cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Light Field Image Super-Resolution with Transformers
Creators: name: Liang, Zhengyu
name: Wang, Yingqian
name: Wang, Longguang
name: Yang, Jungang
name: Zhou, Shilin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Light field (LF) image super-resolution (SR) aims at reconstructing high-resolution LF images from their low-resolution counterparts. Although CNN-based methods have achieved remarkable performance in LF image SR, these methods cannot fully model the non-local properties of the 4D LF data. In this paper, we propose a simple but effective Transformer-based method for LF image SR. In our method, an angular Transformer is designed to incorporate complementary information among different views, and a spatial Transformer is developed to capture both local and long-range dependencies within each sub-aperture image. With the proposed angular and spatial Transformers, the beneficial information in an LF can be fully exploited and the SR performance is boosted. We validate the effectiveness of our angular and spatial Transformers through extensive ablation studies, and compare our method to recent state-of-the-art methods on five public LF datasets. Our method achieves superior SR performance with a small model size and low computational cost. Code is available at https://github.com/ZhengyuLiang24/LFT.
description: This paper has been accepted by IEEE Signal Processing Letters. The current version on arXiv is identical to the final accepted version in content, but integrates the supplemental material (i.e., related work and visual comparisons) to the main body of the paper. Moreover, figures and tables of the arxiv version were zoomed for better visualization
Technical_Analysis_Of_Stocks.pdf
Creators: name: Manas Shukla
name: Abhishek Rai
name: Ankur Chokhani
name: Gawande, Kiran
Publisher: name: figshare
Year: 2021
Subjects: subject: 170203 Knowledge Representation and Machine Learning
subject: FOS: Psychology

description: July 2019Conference: Intelligent Computing and Smart Communication Technologies (ICSCT2019) Location: Hyderabad, India
Supernova 1996cr: SN 1987A's Wild Cousin?
Creators: name: Bauer, F. E.
name: Dwarkadas, V. V.
name: Brandt, W. N.
name: Immler, S.
name: Smartt, S.
name: Bartel, N.
name: Bietenholz, M. F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report on new VLT optical spectroscopic and multi-wavelength archival observations of SN1996cr, a previously identified ULX known as Circinus Galaxy X-2. Our optical spectrum confirms SN1996cr as a bona fide type IIn SN, while archival imaging isolates its explosion date to between 1995-02-28 and 1996-03-16. SN1996cr is one of the closest SNe (~3.8 Mpc) in the last several decades and in terms of flux ranks among the brightest radio and X-ray SNe ever detected. The wealth of optical, X-ray, and radio observations that exist for this source provide relatively detailed constraints on its post-explosion expansion and progenitor history, including an preliminary angular size constaint from VLBI. The archival X-ray and radio data imply that the progenitor of SN1996cr evacuated a large cavity just prior to exploding: the blast wave likely expanded for ~1-2 yrs before eventually striking the dense circumstellar material which surrounds SN1996cr. The X-ray and radio emission, which trace the progenitor mass-loss rate, have respectively risen by a factor of ~2 and remained roughly constant over the past 7 yr. This behavior is reminiscent of the late rise of SN1987A, but 1000 times more luminous and much more rapid to onset. Complex Oxygen line emission in the optical spectrum further hints at a possible concentric shell or ring-like structure. The discovery of SN1996cr suggests that a substantial fraction of the closest SNe observed in the last several decades have occurred in wind-blown bubbles. An Interplanetary Network position allows us to reject a tentative GRB association with BATSE 4B960202. [Abridged]
description: 25 pages with tables, 12 figures (color), accepted to ApJ, comments welcome; v2 - updated to reflect the subsequent rejection of our tentative GRB association based on a revised error region from the Interplanetary Network (thanks to Kevin Hurley) and include a few additional references; v3 - corrected some errors in Tables 7 and 8
Faithful Effective-One-Body waveforms of small-mass-ratio coalescing black-hole binaries
Creators: name: Damour, Thibault
name: Nagar, Alessandro
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We address the problem of constructing high-accuracy, faithful analytic waveforms describing the gravitational wave signal emitted by inspiralling and coalescing binary black holes. We work within the Effective-One-Body (EOB) framework and propose a methodology for improving the current (waveform)implementations of this framework based on understanding, element by element, the physics behind each feature of the waveform, and on systematically comparing various EOB-based waveforms with ``exact'' waveforms obtained by numerical relativity approaches. The present paper focuses on small-mass-ratio non-spinning binary systems, which can be conveniently studied by Regge-Wheeler-Zerilli-type methods. Our results include: (i) a resummed, 3PN-accurate description of the inspiral waveform, (ii) a better description of radiation reaction during the plunge, (iii) a refined analytic expression for the plunge waveform, (iv) an improved treatment of the matching between the plunge and ring-down waveforms. This improved implementation of the EOB approach allows us to construct complete analytic waveforms which exhibit a remarkable agreement with the ``exact'' ones in modulus, frequency and phase. In particular, the analytic and numerical waveforms stay in phase, during the whole process, within $\pm 1.1 %$ of a cycle. We expect that the extension of our methodology to the comparable-mass case will be able to generate comparably accurate analytic waveforms of direct use for the ground-based network of interferometric detectors of gravitational waves.
description: 13 pages, 6 figures. To appear in Phys. Rev. D
Soliton and black hole solutions of su(N) Einstein-Yang-Mills theory in anti-de Sitter space
Creators: name: Baxter, J. E.
name: Helbling, Marc
name: Winstanley, Elizabeth
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present new soliton and hairy black hole solutions of su(N) Einstein-Yang-Mills theory in asymptotically anti-de Sitter space. These solutions are described by N+1 independent parameters, and have N-1 gauge field degrees of freedom. We examine the space of solutions in detail for su(3) and su(4) solitons and black holes. If the magnitude of the cosmological constant is sufficiently large, we find solutions where all the gauge field functions have no zeros. These solutions are of particular interest because we anticipate that at least some of them will be linearly stable.
description: 15 pages, 20 figures, minor changes, accepted for publication in Physical Review D
title: Erklärbarkeitsstufen für die Mensch-KI-Interaktion in Visueller Textanalyse
Creators: name: El-Assady, Mennatallah
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2024

