cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Koopmans' theorem as the mechanism of nearly gapless surface states in self-doped magnetic topological insulators
Creators: name: Chen, Weizhao
name: Zhao, Yufei
name: Yao, Qiushi
name: Zhang, Jing
name: Liu, Qihang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: The magnetization-induced gap at the surface state is widely believed as the kernel of magnetic topological insulators (MTIs) because of its relevance to various topological phenomena, such as the quantum anomalous Hall effect and the axion insulator phase. However, if the magnetic gap exists in an intrinsic MTI, such as MnBi$_{2}$Te$_{4}$, still remains elusive, with significant discrepancies between theoretical predictions and various experimental observations. Here, including the previously overlooked self-doping in real MTIs, we find that in general a doped MTI prefers a ground state with a gapless surface state. We use a simple model based on Koopmans' theorem to elucidate the mechanism and further demonstrated it in self-doped MnBi$_{2}$Te$_{4}$/(Bi$_{2}$Te$_{3}$)$_{n}$ family through first-principles calculations. Our work shed light on the design principles of MTIs with magnetic gaps by revealing the critical role of doping effects in understanding the delicate interplay between magnetism and topology.
description: 6 pages, 4 figures
Enhancing case tool support for analysis through formal logic utilities
Creators: name: Borm, Eric A.
Publisher: name: University of British Columbia
Year: 2009

description: Most support for analysis provided by current CASE (Computer Aided Software Engi neering) tools is complementary to the support provided by the tools being used to sup port formal methods; therefore, in order to provide more substantial support for analysis, CASE tools should be integrated with general purpose formal logic utilities, the tools of formal methods. Modern CASE tools are the product of many years of experience with developing software systems and provide a great deal of assistance with overcoming the organizational barriers to constructing large software systems. Unfortunately, the tools do not reflect the skills required to overcome the cognitive barriers faced by software engineers. Techniques of formal analysis provide solutions to overcoming some of those cognitive barriers. These techniques are based on formal logic and can only be applied within methodologies which make use of mathematically defined specification languages (i.e., formal methods). Computer assistance can be provided for these techniques of formal analysis through utilities which support formal logic such as model checkers and theorem provers. This dissertation proposes to combine the functionality of traditional CASE tools with utilities of formal logic. In support of this, a theorem prover for the formal logic, NaDSet, has been implemented in the commercial CASE tool, the Software Refinery.
พัฒนาการนาฏกรรมจากโบราณคติ
Creators: name: วิกรม กรุงแก้ว, อนุกูล โรจนสุขสมบูรณ์
Publisher: name: สำนักวิทยบริการ มหาวิทยาลัยสงขลานครินทร์ วิทยาเขตปัตตานี
Year: 2019
Subjects: พัฒนาการ, นาฏกรรม, โบราณคติ, development, performance, folklore

description: วารสารวิทยบริการ มหาวิทยาลัยสงขลานครินทร์, 30, 2, 165-176
Numerical tools for the theoretical study of QCD at small x
Creators: name: Vera, A. Sabio
name: Stephens, P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this contribution we present the status of two numerical tools designed to study the small x limit of QCD. The first one is a Monte Carlo simulation of the BFKL evolution equation. In design of this approach emphasis has been placed on exploiting the linear behaviour that many variants of the BFKL evolution possess. This allows us to design a procedure which can be used to study theoretical and phenomenological aspects of different kernels. The second one is a semi-analytic approach to study Lipatov's effective action which describes Reggeon interactions. The study of the properties of this action is very complicated and we propose using a computational tool to handle the large amount of non--local vertices and the derivation of higher order corrections.
description: 7 pages, 3 figures. International Workshop on Diffraction in High-Energy Physics -DIFFRACTION 2006 - September 5-10 2006 Adamantas, Milos island, Greece
Financial Characteristics of U.S. Farms, January 1, 1989
Creators: name: Morehart, Mitchell J.
name: Johnson, James D.
name: Banker, David E.
name: Morehart, Mitchell J.
name: Johnson, James D.
name: Banker, David E.
Publisher: name: Unknown
Year: 1989
Subjects: subject: Agricultural Finance
subject: Consumer/Household Economics
subject: Financial Economics
subject: Assets
subject: balance sheet
subject: cash-flow
subject: debt
subject: economic class
subject: Farm Costs and Returns Survey
subject: financial stress
subject: production specialty
subject: region
subject: financial characteristics

