cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Spectroscopy of Rb$_{2}$ dimers in solid $^{4}$He
Creators: name: Moroshkin, P.
name: Hofer, A.
name: Ulzega, S.
name: weis, A.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: We present experimental and theoretical studies of the absorption, emission and photodissociation spectra of Rb$_{2}$ molecules in solid helium. We have identified 11 absorption bands of Rb$_{2}$. All laser-excited molecular states are quenched by the interaction with the He matrix. The quenching results in efficient population of a metastable (1)$^{3}Π_{u}$ state, which emits fluorescence at 1042 nm. In order to explain the fluorescence at the forbidden transition and its time dependence we propose a new molecular exciplex Rb$_{2}(^{3}Π_{u})$He$_{2}$. We have also found evidence for the formation of diatomic bubble states following photodissociation of Rb$_{2}$.
The Galactic cosmic ray intensity at the evolving Earth and young exoplanets
Creators: name: Rodgers-Lee, D.
name: Vidotto, A. A.
name: Taylor, A. M.
name: Rimmer, P. B.
name: Downes, T. P.
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: Cosmic rays may have contributed to the start of life on Earth. Here, we investigate the evolution of the Galactic cosmic ray spectrum at Earth from ages $t = 0.6-6.0\,$Gyr. We use a 1D cosmic ray transport model and a 1.5D stellar wind model to derive the evolving wind properties of a solar-type star. At $t=1\,$Gyr, approximately when life is thought to have begun on Earth, we find that the intensity of $\sim$GeV Galactic cosmic rays would have been $\sim10$ times smaller than the present-day value. At lower kinetic energies, Galactic cosmic ray modulation would have been even more severe. More generally, we find that the differential intensity of low energy Galactic cosmic rays decreases at younger ages and is well described by a broken power-law in solar rotation rate. We provide an analytic formula of our Galactic cosmic ray spectra at Earth's orbit for different ages. Our model is also applicable to other solar-type stars with exoplanets orbiting at different radii. Specifically, we use our Galactic cosmic ray spectrum at 20$\,$au for $t=600\,$Myr to estimate the penetration of cosmic rays in the atmosphere of HR$\,$2562b, a directly imaged exoplanet orbiting a young solar-type star. We find that the majority of particles $<0.1$GeV are attenuated at pressures $\gtrsim10^{-5}\,$bar and thus do not reach altitudes below $\sim100\,$km. Observationally constraining the Galactic cosmic ray spectrum in the atmosphere of a warm Jupiter would in turn help constrain the flux of cosmic rays reaching young Earth-like exoplanets.
description: 15 pages, 10 figures, accepted for publication in MNRAS
Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars
Creators: name: Wright, J. T.
name: Marcy, G. W.
name: Fischer, D. A.
name: Butler, R. P.
name: Vogt, S. S.
name: Tinney, C. G.
name: Jones, H. R. A.
name: Carter, B. D.
name: Johnson, J. A.
name: McCarthy, C.
name: Apps, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present four new exoplanets: HIP 14810 b & c, HD 154345 b, and HD 187123 c. The two planets orbiting HIP 14810, from the N2K project, have masses of 3.9 and 0.76 M_jup. We have searched the radial velocity time series of 90 known exoplanet systems and found new residual trends due to additional, long period companions. Two stars known to host one exoplanet have sufficient curvature in the residuals to a one planet fit to constrain the minimum mass of the outer companion to be substellar: HD 68988 c with 8 M_jup < M sini < 20 M_jup and HD 187123 c with 3 M_jup < msini < 7 M_jup$, both with P > 8 y. We have also searched the velocity residuals of known exoplanet systems for prospective low-amplitude exoplanets and present some candidates. We discuss techniques for constraining the mass and period of exoplanets in such cases, and for quantifying the significance of weak RV signals. We also present two substellar companions with incomplete orbits and periods longer than 8 y: HD 24040 b and HD 154345 b with M sini < 20 M_jup and M sini < 10 M_jup, respectively.
description: Accepted to ApJ, v656(2), 20 Feb 2007. 15 figures, 6 tables v.2, v.3: minor typos from corrected
title: Ein neuer Sehwahrnehmungsmodus: 3D-„Heads Up“-Chirurgie?
Creators: name: Or, Kazim Hilmi
Publisher: name: German Medical Science GMS Publishing House
Year: 2019
Subjects: subject: 610 Medical sciences; Medicine

description: Hintergrund: Die neue Heads Up 3D-Chirurgie (HU3DC) ist eine neue Imaging- und Betrachtungstechnologie für chirurgische Eingriffe im Gegensatz zum herkömmlichen Operationsmikroskop (COM), ohne durch die Okulare des Mikroskops zu blicken. Es ist ein neuer visueller Wahrnehmungsmodus. Es ist[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 32. Jahrestagung der Retinologischen Gesellschaft
Classification of interacting Floquet phases with $U(1)$ symmetry in two dimensions
Creators: name: Zhang, Carolyn
name: Levin, Michael
Publisher: name: arXiv
Year: 2020
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We derive a complete classification of Floquet phases of interacting bosons and fermions with $U(1)$ symmetry in two spatial dimensions. According to our classification, there is a one-to-one correspondence between these Floquet phases and rational functions $π(z) = a(z)/b(z)$ where $a(z)$ and $b(z)$ are polynomials obeying certain conditions and $z$ is a formal parameter. The physical meaning of $π(z)$ involves the stroboscopic edge dynamics of the corresponding Floquet system: in the case of bosonic systems, $π(z) = \frac{p}{q} \cdot \tildeπ(z)$ where $\frac{p}{q}$ is a rational number which characterizes the flow of quantum information at the edge during each driving period, and $\tildeπ(z)$ is a rational function which characterizes the flow of $U(1)$ charge at the edge. A similar decomposition exists in the fermionic case. We also show that $\tildeπ(z)$ is directly related to the time-averaged $U(1)$ current that flows in a particular geometry. This $U(1)$ current is a generalization of the quantized current and quantized magnetization density found in previous studies of non-interacting fermionic Floquet phases.
title: Phako-Vitrektomie: Refraktionsergebnisse und Verbesserungspotenzial
Creators: name: Hellermann, Melanie
name: Bopp, S.
Publisher: name: German Medical Science GMS Publishing House
Year: 2019
Subjects: subject: 610 Medical sciences; Medicine

