cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Low Intermediate Scales for Leptogenesis in Supersymmetric SO(10) Grand Unified Theories
Creators: name: Majee, Swarup Kumar
name: Parida, Mina K.
name: Raychaudhuri, Amitava
name: Sarkar, Utpal
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A low intermediate scale within minimal supersymmetric SO(10) GUTs is a desirable feature to accommodate leptogenesis. We explore this possibility in models where the intermediate gauge symmetry breaks spontaneously by (a) doublet Higgs scalars and also (b) by triplets. In both scenarios gauge coupling unification requires the scale of left-right symmetry breaking ($M_R$) to be close to the unification scale. This will entail unnaturally small neutrino Yukawa couplings to avoid the gravitino problem and allow successful leptogenesis. We point out that any one of three options -- threshold corrections due to the mass spectrum near the unification scale, gravity induced non-renormalizable operators near the Planck scale, or presence of additional light Higgs multiplets -- can permit unification along with much lower values of $M_R$ as required for leptogenesis. In the triplet model, independent of these corrections, we find a lower bound on the intermediate scale, $M_R > 10^9$ GeV, arising from the requirement that the theory must remain perturbative at least upto the GUT scale. We show that in the doublet model $M_R$ can even be in the TeV region which, apart from permitting resonant leptogenesis, can be tested at LHC and ILC.
description: 17 pages, 1 figure, to appear in Phys. Rev D
Unsaturated analogues of valproic acid : structure activity relationships and interaction with gaba metabolism
Creators: name: Palaty, Jan
Publisher: name: University of British Columbia
Year: 2009

description: Vaiproic acid (VPA) is a versatile clinical antiepileptic drug which is also characterized by rare but potentially fatal side effects such as hepatotoxicity and teratogenicity. Its principal metabolite, the α,β-unsaturated acid 2-ene VPA, appears to share most of VPA’s therapeutic properties while lacking its toxicity and is thus a useful lead compound for the development of safer antiepileptic drugs. The objectives of this thesis were to shed some light on the anticonvulsant properties of 2-ene VPA analogues by an investigation of their influences on GABA metabolism and membrane fluidity. A group of α,β-unsaturated acids were synthesized by established methods or minor modifications thereof. The compounds were then evaluated for anticonvulsant activity in mice using the subcutaneous pentylenetetrazole test. Cyclooctylideneacetic acid (compound 17) exhibited a potency markedly exceeding that of VPA itself with no more than modest levels of sedation. Potency, as log(ED5O), was highly correlated with both volume and lipophilicity rather than with one of the shape parameters calculated by molecular modelling techniques, arguing against the existence of a specific receptor site. These relationships remained essentially intact when ED5O was replaced with the brain concentration of the drug 15 min following an ED5O dose. Subsequent studies focused on the properties of nerve terminals from whole brain homogenates prepared from mice administered an ED5O dose of each drug. GABA levels were generally found to be elevated, supporting the central role of this neurotransmitter in the anticonvulsant properties of VPA and its analogues. Selectivity for regional or functional pools of GABA was suggested as a cause for the variability. The activity of GABA’s synthesizing enzyme glutamate decarboxylase was mostly unchanged but some drugs, notably compound 17, showed a significant decrease in activity compared to the control. These influences on GAD activity were unrelated to the extent of binding of the enzyme’s co-factor, pyridoxal 5¹-phosphate, following in vivo administration of VPA, 2-ene VPA and compound 17. Finally, the activity of the GAD was found to be inhibited in a non-competitive manner by compound 17 with Ki =9 mM.
Aeschna rufescens Van der Linden 1825
Creators: name: Hagen, H.
Publisher: name: Zenodo
Year: 1863
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Aeshnidae
Aeschna
Aeschna rufescens

description: 31. A. rufescens Van der Lind.
Caucasus; in ganz Europa.
description: Published as part of Hagen, H., 1863, Die Odonaten- und Nenropteren-Fauna Syriens und Klein-Asiens, pp. 193-199 in Wiener Entomologische Monatschrift 7 on page 197, DOI: 10.5281/zenodo.3528093
The Turing Way: community practices for reproducible research
Creators: name: Welsh, Ceilidh
name: Roman Garcia, Susana
Publisher: name: Zenodo
Year: 2024
Subjects: TuringWay
OpenScience

description: This was a 5 minute presentation given by Susana Roman Garcia and Ceilidh Welsh at the OpenFest 2024, which was co-delivered by the University of Sheffield and Sheffield Hallam University.
Goldstone bosons in presence of charge density
Creators: name: Brauner, Tomas
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We investigate spontaneous symmetry breaking in Lorentz-noninvariant theories. Our general discussion includes relativistic systems at finite density as well as intrinsically nonrelativistic systems. The main result of the paper is a direct proof that nonzero density of a non-Abelian charge in the ground state implies the existence of a Goldstone boson with nonlinear (typically, quadratic) dispersion law. We show that the Goldstone boson dispersion relation may in general be extracted from the current transition amplitude and demonstrate on examples from recent literature, how the calculation of the dispersion relation is utilized by this method. After then, we use the general results to analyze the nonrelativistic degenerate Fermi gas of four fermion species. Due to its internal SU(4) symmetry, this system provides an analog to relativistic two-color quantum chromodynamics with two quark flavors. In the end, we extend our results to pseudo-Goldstone bosons of an explicitly broken symmetry.
description: v1: 16 pages, REVTeX4, 7 eps figures; v2: shortened (omitting details of calculations) on request from referee; version to appear in Phys. Rev. D
Aeschna microstigma Schneider 1845
Creators: name: Hagen, H.
Publisher: name: Zenodo
Year: 1863
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Aeshnidae
Aeschna
Aeschna microstigma