description: Despite the 1988 drought, the overall financial conditions of farmers and ranchers remained similar to those in 1987. On average, net farm income (profitability) and net cash farm income rose slightly, but fewer farms had positive incomes. More farms had no outstanding liabilities, and fewer farms had debt/asset ratios (solvency) above 0.40. This report provides a detailed analysis of farm financial performance based on the latest information from the Farm Costs and Returns Survey (FCRS).
School of hard knocks: Curriculum analysis for Pommerman with a fixed computational budget
Creators: name: Shelke, Omkar
name: Meisheri, Hardik
name: Khadilkar, Harshad
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Machine Learning (cs.LG)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: Pommerman is a hybrid cooperative/adversarial multi-agent environment, with challenging characteristics in terms of partial observability, limited or no communication, sparse and delayed rewards, and restrictive computational time limits. This makes it a challenging environment for reinforcement learning (RL) approaches. In this paper, we focus on developing a curriculum for learning a robust and promising policy in a constrained computational budget of 100,000 games, starting from a fixed base policy (which is itself trained to imitate a noisy expert policy). All RL algorithms starting from the base policy use vanilla proximal-policy optimization (PPO) with the same reward function, and the only difference between their training is the mix and sequence of opponent policies. One expects that beginning training with simpler opponents and then gradually increasing the opponent difficulty will facilitate faster learning, leading to more robust policies compared against a baseline where all available opponent policies are introduced from the start. We test this hypothesis and show that within constrained computational budgets, it is in fact better to "learn in the school of hard knocks", i.e., against all available opponent policies nearly from the start. We also include ablation studies where we study the effect of modifying the base environment properties of ammo and bomb blast strength on the agent performance.
description: 8 pages, Submitted to ALA workshop 2021
Freezing effects in the two dimensional one-component plasma and in thin film type II superconductors
Creators: name: McClarty, P. A.
name: Moore, M. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present results of Monte Carlo simulations of the two dimensional one-component plasma and of the Ginzberg-Landau model in the lowest Landau level approximation, with both charges and vortices respectively confined within a disc. In both models we see that as the temperature is reduced, oscillations in the radial density develop which spread into the bulk from the edge of the disc. The amplitude of these oscillations grows as the temperature is lowered and the length scale over which the oscillations occurs is the same as the correlation length for local crystalline order at that temperature. At temperatures similar to those where earlier studies have reported a first-order fluid-crystal phase transition, the correlation length is comparable to the linear dimensions of the samples studied, which suggests that finite size effects will be affecting the accuracy of their conclusions.
description: 4 pages, 4 figures. Submitted to Physical Review B
Applications of Skyrme energy-density functional to fusion reactions for synthesis of superheavy nuclei
Creators: name: Wang, Ning
name: Wu, Xizhen
name: Li, Zhuxia
name: Liu, Min
name: Scheid, Werner
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The Skyrme energy-density functional approach has been extended to study the massive heavy-ion fusion reactions. Based on the potential barrier obtained and the parameterized barrier distribution the fusion (capture) excitation functions of a lot of heavy-ion fusion reactions are studied systematically. The average deviations of fusion cross sections at energies near and above the barriers from experimental data are less than 0.05 for 92% of 76 fusion reactions with $Z_1Z_2<1200$. For the massive fusion reactions, for example, the $^{238}$U-induced reactions and $^{48}$Ca+$^{208}$Pb the capture excitation functions have been reproduced remarkable well. The influence of structure effects in the reaction partners on the capture cross sections are studied with our parameterized barrier distribution. Through comparing the reactions induced by double-magic nucleus $^{48}$Ca and by $^{32}$S and $^{35}$Cl, the 'threshold-like' behavior in the capture excitation function for $^{48}$Ca induced reactions is explored and an optimal balance between the capture cross section and the excitation energy of the compound nucleus is studied. Finally, the fusion reactions with $^{36}$S, $^{37}$Cl, $^{48}$Ca and $^{50}$Ti bombarding on $^{248}$Cm, $^{247,249}$Bk, $^{250,252,254}$Cf and $^{252,254}$Es, and as well as the reactions lead to the same compound nucleus with Z=120 and N=182 are studied further. The calculation results for these reactions are useful for searching for the optimal fusion configuration and suitable incident energy in the synthesis of superheavy nuclei.
description: 24 pages, 10 figures, 3 tables, accepted by Phys.Rev.C
title: Renato Guarini. Tra sapere e organizzazione del sapere
Creators: name: De Lauro, Pier Luigi
name: Zelli, Roberto
Publisher: name: Sapienza Università Editrice
Year: 2022

description: Un libro per i 90 anni di Renato Guarini. Il modo migliore per festeggiare un traguardo importante. Non è una biografia ma un modo per raccontare, e per far raccontare da chi ha lavorato con lui, da chi gli è amico, il suo lungo impegno scientifico e professionale prima all’Istat e poi nella sua amata università, La Sapienza, dove è stato a lungo preside della facoltà di Scienze statistiche e ha ricoperto il più alto incarico di rettore, concludendo con una sua dichiarazione d’amore per Napoli, la sua città. Una coinvolgente narrazione “tra sapere e organizzazione del sapere”.

Prefazione di Antonella Polimeni, Rettrice della Sapienza Università di Roma.
Nuclear excitation by electron capture followed by fast x-ray emission
Creators: name: Pálffy, Adriana
name: Harman, Zoltán
name: Kozhuharov, Christophor
name: Brandau, Carsten
name: Keitel, Christoph H.
name: Scheid, Werner
name: Stöhlker, Thomas
Publisher: name: arXiv
Year: 2008
Subjects: subject: Nuclear Theory (nucl-th)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The resonance strength of the two-step process of nuclear excitation by electron capture followed by $γ$ decay of the nucleus can be significantly increased in highly charged ions if the resonant capture proceeds via an excited electronic state with subsequent fast x-ray emission. For fully ionized $^{238}_{92}\mathrm{U}$ and $^{232}_{90}\mathrm{Th}$, the {x-ray} decay stabilizes the system against internal conversion of the captured electron, with an increase of both nuclear lifetimes and resonance strengths of up to two orders of magnitude compared with the case when occupied atomic orbitals prevent the x-ray de-excitation. Applications of this effect to the measurement of the not yet experimentally observed nuclear excitation by electron capture and to dense astrophysical plasmas are discussed.
description: 12 pages, 1 figure, 2 tables
Abstraction and search for decision-theoretic planning
Creators: name: Dearden, Richard William
Publisher: name: University of British Columbia
Year: 2009

