cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Αναλυτική και αριθμητική διερεύνηση συστήματος αρνητικής δυσκαμψίας
Creators: name: Χατζηκωνσταντίνου, Νικολέτα Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Σύστημα αρνητικής δυσκαμψίας
Σεισμική μόνωση
Μη-γραμμική ανάλυση
Negative stiffness system
Seismic isolation
Nonlinear analysis

description: Σκοπός της διατριβής ήταν η αναλυτική και αριθμητική διερεύνηση ενός συστήματος αρνητικής δυσκαμψίας. Αρχικά διασαφηνίζεται η έννοια της αρνητικής δυσκαμψίας και η έννοια των μηχανισμών αρνητικής δυσκαμψίας, καθώς και ο τρόπος με τον οποίο τα συστήματα αυτά είναι δυνατόν να χρησιμοποιηθούν ως στοιχεία απόσβεσης της σεισμικής ενέργειας στις κατασκευές. Επίσης παρουσιάζεται και αναλύεται η λειτουργία διάφορων συστημάτων αρνητικής δυσκαμψίας που έχουν προταθεί ως συστήματα μόνωσης κατασκευών. Δίνεται ιδιαίτερη βαρύτητα στο μοντέλο των κυλιόμενων συνδεδεμένων ράβδων του Platus (1991), το οποίο περιγράφεται και αναλύεται διεξοδικά. Στη συνέχεια περιγράφεται η προσομοίωση του συστήματος αρνητικής δυσκαμψίας του Platus (1991) με χρήση του λογισμικού SAP2000. Ακόμη, έγινε αξιολόγηση των αποτελεσμάτων που προέκυψαν από πολλαπλά προσομοιώματα. Επιπλέον, διατυπώθηκε η μαθηματική εξίσωση της απόκρισης ενός συστήματος με αρνητική δυσκαμψία, και ερμηνεύθηκε η συμπεριφορά ενός τέτοιου μονοβάθμιου συστήματος το οποίο υπόκειται σε ημιτονοειδή διέγερση. Γίνεται μία προσπάθεια απόδοσης της απόκρισης του εξεταζόμενου συστήματος αρνητικής δυσκαμψίας συναρτήσει του χρόνου, μέσω μιας πρότασης που τροποποιεί την επαναληπτική μέθοδο Newmark, πραγματοποιώντας παράλληλα σύγκριση των τιμών που προκύπτουν για τα προαναφερθέντα μεγέθη με αυτά που προκύπτουν για το αντίστοιχο σύστημα που παρουσιάζει ελαστοπλαστική συμπεριφορά
description: The purpose of this thesis was the analytical and numerical investigation of a system of negative stiffness. The concept of negative stiffness and the concept of negative stiffness mechanisms are first clarified, as well as how these systems can be used as quenching elements for seismic energy in constructions. The function of various negative stiffness systems proposed as seismic isolation systems is also presented and analyzed. Particular attention is paid to the model of Platus (1991), which is described and analyzed in detail. Furthermore, the simulation of the Platus (1991) negative stiffness system using SAP2000 software is described. In addition, the results of multiple simulations were evaluated and the mathematical equation of the response of a system with negative stiffness was formulated. The behavior of such a single-stage system subject to sine wave excitation was interpreted. An attempt is made to derive the response of the tested negative stiffness system over time, by means of a proposal modifying the Newmark iterative method, while comparing the values obtained for the above-mentioned sizes with those obtained for the corresponding elastoplastic behavior system
Source-dependent properties of two slow solar wind states
Creators: name: Griton, Léa
name: Rouillard, Alexis P.
name: Poirier, Nicolas
name: Issautier, Karine
name: Moncuquet, Michel
name: Pinto, Rui
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Plasma Physics (physics.plasm-ph)
subject: Space Physics (physics.space-ph)
subject: FOS: Physical sciences

