features resemble the behavior of reasonably broad DIBs, which are strong in the lines of sight where the UV flux from the very hot nearby stars plays an important role.
description: 22 pages, 20 figures
Thermodynamic properties of ε-Fe with thermal electronic excitation effects on vibrational spectra
Creators: name: Zhuang, Jingyi
name: Wang, Hongjin
name: Zhang, Qi
name: Wentzcovitch, Renata M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: The thermodynamic properties of hcp-iron (ε-Fe) are essential for investigating planetary cores' internal structure and dynamic properties. Despite their importance to planetary sciences, experimental investigations of ε-Fe at relevant conditions are still challenging. Therefore, ab initio calculations are crucial to elucidating the thermodynamic properties of this system. Here we use a free energy calculation scheme based on the phonon gas model compatible with temperature-dependent phonon frequencies. We investigate the effects of electronic thermal excitations, which introduces a temperature dependence on phonon frequencies, and the implication for the thermodynamic properties of ε-Fe at extreme pressure (P) and temperature (T) conditions. We disregard phonon-phonon interactions, i.e., anharmonicity and their effect on phonon frequencies. Nevertheless, the current scheme is also applicable to T-dependent anharmonic frequencies. We conclude that the impact of thermal electronic excitations on vibrational properties is not significant up to ~ 4,000 K at 200 GPa but should not be ignored at higher temperatures or pressures. However, the static free energy, Fst, must always include the effect of thermal excitation fully in a continuum of Ts. Our results for isentropic equations of state show good agreement with data from recent ramp compression experiments up to 1,400 GPa conducted at the National Ignition Facility (NIF).
description: 29 pages, 9 figures
CP Violation, Stability and Unitarity of the Two Higgs Doublet Model
Creators: name: Kaffas, Abdul Wahab El
name: Ogreid, Odd Magne
name: Osland, Per
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The Two-Higgs-Doublet Model is considered, in its CP-non-conserving version. It is shown quantitatively how vacuum stability and tree-level unitarity in the Higgs-Higgs-scattering sector constrain the parameter space of the model. In particular, at high values of tanbeta, the model violates unitarity, unless some of the Higgs bosons are heavy. In the regime of large CP violation in the neutral-Higgs-t-quark sector, which requires tanbeta lsim 1, the Yukawa coupling parameter space (determined by the neutral-Higgs-sector rotation matrix) is reasonably unconstrained. On the other hand, the corresponding neutral-Higgs-b-quark sector allows for large CP violation at tanbeta gg 1. However, here the model is more constrained: Significant CP violation is correlated with a considerable splitting among the two heavier Higgs bosons.
description: 9 pages, Contribution to "FANS2006", to be published in " Nonlinear Phenomena in Complex Systems"
Complex dynamics and configurational entropy of spatial optical solitons in nonlocal media
Creators: name: Conti, Claudio
name: Peccianti, Marco
name: Assanto, Gaetano
Publisher: name: arXiv
Year: 2006
Subjects: subject: Optics (physics.optics)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: Intense light propagating in a nonlinear medium can generate an ensemble of interacting filaments of light, or spatial solitons. Using nematic liquid crystals, we demonstrate that they undergo a collective behavior typical of complex systems, including the formation of clusters and sound-like vibrations, as well as the reduction of the configurational entropy, controlled by the degree of nonlocality of the medium.
description: 14 pages, 4 figures. Optics Letters, to be published
Η ενδοοικογενειακή βία ως κοινωνικό φαινόμενο, τα αίτια και η αντιμετώπισή της
Creators: name: Πέτκογλου, Φανή Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Ενδοοικογενειακή βία-Αίτια
Ενδοοικογενειακή βία-Αντιμετώπιση
Domestic violence-causes
Domestic violence-confrontation

description: Η ενδοοικογενειακή βία αποτελεί ένα χρόνιο και σύνθετο κοινωνικό φαινόμενο, το οποίο εμφανίζεται σε όλα τα κοινωνικά και οικονομικά στρώματα και περιλαμβάνει μια σειρά από διαφορετικής ποινικής βαρύτητας εγκληματικές συμπεριφορές σε βάρος μελών της οικογένειας, όπως τη λεκτική, τη σωματική, τη σεξουαλική και την ψυχολογική βία, ακόμα και την παραμέληση και την οικονομική εκμετάλλευση. Εξαιτίας της συνθετότητας του προβλήματος της ενδοοικογενειακής βίας, είναι δύσκολο να προσεγγιστεί αποκλειστικά και μόνον από μία θεωρητική κατεύθυνση. Η προσέγγισή της συνδέεται άμεσα με τους κοινωνικούς, πολιτισμικούς και πολιτικούς παράγοντες, που επικρατούν σε μία κοινωνία και υπαγορεύουν σε μεγάλο βαθμό τη συμπεριφορά των μελών της, συνεπώς, τα πολυπαραγοντικά μοντέλα ανάλυσης της ενδοοικογενειακής βίας αποτελούν την πληρέστερη θεωρητική προσέγγιση, διότι αποτυπώνουν την πολυπλοκότητα του φαινομένου.
description: Domestic violence is a chronic and complex social phenomenon, which occurs in all social layers and includes a number of different criminal behaviors against family members, such as verbal, physical, sexual and psychological violence, neglect and economic exploitation. As the problem of domestic violence is very complexed and includes a multitude of interactive factors, it is difficult to be explained exclusively by a theoretical approach . The approach is linked to social, cultural and political factors, which dictate the behavior of society members , therefore, the multivariate models concerning the analysis of domestic violence are the most comprehensive and correct theoretical approach as they imprint the complexity of the phenomenon.
Ο «λόγος» στην πρώτη περίοδο της νιτσεϊκης σκέψης : μεταφορά, θέσμιση, ερμηνεία
Creators: name: Μιχαλούδας, Αλέξιος Θεοδώρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Ερμηνεία και πραγματικότητα
Νιτσεϊκή σκέψη
Λόγος και θέσμιση
Interpretation and reality
Nietzschean thought
Logos and institution