description: We investigate the use Markov Decision Processes a.s a means of representing worlds in which actions have probabilistic effects. Markov Decision Processes provide many representational advantages over traditional planning representations. As well as being able to represent actions with more than one possible result, they also provide a much richer way to represent good and bad states of the world. Conventional approaches for finding optimal plans for Markov Decision Processes are computationally expensive and generally impractical for the large domains and real-time requirements of many planning applications. For this reason, we have concentrated on producing approximately optimal plans using a minimal amount of computation. We describe two complementary methods for planning. The first is to generate ap proximately optimal plans using abstraction. By ignoring certain features of a planning problem, we can create a smaller problem for which an optimal plan can be efficiently found by conventional means. The plan for this smaller problem can be directly applied to the original problem, and also provides an estimate of the value of each possible state of the world. Our second technique uses these estimates as a heuristic, and applies game tree search techniques to try to determine a better action to perform in the current state of the system. By repeatedly choosing an action to perform by searching, and executing the action, we provide a planning algorithm which has a complexity that is independent of the number of possible states of the world.
D2.3 System Requirements Specification
Creators: name: Filip, Aleš; Holík, Filip; Neri, Alessandro; Salvitti, Maurizio; Dionisio, Cesare; Xefteris, Panagiotis; Salvatori, Pietro; Capua, Roberto; Gattuso, Luca; Innoccenti, Manuele; Giangolini, Marco; Grosch, Anja; Crespillo, Omar Garcia; Zhu, Chen; Kutik, Ondrej; Krajíček, Miroslav; Loupis, Michael; Spanoudakis, John
Publisher: name: Zenodo
Year: 2020
Subjects: Multimodal
AIMN

description: This is part of H2020 HELMET Project
Rigorous bounds on the Analytic $S$-matrix
Creators: name: Guerrieri, Andrea
name: Sever, Amit
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider a dual $S$-matrix Bootstrap approach in $d\geq 3$ space-time dimensions which relies solely on the rigorously proven analyticity, crossing, and unitarity properties of the scattering amplitudes. As a proof of principle, we provide rigorous upper and lower numerical bounds on the quartic coupling for the scattering of identical scalar particles in four dimensions.
description: 5 + 10 pages, 3 + 6 figures, major revision in the appendices, improved numerics, typos corrected
Deep Learning Approach for Singer Voice Classification of Vietnamese Popular Music
Creators: name: Van, Toan Pham
name: Tran, Ngoc N.
name: Thanh, Ta Minh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Sound (cs.SD)
subject: Machine Learning (cs.LG)
subject: Audio and Speech Processing (eess.AS)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Singer voice classification is a meaningful task in the digital era. With a huge number of songs today, identifying a singer is very helpful for music information retrieval, music properties indexing, and so on. In this paper, we propose a new method to identify the singer's name based on analysis of Vietnamese popular music. We employ the use of vocal segment detection and singing voice separation as the pre-processing steps. The purpose of these steps is to extract the singer's voice from the mixture sound. In order to build a singer classifier, we propose a neural network architecture working with Mel Frequency Cepstral Coefficient as extracted input features from said vocal. To verify the accuracy of our methods, we evaluate on a dataset of 300 Vietnamese songs from 18 famous singers. We achieve an accuracy of 92.84% with 5-fold stratified cross-validation, the best result compared to other methods on the same data set.
description: Published in SoICT 2019: Proceedings of the Tenth International Symposium on Information and Communication Technology
Determining neutrino properties using future galaxy redshift surveys
Creators: name: Abdalla, F. B.
name: Rawlings, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Current measurements of the large-scale structure of galaxies are able to place an $\sim 0.5 ~ \rm eV$ upper limit on the absolute mass scale of neutrinos. An order-of-magnitude improvement in raw sensitivity, together with an insensitivity to systematic effects, is needed to reach the lowest value allowed by particle physics experiments. We consider the prospects of determining both the neutrino mass scale and the number of of massive neutrinos using future redshift surveys, specifically those undertaken with the Square Kilometre Array (SKA), with and without additional constraints from the upcoming Planck CMB experiment. If the sum of the neutrino masses $\sum m_i \gtsimeq 0.25 ~ \rm eV$ then the imprint of neutrinos on large-scale structure (LSS) should be enough, on its own, to establish the neutrino mass scale and, considered alongside CMB constraints, it will also determine the number of massive neutrinos $N_ν$, and hence the mass hierarchy. If $\sum m_i \sim 0.05 ~ \rm eV$, at the bottom end of the allowed range, then a combination of LSS, CMB and particle physics constraints should be able to determine $\sum m_i$, $N_ν$ and the hierarchy. If $\sum m_i$ is in the specific range $0.1-0.25 ~ \rm eV$, then a combination of LSS, CMB and particle physics experiments should determine $\sum m_i$, but not $N_ν$ or the hierarchy. Once an SKA-like LSS survey is available there are good prospects of obtaining a full understanding of the conventional neutrino sector, and a chance of finding evidence for sterile neutrinos.
description: 18 pages accepted by MNRAS
Πολιτική αγωγή: η σχέση αστικής και ποινικής δίκης, ιδίως από την άποψη του δεδικασμένου
Creators: name: Ζαννέτου, Χριστίνα Ιάκωβου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Πολιτική Αγωγή
Δεδικασμένο
66 και 67 ΚΠΔ
Civil Party
Res Judicata
66 and 67 CCP