description: Die kombinierte Phako-Vitrektomie mit IOL-Implantation ist inzwischen zu einem etablierten Verfahren geworden. Für den Behandlungserfolg und die Patientenzufriedenheit ist die Realisierung des angestrebten refraktiven Ergebnisses von großer Bedeutung. Refraktive Überraschungen und ein[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 32. Jahrestagung der Retinologischen Gesellschaft
Examining the Geometrical Model with Inverted Mass Hierarchy for Neutrinos
Creators: name: Honda, Mizue
name: Tanimoto, Morimitsu
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The comprehensive analyses are presented in the model with the inverted mass hierarchy for neutrinos, which follows from a geometrical structure of a (1+5) dimensional space-time where two extra dimensions are compactified on the T^2/Z_3 orbifold. The model gives two large lepton flavor mixings due to the S3 structure in the (1+5) dimensional space-time. It also predicts the lightest neutrino mass as m_3=(1-50)\times 10^{-5}eV and the effective neutrino mass responsible for neutrinoless double beta decays as _{ee}\simeq 50 meV. The low energy CP violation, J_{CP} could be 0.02. On the other hand, the observed baryon asymmetry in the present universe is produced by the non-thermal leptogenesis, which works even at the reheating temperature TR=10^{4}-10^{6}GeV. The correlation between the baryon asymmetry and the low energy CP violation is examined in this model.
description: 17 pages, 10 figures, a reference is added, minor change in introduction
Μαθηματικές έννοιες ως διδακτικοί μετασχηματισμοί της Επιστήμης του Διαδικτύου:
Creators: name: Τσιώτας, Δημήτριος Κωνσταντίνου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Επιστήμη του Διαδικτύου
Διδακτική
Μαθηματικές έννοιες
Web Science
Didactics
Μathematic significances

description: Η Επιστήμη του Διαδικτύου (ΕτΔ) αποτελεί νεοσύστατη επιστήμη με ευρύ πεδίο έρευνας και μελέτης. Η ιδιομορφία της έγκειται στο γεγονός ότι έχει πολυτομεακό χαρακτήρα και πλούσια θεματολογία, προερχόμενη από την Πληροφορική, τα Μαθηματικά, την Κοινωνιολογία, την Ψυχολογία, την Τεχνητή Νοημοσύνη, τη Νομική, τα Οικονομικά, την Οικολογία κ.ά. (Βαφόπουλος και Μητακίδης, 2008). Επίσης, το αντικείμενο της ΕτΔ, το διαδίκτυο, είναι πλέον πολύ προσιτό σε κάθε άνθρωπο από όλες τις βαθμίδες της εκπαιδευτικής διαστρωμάτωσης. Η παρούσα εργασία καταδεικνύει, αρχικά, την ανάγκη σύστασης εκπαιδευτικού υλικού για την ΕτΔ στην ελληνική δευτεροβάθμια εκπαίδευση, ώστε ο μαθητής να μη διαχειρίζεται χωρίς γνωστικά εφόδια, τόσο από τεχνικής όσο και από ποιοτικής και ηθικής πλευράς, το διαδίκτυο. Στο βασικό της μέρος η εργασία, έπειτα από μελέτη του διδακτικού υλικού των Μαθηματικών στην ελληνική δευτεροβάθμια εκπαίδευση, αναδεικνύει τις μαθηματικές έννοιες οι οποίες συμβάλλουν στην κατανόηση της διδασκαλίας της ΕτΔ και δύνανται, περαιτέρω, να αξιοποιηθούν ως διδακτικό υλικό για τη νεοεισαχθείσα αυτή Επιστήμη.
description: Web Science (WS) constitutes a newly established science with a wide field of research and study. Her peculiarity lies in the fact that it has a multisector character and a voluminous universe of issues, derived from the Computer Science, the Mathematics, the Sociology, the Psychology, the Artificial Intelligence, the Law, the Finances, Ecology e.t.c. (Vafopoulos and Mitakides, 2008). Also, the object of WS, the internet, is henceforth very accessible in each person of all rungs of educational stratification. The present work shows, initially, the need of constituting an educational material for the WS in the Greek secondary education, so that the student does not have to manage the Web without cognitive supplies, concerning technical, qualitative and moral side. In the basic part, the present work, after a study of the instructive material in Mathematics of the Greek secondary education, indicates those mathematic significances that contributes in the WS teaching comprehension and they are able, further, to be developed as an instructive material for the WS.
Forced Imbibition in Stratified Porous Media
Creators: name: Lu, Nancy B.
name: Pahlavan, Amir A.
name: Browne, Christopher A.
name: Amchin, Daniel B.
name: Stone, Howard A.
name: Datta, Sujit S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: Imbibition plays a central role in diverse energy, environmental, and industrial processes. In many cases, the medium has multiple parallel strata of different permeabilities; however, how this stratification impacts imbibition is poorly understood. We address this gap in knowledge by directly visualizing forced imbibition in three-dimensional (3D) porous media with two parallel strata. We find that imbibition is spatially heterogeneous: for small capillary number Ca, the wetting fluid preferentially invades the fine stratum, while for Ca above a threshold value, the fluid instead preferentially invades the coarse stratum. This threshold value depends on the medium geometry, the fluid properties, and the presence of residual wetting films in the pore space. These findings are well described by a linear stability analysis that incorporates crossflow between the strata. Thus, our work provides quantitative guidelines for predicting and controlling flow in stratified porous media.
description: In press
Confluence Theory for Graphs
Creators: name: Sikora, Adam S.
name: Westbury, Bruce W.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Algebra (math.QA)
subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57M15, 57M27, 05C10, 16S15

