cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Machine Learning-based estimation and explainable artificial intelligence-supported interpretation of the critical temperature from magnetic ab initio Heusler alloys data
Creators: name: Hilgers, Robin
name: Wortmann, Daniel
name: Blügel, Stefan
Publisher: name: Forschungzentrum Jülich
Year: 2023

description: Machine Learning (ML) has impacted numerous areas of materials science, most prominently improving molecular simulations, where force fields were trained on previously relaxed structures. One natural next step is to predict material properties beyond structure. In this work, we investigate the applicability and explainability of ML methods in the use case of estimating the critical temperature for magnetic Heusler alloys calculated using ab initio methods determined materials-specific magnetic interactions and a subsequent Monte Carlo (MC) approach. We compare the performance of regression and classification models to predict the range of the critical temperature of given compounds without performing the MC calculations. Since the MC calculation requires computational resources in the same order of magnitude as the density-functional theory (DFT) calculation, it would be advantageous to replace either step with a less computationally intensive method such as ML. We discuss the necessity to generate the magnetic ab initio results to make a quantitative prediction of the critical temperature. We used state-of-the-art explainable artificial intelligence (XAI) methods to extract physical relations and deepen our understanding of patterns learned by our models from the examined data.
Exclusive production of lepton, quark and meson pairs in peripheral ultrarelativistic heavy ion collisions
Creators: name: Szczurek, Antoni
Publisher: name: arXiv
Year: 2011
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We discuss exclusive production of lepton-antilepton, quark-antiquark, $ππ$ and $ρ^0 ρ^0$ pairs in ultraperipheral, ultrarelativistic heavy-ion collisions. The cross sections for exclusive production of pairs of particles is calculated in Equivalent Photon Approximation (EPA). Realistic (Fourier transform of charge density) charge form factors of nuclei are used and the corresponding results are compared with the cross sections calculated with monopole form factor used in the literature. Absorption effects are discussed and quantified. The cross sections obtained with realistic form factors are significantly smaller than those obtained with the monopole form factors.
description: 9 pages, 13 figures an invited talk at the international conference "Hadron Structure 2011", Slovakia, June 2011
On the structures of new scalar resonances $T_{cs0}^{a}(2900)^{++}$ and $T_{cs0}^{a}(2900)^{0}$
Creators: name: Agaev, S. S.
name: Azizi, K.
name: Sundu, H.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: We investigate properties of the new scalar resonances $ T_{cs0}^{a}(2900)^{++}$ and $T_{cs0}^{a}(2900)^{0}$, which were recently reported by the LHCb collaboration. These states were observed as resonant structures in $D_{s}^{+}π^{+}$ and $D_{s}^{+}π^{-}$ invariant mass distributions in $B^{+}$ meson decays. We argue that $T_{cs0}^{a}(2900)^{++} $ and $T_{cs0}^{a}(2900)^{0}$ may be modeled as molecules $\mathcal{M} ^{++}=D_{s}^{\ast+}ρ^{+}$ and $\mathcal{M}^{0}=D_{s}^{\ast+}ρ^{-} $ of conventional vector mesons, respectively. The mass $m$ and current coupling $ f $ of the molecule $\mathcal{M}^{++}$ are calculated using two-point sum rule method. The sum rule analysis is performed by taking into account vacuum condensates up to dimension $8$. The obtained result for the mass, $ m=(2917 \pm 135)~\mathrm{MeV}$, permits us to consider the molecule $ \mathcal{M}^{++}$ as one of possible models of the resonance $ T_{cs0}^{a}(2900)^{++}$. Because the second structure $T_{cs0}^{a}(2900)^{0}$ is isospin partner of the doubly charged state, it should have the mass close to $m$.
description: 7 Pages and 3 Figures
Testing with Python - An Introduction and Getting Started
Creators: name: Fritz, Jakob
Publisher: name: Forschungzentrum Jülich
Year: 2023
Subjects: Testing
Python
Continuous Integration

description: HiRSE Seminar Series - Summer of Testing, Germany, 14 Aug 2023; doi:10.5281/ZENODO.8227886
description: This is Episode 2c of the special series 'HiRSE Summer of Testing' and is given by Jakob M. Fritz, titled 'Testing with Python'. The video accompanying these slides can be found on the YouTube channel of the HiRSE Seminar Series.The tutorial deals with how to get started with testing source code in Python.The video can be found here: https://www.youtube.com/watch?v=nxfJn94c1usThe used code can be found in the Gitlab-Repository JuGit: https://jugit.fz-juelich.de/rg-rse/testing-with-python. The slides can also be found on Zenodo: https://zenodo.org/record/8227886
A hermeneutic exploration of the self-understanding of the racialized other in Canadian society
Creators: name: Theron, Gabriel
Publisher: name: University of Calgary
Year: 2002
Subjects: subject: AC1 .T484 2002 T445
subject: Race awareness - Canada
subject: Whites - Canada - Race identity
subject: Hermeneutics
subject: Canada - Race relations

description: Bibliography: p. 274-297
Oceanographic data collected in the Straits of Florida at 27°N during the year 2014, including the estimated Florida Current transport.
Creators: name: Garcia, Rigoberto F.
name: Meinen, Christopher S.
name: Smith, Ryan Hunter
Publisher: name: U.S. Department of Commerce, National Oceanic and Atmospheric Administration, Oceanic and Atmospheric Research Laboratories, Atlantic Oceanographic and Meteorological Laboratory.
Year: 2016
Subjects: subject: Oceanography--Florida, Straits of--Observations.

