cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Gravitational-wave Limits from Pulsar Timing Constrain Supermassive Black Hole Evolution
Creators: name: Shannon, R. M.
name: Ravi, V.
name: Coles, W. A.
name: Hobbs, G.
name: Keith, M. J.
name: Manchester, R. N.
name: Wyithe, J. S. B.
name: Bailes, M.
name: Bhat, N. D. R.
name: Burke-Spolaor, S.
name: Khoo, J.
name: Levin, Y.
name: Osłowski, S.
name: Sarkissian, J. M.
name: van Straten, W.
name: Verbiest, J. P. W.
name: Wang, J-B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: The formation and growth processes of supermassive black holes (SMBHs) are not well constrained. SMBH population models, however, provide specific predictions for the properties of the gravitational-wave background (GWB) from binary SMBHs in merging galaxies throughout the Universe. Using observations from the Parkes Pulsar Timing Array, we constrain the fractional GWB energy density with 95% confidence to be $Ω_{GW}(H_0/73 {\rm km} {\rm s}^{-1} {\rm Mpc}^{-1})^2 < 1.3 \times 10^{-9}$ at a frequency of 2.8 nHz, which is approximately a factor of six more stringent than previous limits. We compare our limit to models of the SMBH population and find inconsistencies at confidence levels between 46% and 91%. For example, the standard galaxy formation model implemented in the Millennium simulations is inconsistent with our limit with 50% probability.
description: Published in Science 18 October 2013
Flore d'Afrique centrale - Spermatophyta - Hydrostachyaceae
Creators: name: Hauman, L.
Publisher: name: Zenodo
Year: 1948
Subjects: Flora
Plants
Identification
Central Africa
Democratic Republic of the Congo
Rwanda
Burundi
Botany
Systematics
Taxonomy

description: PDF version of treatment of Hydrostachyaceae in Flore d'Afrique centrale series
Flore d'Afrique centrale - Spermatophyta - Fumariaceae
Creators: name: Léonard, J.
Publisher: name: Zenodo
Year: 1951
Subjects: Flora
Plants
Identification
Botany
Systematics
Taxonomy
Central Africa
Democratic Republic of the Congo
Rwanda
Burundi

description: PDF version of treatment of Fumariaceae in Flore d'Afrique centrale series
The geometry of graded cotangent bundles
Creators: name: Cueca, Miquel
Publisher: name: arXiv
Year: 2019
Subjects: subject: Symplectic Geometry (math.SG)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: Given a vector bundle $A\to M$ we study the geometry of the graded manifolds $T^*[k]A[1]$, including their canonical symplectic structures, compatible Q-structures and Lagrangian Q-submanifolds. We relate these graded objects to classical structures, such as higher Courant algebroids on $A\oplus\bigwedge^{k-1}A^*$ and higher Dirac structures therein, semi-direct products of Lie algebroid structures on $A$ with their coadjoint representations up to homotopy, and branes on certain AKSZ $σ$-models.
description: 28 pages
Design of a wavelength frame multiplication system using acceptance diagrams
Creators: name: Nekrassov, D.
name: Zendler, C.
name: Lieutenant, K.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: The concept of Wavelength Frame Multiplication (WFM) was developed to extend the usable wavelength range on long pulse neutron sources for instruments using pulse shaping choppers. For some instruments, it is combined with a pulse shaping double chopper, which defines a constant wavelength resolution, and a set of frame overlap choppers that prevent spurious neutrons from reaching the detector thus avoiding systematic errors in the calculation of wavelength from time of flight. Due to its complexity, the design of such a system is challenging and there are several criteria that need to be accounted for. In this work, the design of the WFM chopper system for the potential future liquids reflectometer at the European Spallation Source (ESS) is presented, which makes use of acceptance diagrams. They prove to be a powerful tool for understanding the work principle of the system and recognizing potential problems. The authors assume that the presented study can be useful for design or upgrade of further instruments, in particular the ones planned for the ESS.
description: Published in Nuclear Instruments and Methods in Physics Research, Section A
Flore d'Afrique centrale - Spermatophyta - Cruciferae
Creators: name: Robyns, W.
name: Boutique, R.
Publisher: name: Zenodo
Year: 1951
Subjects: Flora
Plants
Identification
Botany
Systematics
Taxonomy
Central Africa
Democratic Republic of the Congo
Rwanda
Burundi

description: PDF version of treatment of Cruciferae in Flore d'Afrique centrale series
Mirostrellus joffrei Thomas 1915
Creators: name: Mou, Xin
name: Li, Mei
name: Li, Biao
name: Luo, Xiong
name: Li, Song
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Chordata
Mammalia
Chiroptera
Vespertilionidae
Mirostrellus
Mirostrellus joffrei

