cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Efficient and accurate numerical-projection of electromagnetic multipoles for scattering objects
Creators: name: Guo, Wenfei
name: Cai, Zizhe
name: Xiong, Zhongfei
name: Chen, Weijin
name: Chen, Yuntian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: In this paper, we develop an efficient and accurate procedure of electromagnetic multipole decomposition by using the Lebedev and Gaussian quadrature methods to perform the numerical integration. Firstly, we briefly review the principles of multipole decomposition, highlighting two numerical projection methods including surface and volume integration. Secondly, we discuss the Lebedev and Gaussian quadrature methods, provide a detailed recipe to select the quadrature points and the corresponding weighting factor, and illustrate the integration accuracy and numerical efficiency (that is, with very few sampling points) using a unit sphere surface and regular tetrahedron. In the demonstrations of an isotropic dielectric nanosphere, a symmetric scatterer, and an anisotropic nanosphere, we perform multipole decomposition and validate our numerical projection procedure. The obtained results from our procedure are all consistent with those from Mie theory, symmetry constraints, and finite element simulations.
The WITCH Experiment: towards weak interactions studies. Status and prospects
Creators: name: Kozlov, V. Yu.
name: Beck, M.
name: Coeck, S.
name: Herbane, M.
name: Kraev, I. S.
name: Severijns, N.
name: Wauters, F.
name: Delahaye, P.
name: Herlert, A.
name: Wenander, F.
name: Zakoucky, D.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Primary goal of the WITCH experiment is to test the Standard Model for a possible ad-mixture of a scalar or tensor type interaction in beta-decay. This information will be inferred from the shape of the recoil energy spectrum. The experimental set-up was completed and is under intensive commissioning at ISOLDE (CERN). It combines a Penning trap to store the ions and a retardation spectrometer to probe the recoil ion energy. A brief overview of the WITCH set-up and the results of commissioning tests performed until now are presented. Finally, perspectives of the physics program are reviewed.
description: TCP06 Conference Proceedings, accepted for publication in Hyperfine Interactions
Immunolocalization of a proteinase produced by the sap-staining fungus, Ophiostome piceae
Creators: name: Hoffert, Cyrla
Publisher: name: University of British Columbia
Year: 2009

description: Ophiostoma piceae, the most frequently isolated sap-staining fungus in Canada, produces an extracellular subtilisin-like, serine proteinase. This enzyme is presumed to serve an important nutritive function for the fungus as it grows in wood where nitrogen is found primarily in the form of protein. To further characterize this proteinase, an attempt was made to detect and localize it in O. piceae cells. The fungus was grown in a minimal, liquid medium supplemented with either protein or inorganic nitrogen as nitrogen sources. The approaches taken to localize the proteinase in the cells included a) detection of cell-associated proteolytic activity and b) immunological detection of this proteinase in both whole cells and cell fractions. Proteolytic activity was assessed using both the general substrate azocoll and a subtilase specific substrate, succinyl- (Ala)2-Pro-Phe-p-nitroanilide. For immunological detection, polyclonal antibodies were prepared to localize the proteinase in O. piceae by immunoblotting methods and immunogold labelling with transmission electron microscopy. Polyclonal antibodies were first raised against proteinase K, an enzyme that is similar to the O. piceae proteinase, and then against the O. piceae extracellular proteinase purified by hydrophobic interaction chromatography. Characterization of these antibodies indicated that they recognized the O. piceae proteinase. In comparison to extracellular proteolytic activity, little activity was detected in washed cells and homogenized cells of O. piceae grown in soya milk medium. An even lower amount of activity was detected in cultures supplemented with inorganic nitrogen. By immunodetection, the enzyme was found to be associated with the O. piceae cells from both inorganic nitrogen cultures and protein provided cultures. Gold labelling was observed primarily in the cell wall and the extracellular sheath. The results suggested that the proteinase can be detected in the O. piceae cells whether or not they are secreting active proteinase. This was the first time the extracellular proteinase produced by O. piceae was studied with respect to the cells.
Low-energy dipole excitation mode in $^{18}$O with antisymmetrized molecular dynamics
Creators: name: Shikata, Yuki
name: Kanada-En'yo, Yoshiko
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Low-energy dipole (LED) excitations in $^{18}$O were investigated using a combination of the variation after $K$-projection in the framework of antisymmetrized molecular dynamics with $β$-constraint with the generator coordinate method. We obtained two LED states, namely, the $1_1^-$ state with a dominant shell-model structure and the $1_2^-$ state with a large $^{14}\textrm{C}+α$ cluster component. Both these states had significant toroidal dipole (TD) and compressive dipole (CD) strengths, indicating that the TD and CD modes are not separated but mixed in the LED excitations of $^{18}$O. This is unlike the CD and TD modes for well-deformed nuclei such as $^{10}$Be, where the CD and TD modes are generated as $K^π=0^-$ and $K^π=1^-$ excitations, respectively, in a largely deformed state.
description: 19 pages, 7 figures
Lower bound on the radii of light rings in traceless black-hole spacetimes
Creators: name: Hod, Shahar
Publisher: name: arXiv
Year: 2023
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Photonspheres, curved hypersurfaces on which massless particles can perform closed geodesic motions around highly compact objects, are an integral part of generic black-hole spacetimes. In the present compact paper we prove, using analytical techniques, that the innermost light rings of spherically symmetric hairy black-hole spacetimes whose external matter fields are characterized by a traceless energy-momentum tensor cannot be located arbitrarily close to the central black hole. In particular, we reveal the physically interesting fact that the non-linearly coupled Einstein-matter field equations set the lower bound $r_γ\geq {6\over5}r_{\text{H}}$ on the radii of traceless black-hole photonspheres, where $r_{\text{H}}$ is the radius of the outermost black-hole horizon.
description: 10 pages
Customizing Host IDE for Non-programming Users of Pure Embedded DSLs: A Case Study
Creators: name: Nosáľ, Milan
name: Porubän, Jaroslav
name: Sulír, Matúš
Publisher: name: arXiv
Year: 2020
Subjects: subject: Software Engineering (cs.SE)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences

description: Pure embedding as an implementation strategy of domain-specific languages (DSLs) benefits from low implementation costs. On the other hand, it introduces undesired syntactic noise that impedes involvement of non-programming domain experts. Due to this, pure embedded DSLs are generally not intended for, nor used by, non-programmers. In this work, we try to challenge this state by experimenting with inexpensive customizations of the host IDE (Integrated Development Environment) to reduce the negative impact of syntactic noise. We present several techniques and recommendations based on standard IDE features (e.g., file templates, code folding, etc.) that aim to reduce syntactic noise and generally improve the user experience with pure embedded DSLs. The techniques are presented using a NetBeans IDE case study. The goal of the proposed techniques is to improve the user experience with pure embedded DSLs with a focus on the involvement of non-programming domain experts (or non-programmers in general). The proposed techniques were evaluated using a controlled experiment. The experiment compared a group using Ruby and non-modified RubyMine IDE versus a group using Java and NetBeans IDE customized to use the proposed techniques. Experiment results indicate that even inexpensive host IDE customizations can significantly alleviate issues caused by the syntactic noise: Java with its inflexible syntax performed better than Ruby with its concise syntax.
Black Saturn
Creators: name: Elvang, Henriette
name: Figueras, Pau
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Using the inverse scattering method we construct an exact stationary asymptotically flat 4+1-dimensional vacuum solution describing Black Saturn: a spherical black hole surrounded by a black ring. Angular momentum keeps the configuration in equilibrium. Black saturn reveals a number of interesting gravitational phenomena: (1) The balanced solution exhibits 2-fold continuous non-uniqueness for fixed mass and angular momentum; (2) Remarkably, the 4+1d Schwarzschild black hole is not unique, since the black ring and black hole of black saturn can counter-rotate to give zero total angular momentum at infinity, while maintaining balance; (3) The system cleanly demonstrates rotational frame-dragging when a black hole with vanishing Komar angular momentum is rotating as the black ring drags the surrounding spacetime. Possible generalizations include multiple rings of saturn as well as doubly spinning black saturn configurations.
description: 48 pages, 35 figures. v2: clarifications + new discussion of two sectors of balanced solutions + corrections.
Supporting Musical Practice Sessions Through HMD-Based Augmented Reality
Creators: name: Marky, Karola
name: Weiß, Andreas
name: Kosch, Thomas
Publisher: name: arXiv
Year: 2021
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences

description: Learning a musical instrument requires a lot of practice, which ideally, should be done every day. During practice sessions, students are on their own in the overwhelming majority of the time, but access to experts that support students "just-in-time" is limited. Therefore, students commonly do not receive any feedback during their practice sessions. Adequate feedback, especially for beginners, is highly important for three particular reasons: (1) preventing the acquirement of wrong motions, (2) avoiding frustration due to a steep learning curve, and (3) potential health problems that arise from straining muscles or joints harmfully. In this paper, we envision the usage of head-mounted displays as assistance modality to support musical instrument learning. We propose a modular concept for several assistance modes to help students during their practice sessions. Finally, we discuss hardware requirements and implementations to realize the proposed concepts.
The Archaeological and Natural park of Cuma in the Phlegraean Fields: a planning proposal
Creators: name: Incoronato, Lilia
Publisher: name: UPLanD - Journal of Urban Planning, Landscape & environmental Design
Year: 2019

description: The main theme of the research and planning is the Archaeological-Natural Park of Cuma-Licola, located between Pozzuoli and Bacoli. The park includes the archaeological site of Cuma, the first Greek colonial settlement in the West, and the forest of Licola, a natural reserve and Site of Community Importance. Alongside the dense fabric of archaeological evidence, the natural system plays a fundamental role, both for the transmission of the heritage of antiquity preserved there to future generations, and for the improvement of the environment quality. In this context, the Park system could curb the spread of unauthorized building, a phenomenon that is historically rooted in the study area, and it could represent an opportunity for the restoration of the abandoned areas. The lack of a unified and integrated planning for the archaeological sites in the area of Campi Flegrei has made these places, which are already subject by their nature to complex balances, very fragile. In this specific case, the inadequacy of timely interventions to secure the ancient structures has caused them further damage. Moreover, due to the inadequate system of connection with the nearest tourism clusters, the site is now isolated and difficult to reach. Through a rigorous methodology, the project aims at the restoration and enhancement of the Park, considering its historical, environmental and social relevance, its attractive potential and the significant economic impact that these actions could produce
description: UPLanD - Journal of Urban Planning, Landscape & environmental Design, V. 4 N. 2 (2019): Black
Distance Bounds on Quantum Dynamics
Creators: name: Lidar, D. A.
name: Zanardi, P.
name: Khodjasteh, K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive rigorous upper bounds on the distance between quantum states in an open system setting, in terms of the operator norm between the Hamiltonians describing their evolution. We illustrate our results with an example taken from protection against decoherence using dynamical decoupling.
description: 7 pages
Shell model method for Gamow-Teller Transitions in heavy, deformed nuclei
Creators: name: Gao, Zao-Chun
name: Sun, Yang
name: Chen, Y. -S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: Astrophysics (astro-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A method for calculation of Gamow-Teller transition rates is developed by using the concept of the Projected Shell Model (PSM). The shell model basis is constructed by superimposing angular-momentum-projected multi-quasiparticle configurations, and nuclear wave functions are obtained by digonalizing the two-body interactions in these projected states. Calculation of transition matrix elements in the PSM framework is discussed in detail, and the effects caused by the Gamow-Teller residual forces and by configuration-mixing are studied. With this method, it may become possible to perform a state-by-state calculation for beta-decay and electron-capture rates in heavy, deformed nuclei at finite temperatures. Our first example indicates that, while experimentally known Gamow-Teller transition rates from the ground state of the parent nucleus are reproduced, stronger transitions from some low-lying excited states are predicted to occur, which may considerably enhance the total decay rates once these nuclei are exposed to hot stellar environments.
description: 11 pages, 8 figures
Το βάπτισμα στις κατηχήσεις του αγίου Ιωάννου του Χρυσοστόμου
Creators: name: Τόμας, Ιωάννης Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Κατηχήσεις
Βάπτισμα
Χρυσόστομος
Catechism
Baptism
Chrysostom

