cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Comprehensive Bayesian Modeling of Tidal Circularization in Open Cluster Binaries part I: M 35, NGC 6819, NGC 188
Creators: name: Penev, Kaloyan M.
name: Schussler, Joshua A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Tidal friction has long been recognized to circularize the orbits of binary stars over time. In this study, we use the observed distribution of orbital eccentricities in populations of binary stars to probe tidal dissipation. In contrast to previous studies, we incorporate a host of physical effects often neglected in other analyses, provide a much more general description of tides, model individual systems in detail (in lieu of population statistics), and account for all observational uncertainties. The goal is to provide a reliable measurement of the properties of tidal dissipation that is fully supported by the data, properly accounts for different dissipation affecting each tidal wave on each object separately, and evolves with the internal structure of the stars. We extract high precision measurements of tidal dissipation in short period binaries of Sun-like stars in three open clusters. We find that the tidal quality factor on the main sequence falls in the range $5.7 < \log_{10}Q_\star' < 6$ for tidal periods between 3 and 7.5 days. In contrast, the observed circularization in the 150 Myr old M 35 cluster requires that pre-main sequence stars are much more dissipative: $Q_\star' < 4\times10^4$. We test for frequency dependence of the tidal dissipation, finding that for tidal periods between 3 and 7.5 days, if a dependence exists, it is sub-linear for main-sequence stars. Furthermore, by using a more complete physical model for the evolution, and by accounting for the particular properties of each system, we alleviate previously observed tensions in the circularization in the open clusters analyzed.
description: Accepted for publication in Monthly Notices of the Royal Astronomical Society 28 pages, 18 figures in main text + 7f figures in appendices
Unreasonable Effectiveness of Learning Neural Networks: From Accessible States and Robust Ensembles to Basic Algorithmic Schemes
Creators: name: Baldassi, Carlo
name: Borgs, Christian
name: Chayes, Jennifer
name: Ingrosso, Alessandro
name: Lucibello, Carlo
name: Saglietti, Luca
name: Zecchina, Riccardo
Publisher: name: arXiv
Year: 2016
Subjects: subject: Machine Learning (stat.ML)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: In artificial neural networks, learning from data is a computationally demanding task in which a large number of connection weights are iteratively tuned through stochastic-gradient-based heuristic processes over a cost-function. It is not well understood how learning occurs in these systems, in particular how they avoid getting trapped in configurations with poor computational performance. Here we study the difficult case of networks with discrete weights, where the optimization landscape is very rough even for simple architectures, and provide theoretical and numerical evidence of the existence of rare - but extremely dense and accessible - regions of configurations in the network weight space. We define a novel measure, which we call the "robust ensemble" (RE), which suppresses trapping by isolated configurations and amplifies the role of these dense regions. We analytically compute the RE in some exactly solvable models, and also provide a general algorithmic scheme which is straightforward to implement: define a cost-function given by a sum of a finite number of replicas of the original cost-function, with a constraint centering the replicas around a driving assignment. To illustrate this, we derive several powerful new algorithms, ranging from Markov Chains to message passing to gradient descent processes, where the algorithms target the robust dense states, resulting in substantial improvements in performance. The weak dependence on the number of precision bits of the weights leads us to conjecture that very similar reasoning applies to more conventional neural networks. Analogous algorithmic schemes can also be applied to other optimization problems.
description: 31 pages (14 main text, 18 appendix), 12 figures (6 main text, 6 appendix)
MPEC 2024-R70 : 2024 RZ1
Creators: name: Minor Planet Center Staff
Publisher: name: The Minor Planet Center
Year: 2024
Subjects: subject: Small Solar System bodies
valueUri: http://astrothesaurus.org/uat/1469
subject: 2024 RZ1

description: The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements.  They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
title: Nachhaltigkeit als Qualitätskriterium von Software - Den Blick auf ressourcen-sparsame Softwareentwicklung schärfen
Creators: name: Radfelder, Oliver
name: Vosseberg, Karin
Publisher: name: Gesellschaft für Informatik, Bonn
Year: 2023
Subjects: subject: Softwareentwicklung
subject: Softwarekonfiguration
subject: analytische Qualitätssicherung
subject: konstruktive Qualitätssicherung
subject: Messen von Software
subject: nichtfunktionale Qualitätskriterien
subject: Ressourcenverbrauch
subject: Nachhaltigkeit

