cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Structural equation modeling and partial least squares elucidate cortical substrates of trail making test performance

Creators: name: Herron, Timothy
name: Wyma, John
name: E. William Yund
name: Xiaojian Kang
name: Woods, David
Publisher: name: F1000Research
Year: 2015

description: We deconstructed adult completion times on three computerized trail-making tests (TMT) to examine the correlations of isolated ability subcomponents with several MRI cortical anatomy quantities. The three TMT tests had a hierarchical design and all required item selection with the mouse. A click-the-dots test was used to estimate the speed and precision of mouse control. Trails A (TrA) was used to estimate the efficiency of sequencing and visual search. Finally, Trails B (TrB) was used to estimate the efficiency of task switching/shifting. Pericortical brain anatomy was quantified using T1 (gray matter area and thickness), white matter Fractional Anisotropy, and white matter Magnetization Transfer Ratio images. We wished to test whether a heirarchical behavioral analysis (unlike factor analysis) could help enhance behavior-anatomy relationships. From each of the three computerized trails subtests, three mean component scores were obtained: mouse/cursor velocity, path straightness between node pairs, and hold time after clicking a circle. A structural equation model (SEM) was applied to compute the best hierarchically organized linear dependencies between demographic variables and all Trails subtest quantities.

Traditional trails metric correlation analysis suggested that several areas were associated with TrA completion times but identified no areas specifically related to TrB-TrA completion-time differences. In contrast, partial least squares (PLS) analysis of anatomical properties and behavioral components isolated by SEM revealed the critical role of some structures.  For example, two of the strongest components identified by PLS match those implied by functional meta-analyses: the correlation of superior parietal area with visual search and sequencing (in TrA), and the correlation of superior and inferior frontal pericortical WM FA values with task switching/shifting (in TrB). Multilevel SEM behavioral models combined with demography-adjusted MRI structural measures can enhance the sensitivity of relating brain anatomy to behavior using PLS.
[Uyghur deictics]
Creators: name: Moore, Kevin
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: uig

description: Two drafts of a term paper by Kevin Moore for Linguistics 240B (Field Methods) in Spring 1993: (1) a first draft entitled "Uyghur deictic words and the meaning of šu, which is one of them" dated February 20, 1993; (2) a final draft entitled "A part of the Uighur deictic system and its relevance to discourse" dated May 18, 1993.
Kohn-Sham calculations combined with an average pair-density functional theory
Creators: name: Gori-Giorgi, Paola
name: Savin, Andreas
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: A recently developed formalism in which Kohn-Sham calculations are combined with an ``average pair density functional theory'' is reviewed, and some new properties of the effective electron-electron interaction entering in this formalism are derived. A preliminary construction of a fully self-consitent scheme is also presented in this framework.
description: submitted to Int. J. Mod. Phys. B (proceedings of the 30th International Workshop on Condensed Matter Theories)
Model independent reconstruction of cosmological accelerated-decelerated phase
Creators: name: Capozziello, Salvatore
name: Dunsby, Peter K. S.
name: Luongo, Orlando
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We propose two model independent methods to obtain constraints on the transition and equivalence redshifts $z_{tr}$, $z_{eq}$. In particular, we consider $z_{tr}$ as the onset of cosmic acceleration, whereas $z_{eq}$ the redshift at which the densities of dark energy and pressureless matter are equated. With this prescription, we expand the Hubble and deceleration parameters up to two hierarchical orders and show a linear correlation between transition and equivalence, from which we propose exclusion plots where $z_{eq}$ is not allowed to span. To this end, we discuss how to build up cosmographic expansions in terms of $z_{tr}$ and compute the corresponding observable quantities directly fitting the luminosity and angular distances and the Hubble rate with cosmic data. We make our computations through Monte Carlo fits involving type Ia supernova, baryonic acoustic oscillation and Hubble most recent data catalogs. We show at $1σ$ confidence level the $Λ$CDM predictions on $z_{tr}$ and $z_{eq}$ are slightly confirmed, although at $2σ$ confidence level dark energy expectations cannot be excluded. Finally, we theoretically interpret our outcomes and discuss possible limitations of our overall approach.
description: 17 pages, 11 figures, 3 tables, Accepted for publication in MNRAS
A Parallel Algorithm for Evaluating General Linear Recurrence Equations
Creators: name: Lu, Mi
Publisher: name: figshare
Year: 2021
Subjects: subject: 80201 Analysis of Algorithms and Complexity
subject: FOS: Computer and information sciences
subject: 80302 Computer System Architecture

description: A block parallel partitioning method for evaluating general linear mth order recurrence equations is presented and applied to solve the eigenvalues of symmetric tridiagonalmatrices. The algorithm is based on partitioning, in a way that ensures load balance during computation. This method is applicable to both shared memory and distributedmemory MIMD systems. The algorithm achieves a speedup of O (p) on a parallel computer with p-fold parallelism, which is linear and is greater than the existing results, and the datacommunication between processors is less than that required for other methods. For solving symmetric tridiagonal eigenvalue problems, our method is faster than the best previous results. The results were tested and evaluated on an MIMD machine, and were within 79%to 96% of the predicted performance for the second order linear recurrence problem.