description: In dieser Dissertation wird untersucht, wie verschiedene Interessengruppen in die Lage versetzt werden können, mit künstlichen Intelligenzmodellen zu interagieren, um gemeinsam Probleme zu lösen und Entscheidungen zu treffen. Insbesondere geht es um die Frage, wie die Erklärbarkeit
so gestaltet werden kann, dass sie auf die jeweiligen Bedürfnisse und den Wissensstand der Beteilig-
ten zugeschnitten wird. Um diese Themen zu erforschen, wurde das Verfahren der mixed-initiative
Modelloptimierung von Inhalten und Themen gewählt, da es eine erhebliche Herausforderung für
viele Wissenschaftler darstellt. Noch wichtiger ist jedoch, dass dieses Problem einer Mehrzieloptimierung unterliegt, bei der die verfügbaren automatischen Qualitätsmetriken nicht unbedingt auf die menschliche Intuition abgestimmt sind. Diese Doktorarbeit stellt vier visuelle Textanalysetechniken vor, die eine solche Mensch-KI-Interaktion ermöglichen, wobei der Schwerpunkt auf der Unterstützung des Verhaltens, der Diagnose und der Optimierung von Topic Models liegt.
Novel ion-doped mesoporous glasses for bone tissue engineering: Study of their strctural characteristics influenced by the presence of phosphorous oxide
Creators: name: Philippart, A
name: Gomez-Cerezo, N
name: Arcos, D
name: Salinas, AJ
name: Boccardi, E
name: Vallet-Regi, M
name: Boccaccini, AR
Publisher: name: arXiv
Year: 2021
Subjects: subject: Tissues and Organs (q-bio.TO)
subject: Medical Physics (physics.med-ph)
subject: FOS: Biological sciences
subject: FOS: Physical sciences

description: Ion-doped binary SiO2-CaO and ternary SiO2-CaO-P2O5 mesoporous bioactive glasses were synthesised and characterised to evaluate the influence of P2O5 in the glass network structure. Strontium, copper and cobalt oxides in a proportion of 0.8 mol% were selected as dopants because the osteogenic and angiogenic properties reported for these elements. Although the four glass compositions investigated presented analogous textural properties, TEM analysis revealed that the structure of those containing P2O5 exhibited an increased ordered mesoporosity. Furthermore, 29Si NMR revealed that the incorporation of P2O5 increased the network connectivity and that this compound captured the Sr2+, Cu2+ and Co2+ ions preventing them to behave as modifiers of the silica network. In addition, 31P NMR results revealed that the nature of the cation directly influences the characteristics of the phosphate clusters. In this study, we have proven that phosphorous oxide entraps doping-metallic ions, granting these glasses with a greater mesopores order.
description: 16 pages, 9 figures
New anatomy of quantum holonomy
Creators: name: Cheon, Taksu
name: Tanaka, Atushi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present a unified formulation of quantum holonomy which is capable of describing all of its known varieties. The full role of non-Abelian gauge connection is elucidated. As examples, solvable models of quantum kicked spin are analyzed. They are shown to exhibit spiral holonomy, as well as Berry phase and Wilczek-Zee holonomy.
description: 5 pages EPL double column format, no figure. See allso http://www.kochi-tech.ac.jp/~cheon/
In-vitro-Analyse zur Wirkung ionisierender Strahlung auf Adipose-derived stem cells der weiblichen Brust
Creators: name: Schröder, Annemarie
Publisher: name: Universität Rostock
Year: 2020
Subjects: subject: 570 Life science
subject: 610 Medical sciences Medicine