description: Το δεύτερο μισό του τετάρτου αιώνα, λόγω της προσέλευσης μεγάλου πληθυσμού στο Χριστιανισμό, η Εκκλησία της Αντιοχείας αναγκάζεται να καθιερώσει την ομαδική κατήχηση και το ομαδικό βάπτισμα κατά τη νύχτα του Πάσχα. Πρεσβύτερος στην Αντιόχεια τότε ο Ιωάννης ο Χρυσόστομος εκφώνησε πολλούς λόγους από τους οποίους σώθηκαν μόνο δώδεκα, που περιέχουν πληροφορίες για τον τρόπο και το περιεχόμενο της κατήχησης, τη διαδικασία τέλεσης του βαπτίσματος και τη ζωή των κατηχουμένων πριν και μετά το βάπτισμα. Το βάπτισμα αποτελούσε μεγάλη γιορτή για όλη τη Χριστιανική κοινότητα, ενώ πέρα από τις ηθικές παραινέσεις για τον ορθό τρόπο ζωής των υποψηφίων, μεγάλη σημασία είχε η πίστη των κατηχουμένων στο πρόσφατο Σύμβολο Πίστεως της Νικαίας–Κωνσταντινουπόλεως. Ως τελετουργική καινοτομία μαρτυρείται η αποκοπή από το σύνολο της τελετής του σκέλους που αφορά την απόταξη του σατανά, τη σύνταξης με το Χριστό και την ομολογία πίστεως και η μεταφορά της τέλεσής τους κατά την ενάτη ώρα της Μ. Παρασκευής. Τέλος αξιοσημείωτη είναι και η μη αναφορά του Χρυσοστόμου στο μεταβαπτισματικό χρίσμα.
description: Due to the great increase in the Christian population during the second half of the 4th century AC, the Church of Antakya had to establish mass inculcation and mass baptism during the Great Vigil of Easter. John Chrysostom, being the Presbyter in Antakya at the time, declaimed lots of speeches, by which only twelve have been saved, including information regarding the content and the way of the inculcation was performed, the process of baptism and the life of the catechized before and after the baptism. The baptism in catecheses of Saint John Chrysostom Baptism used to be a great celebration for the whole Christian community, and apart from the righteous recommendations about the appropriate way of life the candidates should follow, there was placed too much emphasis on the faith the catechized should have on the recent Creed of Nikaia – Constantinople. The fact that the parts of the ceremony related to the disavowal of the Satan, the alignment with Christ and the declaration of faith were completely omitted and transferred to be celebrated during the «9th hour» on Good Friday is considered to be a ceremonial innovation. Last but not least, it is worth mentioning that Chrysostom has made no reference to the postbaptismal unction.
MRI Images Analysis Method for Early Stage Alzheimer's Disease Detection
Creators: name: Miled, Achraf Ben
name: Yeferny, Taoufik
name: Rabeh, Amira ben
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Machine Learning (cs.LG)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Computer and information sciences

