cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Permutation and Its Partial Transpose
Creators: name: Zhang, Yong
name: Kauffman, Louis H.
name: Werner, Reinhard F.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Permutation and its partial transpose play important roles in quantum information theory. The Werner state is recognized as a rational solution of the Yang--Baxter equation, and the isotropic state with an adjustable parameter is found to form a braid representation. The set of permutation's partial transposes is an algebra called the "PPT" algebra which guides the construction of multipartite symmetric states. The virtual knot theory having permutation as a virtual crossing provides a topological language describing quantum computation having permutation as a swap gate. In this paper, permutation's partial transpose is identified with an idempotent of the Temperley--Lieb algebra. The algebra generated by permutation and its partial transpose is found to be the Brauer algebra. The linear combinations of identity, permutation and its partial transpose can form various projectors describing tangles; braid representations; virtual braid representations underlying common solutions of the braid relation and Yang--Baxter equations; and virtual Temperley--Lieb algebra which is articulated from the graphical viewpoint. They lead to our drawing a picture called the "ABPK" diagram describing knot theory in terms of its corresponding algebra, braid group and polynomial invariant. The paper also identifies nontrivial unitary braid representations with universal quantum gates, and derives a Hamiltonian to determine the evolution of a universal quantum gate, and further computes the Markov trace in terms of a universal quantum gate for a link invariant to detect linking numbers.
description: 42 pages, 22 figures, latex
Μελέτη σε βάθος του εκλογικού ανταγωνισμού στην Περιφέρεια Ηπείρου: παρατάξεις, κόμματα, πρόσωπα
Creators: name: Ντονάτι, Βαλέρια Τζιλμπέρτο
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Πολιτικό μάρκετινγκ
Περιφέρεια Ηπείρου
Πολιτικά κόμματα
Political marketing
Epirus Region
Political parties

description: Η ύπαρξη κοινωνικού, πολιτικού και οικονομικού πλουραλισμού στις σύγχρονες φιλελεύθερες αστικές δημοκρατίες, σε συνδυασμό με την ύπαρξη εκλογών μέσω των οποίων εκφράζονται οι πολιτικές επιλογές, καθιστούν ιδιαίτερα ενδιαφέρουσα τη μελέτη του εκλογικού ανταγωνισμού, στην προκειμένη περίπτωση στην Περιφέρεια Ηπείρου. Ο χώρος της τοπικής αυτοδιοίκησης, συνδυαστικά με τις μεταρρυθμίσεις και τις επιπτώσεις αυτών, η προεκλογική και μετεκλογική τακτική των υποψηφίων παρατάξεων (πολιτικό μάρκετινγκ), των προσώπων που τις απαρτίζουν, αλλά και η επιρροή των κομμάτων στην συνολική πορεία αυτών, αποτελούν το κύριο πεδίο έρευνας της παρούσας διπλωματικής εργασίας, εξαιτίας του αδιαμφισβήτητα μεγάλου ερευνητικού ενδιαφέροντος που προσφέρουν. Στην παρούσα διπλωματική εργασία θα πραγματοποιηθεί μελέτη σε βάθος του εκλογικού ανταγωνισμού στην Περιφέρεια της Ηπείρου, με αφετηρία τις Νομαρχιακές εκλογές του 2006 και στη συνέχεια τις Περιφερειακές εκλογές του 2010 και 2014. Η μελέτη θα επικεντρωθεί στις παρατάξεις, τα πρόσωπα, τις προεκλογικές εκστρατείες, τα θέματα που απασχόλησαν την κοινή γνώμη, την επιρροή των κομμάτων καθώς και στο Επιχειρησιακό Πρόγραμμα της Περιφέρειας Ηπείρου (2015-2019) και στις δυνατότητες της περιοχής.
description: The existence of social, political and economic pluralism in the modern liberal civil democracies, along with the existence of elections, by virtue of which political choices are being expressed, render the study of electoral competition particularly interesting, in this case with regards to the Epirus Region. The Local Self-Government, in combination with the reforms and their impact, the political candidates' pre- and post-electoral tactics (political marketing), the persons constituting them, as well as the parties' influence through their overall course, constitute the main field of research of this Master's Thesis, due to the undoubtedly great research interest they offer. The present Master's Thesis will undertake an in-depth study of the electoral competition in the Epirus Region, starting with the 2006 Prefectural elections and followed by the 2010 and 2014 Regional elections. This research will focus on the political factions, the persons, the pre-electoral campaigns, the public affairs, the parties influence as well as on the Operational Program of the Epirus Region (2015-2019) and the potential of the region.
title: Simulation von Dezentrierung und Verkippung in einem polypseudophaken Zwei-Linsen-System unter Verwendung von Ray-Tracing-Simulationen
Creators: name: Yildirim, Timur M.
name: Łabuz, G.
name: Son, H.-S.
name: Khoramnia, R.
name: Auffarth, G.U.
Publisher: name: German Medical Science GMS Publishing House
Year: 2021
Subjects: subject: 610 Medical sciences; Medicine