description: Two states of the slow solar wind are identified from in-situ measurements by Parker Solar Probe (PSP) inside 50 solar radii from the Sun. At such distances the wind measured at PSP has not yet undergone significant transformation related to the expansion and propagation of the wind. We focus in this study on the properties of the quiet solar wind with no magnetic switchbacks. The two states differ by their plasma beta, flux and magnetic pressure. PSP's magnetic connectivity established with Potential Field Source Surface (PFSS) reconstructions, tested against extreme ultraviolet (EUV) and white-light imaging, reveals the two states correspond to a transition from a streamer to an equatorial coronal hole. The expansion factors of magnetic field lines in the streamer are 20 times greater than those rooted near the center of the coronal hole. The very different expansion rates of the magnetic field result in different magnetic pressures measured by PSP in the two plasma states. Solar wind simulations run along these differing flux tubes reproduce the slower and denser wind measured in the streamer and the more tenuous wind measured in the coronal hole. Plasma heating is more intense at the base of the streamer field lines rooted near the boundary of the equatorial hole than those rooted closer to the center of the hole. This results in a higher wind flux driven inside the streamer than deeper inside the equatorial hole.
description: Accepted for publication in the Astrophysical Journal on Feb 4, 2021
Phase diagram of frustrated mixed-spin ladders in the strong-coupling limit
Creators: name: Chen, Shu
name: Wang, Li
name: Wang, Yupeng
Publisher: name: arXiv
Year: 2006
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We study the ground-state properties of frustrated Heisenberg ferrimagnetic ladders with antiferromagnetic exchange interactions and two types of alternating sublattice spins. In the limit of strong rung couplings, we show that the mixed spin-1/2 and spin-1 ladders can be systematically mapped onto a spin-1/2 Heisenberg model with additional next-nearest-neighbor exchanges. The system is either in a ferrimagnetic state or in a critical spin-liquid state depending on the competition between the spin exchanges along the legs and the diagonal exchanges.
description: 6 pages, 2 figure
Markovian Monte Carlo solutions of the one-loop CCFM equations
Creators: name: Golec-Biernat, K.
name: Jadach, S.
name: Placzek, W.
name: Stephens, P.
name: Skrzypek, M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: A systematic extension of the Monte Carlo (MC) algorithm, that solves the DGLAP equation, into the so-called the one-loop CCFM evolution is presented. Modifications are related to a z-dependent coupling constant; transverse momentum dependence is added to the x-dependence of the parton distributions. The presented Markovian algorithm for one-loop CCFM evolution is the first step in extending it to other more sophisticated schemes beyond DGLAP. In particular, implementing the complete CCFM will be the next step. The presently implemented one-loop CCFM option will be a useful tool in testing the forthcoming MC solutions. Numerical results of the new MC are confronted with other non-MC numerical solutions. The agreement within the MC statistical error of ~0.1% is found. Also, numerical results for kT-dependent structure functions are presented.
Η Καλαβρία μέσα από το έργο του Κορράντο Αλβάρο «Gente in Aspromonte». Σχολιασμένη μετάφραση του διηγήματος Coronata και της εισαγωγής της ομώνυμης νουβέλας
Creators: name: Τσίτσου, Μαρία Θωμά
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Κορράντο Αλβάρο
Σχολιασμένη Μετάφραση
Καλαβρία
Corrado Alvaro
Commentary translation
Calabria

description: Σκοπός της διπλωματικής εργασίας ήταν η παρουσίαση δύο αποσπασμάτων από το έργο του Κορράντο Αλβάρο «Gente in Aspromonte», του διηγήματος Coronata και της εισαγωγής της ομότιτλης νουβέλας. Αρχικά τα κείμενα αποδόθηκαν από την ιταλική γλώσσα στην ελληνική. Ακολούθως καταγράφηκαν και σχολιάστηκαν οι επιλογές στις δυσκολίες που παρουσιάστηκαν κατά τη μεταφραστική διαδικασία. Στη συνέχεια παρατέθηκαν βιογραφικά και εργογραφικά στοιχεία του συγγραφέα. Επιπλέον έγινε προσπάθεια προσέγγισης του ιστορικού και κοινωνικού πλαισίου του γενέθλιου τόπου του, της Καλαβρίας και της εποχής του
description: The aim of this master’s thesis was the presentation of two extracts by Corrado Alvaro’ s «Gente in Aspromonte», that is of his short story Coronata and the introduction of the titular novella. Initially the texts were transferred from the Italian language to Greek. Afterwards, they were listed and commented the choices made during translation process. Then they were cited the writer’s biography and his works. Furthermore, it was made an attempt to approach the historical and social frame of the writer’s birthplace, Calabria and his era
Electric and magnetic characterization of NbSe2 single crystals: anisotropic superconducting fluctuations above Tc
Creators: name: Soto, F.
name: Berger, H.
name: Cabo, L.
name: Carballeira, C.
name: Mosqueira, J.
name: Pavuna, D.
name: Toimil, P.
name: Vidal, F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: Electric and magnetic characterization of NbSe2 single crystals is first presented in detail. Then, some preliminary measurements of the fluctuation-diamagnetism (FD) above the transition temperature Tc are presented. The moderate uniaxial anisotropy of this compound allowed us to observe the fluctuation effects for magnetic fields H applied in the two main crystallographic orientations. The superconducting parameters resulting from the characterization suggest that it is possible to do a reliable analysis of the FD in terms of the Ginzburg-Landau (GL) theory.
description: 2 pages, 3 figures. To appear in Physica C (proceedings of the M2S-HTSC VIII Conference)
The music program at Trinity Western University : curriculum perspectives, past, present and future
Creators: name: Rushton, David William
Publisher: name: University of British Columbia
Year: 2009

