cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
A 2 - Component Generalization of the Degasperis - Procesi Equation
Creators: name: Popowicz, Z.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We present two different hamiltonian extensions of the Degasperis - Procesi equation to the two component equations. The construction based on the observation that the second Hamiltonian operator of the Degasperis - Procesi equation could be considered as the Dirac reduced Poisson tensor of the second Hamiltonian operator of the Boussinesq equation. The first extension is generated by the Hamiltonian operator which is a Dirac reduced operator of the generalized but degenerated second Hamiltonian operator of the Boussinesq equation. The second one is obtained by the N=2 supersymmetric extension of the mentioned method. As the byproduct of this procedure we obatined the Hamiltonian system of interacting equations which contains the Camassa - Holm and Degasperis - Procesi equation.
description: 12 pages, LaTex, corrected typos, extended version of second and third section
[Frases padrão em mỹky]
Creators: name: Mỹky, Janaxi
name: Mỹky, Kiwuxi
name: Rondon Amarante, Elizabeth
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: irn

description: 2 arquivos WAV. Lado A 192-268, Lado B 269-325. Frases repetidas por várias falantes mulheres. Os nomes dos falantes referem-se apenas ao Lado B. Digitalizado pelo Berkeley Language Center.
Αυτοματοποιημένη ανάκτηση και επεξεργασία βιβλιογραφικών κειμένων με σκοπό την αξιολόγηση ιατρικών υποθέσεων
Creators: name: Παπαϊωάννου, Κρυσταλία Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: ανάλυση συναισθήματος
κατηγοριοποίηση κειμένου
μηχανική μάθηση
sentiment analysis
text classification
machine learning

description: Στα πλαίσια της παρούσας εργασία μελετήθηκε διεξοδικά η Ανάλυση Συναισθήματος: η βασική ορολογία, οι συνηθέστερες προσεγγίσεις και κατηγοριοποιητές. Γίνεται ακόμη αναφορά στη γενικότερη μεθοδολογία της μηχανικής μάθησης που ήταν και η μέθοδος που επιλέχθηκε για το πρακτικό κομμάτι. Ομοίως μελετήθηκαν και οι Μηχανές Διανυσμάτων Υποστήριξης εις βάθος, καθώς έγινε χρήση τους στην εφαρμογή. Το πρακτικό μέρος της εργασίας είναι μια web εφαρμογή η οποία συνδέεται με το API του PubMed, με σκοπό την ανάκτηση των περιλήψεων επιστημονικών άρθρων. Η αναζήτηση γίνεται με βάση μια φαρμακευτική ουσία και μια παρενέργεια, και η εφαρμογή επιχειρεί να κατηγοριοποιήσει την άποψη το συγγραφέα (αν αυτή αναγράφεται) κάνοντας χρήση Ανάλυσης Συναισθήματος
description: The following thesis was centered on a thorough study of Sentiment Analysis, covering basic terms, common approaches and classifiers. There is also mention made of the general methodology followed in machine learning approaches, as they were the subject of the practical aspect of the thesis. Similarly, Support Vector Machines were also covered in earnest, and then subsequently applied in the program. The practical aspect of this thesis is a web application which connects to the PubMed API to extract the abstracts off medical publications available. The search terms are a pharmaceutical substance and a side effect, and the app attempts to classify the author’s opinion on the relation between the two (assuming it is included in the abstract) using Sentiment Analysis
Mädchen und junge Frauen mit Behinderung besser vor Gewalt schützen
Creators: name: Vogt, Kathrin
Publisher: name: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG)
Year: 2016

description: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG), IFFOnZeit Nr. 5 (2016)
The Relativistic Binary Programme on MeerKAT: Science objectives and first results
Creators: name: Kramer, M.
name: Stairs, I. H.
name: Krishnan, V. Venkatraman
name: Freire, P. C. C.
name: Abbate, F.
name: Bailes, M.
name: Burgay, M.
name: Buchner, S.
name: Champion, D. J.
name: Cognard, I.
name: Gautam, T.
name: Geyer, M.
name: Guillemot, L.
name: Hu, H.
name: Janssen, G.
name: Lower, M. E.
name: Parthasarathy, A.
name: Possenti, A.
name: Ransom, S.
name: Reardon, D. J.
name: Ridolfi, A.
name: Serylak, M.
name: Shannon, R. M.
name: Spiewak, R.
name: Theureau, G.
name: van Straten, W.
name: Wex, N.
name: Oswald, L. S.
name: Posselt, B.
name: Sobey, C.
name: Barr, E. D.
name: Camilo, F.
name: Hugo, B.
name: Jameson, A.
name: Johnston, S.
name: Karastergiou, A.
name: Keith, M.
name: Oslowski, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We describe the ongoing Relativistic Binary programme (RelBin), a part of the MeerTime large survey project with the MeerKAT radio telescope. RelBin is primarily focused on observations of relativistic effects in binary pulsars to enable measurements of neutron star masses and tests of theories of gravity. We selected 25 pulsars as an initial high priority list of targets based on their characteristics and observational history with other telescopes. In this paper, we provide an outline of the programme, present polarisation calibrated pulse profiles for all selected pulsars as a reference catalogue along with updated dispersion measures. We report Faraday rotation measures for 24 pulsars, twelve of which have been measured for the first time. More than a third of our selected pulsars show a flat position angle swing confirming earlier observations. We demonstrate the ability of the Rotating Vector Model (RVM), fitted here to seven binary pulsars, including the Double Pulsar (PSR J0737$-$3039A), to obtain information about the orbital inclination angle. We present a high time resolution light curve of the eclipse of PSR J0737$-$3039A by the companion's magnetosphere, a high-phase resolution position angle swing for PSR J1141$-$6545, an improved detection of the Shapiro delay of PSR J1811$-$2405, and pulse scattering measurements for PSRs J1227$-$6208, J1757$-$1854, and J1811$-$1736. Finally, we demonstrate that timing observations with MeerKAT improve on existing data sets by a factor of, typically, 2-3, sometimes by an order of magnitude.
description: 21 pages 16 figures, published in MNRAS (replaced earlier submission after small changes added in proofs)
Midisuperspace foam and the cosmological constant
Creators: name: Carlip, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Wheeler's conjectured "spacetime foam" -- large quantum fluctuations of spacetime at the Planck scale -- could have important implications for quantum gravity, perhaps even explaining why the cosmological constant seems so small. Here I explore this problem in a midisuperspace model consisting of metrics with local spherical symmetry. Classically, an infinite class of ``foamy'' initial data can be constructed, in which cancellations between expanding and contracting regions lead to a small average expansion even if $Λ$ is large. Quantum mechanically, the model admits corresponding stationary states, for which the probability current is also nearly zero. These states appear to describe a self-reproducing spacetime foam with very small average expansion, effectively hiding the cosmological constant.
description: 20 pages; v2: added discussion of meaning of integration constant, reduced phase space quantization
Διεθνής Κρατική Ευθύνη: Η Αποζημίωση ως Μορφή Αποκατάστασης
Creators: name: Κολοβέτσιου Μπαλιάφα, Μελίνα Αθανασίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Διεθνές δίκαιο
Διεθνής κρατική ευθύνη
Αποζημίωση
International Law
International Responsibility of States
Compensation

