cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Cooperation driven by success-driven group formation
Creators: name: Szolnoki, Attila
name: Chen, Xiaojie
Publisher: name: arXiv
Year: 2016
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Computer Science and Game Theory (cs.GT)
subject: Populations and Evolution (q-bio.PE)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences
subject: FOS: Biological sciences

description: In the traditional setup of public goods game all players are involved in every available groups and the mutual benefit is shared among competing cooperator and defector strategies. But in real life situations the group formation of players could be more sophisticated because not all players are attractive enough for others to participate in a joint venture. What if only those players can initiate a group formation and establish a game who are successful enough to the neighbors? To elaborate this idea we employ a modified protocol and demonstrate that a carefully chosen threshold to establish joint venture could efficiently improve the cooperation level even if the synergy factor would suggest a full defector state otherwise. The microscopic mechanism which is responsible for this effect is based on the asymmetric consequences of competing strategies: while the success of a cooperator provides a long-time well-being for the neighborhood, the temporary advantage of defection cannot be maintained if the protocol is based on the success of leaders.
description: 9 two-column pages, 6 figures; accepted for publication in Physical Review E
The applicability of traditional theories of business strategy to e-business
Creators: name: Khoo, Chuang Li.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Glycopenia - induced sympathoadrenal activation in diabetes mellitus and uncontrolled arterial hypertension : an observational study
Creators: name: Abobarin-Adeagbo, Abimbola
name: Wienke, Andreas
name: Girndt, Matthias
name: Pliquett, Rainer U.
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2020
Subjects: subject: 610

description: Background: Aim of this study is to investigate a possible association of hypoglycemic episodes and arterial hypertension. We hypothesize that hospitalized insulin-treated diabetes patients with hypertensive crisis have more hypoglycemic episodes than their counterparts without hypertensive crisis on admission. Methods: In a prospective, observational cohort study, 65 insulin-treated diabetes patients (type 1, type 2, type 3c) were included in Group 1, when a hypertensive crisis was present, as control patients in Group 2 without hypertensive crisis or hypoglycemia, in Group 3, when a symptomatic hypoglycemia was present on admission. All patients were subjected to open-label continuous glucose monitoring, 24-h blood-pressure- and Holter electrocardiogram recordings, and to laboratory tests including plasma catecholamines. Results: 53 patients, thereof 19 Group-1, 19 Group-2, 15 Group-3 patients, completed this study. Group-1 patients had the highest maximum systolic blood pressure, a higher daily cumulative insulin dose at admission, a higher body-mass index, and a higher plasma norepinephrine than control patients of Group 2. Group-3 patients had more documented hypoglycemic episodes (0.8 ± 0.5 per 24 h) than Group-2 patients (0.2 ± 0.3 per 24 h), however, they were not different to the ones in Group-1 patients (0.4 ± 0.4 per 24 h). Plasma norepinephrine and mean arterial blood pressure were higher Group-1 and Group-3 patients than in control patients of Group 2. At discharge, the daily cumulative insulin dose was reduced in Group-1 (− 18.4 ± 24.9 units) and in Group-3 patients (− 18.6 ± 22.7 units), but remained unchanged in Group-2 control patients (− 2.9 ± 15.6 units). Conclusions: An association between hypoglycemic events and uncontrolled hypertension was found in this study.
Covariant dynamics on the energy-momentum space: scalar field theory
Creators: name: Ivetic, Boris
Publisher: name: arXiv
Year: 2022
Subjects: subject: General Physics (physics.gen-ph)
subject: FOS: Physical sciences

