cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
TIC 308396022: a $δ$ Scuti--$γ$ Doradus hybrid with large-amplitude radial fundamental mode and regular g-mode period spacing
Creators: name: Yang, Tao-Zhi
name: Zuo, Zhao-Yu
name: Li, Gang
name: Bedding, Timothy R
name: Murphy, Simon J
name: Joyce, Meridith
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We analyse the pulsating behaviour of TIC 308396022 observed by the TESS mission. The star is a high-amplitude $δ$ Sct star (HADS) that shows a very rich amplitude spectrum using the 3-yr light curve. Among these frequencies, the strongest peak of $f_{1}= 13.20362567(12) \rm{d^{-1}}$ is identified as the radial fundamental mode, and we also find the first and second overtones ($f_2$ and $f_3$). In the low frequency range (< 2.5 $\rm{d^{-1}}$), 22 peaks are identified to be gravity modes, which show a regular period spacing of about 2460\,s and have the angular degree $l = 1$. The period spacing pattern does not show a significant downward trend, suggesting the star rotates slowly. We note that this is a $δ$ Sct--$γ$ Dor hybrid star containing a high-amplitude radial fundamental mode and a regular g-mode period spacing pattern. With O-C analysis, we find the star shows a significant time delay, implying that the star has a companion which is likely to be a white dwarf. The history of possible mass transfer provides a great opportunity to test the current theories of binary evolution, mass transfer, and pulsation.
description: Accepted by A&A
Bioimaging of animal embryogenesis:
mathematical methods and computational algorithms
Creators: name: Rizzi, Barbara <1973>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2009
Subjects: ING-INF/06 Bioingegneria elettronica e informatica

description: Some fundamental biological processes such as embryonic development have been preserved
during evolution and are common to species belonging to different phylogenetic
positions, but are nowadays largely unknown. The understanding of cell morphodynamics
leading to the formation of organized spatial distribution of cells such as tissues
and organs can be achieved through the reconstruction of cells shape and position during
the development of a live animal embryo. We design in this work a chain of image
processing methods to automatically segment and track cells nuclei and membranes
during the development of a zebrafish embryo, which has been largely validates as
model organism to understand vertebrate development, gene function and healingrepair
mechanisms in vertebrates. The embryo is previously labeled through the ubiquitous
expression of fluorescent proteins addressed to cells nuclei and membranes, and
temporal sequences of volumetric images are acquired with laser scanning microscopy.
Cells position is detected by processing nuclei images either through the generalized
form of the Hough transform or identifying nuclei position with local maxima after a
smoothing preprocessing step. Membranes and nuclei shapes are reconstructed by using
PDEs based variational techniques such as the Subjective Surfaces and the Chan Vese
method. Cells tracking is performed by combining informations previously detected
on cells shape and position with biological regularization constraints. Our results are
manually validated and reconstruct the formation of zebrafish brain at 7-8 somite stage
with all the cells tracked starting from late sphere stage with less than 2% error for
at least 6 hours. Our reconstruction opens the way to a systematic investigation of
cellular behaviors, of clonal origin and clonal complexity of brain organs, as well as the
contribution of cell proliferation modes and cell movements to the formation of local
patterns and morphogenetic fields.
On random topological Markov chains with big images and preimages
Creators: name: Stadlbauer, Manuel
Publisher: name: arXiv
Year: 2009
Subjects: subject: Dynamical Systems (math.DS)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 37D35, 37H99

description: We introduce a relative notion of the 'big images and preimages'-property for random topological Markov chains. This then implies that a relative version of the Ruelle-Perron-Frobenius theorem holds with respect to summable and locally Hoelder continuous potentials.
description: Corrected and extended version of the article published in Stochastics and Dynamics 2010
title: Aktuelle Forschungsfragen und Herausforderungen bei der Umsetzung des Integrierten Wasserresourcenmanagements unter Wasserknappheit
Creators: name: Hack, Jochen
name: Siegel, Katja
name: Disse, Markus
name: Evers, Mariele
name: Taft, Linda
name: Heinz, Ingo
name: Schulte, Achim
name: Reinhardt-Imjela, Christian
name: Krois, Joachim
name: Breuer, Lutz
name: Multsch, Sebastian
name: Schütze, Nils
Publisher: name: Bundesanstalt für Gewässerkunde
Year: 2021