description: This report summarizes the Florida Current data collected along 27°N during calendar year 2014 as part of the NOAA-funded Western Boundary Time Series project. This includes the daily Florida Current volume transport values estimated from one-minute voltage data on an out-of- service telephone cable, as well as observations collected on cruises on R/V Walton Smith (i.e. full-water-column conductivity-temperature-depth, CTD, and lowered acoustic Doppler current profiler, LADCP, profiles). The report also includes shipboard (i.e. hull-mounted) ADCP data collected on the R/V Walton Smith, and dropsonde and expendable bathythermograph (XBT) data collected on small boat cruises. The data presented herein are in final processed and quality controlled form. The report also documents where the electronic files for these data can be obtained.
Live Iterative Ptychography
Creators: name: Weber, Dieter
name: Ehrig, Simeon
name: Schropp, Andreas
name: Clausen, Alexander
name: Achilles, Silvio
name: Hoffmann, Nico
name: Bussmann, Michael
name: Dunin-Borkowski, Rafal
name: Schroer, Christian G.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Optics (physics.optics)
subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: We demonstrate live-updating ptychographic reconstruction with ePIE, an iterative ptychography method, during ongoing data acquisition. The reconstruction starts with a small subset of the total data, and as the acquisition proceeds the data used for reconstruction is extended. This creates a live-updating view of object and illumination that allows monitoring the ongoing experiment and adjusting parameters with quick turn-around. This is particularly advantageous for long-running acquisitions. We show that such a gradual reconstruction yields interpretable results already with a small subset of the data. We show simulated live processing with various scan patterns, parallelized reconstruction, and real-world live processing at the hard X-ray ptychographic nanoanalytical microscope PtyNAMi at the PETRA III beamline.
Statistical Analysis of the Radial Evolution of the Solar Winds between 0.1 and 1 au, and their Semi-empirical Iso-poly Fluid Modeling
Creators: name: Dakeyo
name: Maksimovic
name: Démoulin
name: Halekas
name: Stevens
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Statistical classification of the Helios solar wind observations into several populations sorted by bulk speed has revealed an outward acceleration of the wind. The faster the wind is, the smaller is this acceleration in the 0.3 - 1 au radial range (Maksimovic et al. 2020). In this article we show that recent measurements from the Parker Solar Probe (PSP) are compatible with an extension closer to the Sun of the latter Helios classification. For instance the well established bulk speed/proton temperature (u,Tp) correlation and bulk speed/electron temperature (u,Te) anti-correlation, together with the acceleration of the slowest winds, are verified in PSP data. We also model the combined PSP and Helios data, using empirical Parker-like models for which the solar wind undergoes an "iso-poly" expansion: isothermal in the corona, then polytropic at distances larger than the sonic point radius. The polytropic indices are derived from the observed temperature and density gradients. Our modelling reveals that the electron thermal pressure has a major contribution in the acceleration process of slow and intermediate winds (in the range of 300-500 km/s at 1 au), over a broad range of distances and that the global (electron and protons) thermal energy, alone, is able to explain the acceleration profiles. Moreover, we show that the very slow solar wind requires in addition to the observed pressure gradients, another source of acceleration.
description: 14 pages, 7 figures
Wrap Groups of Non-Archimedean Fiber Bundles
Creators: name: Ludkovsky, S. V.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Group Theory (math.GR)
subject: Rings and Algebras (math.RA)
subject: FOS: Mathematics
subject: 22E20, 46S10, 54H15, 57S20

description: Fiber bundles over infinite fields with non-trivial ultra-norms are considered. For them geometric wrap groups are defined and investigated. Besides fields also Cayley-Dickson algebras over fields of characteristic not equal to two are taken into account. For fibers over them wrap groups are introduced and their structure is investigated. Different classes of smoothness for wrap groups are used. It is demonstrated that generally such groups are infinite dimensional over the corresponding field and totally disconnected groups. That is, they are continuous or differentiable non-archimedean differentiable uniform spaces and the composition $(f,g)\mapsto f^{-1}g$ is continuous or differentiable depending on a class of smoothness of groups. Skew products of wrap groups are studied as well.
description: 49 pages
THE FIRST RECORD OF CAMBRIAN CONODONTS FROM THE HUQF-HAUSHI OUTCROPS, OMAN, ARABIAN PENINSULA
Creators: name: BAGNOLI, GABRIELLA
name: MACHADO, GIL
name: MARJIBI, SALMEEN
Publisher: name: Università degli Studi di Milano
Year: 2016
Subjects: Cambrian; Conodonts; Palynology; Biostratigraphy; Sultanate of Oman; Arabian Peninsula.