description: 32. A. microstigma Schneid.
Kellemischin Klein-Asien, Morea (?) Krü per.
description: Published as part of Hagen, H., 1863, Die Odonaten- und Nenropteren-Fauna Syriens und Klein-Asiens, pp. 193-199 in Wiener Entomologische Monatschrift 7 on page 197, DOI: 10.5281/zenodo.3528093
Entanglement of random vectors
Creators: name: Znidaric, Marko
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: We analytically calculate the average value of i-th largest Schmidt coefficient for random pure quantum states. Schmidt coefficients, i.e., eigenvalues of the reduced density matrix, are expressed in the limit of large Hilbert space size and for arbitrary bipartite splitting as an implicit function of index i.
description: 8 pages
Moment Method for the Boltzmann Equation of Reactive Quaternary Gaseous Mixture
Creators: name: Sarna, Neeraj
name: Oblapenko, Georgii
name: Torrilhon, Manuel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We are interested in solving the Boltzmann equation of chemically reacting rarefied gas flows using the Grad's-14 moment method. We first propose a novel mathematical model that describes the collision dynamics of chemically reacting hard spheres. Using the collision model, we present an algorithm to compute the moments of the Boltzmann collision operator. Our algorithm is general in the sense that it can be used to compute arbitrary order moments of the collision operator and not just the moments included in the Grad's-14 moment system. For a first-order chemical kinetics, we derive reaction rates for a chemical reaction outside of equilibrium thereby, extending the Arrhenius law that is valid only in equilibrium. We show that the derived reaction rates (i) are consistent in the sense that at equilibrium, we recover the Arrhenius law and (ii) have an explicit dependence on the scalar fourteenth moment, highlighting the importance of considering a fourteen moment system rather than a thirteen one. Through numerical experiments we study the relaxation of the Grad's-14 moment system to the equilibrium state.
Single-shot quantum machine learning
Creators: name: Recio-Armengol, Erik
name: Eisert, Jens
name: Meyer, Johannes Jakob
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum machine learning aims to improve learning methods through the use of quantum computers. If it is to ever realize its potential, many obstacles need to be overcome. A particularly pressing one arises at the prediction stage because the outputs of quantum learning models are inherently random. This creates an often considerable overhead, as many executions of a quantum learning model have to be aggregated to obtain an actual prediction. In this work, we analyze when quantum learning models can evade this issue and produce predictions in a near-deterministic way -- paving the way to single-shot quantum machine learning. We give a rigorous definition of single-shotness in quantum classifiers and show that the degree to which a quantum learning model is near-deterministic is constrained by the distinguishability of the embedded quantum states used in the model. Opening the black box of the embedding, we show that if the embedding is realized by quantum circuits, a certain depth is necessary for single-shotness to be even possible. We conclude by showing that quantum learning models cannot be single-shot in a generic way and trainable at the same time.
description: 12+6 pages
Visual Guide: How to utilize NodeXL importers and further functionalities.
Creators: name: Espinoza-González, Verónica
Publisher: name: Zenodo
Year: 2024
Subjects: NodeXL
DataScience
NetworkScience
DataVisualization
Guide
Technical note
Tools
Research

description: This Visual Guide provides a comprehensive explanation of how to use NodeXL Importers and how to visualize networks from external data. This guide was created by Dr. Verónica Espinoza and is freely accessible. The guide provides a step-by-step walkthrough on how to import data from various sources, including Twitter, Instagram, Reddit, Flickr, YouTube, WhatsApp, and others.
Calopteryx splendens Harris 1782
Creators: name: Hagen, H.
Publisher: name: Zenodo
Year: 1863
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Calopterygidae
Calopteryx
Calopteryx splendens