description: Hintergrund: Die Implantation additiver sulkus-gestützter Intraokularlinsen (IOL) stellt eine Möglichkeit zur Optimierung der refraktiven Ergebnisse in pseudophaken Augen dar. Ein Kritikpunkt ist die vorstellbare Verschlechterung der Bildqualität durch das Zwei-Linsen-System. In dieser[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 35. Kongress der Deutschsprachigen Gesellschaft für Intraokularlinsen-Implantation, interventionelle und refraktive Chirurgie
Improving Photometric Redshifts using GALEX Observations for the SDSS Stripe 82 and the Next Generation of SZ Cluster Surveys
Creators: name: Niemack, Michael D.
name: Jimenez, Raul
name: Verde, Licia
name: Menanteau, Felipe
name: Panter, Ben
name: Spergel, David
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Four large-area Sunyaev-Zeldovich (SZ) experiments -- APEX-SZ, SPT, ACT, and Planck -- promise to detect clusters of galaxies through the distortion of Cosmic Microwave Background photons by hot (> 10^6 K) cluster gas (the SZ effect) over thousands of square degrees. A large observational follow-up effort to obtain redshifts for these SZ-detected clusters is under way. Given the large area covered by these surveys, most of the redshifts will be obtained via the photometric redshift (photo-z) technique. Here we demonstrate, in an application using ~3000 SDSS stripe 82 galaxies with r<20, how the addition of GALEX photometry (FUV, NUV) greatly improves the photometric redshifts of galaxies obtained with optical griz or ugriz photometry. In the case where large spectroscopic training sets are available, empirical neural-network-based techniques (e.g., ANNz) can yield a photo-z scatter of $σ_z = 0.018 (1+z)$. If large spectroscopic training sets are not available, the addition of GALEX data makes possible the use simple maximum likelihood techniques, without resorting to Bayesian priors, and obtains $σ_z=0.04(1+z)$, accuracy that approaches the accuracy obtained using spectroscopic training of neural networks on ugriz observations. This improvement is especially notable for blue galaxies. To achieve these results, we have developed a new set of high resolution spectral templates based on physical information about the star formation history of galaxies. We envision these templates to be useful for the next generation of photo-z applications. We make our spectral templates and new photo-z catalogs available to the community at http://www.ice.csic.es/personal/jimenez/PHOTOZ .
description: 10 pages, 8 figures
Exploratory Data Analysis for Airline Disruption Management
Creators: name: Ogunsina, Kolawole
name: Bilionis, Ilias
name: DeLaurentis, Daniel
Publisher: name: arXiv
Year: 2021
Subjects: subject: Applications (stat.AP)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Reliable platforms for data collation during airline schedule operations have significantly increased the quality and quantity of available information for effectively managing airline schedule disruptions. To that effect, this paper applies macroscopic and microscopic techniques by way of basic statistics and machine learning, respectively, to analyze historical scheduling and operations data from a major airline in the United States. Macroscopic results reveal that majority of irregular operations in airline schedule that occurred over a one-year period stemmed from disruptions due to flight delays, while microscopic results validate different modeling assumptions about key drivers for airline disruption management like turnaround as a Gaussian process.
title: Vergleich der optischen Funktion von Intraokularlinsen mit unterschiedlichen Trübungsmustern: Analyse von 67 Explantaten
Creators: name: Łabuz, Grzegorz
name: Yildirim, T.M.
name: Khoramnia, R.
name: Son, H.-S.
name: Auffarth, G.U.
Publisher: name: German Medical Science GMS Publishing House
Year: 2021
Subjects: subject: 610 Medical sciences; Medicine

description: Hintergrund: Intraokularlinsen (IOL)-Kalzifikationen wurde in der Vergangenheit mit bildgebenden Verfahren untersucht, die bestimmte morphologische Muster erkennen ließen. In dieser Studie wurde mittels optischer Messtechniken untersucht, wie die Art der Trübung die Funktion der IOL vor der[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 35. Kongress der Deutschsprachigen Gesellschaft für Intraokularlinsen-Implantation, interventionelle und refraktive Chirurgie
Κυβερνοέγκλημα : Μια παγκόσμια απειλή με ασύμμετρες διαστάσεις
Creators: name: Γιουβαννοπούλου, Φανή Βασιλείου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Κυβερνοέγκλημα
Απειλή
Διαστάσεις
Cybercrime
Threat
Dimensions

description: Σκοπός της διπλωματικής εργασίας ήταν η μελέτη του κυβερνοεγκλήματος, χαρακτηριζόμενο ως μια παγκόσμια απειλή με ασύμμετρες διαστάσεις. Αρχικώς προσεγγίσαμε εννοιολογικώς το κυβερνοέγκλημα , εκ προσδιορισμών – διαχωρισμών και συγκρίσεων, με έννοιες όπως η κυβερνοασφάλεια, η κυβερνοεπίθεση και ο κυβερνοπόλεμος. Στη συνέχεια αναλύσαμε ενδελεχώς τις συνηθέστερες μορφές του κυβερνοεγκλήματος μετά των συναφών αδικημάτων, όπως αυτές κατηγοριοποιούνται στην παγκόσμια επιστημονική βιβλιογραφία. Ακόμη, τοποθετήσαμε το κυβερνοέγκλημα στην νομική του διάσταση, εξετάζοντας το νομικό πλαίσιο της πρόληψης, διερεύνησης, δίωξης και καταστολής του, σε εθνικό, ευρωπαϊκό και διεθνές επίπεδο . Ένα άλλο θέμα που αναλύσαμε ήταν η οικονομική διάσταση του κυβερνοεγκλήματος μέσω μιας << εξωτερίκευσης >> της σχέσεως αυτού, με το νέο ψηφιακό νόμισμα ή κρυπτονόμισμα ή bitcoin. Ασχοληθήκαμε επιπλέον με τη συνοπτική αναφορά των φορέων, των στρατηγικών και των μεθόδων αντιμετώπισης του κυβερνοεγκλήματος , από την εθνική μέχρι την διεθνική του πτυχή
description: The aim of the diplomatic work was the study of the cybercrime, characterized as a global threat with asymmetric dimensions. Initially, we conceptually approached the cybercrime, from determinations - separations and comparisons with concepts such as cyber security, cybercrime and cyberwar. We then thoroughly analyzed the most common forms of cybercrime with related offenses, as these are categorized in the world scientific literature. We have also placed cybercrime in its legal dimension by examining the legal framework for its prevention, investigation, prosecution and repression at national, European and international level. Αnother issue we analyzed was the economic dimension of cybercrime by means of an "externalization" of this relationship, with the new digital currency or the coinage or bitcoin. We have also dealt with the briefing of actors, strategies and methods of coping with cybercrime, from its national to transnational aspect
title: State of the art der Ablatiochirurgie – ppV und Buckelchirurgie
Creators: name: Hoerauf, Hans
Publisher: name: German Medical Science GMS Publishing House
Year: 2021
Subjects: subject: 610 Medical sciences; Medicine