description: Ο στόχος της διπλωματικής εργασίας είναι να μελετηθεί το ζήτημα της γνώσης και της γλώσσας στη νιτσεϊκή σκέψη και ειδικότερα στην πρώτη περίοδο του έργου του Γερμανού φιλοσόφου. Από την Γέννηση της Τραγωδίας μέχρι το Περί αλήθειας και ψεύδους υπό εξωηθική έννοια, παρακινούμενοι από ένα γνωσιολογικής υφής ενδιαφέρον, προσπαθούμε να δείξουμε την σύνδεση μεταξύ της εμπειρίας του πραγματικού και της ερμηνείας ως πράξη. Επιχειρούμε μια ανάγνωση της Γέννησης της Τραγωδίας επικεντρωνόμενοι στη διαφορά μεταξύ μουσικής και γλώσσας ως εκφραστικά μέσα και συνεχίζουμε με την μελέτη του Περί αλήθειας και ψεύδους, αναδεικνύοντας το ζήτημα της μεταφορικής διάστασης της γλώσσας και των αναγωγικών μηχανισμών της. Ο νιτσεϊκός προοπτικισμός ανατροφοδοτεί το ενδιαφέρον περί του ζητήματος της ερμηνείας, υπό ένα γνωσιολογικό πρίσμα, καθώς η πραγματικότητα ορίζεται ως μία «δυναμική» κατηγορία, αξιολογούμενη μέσω του συνόλου των πιθανών παραστάσεών της και όχι ως μία «στατική» - όχι δηλαδή ως η παθητική εμπειρία της κυριαρχίας του λόγου της αλήθειας. Ο προοπτικισμός υποστηρίζει την νιτσεϊκή υπόθεση πως το πραγματικό ανάγεται στο γίγνεσθαι της ερμηνείας. Υποστηρίζουμε πως η παραπάνω υπόθεση είναι ιδιαιτέρως σημαντική όχι μόνο για την κριτική ανάλυση του παραδείγματος του διαλεκτικού κοσμοειδώλου, μα πρωτίστως και σημαντικότερα, για την ίδια την νιτσεϊκή «φιλοσοφική ανθρωπολογία»
description: The aim of this academic paper is to present the basic points of the early nietzschean thought on knowledge and language. From The Birth of Tragedy to On Truth and Lie in Extra-Moral Sense, we proceed with a rather strict gnoseological interest, trying to highlight the intrinsic correlation between the the experienced reality and the act of interpretation. We read the Birth of Tragedy centering in on the difference between language and music and we pass to the On Truth and Lie in Extra-Moral Sense focusing on Nietzsche’s reflection on the metaphorical nature of language and its’ deductionistic mechanisms. The subject of nietzschean perspectivism brings forth the problem of interpretation, from a gnoseological point of view. The reality is conceived as a “dynamic” category, through the whole of possible interpretations, rather than a “static” one (defined by the fact of the dominance of just one “discourse”). Nietzsche’s perspectivism supports the hypothesis that reality manifests itself in the act of interpreting. We argue that the above hypothesis has important ramifications not only for a critical analysis of the dialectical worldview paradigm, but firstly and foremostly for the nietzschean “philosophical anthropology” itself.
Participatory evaluation of urban poor NGOs in Thailand
Creators: name: Pratt, James Holden
Publisher: name: University of British Columbia
Year: 2009

