cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Activity time series of old stars from late F to early K. V. Effect on exoplanet detectability with high-precision astrometry
Creators: name: Meunier, N.
name: Lagrange, A. -M.
name: Borgniet, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Stellar activity strongly affects and may prevent the detection of Earth-mass planets in the habitable zone of solar-type stars with radial velocity technics. Astrometry is in principle less sensitive to stellar activity because the situation is more favourable: the stellar astrometric signal is expected to be fainter than the planetary astrometric signal compared to radial velocities. We quantify the effect of stellar activity on high-precision astrometry when Earth-mass planets are searched for in the habitable zone around old main-sequence solar-type stars. We used a very large set of magnetic activity synthetic time series to characterise the properties of the stellar astrometric signal. We then studied the detectability of exoplanets based on different approaches: first based on the theoretical level of false positives derived from the synthetic time series, and then with blind tests for old main-sequence F6-K4 stars. The amplitude of the signal can be up to a few times the solar value depending on the assumptions made for activity level, spectral type, and spot contrast. The detection rates for 1 MEarth planets are very good, however, with extremely low false-positive rates in the habitable zone for stars in the F6-K4 range at 10 pc. The standard false-alarm probability using classical bootstrapping on the time series strongly overestimates the false-positive level. This affects the detection rates. We conclude that if technological challenges can be overcome and very high precision is reached, astrometry is much more suitable for detecting Earth-mass planets in the habitable zone around nearby solar-type stars than radial velocity, and detection rates are much higher for this range of planetary masses and periods when astrometric techniques are used than with radial velocity techniques.
description: Accepted in Astronomy and Astrophysics
Probing the spin structure of the fractional quantum Hall magnetoroton with polarized Raman scattering
Creators: name: Nguyen, Dung Xuan
name: Son, Dam Thanh
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Starting from the Luttinger model for the band structure of GaAs, we derive an effective theory that describes the coupling of the fractional quantum Hall (FQH) system with photons in resonant Raman scattering experiments. Our theory is applicable in the regime when the energy of the photons $ω_0$ is close to the energy gap $E_G$, but $|ω_0-E_G|$ is much larger than the energy scales of the quantum Hall problem. In the literature, it is often assumed that Raman scattering measures the dynamic structure factor $S(ω,\mathbf{k})$ of the FQH. However, in this paper, we find that the light scattering spectrum measured in the experiments are proportional to the spectral densities of a pair of operators which we identified with the spin-2 components of the kinetic part of the stress tensor. In contrast with the dynamic structure factor, these spectral densities do not vanish in the long-wavelength limit $k\to0$. We show that Raman scattering with circularly polarized light can measure the spin of the magnetoroton excitation in the FQH system. We give an explicit expression for the kinetic stress tensor that works on any Landau level and which can be used for numerical calculations of the spectral densities that enter the Raman scattering amplitudes. We propose that Raman scattering provides a way to probe the bulk of the $ν=5/2$ quantum Hall state to determine its nature.
description: 25 pages, 1 figure. Comments are welcome!
Computational approach to finite size and shape effects in iron nanomagnets
Creators: name: McGuigan, Michael
name: Davenport, James
name: Glimm, James
Publisher: name: arXiv
Year: 2007
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We develop and validate a computational approach to nanomagnets. It is built on the spin wave approximation to a Heisenberg ferromagnet whose parameters can be calculated from a first principles theory (e.g. density functional theory). The method can be used for high throughput analysis of a variety of nanomagnetic materials. We compute the dependence of the magnetization of an iron nanomagnet on temperature, size and shape. The approach is applied to nanomagnets in the range of 432 atoms to 59 million atoms, a size which is several orders of magnitude beyond the scalability of density functional theory.
description: 15 pages, 9 figures
Evaluating the effect of city lock-down on controlling COVID-19 propagation through deep learning and network science models
Creators: name: Zhang, Xiaoqi
name: Ji, Zheng
name: Zheng, Yanqiao
name: Ye, Xinyue
name: Li, Dong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Populations and Evolution (q-bio.PE)
subject: Physics and Society (physics.soc-ph)
subject: Quantitative Methods (q-bio.QM)
subject: Applications (stat.AP)
subject: FOS: Biological sciences
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: The special epistemic characteristics of the COVID-19, such as the long incubation period and the infection through asymptomatic cases, put severe challenge to the containment of its outbreak. By the end of March 2020, China has successfully controlled the within-spreading of COVID-19 at a high cost of locking down most of its major cities, including the epicenter, Wuhan. Since the low accuracy of outbreak data before the mid of Feb. 2020 forms a major technical concern on those studies based on statistic inference from the early outbreak. We apply the supervised learning techniques to identify and train NP-Net-SIR model which turns out robust under poor data quality condition. By the trained model parameters, we analyze the connection between population flow and the cross-regional infection connection strength, based on which a set of counterfactual analysis is carried out to study the necessity of lock-down and substitutability between lock-down and the other containment measures. Our findings support the existence of non-lock-down-typed measures that can reach the same containment consequence as the lock-down, and provide useful guideline for the design of a more flexible containment strategy.
description: 27 pages, 9 figures
title: Intravitreales Fluocinolonacetonid (ILUVIEN) in der Behandlung des rezidivierenden/therapierefraktären diabetischen Makulaödems: „real-world“ 12- und 24-Monats-Ergebnisse
Creators: name: Chronopoulos, Argyrios
name: Strobel, M.A.
name: Fornoff, L.
name: Hattenbach, L.-O.