description: Within breast tissue, adipose-derived stem cells (ADSCs) are responsible for maintaining cellular homeostasis. However, this potential can also contributed to the undesirable effect of tumor promotion. Therefore, this work deals with the effect of ionizing radiation on these interactions. In summary, the promoting effects of ADSCs on MCF-7 breast cancer cells were neutralized or reversed by a radiation treatment. Furthermore, ADSCs exhibit a medium radiation sensitivity associated with a functional DNA repair system.
On the Origin of Time and the Universe
Creators: name: Jejjala, Vishnu
name: Kavic, Michael
name: Minic, Djordje
name: Tze, Chia-Hsiung
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We present a novel solution to the low entropy and arrow of time puzzles of the initial state of the Universe. Our approach derives from the physics of a specific generalization of Matrix theory put forth in earlier work as the basis for a quantum theory of gravity. The particular dynamical state space of this theory, the infinite dimensional analogue of the Fubini-Study metric over a complex non-linear Grassmannian, has recently been studied by Michor and Mumford. The geodesic distance between any two points on this space is zero. Here we show that this mathematical result translates to a description of a hot, zero entropy state and an arrow of time after the Big Bang. This is modeled as a far from equilibrium, large fluctuation driven, "freezing by heating" metastable ordered phase transition of a non-linear dissipative dynamical system.
description: 4 pages
Stability of dual g-fusion frames in Hilbert spaces
Creators: name: Ghosh, Prasenjit
name: Samanta, T. K.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: Primary 42C15, Secondary 46B15, 46C07

description: We give a characterization of K-g-fusion frames and discuss the stability of dual g-fusion frames. We also present a necessary and sufficient condition for a quotient operator to be bounded.
description: 18 pages. arXiv admin note: text overlap with arXiv:2102.01965
title: Kooperative Android App Analyse
Creators: name: Pauck, Felix
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2024

description: In dieser Zusammenfassung der gleichnamigen Dissertation wird das Konzept kooperativer Analysen vorgestellt. Bereits existierende Analysen werden kombiniert, um ihre komplementären Eigenschaften gewinnbringend zusammenzubringen. Wie beliebige Analysen bewertet werden können, wird im Rahmen von automatisierten und reproduzierbaren Benchmarks erläutert.
Abschließend werden eben diese Benchmarks zur Evaluation eigenständiger und kooperativer Analysen genutzt. Dabei wird gezeigt, dass kooperative Analysen genauere Ergebnisse liefern als ihre eigenständigen Pendants.
Investigations on mixed harmonic cumulants in heavy-ion collisions at the LHC
Creators: name: Li, Ming
name: Zhou, You
name: Zhao, Wenbin
name: Fu, Baochi
name: Mou, Yawen
name: Song, Huichao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A series of new flow observables mixed harmonic multi-particle cumulants (MHC), which allow for the first time to quantify the correlations strength between different order of flow coefficients with various moments, was investigated using hydrodynamic model. These new observables are constructed based on multi-particle cumulants, and thus by design will be less sensitive to the non-flow contaminations. In addition to the previous study of correlation involving two flow coefficients with their second moments, both correlations of three flow coefficients and the correlations of higher order moments of $v_2$ and $v_3$ are systematically investigated using iEBE-VISHNU hybrid model with two different initial conditions, AMPT and TRENTo, respectively. These systematic studies using hydrodynamic models will significantly improve the understanding on the correlations between different orders (and moments) of flow coefficients. The hydrodynamic predictions shown in this paper and the future comparisons to experimental measurements will provide more constraints on theoretical models and extract more information about the transport properties of the quark-gluon plasma created in heavy-ion collisions.
description: 10 pages, 5 figures
Boosted Black Holes on Kaluza-Klein Bubbles
Creators: name: Iguchi, Hideo
name: Mishima, Takashi
name: Tomizawa, Shinya
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: We construct an exact stationary solution of black hole -- bubble sequence in the five dimensional Kaluza-Klein theory by using solitonic solution generating techniques. The solution describes two boosted black holes with topology S^3 on a Kaluza-Klein bubble and has a linear momentum component in the compactified direction. The ADM mass and the linear momentum depend on the two boosted velocity parameters of black holes. In the effective four dimensional theory, the solution has an electric charge which is proportional to the linear momentum. The solution includes the static solution found by Elvang and Horowitz and a limit of single boosted black string.
description: 17 pages, 1 figure
title: Social dynamics of values, taboos and perceived threats around sacred groves in Kurdistan, Iran
Creators: name: Plieninger, Tobias
name: Quintas-Soriano, Cristina
name: Torralba, Mario
name: Samani, Kyumars Mohammadi
name: Shakeri, Zahed
Publisher: name: Universität Kassel
Year: 2020
Subjects: subject: biocultural conservation
subject: community-based conservation
subject: protected areas
subject: religion
subject: sacred forests
subject: sacred natural sites
subject: traditional ecological knowledge
subject: 300
subject: 580
subject: Iran
subject: Biodiversität
subject: Erhaltung
subject: Baumkult
subject: Gemeinschaft
subject: Naturschutzgebiet
subject: Religion
subject: Wald
subject: Heiligtum

description: Gefördert durch den Publikationsfonds der Universität Kassel
Buchsteiner loops
Creators: name: Csorgo, Piroska
name: Drapal, Ales
name: Kinyon, Michael K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20N05

description: Buchsteiner loops are those which satisfy the identity $x\backslash (xy \cdot z) = (y \cdot zx)/ x$. We show that a Buchsteiner loop modulo its nucleus is an abelian group of exponent four, and construct an example where the factor achieves this exponent.
description: 33 pages
Modeling the Operation of an Autonomous Profilograph as a Dynamic System When Measuring Oceanological Fields
Creators: name: Krasnodubets, L. A.
name: Grekov, Aleksandr N.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Atmospheric and Oceanic Physics (physics.ao-ph)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Physical sciences