description: We develop a theory of confluence of graphs. We describe an algorithm for proving that a given system of reduction rules for abstract graphs and graphs in surfaces is locally confluent. We apply this algorithm to show that each simple Lie algebra of rank at most 2, gives rise to a confluent system of reduction rules of graphs (via Kuperberg's spiders) in an arbitrary surface. As a further consequence of this result, we find canonical bases of SU_3-skein modules of cylinders over orientable surfaces.
description: 34 pages, 218 figures
Exploring Foundations of Time-Independent Density Functional Theory for Excited-States
Creators: name: Samal, Prasanjit
name: Harbola, Manoj K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Based on the work of Gorling and that of Levy and Nagy, density-functional formalism for many Fermionic excited-states is explored through a careful and rigorous analysis of the excited-state density to external potential mapping. It is shown that the knowledge of the ground-state density is a must to fix the mapping from an excited-state density to the external potential. This is the excited-state counterpart of the Hohenberg-Kohn theorem, where instead of the ground-state density the density of the excited-state gives the true many-body wavefunctions of the system. Further, the excited-state Kohn-Sham system is defined by comparing it's non-interacting kinetic energy with the true kinetic energy. The theory is demonstrated by studying a large number of atomic systems.
description: submitted to J. Chem. Phys
Μελέτη δεικτών ηπατίτιδας Β σε δείγμα πληθυσμού στρατιωτικού προσωπικού:
Creators: name: Αγοραστάκης, Οδυσσέας Ιωάννη
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Ηπατίτιδα Β
Ορολογικοί δείκτες ανοσιακή κάλυψη
Στρατιωτικό προσωπικό
Hepatitis B
Serological indices immune coverage
Military personnel