description: In der Software Engineering Ausbildung an Hochschulen liegt meist der Schwerpunkt auf Methoden und Verfahren der Konstruktion komplexerer Softwaresysteme. Mit dem vorliegenden Beitrag wird diskutiert, wie Studierende durch analytische Maßnahmen der Qualitätssicherung für eine ressourcen-sparsame Softwareentwicklung sensibilisiert werden können. Den Studierenden werden einfache Werkzeuge an die Hand gegeben, um insbesondere die nicht-funktionalen Eigenschaften eines Softwaresystems zu untersuchen. Bei nicht-funktionalen Eigenschaften spielen neben den neu oder weiterentwickelten Softwarekomponenten auch die Laufzeitumgebung eine wesentliche Rolle, so dass auch diese in die Betrachtung der Qualitätssicherung integriert werden muss und damit auch immer Teil der Entwicklung eines Softwaresystems ist. Anhand eines konkreten Beispiels wird der Einfluss der Laufzeitumgebung auf das Verhalten und dem Ressourcenverbrauch einer Webanwendung mit den Studieren diskutiert, um den Blick auf das Zusammenspiel zwischen Applikation und Laufzeitumgebung zu schärfen. Zudem eignet sich das Beispiel, um Vorteile von DevOps als Vorgehensmodell erlebbar zu machen.
DragPoser: Motion Reconstruction from Variable Sparse Tracking Signals via Latent Space Optimization
Creators: name: Ponton, Jose Luis
name: Pujol, Eduard
name: Aristidou, Andreas
name: Andujar, Carlos
name: Pelechano, Nuria
Publisher: name: arXiv
Year: 2024
Subjects: subject: Graphics (cs.GR)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: High-quality motion reconstruction that follows the user's movements can be achieved by high-end mocap systems with many sensors. However, obtaining such animation quality with fewer input devices is gaining popularity as it brings mocap closer to the general public. The main challenges include the loss of end-effector accuracy in learning-based approaches, or the lack of naturalness and smoothness in IK-based solutions. In addition, such systems are often finely tuned to a specific number of trackers and are highly sensitive to missing data e.g., in scenarios where a sensor is occluded or malfunctions. In response to these challenges, we introduce DragPoser, a novel deep-learning-based motion reconstruction system that accurately represents hard and dynamic on-the-fly constraints, attaining real-time high end-effectors position accuracy. This is achieved through a pose optimization process within a structured latent space. Our system requires only one-time training on a large human motion dataset, and then constraints can be dynamically defined as losses, while the pose is iteratively refined by computing the gradients of these losses within the latent space. To further enhance our approach, we incorporate a Temporal Predictor network, which employs a Transformer architecture to directly encode temporality within the latent space. This network ensures the pose optimization is confined to the manifold of valid poses and also leverages past pose data to predict temporally coherent poses. Results demonstrate that DragPoser surpasses both IK-based and the latest data-driven methods in achieving precise end-effector positioning, while it produces natural poses and temporally coherent motion. In addition, our system showcases robustness against on-the-fly constraint modifications, and exhibits exceptional adaptability to various input configurations and changes.
description: Published on Eurographics 2025. Project page: https://upc-virvig.github.io/DragPoser/
title: Evaluation of stability of signal intensity ratios of normal upper abdominal organs and spinal cord in diffusion weighted (DW) imaging
Creators: name: Ito, Kyoichi
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Diagnostic procedure
subject: MR-Diffusion/Perfusion
subject: MR
subject: Abdomen
subject: Tissue characterisation

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: Diffusion-weighted (DW) imaging has become an established method for neuroimaging , particularly in patients with acute stroke, intracranial tumors, and demyelinating diseases. DW imaging of the abdomen has become feasible, which has led to a...
Efficient evaluation of the error probability for pilot-assisted URLLC with Massive MIMO
Creators: name: Kislal, A. Oguz
name: Lancho, Alejandro
name: Durisi, Giuseppe
name: Ström, Erik
Publisher: name: arXiv
Year: 2022
Subjects: subject: Information Theory (cs.IT)
subject: FOS: Computer and information sciences

description: We propose a numerically efficient method for evaluating the random-coding union bound with parameter $s$ on the error probability achievable in the finite-blocklength regime by a pilot-assisted transmission scheme employing Gaussian codebooks and operating over a memoryless block-fading channel. Our method relies on the saddlepoint approximation, which, differently from previous results reported for similar scenarios, is performed with respect to the number of fading blocks (a.k.a. diversity branches) spanned by each codeword, instead of the number of channel uses per block. This different approach avoids a costly numerical averaging of the error probability over the realizations of the fading process and of its pilot-based estimate at the receiver and results in a significant reduction of the number of channel realizations required to estimate the error probability accurately. Our numerical experiments for both single-antenna communication links and massive multiple-input multiple-output (MIMO) networks show that, when two or more diversity branches are available, the error probability can be estimated accurately with the saddlepoint approximation with respect to the number of fading blocks using a numerical method that requires about two orders of magnitude fewer Monte-Carlo samples than with the saddlepoint approximation with respect to the number of channel uses per block.
Kamera Pengawasan Physical Distancing Berbasis Artificial Intelligence
Creators: name: Miteryandi, Asri
name: Sumaryo, Sony
name: Rodiana, Irham Mulkan
Publisher: name: eProceedings of Engineering
Year: 2022