description: Alzheimer's disease is a neurogenerative disease that alters memories, cognitive functions leading to death. Early diagnosis of the disease, by detection of the preliminary stage, called Mild Cognitive Impairment (MCI), remains a challenging issue. In this respect, we introduce, in this paper, a powerful classification architecture that implements the pre-trained network AlexNet to automatically extract the most prominent features from Magnetic Resonance Imaging (MRI) images in order to detect the Alzheimer's disease at the MCI stage. The proposed method is evaluated using a big database from OASIS Database Brain. Various sections of the brain: frontal, sagittal and axial were used. The proposed method achieved 96.83% accuracy by using 420 subjects: 210 Normal and 210 MRI
The X-ray nuclei of intermediate-redshift radio sources
Creators: name: Hardcastle, M. J.
name: Evans, D. A.
name: Croston, J. H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a Chandra and XMM-Newton spectral analysis of the nuclei of the radio galaxies and radio-loud quasars from the 3CRR sample in the redshift range 0.1 < z < 0.5. In the range of radio luminosity sampled by these objects, mostly FRIIs, it has been clear for some time that a population of radio galaxies (`low-excitation radio galaxies') cannot easily participate in models that unify narrow-line radio galaxies and broad-line objects. We show that low-excitation and narrow-line radio galaxies have systematically different nuclear X-ray properties: while narrow-line radio galaxies universally show a heavily absorbed nuclear X-ray component, such a heavily absorbed component is rarely found in sources classed as low-excitation objects. Combining our data with the results of our earlier work on the z<0.1 3CRR sources, we discuss the implications of this result for unified models, for the origins of mid-infrared emission from radio sources, and for the nature of the apparent FRI/FRII dichotomy in the X-ray. The lack of direct evidence for accretion-related X-ray emission in FRII LERGs leads us to argue that there is a strong possibility that some, or most, FRII LERGs accrete in a radiatively inefficient mode. However, our results are also consistent with a model in which the accretion mode is the same for low- and high-excitation FRIIs, with the lower accretion luminosities in FRII LERGs attributed instead to more efficient radio luminosity production in those objects.
description: Accepted by MNRAS. 12 pages, 5 figures. Latest version incorporates referee's comments, plus some new data. Conclusions unchanged
Quantum phase transitions in two-dimensional superconductors: a review on recent experimental progress
Creators: name: Wang, Ziqiao
name: Liu, Yi
name: Ji, Chengcheng
name: Wang, Jian
Publisher: name: arXiv
Year: 2023
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Superconductor-insulator/metal transition (SIT/SMT) as a paradigm of quantum phase transition has been a research highlight over the last three decades. Benefit from recent developments in the fabrication and measurements of 2D superconducting films and nanodevices, unprecedented quantum phenomena have been revealed in the quantum phase transitions of 2D superconductors. In this review, we introduce the recent progress on quantum phase transitions in 2D superconductors, focusing on the quantum Griffiths singularity (QGS) and anomalous metal state. Characterized by a divergent critical exponent when approaching zero temperature, QGS of SMT is discovered in ultrathin crystalline Ga films and subsequently detected in various 2D superconductors. The universality of QGS indicates the profound influence of quenched disorder on quantum phase transitions. Besides, in a 2D superconducting system, whether a metallic ground state can exist is a long-sought mystery. Recently, the charge-2e quantum oscillations are observed in nanopatterned superconducting films, indicating the bosonic nature of the anomalous metal state and ending the debate on whether bosons can exist as a metal. The evidences of the anomalous metal states have also been reported in crystalline epitaxial thin films and exfoliated nanoflakes, as well as granular composite films. High quality filters are used in these works to exclude the influence of external high frequency noises in ultralow temperature measurements. The observations of QGS and metallic ground states in 2D superconductors not only reveal the prominent role of quantum fluctuations and dissipations but also provide new perspective to explore quantum phase transitions in superconducting systems.
BioQUEST / QUBES Summer Workshop - Code of Conduct
Creators: name: Jenkins, Kristin
name: Donovan, Sam
name: Fagen, Adam
name: LaMar, Drew
name: Orndorf, Hayley
name: Smith, Jim
name: Waterman, Margaret
Publisher: name: QUBES Educational Resources
Year: 2019

description: We are using this project to publish and version our meeting code of conduct. Our goal is to engage the conference community in the discussion of the code of conduct to raise awareness about it.
Chiral Lattice Gauge Theories and The Strong Coupling Dynamics of a Yukawa-Higgs Model with Ginsparg-Wilson Fermions
Creators: name: Giedt, Joel
name: Poppitz, Erich
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The Yukawa-Higgs/Ginsparg-Wilson-fermion construction of chiral lattice gauge theories described in hep-lat/0605003 uses exact lattice chirality to decouple the massless chiral fermions from a mirror sector, whose strong dynamics is conjectured to give cutoff-scale mass to the mirror fermions without breaking the chiral gauge symmetry. In this paper, we study the mirror sector dynamics of a two-dimensional chiral gauge theory in the limitof strong Yukawa and vanishing gauge couplings, in which case it reduces to an XY model coupled to Ginsparg-Wilson fermions. For the mirror fermions to acquire cutoff-scale mass it is believed to be important that the XY model remain in its "high temperature" phase, where there is no algebraic ordering--a conjecture supported by the results of our work. We use analytic and Monte-Carlo methods with dynamical fermions to study the scalar and fermion susceptibilities, and the mirror fermion spectrum. Our results provide convincing evidence that the strong dynamics does not "break" the chiral symmetry (more precisely, that the mirror fermions do not induce algebraic ordering in two-dimensions), and that the mirror fermions decouple from the infrared physics.
description: 44 pages, 18 figures; v2: clarification of fermion operators, discussion of recent related works
Light forces in ultracold photoassociation
Creators: name: Gomez, E.
name: Black, A. T.
name: Turner, L. D.
name: Tiesinga, E.
name: Lett, P. D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We study the time-resolved photoassociation of ultracold sodium in an optical dipole trap. The photoassociation laser excites pairs of atoms to molecular states of large total angular momentum at high intensities (above 20 kW/cm$^{2}$). Such transitions are generally suppressed at ultracold temperatures by the centrifugal barriers for high partial waves. Time-resolved ionization measurements reveal that the atoms are accelerated by the dipole potential of the photoassociation beam. We change the collision energy by varying the potential depth, and observe a strong variation of the photoassociation rate. These results demonstrate the important role of light forces in cw photoassociation at high intensities.
description: 7 pages, 3 figures
Μεταφορά κωδίκων της MATLAB σε προγράμματα C++ για την επίλυση Κανονικών Διαφορικών Εξισώσεων
Creators: name: Θεοδωρακόπουλος, Αχιλλέας-Κωνσταντίνος Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Προβλήματα αρχικών συνθηκών
Αριθμητική ολοκλήρωση
Διαφορικές Εξισώσεις
Initial Value Problems
Numerical integration
Differential equations