description: Στις αρχές του 2007 πραγματοποιήθηκε μια μελέτη ορο-επιπολασμού χρονικής στιγμής (sero-prevalence survey) με σκοπό την εκτίμηση των ορολογικών δεικτών ανοσιακής κάλυψης έναντι της ηπατίτιδας Β σε στρατιωτικό προσωπικό. Ελήφθη φλεβικό αίμα από 284 άρρενες, το σύνολο του μόνιμου προσωπικού ενός Τάγματος που επρόκειτο να συμμετάσχει στην Ελληνική Δύναμη κάποιας ειρηνευτικής αποστολής στο εξωτερικό και κατόπιν φυγοκέντρησης προσδιορίσθηκαν οι δείκτες HBsAg, anti-HBs, και anti-HBc με τη μέθοδο Microparticle Enzyme Immunoassay (MEIA). Βρήκαμε πως 183 εκ των συμμετεχόντων, το 64.4% (95% ΔΕ, 59.1 – 69.9%) του πληθυσμού μας, διέθετε προστατευτικούς τίτλους αντισωμάτων anti-HBs που επάχθησαν από εμβολιασμό, ενώ 101 άτομα, το 35.6%, ήταν ανεμβολίαστα. Προκειμένου να διερευνηθεί η υπόθεση κατά πόσο υπάρχει διαφορά στην ανοσιακή κάλυψη μεταξύ των ατόμων διαφορετικών ηλικιακών ομάδων πραγματοποιήσαμε την χ2 δοκιμασία η οποία δεν ανέδειξε στατιστικά σημαντική διαφορά στον επιπολασμό του anti-HBs μεταξύ των ηλικιών.
description: In the beginning of 2007 a cross sectional sero-prevalence survey was conducted in order to assess the serological indices of immune coverage against Hepatitis B among permanent military personnel in Greece. Serum samples were taken from 284 males, the whole force of a battalion that was to be deployed in a mission abroad. After centrifugation each serum was tested for HBsAg, anti-HBs and anti-HBc, using the Microparticle Enzyme Immunoassay (MEIA) method. 183 of the participants, 64.4% (95% CI, 59.1 – 69.9%), were found to have protective titers of anti-HBs that were induced by vaccination, while 101 individuals, 35.6%, were unvaccinated. For the investigation of the assumption as to whether there is difference in the immune coverage among individuals of different age groups, we performed the chi-square test which did not reveal statistically significant difference.
Numerical extraction of de Haas - van Alphen frequencies from calculated band energies
Creators: name: Rourke, P. M. C.
name: Julian, S. R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: A new algorithm for extracting de Haas-van Alphen frequencies and effective masses from calculated band energies is presented. The algorithm creates an interpolated k-space "super cell," which is broken into slices perpendicular to the desired magnetic field direction. Fermi surface orbits are located within each slice, and de Haas-van Alphen frequencies and effective masses are calculated. Orbits are then matched across slices, and extremal orbits determined. This technique has been successful in locating extremal orbits not previously noticed in the complicated topology of existing UPt3 band-structure data; these new orbits agree with experimental de Haas-van Alphen measurements on this material, and solidify the case for a fully-itinerant model of UPt3.
description: 21 pages, 7 figures, updated after publication in Computer Physics Communications, includes download link to algorithm source code
Extending the view of ArH+ chemistry in diffuse clouds
Creators: name: Jacob, Arshia M.
name: Menten, Karl M.
name: Wyrowski, Friedrich
name: Winkel, Benjamin
name: Neufeld, David A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: One of the surprises of the Herschel mission was the detection of ArH+ towards the Crab Nebula in emission and in absorption towards strong Galactic background sources. Although these detections were limited to the first quadrant of the Galaxy, the existing data suggest that ArH+ ubiquitously and exclusively probes the diffuse atomic regions of the ISM. In this study, we extend the coverage of ArH+ to other parts of the Galaxy with new observations of its J = 1-0 transition along seven Galactic sight lines towards bright sub-mm continuum sources. We aim to benchmark its efficiency as a tracer of purely atomic gas by evaluating its correlation (or lack there of) with other well-known atomic and molecular gas tracers. The observations of ArH+ near 617.5 GHz were made feasible with the new, sensitive SEPIA660 receiver on the APEX 12 m telescope. The two sidebands of this receiver allowed us to observe p-H2O+ transitions of at 607.227 GHz simultaneously with the ArH+ line. By analysing the steady state chemistry of OH+ and o-H2O+, we derive on average a cosmic-ray ionisation rate (CRIR), of 2.3e-16 s^-1 towards the sight lines studied in this work. Using the derived values of the CRIR and the observed ArH+ abundances we constrain the molecular fraction of the gas traced by ArH+ to lie below 2e-2 with a median value of 8.8e-4. Combined, our observations of ArH+, OH+, H2O+, and CH probe different regimes of the ISM, from diffuse atomic to diffuse and translucent molecular clouds. Over Galactic scales, we see that the distribution of N(ArH+) is associated with that of N(H), particularly in the inner Galaxy with potentially even contributions from the warm neutral medium phase of atomic gas at larger galactocentric distances. We derive an average o/p-ratio for H2O+ of 2.1, which corresponds to a nuclear spin temperature of 41 K, consistent with the typical gas temperatures of diffuse clouds.
description: Accepted for publication in Astronomy & Astrophysics (24 pages, 30 figures)
A Multi-Resolution Frontier-Based Planner for Autonomous 3D Exploration
Creators: name: Batinović, Ana
name: Petrović, Tamara
name: Ivanovic, Antun
name: Petric, Frano
name: Bogdan, Stjepan
Publisher: name: arXiv
Year: 2020
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: In this paper we propose a planner for 3D exploration that is suitable for applications using state-of-the-art 3D sensors such as lidars, which produce large point clouds with each scan. The planner is based on the detection of a frontier - a boundary between the explored and unknown part of the environment - and consists of the algorithm for detecting frontier points, followed by clustering of frontier points and selecting the best frontier point to be explored. Compared to existing frontier-based approaches, the planner is more scalable, i.e. it requires less time for the same data set size while ensuring similar exploration time. Performance is achieved by not relying on data obtained directly from the 3D sensor, but on data obtained by a mapping algorithm. In order to cluster the frontier points, we use the properties of the Octree environment representation, which allows easy analysis with different resolutions. The planner is tested in the simulation environment and in an outdoor test area with a UAV equipped with a lidar sensor. The results show the advantages of the approach.
Η αξιοποίηση των παραπροϊόντων της ηλεκτρολυτικής επεξεργασίας του πυρολουσίτη για σκοπούς αποκατάστασης της βλάστησης σε διαταραγμένα εδάφη:
Creators: name: Βρεττάκης, Γεώργιος Αλέξανδρου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Μαγγάνιο
Φυτοαπορρύπανση
Κυπαρίσσι το αειθαλές
Manganese
Phytoremediation
Cypressus sempervirens

description: Το ζήτημα της αποκατάστασης περιοχών που δέχονται παραπροϊόντα, από εξορυκτικές και βιομηχανικές διαδικασίες, με την μέθοδο της φυτοαπορρύπανσης, είναι μια νέα πολλά υποσχόμενη τεχνολογία. Με την παρούσα έρευνα γίνεται μια προσπάθεια να μελετηθεί το παραπροϊόν που παράγεται από την ηλεκτρολυτική επεξεργασία πυρολουσίτη (MnO2), ως εδαφοβελτιωτικού, σε μείξη με έδαφος και άλλα υλικά. Χρησιμοποιήθηκε το αειθαλές κυπαρίσσι (cupressus sempervirens) και μελετήθηκε η συμπεριφορά του υπέργειου και του ριζικού του συστήματος, καθώς και η χημική τους σύνθεση. Από τα αποτελέσματα φάνηκε ότι το κυπαρίσσι, κάτω από ορισμένες προϋποθέσεις, μπορεί να αποκαταστήσει τις λειτουργίες του εδάφους. Το παραπροϊόν επίσης φάνηκε ότι μπορεί να χρησιμοποιηθεί, με κατάλληλη μείξη με άλλα υλικά, ως υπόθεμα για την ανάπτυξη φυτών.
description: The phytoremediation of contaminated sites, due to mining activities and industrial processes, is a promising new technology. In this research, is studied the byproduct of the electrolytic process of pyrolusite (MnO2), as a soil enhancer, mixed with soil and other materials. It has been studied the cupressus sempervirens’ shoot, root and their chemical analysis. Our conclusion is that cupressus sempervirens has the potential, under certain circumstances, for remediation of contaminated soils. In addition the byproduct mixed with other materials, seemed that can be used as a soil substitute for plant growth.
title: 25-Gauge Vitrektomie in der Makulachirurgie mit und ohne kombinierter Phakoemulsifikation und Kunstlinsenimplantation
Creators: name: Grajewski, Luise
name: Carstens, J.
name: Krause, L.
Publisher: name: German Medical Science GMS Publishing House
Year: 2019
Subjects: subject: 610 Medical sciences; Medicine