description: A scalar field theory is constructed on an energy-momentum background of constant curvature. The generalization of the usual Feynamn rules for the flat geometry follows from the requirement of their covariance. The main result is that the invariant amplitudes are finite at all orders of the perturbation theory, due to the finitness of the momentum space. Finally, the relation with a field theory in spacetime representation is briefly discussed.
Light-Front spin-dependent Spectral Function and Nucleon Momentum Distributions for a Three-Body System
Creators: name: Del Dotto, Alessio
name: Pace, Emanuele
name: Salmè, Giovanni
name: Scopetta, Sergio
Publisher: name: arXiv
Year: 2016
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Poincare' covariant definitions for the spin-dependent spectral function and for the momentum distributions within the light-front Hamiltonian dynamics are proposed for a three-fermion bound system, starting from the light-front wave function of the system. The adopted approach is based on the Bakamjian-Thomas construction of the Poincare' generators, that allows one to easily import the familiar and wide knowledge on the nuclear interaction into a light-front framework. The proposed formalism can find useful applications in refined nuclear calculations, like the ones needed for evaluating the EMC effect or the semi-inclusive deep inelastic cross sections with polarized nuclear targets, since remarkably the light-front unpolarized momentum distribution by definition fulfills both normalization and momentum sum rules. It is also shown a straightforward generalization of the definition of the light-front spectral function to an A-nucleon system.
Chaos and pole-skipping in a simply spinning plasma
Creators: name: Amano, Markus A. G.
name: Blake, Mike
name: Cartwright, Casey
name: Kaminski, Matthias
name: Thompson, Anthony P.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Chaotic Dynamics (nlin.CD)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We study the relationship between many-body quantum chaos and energy dynamics in holographic quantum field theory states dual to the simply-spinning Myers-Perry-AdS$_5$ black hole. The enhanced symmetry of such black holes allows us to provide a thorough examination of the phenomenon of pole-skipping, that is significantly simpler than a previous analysis of quantum field theory states dual to the Kerr-AdS$_4$ solution. In particular we give a general proof of pole-skipping in the retarded energy density Green's function of the dual quantum field theory whenever the spatial profile of energy fluctuations satisfies the shockwave equation governing the form of the OTOC. Furthermore, in the large black hole limit we are able to obtain a simple analytic expression for the OTOC for operator configurations on Hopf circles, and demonstrate that the associated Lyapunov exponent and butterfly velocity are robustly related to the locations of a family of pole-skipping points in the energy response. Finally, we note that in contrast to previous studies, our results are valid for any value of rotation and we are able to numerically demonstrate that the dispersion relations of sound modes in the energy response explicitly pass through our pole-skipping locations.
description: Main text: 19 pages, 3 figures, 3 appendices, comments welcome!
High-phosphorus diets reduce aortic lesions and cardiomyocyte size and modify lipid metabolism in Ldl receptor knockout mice
Creators: name: Grundmann, Sarah Maria
name: Schutkowski, Alexandra
name: Berger, Christian
name: Bailer, Anja Christina
name: König, Bettina
name: Stangl, Gabriele I.
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2020
Subjects: subject: 572

description: The consumption of phosphorus in Western populations largely exceeds the recommended intake, while vitamin D supply is often insufficient. Both situations are linked to an increased cardiovascular risk. A 17-week two-factorial study with Ldl receptor-/- mice was conducted to investigate the cardiovascular impact of dietary phosphorus [adequate (0.3%; P0.3) vs. high (1.5%; P1.5)] in combination with a low (50 IU/kg; D50) or adequate vitamin D diet (1000 IU/kg; D1000). The data demonstrate that mice fed the P1.5 vs. P0.3 diets developed smaller vascular lesions (p = 0.013) and cardiac hypotrophy (p = 0.011), which were accompanied by diminished IGF1 and insulin signalling activity in their hearts. Vitamin D showed no independent effect on atherogenesis and heart morphology. Feeding P1.5 vs. P0.3 diets resulted in markedly reduced serum triacylglycerols (p < 0.0001) and cholesterol (p < 0.0001), higher faecal lipid excretion (p < 0.0001) and a reduced mRNA abundance of hepatic sterol exporters and lipoprotein receptors. Minor hypocholesterolaemic and hypotriglyceridaemic effects were also found in mice fed the D1000 vs. D50 diets (p = 0.048, p = 0.026). To conclude, a high phosphorus intake strongly affected the formation of vascular lesions, cardiac morphology, and lipid metabolism, although these changes are not indicative of an increased cardiovascular risk.
Conflict-based Search for Multi-Robot Motion Planning with Kinodynamic Constraints
Creators: name: Kottinger, Justin
name: Almagor, Shaull
name: Lahijanian, Morteza
Publisher: name: arXiv
Year: 2022
Subjects: subject: Robotics (cs.RO)
subject: Multiagent Systems (cs.MA)
subject: FOS: Computer and information sciences