Structure theorems for linear and non-linear differential operators admitting invariant polynomial subspaces
Creators: name: Gomez-Ullate, David
name: Kamran, Niky
name: Milson, Robert
Publisher: name: arXiv
Year: 2006
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: In this paper we derive structure theorems that characterize the spaces of linear and non-linear differential operators that preserve finite dimensional subspaces generated by polynomials in one or several variables. By means of the useful concept of deficiency, we can write explicit basis for these spaces of differential operators. In the case of linear operators, these results apply to the theory of quasi-exact solvability in quantum mechanics, specially in the multivariate case where the Lie algebraic approach is harder to apply. In the case of non-linear operators, the structure theorems in this paper can be applied to the method of finding special solutions of non-linear evolution equations by nonlinear separation of variables.
description: 23 pages, typed in AMS-LaTeX
Branes, fermions, and superspace dualities
Creators: name: Retolaza, Ander
name: Rogers, Jamie
name: Tatar, Radu
name: Tonioni, Flavio
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We use the superspace formulation of supergravity in eleven and ten dimensions to compute fermion couplings on the M2-brane and on D$p$-branes. In this formulation fermionic couplings arise naturally from the $θ$-expansion of the superfields from which the brane actions are constructed. The techniques we use and develop can in principle be applied to determine the fermionic couplings to general background fields up to arbitrary order. Starting with the superspace formulation of 11-dimensional supergravity, we use a geometric technique known as the `normal coordinate' method to obtain the $θ$-expansion of the M2-brane action. We then present a method which allows us to translate the knowledge of fermionic couplings on the M2-brane to knowledge of such couplings on the D2-brane, and then to any D$p$-brane. This method is based on superspace generalizations of both the compactification taking 11-dimensional supergravity to type IIA supergravity and the T-duality rules connecting the type IIA and type IIB supergravities.
description: 47 Pages + Appendices, 2 Figures. V2: References added, minor corrections. V3: version published in JHEP with improvements to section 4.2 and minor corrections
The Shape of Instantons : Cross-Section of Supertubes and Dyonic Instantons
Creators: name: Chen, Heng-Yu
name: Eto, Minoru
name: Hashimoto, Koji
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We explore the correspondence between Yang-Mills instantons and algebraic curves. The curve is defined by Higgs zero locus of dyonic instantons in 1+4 dimensional Yang-Mills-Higgs theory, and it is identified in string theory with the cross-section of supertubes connecting parallel D4-branes. To present evidence for the identification, we show that with total charges fixed, the supertube angular momentum computed from the Higgs zero locus is maximized when the locus is circular, which has been proven for the cross-section of the supertubes. This leads to a consistent dictionary between the charges in two pictures. We also consider a T-dual version of the story, identifying the profiles of the wavy instanton strings with those of the supercurves/D-helices. Based on this observation, we then argue a novel correspondence between ADHM data of instantons and algebraic curves defining the locus. The degree of the curve is related to the instanton number, and splitting property of the curve is physically manifested by well-separated instantons.
description: 28 pages, 7 figures; a reference added
Relying on a rate constraint to reduce Motion Estimation complexity
Creators: name: Sant'Anna, Gabriel B.
name: Cancellier, Luiz Henrique
name: Seidel, Ismael
name: Grellert, Mateus
name: Güntzel, José Luís
Publisher: name: arXiv
Year: 2021
Subjects: subject: Image and Video Processing (eess.IV)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper proposes a rate-based candidate elimination strategy for Motion Estimation, which is considered one of the main sources of encoder complexity. We build from findings of previous works that show that selected motion vectors are generally near the predictor to propose a solution that uses the motion vector bitrate to constrain the candidate search to a subset of the original search window, resulting in less distortion computations. The proposed method is not tied to a particular search pattern, which makes it applicable to several ME strategies. The technique was tested in the VVC reference software implementation and showed complexity reductions of over 80% at the cost of an average 0.74% increase in BD-Rate with respect to the original TZ Search algorithm in the LDP configuration.
description: 5 pages, 4 figures, accepted for publication in ICASSP 2021
Photon induced atom recoil in collectively interacting planar arrays
Creators: name: Suresh, Deepak A.
name: Robicheaux, F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The recoil of atoms in arrays due to the emission or absorption of photons is studied for sub-wavelength interatomic spacing. The atoms in the array interact with each other through collective dipole-dipole interactions and with the incident laser field in the low intensity limit. Shining uniform light on the array gives rise to patterns of excitation and recoil in the array. These arise due to the interference of different eigenmodes of excitation. The relation between the recoil and the decay dynamics is studied when the array is in its excitation eigenstates. The recoil experienced by a subradiant collective decay is substantially larger than from independent atom decay. A method to calculate the rate of recoil when steady state has been achieved with a constant influx of photons is also described.