description: Die der heutigen Operationstechnik zugrundeliegende Prinzipien der Ablatiochirurgie beruht auf einem Prinzip der mechanischen Zugentlastung und dem Lochverschluss durch Narbeninduktion, das auf Gonin zurückgeht und durch Verfeinerung der operativen Techniken im Laufe von Jahrzehnten durch bekannte[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 35. Kongress der Deutschsprachigen Gesellschaft für Intraokularlinsen-Implantation, interventionelle und refraktive Chirurgie
Παχώμιος Ρουσάνος Πρόσωπο και Έργο
Creators: name: Παππάς, Ηλίας Μάρκου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Παχώμιος Ρουσάνος
Ιωαννίκιος Καρτάνος
16ος αιώνας
Pachomios Rousanos
Ioannikios Kartanos
16th century

description: Με την παρούσα διπλωματική εργασία στοχεύουμε να παρουσιάσουμε την προσωπικότητα του λόγιου μοναχού Παχώμιου Ρουσάνου (1508-1553). Αξιοποιώντας τις πληροφορίες που μπορούμε να αντλήσουμε πρωτίστως από τα συγγράμματά του επιχειρούμε να παρουσιάσουμε με όσο γίνεται ακριβέστερο τρόπο τον βίο του. Μελετώντας το ιστορικό-κοινωνικό πλαίσιο των αρχών του 16ου αιώνα στην περιοχή των επτανήσιων, παρουσιάζουμε τα διάφορα ερεθίσματα που είχε στην παιδική και νεανική του ηλικία. Στην συνέχεια καταγράφουμε τους σημαντικότερους σταθμούς των συχνών του περιοδειών, σε όλα σχεδόν τα μέρη όπου υπήρξε Ελληνισμός. Ιδιαίτερη έμφαση δίνουμε στην σχεδόν δεκαετή διαμονή του στο Άγιο Όρος (1535-1544), η οποία υπήρξε καθοριστική για τη διαμόρφωση του χαρακτήρα του και τη θεολογική του κατάρτιση. Την μεγαλύτερη έκταση της μελέτης μας την κατέχει η παρουσίαση και η ανάλυση του συγγραφικού του έργου. Για την καλύτερη κατανόηση το διαιρούμε σε θεματικές ενότητες. Ένα εξίσου σημαντικό θέμα που θίξαμε είναι η πολεμική που άσκησε ο Παχώμιος Ρουσάνος στην αιρετική διδασκαλία του Ιωαννικίου Καρτάνου και των ακολουθών του.
description: The present Thesis is dedicated to Pachomios Rousanos, an erudite monk of the 16th century (1508-1553). Based on his writings and utilizing the modern studies on the history of the eastern Mediterranean during these years we attempt to provide a well based study about his life, his voyages around the Levant, his educational and theological activities. we demonstrate the worth of his writings as source for the history of the modern Hellenism and his attempts for the revival of the classical education. Finally we present his theological dispute with Ioannikios Kartanos.
Analysis of the chemical evolution of the Galactic disk via dynamical simulations of the open cluster system
Creators: name: Tecce, T. E.
name: Pellizza, L. J.
name: Piatti, A. E.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: For several decades now, open clusters have been used to study the structure and chemical evolution of the disk of our Galaxy. Due to the fact that their ages and metallicities can be determined with relatively good precision, and since they can be observed even at great distances, they are excellent tracers of the variations in the abundance of heavy chemical elements with age and position in the Galactic disk. In the present work we analyze the star formation history and the chemical evolution of the disk of the Galaxy using numerical simulations of the dynamical evolution of the system of open clusters in the Milky Way. Starting from hypotheses on the history of cluster formation and the chemical enrichment of the disk, we model the present properties of the Galactic open cluster system. The comparison of these models with the observations allows us to examine the validity of the assumed hypotheses and to improve our knowledge about the initial conditions of the chemical evolution of the Galactic disk.
description: 7 pages, 4 figures, baaa-eng.sty. Presented at the 48th Annual Meeting of the Argentine Astronomical Society, accepted for publication in BAAA
Convergence of an adaptive discontinuous Galerkin method for the Biharmonic problem
Creators: name: Dominicus, Alexander
Publisher: name: Technische Universität Dortmund
Year: 2020
Subjects: subject: Adaptive discontinuous Galerkin methods
subject: Symmetric interior penalty method
subject: Convergence
subject: Biharmonic problem
subject: 510
subject: Diskontinuierliche Galerkin-Methode
subject: Adaptives Verfahren
subject: Bipotentialgleichung

