cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Hierarchy of rational order families of chaotic maps with an invariant measure
Creators: name: Jafarizadeh, M. A.
name: Foroutan, M.
name: Ahadpour, S.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We introduce an interesting hierarchy of rational order chaotic maps that posses an invariant measure. In contrast to the previously introduced hierarchy of chaotic maps \cite{J1,J2,J3,J4,J5}, with merely entropy production, the rational order chaotic maps can simultaneously produce and consume entropy . We compute the Kolmogorov-Sinai entropy of theses maps analytically and also their Lyapunov exponent numerically, where that obtained numerical results support the analytical calculations.
description: 19 pages 2 figures
Real-World Snapshots vs. Theory: Questioning the t-Probing Security Model
Creators: name: Krachenfels, Thilo
name: Ganji, Fatemeh
name: Moradi, Amir
name: Tajik, Shahin
name: Seifert, Jean-Pierre
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: Due to its sound theoretical basis and practical efficiency, masking has become the most prominent countermeasure to protect cryptographic implementations against physical side-channel attacks (SCAs). The core idea of masking is to randomly split every sensitive intermediate variable during computation into at least t+1 shares, where t denotes the maximum number of shares that are allowed to be observed by an adversary without learning any sensitive information. In other words, it is assumed that the adversary is bounded either by the possessed number of probes (e.g., microprobe needles) or by the order of statistical analyses while conducting higher-order SCA attacks (e.g., differential power analysis). Such bounded models are employed to prove the SCA security of the corresponding implementations. Consequently, it is believed that given a sufficiently large number of shares, the vast majority of known SCA attacks are mitigated. In this work, we present a novel laser-assisted SCA technique, called Laser Logic State Imaging (LLSI), which offers an unlimited number of contactless probes, and therefore, violates the probing security model assumption. This technique enables us to take snapshots of hardware implementations, i.e., extract the logical state of all registers at any arbitrary clock cycle with a single measurement. To validate this, we mount our attack on masked AES hardware implementations and practically demonstrate the extraction of the full-length key in two different scenarios. First, we assume that the location of the registers (key and/or state) is known, and hence, their content can be directly read by a single snapshot. Second, we consider an implementation with unknown register locations, where we make use of multiple snapshots and a SAT solver to reveal the secrets.
description: This is the authors' version of the article accepted for publication at IEEE Symposium on Security and Privacy 2021
BPS String Webs in the 6-dim (2,0) Theories
Creators: name: Lee, Ki-Myeong
name: Yee, Ho-Ung
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In the Coulomb phase of the 6-dim (2,0) superconformal theories, the 1/4, 1/8, 1/16 BPS selfdual string webs are argued to exist such that the spatial SO(5) and internal SO(5) rotations are correlated. The basic constituents are 1/2 BPS strings and 1/4 BPS string junctions. One support comes from the existence of the similar BPS dyonic monostring webs in 5-dim maximally supersymmetric gauge theories. Another comes from the study of the supersymmetry of the intersecting M2 brane stripes terminating on M5 branes. We also discuss the related BPS webs in little string theories and other theories.
description: 14 pages, JHEP format
Kelly, William Henry Seward to Abraham Lincoln letter
Creators: name: Kelly, Michael
Publisher: name: University of Rochester
Year: 2024
Subjects: classificationCode: 43
subject: History, heritage and archaeology
classificationCode: 430321
subject: North American history
classificationCode: 470307
subject: English language

description: Students in two of Professor Robert Westbrook's courses in American intellectual history, "The American Mind, 1600-1865" (History 267) and "The American Mind, 1865-1990" (History 268), use manuscript materials as part of a research assignment. This assignment, called "Other People's Mail," requires that students transcribe a document and write an introduction to it, placing the document in its context and suggesting the ways in which it bears on significant themes in the course.

Please Note: All rights regarding the papers rest with the authors. The images of the manuscripts may not be reproduced without obtaining prior written permission from the Department of Rare Books and Special Collections.
This document was adapted from a webpage hosted on the Rare Books, Special Collections, and Manuscripts website, before being converted into a static document and uploaded to URRR on 2024-10-05.
Data FAIR Publiceren
Creators: name: Braukmann, Ricarda
Publisher: name: Zenodo
Year: 2024
Subjects: Data archiving
Open Science
FAIR Data

description: Slides presented at an introduction meeting at the NIPV on October 08th - the presentation discusses the background of Open Science and FAIR Data and the services DANS offers. In particular, we discuss how data can be found, and archived and published at the DANS Data Station.

The slides also include a lot of links to additional guidance and information.
Smectic Liquid Crystals in an Anisotropic Random Environment
Creators: name: Liang, Dennis
name: Leheny, Robert L.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: We report a high-resolution x-ray scattering study of the smectic liquid crystal octylcyanobiphenyl (8CB) confined to aligned colloidal aerosil gels. The aligned gels introduce orientational fields that promote long-range nematic order while imposing positional random fields that couple to the smectic density wave and disrupt the formation of an ordered smectic phase. At low densities of aerosil, the low-temperature scattering intensity is consistent with the presence of a topologically ordered XY Bragg glass phase that is predicted to form in response to such anisotropic quenched disorder. The observed features of the phase include an algebraic decay of the smectic correlations, which is truncated at large length scales due to the imperfect nematic order, and a power-law exponent that agrees closely with the universal value predicted for the XY Bragg glass. At higher aerosil densities, deviations from the XY Bragg glass form are apparent. At high temperature, the scattering intensity displays pre-transitional dynamic fluctuations associated with the destroyed nematic to smectic-A transition. The fluctuations obey quasi-critical behavior over an extended range of reduced temperature. The effective critical exponents for the correlation lengths and smectic susceptibility differ systematically from those of pure 8CB, indicating that coupling of the nematic order to the gel suppresses its role in the smectic critical behavior.
description: 11 pages, 11 figures
Real-Time Model-Checking: Parameters everywhere
Creators: name: Bruyere, Veronique
name: Raskin, Jean-Francois
Publisher: name: arXiv
Year: 2007
Subjects: subject: Logic in Computer Science (cs.LO)
subject: FOS: Computer and information sciences
subject: F.1.1