description: Die praktische Umsetzung eines Integrierten Wasserressourcen Managements (IWRM) stellt weltweit nach wie vor eine große Herausforderung für Praxis und Forschung dar. Die kürzlich verabschiedete Globale Nachhaltigkeitsagenda 2030 macht dies mit ihren Unterzielen erneut deutlich und hebt zudem die Herausforderungen bei der Reduzierung der Zahl der unter Wasserknappheit leidenden Menschen hervor. Der Arbeitskreis (AK) „Integriertes Wasserressourcenmanagement unter Wasserknappheit“ der Deutschen Hydrologischen Gesellschaft(DHG) befasst sich mit dieser Thematik und gibt in diesem Beitrag einen Überblick über aktuelle Forschungsfragen und Herausforderungen bei der Umsetzung des Integrierten Wasserressourcenmanagements unter Wasserknappheit. Zunächst werden einige IWRM-Forschungsprojekte, die von den AK-Mitgliedern aktuell in verschiedenen Ländern und Klimazonen durchgeführt wurden, vorgestellt und in Hinblick auf die dabei gewonnenen Erkenntnisse analysiert. Daraus werden anschließend einige wissenschaftliche und praktische Herausforderungen bei der Umsetzung von IWRM zusammenfassend diskutiert und zukünftige Forschungsperspektiven für den AK abgeleitet.
A Meta-Learning-based Trajectory Tracking Framework for UAVs under Degraded Conditions
Creators: name: Yel, Esen
name: Bezzo, Nicola
Publisher: name: arXiv
Year: 2021
Subjects: subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Due to changes in model dynamics or unexpected disturbances, an autonomous robotic system may experience unforeseen challenges during real-world operations which may affect its safety and intended behavior: in particular actuator and system failures and external disturbances are among the most common causes of degraded mode of operation. To deal with this problem, in this work, we present a meta-learning-based approach to improve the trajectory tracking performance of an unmanned aerial vehicle (UAV) under actuator faults and disturbances which have not been previously experienced. Our approach leverages meta-learning to train a model that is easily adaptable at runtime to make accurate predictions about the system's future state. A runtime monitoring and validation technique is proposed to decide when the system needs to adapt its model by considering a data pruning procedure for efficient learning. Finally, the reference trajectory is adapted based on future predictions by borrowing feedback control logic to make the system track the original and desired path without needing to access the system's controller. The proposed framework is applied and validated in both simulations and experiments on a faulty UAV navigation case study demonstrating a drastic increase in tracking performance.
description: 2021 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) (to appear) 2021 copyright IEEE
On the nature of pulse profile variations and timing noise in accreting millisecond pulsars
Creators: name: Poutanen, Juri
name: Ibragimov, Askar
name: Annala, Marja
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Timing noise in the data on accretion-powered millisecond pulsars (AMP) appears as irregular pulse phase jumps on timescales from hours to weeks. A large systematic phase drift is also observed in the first discovered AMP SAX J1808.4-3658. To study the origin of these timing features, we use here the data of the well studied 2002 outburst of SAX J1808.4-3658. We develop first a model for pulse profile formation accounting for the screening of the antipodal emitting spot by the accretion disk. We demonstrate that the variations of the visibility of the antipodal spot associated with the receding accretion disk cause a systematic shift in Fourier phases, observed together with the changes in the pulse form. We show that a strong secondary maximum can be observed only in a narrow intervals of inner disk radii, which explains the very short appearance of the double-peaked profiles in SAX J1808.4-3658. By directly fitting the pulse profile shapes with our model, we find that the main parameters of the emitting spot such as its mean latitude and longitude as well as the emissivity pattern change irregularly causing small shifts in pulse phase, and the strong profile variations are caused by the increasing inner disk radius. We finally notice that significant variations in the pulse profiles in the 2002 and 2008 outbursts of SAX J1808.4-3658 happen at fluxes differing by a factor of 2, which can be explained if the inner disk radius is not a simple function of the accretion rate, but depends on the previous history.
description: 4 pages, 3 figures; ApJ Letters, in press
LightChain: Scalable DHT-Based Blockchain
Creators: name: Hassanzadeh-Nazarabadi, Yahya
name: Küpçü, Alptekin
name: Özkasap, Öznur
Publisher: name: arXiv
Year: 2021
Subjects: subject: Distributed, Parallel, and Cluster Computing (cs.DC)
subject: Cryptography and Security (cs.CR)
subject: FOS: Computer and information sciences

description: As an append-only distributed database, blockchain is utilized in a vast variety of applications including the cryptocurrency and Internet-of-Things (IoT). The existing blockchain solutions show downsides in communication and storage scalability, as well as decentralization. In this article, we propose LightChain , which is the first blockchain architecture that operates over a Distributed Hash Table (DHT) of participating peers. LightChain is a permissionless blockchain that provides addressable blocks and transactions within the network, which makes them efficiently accessible by all peers. Each block and transaction is replicated within the DHT of peers and is retrieved in an on-demand manner. Hence, peers in LightChain are not required to retrieve or keep the entire ledger. LightChain is fair as all of the participating peers have a uniform chance of being involved in the consensus regardless of their influence such as hashing power or stake. We provide formal mathematical analysis and experimental results (simulations and cloud deployment) to demonstrate the security, efficiency, and fairness of LightChain , and show that LightChain is the only existing blockchain that can provide integrity under the corrupted majority power of peers. As we experimentally demonstrate, compared to the mainstream blockchains such as Bitcoin and Ethereum, LightChain requires around 66 times smaller per node storage, and is around 380 times faster on bootstrapping a new node to the system, and each LightChain node is rewarded equally likely for participating in the protocol.
description: arXiv admin note: substantial text overlap with arXiv:1904.00375
Quark mass effects in high energy neutrino nucleon scattering
Creators: name: Jeong, Yu Seon
name: Reno, M. H.
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We evaluate the neutrino nucleon charged current cross section at next-to-leading order in quantum chromodynamic corrections in the variable flavor number scheme and the fixed flavor number scheme, taking into account quark masses. The number scheme dependence is largest at the highest energies considered here, $10^{12}$ GeV, where the cross sections differ by approximately 15 percent. We illustrate the numerical implications of the inconsistent application of the fixed flavor number scheme.
description: 8 pages, 8 figures, v2: updated pdfs, version accepted for publication
title: Ð¡Ð¿ÐµÑÐ¸Ð°Ð»ÑÐ½ÑÐµ Ð²Ð¾Ð¿ÑÐ¾ÑÑ Ð½ÐµÐ»Ð¸Ð½ÐµÐ¹Ð½Ð¾Ð¹ Ð¾Ð¿ÑÐ¸ÐºÐ¸
title: ÑÑÐµÐ±Ð½Ð¾Ðµ Ð¿Ð¾ÑÐ¾Ð±Ð¸Ðµ
titleType: Subtitle
Creators: name: ÐÐ¾Ð»Ð¾ÑÐ¾Ð², ÐÐ»Ð°Ð´Ð¸Ð¼Ð¸Ñ
Publisher: name: ÐÐÐ
Year: 1986
Subjects: ÐÐ¿ÑÐ¸ÐºÐ° Ð½ÐµÐ»Ð¸Ð½ÐµÐ¹Ð½Ð°Ñ