description: Abstrak—Keadaan darurat yang diakibatkan Coronavirus telah mempengaruhi dunia dalam beberapa hal. Sejak adanya virus menular tersebut, seluruh warga dunia harus menyesuaikan cara hidup karena virus ini dapat menyebar melalui droplet dari hidung atau mulut pada saat batuk atau bersin. Salah satu cara untuk mengurangi penyebaran virus tersebut adalah dengan cara menerapkan physical distancing. Physical distancing merupakan salah satu cara pencegahan penyebaran virus dengan menjaga jarak, maka untuk memastikan bahwa pelaksanaan physical distancing dilakukan dengan benar, perlu dilakukan pengawasan terhadap kegiatan tersebut. Salah satu hal yang bisa dilakukan untuk membantu permasalahan tersebut adalah dengan memanfaatkan teknologi pada bidang artificial intelligence atau deep learning. Dalam penelitian ini, peneliti menerapkan algoritma YOLO (You Only Look Once) untuk melakukan pendeteksian physical distancing. Dari hasil pengujian, sistem yang dibangun dapat mendeteksi object orang pada suatu tempat menggunakan raspberry pi. Output yang didapatkan yaitu sistem dapat memberikan tanda hijau pada bounding box jika object berada pada jarak aman, sebaliknya sistem memberikan tanda merah pada bounding box jika object berada pada jarak berdekatan. Hasil yang didapatkan untuk deteksi objek ialah 100% dalam 200 kali percobaan dengan tingkat akurasi untuk deteksi physical distancing adalah 92% dan 93%. Kata kunci—coronavirus, physical distancing, YOLO, deep learning, artificial intelligence
description: eProceedings of Engineering, Vol 9, No 5 (2022): Oktober 2022
Sonnenfleckenzeichnung Nr. 26830.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 24.01.1984, erstellt von Hans Ulrich Keller
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1984

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g)
title: The usefulness of a new iterative approximation reconstruction algorithm in low-dose CT screening for lung cancer
Creators: name: Matsumoto, Shinnosuke
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Lung
subject: Thorax
subject: Professional issues
subject: CT
subject: Image manipulation / Reconstruction
subject: CAD
subject: Technical aspects
subject: Abscess

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: National Lung Screening Trial (NLST) reported a 20% reduction in lung cancer mortality in patients underwent chest CT compared to those screened with chest x-ray. Although CT is effective tools to detect lung cancer in early stage, the patient doses...
Fidelity Susceptibility as Holographic PV-Criticality
Creators: name: Momeni, Davood
name: Faizal, Mir
name: Myrzakulov, Kairat
name: Myrzakulov, Ratbay
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: It is well known that entropy can be used to holographically establish a connection between geometry, thermodynamics and information theory. In this paper, we will use complexity to holographically establish a connection between geometry, thermodynamics and information theory. Thus, we will analyse the relation between holographic complexity, fidelity susceptibility, and thermodynamics in extended phase space. We will demonstrate that fidelity susceptibility (which is the informational complexity dual to a maximum volume in AdS) can be related to the thermodynamical volume (which is conjugate to the cosmological constant in the extended thermodynamic phase space). Thus, this letter establishes a relation between geometry, thermodynamics, and information theory, using complexity.
description: Version accepted for publication in Physics Letters B, 11 pages, 3 figures
Topological phase transition between non-high symmetry critical phases and curvature function renormalization group
Creators: name: Kumar, Ranjith R
name: Kartik, Y R
name: Sarkar, Sujit
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Other Condensed Matter (cond-mat.other)
subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: The interplay between topology and criticality has been a recent interest of study in condensed matter physics. A unique topological transition between certain critical phases has been observed as a consequence of the edge modes living at criticalities. In this work, we generalize this phenomenon by investigating possible transitions between critical phases which are non-high symmetry (non-HS) in nature. We find the triviality and non-triviality of these critical phases in terms of the decay length of the edge modes and also characterize them using the winding numbers. The distinct non-HS critical phases are separated by multicritical points with linear dispersion at which the winding number exhibits the quantized jump, indicating a change in the topology (number of edge modes) at the critical phases. Moreover, we reframe the scaling theory based on the curvature function, i.e. curvature function renormalization group method to efficiently address the non-HS criticalities and multicriticalities. Using this we identify the conventional topological transition between gapped phases through non-HS critical points, and also the unique topological transition between critical phases through multicritical points. The renormalization group flow, critical exponents, and correlation function of Wannier states enable the characterization of non-HS criticalities along with multicriticalities.
description: 13 pages + supplementary (4 pages), 14 figures. Published version
Sonnenfleckenzeichnung Nr. 26822.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 08.01.1984, erstellt von Hans Ulrich Keller
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1984