description: 34. C. splendens Harr.
Klein-Asien, Algier, ganz Europa.
description: Published as part of Hagen, H., 1863, Die Odonaten- und Nenropteren-Fauna Syriens und Klein-Asiens, pp. 193-199 in Wiener Entomologische Monatschrift 7 on page 197, DOI: 10.5281/zenodo.3528093
The Wave Function Behavior of the Open Topological String Partition Function on the Conifold
Creators: name: Kashani-Poor, Amir-Kian
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We calculate the topological string partition function to all genus on the conifold, in the presence of branes. We demonstrate that the partition functions for different brane backgrounds (smoothly connected along a quantum corrected moduli space) can be interpreted as the same wave function in different polarizations. This behavior has a natural interpretation in the Chern-Simons target space description of the topological theory. Our detailed analysis however indicates that non-perturbatively, a modification of real Chern-Simons theory is required to capture the correct target space theory of the topological string. We perform our calculations in the framework of a free fermion representation of the open topological string, demonstrating that this framework extends beyond the simple C^3 geometry. The notion of a fermionic brane creation operator arises in this setting, and we study to what extent the wave function properties of the partition function can be extended to this operator.
description: 43 pages; v2: small clarification, typos corrected, reference added; v3: exposition improved, typos corrected; v4: discussion of phase space improved, subsection on non-perturbative terms added, version published in JHEP
Negative-curvature spacetime solutions for graphene
Creators: name: Gallerati, Antonio
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Materials Science (cond-mat.mtrl-sci)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We provide a detailed analysis of the electronic properties of graphene-like materials with charge carriers living on a curved substrate, focusing in particular on constant negative-curvature spacetime. An explicit parametrization is also worked out in the remarkable case of Beltrami geometry, with an analytic solution for the pseudoparticles modes living on the curved bidimensional surface. We will then exploit the correspondent massless Dirac description, to determine how it affects the sample local density of states.
description: 20 pages, 4 figures
Dynamical leakage of Majorana mode into side-attached quantum dot
Creators: name: Baranski, J.
name: Baranska, M.
name: Zienkiewicz, T.
name: Taranko, R.
name: Domanski, T.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We study a hybrid structure, comprising the single-level quantum dot attached to the topological superconducting nanowire, inspecting dynamical transfer of the Majorana quasiparticle onto normal region. Motivated by the recent experimental realization of such heterostructure and its investigation under the stationary conditions [L. Schneider et al., https://doi.org/10.1038/s41467-020-18540-3, Nature Communications 11, 4707 (2020)] where the quantum dot energy level can be tuned by gate potential we examine how much time is needed for the Majorana mode to leak into the normal region. We estimate, that for typical hybrid structures this dynamical process would take about 20 nanoseconds. We propose a feasible empirical protocol for its detection by means of the time-resolved Andreev tunneling spectroscopy.
description: 9 pages, 5 figures
Real-Time Segmentation of Non-Rigid Surgical Tools based on Deep Learning and Tracking
Creators: name: García-Peraza-Herrera, Luis C.
name: Li, Wenqi
name: Gruijthuijsen, Caspar
name: Devreker, Alain
name: Attilakos, George
name: Deprest, Jan
name: Poorten, Emmanuel Vander
name: Stoyanov, Danail
name: Vercauteren, Tom
name: Ourselin, Sébastien
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Real-time tool segmentation is an essential component in computer-assisted surgical systems. We propose a novel real-time automatic method based on Fully Convolutional Networks (FCN) and optical flow tracking. Our method exploits the ability of deep neural networks to produce accurate segmentations of highly deformable parts along with the high speed of optical flow. Furthermore, the pre-trained FCN can be fine-tuned on a small amount of medical images without the need to hand-craft features. We validated our method using existing and new benchmark datasets, covering both ex vivo and in vivo real clinical cases where different surgical instruments are employed. Two versions of the method are presented, non-real-time and real-time. The former, using only deep learning, achieves a balanced accuracy of 89.6% on a real clinical dataset, outperforming the (non-real-time) state of the art by 3.8% points. The latter, a combination of deep learning with optical flow tracking, yields an average balanced accuracy of 78.2% across all the validated datasets.
description: Accepted in CARE Workshop, held in conjunction with MICCAI 2016
Calopteryx syriaca Rambur 1842
Creators: name: Hagen, H.
Publisher: name: Zenodo
Year: 1863
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Calopterygidae
Calopteryx
Calopteryx syriaca

description: 35. C. syriaca Rbr.
Syrien, Egypten.
description: Published as part of Hagen, H., 1863, Die Odonaten- und Nenropteren-Fauna Syriens und Klein-Asiens, pp. 193-199 in Wiener Entomologische Monatschrift 7 on page 197, DOI: 10.5281/zenodo.3528093
Where's the Dust?: The Deepening Anomaly of Microwave Emission in NGC 4725 B
Creators: name: Murphy, E. J.
name: Hensley, B. S.
name: Linden, S. T.
name: Draine, B. T.
name: Dong, D.
name: Momjian, E.
name: Helou, G.
name: Evans, A. S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We present new Atacama Large Millimeter Array (ALMA) observations towards NGC 4725 B, a discrete, compact, optically-faint region within the star-forming disk of the nearby galaxy NGC 4725 that exhibits strong anomalous microwave emission (AME). These new ALMA data include continuum observations centered at 92, 133, 203, and 221 GHz accompanied by spectral observations of the $^{12}$CO ($J=2\rightarrow1$) line. NGC 4725 B is detected in the continuum at all frequencies, although the detection at 203 GHz is marginal. While molecular gas is not detected at the exact location of NGC 4725 B, there is molecular gas in the immediate vicinity (i.e., $\lesssim 100$ pc) along with associated diffuse 8 $μ$m emission. When combined with existing Very Large Array continuum data at 1.5, 3, 5.5, 9, 14, 22, 33, and 44 GHz, the spectrum is best fit by a combination of AME, synchrotron, and free-free emission that is free-free absorbed below $\sim6$ GHz. Given the strength of the AME, there is surprisingly no indication of millimeter dust emission associated with NGC 4725 B on $\lesssim$6\arcsec~spatial scales at the sensitivity of the ALMA interferometric data. Based on the properties of the nearest molecular gas complex and the inferred star formation rate, NGC 4725 B is consistent with being an extremely young ($\sim 3-5$ Myr) massive ($\lesssim 10^{5} M_{\odot}$) cluster that is undergoing active cluster feedback. However, the lack of millimeter thermal dust emission is difficult to reconcile with a spinning dust origin of the 30 GHz emission. On the other hand, modeling NGC 4725 B as a new class of background radio galaxy is also unsatisfactory.
description: 15 pages, 4 figures, accepted for publication in ApJ Letters
Η επίδραση της ηλεκτρονικής δημοσιογραφίας και κυρίως των blogs στην ελληνική κοινή γνώμη:
Creators: name: Μυλωνάς, Βασίλειος Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2011
Subjects: Διαδίκτυο
Δημοσιογραφία
Τεχνολογία
Internet
Journalism
Technology