description: Outcrops of Cambrian sediments of the uppermost Miqrat Formation, the Al Bashair Formation and the basal Barik Formation were sampled for conodont and palynomorph studies. The units are part of the Palaeozoic Haima Supergroup, exposed in the Huqf-Haushi area in central eastern Oman, Arabian Peninsula. Palynomorphs were absent but conodont samples yielded a small conodont fauna. The presence of Muellerodus? erectus allows the recognition of the Muellerodus? erectus Zone established for North China (late Paibian – early Jiangshanian), in accordance with previous reports on the trilobite fauna from the same interval.
description: Rivista Italiana di Paleontologia e Stratigrafia (Research In Paleontology and Stratigraphy), V. 122, N. 2 (2016)
Imprints of flavor anomalies on neutrino oscillations through dark matter halo
Creators: name: Alok, Ashutosh Kumar
name: Chundawat, Neetu Raj Singh
name: Mandal, Arindam
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: In this work we study the impact of new physics, stimulated by flavor anomalies, on neutrino oscillations through dense dark matter halo. Inspired by a model where a Majorana dark matter fermion and two new scalar fields contribute to $b \to s μ^+ μ^-$ transition at the one loop level, we study the impact of neutrino-dark matter interaction on the oscillation patterns of ultra-high energy cosmic neutrinos passing through this muonphilic halo located near the center of Milky Way. We find that due to this interaction, the flavor ratios of neutrinos reaching earth would be different from that of vacuum oscillations. We also consider a $Z'$ model driven by $L_μ-L_τ$ symmetry and containing a vector-like fermion as a dark matter candidate. It was previously shown that for such a model, the three flavors of neutrinos decouple from each other. This will render a flavor ratio similar to that of vacuum oscillations. Therefore, the interaction of neutrinos with dense dark matter halo can serve as an important tool to discriminate between flavor models with a dark connection.
description: 11 pages, 3 figures; Similar to the published version
A machine-learning-based tool for last closed-flux surface reconstruction on tokamaks
Creators: name: Wan, Chenguang
name: Yu, Zhi
name: Pau, Alessandro
name: Liu, Xiaojuan
name: Li, Jiangang
Publisher: name: arXiv
Year: 2022
Subjects: subject: Plasma Physics (physics.plasm-ph)
subject: Machine Learning (cs.LG)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Nuclear fusion represents one of the best alternatives for a sustainable source of clean energy. Tokamaks allow to confine fusion plasma with magnetic fields and one of the main challenges in the control of the magnetic configuration is the prediction/reconstruction of the Last Closed-Flux Surface (LCFS). The evolution in time of the LCFS is determined by the interaction of the actuator coils and the internal tokamak plasma. This task requires real-time capable tools able to deal with high-dimensional data as well as with high resolution in time, where the interaction between a wide range of input actuator coils with internal plasma state responses add additional layer of complexity. In this work, we present the application of a novel state of the art machine learning model to the LCFS reconstruction in the Experimental Advanced Superconducting Tokamak (EAST) that learns automatically from the experimental data of EAST. This architecture allows not only offline simulation and testing of a particular control strategy, but can also be embedded in the real-time control system for online magnetic equilibrium reconstruction and prediction. In the real-time modeling test, our approach achieves very high accuracies, with over 99% average similarity in LCFS reconstruction of the entire discharge process.
Vector-axial vector correlators in weak electric field and the holographic dynamics of the chiral condensate
Creators: name: Iatrakis, Ioannis
name: Kiritsis, Elias
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The transverse part of the vector-axial vector flavor current correlator in the presence of weak external electric field is studied using holography. The correlator is calculated using a bottom-up model arxiv:1003.2377 {proposed recently}, that includes the non-linear dynamics of the chiral condensate. It is shown that for low momenta the result agrees with the relation proposed by arXiv:1010.0718 {Son and Yamamoto} motivated by a simpler holographic model. For large Euclidean momenta however, the two results diverge. In the process, the difference of the vector and axial vector two point functions is also calculated. At large Euclidean momenta it is found that the first non-perturbative contribution, decreases as $q^{-6}$ as expected from QCD.
description: 17 pages, 5 figures, typos corrected
title: Herstellung von Gießharzpräparaten für den Einsatz im Biologieunterricht
title: Production of casting resin preparations to use in biology classes
Creators: name: Zinke, Jann Felix
Publisher: name: Universität Potsdam
Year: 2023
Subjects: subject: 570 Biowissenschaften; Biologie

description: Das Ziel des hier beschriebenen Masterprojekts war es, eine Methode zu etablieren, mit der Insekten in Gießharz eingeschlossen werden können, damit sie dauerhaft konserviert für mikroskopische Untersuchungen im Biologieunterricht zur Verfügung stehen. Die Masterarbeit enthält eine ausführliche Anleitung zur Herstellung von Gießharzpräparaten mit darin eingebetteten Insekten. Sie soll als Handreichung vor allem für Biologie-Lehrkräfte dienen, um selbstständig hochwertige Lehrpräparate für ihren Unterricht herstellen zu können. Aufgrund der Komplexität des Themas werden Naturschutzbestimmungen und die Beschaffung der Insekten genauso beleuchtet wie deren anschließende Präparation, die Konstruktion einer eigenen Gießform, die Einbettung der Insekten in Gießharz und die Nachbehandlung des Gießlings. Wichtige Einflussfaktoren, die die Qualität der Präparate entscheidend beeinflussen und mögliche Fehlerquellen, werden ausführlich erläutert. Mittels dieser detaillierten Eingießanleitung können mit relativ einfachen und kostengünstigen Mitteln faszinierende Studienobjekte für einen anschaulichen Biologieunterricht entstehen.
description: This master thesis aims at the establishment of a method in order to embed insects into cast resin, so that the insects are permanently preserved and available for microscopic studies in biology classes. This master thesis contains a detailed guide to produce cast resin preparations with embedded insects. It is primarily intended to serve as a guide to enable teachers in order to independently create high-quality teaching materials for their classes. Due to the complexity of the topic, environmental protection regulations and the procurement of insects are examined as well as their subsequent preparations, the construction of own casting moulds, the embedding of the insects into the casting resin and the post-treatment of the casting. Important factors which have a decisive influence on quality of the preparations and possible sources of error are particularly described. These detailed casting instructions open new possibilities for teachers to create fascinating teaching objects for vivid biology classes using relatively simple and inexpensive means.
Simulating viscous incompressible fluids with embedded boundary finite difference methods
Creators: name: Batty, Christopher
Publisher: name: University of British Columbia
Year: 2010