description: Trinity Western University is a relatively small, private Christian university located in Langley, British Columbia. The institution opened in 1962 as Trinity Junior College with a student body of seventeen, and until 1977 offered a two-year university transfer program. Today, Trinity Western University serves over 1200 full-time undergraduate students who pursue subject majors in twenty-five discipline areas, each of which leads to a baccalaureate degree. In 1983, the first B.A. degrees in music were granted. The purpose of this study was two-fold: (1) to evaluate the quality and excellence of the music program at Trinity Western University and (2) to determine what qualities and attributes should characterize a music program for the 1990s and beyond within the context of a private, relatively small Christian liberal arts university in Canada. The ideals and philosophy of the comprehensive musicianship movement as well as a College Music Society Study Group's call for a curriculum characterized by a comprehensive musical perspective served as the ideological basis for the study. Evaluation models of Daniel Stufflebeam, Robert Stake, and Elliot Eisner influenced the methodology. The program as it is presently constituted was evaluated according to the standards and guidelines for liberal arts degrees in music as prescribed by the National Association of Schools of Music. The primary data for the study were derived from questionnaires administered to six stakeholder-based respondent groups: entering first-year music students, students mid-way through the program, music graduates from 1983-92, faculty, administrators, and members of the board of governors. Twenty-four aspects of the curriculum were evaluated. Responses were analyzed using ANOVA procedures and one or more of seven independent variables. Additionally, responses by first-year students and graduates to six personal qualities requisite to the development of comprehensive musicianship were analyzed. A seventy-five item survey of characteristics of a music program for the 1990s and beyond was administered to all participants. Responses were analyzed using ANOVA procedures and five independent variables, ranked as to relative importance, and placed in one of eight categories. The study concludes with six specific curricular recommendations, and offers five suggestions for future study and research.
Song, flute music, stories
Creators: name: Sebastián, Juan
name: Lewington, Anna
name: , Gustavo
name: , Isaac
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022
Subjects: subject: pib

description: Corresponds to portions of original Tape 1, Side A (not donated). Contents are: 1) song sung in Yine by Isaac; 2) huayno perfomed by Gustavo on the flute (Sp. quena); 3) three tunes played by Gustavo on the quena; 4) traditional Yine story told in Spanish by Juan Sebastián about two girls and Boa Constrictor; 5) another story told in Spanish by Juan Sebastián about two tayras (Sp. manco). In (4), one of the two girls becomes involved with a man who has transformed himself from a boa constrictor. He predicts a flood and gives her a genipapo (Sp. huito) seed to plant so that the girls can climb up it to escape from the rising water. The story also involves them stealing yams (Sp. sachapapa) and other food and being pursued.
Amplitude analysis and branching fraction measurement of $D_s^+ \to K^-K^+π^+π^0$
Creators: name: BESIII Collaboration
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The first amplitude analysis of the decay $D_s^+\to K^-K^+π^+π^0$ is presented using the data samples, corresponding to an integrated luminosity of 6.32 fb$^{-1}$, collected with the BESIII detector at $e^+e^-$ center-of-mass energies between 4.178 and 4.226 GeV. More than 3000 events selected with a purity of 97.5\% are used to perform the amplitude analysis, and nine components are found necessary to describe the data. Relative fractions and phases of the intermediate decays are determined. With the detection efficiency estimated by the results of the amplitude analysis, the branching fraction of $D_s^+\to K^-K^+π^+π^0$ decay is measured to be $(5.42\pm0.10_{\rm stat.}\pm0.17_{\rm syst.})\%$.
description: 20 pages, 24 figures
Understanding block rotation of strike-slip fault zones: Paleomagnetic and structural approach
Creators: name: Hernandez Moreno, Catalina <1981>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: GEO/10 Geofisica della terra solida

description: This thesis is focused on the paleomagnetic rotation pattern inside the deforming zone of strike-slip faults, and the kinematics and geodynamics describing it. 
The paleomagnetic investigation carried out along both the LOFZ and the fore-arc sliver (38º-42ºS, southern Chile) revealed an asymmetric rotation pattern. East of the LOFZ and adjacent to it, rotations are up to 170° clockwise (CW) and fade out ~10 km east of fault. West of the LOFZ at 42ºS (Chiloé Island) and around 39°S (Villarrica domain) systematic CCW rotations have been observed, while at 40°-41°S (Ranco-Osorno domain) and adjacent to the LOFZ CW rotations reach up to 136° before evolving to CCW rotations at ~30 km from the fault. These data suggest a directed relation with subduction interface plate coupling. Zones of high coupling yield to a wide deforming zone (~30 km) west of the LOFZ characterized by CW rotations. Low coupling implies a weak LOFZ and a fore-arc dominated by CCW rotations related to NW-sinistral fault kinematics. 
The rotation pattern is consistent with a quasi-continuous crust kinematics. However, it seems unlikely that the lower crust flux can control block rotation in the upper crust, considering the cold and thick fore-arc crust. I suggest that rotations are consequence of forces applied directly on both the block edges and along the main fault, within the upper crust.
Farther south, at the Austral Andes (54°S) I measured the anisotropy of magnetic susceptibility (AMS) of 22 Upper Cretaceous to Upper Eocene sites from the Magallanes fold-thrust belt internal domains. The data document continuous compression from the Early Cretaceous until the Late Oligocene. AMS data also show that the tectonic inversion of Jurassic extensional faults during the Late Cretaceous compressive phase may have controlled the Cenozoic kinematic evolution of the Magallanes fold-thrust belt, yielding slip partitioning.
Καταπόνηση πολυωρόφου πλαισιακού συστήματος από οπλισμένο σκυρόδεμα, λόγω μεγάλων κατακόρυφων μετακινήσεων υποστυλώματος στο ισόγειο
Creators: name: Χατζάκης, Νικόλαος Μύρωνα
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: Πλασιακό κτίριο από σκυρόδεμα
Κανονιστικές διατάξεις
Αριθμητικές προσομοιώσεις
Reinforced Concrete Frame Building
Codes regulations
Numerical simulations