description: Η παρούσα μελέτη χωρίζεται σε δύο μέρη και εξετάζει το ισχύον δίκαιο της διεθνούς κρατικής ευθύνης, εν όψει των εξελίξεων που έχουν λάβει χώρα στο πεδίο της θεωρίας και της πράξης. Στο πρώτο μέρος, η προβληματική εστιάζει στη λειτουργία της σύγχρονης κρατικής διεθνούς ευθύνης που πηγάζει από διεθνείς αδικοπραξίες. Βάση του όλου θεσμού αποτελεί το Σχέδιο άρθρων της Επιτροπής Διεθνούς Δικαίου και εν προκειμένω γίνεται ιστορική ανάλυση και αναφορά στις βασικές αρχές του, με έμφαση στην αποκαταστατική του λειτουργία. Στη συνέχεια η μελέτη επικεντρώνεται στην ανάλυση της αποζημίωσης ως μορφής αποκατάστασης μέσω όχι μόνο μελέτης της θεωρίας και της υπάρχουσας διεθνούς νομοθεσίας αλλά και της διεθνούς νομολογίας διεθνών, περιφερειακών, διαιτητικών δικαστηρίων και διαιτητικών οργάνων
description: The present study is divided in two parts and analyzes the international state responsibility law in force, in view of the developments that have taken place in theory and practice. In the first part, the study focuses on the function of international state responsibility for internationally wrongful acts. The Draft Articles on State Responsibility for internationally wrongful acts constitutes the basis of the institution and a historical analysis and reference to its basic principles with a focal point on its reparative function is attempted here. In the second part, the study analyzes compensation as a form of reparation through research on theory, international legislature and case law of international and regional courts, arbitration tribunals and committees
Συμπεριφορά καταναλωτή ως προς το γάλα
Creators: name: Ψαθάς, Ευστράτιος Ιγνατίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Γάλα
Συμπεριφορά καταναλωτή
Εμπορία αγροτικών προϊόντων
Milk product
Consumer’s behavior
Agricultural Marketing

description: Η σημασία του γάλακτος ως βασικό τρόφιμο για τον άνθρωπο είναι ζωτική τόσο κάτα τα πρώτα βήματα της ανάπτυξής του, όσο και κατά τη διάρκεια της ενήλικης ζωής του. Το γάλα παραδοσιακά θεωρείται φυσική, πλήρης και καθολική τροφή, ενώ αποτελεί τη βασική τροφή των μωρών των θηλαστικών για σημαντικό χρονικό διάστημα αμέσως μετά τη γεννησή τους. Οι θρεπτικές ουσίες από τις οποίες αποτελείται το γάλα και κυρίως το αβέστιο και ο φώσφορος παίζουν καθοριστικό ρόλο στη δημιουργία και τη διαμόρφωση των μυών και του σκελετού. Παρά την αδιαμφισβήτητη σημασία του γάλακτος και του καταλυτικού του ρόλου στον ανθρώπινο οργανισμό, οι καταναλωτές παρουσιάζουν σημάδια άγνοιας των ιδιατεροτήτων του και της πραγματικής αξίας του. Η συμπεριφορά του καταναλωτή εξαρτάται από μια πληθώρα κοινωνικοοικονομικών και ψυχολογικών παραγόντων που επηρεάζουν τις επιλογές του. Αυτοί οι παράγοντες καθώς και κάποιοι συσχετισμοί τους ερευνώνται μέσω της ποιοτικής και ποσοτικής ανάλυσης που επιχειρήθηκε από την παρούσα εργασία, με σκοπό την αξιολόγηση των χαρακτηριστικών που επιδρούν στη συμπεριφορά των καταναλωτών ως προς το γάλα σε περιοχές της Θεσσαλονίκης και η εξαγωγή συμπερασμάτων σχετικών αυτή τη συμπεριφορά
description: The importance of milk as a staple food for humans is vital both during the first steps of its development, and during adult life. The milk is traditionally considered natural, full and complete food, and is the staple food of mammalian babies for a significant period immediately after birth. The nutrients of which milk is comprised and especially calcium and phosphorous play a vital role in creating and shaping the muscles and skeleton. Despite the undeniable importance of milk and its catalytic role in the human body, consumers show signs of ignorance of certain originality and its true value. Consumer’s behavior depends on a variety of socio-economic and psychological factors that influence choices. These factors and some of their associations are investigated by qualitative and quantitative analysis which attempted in this work to evaluate the characteristics affecting consumer’s behavior on milk, in areas of Thessaloniki and the conclusions concerning this behavior
Επενδύοντας στη θρησκεία: Homo economicus και το αίνιγμα της ορθολογικότητας των θρησκευτικών επιλογών
Creators: name: Ορφανίδης, Χρήστος Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ορθολογική επιλογή
Θρησκεία-Θεωρία
Rational choice
Religion-Theory