description: The behaviour of liquids and gases ranks among the most familiar and yet complex physical phenomena commonly encountered in daily life. To create a seamless approximation of the real world, it is clear that we must be able to accurately simulate fluids. However, a crucial element of what makes fluid behaviour so complex and compelling is its interactions with its surroundings. To simulate the motion of a fluid we cannot consider the Navier-Stokes equations in isolation; we must also examine the boundary conditions at the point where the fluid meets the world. Enforcing these boundary conditions has traditionally been a source of tremendous difficulty. Cartesian grid-based methods typically approximate the world in an unrealistic, axis-aligned block representation, while conforming mesh methods frequently suffer from poor mesh quality and expensive mesh generation. This thesis examines the use of embedded boundary finite difference methods to alleviate these shortcomings by providing a degree of sub-grid information that enables more efficient, flexible, accurate, and realistic simulations. The first key contribution of the thesis is the use of a variational approach to derive novel embedded boundary finite difference methods for fluids, by exploiting the concept of natural boundary conditions. This idea is applied first to animate the interaction between incompressible fluids and irregularly shaped dynamic rigid bodies. I then apply a similar technique to properly handle viscous free surfaces, enabling realistic buckling and coiling in viscous flows. Lastly, I unify these ideas to simulate Stokes flows in the presence of both free surface and solid boundaries, and demonstrate the method's convergence on a range of examples. The second main contribution is a study of embedded boundary methods for pressure projection in the context of unstructured Delaunay and Voronoi meshes. By eliminating the need for boundary-conforming meshes, this work enables efficient high-quality adaptive mesh generation and improves simulation accuracy. Furthermore, it demonstrates that by placing simulation samples at Voronoi sites, and choosing these sites intelligently with respect to liquid geometry, one can eliminate surface noise, improve the realism and stability of surface tension, and plausibly simulate nearly arbitrarily thin sheets and droplets.
Local controllability of quantum systems
Creators: name: Puchała, Zbigniew
Publisher: name: arXiv
Year: 2012
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: We give a criterion that is sufficient for controllability of multipartite quantum systems. We generalize the graph infection criterion to the quantum systems that cannot be described with the use of a graph theory. We introduce the notation of hypergraphs and reformulate the infection property in this setting. The introduced criterion has a topological nature and therefore it is not connected to any particular experimental realization of quantum information processing.
description: 9 pages, 1 figure
Testen Wir Relevantes Wissen? – Zusammenhang Zwischen Dem Professionswissen Von Physiklehrkräften Und Gutem Und Erfolgreichem Unterrichten
Creators: name: Cauet, Eva
Publisher: name: Zenodo
Year: 2016
Subjects: Physik
Professionswissen
Lehrerausbildung
Lehrkräfte
Pädagogik
Lehre

description: Das Professionswissen von Lehrkräen wird als wichtige Voraussetzung für gutes und erfolgreiches Unterrichten diskutiert. Professionswissenstests werden daher o mit dem Ziel eingesetzt, Aussagen über die Wirksamkeit der Lehrerausbildung zu treffen. Die Handlungsrelevanz explizierbaren Wissens ist allerdings nicht empirisch abgesichert,was die Validität solcher Aussagen einschränkt.

Ziel der hier vorgestellten Studie war die Überprüfung der prädiktiven Validität der im Projekt „ProwiN“ entwickelten Tests zur Erfassung des Fachwissens sowie des fachdidaktischen und pädagogischen Wissens von Physiklehrkräen in Bezug auf gutes und erfolgreiches Unterrichten. Hierfür wurden Zusammenhänge zwischen demProfessionswissen von 23 Lehrkräen, der kognitiv aktivierenden Gestaltung ihres Unterrichts und dem

Fachwissenserwerb und situationalen Interesse ihrer Schülerinnen und Schüler analysiert.