description: ÐÐ·Ð»Ð°Ð³Ð°ÑÑÑÑ Ð¾ÑÐ½Ð¾Ð²Ð½ÑÐµ ÑÐ¸Ð·Ð¸ÑÐµÑÐºÐ¸Ðµ Ð¿ÑÐ¾ÑÐµÑÑÑ, Ð¿ÑÐ¾Ð¸ÑÑÐ¾Ð´ÑÑÐ¸Ðµ Ð¿ÑÐ¸ Ð¿ÑÐµÐ¾Ð±ÑÐ°Ð·Ð¾Ð²Ð°Ð½Ð¸Ð¸ ÑÐ°ÑÑÐ¾ÑÑ ÑÐµÐ°Ð»ÑÐ½ÑÑ (ÑÐ°ÑÑÐ¾Ð´ÑÑÐ¸ÑÑÑ, Ð½ÐµÐ¼Ð¾Ð½Ð¾ÑÑÐ¾Ð¼Ð°ÑÐ¸ÑÐµÑÐºÐ¸Ñ) Ð»Ð°Ð·ÐµÑÐ½ÑÑ Ð¿ÑÑÐºÐ¾Ð² Ð² Ð½ÐµÐ»Ð¸Ð½ÐµÐ¹Ð½ÑÑ ÑÑÐµÐ´Ð°Ñ Ñ ÐºÐ²Ð°Ð´ÑÐ°ÑÐ¸ÑÐ½Ð¾Ð¹ Ð½ÐµÐ»Ð¸Ð½ÐµÐ¹Ð½Ð¾ÑÑÑÑ. ÐÑÐ¸Ð²Ð¾Ð´ÑÑÑÑ Ð½ÐµÐ»Ð¸Ð½ÐµÐ¹Ð½Ð¾Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ¸Ðµ ÑÐ°ÑÐ°ÐºÑÐµÑÐ¸ÑÑÐ¸ÐºÐ¸ ÐºÑÐ¸ÑÑÐ°Ð»Ð»Ð¾Ð², Ð° ÑÐ°ÐºÐ¶Ðµ Ð¼ÐµÑÐ¾Ð´Ñ ÑÐ°ÑÑÐµÑÐ° Ð½ÐµÐ»Ð¸Ð½ÐµÐ¹Ð½ÑÑ ÑÐ¼Ð½Ð¾Ð¶Ð¸ÑÐµÐ»ÐµÐ¹ ÑÐ°ÑÑÐ¾ÑÑ. ÐÑÐ¾Ð±ÑÐ¹ Ð°ÐºÑÐµÐ½Ñ ÑÐ´ÐµÐ»Ð°Ð½ Ð½Ð° Ð¸Ð·Ð»Ð¾Ð¶ÐµÐ½Ð¸Ð¸ Ð¼ÐµÑÐ¾Ð´Ð¾Ð² Ð¿Ð¾Ð²ÑÑÐµÐ½Ð¸Ñ ÑÑÑÐµÐºÑÐ¸Ð²Ð½Ð¾ÑÑÐ¸ Ð¿ÑÐ¾ÑÐµÑÑÐ¾Ð² ÑÐ¼Ð½Ð¾Ð¶ÐµÐ½Ð¸Ñ Ð¸ ÑÐ¼ÐµÑÐµÐ½Ð¸Ñ ÑÐ°ÑÑÐ¾Ñ Ð»Ð°Ð·ÐµÑÐ½Ð¾Ð³Ð¾ Ð¸Ð·Ð»ÑÑÐµÐ½Ð¸Ñ. ÐÐ¾ÑÐ¾Ð±Ð¸Ðµ Ð¿ÑÐµÐ´Ð½Ð°Ð·Ð½Ð°ÑÐµÐ½Ð¾ Ð´Ð»Ñ ÑÑÑÐ´ÐµÐ½ÑÐ¾Ð² ÑÐ¿ÐµÑÐ¸Ð°Ð»ÑÐ½Ð¾ÑÑÐ¸ Â«Ð Ð°Ð´Ð¸Ð¾ÑÐ¸Ð·Ð¸ÐºÐ° Ð¸ ÑÐ»ÐµÐºÑÑÐ¾Ð½Ð¸ÐºÐ°Â», ÑÐ¿ÐµÑÐ¸Ð°Ð»Ð¸Ð·Ð¸ÑÑÑÑÐ¸ÑÑÑ Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ ÐºÐ²Ð°Ð½ÑÐ¾Ð²Ð¾Ð¹ ÑÐ»ÐµÐºÑÑÐ¾Ð½Ð¸ÐºÐ¸.
'Schwinger Model' on the Fuzzy Sphere
Creators: name: Harikumar, E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this paper, we construct a model of spinor fields interacting with specific gauge fields on fuzzy sphere and analyze the chiral symmetry of this 'Schwinger model'. In constructing the theory of gauge fields interacting with spinors on fuzzy sphere, we take the approach that the Dirac operator $D_q$ on q-deformed fuzzy sphere $S_{qF}^2$ is the gauged Dirac operator on fuzzy sphere. This introduces interaction between spinors and specific one parameter family of gauge fields. We also show how to express the field strength for this gauge field in terms of the Dirac operators $D_q$ and $D$ alone. Using the path integral method, we have calculated the $2n-$point functions of this model and show that, in general, they do not vanish, reflecting the chiral non-invariance of the partition function.
description: Minor changes, typos corrected, 18 pages, to appear in Mod. Phys. Lett. A
title: Pony ride under pressure: A case of atypical compartment syndrome
Creators: name: Cavillon, Théau
Publisher: name: EURORAD
Year: 2025
Subjects: subject: Musculoskeletal system
subject: Anatomy
subject: Musculoskeletal soft tissue
subject: MR
subject: Clinical Case

description: Clinical History: A 36-year-old woman presented with permanent pain of increasing intensity in her right leg that had been evolving for 24 hours. The pain appeared immediately following a horse ride in an improperly adjusted stirrup and was not relieved by paracetamol, ketoprofen and morphine. No significant medical history.