description: In this thesis we develop a basic convergence result for an adaptive symmetric interior penalty discontinuous Galerkin discretisation for the Biharmonic problem which provides convergence without rates for arbitrary polynomial degree r≥2, all practically relevant marking strategies and all penalty parameters assuring coercivity of the method. We have to deal with the problem that the spaces consisting of piecewise polynomial functions may possibly contain no proper C^1-conforming subspace. This prevents from a straightforward generalisation of convergence results of adaptive discontinuous Galerkin methods for elliptic PDEs and requires the development of some new key technical tools. The convergence analysis is based on several embedding properties of (broken) Sobolev and BV spaces, and the construction of a suitable limit space of the non-conforming discrete spaces, created by the adaptive algorithm. Finally, the convergence result is validated through a number of numerical experiments.
Substructure around M31 : Evolution and Effects
Creators: name: Gauthier, Jean-Rene
name: Dubinski, John
name: Widrow, Lawrence M.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We investigate the evolution of a population of 100 dark matter satellites orbiting in the gravitational potential of a realistic model of M31. We find that after 10 Gyr, seven subhalos are completely disrupted by the tidal field of the host galaxy. The remaining satellites suffer heavy mass loss and overall, 75% of the mass initially in the subhalo system is tidally stripped. Not surprisingly, satellites with pericentric radius less than 30 kpc suffer the greatest stripping and leave a complex structure of tails and streams of debris around the host galaxy. Assuming that the most bound particles in each subhalo are kinematic tracers of stars, we find that the halo stellar population resulting from the tidal debris follows an r^{-3.5} density profile at large radii. We construct B-band photometric maps of stars coming from disrupted satellites and find conspicuous features similar both in morphology and brightness to the observed Giant Stream around Andromeda. An assumed star formation efficiency of 5-10% in the simulated satellite galaxies results in good agreement with the number of M31 satellites, the V-band surface brightness distribution, and the brightness of the Giant Stream. During the first 5 Gyr, the bombardment of the satellites heats and thickens the disk by a small amount. At about 5 Gyr, satellite interations induce the formation of a strong bar which, in turn, leads to a significant increase in the velocity dispersion of the disk.
description: 45 pages, 18 figures. To be submitted to the Astrophysical Journal, version 2.0 : scale height value corrected, references added, and some figures have been modified
Observation of WZ Production
Creators: name: CDF Collaboration
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We report the first observation of the associated production of a W boson and a Z boson. This result is based on 1.1 fb-1 of integrated luminosity from ppbar collisions at sqrt{s} = 1.96 TeV collected with the CDF II detector at the Fermilab Tevatron. We observe 16 WZ candidates passing our event selection with an expected background of 2.7 +/- 0.4 events. A fit to the missing transverse energy distribution indicates an excess of events compared to the background expectation corresponding to a significance equivalent to six standard deviations. The measured cross section is sigma(ppbar -> WZ) = 5.0^{+1.8}_{-1.6} pb, consistent with the standard model expectation.
description: 7 pages, 3 figures. Submitted to Phys. Rev. Lett
title: Spezielle Techniken in der Chirurgie des Makulaforamens
Creators: name: Bopp, Silvia
Publisher: name: German Medical Science GMS Publishing House
Year: 2021
Subjects: subject: 610 Medical sciences; Medicine

description: Seit der Einführung der Makulalochchirurgie (MHS) 1991 durch Kelly und Wendel hat die technische Evolution zu primären anatomische Erfolgsraten in bis zu 95% geführt. Derzeitiger Standard ist die Pars-plana-Vitrektomie mit farbstoffgeführtem ILM-peeling. Die chirurgische Entwicklung[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 35. Kongress der Deutschsprachigen Gesellschaft für Intraokularlinsen-Implantation, interventionelle und refraktive Chirurgie
title: Phake Augen und Silikonöltamponade – kann das gut gehen?
Creators: name: Schmidt, Jörg C.
Publisher: name: German Medical Science GMS Publishing House
Year: 2021
Subjects: subject: 610 Medical sciences; Medicine

description: Cibis & Scott haben die Silikonöl-Tamponade in die vitreoretinale Chirurgie eingeführt, allerdings wegen heftiger PVR-Reaktion wieder verlassen. Zivojinovic erkannte den verbliebenden anterioren Glaskörper als wesentliche Ursache für die zum Teil desaströsen Entwicklungen[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 35. Kongress der Deutschsprachigen Gesellschaft für Intraokularlinsen-Implantation, interventionelle und refraktive Chirurgie
Mechanisms of wear particle formation and detachment
Creators: name: Knowles, Gregory D.
Publisher: name: University of British Columbia
Year: 2009

description: A fundamental investigation into the mechanism of wear particle formation for martensitic stainless steel has been conducted using the simple contact configuration of a hard steel ball and a flat stainless steel surface. The effects of changes in hardness and surface finish of the flat surface were examined for three lubrication conditions, over a wide range of test durations. Friction force and work data were collected during testing, and wear scars were examined by surface profilometry and optical and scanning electron microscopy. Results of this study demonstrate the operation of several complex wear mechanisms and the inherently microscopic scale of wear. A few simple models are suggested for the separate wear mechanisms; however greater understanding of many of the wear mechanisms will have to be achieved before a complete and predictive wear model can be developed.
Fermion Electric Dipole Moments in R-parity violating Supersymmetry
Creators: name: Godbole, Rohini M.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this talk I discuss some aspects of the study of electric dipole moments (EDMs) of the fermions, in the context of R-parity violating (\rpv) Supersymmetry (SUSY). I will start with a brief general discussion of how dipole moments, in general, serve as a probe of physics beyond the Standard Model (SM) and an even briefer summary of \rpv SUSY. I will follow by discussing a general method of analysis for obtaining the leading fermion mass dependence of the dipole moments and present its application to \rpv SUSY case. Then I will summarise the constraints that the analysis of $e,n$ and $Hg$ EDMs provide for the case of trilinear \rpv SUSY couplings and make a few comments on the case of bilinear \rpv, where the general method of analysis proposed by us does not work.
description: Invited talk presented at the IPM School and Conference on Lepton Hadron Physics, Tehran, Iran, May 2006; to appear in the proceedings, uses LaTeX, 7 pages, 4 figures
Hilbert's Tenth Problem for function fields of varieties over C
Creators: name: Eisentraeger, Kirsten
Publisher: name: arXiv
Year: 2006
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11U05 (Primary); 03B25 (Secondary)