description: In this paper, we study the model-checking and parameter synthesis problems of the logic TCTL over discrete-timed automata where parameters are allowed both in the model (timed automaton) and in the property (temporal formula). Our results are as follows. On the negative side, we show that the model-checking problem of TCTL extended with parameters is undecidable over discrete-timed automata with only one parametric clock. The undecidability result needs equality in the logic. On the positive side, we show that the model-checking and the parameter synthesis problems become decidable for a fragment of the logic where equality is not allowed. Our method is based on automata theoretic principles and an extension of our method to express durations of runs in timed automata using Presburger arithmetic.
Μουσείο Εκπαίδευσης: χωρικός μουσειολογικός σχεδιασμός
Creators: name: Γιαλιά, Βασιλική Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Μουσείο
Εκθεσιακός σχεδιασμός
Εκπαίδευση
Museum
Exhibition design
Education

description: Αντικείμενο της παρούσας μελέτης είναι ο Αρχιτεκτονικός Προγραμματισμός και Σχεδιασμός για το Μουσείο Εκπαίδευσης στη Βέροια. Σκοπός είναι να παρουσιαστεί σε φάση προμελέτης ο χωρικός μουσειολογικός σχεδιασμός της μόνιμης έκθεσης του μουσείου, σύμφωνα με το νοηματικό μουσειολογικό σχεδιασμό του Χρήστου Καραγιαννίδη1. Η μελέτη περιλαμβάνει τεχνική έκθεση, φωτογραφίες, σκίτσα, σχέδια και φωτορεαλιστικές απεικονίσεις.
description: Purpose of this study is the Architectural Planning and Design for the Museum of Education in Veria. The aim is to present a preliminary design phase for the spatial planning of the permanent exhibition of the museum, according to the conceptual design of Chris Karagiannidis. The project includes a technical report, photographs, sketches, drawings and photorealistic renderings.
description: Σε συνεργασία με το Παιδαγωγικό Τμήμα Δημοτικής Εκπαίδευσης (Πανεπιστήμιο Δυτικής Μακεδονίας)
The intrinsic dimensionality of spectro-polarimetric data
Creators: name: Ramos, A. Asensio
name: Socas-Navarro, H.
name: Ariste, A. Lopez
name: Gonzalez, M. J. Martinez
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The amount of information available in spectro-polarimetric data is estimated. To this end, the intrinsic dimensionality of the data is inferred with the aid of a recently derived estimator based on nearest-neighbor considerations and obtained applying the principle of maximum likelihood. We show in detail that the estimator correctly captures the intrinsic dimension of artificial datasets with known dimension. The effect of noise in the estimated dimension is analyzed thoroughly and we conclude that it introduces a positive bias that needs to be accounted for. Real simultaneous spectro-polarimetric observations in the visible 630 nm and the near-infrared 1.5 microns spectral regions are also investigated in detail, showing that the near-infrared dataset provides more information of the physical conditions in the solar atmosphere than the visible dataset. Finally, we demonstrate that the amount of information present in an observed dataset is a monotonically increasing function of the number of available spectral lines.
description: 12 pages, 7 figures, accepted for publication in the Astrophysical Journal
Ultraviolet properties of Maximal Supergravity
Creators: name: Green, Michael B.
name: Russo, Jorge G.
name: Vanhove, Pierre
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We argue that recent results in string perturbation theory indicate that the four-graviton amplitude of four-dimensional N=8 supergravity might be ultraviolet finite up to eight loops. We similarly argue that the h-loop M-graviton amplitude might be finite for h<7+M/2.
description: 10 pages. v2 : Important qualifications inserted and typos corrected. v3: minor changes. References added. Version to be published
Αλληλεπίδραση ακτινοβολίας με βιολογικούς ιστούς:
Creators: name: Γκουμπανιτσά, Μαγδαληνή Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Ακτινοβολία
Βιολογικός ιστός
Μόντε Κάρλο
Radiation
Biological tissue
Monte Carlo