description: Η παρούσα διπλωματική έχει ως αντικείμενο μελέτης το φαινόμενο της διαδικτυακής δημοσιογραφίας, γνωστής και ως "δημοσιογραφία των πολιτών" στην Ελλάδα. Παρουσιάζονται και αναλύονται οι τεχνολογικές, πολιτικές και ιδεολογικές εξελίξεις που συνέβαλαν στη ραγδαία ανάπτυξη νέων υπηρεσιών μέσω του διαδικτύου. Πως ήταν η δημοσιογραφία πριν από κάποια χρόνια και πως είναι τώρα. Αρχικά θα γίνει μια εισαγωγή για να εξηγηθούν ορισμένες βασικές πτυχές της δημοσιογραφίας γενικότερα. Βασικά χαρακτηριστικά όπως οι αξίες και τα ήθη της δημοσιογραφίας θα αναλυθούν και θα εξετάσουμε κατά πόσο ισχύουν για την διαδικτυακή δημοσιογραφία. Θα αναφερθούν τα είδη της δημοσιογραφίας δίνοντας βάρος στην διαδικτυακή. Έπειτα η εργασία θα επικεντρωθεί στην επίδραση της τεχνολογίας στη δημοσιογραφία. Θα αναπτυχθούν οι θέσεις της σχετικής βιβλιογραφίας και θα παρατεθούν προσωπικές εκτιμήσεις και τα συμπεράσματα. Το τελευταίο κομμάτι της διπλωματικής θα λειτουργήσει ως εισαγωγή για τα blogs. Γίνεται μια εκτενής περιγραφική αναφορά σε αυτά, από το πως ξεκίνησαν και που έφτασαν, ποια είναι τα χαρακτηριστικά τους. Επιχειρούμε να εξηγήσουμε γιατί είναι τόσο δημοφιλή, ποια είναι η σχέση τους με τη δημοσιογραφία. Τέλος, γίνεται παράθεση ερευνητικών ευρημάτων για την επιρροή των blogs στη κοινή γνώμη, εκτιμήσεις για το ποια μορφή θα έχουν στο μέλλον και πόσο ακόμα υπολογίζεται θα επηρεάζουν τη δημοσιογραφία.
description: Subject of study in the current thesis is the phenomenon of internet journalism, also known as "people's journalism", in Greece. The latest technological, political and ideological advancements, which had an important role on the development of new internet services, are being presented. What are the differences of journalism between now and a few years back. At first there will be an introduction in order to explain some aspects of journalism in general. Most known of its flavors are referenced. Basic characteristics such as values and morals are being analyzed whether they apply on internet journalism. The views of current bibliography are presented, as also personal views and conclusions. The last part of this thesis is an introduction to blogs. There is a thorough reference on them: how did they start, where are they now, what are their characteristics. We try to explain why their use is so widespread among many people and is their relation with journalism. In the end there are some findings from a research concerning the effects of blogs on public views, how are they going to develop in the future and how are they going to affect journalism.
The Electro-Weak model as low-energy sector of 8-dimensional General Relativity
Creators: name: Cianfrani, Francesco
name: Montani, Giovanni
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In a Kaluza-Klein background $V^4\otimes S^3$, we provide a way to reproduce, by the dimensional reduction, a 4-spinor with a SU(2) gauge coupling. Since additional gauge violating terms cannot be avoided, we compute their order of magnitude by virtue of the application to the Electro-Weak model.
description: 5 pages, to appear in the Proceedings of the 1st Stueckelberg Workshop
Modular quantum computing and quantum-like devices
Creators: name: Mendes, R. Vilela
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: Emerging Technologies (cs.ET)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The two essential ideas in this paper are, on the one hand, that a considerable amount of the power of quantum computation may be obtained by adding to a classical computer a few specialized quantum modules and, on the other hand, that such modules may be constructed out of classical systems obeying quantum-like equations where a space coordinate is the evolution parameter (thus playing the role of time in the quantum algorithms).
description: 36 pages Latex, 6 figures
The roles of the CD45 tyrosine phosphate in thymocyte development and T cell receptor signalling
Creators: name: Ong, Christopher John
Publisher: name: University of British Columbia
Year: 2009