description: On the basis of the proposed model of a diving buoy with adjustable buoyancy, a model of a double-loop adaptive control system for the speed modes of an autonomous profiler has been developed, depending on the gradients of the measured parameters. The results of modeling are presented.
description: 7 pages, 4 figures
Density Functional Theory of Inhomogeneous Liquids: III. Liquid-Vapor Nucleation
Creators: name: Lutsko, James F.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The process of nucleation of vapor bubbles from a superheated liquid and of liquid droplets from a supersaturated vapor is investigated using the Modified-Core van der Waals model Density Functional Theory (Lutsko, JCP 128, 184711 (2008)). A novel approach is developed whereby nucleation is viewed as a transition from a metastable state to a stable state via the minimum free energy path which is identified using the nudged elastic-band method for exploring free energy surfaces. This allows for the unbiased calculation of the properties of sub- and super-critical clusters, as well as of the critical cluster. For Lennard-Jones fluids, the results compare well to simulation and support the view that even at high supersaturation nucleation proceeds smoothly rather than via spinodal-like instabilities as has been suggested recently.
Thermodynamics of magnesium in liquid nickel solutions
Creators: name: Samuelsson, Eva
Publisher: name: University of British Columbia
Year: 2010

description: A novel experimental method to determine the activity of alloy components in very dilute liquid metal solutions has been developed. The method is applied to the measurement of magnesium vapour pressure over nickel alloys to find the thermodynamic properties of magnesium in dilute liquid solutions at 1470°C. The experimental method employs a commercial Atomic Absorption Spectrophotometer to determine directly the vapour pressure of magnesium over the alloys. A radiatively heated Knudsen cell inside a vacuum system contains the metal. Equilibrium constants are given for the reactions, [Formula Omitted] where Al, 0 and Mg are dissolved in liquid nickel. Further, values for the metal-oxygen interaction coefficients [Formula Omitted] and [Formula Omitted] are determined. Finally, a value for the Raoultian activity coefficient at infinite dilution is suggested. A significant change in the activity of magnesium upon the addition of 20% chromium or iron to the dilute liquid nickel alloys was not detected. This is believed due to overpowering magnesium-oxygen interaction at these levels of chromium and iron.
title: Design und Anwendung von Algorithmen für die Genominferenz
Creators: name: Ebler, Jana
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2024

description: Die Rekonstruktion der Genomsequenz eines Individuums ist essentiell, um geneti-
sche Varianten zu analysieren und deren Effekte zu verstehen. Computergestützte Methoden zur
Rekonstruktion solcher Sequenzen basieren oft auf einem Referenzgenom, einer DNA-Sequenz,
die die Genomsequenz einer Spezies repräsentiert. Neue Sequenziertechnologien ermöglichen die
referenzfreie Rekonstruktion von Genomsequenzen und erlauben es, Pangenom-Graphen zu erstellen,
neuartige Datenstrukturen, die im Gegensatz zu einem Referenzgenom die genetische Vielfalt einer
Art widerspiegeln. Wir stellen einen neuen Algorithmus für die Analyse genetischer Varianten vor und
zeigen, dass wir damit Bereiche des Genoms analysieren können, die zuvor nicht zugänglich waren.
RDA Europe Final Sustainability Strategy
Creators: name: Bangert, Daniel
name: Hanahoe, Hilary
name: Ashley, Kevin
name: Muscella, Silvana
name: Garavelli, Sara
name: Pittonet, Sara
name: Biro, Timea
Publisher: name: Zenodo
Year: 2020
Subjects: RDA
Research Data Alliance
RDA Outputs
EOSC
European Open Science Cloud
Open science

description: The European Council Conclusions on Shaping Europe's Digital Future, approved on 9 June 2020, states that “open science principles and Research Data Alliance recommendations are useful for supporting the decision-making authorities in promoting a flexible common approach for the collection, processing and availability of data” and welcomes this in the context of the development of EOSC. This is a very significant occurrence and a very important recognition from one of the highest European Union bodies of the value of the work of RDA. The current RDA Europe 4.0 partners and national nodes, together with the European Commission (INFRAEOSC-03 call) recognise the value of RDA’s global forum and European activities and are committed to sustaining them. The strengths of RDA in the European context include the global reach of RDA, its ‘neutral’ position and platform, its role in forming continental (European) cohesion on matters related to research data, its penetration in national communities through membership at the individual and organisational levels as well via the national nodes, and RDA’s role in the broader vision and roadmap for Open Science in Europe, linked to developments within the European Open Science Cloud. A number of vehicles are possible to operate and finance the future activities of RDA in Europe, and work has been done in the context of the RDA Europe 4.0 project to identify and appraise options, both at the European and national node level. The evaluation and piloting of sustainability paths has required close alignment with developments at the global RDA level, including the endorsement of any proposed organisational structure by the RDA Foundation and Council.
Additional file 4 of Genome-wide genetic structure and selection signatures for color in 10 traditional Chinese yellow-feathered chicken breeds
Creators: name: Huang, Xunhe
name: Otecko, Newton O.
name: Peng, Minsheng
name: Weng, Zhuoxian
name: Li, Weina
name: Chen, Jiebo
name: Zhong, Ming
name: Zhong, Fusheng
name: Jin, Sihua
name: Geng, Zhaoyu
name: Luo, Wei
name: He, Danlin
name: Ma, Cheng
name: Han, Jianlin
name: Ommeh, Sheila C.
name: Zhang, Yaping
name: Zhang, Xiquan
name: Du, Bingwang
Publisher: name: figshare
Year: 2020
Subjects: subject: Genetics
subject: FOS: Biological sciences