Publisher: name: German Medical Science GMS Publishing House
Year: 2019
Subjects: subject: 610 Medical sciences; Medicine

description: Hintergrund: Wir berichten unsere Erfahrung mit intravitrealem Fluocinolonacetonid (ILUVIEN) in der Behandlung des therapierefraktären/chronischen diabetischen Makulödems (DMÖ). Methoden: Retrospektive Analyse von konsekutiven Patienten mit therapierefraktärem/chronischem[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 32. Jahrestagung der Retinologischen Gesellschaft
title: Alterierte foveale Konfiguation und foveale avaskuläre Zone bei Alport Syndrom
Creators: name: Heß, Kristina
name: Pfau, M.
name: Wintergerst, M.W.M.
name: Holz, F.G.
name: Herrmann, P.
Publisher: name: German Medical Science GMS Publishing House
Year: 2019
Subjects: subject: 610 Medical sciences; Medicine

description: Hintergrund: Alport Syndrom (AS) ist eine multisystemische Erkrankung mit x-chromosomalem und autosomal-rezessivem Erbgang, die zu Nierenfunktionseinschränkungen, Hörschwäche und diversen okulären Veränderungen führt. Auslösende Mutationen sind in Genen, die für[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 32. Jahrestagung der Retinologischen Gesellschaft
Extended Soliton Solutions in an Effective Action for SU(2) Yang-Mills Theory
Creators: name: Sawado, Nobuyuki
name: Shiiki, Noriko
name: Tanaka, Shingo
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: The Skyrme-Faddeev-Niemi (SFN) model which is an O(3) $σ$ model in three dimensional space up to fourth-order in the first derivative is regarded as a low-energy effective theory of SU(2) Yang-Mills theory. One can show from the Wilsonian renormalization group argument that the effective action of Yang-Mills theory recovers the SFN in the infrared region. However, the theory contains an additional fourth-order term which destabilizes the soliton solution. We apply the perturbative treatment to the second derivative term in order to exclude (or reduce) the ill behavior of the original action and show that the SFN model with the second derivative term possesses soliton solutions.
description: Published in SIGMA (Symmetry, Integrability and Geometry: Methods and Applications) at http://www.emis.de/journals/SIGMA/
Impact of Kuchowicz Metric Function on Gravastars in f(R,T) Theory
Creators: name: Sharif, M.
name: Waseem, Arfa
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper discusses the configuration of gravitational vacuum star or gravastar with the impact of geometry and matter coupling present in $f(R,T)$ gravity. The gravastar is also conceptualized as a substitute for a black hole which is illustrated by three geometries known as (1) the interior geometry, (2) the intermediate thin-shell and (3) the exterior geometry. For a particular $f(R,T)$ model, we analyze these geometries corresponding to Kuchowicz metric function. We evaluate another metric potential for the interior domain as well as the intermediate shell which is non-singular for both domains. The Schwarzschild metric is adopted to demonstrate the exterior geometry of gravastar, while the numerical values of unknown constants are calculated through boundary conditions. Finally, we discuss different features of gravastar regions like proper length, energy, surface redshift as well as equation of state parameter. We conclude that the gravastar model can be regarded as a successful replacement of the black hole in the context of this gravity.
description: 20 pages, 8 figures
title: Behandlung vs. Observation bei Patienten mit diabetischem Makulaödem und sehr gutem Ausgangsvisus – OBTAIN-Studie
Creators: name: Busch, Catharina
name: Fraser-Bell, S.
name: Zur, D.
name: Rodríguez-Valdés, P.J.
name: Cebeci, Z.
name: Lupidi, M.
name: Fung, A.T.
name: Gabrielle, P.‑H.
name: Giancipoli, E.
name: Chaikitmongkol, V.
name: Okada, M.
name: Laíns, I.
name: Santos, A.R.
name: Kunavisarut, P.
name: Sala-Puigdollers, A.
name: Chhablani, J.
name: Ozimek, M.
name: Hilely, A.
name: Unterlauft, J.D.
name: Loewenstein, A.
name: Iglicki, M.
name: Rehak, M.
name: International Retina Group
Publisher: name: German Medical Science GMS Publishing House
Year: 2019
Subjects: subject: 610 Medical sciences; Medicine

description: Hintergrund: Ziel der Studie war die Beschreibung des funktionellen und anatomischen Ergebnisses von Patienten mit behandeltem und unbehandeltem diabetischem Makulaödem (DMÖ) und sehr guten Ausgangsvisus. Methoden: Retrospektive, multizentrische, 12-Monats-Observationsstudie. Eingeschlossen[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 32. Jahrestagung der Retinologischen Gesellschaft
title: Αλγοριθμική προσέγγιση για κατηγοριοποίηση πληροφοριών και παροχή υπηρεσιών υψηλής προστιθέμενης αξίας μέσω διαδικτύου
titleType: AlternativeTitle
title: Algorithmic approach for categorisation of information and benefit of High added value services via internet
Creators: name: Boutas, Sotirios D.