description: The molecular basis for T cell receptor signaling events that lead to differential cellular immune responses has been a fundamental question in immunology. For example, the molecular mechanism governing positive and negative T cell selection during thymocyte development has remained elusive. Furthermore, the mechanisms governing variable T cell receptor-mediated responses of different T cell subsets, such as memory and naive T cells have remained unclear. In a gain-of-function transgenic strategy, we have established that augmented CD45R⁰ expression enhanced the efficacy of TCR signaling and TCR-mediated apoptosis of immature CD4⁺CD8⁺ thymocytes in vitro. Furthermore, CD45 was also found to regulate both positive and negative selection events during thymocyte development. In addition, CD45 was determined to be a marker for a population of thymocytes undergoing positive selection. We have further demonstrated that distinct CD45 isoforms have differential functions in T cell activation and signaling in mature thymic T cells as well as differentially regulating thymocyte development.
Ten-year optical monitoring of PKS 0735+178: historical comparison, multiband behaviour and variability timescales
Creators: name: Ciprini, S.
name: Takalo, L. O.
name: Tosti, G.
name: Raiteri, C. M.
name: Fiorucci, M.
name: Villata, M.
name: Nucciarelli, G.
name: Lanteri, L.
name: Nilsson, K.
name: Ros, J. A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: New data and results on the optical behaviour of the blazar PKS 0735+178 are presented. In addition the whole historical light curve, and a new photometric calibration of comparison stars are reported. Optical spectral indexes are calculated and studied on years scales, while several methods for time-series analysis are applied to the whole historical series and to each observing season of our data set. This allowed to search and identify optical variability modes, characteristic timescales and the signal power spectrum over 3 decades in time. In the last 10 years the optical flux of PKS 0735+178 exhibited a rather achromatic long-term behaviour and a variability mode resembling the shot-noise. The brightness level was in an intermediate/low state with a mild flaring activity and a superimposition/succession of rapid and slower flares, with no extraordinary/isolated outbursts but, at any rate, characterized by 1 major active phase in 2001. Several mid-term scales (days, weeks) were found, the more common falling into values of about 27-28 days, 50-56 days and 76-79 days. The rapid variability in the historical curve appear to be modulated by a general, slower and rather oscillating trend, where typical timescales of about 4.5, 8.5 and 11-13 years can be identified. This spectral and temporal analysis, accompanying our data publication, suggests the occurrence of distinctive variability signatures at days/weeks scales, that can likely be of transitory nature. On the other hand the possible pseudo-cyclical or multi-component modulations at long times could be more stable, recurrent and correlated to the bimodal radio flux behaviour and the twisted radio structure observed by many years in this blazar.
description: 21 pages, 13 figures, 3 tables. Typeset with a LaTex2e-AMSLaTex code prepared by the author (using AA vers. 6.1, June 2006, class, and natbib, hyperref, graphicx, packages). Accepted for publication in Astronomy & Astrophysics
THEORETICAL BASIS OF THE DEVELOPMENT OF EDUCATIONAL ACTIVITY OF FUTURE PRIMARY CLASS TEACHERS
Creators: name: Abdiyazova, Sarvinoz
Publisher: name: Zenodo
Year: 2024

description: In this thesis, the theoretical foundations of the development of the educational activity of future primary school teachers are highlighted. Innovative approaches and modern educational technologies are used in order to increase the professional competence of teachers, organize the educational process effectively and develop creative thinking skills of students.
Transient Double-beam Spectrograph for the 2.5-m Telescope of the Caucasus Mountain Observatory of SAI MSU
Creators: name: Potanin, S. A.
name: Belinski, A. A.
name: Dodin, A. V.
name: Zheltoukhov, S. G.
name: Lander, V. Yu.
name: Postnov, K. A.
name: Savvin, A. D.
name: Tatarnikov, A. M.
name: Cherepashchuk, A. M.
name: Cheryasov, D. V.
name: Chilingarian, I. V.
name: Shatsky, N. I.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The Transient Double-beam Spectrograph (TDS) is designed for optical low-resolution observations of non-stationary and extragalactic sources with the 2.5-m telescope of Caucasus Mountain Observatory of the Sternberg Astronomical Institute. It operates simultaneously in a short-wavelength (360--577 nm, reciprocal dispersion 1.21 A/pixel, resolving power R=1300 with a 1 arcsec slit) and long-wavelength (567--746 nm, 0.87 A/pixel, R=2500) channels. The light is split by a dichroic mirror with a 50% transmission at 574 nm. In the "blue" channel, the automatic replacement of the grating by a grism with a double resolving power is possible. Two CCD-cameras use E2V 42-10 detectors cooled down to $-70^\circ$C with a readout noise of 3 $e-$ at a readout rate of 50 kHz. The spectrograph is equipped with a back slit viewer camera and a calibration unit allowing to record a comparison spectrum from a hollow cathode lamp for wavelength calibration or from an LED source with a continuous spectrum (the "flat field") to take into account the vignetting and uneven slit illumination. The throughput of the entire optical path without slit loss is 20% at the zenith in the "blue" and 35% in the "red" channel. Excluding the atmosphere and the telescope, the efficiency of the TDS itself reaches a maximum of 47% and 65% respectively. The spectrograph is permanently mounted in the Cassegrain focus of the 2.5-m telescope of CMO SAI MSU sharing the port with a wide-field photometric CCD-camera. The spectrograph is fed by the light from a folding mirror introduced into the optical path. Since November 2019, TDS has been used for regular observations of non-stationary stars and extragalactic sources up to 20-th mag in a 2-h exposure with a signal-to-noise ratio >5 per pixel.
description: 18 pages, 11 figures, 1 table. Accepted in Astronomy Letters
Bias correction and confidence intervals following sequential tests
Creators: name: Lai, Tze Leung
name: Su, Zheng
name: Chuang, Chin Shan
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics
subject: 62L12, 62G09, 62G20 (Primary) 60F05. (Secondary)