description: Multi-robot motion planning (MRMP) is the fundamental problem of finding non-colliding trajectories for multiple robots acting in an environment, under kinodynamic constraints. Due to its complexity, existing algorithms either utilize simplifying assumptions or are incomplete. This work introduces kinodynamic conflict-based search (K-CBS), a decentralized (decoupled) MRMP algorithm that is general, scalable, and probabilistically complete. The algorithm takes inspiration from successful solutions to the discrete analogue of MRMP over finite graphs, known as multi-agent path finding (MAPF). Specifically, we adapt ideas from conflict-based search (CBS) - a popular decentralized MAPF algorithm - to the MRMP setting. The novelty in this adaptation is that we work directly in the continuous domain, without the need for discretization. In particular, the kinodynamic constraints are treated natively. K-CBS plans for each robot individually using a low-level planner and and grows a conflict tree to resolve collisions between robots by defining constraints for individual robots. The low-level planner can be any sampling-based, tree-search algorithm for kinodynamic robots, thus lifting existing planners for single robots to the multi-robot settings. We show that K-CBS inherits the (probabilistic) completeness of the low-level planner. We illustrate the generality and performance of K-CBS in several case studies and benchmarks.
description: 7 pages, 6 figures, and 2 algorithms. To be presented at International Conference on Intelligent Robots and Systems (IROS) in October 2022
Flavor-changing light bosons with accidental longevity
Creators: name: Ema, Yohei
name: Liu, Zhen
name: Lyu, Kun-Feng
name: Pospelov, Maxim
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We consider a model with a complex scalar field that couples to $(e,μ)$ or $(μ,τ)$ within the "longevity" window: $[|m_{l_1} - m_{l_2}|, m_{l_1} + m_{l_2}]$ in which $l_1$ and $l_2$ are the two different charged leptons. Within such a mass window, even a relatively large coupling (e.g. of the size commensurate with the current accuracy/discrepancy in the muon $g-2$ experiment) leads to long lifetimes and macroscopic propagation distance between production and decay points. We propose to exploit several existing neutrino experiments and one future experiment to probe the parameter space of this model. For the $μ-e$ sector, we exploit the muonium decay branching ratio and the production and decay sequence at the LSND experiment, excluding the parametric region suggested by $g_μ-2$ anomaly. For the $τ-μ$ sector, we analyze three main production mechanisms of scalars at beam dump experiments: the Drell-Yan process, the heavy meson decay, and the muon scattering. We explore the constraints from the past CHARM and NuTeV experiments, and evaluate sensitivity for the proposed beam dump experiment, SHiP. The latter can thoroughly probe the parameter space relevant for the $g_μ- 2$ anomaly.
description: 30 pages, 9 figures and comments welcome
Phase Diagram Detection via Gaussian Fitting of Number Probability Distribution
Creators: name: Contessi, Daniele
name: Recati, Alessio
name: Rizzi, Matteo
Publisher: name: arXiv
Year: 2022
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We investigate the number probability density function that characterizes sub-portions of a quantum many-body system with globally conserved number of particles. We put forward a linear fitting protocol capable of mapping out the ground-state phase diagram of the rich one-dimensional extended Bose-Hubbard model: The results are quantitatively comparable with more sophisticated traditional and machine learning techniques. We argue that the studied quantity should be considered among the most informative bipartite properties, being moreover readily accessible in atomic gases experiments.
Steering magnonic dynamics and permeability at exceptional points in a parity–time symmetric waveguide
Creators: name: Wang, Xi-Guang
name: Guo, Guang-Hua
name: Berakdar, Jamal
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2020
Subjects: subject: 530

description: Tuning the magneto optical response and magnetic dynamics are key elements in designing magnetic metamaterials and devices. This theoretical study uncovers a highly effective way of controlling the magnetic permeability via shaping the magnonic properties of coupled magnetic waveguides separated by a nonmagnetic spacer with strong spin–orbit interaction (SOI). We demonstrate how a spacer charge current leads to enhancement of magnetic damping in one waveguide and a decrease in the other, constituting a bias-controlled magnetic parity–time (PT) symmetric system at the verge of the exceptional point where magnetic gains/losses are balanced. We find phenomena inherent to PT-symmetric systems and SOI-driven interfacial structures, including field-controlled magnon power oscillations, nonreciprocal propagation, magnon trapping and enhancement as well as an increased sensitivity to perturbations and abrupt spin reversal. The results point to a new route for designing magnonic waveguides and microstructures with enhanced magnetic response.
Principal component analysis on Australian and German bank bill futures
Creators: name: Tjangdjaja, Jason.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Deformation and orientation statistics of neutrally buoyant sub-Kolmogorov ellipsoidal droplets in turbulent Taylor-Couette flow
Creators: name: Spandan, Vamsi
name: Verzicco, Roberto
name: Lohse, Detlef
Publisher: name: arXiv
Year: 2016
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The influence of the underlying flow topology on the shape and size of sub-Kolmogorov droplets dispersed in a turbulent flow is of considerable interest in many industrial and scientific applications. In this work we study the deformation and orientation statistics of sub-Kolmogorov droplets dispersed into a turbulent Taylor-Couette flow. Along with Direct Numerical Simulations (DNS) of the carrier phase and Lagrangian tracking of the dispersed droplets, we solve a phenomenological equation proposed by Maffettone and Minale (\emph{J. Fluid Mech.} 78, 227-241 (1998)) to track the shape evolution and orientation of approximately $10^5$ ellipsoidal droplets. By varying the capillary number $Ca$ and viscosity ratio $\hat μ$ of the droplets we find that the droplets deform more with increasing capillary number $Ca$ and this effect is more pronounced in the boundary layer regions. This indicates that along with a capillary number effect there is also a strong correlation between spatial position and degree of deformation of the droplet. Regardless of the capillary number $Ca$, the major-axis of the ellipsoids tends to align with the stream-wise direction and the extensional strain rate eigen direction in the boundary layer region while the distribution is highly isotropic in the bulk. When the viscosity ratio between the droplet and the carrier fluid is increased we find that there is no preferential stretched axis which is due to the increased influence of rotation over stretching and relaxation. Droplets in high viscosity ratio systems are thus less deformed and oblate (disk-like) as compared to highly deformed prolate (cigar-like) droplets in low viscosity ratio systems.
A configuration interaction correction on top of pair coupled cluster doubles
Creators: name: Nowak, Artur
name: Boguslawski, Katharina
Publisher: name: arXiv
Year: 2022
Subjects: subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Numerous numerical studies have shown that geminal-based methods are a promising direction to model strongly correlated systems with low computational costs. Several strategies have been introduced to capture the missing dynamical correlation effects, which typically exploit \textit{a posteriori} corrections to account for correlation effects associated with broken-pair states or inter-geminal correlations. In this article, we scrutinize the accuracy of the pair coupled cluster doubles (pCCD) method extended by configuration interaction (CI) theory. Specifically, we benchmark various CI models, including, at most double excitations against selected CC corrections as well as conventional single-reference CC methods. A simple Davidson correction is also tested. The accuracy of the proposed pCCD-CI approaches is assessed for challenging small model systems such as the \ce{N2} and \ce{F2} dimers and various di- and triatomic actinide-containing compounds. In general, the proposed CI methods considerably improve spectroscopic constants compared to the conventional CCSD approach, provided a Davidson correction is included in the theoretical model. At the same time, their accuracy lies between the linearized frozen pCCD and frozen pCCD variants.
description: 4 figures
Topological phonon polariton enhanced radiative heat transfer in bichromatic nanoparticle arrays mimicking Aubry-André-Harper model
Creators: name: Wang, B. X.
name: Zhao, C. Y.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: Topological phonon polaritons (TPhPs) are promising optical modes relevant in long-range radiative heat transfer, information processing and infrared sensing, whose topological protection is expected to enable their robust existence and transport. In this work we show that TPhPs can be supported in one-dimensional (1D) bichromatic silicon carbide nanoparticle (NP) chains, and demonstrate that they can considerably enhance radiative heat transfer for an array much longer than the wavelength of radiation. By introducing incommensurate or commensurate modulations on the interparticle distances, the NP chain can be regarded as an extension of the off-diagonal Aubry-André-Harper (AAH) model. By calculating the eigenstate spectra with respect to the modulation phase that creates a synthetic dimension, we demonstrate that under this type of modulation the chain supports nontrivial topological modes localized over the boundaries, since the present system inherits the topological property of two-dimensional integer quantum Hall systems. In this circumstance the gap-labeling theorem and corresponding Chern number can be used to characterize the features of band gaps and topological edge modes. Based on many-body radiative heat transfer theory for a set of dipoles, we theoretically show the presence of topological gaps and midgap TPhPs can substantially enhance radiative heat transfer for an array much longer than the wavelength of radiation. We show how the modulation phase that acts as the synthetic dimension can tailor the radiative heat transfer rate by inducing or annihilating topological modes. We also discuss the role of dissipation in the enhancement of radiative heat transfer. These findings therefore provide a fascinating route for tailoring near-field radiative heat transfer based on the concept of topological physics.
description: 13 pages, 7 figures, comments are welcome
Localization of Cofibration Categories and Groupoid $C^*$-algebras
Creators: name: Land, Markus
name: Nikolaus, Thomas
name: Szumiło, Karol
Publisher: name: arXiv
Year: 2016
Subjects: subject: Algebraic Topology (math.AT)
subject: Category Theory (math.CT)
subject: K-Theory and Homology (math.KT)
subject: Operator Algebras (math.OA)
subject: FOS: Mathematics
subject: 55U35, 46L80