description: Σκοπός της εργασίας είναι η μελέτη της αλληλεπίδρασης της ακτινοβολίας με βιολογικούς ιστούς. Αυτό επιτυγχάνεται με την προσομοίωση της διάδοσης της ακτινοβολίας μέσα σε ιστό με την χρήση της μεθόδου Monte Carlo. Το πρόγραμμα έχει γραφεί σε C++ γλώσσα προγραμματισμού. Μ’ αυτό επιτυγχάνεται η προσομοίωση της διείσδυσης της ακτινοβολίας από μία ευθύγραμμη δέσμη μέσω ενός βιολογικού ιστού καθώς και της εκ νέου εκπομπής της που συμβαίνει λόγω του φαινομένου του φθορισμού. Οι βιολογικοί ιστοί που προσομοιώνονται έχουν διαφορετικές οπτικές ιδιότητες και είναι οι εξής : ανθρώπινο δέρμα, μυς βοδινού, στήθος κοτόπουλου, λίπος βοδινού και συκώτι βοδινού. Τα συμπεράσματα που προκύπτουν από τα διαγράμματα είναι πως η διάδοση της ακτινοβολίας στο ανθρώπινο δέρμα, και στον μυ βοδινού έχει πολλές ομοιότητες λόγω των παρόμοιων οπτικών τους ιδιοτήτων ενώ στο συκώτι βοδινού παρατηρούμε έντονο το φαινόμενο φθορισμού και της μεγαλύτερης διείσδυσης της ακτινοβολίας και στο λίπος βοδινού πολύ μικρό φθορισμό καθώς και μικρότερη διείσδυση της ακτινοβολίας.
description: The purpose of this paper is to study the interaction of radiation with biological tissues. This is achieved by simulating the propagation of radiation in tissue using the method Monte Carlo. The program is written in C + + programming language. This is accomplished by simulating the penetration of radiation from a straight beam through a biological tissue and the re emission that occurs because of the phenomenon of fluorescence. The biological tissues with different optical properties which are simulated are: human tissue, bovine muscle, chicken breast, bovine fat and bovine liver. The conclusions from the diagrams are that the distribution of radiation on human skin and bovine muscle has many similarities because of their similar optical properties. On the bovine liver instead the distribution of radiation is greater and the phenomenon of fluorescence is intense and on the bovine fat the distribution of radiation is less and the phenomenon of is very little.
Non-minimal Higgs inflation within holographic cosmology
Creators: name: Bargach, Aatifa
name: Bargach, Farida
name: Bouhmadi-López, Mariam
name: Ouali, Taoufik
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We derive a Higgs inflationary model in the context of holographic cosmology, where we consider a universe filled with a Higgs field non-minimally coupled to gravity in a slow-roll regime. The amplitude of density (scalar) perturbations is calculated. In this regard, we show that the background and perturbative parameters characterising the inflationary era are related to the standard one through corrections terms. We found that for the e-fold number $N\sim 58$, the spectral index,$n_{r}$, and the tensor-to-scalar ratio,$r$, values are $0.965$ and $0.021$, respectively, which are in agreement with 2018 Planck observational data. However, as soon as we move from $N\sim 58$, the model is ruled out by the current data.
description: 12 pages, 7 figures, accepted for publication in PRD
Ciência Aberta e os desafios para o compartilhamento de dados de pesquisa genômica
Creators: name: da Silva, Fábio Bernardo
name: Veiga, Viviane
Publisher: name: Zenodo
Year: 2024

description: Apresentação realizada na sessão Pecha Kucha I, da 15ª Conferência Lusófona de Ciência Aberta, na Escola Superior de Enfermagem do Porto (ESEP), de 01 a 04 de outubro de 2024.
Training women to be teachers in early childhood education and the politics of participation
Creators: name: Hodges, Diane Celia
Publisher: name: University of British Columbia
Year: 2009

description: In this current project I set out to critically read the practices and discourses which are invested in socializing women to be teachers in Early Childhood Education. In order to better understand the complex processes of identification within a community of shared practice, I have attempted to disrupt the text in a way which interrupts dominant academic discourses and which also fattens the scope of the focus. By mirroring my own participation in teacher-training within Early Childhood Education communities against my participation as a graduate student in the Faculty of Graduate Studies, I have tried to uncover the social and institutional relations which interact in the (discursive) production of self. While acknowledging, on the one hand, that identity is multiplicitous, there are undeniable ideologies which maintain a "logic of unity" in the construction and production of self. These oppositionalities are analyzed in this document as sites of struggle; specifically in the institutionalized practices of observation and in journalling. The participation of women in the social/political arena of professionalism continues to pit gender/race/class against the traditional dominant discourses and practices of education. Working in opposition to these structures is both a performance and an interpretation of participation: how these conflicts manifest in issues of identification, affiliation, and community membership are critical issues for research and practice in education.
The Dynamics of the Wide-Angle Tailed (WAT) galaxy cluster Abell 562
Creators: name: Gomez, Percy L.
name: Calderon, Diego
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present the first in depth dynamical analysis of the archetypal Wide-Angle Tailed (WAT) cluster Abell 562. We have combined Gemini observations with archival data from the literature to form a sample of 76 cluster members and derived a mean redshift of $0.1088 \pm 0.0004$ and a velocity dispersion of $919 \pm 116$ km s$^{-1}$. This relatively large velocity dispersion suggests either a very massive cluster ($M_{dyn} > 6.9 \times$ 10$^{14}$ $M_{sun}$) and/or a merger system. The merger model is supported by a non-Gaussian galaxy velocity distribution, an elongated spatial distribution of likely cluster members, and an elongated X-ray emitting gas. This scenario would generate the bulk flow motion of the intra-cluster medium that can exert enough ram pressure to bend the radio jets. Thus, our observations support the model in which a recent off-axis merger event produced the cluster wide conditions needed to shape the WAT in Abell 562.
description: 25 pages and 13 figures
Non-Perturbative Renormalization Group for Simple Fluids
Creators: name: Caillol, Jean-Michel
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We present a new non perturbative renormalization group for classical simple fluids. The theory is built in the Grand Canonical ensemble and in the framework of two equivalent scalar field theories as well. The exact mapping between the three renormalization flows is established rigorously. In the Grand Canonical ensemble the theory may be seen as an extension of the Hierarchical Reference Theory (L. Reatto and A. Parola, \textit{Adv. Phys.}, \textbf{44}, 211 (1995)) but however does not suffer from its shortcomings at subcritical temperatures. In the framework of a new canonical field theory of liquid state developed in that aim our construction identifies with the effective average action approach developed recently (J. Berges, N. Tetradis, and C. Wetterich, \textit{Phys. Rep.}, \textbf{363} (2002)).
Τουριστικό Μάρκετινγκ: η περίπτωση των έντυπων διαφημίσεων του ΕΟΤ για την προβολή της
Creators: name: Σαμαρά, Χριστίνα Νικολάου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Τουριστικό Μάρκετινγκ
Διαφήμιση
Εντυπες διαφημίσεις ΕΟΤ
Tourism marketing
Advertising
Printed advertisements of Greek National Tourism Organisation (GNTO)