description: An important statistical inference problem in sequential analysis is the construction of confidence intervals following sequential tests, to which Michael Woodroofe has made fundamental contributions. This paper reviews Woodroofe's method and other approaches in the literature. In particular it shows how a bias-corrected pivot originally introduced by Woodroofe can be used as an improved root for sequential bootstrap confidence intervals.
description: Published at http://dx.doi.org/10.1214/074921706000000590 in the IMS Lecture Notes--Monograph Series (http://www.imstat.org/publications/lecnotes.htm) by the Institute of Mathematical Statistics (http://www.imstat.org)
Epallage fatime Charpentier 1840
Creators: name: Hagen, H.
Publisher: name: Zenodo
Year: 1863
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Euphaeidae
Epallage
Epallage fatime

description: 36. Epallage Fatime Charp.
Syrien (Lederer), Cypern, Klein- Asien bei Mermeriza, Türkei, Griechenland (in Acarnanien Krüper).
description: Published as part of Hagen, H., 1863, Die Odonaten- und Nenropteren-Fauna Syriens und Klein-Asiens, pp. 193-199 in Wiener Entomologische Monatschrift 7 on page 197, DOI: 10.5281/zenodo.3528093
On noncommutative weighted local ergodic theorems
Creators: name: Mukhamedov, Farrukh
name: Karimov, Abdusalom
Publisher: name: arXiv
Year: 2007
Subjects: subject: Operator Algebras (math.OA)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 46L50, 46L55, 46L53, 47A35, 35A99

description: In the present paper we consider a von Neumann algebra M with a faithful normal semi-finite trace $\t$, and $\{α_ t\} $ a strongly continuous extension to $L^p(M,\t)$ of a semigroup of absolute contractions on $L^1 (M,τ)$. By means of a non-commutative Banach Principle we prove for a Besicovitch function b and $x\in L^p(M,\t)$, the averages \frac{1}{T}\int_0^Tb(t)\a_t(x)dt converge bilateral almost uniform in $L^p(M,\t)$ as $T\to 0$.
description: 11 pages. submitted
LeMMINGs. II. The e-MERLIN legacy survey of nearby galaxies. The deepest radio view of the Palomar sample on parsec scale
Creators: name: Baldi, R. D.
name: Williams, D. R. A.
name: McHardy, I. M.
name: Beswick, R. J.
name: Brinks, E.
name: Dullo, B. T.
name: Knapen, J. H.
name: Argo, M. K.
name: Aalto, S.
name: Alberdi, A.
name: Baan, W. A.
name: Bendo, G. J.
name: Corbel, S.
name: Fenech, D. M.
name: Gallagher, J. S.
name: Green, D. A.
name: Kennicutt, R. C.
name: Klöckner, H. -R.
name: Körding, E.
name: Maccarone, T. J.
name: Muxlow, T. W. B.
name: Mundell, C. G.
name: Panessa, F.
name: Peck, A. B.
name: Pérez-Torres, M. A.
name: Romero-Cañizales, C.
name: Saikia, P.
name: Shankar, F.
name: Spencer, R. E.
name: Stevens, I. R.
name: Varenius, E.
name: Ward, M. J.
name: Yates, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present the second data release of high-resolution ($\leq0.2$ arcsec) 1.5-GHz radio images of 177 nearby galaxies from the Palomar sample, observed with the e-MERLIN array, as part of the LeMMINGs (Legacy e-MERLIN Multi-band Imaging of Nearby Galaxy Sample) survey. Together with the 103 targets of the first LeMMINGs data release, this represents a complete sample of 280 local active (LINER and Seyfert) and inactive galaxies HII galaxies and Absorption Line Galaxies, ALG). This large program is the deepest radio survey of the local Universe, $\gtrsim$10$^{17.6}$ W Hz$^{-1}$, regardless of the host and nuclear type: we detect radio emission $\gtrsim$0.25 mJy beam$^{-1}$ for 125/280 galaxies (44.6 per cent) with sizes of typically $\lesssim$100 pc. Of those 125, 106 targets show a core which coincides within 1.2 arcsec with the optical nucleus. Although we observed mostly cores, around one third of the detected galaxies features jetted morphologies. The detected radio core luminosities of the sample range between $\sim$10$^{34}$ and 10$^{40}$ erg s$^{-1}$. LINERs and Seyferts are the most luminous sources, whereas HII galaxies are the least. LINERs show FRI-like core-brightened radio structures, while Seyferts reveal the highest fraction of symmetric morphologies. The majority of HII galaxies have single radio core or complex extended structures, which probably conceal a nuclear starburst and/or a weak active nucleus (seven of them show clear jets). ALGs, which are typically found in evolved ellipticals, although the least numerous, exhibit on average the most luminous radio structures, similar to LINERs.
description: Accepted for publication on MNRAS (48 pages, 7 figures, 10 tables, Appendix)
title: Social Change in Rural Alaska: Attitudes, Sense of Belonging, and Migration Intentions of High School Students
Creators: name: Carley, Lisa R.
Publisher: name: Old Dominion University
publisherIdentifier: https://ror.org/04zjtrb98
publisherIdentifierScheme: ROR
Year: 1994