description: Στο πλαίσιο της διπλωματικής αυτής εργασίας επιχειρείται ο συγκερασμός της αξιοπιστίας και των δυνατοτήτων που παρέχει η ώριμη ρουτίνα ολοκλήρωσης προβλημάτων αρχικών συνθηκών ode15s του MATLAB με την ταχύτητα που προσφέρει η C++. Για το σκοπό αυτό δημιουργήθηκε σε γλώσσα C++ ένα αλγοριθμικά πιστό αντίγραφο της ode15s και των λοιπών αναγκαίων ρουτίνων, συμπεριλαμβάνοντας όλες τις παρεχόμενες δυνατότητες. Η επιλογή του ολοκληρωτή ode15s έναντι του δημοφιλέστερου ode45 εδράζει στη δυνατότητα του πρώτου να αντιμετωπίζει άκαμπτα προβλήματα και παράλληλα να επιδεικνύει υψηλή επίδοση ακόμη κι όταν χρησιμοποιείται σε μη άκαμπτα προβλήματα. Ο κώδικας έχει δομηθεί με τρόπο που διευκολύνει την προσθήκη νέων ολοκληρωτών του MATLAB όπως η ode45, ode113 κοκ.
description: Τhis M.Sc. thesis attempts to unify the reliability and capabilities of ode15s, a mature initial value problem integration routine offered by MATLAB, with the high-speed properties of the C++ programming language. In this direction, ode15s and all relevant routines required were ported in C++ yielding an algorithmically identical C++ version of ode15s, which includes all functionality available in MATLAB. The choice of ode15s over the more popular ode45 is justified by the ability of the former to integrate stiff problems while exhibiting only a slight performance impact when applied to non-stiff problems. The source code has been structured to facilitate the addition of other MATLAB integrators such as ode45, ode113 etc.
Building Large Lexicalized Ontologies from Text: a Use Case in Automatic Indexing of Biotechnology Patents
Creators: name: Nédellec, Claire
name: Golik, Wiktoria
name: Aubin, Sophie
name: Bossy, Robert
Publisher: name: arXiv
Year: 2020
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: This paper presents a tool, TyDI, and methods experimented in the building of a termino-ontology, i.e. a lexicalized ontology aimed at fine-grained indexation for semantic search applications. TyDI provides facilities for knowledge engineers and domain experts to efficiently collaborate to validate, organize and conceptualize corpus extracted terms. A use case on biotechnology patent search demonstrates TyDI's potential.
Hyperviscosity, Galerkin truncation and bottlenecks in turbulence
Creators: name: Frisch, Uriel
name: Kurien, Susan
name: Pandit, Rahul
name: Pauls, Walter
name: Ray, Samriddhi Sankar
name: Wirth, Achim
name: Zhu, Jian-Zhou
Publisher: name: arXiv
Year: 2008
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Analysis of PDEs (math.AP)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: It is shown that the use of a high power $α$ of the Laplacian in the dissipative term of hydrodynamical equations leads asymptotically to truncated inviscid \textit{conservative} dynamics with a finite range of spatial Fourier modes. Those at large wavenumbers thermalize, whereas modes at small wavenumbers obey ordinary viscous dynamics [C. Cichowlas et al. Phys. Rev. Lett. 95, 264502 (2005)]. The energy bottleneck observed for finite $α$ may be interpreted as incomplete thermalization. Artifacts arising from models with $α> 1$ are discussed.
description: 4 pages, 2 figures, Phys. Rev. Lett. in press
Data for: Inputs-Oriented VRS DEA in dairy farms
Creators: name: Zuniga-Gonzalez, C.A.
name: Jaramillo-Villanueva, J. L.
Publisher: name: figshare
Year: 2024
Subjects: classificationCode: 300302
subject: Animal management
classificationCode: 380203
subject: Economic models and forecasting

description: The data describe the variable used on the DEA analysis when the DEA instrument was used for Inputs-Oriented VRS DEA in dairy farms. In these supplementary files, we add S1, S2, S3 and files Table 10 and Table 11 that resumen the results of Bootstrap DEA.
Πεπερασμένης διάστασης άλγεβρες και το θεώρημα του Gabriel
Creators: name: Στράτογλου, Ευστράτιος Ζαχαρία
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: subject: Μαθηματικά
subject: Άλγεβρα
subject: Αναπαραστάσεις
subject: Mathematics
subject: FOS: Mathematics
subject: Algebra
subject: Representations