description: Additional file 4: Fig. S1 Constitution of clean sequencing reads of all 110 chicken genomes produced in this study. Fig. S2 Summary of the average sequencing coverage of all 110 chicken genomes generated in this study. Fig. S3 Circos plot depicting the genomic variants landscape in each chromosome. Fig. S4 Annotation of the clean genomic SNPs of all 110 chickens sequenced in this study. Fig. S5 Transition-transversion analysis of the clean SNPs of all 110 chicken genomes sequenced in this study. Fig. S6 Annotation of the clean InDels of all 110 chicken genomes sequenced in this study. Fig. S7 Summary of the structural variations (SVs) and copy number variations (CNVs) in all 110 chicken genomes generated in this study.
Respect My Authority! HITS Without Hyperlinks, Utilizing Cluster-Based Language Models
Creators: name: Kurland, Oren
name: Lee, Lillian
Publisher: name: arXiv
Year: 2008
Subjects: subject: Information Retrieval (cs.IR)
subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences
subject: H.3.3; I.2.7

description: We present an approach to improving the precision of an initial document ranking wherein we utilize cluster information within a graph-based framework. The main idea is to perform re-ranking based on centrality within bipartite graphs of documents (on one side) and clusters (on the other side), on the premise that these are mutually reinforcing entities. Links between entities are created via consideration of language models induced from them. We find that our cluster-document graphs give rise to much better retrieval performance than previously proposed document-only graphs do. For example, authority-based re-ranking of documents via a HITS-style cluster-based approach outperforms a previously-proposed PageRank-inspired algorithm applied to solely-document graphs. Moreover, we also show that computing authority scores for clusters constitutes an effective method for identifying clusters containing a large percentage of relevant documents.
Theoretical band-gap bounds and coupling sensitivity for a periodic medium with branching resonators
Creators: name: Bastawrous, Mary V.
name: Hussein, Mahmoud I.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: Elastic metamaterials may exhibit band gaps at wavelengths far exceeding feature sizes. This is attributed to local resonances of embedded or branching substructures. In branched configurations, such as a pillared plate, waves propagating in the base medium-e.g., the plate portion-experience attenuation at band-gap frequencies. Considering a simplified lumped-parameter model for a branched medium, we present a theoretical treatment for a periodic unit cell comprising a base mass-spring chain with a multi-degree-of-freedom, mono-coupled branch. Bloch's theorem is applied, combined with a sub-structuring approach where the resonating branch is modelled separately and condensed into its effective dynamic stiffness. Thus, the treatment is generally applicable to an arbitrary branch regardless of its size and properties. We provide an analysis-with guiding graphical illustrations-that yields an identification of fundamental bounds for the band-gap edges as dictated by the dynamical characteristics of the branch. Analytical sensitivity functions are also derived for the dependence of these bounds on the degree of coupling between the base and the branch. The sensitivity analysis reveals further novel findings including the role of the frequency derivative of the branch dynamic stiffness in providing a direct relation between the band-gap edge locations and variation in the coupling parameters-the mass and stiffness ratios between the base chain and the branch root. In additional analysis, sub-Bragg bounds of an exact model comprising a one-dimensional (1D) continuous base-modelled as a rod-and a discrete branch are derived and shown to be tighter than those of the all-discrete model. Finally, the applicability of the derived bounds and sensitivity functions are shown to be valid for a corresponding full 2D finite-element model of a pillared waveguide admitting out-of-plane shear waves.
title: Monitoring der Qualität von Video Streaming und Internet der Dingen Anwendungen
Creators: name: Loh, Frank
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2024

description: Die fortlaufende und sich weiterentwickelnde Nutzung von Kommunikationsnetzen
stellt zwei entscheidende Herausforderungen für aktuelle und zukünftige Netze dar, die spezielle
Aufmerksamkeit erfordern: (1) die Aufgabe, den enormen und stetig wachsenden Datenverkehr effektiv
zu verwalten, und (2) die Notwendigkeit, die durch die Einführung des Internets der Dinge resultierende
große Anzahl an Endgeräten zu bewältigen. Außerdem ist eine Reduzierung des Energieverbrauchs,
eine effizientere Ressourcennutzung und Prozessoptimierungen ohne Einbußen bei der Servicequalität
essenziell. Wir gehen diese Bemühungen umfassend an und befassen uns mit der Überwachung und
Qualitätsbewertung von Streaming-Anwendungen, die einen wesentlichen Anteil des Internetverkehrs
erzeugen, sowie mit der Durchführung einer generellen Analyse der Netzleistung innerhalb eines Long
Range Wide Area Networks (LoRaWANs), einer der am schnellsten wachsenden LPWAN-Lösungen.
Multipartite entanglement of superpositions
Creators: name: Cavalcanti, D.
name: Cunha, M. O. Terra
name: Acin, A.
Publisher: name: arXiv
Year: 2007
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The entanglement of superpositions [Phys. Rev. Lett. 97, 100502 (2006)] is generalized to the multipartite scenario: an upper bound to the multipartite entanglement of a superposition is given in terms of the entanglement of the superposed states and the superposition coefficients. This bound is proven to be tight for a class of states composed by an arbitrary number of qubits. We also extend the result to a large family of quantifiers which includes the negativity, the robustness of entanglement, and the best separable approximation measure.
description: 4 pages. v2: reference added, text improved in clarity
Myrmecothea myrmecoides
Creators: name: Kameneva, E. P.
name: Korneyev, V. A.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Ulidiidae
Myrmecothea
Myrmecothea myrmecoides