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g) und darüber hinaus einer Spalte für A: mit Hilfe eines korrekt-reduzierenden optischen Filters von blossem Auge sichtbare Flecken
McGinn, B./Meyendorff, J./Leclercq, J. (Hg.), Geschichte der christlichen Spiritualität
Creators: name: Föller, Oskar
Publisher: name: Jahrbuch für evangelikale Theologie
Year: 2025

description: 1821139941
description: Jahrbuch für evangelikale Theologie, V. 8 (1994): Jahrbuch für evangelikale Theologie, Band 8
title: Presentation, imaging features, and endovascular treatment of vein of Galen aneurysmal malformations in the neonatal period and early infancy.
Creators: name: McCusker, Mark
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Arteriovenous malformations
subject: Embolisation
subject: Ultrasound
subject: MR
subject: Catheter arteriography
subject: Paediatric
subject: Neuroradiology brain
subject: Interventional vascular

description: Learning objectives Background Imaging findings OR Procedure details Conclusion Personal Information References
description: Learning objectives: To describe the clinical presentation, imaging features, and endovascular management of vein of Galen aneurysmal malformation (VGAM), with reference to five cases treated with transarterial embolisation in our...
Determining Perpendicular Magnetic Anisotropy in Fe/MgO/Fe Magnetic Tunnel Junction: A DFT-Based Spin-Orbit Torque Method
Creators: name: Huang, Bao-Huei
name: Fu, Yu-Hsiang
name: Kaun, Chao-Cheng
name: Tang, Yu-Hui
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: In our JunPy package, we have combined the first-principles calculated self-consistent Hamiltonian with divide-and-conquer technique to successfully determine the magnetic anisotropy (MA) in an Fe/MgO/Fe magnetic tunnel junction (MTJ). We propose a comprehensive analytical derivation to clarify the crucial roles of spin-orbit coupling that mediates the exchange and spin-orbit components of spin torque, and the kinetic and spin-orbit components of spin current accumulation. The angular dependence of cumulative spin-orbit torque (SOT) indicates a uniaxial MA corresponding to the out-of-plane rotations of magnetic moments of the free Fe layers. Different from the conventional MA energy calculation and the phenomenological theory for a whole MTJ, our results provide insight into the orbital-resolved SOT for atomistic spin dynamics simulation in emergency complex magnetic heterojunctions.
description: 12 pages, 6 figures
Performance of plastic scintillator modules for top veto tracker at Taishan Antineutrino Observatory
Creators: name: Luo, Guang
name: Yin, Xiaohao
name: An, Fengpeng
name: Wang, Zhimin
name: Hor, Y. K.
name: Lu, Peizhi
name: Li, Ruhui
name: Li, Yichen
name: He, Wei
name: Wang, Wei
name: Xiao, Xiang
Publisher: name: arXiv
Year: 2024
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The Taishan Antineutrino Observatory (TAO) experiment incorporates a top veto tracker (TVT) system comprising 160 modules, each composed of plastic scintillator (PS) strips, embedded wavelength shifting fibers (WLS-fibers), and silicon photomultipliers (SiPMs). This article highlights the performance of all produced modules following the production and readout/trigger design, providing insights for scintillation detectors with WLS-fibers. Three kinds of trigger modes and its efficiency have been defined to comprehensively evaluate the performance of this unique design, which has been verified for the batch production, along with comprehensive measurement strategies and quality inspection methods. In "module" mode, the detection(tagging) efficiency of the PS exceeds 99.67\% at a 30 photoelectron threshold, and even in "AND" mode, it surpasses 99.60\% at a 15 photoelectron threshold. The muon tagging efficiency meets TAO's requirements. The production and performance of the PS module set a benchmark for other experiments, with optimized optical fiber arrangements that enhance light yield and muon detection efficiency.
Interpreting the 750 GeV diphoton excess in minimal extensions of Two-Higgs-Doublet models
Creators: name: Badziak, Marcin
Publisher: name: arXiv
Year: 2015
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: It is shown that the 750 GeV diphoton excess can be explained in extensions of Two-Higgs-Doublet Models that do not involve large multiplicities of new electromagnetically charged states. The key observation is that at moderate and large $\tanβ$ the total decay width of the 750 GeV Higgs is strongly reduced as compared to the Standard Model. This allows for much more economical choices of new states that enhance the diphoton signal to fit the data. In particular, it is shown that one family of vector-like quarks and leptons with SM charges is enough to explain the 750 GeV diphoton excess. Moreover, such charge assignment can keep the 125 GeV Higgs signal rates exactly at the SM values. The scenario can interpret the diphoton excess provided that the total decay width of a hypothetical resonance that would be measured at the LHC turns out to not exceed few GeV.
description: 11 pages, 4 figures; v2: fig.3, discussion of ditau constraints, comments and references added; to appear in PLB
title: Teaching Object-Oriented Programming with the Objects-first Approach
title: An Experience Report
titleType: Subtitle
Creators: name: Speth, Sandro
Publisher: name: Gesellschaft für Informatik, Bonn
Year: 2023
Subjects: subject: Programming Introductory Course
subject: Objects-first
subject: Teaching Programming