description: We prove that relative functors out of a cofibration category are essentially the same as relative functors which are only defined on the subcategory of cofibrations. As an application we give a new construction of the functor that assigns to a groupoid its groupoid $C^*$-algebra and thereby its topological $K$-theory spectrum.
بررسی بلاغی شعر بشنوی کردی
Publisher: name: دانشگاه کردستان
Year: 2021

description: بشنوی کردی از جمله شاعران کرد در عصر عباسی است که نویسندگان او را شاعری نیکو دارای اشعار بسیار و نثرنویسی توانا توصیف کرده اند که در خوشی قریحه و توانایی برتردر زیبایی سبک و رسایی معنا در شعر امتیاز یافته و در حوزه فصاحت و بلاغت برجسته شده است. اخبار وارده از زندگی و اشعارش گویای تشیّع وی و ارادتش نسبت به پیامبر و خاندان آن حضرت است چنانکه "ابن شهرآشوب" او را از شاعرانی به شمار آورده که آشکارا به دوستی اهل بیت نبوت(ع) پرداخته است و صاحب کتاب «الغدیر» نیز وی را در زمره پیشگامان پرچمدار بلاغت و یکی از شاعران امامیه شمرده که به نشر و گسترش ادبیات همت گماشته است؛ وی دیوانی دارد مشتمل بر ابیاتی پراکنده در غزل، که نمایانگر برخورداری شاعر از تجربه عشقی آکنده از احساسات پاک و راستین است، همانگونه که مشتمل بر قصایدی در دوستی اهل بیت نبوت(ع) و ذکر فضایل آنان و نیز قصاید علوی می باشد. این مقاله نوآوری های اسالیب بلاغی (معانی، بیان و بدیع)و ویژگی های شعر بشنوی کردی را با تکیه بر منهج توصیفی- تحلیلی مورد بررسی قرار می دهد.
title: La transition du cycle 1 au cycle 2 : le développement de l'autonomie des élèves et routines mises en place par les enseignant.e.s
title: La transition du cycle 1 au cycle 2 : le développement de l'autonomie des élèves et routines mises en place par les enseignant.e.s
titleType: AlternativeTitle
Creators: name: Flückiger, Marie
name: Perez, Leslie
Publisher: name: Unknown
Year: 0
Subjects: subject: transition cycle 1 et 2
subject: attentes scolaires
subject: autonomie de l’élève
subject: routines scolaires
subject: gestion de classe
subject: enseignement