description: 13 pages, 6 figures
De Sitter stability in quadratic gravity
Creators: name: Toporensky, A. V.
name: Tretyakov, P. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Quadratic curvature corrections to Einstein-Hilbert action lead in general to higher-order equations of motion, which can induced instability of some unperturbed solutions of General Relativity. We study conditions for stability of de Sitter cosmological solution. We argue that simple form of this condition known for FRW background in 3+1 dimensions changes seriously if at least one of these two assumptions is violated. In the present paper the stability conditions for de Sitter solution have been found for multidimensional FRW background and for Bianchi I metrics in 3+1 dimensions.
description: 12 pages with 4 figures; references added
Παράσταση γλωσσολογικού συναισθηματικού περιεχομένου με χρήση υπολογιστικής νοημοσύνης
Creators: name: Μαγιώνας, Οδυσσέας Σ.
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Διανυσματική αναπαράσταση
Κατηγοριοποίηση συναισθήματος
Ενσωμάτωση λέξεων
Vector Representation
Sentiment Analysis
Word Embedding

description: Στην παρούσα διπλωματική, θα έρθουμε αντιμέτωποι με διάφορες τέτοιες τεχνικές εξαγωγής χαρακτηριστικών, κυρίως από τον χώρο του NLP, στην προσπάθεια μας να προ-επεξεργαστούμε ακατέργαστο κείμενο που προέρχεται από το Twitter και να εξάγουμε χαρακτηριστικά. Τα χαρακτηριστικά αυτά, μεταγενέστερα θα χρησιμοποιηθούν από ένα υπολογιστικό μοντέλο κατηγοριοποιήσης συναισθήματος για να λάβουμε τελικά την απόκριση, αν το κείμενο είναι θετικό, αρνητικό ή ουδέτερο. Συγκεκριμένα, χρησιμοποιούνται τρεις διαφορετικές μέθοδοι ενσωμάτωσης λέξεων (FastText, GloVe, Word2vec), πληθώρα αριθμητικών χαρακτηριστικών που προέκυψαν από την προ-επεξεργασία των αρχικών κειμένων, συνδυασμοί διάφορων Lexicons, μέθοδοι εξαγωγής μερών του λόγου ως χαρακτηριστικά (POS Tagging), εκμετάλλευση συναισθηματικής πληροφορίας από τα Emoticons και αξιοποίηση χαρακτηριστικών προερχόμενων από την ολοκληρωμένη βιβλιοθήκη συναισθηματικής κατηγοριοποίησης του Stanford, μέσω του εργαλείου του, Stanford Sentiment Treebank. Λέξεις κλειδιά: Διανυσματική αναπαράσταση, Κατηγοριοποίηση συναισθήματος, ενσωμάτωση λέξεων, Word2vec, GloVe, FastText, POS Tagging, Stanford Sentiment Treebank, Lexicons
description: In this thesis, we will be confronted with a number of such feature extraction techniques, mainly from the domain of NLP, in our effort to pre-process raw text coming from Twitter and export features. These features will later be used by a computational model of sentiment classification to finally get the response if the text is positive, negative or neutral. In particular, they have been used three different word embedding methods (FastText, GloVe, Word2vec), a variety of numerical features derived from the pre-processing of the original texts, combinations of various Lexicons, methods of extracting parts of speech as features (POS Tagging), exploitation of semantic information from Emoticons and the exploitation of features derived from Stanford's integrated semantic classification library, through its Stanford Sentiment Treebank tool. Keywords: Vector Representation, Sentiment Analysis, Word Embeddings, Word2vec, GloVe, FastText, POS Tagging, Stanford Sentiment Treebank, Lexicons
description: Σε συνεργασία με: Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)
Sea-quark flavor asymmetry in the nucleon from a relativistic analysis of the Drell-Yan scattering off nuclei
Creators: name: Molochkov, A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is shown that accounting for the relativistic structure of the deuteron allows to explain the ratio of the Drell-Yan pair production cross-section at the low Bjorken $x$ off the deuteron and the proton. Thus, the sea quark distributions in the nucleon should be studied with accounting for the effects of the relativistic structure of the deuteron. The suggested approach reduces theoretical uncertainty in extracting the ratio $\bar u/\bar d$ from the data and it is important for the clarification of the nature of the sea quark asymmetry in the nucleon.