description: Mirostrellus joffrei Thomas, 1915
Materials
Type status: Other material. Occurrence: catalogNumber: KIZ 20230423; recordedBy: Xin Mou et al.; individualCount: 1; sex: male; lifeStage: adult; occurrenceID: F 6735870 - 3 E 0 E- 52 CD-BCC 3 - 200 C 392 C 38 F 3; Taxon: taxonID: https://www.gbif.org/species/11122810; scientificName: Mirostrellus joffrei Thomas, 1915; kingdom: Animalia; phylum: Chordata; class: Mammalia; order: Chiroptera; family: Vespertilionidae; genus: Mirostrellus; Location: country: China; stateProvince: Yunnan; locality: Guanyinshan Nature Reserve, Mt. Guanyin; verbatimElevation: 2434 m; verbatimCoordinates: 22 ° 59.41 ' N 102 ° 59.91 ' E; decimalLatitude: 22.99; decimalLongitude: 103.00; georeferenceProtocol: label; Event: eventDate: 21 - 05 - 23
Diagnosis
According to Görföl et al. (2020), " A medium-sized vespertilionid, with a FA of 35.7–40.2 mm. The fifth finger of the wing is shortened (on average 20 mm shorter than the fourth finger) and the pelage is sparse and velvety. The supraorbital tubercles are well-developed, protruding for 1.47–1.76 mm measured from the lachrymal opening; the sagittal crest is barely visible, being only approximately 0.1 mm high. The upper canine is characterised by a developed posterior secondary cusp. The taxon has two upper and lower premolars and its lower molars are myotodont ".
description: Published as part of Mou, Xin, Li, Mei, Li, Biao, Luo, Xiong & Li, Song, 2024, New record of Joffre's pipistrelle, Mirostrellus joffrei (Chiroptera, Vespertilionidae), in China, pp. e 120923 in Biodiversity Data Journal 12 on page e120923, DOI: 10.3897/BDJ.12.e120923
Time-frequency resolved ultrafast spectroscopy techniques using wavelet analysis
Creators: name: Prior, Javier
name: Castro, Enrique
name: Chin, Alex W.
name: Almeida, Javier
name: Huelga, Susana F.
name: Plenio, Martin B.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: New experimental techniques based on non-linear ultrafast spectroscopies have been developed over the last few years, and have been demonstrated to provide powerful probes of quantum dynamics in different types of molecular aggregates, including both natural and artificial light harvesting complexes. Fourier transform-based spectroscopies have been particularly successful, yet 'complete' spectral information normally necessitates the loss of all information on the temporal sequence of events in a signal. This information though is particularly important in transient or multi-stage processes, in which the spectral decomposition of the data evolves in time. By going through several examples of ultrafast quantum dynamics, we demonstrate that the use of wavelets provide an efficient and accurate way to simultaneously acquire both temporal and frequency information about a signal, and argue that this greatly aids the elucidation and interpretation of physical process responsible for non-stationary spectroscopic features, such as those encountered in coherent excitonic energy transport.
description: 8 pages, 8 figures
Flore d'Afrique centrale - Spermatophyta - Resedaceae
Creators: name: Robyns, W.
Publisher: name: Zenodo
Year: 1951
Subjects: Flora
Plants
Identification
Botany
Systematics
Taxonomy
Central Africa
Democratic Republic of the Congo
Rwanda
Burundi

description: PDF version of treatment of Resedaceae in Flore d'Afrique centrale series
Generation of phase-matched circularly-polarized extreme ultraviolet high harmonics for magnetic circular dichroism spectroscopy
Creators: name: Kfir, Ofer
name: Grychtol, Patrik
name: Turgut, Emrah
name: Knut, Ronny
name: Zusin, Dmitriy
name: Popmintchev, Dimitar
name: Popmintchev, Tenio
name: Nembach, Hans
name: Shaw, Justin M.
name: Fleischer, Avner
name: Kapteyn, Henry
name: Murnane, Margaret
name: Cohen, Oren
Publisher: name: arXiv
Year: 2014
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Circularly-polarized extreme UV and X-ray radiation provides valuable access to the structural, electronic and magnetic properties of materials. To date, this capability was available only at large-scale X-ray facilities such as synchrotrons. Here we demonstrate the first bright, phase-matched, extreme UV circularly-polarized high harmonics and use this new light source for magnetic circular dichroism measurements at the M-shell absorption edges of Co. We show that phase matching of circularly-polarized harmonics is unique and robust, producing a photon flux comparable to the linearly polarized high harmonic sources that have been used very successfully for ultrafast element-selective magneto-optic experiments. This work thus represents a critical advance that makes possible element-specific imaging and spectroscopy of multiple elements simultaneously in magnetic and other chiral media with very high spatial and temporal resolution, using tabletop-scale setups.
description: 12 text pages, 4 figures, supplamentary information 6 pages
Programmable time-frequency mode-sorting of single photons with a multi-output quantum pulse gate
Creators: name: Serino, Laura
name: Eigner, Christof
name: Brecht, Benjamin
name: Silberhorn, Christine
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We demonstrate a high-dimensional mode-sorter for single photons based on a multi-output quantum pulse gate, which we can program to switch between different temporal-mode encodings including pulse modes, frequency bins, time bins, and their superpositions. This device can facilitate practical realizations of quantum information applications such as high-dimensional quantum key distribution, and thus enables secure communication with enhanced information capacity. We characterize the mode-sorter through a detector tomography in 3 and 5 dimensions and find a fidelity up to $0.958\pm 0.030$ at the single-photon level.
Flore d'Afrique centrale - Spermatophyta - Lauraceae
Creators: name: Robyns, W.
name: Wilczek, R.
Publisher: name: Zenodo
Year: 1951
Subjects: Flora
Plants
Identification
Botany
Systematics
Taxonomy
Central Africa
Democratic Republic of the Congo
Rwanda
Burundi

description: PDF version of treatment of Lauraceae in Flore d'Afrique centrale series
title: Gut Regiment; [1919]
title: zwölf Sätze für unsere evangelischen Glaubensgenossen
titleType: Subtitle
Creators: name: (:Unav)
Publisher: name: Universitätsbibliothek der Ludwig-Maximilians-Universität München
Year: 2009

description: Wahlempfehlung zu Gunsten von Bayerischer Volkspartei, Deutscher Volkspartei, Nationalliberaler Partei und Mittelpartei
The geometry and evolution of the boiling zone that produced the Favona ore bodies in the Hauraki Goldfield, and the implications for exploration