description: Σκοπός της διατριβής ήταν η μελέτη των αλγεβρών πεπερασμένης διάστασης πάνω από ένα αλγεβρικά κλειστό σώμα. Δώσαμε τον ορισμό της φαρέτρας και βασικών ιδιοτήτων της. Ασχοληθήκαμε με τις αναπαραστάσεις αλγεβρών και φαρετρών και αναλύσαμε την σχέση που τις συνδέει. Παρουσιάσαμε στους πεπερασμένο, ήρεμο και άγριο τύπο αναπαράστασης αλγεβρών. Ακόμη αναφερθήκαμε στα προβολικά και εμβολικά modules. Τέλος, παρουσιάσαμε και αποδείξαμε το Θεώρημα του Gabriel που αναφέρεται σε άλγεβρες πεπερασμένου τύπου αναπαράστασης δηλαδή άλγεβρες με πεπερασμένου πλήθους μη ισόμορφες μη αναλύσιμες αναπαραστάσεις.
description: The aim of the present thesis was the study of finite dimensional algebras over algebraically closed field. We gave the definition of a quiver and some of its basic properties. Then we presented the representations of algebras and quivers and we analyzed the connection between them. Furthermore, we presented the finite, tame and wild representation types of algebras. Later, we examined the properties of projective and injective modules. Lastly, we gave and proved Gabriel’s Theorem for algebras of finite representation type videlicet algebras with only finitely many non-isomorphic indecomposable representations.
Driven Dipolariton Transistors in Y-shaped Channels
Creators: name: Serafin, Patrick
name: Byrnes, Tim
name: Kolmakov, German
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Exciton-dipolaritons are investigated as a platform for realizing working elements of a polaritronic transistor. Exciton-dipolaritons are three-way superposition of cavity photons, direct and indirect excitons in a bilayer semiconducting system embedded in an optical microcavity. Using the forced diffusion equation for dipolaritons, we study the room-temperature dynamics of dipolaritons in a transition metal dichalcogenide (TMD) heterogeneous bilayer. Specifically, we considered a MoSe$_2$-WS$_2$ heterostructure, where a Y-shaped channel guiding the dipolariton propagation is produced. We demonstrate that polaritronic signals can be redistributed in the channels by applying a driving voltage in an optimal direction. Our findings open a route towards the design of an efficient room-temperature dipolariton-based optical transistor.
description: 23 pages, 9 figures
The Standard Model: Alchemy and Astrology
Creators: name: Lykken, Joseph D.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: An brief unconventional review of Standard Model physics, containing no plots.
description: 12 pages, 0 figures, review talk from "Physics at LHC", Krakow, 3-8 July 2006
Spin Hall Effect in Atoms
Creators: name: Liu, Xiong-Jun
name: Liu, Xin
name: Kwek, L. C.
name: Oh, C. H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We propose an optical means to realize a spin hall effect (SHE) in neutral atomic system by coupling the internal spin states of atoms to radiation. The interaction between the external optical fields and the atoms creates effective magnetic fields that act in opposite directions on "electrically" neutral atoms with opposite spin polarizations. This effect leads to a Landau level structure for each spin orientation in direct analogy with the familiar SHE in semiconductors. The conservation and topological properties of the spin current, and the creation of a pure spin current are discussed.
description: 4 pages, 2 figure; Final version
Η επόμενη μέρα: καταστροφή και επιβίωση στις Τρωάδες και την Εκάβη του Ευριπίδη
Creators: name: Βασιλάκη, Μαριλένα Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Ευριπίδης
Καταστροφή στην τραγωδία
Επιβίωση στην τραγωδία
Euripides
Disaster in tragedy
Survival in tragedy

description: Η παρούσα εργασία πραγματεύεται το πώς επιβίωσαν μέσα από την απώλεια και την καταστροφή οι Τρωαδίτισσες, τόσο οι ανώνυμες, που συναπαρτίζουν τον Χορό, όσο και οι επώνυμες, Κασσάνδρα, Ανδρομάχη, Πολυξένη και Εκάβη στις τραγωδίες Τρωάδες και Εκάβη του Ευριπίδη διατηρώντας ακέραιο το ήθος και την αξιοπρέπειά τους. Ως αιχμάλωτες βιώνουν την απόλυτη εξαθλίωση και τη σεξουαλική βία που τους ασκείται από τους Έλληνες αρχηγούς, τουλάχιστον οι νεώτερες, πλην της Πολυξένης, που θυσιάζεται στον τάφο του Αχιλλέα. Αντιθέτως, η Εκάβη καθότι ηλικιωμένη βιώνει την αιχμαλωσία με διαφορετικό τρόπο. Υπομένει την απώλεια και τον θάνατο όλων της των αγαπημένων προσώπων: του Αστυάνακτα, της Πολυξένης και του Πολύδωρου. Ο χαρακτήρας της εξελίσσεται σταδιακά μέσα από τις δύο τραγωδίες και φτάνει στη δραματική του κορύφωση στο τέλος της Εκάβης, που εκδικείται για τα παιδιά της και ακολουθώντας το πεπρωμένο της μεταμορφώνεται σε σκύλα. Έπειτα από βαρβαρότητες, βία και θανάτους χάνεται εξολοκλήρου το βασιλικό γένος της Τροίας: ο Αστυάνακτας, ο τελευταίος αρσενικός γόνος της βασιλικής οικογένειας, δολοφονήθηκε, όπως και ο Πολύδωρος. Η Πολυξένη θυσιάστηκε στον τάφο του Αχιλλέα, η Εκάβη μεταμορφώθηκε σε σκύλα και τάφος της είναι το Κυνός σῆμα, σημείο για τους ναυτικούς, η Ανδρομάχη οδηγήθηκε στην Ελλάδα μαζί με τον Νεοπτόλεμο και τέλος η Κασσάνδρα στις Μυκήνες, όπου θα θανατωθεί από την Κλυταιμήστρα, θύμα νέου κύκλου αίματος στην Ελλάδα.
description: The present thesis deals with how Trojan women survive through disaster and loss, and manage to retain their dignity and nobility. The female Trojan characters in Euripides’ Troades and Hecuba are anonymous, the members of the choruses, and eponymous, Kassandra, Andromache, Polyxena and Hecuba. As captives, they experience wretchedness and sexual abuse by the Greek captains. The only one who escapes this predicament is Polyxena, who is sacrificed at the tomb of Achilles. By contrast, Hecuba, being an elderly woman herself, experiences captivity in a different way. She endures the loss and death of all her loved ones: Astyanax, Polyxena as well as Polydorus. Her character evolves gradually through the two tragedies and she becomes most passionately active at the end of Hecuba, when she takes revenge for her children’s death and turns into a bitch. Facing brutality, violence and death, the Trojan royal house is wiped out: Astyanax, the last male scion of the royal family is killed, as is Polydorus. Polyxena is sacrificed at the tomb of Achilles, Hecuba is transformed into a bitch, with her tomb, Cynossema, serving later as signpost for sailors, Andromache is taken to Greece by Neoptolemus and Kassandra follows Agamemnon to Mycenae, where she will be killed by Clytaemestra, a victim of a new cycle of bloodshed in Greece.
Large Language Model (LLM) Bias Index -- LLMBI
Creators: name: Oketunji, Abiodun Finbarrs
name: Anas, Muhammad
name: Saina, Deepthi
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Computers and Society (cs.CY)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: I.2.7