description: 4 pages, 1 figures, Chiral Symmetry in Hadron and Nuclear Physics November 13-16, 2007, Osaka
Estimating galaxy masses from kinematics of globular cluster systems: a new method based on deep learning
Creators: name: Kaur, Rajvir
name: Bekki, Kenji
name: Hassan, Ghulam Mubashar
name: Datta, Amitava
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We present a new method by which the total masses of galaxies including dark matter can be estimated from the kinematics of their globular cluster systems (GCSs). In the proposed method, we apply the convolutional neural networks (CNNs) to the two-dimensional (2D) maps of line-of-sight-velocities ($V$) and velocity dispersions ($σ$) of GCSs predicted from numerical simulations of disk and elliptical galaxies. In this method, we first train the CNN using either only a larger number ($\sim 200,000$) of the synthesized 2D maps of $σ$ ("one-channel") or those of both $σ$ and $V$ ("two-channel"). Then we use the CNN to predict the total masses of galaxies (i.e., test the CNN) for the totally unknown dataset that is not used in training the CNN. The principal results show that overall accuracy for one-channel and two-channel data is 97.6\% and 97.8\% respectively, which suggests that the new method is promising. The mean absolute errors (MAEs) for one-channel and two-channel data are 0.288 and 0.275 respectively, and the value of root mean square errors (RMSEs) are 0.539 and 0.51 for one-channel and two-channel respectively. These smaller MAEs and RMSEs for two-channel data (i.e., better performance) suggest that the new method can properly consider the global rotation of GCSs in the mass estimation. We also applied our proposed method to real data collected from observations of NGC 3115 to compare the total mass predicted by our proposed method and other popular methods from the literature.
description: Accepted by MNRAS
Causal interactions and delays in a neuronal ensemble
Creators: name: Marinazzo, Daniele
name: Pellicoro, Mario
name: Stramaglia, Sebastiano
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We analyze a neural system which mimics a sensorial cortex, with different input characteristics, in presence of transmission delays. We propose a new measure to characterize collective behavior, based on the nonlinear extension of the concept of Granger causality, and an interpretation is given of the variation of the percentage of the causally relevant interactions with transmission delays.
description: 7 pages, 3 figures. To appear in the AIP seminar notes of 9th Granada seminar on Computational Physics: Computational and Mathematical Modeling of Cooperative Behavior in Neural Systems
Symbols and Abbreviations for Editing Scientific Texts
Creators: name: H.A. (Hajo) Reijers
Publisher: name: Utrecht University
Year: 2021
Subjects: subject: 200302 English Language
subject: FOS: Languages and literature
subject: 190303 Technical Writing
subject: FOS: Media and communications

description: Scientists spend considerable time on editing manuscripts of their peers and students. To make this task a little bit more efficient, I propose a set of symbols and abbreviations that can be used as shorthands to identify problematic parts in such manuscripts. The shorthands cover frequently recurring issues with respect to grammar, style, and flow. This document serves as a legend to both the editor and the author of manuscripts to which the symbols and abbreviations are applied.
The Effect of Weekend Curfews on Epidemics: A Monte Carlo Simulation
Creators: name: Kaygusuz, Hakan
name: Berker, A. Nihat
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The ongoing COVID-19 pandemic is being responded with various methods, applying vaccines, experimental treatment options, total lockdowns or partial curfews. Weekend curfews is one of the methods to reduce the amount of infected persons and this method is practically applied in some countries such as Turkey. In this study, the effect of weekend curfews on reducing the spread of a contagious disease, such as COVID-19, is modeled using a Monte Carlo algorithm with a hybrid lattice model. In the simulation setup, a fictional country with three towns and 26,610 citizens were used as a model. Results indicate that applying a weekend curfew reduces the active cases significantly and is one of the efficient ways to fight the epidemic. The results also show that applying personal precautions such as social distancing is important for reducing the number of cases and deaths.
description: Published version, 14 pages, 6 figures
Rotating Einstein-Maxwell-Dilaton Black Holes in D Dimensions
Creators: name: Kunz, Jutta
name: Maison, Dieter
name: Navarro-Lerida, Francisco
name: Viebahn, Jan
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We construct exact charged rotating black holes in Einstein-Maxwell-dilaton theory in $D$ spacetime dimensions, $D \ge 5$, by embedding the $D$ dimensional Myers-Perry solutions in $D+1$ dimensions, and performing a boost with a subsequent Kaluza-Klein reduction. Like the Myers-Perry solutions, these black holes generically possess $N=[(D-1)/2]$ independent angular momenta. We present the global and horizon properties of these black holes, and discuss their domains of existence.
description: 12 pages, 6 figues
On-line longest fragment first parsing algorithm
Creators: name: Lu, Mi
Publisher: name: figshare
Year: 2021
Subjects: subject: 80201 Analysis of Algorithms and Complexity
subject: FOS: Computer and information sciences

description: The central part of dictionary type data compression is the process of parsing the input string into phrases that are top be replaced with the corresponding dictionary indexes. In this article, we study the longest fragment first (LFF) parsing strategy for static dictionary compression. We present an on-line algorithm for LFF parsing that requires lookahead of length O(L2), where L is the maximum length of the dictionary entries.