Publisher: name: GNS Science
Year: 2019

description: The Favona-Moonlight vein extends for ~1000 m, covers a vertical interval of at least 400 m, and is up to 25 m in width. The structure forms a dense network of sub-parallel veins that anastomose and branch upward and pinch out at 50–100 m below the current surface. The structure hosts three discrete ore zones, which are approximately 150 m high and about 200 m in length, and which occur in the widest segments of the vein system. In these ore zones, veins are primarily filled with quartz that show a wide range of textures (banded, breccia, massive) resulting from pulses of very strong to quiescent fluid flow associated with particle transport and sedimentation. On the fringes of ore zones, vein fill is predominantly made of lattice quartz, and precious metal mineralisation is poorly developed to non-existent. The vein mineral zonation pattern is interpreted in the light of boiling fluid flow in geothermal wells, where the same minerals deposit and the same mineralogic textures develop. Lattice calcite and its quartz pseudomorph equivalent are key indicators of the base level of the boiling zone, which clearly fluctuated along the Favona-Moonlight structure during episodes of vein filling. Deep levels of boiling prevailed beneath ore zones during their formation, whereas outside the ore zone, shallow levels of boiling predominated. This interpretation is consistent with patterns of mineralisation in geothermal wells, where the gold-silver interval occurs several hundred metres above the base of the boiling zone. Accordingly, gold-silver grades correlate poorly with occurrences of lattice textures along the Favona-Moonlight structure. This finding should give explorers confidence to fully test the along strike potential of structures even where vein intervals are dominated by quartz lattice textures and barren or poorly mineralised in precious metals. (auth)
Early childhood education practices for emotional wellbeing: a study of Rohingya and Venezuelan refugee communities
Creators: name: Gross, Allison Leigh
name: Correa Gomes, Renata
Publisher: name: Stanford Digital Repository
Year: 2022
Subjects: subject: Early childhood education
subject: Refugee camps
subject: Emotional needs
subject: Trauma-informed practices
subject: Conflict-sensitive education
subject: Stanford Graduate School of Education International Education Policy Analysis

description: Adverse experiences, such as forced displacement, that occur in early childhood can subject children to the consequences of trauma, and can have lasting negative effects on a child’s development and wellbeing. The purpose of this study is to investigate how early childhood education workers from two non-governmental organizations operating within refugee camps in Bangladesh and Brazil perceive the causes of emotional challenges children face and how they support the emotional needs of the children they work with. In-depth interviews were conducted with 10 participants in each case study. Findings point to the importance of understanding the root causes of children’s emotional distress. In addition, the trauma-informed practices education workers used in both scenarios are inextricably linked to cultural nuances in each site—from the ways one identifies when a child is in need, builds trusting and affectionate relationships, acts in a culturally-responsive manner, employs conflict-sensitive education strategies, and engages the community in investing and sharing responsibility towards the child. Based on these findings, we recommend policies surrounding harm reduction, community engagement, the creation of safe spaces for children to play, the deliverance of basic needs, and increased consciousness surrounding the delicate and unique nature of a child’s traumas.
Computational methods to analyze and predict the binding mode of inhibitors targeting both human and mushroom tyrosinase
Creators: name: Ricci, Federico
name: Schira, Kristina
name: Khettabi, Lyna
name: Lombardo, Lisa
name: Mirabile, Salvatore
name: Gitto, Rosaria
name: Soler-Lopez, Montserrat
name: Scheuermann, Jörg
name: Wolber, Gerhard
name: De Luca, Laura
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Computational methods
subject: 4-(4-hydroxyphenyl)piperazin-1-yl-derivatives
subject: Human tyrosinase
subject: Mushroom tyrosinase
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie

description: Tyrosinase, a copper-containing enzyme critical in melanin biosynthesis, is a key drug target for hyperpigmentation and melanoma in humans. Testing the inhibitory effects of compounds using tyrosinase from Agaricus bisporus (AbTYR) has been a common practice to identify potential therapeutics from synthetic and natural sources. However, structural diversity among human tyrosinase (hTYR) and AbTYR presents a challenge in developing drugs that are therapeutically effective. In this study, we combined retrospective and computational analyses with experimental data to provide insights into the development of new inhibitors targeting both hTYR and AbTYR. We observed contrasting effects of Thiamidol™ and our 4-(4-hydroxyphenyl)piperazin-1-yl-derivative (6) on both enzymes; based on this finding, we aimed to investigate their binding modes in hTYR and AbTYR to identify residues that significantly improve affinity. All the information led to the discovery of compound [4-(4-hydroxyphenyl)piperazin-1-yl](2-methoxyphenyl)methanone (MehT-3, 7), which showed comparable activity on AbTYR (IC50 = 3.52 μM) and hTYR (IC50 = 5.4 μM). Based on these achievements we propose the exploitation of our computational results to provide relevant structural information for the development of newer dual-targeting molecules, which could be preliminarily tested on AbTYR as a rapid and inexpensive screening procedure before being tested on hTYR.
The fission yeast Stn1-Ten1 complex limits telomerase activity via its SUMO-interacting motif and promotes telomeres replication
Creators: name: Matmati, Samah
name: Vaurs, Mélina
name: Escandell, José M
name: Maestroni, Laetitia
name: Nakamura, Toru
name: Ferreira, Miguel G
name: Géli, Vincent
name: Coulon, Stéphane
Publisher: name: University of Illinois at Chicago
Year: 2022
Subjects: Uncategorized