description: The global trends of rapid urbanization and increasing disparity between rich and poor have been particularly extreme in the case of Thailand. The benefits of Thailand’s spectacular economic growth have been unequally distributed. For many of the over one million slum dwellers of Bangkok this boom period has resulted in mass eviction. Recent evidence suggests that slum communities in regional cities are also facing a trend of increased eviction. This case study analyzes the work of the Human Settlement Foundation, a Thai nongovernmental organization (NGO) which supports the formation and development of community—based organizations as a means for enabling and empowering Thailand’s urban poor to solve their shelter problems. The study focuses on the role of program evaluation in strengthening NGO capacities. It analyzes the purposes, methods, levels of participation, strengths, and weaknesses of external and internal evaluation processes as they are applied to NGOs. The thesis links field evidence with recent literature about participatory program evaluation to identify opportunities and constraints which might arise with the introduction of more collaborative evaluation processes. Basic data sources include semi—structured interviews; participant observation; primary documents such as project proposals, progress reports, memoranda, and brochures; and secondary documents such as studies, reports, and newspaper articles. The study finds that both external and internal evaluation have limited potential for strengthening NGO capacities. It develops a hypothesis about how more broadly participatory collaborative evaluation would affect the following five NGO capacity variables: relations with funding agencies, management abilities, accountability to clients, relations with other NGOs, and relations with government.
Prism international
Creators: name: Prism International
Publisher: name: Vancouver : The Creative Writing Program of the University of British Columbia
Year: 2021

description: The following description is provided by the publisher:
 CONTENTS
 JUDGE'S ESSAY
 Sharan Dhaliwal 7 Memory
 FICTION
 Tara Stillions Whitehead 8 The Year of the Monster
 Christine Ottoni 45 Plastic
 Randy Magnuson 71 Which of the Following
 NON-FICTION
 Jonathan Wei 25 Dead Languages Or The What
 Tabitha Siklos 56 Half Scissor
 Rachel Lindley-Maycock 84 And Begin
 POETRY
 Cassandra J. Bruner 21 Aubade after Claude Cahun & Marcel Moore's Le Mystère d'Adam
 Austin Rodenbiker 23 Easy Metaphor
 Kelsey Andrews 24 Carina
 Savannah Pulfer 40 SOMETIMES I FORGET ENTIRE YEARS
 Curtis LeBlanc 41 My Brother, Free Willy, Paris 2013
 Ashtyn Walker 42 bethnal green
 Anders Villani 53 Smoke Alarm
 Amy Roa 54 Winged Insects
 Devin Guthrie 55 attack of the hemagoblins
 Bardia Sinaee 66 Only the truth
 Shane Book 67 Breakdancing
 Cynthia Dewi Oka 69 After the Funeral
 Peter Jickling 83 Laundromat
 Contributors 91
The Effects of Gender Inequality and Routine Activities on Stalking Victimization
Creators: name: Stratta, Stephanie
Publisher: name: Digital Repository at the University of Maryland
Year: 2018
Subjects: subject: Criminology
subject: FOS: Law

description: Stalking has been a growing concern in criminology over the past few decades. This area needs more theoretical development. Two important theoretical perspectives are gender inequality and routine activities theory. So far, these perspectives have not been combined in research. This study seeks to improve research on stalking by integrating these two theories. The purpose of this study is to determine the relationship that economic ability and routine activities have on a woman’s risk of being stalked, as well as whether economic ability and routine activities can predict whether a victim can successfully change their routine activities and prevent future stalking events. Although the primary focus of this study is female victims, a comparative analysis between male and female victims is also performed. The data used for this study are the 2006 National Crime Victimization Survey (NCVS) and its Supplemental Victimization Survey (SVS), which focuses on detailing aspects of respondents’ stalking victimizations.
HI column densities of z > 2 Swift gamma-ray bursts
Creators: name: Jakobsson, P.
name: Fynbo, J. P. U.
name: Ledoux, C.
name: Vreeswijk, P.
name: Kann, D. A.
name: Hjorth, J.
name: Priddey, R. S.
name: Tanvir, N. R.
name: Reichart, D.
name: Gorosabel, J.
name: Klose, S.
name: Watson, D.
name: Sollerman, J.
name: Fruchter, A. S.
name: Postigo, A. de Ugarte
name: Wiersema, K.
name: Björnsson, G.
name: Chapman, R.
name: Thöne, C. C.
name: Pedersen, K.
name: Jensen, B. L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Context: Before the launch of the Swift satellite, the majority of the gamma-ray burst (GRB) afterglows for which Ly-alpha was redshifted into the observable spectrum showed evidence for a damped Ly-alpha absorber. This small sample indicated that GRBs explode either in galaxies, or regions within them, having high neutral hydrogen column densities. Aims: To increase the spectroscopic sample of GRBs with z > 2 and hence establish the N(HI) distribution along GRB lines-of-sight. Methods: We have obtained six z > 2 GRB afterglow spectra and fitted the Ly-alpha absorption line in each case to determine N(HI). This has been complemented with 12 other Swift N(HI) values from the literature. Results: We show that the peak of the GRB N(HI) distribution is qualitatively consistent with a model where GRBs originate in Galactic-like molecular clouds. However, a systematic difference, in particular an excess of low column-density systems compared to the predictions, indicates that selection effects and conditions within the cloud (e.g. strong ionization) influence the observed N(HI) range. We also report the discovery of Ly-alpha emission from the GRB 060714 host, corresponding to a star-formation rate of approximately 0.8 M_Sun/year. Finally, we present accurate redshifts of the six bursts: z = 3.240 +/- 0.001 (GRB 050319), z = 2.198 +/- 0.002 (GRB 050922C), z = 3.221 +/- 0.001 (GRB 060526), z = 3.425 +/- 0.002 (GRB 060707), z = 2.711 +/- 0.001 (GRB 060714) and z = 3.686 +/- 0.002 (GRB 060906).
description: 5 pages, 3 figures. Accepted for publication in A&A Letters. Various changes to text after referee comments. GRB 060926 added to Fig 3
Stakeholder participation in IPBES: connecting local environmental work with global decision making
Creators: name: Krug, Cornelia B.
name: Sterling, Eleanor
name: Cadman, Timothy
name: Geschke, Jonas
name: Castro, Paula F. Drummond De
name: Schliep, Rainer
name: Isimemen Osemwegie
name: Muller-Karger, Frank E.
name: Tek Maraseni
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Ecology
subject: FOS: Biological sciences
subject: Cancer
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy

description: The Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services(IPBES) strengthens the science-policy interface by producing scientific assessments on biodiversity and ecosystem services to inform policy. IPBES fosters knowledge exchange across disciplines, between researchers and other knowledge holders, practitioners, societal actors and decision makers working at different geographic scales. A number of avenues for participation of stakeholders across the four functions if IPBES exist. Stakeholders come from diverse backgrounds, including Indigenous Peoples and local communities, businesses, and non-governmental organization. They represent multiple sources of information, data, knowledge, and perspectives on biodiversity. Stakeholder engagement in IPBES seeks to 1. communicate, disseminate, and implement the findings of IPBES products; 2. Develop guidelines for biodiversity conservation within member countries; and 3. create linkages between global policy and local actors – all key to the implementation of global agreements on biodiversity. This paper reflects on the role of stakeholders in the first work programme of IPBES (2014–2018). It provides an overview of IPBES processes and products relevant to stakeholders, examines the motivation of stakeholders to engage with IPBES, and explores reflections by the authors (all active participants on the platform) for improved stakeholder engagement and contributions to future work of the platform.
Generalized Wilczynski invariants for non-linear ordinary differential equations
Creators: name: Doubrov, Boris
Publisher: name: arXiv
Year: 2007
Subjects: subject: Differential Geometry (math.DG)
subject: Classical Analysis and ODEs (math.CA)
subject: FOS: Mathematics
subject: 34A26; 53B15

description: We show that classical Wilczynski--Se-ashi invariants of linear systems of ordinary differential equations are generalized in a natural way to contact invariants of non-linear ODEs. We explore geometric structures associated with equations that have vanishing generalized Wilczynski invariants and establish relationship of such equations with deformation theory of rational curves on complex algebraic surfaces.
description: 18 pages; corrected typos, added reference
Η Γαστρονομική δημοσιογραφία στο Διαδίκτυο
Creators: name: Γάσπαρη, Στυλιανή Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Γαστρονομικός λόγος-Δημοσιογραφία
Γαστρονιμικός λόγος-Διαδίκτυο
Gastronomic Speech-Journalism
Gastronomic Speech-Internet

description: Η παρούσα έρευνα έχει ως αντικείμενο της την αναλυτική διερεύνηση της ελληνικής γαστρονομικής δημοσιογραφίας στη διαδικτυακή εκδοχή της. Επιχειρήθηκε μια εκτενής μελέτη του γαστρονομικού λόγου με έμφαση στα food blogs που τα τελευταία χρόνια έχουν κατακλύσει το χώρο του Διαδικτύου. Προσπαθήσαμε να μελετήσουμε και να ερμηνεύσουμε αυτό το φαινόμενο που αναπτύσσεται συνεχώς, με οδηγό τη σχέση του πεδίου της γαστρονομίας με τον δημοσιογραφικό λόγο, αλλά και να συγκρίνουμε την έντυπη, τηλεοπτική και διαδικτυακή μορφή της δημοσιογραφίας φαγητού.
description: The aim of this study is to investigate and analyze the field of Greek gastronomic journalism speech. An extensive study of the critical gastronomic speech attended as well as of the food blogs that the recent years have dominated the Internet space. We tried to study and to interpret this phenomenon that is constantly developing having always as a guide the relationship between the gastronomy and the journalism speech. Furthermore, compare the print, televised and online form of food journalism.
Periodicity in the transient regime of exhaustive polling systems
Creators: name: MacPhee, I. M.
name: Menshikov, M. V.
name: Popov, S.
name: Volkov, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 60K25 (Primary) 90B22, 37E05 (Secondary)