description: Θεματικό αντικείμενο της παρούσας διπλωματικής εργασίας αποτελεί ο θεσμός της πολιτικής αγωγής κατά τα άρθρα 66 και 67 ΚΠΔ, όπου ρυθμίζεται η παράλληλη δικαιοδοσία αστικών και ποινικών δικαστηρίων σε περίπτωση δικαστικής επιδιώξεως αποζημίωσης, τόσο με τη μορφή της πολιτικής αγωγής στο ποινικό δικαστήριο όσο και με τη μορφή αγωγής στο πολιτικό δικαστήριο. Για την ερμηνευτική προσέγγιση του ως άνω κανονιστικού πλαισίου θεωρήθηκε κρίσιμη η ανάλυσή του σε δύο κύριες θεματικές με κριτήριο τη διατύπωση επιφύλαξης. Συγκεκριμένα, το δεύτερο κεφάλαιο της παρούσας διπλωματικής εργασίας πραγματεύεται τη δικαστική επιδίωξη των απαιτήσεων χωρίς τη διατύπωση επιφύλαξης, όπου αναλύεται αφενός η εισαγωγή των αστικής φύσεως αξιώσεων στην πολιτική διαδικασία μετά την επιδίωξή τους στο ποινικό δικαστήριο αφετέρου η εισαγωγή των ως άνω αξιώσεων στην ποινική διαδικασία, ενώ έχουν ήδη εγερθεί ενώπιον πολιτικού δικαστηρίου. Ακολούθως, στο τρίτο κεφάλαιο εξετάζεται η δικαστική επιδίωξη των απαιτήσεων με τη διατύπωση επιφύλαξης, όπου παρουσιάζονται τα αποτελέσματα της επιφύλαξης καθώς και το ζήτημα της απόρριψης των αστικής φύσεως απαιτήσεων. Τέλος, θα πρέπει να επισημανθεί ότι, για τους σκοπούς της παρούσας μελέτης, η δικονομική προσέγγιση του θεσμού της πολιτικής αγωγής έγινε με σημείο αναφοράς τον θεσμό του δεδικασμένου
description: The topic of this thesis is the institution of civil party pursuant to Articles 66 and 67 CCP (Code of Criminal Procedure), which regulate the parallel jurisdiction of civil and criminal courts in case of judicial claim for compensation both under the form of civil action before the criminal court and under the form of lawsuit brought before the civil court. In order to approach the above regulatory framework through an interpretive aspect, it was considered crucial to analyze it in two main chapters based on the criterion of expressing a reservation. Specifically, the second chapter of this thesis deals with the defendant’s claims for civil damages without expressing a reservation. It examines on the one hand the introduction of civil law claims in the civil proceedings after being brought before the criminal court and on the other hand the introduction of the above claims in criminal proceedings while they have already been brought before a civil court. The third chapter focuses on the judicial pursuit of claims when reservation has been expressed and it presents the effects of the reservation along with the issue of rejection of civil claims. Finally, it should be noted that for the purposes of this study, the procedural approach of the institution of civil party was realized with reference to the rule of court precedent (res judicata)
Liberating Confinement from Lagrangians: 1-form Symmetries and Lines in 4d N=1 from 6d N=(2,0)
Creators: name: Bhardwaj, Lakshya
name: Hubner, Max
name: Schafer-Nameki, Sakura
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study confinement in 4d N=1 theories obtained by deforming 4d N=2 theories of Class S. We argue that confinement in a vacuum of the N=1 theory is encoded in the 1-cycles of the associated N=1 curve. This curve is the spectral cover associated to a generalized Hitchin system describing the profiles of two Higgs fields over the Riemann surface upon which the 6d (2,0) theory is compactified. Using our method, we reproduce the expected properties of confinement in various classic examples, such as 4d N=1 pure Super-Yang-Mills theory and the Cachazo-Seiberg-Witten setup. More generally, this work can be viewed as providing tools for probing confinement in non-Lagrangian N=1 theories, which we illustrate by constructing an infinite class of non-Lagrangian N=1 theories that contain confining vacua. The simplest model in this class is an N=1 deformation of the N=2 theory obtained by gauging $SU(3)^3$ flavor symmetry of the $E_6$ Minahan-Nemeschansky theory.
description: 86 pages, many tikz figures, v2: references added
Οι επιλογές offshoring και outsourcing μίας επιχείρησης σε μία ατελώς ανταγωνιστική αγορά: μία στρατηγική προσέγγιση
Creators: name: Τέγου, Μαρία Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: Μετεγκατάσταση παραγωγής
Εξωτερική ανάθεση παραγωγής
Offshoring
Outsourcing