description: Let K be the function field of a variety of dimension at least 2 over an algebraically closed field of characteristic zero. Then Hilbert's Tenth Problem for K is undecidable. This generalizes the result by Kim and Roush from 1992 that Hilbert's Tenth Problem for the purely transcendental function field C(t_1,t_2) is undecidable.
description: 12 pages
title: Eignung einer ,High Add‘-IOL bei Patienten mit Silikonöltamponade
Creators: name: Graff, Birte
name: Kaymak, H.
name: Nienhaus, S.
name: Klabe, K.
name: Langenbucher, A.
name: Schwahn, H.
Publisher: name: German Medical Science GMS Publishing House
Year: 2021
Subjects: subject: 610 Medical sciences; Medicine

description: Hintergrund: Bei Anwendung einer Silikonöltamponade nach einer Vitrektomie kommt es, aufgrund des höheren Brechungsindex des Silikonöls, zu einer Refraktionsänderung um ca. +6 dpt, welche für die Zeit der Silikonöltamponade mit einem optischen Korrektionsmittel ausgeglichen[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 35. Kongress der Deutschsprachigen Gesellschaft für Intraokularlinsen-Implantation, interventionelle und refraktive Chirurgie
Fast Laser Cooling Using Optimal Quantum Control
Creators: name: Li, Xie-Qian
name: Zhang, Shuo
name: Zhang, Jie
name: Wu, Wei
name: Guo, Chu
name: Chen, Ping-Xing
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Cooling down a trapped ion into its motional ground state is a central step for trapped ions based quantum information processing. State of the art cooling schemes often work under a set of optimal cooling conditions derived analytically using a perturbative approach, in which the sideband coupling is assumed to be the weakest of all the relevant transitions. As a result the cooling rate is severely limited. Here we propose to use quantum control technique powered with automatic differentiation to speed up the classical cooling schemes. We demonstrate the efficacy of our approach by applying it to find the optimal cooling conditions for classical sideband cooling and electromagnetically induced transparency cooling schemes, which are in general beyond the weak sideband coupling regime. Based on those numerically found optimal cooling conditions, we show that faster cooling can be achieved while at the same time a low average phonon occupation can be retained.
description: 8 pages, 4 figures, 1 table
Existence of a Supersymmetric Massless Ground State of the $SU(N)$ Matrix Model globally on its Valleys
Creators: name: Boulton, L.
name: del Moral, M. P. Garcia
name: Restuccia, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In this work we consider the existence and uniqueness of the ground state of the regularized Hamiltonian of the Supermembrane in dimensions $D= 4,\,5,\,7$ and 11, or equivalently the $SU(N)$ Matrix Model. That is, the 0+1 reduction of the 10-dimensional $SU(N)$ Super Yang-Mills Hamiltonian. This ground state problem is associated with the solutions of the inner and outer Dirichlet problems for this operator, and their subsequent smooth patching (glueing) into a single state. We have discussed properties of the inner problem in a previous work, therefore we now investigate the outer Dirichlet problem for the Hamiltonian operator. We establish existence and uniqueness on unbounded valleys defined in terms of the bosonic potential. These are precisely those regions where the bosonic part of the potential is less than a given value $V_0$, which we set to be arbitrary. The problem is well posed, since these valleys are preserved by the action of the $SU(N)$ constraint. We first show that their Lebesgue measure is finite, subject to restrictions on $D$ in terms of $N$. We then use this analysis to determine a bound on the fermionic potential which yields the coercive property of the energy form. It is from this, that we derive the existence and uniqueness of the solution. As a by-product of our argumentation, we show that the Hamiltonian, restricted to the valleys, has spectrum purely discrete with finite multiplicity. Remarkably, this is in contrast to the case of the unrestricted space, where it is well known that the spectrum comprises a continuous segment. We discuss the relation of our work with the general ground state problem and the question of confinement in models with strong interactions.
description: Latex, 31 pages
title: Iatrogener retinaler Arterienverschluss nach Retrobulbäranästhesie
Creators: name: Jade, Mohamed El
Publisher: name: German Medical Science GMS Publishing House
Year: 2021
Subjects: subject: 610 Medical sciences; Medicine

description: Zwei Fallberichte: Patient 1 (m, 54): gab am ersten postoperativen Tag nach einer komplikationsloser Trabekulektomie in Retrobulbäranästhesie eine zentrale Gesichtsfeldeinschränkung am rechten Auge bei einem Visus von 0,8–1,0 an. Funduskopisch zeigte sich v.a. der inferiore Makulabereich[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 35. Kongress der Deutschsprachigen Gesellschaft für Intraokularlinsen-Implantation, interventionelle und refraktive Chirurgie
Η σχέση μεταξύ χρηματοπιστωτικών κρίσεων, τραπεζικών κρίσεων και κρίσεων δημόσιου χρέους
Creators: name: Μαρτίου, Γεώργιος Δημητρίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Χρηματοπιστωτικές κρίσεις
Κρίσεις Δημοσίου Χρέους
Τραπεζικές κρίσεις
Financial crises
Bank crises
Sovereign debt crises
Finansiell kris
Bank kris och
Offentlig skuldkris