description: We consider an exhaustive polling system with three nodes in its transient regime under a switching rule of generalized greedy type. We show that, for the system with Poisson arrivals and service times with finite second moment, the sequence of nodes visited by the server is eventually periodic almost surely. To do this, we construct a dynamical system, the triangle process, which we show has eventually periodic trajectories for almost all sets of parameters and in this case we show that the stochastic trajectories follow the deterministic ones a.s. We also show there are infinitely many sets of parameters where the triangle process has aperiodic trajectories and in such cases trajectories of the stochastic model are aperiodic with positive probability.
description: Published at http://dx.doi.org/10.1214/105051606000000376 in the Annals of Applied Probability (http://www.imstat.org/aap/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Βελτιωμένοι αλγόριθμοι για δύσκολα προβλήματα τύπου knapsack
Creators: name: Παπαδοπούλου, Αναστασία Χαραλάμπους
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Κρυπτογραφία
Πλέγμα
Πρόβλημα του γυλιού
Cryptography
Lattice
Knapsack Problem

description: Στην παρούσα εργασία παραθέτουμε δυο βελτιώσεις της μεθόδου Schnorr-Shevchenko (SS), με τις οποίες λύνουμε το πρόβλημα του knapsack, και είναι γρηγορότερες κατά μέσο όρο από την αρχική μέθοδο. Επιπλέον, εφαρμόζουμε μια παραλλαγή στην ίδια μέθοδο (SS) έτσι ώστε να βρούμε μικρές ακέραιες λύσεις σε γραμμικές διοφαντικές εξισώσεις αλλά και λύσεις μέσα σε ένα συγκεκριμένο διάστημα. Τέλος, παραθέτουμε ένα σύστημα ταυτοποίησης που βασίζεται στο πρόβλημα του compact knapsack.
description: In the present study we consider two variants of Schnorr-Shevchenko method (SS) for solving hard knapsack problems, which are in average faster than the SS method. Furthermore, we apply a variant of SS method to find small integer solutions on linear Diophantine equations and also find solutions in a specific interval. Finally, we provide an id-scheme based on the compact knapsack problem.
Susceptibility of a spinon Fermi surface coupled to a U(1) gauge field
Creators: name: Nave, Cody P.
name: Lee, Sung-Sik
name: Lee, Patrick A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the theory of a U(1) gauge field coupled to a spinon Fermi surface. Recently this model has been proposed as a possible description of the organic compound $κ-(BEDT-TTF)_2 Cu_2 (CN)_3$. We calculate the susceptibility of this system and in particular examine the effect of pairing of the underlying spin liquid. We show that this proposed theory is consistent with the observed susceptibility measurements.
description: 5 pages, 4 figures
Jordanian Twist Quantization of D=4 Lorentz and Poincare Algebras and D=3 Contraction Limit
Creators: name: Borowiec, A.
name: Lukierski, J.
name: Tolstoy, V. N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We describe in detail two-parameter nonstandard quantum deformation of D=4 Lorentz algebra $\mathfrak{o}(3,1)$, linked with Jordanian deformation of $\mathfrak{sl} (2;\mathbb{C})$. Using twist quantization technique we obtain the explicit formulae for the deformed coproducts and antipodes. Further extending the considered deformation to the D=4 Poincaré algebra we obtain a new Hopf-algebraic deformation of four-dimensional relativistic symmetries with dimensionless deformation parameter. Finally, we interpret $\mathfrak{o}(3,1)$ as the D=3 de-Sitter algebra and calculate the contraction limit $R\to\infty$ ($R$ -- de-Sitter radius) providing explicit Hopf algebra structure for the quantum deformation of the D=3 Poincaré algebra (with masslike deformation parameters), which is the two-parameter light-cone $κ$-deformation of the D=3 Poincaré symmetry.
description: 13 pages, no figures
Prism international
Creators: name: Prism International
Publisher: name: Vancouver : The Creative Writing Program of the University of British Columbia
Year: 2021