Close encounters in young stellar clusters: implications for planetary systems in the solar neighbourhood
Creators: name: Malmberg, Daniel
name: De Angeli, Francesca
name: Davies, Melvyn B.
name: Church, Ross P.
name: Mackey, Dougal
name: Wilkinson, Mark I.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The stars that populate the solar neighbourhood were formed in stellar clusters. Through N-body simulations of these clusters, we measure the rate of close encounters between stars. By monitoring the interaction histories of each star, we investigate the singleton fraction in the solar neighbourhood. A singleton is a star which formed as a single star, has never experienced any close encounters with other stars or binaries, or undergone an exchange encounter with a binary. We find that, of the stars which formed as single stars, a significant fraction are not singletons once the clusters have dispersed. If some of these stars had planetary systems, with properties similar to those of the solar system, the planets orbits may have been perturbed by the effects of close encounters with other stars or the effects of a companion star within a binary. Such perturbations can lead to strong planet-planet interactions which eject several planets, leaving the remaining planets on eccentric orbits. Some of the single stars exchange into binaries. Most of these binaries are broken up via subsequent interactions within the cluster, but some remain intact beyond the lifetime of the cluster. The properties of these binaries are similar to those of the observed binary systems containing extra-solar planets. Thus, dynamical processes in young stellar clusters will alter significantly any population of solar-system-like planetary systems. In addition, beginning with a population of planetary systems exactly resembling the solar system around single stars, dynamical encounters in young stellar clusters may produce at least some of the extra-solar planetary systems observed in the solar neighbourhood.
description: 11 pages, 9 figures, 1 table. Accepted for publication in MNRAS
title: Can Pastoral Communities Offer Sustainable Ecological Management Solutions? The case of Mwanda-Marungu Pastoral Commons in Taita Hills, Kenya
Creators: name: Mwamidi, Daniel
name: Dominguez, Pablo
Publisher: name: UMR 5602 CNRS/UT2J GEODE Géographie De l'Environnement 5 All. A. Machado 31058 Toulouse France
Year: 2020
Subjects: subject: FOS: Humanities
valueUri: http://www.oecd.org/science/inno/38235147.pdf

description: There has been increased interest over the last decades on community based management of natural resources (CBMNR) and their relation to environmental sustainability. Insufficient studies dedicated in Kenya to understand pastoral communities’ management is striking, considering the importance of communal management for pastoralism and of pastoralism in Kenya. This research has been set up to conduct a study of customary management of relatively well functioning pastoral commons of East Africa, the Mwanda-Marungu commons which borders Tsavo west national park in Taita hills, south-west of Kenya. Through ethnographic approaches such as participant observation, semi-structured interviews and focus group with discussions of up to 234 respondents, it was examined whether customary management systems of Mwanda-Marungu would offer sustainable model that conforms to the IUCN’s Other Effective area-based Conservation Measures (OECMs) and where not, as well as why and which were the sources of possible malfunctioning. Among others the results showed that these pastoral commons assure a generalized local rule requiring that all herders and livestock should have left water points and salt lick areas by 3pm so as to pave way for the wildlife to drink water and lick salt as well in order to avoid illnesses transmission and favoring humans-wildlife co-existence within the commons. Also there are important restrictions on charcoal burning and fires within commons as well as the use of religious shrines called fighis that all together help to conserve forests and pastoral habitats, which are absent in other areas where private plot selling and mining has started to come in and degradation is much stronger. This study demonstrates that pastoral communities in this area have devised ingenious measures that prove good management of natural resources within their commons aligned to the principals of OECMs and they could be considered for support, since where they disappear environmental degradation tends to appear.
Continuous variable multipartite vibrational entanglement
Creators: name: Abdi, Mehdi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A compact scheme for the preparation of macroscopic multipartite entanglement is proposed and analyzed. In this scheme the vibrational modes of a mechanical resonator constitute continuous variable (CV) subsystems that entangle to each other as a result of their interaction with a two-level system (TLS). By properly driving the TLS, we show that a selected set of modes can be activated and prepared in a multipartite entangled state. We first study entanglement properties of a three-mode system by evaluating the genuine multipartite entanglement. And investigate its usefulness as a quantum resource by computing the quantum Fisher information. Moreover, the robustness of the state against the qubit and thermal noises is studied, proving a long-lived entanglement. To examine the scalability and structural properties of the scheme, we derive an effective model for the multimode system through elimination of the TLS dynamics. This work provides a step towards a compact and versatile device for creating multipartite noise-resilient entangled state in vibrational modes as a resource for CV quantum metrology, quantum communication, and quantum computation.
Το Ναυάγιο στη Νεοελληνική Λογοτεχνία
Creators: name: Παπαστόικα, Χριστίνα Παναγιώτη
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ναυάγιο
Νεοελληνική Λογοτεχνία
Φιλοσοφική Σχολή
Shipwreck
Modern Greek Literature
school of Philosophy

description: Στόχος της παρούσας εργασίας είναι να εξεταστεί το μοτίβο του ναυαγίου στη νεοελληνική λογοτεχνία. Με τον όρο ναυάγιο εννοούμε την κυριολεκτική του χρήση, η οποία αφορά τη βύθιση και τη συντριβή ενός πλοίου με την απώλεια ανθρώπινων ζωών ή την διάσωσή τους. Αρχικά, παρατίθεται το θεωρητικό πλαίσιο, στο οποίο γίνεται η παρουσίαση του μοτίβου του θαλασσινού ναυαγίου σε ευρωπαϊκό επίπεδο. Πιο συγκεκριμένα, εξετάζεται το ναυάγιο στη γαλλική, στη γερμανική, στην αγγλική, στην πορτογαλική και στην ιταλική λογοτεχνία, για να δοθεί μια εικόνα της λειτουργικής αξιοποίησής του σε άλλες λογοτεχνίες, ώστε να περάσουμε στη συνέχεια στην ελληνική γραμματεία. Έπειτα, στο πλαίσιο της νεοελληνικής λογοτεχνίας εξετάζονται με χρονολογική σειρά διηγήματα ρομαντικά, ηθογραφικά, μεσοπολεμικά και μεταπολεμικά, μέσα στα οποία εντοπίζεται η χρήση του ναυαγίου. Τέλος, καταλήγουμε στο συμπέρασμα ότι υπάρχουν αρκετές ερμηνείες σχετικά με το ναυάγιο στην ελληνική λογοτεχνία, οι οποίες θα μπορούσαν να αποτελέσουν τη βάση για περαιτέρω έρευνα.