Publisher: name: National Technological University of Athens
Year: 2012
Subjects: Φιλτράρισμα πληροφορίας
Συστήματα συστάσεων
Νευρωνικά δίκτυα
Συστήματα διαχείρισης βάσεων δεδομένων
Γεωκωδικοποίηση
Αλγόριθμοι βαθμολόγησης
Information filtering
Recommender systems
Neural networks
Dbms
Geocoding
Ranking algorithms

description: 115 σ.
description: Η αλματώδης ανάπτυξη του Παγκόσμιου Ιστού τα τελευταία χρόνια τον έχει καταστήσει ως βασική πηγή πληροφόρησης για εκατομμύρια ανθρώπους. Ο τεράστιος όγκος δεδομένων που διακινείται μέσω αυτού, πολύ συχνά προκαλεί σύγχυση στο μέσο χρήστη, ο οποίος αδυνατεί να επιλέξει αυτό που πραγματικά τον ενδιαφέρει. Εδώ είναι που πρέπει διάχυτες τεχνικές πληροφορικής να παρέχουν τις σχετικές πληροφορίες σχετικά με προϊόντα και υπηρεσίες που σχετίζονται με τις ανάγκες των χρηστών. Η διατριβή αυτή παρουσιάζει ένα τέτοιο σύστημα, ο κύριος στόχος του οποίου είναι να επιλέξει, ανάμεσα από ένα σύνολο χρηστών, αυτούς που είναι πιο πιθανό να ενδιαφέρονται για συγκεκριμένα γεγονότα (events). Για την προσέγγιση, εφαρμόστηκε ένα εκτεταμένο σύστημα πληροφοριών μαζί με μία Web 2.0 γεωχωρική τεχνολογία API, το οποίο δοκιμάστηκε με προσομοιωμένα, αλλά και με αληθινά δεδομένα.
description: Due to its rapid development in the recent years, World Wide Web has become the basic source of information for millions of people around the world. However, the huge volume of data transferred through the Web often causes confusion to users, who are often unable to select the kind of information that is actually suitable to their needs. That is where ubiquitous computing techniques should provide relevant information regarding products and services related to the users’ needs. This paper presents such a system, the main goal of which is to select among a set of users, those who are most likely to be interested in specific events. For our approach we employed an information system along with web 2.0 geospatial API technology and we tested it over simulated and real-life data.
title: Großes Makulaforamen – Immer eine schlechte Prognose?
Creators: name: Klein, Julia
name: Bleidießl, N.
name: Klaas, J.
name: Feucht, N.
name: Nasseri, A.
name: Lohmann, C.P.
name: Maier, M.
Publisher: name: German Medical Science GMS Publishing House
Year: 2019
Subjects: subject: 610 Medical sciences; Medicine

description: Hintergrund: In zahlreichen Studien konnte ein präoperativ großes Makulaforamen (MF) (>400µm) als negativer prognostischer Faktor in Bezug auf postoperativen Visus und Verschlussrate identifiziert werden. Zum Vergleich des postoperativen Verlaufs bei kleinem, bzw. mittelgroßem,[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 32. Jahrestagung der Retinologischen Gesellschaft
An Optical Observational Cluster Mass Function at $z\sim1$ with the ORELSE Survey
Creators: name: Hung, D.
name: Lemaux, B. C.
name: Gal, R. R.
name: Tomczak, A. R.
name: Lubin, L. M.
name: Cucciati, O.
name: Pelliccia, D.
name: Shen, L.
name: Fèvre, O. Le
name: Zamorani, G.
name: Wu, P-F.
name: Kocevski, D. D.
name: Fassnacht, C. D.
name: Squires, G. K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present a new mass function of galaxy clusters and groups using optical/near-infrared wavelength spectroscopic and photometric data from the Observations of Redshift Evolution in Large-Scale Environments (ORELSE) survey. At $z\sim1$, cluster mass function studies are rare regardless of wavelength and have never been attempted from an optical/near-infrared perspective. This work serves as a proof of concept that $z\sim1$ cluster mass functions are achievable without supplemental X-ray or Sunyaev-Zel'dovich (SZ) data. Measurements of the cluster mass function provide important contraints on cosmological parameters and are complementary to other probes. With ORELSE, a new cluster finding technique based on Voronoi tessellation Monte-Carlo (VMC) mapping, and rigorous purity and completeness testing, we have obtained $\sim$240 galaxy overdensity candidates in the redshift range $0.55
description: 13 pages, 8 figures, submitted to MNRAS
Eclipsing binaries in the LMC: a wealth of data for astrophysical tests
Creators: name: Derekas, A.
name: Kiss, L. L.
name: Bedding, T. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We have analysed publicly available MACHO observations of 6833 variable stars in the Large Magellanic Cloud, classified as eclipsing binaries. After finding that a significant fraction of the sample was misclassified, we redetermined periods and variability class for all stars, producing a clean sample of 3031 eclipsing binaries. We have investigated their distribution in the period-color-luminosity space, which was used, for example, to assign a foreground probability to every object and establish new period-luminosity relations to selected types of eclipsing stars. We found that the orbital period distribution of LMC binaries is very similar to those of the SMC and the Milky Way. We have also determined the rate of period change for every star using the O-C method, discovering about 40 eclipsing binaries with apsidal motion, 45 systems with cyclic period changes and about 80 stars with parabolic O-C diagrams. In a few objects we discovered gradual amplitude variation, which can be explained by changes in the orbital inclination caused by a perturbing third body in the system.