description: The following description is provided by the publisher:
 CONTENTS
 JUDGE'S ESSAY
 Katherena Vermette 7 So Many Individual Units of Love and Meaning, or Judging Poetry Contests is F*cking Hard
 SPRAWL
 Emma Cleary and Molly Cross-Blanchard 10 Letter from the Editors
 MAPS
 Angélique Lalonde 12 Lady with the big head chronicle
 Amy M. Alvarez 22 I Could Almost Mistake this Gold Peninsula for Gospel
 Caroline McDonald 23 Lancashire North West England
 24 Six Months in Preston
 Cassandra Blanchard 25 rubber
 Cooper Skjeie 26 back alley romance
 Carmella Gray-Cosgrove 28 The Dance of the Cygnets
 FLESH
 Becky Hagenston 37 A Great Fall
 a.m. kozak 39 you should message me if
 Cody Caetano 40 why the sex addict is a porkchop preteNDN
 Paola Ferrante 43 A Trick of the Dark
 Kate Wallace Fry 52 dyke seeks a non-euclidean utopia, or alternatively a femme top
 LANGUAGE
 Hari Alluri 55 Jungle, at Voltage
 Helen McClory 57 The Ethics of Sex Dreams
 Lou Garcia-Dolnik 65 what's your bodypolitik?
 Colleen Baran 67 The Spring of Grade Nine
 Benjamin Swett 68 VR
 FUTURES
 Jade Wallace 76 Phenomenology of Night
 Liz Worth 77 Not Everything at Once
 Grace Lau 79 Pedicure at Pinky's
 Shaelin Bishop 81 Wishbone
 Jade Wallace 92 Contretemps
 Contributors 93
A Formal Treatment of Generalized Preferential Attachment and its Empirical Validation
Creators: name: Herdagdelen, Amac
name: Aygun, Eser
name: Bingol, Haluk
Publisher: name: arXiv
Year: 2006
Subjects: subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computers and Society (cs.CY)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Generalized preferential attachment is defined as the tendency of a vertex to acquire new links in the future with respect to a particular vertex property. Understanding which properties influence link acquisition tendency (LAT) gives us a predictive power to estimate the future growth of network and insight about the actual dynamics governing the complex networks. In this study, we explore the effect of age and degree on LAT by analyzing data collected from a new complex-network growth dataset. We found that LAT and degree of a vertex are linearly correlated in accordance with previous studies. Interestingly, the relation between LAT and age of a vertex is found to be in conflict with the known models of network growth. We identified three different periods in the network's lifetime where the relation between age and LAT is strongly positive, almost stationary and negative correspondingly.
Topic Modeling Based Extractive Text Summarization
Creators: name: Issam, Kalliath Abdul Rasheed
name: Patel, Shivam
name: N, Subalalitha C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computation and Language (cs.CL)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: Text summarization is an approach for identifying important information present within text documents. This computational technique aims to generate shorter versions of the source text, by including only the relevant and salient information present within the source text. In this paper, we propose a novel method to summarize a text document by clustering its contents based on latent topics produced using topic modeling techniques and by generating extractive summaries for each of the identified text clusters. All extractive sub-summaries are later combined to generate a summary for any given source document. We utilize the lesser used and challenging WikiHow dataset in our approach to text summarization. This dataset is unlike the commonly used news datasets which are available for text summarization. The well-known news datasets present their most important information in the first few lines of their source texts, which make their summarization a lesser challenging task when compared to summarizing the WikiHow dataset. Contrary to these news datasets, the documents in the WikiHow dataset are written using a generalized approach and have lesser abstractedness and higher compression ratio, thus proposing a greater challenge to generate summaries. A lot of the current state-of-the-art text summarization techniques tend to eliminate important information present in source documents in the favor of brevity. Our proposed technique aims to capture all the varied information present in source documents. Although the dataset proved challenging, after performing extensive tests within our experimental setup, we have discovered that our model produces encouraging ROUGE results and summaries when compared to the other published extractive and abstractive text summarization models.
description: 10 pages, 13 figures, 3 tables
Normal Modes in Model Jammed Systems in Three Dimensions
Creators: name: Silbert, Leonardo E.
name: Liu, Andrea J.
name: Nagel, Sidney R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Vibrational spectra and normal modes of mechanically stable particle packings in three dimensions are analyzed over a range of compressions, from near the jamming transition, where the packings lose their rigidity, to far above it. At high frequency, the normal modes are localized at all compressions. At low frequency, the nature of the modes depends somewhat on compression. At large compressions, far from the transition, the lowest-frequency normal modes have some plane-wave character, though less than one would expect for a crystalline or isotropic solid. At low compressions near the jamming transition, the lowest-frequency modes are neither plane-wave-like nor localized. We characterize these differences, highlighting the unusual dispersion behavior that emerges for marginally jammed solids.
description: Under review at Phys. Rev. E. Lower resolution figures here
Incorporating geodiversity in ecosystem service decisions
Creators: name: Fox, Nathan
name: Graham, Laura J
name: Eigenbrod, Felix
name: Bullock, James M
name: Parks, Katherine E
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Molecular Biology
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 60506 Virology
subject: Computational Biology

description: Holistic conservation of ecosystem services (ES) requires a greater understanding of how the interactions of biotic and abiotic aspects of nature provide them. Currently, geodiversity, the diversity of geology, geomorphology, sediments and soils and hydrology, as well as the services that they provide in isolation of interactions with biotic nature – geosystem services (GS) – are overlooked in ES literature and frameworks. Here, we provide a series of three nested frameworks which together help to provide clarity for both the theoretical role of geodiversity in service production as well as the basis for real-world management strategies. First, we present the ‘Geodiversity Flower’, a framework that can be operationalised to provide clarity in terminology to decision-makers. Second, we present the ‘Geo-Eco Services Framework’, which establishes the difference between ES and GS. The final framework presented is the ‘Geo-Eco Services Cascade Model’, which builds upon the widely used ES cascade model by demonstrating how geodiversity interacts with biotic nature to simultaneously provide ES and GS. Providing a holistic model that integrates both biotic and abiotic nature alongside ES and GS allows for a greater understanding of the roles of abiotic and biotic nature to services and their associated benefits and values to people.
Tunneling into a Fractional Quantum Hall System and the Infrared Catastrophe
Creators: name: Patton, Kelly R.
name: Geller, Michael R.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We calculate the tunneling density of states of a two-dimensional interacting electron gas in a quantizing magnetic field. We show that the observed pseudogap in the density of states can be understood as the result of an infrared catastrophe in a noninteracting electron model. This catastrophe stems from the response of an electronic system to the potential produced by the abruptly added charge during a tunneling event. Our formalism can be applied at any filling factor without the use of Chern-Simons or composite fermion theory.
A gauge-invariant discrete analog of the Yang-Mills equations on a double complex
Creators: name: Sushch, Volodymyr
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mathematical Physics (math-ph)
subject: Numerical Analysis (math.NA)
subject: FOS: Physical sciences
subject: FOS: Mathematics
subject: 81T13; 39A12