description: Lecturers worldwide continue to discuss suitable approaches to teach students programming concepts in general and object-oriented programming in particular. When using the so-called objects-first approach --in contrast to the established bottom-up approach --students start right from the beginning with objects and their interfaces and then only gradually learn more object-internal concepts, such as implementing operation bodies by using variables and control flow constructs. This gives students, from the start, a better object-oriented way of thinking, which is often much harder to learn properly in bottom-up approaches. In this paper, we describe the structure and design considerations and report our experience in implementing our introductory programming course based on the objects-first approach. We outline which concepts we teach, when and to which extent, and discuss the pros and cons of our implementation, considering student feedback from teaching evaluations.
Sonnenfleckenzeichnung Nr. 26837.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 01.02.1984, erstellt von Hans Ulrich Keller
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1984

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g)
The abundance and spatial distribution of ultra-diffuse galaxies in nearby galaxy clusters
Creators: name: van der Burg, Remco F. J.
name: Muzzin, Adam
name: Hoekstra, Henk
Publisher: name: arXiv
Year: 2016
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recent observations have highlighted a significant population of faint but large (r_eff>1.5 kpc) galaxies in the Coma cluster. The origin of these Ultra Diffuse Galaxies (UDGs) remains puzzling, as the interpretation of the observational results has been hindered by the subjective selection of UDGs, and the limited study of only the Coma (and some examples in the Virgo-) cluster. We extend the study of UDGs using 8 clusters in the redshift range 0.044
description: 12 pages, 11 figures. Accepted for publication in A&A after minor revision
Axion-pion thermalization rate in unitarized NLO chiral perturbation theory
Creators: name: Di Luzio, Luca
name: Camalich, Jorge Martin
name: Martinelli, Guido
name: Oller, José Antonio
name: Piazza, Gioacchino
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We compute the axion-pion scattering $a π\to ππ$, relevant for the axion thermalization rate in the early universe, within unitarized NLO chiral perturbation theory. The latter extends the range of validity of the chiral expansion of axion-pion scattering and thus provides a crucial ingredient for the reliable determination of the relic density of thermal axions, whenever the axion decoupling temperature is below that of the QCD phase transition. Implications for cosmological observables are briefly discussed.
description: 13 pages, 12 figures. Typos corrected and slightly changed results. Extended discussion and appendix added
The phenomenon of diversity and the effective response to the physical environment: the formation of old traditional markets (Suq)
Creators: name: Hmood, Kabila Faris
name: Goussous, Jawdat
Publisher: name: Conservation Science in Cultural Heritage
Year: 2023

description: Many cities worldwide take pride in their traditional markets. This research aims to verify the importance of lessons learned from old traditional markets, characterized by the effective response to their physical environment. This main aim leads to many secondary aims. First is the aim to explain the role of the phenomena of diversity in the establishment of various markets. Second, the research aims to explain the relationship between the specialization of goods, the architectural form and general planning of the market. Third, the research aims to investigate the relationship between markets and the diversity of the goods, width of the corridors, roofing style, and how this diversity affects shoppers, as well as interacting among the shoppers themselves. The research adopts a descriptive analytical methodology for a number of market types in order to study the morphology of traditional markets, their form, their urban context, and their relationship with the diversity of the goods and the impact it has on shoppers. The most important conclusion reached by the research is that the diversity in the morphology of traditional markets corresponds to the diversity and change of goods, the width of the corridors and the style of the roof … etc. This diversity affects shoppers and generates a state of pleasure and social interaction.
description: Conservation Science in Cultural Heritage, Vol. 22 (2022)
title: On Developing an E-Assessment Tool for Agile Practices
Creators: name: Jacob, Kerstin
name: Hallmann, Daniel
name: Luettgen, Gerald
name: Völpel, Vanessa
Publisher: name: Gesellschaft für Informatik, Bonn
Year: 2023
Subjects: subject: agile software development
subject: e-assessment tool
subject: Scrum

