cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Reflections on Obergefell and the Family-Recognition Framework's Continuing Value
Creators: name: Goldberg, Suzanne B.
Publisher: name: Columbia University
Year: 2016
Subjects: subject: Law
subject: FOS: Law
subject: Constitutional law
subject: Gay rights
subject: Same-sex marriage
subject: Domestic relations

description: Unlike a typical law review essay, I offer reflections here based largely on my own past work in LGBT rights advocacy. Together with related scholarship, I rely on these experiences to argue that the 'family recognition"framework underlying earlier advocacy has value going forward, even after the Supreme Court's ruling in favor of nationwide marriage equality.
Connectivity patterns in loop percolation I: the rationality phenomenon and constant term identities
Creators: name: Romik, Dan
Publisher: name: arXiv
Year: 2013
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60K35, 82B20, 82B23

description: Loop percolation, also known as the dense O(1) loop model, is a variant of critical bond percolation in the square lattice Z^2 whose graph structure consists of a disjoint union of cycles. We study its connectivity pattern, which is a random noncrossing matching associated with a loop percolation configuration. These connectivity patterns exhibit a striking rationality property whereby probabilities of naturally-occurring events are dyadic rational numbers or rational functions of a size parameter n, but the reasons for this are not completely understood. We prove the rationality phenomenon in a few cases and prove an explicit formula expressing the probabilities in the "cylindrical geometry" as coefficients in certain multivariate polynomials. This reduces the rationality problem in the general case to that of proving a family of conjectural constant term identities generalizing an identity due to Di Francesco and Zinn-Justin. Our results make use of, and extend, algebraic techniques related to the quantum Knizhnik-Zamolodchikov equation.
description: Slightly revised from original version; to appear in Communications in Mathematical Physics
Local spectroscopy of a gate-switchable moiré quantum anomalous Hall insulator
Creators: name: Zhang, Canxun
name: Zhu, Tiancong
name: Soejima, Tomohiro
name: Kahn, Salman
name: Watanabe, Kenji
name: Taniguchi, Takashi
name: Zettl, Alex
name: Wang, Feng
name: Zaletel, Michael P.
name: Crommie, Michael F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In recent years, correlated insulating states, unconventional superconductivity, and topologically non-trivial phases have all been observed in several moiré heterostructures. However, understanding of the physical mechanisms behind these phenomena is hampered by the lack of local electronic structure data. Here, we use scanning tunnelling microscopy and spectroscopy to demonstrate how the interplay between correlation, topology, and local atomic structure determines the behaviour of electron-doped twisted monolayer-bilayer graphene. Through gate- and magnetic field-dependent measurements, we observe local spectroscopic signatures indicating a quantum anomalous Hall insulating state with a total Chern number of $\pm 2$ at a doping level of three electrons per moiré unit cell. We show that the sign of the Chern number and associated magnetism can be electrostatically switched only over a limited range of twist angle and sample hetero-strain values. This results from a competition between the orbital magnetization of filled bulk bands and chiral edge states, which is sensitive to strain-induced distortions in the moiré superlattice.
description: Article 14 pages, 4 figures & Supplementary Information 13 pages, 9 figures
Analysis of Remote Synchronization in Complex Networks
Creators: name: Gambuzza, Lucia Valentina
name: Cardillo, Alessio
name: Fiasconaro, Alessandro
name: Fortuna, Luigi
name: Gómez-Gardeñes, Jesús
name: Frasca, Mattia
Publisher: name: arXiv
Year: 2013
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Adaptation and Self-Organizing Systems (nlin.AO)
subject: FOS: Physical sciences

description: A novel regime of synchronization, called remote synchronization, where the peripheral nodes form a phase synchronized cluster not including the hub, was recently observed in star motifs. We show the existence of a more general dynamical state of remote synchronization in arbitrary networks of coupled oscillators. This state is characterized by the synchronization of pairs of nodes that are not directly connected via a physical link or any sequence of synchronized nodes. This phenomenon is almost negligible in networks of phase oscillators as its underlying mechanism is the modulation of the amplitude of those intermediary nodes between the remotely synchronized units. Our findings thus show the ubiquity and robustness of these states and bridge the gap from their recent observation in simple toy graphs to complex networks.
description: 10 pages, 6 figures. Manuscript final version
title: Βελτιστοποίηση σχεδιασμού φωτοβολταϊκού συστήματος με χρήση παράλληλης επεξεργασίας
Creators: name: Παράβαλος Χαράλαμπος
Publisher: name: Technical University of Crete
Year: 2013

