cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Creación de usuario para el CMS
Creators: name: Rodríguez Cárdenas, Daniel
name: Vargas, John Leonardo
Publisher: name: Universidad del Rosario
Year: 2018

description: Video que hace parte del Mooc Diseño de Sistemas de información gerencial para Internet con MySQL / PHP y Joomla donde se ve el paso a paso para la creación de un usuario, luego este se usará para instalar y configurar Joomla.
title: Εφαρμογή ορθών πρακτικών μεταχείρισης των τροφίμων από τους παιδικούς σταθμούς του Δήμου Πειραιά
title: Application of correct practices handling food in the nursery schools of municipality of Piraeus
titleType: AlternativeTitle
Creators: name: Παπαδημητρίου, Φανή
Publisher: name: Πανεπιστήμιο Δυτικής Αττικής
Year: 2023
Subjects: Παιδικός σταθμός
Νήπια
Βρέφη
Τρόφιμα
Μεταχείριση τροφίμων
Ορθές πρακτικές
Διασφάλισης ποιότητας τροφίμων
Ποιοτικός έλεγχος
Δήμος Πειραιά
Kindergartens
Municipality of Piraeus
Food
Quality control

description: Ο σκοπός της παρούσας πτυχιακής εργασίας είναι να αναδειχθούν: η ορθή πολιτική της εφαρμογής ενός συστήματος ποιοτικού ελέγχου και διασφάλισης ποιότητας των τροφίμων που χρησιμοποιούνται για τη σίτιση των νηπίων στους παιδικούς σταθμούς του Δήμου Πειραιά, και η κατάλληλη εκπαίδευση του προσωπικού που μεταχειρίζεται τα τρόφιμα και προετοιμάζει τα γεύματα των νηπίων. Στα πλαίσια της συγκεκριμένης πτυχιακής, ύστερα από συνεννόηση με τους υπευθύνους των παιδικών σταθμών του Δήμου Πειραιά, καταγράφονται: 1. οι πρακτικές που εφαρμόζονται κατά την παραλαβή, αποθήκευση και μεταχείριση των τροφίμων που χρησιμοποιούνται για την παρασκευή των γευμάτων, 2. ο τρόπος συντήρησης των γευμάτων μέχρι να διατεθούν στα νήπια, 3. τα είδη των προϊόντων που επιλέγονται για τη σίτιση των νηπίων, 4. οι πρακτικές καθαριότητας και απολύμανσης του χώρου παρασκευής των γευμάτων, καθώς αυτό το κομμάτι αποτελεί αναπόσπαστο μέρος των ορθών πρακτικών μεταχείρισης των τροφίμων. 5. η συνολική εκπαίδευση που έχει δεχθεί το προσωπικό που έρχεται σε επαφή με τα τρόφιμα και παρασκευάζει τα προσφερόμενα γεύματα. Το όφελος από τη συγκεκριμένη ερευνητική πτυχιακή είναι η ανάδειξη της εφαρμογής ορθών πρακτικών μεταχείρισης τροφίμων σε ένα πολύ ευαίσθητο χώρο, όπως οι παιδικοί σταθμοί, και ιδίως στο δημόσιο τομέα.
Entanglement on macroscopic scales in a resonantly laser-excited atomic ensemble
Creators: name: Camalet, S.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We show that two groups of slow two-level atoms in a weak resonant laser field, are entangled. The considered groups can be separated by a macroscopic distance, and be parts of a larger atomic ensemble. In a dilute regime, for two very distant groups of atoms, in a plane wave laser beam, we determine the maximum attainable entanglement negativity, and a laser intensity below which they are certainly entangled. They both decrease with increasing distance between the two groups, but increase with enlarging groups sizes. As a consequence, for given laser intensity, far separated groups of atoms are necessarily entangled if they are big enough.
Ingresar datos con formularios
Creators: name: Rodríguez Cárdenas, Daniel
name: Vargas, John Leonardo
Publisher: name: Universidad del Rosario
Year: 2019

description: Videotutorial que hace parte del Mooc Diseño de Sistemas de información gerencial para Internet con MySQL / PHP y Joomla donde se indica el procedimiento para ingresar datos a un CRM desde la interface de un usuario, utilizando formularios.