description: Η παρούσα μεταπτυχιακή εργασία ασχολήθηκε με τις μεγάλες κατακόρυφες μετακινήσεις κτιρίου από οπλισμένο σκυρόδεμα σε υποστύλωμα του ισογείου. Αρχικά, μελετώντας τους κανονισμούς που υπάρχουν επί του θέματος, αλλά και μια σειρά επιστημονικών δημοσιεύσεων έγινε μια συλλογή πληροφοριών, οι οποίες αναπτύχθηκαν συνοπτικά στο σώμα του κειμένου, προκειμένου να υπάρχει εποπτεία για την δουλειά που έχει γίνει παγκοσμίως. Εν συνεχεία, έχοντας αντλήσει τα κατάλληλα δεδομένα και αναλύσει τα σημεία κλειδιά για το πρόβλημα ,έγινε η χρήση προηγμένων αριθμητικών εργαλείων, με δυνατότητα προσέγγισης φαινομένων με μεγάλες μετακινήσεις και φαινόμενα δεύτερης τάξης για να προσομοιωθεί αριθμητικά το ίδιο πρόβλημα. Μέσα από την κατάλληλη χρήση του λογισμικού έγινε δυνατή η προσέγγιση του πολύπλοκου αυτού φαινομένου. Από αυτή την εφαρμογή για το παράδειγμα που επιλέχθηκε , έγινε η παρουσίαση για τρία διαφορετικά σενάρια και αναλύθηκε πως ,με τη χρήση των κανονισμών, προσεγγίζεται η καταπόνηση των φερόντων στοιχείων τόσο με ελαστική όσο και με ανελαστική ανάλυση.
description: The present postgraduate thesis dealt with the large vertical displacement of reinforced concrete building at its ground floor. Initially, by studying the existing regulations on the subject, as well as a number of scientific publications, a collection of information was developed, which was summarized in the body of the text, in order to monitor the research done worldwide. Subsequently, having extracted the appropriate data and analyzing the key points for the problem, advanced numerical tools were used, capable of approximating large-displacements and second-order phenomena to numerically simulate the same problem. Proper use of the software made it possible to approach this complex phenomenon. From this application for the example chosen, three different scenarios were presented and analyzed using the rules to approximate the stresses of the bearing elements by both elastic and inelastic analysis.
Inversion of low frequency seismo-volcanic events
Creators: name: Nocerino, Luciano <1984>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: GEO/10 Geofisica della terra solida

description: The inversion of seismo-volcanic events is performed to retrieve the source geometry and to determine volumetric budgets of the source. Such observations have shown to
be an important tool for the seismological monitoring of volcanoes.
We developed a novel technique for the non-linear constrained inversion of low frequency seismo-volcanic events. Unconstrained linear inversion methods work well
when a dense network of broadband seismometers is available. We propose a new constrained inversion technique, which has shown to be efficient also in a reduced network configuration and a low signal-noise ratio.
The waveform inversion is performed in the frequency domain, constraining the source mechanism during the event to vary only in its magnitude. The eigenvectors orientation and the eigenvalue ratio are kept constant. This significantly reduces the number of parameters to invert, making the procedure more stable. The method has been tested over a synthetic dataset, reproducing realistic very-long-period (VLP) signals of Stromboli volcano.
The information obtained by performing the synthetic tests is used to assess the reliability of the results obtained on a VLP dataset recorded on Stromboli volcano and on a low frequency events recorded at Vesuvius volcano.
S-Matrix Equivalence Theorem Evasion and Dimensional Regularisation with the Canonical MHV Lagrangian
Creators: name: Ettle, James H.
name: Fu, Chih-Hao
name: Fudger, Jonathan P.
name: Mansfield, Paul R. W.
name: Morris, Tim R.
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 demonstrate that the canonical change of variables that yields the MHV lagrangian, also provides contributions to scattering amplitudes that evade the equivalence theorem. This `ET evasion' in particular provides the tree-level (-++) amplitude, which is non-vanishing off shell, or on shell with complex momenta or in (2,2) signature, and is missing from the MHV (aka CSW) rules. At one loop there are ET-evading diagrammatic contributions to the amplitudes with all positive helicities. We supply the necessary regularisation in order to define these contributions (and quantum MHV methods in general) by starting from the light-cone Yang-Mills lagrangian in D dimensions and making a canonical change of variables for all D-2 transverse degrees of freedom of the gauge field. In this way, we obtain dimensionally regularised three- and four-point MHV amplitudes. Returning to the one-loop (++++) amplitude, we demonstrate that its quadruple cut coincides with the known result, and show how the original light-cone Yang-Mills contributions can in fact be algebraically recovered from the ET-evading contributions. We conclude that the canonical MHV lagrangian, supplemented with the extra terms brought to correlation functions by the non-linear field transformation, provide contributions which are just a rearrangement of those from light-cone Yang-Mills and thus coincide with them both on and off shell.
description: 32 pages, 9 figures. v2: corrects typos and Fig. 8; adds further citations and acknowledgements
Oblique ionograms automatic scaling and eikonal based ray tracing
Creators: name: Ippolito, Alessandro <1977>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: GEO/10 Geofisica della terra solida