description: Μη διαθέσιμο
Wave Conversion, Decay and Heating in a Partially Ionized Two-Fluid Magneto-Atmosphere
Creators: name: Cally, Paul S
name: Gomez-Miguez, M. M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: A ray-theoretic phase space description of linear waves in a two-fluid (charges and neutrals) magnetized plasma is used to calculate analytic decay rates and mode transmission and conversion coefficients between fast and slow waves in two dimensions due to finite ion-neutral collision frequencies at arbitrary ionization fraction. This is relevant to partially ionized astrophysical plasmas, in particular solar and stellar atmospheres. The most important parameter governing collisional effects is the ratio of the wave frequency to the neutral-charges collision frequency, $ε=ω/ν_{nc}$, with secondary dependence on ionization fraction and wave attack angle. Comparison is made to the one-fluid magnetohydrodynamic (MHD) case, and it is found that acoustic-to-acoustic and magnetic-to-magnetic transmission through the Alfvén-acoustic equipartition layer is decreased by a term of $\mathcal{O}(ε^2)$ relative to one-fluid (infinite collision frequency), and correspondingly acoustic-to-magnetic and magnetic-to-acoustic conversion is increased. The neutral acoustic mode is shown to dissipate rapidly as $ν_{nc}\to\infty$. Away from the mode conversion region, dissipative decay along the remaining magneto-acoustic rays scales as $\mathcal{O}(ε)$ and is found to be much more effective on magnetically dominated rays compared to acoustically dominated rays. This produces a steep jump in dissipation in mode conversion regions, where the rays change character, and can produce localized heating there and beyond. Applications to the solar chromosphere are discussed.
description: 23 pages, 8 figures, accepted for publication in Astrophys. J. Typo in Eq (8) in previous version corrected
Stochastic entropy production: Fluctuation relation and irreversibility mitigation in non-unital quantum dynamics
Creators: name: Fiorelli, Eliana
name: Gherardini, Stefano
name: Marcantoni, Stefano
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: In this work, we study the stochastic entropy production in open quantum systems whose time evolution is described by a class of non-unital quantum maps. In particular, as in [Phys. Rev. E 92, 032129 (2015)], we consider Kraus operators that can be related to a nonequilibrium potential. This class accounts for both thermalization and equilibration to a non-thermal state. Unlike unital quantum maps, non-unitality is responsible for an unbalance of the forward and backward dynamics of the open quantum system under scrutiny. Here, concentrating on observables that commute with the invariant state of the evolution, we show how the non-equilibrium potential enters the statistics of the stochastic entropy production. In particular, we prove a fluctuation relation for the latter and we find a convenient way of expressing its average solely in terms of relative entropies. Then, the theoretical results are applied to the thermalization of a qubit with non-Markovian transient, and the phenomenon of irreversibility mitigation, introduced in [Phys. Rev. Research 2, 033250 (2020)], is analyzed in this context.
description: 17 pages, v2 close to published version
Blow-up scenarios for 3D NSE exhibiting sub-criticality with respect to the scaling of one-dimensional local sparseness
Creators: name: Bradshaw, Zachary
name: Grujic, Zoran
Publisher: name: arXiv
Year: 2013
Subjects: subject: Analysis of PDEs (math.AP)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: It is shown that, if the vorticity magnitude associated with a (presumed singular) three-dimensional incompressible Navier-Stokes flow blows-up in a manner exhibiting certain {\em time dependent local structure}, then {\em time independent} estimates on the $L^1$ norm of $|ω|\log\sqrt{1+ |ω|^2}$ follow. The implication is that the volume of the region of high vorticity decays at a rate of greater order than a rate connected to the critical scaling of one-dimensional local sparseness and, consequently, the solution becomes sub-critical.
description: final version, to appear in J. Math. Fluid Mech., 13pp
title: Πρόβλεψη παραγωγής φωτοβολταϊκού πλαισίου με χρήση τεχνιτών νευρωνικών δικτύων
Creators: name: Μιχελογιαννάκης Θεοχάρης
Publisher: name: Technical University of Crete
Year: 2013

description: Μη διαθέσιμο
Marriage as Monopoly: History, Tradition, Incrementalism, and the Marriage/Civil Union Distinction
Creators: name: Goldberg, Suzanne B.
Publisher: name: Columbia University
Year: 2009
Subjects: subject: Law
subject: FOS: Law
subject: Constitutional law
subject: Same-sex marriage
subject: Civil unions
subject: Equality

description: History and tradition have taken a prominent place as favored rationales for the exclusion of same-sex couples from marriage. Incrementalism likewise has been invoked to suggest that states can permissibly move “one step at a time” to redress the unequal status of same-sex couples, including by creating a civil union/marriage regime instead of providing marriage for all. Yet constitutional jurisprudence is clear that neither longevity nor tradition alone can justify the continuation of a discriminatory rule. This Article asks, then, what work these rationales perform in the marriage/civil union jurisprudence and debate, given their inadequacy from a doctrinal standpoint. The central claim here is that governments invoke history and tradition to suggest that private actors, rather than the state, are responsible for marriage having a higher social status than civil unions. Yet this premise ignores the state’s monopoly over marriage and, therefore, over marriage’s socially valuable connotations. Consequently, even if private actors contribute to marriage’s special social value, state control over access to that value falls well within standard understandings of state action. Context-sensitive skepticism is similarly necessary toward state claims that unequal treatment should be sustained so long as the inequality is characterized as an incremental step in the direction of full equality.
Well-posedness of the shooting algorithm for control-affine problems with a scalar state constraint
Creators: name: Aronna, M. S.
name: Bonnans, F.
name: Goh, B. S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 49K30, 49M25, 65K99