description: Η παρούσα διπλωματική εργασία μελετά τις έντυπες διαφημίσεις που εξέδωσε ο ΕΟΤ για την προβολή της εικόνας της Ελλάδας στο εξωτερικό την χρονική περίοδο από το 2004 μέχρι και το 2012. Μεγάλο μέρος της εργασίας αφιερώνεται στην βιβλιογραφική επισκόπηση βασικών εννοιών για την κατανόηση του υπό μελέτη θέματος όπως για παράδειγμα η έννοια του μάρκετινγκ, του τουριστικού ειδικότερα μάρκετινγκ , αλλά και των βασικών επικοινωνιακών εργαλείων του επικοινωνιακού μάρκετινγκ με ιδιαίτερη έμφαση στην διαφήμιση. Στη συνέχεια πραγματοποιείται η σχετική έρευνα με την χρήση της μεθόδου της ανάλυσης περιεχομένου σε 73 έντυπες διαφημίσεις. Η μελέτη έδειξε ότι τα διαφημιστικά μηνύματα των έντυπων διαφημίσεων δεν έχουν καμία λογική συνέχεια μεταξύ τους και η προσέγγισή τους γίνεται κυρίως με την έκκληση στο συναίσθημα. Επιπρόσθετα , από πλευράς θεματικής το στερεότυπο τρίπτυχο «Ήλιος-Θάλασσα-Πολιτισμός» μονοπωλεί όλες τις έντυπες διαφημίσεις που εξετάσαμε. Επιπλέον , η προκείμενη έρευνα έδειξε ότι σε καμία από τις έντυπες διαφημίσεις του ΕΟΤ για το εξωτερικό δεν υπάρχει η χρήση του χιούμορ , του φόβου ή κάποιου ερωτικού στοιχείου. Ταυτόχρονα, καταλήξαμε στο συμπέρασμα ότι υπάρχει σαφής στόχευση στις νεαρές ηλικίες 20-40 ετών και δεν αναδεικνύεται καμία νέα μορφή τουρισμού όπως για π.χ ο Αθλητικός ,ο Θρησκευτικός ή ο Ιαματικός τουρισμός.
description: This master thesis examines the printed advertisements which were published by the Greek National Tourism Organization(GNTO) to promote the image of Greece abroad the period 2004-2012. A large part of the paper presents the literature review of the basic notions of the examined topic such as marketing, and more specifically the notion of tourism marketing. In order to understand it comprehensively the theoretical part also includes the basic communication tools of marketing communications emphasizing on advertising . The research of the present case study was contacted through the content analysis of 73 printed advertisements. Analysis showed that the advertising messages of the examined printed advertisements didn’t have any reasonable continuity and all of them were approached by the emotional appeal. In addition, “Sea-Sand-Culture” as the classical theme stereotype is used to almost all the advertisements we examined. Furthermore , the use of humor , fear or erotic element there was not in any of the 73 printed advertisements. At the same time we came to the conclusion that the target group of the GNTO’s printed advertisements was people approximately at the age of 20-40 years old . Last but not least , at the present study was not detected any new forms of tourism such as the Athletic or Religious or Spa tourism.
Two-dimensional spectroscopy beyond the perturbative limit: the influence of finite pulses and detection modes
Creators: name: Anda, André
name: Cole, Jared H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Ultra-fast and multi-dimensional spectroscopy gives a powerful looking glass into the dynamics of molecular systems. In particular two-dimensional electronic spectroscopy (2DES) provides a probe of coherence and the flow of energy within quantum systems which is not possible with more conventional techniques. While heterodyne-detected (HD) 2DES is increasingly common, more recently fluorescence-detected (FD) 2DES offers new opportunities, including single-molecule experiments. However in both techniques it can be difficult to unambiguously identify the pathways which dominate the signal. Therefore the use of numerically modelling of 2DES is vitally important, which in turn requires approximating the pulsing scheme to some degree. Here we employ non-pertubative time evolution to investigate the effects of finite pulse width and amplitude on 2DES signals. In doing so we identify key differences in the response of HD and FD detection schemes, as well as the regions of parameter space where the signal is obscured by unwanted artefacts in either technique. Mapping out parameter space in this way provides a guide to choosing experimental conditions and also shows in which limits the usual theoretical approximations work well and which limits more sophisticated approaches are required.
description: 28 pages, 10 figures + appendix
Reading Articles Online
Creators: name: Karrenbauer, Andreas
name: Kovalevskaya, Elizaveta
Publisher: name: arXiv
Year: 2020
Subjects: subject: Data Structures and Algorithms (cs.DS)
subject: FOS: Computer and information sciences

