cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The synthesis and characterization of water soluble platinum (II) pophyrins and their potential as radiosensitizers
Creators: name: Ravensbergen, James A.
Publisher: name: University of British Columbia
Year: 2008

description: Cancerous tumors are commonly treated with the use of radiation therapy. Treatment of tumors is difficult, however, due to the fact that tumor cells replicate quickly enough to cut off their supply of oxygen from the vascular system. The lack of oxygen creates regions of hypoxia in the tumor, which are resistant to radiation. The radio resistance of these hypoxic regions arises because dioxygen present in healthy tissues interacts with radiation to create toxic, high-energy radicals which damage important cellular components. In order to increase the ratio of cancerous, hypoxic tumor cell kill to healthy cell kill, compounds which emulate the effect of oxygen have been developed. Such compounds are termed radiosensitizers. The synthesis of novel platinum(II) porphyrins was undertaken in an attempt to create effective new radiosensitizers. Platinum complexes of the methylated pyridinium porphyrins(shown in the figure below) were synthesized, and characterized by elemental analysis, 1H and 195Pt NMR spectroscopy, UV/Vis, and mass spectroscopy. Preliminary in vitro testing was also undertaken on (3) and(4). (3) accumulated in Chinese Hamster Ovary (CHO) cells to an extent twice that of (4), while neither showed any signs of toxicity toward CHO cells up to 100 1.1M concentrations. Neither (3) nor (4)showed any signs of radiosensitization in hypoxic conditions at platinum(II) porphyrin concentrations of 100^. (1) Platinum-5,15-bis(4-nitropheny1)-10,20-bis(4-methylpyridinium)porphyrin R1=R3=^NO2 R2 = R4 =-0-€3-1CH3 (2) platinum-5,10-bis(4-nitropheny1)-15,20-bis(4-methylpyridinium)porphyrin Ri=R2=^NO2 -C\ INC2C R3 = R4 =^H3 (3) platinum-5-(4-nitropheny1)-10,15,20-tris(4-methylpyridinium)porphyrin R1 =^NO2 R2 = R3 = R4 = -CN-CH3 (4)platinum-5, 10, 15, 20-tetra(4-methylpyridinium) porphyrin _ 0 RI = R2 = R3 = R4 = --CN—CH3 List of platinum(II) porphyrins synthesized and characterized.
The subterahertz solar cycle: Polar and equatorial radii derived from SST and ALMA
Creators: name: Menezes, Fabian
name: Selhorst, Caius L.
name: de Castro, Carlos Guillermo Giménez
name: Valio, Adriana
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: At subterahertz frequencies -- i.e., millimeter and submillimeter wavelengths -- there is a gap of measurements of the solar radius as well as other parameters of the solar atmosphere. As the observational wavelength changes, the radius varies because the altitude of the dominant electromagnetic radiation is produced at different heights in the solar atmosphere. Moreover, radius variations throughout long time series are indicative of changes in the solar atmosphere that may be related to the solar cycle. Therefore, the solar radius is an important parameter for the calibration of solar atmospheric models enabling a better understanding of the atmospheric structure. In this work we use data from the Solar Submillimeter-wave Telescope (SST) and from the Atacama Large Millimeter/submillimeter Array (ALMA), at the frequencies of 100, 212, 230, and 405 GHz, to measure the equatorial and polar radii of the Sun. The radii measured with extensive data from the SST agree with the radius-vs-frequency trend present in the literature. The radii derived from ALMA maps at 230 GHz also agree with the radius-vs-frequency trend, whereas the 100-GHz radii are slightly above the values reported by other authors. In addition, we analyze the equatorial and polar radius behavior over the years, by determining the correlation coefficient between solar activity and subterahertz radii time series at 212 and 405 GHz (SST). The variation of the SST-derived radii over 13 years are correlated to the solar activity when considering equatorial regions of the solar atmosphere, and anticorrelated when considering polar regions. The ALMA derived radii time series for 100 and 230 GHz show very similar behaviors with those of SST.
description: 10 pages, 5 figure, 3 tables, 1 equation
Analytic Perturbation Theory Model for QCD and Upsilon Decay
Creators: name: Shirkov, D. V.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: An elegant and more precise formula for the 3-loop perturbative QCD coupling is discussed. It improves the common expression (e.g., canonized by PDG) in few GeV region. On its base, we propose simple analytic Model for ghost-free QCD running couplings and their effective powers within the Analytic Perturbation Theory, in both the space-like (Euclidean) and time-like (Minkowskian) regions, very accurate in the range above 1 GeV. Effectiveness of the new Model is illustrated by the example of Upsilon(1S) decay where the standard analysis gives $α_s(M_{\Ups})=0.170\pm 0.004$ value that is inconsistent with the bulk of data. Instead, we obtain $α_s(M_{\Ups})=0.185\pm 0.005$ that corresponds to $α_s(M_Z)=0.120\pm 0.002 $ that is close to the world average.
description: 9 pages, to be published in Proceedings of Workshop "e+e- Collisions from Phi to Psi" (Novosibirsk, Feb 2006) at Nucl Phys B (Proce. Suppl.)
Absolute Frequency Measurement of the 378 nm Transition in Thallium
Creators: name: Chen, Tzu-Ling
name: Fan, Isaac
name: Lin, Chang-Yi
name: Chen, Hsuan-Chen
name: Chen, Shih-En
name: Shy, Jow-Tsong
name: Liu, Yi-Wei
Publisher: name: arXiv
Year: 2007
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The absolute frequency measurement for all of the hyperfine transitions of 6P1/2 -> 7S1/2 using a self-referencing frequency comb is reported. This transition can be used as a bench marker for the accurate atomic wave function, and then improve the calculation of the atomic parity- non-conservation (PNC). The frequency center is precisely determined by saturation spectroscopy utilizing a pair of the counter-propagating laser beams intersecting with atomic beam. Such a Doppler-free profile has been improved to 350 kHz in the absolute frequency measurement. The 7S1/2 state hyperfine splittings have also been deduced from our results.
Creativity in a Cultural Context
Creators: name: Irwin, Rita L.
name: Reynolds, J. Karen
Publisher: name: Canadian Journal of Native Education
Year: 2021