Die Ergebnisse deuten darauf hin, dass auf Basis der üblichen Validierungsmaßnahmen für Professionswissenstests (Expertenbefragungen, Vergleich bekannter Gruppen, Zusammenhangsanalysen zwischen Professionswissensdimensionen), nicht davon ausgegangen werden kann, dass handlungsrelevantes Wissen für gutes und erfolgreiches Unterrichten erfasst wird. Eine intensive Auseinandersetzung mit den Einschränkungen der vorgestellten Studie macht deutlich, wie wichtig – aber auch wie problematisch – die Untersuchung der Zusammenhänge zwischen Professionswissen, Unterrichtsqualität und Unterrichtserfolg ist.
Spontaneous stochasticity and renormalization group in discrete multi-scale dynamics
Creators: name: Mailybaev, Alexei A.
name: Raibekas, Artem
Publisher: name: arXiv
Year: 2022
Subjects: subject: Mathematical Physics (math-ph)
subject: Dynamical Systems (math.DS)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences
subject: FOS: Mathematics

description: We introduce a class of multi-scale systems with discrete time, motivated by the problem of inviscid limit in fluid dynamics in the presence of small-scale noise. These systems are infinite-dimensional and defined on a scale-invariant space-time lattice. We propose a qualitative theory describing the vanishing regularization (inviscid) limit as an attractor of the renormalization group operator acting in the space of flow maps or respective probability kernels. If the attractor is a nontrivial probability kernel, we say that the inviscid limit is spontaneously stochastic: it defines a stochastic (Markov) process solving deterministic equations with deterministic initial and boundary conditions. The results are illustrated with solvable models: symbolic systems leading to digital turbulence and systems of expanding interacting phases.
description: 34 pages, 10 figures
3-D modelling of the collimated bipolar outflows of compact planetary nebulae with WR-type central stars
Creators: name: Akras, S.
name: López, J. A.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We present high-resolution, long-slit spectroscopic observations of five compact ($\leq$ 10 arcsec) planetary nebulae located close to the galactic bulge region and for which no high spatial resolution images are available. The data have been drawn from the San Pedro Mártir kinematic catalogue of galactic planetary nebulae (López et al. 2012). The central star in four of these objects (M 1-32, M 2-20, M 2-31 and M 3-15) is of WR-type and the fifth object (M 2-42) has a wels type nucleus. These observations reveal the presence in all of them of a dense and thick equatorial torus-like component and high-speed, collimated, bipolar outflows. The code SHAPE is used to investigate the main morpho-kinematic characteristics and reproduce the 3-D structure of these objects assuming a cylindrical velocity field for the bipolar outflows and a homologous expansion law for the torus/ring component. The deprojected expansion velocities of the bipolar outflows are found to be in the range of 65 to 200 km $\rm{s^{-1}}$, whereas the torus/ring component shows much slower expansion velocities, in the range of 15 to 25 km $\rm{s^{-1}}$. It is found that these planetary nebulae have very similar structural components and the differences in their emission line spectra derive mostly from their different projections on the sky. The relation of their morpho-kinematic characteristics with the WR-type nuclei deserves further investigation.
description: 12 pages, 3 figures, 1 table
Financial Management Practice of church: The case of the Ethiopian Evangelical Church Mekane Yesus
Creators: name: Gemechis Matewos
Publisher: name: Zenodo
Year: 2018

description: Financial management practices in the faith based areas at large and in the churches specifically is not the recent development. Despite its age, the financial management practice has been challenged in the church because of two main reasons; the first is the source of income arise from volunteers, there is a thought not to monitor the resources with adequate professionals since it is seemed to be holy and the second is the sacred and secular divide the church in which separates the financial management to the secular one and seen as it is a profane. The existence of the aforementioned challenges on one hand and the ever growing resources of the Ethiopian Evangelical Church Mekane Yesus (EECMY) on the other hand are the two paradoxes. The study assessed the financial management practice of the EECMY for administering its financial resources within its structure. Population of the study consists of the 28 church units (synods) and 7 joint programs of the church, total of 35. The study was conducted based on purposively selected 15 church units and 5 joint programs. Non-probability sampling of purposive sampling method was used to draw samples from the population. Questionnaire was distributed to 25 leaders and 25 finance heads and chief accountants of the sampled units; interview was conducted with two higher officials of the church; secondary data such as consolidated financial statements, financial manual, and constitution of the church were used for analysis. The elements of financial management such as accounting records, financial planning, financial policy and organizational philosophy, financial reporting and monitoring and internal control activities were assessed in order to study financial management practice of the EECMY.
Measuring dark matter spikes around primordial black holes with Einstein Telescope and Cosmic Explorer
Creators: name: Cole, Philippa S.
name: Coogan, Adam
name: Kavanagh, Bradley J.
name: Bertone, Gianfranco
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Future ground-based gravitational wave observatories will be ideal probes of the environments surrounding black holes with masses $1 - 10\,\mathrm{M_\odot}$. Binary black hole mergers with mass ratios of order $q=m_2/m_1\lesssim10^{-3}$ can remain in the frequency band of such detectors for months or years, enabling precision searches for modifications of their gravitational waveforms with respect to vacuum inspirals. As a concrete example of an environmental effect, we consider here a population of binary primordial black holes which are expected to be embedded in dense cold dark matter spikes. We provide a viable formation scenario for these systems compatible with all observational constraints, and predict upper and lower limits on the merger rates of small mass ratio pairs. Given a detected signal of one such system by either Einstein Telescope or Cosmic Explorer, we show that the properties of the binary and of the dark matter spike can be measured to excellent precision with one week's worth of data, if the effect of the dark matter spike on the waveform is taken into account. However, we show that there is a risk of biased parameter inference or missing the events entirely if the effect of the predicted dark matter overdensity around these objects is not properly accounted for.
description: 14 pages plus appendices, 15 figures
A collaborative planning support system for a multi-touch tabletop : the effect of number of touch inputs on collaboration and output quality
Creators: name: Fernquist, Jennifer Ellen
Publisher: name: University of British Columbia
Year: 2010