description: Quelles sont les attentes des enseignants en 5P en termes d’autonomie des élèves lors de la transition de la 4P à la 5P ? Ce mémoire s’intéresse à la transition du premier cycle au second cycle primaire définie comme un moment de changement important et, en même temps difficile pour les élèves. Des recherches ont mis en évidence l’importance des transitions scolaires et leurs effets sur la socialisation et la réussite des élèves en classe. Nous avons étudié comment les enseignant.e.s de 4P préparent cette transitions avec leurs élèves et ce que mettent en place les enseignant.e.s de 5P durant ce passage. De ce questionnement ont émergé deux hypothèses d’analyse : (1) les enseignants de 5P s’attendent à ce que les élèves sachent écouter une consigne et la mettre en oeuvre ; (2) les enseignants de 5P s’attendent à ce que les élèves sachent organiser leurs affaires personnelles et leur matériel en fonction du programme de la matinée. L’analyse des observations effectuées en classe et des entretiens individuels montrent l’importance de la mise en place de routines par les enseignant.e.s. En effet, les résultats indiquent combien l’autonomie des élèves se développe notamment grâce à la mise en place de types de routines : des routines d’exécution et de gestion. En conclusion, notre mémoire met en évidence des pistes pour tendre vers le développement de l’autonomie des élèves arrivant dans une nouvelle classe en 5P.
Time series properties of implied volatilities of Australian options on share price index futures
Creators: name: Wong, Su Leng.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Machine Learning for the Prediction of Converged Energies from Ab Initio Nuclear Structure Calculations
Creators: name: Knöll, Marco
name: Wolfgruber, Tobias
name: Agel, Marc L.
name: Wenz, Cedric
name: Roth, Robert
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: The prediction of nuclear observables beyond the finite model spaces that are accessible through modern ab initio methods, such as the no-core shell model, pose a challenging task in nuclear structure theory. It requires reliable tools for the extrapolation of observables to infinite many-body Hilbert spaces along with reliable uncertainty estimates. In this work we present a universal machine learning tool capable of capturing observable-specific convergence patterns independent of nucleus and interaction. We show that, once trained on few-body systems, artificial neural networks can produce accurate predictions for a broad range of light nuclei. In particular, we discuss neural-network predictions of ground-state energies from no-core shell model calculations for 6Li, 12C and 16O based on training data for 2H, 3H and 4He and compare them to classical extrapolations.
description: 7 pages, 5 figures, 1 table
Numerical solution of a bending-torsion model for elastic rods
Creators: name: Bartels, Sören
name: Reiter, Philipp
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2020
Subjects: subject: 510

description: Aiming at simulating elastic rods, we discretize a rod model based on a general theory of hyperelasticity for inextensible and unshearable rods. After reviewing this model and discussing topological effects of periodic rods, we prove convergence of the discretized functionals and stability of a corresponding discrete flow. Our experiments numerically confirm thresholds, e.g., for Michell’s instability, and indicate a complex energy landscape, in particular in the presence of impermeability.
Energy limit of compact isochronous cyclotrons
Creators: name: Kleeven, Wiel
Publisher: name: arXiv
Year: 2022
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: Existing analytical models for transverse beam dynamics in isochronous cyclotrons are often not valid or not precise for relativistic energies. The main difficulty in developing such models lies in the fact that cross-terms between derivatives of the average magnetic field and the azimuthally varying components cannot be neglected at higher energies. Taking such cross-terms rigorously into account results in an even larger number of terms that need to be included in the equations. In this paper, a method is developed which is relativistic correct and which provides results that are practical and easy to use. We derive new formulas, graphs and tables for the radial and vertical tunes in terms of the the flutter, its radial derivatives, the spiral angle and the relativistic gamma. Using this method, we study the $2ν_r=N$ structural resonance ($N$ is number of sectors) and provide formulas and graphs for its stopband. Combining those equations with the new equation for the verical tune, we find the stability zone and the energy limit of compact isochronous cyclotrons for any value of N. We confront the new analytical method with closed orbit simulations of the IBA C400 cyclotron for hadron therapy.
description: 65 pages, 17 figures
Laser-induced ultrafast demagnetization time and spin moment in ferromagnets: First-principles calculation
Creators: name: Zhang, G. P.
name: Si, M. S.
name: George, Thomas F.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: When a laser pulse excites a ferromagnet, its spin undergoes a dramatic change. The initial demagnetization process is very fast. Experimentally, it is found that the demagnetization time is related to the spin moment in the sample. In this study, we employ the first-principles method to directly simulate such a process. We use the fixed spin moment method to change the spin moment in ferromagnetic nickel, and then we employ the Liouville equation to couple the laser pulse to the system. We find that in general the dependence of demagnetization time on the spin moment is nonlinear: It decreases with the spin moment up to a point, after which an increase with the spin moment is observed, followed by a second decrease. To understand this, we employ an extended Heisenberg model, which includes both the exchange interaction and spin-orbit coupling. The model directly links the demagnetization rate to the spin moment itself and demonstrates analytically that the spin relaxes more slowly with a small spin moment. A future experimental test of our predictions is needed.
description: 9 pages 2 figures
Treatment of myeloid malignancies relapsing after allogeneic hematopoietic stem cell transplantation with venetoclax and hypomethylating agents : a retrospective multicenter analysis on behalf of the German Cooperative Transplant Study Group
Creators: name: Schuler, Esther
name: Wagner-Drouet, Eva
name: Ajib, Salem Abdulfatah
name: Bug, Gesine
name: Crysandt, Martina
name: Dressler, Sabine
name: Hausmann, Andreas
name: Heidenreich, Daniela
name: Hirschbühl, Klaus Hubert
name: Hoepting, Matthias
name: Jost, Edgar
name: Kaivers, Jennifer
name: Klein, Stefan
name: Koldehoff, Michael
name: Kordelas, Lambros
name: Kriege, Oliver
name: Müller, Lutz P.
name: Rautenberg, Christina
name: Schaffrath, Judith
name: Schmid, Christoph
name: Wolff, Daniel
name: Haas, Rainer
name: Bornhäuser, Martin
name: Schroeder, Thomas
name: Kobbe, Guido
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: 610