title: DaZ-Lehrwerke aus der Perspektive der Schülerinnen und Schüler
Creators: name: Lechner, Erika
Year: 2022

description: Ziel der Masterarbeit ist es, die Qualität der verwendeten Lehrwerke im DaZ-Unterricht aus Perspektive der Schülerinnen und Schüler zu analysieren. Im Rahmen der Arbeit werden zwei Schulbücher, die speziell auf den Deutsch-als-Zweitsprachen-Unterricht ausgelegt sind, verglichen. Anschließend wird versucht allgemeine Kriterien abzuleiten, anhand deren Schülerinnen und Schüler ihre Lehrbücher beurteilen. Als Forschungsmethode wurde das mündliche Interview auf Basis eines Leitfadens und die qualitative Datenanalyse gewählt. Basierend auf den ausgewerteten Daten werden die beiden Schulbücher anhand der Kategorien, äußere Gestaltung, Themenbereiche, Aufgabentypen- und Aufgabenstellung, Grammatik und Abbildungen, analysiert. Ein ansprechendes Layout, eine zeitgemäße Gestaltung und moderne Fotos als Abbildungen sind für die Lernenden wichtige Punkte, die ihre Lernmotivation steigern können. Inhaltlich wird viel Wert auf im Alltag nützliche und fächerübergreifende Themen gelegt. Bei den Aufgaben achten die Schülerinnen und Schüler besonders auf die Verständlichkeit und Abwechslung, ausreichende Übungsmöglichkeiten des vermittelten Wissens sind ebenso relevant wie einfach formulierte Aufgabenstellungen. Bezüglich der Grammatik scheinen Konzepte mit integrierten grammatikalischen Teilen in jedes Kapitel bei den Sprachlernenden Erfolg zu haben. Diese Kriterien konnten durch die Datenerhebung identifiziert werden, mittels deren Schülerinnen und Schüler ihre Schulbücher im DaZ-Unterricht bewerten. Weitere empirische Studien wären anstrebenswert, um die Ergebnisse weiterzuverfolgen und zu spezifizieren.
Atomic electronic structure calculations with Hermite interpolating polynomials
Creators: name: Lehtola, Susi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We have recently described the implementation of atomic electronic structure calculations within the finite element method with numerical radial basis functions of the form $χ_μ(r)=r^{-1}B_μ(r)$, where high-order Lagrange interpolating polynomials (LIPs) were used as the shape functions $B_μ(r)$ [S. Lehtola, Int. J. Quantum Chem. 119, e25945 (2019)]. In this work, we discuss how $χ_μ(r)$ can be evaluated in a stable manner at small $r$ and also revisit the choice of the shape functions $B_μ(r)$. Three kinds of shape functions are considered: in addition to the $\mathcal{C}^{0}$ continuous LIPs, we consider the analytical implementation of first-order Hermite interpolating polynomials (HIPs) that are $\mathcal{C}^{1}$ continuous, as well as numerical implementations of $n$-th order ($\mathcal{C}^{n}$ continuous) HIPs that are expressed in terms of an underlying high-order LIP basis. Furnished with the new implementation, we demonstrate that the first-order HIPs are reliable even with large numbers of nodes and that they also work with non-uniform element grids, affording even better results in atomic electronic structure calculations than LIPs with the same total number of basis functions. We demonstrate that discontinuities can be observed in the spin-$σ$ local kinetic energy $τ_σ$ in small LIP basis sets, while HIP basis sets do not suffer from such issues; however, either set can be used to reach the complete basis set limit with smooth $τ_σ$. Moreover, we discuss the implications of HIPs on calculations with meta-GGA functionals with a number of recent meta-GGA functionals, and find most Minnesota functionals to be ill-behaved. We also examine the potential usefulness of the explicit control over the derivative in HIPs for forming numerical atomic orbital basis sets, but find that confining potentials are still likely a better option.
description: 26 pages, 9 figures. Fixed typos
Baryon effects on the internal structure of LCDM halos in the EAGLE simulations
Creators: name: Schaller, Matthieu
name: Frenk, Carlos S.
name: Bower, Richard G.
name: Theuns, Tom
name: Jenkins, Adrian
name: Schaye, Joop
name: Crain, Robert A.
name: Furlong, Michelle
name: Vecchia, Claudio Dalla
name: McCarthy, I. G.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the internal structure and density profiles of halos of mass $10^{10}-10^{14}~M_\odot$ in the Evolution and Assembly of Galaxies and their Environment (EAGLE) simulations. These follow the formation of galaxies in a $Λ$CDM Universe and include a treatment of the baryon physics thought to be relevant. The EAGLE simulations reproduce the observed present-day galaxy stellar mass function, as well as many other properties of the galaxy population as a function of time. We find significant differences between the masses of halos in the EAGLE simulations and in simulations that follow only the dark matter component. Nevertheless, halos are well described by the Navarro-Frenk-White (NFW) density profile at radii larger than ~5% of the virial radius but, closer to the centre, the presence of stars can produce cuspier profiles. Central enhancements in the total mass profile are most important in halos of mass $10^{12}-10^{13}M_\odot$, where the stellar fraction peaks. Over the radial range where they are well resolved, the resulting galaxy rotation curves are in very good agreement with observational data for galaxies with stellar mass $M_*<5\times10^{10}M_\odot$. We present an empirical fitting function that describes the total mass profiles and show that its parameters are strongly correlated with halo mass.