description: We deal with a control-affine problem with scalar control subject to bounds, a scalar state constraint and endpoint constraints of equality type. For the numerical solution of this problem, we propose a shooting algorithm and provide a sufficient condition for its local convergence. We exhibit an example that illustrates the theory.
description: arXiv admin note: substantial text overlap with arXiv:1411.1719
title: Μελέτη απόδοσης φωτοβολταϊκών στοιχείων υψηλής συγκέντρωσης
Creators: name: Σεληνιωτάκη Καλλιόπη
Publisher: name: Technical University of Crete
Year: 2013

description: Μη διαθέσιμο
Optimal optical Ferris wheel solitons in a nonlocal Rydberg medium
Creators: name: Qiu, Jia-Bin
name: Qin, Lu
name: Zhao, Xing-Dong
name: Qian, Jing
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We propose a scheme for the creation of stable optical Ferris wheel(OFW) solitons in a nonlocal Rydberg electromagnetically induced transparency(EIT) medium. Depending on a careful optimization to both the atomic density and the one-photon detuning, we obtain an appropriate nonlocal potential provided by the strong interatomic interaction in Rydberg states which can perfectly compensate for the diffraction of the probe OFW field. Numerical results show that the fidelity keeps larger than 0.96 while the propagation distance has exceeded 160 diffraction lengths. Higher-order OFW solitons with arbitrary winding numbers are also discussed. Our study provides a straightforward route to generate spatial optical solitons in the nonlocal response region of cold Rydberg gases.
description: Optics Letters in press
Samuel Muindi Ezekiels' Spirit Motif in the Context of African Pentecostal Theology
Creators: name: Omondi, Francis
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 500401
subject: Christian studies

description: I was fascinated reading Samuel Muindi's book, Ezekiels' Spirit Motif in the Context of African Pentecostal Theology published in 2024. A book that, I thought, scholars with a keen interest in African theology should be aware of, critique, appreciate and dialogue to improve the knowledge of Christianity in our context. Hence this review.
A general basis set algorithm for galactic haloes and discs
Creators: name: Lilley, E. J.
name: van de Ven, G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present a unified approach to (bi-)orthogonal basis sets for gravitating systems. Central to our discussion is the notion of mutual gravitational energy, which gives rise to the self-energy inner product on mass densities. We consider a first-order differential operator that is self-adjoint with respect to this inner product, and prove a general theorem that gives the conditions under which a (bi-)orthogonal basis set arises by repeated application of this differential operator. We then show that these conditions are fulfilled by all the families of analytical basis sets with infinite extent that have been discovered to date. The new theoretical framework turns out to be closely connected to Fourier-Mellin transforms, and it is a powerful tool for constructing general basis sets. We demonstrate this by deriving a basis set for the isochrone model and demonstrating its numerical reliability by reproducing a known result concerning unstable radial modes.
description: to be published in Astronomy & Astrophysics
Optimum laser intensity for the production of energetic deuterium ions from laser-cluster interaction
Creators: name: Bang, W.
name: Dyer, G.
name: Quevedo, H. J.
name: Bernstein, A. C.
name: Gaul, E.
name: Rougk, J.
name: Aymond, F.
name: Donovan, M. E.
name: Ditmire, T.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: FOS: Physical sciences

description: We measured, using Petawatt-level pulses, the average ion energy and neutron yield in high-intensity laser interactions with molecular clusters as a function of laser intensity. The interaction volume over which fusion occurred (1-10 mm^3) was larger than previous investigations, owing to the high laser power. Possible effects of prepulses were examined by implementing a pair of plasma mirrors. Our results show an optimum laser intensity for the production of energetic deuterium ions both with and without the use of the plasma mirrors. We measured deuterium plasmas with 14 keV average ion energies, which produced 7.2x10^6 and 1.6x10^7 neutrons in a single shot with and without plasma mirrors, respectively. The measured neutron yields qualitatively matched the expected yields calculated using a cylindrical plasma model.
description: 24 pages, 7 figures
Strained topological insulator spin field effect transistor
Creators: name: Bandyopadhyay, Supriyo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Other Condensed Matter (cond-mat.other)
subject: FOS: Physical sciences

description: The notion of a spin field effect transistor, where transistor action is realized by manipulating the spin degree of freedom of charge carriers instead of the charge degree of freedom, has captivated researchers for at least three decades. These transistors are usually implemented by modulating the spin orbit interaction in a two- or one-dimensional semiconductor structure with an electrostatic potential, which then causes controlled spin precession in the transistor's channel that modulates the current flowing between two ferromagnetic (spin-polarized) source and drain contacts. Here, we introduce a new concept for a spin field effect transistor whose channel is made of a strained topological insulator (strained-topological-insulator-field-effect-transistor or STI-SPINFET), which does not exploit spin-orbit interaction. Instead, the transistor function is elicited by straining the topological insulator (TI) with a gate voltage which modifies the energy dispersion relation, or the Dirac velocity, to vary the interference between the two spin eigenstates on the surface of the TI. This modulates the current flowing between two ferromagnetic source and drain contacts. The conductance on/off ratio of this transistor is too poor to be useful as a switch, but it may have other uses, such as an extremely energy-efficient stand-alone frequency multiplier.
description: Some additions and clarifications have been added in the appendix corresponding to the ideal topological insulator
Equality Opportunity: Marriage Litigation and Iowa’s Equal Protection Law
Creators: name: Goldberg, Suzanne B.
name: Hinger, Sarah
name: Zwick, Keren
Publisher: name: Columbia University
Year: 2008
Subjects: subject: Law
subject: FOS: Law
subject: Constitutional law
subject: Equality
subject: Civil rights
subject: Same-sex marriage--Law and legislation--U.S. states