description: Σκοπός της διατριβής ήταν η ανάδειξη της επιλογής μίας στρατηγικής επιχείρησης μεταξύ offshoring και outsourcing. Αρχικά αναλύεται η σημασία του offshoring (ή μετεγκατάστασης επιχειρηματικών δραστηριοτήτων), παρουσιάζεται μία σύντομη ιστορική αναδρομή, πιθανά οφέλη και κίνδυνοι που μπορεί να προκύψουν από την επιλογή αυτή, και έπειτα κατηγορίες που συναντάμε στη βιβλιογραφία . Εν συνεχεία γίνεται η αντίστοιχη παρουσίαση του outsourcing (ή εξωτερικής ανάθεσης παραγωγής), και τέλος κατασκευάζεται ένα θεωρητικό υπόδειγμα δύο επιχειρήσεων που στόχο έχει να μας καταδείξει τη στρατηγική επιλογή των επιχειρήσεων ανάμεσα στα δύο. Πρόκειται για ένα παίγνιο με δύο επιχειρήσεις/παίκτες που καλούνται να επιλέξουν ανάμεσα στο offshoring και το outsourcing. Τι επιλέγουν τελικά οι επιχειρήσεις και ποιά είναι τα κριτήρια για τη λήψη της απόφασης τους; Αυτό που θα που διαπιστώσουμε από την έρευνα μας είναι ότι η επιλογή ανάμεσα στο offshoring και outsourcing είναι μία επιλογή, η οποία επηρεάζεται ξεκάθαρα από τη στρατηγική απόφαση της ανταγωνίστριας επιχείρησης, και το αποτέλεσμα μπορεί να προκύψει μόνο υπό συνθήκη και βάσει συγκεκριμένων περιορισμών
description: The aim of the present thesis was to highlight the selection of a business strategy between offshoring and outsourcing. Initially, we analyze the meaning of offshoring (business relocation), then we present a brief chronology of offshoring and some potential benefits and risks that may arise from this option, and then we present the categories of offshoring. Correspondingly follows the presentation of outsourcing (or external production assignment), and finally we have constructed a theoretical model that consists of two enterprises aiming to demonstrate the strategic choice of business between their two options. This is a game with two companies / players who are invited to choose between offshoring and outsourcing. What do the companies ultimately choose, and what are the criteria for making their decision? The final result that occurs from our research is that the choice between offshoring and outsourcing is an option, which is clearly influenced by the strategic decision of the rival enterprise, and the result may only occur under some possible treaties and under certain restrictions
Phases saturation control on mixing driven reactions in 3D porous media
Creators: name: Markale, Ishaan
name: Cimmarusti, Gabriele M.
name: Britton, Melanie M.
name: Jimenez-Martinez, Joaquin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Transported chemical reactions in unsaturated porous media are relevant across a range of environmental and industrial applications. Continuum scale dispersive models are often based on equivalent parameters derived from analogy with saturated conditions, and cannot appropriately account for processes such as incomplete mixing. It is also unclear how the third dimension controls mixing and reactions in unsaturated conditions. We obtain 3$D$ experimental images of the phases distribution and of transported chemical reaction by Magnetic Resonance Imaging (MRI) using an immiscible non-wetting liquid as a second phase and a fast irreversible bimolecular reaction. Keeping the Péclet number (Pe) constant, we study the impact of phases saturation on the dynamics of mixing and the reaction front. By measuring the local concentration of the reaction product, we quantify temporally resolved effective reaction rate ($R$). We describe the temporal evolution of $R$ using the lamellar theory of mixing, which explains faster than Fickian ($t^{0.5}$) rate of product formation by accounting for the deformation of mixing interface between the two reacting fluids. For a given Pe, although stretching and folding of the reactive front are enhanced as saturation decreases, enhancing the product formation, this is larger as saturation increases, i.e., volume controlled. After breakthrough, the extinction of the reaction takes longer as saturation decreases because of the larger non-mixed volume behind the front. These results are the basis for a general model to better predict reactive transport in unsaturated porous media not achievable by the current continuum paradigm.
Discontinuous Molecular Dynamics for Rigid Bodies: Applications
Creators: name: de la Pena, Lisandro Hernandez
name: van Zon, Ramses
name: Schofield, Jeremy
name: Opps, Sheldon B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Event-driven molecular dynamics simulations are carried out on two rigid body systems which differ in the symmetry of their molecular mass distributions. First, simulations of methane in which the molecules interact via discontinuous potentials are compared with simulations in which the molecules interact through standard continuous Lennard-Jones potentials. It is shown that under similar conditions of temperature and pressure, the rigid discontinuous molecular dynamics method reproduces the essential dynamical and structural features found in continuous-potential simulations at both gas and liquid densities. Moreover, the discontinuous molecular dynamics approach is demonstrated to be between 2 to 100 times more efficient than the standard molecular dynamics method depending on the specific conditions of the simulation. The rigid discontinuous molecular dynamics method is also applied to a discontinuous-potential model of a liquid composed of rigid benzene molecules, and equilibrium and dynamical properties are shown to be in qualitative agreement with more detailed continuous-potential models of benzene. Qualitative differences in the dynamics of the two models are related to the relatively crude treatment of variations in the repulsive interactions as one benzene molecule rotates by another.
description: 14 pages, double column revtex
Formation of colloidal threads in geometrically varying flow-focusing channels
Creators: name: Gowda, V. Krishne
name: Rydefalk, Cecilia
name: Söderberg, L. Daniel
name: Lundell, Fredrik
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: When two miscible fluids are brought into contact with each other, the concentration gradients induce stresses. These are referred to as Korteweg stresses and are analogous to interfacial tension between two immiscible fluids, thereby acting as an effective interfacial tension (EIT) in inhomogeneous miscible systems. EIT governs the formation of a viscous thread in flow-focusing of two miscible fluids. To further investigate its significance, we have studied thread formation of a colloidal dispersion focused by its own solvent. Experiments are combined with three-dimensional numerical models to systematically expand previous knowledge utilising different flow-focusing channel setups. In the reference setup, the sheath flows impinge the core flow orthogonally while in four other channel setups, the sheath flows impinge the core flow at an oblique angle that is both positive and negative with respect to the reference sheath direction. As an initial estimate of the EIT, we fit the experimentally determined thread shape in the reference setup to a master curve that depends on EIT through an effective capillary number. By numerically reproducing these experimental results, it is concluded that the estimated EIT is within 25% of the optimal EIT value that can be deduced by iteratively fitting the numerical results to the experimental measurements. Regardless of channel setups, further numerical calculations performed using the optimal EIT evaluated from the reference setup show good agreement with the experimental findings in terms of thread shapes, wetted region morphologies, and velocity flow fields. The one-to-one comparison of numerical and experimental findings unveil the crucial role of EIT on the thread detachment from the top and bottom walls of the channel, bringing useful insights to understand the physical phenomenons involved in miscible systems with a high-viscosity contrast.
description: 23 pages, 12 figures
D2.2 HELMET CONOPS
Creators: name: Filip, Aleš; Holík, Filip; Neri, Alessandro; Salvitti, Maurizio; Xefteris, Panagiotis; Dionisio, Cesare; Salavatori, Pietro; Capua, Roberto; Gattuso, Luca; Innoccente, Manuele; Crespillo, Omar Garcia; Kutik, Ondrej; Loupis, Michael
Publisher: name: Zenodo
Year: 2020
Subjects: Multimodal
AIMN