description: As agile software development processes are widely applied in industry, students need to develop a good understanding of agile principles and practices as part of their education. During our ten years of experience with teaching the Scrum framework in team project modules, we noticed that students frequently struggle with writing good user stories and concise sprint goals. To support students in mastering basic practices and to free limited teaching resources for more in-depth discussions on advanced topics, e-assessment tools should be developed to provide timely feedback on at least common mistakes. This paper argues that, and sketches how, research on quality criteria for artifacts of agile development can serve as the basis for such a tool. However, multiple challenges remain that we invite lecturers and researchers to discuss.
Reduced quantum dynamics with initial system-environment correlations characterized by pure Markov states
Creators: name: Türkmen, A.
name: Verçin, A.
name: Yılmaz, S.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: Any tripartite state which saturates the strong subadditivity relation for the quantum entropy is defined as the Markov state.A tripartite pure state describing an open system, its environment and their purifying system isa pure Markov state iff the bipartite marginal state of purifying system and environment is a product state. It has been shown that as long as the purification of the input system-environment state is a pure Markov state the reduced dynamics of the open system can be described, on the support of initial system state, by a quantum channel for every joint unitary evolution of the system-environment composite even in the presence of initial correlations. Entanglement, discord and classical correlations of the initial system-environment states implied by the pure Markov state are analyzed and it has been shown that all these correlations are entirely specified by the entropy of the environment. Some implications concerning perfect quantum error correction procedure and quantum Markovian dynamics are presented.
description: 9 pages, Accepted version
Sonnenfleckenzeichnung Nr. 26825.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 11.01.1984, erstellt von Hans Ulrich Keller
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1984

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g) und darüber hinaus einer Spalte für A: mit Hilfe eines korrekt-reduzierenden optischen Filters von blossem Auge sichtbare Flecken
Non-Hermitian Floquet dynamics in absorption spectroscopy
Creators: name: Potvliege, R M
Publisher: name: arXiv
Year: 2024
Subjects: subject: Quantum Physics (quant-ph)
subject: Other Condensed Matter (cond-mat.other)
subject: Atomic Physics (physics.atom-ph)
subject: Computational Physics (physics.comp-ph)
subject: FOS: Physical sciences

description: A theory of the absorption of a laser field by an atomic or condensed matter medium is presented for the case where the medium is also interacting with a strong electromagnetic field. The rotating wave approximation is not assumed for the latter. It is shown that in the weak probe limit the Lindblad master equation reduces to a smaller system of linear equations for the relevant steady state coherences. In this limit, the complex susceptibility of the medium can be expressed in terms of individual contributions of decaying dressed states, the latter being eigenstates of a non-Hermitian Floquet Hamiltonian.
A computer code for forward calculation and inversion of the H/V spectral ratio under the diffuse field assumption
Creators: name: García-Jerez, Antonio
name: Piña-Flores, José
name: Sánchez-Sesma, Francisco J.
name: Luzón, Francisco
name: Perton, Mathieu
Publisher: name: arXiv
Year: 2016
Subjects: subject: Geophysics (physics.geo-ph)
subject: FOS: Physical sciences

description: During a quarter of a century, the main characteristics of the horizontal-to-vertical spectral ratio of ambient noise HVSRN have been extensively used for site effect assessment. In spite of the uncertainties about the optimum theoretical model to describe these observations, several schemes for inversion of the full HVSRN curve for near surface surveying have been developed over the last decade. In this work, a computer code for forward calculation of H/V spectra based on the diffuse field assumption (DFA) is presented and tested.It takes advantage of the recently stated connection between the HVSRN and the elastodynamic Green's function which arises from the ambient noise interferometry theory. The algorithm allows for (1) a natural calculation of the Green's functions imaginary parts by using suitable contour integrals in the complex wavenumber plane, and (2) separate calculation of the contributions of Rayleigh, Love, P-SV and SH waves as well. The stability of the algorithm at high frequencies is preserved by means of an adaptation of the Wang's orthonormalization method to the calculation of dispersion curves, surface-waves medium responses and contributions of body waves. This code has been combined with a variety of inversion methods to make up a powerful tool for passive seismic surveying.
description: Published in Computers & Geosciences 97, 67-78
title: Peritoneal pelvic adhesions in women: frequently advocated in repetitive addominal pain but not always demonstrated and classified by Imaging.
Creators: name: Guzzetta, GRAZIA
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Obstruction / Occlusion
subject: Hysterosalpingography
subject: MR
subject: Fluoroscopy
subject: Genital / Reproductive system female
subject: Abdomen

description: Learning objectives Background Imaging findings OR Procedure details Conclusion Personal Information References
description: Learning objectives: Among significant causes of pelvic adhesions, the most frequently are: post-surgical procedures, endometriosis and peritoneal inflammation disease. The adhesion consequences are: displacement of utero-vaginal structures, angulated bowel...
Proarna insignis Stal 1864
Creators: name: Salazar, Julián A.
name: Sanborn, Allen
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadidae
Proarna
Proarna insignis

description: “ Proarna (circa) insignis ”
 es P. invaria (Walker, 1850) (fig. 12)
description: Published as part of Salazar, Julián A. & Sanborn, Allen, 2009, Nota Rectificativa sobre Artículo, pp. 270-271 in Boletím Científico Centro de Museos Museo de Historia Natural 13 (2) on page 270, DOI: 10.5281/zenodo.10062795
Sonnenfleckenzeichnung Nr. 26818.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 02.01.1984, erstellt von Hans Ulrich Keller
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1984