description: Σκοπός αυτής της διπλωματικής εργασίας ήταν η ευρύτερη θεωρητική επανεξέταση της ορθολογικότητας που συνοδεύει ή δεν συνοδεύει τις θρησκευτικές επιλογές και η εξέταση των σχετικών κλασικών και σύγχρονων οικονομικών θεωρητικών μοντέλων αποφάσεων, αλλά και των νεότερων εξελίξεων στον χώρο της κοινωνικής θεωρίας και της θεωρίας της θρησκείας. Από μεθοδολογικής απόψεως, η εργασία αυτή αποτελεί μία θεωρητική σύνθεση και εστιάζει στην κριτική ανάλυση του περιεχομένου της θεωρίας της “ορθολογικής επιλογής” και των ιδιαίτερων χαρακτηριστικών των εφαρμογών της στη μελέτη της θρησκείας. Ιδιαίτερη έμφαση δόθηκε στην προσπάθεια εμπλουτισμού του αυστηρού νεοκλασικού οικονομικού ωφελιμισμού με διεπιστημονικές προσεγγίσεις που αφορούν στις ανθρώπινες επιλογές
description: The aim of this thesis was the wider theoretical review of the rationality that accompanies or does not accompany religious choices and the examination of the relevant classical and contemporary economic theoretical models of decisions, as well as the recent developments in the field of social theory and theory of religion. Methodology-wise, this paper constitutes a theoretical synthesis and focuses on the critical content analysis of “rational choice theory” and the specifics of its applications in the study of religion. Particular emphasis was placed on the effort of enriching the strict neoclassical economic utilitarianism with interdisciplinary approaches regarding human choices
Charged black hole and radiating solutions in entangled relativity
Creators: name: Minazzoli, Olivier
name: Santos, Edison
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In this manuscript, we show that the external Schwarzschild metric can be a good approximation of exact black hole solutions of entangled relativity. Since entangled relativity cannot be defined from vacuum, the demonstrations need to rely on the definition of matter fields. The electromagnetic field being the easiest (and perhaps the only) existing matter field with infinite range to consider, we study the case of a charged black hole -- for which the solution of entangled relativity and a dilaton theory agree -- as well as the case of a pure radiation -- for which the solution of entangled relativity and general relativity seem to agree, despite an apparent ambiguity in the field equations. Based on these results, we argue that the external Schwarzschild metric is an appropriate mathematical idealization of a spherical black hole in entangled relativity. The extension to rotating cases is briefly discussed.
description: 6 pages
Proposal for suppressing ac Stark shift in the He($2\,^3S_1\rightarrow 3\,^3S_1$) two-photon transition using magic wavelengths
Creators: name: Zhang, Yong-Hui
name: Tang, Li-Yan
name: Shi, Ting-Yun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: Motivated by recent direct measurement of the forbidden $2\,^3S_1\rightarrow3\,^3S_1$ transition in helium [K. F. Thomas et al., Phys. Rev. Lett. 125, 013002(2020)], where the ac Stark shift is one of the main systematic uncertainties, we propose a dichroic two-photon transition measurement for $2\,^3S_1\rightarrow3\,^3S_1$ which could effectively suppress the ac Stark shift by utilizing magic wavelengths: one magic wavelength is used to realize state-insensitive optical trapping, the other magic wavelength is used as one of the two lasers driving the two-photon transition. Carrying out calculations based on the no-pair Dirac-Coulomb-Breit Hamiltonian with mass shift operator included, we report the magic wavelength of 1265.615 9(4) nm for $^4$He [or 1265.683 9(2) nm for $^3$He] can be used to design an optical dipole trap; the magic wavelength of 934.234 5(2) nm for $^4$He [or 934.255 4(4) nm for $^3$He] can be as one excitation laser in the two-photon process, and the ac Stark shift can be reduced to less than 100 kHz, as long as the intensity of the other excitation laser does not exceed $1\times10^4~W/cm^2$. Alternatively, by selecting detuning frequencies relative to the $2\,^3P$ state in the region of 82$\sim$103 THz, as well as adjusting the intensity ratios of the two lasers, the ac Stark shift in the $2\,^3S_1\rightarrow3\,^3S_1$ two-photon transition can be cancelled.
description: 9 pages, 5 figures
Cs 2CO 3-mediated regio- And stereoselective sulfonylation of 1,1-dibromo-1-alkenes with sodium sulfinates
Creators: name: Shiri, Morteza
name: Salehia, Parvin
name: Mohammadpour, Zeinab
name: Salehi, Peyman
name: Notash, Behrouz
Publisher: name: figshare
Year: 2021
Subjects: subject: Organic Chemistry
subject: FOS: Chemical sciences
subject: 30503 Organic Chemical Synthesis
subject: 30504 Organic Green Chemistry
subject: 39904 Organometallic Chemistry
subject: 30505 Physical Organic Chemistry
subject: 30304 Physical Chemistry of Materials
subject: 30207 Transition Metal Chemistry
subject: 30306 Synthesis of Materials
subject: 30307 Theory and Design of Materials
subject: Supramolecular Chemistry
subject: 30605 Solution Chemistry