description: 3 pages, 3 figures, to appear in the proceedings of IAU Symp. No. 240 'Binary Stars as Critical Tools and Tests in Contemporary Astrophysics' (Prague, 22-25 August 2006), Eds. W. Hartkopf, E. Guinan & P. Harmanec (Cambridge Univ. Press)
Σύγχρονη προσέγγιση του Συνδρόμου Sjögren:
Creators: name: Παναγιωτίδου, Θεοπίστη Σωτήριου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Σύνδρομο Sjögren
Αναδρομική μελέτη
Ro (SSA), La (SSB) αντισώματα
Sjögren syndrome
Retrospective study
anti Ro/SSA , anti La/SSB

description: Το Σύνδρομο Sjögren είναι μια χρόνια συστηματική αυτοάνοσης αιτιολογίας νόσος που χαρακτηρίζεται από χρόνια λεμφοκυτταρική διήθηση των εξωκρινών αδένων, κύρια δακρυϊκών και σιελογόνων. Η αιτιοπαθογένεσή του είναι άγνωστη. Ενοχοποιούνται γενετικοί και περιβαλλοντικοί παράγοντες. Κλινικά εκδηλώνεται ως ξηροφθαλμία και ξηροστομία, αλλά παρατηρούνται βλάβες και σε άλλα όργανα. Στους ασθενείς που πάσχουν από το σύνδρομο παρατηρείται 44 φορές μεγαλύτερη πιθανότητα ανάπτυξης κακοήθους λεμφώματος σε σύγκριση με το γενικό πληθυσμό. Εμφανίζεται μεγαλύτερη συχνότητα εμφάνισης στις γυναίκες και στα άτομα μεγαλύτερης ηλικίας. Για τη διάγνωσή του χρησιμοποιούνται κριτήρια που αναφέρονται τόσο στα υποκειμενικά ενοχλήματα των ασθενών όσο και σε δοκιμασίες κλινικές, ανοσολογικές και ιστοπαθολογικές. Η θεραπεία του συνδρόμου είναι συμπτωματική και στοχεύει στην ανακούφιση των ασθενών από τα συμπτώματα της ξηροστομίας και ξηροφθαλμίας. Μελετήσαμε τα ιστορικά 248 ασθενών με Πρωτοπαθές και Δευτεροπαθές Σύνδρομο Sjögren της Κλινικής της Στοματολογίας του Α.Π.Θ. και της Ρευματολογικής Κλινικής του Γενικού Νοσοκομείου Θεσσαλονίκης «Άγιος Παύλος» και αξιολογήθηκαν στοιχεία όπως το φύλο και η ηλικία, η κλινική εικόνα , η ιστοπαθολογική εικόνα, εργαστηριακά ευρήματα και η παρουσία υποκείμενης νόσου. Η αναλογία γυναικών-ανδρών βρέθηκε 15:1. Σε ποσοστό 91% των ασθενών η διάγνωση επιβεβαιώθηκε από την ιστοπαθολογική εικόνα, ενώ σε ποσοστό 56.45% τέθηκε η διάγνωση του Δευτεροπαθούς Συνδρόμου Sjögren.
description: Sjögren syndrome (SS) is a chronic systemic autoimmune disease that is characterized by lemphocytic infiltration of exocrine glands, mostly lacrimal and salivary. The exact causes of the disease still remain unknown. Certain genital and enviromental agents seem to play a major role. Xerophalmia (keratoconjunctivitis sicca) and xerostomia are the major clinical features of the disease, but,also, other organs can be affected. Patients with SS have a 44 times higher relative risk of lymphoma. SS occurs more commonly in women and in elderly. The diagnosis of SS is based on the criteria set by the American-European consensus committee. This criteria encompass the presence of subjective and objective sicca manifestations, antibodies to Ro/SSA and La/SSB antigens and characteristic histopathologic findings in minor salivary glands. Treatment of the disease is symptomatic. The clinical and laboratory data of 248 patients, diagnosed with primary or secondary SS by the Clinic of Stomatology of Aristotelio University of Thessaloniki and the Clinic of Rheumatology of “Agios Paulos” General Hospital of Thessaloniki, Greece, were analysed. Demographic data, such as gender and age and clinical features, serologic and laboratory findings were studied. The female:male ratio was 15:1. Lip biopsy was positive in 226 patients (91%). 141 (56.45%) were diagnosed with Secondary SS.
Το έθιμο των Καβαλάρηδων της Παναγίας και η διοργάνωση μοτοσικλετιστικών αγώνων στο Μικρόκαστρο Κοζάνης:
Creators: name: Πατσάκα, Βάια Λάζαρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Καβαλάρηδες
Μικρόκαστρο
Αγώνες μοτοσικλέτας
Horse riders
Mikrokastro
Motocross race

description: Η εργασία αυτή αναφέρεται σε μια συγκριτική παρουσίαση δύο τελετουργικών που λαμβάνουν χώρα στο Μικρόκαστρο Κοζάνης, το έθιμο των καβαλάρηδων της Παναγίας και τη διοργάνωση μοτοσικλετιστικών αγώνων. Η περιγραφή αυτών των τελετουργικών, ο τρόπος που λειτουργούν οι κοινωνικές ομάδες κατά τη διάρκεια τέλεσης τους, η ανίχνευση της σχέσης μεταξύ των αναβατών και του αλόγου ή της μηχανής τους αντίστοιχα είναι τα κύρια θέματα που αναπτύσσονται εδώ. Επίσης, γίνεται μια προσπάθεια προσέγγισης της χρήσης των όρων ‘παράδοση’ και ‘εκσυγχρονισμός’ από τα υποκείμενα της έρευνας μέσα στο κοινωνικό πλαίσιο που ερευνώνται. Στόχος αυτής της εργασίας είναι η κατάδειξη ομοιοτήτων και διαφοροποιητικών στοιχείων αυτών των δύο τελετουργικών που τελούνται στον ίδιο τόπο.
description: This thesis refers to a comparative presentation of two rituals taking place in Mikrokastro of Kozani. The custom of the Virgin Mary’s horse riders and the organization of the motocross race. The description of these rituals, the way these social groups act during the performance of the rituals, the detection of the relationship between the riders and their horses or motorcycles respectively, are the main issues developed here. Furthermore, an attempt is made to approach the usage of the terms “tradition” and “modernization” by the subjects of this research within the social context in which they are researched. The purpose of this thesis is to demonstrate the similarities and the differences between these two rituals that take place in the same area.