description: 21 pages, 17 figures, version accepted for publication in MNRAS
Meta-GGA density functional calculations on atoms with spherically symmetric densities in the finite element formalism
Creators: name: Lehtola, Susi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Density functional calculations on atoms are often used for determining accurate initial guesses as well as generating various types of pseudopotential approximations and efficient atomic-orbital basis sets for polyatomic calculations. To reach the best accuracy for these purposes, the atomic calculations should employ the same density functional as the polyatomic calculation. Atomic density functional calculations are typically carried out employing spherically symmetric densities, corresponding to the use of fractional orbital occupations. We have described their implementation for density functional approximations (DFAs) belonging to the local density approximation (LDA) and generalized gradient approximation (GGA) levels of theory as well as Hartree-Fock (HF) and range-separated exact exchange [S. Lehtola, Phys. Rev. A 2020, 101, 012516]. In this work, we describe the extension to meta-GGA functionals using the generalized Kohn-Sham scheme, in which the energy is minimized with respect to the orbitals, which in turn are expanded in the finite element formalism with high-order numerical basis functions. Furnished with the new implementation, we continue our recent work on the numerical well-behavedness of recent meta-GGA functionals [S. Lehtola and M. A. L. Marques, J. Chem. Phys. 2022, 157, 174114]. We pursue complete basis set (CBS) limit energies for recent density functionals, and find many to be ill-behaved for the Li and Na atoms. We report basis set truncation errors (BSTEs) of some commonly used Gaussian basis sets for these density functionals and find the BSTEs to be strongly functional dependent. We also discuss the importance of density thresholding in DFAs and find that all of the functionals studied in this work yield total energies converged to $0.1\ μE_{h}$ when densities smaller than $10^{-11}a_{0}^{-3}$ are screened out.
description: 30 pages, 2 figures. Fixed some typos
The approximate Loebl-Komlos-Sos conjecture and embedding trees in sparse graphs
Creators: name: Hladky, Jan
name: Piguet, Diana
name: Simonovits, Miklos
name: Stein, Maya
name: Szemeredi, Endre
Publisher: name: arXiv
Year: 2014
Subjects: subject: Combinatorics (math.CO)
subject: FOS: Mathematics

description: Loebl, Komlós and Sós conjectured that every $n$-vertex graph $G$ with at least $n/2$ vertices of degree at least $k$ contains each tree $T$ of order $k+1$ as a subgraph. We give a sketch of a proof of the approximate version of this conjecture for large values of $k$. For our proof, we use a structural decomposition which can be seen as an analogue of Szemerédi's regularity lemma for possibly very sparse graphs. With this tool, each graph can be decomposed into four parts: a set of vertices of huge degree, regular pairs (in the sense of the regularity lemma), and two other objects each exhibiting certain expansion properties. We then exploit the properties of each of the parts of $G$ to embed a given tree $T$. The purpose of this note is to highlight the key steps of our proof. Details can be found in [arXiv:1211.3050].
Two-component energy spectrum of cuprates in the pseudogap phase and its evolution with temperature and at charge ordering
Creators: name: Gor'kov, Lev P.
name: Teitel'baum, Gregory B.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In the search for mechanisms of high-temperature superconductivity it is critical to know the electronic spectrum in the pseudogap phase from which superconductivity evolves. The lack of angle-resolved photoemission data for every cuprate family precludes an agreement as to its structure, doping and temperature dependence and the role of charge ordering. Here we show that, in the entire Fermi-liquid-like regime that is ubiquitous in underdoped cuprates, the spectrum consists of holes on the Fermi arcs and an electronic pocket. We argue that experiments on the Hall coefficient identify the latter as a permanent feature at doped hole concentration x>0.08-0.10, in contrast to the idea of the Fermi surface reconstruction via charge ordering. The longstanding issue of the origin of the negative Hall coefficient in YBCO and Hg1201 at low temperature is resolved: the electronic contribution prevails as mobility of the latter (evaluated by the Dingle temperature) becomes temperature independent, while the mobility of holes scattered by the short-wavelength charge density waves decreases.
description: 16 pages, 3 figures, title changed, final manuscript, close to the published version, Scientific Reports 5, (2015)
Herramientas para el diseño de un modelo relacional
Creators: name: Rodríguez Cárdenas, Daniel
name: Vargas, John Leonardo
Publisher: name: Universidad del Rosario
Year: 2019

description: Video que hace parte del Mooc Diseño de Sistemas de información gerencial para Internet con MySQL / PHP y Joomla que indica cómo crear y diseñar un modelo relacional a partir de plantillas o  desde cero.
Fast and noise-resistant implementation of quantum phase gates and creation of quantum entangled states
Creators: name: Chen, Ye-Hong
name: Xia, Yan
name: Chen, Qing-Qin
name: Song, Jie
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The "Lewis-Riesenfeld phases" which plays a crucial role in constructing shortcuts to adiabaticity may be a resource for the implementation of quantum phase gates. By combining "Lewis-Riesenfeld invariant" with "quantum Zeno dynamics", we propose an effective scheme of rapidly implementing $π$ phase gates via constructing shortcuts to adiabatic passage in a two-distant-atom-cavity system. The influence of various decoherence processes such as spontaneous emission and photon loss on the fidelity is discussed. It is noted that this scheme is insensitive to both two error sources. Additionally, a creation of N-atom cluster states is put forward as a typical example of the applications of the fast and noise-resistant phase gates. The study results show that the shortcuts idea is not only applicable in other logic gates with different systems, but also propagable for many quantum information tasks.
description: 22 pages (one column), 9 figures, accepted for publication as a Regular Article in Physical Review A
Discontinuity of Maximum Entropy Inference and Quantum Phase Transitions
Creators: name: Chen, Jianxin
name: Ji, Zhengfeng
name: Li, Chi-Kwong
name: Poon, Yiu-Tung
name: Shen, Yi
name: Yu, Nengkun
name: Zeng, Bei
name: Zhou, Duanlu
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In this paper, we discuss the connection between two genuinely quantum phenomena --- the discontinuity of quantum maximum entropy inference and quantum phase transitions at zero temperature. It is shown that the discontinuity of the maximum entropy inference of local observable measurements signals the non-local type of transitions, where local density matrices of the ground state change smoothly at the transition point. We then propose to use the quantum conditional mutual information of the ground state as an indicator to detect the discontinuity and the non-local type of quantum phase transitions in the thermodynamic limit.
description: Major revision. 26 pages, 12 figures
Are there any Landau poles in wavelet-based quantum field theory?