description: A highly selective synthesis of (Z)-1-bromo-1-sulfonyl
alkenes via Cs2CO3-promoted sulfonylation of 1,1-dibromo-1-alkenes with sodium sulfinates is described. Notably, using excess amounts of Cs2CO3 and sodium sulfinate in such a reaction regenerated the parent aldehyde. Interestingly, the reaction of 1-(2,2-dibromovinyl)-2-nitrobenzene in the presence of sulfinates and Cs2CO3 produced isatin. The Sonogashira cross coupling of
synthesized (Z)-1-bromo-1-sulfonyl
alkenes with phenylacetylene gave selectively the corresponding sulfonylalkynyl alkenes.
Integrated transportation planning in Greater Vancouver: a policy framework
Creators: name: Marlor, David John
Publisher: name: University of British Columbia
Year: 2009

description: Greater Vancouver is a cooperative federalism in which planning relies on consensus and cooperation between municipalities, provincial ministries and Crown corporations. A result of this approach is a system in which each organisation and municipality is responsible for making decisions and funding the issues within its jurisdiction. Often this results in inefficient decisions being made; decisions, that otherwise would have considered regional issues, tend to consider only local concerns. Experience suggests that regional governments are generally distrusted by the general public and may pose a threat to the urban power base of the provincial government. Instead, a conjoint approach - which uses the existing agencies and is activated at key points in the process - offers the optimum configuration. In Greater Vancouver, a commission made up of nine directly elected, nine municipally appointed, and nine provincially appointed councillors will provide a well balanced organisation which is responsible to the province, municipalities, and the public. The new commission will be responsible for creating regional goals and ensuring conformity of the municipalities, ministries and Crown corporations to those goals. Adjustments in the provincial legislations will be required to transfer control and funding functions to the new commission, and to pave the way for a truly integrated transportation planning process for Greater Vancouver.
Cancer cluster detection in British Columbia school districts, 1983-1989
Creators: name: Rosychuk, Rhonda Jean
Publisher: name: University of British Columbia
Year: 2009

description: A disease cluster is an aggregation of occurrences of a disease. The observa tion of a perceived excess number of similar illnesses is termed disease clustering. Statistical tests for disease clustering investigate if the observed pattern of cases in at least one geographical area could possibly have happened by chance alone. This pattern may be spatial, temporal, or both. Investigating possible cancer clusters in British Columbia for the period of 1983—1989 inclusive is the objective of this thesis. Whether or not cancer clustering appears near pulp and paper mills within the province is of specific interest. The geographical units upon which our investigation will be based are the B.C. school districts. The variation in size and population demographics among districts requires a cluster detection method which is considerate of the underlying population distribution within the study region. School district population size diversity requires a modification to the Besag and Newell (1991) method. This modification is implemented with B.C. school district data and several possible clusters are detected for various types of cancer.
The physical nature of the cosmological constant and the decoherence scale in a renormalization-group approach
Creators: name: Viaggiu, Stefano
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper we consider the nature of the cosmological constant as due by quantum fluctuations. Quantum fluctuations are generated at Planckian scales by noncommutative effects and watered down at larger scales up to a decoherence scale $L_D$ where classicality is reached. In particular, we formally depict the presence of the scale at $L_D$ by adopting a renormalization group approach. As a result, an analogy arises between the expression for the observed cosmological constant $\overlineΛ$ generated by quantum fluctuations and the one expected by a renormalization group approach, provided that the renormalization scale $μ$ is suitably chosen. In this framework, the decoherence scale $L_D$ is naturally identified with the value $μ_D$, with $\hbarμ_D$ representing the minimum allowed particle-momentum for our visible universe. Finally, by mimicking renormalization group approach, we present a technique to formally obtain a non-trivial infrared (IR) fixed point at $μ=μ_D$ in our model.
description: Accepted for publication in Int. J. Mod. Phys. D
Paradox in Wave-Particle Duality
Creators: name: Afshar, Shahriar S.
name: Flores, Eduardo
name: McDonald, Keith F.
name: Knoesel, Ernst
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We report on the simultaneous determination of complementary wave and particle aspects of light in a double-slit type "welcher-weg" experiment beyond the limitations set by Bohr's Principle of Complementarity. Applying classical logic, we verify the presence of sharp interference in the single photon regime, while reliably maintaining the information about the particular pinhole through which each individual photon had passed. This experiment poses interesting questions on the validity of Complementarity in cases where measurements techniques that avoid Heisenberg's uncertainty principle and quantum entanglement are employed. We further argue that the application of classical concepts of waves and particles as embodied in Complementarity leads to a logical inconsistency in the interpretation of this experiment.
description: 18 pages, 1 figure
Probing the Halo Gas Distribution in the Inner Galaxy with Fermi Bubble Observations
Creators: name: Zhang, Ruiyu
name: Guo, Fulai
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The hot halo gas distribution in the inner Milky Way (MW) contains key fossil records of the past energetic feedback processes in the Galactic center. Here we adopt a variety of spherical and disk-like MW halo gas models as initial conditions in a series of simulations to investigate the formation of the Fermi bubbles in the jet-shock scenario. The simulation results are compared directly with relevant X-ray and gamma-ray observations of the Fermi bubbles to constrain the halo gas distribution in the inner Galaxy before the Fermi bubble event. Our best-fit gas density distribution can be described by a power law in radius $n_{\rm e}(r)=0.01(r/1 \text{~kpc})^{-1.5}$ cm$^{-3}$. Our study can not determine if there is an inner density core, which if exists, should be very small with size $r_{c} \lesssim 0.5$ kpc. When extrapolating to large radii $r\sim 50-90$ kpc, our derived density distribution lies appreciably below the recently estimated gas densities from ram-pressure stripping calculations, suggesting that the halo gas density profile either flattens out or has one or more discontinuities within $10 \lesssim r \lesssim 50$ kpc. Some of these discontinuities may be related to the eROSITA bubbles, and our derived gas density profile may correspond to the hot gas distribution in the inner eROSITA bubbles about $5$ Myr ago.
description: 16 pages, 12 figures. Accepted for publication ApJ
The Ponzano-Regge model
Creators: name: Barrett, John W.
name: Naish-Guzman, Ileana
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The definition of the Ponzano-Regge state-sum model of three-dimensional quantum gravity with a class of local observables is developed. The main definition of the Ponzano-Regge model in this paper is determined by its reformulation in terms of group variables. The regularisation is defined and a proof is given that the partition function is well-defined only when a certain cohomological criterion is satisfied. In that case, the partition function may be expressed in terms of a topological invariant, the Reidemeister torsion. This proves the independence of our definition on the triangulation of the 3-manifold and on those arbitrary choices made in the regularisation. A further corollary is that when the observable is a knot, the partition function (when it exists) can be written in terms of the Alexander polynomial of the knot. Various examples of observables in the three-sphere are computed explicitly. Alternative regularisations of the Ponzano-Regge model by the simple cutoff procedure and by the limit of the Turaev-Viro model are discussed, giving successes and limitations of these approaches.
description: 66 pages, approx. v2: minor corrections and significant improvements in presentation
Ο Ευρωσκεπτικισμός σε Ελλάδα και Γερμανία κατά τη διάρκεια της κρίσης. Μελέτη ψηφοφόρων και πολιτικού προσωπικού
Creators: name: Ευτυχίδης, Σάββας Παύλου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ευρωσκεπτικισμός Ελλάδα
Ευρωσκεπτικισμός Γερμανία
Ψηφοφόροι- Πολιτικό προσωπικό
Euroscepticism Greece
Euroscepticism Germany
Voter-elit study