description: An intrinsically defined gauge-invariant discrete model of the Yang-Mills equations on a combinatorial analog of $\Bbb{R}^4$ is constructed. We develop several algebraic structures on the matrix-valued cochains (discrete forms) that are analogs of objects in differential geometry. We define a combinatorial Hodge star operator based on the use of a double complex construction. Difference self-dual and anti-self-dual equations will be given. In the last section we discus the question of generalizing our constructions to the case of a 4-dimensional combinatorial sphere
description: LaTeX, 17 pages
Probabilistic Vehicle Reconstruction Using a Multi-Task CNN
Creators: name: Coenen, Max
name: Rottensteiner, Franz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: The retrieval of the 3D pose and shape of objects from images is an ill-posed problem. A common way to object reconstruction is to match entities such as keypoints, edges, or contours of a deformable 3D model, used as shape prior, to their corresponding entities inferred from the image. However, such approaches are highly sensitive to model initialisation, imprecise keypoint localisations and/or illumination conditions. In this paper, we present a probabilistic approach for shape-aware 3D vehicle reconstruction from stereo images that leverages the outputs of a novel multi-task CNN. Specifically, we train a CNN that outputs probability distributions for the vehicle's orientation and for both, vehicle keypoints and wireframe edges. Together with 3D stereo information we integrate the predicted distributions into a common probabilistic framework. We believe that the CNN-based detection of wireframe edges reduces the sensitivity to illumination conditions and object contrast and that using the raw probability maps instead of inferring keypoint positions reduces the sensitivity to keypoint localisation errors. We show that our method achieves state-of-the-art results, evaluating our method on the challenging KITTI benchmark and on our own new 'Stereo-Vehicle' dataset.
description: 2019 IEEE/CVF International Conference on Computer Vision Workshop (ICCVW)
Stable commutator length in subgroups of PL(I)
Creators: name: Calegari, Danny
Publisher: name: arXiv
Year: 2006
Subjects: subject: Group Theory (math.GR)
subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Let G be a subgroup of PL(I). Then the stable commutator length of every element of [G,G] is zero.
description: 6 pages; version 2 incorporates referee's comments
D2.2 State-of-the-art of Ride-sharing in Target EU Countries
Creators: name: Mitropoulos, Lambros
name: Kortsari, Annie
name: Sanchez Martin, Celestino
name: Rizzi, Giuseppe
Publisher: name: Zenodo
Year: 2020
Subjects: RIDE2RAIL
Transport
Shift2Rail
Multi-modal travel
Ride-sharing
Travel Service Providers

description: The deliverable has the objectives of analysing the state-of-the-art of existing ride-sharing systems operating around the world; review the legal frameworks relevant to ride-sharing in the European countries, in order for potential barriers of implementation to be identified; define ride-sharing users and identification of their characteristics. The deliverable employs several data sources: EU research projects on sharing-mobility from the EU database CORDIS and partners’ finalized and ongoing projects, which are relative to the scope of RIDE2RAIL; Published papers and reports on the current state of ride-sharing systems; Ride-sharing companies and services that operated or are still in operation. In total, 80 publications were identified as relevant, and 59 ride-sharing providers were recorded at a global level (i.e., no geographic limitations); these systems are described and analyzed. Finally, the deliverable identifies the characteristics of ride-sharing travellers and ride-sharing providers, focusing on the identification of motivations and constraints that users may face when using ride-sharing services. The objective is to use this information to identify current and potential ride-sharing Travel Service Providers (TSPs) and ride-sharing travellers, to be targeted within the context of RIDE2RAIL.
Nature’s contribution to adaptation: insights from examples of the transformation of social-ecological systems
Creators: name: Colloff, Matthew J
name: Wise, Russell M.
name: Palomo, Ignacio
name: Lavorel, Sandra
name: Pascual, Unai
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Ecology
subject: Sociology
subject: FOS: Sociology
subject: 69999 Biological Sciences not elsewhere classified
subject: 80699 Information Systems not elsewhere classified
subject: FOS: Computer and information sciences
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Science Policy