Creators: name: Altaisky, Mikhail
name: Hnatich, Michal
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Following previous work by one of the authors [M.V.Altaisky, Unifying renormalization group and the continuous wavelet transform, Phys. Rev. D 93, 105043 (2016).], we develop a new approach to the renormalization group, where the effective action functional $Γ_A[ϕ]$ is a sum of all fluctuations of scales from the size of the system $L$ down to the scale of observation $A$. It is shown that the renormalization flow equation of the type $ \frac{\partial Γ_A}{\partial \ln A}=-Y(A) $ is a limiting case of such consideration, when the running coupling constant is assumed to be a differentiable function of scale. In this approximation, the running coupling constant, calculated at one-loop level, suffers from the Landau pole. In general case, when the scale-dependent coupling constant is a non-differentiable function of scale, the Feynman loop expansion results in a difference equation. This keeps the coupling constant finite for any finite value of scale $A$. As an example we consider Euclidean $ϕ^4$ field theory.
description: RevTeX, 13 pages, 3 eps figures
title: Soziale Konstruktion von Geschlecht im Schulsport
Creators: name: Kuzmits, Magdalena Ludovika
Year: 2022

description: Studienergebnisse zeigen, dass sich das Unterrichtsfach Bewegung und Sport in Bezug auf die soziale Konstruktion von Geschlecht in einigen Aspekten „mitschuldig“ zeige, da es sowohl zur Aufrechterhaltung traditioneller Geschlechterhierarchien beitrage, wie auch Vorstellungen von typisch weiblichen und männlichen Körpern transportiere. Zudem konnte festgestellt werden, dass Praktiken und Diskurse in Bezug auf den Sportunterricht auf ebendiesen traditionellen Vorstellungen von Körper und Geschlecht beruhen, was die Vorstellung einer binären Geschlechterordnung fördere und heteronormative Verhaltensweisen manifestiere. Diese Arbeit stellt die Wahrnehmung der Schüler*innen auf diese Prozesse in den Fokus. Mittels einer qualitativen Inhaltsanalyse von Fokusgruppeninterviews konnte festgestellt werde, dass Doing Gender-Prozesse von Schüler*innen in unterschiedlichen Situationen und anhand der Thematisierung vielzähliger Aspekte im und rund um den Sportunterrichtet verortet und wahrgenommen werden. Dennoch kommt man durch die Aussagen der Schüler*innen zur Annahme, dass sie trotz der Wahrnehmung von ablaufenden Prozessen sozialer Konstruktion von Geschlecht zur Reproduktion heteronormativer Verhaltensweisen neigen. Daraus kann abgeleitet werden, dass sie sich der Auswirkungen hinsichtlich der Aufrechterhaltung der Hierarchisierung der Geschlechter und somit der patriarchalen Geschlechterordnung bei Weitem nicht bewusst sind.
Non-linear bond-operator theory and 1/d expansion for coupled-dimer magnets I: Paramagnetic phase
Creators: name: Joshi, Darshan G.
name: Coester, Kris
name: Schmidt, Kai P.
name: Vojta, Matthias
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: For coupled-dimer Heisenberg magnets, a paradigm of magnetic quantum phase transitions, we develop a systematic expansion in 1/d, the inverse number of space dimensions. The expansion employs a formulation of the bond-operator technique and is based on the observation that a suitably chosen product-state wavefunction yields exact zero-temperature expectation values of local observables in the d->infty limit, with corrections vanishing as 1/d. We demonstrate the approach for a model of dimers on a hypercubic lattice, which generalizes the square-lattice bilayer Heisenberg model to arbitrary d. In this paper, we use the 1/d expansion to calculate static and dynamic observables at zero temperature in the paramagnetic singlet phase, up to the quantum phase transition, and compare the results with numerical data available for d=2. Contact is also made with previously proposed refinements of bond-operator theory as well as with a perturbative expansion in the inter-dimer coupling. In a companion paper, the present 1/d expansion will be extended to the ordered phase, where it is shown to consistently describe the entire phase diagram including the quantum critical point.
description: 23 pages, 9 figures; (v2) minor corrections and modifications; (v3) final version as published
Optimal reaction coordinates and kinetic rates from the projected dynamics of transition paths
Creators: name: Mouaffac, Line
name: Palacio-Rodriguez, Karen
name: Pietrucci, Fabio
Publisher: name: arXiv
Year: 2023
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Finding optimal reaction coordinates and predicting accurate kinetic rates for activated processes are two of the foremost challenges of molecular simulations. We introduce an algorithm that tackles the two problems at once: starting from a limited number of reactive molecular dynamics trajectories (transition paths), we automatically generate with a Monte Carlo approach a sequence of different reaction coordinates that progressively reduce the kinetic rate of their projected effective dynamics. Based on a variational principle, the minimal rate accurately approximates the exact one, and it corresponds to the optimal reaction coordinate. After benchmarking the method on an analytic double-well system, we apply it to complex atomistic systems: the interaction of carbon nanoparticles of different sizes in water.