description: This paper describes a study of 20 Ojibwe Native Canadians' conceptions of creativity. The findings suggest that creative thought processes of individuals, although liberating, are tied to and defined by social, cultural, ethical, and historical contexts or systems within the culture. The Ojibwe respondents elaborated on conditions that are necessary for fostering creativity. Time, material, an atmosphere of cooperation, psychological safety, and psycho­ logical freedom are conditions under which all persons may be creative and under which creativity is an all-pervasive aspect of life.
description: Canadian Journal of Native Education, Vol. 19 No. 1 (1992)
Supplementary document for Lithography-free tunable absorber at visible region via one dimensional photonic crystals consisting of an α-MoO3 layer - 5781677.pdf
Creators: name: Sang, Tian
name: Pei, Yao
name: Mi, Qing
name: Li, Shi
name: Yang, Chaoyu
name: wang, yueke
name: Cao, Guoyang
Publisher: name: Optica Publishing Group
Year: 2022
Subjects: Uncategorized

description: Supplement 1
Wobbling double sine-Gordon kinks
Creators: name: Campos, João G. F.
name: Mohammadi, Azadeh
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Pattern Formation and Solitons (nlin.PS)
subject: FOS: Physical sciences

description: We study the collision of a kink and an antikink in the double sine-Gordon model with and without the excited vibrational mode. In the latter case, we find that there is a limited range of the parameters where the resonance windows exist, despite the existence of a vibrational mode. Still, when the vibrational mode is initially excited, its energy can turn into translational energy after the collision. This creates one-bounce as well as a rich structure of higher-bounce resonance windows that depend on the wobbling phase being in or out of phase at the collision and the wobbling amplitude being sufficiently large. When the vibrational mode is excited, the modified structure of one-bounce windows is observed in the whole range of the model's parameters, and the resonant interval with higher-bounce windows gradually increases with the wobbling amplitude. We estimated the center of the one-bounce windows using a simple analytical approximation for the wobbling evolution. The kinks' final wobbling frequency is Lorentz contracted, which is simply derived from our equations. We also report that the maximum energy density value always has a smooth behavior in the resonance windows.
description: 19 pages, 12 figuers
Double exchange model for correlated electrons in systems with $t_{2g}$ orbital degeneracy
Creators: name: Wohlfeld, Krzysztof
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We formulate the double exchange (DE) model for systems with $t_{2g}$ orbital degeneracy, relevant for hole-doped cubic vanadates. In the relevant regime of strong on-site Coulomb repulsion $U$ we solve the model using two distinct mean-field approximations: Hartree-Fock, and mean-field applied to the formulation of the model in the Kotliar-Ruckenstein slave boson representation. We show how, due to the relative weakness of the DE mechanism via $t_{2g}$ degenerate orbitals, the anisotropic C-type antiferromagnetic metallic phase and the orbital liquid state can be stabilized. This is contrasted with the DE mechanism via $e_g$ degenerate orbitals which stabilizes the ferromagnetic order in the hole-doped regime of manganites. The obtained results are in striking agreement with the observed magnetic structures and the collapse of the orbital order in the doped La$_{1-x}$Sr$_x$VO$_3$, Pr$_{1-x}$Ca$_x$VO$_3$ and Nd$_{1-x}$Sr$_x$VO$_3$.
description: 10 pages, 2 figures; to appear in: Lectures on the Physics of Highly Correlated Electron Systems X, AIP (2006); this is a more introductory and thorough version of cond-mat/0604384 with (in addition) solutions of the model within Hartree-Fock approximation being discussed
Die tribologischen Eigenschaften Silicium-basierter Keramiken in Isooctan unter Berücksichtigung der Umgebungsatmosphäre
Creators: name: Schreiber, Paul J.
Publisher: name: Karlsruhe
Year: 2019
Subjects: Tribologie
Reibung
Verschleiß
Isooctan
Keramik
superlubricity
Supraschmierung
Siliciumcarbid
Siliciumnitrid