description: 36 years, female
BORM: Bayesian Object Relation Model for Indoor Scene Recognition
Creators: name: Zhou, Liguang
name: Cen, Jun
name: Wang, Xingchao
name: Sun, Zhenglong
name: Lam, Tin Lun
name: Xu, Yangsheng
Publisher: name: arXiv
Year: 2021
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Robotics (cs.RO)
subject: FOS: Computer and information sciences

description: Scene recognition is a fundamental task in robotic perception. For human beings, scene recognition is reasonable because they have abundant object knowledge of the real world. The idea of transferring prior object knowledge from humans to scene recognition is significant but still less exploited. In this paper, we propose to utilize meaningful object representations for indoor scene representation. First, we utilize an improved object model (IOM) as a baseline that enriches the object knowledge by introducing a scene parsing algorithm pretrained on the ADE20K dataset with rich object categories related to the indoor scene. To analyze the object co-occurrences and pairwise object relations, we formulate the IOM from a Bayesian perspective as the Bayesian object relation model (BORM). Meanwhile, we incorporate the proposed BORM with the PlacesCNN model as the combined Bayesian object relation model (CBORM) for scene recognition and significantly outperforms the state-of-the-art methods on the reduced Places365 dataset, and SUN RGB-D dataset without retraining, showing the excellent generalization ability of the proposed method. Code can be found at https://github.com/hszhoushen/borm.
description: 8 pages, 5 figures, conference, Accepted by IROS2021
Eulerian Rotations of Deformed Nuclei for TDDFT Calculations
Creators: name: Pigg, D. A.
name: Umar, A. S.
name: Oberacker, V. E.
Publisher: name: arXiv
Year: 2009
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We discuss three practical methods for performing Eulerian rotations of Slater determinants in a three-dimensional Cartesian geometry. In addition to the straightforward application of the active form of the quantum mechanical rotation operator, we introduce two methods using a passive position-space rotation followed by an active spin-space rotation, one after variation and the other before variation. These methods can be used to initialize reactions involving deformed nuclei where a particular alignment of the deformed nuclei with respect to the collision axis is desired. We show that doing the rotation before the variation is the most efficient way of generating such initial states.
description: 5 Pages, 4 tables, to be published in Computer Physics Communications
title: Hiperplasia benigna de próstata: aspectos generales y tratamiento, con especial atención al manejo intervencionista (Embolización arterial de próstata).
Creators: name: Capilla Ampudia, Jesús María
Publisher: name: Sociedad Española de Radiología Médica
Year: 2014
Subjects: subject: Genital / Reproductive system male
subject: Interventional vascular
subject: Pelvis
subject: Catheter arteriography
subject: Percutaneous
subject: CT
subject: Embolisation
subject: Hyperplasia / Hypertrophy

description: Objetivo docente
Revisión del tema
Conclusiones
Bibliografía
description: Objetivo docente:
Comprender los aspectos básicos de la HBP como su relevancia clínica,
fisiopatología y tratamiento.
con especial enfásis en la embolización arterial de próstata. Presentamos nuestros resultados (1...
TIC~257060897b: an inflated, low-density, hot-Jupiter transiting a rapidly evolving subgiant star
Creators: name: Montalto, M.
name: Malavolta, L.
name: Gregorio, J.
name: Mantovan, G.
name: Desidera, S.
name: Piotto, G.
name: Nascimbeni, V.
name: Granata, V.
name: Manthopoulou, E. E.
name: Claudi, R.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We report the discovery of a new transiting exoplanet orbiting the star TIC~257060897 and detected using {\it TESS} full frame images. We acquired HARPS-N time-series spectroscopic data, and ground-based photometric follow-up observations from which we confirm the planetary nature of the transiting body. For the host star we determined: T$\rm_{eff}$=(6128$\pm$57) K, log~g=(4.2$\pm$0.1) and [Fe/H]=(+0.20$\pm$0.04). The host is an intermediate age ($\sim$3.5~Gyr), metal-rich, subgiant star with M$_{\star}$=(1.32$\pm$0.04) M$_{\odot}$ and R$_{\star}$=(1.82$\pm$0.05) R$_{\odot}$. The transiting body is a giant planet with a mass m$\rm_p=$(0.67$\pm$0.03) M$\rm_{j}$, a radius r$\rm_p=$(1.49$\pm$0.04) R$\rm_{j}$ yielding a density $ρ_p$=(0.25$\pm$0.02) g cm$^{-3}$ and revolving around its star every $\sim$3.66 days. TIC~257060897b is an extreme system having one of the smallest densities known so far. We argued that the inflation of the planet's radius may be related to the fast increase of luminosity of its host star as it evolves outside the main sequence and that systems like TIC~257060897b could be precursors of inflated radius short period planets found around low luminosity red giant branch stars, as recently debated in the literature.
description: Accepted for publication in MNRAS
Rotational structure of weakly bound molecular ions
Creators: name: Lemeshko, Mikhail
name: Friedrich, Bretislav
Publisher: name: arXiv
Year: 2009
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: Atomic and Molecular Clusters (physics.atm-clus)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Relying on the quantization rule of Raab and Friedrich [Phys. Rev. A (2009) in press], we derive simple and accurate formulae for the number of rotational states supported by a weakly bound vibrational level of a diatomic molecular ion. We also provide analytic estimates of the rotational constants of any such levels up to threshold for dissociation and obtain a criterion for determining whether a given weakly bound vibrational level is rotationless. The results depend solely on the long-range part of the molecular potential.
description: 4 pages, 1 figure
Local and $2$-local derivations of simple $n$-ary algebras
Creators: name: Ferreira, Bruno Leonardo Macedo
name: Kaygorodov, Ivan
name: Kudaybergenov, Karimbergen
Publisher: name: arXiv
Year: 2021
Subjects: subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics

description: In the present paper, we prove that every local and $2$-local derivation of the complex finite-dimensional simple Filippov algebra is a derivation. As a corollary we have the description of all local and $2$-local derivations of complex finite-dimensional semisimple Filippov algebras. All local derivations of the ternary Malcev algebra $M_8$ are described. It is the first example of a finite-dimensional simple algebra that admits pure local derivations, i.e. algebra admits a local derivation which is not a derivation.
title: Anpassung und Anwendung einer Bewertungsmethode zur Beurteilung der Ökosystemleistungen siedlungsdominierter Gewässerläufe
Creators: name: Sauerwein, Marie
name: Hack, Jochen
name: Lehmann, Boris
Publisher: name: Bundesanstalt für Gewässerkunde
Year: 2021

description: Urbane Gewässer unterliegen enormem Nutzungsdruck und müssen neben ihrer ökologischen Funktion vor allem wirtschaftlichen und sozialen Anforderungen gerecht werden. Obwohl die Europäische Wasserrahmenrichtlinie die Verbesserung der Gewässer fordert und das Erreichen eines guten ökologischen und chemischen Zustandes als Ziel definiert, werden urbane Gewässer oft aufgrund fehlender Berichtspflicht (Einzugsgebiet < 10 km²) oder der Einstufung als erheblich veränderte Wasserkörper sowie der vergleichsweise aufwendigen Verbesserung des ökologischen Potenzials bei der bei der Maßnahmenplanung und -umsetzung nicht vorranging betrachtet. Grund dafür sind unter anderem auch Zielkonflikte zwischen Stadtplanung und ökologischen Anforderungen. In diesem Spannungsfeld kann der Ansatz der Ökosystemleistungen als Entscheidungs- und Bewertungshilfe genutzt werden. Der vorliegende Beitrag untersucht im Speziellen die Ökosystemleistungen urbaner Fließgewässer und stellt diese mithilfe des in Deutschland entwickelten River Ecosystem Service Index, RESI, dar. Als Beispielgewässer wird der Darmbach, ein kleiner, siedlungsdominierter Bach mit rund 8 km Fließweg innerhalb der Stadtgrenzen Darmstadts, genutzt. Gleichzeitig wird somit die Anwendbarkeit des RESI für urbane Gewässer erprobt und dessen Übertragbarkeit diskutiert. Im Rahmen der Untersuchung werden Berechnungen zu insgesamt sieben Ökosystemleistungen nach den Vorgaben des RESI-Anwendungshandbuches durchgeführt. Es wird gezeigt, dass die berechneten Indikatoren teilweise ohne Änderungen auf urbane Gewässer übertragbar sind. Obwohl der RESI für große Gewässer, beispielsweise Elbe und Donau, entwickelt wurde ist die Anwendung auf kleine, siedlungsdominierte Fließgewässer mit kleineren Einschränkungen möglich und eine Bewertung der Ökosystemleistungen des als Fallbeispiel gewählten Darmbach möglich. Probleme bei der Anwendung auf kleinere Gewässer resultieren hauptsachlich aus teils unzureichendem Messdatenbestand und häufig ungenügender Übertragbarkeit des räumlichen Bezugs. Um alle Belange siedlungsdominierter Gewässer abbilden zu können, empfiehlt sich eine Erweiterung der betrachteten Indikatoren, welche die speziellen Gegebenheiten in Siedlungsbereichen berücksichtigen. Dazu gehören, neben der Berücksichtigung individueller Stadtbiotope als Beitrag zur Biodiversität, auch die Aufwertung des Stadtbildes durch Stadtnatur und die spezifische stadtökologische Qualität zur Naherholung. Die Berücksichtigung von Ökosystemleistungen innerhalb der Stadtplanung und der Gewässerentwicklungsplanung in urbanen Gebieten ermöglicht eine integrative Bewertung von Planungsvorhaben und stellt aus aktueller klimapolitischer Sicht eine wichtige Ergänzung zu bisherigen Bewertungen dar. Darüber hinaus ist der indikatorbasierte Ansatz zur Bewertung von Ökosystemleistungen eine Möglichkeit, diese objektiv und reproduzierbar darzustellen.
Probing Extremal Gravitational-Wave Events with Coarse-Grained Likelihoods
Creators: name: Essick, Reed
name: Farah, Amanda
name: Galaudage, Shanika
name: Talbot, Colm
name: Fishbach, Maya
name: Thrane, Eric
name: Holz, Daniel E.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: As catalogs of gravitational-wave transients grow, new records are set for the most extreme systems observed to date. The most massive observed black holes probe the physics of pair instability supernovae while providing clues about the environments in which binary black hole systems are assembled. The least massive black holes, meanwhile, allow us to investigate the purported neutron star-black hole mass gap, and binaries with unusually asymmetric mass ratios or large spins inform our understanding of binary and stellar evolution. Existing outlier tests generally implement leave-one-out analyses, but these do not account for the fact that the event being left out was by definition an extreme member of the population. This results in a bias in the evaluation of outliers. We correct for this bias by introducing a coarse-graining framework to investigate whether these extremal events are true outliers or whether they are consistent with the rest of the observed population. Our method enables us to study extremal events while testing for population model misspecification. We show that this ameliorates biases present in the leave-one-out analyses commonly used within the gravitational-wave community. Applying our method to results from the second LIGO--Virgo transient catalog, we find qualitative agreement with the conclusions of Abbott et al, ApJL 913 L7 (2021). GW190814 is an outlier because of its small secondary mass. We find that neither GW190412 nor GW190521 are outliers.
description: 19 pages, 8 figures
Classification of isometries of spaces of constant curvature and invariant subspaces
Creators: name: Cirici, Joana
Publisher: name: arXiv
Year: 2009
Subjects: subject: Differential Geometry (math.DG)
subject: Algebraic Geometry (math.AG)
subject: FOS: Mathematics
subject: 15A21 15A21, 51M10, 51F25