description: This is part of H2020 HELMET Project
Magnetically Induced Thermal Rectification
Creators: name: Casati, Giulio
name: Mejia-Monasterio, Carlos
name: Prosen, Tomaz
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider far from equilibrium heat transport in chaotic billiard chains with non-interacting charged particles in the presence of non-uniform transverse magnetic field. If half of the chain is placed in a strong magnetic field, or if the strength of the magnetic field has a large gradient along the chain, heat current is shown to be asymmetric with respect to exchange of the temperatures of the heat baths. Thermal rectification factor can be arbitrarily large for sufficiently small temperature of one of the baths.
description: 4 pages, 5 figures
D3.2_Functional_Design_Document
Creators: name: Crespillo. Garcia Omar; Grosh, Anja; Fehr, Matthias; Zhu, Chen; Neri, Alessandro; Salvitti, Maurizio; Dionisio, Cesare; Xefteris, Panagiotis; Salvatori, Pietro; Capua, Roberto; Gattuso. Luca; Innocenti, Manuele; Giangolini, Marco; Kutik, Ondrej; Krajicek, Miroslav; Loupis, Michael; Spanoudakis, John
Publisher: name: Zenodo
Year: 2020
Subjects: Multimodal
AIMN

description: This is part of H2020 HELMET Project
Phantom without UV pathology
Creators: name: Rubakov, V. A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a simple model in which the weak energy condition is violated for spatially homogeneous, slowly evolving fields. The excitations about Lorentz-violating background in Minkowski space do not contain ghosts, tachyons or superluminal modes at spatial momenta ranging from some low scale epsilon to the UV cutoff scale, while tachyons and possibly ghosts do exist at p^2 < epsilon^2. We show that in the absence of other matter, slow roll cosmological regime is possible; in this regime p+rho<0, and yet homogeneity and isotropy are not completely spoiled (at the expence of fine-tuning), since for given conformal momentum, the tachyon mode grows for short enough period of time.
description: 19 pages. Several misprints corrected, several points clarified, several references added
Structural constraints in complex networks
Creators: name: Zhou, Shi
name: Mondragon, Raul J.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: We present a link rewiring mechanism to produce surrogates of a network where both the degree distribution and the rich--club connectivity are preserved. We consider three real networks, the AS--Internet, the protein interaction and the scientific collaboration. We show that for a given degree distribution, the rich--club connectivity is sensitive to the degree--degree correlation, and on the other hand the degree--degree correlation is constrained by the rich--club connectivity. In particular, in the case of the Internet, the assortative coefficient is always negative and a minor change in its value can reverse the network's rich--club structure completely; while fixing the degree distribution and the rich--club connectivity restricts the assortative coefficient to such a narrow range, that a reasonable model of the Internet can be produced by considering mainly the degree distribution and the rich--club connectivity. We also comment on the suitability of using the maximal random network as a null model to assess the rich--club connectivity in real networks.
description: To appear in New Journal of Physics (www.njp.org)
Geometrical constraints on curvature from galaxy-lensing cross-correlations
Creators: name: Zhang, Yufei
name: Fang, Wenjuan
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Accurate constraints on curvature provide a powerful probe of inflation. However, curvature constraints based on specific assumptions of dark energy may lead to unreliable conclusions when used to test inflation models. To avoid this, it is important to obtain constraints that are independent on assumptions for dark energy. In this paper, we investigate such constraints on curvature from the geometrical probe constructed from galaxy-lensing cross-correlations. We study comprehensively the cross-correlations of galaxy with magnification, measured from type Ia supernovae's brightnesses ("$gκ^{\rm SN}$"), with shear ("$gκ^{\rm g}$"), and with CMB lensing ("$gκ^{\rm CMB}$"). We find for the LSST and Stage IV CMB surveys, "$gκ^{\rm SN}$" , "$gκ^{\rm g}$" and "$gκ^{\rm CMB}$" can be detected with signal-to-noise ratio $S/N=104,\ 2291,\ 1842$ respectively. When combined with