description: The aim of this thesis is the study of the shipwreck pattern in the Modern Greek literature. The term shipwreck has the strict sense, which refers to a crash of a boat and the loss of human lives or their rescue. To begin with, the theoretical framework presents the marine shipwreck pattern in the European literature, specifically the French, German, English, Portuguese and Italian literature, in order for a meaningful concept to be given. This review constitutes the introduction to the shipwreck pattern in the Greek literature. Consequently, as far as in the Modern Greek literature is concerned, the use of the shipwreck is examined in a chronological order through various romantic, ethographic stories, as well as stories written before and after the Second World War. In short, we conclude that there are several usages of the shipwreck in the Greek literature, which could be served for further research.
Pocket resonances in low-energy antineutrons reactions with nuclei
Creators: name: Lee, Teck-Ghee
name: Bayrak, Orhan
name: Wong, Cheuk-Yin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Upon investigating whether the variation of the antineutron-nucleus annihilation cross-sections at very low energies satisfy Bethe-Landau's power law of $σ_{\rm ann} (p) \propto 1/p^α$ behavior as a function of the antineutron momentum $p$, we uncover unexpected regular oscillatory structures in the low antineutron energy region from 0.001 to 10 MeV, with small amplitudes and narrow periodicity in the logarithm of the antineutron energies, for large-$A$ nuclei such as Pb and Ag. Subsequent semiclassical analyses of the $S$ matrices reveal that these oscillations are pocket resonances that arise from quasi-bound states inside the pocket and the interference between the waves reflecting inside the optical potential pockets with those from beyond the potential barriers, implicit in the nuclear Ramsauer effect. They are the continuation of bound states in the continuum. Experimental observations of these pocket resonances will provide vital information on the properties of the optical model potentials and the nature of the antineutron annihilation process.
description: 10 pages, 5 figures
Localization in a strongly disordered system: A perturbation approach
Creators: name: Frasca, Marco
Publisher: name: arXiv
Year: 2006
Subjects: subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: High Energy Physics - Theory (hep-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We prove that a strongly disordered two-dimensional system localizes with a localization length given analytically. We get a scaling law with a critical exponent is $ν=1$ in agreement with the Chayes criterion $ν\ge 1$. The case we are considering is for off-diagonal disorder. The method we use is a perturbation approach holding in the limit of an infinitely large perturbation as recently devised and the Anderson model is considered with a Gaussian distribution of disorder. The localization length diverges when energy goes to zero with a scaling law in agreement to numerical and theoretical expectations.
description: 5 pages, no figures. Version accepted for publication on International Journal of Modern Physics B
The comparison of the bacterial flora of gastrointestinal tract in patients with type 2 diabetes mellitus and HNF1A- MODY diabetes
Creators: name: Mrozińska, Sandra
Publisher: name: F1000Research
Year: 2015

description: The aim of the study is to compare the qualitative parameters of the gastrointestinal flora in patients with HNF1A-MODY diabetes and T2DM.
We failed to show statistically significant differences in the profile of intestinal flora between not optimally controlled patients with HNF 1A MODY and T2DM.
Minimality Notions via Factorization Systems
Creators: name: Wißmann, Thorsten
Publisher: name: arXiv
Year: 2021
Subjects: subject: Formal Languages and Automata Theory (cs.FL)
subject: Discrete Mathematics (cs.DM)
subject: Category Theory (math.CT)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: For the minimization of state-based systems (i.e. the reduction of the number of states while retaining the system's semantics), there are two obvious aspects: removing unnecessary states of the system and merging redundant states in the system. In the present article, we relate the two aspects on coalgebras by defining an abstract notion of minimality. The abstract notion minimality and minimization live in a general category with a factorization system. We will find criteria on the category that ensure uniqueness, existence, and functoriality of the minimization aspects. The proofs of these results instantiate to those for reachability and observability minimization in the standard coalgebra literature. Finally, we will see how the two aspects of minimization interact and under which criteria they can be sequenced in any order, like in automata minimization.