description: Treatment of relapse after allogeneic hematopoietic stem cell transplantation (alloHSCT) remains a great challenge. Aiming to evaluate the combination of venetoclax and hypomethylating agents (HMAClax) for the treatment of relapse of myeloid malignancies after alloHSCT, we retrospectively collected data from 32 patients treated at 11 German centers. Venetoclax was applied with azacitidine (n = 13) or decitabine (n = 19); 11 patients received DLI in addition. HMAClax was the first salvage therapy in 8 patients. The median number of cycles per patient was 2 (1–19). All but 1 patient had grade 3/4 neutropenia. Hospital admission for grade 3/4 infections was necessary in 23 patients (72%); 5 of these were fatal. In 30 evaluable patients, overall response rate (ORR) was 47% (14/30, 3 CR MRDneg, 5 CR, 2 CRi, 1 MLFS, 3 PR). ORR was 86% in first salvage patients versus 35% in later salvage patients (p = 0.03). In 6 patients with molecular relapse (MR), ORR was 67% versus 42% in patients with hematological relapse (HR) (n = 24, p = n.s.). After a median follow-up of 8.4 months, 25 patients (78%) had died and 7 were alive. Estimated median overall survival was 3.7 months. Median survival of patients with HMAClax for first versus later salvage therapy was 5.7 and 3.4 months (p = n.s.) and for patients with MR (not reached) compared to HR (3.4 months, p = 0.024). This retrospective case series shows that venetoclax is utilized in various different combinations, schedules, and doses. Toxicity is substantial and patients who receive venetoclax/HMA combinations for MR or as first salvage therapy derive the greatest benefit.
Business process reengineering with SAP R/3
Creators: name: Loke, Eugene W.
Publisher: name: Monash University
Year: 2022

description: This thesis was scanned from the print manuscript for digital preservation and is copyright the author.
 Researchers can access this thesis by asking their local university, institution or public library to
 make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
Disentangling the path of pollinator attraction in temporarily colored flowers
Creators: name: Boff, Samuel
name: Henrique, Jessica Amaral
name: Friedel, Anna
name: Raizer, Josué
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2021
Subjects: subject: 580

description: Plants may use different strategies to attract pollinators in long distance (e.g. floral display) and in short distance (e.g. ratio between differentially colored flowers) scales. The Verbenaceae Lantana canescens Kunth is a wide spread species in open sites of the Brazilian Pantanal wetland. Individuals of this generalist species can produce a variable number of open inflorescences with yellow and white flowers that are organized in whorls. In this study we tested the hypothesis that increased floral display (long distance attraction) and the ratio between yellow and white flowers (short distance attraction) enhances the number of pollinator species and individuals. We observed flower visitors and calculated floral parameters in 38 plots of 1 m2 each, that contained a varying number of flowering L. canescens individuals. Non-metric multidimensional scaling and Bray-Curtis distances were used to account for flower visitor composition and the relative visitation rate, respectively. We used a structural equation model to test the power of each predictor variable on the visitation rate and a covariance analysis to disentangle the effect of each independent variable on the frequency of plant-pollinator interactions. We found that the number of flower visitors and the visitation rate increased with increasing number of inflorescences. Disentangling long and short distance attraction indicated that the number of inflorescences (per plot) and the number of yellow flowers (yellowing effect) contributed most to flower visitation at long and short distance, respectively.
FeynGKZ: a Mathematica package for solving Feynman integrals using GKZ hypergeometric systems
Creators: name: Ananthanarayan, B.
name: Banik, Sumit
name: Bera, Souvik
name: Datta, Sudeepan
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: In the Lee-Pomeransky representation, Feynman integrals can be identified as a subset of Euler-Mellin integrals, which are known to satisfy Gel'fand-Kapranov-Zelevinsky (GKZ) system of partial differential equations. Here we present an automated package to derive the associated GKZ system for a given Feynman diagram and solve it in terms of hypergeometric functions using two equivalent algorithms, namely the triangulation method and the Gröbner deformation method. We present our code in the form of a Mathematica package FeynGKZ.wl which requires the softwares polymake, Macaulay2 and TOPCOM, and the packages AMBRE and Olsson.wl as dependencies. As applications of the package, we find series solutions to the GKZ systems of several one-loop and two-loop Feynman integrals. These are included in the file Examples.nb that can be downloaded along with the package from https://github.com/anant-group/FeynGKZ.
description: 26 pages, 1 figure, code repository: https://github.com/anant-group/FeynGKZ
A practical method to detect, analyse and engineer higher order Van Hove singularities in multi-band Hamiltonians
Creators: name: Chandrasekaran, Anirudh
name: Betouras, Joseph J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Materials Science (cond-mat.mtrl-sci)
subject: Superconductivity (cond-mat.supr-con)
subject: FOS: Physical sciences