description: Im Rahmen dieser Arbeit wurden die tribologischen Eigenschaften von selbstgepaartem Siliciumcarbid (SSiC) und Siliciumnitrid (Si₃N₄) unter dem Einfluss verschiedener Atmosphären (feuchte Luft, trockene Luft und trockener Stickstoff) charakterisiert, wobei die Wirkflächen der Keramiken zu jeder Zeit der Experimente durch Einsatz eines Tauchbades vollständig von Isooctan bedeckt waren. Die Versuche wurden allesamt in einer konformen Pellet Platte Konfiguration (Kontaktfläche nominell: ⌀ 9,5 mm) durchgeführt und es wurden eine reversierende Gleitbewegung mit Hublänge s = 5 mm, Hubfrequenzen von f = 2,5 bis 20 Hz und eine Normalkraft von Fₙ = 200 N gewählt. Die Ergebnisse zeigen, dass die chemischen Einflüsse aus der Umgebung trotz des Tauchbades signifikante Effekte auf das Reibungs- und Verschleißverhalten der beiden keramischen Werkstoffe haben. Im Falle des SSiC führte eine Atmosphäre aus feuchter Luft zu unruhigen Reibzahlverläufen mit kurzzeitigen Reibzahlüberhöhungen und generell höheren Reibwerten als in trockener Luft oder Stickstoffatmosphäre. Für Si₃N₄ äußerte sich der Einfluss überwiegend in veränderten Verschleißbeträgen und entstehenden Oberflächentopographien, hierbei führte Feuchtigkeit zur Bildung inselartiger, sauerstoffreicher Bereiche auf den Kontaktflächen. Durch den Einsatz kleinster Mengen einer grenzflächenaktiven Substanz (AOT) konnten Reib- und Verschleißverhalten beider Keramiken auf ein näherungsweise einheitliches Niveau gebracht werden. Zudem konnte nachgewiesen werden, dass für selbstgepaartes SSiC in Kombination mit Isooctan ein Übergang des Tribosystems in die flüssige Supraschmierfähigkeit mit Reibwerten von µ
Οι συνοδικές επιτροπές της Εκκλησίας της Ελλάδος
Creators: name: Κυριάκου, Αντώνιος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Συνοδικές Επιτροπές
Εκκλησία της Ελλάδος
Σύνοδος
Synodical Committees
Church of Greece
Synod

description: Στην παρούσα μεταπτυχιακή διπλωματική εργασία παρουσιάζονται το νομικό-κανονιστικό πλαίσιο του θεσμού των Συνοδικών Επιτροπών στην Εκκλησία της Ελλάδος, καθώς και η ιστορική του εξέλιξη. Συγκεκριμένα, αναλύονται τα σχετικά με τη συγκρότηση, τη λειτουργία και τις αρμοδιότητες των Συνοδικών Επιτροπών άρθρα του Ν.Δ. 126/1969 και του Ν. 590/1977, καθώς και των συναφών Κανονισμών της Ιεράς Συνόδου. Επίσης, μέσα από τη μελέτη αδημοσίευτου αρχειακού υλικού του Ιστορικού Αρχείου της Εκκλησίας της Ελλάδος, νομοθετικών πηγών της εποχής καθώς και σχεδίων καταστατικών χαρτών, διερευνάται η ανάπτυξη του συνοδικού θεσμού στην Εκκλησία της Ελλάδος, παράλληλα με το θεσμό των Συνοδικών Επιτροπών.
description: In this diploma thesis is represented the legal framework of the Synodical Committees in the Church of Greece and its historical evolution. Specially all the relative with the formation of Synodical Committees articles of the Constitutions Charters of 1969 and 1977, as the relative regulations of Holy Synod. Also, through the study of unpublished archives of the Historical Archives of the Church of Greece, legislative resources and outline constitutions charters, is looked into exposition of synodical rule in the Church of Greece, parallel with the rules of the Synodical Committees.
Presenting a Method for Improving Echo Hiding
Creators: name: Rafiee, Haniyeh
name: Fakhredanesh, Mohammad
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cryptography and Security (cs.CR)
subject: Multimedia (cs.MM)
subject: FOS: Computer and information sciences

description: In this article, one of the most important methods of steganography on VoIP called echo hiding is improved. This method has advantages in maintaining the statistical and perceptual characteristics of audio signals as well as security against the sensitivity of the human audio system (HAS). However, it has lots of errors in detecting coded and hidden messages, which is detectable using existing steganalysis methods. The percentage of extracting messages in these improved methods of echo hiding is high, but they lower the security of the method. In this article, a method is presented to improve the method of extracting echo hiding, and enhance its security through a combined method based on spread spectrum. To improve the extraction, a wrong hypothesis is corrected and substituted. To improve security using a pseudo-random key generation algorithm, spread spectrum and echo hiding methods are used randomly. To evaluate the proposed extraction, numerous extraction tests are carried out in the normal state and in the event of attacks. A steganalyser has also been used to assess security improvements. The results gained through different experiments on the security of steganography indicate a 3-percent increase in steganalysis errors. The proposed extraction method was modified based on the main method and resulted in more than 10% improvement.
description: 14 page, This paper is printed in Journal of Computer and Knowledge Engineering, Vol. 2, No. 1
Μελέτη αλληλεπιδράσεων διαφορετικών συστημάτων του ανθρώπινου οργανισμού μέσω θεωρίας γράφων κατά τη διάρκεια του ύπνου σε πρωτόκολλο φαρμακευτικής διακοπής καπνίσματος
Creators: name: Παπακυριάκου, Σωτηρία Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Ύπνος
Κάπνισμα
Θεωρία γράφων
Sleep
Smoking
Graph theory