description: 19 pages, 10 figures
Computation of a possible Tunguska's strewn field
Creators: name: Carbognani, Albino
name: Di Martino, Mario
name: Stirpe, Giovanna
Publisher: name: arXiv
Year: 2023
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: On June 30, 1908, at about 0h 14.5m UTC, the Tunguska Event (TE) occurred, most likely caused by the fall of a small stony asteroid of about 50-80 meters in diameter over the basin of the Tunguska River (Central Siberia). This paper will establish whether stony macroscopic fragments could have survived the TCB's airburst (Tunguska Cosmic Body) and where they might have fallen. For this purpose, we have implemented a fall model to describe the mass ablation, pancake expansion, airburst and fragments's dark flight. In our scenario, the fragments have a higher mean strength than the main body due to Weibull's law. The results, for a TCB with a kinetic energy of 15 Mt, atmospheric speed in the range of 11-20 km/s, trajectory inclination of $35^\circ$ and average strength in the range of 3-70 MPa, tell us that for a macroscopic fragment with a mean strength between 14-85 MPa would be possible to survive the high pressure and temperature airburst to reach the ground. The falling speed of the fragments is in the range of 0.8-0.5 km/s, favouring their burial in the permafrost. The range of mean strength values for the TCB's macroscopic fragment appears physically plausible if we consider the falls of Carancas in 2007, with an estimated strength in the range of 20-40 MPa. So our possible strewn field, computed for a typical fall speed of $10 \pm 3 $ km/s, is located about 11 km northwest from the epicentre, with an area of about $140~\textrm{km}^2$. Finally, Cheko Lake, which by some authors is considered an impact crater, falls about 3.5 km outside the strewn fields at 3 sigma level and it is unlikely that it could be a real impact crater: only if the TCB's trajectory had an azimuth in the range $150^\circ - 180^\circ$ would be in the strewn field area, but this is not consistent with the most likely trajectory azimuth.
description: 19 pages, 7 figures, draft of a work in progress, version 7
The Bispectrum in the Effective Field Theory of Large Scale Structure
Creators: name: Baldauf, Tobias
name: Mercolli, Lorenzo
name: Mirbabayi, Mehrdad
name: Pajer, Enrico
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the bispectrum in the Effective Field Theory of Large Scale Structure, consistently accounting for the effects of short-scale dynamics. We begin by proving that, as long as the theory is perturbative, it can be formulated to arbitrary order using only operators that are local in time. We then derive all the new operators required to cancel the UV-divergences and obtain a physically meaningful prediction for the one-loop bispectrum. In addition to new, subleading stochastic noises and the viscosity term needed for the one-loop power spectrum, we find three new effective operators. The three new parameters can be constrained by comparing with N-body simulations. The best fit is precisely what is suggested by the structure of UV-divergences, hence justifying a formula for the EFTofLSS bispectrum whose only fitting parameter is already fixed by the power spectrum. This result predicts the bispectrum of N-body simulations up to $k \approx 0.22\, h\, \text{Mpc}^{-1}$ at $z=0$, an improvement by nearly a factor of two as compared to one-loop standard perturbation theory.
description: 63 pages, 18 figures, as published in JCAP
Decentralized Convergence to Nash Equilibria in Constrained Deterministic Mean Field Control
Creators: name: Grammatico, Sergio
name: Parise, Francesca
name: Colombino, Marcello
name: Lygeros, John
Publisher: name: arXiv
Year: 2014
Subjects: subject: Systems and Control (eess.SY)
subject: Computer Science and Game Theory (cs.GT)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: This paper considers decentralized control and optimization methodologies for large populations of systems, consisting of several agents with different individual behaviors, constraints and interests, and affected by the aggregate behavior of the overall population. For such large-scale systems, the theory of aggregative and mean field games has been established and successfully applied in various scientific disciplines. While the existing literature addresses the case of unconstrained agents, we formulate deterministic mean field control problems in the presence of heterogeneous convex constraints for the individual agents, for instance arising from agents with linear dynamics subject to convex state and control constraints. We propose several model-free feedback iterations to compute in a decentralized fashion a mean field Nash equilibrium in the limit of infinite population size. We apply our methods to the constrained linear quadratic deterministic mean field control problem and to the constrained mean field charging control problem for large populations of plug-in electric vehicles.