Near-bandgap wavelength-dependent studies of long-lived traveling coherent longitudinal acoustic phonon oscillations in GaSb/GaAs systems
Creators: name: Miller, J. K.
name: Qi, J.
name: Xu, Y.
name: Cho, Y. -J.
name: Liu, X.
name: Furdyna, J. K.
name: Perakis, I.
name: Shahbazyan, T. V.
name: Tolk, N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We report first studies of long-lived oscillations in optical pump-probe measurements on GaSb-GaAs heterostructures. The oscillations arise from a photogenerated coherent longitudinal acoustic phonon wave, which travels from the top surface of GaSb across the interface into the GaAs substrate, providing information on the optical properties of the material as a function of time/depth. Wavelength-dependent studies of the oscillations near the bandgap of GaAs indicate strong correlations to the optical properties of GaAs.
description: 11 pages, 4 figures
title: Klinisch-pathologischer Vergleich von idiopathischen und traumatischen Makulaforamina
Creators: name: Günther, Stefanie R
name: Vogt, D.
name: Hagenau, F.
name: Zaytseva, Y.
name: Wolf, A.
name: Priglinger, S.G.
name: Schumann, R.G.
Publisher: name: German Medical Science GMS Publishing House
Year: 2019
Subjects: subject: 610 Medical sciences; Medicine

description: Hintergrund: Ziel war es, Charakteristika der vitreomakulären Grenzzone traumatischer und idiopathischer Makulaforamina mittels Immunfluoreszenz und Eletronenmikroskopie zu vergleichen und mit klinischen Daten zu korrelieren. Material und Methoden: Für diese immunhistochemische und [zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 32. Jahrestagung der Retinologischen Gesellschaft
Το διαδίκτυο ως εργαλείο διδασκαλίας των Μαθηματικών στη δευτεροβάθμια εκπαίδευση:
Creators: name: Παπαδόπουλος, Κωνσταντίνος Γεώργιου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Μαθηματικά λογισμικά
Ψηφιακή τάξη
Υποδομή Διαδικτύου
Mathematics software
Digital class
Internet substructure

description: Το Διαδίκτυο και η τεράστια ανάπτυξη του, προσέδωσε απρόσμενη ώθηση σ’ όλες τις ανθρώπινες δραστηριότητες, ιδιαίτερα στις επιστήμες και στα Μαθηματικά. Ο σχεδιασμός και η ανάπτυξη της εκπαίδευσης και των Μαθηματικών, δεν μπορεί να γίνει χωρίς να ληφθεί υπ’ όψη το Διαδίκτυο. Παρουσιάζονται σ’ αυτή την εργασία οι υποδομές και η πορεία ανάπτυξης του Διαδικτύου. Δίνονται τα βασικά Μαθηματικά Λογισμικά και παρουσιάζονται μέσα από συγκεκριμένα παραδείγματα εφαρμογών τους, σημαντικές έννοιες από το Μαθηματικό κόσμο της Δευτεροβάθμιας Εκπαίδευσης. Γίνεται αναφορά στο λεγόμενο ¨Ψηφιακό Σχολείο¨ και στην πολύπλευρη κοινωνική Δικτύωση. Τέλος παρουσιάζονται συγκεκριμένα συμπεράσματα για το χώρο της Ελληνικής Μαθηματικής Εκπαίδευσης, παίρνοντας υπόψη την αντίστοιχη διεθνή εμπειρία.
description: Internet and its immense development lent an incredible impetus on all human activity and especially on sciences and mathematics. The planning and development of Education and Mathematics in particular, cannot be realistic without taking the Internet under consideration. This paper presents the internet infrastructure and its course of development in connection with mathematical education. The basic mathematics software is presented through specific examples of applications involving important concepts from the mathematical world of Secondary Education. The so-called ¨Digital School¨ is also mentioned as well as the many-sided social networks. Specific examples are presented on the ground of the learning of mathematics in Greece, taking under consideration the related international experience.
Μη συμμετρική μετάδοση τιμών ποιοτικά διαφοροποιημένων προϊόντων:
Creators: name: Μαργιόλα, Μαρία Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Μη συμμετρική μετάδοση τιμών
Ποιοτικά διαφοροποιημένα προϊόντα
Αγορά βοδινού κρέατος των Η.Π.Α.
Assymetric price transmission
Products that vary in quality
USA beef market

description: Η ύπαρξη μη συμμετρικής μετάδοσης των τιμών απορρέει κυρίως από την εφαρμογή μονοπωλιακών ή ολιγοπωλιακών τιμολογιακών πολιτικών. Οι αυξήσεις των τιμών απορροφούνται διαφορετικά από τις μειώσεις σε κάθε επίπεδο της αγοράς ζημιώνοντας ή ωφελώντας τους καταναλωτές και τις επιχειρήσεις. Η γνώση του τρόπου μετάδοσης των τιμών βοηθά στην κατανόηση της δομής των αγορών και αποτελεί ένα ισχυρό εργαλείο για χάραξη σωστής οικονομικής πολιτικής σε αγορές που λειτουργούν αναποτελεσματικά. Στην παρούσα εργασία διερευνήθηκε η ύπαρξη μη συμμετρικής μετάδοσης των τιμών ποιοτικά διαφοροποιημένων βοδινών τεμαχίων του κλάδου των Ηνωμένων Πολιτειών Αμερικής από το χονδρικό επίπεδο στο λιανικό επίπεδο. Αν και οι μεταβολές της χονδρικής τιμής τείνουν να προσαρμόζονται πλήρως στις λιανικές τιμές, οι μειωτικές μεταβολές της προσαρμόζονται προσωρινά με μεγαλύτερη ταχύτητα από τις αυξητικές. Η συμπεριφορά των τιμών απεικονίζει έναν κλάδο όπου οι χονδρέμποροι ασκούν τη μεγαλύτερη επιρροή, ενώ η ποιοτική διαφοροποίηση των κρεάτων δεν οδηγεί απαραίτητα σε συγκεκριμένη συμπεριφορά μετάδοσης των τιμών.