description: Η παρούσα εργασία στοχεύει στην αξιολόγηση της ποιότητας του ύπνου, πριν και μετά τη διακοπή του καπνίσματος με τη βοήθεια κατάλληλης φαρμακευτικής αγωγής, μέσω της ποσοτικοποίησης των αλληλεπιδράσεων της εγκεφαλικής με την καρδιακή, οφθαλμική και μυϊκή δραστηριότητα κατά τη διάρκεια του ύπνου. Στην εργασία περιγράφονται διάφορες διαταραχές του ύπνου και της αναπνοής στον ύπνο καθώς και οι επιπτώσεις του καπνίσματος σε αυτές και γενικότερα στον οργανισμό του ανθρώπου. Επιπλέον αναλύονται η διεργασία και τα στάδια του ύπνου, τα βιολογικά σήματα τα οποία συλλέχθηκαν μέσω πολυκαναλικών καταγραφών κατά τη διάρκεια του ύπνου καθώς επίσης και τα χαρακτηριστικά που εξήχθησαν από κάθε καταγραφή. Τέλος περιγράφεται η πειραματική διαδικασία και τα αποτελέσματα που προέκυψαν από αυτή.
description: The present study aims at evaluating the quality of sleep, before and after smoking cessation with suitable medicinal treatment, by quantifying the various interactions of the cerebral with the cardiac, ocular and muscular activity during sleep. In this project, multiple sleep disorders and breathing disorders related to sleep are described, as well as, the effect of smoking on them and on the human physiology in general. Furthermore, the function and stages of sleep are analyzed, along with the biological signals that were gathered by polysomnographic recordings during sleep and the characteristics that were extracted from each measurement. Finally, the experimental procedure and the results are outlined.
description: Γεωλογίας
Topological Strings and (Almost) Modular Forms
Creators: name: Aganagic, Mina
name: Bouchard, Vincent
name: Klemm, Albrecht
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Algebraic Geometry (math.AG)
subject: Number Theory (math.NT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: The B-model topological string theory on a Calabi-Yau threefold X has a symmetry group Gamma, generated by monodromies of the periods of X. This acts on the topological string wave function in a natural way, governed by the quantum mechanics of the phase space H^3(X). We show that, depending on the choice of polarization, the genus g topological string amplitude is either a holomorphic quasi-modular form or an almost holomorphic modular form of weight 0 under Gamma. Moreover, at each genus, certain combinations of genus g amplitudes are both modular and holomorphic. We illustrate this for the local Calabi-Yau manifolds giving rise to Seiberg-Witten gauge theories in four dimensions and local P_2 and P_1 x P_1. As a byproduct, we also obtain a simple way of relating the topological string amplitudes near different points in the moduli space, which we use to give predictions for Gromov-Witten invariants of the orbifold C^3/Z_3.
description: 62 pages, 1 figure; v2: minor corrections
Separability in terms of a single entanglement witness
Creators: name: Badziąg, Piotr
name: Horodecki, Paweł
name: Horodecki, Ryszard
name: Augusiak, Remigiusz
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The separability problem is formulated in terms of a characterization of a single entanglement witness. More specifically, we show that any (in general multipartite) state \varrho is separable if and only if a specially constructed entanglement witness W_{\varrho} is weakly optimal, i.e., its expectation value vanishes on at least one product vector. Interestingly, the witness can always be chosen to be decomposable. Our result changes the conceptual aspect of the separability problem and rises some questions about properties of positive maps.
description: 4.4 pages, 1 figure, published version
From Founding Father to Pious Son: Filiation, Language, and Royal Inheritance in Alfonso X, the Learned
Creators: name: Szpiech, Ryan
Publisher: name: University of Milan
Year: 2015
Subjects: Alfonso X el Sabio; translatio studii et imperii; filiation; genealogy; translation; Arabic astronomy; Cantigas de Santa María; Setenario; San Fernando III

description: The influence of King Alfonso X of Castile (reg. 1252–1284) has been so wide that modern historians have stressed Alfonso’s foundational role as a ‘father’ of many Castilian cultural institutions and areas of writing, including prose literature, science, the legal code, and vernacular historiography. This paper argues that the modern focus on Alfonso’s foundational, ‘fatherly’ role, while logical in the context of modern literary historiography, is at odds with Alfonso’s own medieval view of himself as a ‘son’ and heir, one who inherited rather than founded cultural institutions. It proposes that a reorientation of Alfonsine studies according to this medieval worldview, one focused less on Alfonso’s innovations and foundations and more on his continuty with and dependance on his forebears, will permit a clearer portrayal of Alfonso’s importance in medieval literary history. To this end, it explores Aflonso’s representation of himself as the ‘son’ of his father, King Fernando III, in the prologues to his scientific translations, in his encomium of his father known as the Setenario, and in song 292 of his Cantigas de Santa María. A reading of these examples is offered as a first step towards the study of filiation and ‘sonship’ in the vast Alfonsine historiographical and legal corpuses.
description: Interfaces: A Journal of Medieval European Literatures, No 1 (2015): Histories of Medieval European Literatures: New Patterns of Representation and Explanation
title: Serruria :
title: Directrices para la ejecución del examen de la distinción, la homogeneidad y la estabilidad.
titleType: Subtitle
Creators: name: International Union For The Protection Of New Varieties Of Plants,
Publisher: name: International Union for the Protection of New Varieties of Plants,
Year: 0
Subjects: Serruria
Group identity.
New Varieties of Plants