description: A method for automatic scaling of oblique ionograms has been introduced. This method also provides a rejection procedure for ionograms that are considered to lack sufficient information, depicting a very good success rate. Observing the Kp index of each autoscaled ionogram, can be noticed that the behavior of the autoscaling program does not depend on geomagnetic conditions.
The comparison between the values of the MUF provided by the presented software and those obtained by an experienced operator indicate that the procedure developed for detecting the nose of oblique ionogram traces is sufficiently efficient and becomes much more efficient as the quality of the ionograms improves. These results demonstrate the program allows the real-time evaluation of MUF values associated with a particular radio link through an oblique radio sounding. The automatic recognition of a part of the trace allows determine for certain frequencies, the time taken by the radio wave to travel the path between the transmitter and receiver. The reconstruction of the ionogram traces, suggests the possibility of estimating the electron density between the transmitter and the receiver, from an oblique ionogram. The showed results have been obtained with a ray-tracing procedure based on the integration of the eikonal equation and using an analytical ionospheric model with free parameters. This indicates the possibility of applying an adaptive model and a ray-tracing algorithm to estimate the electron density in the ionosphere between the transmitter and the receiver An additional study has been conducted on a high quality ionospheric soundings data set and another algorithm has been designed for the conversion of an oblique ionogram into a vertical one, using Martyn's theorem. This allows a further analysis of oblique soundings, throw the use of the INGV Autoscala program for the automatic scaling of vertical ionograms.
Squalls and Saws: The Influence of Derecho and Management Disturbances on Forest Arthropods
Creators: name: Wilson, Jillian E
Publisher: name: Purdue University Graduate School
Year: 2025
Subjects: classificationCode: 310302
subject: Community ecology (excl. invasive species ecology)
classificationCode: 300707
subject: Forestry management and environment
classificationCode: 300702
subject: Forest biodiversity
classificationCode: 310913
subject: Invertebrate biology

description: Disturbance events and subsequent management practices significantly shape the ecological legacies of affected sites. This study evaluated the impacts of a 2022 derecho and the forest management that followed on forest structure and arthropod diversity within Allen County, Indiana, by comparing effected forests at Fogwell Forest Nature Preserve and Fox Island County Park to control forests at Blue Cast Springs and Hammer Wald Nature Preserves. Arthropod communities were sampled using pitfall and flight-intercept traps, while forest structure was assessed through detailed surveys of understory, midstory, and overstory vegetation. Results indicated a decrease in overall arthropod diversity across all sites since 2016, variably attributed to forest maturation, climatic variability, and the 2022 disturbance, with some specific taxa being targeted in this decrease such as Formicidae and Curculionidae. Fogwell exhibited a significant decline in arthropod diversity, likely linked to the derecho, while Fox Island’s diversity aligned more closely with undisturbed control sites. Notable midstory reductions were found across sites over time especially at Fox Island as a result of the harvest and storm impacts. Meanwhile, overstory diversity varied between properties. Regression modeling revealed that forest management practices at Fox Island may have mitigated the disturbance's effects, aiding arthropod recovery. All in all, these findings highlight the importance of forest management strategies in influencing biodiversity and ecological recovery post-disturbance.
Entanglement Spheres and a UV-IR connection in Effective Field Theories
Creators: name: Klco, Natalie
name: Savage, Martin J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We show that long-distance quantum correlations probe short-distance physics. Two disjoint regions of the latticized, massless scalar field vacuum are numerically demonstrated to become separable at distances beyond the negativity sphere, which extends to infinity in the continuum limit. The size of this quantum coherent volume is determined by the highest momentum mode supported in the identical regions, each of diameter $d$. More generally, effective field theories (EFTs), describing a system up to a given momentum scale $Λ$, are expected to share this feature -- entanglement between regions of the vacuum depends upon the UV-completion beyond a separation proportional to $Λ$. Through calculations extended to three-dimensions, the magnitude of the negativity at which entanglement becomes sensitive to UV physics in an EFT (lattice or otherwise) is conjectured to scale as $\sim e^{-Λd}$, independent of the number of spatial dimensions. It is concluded that two-region vacuum entanglement at increasing separations depends upon the structure of the theory at increasing momentum scales. This phenomenon may be manifest in perturbative QCD processes.
description: 9 pages, 3 figures, 4 appendices (4 figures and 2 tables)
Automatic Identification of Document Translations in Large Multilingual Document Collections
Creators: name: Pouliquen, Bruno
name: Steinberger, Ralf
name: Ignat, Camelia
Publisher: name: arXiv
Year: 2006
Subjects: subject: Computation and Language (cs.CL)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences
subject: H.3.1; H.3.3; H.3.4; H.3.6

description: Texts and their translations are a rich linguistic resource that can be used to train and test statistics-based Machine Translation systems and many other applications. In this paper, we present a working system that can identify translations and other very similar documents among a large number of candidates, by representing the document contents with a vector of thesaurus terms from a multilingual thesaurus, and by then measuring the semantic similarity between the vectors. Tests on different text types have shown that the system can detect translations with over 96% precision in a large search space of 820 documents or more. The system was tuned to ignore language-specific similarities and to give similar documents in a second language the same similarity score as equivalent documents in the same language. The application can also be used to detect cross-lingual document plagiarism.
description: This technology is used daily to link related news items across languages in the multilingual news analysis system NewsExplorer, which is freely accessible at http://press.jrc.it/NewsExplorer . 8 pages
A Hot Channel
Creators: name: Koch, Tobias
name: Lapidoth, Amos
name: Sotiriadis, Paul P.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences
subject: H.1.1