description: We study the varieties of invariant totally geodesic submanifolds of isometries of the spherical, Euclidean and hyperbolic spaces in each finite dimension. We show that the dimensions of the connected components of these varieties determine the orbit type (or the z-class) of the isometry. For this purpose, we introduce the Segre symbol of an isometry, a discrete invariant encoding the structure of its normal form, which parametrizes z-classes. We then provide a description of the isomorphism type of the varieties of invariant subspaces in terms of the Segre symbol.
description: major revision; final version to appear in Linear Algebra Appl
Young people between education and the labour market during the COVID-19 pandemic in Italy
Creators: name: Fiaschi, Davide
name: Tealdi, Cristina
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: We analyse the distribution and the flows between different types of employment (self-employment, temporary, and permanent), unemployment, education, and other types of inactivity, with particular focus on the duration of the school-to-work transition (STWT). The aim is to assess the impact of the COVID-19 pandemic in Italy on the careers of individuals aged 15-34. We find that the pandemic worsened an already concerning situation of higher unemployment and inactivity rates and significantly longer STWT duration compared to other EU countries, particularly for females and residents in the South of Italy. In the midst of the pandemic, individuals aged 20-29 were less in (permanent and temporary) employment and more in the NLFET (Neither in the Labour Force nor in Education or Training) state, particularly females and non Italian citizens. We also provide evidence of an increased propensity to return to schooling, but most importantly of a substantial prolongation of the STWT duration towards permanent employment, mostly for males and non Italian citizens. Our contribution lies in providing a rigorous estimation and analysis of the impact of COVID-19 on the carriers of young individuals in Italy, which has not yet been explored in the literature.
description: 16 pages, 4 figures, 3 tables
Exploring the accretion-ejection geometry of GRS 1915+105 in the obscured state with future X-ray spectro-polarimetry
Creators: name: Ratheesh, Ajay
name: Matt, Giorgio
name: Tombesi, Francesco
name: Soffitta, Paolo
name: Pesce-Rollins, Melissa
name: Di Marco, Alessandro
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: GRS 1915+105 has been in a bright flux state for more than 2 decades, but in 2018 a significant drop in flux was observed, partly due to changes in the central engine along with increased X-ray absorption. The aim of this work is to explore how X-ray spectro-polarimetry can be used to derive the basic geometrical properties of the absorbing and reflecting matter. In particular, the expected polarisation of the radiation reflected off the disc and the putative outflow is calculated. We use \textit{NuSTAR} data collected after the flux drop to derive the parameters of the system from hard X-ray spectroscopy. The spectroscopic parameters are then used to derive the expected polarimetric signal, using results from a MonteCarlo radiative transfer code both in the case of neutral and fully ionised matter. From the spectral analysis, we find that the continuum emission becomes softer with increasing flux, and that in all flux levels the obscuring matter is highly ionised. This analysis, on the other hand, confirms that spectroscopy alone is unable to put constraints on the geometry of the reflectors. Simulations show that X-ray polarimetric observations, like those that will be provided soon by the Imaging X-ray Polarimetry Explorer (IXPE), will help to determine the geometrical parameters which are left unconstrained by the spectroscopic analysis.
description: 14 pages, 13 figures, Accepted for publication in Astronomy & Astrophysics
On continuous choice of retractions onto nonconvex subsets
Creators: name: Repovš, Dušan
name: Semenov, Pavel V.
Publisher: name: arXiv
Year: 2008
Subjects: subject: General Topology (math.GN)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 54C60, 54C65, 41A65, 54C55, 54C20

description: For a Banach space $B$ and for a class $\A$ of its bounded closed retracts, endowed with the Hausdorff metric, we prove that retractions on elements $A \in \A$ can be chosen to depend continuously on $A$, whenever nonconvexity of each $A \in \A$ is less than $\f{1}{2}$. The key geometric argument is that the set of all uniform retractions onto an $\a-$paraconvex set (in the spirit of E. Michael) is $\frac{\a}{1-\a}-$paraconvex subset in the space of continuous mappings of $B$ into itself. For a Hilbert space $H$ the estimate $\frac{\a}{1-\a}$ can be improved to $\frac{\a (1+\a^{2})}{1-\a^{2}}$ and the constant $\f{1}{2}$ can be reduced to the root of the equation $\a+ \a^{2}+a^{3}=1$.
title: Integrating Complex Event Processing and Transactional Dataflow
Creators: name: Stollenwerk, Vincent
Publisher: name: UNSPECIFIED
Year: 2021