description: This thesis describes the design and evaluation of a collaborative urban planning support system for an interactive multi-touch tabletop display. The system facilitates the design of spatial patterns of proposed development in a co-located collaborative manner. We worked closely with faculty in the School of Architecture and Landscape Architecture at the University of British Columbia and employed an iterative, user-centered development process to create a tabletop system to support landscape architect's primary urban planning steps. The prototype system is designed for use by urban planners, stakeholders, or private citizens: users with a variety of backgrounds and expertise. The collaborative urban planning support system was designed for use on a multi-touch tabletop following lessons learned about considerations for planning support systems, tabletop applications, and encouraging collaboration. The system contains a limited yet adequate set of functions for arranging various building types on a development site map. It has an intuitive and highly interactive interface and uses input data that comes directly from the elementsLAB team. A primary focus of the pattern creation application is ensuring equity of collaboration among users. Urban planners believe that it is important that all members of a group contribute equally to produce a neighbourhood that meets predefined quantitative and qualitative targets. We conducted a controlled experiment that investigated how varying the number of simultaneous touch inputs in the application affects collaboration and output quality. We tested hypotheses that users would (i) collaborate more, (ii) produce higher quality output, and (iii) complete their task faster with a multi-touch application than with a single-touch application. We also tested the hypothesis that (iv) multi-touch interactions with application elements will be preferred over traditional single-touch interactions. The number of touches accepted did not affect the amount of collaboration, output quality, or time. However, participants perceived the multi-touch tasks to be faster and to produce neighbourhood patterns of higher quality. Participants seemed to be more cognitively absorbed in the multi-touch tasks and they significantly preferred the multi-touch application over the single-touch application. In addition, all multi-touch interactions were significantly preferred over single-touch interactions.
Joint HST, VLT/MUSE and XMM-Newton observations to constrain the mass distribution of the two strong lensing galaxy clusters: MACS J0242.5-2132 & MACS J0949.8+1708
Creators: name: Allingham, Joseph F. V.
name: Jauzac, Mathilde
name: Lagattuta, David J.
name: Mahler, Guillaume
name: Bœhm, Céline
name: Lewis, Geraint F.
name: Eckert, Dominique
name: Edge, Alastair
name: Ettori, Stefano
Publisher: name: arXiv
Year: 2022
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present the strong lensing analysis of two galaxy clusters: MACS J0242.5-2132 (MACS J0242, $z=0.313$) and MACS J0949.8+1708 (MACS J0949, $z=0.383$). Their total matter distributions are constrained thanks to the powerful combination of observations with the Hubble Space Telescope and the MUSE instrument. Using these observations, we precisely measure the redshift of six multiple image systems in MACS J0242, and two in MACS J0949. We also include four multiple image systems in the latter cluster identified in HST imaging without MUSE redshift measurements. For each cluster, our best-fit mass model consists of a single cluster-scale halo, and 57 (170) galaxy-scale halos for MACS J0242 (MACS J0949). Multiple images positions are predicted with a $rms$ 0.39 arcsec and 0.15 arcsec for MACS J0242 and MACS J0949 models respectively. From these mass models, we derive aperture masses of $M(R<$200 kpc$) = 1.67_{-0.05}^{+0.03}\times 10^{14} M_{\odot}$, and $M(R<$200 kpc$) = 2.00_{-0.20}^{+0.05}\times 10^{14} M_{\odot}$. Combining our analysis with X-ray observations from the XMM-Newton Observatory, we show that MACS J0242 appears to be a relatively relaxed cluster, while conversely, MACS J0949 shows a relaxing post-merger state. At 200 kpc, X-ray observations suggest the hot gas fraction to be respectively $f_g = 0.115^{+0.003}_{-0.004}$ and $0.053^{+0.007}_{-0.006}$ for MACS J0242 and MACS J0949. MACS J0242 being relaxed, its density profile is very well fitted by a NFW distribution, in agreement with X-ray observations. Finally, the strong lensing analysis of MACS J0949 suggests a flat dark matter density distribution in the core, between 10 and 100 kpc. This appears consistent with X-ray observations.
description: 20 pages, 11 figures, published in MNRAS
title: Atomistic hybrid particle‐field molecular dynamics combined with slip‐springs: Restoring entangled dynamics to simulations of polymer melts
Creators: name: Wu, Zhenghao
name: Kalogirou, Andreas
name: De Nicola, Antonio
name: Milano, Giuseppe
name: Müller‐Plathe, Florian
Publisher: name: Wiley
Year: 2023

description: In hybrid particle‐field (hPF) simulations (J. Chem. Phys., 2009 130, 214106), the entangled dynamics of polymer melts is lost due to chain crossability. Chains cross, because the field‐treatment of the nonbonded interactions makes them effectively soft‐core. We introduce a multi‐chain slip‐spring model (J. Chem. Phys., 2013 138, 104907) into the hPF scheme to mimic the topological constraints of entanglements. The structure of the polymer chains is consistent with that of regular molecular dynamics simulations and is not affected by the introduction of slip‐springs. Although slight deviations are seen at short times, dynamical properties such as mean‐square displacements and reorientational relaxation times are in good agreement with traditional molecular dynamics simulations and theoretical predictions at long times.
Stella Meets Rave: Calibrating Low-Resolution Ca Ii Irt Fluxes
Creators: name: Järvinen, Silva P.
name: Kordopatis, Georges
name: Strassmeier, Klaus G.
name: Steinmetz, Matthias
Publisher: name: Zenodo
Year: 2016
Subjects: cool
stars