description: Mit den in den letzten Jahren immer weiterentwickelten Operationsmethoden ist die Makulachirurgie ein zunehmend atraumatischer Eingriff für das Auge geworden. Bei Patienten mit zusätzlicher Linsentrübung bietet sich ein einzeitiges Verfahren mit kombinierter Katarakt- Operation an. Ziel[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 32. Jahrestagung der Retinologischen Gesellschaft
HARNESSING BIG DATA AND STATISTICAL ANALYTICS TO UNCOVER HIDDEN PATTERNS AND INSIGHTS WITHIN COMPLEX FINANCIAL REPORTING SYSTEMS
Creators: name: Jerryson Ameworgbe Gidisu, Mbonigaba Celestin, Rachaelina Etornam Dometi & Pauline Riane Adu-Henaku
Publisher: name: Zenodo
Year: 2025

description: This study explores the integration of big data and statistical analytics in financial reporting systems to uncover hidden patterns and enhance financial decision-making. The primary objective is to examine how statistical techniques such as regression analysis, chi-square tests, and time series analysis improve transparency, accuracy, and fraud detection. Using a mixed-methods approach, quantitative data from financial reports (2020-2024) and qualitative insights from industry experts were analyzed. The results indicate a significant correlation (r = 0.87, p < 0.001) between investment in big data analytics and reporting accuracy, with regression analysis (R² = 0.82) showing that a $5M increase in data investments enhances financial accuracy by 3%. The chi-square test (χ² = 45.63, p < 0.001) confirms that improved data integration raises fraud detection rates from 78% to 96%, while time series analysis highlights a 520% surge in financial transactions over the study period. These findings demonstrate the critical role of predictive analytics in streamlining financial reporting. The study concludes that leveraging big data analytics enhances financial integrity, minimizes errors, and strengthens fraud detection. To maximize these benefits, financial institutions should invest in standardized data governance, explainable AI models, and cyber security measures while fostering data literacy through continuous training.
title: Makulopathien bei Myopia magna operieren oder lieber lassen?
Creators: name: Schmidt, Jörg Christian
Publisher: name: German Medical Science GMS Publishing House
Year: 2019
Subjects: subject: 610 Medical sciences; Medicine

description: Hintergrund: Patienten mit hoher Myopie entwickeln vereinzelt ausgeprägte Makulabefunde, wie Makulatraktion, epiretinale Gliosen und zentrale Makulaschisis mit subjektiv zunehmenden Beschwerden. Exzessive Bulbuslängen mit entsprechenden zentralen Veränderungen wie Staphylom und Pigmentatrophie[zum vollständigen Text gelangen Sie über die oben angegebene URL]
description: 32. Jahrestagung der Retinologischen Gesellschaft
Near-wall velocity measurements by Particle-Shadow-Tracking
Creators: name: Lancien, Pierre
name: Lajeunesse, Eric
name: Métivier, François
Publisher: name: arXiv
Year: 2007
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We report a new method to measure the velocity of a fluid in the vicinity of a wall. The method, that we call Particle-Shadow Tracking (PST), simply consists in seeding the fluid with a small number of fine tracer particles of density close to that of the fluid. The position of each particle and of its shadow on the wall are then tracked simultaneously, allowing one to accurately determine the distance separating tracers from the wall and therefore to extract the velocity field. We present an application of the method to the determination of the velocity profile inside a laminar density current flowing along an inclined plane.
THE ROLE OF COMMUNICATION SERVICES IN THE NATIONAL AND WORLD ECONOMY
Creators: name: Allayorov Kh.I. independent researcher of SamIES
Publisher: name: Zenodo
Year: 2024

description: In this article, the opportunities of communication services in our country today and its place in the world market, the importance of communication services in the national and world economy, the stages of development of national communication services are highlighted by the author.