description: We present a practical method to detect, diagnose and engineer higher order Van Hove singularities in multiband systems, with no restrictions on the number of bands and hopping terms. The method allows us to directly compute the Taylor expansion of the dispersion of any band at arbitrary points in momentum space, using a generalised extension of the Feynman Hellmann theorem, which we state and prove. Being fairly general in scope, it also allows us to incorporate and analyse the effect of tuning parameters on the low energy dispersions, which can greatly aid the engineering of higher order Van Hove singularities. A certain class of degenerate bands can be handled within this framework. We demonstrate the use of the method, by applying it to the Haldane model.
description: 19 pages
Effects of obesity on NK cells in a mouse model of postmenopausal breast cancer
Creators: name: Spielmann, Julia
name: Roth, Laura
name: Jung, Juliane-Susanne
name: Rauße, Henrik
name: Glaß, Markus
name: Bähr, Ina
name: Quandt, Dagmar
name: Oswald, Jana
name: Kielstein, Heike
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2020
Subjects: subject: 610

description: Obesity is a widely spread disease and a crucial risk factor for malign disorders, including breast cancer of women in the postmenopause. Studies demonstrated that in case of obesity crucial natural killer (NK) cell functions like combating tumor cells are affected. This study aims to analyze NK cells and NK cell receptor expression of obese mice in a model for postmenopausal breast cancer. Therefore, female BALB/c mice were fed either a high fat or a standard diet. Thereafter, ovaries were ectomized and a syngeneic and orthotopical injection of 4T1-luc2 mouse mammary tumor cells into the mammary adipose tissue pad was performed. Obese mice showed increased body weights and visceral fat mass as well as increased levels of leptin and IL-6 in plasma. Moreover, compared to the lean littermates, tumor growth was increased and the NKp46-expression on circulating NK cells was decreased. Furthermore, the activating NK cell receptor NKG2D ligand (MULT1) expression was enhanced in adipose tissue of obese tumor bearing mice. The present study gives novel insights into gene expression of NK cell receptors in obesity and aims to promote possible links of the obesity-impaired NK cell physiology and the elevated breast cancer risk in obese women.
Using electric fields for pulse compression and group velocity control
Creators: name: Li, Qian
name: Kinos, Adam
name: Thuresson, Axel
name: Rippe, Lars
name: Kröll, Stefan
Publisher: name: arXiv
Year: 2016
Subjects: subject: Optics (physics.optics)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In this article, we experimentally demonstrate a new way of controlling the group velocity of an optical pulse by using a combination of spectral hole burning, slow light effect and linear Stark effect in a rare-earth-ion-doped crystal. The group velocity can be changed continuously by a factor of 20 without significant pulse distortion or absorption of the pulse energy. With a similar technique, an optical pulse can also be compressed in time. Theoretical simulations were developed to simulate the group velocity control and the pulse compression processes. The group velocity as well as the pulse reshaping are solely controlled by external voltages which makes it promising in quantum information and quantum communication processes. It is also proposed that the group velocity can be changed even more in an Er doped crystal while at the same time having a transmission band matching the telecommunication wavelength.
description: 8 pages, 7 figures
ANAIS DO I CONGRESSO ONLINE INTERNACIONAL DE EDUCAÇÃO
Creators: name: De Freitas Do Carmo, Carolina
name: De Andrade Ribeiro, Raphael
name: Rangel, Fernanda
Publisher: name: Zenodo
Year: 2020
Subjects: Educação - Eventos
Educação - Congressos
Educação - Resumos - Brasil