description: Within the RAVE (the Radial Velocity Experument) survey in total 574,630 low-resolution spectra of 483,330 stars covering the Ca II IRT has been obtained. With our selection criteria, out of those stars about 10% are late-type dwarfs. We have selected these dwarfs from the database, converted the measured 1-Å core equivalent widths into the fluxes, and obtained follow up high-resolution spectra of selected targets as well as spectra of MK standard stars using SES (STELLA échelle spectrograph) at STELLA (STELLar Activity) telescope. With a single exposure, we cover all wavelengths from Ca H&K to IRT and can therefore relate IRT fluxes with those of other activity indicators, such as Hα. Furthermore, we can place these fluxes in relation to observable astrophysical parameters, such as global metallicity and temperature.
description: Poster #179
description: {"references": ["Kordopatis, G., Gilmore, G., Steinmetz, M., et al. 2013, AJ, 146, 134", "\u017derjal, M., Zwitter, T., Matijevi\u010d, G.,  et al. 2013, ApJ, 776, 127", "Hall, J.C. 1996, PASP, 108, 313", "Flower, P.J. 1996, ApJ, 469, 355"]}
Struggle in Fetters: Electoral System and Elderly Poverty
Creators: name: Tian, Tao
Publisher: name: figshare
Year: 2020
Subjects: subject: 160603 Comparative Government and Politics
subject: FOS: Political science