description: Modern applications are often driven by user interactions and user triggered events. Traditional event handling logic using imperative code and the observer pattern can quickly become complex and error-prone. Reactive programming frameworks try to solve this by simplifying specification of event handling and dataflow. Although modern reactive frameworks can improve the event handling experience a lot, they still lack expressiveness for more complex events. When handling such event, a fallback to imperative code and observers is often needed. In this thesis we extend the ReScala framework with so-called reactors to provide a simple tool for complex event processing in a reactive context. Reactors embed imperative code into a reactive object, which changes state depending of series and combinations of events.
$(H,ρ)$--induced political dynamics: facets of the disloyal attitudes into the public opinion
Creators: name: Di Salvo, Rosa
name: Gorgone, Matteo
name: Oliveri, Francesco
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: FOS: Physical sciences

description: A simple model, suitable to describe the dynamics of a political system consisting of three macro--groups affected by turncoat--like behaviors and the influence of the opportunistic attitudes of politicians on voters' opinion, is presented. The model is based on raising and lowering fermionic operators whose dynamics is ruled by a suitable quadratic Hamiltonian operator with the addition of specific rules (depending on the variations of the mean values of the observables) able to adjust periodically the model to the political environment, \emph{i.e.}, we move in the framework of the so called $(H,ρ)$--induced dynamics approach.
description: 19 pages, 10 figures
Mean-field diffusive dynamics on weighted networks
Creators: name: Baronchelli, Andrea
name: Pastor-Satorras, Romualdo
Publisher: name: arXiv
Year: 2009
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Physics and Society (physics.soc-ph)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: Diffusion is a key element of a large set of phenomena occurring on natural and social systems modeled in terms of complex weighted networks. Here, we introduce a general formalism that allows to easily write down mean-field equations for any diffusive dynamics on weighted networks. We also propose the concept of annealed weighted networks, in which such equations become exact. We show the validity of our approach addressing the problem of the random walk process, pointing out a strong departure of the behavior observed in quenched real scale-free networks from the mean-field predictions. Additionally, we show how to employ our formalism for more complex dynamics. Our work sheds light on mean-field theory on weighted networks and on its range of validity, and warns about the reliability of mean-field results for complex dynamics.
description: 8 pages, 3 figures
Inclination estimates from off-axis GRB afterglow modelling
Creators: name: Lamb, Gavin P
name: Fernández, Joseph J
name: Hayes, Fergus
name: Kong, Albert K H
name: Lin, En-Tzu
name: Tanvir, Nial R
name: Hendry, Martin
name: Heng, Ik Siong
name: Saha, Surojit
name: Veitch, John
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: For gravitational wave (GW) detected neutron star mergers, one of the leading candidates for electromagnetic (EM) counterparts is the afterglow from an ultra-relativistic jet. Where this afterglow is observed, it will likely be viewed off-axis, such as the afterglow following GW170817/GRB 170817A. The temporal behaviour of an off-axis observed GRB afterglow can be used to reveal the lateral jet structure, and statistical model fits can put constraints on the various model free-parameters. Amongst these parameters is the inclination of the system to the line of sight. Along with the GW detection, the afterglow modelling provides the best constraint on the inclination to the line-of-sight and can improve the estimates of cosmological parameters e.g. the Hubble constant, from GW-EM events. However, modelling of the afterglow depends on the assumed jet structure and, often overlooked, the effects of lateral spreading. Here we show how the inclusion of lateral spreading in the afterglow models can affect the estimated inclination of GW-EM events.
description: 14 pages, 5 figures, Accepted to the special issue of Universe, "Waiting for GODOT -- Present and Future of Multi-Messenger Astronomy"
Real-time gravitational-wave science with neural posterior estimation
Creators: name: Dax, Maximilian
name: Green, Stephen R.
name: Gair, Jonathan
name: Macke, Jakob H.
name: Buonanno, Alessandra
name: Schölkopf, Bernhard
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We demonstrate unprecedented accuracy for rapid gravitational-wave parameter estimation with deep learning. Using neural networks as surrogates for Bayesian posterior distributions, we analyze eight gravitational-wave events from the first LIGO-Virgo Gravitational-Wave Transient Catalog and find very close quantitative agreement with standard inference codes, but with inference times reduced from O(day) to a minute per event. Our networks are trained using simulated data, including an estimate of the detector-noise characteristics near the event. This encodes the signal and noise models within millions of neural-network parameters, and enables inference for any observed data consistent with the training distribution, accounting for noise nonstationarity from event to event. Our algorithm -- called "DINGO" -- sets a new standard in fast-and-accurate inference of physical parameters of detected gravitational-wave events, which should enable real-time data analysis without sacrificing accuracy.
description: 7+12 pages, 4+11 figures. [v2]: Minor updates to match published version, code available at https://github.com/dingo-gw/dingo
title: Highly oriented layers of the three‐dimensional semiconductor CdTe on the two‐dimensional layered semiconductors MoTe₂and WSe₂
Creators: name: Löher, T.
name: Tomm, Y.
name: Klein, Andreas
name: Su, D.
name: Pettenkofer, C.
name: Jaegermann, Wolfram
Publisher: name: AIP Publishing
Year: 2021

description: The II–VI semiconductor CdTe was sequentially deposited onto the (0001) van der Waals surfaces of the layered compound semiconductors MoTe₂ and WSe₂ by molecular beam epitaxy. Growth could only be achieved after deposition of a nucleation layer of CdTe at room temperature. After nucleation subsequent deposition steps followed at increased substrate temperatures (T=170–370 °C) in order to increase the crystalline quality of the films. The deposited films were investigated after each growth step by low energy electron diffraction and photoelectron spectroscopy. The diffraction pattern indicates a facetting of the (111) oriented film surfaces. From photoemission data we exclude interface reactions between substrate and film material. Transmission electron microscopy was used to examine the film morphology after the UHV experiments. The mean diameter of the film crystallites is 200–400 Å.
Biological applications of ferroelectric materials
Creators: name: Blázquez-Castro, Alfonso
name: García-Cabañes, Angel
name: Carrascosa, Mercedes
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantitative Methods (q-bio.QM)
subject: Cell Behavior (q-bio.CB)
subject: FOS: Biological sciences