description: Discrimination claims against longstanding rules invite the public and the courts to rethink the status quo and address overarching legal and social commitments to equality together with questions specific to the case at hand. Lawsuits seeking marriage rights for same-sex couples quintessentially illustrate this multilayered nature of law reform litigation, as the debates they provoke focus not only on the rights of same-sex couples but also on the meaning of marriage and the meaning of equality more generally. While few other than lawyers, judges, and perhaps some reporters actually read the equal protection and due process arguments that the presiding court will consider, many community members where marriage litigation is taking place become fully engaged in debating the equality and fundamental rights questions implicated by the legal claims. This degree of popular attention certainly exists in Iowa, where talk of gay couples marrying took center stage even before a lawsuit was filed in the Iowa district court in 2005. The suit, which was brought by six lesbian and gay couples and eventually joined by some of the couples’ children, is one of many marriage equality suits to be filed in recent years and is the first to be filed in the Midwest. Yet while the public debate may be wide-ranging, it typically misses the ways in which the lawsuit may have long-term consequences for a state’s equality jurisprudence that extend well beyond marriage. In Iowa, specifically, while Varnum v. Brien focuses directly on marriage equality, the case also engages an ongoing conversation among the state’s courts about how Iowa’s equality guarantees should be enforced. This essay introduces an amicus brief filed with the Iowa Supreme Court on behalf of three Iowa constitutional law scholars that addresses these broad questions about the future of Iowa equal protection law. In publishing the brief with the University of Iowa College of Law’s Journal of Gender, Race & Justice, we aim to show why, both in Iowa and around the country, courts would be better off embracing a single standard of equal protection review rather than the ossified and often ineffective federal tiered approach. By highlighting the brief’s implications for issues beyond marriage, we also aim to illustrate the point that law reform litigation, especially regarding contested social issues, often implicates not only the specific claim before the court but also other far-reaching questions about the jurisprudential status quo.
Die körperliche Beschaffenheit der Andernacher Bevölkerung zur Zeit der Karlinger
Creators: name: Kruse, [?]
Publisher: name: Bonner Jahrbücher
Year: 2017

description: [nicht vorhanden / not available]
description: Bonner Jahrbücher, Bd. 105 (1900): Bonner Jahrbücher : Jahrbücher des Vereins von Altertumsfreunden im Rheinlande
Empirical Determination of the Pion Mass Distribution
Creators: name: Xu, Yin-Zhen
name: Raya, Khépani
name: Cui, Zhu-Fang
name: Roberts, Craig D.
name: Rodríguez-Quintero, J.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Existing pion+nucleus Drell-Yan and electron+pion scattering data are used to develop ensembles of model-independent representations of the pion generalised parton distribution (GPD). Therewith, one arrives at a data-driven prediction for the pion mass distribution form factor, $θ_2$. Compared with the pion elastic electromagnetic form factor, $θ_2$ is harder: the ratio of the radii derived from these two form factors is $r_π^{θ_2}/r_π= 0.79(3)$. Our data-driven predictions for the pion GPD, related form factors and distributions should serve as valuable constraints on theories of pion structure.
description: 9 pages, 6 figures, 1 table. Version accepted for publication as an Express Letter in Chin. Phys. Lett
Die visuelle und materielle Kultur der Scholastik / La culture visuelle et matérielle de la scolastique
Creators: name: Schwarz, Martin
Publisher: name: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel
Year: 2017

description: -
description: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel, Jahresbericht / Rapport annuel 2015/2016
Veröffentlichungen / Publications
Creators: name: Redaktion, Die
Publisher: name: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel
Year: 2017

description: -
description: Deutsches Forum für Kunstgeschichte (DFK Paris): Jahresbericht / Rapport annuel, Jahresbericht / Rapport annuel 2015/2016
Discrimination by Comparison
Creators: name: Goldberg, Suzanne B.
Publisher: name: Columbia University
Year: 2011
Subjects: subject: Law
subject: FOS: Law
subject: Civil rights
subject: Discrimination--Law and legislation
subject: Discrimination in employment--Law and legislation