description: Cephalia myrmecoides Loew, 1860 (fig. 6)
Valid name. Myrmecothea myrmecoides (Loew, 1860) (Ulidiidae).
Cephalia myrmecoides Loew, 1860: 24 (Washington, D.C.).
Myrmecothea myrmecoides: Hendel, 1910: 310, 1914: 16; Steyskal, 1961: 404; 1965: 646; Wallace, 2021: 9, 14, 69.
Material. Type. Holotype ♂: “Type / 13244 ”, “ Loew. / coll.” (MCZ). Non-type. USA: Maryland, Chevy Chase, 30.05.1964 2 ♂ (P. P. Babiy leg.) (MCZ); Virginia: “ DixieLndg //5.30 Va.”, coll. Hendel ”, 2 ♀ (NHMW).
R e m a r k s: Hendel (1910) established a separate genus based on a single autapomorphy which differentiates it from Cephalia: i. e. anal lobe and alula absent; most other characters are similar to Cephalia rufipes. Should Cephalia be found to contain more than one species, Myrmecothea should be considered a derived terminal taxon rather than its sister taxon.
description: Published as part of Kameneva, E. P. & Korneyev, V. A., 2022, Identity Of Species Assigned To The Genus Cephalia (Diptera, Tephritoidea), pp. 447-462 in Zoodiversity 56 (6) on page 456, DOI: 10.15407/zoo2022.06.447, http://zenodo.org/record/10831280
Fermionic fields in the pseudoparticle approach
Creators: name: Wagner, Marc
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The pseudoparticle approach is a numerical method to compute path integrals without discretizing spacetime. The basic idea is to consider only those field configurations, which can be represented as a linear superposition of a small number of localized building blocks (pseudoparticles), and to replace the functional integration by an integration over the pseudoparticle degrees of freedom. In previous papers we have successfully applied the pseudoparticle approach to SU(2) Yang-Mills theory. In this work we discuss the inclusion of fermionic fields in the pseudoparticle approach. To test our method, we compute the phase diagram of the 1+1-dimensional Gross-Neveu model in the large-N limit as well as the chiral condensate in the crystal phase.
description: Talk presented at Lattice 2007 (Vacuum Structure and Confinement), 7 pages, 3 figures
MPEC 2025-G62 : 2025 FA23
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2025
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2025 FA23

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
title: Optimierung unter Erforschbarer Unsicherheit: Jenseits des Worst-Case
Creators: name: Schlöter, Jens
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2024

description: Unsicherheit in den Eingabedaten von Optimierungsproblemen ist eine allgegenwärtige
Herausforderung in praktischen Anwendungen. Man denke beispielsweise an auf Grund von unbe-
kannten Verkehrsbedingungen schwankende Transportzeiten in der Logistik oder an unbekannte
Ausführungszeiten von zu planenden Aufgaben in der Ablaufplanung. Das Feld der Erforschbaren
Unsicherheit befasst sich mit Szenarien in denen Eingabedaten von Optimierungsproblemen unsicher
sind, aber mittels kostspieliger Abfragen ermittelt werden können. Da die Abfragen kostspielig sind,
besteht das Ziel darin, eine optimale Lösung für das zugrundeliegende Optimierungsproblem zu
finden und die zusätzlichen Abfragekosten zu minimieren. Bisher wurden Probleme in diesem Gebiet
nahezu ausschließlich mit pessimistischen Worst-Case Analysen untersucht. Diese Arbeit betrachtet
Probleme unter erforschbarer Unsicherheit und zeigt, dass Verbesserungen über pessimistische untere
Schranken möglich sind, wenn diese Probleme über den Worst-Case hinaus analysiert werde
Nonlinear Programming Methods for Distributed Optimization
Creators: name: Matei, Ion
name: Baras, John
Publisher: name: Digital Repository at the University of Maryland
Year: 2015
Subjects: nonlinear programming
distributed optimization