description: Η οικονομική κρίση του 2009 έπληξε σε μεγάλο βαθμό την αξιοπιστία της Ε.Ε και τις σχέσεις των κρατών μελών. Την περίοδο που ακολούθησε την κρίση αναδείχθηκαν οι ευρωσκεπτικιστικές τάσεις στο σύνολο της Ε.Ε. τόσο σε επίπεδο ψηφοφόρων όσο και σε επίπεδο πολιτικών ελίτ. Σκοπός της παρούσας διπλωματικής εργασίας είναι η ανάλυση του ευρωσκεπτικιστικού φαινομένου και των τάσεων αυτών στην Ελλάδα και στην Γερμανία. Μέσω ανάλυσης των δεδομένων από τις έρευνες του European Election Study και του Comparative Candidate Study θα επιχειρήσουμε να αποκρυσταλλώσουμε τις τάσεις των ψηφοφόρων και του πολιτικού προσωπικού στις δύο χώρες. Επίσης θα μελετήσουμε πιθανές αιτίες που οδήγησαν εν μέσω κρίσης στην ραγδαία άνοδο του Ευρωσκεπτικισμού στις δύο αυτές παραδοσιακά φιλοευρωπαϊκές χώρες. Η έντονες διαφορές σε οικονομικό και πολιτικό επίπεδο ανάμεσα σε Ελλάδα και Γερμανία αλλά και πορεία τους κατά την διάρκεια της κρίσης τις καθιστούν ιδιαίτερες περιπτώσεις ανόδου του Ευρωσκεπτικισμού και παρουσιάζουν έντονο ερευνητικό ενδιαφέρον.
description: The economic crisis of 2009 managed a great strike in the integrity of the European Union and the relations of the member- states. In the years that followed the crisis Eurosceptic trends rose all over the European Union both at voter and elites level. The aim of the present thesis was to analyze the phenomenon of Euroscepticism and its trends in Greece and Germany. By analyzing the data of two major studies, the European Election Study and the Comparative Candidate Study we tried to crystallize the trends of the voters and the elites in those two countries. We also tried to study the probable causes that led to the rapid rise of Euroscepticism in those two traditionally Europhile countries. Their intense differences in both economical and political level in conjunction with their course during the crisis makes them special cases of rising Euroscepticism and of high value of research interest.
Analytical models for Cross-correlation signal in Time-Distance Helioseismology
Creators: name: Nigam, R.
name: Kosovichev, A. G.
name: Scherrer, P. H.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: In time-distance helioseismology, the time signals (Doppler shifts) at two points on the solar surface, separated by a fixed angular distance are cross-correlated, and this leads to a wave packet signal. Accurately measuring the travel times of these wave packets is crucial for inferring the sub-surface properties in the Sun. The observed signal is quite noisy, and to improve the signal-to-noise ratio and make the cross-correlation more robust, the temporal oscillation signal is phase-speed filtered at the two points in order to select waves that travel a fixed horizontal distance. Hence a new formula to estimate the travel times is derived, in the presence of a phase speed filter, and it includes both the radial and horizontal component of the oscillation displacement signal. It generalizes the previously used Gabor wavelet that was derived without a phase speed filter and included only the radial component of the displacement. This is important since it will be consistent with the observed cross-correlation that is computed using a phase speed filter, and also it accounts for both the components of the displacement. The new formula depends on the location of the two points on the solar surface that are being cross correlated and accounts for the travel time shifts at different locations on the solar surface.
description: 27 pages, 8 figures, ApJ in press
Arbeit, Gesundheit und Geschlecht: Das Beispiel Callcenter
Creators: name: Staiger, Tobias
Publisher: name: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG)
Year: 2016