description: We study the online problem of reading articles that are listed in an aggregated form in a dynamic stream, e.g., in news feeds, as abbreviated social media posts, or in the daily update of new articles on arXiv. In such a context, the brief information on an article in the listing only hints at its content. We consider readers who want to maximize their information gain within a limited time budget, hence either discarding an article right away based on the hint or accessing it for reading. The reader can decide at any point whether to continue with the current article or skip the remaining part irrevocably. In this regard, Reading Articles Online, RAO, does differ substantially from the Online Knapsack Problem, but also has its similarities. Under mild assumptions, we show that any $α$-competitive algorithm for the Online Knapsack Problem in the random order model can be used as a black box to obtain an $(\mathrm{e} + α)C$-competitive algorithm for RAO, where $C$ measures the accuracy of the hints with respect to the information profiles of the articles. Specifically, with the current best algorithm for Online Knapsack, which is $6.65<2.45\mathrm{e}$-competitive, we obtain an upper bound of $3.45\mathrm{e} C$ on the competitive ratio of RAO. Furthermore, we study a natural algorithm that decides whether or not to read an article based on a single threshold value, which can serve as a model of human readers. We show that this algorithmic technique is $O(C)$-competitive. Hence, our algorithms are constant-competitive whenever the accuracy $C$ is a constant.
description: Manuscript of COCOA 2020 paper
Light rings of five-dimensional geometries
Creators: name: Bianchi, Massimo
name: Consoli, Dario
name: Grillo, Alfredo
name: Morales, Jose Francisco
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study massless geodesics near the photon-spheres of a large family of solutions of Einstein-Maxwell theory in five dimensions, including BHs, naked singularities and smooth horizon-less JMaRT geometries obtained as six-dimensional uplifts of the five-dimensional solution. We find that a light ring of unstable photon orbits surrounding the mass center is always present, independently of the existence of a horizon or singularity. We compute the Lyapunov exponent, characterizing the chaotic behaviour of geodesics near the `photon-sphere' and the time decay of ring-down modes dominating the response of the geometry to perturbations at late times. We show that, for geometries free of naked singularities, the Lyapunov exponent is always bounded by its value for a Schwarzschild BH of the same mass.
description: 19 pages, 5 figures
title: What is Community Participation?
Creators: name: Sabella, Kathryn
name: Thomas, Elizabeth
Publisher: name: UMass Chan Medical School
Year: 2024

description: The Center for Community Inclusion and Reflective Collaboration (the CIRC Center) is a research and training center that aims to significantly advance community participation outcomes among young adults (14–26) with serious mental health conditions from populations that have been marginalized or minoritized. The term community participation is used in mental health services and research to refer to community-based activities that promote overall health and wellness. However, many people find this concept to be confusing, vague, and hard to understand. This tip sheet will define “community participation,” describe relevant experiences of young adults (ages 14–26) with serious mental health conditions (SMHC) from populations that have been marginalized, and provide reflections from our various advisory boards of young adults, family members, and professionals in the field.
Harmonic analysis of finite lamplighter random walks
Creators: name: Scarabotti, Fabio
name: Tolli, Filippo
Publisher: name: arXiv
Year: 2007
Subjects: subject: Probability (math.PR)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: Primary: 43A85; secondary: 05C05, 20C15, 20E22, 60G50

description: Recently, several papers have been devoted to the analysis of lamplighter random walks, in particular when the underlying graph is the infinite path $\mathbb{Z}$. In the present paper, we develop a spectral analysis for lamplighter random walks on finite graphs. In the general case, we use the $C_2$-symmetry to reduce the spectral computations to a series of eigenvalue problems on the underlying graph. In the case the graph has a transitive isometry group $G$, we also describe the spectral analysis in terms of the representation theory of the wreath product $C_2\wr G$. We apply our theory to the lamplighter random walks on the complete graph and on the discrete circle. These examples were already studied by Haggstrom and Jonasson by probabilistic methods.
description: 29 pages
The Radiosity technique for indoor wave propagation using the Monte Carlo method
Creators: name: Μαρκούλης, Αντώνιος Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Ακτινοβολία
Διάδοση
Εσωτερικοί χώροι
Radiance
Propagation
Indoor