description: Using 1992 survey data collected from high school students in 15 Alaskan towns and villages, this study investigated migration intentions of adolescents. Previous studies on adolescents' migration intentions have concentrated on comparing youth in areas experiencing natural resource development with youth in other areas. However, these studies have found few differences based on rapid resource development. Previous analysis of the Alaska survey data shows few. if any, differences in migration intentions of students in an area with recent mineral development and students in a traditional fishing area. Differences were found between boys and girls and between town and village students. More girls than boys and more village students than town students indicated an intention to live most of the rest of their lives outside their home communities. This study advances the understanding of migration intentions by considering attitudes toward the environment. attitudes toward community, and sense of belonging. It was hypothesized that pro-environmental attitudes, pro-community attitudes, and a strong sense of belonging will decrease intent to out-migrate. These relationships were further examined by controlling for gender, size of community (Town/Village), and Native Tribe (Inupiat/Yup'ik). The results of this study indicate one's sense of belonging and size of community are the best predictors of migration intentions. Those with a strong sense of belonging and those who live in villages are less likely to expect to live most of their lives away from their home communities.
Covariance estimation for multivariate conditionally Gaussian dynamic linear models
Creators: name: Triantafyllopoulos, K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Methodology (stat.ME)
subject: Applications (stat.AP)
subject: FOS: Computer and information sciences

description: In multivariate time series, the estimation of the covariance matrix of the observation innovations plays an important role in forecasting as it enables the computation of the standardized forecast error vectors as well as it enables the computation of confidence bounds of the forecasts. We develop an on-line, non-iterative Bayesian algorithm for estimation and forecasting. It is empirically found that, for a range of simulated time series, the proposed covariance estimator has good performance converging to the true values of the unknown observation covariance matrix. Over a simulated time series, the new method approximates the correct estimates, produced by a non-sequential Monte Carlo simulation procedure, which is used here as the gold standard. The special, but important, vector autoregressive (VAR) and time-varying VAR models are illustrated by considering London metal exchange data consisting of spot prices of aluminium, copper, lead and zinc.
description: 21 pages, 2 figures, 6 tables
The logic of contextuality
Creators: name: Abramsky, Samson
name: Barbosa, Rui Soares
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: Logic in Computer Science (cs.LO)
subject: Logic (math.LO)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Mathematics

description: Contextuality is a key signature of quantum non-classicality, which has been shown to play a central role in enabling quantum advantage for a wide range of information-processing and computational tasks. We study the logic of contextuality from a structural point of view, in the setting of partial Boolean algebras introduced by Kochen and Specker in their seminal work. These contrast with traditional quantum logic à la Birkhoff and von Neumann in that operations such as conjunction and disjunction are partial, only being defined in the domain where they are physically meaningful. We study how this setting relates to current work on contextuality such as the sheaf-theoretic and graph-theoretic approaches. We introduce a general free construction extending the commeasurability relation on a partial Boolean algebra, i.e. the domain of definition of the binary logical operations. This construction has a surprisingly broad range of uses. We apply it in the study of a number of issues, including: - establishing the connection between the abstract measurement scenarios studied in the contextuality literature and the setting of partial Boolean algebras; - formulating various contextuality properties in this setting, including probabilistic contextuality as well as the strong, state-independent notion of contextuality given by Kochen-Specker paradoxes, which are logically contradictory statements validated by partial Boolean algebras, specifically those arising from quantum mechanics; - investigating a Logical Exclusivity Principle, and its relation to the Probabilistic Exclusivity Principle widely studied in recent work on contextuality as a step towards closing in on the set of quantum-realisable correlations; - developing some work towards a logical presentation of the Hilbert space tensor product, using logical exclusivity to capture some of its salient quantum features.
description: 18 pages, to appear in Proceedings of 29th EACSL Annual Conference on Computer Science Logic (CSL 2021)
Spin chain simulations with a meron cluster algorithm
Creators: name: Boyer, Thomas
name: Bietenholz, Wolfgang
name: Wuilloud, Jair
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: High Energy Physics - Lattice (hep-lat)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: We apply a meron cluster algorithm to the XY spin chain, which describes a quantum rotor. This is a multi-cluster simulation supplemented by an improved estimator, which deals with objects of half-integer topological charge. This method is powerful enough to provide precise results for the model with a theta-term - it is therefore one of the rare examples, where a system with a complex action can be solved numerically. In particular we measure the correlation length, as well as the topological and magnetic susceptibility. We discuss the algorithmic efficiency in view of the critical slowing down. Due to the excellent performance that we observe, it is strongly motivated to work on new applications of meron cluster algorithms in higher dimensions.
description: 18 pages, 9 figures, published version
Hemodynamics of the rat and mouse
Creators: name: Phelps, Robyn Lee
Publisher: name: University of British Columbia
Year: 2009