description: Do proportional representative systems likely have lower elderly poverty rates than the majoritarian government? Conventional wisdom may suggest that parties in proportional representation systems tend to suffer smaller electoral pressure from their constituencies so that they are more likely to introduce more generous social security. Meanwhile, many studies have indicated the strong negative correlation between social securities and the elderly poverty rate (Jacques, Leroux, & Stevanovic, 2018; Myles, 2000; Smeeding & Sandstrom, 2005). In this sense, electoral systems seemingly affect the elderly poverty rate via influencing generosity of social security. However, very few researches have systematically tested their relationship. Thus, this article functions as an extension of the scholarship for the effect of electoral systems, trying to bridge the theoretical gap between electoral systems and the elderly poverty rate.
Group Analysis of the Novikov Equation
Creators: name: Bozhkov, Yuri
name: Freire, Igor Leite
name: Ibragimov, Nail H.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: We find the Lie point symmetries of the Novikov equation and demonstrate that it is strictly self-adjoint. Using the self-adjointness and the recent technique for constructing conserved vectors associated with symmetries of differential equations, we find the conservation law corresponding to the dilations symmetry and show that other symmetries do not provide nontrivial conservation laws. Then we investigat the invariant solutions.
[CII] line emission in massive star-forming galaxies at z=4.7
Creators: name: Wagg, J.
name: Wiklind, T.
name: Carilli, C. L.
name: Espada, D.
name: Peck, A.
name: Riechers, D.
name: Walter, F.
name: Wootten, A.
name: Aravena, M.
name: Barkats, D.
name: Cortes, J. R.
name: Hills, R.
name: Hodge, J.
name: Impellizzeri, C. M V.
name: Iono, D.
name: Leroy, A.
name: Martin, S.
name: Rawlings, M. G.
name: Maiolino, R.
name: McMahon, R. G.
name: Scott, K. S.
name: Villard, E.
name: Vlahakis, C.
Publisher: name: arXiv
Year: 2012
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We present Atacama Large Millimeter/submillimeter Array (ALMA) observations of the [CII] 157.7micron fine structure line and thermal dust continuum emission from a pair of gas-rich galaxies at z=4.7, BR1202-0725. This system consists of a luminous quasar host galaxy and a bright submm galaxy (SMG), while a fainter star-forming galaxy is also spatially coincident within a 4" (25 kpc) region. All three galaxies are detected in the submm continuum, indicating FIR luminosities in excess of 10^13 Lsun for the two most luminous objects. The SMG and the quasar host galaxy are both detected in [CII] line emission with luminosities, L([CII]) = (10.0 +/- 1.5)x10^9 Lsun and L([CII]) = (6.5+/-1.0)x10^9 Lsun, respectively. We estimate a luminosity ratio, L([CII])/L(FIR) = (8.3+/-1.2)x10^-4 for the starburst SMG to the North, and L([CII])/L(FIR) = (2.5+/-0.4)x10^-4 for the quasar host galaxy, in agreement with previous high-redshift studies that suggest lower [CII]-to-FIR luminosity ratios in quasars than in starburst galaxies. The third fainter object with a flux density, S(340GHz) = 1.9+/-0.3 mJy, is coincident with a Ly-Alpha emitter and is detected in HST ACS F775W and F814W images but has no clear counterpart in the H-band. Even if this third companion does not lie at a similar redshift to BR1202-0725, the quasar and the SMG represent an overdensity of massive, infrared luminous star-forming galaxies within 1.3 Gyr of the Big Bang.
description: 14 pages, accepted for publication in ApJ Letters
EC-KitY: Evolutionary Computation Tool Kit in Python with Seamless Machine Learning Integration
Creators: name: Sipper, Moshe
name: Halperin, Tomer
name: Tzruia, Itai
name: Elyasaf, Achiya
Publisher: name: arXiv
Year: 2022
Subjects: subject: Neural and Evolutionary Computing (cs.NE)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: EC-KitY is a comprehensive Python library for doing evolutionary computation (EC), licensed under the BSD 3-Clause License, and compatible with scikit-learn. Designed with modern software engineering and machine learning integration in mind, EC-KitY can support all popular EC paradigms, including genetic algorithms, genetic programming, coevolution, evolutionary multi-objective optimization, and more. This paper provides an overview of the package, including the ease of setting up an EC experiment, the architecture, the main features, and a comparison with other libraries.
description: 6 pages, 1 figure, 1 table. Published in Elsevier SoftwareX
37 GHz methanol masers : Horsemen of the Apocalypse for the class II methanol maser phase?
Creators: name: Ellingsen, S. P.
name: Breen, S. L.
name: Sobolev, A. M.
name: Voronkov, M. A.
name: Caswell, J. L.
name: Lo, N.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We report the results of a search for class II methanol masers at 37.7, 38.3 and 38.5 GHz towards a sample of 70 high-mass star formation regions. We primarily searched towards regions known to show emission either from the 107 GHz class II methanol maser transition, or from the 6.035 GHz excited OH transition. We detected maser emission from 13 sources in the 37.7 GHz transition, eight of these being new detections. We detected maser emission from three sources in the 38 GHz transitions, one of which is a new detection. We find that 37.7 GHz methanol masers are only associated with the most luminous 6.7 and 12.2 GHz methanol maser sources, which in turn are hypothesised to be the oldest class II methanol sources. We suggest that the 37.7 GHz methanol masers are associated with a brief evolutionary phase (of 1000-4000 years) prior to the cessation of class II methanol maser activity in the associated high-mass star formation region.
description: 14 pages, 4 figures, accepted for publication in ApJ
$CP$ violation in $b \to s \ell \ell$: a model independent analysis
Creators: name: Chundawat, Neetu Raj Singh
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 perform a model-independent global fit to all germane and updated $b \to s \ell \ell$ ($\ell=e,\,μ$) data assuming new physics couplings to be complex. Under the approximation that new physics universally affects muon and electron sectors and that either one or two related operators contribute at a time, we identify scenarios which provide a good fit to the data. It turns out that the favored scenarios remain the same as obtained for the real fit. Further, the magnitude of complex couplings can be as large as that of their real counterparts and these are reflected in the predictions of the direct $CP$ asymmetry, $A_{\rm CP}$, in $B \to (K,\, K^*) μ^+ μ^-$ along with a number of angular $CP$ asymmetries, $A_i$, in $B^0 \to K^{*0} μ^+ μ^-$ decay. The sensitivities of these observables to various solutions are different in the low and high-$q^2$ bins. We also determine observables which can serve as unique identifier for a particular new physics solution. Moreover, we examine correlations between $A_{\rm CP}$ and several $A_i$ observables. A precise measurement of $A_{\rm CP}$ and $A_i$ observables can not only confirm the existence of additional weak phases but can also enable unique determination of Lorentz structure of possible new physics in $b \to s μ^+ μ^-$ transition.
description: 15 pages, 4 figures; updated results in view of December 2022 LHCb measurements
title: Comparison of Eulerian QBMM and classical Eulerian–Eulerian method for the simulation of polydisperse bubbly flows
Creators: name: Li, Dongyue
name: Marchisio, Daniele
name: Hasse, Christian
name: Lucas, Dirk
Publisher: name: Wiley-Blackwell
Year: 2023

description: The spatial gas distribution of poly‐disperse bubbly flows depends greatly on the bubble size. To reflect the resulting polycelerity, more than two momentum balance equations (typically for the gas and liquid phases) have to be considered, as done in the multifluid approach. The inhomogeneous multiple‐size group model follows this approach, also combined with a population balance model. As an alternative, in a previous work, an Eulerian quadrature‐based moments method (E‐QBMM) was implemented in OpenFOAM; however, only the drag force was included. In this work, different nondrag forces (lift, wall lubrication, and turbulent dispersion) are added to enable more complex test cases to be simulated. Simulation results obtained using E‐QBMM are compared with the classical E–E method and validated against experimental data for different test cases. The results show that there is good agreement between E‐QBMM and E–E methods for mono‐disperse cases, but E‐QBMM can better simulate the separation and segregation of small and large bubbles.
On classical de Sitter solutions in higher dimensions
Creators: name: Van Riet, Thomas
Publisher: name: arXiv
Year: 2011
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We derive necessary criteria for the existence of classical, meta-stable, de Sitter solutions in flux compactifications of type II supergravity down to dimensions higher than four. We find that the possibilities in higher dimensions are much more restricted than in four dimensions. The only models that satisfy the criteria are derived from O6 compactifications to D=5,6 and O5 compactifications to D=5 and no meta-stable solutions can exist in dimensions higher than six. All these models have in common that the compact dimensions are negatively curved.
description: 17 pages with references; few errors in equations corrected + references updated