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g) und darüber hinaus einer Spalte für A: mit Hilfe eines korrekt-reduzierenden optischen Filters von blossem Auge sichtbare Flecken
Sonnenfleckenzeichnung Nr. 26836.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 31.01.1984, erstellt von Hans Ulrich Keller
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1984

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g) und darüber hinaus einer Spalte für A: mit Hilfe eines korrekt-reduzierenden optischen Filters von blossem Auge sichtbare Flecken
title: One year using the Modified Single Incision Technique (MSIT) for subcutaneous chest-port placement: one center experience
Creators: name: Romero Jaramillo, Alejandro
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Interventional vascular
subject: Vascular
subject: Oncology
subject: Fluoroscopy
subject: Venous access
subject: Catheters
subject: Technical aspects
subject: Neoplasia
subject: Metastases

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: To describe MSIT, our experience and results with the first100 cases during the first year using this...
title: OPPSEE - Eine Online-Plattform zum Programmieren Üben
Creators: name: Schmolitzky, Axel
name: Burau, Henri
Publisher: name: Gesellschaft für Informatik, Bonn
Year: 2023
Subjects: subject: Programmieren
subject: Programmierlehre
subject: Softwareentwicklung
subject: Automatisierte Bewertung von Software
subject: Programmierplattformen

description: Programmieren Können ist eine Kernkompetenz für Informatiker*innen. Um gut Program-mieren zu können, ist sehr viel Programmieren Üben notwendig. Es gibt etliche Online-Plattformen, auf denen Programmieraufgaben zum Üben zur Verfügung gestellt werden. Ein Problem für Lernende auf diesen Plattformen ist häufig, die zum eigenen Lernfortschritt passenden Aufgaben zu finden. Wir stellen eine neue Plattform mit einem klaren Fokus auf das Programmieren Üben vor und beschreiben ihre flexible Architektur.
Hypercubes and Hamilton cycles of display sets of rooted phylogenetic networks
Creators: name: Döcker, Janosch
name: Linz, Simone
name: Semple, Charles
Publisher: name: arXiv
Year: 2022
Subjects: subject: Combinatorics (math.CO)
subject: Data Structures and Algorithms (cs.DS)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: In the context of reconstructing phylogenetic networks from a collection of phylogenetic trees, several characterisations and subsequently algorithms have been established to reconstruct a phylogenetic network that collectively embeds all trees in the input in some minimum way. For many instances however, the resulting network also embeds additional phylogenetic trees that are not part of the input. However, little is known about these inferred trees. In this paper, we explore the relationships among all phylogenetic trees that are embedded in a given phylogenetic network. First, we investigate some combinatorial properties of the collection P of all rooted binary phylogenetic trees that are embedded in a rooted binary phylogenetic network N. To this end, we associated a particular graph G, which we call rSPR graph, with the elements in P and show that, if |P|=2^k, where k is the number of vertices with in-degree two in N, then G has a Hamiltonian cycle. Second, by exploiting rSPR graphs and properties of hypercubes, we turn to the well-studied class of rooted binary level-1 networks and give necessary and sufficient conditions for when a set of rooted binary phylogenetic trees can be embedded in a level-1 network without inferring any additional trees. Lastly, we show how these conditions translate into a polynomial-time algorithm to reconstruct such a network if it exists.
description: final version of accepted manuscript
title: Digitale Prüfungen für Softwareentwicklung im 'Bring Your Own Device, Open Book, Open Web'-Format
Creators: name: Böttcher, Axel
name: Thurner, Veronika
Publisher: name: Gesellschaft für Informatik, Bonn
Year: 2023
Subjects: subject: Digitale Prüfungen
subject: Fernprüfungen
subject: Programmierausbildung