description: The study and applications of ferroelectric materials in the biomedical and biotechnological fields is a novel and very promising scientific area that spans roughly one decade. However, some groups have already provided experimental proof of very interesting biological modulation when living systems are exposed to different ferroelectrics and excitation mechanisms. These materials should offer several advantages in the field of bioelectricity, such as no need of an external electric power source or circuits, scalable size of the electroactive regions, flexible and reconfigurable virtual electrodes, or fully proved biocompatibility. In this focused review we provide the underlying physics of ferroelectric activity and a recount of the research reports already published, along with some tentative biophysical mechanisms that can explain the observed results. More specifically, we focused on the biological actions of domain ferroelectrics, and ferroelectrics excited by the bulk photovoltaic effect or the pyroelectric effect. It is our goal to provide a comprehensive account of the published material so far, and to set the stage for a vigorous expansion of the field, with envisioned applications that span from cell biology and signaling to cell and tissue regeneration, antitumoral action, or cell bioengineering to name a few.
description: 39 pages, 10 figures, 3 tables, 127 references, publication year 2018
Chemical Production and Microelectronic Applications of Graphene and Nano-Graphene Derivatives
Creators: name: Treossi, Emanuele <1974>
Publisher: name: Alma Mater Studiorum - Università di Bologna
Year: 2012
Subjects: CHIM/01 Chimica analitica

description: Graphene and graphenic derivatives have rapidly emerged as an extremely promising system for electronic, optical, thermal, and electromechanical applications. Several approaches have been developed to produce these materials (i.e. scotch tape, CVD, chemical and solvent exfoliation). In this work we report a chemical approach to produce graphene by reducing graphene oxide (GO) via thermal or electrical methods. A morphological and electrical characterization of these systems has been performed using different techniques such as SPM, SEM, TEM, Raman and XPS. 

Moreover, we studied the interaction between graphene derivates and organic molecules focusing  on the following aspects:

- improvement of optical contrast of graphene on different substrates for rapid monolayer identification1 
- supramolecular interaction with organic molecules (i.e. thiophene, pyrene etc.)4
- covalent functionalization with optically active molecules2
- preparation and characterization of organic/graphene Field Effect Transistors3-5

Graphene chemistry can potentially allow seamless integration of graphene technology in organic electronics devices to improve device performance and develop new applications for graphene-based materials.

[1] E. Treossi, M. Melucci, A. Liscio, M. Gazzano, P. Samorì, and V. Palermo, J. Am. Chem. Soc., 2009, 131, 15576. [2] M. Melucci, E. Treossi, L. Ortolani, G. Giambastiani, V. Morandi, P. Klar, C. Casiraghi, P. Samorì, and V. Palermo, J. Mater. Chem., 2010, 20, 9052.  [3] J.M. Mativetsky, E. Treossi, E. Orgiu, M. Melucci, G.P. Veronese, P. Samorì, and V. Palermo, J. Am. Chem. Soc., 2010, 132, 14130.  [4] A. Liscio, G.P. Veronese, E. Treossi, F. Suriano, F. Rossella, V. Bellani, R. Rizzoli, P. Samorì and V. Palermo, J. Mater. Chem., 2011, 21, 2924. 
[5] J.M. Mativetsky, A. Liscio, E. Treossi, E. Orgiu, A. Zanelli, P. Samorì , V. Palermo, J. Am. Chem. Soc., 2011, 133, 14320
Alfnoor: assessing the information content of Ariel's low resolution spectra with planetary population studies
Creators: name: Mugnai, Lorenzo V.
name: Al-Refaie, Ahmed
name: Bocchieri, Andrea
name: Changeat, Quentin
name: Pascale, Enzo
name: Tinetti, Giovanna
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: The ARIEL Space Telescope will provide a large and diverse sample of exoplanet spectra, performing spectroscopic observations of about 1000 exoplanets in the wavelength range $0.5 \to 7.8 \; μm$. In this paper, we investigate the information content of ARIEL's Reconnaissance Survey low resolution transmission spectra. Among the goals of the ARIEL Reconnaissance Survey is also to identify planets without molecular features in their atmosphere. In this work, (1) we present a strategy that will allow to select candidate planets to be reobserved in a ARIEL's higher resolution Tier; (2) we propose a metric to preliminary classify exoplanets by their atmospheric composition without performing an atmospheric retrieval; (3) we introduce the possibility to find other methods to better exploit the data scientific content.
description: 31 pages, 14 figures, submitted to ApJ
Additional file 10 of Establishment of a novel cell cycle-related prognostic signature predicting prognosis in patients with endometrial cancer
Creators: name: Liu, Jinhui
name: Mei, Jie
name: Li, Siyue
name: Wu, Zhipeng
name: Zhang, Yan
Publisher: name: figshare
Year: 2020
Subjects: subject: Biophysics
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Biological Sciences not elsewhere classified
subject: Cancer
subject: Computational Biology

description: Additional file 10: Figure S9. Kaplan-Meier curves of the EZH2, HMGB3, NOTCH2 and ODF2. The yellow line indicates samples with highly expressed genes (above best-separation value), and the green line designates the samples with lowly expressed genes (below best-separation value)