description: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG), IFFOnZeit Nr. 5 (2016)
The origin of metal-poor stars on prograde disk orbits in FIRE simulations of Milky Way-mass galaxies
Creators: name: Santistevan, Isaiah B.
name: Wetzel, Andrew
name: Sanderson, Robyn E.
name: El-Badry, Kareem
name: Samuel, Jenna
name: Faucher-Giguère, Claude-André
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: In hierarchical structure formation, metal-poor stars in and around the Milky Way (MW) originate primarily from mergers of lower-mass galaxies. A common expectation is therefore that metal-poor stars should have isotropic, dispersion-dominated orbits that do not correlate strongly with the MW disk. However, recent observations of stars in the MW show that metal-poor ([Fe/H] < -2) stars are preferentially on prograde orbits with respect to the disk. Using the FIRE-2 suite of cosmological zoom-in simulations of MW/M31-mass galaxies, we investigate the prevalence and origin of prograde metal-poor stars. Almost all (11 of 12) of our simulations have metal-poor stars on preferentially prograde orbits today and throughout most of their history: we thus predict that this is a generic feature of MW/M31-mass galaxies. The typical prograde-to-retrograde ratio is ~2:1, which depends weakly on stellar metallicity at Fe/H] < -1. These trends predicted by our simulations agree well with MW observations. Prograde metal-poor stars originate largely from a single LMC/SMC-mass gas-rich merger 7 - 12.5 Gyr ago, which deposited existing metal-poor stars and significant gas on an orbital vector that sparked the formation of and/or shaped the orientation of a long-lived stellar disk, giving rise to a prograde bias for all low-metallicity stars. We find sub-dominant contributions from in-situ stars formed in the host galaxy before this merger, and in some cases, additional massive mergers. We find few clear correlations between any properties of our MW/M31-mass galaxies at z = 0 and the degree of this prograde bias as a result of diverse merger scenarios.
description: 18 pages, 8 figures. Accepted for publication in MNRAS
Mentoring an Hochschulen – Wissenschaftskultur im Wandel? Eine empirische Untersuchung aus der Perspektive des Gender- und Diversity Management-Ansatzes
Creators: name: Brocke, Pia Simone
name: Esdar, Wiebke
Publisher: name: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG)
Year: 2016

description: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG), IFFOnZeit Nr. 5 (2016)
Manifolds associated with $(Z_2)^n$-colored regular graphs
Creators: name: Bao, Zhiqiang
name: Lü, Zhi
Publisher: name: arXiv
Year: 2006
Subjects: subject: Geometric Topology (math.GT)
subject: Combinatorics (math.CO)
subject: FOS: Mathematics
subject: 57Q15, 57S17, 05C15, 05C25 (Primary) 20F65, 55N91 (Secondary)

description: In this article we describe a canonical way to expand a certain kind of $(\mathbb Z_2)^{n+1}$-colored regular graphs into closed $n$-manifolds by adding cells determined by the edge-colorings inductively. We show that every closed combinatorial $n$-manifold can be obtained in this way. When $n\leq 3$, we give simple equivalent conditions for a colored graph to admit an expansion. In addition, we show that if a $(\mathbb Z_2)^{n+1}$-colored regular graph admits an $n$-skeletal expansion, then it is realizable as the moment graph of an $(n+1)$-dimensional closed $(\mathbb Z_2)^{n+1}$-manifold.
description: 20 pages with 9 figures, in AMS-LaTex, v4 added a new section on reconstructing a space with a $(Z_2)^n$-action for which its moment graph is a given colored graph
Current-induced dynamics of skyrmion tubes in synthetic antiferromagnetic multilayers
Creators: name: Xia, Jing
name: Zhang, Xichao
name: Mak, Kai-Yu
name: Ezawa, Motohiko
name: Tretiakov, Oleg A.
name: Zhou, Yan
name: Zhao, Guoping
name: Liu, Xiaoxi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Topological spin textures can be found in both two-dimensional and three-dimensional nanostructures, which are of great importance to advanced spintronic applications. Here we report the current-induced skyrmion tube dynamics in three-dimensional synthetic antiferromagnetic (SyAF) bilayer and multilayer nanostructures. It is found that the SyAF skyrmion tube made of thinner sublayer skyrmions is more stable during its motion, which ensures that a higher speed of the skyrmion tube can be reached effectively at larger driving current. In the SyAF multilayer with a given total thickness, the current-induced deformation of the SyAF skyrmion tube decreases with an increasing number of interfaces; namely, the rigidity of the SyAF skyrmion tube with a given thickness increases with the number of ferromagnetic (FM) layers. For the SyAF multilayer with an even number of FM layers, the skyrmion Hall effect can be eliminated when the thicknesses of all FM layers are identical. Larger damping parameter leads to smaller deformation and slower speed of the SyAF skyrmion tube. Larger fieldlike torque leads to larger deformation and a higher speed of the SyAF skyrmion tube. Our results are useful for understanding the dynamic behaviors of three-dimensional topological spin textures and may provide guidelines for building SyAF spintronic devices.
description: 8 pages, 6 figures
Geschlecht erleben – Einige theoretische Überlegungen zum Eigensinn des Leibes und der Materialität von Geschlecht
Creators: name: König, Tomke
Publisher: name: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG)
Year: 2016