Key words: communication services, world economy, communication models, service delivery areas
Discrete Scale Relativity
Creators: name: Oldershaw, R. L.
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: The possibility that global discrete dilation invariance is a fundamental symmetry principle of nature is explored. If the discrete self-similarity observed in nature is exact, then the Principle of General Covariance needs to be broadened in order to accommodate this form of discrete conformal invariance, and a further generalization of relativity theory is required.
description: 9 pages, minor revisions, accepted at Astrophys. Space Sci., comments welcome
Disorder-induced magnetic memory: Experiments and theories
Creators: name: Pierce, M. S.
name: Buechler, C. R.
name: Sorensen, L. B.
name: Kevan, S. D.
name: Jagla, E. A.
name: Deutsch, J. M.
name: Mai, T.
name: Narayan, O.
name: Davies, J. E.
name: Liu, Kai
name: Zimanyi, G. T.
name: Katzgraber, H. G.
name: Hellwig, O.
name: Fullerton, E. E.
name: Fischer, P.
name: Kortright, J. B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Beautiful theories of magnetic hysteresis based on random microscopic disorder have been developed over the past ten years. Our goal was to directly compare these theories with precise experiments. We first developed and then applied coherent x-ray speckle metrology to a series of thin multilayer perpendicular magnetic materials. To directly observe the effects of disorder, we deliberately introduced increasing degrees of disorder into our films. We used coherent x-rays to generate highly speckled magnetic scattering patterns. The apparently random arrangement of the speckles is due to the exact configuration of the magnetic domains in the sample. In effect, each speckle pattern acts as a unique fingerprint for the magnetic domain configuration. Small changes in the domain structure change the speckles, and comparison of the different speckle patterns provides a quantitative determination of how much the domain structure has changed. How is the magnetic domain configuration at one point on the major hysteresis loop related to the configurations at the same point on the loop during subsequent cycles? The microscopic return-point memory(RPM) is partial and imperfect in the disordered samples, and completely absent when the disorder was not present. We found the complementary-point memory(CPM) is also partial and imperfect in the disordered samples and completely absent when the disorder was not present. We found that the RPM is always a little larger than the CPM. We also studied the correlations between the domains within a single ascending or descending loop. We developed new theoretical models that do fit our experiments.
description: 26 pages, 25 figures, Accepted by Physical Review B 01/25/07
The discovery of the most UV-Lya luminous star-forming galaxy: a young, dust- and metal-poor starburst with QSO-like luminosities
Creators: name: Marques-Chaves, R.
name: Alvarez-Marquez, J.
name: Colina, L.
name: Perez-Fournon, I.
name: Schaerer, D.
name: Vecchia, C. Dalla
name: Hashimoto, T.
name: Jimenez-Angel, C.
name: Shu, Y.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the discovery of BOSS-EUVLG1 at z=2.469, by far the most luminous, almost un-obscured star-forming galaxy known at any redshift. First classified as a QSO within the Baryon Oscillation Spectroscopic Survey, follow-up observations with the Gran Telescopio Canarias reveal that its large luminosity, MUV = -24.40 and log(L_Lya/erg s-1) = 44.0, is due to an intense burst of star-formation, and not to an AGN or gravitational lensing. BOSS-EUVLG1 is a compact (reff = 1.2 kpc), young (4-5 Myr) starburst with a stellar mass log(M*/Msun) = 10.0 +/- 0.1 and a prodigious star formation rate of ~1000 Msun yr-1. However, it is metal- and dust-poor (12+log(O/H) = 8.13 +/- 0.19, E(B-V) = 0.07, log(LIR/LUV) < -1.2), indicating that we are witnessing the very early phase of an intense starburst that has had no time to enrich the ISM. BOSS-EUVLG1 might represent a short-lived (<100 Myrs), yet important phase of star-forming galaxies at high redshift that has been missed in previous surveys. Within a galaxy evolutionary scheme, BOSS-EUVLG1 could likely represent the very initial phases in the evolution of massive quiescent galaxies, even before the dusty star-forming phase.
description: 6 pages, 3 figures, 1 table. Accepted for publication in MNRAS Letters
Cooperative learning strategies for teaching undergraduate tonal theory
Creators: name: Ollen, Joy Elaine
Publisher: name: University of British Columbia
Year: 2009