description: Transformation of social-ecological systems due to climate change requires, transformative adaptation responses. We propose the concept of nature’s contribution to adaptation (NCA; previously called adaptation services), to reveal properties of ecosystems that provide options for future livelihoods and adaptation to transformative change. Knowledge about the capacity of ecosystems to supply NCA can inform decisions by revealing options for adaptation. We analysed eight historical and contemporary case studies of transformative adaptation and found that the five cases with medium-high degree of adaptation and use of NCA showed evidence of participative learning and co-production of adaptation options, low values contestation, low power imbalances and well-developed governance arrangements. These variables indicated that communities engaged in adaptation had ownership and agency to change how they thought and acted to implement transformative adaptation. We found the use of NCAs enabled transformative adaptation by helping people overcome current decision constraints imposed by societal values, institutional rules, or knowledge deficits to create novel options and re-frame decision contexts. The NCA concept can be applied to (1) help resolve uncertainties about nature’s contributions to people under environmental change; (2) reveal ecosystem properties of value for adaptation, but which are marginalised in current, dominant knowledge frameworks and decision-making; (3) act as a ‘boundary object’ for participative learning and co-production of adaptation options. Thus, the NCA concept represents a pragmatic, optimistic approach for societal adaptation to ecosystem transformation, countering feelings of despair that accompany the acceptance of irreversible, unavoidable loss of current ecosystem states and associated nature’s contributions to people.
Ανάπτυξη πολυπρακτορικής εφαρμογής-παιχνιδιού για τη μελέτη της διαδικασίας λήψης αποφάσεων των χρηστών
Creators: name: Ζαχαριάδης, Αγγελος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2016
Subjects: Παιχνίδια υπολογιστή
Ευφυείς πράκτορες
Μοντέλα εμπιστοσύνης
Computer games
Intelligent agents
Trust models

description: Η ανάπτυξη και εδραίωση της τεχνολογικής εποχής των κοινωνικών δικτύων και των έξυπνων συσκευών και εφαρμογών έχει αλλάξει τον τρόπο που οι άνθρωποι αντιλαμβάνονται και δρουν στο περιβάλλον τους, εικονικό και πραγματικό. Σε αυτό το πλαίσιο, στόχος της παρούσας εργασίας ήταν η ανάπτυξη ενός πολυπρακτορικού παιχνιδιού με τίτλο «Escape the Prison», με το οποίο μελετάται η συμπεριφορά του ανθρώπου-παίκτη, όσον αφορά τη λήψη αποφάσεων που σχετίζονται με την εμπιστοσύνη που ο άνθρωπος-παίκτης επενδύει στους άλλους συμπαίκτες του (ευφυείς πράκτορες). Για το σκοπό αυτό, έχει γίνει χρήση του πολυπρακτορικού συστήματος JADE, όπου παρέχει υποστήριξη ενεργειών και λήψης αποφάσεων για τους πράκτορες υπό τη μορφή διαφόρων συμπεριφορών. Επίσης, για τη μελέτη της εμπιστοσύνης που αναπτύσσεται μεταξύ τους κατά τη διάρκεια του παιχνιδιού, έγινε χρήση και ενσωμάτωση μιας προτεινόμενης παραλλαγής του κεντρικού μοντέλου εμπιστοσύνης T–Rex, με την οποία οι πράκτορες αξιολογούνται με βάση τρία κριτήρια, που καθορίζονται από το σενάριο του παιχνιδιού. Για να εξεταστούν οι πράκτορες σύμφωνα με αυτά τα κριτήρια, αναπτύχθηκε ένας αριθμός πρακτόρων με διαφορετικό χαρακτήρα και συμπεριφορά. Στο παιχνίδι ανταγωνίζονται δύο ομάδες, μία μόνο με πράκτορες και μία υβριδική (πράκτορας/άνθρωπος), έτσι ώστε να μελετηθεί ποια ομάδα αναπτύσσει μεγαλύτερη εμπιστοσύνη, ποια αποδίδει καλύτερα, κατά πόσο ένας άνθρωπος βασίζεται στη δικιά του άποψη και με ποιο τρόπο εισακούει έναν ευφυή πράκτορα.
description: The development and consolidation of the technological era of social networks and smart devices and applications, has changed the way people perceive and interact in their environment, virtual and real. In this context, the aim of this study was to develop a multi-agent game called “Escape the Prison”, in which the behavior of human player studied, in taking decisions related to the trust that human player invests to the other teammates (intelligent agents). For this purpose, JADE multi-agent system has been used, which provides support of acting and decision making for agents in the form of various types of behaviours. Also, for the study of trust that is being developed between them during the game, a proposed variant of the central trust model T-Rex has been used and integrated, in which the agents are evaluated against three criteria, defined by the scenario of the game. In order to test the agents based on these criteria, a number of agents where developed with different character and behavior. In this game, two teams compete, one with agents only, and an hybrid one (agent / human), so as to study which team develops more trust, which perform better, whether a man is based on his own opinion and in which way he hears an intelligent agent.