description: Im Sinne des praxisnahen, kompetenzorientierten Prüfens bieten sich zur Erhebung des studentischen Leistungsstandes in der Softwareentwicklung praktische Prüfungen an, mit Nutzung der für die Studierenden individuell gewohnten integrierten Entwicklungsumgebung (IDE) und freier Recherchemöglichkeit. Das Format der „Bring Your Own Device, Open Book, Open Web“-Prüfung wird diesem Anspruch gerecht. Dabei arbeiten die Studierenden auf ihren eigenen Geräten gegen vorgegebene git-Repositories, bei vollem Zugriff auf Wissensressourcen und Internet. Wir haben dieses Prüfungsformat sowohl im Rahmen von Präsenz-als auch von Fernprüfungen erprobt und auf Stärken und Schwächen analysiert. Als eine der wesentlichen Herausforderungen erweist sich das Finden geeigneter Aufgaben, die einen angemessenen Schwierigkeitsgrad aufweisen und deren Lösung sich dabei nicht ohne weiteres recherchieren lässt. Wir beschreiben zentrale Randbedingungen des Prüfungsformates, insbesondere mit Blick auf die technische und organisatorische Durchführbarkeit. Ergänzend diskutieren wir ver-schiedene Aufgabenformate unter Gesichtspunkten wie adressierte Kompetenzebene, Korrigierbarkeit und Sicherheit gegen Täuschungsversuche.
Thermoelectric study of dissipative quantum dot heat engines
Creators: name: De, Bitan
name: Muralidharan, Bhaskaran
Publisher: name: arXiv
Year: 2016
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: This paper examines the thermoelectric response of a dissipative quantum dot heat engine based on the Anderson-Holstein model in two relevant operating limits: (i) when the dot phonon modes are out of equilibrium, and (ii) when the dot phonon modes are strongly coupled to a heat bath. In the first case, a detailed analysis of the physics related to the interplay between the quantum dot level quantization, the on-site Coulomb interaction and the electron-phonon coupling on the thermoelectric performance reveals that an n-type heat engine performs better than a p-type heat engine. In the second case, with the aid of the dot temperature estimated by incorporating a {\it{thermometer bath}}, it is shown that the dot temperature deviates from the bath temperature as electron-phonon interaction becomes stronger. Consequently, it is demonstrated that the dot temperature controls the direction of phonon heat currents, thereby influencing the thermoelectric performance. Finally, the conditions on the maximum efficiency with varying phonon couplings between the dot and all the other macroscopic bodies are analyzed in order to reveal the nature of the optimum junction.
description: 10 pages, 9 figures, To be published in Phys Rev. B
Sonnenfleckenzeichnung Nr. 26831.
Zeichnung von Flecken und Fackelflächen zur Ermittlung der Sonnenaktivität am 25.01.1984, erstellt von Hans Ulrich Keller
Creators: name: [s.n.]
Publisher: name: [s.n.]
Year: 1984

description: Bleistiftzeichnung mit Tinte und Farbstift überschrieben, erstellt als Projektionsbildzeichnung in der Eidgenössischen Sternwarte Zürich. Instrument: Zeiss Coudé-Refraktor (150/2250 mm).
Die Beobachtungen zu Einzelflecken und zu Sonnenfleckengruppen wurden mit Bleistift auf einem Vordruck eingetragen. Zusätzlich notiert: Tabelle mit den statistischen Angaben, für die Werte g, f sowie Gr (Anzahl g) und darüber hinaus einer Spalte für A: mit Hilfe eines korrekt-reduzierenden optischen Filters von blossem Auge sichtbare Flecken
Bidirectional Wave-Propelled Capillary Spinners
Creators: name: Barotta, Jack-William
name: Thomson, Stuart J.
name: Alventosa, Luke F. L.
name: Lewis, Maya
name: Harris, Daniel M.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: When a solid body floats at the interface of a vibrating liquid bath, the relative motion between the object and interface generates outwardly propagating surface waves. It has recently been demonstrated that millimetric objects with fore-aft mass asymmetry generate an associated asymmetric wavefield and consequently self-propel in unidirectional motion. Harnessing this wave-powered mechanism of propulsion, we here demonstrate that chiral objects placed on a vibrating fluid interface are set into steady, yet reversible, rotation, with the angular speed and direction of rotation controlled by the interplay between object geometry and driving parameters. Scaling laws and a simplified model of the wavefield reveal the underlying physical mechanism of rotation, while collapsing experimental measurements of the angular velocity across parameters. Leveraging the control over the chiral object's direction of rotation, we then demonstrate that a floating body with an asymmetric mass distribution and chirality can be remotely steered along two-dimensional trajectories via modulation of the driving frequency alone. This accessible and tunable macroscopic system serves as a potential platform for future explorations of chiral active and driven matter, and demonstrates a mechanism by which wave-mediated fluid forces can be manipulated for directed propulsion.
title: CT angiography of the supra-aortic vessels with 80 kV tube voltage
Creators: name: Michels, Peter
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Vascular
subject: CT-Angiography
subject: Technical aspects
subject: Physics
subject: Contrast agent-intravenous
subject: Arteriosclerosis

description: Purpose Methods and Materials Results Conclusion Personal Information References
description: Purpose: We investigated the diagnostic quality of CT angiography in the region of the skull base with 80 kV tube voltage. For CT angiography of the extracranial carotid artery, there are already studies that prove a better contrast with reduced tube...
title: Accelerated quantitative multi-material beam hardening correction(BHC) in cone-beam CT
Creators: name: Yang, Qiao
Publisher: name: European Congress of Radiology
Year: 2012
Subjects: subject: Artifacts
subject: Computer Applications-3D
subject: Image manipulation / Reconstruction
subject: CT
subject: Radiation physics

description: Purpose Methods and Materials Results Conclusion References Personal Information
description: Purpose: In computed tomography(CT), nonlinear characteristics of beam hardening are caused by polychromaticity of x-rays, which severely degrade CT image quality and diagnostic accuracy. Current correction approaches used in clinical CT are mainly based on...