description: Contemporary discrimination law is in crisis, both methodologically and conceptually. The crisis arises in large part from the judiciary’s dependence on comparators—those who are like a discrimination claimant but for the protected characteristic—as a favored heuristic for observing discrimination. The profound mismatch of the comparator methodology with current understandings of identity discrimination and the realities of the modern workplace has nearly depleted discrimination jurisprudence and theory. Even in run-of-the-mill cases, comparators often cannot be found, particularly in today’s mobile, knowledge-based economy. This difficulty is amplified for complex claims, which rest on thicker understandings of discrimination developed in second-generation intersectionality, identity performance, and structural discrimination theories. By treating comparators as an essential element of discrimination, instead of as a heuristic device to help discern whether discrimination has occurred, courts have largely foreclosed these other theories from consideration. At the same time, courts have further shrunk the very idea of discrimination by disregarding a central lesson from harassment and stereotyping jurisprudence: discrimination can occur without a comparator present. The comparator methodology retains its appeal, despite these deficiencies, because its empirical patina permits courts to evaluate discrimination claims without appearing to engage in a subjective analysis of workplace dynamics. Given the complex nature of both identity and discrimination, however, the comparisons produce a false certainty at best. By contrast, alternate methodologies, including the contextual consideration favored in harassment and stereotyping jurisprudence as well as the hypothetical comparator embraced in European law, offer a meaningful framework for matching discrimination law and norms to workplace facts, while preserving judicial legitimacy. With comparators dislodged from their methodological pedestal, we may yet recover space for the renewed development of discrimination jurisprudence and theory.
Event Tables for Efficient Experience Replay
Creators: name: Kompella, Varun
name: Walsh, Thomas J.
name: Barrett, Samuel
name: Wurman, Peter
name: Stone, Peter
Publisher: name: arXiv
Year: 2022
Subjects: subject: Machine Learning (cs.LG)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Experience replay (ER) is a crucial component of many deep reinforcement learning (RL) systems. However, uniform sampling from an ER buffer can lead to slow convergence and unstable asymptotic behaviors. This paper introduces Stratified Sampling from Event Tables (SSET), which partitions an ER buffer into Event Tables, each capturing important subsequences of optimal behavior. We prove a theoretical advantage over the traditional monolithic buffer approach and combine SSET with an existing prioritized sampling strategy to further improve learning speed and stability. Empirical results in challenging MiniGrid domains, benchmark RL environments, and a high-fidelity car racing simulator demonstrate the advantages and versatility of SSET over existing ER buffer sampling approaches.
Handwashing Action Detection System for an Autonomous Social Robot
Creators: name: Sasidharan, Sreejith
name: Prabha, Pranav
name: Pasupuleti, Devasena
name: Das, Anand M
name: Kapoor, Chaitanya
name: Manikutty, Gayathri
name: Pankajakshan, Praveen
name: Rao, Bhavani
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Young children are at an increased risk of contracting contagious diseases such as COVID-19 due to improper hand hygiene. An autonomous social agent that observes children while handwashing and encourages good hand washing practices could provide an opportunity for handwashing behavior to become a habit. In this article, we present a human action recognition system, which is part of the vision system of a social robot platform, to assist children in developing a correct handwashing technique. A modified convolution neural network (CNN) architecture with Channel Spatial Attention Bilinear Pooling (CSAB) frame, with a VGG-16 architecture as the backbone is trained and validated on an augmented dataset. The modified architecture generalizes well with an accuracy of 90% for the WHO-prescribed handwashing steps even in an unseen environment. Our findings indicate that the approach can recognize even subtle hand movements in the video and can be used for gesture detection and classification in social robotics.
title: Τεχνολογία, εκπαίδευση και εξέλιξη της γνώσης
Creators: name: Πετράκης Μάνος
Publisher: name: Technical University of Crete
Year: 2003

description: Εννοιολογικές αποσαφηνίσεις -- Σχέση τεχνολογίας με την εξέλιξη της γνώσης και την εκπαίδευση -- Διαχωρισμός χειρονακτικής και διανοητικής εργασίας -- Ιστορική αναδρομή στην εκπαιδευτική διαδικασία κατά τη διάρκεια της κοινωνικής εξέλιξης -- Δομικές αλλαγές που επέφερε η νέα εκπαιδευτική πραγματικότητα. Τα "νέα μεσαία στρώματα", η δημιουργία των "ελίτ" -- Μεταμοντερνισμός -- Παρουσίαση τριών βασικών θεωρητικών του μεταμοντερνισμού -- Κριτική στους Μπελ, Λυοτάρ και Ντράκερ -- Εναλλακτικές μορφές εκπαίδευσης, το μοντέλο της "Πολυτεχνικής Εκπαίδευσης" -- Συμπεράσματα
Reinhard Pohlke: Das wissen nur die Götter. Deutsche Redensarten aus dem Griechischen. Mit 19 Lithographien von Honore Daumier
Creators: name: Werner, Jürgen
Publisher: name: Forum Classicum
Year: 2017