description: IZGOnZeit. Onlinezeitschrift des Interdisziplinären Zentrums für Geschlechterforschung (IZG), IFFOnZeit Nr. 5 (2016)
Highly Selective Synthesis of α-Hydroxy, α-Oxy, and α-Oxo Amides by a Post-Passerini Condensation Transformation
Creators: name: Shiri, Morteza
name: Gholami-Koupaei, Zahra
name: Bandehali-Naeini, Farzaneh
name: Maryam-Sadat Tonekaboni
name: Saeedeh Soheil-Moghaddam
name: Delaram Ebrahimi
name: Karamia, Sima
name: Notash, Behrouz
Publisher: name: figshare
Year: 2021
Subjects: subject: 30205 Non-metal Chemistry
subject: FOS: Chemical sciences
subject: 30503 Organic Chemical Synthesis
subject: Organic Chemistry
subject: 30504 Organic Green Chemistry
subject: 39904 Organometallic Chemistry
subject: 30207 Transition Metal Chemistry
subject: 30306 Synthesis of Materials

description: A post-Passerini condensation transformation can be employed in the synthesis of three types of amides: -hydroxy, -oxy, and -oxo amides. K2CO3 efficiently promotes the solvolysis of -acetoxy amides to form -hydroxy amides in methanol. 2-Acetoxy-2-(2-alkynylquinolin-3-yl)acetamides in basic methanol are cyclized to 1,3-dihydrofuro[3,4-b]quinoline-1-carboxamides via deacetylation and 5-exo-dig cyclization. Treatment of 2-hydroxy-2-[2-(phenylethynyl)quinolin-3yl]acetamides with I2 in basic media produces pyrrolo[2,3-b]quinoline2,3-diones. This cyclization involves intramolecular cyclization, dealkynylative aromatization, and oxidation of the secondary alcohol.
Explicit Non-Abelian Monopoles and Instantons in SU(N) Pure Yang-Mills Theory
Creators: name: Popov, Alexander D.
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is well known that there are no static non-Abelian monopole solutions in pure Yang-Mills theory on Minkowski space R^{3,1}. We show that such solutions exist in SU(N) gauge theory on the spaces R^2\times S^2 and R^1\times S^1\times S^2 with Minkowski signature (-+++). In the temporal gauge they are solutions of pure Yang-Mills theory on T^1\times S^2, where T^1 is R^1 or S^1. Namely, imposing SO(3)-invariance and some reality conditions, we consistently reduce the Yang-Mills model on the above spaces to a non-Abelian analog of the ϕ^4 kink model whose static solutions give SU(N) monopole (-antimonopole) configurations on the space R^{1,1}\times S^2 via the above-mentioned correspondence. These solutions can also be considered as instanton configurations of Yang-Mills theory in 2+1 dimensions. The kink model on R^1\times S^1 admits also periodic sphaleron-type solutions describing chains of n kink-antikink pairs spaced around the circle S^1 with arbitrary n>0. They correspond to chains of n static monopole-antimonopole pairs on the space R^1\times S^1\times S^2 which can also be interpreted as instanton configurations in 2+1 dimensional pure Yang-Mills theory at finite temperature (thermal time circle). We also describe similar solutions in Euclidean SU(N) gauge theory on S^1\times S^3 interpreted as chains of n instanton-antiinstanton pairs.
description: 16 pages; v2: subsection on topological charges added, title expanded, some coefficients corrected, version to appear in PRD
Chiral symmetry breaking as open string tachyon condensation
Creators: name: Casero, Roberto
name: Kiritsis, Elias
name: Paredes, Angel
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We consider a general framework to study holographically the dynamics of fundamental quarks in a confining gauge theory. Flavors are introduced by placing a set of (coincident) branes and antibranes on a background dual to a confining color theory. The spectrum contains an open string tachyon and its condensation describes the U(N_f)_L x U(N_f)_R -> U(N_f)_V symmetry breaking. By studying worldvolume gauge transformations of the flavor brane action, we obtain the QCD global anomalies and an IR condition that allows to fix the quark condensate in terms of the quark mass. We find the expected N_f^2 Goldstone bosons (for m_q=0), the Gell-Mann-Oakes-Renner relation (for m_q small) and the η' mass. Remarkably, the linear confinement behavior for the masses of highly excited spin-1 mesons, m_n^2 ~ n is naturally reproduced.
description: 30 pages + 5 appendices, 2 figures
Numerical simulation of hot accretion flows (IV): effects of black hole spin and magnetic field strength on the wind and the comparison between wind and jet properties
Creators: name: Yang, Hai
name: Yuan, Feng
name: Yuan, Ye-fei
name: White, Christopher J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: This is the fourth paper of our series of works studying winds from hot accretion flows around black holes. In the first two papers, we have shown the existence of strong winds in hot accretion flows using hydrodynamical and magnetohydrodynamical (MHD) simulations. In the third paper, by using three dimensional general relativity MHD numerical simulation data of hot accretion flows and adopting a "virtual particle trajectory" data analysis approach, we have calculated the properties of wind, such as its mass flux and velocity. However, that paper focuses only on a non-spinning black hole and SANE (standard and normal accretion). In the present paper, we extend the third paper by including cases of a rapidly rotating black hole and MAD (magnetically arrested disk). We focus on investigating the effect of spin and magnetic field on the properties of wind and jet. It is found that a larger spin and stronger magnetic field usually enhance the wind and jet. The formulae describing the mass flux, poloidal velocity, and fluxes of momentum, kinetic energy, and total energy of wind and jet are presented. One interesting finding, among others, is that even in the case of very rapidly spinning black hole where the jet is supposed to be the strongest, the momentum flux of jet is smaller than that of wind, while the total energy flux of jet is larger than that of wind by at most a factor of 10. This result suggests that wind potentially plays a more important role than jet at least for some problems in active galactic nuclei feedback.
description: 21 pages, 16 figures, accepted for publication in ApJ
Relatos de Cuiabá e kayabi, história de uma caçada
Creators: name: Mỹky, Janaxi
name: Mỹky, Xinuxi
name: Rondon Amarante, Elizabeth
name: Bardagil Mas, Bernat
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2024
Subjects: subject: irn