description: Στόχος της συγκεκριμένης μεταπτυχιακής εργασίας είναι η μελέτη της σχέσης μεταξύ χρηματοπιστωτικών κρίσεων, τραπεζικών κρίσεων και κρίσεων δημοσίου χρέους. Η ύπαρξη ή μη μιας ανταλλακτικής σχέσης, ενός trade-off, μεταξύ των δημοσίων χρεών των κρατών και των κρίσεων του χρηματοπιστωτικού τομέα έχει ταλανίσει ιδιαίτερα τους οικονομολόγους και αποτελεί επίκαιρο και ιδιαίτερα δημοφιλές κομμάτι επιστημονικής έρευνας σε παγκόσμιο επίπεδο από διάφορους οργανισμούς. Οι θεωρίες οικονομικών κρίσεων μπορούν να εξηγήσουν σε μεγάλο βαθμό τα ενδογενή αίτια της κρίσης, ωστόσο μέσα από παραδείγματα λειτουργίας του οικονομικού συστήματος σε όλα τα επίπεδα θα προσπαθήσουμε να αξιολογήσουμε την φύση και τη μορφή τους. Μετά από οικονομετρική προσέγγιση του θέματος και αφού παρουσιάσουμε υπάρχουσες μελέτες του τριπτύχου χρηματοπιστωτικές κρίσεις, τραπεζικές κρίσεις και κρίσεις δημοσίου χρέους θα καταλήξουμε στα δικά μας εμπειρικά συμπεράσματα.
description: The aim of this postgraduate thesis is to study the relationship between financial crises, bank crises and sovereign debt crises. The existence of a trade-off relationship between public debts and financial sector crises has particularly plagued economists and is an up-to-date and highly popular piece of scientific research at a global level by various organizations and economic laboratories. Theories of economic crises can explain to a great extent the intrinsic causes of the crisis, but through examples of the operation of the economic system at all levels we will try to evaluate their nature and form. After an econometric approach to the issue and after presenting studies of tripling financial crises, bank crises and sovereign debt crises, we will come to our own empirical conclusions.
Grounding Spatio-Temporal Language with Transformers
Creators: name: Karch, Tristan
name: Teodorescu, Laetitia
name: Hofmann, Katja
name: Moulin-Frier, Clément
name: Oudeyer, Pierre-Yves
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Computation and Language (cs.CL)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Language is an interface to the outside world. In order for embodied agents to use it, language must be grounded in other, sensorimotor modalities. While there is an extended literature studying how machines can learn grounded language, the topic of how to learn spatio-temporal linguistic concepts is still largely uncharted. To make progress in this direction, we here introduce a novel spatio-temporal language grounding task where the goal is to learn the meaning of spatio-temporal descriptions of behavioral traces of an embodied agent. This is achieved by training a truth function that predicts if a description matches a given history of observations. The descriptions involve time-extended predicates in past and present tense as well as spatio-temporal references to objects in the scene. To study the role of architectural biases in this task, we train several models including multimodal Transformer architectures; the latter implement different attention computations between words and objects across space and time. We test models on two classes of generalization: 1) generalization to randomly held-out sentences; 2) generalization to grammar primitives. We observe that maintaining object identity in the attention computation of our Transformers is instrumental to achieving good performance on generalization overall, and that summarizing object traces in a single token has little influence on performance. We then discuss how this opens new perspectives for language-guided autonomous embodied agents. We also release our code under open-source license as well as pretrained models and datasets to encourage the wider community to build upon and extend our work in the future.
description: Contains main article and supplementaries
Roughness on liquid-infused surfaces induced by capillary waves
Creators: name: Sundin, Johan
name: Zaleski, Stéphane
name: Bagheri, Shervin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Liquid-infused surfaces (LIS) are a promising technique for reducing friction, fouling and icing in both laminar and turbulent flows. Previous work has demonstrated that these surfaces are susceptible to shear-driven drainage. Here, we report a different failure mode using direct numerical simulations of a turbulent channel flow with liquid-infused longitudinal grooves. When the liquid-liquid surface tension is small and/or grooves are wide, we observe traveling-wave perturbations on the interface with amplitudes larger than the viscous sublayer of the turbulent flow. These capillary waves induce a roughness effect that increases drag. The generation mechanism of these waves is explained using the theory developed by Miles for gravity waves. Energy is transferred from the turbulent flow to the LIS provided that there is a negative curvature of the mean flow at the critical layer. Given the groove width, the Weber number and an estimate of the friction Reynolds number, we provide relations to determine whether a LIS behaves as a smooth or rough surface in a turbulent flow.
System Size and Energy Dependence of Jet-Induced Hadron Pair Correlation Shapes in Cu+Cu and Au+Au Collisions at sqrt(s_NN) = 200 and 62.4 GeV
Creators: name: PHENIX Collaboration
name: Adare, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: We present azimuthal angle correlations of intermediate transverse momentum (1-4 GeV/c) hadrons from {dijets} in Cu+Cu and Au+Au collisions at sqrt(s_NN) = 62.4 and 200 GeV. The away-side dijet induced azimuthal correlation is broadened, non-Gaussian, and peaked away from Δϕ=πin central and semi-central collisions in all the systems. The broadening and peak location are found to depend upon the number of participants in the collision, but not on the collision energy or beam nuclei. These results are consistent with sound or shock wave models, but pose challenges to Cherenkov gluon radiation models.
description: 464 authors from 60 institutions, 6 pages, 3 figures, 2 tables. Submitted to Physical Review Letters. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html
title: Kapselsackimplantation bei PEX – wirklich das Verfahren der Wahl?
Creators: name: Krepler, Katharina
name: Vandemeulebroecke, N.
Publisher: name: German Medical Science GMS Publishing House
Year: 2021
Subjects: subject: 610 Medical sciences; Medicine