description: Η τεχνική Radiosity είναι μια μέθοδος ευρέως χρησιμοποιούμενη στον φωτορεαλισμό για την ρεαλιστική απόδοση σκηνικών εικόνας. Εκμεταλλευόμενοι το γεγονός ότι το φως μπορεί να θεωρηθεί σαν κύμα, η τεχνική Radiosity χρησιμοποιείται τώρα για την περιγραφή της ηλεκτρομαγνητικής ακτινοβολίας σε εσωτερικούς χώρους στην συχνότητα των 2.5GHz. Για την περιγραφή του 3-διάστατου χώρου, κατασκευάζεται ένας συντακτικός αναλυτής ο οποίος μετατρέπει αρχεία τύπου .IGES από προγράμματα CAD σε αρχεία που οργανώνουν την πληροφορία σε διασυνδεόμενες λίστες. Επιπλέον ο συντακτικός αναλυτής διαιρεί τα αντικείμενα σε πλέγμα και τοποθετεί την κεραία εκπομπής. Για τον υπολογισμό των παραγόντων δομής, χρησιμοποιείται η Μέθοδος πλήρους επιφάνειας σε πλήρη επιφάνεια Monte Carlo για πρώτη φορά στην διάδοση ηλεκτρομαγνητικής ακτινοβολίας σε κλειστούς χώρους. Για την επίλυση του συστήματος των εξισώσεων της τεχνικής Radiosity χρησιμοποιείται η μέθοδος προοδευτικής διόρθωσης. Τέλος, τα αποτελέσματα της προσομοίωσης για ρεαλιστικούς εσωτερικούς χώρους συγκρίνονται με αποτελέσματα από μεθόδους προσομοίωσης όπως η τεχνική του Ημικύβου και η μέθοδος FDTD καθώς επίσης και με πειραματικά δεδομένα.
description: Radiosity is a method widely-used in photorealism for rendering image scenes. Exploiting the fact that light itself can be considered as a wave, Radiosity in now used in order to describe indoor wave propagation in the frequency of 2.5GHz. For the description of 3D-space, a parser that converts .IGES files from CAD programs into files that organize environmental data in linked-lists is proposed. Furthermore, the parser performs an initial meshing procedure and the positioning of the antenna. For the computation of the form factors, a full area to area Monte Carlo method is used for the ?rst time in indoor propagation, while the Radiosity equations system are solved using the progressive re?nement Radiosity algorithm. Finally, the simulation results of realistic indoor environments are compared with numerical methods such as the Hemicube Radiosity method and the FDTD method along with experimental results.
Quantum Control in Open and Periodically Driven Systems
Creators: name: Bai, Si-Yuan
name: Chen, Chong
name: Wu, Hong
name: An, Jun-Hong
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum technology resorts to efficient utilization of quantum resources to realize technique innovation. The systems are controlled such that their states follow the desired manners to realize different quantum protocols. However, the decoherence caused by the system-environment interactions causes the states deviating from the desired manners. How to protect quantum resources under the coexistence of active control and passive decoherence is of significance. Recent studies have revealed that the decoherence is determined by the feature of the system-environment energy spectrum: Accompanying the formation of bound states in the energy spectrum, the decoherence can be suppressed. It supplies a guideline to control decoherence. Such idea can be generalized to systems under periodic driving. By virtue of manipulating Floquet bound states in the quasienergy spectrum, coherent control via periodic driving dubbed as Floquet engineering has become a versatile tool not only in controlling decoherence, but also in artificially synthesizing exotic topological phases. We will review the progress on quantum control in open and periodically driven systems. Special attention will be paid to the distinguished role played by the bound states and their controllability via periodic driving in suppressing decoherence and generating novel topological phases.
description: A review article
MoSi2N4 single-layer: a novel two-dimensional material with outstanding mechanical, thermal, electronic, optical, and photocatalytic properties
Creators: name: Bafekry, A.
name: Faraji, M.
name: Hoat, Do M.
name: Fadlallah, M. M.
name: Shahrokhi, M.
name: Shojaei, F.
name: Gogova, D.
name: Ghergherehchi, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Very recently, the two-dimensional (2D) form of MoSi2N4 has been successfully fabricated [Hong et al., Sci. 369, 670 (2020)]. Motivated by theses recent experimental results, herein we investigate the structural, mechanical, thermal, electronic, optical and photocatalytic properties using hybrid density functional theory (HSE06-DFT). Phonon band dispersion calculations reveal the dynamical stability of MoSi2N4 monolayer structure. Furthermore, the mechanical study confirms the stability of MoSi2N4 monolayer. As compared to the corresponding value of graphene, we find the Youngs modulus decreases by 30% while the Poissons ratio increases by 30%. In addition, its work function is very similar to that of phosphorene and MoS2 monolayers. The electronic structure investigation shows the MoSi2N4 monolayer is an indirect bandgap semiconductor. We have determined the bandgap using the HSE06 (GGA) is 2.35 (1.79) eV, which is an overestimated (underestimated) value of the experimental bandgap (1.99 eV). The thermoelectric study shows a good thermoelectric performance of the MoSi2N4 monolayer with a figure of merit slightly larger than unity at high temperatures. The optical analysis using the RPA method constructed over HSE06 shows that the first absorption peak of the MoSi2N4 monolayer for in-plane polarization is located in the visible range of spectrum, i.e. it is a promising candidate for advancing optoelectronic nanodevices. The photocatalytic study indicates the MoSi2N4 monloayer can be a promising photocatalyst for water splitting as well as and CO2 reduction. In summary, the fascinating MoSi2N4 monloayer is a promising 2D material in many applications due to its unique physical properties.
Quarkonium propagation in the quark gluon plasma
Creators: name: Sharma, Rishi
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In relativistic heavy ion collisions at RHIC and the LHC, a quark gluon plasma (QGP) is created for a short duration of about 10fm/c. Quarkonia (bound states of $c\bar{c}$ and $b\bar{b}$) are sensitive probes of this phase on length scales comparable to the size of the bound states which are less than 1fm. Observations of quarkonia in these collisions provide us with a lot of information about how the presence of a QGP affects various quarkonium states. This has motivated the development of the theory of heavy quarks and their bound states in a thermal medium, and its application to the phenomenology of quarkonia in heavy ion collisions. We review some of these developments here.
description: 34 pages, 7 figures, Invited review article for EPJ ST
A four-qubit germanium quantum processor
Creators: name: Hendrickx, N. W.
name: Lawrie, W. I. L.
name: Russ, M.
name: van Riggelen, F.
name: de Snoo, S. L.
name: Schouten, R. N.
name: Sammak, A.
name: Scappucci, G.
name: Veldhorst, M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The prospect of building quantum circuits using advanced semiconductor manufacturing positions quantum dots as an attractive platform for quantum information processing. Extensive studies on various materials have led to demonstrations of two-qubit logic in gallium arsenide, silicon, and germanium. However, interconnecting larger numbers of qubits in semiconductor devices has remained an outstanding challenge. Here, we demonstrate a four-qubit quantum processor based on hole spins in germanium quantum dots. Furthermore, we define the quantum dots in a two-by-two array and obtain controllable coupling along both directions. Qubit logic is implemented all-electrically and the exchange interaction can be pulsed to freely program one-qubit, two-qubit, three-qubit, and four-qubit operations, resulting in a compact and high-connectivity circuit. We execute a quantum logic circuit that generates a four-qubit Greenberger-Horne-Zeilinger state and we obtain coherent evolution by incorporating dynamical decoupling. These results are an important step towards quantum error correction and quantum simulation with quantum dots.
description: 7 pages, 5 figures, supplementary materials with 11 figures and 2 tables in separate file
Υποάλγεβρες Ελεύθερων Lie αλγεβρών
Creators: name: Σεβασλίδου, Ησαϊα Εμμανουήλ
Publisher: name: Aristotle University of Thessaloniki
Year: 2012
Subjects: Lie άλγεβρα
Κανονική λέξη
Ελεύθερη Lie άλγεβρα
Lie algebra
Regular word
Free Lie algebra