description: This paper studies on-chip communication with non-ideal heat sinks. A channel model is proposed where the variance of the additive noise depends on the weighted sum of the past channel input powers. It is shown that, depending on the weights, the capacity can be either bounded or unbounded in the input power. A necessary condition and a sufficient condition for the capacity to be bounded are presented.
description: to be presented at 2007 IEEE Information Theory Workshop (ITW), replaced with version that will appear in the proceedings
Notes on the Area Theorem
Creators: name: Park, Mu-in
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Hawking's area theorem can be understood from a quasi-stationary process in which a black hole accretes $positive$ energy matter, ``independent of the details of the gravity action''. I use this process to study the dynamics of the ``inner'' as well as the outer horizons for various black holes which include the recently discovered exotic black holes and three-dimensional black holes in higher derivative gravities as well as the usual BTZ black hole and the Kerr black hole in four dimensions. I find that the area for the inner horizon ``can decrease'', rather than increase, with the quasi-stationary process. However, I find that the area for the outer horizon ``never decrease'' such as the usual area theorem still works in our examples, though this is quite non-trivial in general. There exist the instability of the inner horizons and the connected effects of ``mass inflation'' but, according to more detailed analysis, it seems that the instability is not important in my analysis. I also find a ``generalized'' area theorem by combining those of the outer and inner horizons.
description: Minor changes in the section organization; Added footnotes and references; Accepted in Class. Quant. Grav
Manifold Optimization for High Accuracy Spatial Location Estimation Using Ultrasound Waves
Creators: name: AlSharif, Mohammed H.
name: Douik, Ahmed
name: Ahmed, Mohanad
name: Al-Naffouri, Tareq Y.
name: Hassibi, Babak
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper reports the design of a high-accuracy spatial location estimation method using ultrasound waves by exploiting the fixed geometry of the transmitters. Assuming an isosceles triangle antenna configuration, where three antennas are placed as the vertices of an isosceles triangle, the spatial location problem can be formulated as a non-convex optimization problem whose interior is shown to admit a Riemannian manifold structure. Our investigation of the geometry of the newly introduced manifold (i.e., the manifold of all isosceles triangles in R3) enables the design of highly efficient optimization algorithms. Simulations are presented to compare the performance of the proposed approach with popular methods from the literature. The results suggest that the proposed Riemannian-based methods outperform the state-of-the-art methods. Furthermore, the proposed Riemannian methods require much less computation time compared to popular generic non-convex approaches.
Study properties of Cr2O3 doped in glasses prepared from sugar cane ash
Creators: name: Nattapon Srisittipokakun
Publisher: name: Nakhon Pathom Rajabhat University
Year: 2019
Subjects: sugar cane ash, physical properties, optical properties, Cr2O3, Glasses

description: Journal of Thai Interdisciplinary Research, 14, 3, 16
The multiplicity of exoplanet host stars - Spectroscopic confirmation of the companions GJ3021B and HD27442B, one new planet host triple-star system, and global statistics
Creators: name: Mugrauer, M.
name: Neuhaeuser, R.
name: Mazeh, T.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present new results from our ongoing multiplicity study of exoplanet host stars and present a list of 29 confirmed planet host multiple-star systems. Furthermore, we discuss the properties of these stellar systems and compare the properties of exoplanets detected in these systems with those of planets orbiting single stars.
description: A&A in press, 18 pages, 19 figures
Towards the 3D attenuation imaging of active volcanoes: methods and tests on real and simulated data
Creators: name: Serlenga, Vincenzo <1986>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2015
Subjects: GEO/10 Geofisica della terra solida