description: Rezension zu: Reinhard Pohlke: Das wissen nur die Götter. Deutsche Redensarten aus dem Griechischen. Mit 19 Lithographien von Honore Daumier. 240 S. Artemis & Winkler. Düsseldorf, Zürich 2000. (ISBN 3-7608-1964-8).
description: Forum Classicum, Nr. 1 (2002): Forum Classicum
Constitutive modelling of the densification process in silica glass under hydrostatic compression
Creators: name: Keryvin, V.
name: Meng, J. -X.
name: Gicquel, S.
name: Guin, J. -P.
name: Charleux, L.
name: Sanglebœuf, J. -C.
name: Pilvin, P.
name: Rouxel, T.
name: Quilliec, G. Le
Publisher: name: arXiv
Year: 2013
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The mechanical response of amorphous silica (or silica glass) under hydrostatic compression for very high pressures up to 25 GPa is modelled via an elastic-plastic constitutive equation (continuum mechanics framework).The material parameters appearing in the theory have been estimated from the ex situ experimental data from Rouxel et al. [Rouxel T, Ji H, Guin JP, Augereau F, Ruffle B J Appl Phys 2010;107(9):094903]. The model is shown to capture the major features of the pressure-volume changes response from the in situ experimental work of Sato and Funamori [Sato T, Funamori N Phys Rev Lett 2008;101:255502]. In particular, the onset and saturation of densification, the increase in elasticity parameters (bulk, shear and Youngs moduli) and Poissons ratio are found to be key parameters of the model.
Leadership Development for Educators & Trainers - Best Practices for Addressing Power, Privilege and Oppression when Teaching Topics of Diversity & Increasing the Intersectional Lens in the Classroom - #WRT2020
Creators: name: Shedrick, Dawn E.
name: Marquart, Matthea S.
Publisher: name: Columbia University
Year: 2020
Subjects: Classroom environment
Classroom environment--Social aspects
Multicultural education
Social workers--Training of
Social work education

description: Drawing from experiences teaching courses at Columbia University’s School of Social Work, the presenters will share case studies, best practices, challenges, and emerging issues when teaching diversity courses and for professionals interested in running diversity trainings at their agencies. The session will be interactive and supportive of participants, and build participants’ skills around disruptive leadership that maximizes inclusion. By the end of this workshop, participants should be able to: * Describe ways to build a respectful and supportive classroom/training community that encourages participation from all participants and deepens opportunities for peer learning. * Discuss strategies to create a safe space for marginalized voices to be heard in multiple manifestations during diversity classes/trainings. * Identify pedagogical best practices when developing Racial Identity Development and Gender & Sexuality training curriculum.
Density functional approach to elastic properties of three-dimensional dipole-spring models for magnetic gels
Creators: name: Goh, Segun
name: Menzel, Andreas M.
name: Wittmann, René
name: Löwen, Hartmut
Publisher: name: arXiv
Year: 2022
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Magnetic gels are composite materials, consisting of a polymer matrix and embedded magnetic particles. Those are mechanically coupled to each other, giving rise to the magnetostrictive effects as well as to a controllable overall elasticity responsive to external magnetic fields. Due to their inherent composite and thereby multiscale nature, a theoretical framework bridging different levels of description is indispensable for understanding the magnetomechanical properties of magnetic gels. In this study, we extend a recently developed density functional approach from two spatial dimensions to more realistic three-dimensional systems. Along these lines, we connect a mesoscopic characterization resolving the discrete structure of the magnetic particles, to macroscopic continuum parameters of magnetic gels. In particular, we incorporate the long-range nature of the magnetic dipole-dipole interaction, and consider the approximate incompressibility of the embedding media, and relative rotations with respect to an external magnetic field breaking rotational symmetry. We then probe the shape of the model system in its reference state, confirming the dependence of magnetostrictive effects on the configuration of the magnetic particles and on the shape of the considered sample. Moreover, calculating the elastic and rotational coefficients on the basis of our mesoscopic approach, we examine how the macroscopic types of behavior are related to the mesoscopic properties. Implications for real systems of random particle configurations are also discussed.
description: 16 pages, 4 figures
Evidence for non-thermal X-ray emission from the double WR colliding-wind binary Apep
Creators: name: del Palacio, S.
name: García, F.
name: De Becker, M.
name: Altamirano, D.
name: Bosch-Ramon, V.
name: Benaglia, P.
name: Marcote, B.
name: Romero, G. E.
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Context: Massive colliding-wind binaries (CWBs) can be non-thermal sources. The emission produced in their wind-collision region (WCR) encodes information of both the shocks properties and the relativistic electrons accelerated in them. The recently discovered system Apep, a unique massive system hosting two Wolf-Rayet stars, is the most powerful synchrotron radio emitter among the known CWBs, being an exciting candidate to investigate the non-thermal processes associated with stellar wind shocks. Aims: We intend to break the degeneracy between the relativistic particle population and the magnetic field strength in the WCR of Apep by probing its hard X-ray spectrum, where inverse-Compton (IC) emission is expected to dominate. Methods: We observe Apep with NuSTAR for 60 ks and combine this with a re-analysis of a deep archival XMM-Newton observation to better constrain the X-ray spectrum. We use a non-thermal emission model to derive physical parameters from the results. Results: We detect hard X-ray emission consistent with a power-law component. This is compatible with IC emission produced in the WCR for a magnetic field of 100-160 mG and a fraction of ~1.5e-4 of the total wind kinetic power being converted into relativistic electron acceleration. Conclusions: This is the first time that the non-thermal emission from a CWB is detected both in radio and high energies. This allows us to derive the most robust constraints of the particle acceleration efficiency and magnetic field intensity in a CWB so far, reducing the typical uncertainty of a few orders of magnitude to just within a factor of two. This constitutes an important step forward in our characterisation of the physical properties of CWBs.
description: 12 pages, 6 figures, accepted for publication in A&A
Neutrino mass and leptogenesis in a hybrid seesaw model with a spontaneously broken CP
Creators: name: Pramanick, Rohan
name: Ray, Tirtha Sankar
name: Shaw, Avirup
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We introduce a novel hybrid framework combining type I and type II seesaw models for neutrino mass where a complex vacuum expectation value of a singlet scalar field breaks CP spontaneously. Using pragmatic organizing symmetries we demonstrate that such a model can simultaneously explain the neutrino oscillation data and generate observed baryon asymmetry through leptogenesis. Interestingly, natural choice of parameters leads to a mixed leptogenesis scenario driven by nearly degenerate scalar triplet and right handed singlet neutrino fields for which we present a detailed quantitative analysis.
description: 28 pages, 4 tables, 10 captioned figures; updated text, new appendix added
title: Η ανάπλαση των ακάλυπτων των οικοδομικών τετραγώνων ως εργαλείο βελτίωσης του ιστού της πόλης
Creators: name: Φιλη Νικη-Χριστινα
Publisher: name: Technical University of Crete
Year: 2015