description: O I CONIED foi um Evento gratuito de caráter técnico-científico independente, não possuindo vínculo formal com qualquer Instituição de Ensino, direcionado aos docentes dos segmentos da Educação Básica e do Ensino Superior, profissionais da Educação, estudantes de todas as áreas e pais de alunos que se interessem pelos assuntos oferecidos. Conectamos diferentes pessoas de diversos lugares do Brasil e do exterior, houve muita troca de experiências, aprendizado mútuo, e consequentemente, a expansão da rede de saberes, de experiências, de ações ligadas à Educação disseminando-as na sociedade, criando assim a “Rede Colaborativa de Saberes”. O Congresso teve como objetivo disseminar o conhecimento educacional, pesquisas e experiências por meio de relatos, palestras e minicursos para sensibilizar os docentes dos segmentos da Educação Básica e do Ensino Superior para refletir e, possivelmente, reconstruir suas perspectivas sobre a Educação, de forma a valorizá-la e entender como a sociedade clama por práticas que tornem os discentes cada vez mais cidadãos.
Spatial accessibility of general inpatient care in Germany : an analysis of surgery, internal medicine and neurology
Creators: name: Bauer, Jan
name: Klingelhöfer, Doris
name: Maier, Werner Albert
name: Schwettmann, Lars
name: Groneberg, Jan David Alexander
Publisher: name: Universitäts- und Landesbibliothek Sachsen-Anhalt
Year: 2020
Subjects: subject: 610

description: Improving spatial accessibility to hospitals is a major task for health care systems which can be facilitated using recent methodological improvements of spatial accessibility measures. We used the integrated floating catchment area (iFCA) method to analyze spatial accessibility of general inpatient care (internal medicine, surgery and neurology) on national level in Germany determining an accessibility index (AI) by integrating distances, hospital beds and morbidity data. The analysis of 358 million distances between hospitals and population locations revealed clusters of lower accessibility indices in areas in north east Germany. There was a correlation of urbanity and accessibility up to r = 0.31 (p < 0.001). Furthermore, 10% of the population lived in areas with significant clusters of low spatial accessibility for internal medicine and surgery (neurology: 20%). The analysis revealed the highest accessibility for heart failure (AI = 7.33) and the lowest accessibility for stroke (AI = 0.69). The method applied proofed to reveal important aspects of spatial accessibility i.e. geographic variations that need to be addressed. However, for the majority of the German population, accessibility of general inpatient care was either high or at least not significantly low, which suggests rather adequate allocation of hospital resources for most parts of Germany.
Examining the interaction between the physical environment and person factors in the development of flow: cultivating consumer’s relationship in mobile applications over time
Creators: name: Valinatajbahnamiri, Mona
Publisher: name: Macquarie University
Year: 2022
Subjects: Other education not elsewhere classified

description: The development in technology and increased adoption of broadband services have resulted in more consumer interactions with computers and mobile devices (McLean et al., 2020). Advances in technology, especially mobile phones and mobile applications (apps), now provide a platform for improving consumer experiences (McLean et al., 2018). One factor with the potential to explain the extent and intensity of consumer experience is flow (Hoffman and Novak, 1996). Flow is defined as a highly enjoyable state in which individuals experience total involvement in a task that nothing else seems to matter (Csikszentmihalyi, 1975). Flow has received considerable attention among marketing researchers because experiencing flow in computer-mediated environments (CMEs) is associated with positive outcomes for firms such as customer retention and continuance use, customer loyalty, and customer purchase intentions, as well as for consumers such as enjoyment, creativity, improved mood, and subjective wellbeing. The literature review shows that a plethora of studies has focused on exploring flow in online desktop environments, however, there has been much less attention given to examining flow in mobile contexts. The study and use of flow in the context of mobile services are complex because of the different nature of mobile environments compared to desktop environments (Hoffman and Novak, 2009). For example, mobile devices are used on-the-go, have smaller screen sizes than a computer, have inconvenient input/output methods, and have frequent service interruptions (McLean et al., 2020). These factors may affect consumer experience, thus give impetus to the necessity to deliver a compelling experience to consumers. However, research investigating these issues is limited, and therefore, investigating the role of flow and customer experience in mobile environments is warranted. To enhance understanding the role of flow and customer experience in mobile environments, apps are considered as the context of this thesis and data were collected from users of apps in Iran.
A deformed IR: a new IR fixed point for four-dimensional holographic theories
Creators: name: Horowitz, Gary T.
name: Kolanowski, Maciej
name: Santos, Jorge E.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: In holography, the IR behavior of a quantum system at nonzero density is described by the near horizon geometry of an extremal charged black hole. It is commonly believed that for systems on $S^3$, this near horizon geometry is $AdS_2\times S^3 $. We show that this is not the case: generic static, nonspherical perturbations of $AdS_2\times S^3 $ blow up at the horizon, showing that it is not a stable IR fixed point. We then construct a new near horizon geometry which is invariant under only $SO(3)$ (and not $SO(4)$) symmetry and show that it is stable to $SO(3)$-preserving perturbations (but not in general). We also show that an open set of nonextremal, $SO(3)$-invariant charged black holes develop this new near horizon geometry in the limit $T \to 0$. Our new IR geometry still has $AdS_2$ symmetry, but it is warped over a deformed sphere. We also construct many other near horizon geometries, including some with no rotational symmetries, but expect them all to be unstable IR fixed points.
description: 44 pages, 13 figures