Η καταχρηστική εκμετάλλευση δεσπόζουσας θέσης στο πλαίσιο του Ευρωπαϊκού Δικαίου Ανταγωνισμού (άρθρο 102 ΣΛΕΕ)-Η έννοια της κατάχρησης
Creators: name: Σπύρου, Χριστίνα Σπυρίδωνος
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: κατάχρηση
δεσπόζουσα
ανταγωνισμός
abuse
dominant
competition

description: Αντικείμενο της διπλωματικής εργασίας αποτελεί η ανάλυση του περιεχομένου του άρθρου 102 ΣΛΕΕ, το οποίο αναφέρεται στην καταχρηστική εκμετάλλευση της δεσπόζουσας θέσης μιας επιχείρησης. Σκοπός της εργασίας είναι η έρευνα των προϋποθέσεων υπό τις οποίες οι πρακτικές των επιχειρήσεων, που κατέχουν δεσπόζουσα θέση σε μια αγορά, θεωρούνται καταχρηστικές και άρα απαγορεύονται καθώς και η ερμηνεία του άρθρου 102 ΣΛΕΕ από την Ευρωπαϊκή Επιτροπή και το Δικαστήριο της Ευρωπαϊκής Ένωσης. Αρχικά, εξετάζεται η έννοια της δεσπόζουσας θέσης και τα κριτήρια της καταχρηστικής της άσκησης. Στη συνέχεια, γίνεται αναφορά σε ορισμένες από τις βασικότερες μορφές καταχρήσεων, οι οποίες διακρίνονται σε καταχρήσεις τιμολογιακού και μη τιμολογιακού χαρακτήρα. Το τελευταίο μέρος της διπλωματικής εργασίας αφιερώνεται στα συμπεράσματα. Η καταχρηστική εκμετάλλευση της δεσπόζουσας θέσης είναι ενδιαφέρον ζήτημα, ιδιαίτερα στη σύγχρονη εποχή, που ο ανταγωνισμός σε παγκόσμιο επίπεδο είναι έντονος. Είναι, συνεπώς, απαραίτητη η βελτίωση της προστασίας του αποτελεσματικού ανταγωνισμού και η διαφύλαξη των συμφερόντων των καταναλωτών
description: The subject of this thesis is the analysis of the content of article 102 TFEU, which refers to the abuse of a company’s dominant position. The purpose of the thesis is to examine the conditions under which the practices of companies that hold a dominant position are considered abusive and are therefore prohibited, as well as the interpretation of article 102 TFEU by the European Commission and the European Court of Justice. Initially, the concept of dominance and the criteria of abusive practice are examined. Furthermore, reference is made to certain important forms of abuse, which are divided into price based and non-price based abuses. In the final part conclusions are drawn based on the analysis previously done. Abuse of dominant position is an important issue especially today when competition at a global level is intense. It is therefore necessary to improve the protection of effective competition and the safeguarding of consumer interests
The language of deceit: are there reliable verbal clues to deception in the interrogation context?
Creators: name: Porter, Stephen B.
Publisher: name: University of British Columbia
Year: 2009

description: In recent years, the need for enhanced methods of credibility assessment in criminal cases has become illuminated. Especially in cases of sexual assault, the words of the accused and complainant are often the sole evidence available to police. Consequently, researchers and practitioners have been searching for ways of differentiating truthful and deceptive accounts, focussing mainly on witnesses and victims. With its recent history, however, assessment based on verbal clues has been somewhat myopic and not well grounded in theory or integration. This thesis examined a general hypothesis, based upon conceptual information from a variety of perspectives, that reliable verbal indicators of deception exist in the interrogation situation. Sixty undergraduates were recruited for participation in research addressing “security effectiveness.” Participants either committed a theft “to test the effectiveness of a new security guard” or carried out a similar but innocuous task. They were then asked to provide either: (1)a truthful alibi (2)a partially deceptive account (3)a completely false alibi or (4)a truthful confession regarding the theft to “an interviewer also hired for the purpose of investigating thefts.” To increase motivation in the interview, honest and dishonest participants were offered a monetary incentive for convincing the interrogator of their veracity. The accounts were then transcribed and examined for the presence of eighteen language variables. A multivariate analysis of variance (MANOVA) revealed a profile of three variables which significantly differentiated the truthful and deceptive accounts (amount of detail reported, coherence of the account, and admissions of lack of memory). For example, dishonest participants provided much less detail (although not fewer words) in relating an event than truthful participants describing a similar event. Implications for credibility assessment in forensic interrogations are discussed, emphasizing the need for establishing external validity with eclectic research strategies.
A Direct Approach for Finding Loop Transformation Matrices
Creators: name: Lu, Mi
Publisher: name: figshare
Year: 2021
Subjects: subject: Theoretical Computer Science
subject: 80302 Computer System Architecture
subject: FOS: Computer and information sciences

description: Loop transformations, such as loop interchange, reversal and skewing, have been unified under linear matrix transformations. A legal transformation matrix is usually generated based upon distance vectors may not be computable and direction vectors. Unfortunately, for some nested loops, distance vectors may not be computable and direction vectors, on the other hand, may not contain useful information. We propose the use of linear equations or inequalities of distance vectors to approximate the data dependence. This approach is advantageous since (1) many logos having no constant distance vectors have very simple equations of distance vectors; (2) these equations contain more information than direction vectors do, thus chance of exploiting potential parallelism is improved.