description: The Large Language Model Bias Index (LLMBI) is a pioneering approach designed to quantify and address biases inherent in large language models (LLMs), such as GPT-4. We recognise the increasing prevalence and impact of LLMs across diverse sectors. This research introduces a novel metric, LLMBI, to systematically measure and mitigate biases potentially skewing model responses. We formulated LLMBI using a composite scoring system incorporating multiple dimensions of bias, including but not limited to age, gender, and racial biases. To operationalise this metric, we engaged in a multi-step process involving collecting and annotating LLM responses, applying sophisticated Natural Language Processing (NLP) techniques for bias detection, and computing the LLMBI score through a specially crafted mathematical formula. The formula integrates weighted averages of various bias dimensions, a penalty for dataset diversity deficiencies, and a correction for sentiment biases. Our empirical analysis, conducted using responses from OpenAI's API, employs advanced sentiment analysis as a representative method for bias detection. The research reveals LLMs, whilst demonstrating impressive capabilities in text generation, exhibit varying degrees of bias across different dimensions. LLMBI provides a quantifiable measure to compare biases across models and over time, offering a vital tool for systems engineers, researchers and regulators in enhancing the fairness and reliability of LLMs. It highlights the potential of LLMs in mimicking unbiased human-like responses. Additionally, it underscores the necessity of continuously monitoring and recalibrating such models to align with evolving societal norms and ethical standards.
Ανάπτυξη μαθησιακού περιβάλλοντος ελέγχου μουσικών γνώσεων για το έργο «Πρελούδιο στο απομεσήμερο ενός φαύνου» του Κλωντ Ντεμπυσσύ
Creators: name: Χριστοδούλου, Φωτεινή Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Μουσική Εκπαίδευση
Πολυμέσα
Ντεμπυσσύ
Music education
Multimedia
Debussy
Education

description: Στην παρούσα εργασία δημιουργήθηκε ένα εκπαιδευτικό διαδραστικό υλικό για τη διδασκαλία του μουσικού έργου «Πρελούδιο στο απομεσήμερο ενός φαύνου» του Κλωντ Ντεμπυσσύ σε μια διδακτική ενότητα. Στο πλαίσιο του εκπαιδευτικού υλικού παρέχονται ιστορικές πληροφορίες για το έργο και τη σχέση του με το ομώνυμο ποιητικό έργο του Σ. Μαλλαρμέ, καθώς και για το κίνημα του Συμβολισμού στο οποίο ανήκει γενικότερα. Το εκπαιδευτικό διαδραστικό υλικό περιλαμβάνει ένα τεστ γνώσεων του οποίου οι απαντήσεις βρίσκονται στις ενσωματωμένες σε αυτό πληροφορίες. Το ίδιο το έργο είναι δυνατόν να παρακολουθήσουν οι μαθητές παιγμένο από ορχήστρα αν υπάρχει δυνατότητα σύνδεσης στο διαδίκτυο ή να το ακούσουν αν δεν υπάρχει σύνδεση στο διαδίκτυο. Το τελικό έργο έχει μέγεθος μικρότερο των 5 Mb ώστε να καθίσταται εύκολος ο διαμοιρασμός του. Για την αναπαραγωγή του υλικού που είναι σε μορφή swf απαιτείται η εγκατάσταση του Adobe Flash Player 9 ή μεταγενέστερου.
description: In this study created an interactive educational material for the teaching of the musical piece "Prelude to the Afternoon of a Faun" by Claude Debussy in a teaching unit. As part of the educational material provided historical information on the piece and its relationship with the homonymous poetry of S. Mallarmé, as well as the movement of Symbolism which owns generally. The educational material includes an interactive quiz whose answers lie in embedded in this material information. The work itself is possible for the students to watch played by an orchestra if there is access to the internet or to hear if there is no internet connection. The final work are less than 5 Mb to make it easy for share. For playback of the swf material format required the installation of Adobe Flash Player 9 or later.
description: Στη βιβλιοθήκη διατίθεται συμπληρωματικό αρχείο φλας βίντεο σε μορφή swf
description: Σε συνεργασία με το τμήμα Λογιστικής και Χρηματοοικονομικής (Πανεπιστήμιο Μακεδονίας)
Data for: Inputs-Oriented VRS DEA in dairy farms
Creators: name: Zuniga-Gonzalez, C.A.
name: Jaramillo-Villanueva, J. L.
Publisher: name: figshare
Year: 2023
Subjects: classificationCode: 300302
subject: Animal management
classificationCode: 380203
subject: Economic models and forecasting

description: The data describe the variable used on the DEA analysis when the DEA instrument was used for   
Inputs-Oriented VRS DEA in dairy farms.
Nucleation phenomena in protein folding: The modulating role of protein sequence
Creators: name: Travasso, R. D. M.
name: Faisca, P. F. N.
name: da Gama, M. M. Telo
Publisher: name: arXiv
Year: 2006
Subjects: subject: Biomolecules (q-bio.BM)
subject: FOS: Biological sciences