description: Mammalian CST (CTC1-STN1-TEN1) complex fulfills numerous functions including rescue of the stalled replication forks and termination of telomerase action. In fission yeast lacking the CTC1 ortholog, the Stn1-Ten1 complex restricts telomerase action via its sumoylation-mediated interaction with Tpz1TPP1. We identify a small ubiquitin-like modifier (SUMO)-interacting motif (SIM) in the carboxyl-terminal part of Stn1 and show that this domain is crucial for SUMO and Tpz1-SUMO interactions. Point mutations in the SIM (Stn1-226) lead to telomere elongation, impair Stn1-Ten1 recruitment to telomeres, and enhance telomerase binding, revealing that Stn1 SIM domain contributes to the inhibition of telomerase activity at chromosome ends. Our results suggest that Stn1-Ten1 promotes DNA synthesis at telomeres to limit single-strand DNA accumulation. We further demonstrate that Stn1 functions in the replication of telomeric and subtelomeric regions in a Taz1-independent manner. Genetic analysis reveals that misregulation of origin firing and/or telomerase inhibition circumvents the replication defects of the stn1-226 mutant. Together, our results show that the Stn1-Ten1 complex has a dual function at telomeres by limiting telomerase action and promoting chromosome end replication.
Flore d'Afrique centrale - Spermatophyta - Hernandiaceae
Creators: name: Boutique, R.
Publisher: name: Zenodo
Year: 1951
Subjects: Flora
Plants
Identification
Botany
Systematics
Taxonomy
Central Africa
Democratic Republic of the Congo
Rwanda
Burundi

description: PDF version of treatment of Hernandiaceae in Flore d'Afrique centrale series
Local-photon model of the momentum of light
Creators: name: Waite, Gabriel
name: Hodgson, Daniel
name: Lang, Ben
name: Alapatt, Varghese
name: Beige, Almut
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Recently we introduced a local photon approach for modelling the quantised electromagnetic field in position space. Using this approach, we define the momentum of light in this paper as in quantum mechanics as the generator for spatial translation. Afterwards, we analyse the momentum dynamics of photonic wave packets which transition from air into a denser dielectric medium. Our analysis shines new light onto the Abraham-Minkowski controversy which highlights the intricacies involved in the characterisation of the momentum of the electromagnetic field. Although our results align with Minkowski's theory and with the definition of the canonical momentum of light in quantum electrodynamics, there are also some crucial differences.
description: 15 pages, 2 figures, new title, accepted version
Second order error bounds for POD-ROM methods based on first order divided differences
Creators: name: García-Archilla, Bosco
name: John, Volker
name: Novo, Julia
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Heat equation
subject: POD-ROM methods
subject: BDF2
subject: Pointwise error estimates
subject: 500 Naturwissenschaften und Mathematik::510 Mathematik::510 Mathematik

description: This note proves for the heat equation that using BDF2 as time stepping scheme in POD-ROM methods with snapshots based on difference quotients gives both the optimal second order error bound in time and pointwise estimates.
Extended Connectors: Structuring Glue Operators in BIP
Creators: name: Baranov, Eduard
name: Bliudze, Simon
Publisher: name: arXiv
Year: 2013
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Programming Languages (cs.PL)
subject: Software Engineering (cs.SE)
subject: FOS: Computer and information sciences

description: Based on a variation of the BIP operational semantics using the offer predicate introduced in our previous work, we extend the algebras used to model glue operators in BIP to encompass priorities. This extension uses the Algebra of Causal Interaction Trees, T(P), as a pivot: existing transformations automatically provide the extensions for the Algebra of Connectors. We then extend the axiomatisation of T(P), since the equivalence induced by the new operational semantics is weaker than that induced by the interaction semantics. This extension leads to canonical normal forms for all structures and to a simplification of the algorithm for the synthesis of connectors from Boolean coordination constraints.
description: In Proceedings ICE 2013, arXiv:1310.4019
Atomistic analysis of nematic phase transition in 4-cyano-4$^{\prime}$-$n$-alkyl biphenyl liquid crystals: Sampling for the first-order phase transition and the free-energy decomposition
Creators: name: Ogita, Shunsuke
name: Ishii, Yoshiki
name: Watanabe, Go
name: Washizu, Hitoshi
name: Kim, Kang
name: Matubayasi, Nobuyuki
Publisher: name: arXiv
Year: 2024
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: Molecular dynamics (MD) simulations were conducted using the generalized replica exchange method (gREM) on the 4-cyano-4$^{\prime}$-$n$-alkylbiphenyl ($n$CB) system with $n=5$, 6, 7, and 8, which exhibits a nematic-isotropic (NI) phase transition. Sampling near the phase transition temperature in systems undergoing first-order phase transitions, such as the NI phase transition, is demanding due to the substantial energy gap between the two phases. To address this, gREM, specifically designed for first-order phase transitions, was utilized to enhance sampling near the NI phase transition temperature. Free-energy calculations based on the energy representation (ER) theory were employed to characterize the NI phase transition. ER evaluates the insertion free energy of $n$CB molecule for both nematic and isotropic phases, revealing a change in the temperature dependence across the NI phase transition. Further decomposition into intermolecular interaction energetic and entropic terms shows quantitatively the balance between these contributions at the NI phase transition temperature.
description: 9 pages, 5 figures for main text, 8 pages for Supplementary Material
Unraveling the kinetics and pharmacology of human PepT1 using solid supported membrane-based electrophysiology
Creators: name: Körner, Alexander
name: Bazzone, Andre
name: Wichert, Maximilian
name: Barthmes, Maria
name: Dondapati, Srujan Kumar
name: Fertig, Niels
name: Kubick, Stefan
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: Membrane transport
subject: Peptide Transporter 1 (PepT1)
subject: Solid Supported Membrane-based Electrophysiology (SSME)
subject: Biosensor
subject: Pharmacology
subject: High‐throughput screening (HTS)
subject: 500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie

description: The human Peptide Transporter 1 (hPepT1) is known for its broad substrate specificity and its ability to transport (pro-)drugs. Here, we present an in-depth comprehensive study of hPepT1 and its interactions with various substrates via solid supported membrane-based electrophysiology (SSME). Using hPepT1-containing vesicles, we could not identify any peptide induced pre-steady-state currents, indicating that the recorded peak currents reflect steady-state transport. Electrogenic co-transport of H+/glycylglycine (GlyGly) was observed across a pH range of 5.0 to 9.0. The pH dependence is described by a bell-shaped activity curve and two pK values. KM and relative Vmax values of various canonical and non-canonical peptide substrates were contextualized with current mechanistic understandings of hPepT1. Finally, specific inhibition was observed for various inhibitors in a high throughput format, and IC50 values are reported. Taken together, these findings contribute to promoting the design and analysis of pharmacologically relevant substances.
Charge dynamics in molecular junctions: Nonequilibrium Green's Function approach made fast
Creators: name: Latini, S.
name: Perfetto, E.
name: Uimonen, A. -M.
name: van Leeuwen, R.
name: Stefanucci, G.
Publisher: name: arXiv
Year: 2013
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Real-time Green's function simulations of molecular junctions (open quantum systems) are typically performed by solving the Kadanoff-Baym equations (KBE). The KBE, however, impose a serious limitation on the maximum propagation time due to the large memory storage needed. In this work we propose a simplified Green's function approach based on the Generalized Kadanoff-Baym Ansatz (GKBA) to overcome the KBE limitation on time, significantly speed up the calculations, and yet stay close to the KBE results. This is achieved through a twofold advance: first we show how to make the GKBA work in open systems and then construct a suitable quasi-particle propagator that includes correlation effects in a diagrammatic fashion. We also provide evidence that our GKBA scheme, although already in good agreement with the KBE approach, can be further improved without increasing the computational cost.
description: 13 pages, 13 figures
title: Αθλητικός τουρισμός στο νησί της Ρόδου
title: Sport tourism in Rhodes island
titleType: AlternativeTitle
Creators: name: Πότσου, Ευαγγελία
Publisher: name: Πανεπιστήμιο Πελοποννήσου
Year: 2023
Subjects: subject: Αθλητισμός και τουρισμός - Διοίκηση και οργάνωση
subject: Αθλητισμός και τουρισμός
subject: Αθλητισμός και τουρισμός - Οικονομικές απόψεις
subject: Εναλλακτικός τουρισμός
subject: Sports and tourism - Management
subject: Sports and tourism
subject: Sports and tourism - Economic aspects
subject: Alternative tourism
subject: Ρόδος
subject: Αθλητικός τουρισμός
subject: Οικονομία
subject: Ανάπτυξη
subject: Εναλλακτικές μορφές τουρισμού
subject: Rhodes
subject: Sport tourism
subject: Economy
subject: Development
subject: Alternative forms of tourism

description: Στην εποχή μας, ο αθλητισμός και ο τουρισμός αναδεικνύονται ως δύο σημαντικοί κοινωνικο-οικονομικοί και πολιτιστικοί θεσμοί, που συχνά αλληλεπιδρούν μεταξύ τους. Στην Ελλάδα, ειδικά, διαθέτουμε πληθώρα τουριστικών προορισμών που συμβάλλουν στην προώθηση του αθλητικού τουρισμού, αποτελώντας έναν από τους βασικούς παράγοντες για την οικονομική ανάπτυξη της χώρας. Η εναλλακτική αυτή μορφή τουρισμού έχει βιώσει ιδιαίτερη άνθιση στην Ελλάδα μετά τη διεξαγωγή των Ολυμπιακών Αγώνων το 2004 και αναπτύσσεται με εντυπωσιακούς ρυθμούς. Υπάρχουν πολλές περιοχές στην Ελλάδα που μπορούν να επενδύσουν στον αθλητικό τουρισμό, και μία από αυτές είναι η Ρόδος λόγω της μορφολογίας του εδάφους και του ευνοϊκού κλίματός της. Εδώ και περίπου δύο δεκαετίες, οι φορείς του νησιού έχουν επενδύσει σε διάφορες μορφές αθλητικού τουρισμού, προσελκύοντας κάθε χρόνο χιλιάδες τουρίστες τόσο κατά τους καλοκαιρινούς μήνες όσο και κατά την εκτός σεζόν περίοδο. Με αυτόν τον τρόπο, συμβάλλουν στην επιμήκυνση της τουριστικής περιόδου, με όλα τα οφέλη που αυτό συνεπάγεται. Ο σκοπός αυτής της μελέτης, που βασίζεται σε βιβλιογραφική έρευνα, είναι να διερευνήσει την ανάπτυξη του αθλητικού τουρισμού στη Ρόδο ως έναν κινητήριο παράγοντα για την ανάπτυξη της περιοχής, καθώς και να εξετάσει τις προοπτικές που υπάρχουν για την περαιτέρω ενίσχυσή του.
Predictive Spliner: Data-Driven Overtaking in Autonomous Racing Using Opponent Trajectory Prediction
Creators: name: Baumann, Nicolas
name: Ghignone, Edoardo
name: Hu, Cheng
name: Hildisch, Benedict
name: Hämmerle, Tino
name: Bettoni, Alessandro
name: Carron, Andrea
name: Xie, Lei
name: Magno, Michele
Publisher: name: arXiv
Year: 2024
Subjects: subject: Robotics (cs.RO)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Head-to-head racing against opponents is a challenging and emerging topic in the domain of autonomous racing. We propose Predictive Spliner, a data-driven overtaking planner that learns the behavior of opponents through Gaussian Process (GP) regression, which is then leveraged to compute viable overtaking maneuvers in future sections of the racing track. Experimentally validated on a 1:10 scale autonomous racing platform using Light Detection and Ranging (LiDAR) information to perceive the opponent, Predictive Spliner outperforms State-of-the-Art (SotA) algorithms by overtaking opponents at up to 83.1% of its own speed, being on average 8.4% faster than the previous best-performing method. Additionally, it achieves an average success rate of 84.5%, which is 47.6% higher than the previous best-performing method. The method maintains computational efficiency with a Central Processing Unit (CPU) load of 22.79% and a computation time of 8.4 ms, evaluated on a Commercial off-the-Shelf (CotS) Intel i7-1165G7, making it suitable for real-time robotic applications. These results highlight the potential of Predictive Spliner to enhance the performance and safety of autonomous racing vehicles. The code for Predictive Spliner is available at: https://github.com/ForzaETH/predictive-spliner.
description: Accepted to RA-L
Spatial and temporal variations in rockwall erosion rates derived from cosmogenic 10Be in medial moraines at five valley glaciers around Pigne d'Arolla, Switzerland
Creators: name: Wetterauer, Katharina
name: Scherler, Dirk
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: rockwall erosion rates
subject: spatial variations
subject: temporal variations
subject: 500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::550 Geowissenschaften