description: IEEE Trans. on Automatic Control (cond. accepted)
Επιχειρηματική ηθική και κοινωνική υπευθυνότητα στο στρατηγικό management των επιχειρήσεων
Creators: name: Λαδάκης, Ευάγγελος
Publisher: name: Πανεπιστήμιο Πειραιώς
Year: 2023
Subjects: subject: Management
subject: ESG
subject: Environmental
subject: Social
subject: Governance
subject: Shipping
subject: Επιχειρηματική ευθύνη

description: Η εργασία αυτή πραγματεύεται τις έννοιες της Εταιρικής Ηθικής, της Εταιρικής Κοινωνικής Ευθύνης(EΚΕ), την εξέλιξη καθώς και τις διαστάσεις τις τελευταίας. Αναπτύσει τις σχέσεις μεταξύ της εταιρικής υπευθυνότητας, της κοινωνικής ευθύνης και της εταιρικής διακυβέρνησης. Επικεντρώνεται στη σημασία της υιοθέτησης ενός μοντέλου ΕΚΕ από τις επιχειρίσεις, τους παράγοντες που την επηρεάζουν και την αλληλεπίδρασή της με τη Επιχειρηματική Στρατηγική. Θα γίνει μια αναφορά στην εταρική διακυβέρνηση στον Ελληνικό χώρο όπως αυτή θεσμοθετείται από το νέο νόμο 4706/2020. Η εργασία τέλος θα κλείσει με την εξέταση της εταιρικής υπευθυνότητας στον τομέα της ναυτιλίας λόγω των ιδιαιτέρων χαρακτηριστικών της και της βαρύτητας που έχει στην εθνική οικονομία.
Thompson's theorem for II_1 factors
Creators: name: Kennedy, Matthew
name: Skoufranis, Paul
Publisher: name: arXiv
Year: 2014
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46L10 (Primary), 15A42 (Secondary)

description: A theorem of Thompson provides a non-self-adjoint variant of the classical Schur-Horn theorem by characterizing the possible diagonal values of a matrix with given singular values. We prove an analogue of Thompson's theorem for II_1 factors.
description: 21 pages; minor changes
Entanglement and Expansion
Creators: name: Boutivas, Konstantinos
name: Pastras, Georgios
name: Tetradis, Nikolaos
Publisher: name: arXiv
Year: 2023
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We study the entanglement entropy resulting from tracing out local degrees of freedom of a quantum scalar field in an expanding universe. It is known that when field modes become superhorizon during inflation they evolve to increasingly squeezed states. We argue that this causes the entanglement entropy to grow continuously as successive modes cross the horizon. The resulting entropy is proportional to the total duration of inflation. It is preserved during a subsequent radiation or matter dominated era, and thus it may be relevant for today's universe. We demonstrate explicitly these features in a toy model of a scalar field in 1+1 dimensions.
description: 42 pages, 8 figures. v2: references added
A note on Low Energy Effective Theory of Chromo Natural Inflation in the light of BICEP2 results
Creators: name: Bhattacharjee, Anindita
name: Deshamukhya, Atri
name: Panda, Sudhakar
Publisher: name: arXiv
Year: 2014
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Recent result of BICEP2, revealing a larger value of tensor to scalar ratio (r), has opened up new investigations of the in ationary models to fit the experimental data. The experiment needs to reconfirm the results, specifically the consistency between Planck and BICEP2. On the other hand, the combined analysis of Planck and BICEP2 B, including the dust polarization uncertainty, brings down the upper limit on r. In this note, we reexamine the low energy effective theory of Chromo Natural In ation model and its generalization in view of such observational data. We find that the parameter space of the model admits a large value of r as well as other cosmological observables consistent with data.
description: Published version
Rumen-protected choline reduces hepatic lipidosis by increasing hepatic triacylglycerol-rich lipoprotein secretion in dairy cows
Creators: name: P. Santos, José Eduardo
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 300303
subject: Animal nutrition
classificationCode: 300999
subject: Veterinary sciences not elsewhere classified
classificationCode: 310103
subject: Cell metabolism

description: Supplemental tables for manuscript entitled "Rumen-protected choline reduces hepatic lipidosis by increasing hepatic triacylglycerol-rich lipoprotein secretion in dairy cows" published in the Journal of Dairy Science under DOI https://doi.org/10.3168/jds.2022-23182
Self-adjointness of the Gaffney Laplacian on vector bundles
Creators: name: Bandara, Lashi
name: Milatovic, Ognjen
Publisher: name: arXiv
Year: 2014
Subjects: subject: Functional Analysis (math.FA)
subject: Differential Geometry (math.DG)
subject: Spectral Theory (math.SP)
subject: FOS: Mathematics
subject: 58J60, 46E35, 46E40, 47F05

description: We study the Gaffney Laplacian on a vector bundle equipped with a compatible metric and connection over a Riemannian manifold that is possibly geodesically incomplete. Under the hypothesis that the Cauchy boundary is polar, we demonstrate the self-adjointness of this Laplacian. Furthermore, we show that negligible boundary is a necessary and sufficient condition for the self-adjointness of this operator.