description: La finalidad de estas directrices (“directrices de examen”) es elaborar los principios que figuran en la Introducción General (documento TG/1/3) y sus documentos TGP conexos, con objeto de que sirvan de orientación práctica y detallada para el examen armonizado de la distinción, homogeneidad y estabilidad (DHE) y en particular, para identificar los caracteres apropiados para el examen DHE y producir descripciones armonizadas de variedades.
Identification and Development of Therapeutics for COVID-19
Creators: name: Rando, Halie M.
name: Wellhausen, Nils
name: Ghosh, Soumita
name: Lee, Alexandra J.
name: Dattoli, Anna Ada
name: Hu, Fengling
name: Byrd, James Brian
name: Rafizadeh, Diane N.
name: Lordan, Ronan
name: Qi, Yanjun
name: Sun, Yuchen
name: Brueffer, Christian
name: Field, Jeffrey M.
name: Guebila, Marouen Ben
name: Jadavji, Nafisa M.
name: Skelly, Ashwin N.
name: Ramsundar, Bharath
name: Wang, Jinhui
name: Goel, Rishi Raj
name: Park, YoSon
name: Consortium, the COVID-19 Review
name: Boca, Simina M.
name: Gitter, Anthony
name: Greene, Casey S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: FOS: Biological sciences

description: After emerging in China in late 2019, the novel Severe acute respiratory syndrome-like coronavirus 2 (SARS-CoV-2) spread worldwide and as of early 2021, continues to significantly impact most countries. Only a small number of coronaviruses are known to infect humans, and only two are associated with the severe outcomes associated with SARS-CoV-2: Severe acute respiratory syndrome-related coronavirus, a closely related species of SARS-CoV-2 that emerged in 2002, and Middle East respiratory syndrome-related coronavirus, which emerged in 2012. Both of these previous epidemics were controlled fairly rapidly through public health measures, and no vaccines or robust therapeutic interventions were identified. However, previous insights into the immune response to coronaviruses gained during the outbreaks of severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS) have proved beneficial to identifying approaches to the treatment and prophylaxis of novel coronavirus disease 2019 (COVID-19). A number of potential therapeutics against SARS-CoV-2 and the resultant COVID-19 illness were rapidly identified, leading to a large number of clinical trials investigating a variety of possible therapeutic approaches being initiated early on in the pandemic. As a result, a small number of therapeutics have already been authorized by regulatory agencies such as the Food and Drug Administration (FDA) in the United States, and many other therapeutics remain under investigation. Here, we describe a range of approaches for the treatment of COVID-19, along with their proposed mechanisms of action and the current status of clinical investigation into each candidate. The status of these investigations will continue to evolve, and this review will be updated as progress is made.
Cosmological Inflation: A Personal Perspective
Creators: name: Kazanas, Demosthenes
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a brief review of Cosmological Inflation from the personal perspective of the author who almost 30 years ago proposed a way of resolving the problem of Cosmological Horizon by employing certain notions and developments from the field of High Energy Physics. Along with a brief introduction of the Horizon and Flatness problems of standard cosmology, this lecture concentrates on personal reminiscing of the notions and ideas that prevailed and influenced the author's thinking at the time. The lecture then touches upon some more recent developments related to the subject and concludes with some personal views concerning the direction that the cosmology field has taken in the past couple of decades and certain speculations some notions that may indicate future directions of research.
description: 13 pages, 3 figures. Text based on a public lecture presented at the Academy of Athens within the activities of the Symposium "Chaos in Astronomy 2007", held in Athens Greece in September 2007
Twisted modules for vertex operator algebras
Creators: name: Doyon, Benjamin
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Algebra (math.QA)
subject: FOS: Mathematics

description: This contribution is mainly based on joint papers with Lepowsky and Milas, and some parts of these papers are reproduced here. These papers further extended works by Lepowsky and by Milas. Following our joint papers, I explain the general principles of twisted modules for vertex operator algebras in their powerful formulation using formal series, and derive general relations satisfied by twisted and untwisted vertex operators. Using these, I prove new "equivalence" and "construction" theorems, identifying a set of sufficient conditions in order to have a twisted module for a vertex operator algebra, and a simple way of constructing the twisted vertex operator map. This essentially combines our general relations for twisted modules with ideas of Li (1996), who had obtained similar construction theorems using different relations. Then, I show how to apply these theorems in order to construct twisted modules for the Heisenberg vertex operator algebra. I obtain in a new way the explicit twisted vertex operator map, and in particular give a new derivation and expression for the formal operator $Δ_x$ constructed some time ago by Frenkel, Lepowsky and Meurman. Finally, I reproduce parts of our joint papers. The untwisted relations in the Heisenberg vertex operator algebra are employed to explain properties of a certain central extension of a Lie algebra of differential operators on the circle, in relation to the Riemann Zeta function at negative integers. A family of representations for this algebra are constructed from twisted modules for the vertex operator algebra, and are related to the Bernoulli polynomials at rational values.
description: 41 pages, contribution to proceedings of the workshop "Moonshine - the First Quarter Century and Beyond, a Workshop on the Moonshine Conjectures and Vertex Algebras" (Edinburgh, 2004) v2: 43 pages, presentation, discussion and proofs improved
What Is Medieval European Literature?
Creators: name: Borsa, Paolo
name: Høgel, Christian
name: Mortensen, Lars Boje
name: Tyler, Elizabeth
Publisher: name: University of Milan
Year: 2015
Subjects: Europe; medieval; literature; literary history of Middle Ages; history of texts