In general, the equations or inequalities that approximate the data dependence of a given nested loop is not unique hence classification is discussed for the purpose of loop transformation. Efficient algorithms are developed to generate all kinds of linear equations of distance vectors for a given nested loop. The issue of how to obtain a desired transformation matrix from those equations is also addressed.
On the Predictive Power of Chemical Concepts
Creators: name: Grimmel, Stephanie A.
name: Reiher, Markus
Publisher: name: arXiv
Year: 2021
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Many chemical concepts can be well defined in the context of quantum chemical theories. Examples are the electronegativity scale of Mulliken and Jaffe and the hard and soft acids and bases concept of Pearson. The sound theoretical basis allows for a systematic definition of such concepts. However, while they are often used to describe and compare chemical processes in terms of reactivity, their predictive power remains unclear. In this work, we elaborate on the predictive potential of chemical reactivity concepts, which can be crucial for autonomous reaction exploration protocols to guide them by first-principles heuristics that expoit these concepts.
description: 23 pages, 2 figures, 1 table
The variance of the CMB temperature gradient: a new signature of a multiply connected Universe
Creators: name: Aurich, Ralf
name: Buchert, Thomas
name: France, Martin J.
name: Steiner, Frank
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this work we investigate the standard deviation of the Cosmic Microwave Background (CMB) temperature gradient field as a signature for a multiply connected nature of the Universe. CMB simulations of a spatially infinite universe model within the paradigm of the standard cosmological model present non-zero two-point correlations at any angular scale. This is in contradiction with the extreme suppression of correlations at scales above $60^{\circ}$ in the observed CMB maps. Universe models with spatially multiply connected topology contain typically a discrete spectrum of the Laplacian with a specific wave-length cut-off and thus lead to a suppression of the correlations at large angular scales, as observed in the CMB (in general there can be also an additional continuous spectrum). Among the simplest examples are 3-dimensional tori which possess only a discrete spectrum. To date, the universe models with non-trivial topology such as the toroidal space are the only models that possess a two-point correlation function showing a similar behaviour as the one derived from the observed Planck CMB maps. In this work it is shown that the normalized standard deviation of the CMB temperature gradient field does hierarchically detect the change in size of the cubic 3-torus, if the volume of the Universe is smaller than $\simeq 2.5 \cdot 10^3$ Gpc$^3$. It is also shown that the variance of the temperature gradient of the Planck maps is consistent with the median value of simulations within the standard cosmological model. All flat tori are globally homogeneous, but are globally anisotropic. However, this study also presents a test showing a level of homogeneity and isotropy of all the CMB map ensembles for the different torus sizes considered that are nearly at the same weak level of anisotropy revealed by the CMB in the standard cosmological model.
description: 33 pages, 10 figures and 3 tables, matches published version in CQG
The Keck Planet Search: Detectability and the Minimum Mass and Orbital Period Distribution of Extrasolar Planets
Creators: name: Cumming, Andrew
name: Butler, R. Paul
name: Marcy, Geoffrey W.
name: Vogt, Steven S.
name: Wright, Jason T.
name: Fischer, Debra A.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We analyze 8 years of precise radial velocity measurements from the Keck Planet Search, characterizing the detection threshold, selection effects, and completeness of the survey. We carry out a systematic search for planets by assessing the false alarm probability associated with Keplerian orbit fits to the data. This allows us to understand the detection threshold for each star in terms of the number and time baseline of the observations, and size of measurement errors and stellar jitter. We show that all planets with orbital periods <2000 days, velocity amplitudes >20 m/s, and eccentricities <0.6 have been announced, and summarize the candidates at lower amplitudes and longer orbital periods. For the remaining stars, we calculate upper limits on the velocity amplitude of a companion, typically 10 m/s, and use the non-detections to derive completeness corrections at low amplitudes and long orbital periods. We give the fraction of stars with a planet as a function of planet mass and orbital period, and extrapolate to long period orbits and low planet masses. A power law fit for planet masses >0.3 Jupiter masses and periods <2000 days gives a mass-period distribution dN=C M^αP^βdlnM dlnP with α=-0.31 \pm 0.2, β=0.26\pm 0.1, and the normalization constant C such that 10.5% of solar type stars have a planet with mass in the range 0.3-10 Jupiter masses and orbital period 2-2000 days. The orbital period distribution shows an increase in the planet fraction by a factor of 5 for orbital periods beyond 300 days. Extrapolation gives 17-20% of stars having gas giant planets within 20 AU. Finally, taking into account differences in detectability, we find that M dwarfs are 3 to 10 times less likely to harbor a Jupiter mass planet than solar type stars.
description: 20 pages, 17 figures, accepted for publication in PASP