description: Sharpened/strengthened Lemma 3.1, fixed typos, added some additional and relevant definitions to the preliminaries
title: "Othering" & Stereotype in Walt Disneys "Mulan"
Creators: name: Zöchling, Sarah
Year: 2022

description: Die vorliegende Arbeit setzt sich mit der Fragestellung auseinander, welche exemplarischen filmdidaktischen Möglichkeiten bestehen, um die beiden Filmversionen von Walt Disneys „Mulan“ in einen medien- und rassismuskritischen Deutschunterricht zu integrieren. Dieser Gegenstand orientiert sich an der Lebenswelt von Heranwachsenden und versucht deren Rezeptionsgewohnheiten nachzukommen. Obgleich es sich bei dem Medium Film um ein von Kindern und Jugendlichen vielrezipiertes handelt, erfährt dieses in der Fachdidaktik nicht die ihm gebührende Aufmerksamkeit. Daher sollen unter den Begriffen ,rassismuskritischer Unterricht‘ sowie ,Medienkritik‘ die didaktischen Angebote des ausgewählten Filmmaterials überprüft werden, um Überlegungen für ihren Einsatz im Deutschunterricht anzustellen. Das theoretische Gerüst, auf dem die Filmanalyse aufbaut, bilden die Konzepte Othering und Stereotypisierung, welche eine Auseinandersetzung mit diskriminierenden und rassistischen Praktiken nahelegen. Berücksichtigung finden hierbei neue Formen von Rassismus – in diesem Zusammenhang relevant ist in erster Linie antiasiatischer Rassismus – und in weiterer Folge intersektionale Ansätze. Grundlegend geht es bei der Analyse der Filme, für die unterschiedliche Parameter nach Mikos (2015) herangezogen werden, um die Aufdeckung und Reflexion von Macht- sowie Herrschaftsverhältnissen. Von Interesse ist zudem die Art und Weise, wie kulturelle Güter in den US-amerikanischen Filmen, in denen eine chinesische Geschichte erzählt wird, repräsentiert und an die (jungen) Zusehenden übermittelt werden. Im Fokus befinden sich die Analyse der Filmfiguren, ästhetische Elemente und der filmische Kontext, welche die entscheidenden Aspekte offenlegen. Die daraus gewonnenen Erkenntnisse werden beispielhaft für den Deutschunterricht nutzbar gemacht, um anhand sämtlicher Verfahren aus verschiedensten Kompetenzbereichen (Abraham, 2018) das Filmmaterial hinsichtlich diskriminierender Praktiken und binärer Schemata auf den Prüfstand zu stellen.
Primordial black hole isocurvature modes from non-Gaussianity
Creators: name: van Laak, Raphaël
name: Young, Sam
Publisher: name: arXiv
Year: 2023
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Primordial black holes (PBHs) are black holes that might have formed in high density regions in the early universe. The presence of local-type non-Gaussianity can lead to large-scale fluctuations in the PBH formation rate. If PBHs make up a non-negligible fraction of dark matter, these fluctuations can appear as isocurvature modes, and be used to constrain the amplitude of non-Gaussianity. Assuming that the parameters of non-Gaussianity are constant over all scales, we build upon the results of previous work by extending the calculation to include peaks theory and making use of the compaction $C$ for the formation criteria, accounting for non-linearities between $C$ and the curvature perturbation $ζ$. For quadratic models of non-Gaussianity, our updated calculation gives constraints that are largely unaltered compared to those previously found, while for cubic models the constraints worsen significantly. In case all of the DM is made up of PBHs, the parameters of non-Gaussianity are $-2.9\cdot10^{-4}
description: 23 pages, 7 figures
Laser under ultrastrong electromagnetic interaction with matter
Creators: name: Bamba, Motoaki
name: Ogawa, Tetsuo
Publisher: name: arXiv
Year: 2014
Subjects: subject: Quantum Physics (quant-ph)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The conventional picture of the light amplification by stimulated emission of radiation (laser) is broken under the ultrastrong interaction between the electromagnetic fields and matter, and distinct dynamics of the electric field and of the magnetic one make the "laser" qualitatively different from the conventional laser, which has been described simply without the distinction. The "laser" in the ultrastrong regime can show a rich variety of behaviors with spontaneous appearance of coherence. We found that the "laser" generally accompanies odd-order harmonics of the electromagnetic fields both inside and outside the cavity and a synchronization with an oscillation of atomic population. A bistability is also demonstrated in a simple model under two-level and single-mode approximations.
description: 12 pages, 7 figures
Maxwell's demon in biochemical signal transduction with feedback loop
Creators: name: Ito, Sosuke
name: Sagawa, Takahiro
Publisher: name: arXiv
Year: 2014
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Signal transduction in living cells is vital to maintain life itself, where information transfer in noisy environment plays a significant role. In a rather different context, the recent intensive researches of "Maxwell's demon" - a feedback controller that utilizes information of individual molecules - has led to a unified theory of information and thermodynamics. Here we combine these two streams of researches, and show that the second law of thermodynamics with information reveals the fundamental limit of the robustness of signal transduction against environmental fluctuations. Especially, we found that the degree of robustness is quantitatively characterized by an informational quantity called transfer entropy. Our information-thermodynamic approach is applicable to biological communication inside cells, in which there is no explicit channel coding in contrast to artificial communication. Our result would open up a novel biophysical approach to understand information processing in living systems on the basis of the fundamental information-thermodynamics link.