description: The purpose of my PhD thesis has been to face the issue of retrieving a three dimensional attenuation model in volcanic areas. To this purpose, I first elaborated a robust strategy for the analysis of seismic data. This was done by performing several synthetic tests to assess the applicability of spectral ratio method to our purposes. The results of  the tests allowed us to conclude that: 1) spectral ratio method gives reliable differential attenuation (dt*) measurements in smooth velocity models; 2) short signal time window has to be chosen to perform spectral analysis; 3) the frequency range over which to compute spectral ratios greatly affects dt* measurements. Furthermore, a refined approach for the application of spectral ratio method has been developed and tested. Through this procedure, the effects caused by heterogeneities of propagation medium on the seismic signals may be removed. The tested data analysis technique was applied to the real active seismic SERAPIS database. It provided a dataset of dt* measurements which was used to obtain a three dimensional attenuation model of the shallowest part of Campi Flegrei caldera. Then, a linearized, iterative, damped attenuation tomography technique has been tested and applied to the selected dataset. The tomography, with a resolution of 0.5 km in the horizontal directions and 0.25 km in the vertical direction, allowed to image important features in the off-shore part of Campi Flegrei caldera. High QP bodies are immersed in a high attenuation body (Qp=30). The latter is well correlated with low Vp and high Vp/Vs values and it is interpreted as a saturated marine and volcanic sediments layer. High Qp anomalies, instead, are interpreted as the effects either  of cooled lava bodies or of a CO2 reservoir. A pseudo-circular high Qp anomaly was detected and interpreted as the buried rim of NYT caldera.
Effective Action and Holography in 5D Gauge Theories
Creators: name: Panico, Giuliano
name: Wulzer, Andrea
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 apply the holographic method to 5D gauge theories on the warped interval. Our treatment includes the scalars associated with the fifth gauge field component, which appear as 4D Goldstone bosons in the holographic effective action. Applications are considered to two classes of models in which these scalars play an important role. In the Composite-Higgs (and/or Gauge-Higgs Unification) scenario, the scalars are interpreted as the Higgs field and we use the holographic recipe to compute its one-loop potential. In AdS/QCD models, the scalars are identified with the mesons and we compute holographically the Chiral Perturbation Theory Lagrangian up to p^4 order. We also discuss, using the holographic perspective, the effect of including a Chern-Simons term in the 5D gauge Lagrangian. We show that it makes a Wess-Zumino-Witten term to appear in the holographic effective action. This is immediately applied to AdS/QCD, where a Chern-Simons term is needed in order to mimic the Adler-Bardeen chiral anomaly.
description: 37 pages; v2, minor changes, one reference added; v3, minor corrections, version published in JHEP
Anna Lewington Collection of Matsigenka and Yine Sound Recordings
Creators: name: Corral, Bartolomé Ríos
name: Sebastián, Juan
name: Lewington, Anna
name: , Abel
name: , Adela
name: , Angélica
name: , Avelino
name: , Candela
name: Felícita
name: , Gustavo
name: , Isaac
name: , María
name: , Norma
name: , Paulina
name: Simón
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2022

description: Sound recordings of stories, songs, and flute and drum music in Matsigenka and Yine. The four digital files, each in their own file bundle, correspond to both sides of two original cassettes, which were digitized privately by the depositor, with portions not related to Matsigenka and Yine language and music excised.
Chemical stratification in the atmosphere of Ap star HD 133792. Regularized solution of the vertical inversion problem
Creators: name: Kochukhov, O.
name: Tsymbal, V.
name: Ryabchikova, T.
name: Makaganyk, V.
name: Bagnulo, S.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: High spectral resolution studies of cool Ap stars reveal conspicuous anomalies of the shape and strength of many absorption lines. This is a signature of large atmospheric chemical gradients produced by the selective radiative levitation and gravitational settling of chemical species. Here we present a new approach to mapping the vertical chemical structures in stellar atmospheres. We have developed a regularized chemical inversion procedure that uses all information available in high-resolution stellar spectra. The new technique for the first time allowed us to recover chemical profiles without making a priori assumptions about the shape of chemical distributions. We have derived average abundances and applied the vertical inversion procedure to the high-resolution VLT UVES spectra of the weakly magnetic, cool Ap star HD 133792. Our analysis yielded improved estimates of the atmospheric parameters of HD 133792. We show that this star has negligible vsini and the mean magnetic field modulus =1.1+/-0.1 kG. We have derived average abundances for 43 ions and obtained vertical distributions of Ca, Si, Mg, Fe, Cr, and Sr. All these elements except Mg show high overabundance in the deep layers and solar or sub-solar composition in the upper atmosphere of HD 133792. In contrast, the Mg abundance increases with height. We find that transition from the metal-enhanced to metal-depleted zones typically occurs in a rather narrow range of depths in the atmosphere of HD 133792. Based on the derived photospheric abundances, we conclude that HD 133792 belongs to the rare group of evolved cool Ap stars, which possesses very large Fe-peak enhancement, but lacks a prominent overabundance of the rare-earth elements.
description: Accepted by A&A; 12 pages, 9 figures
Aesthetics and critical pedagogy: a critique of Parsons’ stage theory of aesthetic development
Creators: name: Balomenos-Trifonas, Elefteria
Publisher: name: University of British Columbia
Year: 2008

description: The present study brings to light the limitations of Parsons' (1987) stage theory of aesthetic development by facilitating a critical examination of it through the postmodern tenets manifest within critical pedagogy. It is pointed out that the aesthetic phenomenon exists as an entity within experience which ultimately denies definitive conceptual absolutes in its description. A divergency of theoretical positions within aesthetic traditions are reviewed so as to convey the problems and limitations of an aesthetic developmental theory which restricts responses to a designated sequence of possibilities. Aesthetic experience exists as a complex network of alternatives, not easily ordered into clearly definable conceptual frameworks from which to base teaching practices. Although Parsons' theory offers a structured order which identifies sequentially appropriate objectives for the teaching of aesthetics, it is critically rendered suspect based on the philosophical predispositions of critical pedagogy. It is argued that ideological biases maintained through cultural membership serve to orient researcher and subject belief systems so as to allow for normative behaviour(s) to be presented as given and natural rather than their being considered as culturally legitimated developments. Parsons' structural theory, which offers a strictly Eurocentrically biased conceptual itinerary, is critically assessed for the moral and ethical implication it imposes on subordinate group populations. Marginalized group belief systems are implicitly denied due recognition as valid and valuable options within experience. Critical pedagogy, as it is delineated within the present study, exposes the limiting and restrictive nature of an educational agenda which offers a definitive and a closed system of developmental possibilities.
Περιβαλλοντικές πιέσεις αεροαλλεργιογόνων των κατοίκων του αστικού ιστού της ΕΠΘ
Creators: name: Στάμου, Θεοδώρα Αδαμαντίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2019
Subjects: subject: Αλλεργία
subject: Αλλεργική ρινίτιδα
subject: Γύρη
subject: Allergy
subject: FOS: Clinical medicine
subject: Allergic rhinitis
subject: Google Trends