description: Zielsetzung: Kataraktchirurg/innen sollen die besonderen anatomischen und pathophysiologischen Gegebenheiten des Pseudoexfoliationssyndroms während und nach einer Operation verdeutlicht werden. Es soll dargestellt werden, welche Lösungswege für mögliche intraoperative Schwierigkeiten[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 35. Kongress der Deutschsprachigen Gesellschaft für Intraokularlinsen-Implantation, interventionelle und refraktive Chirurgie
A Model-Based Frequency Constraint for Mining Associations from Transaction Data
Creators: name: Hahsler, Michael
Publisher: name: arXiv
Year: 2008
Subjects: subject: Databases (cs.DB)
subject: FOS: Computer and information sciences
subject: H.2.8

description: Mining frequent itemsets is a popular method for finding associated items in databases. For this method, support, the co-occurrence frequency of the items which form an association, is used as the primary indicator of the associations's significance. A single user-specified support threshold is used to decided if associations should be further investigated. Support has some known problems with rare items, favors shorter itemsets and sometimes produces misleading associations. In this paper we develop a novel model-based frequency constraint as an alternative to a single, user-specified minimum support. The constraint utilizes knowledge of the process generating transaction data by applying a simple stochastic mixture model (the NB model) which allows for transaction data's typically highly skewed item frequency distribution. A user-specified precision threshold is used together with the model to find local frequency thresholds for groups of itemsets. Based on the constraint we develop the notion of NB-frequent itemsets and adapt a mining algorithm to find all NB-frequent itemsets in a database. In experiments with publicly available transaction databases we show that the new constraint provides improvements over a single minimum support threshold and that the precision threshold is more robust and easier to set and interpret by the user.
Modeling Aspect Mechanisms: A Top-Down Approach
Creators: name: Kojarski, Sergei
name: Lorenz, David H.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Software Engineering (cs.SE)
subject: Programming Languages (cs.PL)
subject: FOS: Computer and information sciences
subject: D.2.10; D.1.5; D.3.2

description: A plethora of diverse aspect mechanisms exist today, all of which integrate concerns into artifacts that exhibit crosscutting structure. What we lack and need is a characterization of the design space that these aspect mechanisms inhabit and a model description of their weaving processes. A good design space representation provides a common framework for understanding and evaluating existing mechanisms. A well-understood model of the weaving process can guide the implementor of new aspect mechanisms. It can guide the designer when mechanisms implementing new kinds of weaving are needed. It can also help teach aspect-oriented programming (AOP). In this paper we present and evaluate such a model of the design space for aspect mechanisms and their weaving processes. We model weaving, at an abstract level, as a concern integration process. We derive a weaving process model (WPM) top-down, differentiating a reactive from a nonreactive process. The model provides an in-depth explanation of the key subpro existing aspect mechanisms.
Of Mice and Chickens: Revisiting the RC Time Constant Problem
Creators: name: Iwasa, Kuni H.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Avian hair cells depend on electrical resonance for frequency selectivity. The upper bound of the frequency range is limited by the RC time constant of hair cells because the sharpness of tuning requires that the resonance frequency must be lower than the RC roll-off frequency. In contrast, tuned mechanical vibration of the inner ear is the basis of frequency selectivity of the mammalian ear. This mechanical vibration is supported by outer hair cells (OHC) with their electromotility based on piezoelectricity, which is driven by the receptor potential. Thus it is also subjected to the RC time constant problem. Association of OHCs with a system with mechanical resonance leads to piezoelectric resonance. This resonance can nullify the membrane capacitance and solves the RC time constant problem for OHCs.
description: 22 pages, 8 figures
Fermion Absorption Cross Section and Topology of Spherically Symmetric Black Holes
Creators: name: Liu, Yu-Xiao
name: Zhao, Li
name: Cao, Zhen-Bin
name: Duan, Yi-Shi
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In 1997, Liberati and Pollifrone in Phys. Rev. D56 (1997) 6458 (hep-th/9708014) achieved a new formulation of the Bekenstein-Hawking formula, where the entropy and the Euler characteristic are related by $S=χA/8$. In this work we present a relation between the low-energy absorption cross section for minimally coupled fermions and the Euler characteristic of (3+1)-dimensional spherically symmetric black holes, i.e. $σ=χg_h^{-1}A$. Based on the relation, using the Gauss--Bonnet--Chern theorem and the $ϕ$-mapping method, an absorption cross section density is introduced to describe the topology of the absorption cross section. It is shown that the absorption cross section and its density are determined by the singularities of the timelike Killing vector field of the spacetime and these singularities carry the topological numbers, Hopf indices and Brouwer degrees, naturally.
description: 16 pages, no figures, accepted by Phys. Lett. B
Minimal model for Hilbert space fragmentation with local constraints
Creators: name: Mukherjee, Bhaskar
name: Banerjee, Debasish
name: Sengupta, K.
name: Sen, Arnab
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Lattice (hep-lat)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Motivated by previous works on a Floquet version of the PXP model [Mukherjee {\it et al.} Phys. Rev. B 102, 075123 (2020), Mukherjee {\it et al.} Phys. Rev. B 101, 245107 (2020)], we study a one-dimensional spin-$1/2$ lattice model with three-spin interactions in the same constrained Hilbert space (where all configurations with two adjacent $S^z=\uparrow$ spins are excluded). We show that this model possesses an extensive fragmentation of the Hilbert space which leads to a breakdown of thermalization upon unitary evolution starting from a large class of simple initial states. Despite the non-integrable nature of the Hamiltonian, many of its high-energy eigenstates admit a quasiparticle description. A class of these, which we dub as "bubble eigenstates", have integer eigenvalues (including mid-spectrum zero modes) and strictly localized quasiparticles while another class contains mobile quasiparticles leading to a dispersion in momentum space. Other anomalous eigenstates that arise due to a {\it secondary} fragmentation mechanism, including those that lead to flat bands in momentum space due to destructive quantum interference, are also discussed. The consequences of adding a (non-commuting) staggered magnetic field and a PXP term respectively to this model, where the former preserves the Hilbert space fragmentation while the latter destroys it, are discussed. A Floquet version with time-dependent staggered field also evades thermalization with additional features like freezing of exponentially many states at special drive frequencies. Finally, we map the model to a $U(1)$ lattice gauge theory coupled to dynamical fermions and discuss the interpretation of some of these anomalous states in this language. A class of gauge-invariant states show reduced mobility of the elementary charged excitations with only certain charge-neutral objects being mobile suggesting a connection to fractons.
description: v3; 22 pages, 11 figures, corrected some typos, close to published version
Additional file 1 of Adherence to post-surgery follow-up assessment and its association with sociodemographic and disease characteristics in patients with breast cancer in Central China
Creators: name: Feng, Ran
name: Jing, Jingfeng
name: Zhang, Xiaojun
name: Li, Ming
name: Gao, Jinnan
Publisher: name: figshare
Year: 2020
Subjects: Medicine
Cell Biology
Cancer
Science Policy