description: Rockwall erosion in high-alpine glacial environments varies both temporally and spatially. Where rockwalls flank glaciers, changes in debris supply and supraglacial cover will modify ice ablation. Yet, quantifying spatiotemporal patterns in erosion across deglaciating rockwalls is not trivial. At five nearby valley glaciers around Pigne d'Arolla in Switzerland, we derived apparent rockwall erosion rates using 10Be cosmogenic nuclide concentrations ([10Be]) in medial moraine debris. Systematic downglacier sampling of six medial moraines that receive debris from rockwalls with differing orientation, slope, and deglaciation histories enabled us to assess rockwall erosion through time and to investigate how distinct spatial source rockwall morphology may express itself in medial moraine [10Be] records. Our dataset combines 24 new samples from medial moraines of Glacier du Brenay, Glacier de Cheilon, Glacier de Pièce, and Glacier de Tsijiore Nouve with 15 published samples from Glacier d'Otemma. For each sample, we simulated the glacial debris transport using a simple debris particle trajectory model to approximate the time of debris erosion and to correct the measured [10Be] for post-depositional 10Be accumulation. Our derived apparent rockwall erosion rates range between ∼ 0.6 and 10.0 mm yr−1. Whereas the longest downglacier [10Be] record presumably reaches back to the end of the Little Ice Age and suggests a systematic increase in rockwall erosion rates over the last ∼ 200 years, the shorter records only cover the last ∼ 100 years from the recent deglaciation period and indicate temporally more stable erosion rates. For the estimated time of debris erosion, ice cover changes across most source rockwalls were small, suggesting that our records are largely unaffected by the contribution of recently deglaciated bedrock of possibly different [10Be], but admixture of subglacially derived debris cannot be excluded at every site. Comparing our sites suggests that apparent rockwall erosion rates are higher where rockwalls are steep and north-facing, indicating a potential slope and temperature control on rockwall erosion around Pigne d'Arolla.
Scalable generation of multi-photon entangled states by active feed-forward and multiplexing
Creators: name: Meyer-Scott, Evan
name: Prasannan, Nidhin
name: Dhand, Ish
name: Eigner, Christof
name: Quiring, Viktor
name: Barkhofen, Sonja
name: Brecht, Benjamin
name: Plenio, Martin B.
name: Silberhorn, Christine
Publisher: name: arXiv
Year: 2019
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Multi-photon entangled states of light are key to advancing quantum communication, computation, and metrology. Current methods for building such states are based on stitching together photons from probabilistic sources. The probability of $N$ such sources firing simultaneously decreases exponentially with $N$, imposing severe limitations on the practically achievable number of coincident photons. We tackle this challenge with a quantum interference buffer (QIB), which combines three functionalities: firstly, it stores polarization qubits, enabling the use of polarization-entangled states as resource; secondly, it implements entangled-source multiplexing, greatly enhancing the resource-state generation rates; thirdly, it implements time-multiplexed, on-demand linear optical networks for interfering subsequent states. Using the QIB, we multiplex 21 Bell-state sources and demonstrate a nine-fold enhancement in the generation rate of four-photon GHZ states. The enhancement scales exponentially with the photon number; larger states benefit more strongly. Multiplexed photon entanglement and interference will find diverse applications in quantum photonics, allowing for practical realisations of multi-photon protocols.
description: Main: 5 pages, 3 figures; Supplement: 10 pages, 7 figures
Gelfand-Tsetlin bases of representations for super Yangian and quantum affine superalgebra
Creators: name: Lu, Kang
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics

description: We give explicit actions of Drinfeld generators on Gelfand-Tsetlin bases of super Yangian modules associated with skew Young diagrams. In particular, we give another proof that these representations are irreducible. We study irreducible tame $\mathrm Y(\mathfrak{gl}_{1|1})$-modules and show that a finite-dimensional irreducible $\mathrm Y(\mathfrak{gl}_{1|1})$-module is tame if and only if it is thin. We also give the analogous statements for quantum affine superalgebra of type A.
description: 23 pages. Final Version. To appear in Lett. Math. Phys
Synchronization of two coupled multimode oscillators with time-delayed feedback
Creators: name: Emelianova, Yulia P.
name: Emelyanov, Valeriy V.
name: Ryskin, Nikita M.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Chaotic Dynamics (nlin.CD)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: Effects of synchronization in a system of two coupled oscillators with time-delayed feedback are investigated. Phase space of a system with time delay is infinite-dimensional. Thus, the picture of synchronization in such systems acquires many new features not inherent to finite-dimensional ones. A picture of oscillation modes in cases of identical and non-identical coupled oscillators is studied in detail. Periodical structure of amplitude death and "broadband synchronization" zones is investigated. Such a behavior occurs due to the resonances between different modes of the infinite-dimensional system with time delay.
description: 19 pages, 10 figures
Mechanisms of electrostatic interactions between two charged dielectric spheres inside a polarizable medium: An effective-dipole analysis
Creators: name: Duan, Yanyu
name: Gan, Zecheng
name: Chan, Ho-Kei
Publisher: name: arXiv
Year: 2024
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: The mechanisms of electrostatic interactions between two charged dielectric spheres inside a polarizable medium have been investigated, in terms of hypothetical effective dipoles that depict how the positive and negative charge in each particle are separated. Our findings, which revealed that it is possible for polarization-induced opposite-charge repulsion to occur at short interparticle separations if the dielectric constant of the medium is greater than the dielectric constants of both spheres, provide insights into the physics of charge separation in each sphere and of polarization in the medium behind such counterintuitive behaviour.
description: 14 pages, 10 figures, Soft Matter, https://pubs.rsc.org/en/content/articlelanding/2025/sm/d4sm01155d
Plugging into the global jihad : a critical appraisal of American counterterrorism policy in Sub-Saharan Africa from 1991-2017
Creators: name: Crawford, Peter R.
name: 0000-0002-0734-7424
Publisher: name: The University of Texas at Austin
Year: 2022
Subjects: Counterterrorism
Africa

description: This critical appraisal of United States counterterrorism policy in Sub-Saharan Africa traces the breadth of the United States counterterrorism experience in Sub-Saharan Africa from 1991 until 2017 within the context of the overall conflicts. It does so via three case studies of the most significant Salafi jihadist insurgencies during this time. The three case studies are based around the United States efforts to counter Salafi jihadists in three separate conflicts. The first case addresses the conglomeration of groups in the Sahel now associated with the al Qaeda affiliate Jama'at Nasr al-Islam wal Muslimin and the Islamic State groups in the region. The second focuses on Boko Haram in Nigeria and the Lake Chad basin, and the third on al Shabaab in Somalia and the Horn of Africa. The United States played an important but supporting role in these conflicts. This appraisal assembles and details that role, places it within the larger conflict, analyzes the factors that shaped the policy decided upon, evaluates the outcomes achieved and then provides recommendations for future United States counterterrorism policy in Africa.
On Context Bisimulation for Parameterized Higher-order Processes
Creators: name: Xu, Xian
Publisher: name: arXiv
Year: 2013
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Computer Science and Game Theory (cs.GT)
subject: FOS: Computer and information sciences

description: This paper studies context bisimulation for higher-order processes, in the presence of parameterization (viz. abstraction). We show that the extension of higher-order processes with process parameterization retains the characterization of context bisimulation by a much simpler form of bisimulation called normal bisimulation (viz. they are coincident), in which universal quantifiers are eliminated; whereas it is not the same with name parameterization. These results clarify further the bisimulation theory of higher-order processes, and also shed light on the essential distinction between the two kinds of parameterization.
description: In Proceedings ICE 2013, arXiv:1310.4019
Bethe ansatz equations for orthosymplectic Lie superalgebras and self-dual superspaces
Creators: name: Lu, Kang
name: Mukhin, Evgeny
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We study solutions of the Bethe ansatz equations associated to the orthosymplectic Lie superalgebras $\mathfrak{osp}_{2m+1|2n}$ and $\mathfrak{osp}_{2m|2n}$. Given a solution, we define a reproduction procedure and use it to construct a family of new solutions which we call a population. To each population we associate a symmetric rational pseudo-differential operator $\mathcal R$. Under some technical assumptions, we show that the superkernel $W$ of $\mathcal R$ is a self-dual superspace of rational functions, and the population is in a canonical bijection with the variety of isotropic full superflags in $W$ and with the set of symmetric complete factorizations of $\mathcal R$. In particular, our results apply to the case of even Lie algebras of type D${}_m$ corresponding to $\mathfrak{osp}_{2m|0}=\mathfrak{so}_{2m}$.
description: 34 pages
Coordination of Tetracyanoquinodimethane-Derivatives with Tris(pentafluorophenyl)borane Provides Stronger p-Dopants with Enhanced Stability
Creators: name: Mansour, Ahmed E.
name: Warren, Ross
name: Lungwitz, Dominique
name: Forster, Michael
name: Scherf, Ullrich
name: Opitz, Andreas
name: Malischewski, Moritz
name: Koch, Norbert
Publisher: name: Freie Universität Berlin
Year: 2023
Subjects: subject: organic semiconductor
subject: doping
subject: dopants
subject: thin films
subject: charge transport
subject: 500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften

description: Strong molecular dopants for organic semiconductors that are stable against diffusion are in demand, enhancing the performance of organic optoelectronic devices. The conventionally used p-dopants based on 7,7,8,8-tetracyanoquinodimethane (TCNQ) and its derivatives “FxTCN(N)Q”, such as 2,3,4,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) and 1,3,4,5,7,8-hexafluorotetracyano-naphthoquinodimethane (F6TCNNQ), feature limited oxidation strength, especially for modern polymer semiconductors with high ionization energy (IE). These small molecular dopants also exhibit pronounced diffusion in the polymer hosts. Here, we demonstrate a facile approach to increase the oxidation strength of FxTCN(N)Q by coordination with four tris(pentafluorophenyl)borane (BCF) molecules using a single-step solution mixing process, resulting in bulky dopant complexes “FxTCN(N)Q-4(BCF)”. Using a series of polymer semiconductors with IE up to 5.9 eV, we show by optical absorption spectroscopy of solutions and thin films that the efficiency of doping using FxTCN(N)Q-4(BCF) is significantly higher compared to that using FxTCN(N)Q or BCF alone. Electrical transport measurements with the prototypical poly(3-hexylthiophene-2,5-diyl) (P3HT) confirm the higher doping efficiency of F4TCNQ-4(BCF) compared to F4TCNQ. Additionally, the bulkier structure of F4TCNQ-4(BCF) is shown to result in higher stability against drift in P3HT under an applied electric field as compared to F4TCNQ. The simple approach of solution-mixing of readily accessible molecules thus offers access to enhanced molecular p-dopants for the community.
Introducing Pietarinen expansion method into single-channel pole extraction problem
Creators: name: Svarc, Alfred
name: Hadzimehmedovic, Mirza
name: Osmanovic, Hedim
name: Stahov, Jugoslav
name: Tiator, Lothar
name: Workman, Ron L.
Publisher: name: arXiv
Year: 2013
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We present a new approach to quantifying pole parameters of single-channel processes based on a Laurent expansion of partial-wave T-matrices in the vicinity of the real axis. Instead of using the conventional power-series description of the non-singular part of the Laurent expansion, we represent this part by a convergent series of Pietarinen functions. As the analytic structure of the non-singular part is usually very well known (physical cuts with branch points at inelastic thresholds, and unphysical cuts in the negative energy plane), we find that one Pietarinen series per cut represents the analytic structure fairly reliably. The number of terms in each Pietarinen series is determined by the quality of the fit. The method is tested in two ways: on a toy model constructed from two known poles, various background terms, and two physical cuts, and on several sets of realistic piN elastic energy-dependent partial-wave amplitudes (GWU/SAID - [1, 2], and Dubna-Mainz-Taipei - [3, 4]). We show that the method is robust and confident using up to three Pietarinen series, and is particularly convenient in fits to amplitudes, such as single-energy solutions, coming more directly from experiment; cases where the analytic structure of the regular part is apriori unknown.
description: 15 pages, 7 figures, 3 tables. arXiv admin note: text overlap with arXiv:1212.1295
Flore d'Afrique centrale - Spermatophyta - Moringaceae
Creators: name: Robyns, W.
Publisher: name: Zenodo
Year: 1951
Subjects: Flora
Plants
Identification
Botany
Systematics
Taxonomy
Central Africa
Democratic Republic of the Congo
Rwanda
Burundi

description: PDF version of treatment of Moringaceae in Flore d'Afrique centrale series
Flore d'Afrique centrale - Spermatophyta - Droseraceae
Creators: name: Taton, A.
Publisher: name: Zenodo
Year: 1951
Subjects: Flora
Plants
Identification
Botany
Systematics
Taxonomy
Central Africa
Democratic Republic of the Congo
Rwanda
Burundi

description: PDF version of treatment of Droseraceae in Flore d'Afrique centrale series
The First Circumstellar Disk Imaged in Silhouette with Adaptive Optics: MagAO Imaging of Orion 218-354
Creators: name: Follette, Katherine B.
name: Close, Laird M.
name: Males, Jared R.
name: Kopon, Derek
name: Wu, Ya-Lin
name: Morzinski, Katie M.
name: Hinz, Philip
name: Rodigas, Timothy J.
name: Puglisi, Alfio
name: Esposito, Simone
name: Riccardi, Armando
name: Pinna, Enrico
name: Xompero, Marco
name: Briguglio, Runa
Publisher: name: arXiv
Year: 2013
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present high resolution adaptive optics (AO) corrected images of the silhouette disk Orion 218-354 taken with Magellan AO (MagAO) and its visible light camera, VisAO, in simultaneous differential imaging (SDI) mode at H-alpha. This is the first image of a circumstellar disk seen in silhouette with adaptive optics and is among the first visible light adaptive optics results in the literature. We derive the disk extent, geometry, intensity and extinction profiles and find, in contrast with previous work, that the disk is likely optically-thin at H-alpha. Our data provide an estimate of the column density in primitive, ISM-like grains as a function of radius in the disk. We estimate that only ~10% of the total sub-mm derived disk mass lies in primitive, unprocessed grains. We use our data, Monte Carlo radiative transfer modeling and previous results from the literature to make the first self-consistent multiwavelength model of Orion 218-354. We find that we are able to reproduce the 1-1000micron SED with a ~2-540AU disk of the size, geometry, small vs. large grain proportion and radial mass profile indicated by our data. This inner radius is a factor of ~15 larger than the sublimation radius of the disk, suggesting that it is likely cleared in the very interior.
description: 14 pages, 4 figures, ApJL accepted