description: The editors of Interfaces: A Journal of Medieval European Literatures explain the scope and purpose of the new journal by mapping out the significance and possible meanings of the three key terms of the subtitle: ‘literature,’ ‘medieval,’ ‘Europe.’ The specific theme of Issue 1 is introduced: ‘Histories of Medieval European Literatures: New Patterns of Representation and Explanation.’ With respect to this theme, theoretical problems concerning teleology and the present possibilities for literary historical narratives are raised. Finally the editors state the journal’s commitment to a scholarly forum which is non-profit and open-access. The bibliography refers to key critical reading which shapes the journal’s approach to medieval European literatures.
description: Interfaces: A Journal of Medieval European Literatures, No 1 (2015): Histories of Medieval European Literatures: New Patterns of Representation and Explanation
Asymmetric induction in solid state photochemistry
Creators: name: Gudmundsdottir, Anna D.
Publisher: name: University of British Columbia
Year: 2008

description: The enantioselectivity of the di-rr-methane photo rearrangement in chiral crystals was studied. Three achiral dibenzobarrelene carboxylic acid derivatives and one achiral amino dibenzobarrelene derivative were synthesized for this work. These compounds were induced to crystallize as chiral crystals by forming salts with chiral counterions. Photolysis of the chiral crystals resulted in asymmetric induction in the products. The regioselectivity of the photorearrangements of the starting materials prior to salt formation was studied in solution as well as in the solid state. In addition, the photochemistry of the methyl and ethyl esters of the carboxylic acids was also investigated. The photochemistry of some of these dibenzobarrelene derivatives was found to be medium-dependent. Possible structure-reactivity correlations for these compounds, based on X-ray crystallographic data, are discussed. The chiral salts of the dibenzobarrelene derivatives were photolyzed in solution and in the solid state. The extent of asymmetric induction in the crystalline phase was studied by measuring the enantiomeric excess of the photoproducts. No optical activity was observed for the solution photoproducts, presumably because the salts had dissociated. The enantioselectivity of the di-rc-methane photorearrangement in the solid state varied from poor to good, depending on the chiral salt in each instance. The chiralcounterion ensures chiral crystals, but the crystal lattice alone is accountable for asymmetric induction, and different salts crystallized in different crystal packing arrangements leading to varying degrees of asymmetric induction. The absolute steric course of the di-n-methane rearrangement in the solid state was studied. Chiral salts for which the photorearrangements were both regio- and enantioselective were selected for this study. The reaction pathway was mapped by comparing the absolute configuration of the starting material and the photoproduct. After the reaction pathways had been determined, the crystal structures of the starting materials were analyzed in order to identify the crystal forces that control the enantioselectivity of the di-n-methane rearrangement. A general explanation of the factors that control the asymmetric induction of the di-m-methane rearrangement in dibenzobarrelene derivatives was proposed. It was concluded that forming chiral salts of achiral molecules is a convenient and an effective way to study reactions in chiral crystals. Finally, solid state photochromism was discovered for some of the bridgehead-substituted dibenzobarrelene derivatives. Possible intermediates responsible for the photochromic phenomena are suggested.
Search for top squark production in fully-hadronic final states in proton-proton collisions at $\sqrt{s} =$ 13 TeV
Creators: name: CMS Collaboration
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: A search for production of the supersymmetric partners of the top quark, top squarks, is presented. The search is based on proton-proton collision events containing multiple jets, no leptons, and large transverse momentum imbalance. The data were collected with the CMS detector at the CERN LHC at a center-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 137 fb$^{-1}$. The targeted signal production scenarios are direct and gluino-mediated top squark production, including scenarios in which the top squark and neutralino masses are nearly degenerate. The search utilizes novel algorithms based on deep neural networks that identify hadronically decaying top quarks and W bosons, which are expected in many of the targeted signal models. No statistically significant excess of events is observed relative to the expectation from the standard model, and limits on the top squark production cross section are obtained in the context of simplified supersymmetric models for various production and decay modes. Exclusion limits as high as 1310 GeV are established at the 95% confidence level on the mass of the top squark for direct top squark production models, and as high as 2260 GeV on the mass of the gluino for gluino-mediated top squark production models. These results represent a significant improvement over the results of previous searches for supersymmetry by CMS in the same final state.
description: Replaced with the published version. Added the journal reference and the DOI. All the figures and tables, including additional supplementary figures and tables, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SUS-19-010 (CMS Public Pages)
Asymptotic Capacity Bounds for Wireless Networks with Non-Uniform Traffic
Creators: name: Toumpis, Stavros
Publisher: name: arXiv
Year: 2007
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: We develop bounds on the capacity of wireless networks when the traffic is non-uniform, i.e., not all nodes are required to receive and send similar volumes of traffic. Our results are asymptotic, i.e., they hold with probability going to unity as the number of nodes goes to infinity. We study \emph{(i)} asymmetric networks, where the numbers of sources and destinations of traffic are unequal, \emph{(ii)} multicast networks, in which each created packet has multiple destinations, \emph{(iii)} cluster networks, that consist of clients and a limited number of cluster heads, and each client wants to communicate with any of the cluster heads, and \emph{(iv)} hybrid networks, in which the nodes are supported by a limited infrastructure. Our findings quantify the fundamental capabilities of these wireless networks to handle traffic bottlenecks, and point to correct design principles that achieve the capacity without resorting to overly complicated protocols.
French Literature Abroad: Towards an Alternative History of French Literature
Creators: name: Gaunt, Simon
Publisher: name: University of Milan
Year: 2015
Subjects: Old French language; Geffrei Gaimar; Histoire ancienne jusqu’à César; Roman de Troie (third mise en prose); transnational languages