description: In this paper we investigate how standard nonlinear programming algorithms can be used to solve constrained
optimization problems in a distributed manner. The optimization setup consists of a set of agents interacting through
a communication graph that have as common goal the minimization of a function expressed as a sum of (possibly
non-convex) differentiable functions. Each function in the sum corresponds to an agent and each agent has associated
an equality constraint. By re-casting the distributed optimization problem into an equivalent, augmented centralized
problem, we show that distributed algorithms result naturally from applying standard nonlinear programming tech-
niques. Due to the distributed formulation, the standard assumptions and convergence results no longer hold. We
emphasize what changes are necessary for convergence to still be achieved for three algorithms: two algorithms
based on Lagrangian methods, and an algorithm based the method of multipliers. The changes in the convergence
results are necessary mainly due to the fact that the (local) minimizers of the lifted optimization problem are not
regular, as a results of the distributed formulation. Unlike the standard algorithm based on the method of multipliers,
for the distributed version we cannot show that the theoretical super-linear convergence rate can be achieved.
Can gravitational collapse sustain singularity-free trapped surfaces?
Creators: name: Mbonye, Manasse R.
name: Kazanas, Demosthenes
Publisher: name: arXiv
Year: 2007
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In singularity generating spacetimes both the out-going and in-going expansions of null geodesic congruences $θ^{+}$ and $θ^{-}$ should become increasingly negative without bound, inside the horizon. This behavior leads to geodetic incompleteness which in turn predicts the existence of a singularity. In this work we inquire on whether, in gravitational collapse, spacetime can sustain singularity-free trapped surfaces, in the sense that such a spacetime remains geodetically complete. As a test case, we consider a well known solution of the Einstien Field Equations which is Schwarzschild-like at large distances and consists of a fluid with a $p=-ρ$ equation of state near $r=0$. By following both the expansion parameters $θ^{+}$ and $θ^{-}$ across the horizon and into the black hole we find that both $θ^{+}$ and $θ^{+}θ^{-}$ have turning points inside the trapped region. Further, we find that deep inside the black hole there is a region $0\leq r
description: 17 pages, 3 figures, accepted for publication in International Journal of Modern Physics D
Raman spectra of epitaxial graphene on SiC and of epitaxial graphene transferred to SiO2
Creators: name: Lee, Dong Su
name: Riedl, Christian
name: Krauß, Benjamin
name: von Klitzing, Klaus
name: Starke, Ulrich
name: Smet, Jurgen H.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Raman spectra were measured for mono-, bi- and trilayer graphene grown on SiC by solid state graphitization, whereby the number of layers was pre-assigned by angle-resolved ultraviolet photoemission spectroscopy. It was found that the only unambiguous fingerprint in Raman spectroscopy to identify the number of layers for graphene on SiC(0001) is the linewidth of the 2D (or D*) peak. The Raman spectra of epitaxial graphene show significant differences as compared to micromechanically cleaved graphene obtained from highly oriented pyrolytic graphite crystals. The G peak is found to be blue-shifted. The 2D peak does not exhibit any obvious shoulder structures but it is much broader and almost resembles a single-peak even for multilayers. Flakes of epitaxial graphene were transferred from SiC onto SiO2 for further Raman studies. A comparison of the Raman data obtained for graphene on SiC with data for epitaxial graphene transferred to SiO2 reveals that the G peak blue-shift is clearly due to the SiC substrate. The broadened 2D peak however stems from the graphene structure itself and not from the substrate.
description: 27 pages, 8 figures
Detection of Fe and evidence for TiO in the dayside emission spectrum of WASP-33b
Creators: name: Cont, D.
name: Yan, F.
name: Reiners, A.
name: Casasayas-Barris, N.
name: Mollière, P.
name: Pallé, E.
name: Henning, Th.
name: Nortmann, L.
name: Stangret, M.
name: Czesla, S.
name: López-Puertas, M.
name: Sánchez-López, A.
name: Rodler, F.
name: Ribas, I.
name: Quirrenbach, A.
name: Caballero, J. A.
name: Amado, P. J.
name: Carone, L.
name: Khaimova, J.
name: Kreidberg, L.
name: Molaverdikhani, K.
name: Montes, D.
name: Morello, G.
name: Nagel, E.
name: Oshagh, M.
name: Zechmeister, M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: Theoretical studies predict the presence of thermal inversions in the atmosphere of highly irradiated gas giant planets. Recent observations have identified these inversion layers. However, the role of different chemical species in their formation remains unclear. We search for the signature of the thermal inversion agents TiO and Fe in the dayside emission spectrum of the ultra-hot Jupiter WASP-33b. The spectra were obtained with CARMENES and HARPS-N, covering different wavelength ranges. Telluric and stellar absorption lines were removed with SYSREM. We cross-correlated the residual spectra with model spectra to retrieve the signals from the planetary atmosphere. We find evidence for TiO at a significance of 4.9$\mathrmσ$ with CARMENES. The strength of the TiO signal drops close to the secondary eclipse. No TiO signal is found with HARPS-N. An injection-recovery test suggests that the TiO signal is below the detection level at the wavelengths covered by HARPS-N. The emission signature of Fe is detected with both instruments at significance levels of 5.7$\mathrmσ$ and 4.5$\mathrmσ$, respectively. By combining all observations, we obtain a significance level of 7.3$\mathrmσ$ for Fe. We find the TiO signal at $K_\mathrm{p}$ = $248.0_{-2.5}^{+2.0}$ km s$^{-1}$, which is in disagreement with the Fe detection at $K_\mathrm{p}$ = $225.0_{-3.5}^{+4.0}$ km s$^{-1}$. The $K_\mathrm{p}$ value for Fe is in agreement with prior investigations. The model spectra require different temperature profiles for TiO and Fe to match the observations. We observe a broader line profile for Fe than for TiO. Our results confirm the existence of a temperature inversion layer in the planetary atmosphere. The observed $K_\mathrm{p}$ offset and different strengths of broadening in the line profiles suggest the existence of a TiO-depleted hot spot in the planetary atmosphere.
description: 21 pages, 20 figures, A&A, in press
title: Kombinatorische Spiele als Schlüssel in der Komplexitätsanalyse aussagenlogischer Formeln
Creators: name: Wörz, Florian
Publisher: name: Gesellschaft für Informatik e.V.
Year: 2024