description: Αντικείμενο της ερευνητικής εργασίας αποτελεί η μελέτη του αδόμητου χώρου εντός του οικοδομικού τετραγώνου και διερευνώνται τρόποι για την ανάκτηση και αναζωογόνησή του στις ελληνικέ πόλεις.
A Lower Growth Rate from Recent Redshift Space Distortion Measurements than Expected from Planck
Creators: name: Macaulay, Edward
name: Wehus, Ingunn Kathrine
name: Eriksen, Hans Kristian
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We perform a meta-study of recently published Redshift Space Distortion (RSD) measurements of the cosmological growth rate, f(z) σ_8(z). We analyse the latest results from the 6dFGS, BOSS, LRG, WiggleZ and VIPERS galaxy redshift surveys, and compare the measurements to expectations from Planck. In this Letter we point out that the RSD measurements are consistently lower than the values expected from Planck, and the relative scatter between the RSD measurements is lower than expected. A full resolution of this issue may require a more robust treatment of non-linear effects in RSD models, although the trend for a low σ_8 agrees with recent constraints on σ_8 and Ω_m from Sunyaev-Zeldovich cluster counts identified in Planck.
description: 4 pages, 1 figure, updated to match version accepted in PRL
Continuum reverberation mapping of MCG 08-11-011
Creators: name: Fian, C.
name: Chelouche, D.
name: Kaspi, S.
name: Figaredo, C. Sobrino
name: Lewis, T.
name: Catalan, S.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the results from a photometric reverberation mapping campaign carried out with the C18 telescope at the Wise Observatory from 2019 to 2020, targeting the active galactic nucleus (AGN) MCG 08-11-011. The monitoring was conducted on a daily basis with specially designed narrow-band filters, spanning from optical to near-infrared wavelengths ($\sim4000$ to $8000$Å) and avoiding prominent broad emission lines. We aim to measure inter-band continuum time lags, determine the size-wavelength relation, and estimate the host-subtracted AGN luminosity for this system. We used the point-spread function photometry to extract the continuum light curves and measure the inter-band time lags using several methods, including the interpolated cross-correlation function, the z-transformed discrete correlation function, a von Neumann estimator, JAVELIN (in spectroscopic and photometric mode), MICA, and a multivariate correlation function. We find wavelength-dependent lags, $τ(λ)$, up to $\sim$7 days between the multiband light curves of MCG 08-11-011. The observed lags are larger than predictions based on standard thin-disk theory by a factor of $\sim3-7$. We discern a significantly steeper ($τ\propto λ^{4.74}$) size-wavelength relation than the $τ\propto λ^{4/3}$ expected for a geometrically thin and optically thick accretion disk, which may result from the contribution of diffuse continuum emission to the flux. These results are similar to those found by previous continuum reverberation mapping campaigns.
description: arXiv admin note: text overlap with arXiv:2111.07385
title: Εφαρμογή εργαλείων ανάπλασης σε 3 περιοχές των Χανίων: Κουμ Καπί, Χαλέπα, Νέα Χώρα
Creators: name: Φιλη Νικη-Χριστινα
Publisher: name: Technical University of Crete
Year: 2015