description: 1 arquivo WAV. Sumário na fita: "Janãxi conta sobre Cuiabá e kayabi na língua e em portuguê"; "Xinũxi conta na língua uma caçada de porco e caitetu." Lugar: "Aldeia mỹky do Escondido." Digitalizado pelo Berkeley Language Center.
Winner-relaxing and winner-enhancing Kohonen maps: Maximal mutual information from enhancing the winner
Creators: name: Claussen, Jens Christian
Publisher: name: arXiv
Year: 2006
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: FOS: Physical sciences

description: The magnification behaviour of a generalized family of self-organizing feature maps, the Winner Relaxing and Winner Enhancing Kohonen algorithms is analyzed by the magnification law in the one-dimensional case, which can be obtained analytically. The Winner-Enhancing case allows to acheive a magnification exponent of one and therefore provides optimal mapping in the sense of information theory. A numerical verification of the magnification law is included, and the ordering behaviour is analyzed. Compared to the original Self-Organizing Map and some other approaches, the generalized Winner Enforcing Algorithm requires minimal extra computations per learning step and is conveniently easy to implement.
description: 6 pages, 5 figures. For an extended version refer to cond-mat/0208414 (Neural Computation 17, 996-1009)
Σχεδιασμός και Ανάπτυξη Πληροφοριακού Συστήματος Ενημέρωσης για την Προσβασιμότητα και Προσπελασιμότητα Δασικών Περιοχών
Creators: name: Λιοτήρης, Χρήστος Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Πληροφοριακό Σύστημα
Προσβασιμότητα
Δασικό Οδικό Δίκτυο
Information System
Accessibility
Forest Road Network

description: Αντικείμενο της παρούσας εργασίας είναι ο σχεδιασμός και η ανάπτυξη ενός πληροφοριακού συστήματος που βοηθά στην ενημέρωση της προσβασιμότητας και προσπελασιμότητας του δασικού οδικού δικτύου. Το 25% της συνολικής έκτασης της Ελλάδας αποτελείται από δάση, καθιστώντας την τέταρτη σε δασικό πλούτο ανάμεσα στις χώρες της Ευρώπης. Η πολύπλοκη δομή του δασικού οδικού δικτύου καθιστά αναγκαία τη χρήση τεχνολογιών πλοήγησης για τη διευκόλυνση της μετακίνησης των πολιτών και των υπαλλήλων που εργάζονται σε αυτό. Με γνώμονα την επίλυση του παραπάνω προβλήματος δημιουργήθηκε το σύστημα της συγκεκριμένης εργασίας που αποτελείται από τη χρήση μίας ιστοσελίδας η οποία σχεδιάστηκε με HTML5 και μορφοποιήθηκε με CSS3. Η σελίδα αυτή διαχειρίζεται μέσω ενός τοπικού server (WAMPServer) στον υπολογιστή μας και αποθηκεύει τα απαραίτητα δεδομένα στη βάση δεδομένων MySQL. Οι χρήστες λαμβάνουν τις απαραίτητες πληροφορίες μέσω μηνυμάτων στο smartphone τους στο οποίο έχει εγκατασταθεί μία εφαρμογή Android. Η εφαρμογή αυτή χρησιμοποιεί την εφαρμογή Google Maps στην οποία λαμβάνουν τη διαδρομή που πρέπει να ακολουθήσουν. Η προώθηση των πληροφοριών στους χρήστες γίνεται μέσω του Firebase Cloud Messaging. Τέλος, πρέπει να υπογραμμιστεί ότι για την υλοποίηση του συγκεκριμένου συστήματος χρησιμοποιήθηκαν ελεύθερα λογισμικά με αποτέλεσμα το κόστος σχεδιασμού του να είναι μηδενικό.
description: This master thesis is about designing and development of an information system which enhances the accessibility of the forest road network. 25% of the total land area of Greece consists of forests, ranking it fourth in forestry wealth among the countries of Europe. The complex structure of the forest road network makes it necessary to use navigation technologies to facilitate the movement of citizens and employees working in it. In this thesis we propose a solution for this problem, which consists of a web site that stores necessary data in a database. It uses HTML5 and CSS3 for the frontend and WAMP Server with MySQL as backend. Users receive the necessary information via messages on their Android smartphone using an application. This application uses the Google Maps app to receive the route that should be followed. Forwarding information to users is done through Firebase Cloud Messaging. Finally, it should be highlighted that free and open software was used to implement this system.