description: There are two theoretical concepts of vertebrate hemodynamics, expressed by the Windkessel and Tubular models. The "Windkessel" is a lumped parameter system in which pressure pulse wave velocity is infinite and wave reflection is impossible. Conceptually, the central arterial vessels cushion flow pulsations while the peripheral arterioles act simply as conduits. In this system, diastolic pressure falls exponentially and wave shapes and amplitudes are identical throughout the arterial tree. In the "Tubular" model, wave velocity is finite and reflected waves augment peripheral pressure and reduce peripheral flow pulsations. Diastolic pressure decline is interrupted by secondary fluctuations and wave shapes and amplitudes are altered during travel. Peripheral resistance (Rs) effects the magnitude of wave reflections while pressure pulse wave velocity (C), cardiac frequency (f₀), and arterial length (L), interact to define their effect on the heart. Simply, f₀ produces oscillating waves where incident and reflected wave summation create nodal and antinodal points in the central aorta. The correct matching of L and C/f₀ places the heart near a pressure node, thereby uncoupling it from the high terminal impedance. However, incorrect matching may promote an early, detrimental return of reflections to the heart. In most mammals, appropriate L/C/f₀ matching reduces systemic impedance, however, this may not occur in very small animals. Simultaneous measurements of aortic arch pressure and flow and abdominal aortic pressures were made under varying physiological conditions in rats and mice. These measurements were used to identify waveform alterations and to calculate systemic impedance in each species. Distal aortic wall properties were described by biomechanical tests. There were no significant differences in arterial mechanicals or anatomy in the rat as compared with other mammals. Cardiovascular indices measured in anesthetized open-chest, ventilated rats were similar to both allometrically estimated, and previously reported, values. In contrast, the abdominal aorta of the mouse was more distensible, measured mean arterial pressure lower, and C slower, than in the rat. Stroke volume was greater, f₀ slower, and Rs less than were estimated allometrically. While wave reflections were observed in the mouse their effects were not discrete. Despite a mismatch in L/C/f₀ inappropriate return of reflections to the heart was prevented by the decrease in Rs and aortic stiffness. While the hemodynamics of the rat can be described by the Tubular model, the systemic impedance of the mouse is minimized primarily through a combination of low Rs and increased central arterial distensibility.
Stochastic near-optimal control: additive, multiplicative, non-Markovian and applications
Creators: name: Lima, Lourival
name: Ruffino, Paulo
name: Souza, Francys
Publisher: name: arXiv
Year: 2020
Subjects: subject: Probability (math.PR)
subject: Optimization and Control (math.OC)
subject: FOS: Mathematics
subject: 93E20, 93E35

description: In this survey we present the near-optimal stochastic control problem according to some recent tools in the literature. In particular, we focus on the approach of a discretization of the noise values instead of the canonical time-discretization. This is the so called {\it skeleton} structure. This allows to obtain an $ε$-optimal control in non-Markovian systems (the main Theorem). A simple example illustrates the technique. The importance of the approach is emphasised in a final section on open problems related to more geometrical framework and discontinuous noise.
Lestes viridis Van der Lind. 1825
Creators: name: Hagen, H.
Publisher: name: Zenodo
Year: 1863
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Odonata
Lestidae
Lestes
Lestes viridis

description: 37. Lestes viridis Van der Lind.
Syrien (Lederer) Klein- Asien, Algier, ganz Süd- und Mittel-Europa.
description: Published as part of Hagen, H., 1863, Die Odonaten- und Nenropteren-Fauna Syriens und Klein-Asiens, pp. 193-199 in Wiener Entomologische Monatschrift 7 on page 197, DOI: 10.5281/zenodo.3528093
Kolmogorov and Irosnikov-Kraichnan scaling in the anisotropic turbulent solar wind
Creators: name: Chapman, S. C.
name: Hnat, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Solar wind turbulence is dominated by Alfvénic fluctuations but the power spectral exponents somewhat surprisingly evolve toward the Kolmogorov value of -5/3, that of hydrodynamic turbulence. We show that at 1AU the turbulence decomposes linearly into two coexistent components perpendicular and parallel to the local average magnetic field. The first of these is consistent with propagating Alfvén wavepackets and shows the scaling expected of Alfvénic turbulence, namely Irosnikov- Kraichnan. The second shows Kolmogorov scaling which we also find in the number and magnetic energy density, and Poynting flux.
description: 4 pages, 6 figures, submitted PRL
The HERMES-TP/SP background and response simulations
Creators: name: Campana, R.
name: Fuschino, F.
name: Evangelista, Y.
name: Dilillo, G.
name: Fiore, F.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: HERMES (High Energy Rapid Modular Ensemble of Satellites) is an innovative mission aiming to observe transient high-energy events such as gamma-ray bursts (GRBs) through a constellation of CubeSats hosting a broadband X and gamma-ray detector. The detector is based on a solid-state Silicon Drift Detector (SDD) coupled to a scintillator crystal, and is sensitive in the 2 keV to 2 MeV band. An accurate evaluation of the foreseen in-orbit instrumental background is essential to assess the scientific performance of the experiment. An outline of the Monte Carlo simulations of the HERMES payload will be provided, describing the various contributions on the total background and the optimization strategies followed in the instrument design. Moreover, the simulations were used in order to derive the effective area and response matrices of the instrument, also as a function of the source location with respect to the detector frame of reference.
description: 8 pages, 7 figures. Proceedings of SPIE "Astronomical Telescopes and Instrumentation" 2020