cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Cultivation of African catfish (Clarias gariepinus Burchell, 1822) in recirculating aquaculture systems (RAS) in Northern Germany
Creators: name: Wenzel, Lisa Carolina
Publisher: name: Universität Rostock
Year: 2023
Subjects: subject: 630 Agriculture

description: Within this work, the influence of stocking densities, grading strategies to cannibals, water quality, Montmorillonite-illite/Muscovite (1g557) as a feed additive and the use of process water for aquaponic plant production on production success was investigated experimentally using African catfish (Clarias gariepinus). Furthermore, it was calculated to what extent the survival rate and growth can differ under ideal and poor production conditions and what influence this has on production success.
Boundedness of Fourier Integral Operators on $\mathcal{F} L^p$ spaces
Creators: name: Cordero, Elena
name: Nicola, Fabio
name: Rodino, Luigi
Publisher: name: arXiv
Year: 2008
Subjects: subject: Analysis of PDEs (math.AP)
subject: FOS: Mathematics
subject: 35S30, 47G30, 42C15

description: We study the action of Fourier Integral Operators (FIOs) of H{ö}rmander's type on ${\mathcal{F}} L^p({\mathbb {R}}^d_{comp}$, $1\leq p\leq\infty$. We see, from the Beurling-Helson theorem, that generally FIOs of order zero fail to be bounded on these spaces when $p\not=2$, the counterexample being given by any smooth non-linear change of variable. Here we show that FIOs of order $m=-d|1/2-1/p|$ are instead bounded. Moreover, this loss of derivatives is proved to be sharp in every dimension $d\geq1$, even for phases which are linear in the dual variables. The proofs make use of tools from time-frequency analysis such as the theory of modulation spaces.
description: 26 pages
Deligne-Beilinson cohomology and abelian links invariants
Creators: name: Guadagnini, Enore
name: Thuillier, Frank
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: For the abelian Chern-Simons field theory, we consider the quantum functional integration over the Deligne-Beilinson cohomology classes and we derive the main properties of the observables in a generic closed orientable 3-manifold. We present an explicit path-integral non-perturbative computation of the Chern-Simons links invariants in the case of the torsion-free 3-manifolds $S^3$, $S^1 \times S^2$ and $S^1 \times Σ_g$.
The First Gamma-ray Emitting BL Lacertae Object at the Cosmic Dawn
Creators: name: Paliya, Vaidehi S.
name: Domínguez, A.
name: Cabello, C.
name: Cardiel, N.
name: Gallego, J.
name: Siana, B.
name: Ajello, M.
name: Hartmann, D.
name: de Paz, A. Gil
name: Stalin, C. S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: One of the major challenges in studying the cosmic evolution of relativistic jets is the identification of the high-redshift ($z>3$) BL Lacertae objects, a class of jetted active galactic nuclei characterized by their quasi-featureless optical spectra. Here we report the identification of the first $γ$-ray emitting BL Lac object, 4FGL~J1219.0+3653 (J1219), beyond $z=3$, i.e., within the first two billion years of the age of the Universe. The optical and near-infrared spectra of J1219 taken from 10.4 m Gran Telescopio Canarias exhibit no emission lines down to an equivalent width of $\sim$3.5 A supporting its BL Lac nature. The detection of a strong Lyman-$α$ break at $\sim$5570 A, on the other hand, confirms that J2119 is indeed a high-redshift ($z\sim3.59$) quasar. Based on the prediction of a recent BL Lac evolution model, J1219 is one of the only two such objects expected to be present within the comoving volume at $z=3.5$. Future identifications of more $z>3$ $γ$-ray emitting BL Lac sources, therefore, will be crucial to verify the theories of their cosmic evolution.
description: Accepted for publication in The Astrophysical Journal Letters
Confinement and center vortex dynamics in different gauge groups
Creators: name: Engelhardt, M.
name: Sperisen, B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: The random vortex world-surface model is extended to the gauge groups SU(4) and Sp(2). Compared to the SU(2) and SU(3) models studied previously, which reproduce the infrared properties of the corresponding Yang-Mills theories on the basis of a simple vortex world-surface curvature action, new dynamical characteristics become important. In the SU(4) case, an explicit dependence of the vortex effective action on the configuration of the Abelian magnetic monopoles residing on the vortices emerges; in the Sp(2) case, a new "stickiness" contribution to the vortex action serves to drive the deconfinement phase transition towards the correct first-order behavior.
description: 4 pages, to appear in the Proceedings of the International Conference on "Quark Confinement and the Hadron Spectrum VII," September 2-7, 2006, Ponta Delgada, Azores, Portugal
title: MERN Driven:  AI proctor Examination System (Empowering Exam Security).
title: Exam Proctor System
titleType: Subtitle
Creators: name: Kumbhar, Adarsh
name: Tiwari, Ankush
name: Mutukundu, Shreeram
Publisher: name: Zenodo
Year: 2024

description: This research presents an innovative approach to online examination security through the implementation of an AI-driven proctoring system. The study explores the integration of cutting-edge technologies such as TensorFlow models, object detection, face recognition, and activity monitoring to ensure the integrity of online assessments. The proposed system leverages machine learning algorithms, specifically COCO-SSD, to identify suspicious activities, such as multiple face detection, object manipulation, tab switching, and unauthorized screenshot capture, in real-time. Additionally, it offers a seamless user experience through a robust frontend interface developed using React.js, complemented by a secure and scalable backend powered by Node.js and MongoDB.