description: Στην παρούσα διπλωματική εργασία, ασχολούμαστε με υποάλγεβρες ελεύθερων Lie αλγεβρών πάνω από τυχαίο σώμα. Συγκεκριμένα, παρουσιάζουμε μια μερικώς τροποποιημένη απόδειξη ενός αποτελέσματος που η απόδειξη του δόθηκε στο [Baht.] (Theorem 3, σελ. 55), σχετικά με την ελευθερία τους. Η διπλωματική εργασία αποτελείται από τρία κεφάλαια. Στο πρώτο κεφάλαιο γίνεται αναφορά στις βασικότερες έννοιες των Lie αλγεβρών και παρουσιάζεται μια κατασκευή ελεύθερης Lie άλγεβρας βασισμένη στην έννοια του ελεύθερου μάγματος. Ο σκοπός του δευτέρου κεφαλαίου είναι η απόδειξη ενός αποτελέσματος του Shirshov [Sh]. Το κύριο αποτέλεσμα στην [Sh] είναι ότι κάθε μη μηδενική υποάλγεβρα μιας ελεύθερης Lie άλγεβρας είναι ελεύθερη. Το αποτέλεσμα που αποδεικνύουμε είναι: Θεώρημα 2.1 Αν ένα σύνολο ομογενών στοιχείων μιας ελεύθερης Lie άλγεβρας έχει την ιδιότητα, κανένα από τα στοιχεία του να μην περιέχεται στην υποάλγεβρα που παράγουν τα υπόλοιπα, τότε το σύνολο αυτό αποτελεί σύνολο ελεύθερων γεννητόρων για την υποάλγεβρα που παράγει.Η απόδειξη βασίζεται στο παρακάτω αποτέλεσμα του Hall [H]. Το σύνολο των κανονικών λέξεων πάνω από ένα αλφάβητο R αποτελεί βάση της ελεύθερης Lie άλγεβρας πάνω από το R. Στο τρίτο κεφάλαιο αποδεικνύουμε το κύριο αποτέλεσμα της παρούσας διπλωματικής εργασίας. Για την απόδειξη του κύριου θεωρήματος έχουν χρησιμοποιηθεί οι βασικοί Lie μεταθέτες, η κατασκευή βαθμωτών συνόλων, το Θεώρημα 2.1, η τεχνική του Lazard (Elimination Theorem) και το γεγονός ότι η παράγουσα άλγεβρα είναι ελεύθερη Lie άλγεβρα με σαφές σύνολο ελεύθερων γεννητόρων.
description: In this MSc thesis, we study non-zero subalgebras of free Lie algebras over a field. In particular, we slightly modify a proof of a result which is proved ([Baht.], Theorem 3, p. 55), regarding their freeness. This MSc thesis is divided into three Chapters. In Chapter 1, we give the basic notions of Lie algebras and present a construction of a free Lie algebra by means of free magma. Our main aim in Chapter 2 is to give a proof of a result of Shirshov [Sh]. This result is not clearly stated in [Sh], but it is one of the basic steps for the proof of the main theorem in [Sh]. The main theorem states: Every non-zero subalgebra of a free Lie algebra over a field is free. We prove the following: Theοrem 2.1 If a set of homogeneous elements in a free Lie algebra has the property that no element of it is contained in the subalgebra generated by the other elements, then this subset is a free generating set for the subalgebra it generates. The proof is based on a result of Hall [H]. The set of regular words over an alphabet R forms a basis for the free Lie algebra on R. The proοf of the main result is given in Chapter 3 and is based on the notion of basic Lie commutators, on a construction of graded sets, on Theorem 2.1, on Lazard Elimination Theorem and on a standard free generating set of the derived algebra
Screening of Different Rice Genotypes for Blast Disease Resistance in Gokarna-Lalitpur, Nepal
Creators: name: Sharma, Pratiksha
name: Chapagain, Upama
name: Ojha, Jesish
name: Kushwaha, Ujjawal Kumar
Publisher: name: Zenodo
Year: 2023