description: What would a history of medieval literature in French that is not focused on France and Paris look like? Taking as its starting point the key role played in the development of textual culture in French by geographical regions that are either at the periphery of French-speaking areas, or alternatively completely outside them, this article offers three case studies: first of a text composed in mid-twelfth century England; then of one from early thirteenth-century Flanders; and finally from late thirteenth-century Italy. What difference does it make if we do not read these texts, and the language in which they are written, in relation to French norms, but rather look at their cultural significance both at their point of production, and then in transmission? A picture emerges of a literary culture in French that is mobile and cosmopolitan, one that cannot be tied to the teleology of an emerging national identity, and one that is a bricolage of a range of influences that are moving towards France as well as being exported from it. French itself functions as a supralocal written language (even when it has specific local features) and therefore may function more like Latin than a local vernacular.
description: Interfaces: A Journal of Medieval European Literatures, No 1 (2015): Histories of Medieval European Literatures: New Patterns of Representation and Explanation
Σχολιασμένη μετάφραση (DE, EL) - Απόσπασμα από το βιβλίο «Λογοτεχνική Μετάφραση» του Γιερν Άλμπρεχτ
Creators: name: Γιαλαμά, Αλεξάνδρα Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2020
Subjects: Σχολιασμένη μετάφραση
Μετάφραση της Βίβλου
Λογοτεχνική μετάφραση
Annotated translation
Bible Translation
Literary Translation

description: Στόχος της παρούσας μεταπτυχιακής εργασίας ήταν η δημιουργία μιας λειτουργικής και ισοδύναμης μετάφρασης ενός ειδικού κειμένου από τη γερμανική στην ελληνική γλώσσα, λαμβάνοντας υπόψη την επικοινωνιακή περίσταση, το είδος και τον σκοπό του κειμένου, καθώς και τα πολιτισμικά και γλωσσολογικά χαρακτηριστικά της κάθε γλώσσας. Το περιεχόμενο της εργασίας αποτελείται από το θεωρητικό και το πρακτικό μέρος. Στο θεωρητικό μέρος αναλύθηκαν οι επικοινωνιακές περιστάσεις του κειμένου-πηγή και του κειμένου-στόχου, έγινε αναφορά στη θεωρία του Σκοπού των Ράις και Φερμέερ και στην κειμενική ανάλυση της Νορντ (Nord) και έγινε μια συνοπτική παρουσίαση και ανάλυση του κειμένου-πηγής. Στη συνέχεια έγινε αναφορά στην ιστορία της μετάφρασης της Βίβλου και στο δίλλημα των μεταφραστών αυτής, μεταξύ πιστής και ελεύθερης μετάφρασης. Το πρακτικό μέρος της εργασίας αποτελείται από την αντιστοιχισμένη μετάφραση, το γλωσσάρι με τους όρους που συλλέχθηκαν και την ορολογική τεκμηρίωση. Σημαντικό μέρος της εργασίας αποτέλεσε και η παράθεση και ανάλυση των μεταφραστικών προβλημάτων που προέκυψαν κατά τη μεταφραστική διαδικασία καθώς και η παρουσίαση του τρόπου προσέγγισης και επίλυσης αυτών. Συμπέρασμα της εργασίας αυτής ήταν ότι η θεωρία και πράξη είναι δύο πράγματα αλληλένδετα, καθώς η θεωρία αποτελεί τη βάση για τις μεταφραστικές επιλογές ενός μεταφραστή.
description: Aim of the present master thesis was the creation of a functional and equivalent translation of a specialized text from German into Greek, taking into consideration the communicative context, the type and the purpose of the text, as well as the cultural and linguistic characteristics of each language. This thesis consists of two parts: theory and practice. In the theoretical part have been analyzed the communicative circumstances both of the source-text and the target-text. There were also references to Skopos theory of Katharina Reiss and HansVermeer and the text analysis of Christiane Nord. Furthermore, bible translation history and the dilemma of bible translators, between literal and free translation, were also mentioned and examined. The practical part includes the translation, the glossary with the terms collected from the text and the documentation of their meaning. In the practical part are also included the analysis of translation problems arose during translation process and the presentation of the way they have been approached and handled. Conclusion of this thesis is that theory and practice are interrelated, because theory is the basis of translator’s choices and decisions during translation process.
Eigenvalue spectrum and scaling dimension of lattice $\mathcal{N} = 4$ supersymmetric Yang-Mills
Creators: name: Bergner, Georg
name: Schaich, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We investigate the lattice regularization of $\mathcal{N} = 4$ supersymmetric Yang-Mills theory, by stochastically computing the eigenvalue mode number of the fermion operator. This provides important insight into the non-perturbative renormalization group flow of the lattice theory, through the definition of a scale-dependent effective mass anomalous dimension. While this anomalous dimension is expected to vanish in the conformal continuum theory, the finite lattice volume and lattice spacing generically lead to non-zero values, which we use to study the approach to the continuum limit. Our numerical results, comparing multiple lattice volumes, 't Hooft couplings, and numbers of colors, confirm convergence towards the expected continuum result, while quantifying the increasing significance of lattice artifacts at larger couplings.
description: 24 pages, 13 figures
Physical Conditions in the LMC's Quiescent Molecular Ridge: Fitting Non-LTE Models to CO Emission
Creators: name: Finn, Molly K.
name: Indebetouw, Remy
name: Johnson, Kelsey E.
name: Costa, Allison H.
name: Chen, C. H. Rosie
name: Kawamura, Akiko
name: Onishi, Toshikazu
name: Ott, Jürgen
name: Tokuda, Kazuki
name: Wong, Tony
name: Zahorecz, Sarolta
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The Molecular Ridge in the LMC extends several kiloparsecs south from 30 Doradus, and it contains ~30% of the molecular gas in the entire galaxy. However, the southern end of the Molecular Ridge is quiescent - it contains almost no massive star formation, which is a dramatic decrease from the very active massive star-forming regions 30 Doradus, N159, and N160. We present new ALMA and APEX observations of the Molecular Ridge at a resolution as high as ~16'' (~3.9 pc) with molecular lines 12CO(1-0), 13CO(1-0), 12CO(2-1), 13CO(2-1), and CS(2-1). We analyze these emission lines with our new multi-line non-LTE fitting tool to produce maps of T_kin, n_H2, and N_CO across the region based on models from RADEX. Using simulated data for a range of parameter space for each of these variables, we evaluate how well our fitting method can recover these physical parameters for the given set of molecular lines. We then compare the results of this fitting with LTE and X_CO methods of obtaining mass estimates and how line ratios correspond with physical conditions. We find that this fitting tool allows us to more directly probe the physical conditions of the gas and estimate values of T_kin, n_H2, and N_CO that are less subject to the effects of optical depth and line-of-sight projection than previous methods. The fitted n_H2 values show a strong correlation with the presence of YSOs, and with the total and average mass of the associated YSOs. Typical star formation diagnostics, such as mean density, dense gas fraction, and virial parameter do not show a strong correlation with YSO properties.
description: Accepted for publication in the Astrophysical Journal
Systematic study of the SU(3)_c X SU(4)_L X U(1)_X gauge symmetry
Creators: name: Ponce, William A.
name: Sanchez, Luis A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We carry a systematic study of possible extensions of the standard model based on the gauge group SU(3)_c X SU(4)_L X U(1)_X. We consider both models with particles with exotic electric charges and models which do not contain exotic electric charges neither in the gauge boson sector nor in the fermion sector. For the first case an infinite number of models can, in principle, be constructed, while the restriction to non-exotic electric charges only allows for eight different anomaly-free models. Four of them are three-family models in the sense that anomalies cancel by an interplay between the three families, and another two are one-family models where anomalies cancel family by family as in the standard model. The remaining two are two-family models.
description: 16 pages, no figures. To appear in Mod. Phys. Lett. A
Synthesis and some related studies of alkyl 2,3-bis(alkylidene)cyclopentanecarboxylates
Creators: name: Wong, Timothy
Publisher: name: University of British Columbia
Year: 2009