description: Asymmetric price transmission occurs due to monopolistic or oligopolistic pricing policies. The fact that price increases are absorbed differently compared to price decreases affects positively or negatively both consumers and companies. Knowledge of price transmission is important for the government because the more the structure of a failed market is made clear; the better economic policies are being set. In this thesis, asymmetric price transmission of USA beef products that vary in quality is examined from wholesale level to retail level. Although changes of wholesale prices are transmitted fully to retail prices; there is evidence of slower adjustment to wholesale price increases than to wholesale price decreases in the short run. The structure of the market shows that this price behavior is formed by wholesalers. No variation in the quality of beef products can lead to specific type of price transmission.
Xya changchunensis Cao & Yin & Yin 2024, sp. nov.
Creators: name: Cao, Cheng-Quan
name: Yin, Hai-Xiang
name: Yin, Zhan
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Tridactylidae
Xya
Xya changchunensis

description: Xya changchunensis sp. nov. Figs. 1–5, 10
Holotype ♂, paratypes ♀, Jilin, Changchun 43º13´N, 124º36´E, 2020-7-18, collected by Zi-bo Gao.
Male Head black without a yellow band along inner margin of eye. Width of vertex 1.7 times diameter of eye. Antennae black, 10 joints, length of third joint 1.8 times maximum width. Ocellus somewhat larger, placed near the lower margin of eye. Pronotum black, with a triangular white band on the lower margin. Fore wing black without yellow spot. Hind wing not reaching the base of epiproct. Fore leg black, femur with longitudinal yellow stripe, tibia yellow at apical part. Mid leg black, with yellow band at 2/3 part and apex. Hind femur black, without white spot on upper side. Hind tibia yellow, upper margin serration. Abdominal tergum black, and sternum black, with white band. Cercus and stylus dark. Epiproct black, with a longitudinal groove in the middle.
Female Body larger than the male. Width of vertex 1.9 times diameter of eye. Pronotum without two yellow sports near anterior margin. Hind wing longer, almost reaching the base of epiproct. Subgenital plate with longitudinal sulcus in the middle, its maximum width of 2.0 times length in ventral view. Other as same as the male.
Measurement (in mm): Length of body: ♂ 5.2, ♀ 6.4. Length of tegmina: ♂ 1.3, ♀ 1.5. Length of hind femora ♂ 3.0, ♀ 3.5.
Diagnosis. The new species is similar to Xya shandongensis Zhang et al, 2018. The major differences are listed in Table 1.
description: Published as part of Cao, Cheng-Quan, Yin, Hai-Xiang & Yin, Zhan, 2024, A new species of the genus Xya Latreille, 1809 from Jilin, China (Orthoptera, Tridctyloidea, Tridactylidae), pp. 141-145 in Zootaxa 5443 (1) on pages 141-143, DOI: 10.11646/zootaxa.5443.1.9, http://zenodo.org/record/10997162
Production of highly charged ions inside a cryogenic Penning trap by electron-impact ionisation
Creators: name: Kanika
name: Krishnan, A
name: Klimes, J W
name: Reich, B
name: Anjum, K K
name: Baus, P
name: Birkl, G
name: Quint, W
name: Vogel, M
Publisher: name: arXiv
Year: 2024
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We have built and operated a cryogenic Penning trap arrangement that allows for the efficient production, selection, and long-term storage of highly charged atomic ions. In close similarity to an electron-beam ion trap (EBIT) it works by electron-impact ionisation of atoms inside a dedicated confinement region. The electrons are produced by field emission at liquid-helium temperature and are subsequently accelerated to the keV energy range. The electron beam is reflected through the trap multiple times to increase the ionisation efficiency. We show a characterisation of the system and measurements with argon and tungsten ions up to Ar$^{16+}$ and W$^{27+}$, respectively.
description: 10 pages, 12 figures, published in Journal of Physics B: Atomic, Molecular and Optical Physics
New Two-Dimensional Integrable Quantum Models from SUSY Intertwining
Creators: name: Ioffe, M. V.
name: Negro, J.
name: Nieto, L. M.
name: Nishnianidze, D. N.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Supersymmetrical intertwining relations of second order in the derivatives are investigated for the case of supercharges with deformed hyperbolic metric $g_{ik}=diag(1,-a^2)$. Several classes of particular solutions of these relations are found. The corresponding Hamiltonians do not allow the conventional separation of variables, but they commute with symmetry operators of fourth order in momenta. For some of these models the specific SUSY procedure of separation of variables is applied.