description: Η ανθρώπινη υγεία επηρεάζεται σε μεγάλο βαθμό από τα αερομεταφερόμενα αλλεργιογόνα, γνωστά ως αεροαλλεργιογόνα, τα οποία αποτελούν μεταβλητές του βιολογικού καιρού. Μία από τις μεγαλύτερες πηγές αεροαλλεργιογόνων που βρίσκεται σε άμεση επαφή με τον άνθρωπο είναι η γύρη των φυτών. Η περίοδος γυρεοφορίας επηρεάζει σε πολύ μεγάλο βαθμό τους αλλεργικούς ασθενείς. Στην παρούσα διπλωματική διατριβή διερευνάται το κατά πόσο τα αεροαλλεργιογόνα επηρεάζουν τους κατοίκους της Ευρύτερης Περιοχής Θεσσαλονίκης. Αυτό γίνεται μέσα από την σύγκριση μετρήσεων γυρεόκοκκων που έχουν πραγματοποιηθεί από το Τμήμα Βιολογίας του Αριστοτελείου Πανεπιστημίου Θεσσαλονίκης σε συνδυασμό με τις τάσεις αναζητήσεων στην μηχανή αναζήτηση Google μέσω της πλατφόρμας Google Trends, καθώς και με δεδομένα ρινικών συμπτωμάτων ασθενών στο Γενικό Στρατιωτικό Νοσοκομείο Εκπαιδεύσεως 424
description: Human health is widely influenced by airborne allergens, also called aeroallergens, which are variables of biological weather. One of the biggest sources of aeroallergens which are in direct contact with humans, is pollen from plants. The pollen season affects allergic patients in a great way.This thesis examines the extent to which allergens affects the inhabitants of the Greater Area of Thessaloniki. This is done by comparing data from pollen measurements made by the Department of Biology of the Aristotle University of Thessaloniki in conjunction with Google searches through the Google Trends platform as well as with patients’ of General Military Hospital 424 nasal symptoms data
A local limit theorem with speed of convergence for Euclidean algorithms and diophantine costs
Creators: name: Baladi, Viviane
name: Hachemi, Aïcha
Publisher: name: arXiv
Year: 2006
Subjects: subject: Dynamical Systems (math.DS)
subject: Probability (math.PR)
subject: FOS: Mathematics

description: For large $N$, we consider the ordinary continued fraction of $x=p/q$ with $1\le p\le q\le N$, or, equivalently, Euclid's gcd algorithm for two integers $1\le p\le q\le N$, putting the uniform distribution on the set of $p$ and $q$s. We study the distribution of the total cost of execution of the algorithm for an additive cost function $c$ on the set $\mathbb{Z}_+^*$ of possible digits, asymptotically for $N\to\infty$. If $c$ is nonlattice and satisfies mild growth conditions, the local limit theorem was proved previously by the second named author. Introducing diophantine conditions on the cost, we are able to control the speed of convergence in the local limit theorem. We use previous estimates of the first author and Vallée, and we adapt to our setting bounds of Dolgopyat and Melbourne on transfer operators. Our diophantine condition is generic (with respect to Lebesgue measure). For smooth enough observables (depending on the diophantine condition) we attain the optimal speed.
description: Published in at http://dx.doi.org/10.1214/07-AIHP140 the Annales de l'Institut Henri Poincar\'e - Probabilit\'es et Statistiques (http://www.imstat.org/aihp/) by the Institute of Mathematical Statistics (http://www.imstat.org)
Geometry of obstructed equisingular families of projective hypersurfaces
Creators: name: Gourevitch, Anna
name: Gourevitch, Dmitry
Publisher: name: arXiv
Year: 2008
Subjects: subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 14F17; 14H20; 14B12; 14J70; 14D20

description: We study geometric properties of certain obstructed equisingular families of projective hypersurfaces with emphasis on smoothness, reducibility, being reduced, and having expected dimension. In the case of minimal obstructness, we give a detailed description of such families corresponding to quasihomogeneous singularities. Next we study the behavior of these properties with respect to stable equivalence of singularities. We show that under certain conditions, stabilization of singularities ensures the existence of a reduced component of expected dimension. For minimally obstructed families the whole family becomes irreducible. As an application we show that if the equisingular family of a projective hypersurface H has a reduced component of expected dimension then the deformation of H induced by the linear system |H| is complete with respect to one-parameter deformations.
description: 30 pages. v2: more detailed explanations. v3: minor corrections, version to appear in the Journal of Pure and Applied Algebra