description: With the use of lithium (trimethylstannyl)(cyano)cuprate (123), α, β -acetylenic esters of general structure 100 were converted into the corresponding alkyl (E)- and (Z)-3- trimethylstannyl-2-alkenoates 89 and 91. Homoallylic diiodides of general structures 98 and 99 were synthesized, via a sequence of transformations, from the corresponding esters 89 and 91, respectively. Deconjugation-alkylation of ailcyl (E)- and (Z)-3-trimethylstannyl-2- ailcenoates 89 and 91 with electrophiles 96 and 97, provided, stereoselectively, the functionalized esters of general structure 206. Palladium(0)-catalyzed intramolecular cross-coupling reaction of esters 206 provided alkyl 2,3-bis(alkylidene)cyclopentanecarboxylates of general structure 219 in good yields and in a stereochemically defmed fashion. Thus, a general strategy for the preparation of alkyl 2,3-bis (alkylidene)cyclpentanecarboxylates possessing E,E-, E,Z- and Z,Z configurations (i.e. 81,82 and 84) was established. The limitations of this palladiumcatalyzed intramolecular coupling reaction were shown by the inability to provide the Z,E diene 230 in a stereocontrolled manner, and by the low yield obtained in the preparation of 229. The dihedral angles between the two exocycic C=C bonds in the (Z,Z)-diene system of general structure 84 were determined by X-ray crystallographic analysis of crystalline derivatives of alkyl (Z,Z)-2,3-bis(alkylidene)cyclopentanecarboxylates 222, 228 and 229. The magnitude of the dihedral angles in compounds 237,238,241, 243 and 247 ranges from 48.6° to 58.00. A new CuCl-mediated intramolecular coupling reaction of vinyl halide and vinyltrimethylstannane functions was discovered in conjunction with studies directed toward the synthesis of the Z,E-diene 230 in a stereochemically defined manner and toward the optimization of the yield in the preparation of 229. This method has been applied successfully to the preparation of a number of alkyl 2,3-bis(alkylidene)cyclopentanecarboxylates possessing E,E-, E,Z-, Z,E- and Z,Z-configurations (81,82,83 and 84) and to the synthesis of a variety of bicydic compounds containing a conjugated diene system (253,289-293). A provisional mechanism was proposed for this new coupling procedure. The Diels-Alder reactions of the dienophiles TCNE and MVK with the alkyl 2,3- bis(alkylidene)cyclopentanecarboxylates of general slructure 219 as well as the related dienes of general structure 314 were investigated. It was found that these Diels-Alder reactions occur with high face-, endo/exo- and regioselectivities. [chemical compound diagrams]