description: 18 pages
Investigating the Fermi Large Area Telescope sensitivity of detecting the characteristics of the Galactic center excess
Creators: name: Di Mauro, Mattia
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The center of the Milky Way is offering one of the most striking mystery in Astroparticle Physics. An excess of gamma rays (GCE) has been measured by several groups in the data collected by the Fermi Large Area Telescope (LAT) towards the Galactic center region. The spectrum and spatial morphology of the GCE have been claimed by some groups to be compatible with a signal from the Galactic halo of dark matter (DM). Instead, other analyses have demonstrated that the GCE properties, e.g., its energy spectrum, highly depend on the choice of the Galactic interstellar emission (IEM) model source catalogs and analysis techniques. In this paper we investigate the sensitivity of Fermi-LAT to detect the characteristics of the GCE. In particular we simulate the GCE as given by DM and we verify that, with a perfect knowledge of the background components, its energy spectrum, position, spatial morphology and symmetry is properly measured. We also inspect two more realist cases for which there are imperfections in the IEM model. In the first we have an un-modeled gamma-ray source, constituted by the low-latitude component of the Fermi bubbles. In the second we simulate the data with one IEM template and analyze the data with an other. We verify that a mismodeling of the IEM introduces a systematics of about 10-15% in the GCE energy spectrum between 1-10 GeV and about 5% in the value of the slope for a NFW DM density profile, which is used to fit the GCE spatial morphology. Finally, we show how the GCE would be detected in case of alternative processes such as gamma-ray emission from a bulge population of pulsars or from electrons and positrons or protons injected from the Galactic center. We demonstrate that for each of these cases there is a distinctive smoking gun signature that would help to identify the real mechanism behind the origin of the GCE.
description: Accepted for publication in PRD. 20 pages and 20 figures
Black Hole Mergers from Star Clusters with Top-Heavy Initial Mass Functions
Creators: name: Weatherford, Newlin C.
name: Fragione, Giacomo
name: Kremer, Kyle
name: Chatterjee, Sourav
name: Ye, Claire S.
name: Rodriguez, Carl L.
name: Rasio, Frederic A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: Recent observations of globular clusters (GCs) provide evidence that the stellar initial mass function (IMF) may not be universal, suggesting specifically that the IMF grows increasingly top-heavy with decreasing metallicity and increasing gas density. Non-canonical IMFs can greatly affect the evolution of GCs, mainly because the high end determines how many black holes (BHs) form. Here we compute a new set of GC models, varying the IMF within observational uncertainties. We find that GCs with top-heavy IMFs lose most of their mass within a few Gyr through stellar winds and tidal stripping. Heating of the cluster through BH mass segregation greatly enhances this process. We show that, as they approach complete dissolution, GCs with top-heavy IMFs can evolve into 'dark clusters' consisting of mostly BHs by mass. In addition to producing more BHs, GCs with top-heavy IMFs also produce many more binary BH (BBH) mergers. Even though these clusters are short-lived, mergers of ejected BBHs continue at a rate comparable to, or greater than, what is found for long-lived GCs with canonical IMFs. Therefore these clusters, although they are no longer visible today, could still contribute significantly to the local BBH merger rate detectable by LIGO/Virgo, especially for sources with higher component masses well into the BH mass gap. We also report that one of our GC models with a top-heavy IMF produces dozens of intermediate-mass black holes (IMBHs) with masses $M>100\,{\rm M_\odot}$, including one with $M>500\,{\rm M_\odot}$. Ultimately, additional gravitational wave observations will provide strong constraints on the stellar IMF in old GCs and the formation of IMBHs at high redshift.
description: 8 pages, 4 figures, 1 table; accepted for publication to ApJL
Parameterized Beyond-Einstein Growth
Creators: name: Linder, Eric V.
name: Cahn, Robert N.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: A single parameter, the gravitational growth index γ, succeeds in characterizing the growth of density perturbations in the linear regime separately from the effects of the cosmic expansion. The parameter is restricted to a very narrow range for models of dark energy obeying the laws of general relativity but takes on distinctly different values in models of beyond-Einstein gravity. In analogy to the parameterized post-Newtonian (PPN) formalism for testing gravity, we extend and motivate the gravitational growth index, or Minimal Modified Gravity, approach to parameterizing beyond-Einstein cosmology. Using a simple analytic formalism, we show how the growth index parameter applies to early dark energy, time-varying gravity, DGP braneworld gravity, and scalar-tensor gravity.
description: 8 pages; v2 minor clarifications, matches published version
title: Unerwünschte Ereignisse nach Implantation des ARGUS-II-Netzhautstimulators
Creators: name: Lohmann, Dr. Tibor Karl
name: Schaffrath, K.
name: Schellhase, H.
name: Walter, P.
Publisher: name: German Medical Science GMS Publishing House
Year: 2019
Subjects: subject: 610 Medical sciences; Medicine

description: Hintergrund: Degenerative Netzhauterkrankungen, wie z.B. Retinitis pigmentosa führen im Krankheitsverlauf zu Einbußen des Sehens bis zur Erblindung. Bis heute ist die Behandlung dieser Erkrankungen limitiert und schwierig. Eine Therapieoption später Krankheitsstadien ist die Implantation[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 32. Jahrestagung der Retinologischen Gesellschaft
Valuing green space in the urban environment : applying and evaluating the SVR approach
Creators: name: Thomas, Karen M.