description: Beweiskomplexität ist ein Forschungsgebiet im Spannungsfeld zwischen Logik, Algorith-
mik und Komplexitätstheorie. Es untersucht die Ressourcen (z. B. Zeit oder Platz), die benötigt werden,
um Aussagen mittels sogenannter Beweissysteme zu beweisen. Da jeder SAT-Solver implizit ein
Beweissystem definiert, lassen sich Resultate in der Beweiskomplexität in Analysen von SAT-Solvern
übersetzen. In der Dissertation [Wö23] des Autors werden zahlreiche neuen Verbindungen zwischen
kombinatorischen Murmelspielen und Komplexitätsmaßen für aussagenlogische Beweissysteme
bewiesen. Diese neuartigen Analysewerkzeuge ermöglichen es erstmals, den Speicherverbrauch
verschiedener SAT-Solver-Paradigmen systematisch und mathematisch formal miteinander zu verglei-
chen. Zudem erlauben die Verbindungen die Analyse von Graphenisomorphieformeln mit Hilfe von
Werkzeugen aus der endlichen Modelltheorie, genauer gesagt der deskriptiven Komplexitätstheorie.
Diese Querverbindungen ermöglichen den Beweis von zahlreichen oberen und untereren Schranken
der Größe von Widerlegungen von Graphenisomorphie. Insbesondere wird für verschiedenartige
Graphenklassen (z. B. planare Graphen und Graphen mit verbotenen Minoren) gezeigt, dass diese
kurze Beweise im geometrischen Schnittebenenverfahren besitzen. Für das Beweissystem Resolution
entwerfen wir sogar Automatisierbarkeitsalgorithmen, die kurze Graphenisomorphiebeweise von
speziellen Graphenklassen in polynomieller Zeit konstruieren.
Neutrino sector impacts SUSY dark matter
Creators: name: Barger, Vernon
name: Marfatia, Danny
name: Mustafayev, Azar
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Astrophysics (astro-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Motivated by the fact that neutrinos are massive, we study the effect of neutrino Yukawa couplings on neutralino dark matter observables within the framework of a supersymmetric seesaw. We find that neutrino couplings significantly affect the neutralino relic density in regions of parameter space where soft SUSY-breaking slepton masses and/or trilinear couplings are large. Depending on the size of the couplings, the neutralino relic density spans over an order of magnitude in the A-funnel, focus point and stop-coannihilation regions of mSUGRA. We also show that dark matter detection rates can be modified by up to several orders of magnitude.
description: 18 pages, 7 figures, 1 table. Version to appear in PLB
Alumina - silicon carbide composites from kaolinite-carbon precursors by hot-pressing
Creators: name: Penugonda, Madhusudhan R.
Publisher: name: University of British Columbia
Year: 2010

description: The system kaolinite - carbon black consisting of cheap precursors has been investigated, in terms of its potential to form A1₂ O₃ - SiC composites. The carbothermal reduction process of mullite and silica was studied, in detail, in the range 1275° to 1810° C and over different periods, both under sintering as well as hot-pressing conditions. It was established that the reduction of mullite and silica starts around 1450° C, where the rate of reaction is very slow. Until about 1800° C during the reduction of mullite, SiO₂ gets preferentially reduced, thus forming a composite ceramic consisting of SiC and A1₂ O₃ phases. The kinetics of the formation of SiC + A1₂ O₃ were followed in the range 1590° - 1660° C and it was noted that under hot-pressing conditions they follow a contracting cylinder model. The rate of reaction increased with the increase in temperature and followed a parabolic path with time because of the geometry of the hot-pressed specimens at each temperature. This indicated that the gas diffusion in and out of the system along the edges of the cylindrical specimens is the rate controlling step. The activation energy of the reduction process was calculated to be 922 KJ/mole. The application of pressure prior to the carbothermal reduction process seemed to be not favourable for the formation of SiC and A1₂ O₃, however, when applied after the beginning of soaking period, this greatly improved the densities and formation of SiC and A1₂ O₃. The microstructure of the samples was analysed using SEM and TEM. It was found that the grain size of the composite ceramic was of the order of 0.2μm. SiC was present mainly in the form of fine platelets. Finally, the isothermal compaction behaviour of the system was studied under a constant pressure in the temperature range 1200° C - 1800° C, during which the formation and carbothermal reduction of mullite and silica took place. A mathematical model based on the least squares fitting was used to fit the compaction curves. Due to the complex nature of the compaction data an empirical approach was used to interpret the data and a viscoelastic model was developed. It was found that the interactive-double-Kelvin unit having two elastic and two viscous components explained the type of compaction behaviour observed in the kaolinite + C system. One of the viscous components (η₁) and one of the elastic components (M₁) were found to be temperature sensitive. It is concluded that starting from the cheap precursors (kaolinite and carbon black) a particulate composite of A1₂ O₃,-SiC can be produced by hot-pressing technique. SiC-whisker formation is not encountered in this system. The very fine grain size of the paniculate composite, resulting in a small flaw size, should provide the composite ceramic with good mechanical properties.