supernovae Hubble diagram ("SN") to constrain curvature, we find galaxy-lensing cross-correlation becomes increasingly important with more degrees of freedom allowed in dark energy. Without any priors, we obtain error on $Ω_K$ of $0.723$ from "SN + $gκ^{\rm SN}$", $0.0417$ from "SN + $gκ^{\rm g}$", and $0.04$ from "SN + $gκ^{\rm g}$ + $gκ^{\rm CMB}$" for the LSST and Stage IV CMB surveys. The last one is more competitive than a Stage IV BAO survey ("BAO"). When galaxy-lensing cross-correlations are added to the combined probe of "SN + BAO + CMB", where "CMB" stands for Planck measurement for the CMB acoustic scale, we obtain constraint on $Ω_K$ of $0.0013$, which is a factor of 7 improvement from "SN + BAO + CMB". We study improvements in these results from increasing the high redshift extension of supernovae.
description: 13 pages, 4 figures, 3 tables, minor modifications reflect PRD accepted version
Statistical complexity, Fisher-Shannon information, and Bohr orbits in the H-atom
Creators: name: Sanudo, Jaime
name: Lopez-Ruiz, Ricardo
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Mathematical Physics (math-ph)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The Fisher-Shannon information and a statistical measure of complexity are calculated in the position and momentum spaces for the wave functions of the H-atom. For each level of energy, it is found that these two indicators take their minimum values on the orbitals that correspond to the classical (circular) orbits in the Bohr atomic model, just those with the highest orbital angular momentum.
description: 7 pages, 2 figures
Quantum theory of dynamic multiple light scattering
Creators: name: Skipetrov, S. E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We formulate a quantum theory of dynamic multiple light scattering in fluctuating disordered media and calculate the fluctuation and the autocorrelation function of photon number operator for light transmitted through a disordered slab. The effect of disorder on the information capacity of a quantum communication channel operating in a disordered environment is estimated and the use of squeezed light in diffusing-wave spectroscopy is discussed.
description: Revised text, additional figure
Reinforcement learning using the game of soccer
Creators: name: Ford, Roger David
Publisher: name: University of British Columbia
Year: 2009

description: Trial and error learning methods are often ineffective when applied to robots. This is due to certain characteristics found in robotic domains such as large continuous state spaces, noisy sensors and faulty actuators. Learning algorithms work best with small discrete state spaces, discrete deterministic actions, and accurate identification of state. Since trial and error learning requires that an agent learn by trying actions under all possible situations, the large continuous state space is the most problematic of the above characteristics, causing the learning algorithm to become inefficient. There is rarely enough time to explicitly visit every state or enough memory to store the best action for every state. This thesis explores methods for achieving reinforcement learning on large continuous state spaces, where actions are not discrete. This is done by creating abstract states, allowing one state to represent numerous similar states. This saves time since not every state in the abstract state needs to be visited and saves space since only one state needs to be stored. The algorithm tested in this thesis learns which volumes of the state space are similar by recursively subdividing each volume with a KD-tree. Identifying if an abstract state should be split, which dimension should be split, and where that dimension should be split is done by collecting statistics on the previous effects of actions. Continuous actions are dealt with by giving actions inertia, so they can persist past state boundaries if it necessary.
ЕС, Россия, религия и страх. Религиовед Кристина Штёкль о спорной резолюции Европарламента
Creators: name: Stoeckl, Kristina
Publisher: name: Zenodo
Year: 2016

description: https://www.vedomosti.ru/opinion/articles/2016/11/29/667278-es-rossiya-religiya
Προστασία Προσωπικών Δεδομένων σε Εικονοσειρές
Creators: name: Χρίσκος, Παντελεήμων Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2017
Subjects: προστασία προσωπικών δεδομένων
ανίχνευση προσώπου
αναγνώριση προσώπου
personal data protection
face detection
face recognition