description: 21 pages, 12 figures
Tail dependence structure and extreme risk spillover effects between the international agricultural futures and spot markets
Creators: name: Dai, Yun-Shi
name: Dai, Peng-Fei
name: Zhou, Wei-Xing
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: This paper combines the Copula-CoVaR approach with the ARMA-GARCH-skewed Student-t model to investigate the tail dependence structure and extreme risk spillover effects between the international agricultural futures and spot markets, taking four main agricultural commodities, namely soybean, maize, wheat, and rice as examples. The empirical results indicate that the tail dependence structures for the four futures-spot pairs are quite different, and each of them exhibits a certain degree of asymmetry. In addition, the futures market for each agricultural commodity has significant and robust extreme downside and upside risk spillover effects on the spot market, and the downside risk spillover effects for both soybeans and maize are significantly stronger than their corresponding upside risk spillover effects, while there is no significant strength difference between the two risk spillover effects for wheat, and rice. This study provides a theoretical basis for strengthening global food cooperation and maintaining global food security, and has practical significance for investors to use agricultural commodities for risk management and portfolio optimization.
description: 37 pages, 7 figures
Graviton modes in multiply warped geometry
Creators: name: Arun, Mathew Thomas
name: Choudhury, Debajyoti
name: Das, Ashmita
name: SenGupta, Soumitra
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The negative results in the search for Kaluza-Klein graviton modes at the LHC, when confronted with the discovery of the Higgs, has been construed to have severely limited the efficacy of the Randall-Sundrum model as an explanation of the hierarchy problem. We show, though, that the presence of multiple warping offers a natural resolution of this conundrum through modifications in both the graviton spectrum and their couplings to the Standard Model fields.
description: 16 pages, 6 figures
Converging Periodic Boundary Conditions and Detection of Topological Gaps on Regular Hyperbolic Tessellations
Creators: name: Lux, Fabian R.
name: Prodan, Emil
Publisher: name: arXiv
Year: 2023
Subjects: subject: Mathematical Physics (math-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Group Theory (math.GR)
subject: Operator Algebras (math.OA)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: Tessellations of the hyperbolic spaces by regular polygons are becoming popular because they support discrete quantum and classical models displaying unique spectral and topological characteristics. Resolving the true bulk spectra and the thermodynamic response functions of these models requires converging periodic boundary conditions and our work delivers a practical solution for this open problem on generic {p,q}-tessellations. This enables us to identify the true spectral gaps of bulk Hamiltonians and, as an application, we construct all but one topological models that deliver the topological gaps predicted by the K-theory of the lattices. We demonstrate the emergence of the expected topological spectral flows whenever two such bulk models are deformed into each other and, additionally, we prove the emergence of topological channels whenever a soft physical interface is created between different topological classes of Hamiltonians.
Exact theory of freeze out
Creators: name: Cannoni, Mirco
Publisher: name: arXiv
Year: 2014
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We show that the standard theory of thermal production and chemical decoupling of WIMPs is incomplete. The hypothesis that WIMPs are produced and decouple from a thermal bath implies that the rate equation the bath particles interacting with the WIMPs is an algebraic equation that constraints the actual WIMPs abundance to have a precise analytical form down to the temperature $x_\ast=m_χ/T_\ast$. The point $x_\ast$, which coincides with the stationary point of the equation for the quantity $Δ= Y-Y_0$, is where the maximum departure of the WIMPs abundance $Y$ from the thermal value $Y_0$ is reached. For each mass $m_χ$ and total annihilation cross section $\langle σ_\text{ann}v_\text{r}\rangle$, the temperature $x_\ast$ and the actual WIMPs abundance $Y(x_\ast)$ are exactly known. This value provides the true initial condition for the usual differential equation that have to be integrated in the interval $x\ge x_\ast$. The matching of the two abundances at $x_\ast$ is continuous and differentiable. The dependence of the present relic abundance on the abundance at an intermediate temperature is an exact result. The exact theory suggests a new analytical approximation that furnishes the relic abundance accurate at the level of $1\%-2\%$ in the case of $S$-wave and $P$-wave scattering cross sections. We conclude the paper studying the evolution of the WIMPs chemical potential and the entropy production using methods of non equilibrium thermodynamics.
description: 10 pages, 2 figure: V3 similar to the published version in EPJ C
Metal-Insulator Transition and Lattice Instability of Paramagnetic V2O3
Creators: name: Leonov, I.
name: Anisimov, V. I.
name: Vollhardt, D.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We determine the electronic structure and phase stability of paramagnetic V$_2$O$_3$ at the Mott-Hubbard metal-insulator phase transition, by employing a combination of an ab initio method for calculating band structures with dynamical mean-field theory. The structural transformation associated with the metal-insulator transition is found to occur upon a slight expansion of the lattice volume by $\sim 1.5$ %, in agreement with experiment. Our results show that the structural change precedes the metal-insulator transition, implying a complex interplay between electronic and lattice degrees of freedom at the transition. Electronic correlations and full charge self-consistency are found to be crucial for a correct description of the properties of V$_2$O$_3$.
description: 5 pages, 4 figures
Verborrea
Creators: name: Criales Cárdenas Diana Patricia
Publisher: name: Universidad del Rosario
Year: 2022

description: Recurso audiovisual del mooc Corrección de textos jurídicos en el cual se explica en qué consiste la verborrea como vicio que se tiene en la redacción de textos y cómo esta afecta los procesos de comunicación efectiva.