description: The purpose of this thesis was to show that cooperative learning strategies are suitable teaching techniques for the instruction of undergraduate music theory. Literature in music theory pedagogy has concentrated primarily on content-based teaching issues and offers little information on the range of teaching techniques available for promoting student learning. Many instructors may be relying on traditional teaching methods with which they are familiar-lectures, lecture-demonstrations and teacher-led discussions-to instruct tonal theory classes and may not be aware of cooperative learning or its potential usefulness as another instructional strategy. The body of this thesis is divided into three main sections. The opening section demonstrates how traditional teaching methods alone fail to meet many learning needs of students and points to cooperative learning strategies as one alternative method that addresses these needs. In the next section, cooperative learning is further defined in order to differentiate it from traditional group work. The third and largest section contains ten sample lesson plans based on topics central to first- and second-year tonal harmony courses. Each lesson includes at least one cooperative learning technique and a discussion of why the particular technique was applied to the topic. Instructors of tonal harmony who are looking for additional teaching strategies that actively involve the learners should consider using cooperative learning. The sample lesson plans offered in this thesis illustrate how these techniques may be used either briefly in conjunction with more traditional methods or on their own in more extensive activities. Variety within cooperative learning strategies has also been demonstrated by providing techniques ranging from simple, user-friendly ideas for the inexperienced, to more complex and challenging activities requiring higher levels of experience and collaborative skills. A selected bibliography is included to assist readers in becoming familiar with some of the resources available to those who use cooperative groups for instruction.
Multiwavelength star formation indicators: Observations
Creators: name: Schmitt, H. R.
name: Calzetti, D.
name: Armus, L.
name: Giavalisco, M.
name: Heckman, T. M.
name: Kennicutt, R. C.
name: Leitherer, C.
name: Meurer, G. R.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We present a compilation of multiwavelength data on different star formation indicators for a sample of nearby star forming galaxies. Here we discuss the observations, reductions and measurements of ultraviolet images obtained with STIS, on board the Hubble Space Telescope, ground-based Halpha, and VLA 8.46 GHz radio images. These observations are complemented with infrared fluxes, as well as large aperture optical radio and ultraviolet data from the literature. This database will be used in a forthcoming paper to compare star formation rates at different wavebands. We also present spectral energy distributions (SEDs) for those galaxies with at least one far-infrared measurements from ISO, longward of 100 um. These SEDs are divided in two groups, those which are dominated by the far-infrared emission, and those where the contribution from the far-infrared and optical emission is comparable. These SEDs are useful tools to study the properties of high redshift galaxies.
description: 39 pages, 17 jpeg figures, 1 eps figure, To appear in ApJS May 2006
First Results from AMANDA using the TWR System
Creators: name: Silvestri, Andrea
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The Antarctic Muon And Neutrino Detector Array (AMANDA) has been taking data since 2000 and its data acquisition system was upgraded in January 2003 to read out the complete digitized waveforms from the buried Photomultipliers (PMTs) using Transient Waveform Recorders (TWR). This system currently runs in parallel with the standard AMANDA data acquisition system. Once AMANDA is incorporated into the 1 km^3 detector IceCube, only the TWR system will be kept. We report results from a first atmospheric neutrino analysis on data collected in 2003 with TWR. Good agreement in event rate and angular distribution verify the performance of the TWR system. A search of the northern hemisphere for localized event clusters shows no statistically significant excess, thus a flux limit is calculated, which is in full agreement with previous results based on the standard AMANDA data acquisition system. We also update the status of a search for diffusely distributed neutrinos with ultra high energy (UHE) using data collected by the TWR system.
description: 11 pages, 15 figures, to be published in Proceedings of International School of Cosmic Ray Astrophysics, 15th Course: "Astrophysics at Ultra-high Energies", Erice, Italy, 20-27 June 2006. Minor change: corrected y-label of fig.7 (right)
INTEGRATING TECHNOLOGY IN LANGUAGE LEARNING MATERIALS
Creators: name: Kholturaeva, Guzal
Publisher: name: Zenodo
Year: 2024

description: The way people obtaіn іnformatіon, learn, and connect wіth others across the world has changed dramatіcally as a result of technologіcal advancements. Technology has elіmіnated dіstance constraіnts, allowіng hіgher educatіon to effіcіently teach anybody. Іn order to іmprove teachіng and learnіng, technology іntegratіon іs becomіng more common іn classrooms. A better pattern for recognіzіng new teachіng models has evolved as a result of the fast expansіon of technology іntegratіon. As a result, іt іs crіtіcal іn both learnіng and teachіng language skіlls.
A Multi-Task, Multi-Modal Approach for Predicting Categorical and Dimensional Emotions
Creators: name: Ispas, Alex-Răzvan
name: Deschamps-Berger, Théo
name: Devillers, Laurence
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences
subject: I.2.7

description: Speech emotion recognition (SER) has received a great deal of attention in recent years in the context of spontaneous conversations. While there have been notable results on datasets like the well known corpus of naturalistic dyadic conversations, IEMOCAP, for both the case of categorical and dimensional emotions, there are few papers which try to predict both paradigms at the same time. Therefore, in this work, we aim to highlight the performance contribution of multi-task learning by proposing a multi-task, multi-modal system that predicts categorical and dimensional emotions. The results emphasise the importance of cross-regularisation between the two types of emotions. Our approach consists of a multi-task, multi-modal architecture that uses parallel feature refinement through self-attention for the feature of each modality. In order to fuse the features, our model introduces a set of learnable bridge tokens that merge the acoustic and linguistic features with the help of cross-attention. Our experiments for categorical emotions on 10-fold validation yield results comparable to the current state-of-the-art. In our configuration, our multi-task approach provides better results compared to learning each paradigm separately. On top of that, our best performing model achieves a high result for valence compared to the previous multi-task experiments.
description: Companion Publication of the 25th International Conference on Multimodal Interaction (pp. 311-317)
Determination of stellar parameters for Ariel targets: a comparison analysis between different spectroscopic methods
Creators: name: Brucalassi, A.
name: Tsantaki, M.
name: Magrini, L.
name: Sousa, S.
name: Danielski, C.
name: Biazzo, K.
name: Casali, G.
name: Van der Swaelmen, M.
name: Rainer, M.
name: Adibekyan, V.
name: Delgado-Mena, E.
name: Sanna, N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Ariel has been selected as the next ESA M4 science mission and it is expected to be launched in 2028. During its 4-year mission, Ariel will observe the atmospheres of a large and diversified population of transiting exoplanets. A key factor for the achievement of the scientific goal of Ariel is the selection strategy for the definition of the input target list. A meaningful choice of the targets requires an accurate knowledge of the planet hosting star properties and this is necessary to be obtained well before the launch. In this work, we present the results of a bench-marking analysis between three different spectroscopic techniques used to determine stellar parameters for a selected number of targets belonging to the Ariel reference sample. We aim to consolidate a method that will be used to homogeneously determine the stellar parameters of the complete Ariel reference sample. Homogeneous, accurate and precise derivation of stellar parameters is crucial for characterizing exoplanet-host stars and in turn is a key factor for the accuracy of the planet properties.
description: 15 pages, 6 figures, accepted for publication in Experimental Astronomy
Collisional broadening of alkali doublets by helium perturbers
Creators: name: Mullamphy, D. F. T.
name: Peach, G.
name: Venturi, V.
name: Whittingham, I. B.
name: Gibson, S. J.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We report results for the Lorentzian profiles of the Li I, Na I and K I doublets and the Na I subordinate doublet broadened by helium perturbers for temperatures up to 3000 K They have been obtained from a fully quantum-mechanical close-coupling description of the colliding atoms, the Baranger theory of line shapes and new ab initio potentials for the alkali-helium interaction. For all lines except the 769.9 nm K I line, the temperature dependence of the widths over the range 70 < T < 3000 K is accurately represented by the power law form w=aT^b with 0.37 < b < 0.43. The 769.9 K I line has this form for 500 < T < 3000 K with b = 0.49. Although the shifts have a more complex temperature dependence, they all have the general feature of increasing with temperature above T=500 K apart from the 769.9 K I line whose shift decreases with temperature.
description: 12 pages, 6 figures
In vitro αξιολόγηση της δυνατότητας αφαίρεσης εμφράξεων ριζικών σωλήνων με γουταπέρκα η smart seal:
Creators: name: Θεοδώρου, Παρασκευή Ευάγγελου
Publisher: name: Aristotle University of Thessaloniki
Year: 2010
Subjects: Αφαίρεση
Γουταπέρκα
Σμάρτ σήλ
Removal
Guttapercha
Smart seal