description: Rice (Oryza sativa L.) is the major cereal crop of Nepal belonging to the Gramineae family. Every year, its production is highly affected by devastating rice blast disease caused by Pyricularia oryzae Cavara. With the view to recognize the resistant genotypes against both leaf and neck blast disease, a rice blast screening nursery trial was conducted in Gokarna, Lalitpur in 2021 and 2022, consisting of 163 genotypes in 2021 and 181 genotypes in 2022, including two susceptible checks, Taichung-176 and Manjushree-2. Rice genotypes were screened for resistance following the rice standard evaluation system (SES) scale (1). Disease scoring was performed qualitatively at two stages: first at tillering for leaf blast and second at maturity for neck blast. 163 genotypes were scored in 2021 and 181 genotypes were screened in 2022. Among them, 114 genotypes were tested in both years, while 49 and 64 genotypes were unique to the years 2021 and 2022 respectively. Altogether, 227 genotypes were screened for blast resistance in two years. Results showed that out of 114 recurring genotypes, only 16 genotypes for neck blast and 35 genotypes for leaf blast showed the same resistance level in both years. The information revealed from this study could be helpful for rice blast disease management and utilizing these resistant and moderately resistant genotypes for further resistance breeding programs.
Wavelength Dependence of Image Quality Metrics and Seeing Parameters and their Relation to Adaptive Optics Performance
Creators: name: Kamlah, Robert
name: Verma, Meetu
name: Diercke, Andrea
name: Denker, Carsten
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Ground-based solar observations are severely affected by Earth's turbulent atmosphere. As a consequence, observed image quality and prevailing seeing conditions are closely related. Partial correction of image degradation is nowadays provided in real-time by adaptive optics (AO) systems. In this study, different metrics of image quality are compared with parameters characterizing the prevailing seeing conditions, i.e., Median Filter Gradient Similarity (MFGS), Median Filter Laplacian Similarity (MFLS), Helmli-Scherer mean, granular rms-contrast, differential image motion, and Fried-parameter r0. The quiet-Sun observations at disk center were carried out at the Vacuum Tower Telescope (VTT), Observatorio del Teide (OT), Izana, Tenerife, Spain. In July and August 2016, time-series of short-exposure images were recorded with the High-resolution Fast Imager (HiFI) at various wavelengths in the visible and near-infrared parts of the spectrum. Correlation analysis yields the wavelength dependence of the image quality metrics and seeing parameters, and Uniform Manifold Approximation and Projection (UMAP) is employed to characterize the seeing on a particular observing day. In addition, the image quality metrics and seeing parameters are used to determine the field-dependence of the correction provided by the AO system. Management of high-resolution imaging data from large-aperture, ground-based telescopes demands reliable image quality metrics and meaningful characterization of prevailing seeing conditions and AO performance. The present study offers guidance how to retrieve such information ex post facto.
description: 30 pages, 13 figure, 2 tables, accepted to be published in Solar Physics
On homeomorphisms and quasi-isometries of the real line
Creators: name: Sankaran, Parameswaran
Publisher: name: arXiv
Year: 2006
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 20F65, 20F28

description: We show that the group of all pl-homeomorphisms of the reals having bounded slopes surjects on the group $QI({\Bbb R})$ of all quasi-isometries of ${\Bbb R}$. We prove that the following groups can be imbedded in $QI({\Bbb R})$: The group of compactly supported pl-homeomorphisms of the reals, the Richard Thompson group F, and the free group of rank the continuum.
description: 9 pages
Ground Experiments and Performance Evaluation of the Low-Frequency Radio Spectrometer Onboard the Lander of Chang'e-4 Mission
Creators: name: Zhu, Xinying
name: Su, Yan
name: Ji, Yicai
name: Zhang, Hongbo
name: Zhao, Bo
name: Xue, Xiping
name: Dai, Shun
name: Li, Junduo
name: Li, Chunlai
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Low-Frequency Radio Spectrometer (LFRS) is a scientific payload onboard the Chang'e-4 lunar lander launched in December 2018. The LFRS provides in-situ measurements of the low-frequency radio phenomena on the far-side of the Moon for the first time in human history. To evaluate the performance of the LFRS, a series of ground experiments are conducted using a prototype model of the LFRS. It is not easy to perform the experiments because the EMI \footnote{ Abbreviation: EMI, Electro Magnetic Interference} from the Chang'e-4 lunar lander itself and the environment is very intense. The results after EMI mitigation show that the sensitivity of the LFRS may be 1e-18Wm^2Hz^-1.
description: 10 pages, 8 figures, 2 tables