description: For the vast majority of naturally occurring, small, single domain proteins folding is often described as a two-state process that lacks detectable intermediates. This observation has often been rationalized on the basis of a nucleation mechanism for protein folding whose basic premise is the idea that after completion of a specific set of contacts forming the so-called folding nucleus the native state is achieved promptly. Here we propose a methodology to identify folding nuclei in small lattice polymers and apply it to the study of protein molecules with chain length N=48. To investigate the extent to which protein topology is a robust determinant of the nucleation mechanism we compare the nucleation scenario of a native-centric model with that of a sequence specific model sharing the same native fold. To evaluate the impact of the sequence's finner details in the nucleation mechanism we consider the folding of two non- homologous sequences. We conclude that in a sequence-specific model the folding nucleus is, to some extent, formed by the most stable contacts in the protein and that the less stable linkages in the folding nucleus are solely determined by the fold's topology. We have also found that independently of protein sequence the folding nucleus performs the same `topological' function. This unifying feature of the nucleation mechanism results from the residues forming the folding nucleus being distributed along the protein chain in a similar and well-defined manner that is determined by the fold's topological features.
description: 10 Figures. J. Physics: Condensed Matter (to appear)
Probing quasi-long-range ordering by magnetostriction in monolayer CoPS3
Creators: name: Liu, Qiye
name: Wang, Le
name: Fu, Ying
name: Zhang, Xi
name: Huang, Lianglong
name: Su, Huimin
name: Lin, Junhao
name: Chen, Xiaobin
name: Yu, Dapeng
name: Cui, Xiaodong
name: Mei, Jia-Wei
name: Dai, Jun-Feng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Mermin-Wagner-Coleman theorem predicts no long-range magnetic order at finite temperature in the two-dimensional (2D) isotropic systems, but a quasi-long-range order with a divergent correlation length at the Kosterlitz-Thouless (KT) transition for planar magnets. As a representative of two-dimensional planar antiferromagnets, single-layer CoPS3 carries the promise of monolayer antiferromagnetic platforms for the ultimately thin spintronics. Here, with the aid of magnetostriction which is sensitive to the local magnetic order, we observe the signatured phonon mode splitting of below TKT in monolayer CoPS3, revealing the presence of quasi-long-range ordering in XY-type antiferromagnet. Moreover, the ratio (J'/J) between the interlayer and intralayer interactions, which characterizes the 2D behaviors, is evaluated to be around 0.03 for the first time. Our results provide an efficient method to detect the quasi-long-range antiferromagnetic ordering in the two-dimensional magnets down to monolayer limit.
Προσδιοριστικοί Παράγοντες της Χρηματοπιστωτικής Σταθερότητας
Creators: name: Σκαραγκός, Δημήτριος Λυμπέρη
Publisher: name: Aristotle University of Thessaloniki
Year: 2015
Subjects: Δείκτης Χρηματοπιστωτικής Σταθερότητας
Συστημικός Κίνδυνος
Πάνελ δεδομένα
Financial Stability Index
Systemic Risk
Panel Data

description: Ο όρος χρηματοπιστωτική σταθερότητα χρησιμοποιείται ολοένα και συχνότερα στα έτη μετά την παγκόσμια χρηματοπιστωτική κρίση του 2008, κυρίως ως μέλημα και καθήκον κυβερνήσεων, κεντρικών τραπεζών και λοιπών ρυθμιστικών και εποπτικών αρχών. Αν και δεν υπάρχει, προς το παρόν τουλάχιστον, ένας κοινά αποδεκτός ορισμός της, ως έννοια είναι περισσότερο κατανοητή: η επιθυμητή κατάσταση του χρηματοπιστωτικού συστήματος (τράπεζες και λοιποί πιστωτικοί οργανισμοί, αγορές χρήματος, πιστώσεων και κεφαλαίων και οι υποδομές των αγορών, δηλαδή τα συστήματα πληρωμών, εκκαθάρισης και διακανονισμού συναλλαγών), το οποίο είναι σε θέση να απορροφήσει/αντιμετωπίσει πιθανά προβλήματα και πιέσεις χωρίς σημαντικές επιπτώσεις στην εύρυθμη λειτουργία του. Στην παρούσα εργασία προσεγγίζεται το θέμα της χρηματοπιστωτικής σταθερότητας σφαιρικά, αναλύοντας τις ποικίλες εκφάνσεις της, με ιδιαίτερη μνεία στη σχέση αυτής με την έννοια του συστημικού κινδύνου. Στο εμπειρικό μέρος της παρούσας εργασίας, κατασκευάστηκε ένας δείκτης για τη ποσοτική μέτρηση του βαθμού της χρηματοπιστωτικής σταθερότητας και χρησιμοποιώντας τη μεθοδολογία των πάνελ δεδομένων, προσδιορίστηκαν οι παράγοντες που την επηρεάζουν σημαντικά.
description: The term financial stability is increasingly used in the years following the 2008 global financial crisis (GFC), as a primal concern and duty of governments, central banks and other regulating and supervising authorities. Although there is, for now at least, no widely accepted definition of financial stability, as a meaning is far more understandable: the coveted state of the financial system (banks and other credit institutions, money markets, credit and capital markets and market infrastructures, i.e. payment, clearing and settlement systems), being able to absorb / face potential problems and strains without significant impact on its proper functioning. In this study we approached the issue of financial stability, analyzing its various factors, with particular reference to the connection with the concept of systemic risk. At the empirical part of this paper, an index for the quantitative measurement of the degree of financial stability is constructed and using the methodology of panel data, we identified the factors that affect financial stability significantly.