description: Σε επιλεγμένες περιοχές κατοικίας εφαρμόζονται εργαλεία για την αναβάθμισή τους. Οι προτάσεις δεν επιχειρούν να ανατρέψουν την κλίμακα της κάθε περιοχής αλλά να βελτιώσουν με ήπιους τρόπους επέμβασης
Sparse Signal Processing with Linear and Nonlinear Observations: A Unified Shannon-Theoretic Approach
Creators: name: Aksoylar, Cem
name: Atia, George
name: Saligrama, Venkatesh
Publisher: name: arXiv
Year: 2013
Subjects: subject: Information Theory (cs.IT)
subject: Machine Learning (cs.LG)
subject: Statistics Theory (math.ST)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: We derive fundamental sample complexity bounds for recovering sparse and structured signals for linear and nonlinear observation models including sparse regression, group testing, multivariate regression and problems with missing features. In general, sparse signal processing problems can be characterized in terms of the following Markovian property. We are given a set of $N$ variables $X_1,X_2,\ldots,X_N$, and there is an unknown subset of variables $S \subset \{1,\ldots,N\}$ that are relevant for predicting outcomes $Y$. More specifically, when $Y$ is conditioned on $\{X_n\}_{n\in S}$ it is conditionally independent of the other variables, $\{X_n\}_{n \not \in S}$. Our goal is to identify the set $S$ from samples of the variables $X$ and the associated outcomes $Y$. We characterize this problem as a version of the noisy channel coding problem. Using asymptotic information theoretic analyses, we establish mutual information formulas that provide sufficient and necessary conditions on the number of samples required to successfully recover the salient variables. These mutual information expressions unify conditions for both linear and nonlinear observations. We then compute sample complexity bounds for the aforementioned models, based on the mutual information expressions in order to demonstrate the applicability and flexibility of our results in general sparse signal processing models.
description: Final version submitted to Trans. IT
title: Η εγκατάλειψη της μητρόπολης του 20ού αιώνα και η επιστροφή στην ύπαιθρο
Creators: name: Μαραγκου Αννα
Publisher: name: Technical University of Crete
Year: 2015

description: Στην παρούσα ερευνητική, αρχικά παρουσιάζεται η λατρεία προς την πόλη και την ζωή σε αυτή, ενώ στη συνέχεια παρατίθενται οι λόγοι για τους οποίους υπερτερεί το κατοικείν σε μία μικρότερη κλίμακα. Μελετώνται τα κοινόβια των hippies του 1960, και στο τέλος, αναφέρεται συνοπτικά πως αντιμετωπίστηκε η ύπαιθρος από τον έλληνα του 20ού αιώνα.
title: Irruption of the unexpected and the pursuit of hope: earthquakes in Kefalonia, Santorini, Sicily
title: Η εισβολή του απρόβλεπτου και η αναζήτηση της ελπίδας: οι σεισμοί σε Κεφαλονιά, Σαντορίνη και Σικελία
Creators: name: Γκινα Διονυσια
Publisher: name: Technical University of Crete
Year: 2015

description: Τα μνημεία μιας πόλης συνιστούν στοιχεία με διάρκεια, ικανά ώστε να κατανοήσουμε την πόλη ως κάτι που αναπτύσσεται συνεχώς και αποτελούν αναπόσπαστο κομμάτι της ζωής της. Τι γίνεται όμως όταν ένα απρόβλεπτο γεγονός όπως μια σεισμική δόνηση γίνεται αιτία για την ολοκληρωτική καταστροφή του παρελθόντος της πόλης; Ο σεισμός αποτελεί ένα αναπόφευκτο φυσικό φαινόμενο με πολύ σοβαρές συνέπειες, όμως ταυτόχρονα μπορεί να αποτελέσει και την ευκαιρία για ριζικές μεταβολές στη χρήση και στον τρόπο αξιοποίησης του χώρου, που σε διαφορετική περίπτωση δε θα ήταν εφικτή. Η παρούσα ερευνητική εργασία διερευνά έτσι τα αποτελέσματα μιας φυσικής καταστροφής, όπως είναι ο σεισμός στο υφιστάμενο δομημένο περιβάλλον ενός τόπου και στις επιλογές αντιμετώπισης του από την εκάστοτε πολιτεία. Αν δηλαδή είναι δυνατόν μέσα από μια πιο ολοκληρωμένη δράση: πρόληψη, διαχείριση και αντιμετώπιση της φυσικής καταστροφής, να αποτελέσει αυτή η καταστροφή την ευκαιρία για μια καλύτερη ποιότητα ζωής μέσα σε ένα καλύτερα δομημένο περιβάλλον. Η έρευνα πιο συγκεκριμένα εστιάζει σε τρία παραδείγματα, δύο περιοχές από τον ελλαδικό χώρο που πλήγηκαν από σεισμούς τη δεκαετία του ’50, την Κεφαλονιά και τη Σαντορίνη καθώς και μια περιοχή από το νησί της Σικελίας που πλήγηκε από το σεισμό τη δεκαετία του ’60. Πέραν των εισαγωγικών κεφαλαίων η εργασία αποτελείται από τρία βασικά κεφάλαια με έννοιες – δίπολα, στα οποία παρουσιάζονται και αναλύονται κάθε φορά παραδείγματα χαρακτηριστικών οικισμών από τις περιοχές που περιγράφηκαν παραπάνω και σχετίζονται με τις έννοιες αυτές. Τα κεφάλαια αυτά συνοδεύονται από χάρτες οικισμών, οι οποίοι βασίζονται σε αποσπασματικό βιβλιογραφικό και αρχειακό υλικό και έχουν υποστεί επεξεργασία, καθώς και από άλλα σχέδια και σκίτσα προκειμένου να πραγματοποιηθεί σύγκρισή μεταξύ των οικισμών των διαφόρων περιοχών για την ολοκληρωμένη κατανόηση της δυναμικής των πόλεων μετά το καταστροφικό σεισμικό γεγονός.