description: Σκοπός της παρούσας μελέτης ήταν η αξιολόγηση της δυνατότητας αφαίρεσης της ενδοδοντικής εμφράξεως του συστήματος Smart-Seal σε σύγκριση με την έμφραξη γουταπέρκας-2Seal. Χρησιμοποιήθηκαν εξήντα πρόσφατα εξαγχθέντα μονόρριζα δόντια τα οποία προπαρασκευάσθηκαν με το σύστημα Mtwo και χωρίστηκαν τυχαία σε τέσσερις ομάδες των δεκαπέντε δοντιών. Οι ομάδες 1 και 2 εμφράχθηκαν με την τεχνική της πλάγιας συμπύκνωσης κώνων γουταπέρκας και φύραματος 2Seal ενώ οι ομάδες 3 και 4 με την τεχνική έμφραξης του Smart Seal (μονού κώνου). Στις ομάδες 1 και 3 η αφαίρεση του εμφρακτικού υλικού έγινε με εργαλεία Hedstroem ενώ στις ομάδες 2 και 4 η αφαίρεση του εμφρακτικού υλικού έγινε με Mtwo Retreatment. Ο χρόνος αφαίρεσης κάθε έμφραξης καταγράφηκε. Ακολούθησε τομή των δοντιών κατά τον επιμήκη άξονα και φωτογράφιση των πολφικών τοιχωμάτων της οδοντίνης. Η μελέτη έγινε με λογισμικό ανάλυσης εικόνας για να αξιολογηθούν τα υπολείμματα του εμφρακτικού υλικού στα τοιχώματα του ριζικού σωλήνα. Η στατιστική ανάλυση έδειξε πως δεν υπάρχει σημαντική διαφορά στην αποτελεσματικότητα αφαίρεσης των δύο υλικών αν και η δυσκολία αφαίρεσης ήταν σημαντικά μεγαλύτερη στις ομάδες που το χρησιμοποιηθέν εμφρακτικό υλικό ήταν το Smart Seal.
description: The aim of this study was to evaluate the removal ability of the system of SmartSeal in comparison to Gutta Percha and 2Seal. Four groups of fifteen teeth were randomly selected and mechanically prepared with system Mtwo. Groups 1 and 2 were sealed with lateral condensation of Gutta Percha and 2Seal while Groups 3 and 4 were sealed with the system of SmartSeal. Retreatment in Groups 1 and 3 was performed with hand files Hedstroem while in Groups 2 and 4 with the rotary system of Mtwo Retreatment. The time of removal of the obturation material was recorded. Splitting of the roots was followed and the residual filling material on the canal walls was imaged and measured with image analyzer software. The statistical analysis showed no significant differences in the way of the removal of the two different materials, even thought removal of Smart Seal was most time consuming.
Impact of neutrino pair-production rates in Core-Collapse Supernovae
Creators: name: Betranhandy, Aurore
name: O'Connor, Evan
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: In this paper, we present a careful study on the impact of neutrino pair-production on core-collapse supernovae via spherically-symmetric, general-relativistic simulations of two different massive star progenitors with energy-dependent neutrino transport. We explore the impact and consequences of both the underlying microphysics and the implementation in the radiation transport algorithms on the supernova evolution, neutrino signal properties, and the explosion dynamics. We consider the two dominant neutrino pair-production processes found in supernovae, electron-positron annihilation as well as nucleon-nucleon bremsstrahlung in combination with both a simplified and a complete treatment of the processes in the radiation transport algorithms. We find that the use of the simplified prescription quantitatively impacts the neutrino signal at the 10\% level and potentially the supernova dynamics, as we show for the case of a 9.6M$_\odot$ progenitor. We also show that the choice of nucleon-nucleon bremsstrahlung interaction can also have a quantitative impact on the neutrino signal. A self-consistent treatment with state-of-the-art microphysics is suggested for precision simulations of core collapse, however the simplified treatment explored here is both computationally less demanding and results in a qualitatively similar evolution.
description: 15 pages, 7 figures, submitted to PRD