description: Κατά την εκπόνηση της παρούσας εργασίας, παρουσιάζεται η μεθοδολογία που αναπτύχθηκε για την προστασία της ιδιωτικότητας κατά τη χρήση Συστημάτων μη Επανδρωμένων Αεροσκαφών, ΣμηΕΑ. Στο πρώτο μέρος της εργασίας αναλύεται η έννοια της ιδιωτικότητας, δίνεται ο ορισμός και αναλύονται οι κατηγορίες της. Επίσης περιγράφονται διάφορες μέθοδοι που έχουν αναπτυχθεί για την προστασία της ιδιωτικότητας, καθώς και παραδείγματα αποτυχημένων προσπαθειών προστασίας της. Επίσης γίνεται αναφορά στις επιπτώσεις που είχαν οι παραπάνω αποτυχημένες προσπάθειες στον τρόπο με τον οποίο γίνεται η διαχείριση των προσωπικών δεδομένων από εταιρίες, κυβερνητικές υπηρεσίες αλλά και τους ίδιους τους ανθρώπους. Στο δεύτερο μέρος, γίνεται αναφορά στην ισχύουσα νομοθεσία της Ελλάδας για τη χρήση ΣμηΕΑ και αναλύεται η μεθοδολογία που αναπτύχθηκε για την επιλεκτική αποταυτοποίηση εικόνων προσώπου σε εικονοσειρές που λήφθηκαν με ΣμηΕΑ. Σκοπός είναι να επιτραπεί και ελεύθερη χρήση των ΣμηΕΑ ενώ ταυτόχρονα δεν καταπατείται η ιδιωτικότητα των προσώπων στον χώρο πτήσης τους. Επίσης παρουσιάζονται τα αποτελέσματα που προκύπτουν από τη χρήση της μεθοδολογίας σε εικονοσειρές. Από πειράματα που διεξήχθησαν συνάγεται το συμπέρασμα ότι η προτεινόμενη μεθοδολογία προσφέρει τα επιθυμητά αποτελέσματα. Στο τρίτο μέρος μελετάται η χρήση της μεθόδου αποταυτοποίησης προσώπων SVD-DID με σκοπό να αποτραπεί η ανίχνευση προσώπων σε εικόνες. Από τα πειραματικά αποτελέσματα μπορεί να αποδειχτεί ότι η μέθοδος SVD-DID επιτυγχάνει τον στόχο αυτόν
description: In this thesis a methodology is developed aiming to protect privacy during the use of Unmanned Aerial Vehicles, UAVs. In the first section of this thesis the notion of privacy is analyzed, a definition is given and its categories are mentioned. Also, various methods are described that have been developed for privacy protection. Example cases of privacy protection failure are presented and the impact these failures had on the management of private data by companies, government agencies and individuals. The second part refers to the existing legislation in Greece regarding the use of UAVs and analyzes the methodology developed for the selective de-identification of facial images in videos taken with UAVs. The aim is to enable and free use of UAVs without privacy infringement of the persons in the flight area. The results obtained from the use of the methodology in videos is also presented. From experiments conducted it can be concluded that the proposed methodology provides the desired results. The third part studies the use of the SVD-DID face de-identification method in order to prevent the face detection in images. From the experimental results can be demonstrated that the SVD-DID method achieves this goal
The targum (1950:Mar. 3 - 1950:Mar. 24)
Creators: name: No Name Supplied
Publisher: name: Targum Association
Year: 1950

description: Some University historians indicate that the Targum was first published as an annual in 1867, but of this we have no extant evidence. In January 1869, the Targum as we now know it, made its appearance as a monthly paper that concerned itself with student “literary contributions” and college news as well as serving as a vehicle for bringing news to alumni and the general public. The newspaper, which originally was for sale, varied in frequency over the years as did its title (The Targum, Rutgers Targum, Rutgers Daily Targum, and Daily Targum). The newspaper has continuously been published since 1869 with the exception of 19 months during the second world war, between February 1944 and October 1945. The Targum was published by the students of Rutgers College, and later Rutgers University—New Brunswick represented through the years as the Targum Association, Rutgers Targum Association, and Rutgers College Targum. As a student organization, the Targum operated under the oversight of the dean of students and student government but in October 1980, the Targum became an independent college paper.
Maintaining Insect-Free Farm-Stored Grain
Creators: name: Research, Stored-Product Insects
name: Research, Stored-Product Insects
Publisher: name: Unknown
Year: 1991
Subjects: subject: Crop Production/Industries
subject: Farm Management
subject: controlled atmospheres
subject: fumigants
subject: grain
subject: insecticide
subject: modified atmospheres
subject: pesticides
subject: restricted-use pesticides
subject: storage insects
subject: storage pests

description: This publication provides information on the basic requirements for preparing onfarm grain-storage bins to receive grain, how to protect grain from insects during storage, and how to inspect for and detect insect infestation in stored grain.
Numerical implementation of the exact dynamics of free rigid bodies
Creators: name: van Zon, Ramses
name: Schofield, Jeremy
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: In this paper the exact analytical solution of the motion of a rigid body with arbitrary mass distribution is derived in the absence of forces or torques. The resulting expressions are cast into a form where the dependence of the motion on initial conditions is explicit and the equations governing the orientation of the body involve only real numbers. Based on these results, an efficient method to calculate the location and orientation of the rigid body at arbitrary times is presented. This implementation can be used to verify the accuracy of numerical integration schemes for rigid bodies, to serve as a building block for event-driven discontinuous molecular dynamics simulations of general rigid bodies, and for constructing symplectic integrators for rigid body dynamics.
description: Shortened paper with updated references, 28 pages, 3 figures