description: Additional file 1: Table S1. Annual follow-up among 711 patients during 2012–2019. Table S2. Factors associated with loss of follow-up at the 3rd year after surgery (N = 420). Figure S1. Patients included in the analyses during 2012–2018.
Διαπραγμάτευση μεταξύ πρακτόρων για την κατανομή ηλεκτρικών οχημάτων σε ένα σύνολο ανταγωνιστικών σταθμών φόρτισης
Creators: name: Σεϊταρίδης, Ανδρέας Γεωργίου
Publisher: name: Aristotle University of Thessaloniki
Year: 2018
Subjects: Ηλεκτρικά Οχήματα
Διαπραγμάτευση
Γραμμική Βελτιστοποίηση
Electric Vehicles
Negotiation
Linear Optimization

description: Αντικείμενο της εργασίας αποτελεί η μελέτη ενός ολοκληρωμένου πολυπρακτορικού συστήματος που αποτελείται από πολλούς σταθμούς φόρτισης και ηλεκτρικά οχήματα. Κάθε όχημα έχει ορισμένες προτιμήσεις σχετικά με τη φόρτισή του, όπως χρονική στιγμή άφιξης ή αναχώρησης και το ποσό της ενέργειας που χρειάζεται. Οι σταθμοί, οι οποίοι είναι μεταξύ τους ανταγωνιστικοί, λαμβάνουν τα αιτήματα από τα οχήματα και υπολογίζουν ένα βέλτιστο πρόγραμμα φόρτισης με χρήση Γραμμικού Προγραμματισμού. Στη συνέχεια εφαρμόζοντας ο κάθε σταθμός τη στρατηγική του προσπαθεί να φτάσει όσο πιο κοντά γίνεται στον τελικό του στόχο, ο οποίος είναι είτε μεγιστοποίηση τους κέρδους του είτε μεγιστοποίηση της εξυπηρέτησης. Επιπλέον, υπάρχει φάση διαπραγμάτευσης μεταξύ των σταθμών και οχημάτων των οποίων δε μπόρεσαν να φορτίσουν στον αρχικό υπολογισμό του προγράμματος. Οι σταθμοί προτείνουν αλλαγές στις αρχικές προτιμήσεις των οχημάτων αυτών, ώστε τελικά να ικανοποιηθεί το αίτημά τους για φόρτιση. Τα οχήματα με βάση τη στρατηγική τους δέχονται ή όχι μία πρόταση. Οι παραπάνω διαδικασίες εκτελούνται είτε με γνώση όλων των δεδομένων εξαρχής από τους σταθμούς ή σε πραγματικό χρόνο, όπου αιτήματα μπορεί να καταφτάσουν οποιαδήποτε χρονική στιγμή.
description: The purpose of this dissertation is the study of a complete multiagent system that is composed by multiple charging stations and many electric vehicles. Each vehicle has its own preferences about its charging, such as the arrival or departure time and the energy that it needs. The stations, which compete each other for the EV-customers, accept requests for charging from the electric vehicles and each one computes its optimal schedule locally using Linear Programming and uses several strategies to attract more vehicles. The computed schedule should lead the station to the fulfillment of its own goals. There is also a negotiation phase between the stations and the electric vehicles that could not fit in the initial optimal charging schedule of some stations. The stations suggest alternatives to the initial preferences of the vehicles, so that they would fit in the schedule. Based on its strategy an EV accepts or reject these suggestions. These procedures can happen offline, which means that all the requests arrive at the same time and the stations compute the optimal overall schedule, or they can happen online (i.e., in real time), so requests can arrive at any time.