Publisher: name: University of British Columbia
Year: 2009

description: This thesis serves the following purposes: (1) to understand the importance of green space values, (2) to understand the importance of the use of values in the decision-making process, and (3) to employ and evaluate a technique called the structured value referendum to elicit values (including green space values) that are important in making a land use decision. Green space is any area that is predominantly undeveloped witJiin the urban environment. Although the importance of green space has been widely recognized since the 1960s, there still exists a limited appreciation for green space functions. The lack of comprehensive values incorporation that includes green space values in land use decision-making processes is a primary cause of green space loss. In order to understand the importance of green space loss and the lack of values incorporation in decision-making, a general concept of value is established. Development of a taxonomy exposes green space's economic, social, ecological, and sustainability values, and helps to underscore their importance in decisional settings. A general discussion on values elicitation reveals that their incorporation into decision-making processes can help set priorities, promote a better understanding of the issue, and lead to the development of more effective decisions. Despite these assets, inclusion of a comprehensive set of values rarely occurs in decision-making processes involving green space, and green space values are often ignored. There are, however, value elicitation techniques that can be used to account for green space values. One technique that has yet to be examined extensively for its effectiveness in aiding land use decision-making processes is the structured value referendum (SVR). The SVR is a voting-based structure that can elicit a full range of values. A literature review and case study evaluate the SVR. In the case study, a referendum based on a land use decision mvorving 100 acres in Richmond was designed and distributed to a random sample of200 voters. The results of the case study could aid Richmond public officials in making a decision for the best use of the land. This case study also reveals that the SVR approach is an effective and feasible means for eliciting values and aiding decision makers in making comprehensive land use decisions that involve green space.
Constraining $M_ν$ with the Bispectrum II: The Total Information Content of the Galaxy Bispectrum
Creators: name: Hahn, ChangHoon
name: Villaescusa-Navarro, Francisco
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Massive neutrinos suppress the growth of structure on small scales and leave an imprint on large-scale structure that can be measured to constrain their total mass, $M_ν$. With standard analyses of two-point clustering statistics, $M_ν$ constraints are severely limited by parameter degeneracies. Hahn et al.(2020) demonstrated that the bispectrum, the next higher-order statistic, can break these degeneracies and dramatically improve constraints on $M_ν$ and other cosmological parameters. In this paper, we present the constraining power of the redshift-space galaxy bispectrum, $B_0^g$. We construct the Molino suite of 75,000 mock galaxy catalogs from the Quijote $N$-body simulations using the halo occupation distribution (HOD) model, which provides a galaxy bias framework well-suited for simulation-based approaches. Using these mocks, we present Fisher matrix forecasts for $\{Ω_m,Ω_b,h,n_s,σ_8, M_ν\}$ and quantify, for the first time, the total information content of $B_0^g$ down to nonlinear scales. For $k_{\rm max}=0.5h/Mpc$, $B_0^g$ improves constraints on $Ω_m,Ω_b,h,n_s,σ_8$, and $M_ν$ by 2.8, 3.1, 3.8, 4.2, 4.2, and $4.6\times$ over the power spectrum, after marginalizing over HOD parameters. Even with priors from $Planck$, $B_0^g$ improves all of the cosmological constraints by $\gtrsim2\times$. In fact, for $P_\ell^g$ and $B_0^g$ out to $k_{\rm max}=0.5h/Mpc$ with $Planck$ priors, we achieve a $1σ$ $M_ν$ constraint of 0.048 eV, which is tighter than the current best cosmological constraint. While effects such as survey geometry and assembly bias will have an impact, these constraints are derived for $(1h^{-1}{\rm Gpc})^3$, a substantially smaller volume than upcoming surveys. Therefore, we conclude that the galaxy bispectrum will significantly improve cosmological constraints for upcoming galaxy surveys -- especially for $M_ν$.
description: 24 pages, 4 figures, the Molino catalog is publicly available at https://changhoonhahn.github.io/molino/
Forecasting Solar Wind Speeds
Creators: name: Suzuki, Takeru K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: By explicitly taking into account effects of Alfven waves, I derive from a simple energetics argument a fundamental relation which predicts solar wind (SW) speeds in the vicinity of the earth from physical properties on the sun. Kojima et al. recently found from their observations that a ratio of surface magnetic field strength to an expansion factor of open magnetic flux tubes is a good indicator of the SW speed. I show by using the derived relation that this nice correlation is an evidence of the Alfven wave which accelerates SW in expanding flux tubes. The observations further require that fluctuation amplitudes of magnetic field lines at the surface should be almost universal in different coronal holes, which needs to be tested by future observations.
description: 5 pages, 2 figures embedded, ApJL, in press
Gauss-Bonnet black holes supporting massive scalar field configurations: The large-mass regime
Creators: name: Hod, Shahar
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It has recently been demonstrated that black holes with spatially regular horizons can support external scalar fields (scalar hairy configurations) which are non-minimally coupled to the Gauss-Bonnet invariant of the curved spacetime. The composed black-hole-scalar-field system is characterized by a critical existence line $α=α(μr_{\text{H}})$ which, for a given mass of the supported scalar field, marks the threshold for the onset of the spontaneous scalarization phenomenon [here $\{α,μ,r_{\text{H}}\}$ are respectively the dimensionless non-minimal coupling parameter of the field theory, the proper mass of the scalar field, and the horizon radius of the central supporting black hole]. In the present paper we use analytical techniques in order to explore the physical and mathematical properties of the marginally-stable composed black-hole-linearized-scalar-field configurations in the eikonal regime $μr_{\text{H}}\gg1$ of large field masses. In particular, we derive a remarkably compact analytical formula for the critical existence-line $α=α(μr_{\text{H}})$ of the system which separates bare Schwarzschild black-hole spacetimes from composed hairy (scalarized) black-hole-field configurations.
description: 5 pages