The core of the system revolves around the AI Proctored System, which facilitates a transparent examination environment by continuously monitoring the candidate's behavior during the test. The system ensures that students are authenticated through secure JWT-based login mechanisms and undergo a comprehensive verification process before the commencement of the test. Furthermore, the system accommodates multiple test formats, such as Multiple-Choice Questions (MCQs) and coding challenges, with support for various programming languages. By requiring full-screen mode and webcam and microphone access, the system minimizes the chances of cheating, while real-time activity logging enables the teacher to monitor student behavior and activity throughout the examination. The comprehensive monitoring and analysis provided by the AI-driven proctoring system not only enhances the reliability of online testing but also lays the groundwork for more secure and efficient digital assessment environments in the future. This research contributes significantly to the field of educational technology by offering a scalable, AI-powered solution to the prevalent issues of academic dishonesty and online exam integrity.
Additional file 3 of Co-designing genomics research with a large group of donor-conceived siblings
Creators: name: Nunn, Jack S.
name: Crawshaw, Marilyn
name: Lacaze, Paul
Publisher: name: figshare
Year: 2021
Subjects: subject: Immunology
subject: FOS: Clinical medicine
subject: 69999 Biological Sciences not elsewhere classified
subject: FOS: Biological sciences
subject: Science Policy

description: Additional file 3. GRIPP2 report.
A practical method for pupil segmentation in challenging conditions
Creators: name: Khaledyan, Donya
name: Eshghi, Mohammad
name: Heidari, Morteza
name: Khuzani, Abolfazl Zargari
name: Mashhadi, Najmeh
Publisher: name: arXiv
Year: 2020
Subjects: subject: Image and Video Processing (eess.IV)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: Various methods have been proposed for authentication, including password or pattern drawing, which is clearly visible on personal electronic devices. However, these methods of authentication are more vulnerable, as passwords and cards can be forgotten, lost, or stolen. Therefore, a great curiosity has developed in individual authentication using biometric methods that are based on physical and behavioral features not possible to forget or be stolen. Authentication methods are used widely in portable devices since the lifetime of battery and time response are essential concerns in these devices. Due to the fact that these systems need to be fast and low power, designing efficient methods is still critical. We, in this paper, proposed a new low power and fast method for pupil segmentation based on approximate computing that under trading a minor level of accuracy, significant improvement in power assumption and time saving can be obtained and makes this algorithm suitable for hardware implementation. Furthermore, the experimental results of PSNR and SSIM show that the error rate in this method is negligible.
description: 5 pages, 6 figures
Laser control of ultracold molecule formation: The case of RbSr
Creators: name: Devolder, Adrien
name: Desouter-Lecomte, Michèle
name: Atabek, Osman
name: Luc-Koenig, Eliane
name: Dulieu, Olivier
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We have studied the formation of ultracold RbSr molecules with laser pulses. After discussing the advantages of the Mott insulator phase for the control with pulses, we present two classes of strategies. The first class involves two electronic states. Two extensions of stimulated Raman adiabatic passage (STIRAP) for multi-level transitions are used : alternating STIRAP (A-STIRAP) and straddle STIRAP (S-STIRAP). Both transfer dynamics are modeled and compared. The second class of strategies involves only the electronic ground state and uses infrared (IR)/TeraHertz (THz) pulses. The chemical bond is first created by the application of a THz chirped pulse or $π$-pulse. Subsequently, the molecules are transferred to their ro-vibrational ground state using IR pulses. For this last step, different optimized pulse sequences through optimal control techniques, have been studied. The relative merits of these strategies in terms of efficiency and robustness are discussed within the experimental feasibility criteria of present laser technology.
Zusammenhänge zwischen Partnerschaft, Elternschaft, Erwerbstätigkeit und der selbst eingeschätzten Gesundheit in Deutschland und der EU – Ergebnisse des European Health Interview Survey (EHIS) 2
Creators: name: Koch-Institut, Robert
Publisher: name: Robert Koch-Institut
Year: 2019
Subjects: subject: Vereinbarkeit von Familie und Beruf
subject: Selbsteingeschätzte Gesundheit
subject: Europäischer Vergleich
subject: 610 Medizin und Gesundheit

description: Partnerschaft, Elternschaft und Erwerbstätigkeit stellen drei zentrale soziale Rollen im mittleren Erwachsenenalter dar. Vor dem Hintergrund der Diskussion um multiple Rollen und die Vereinbarkeit von Familie und Beruf wird analysiert, in welcher Weise die Kombination der sozialen Rollen in Deutschland und der Europäischen Union (EU) mit der selbsteingeschätzten Gesundheit zusammenhängt. Die Analyse basiert auf Daten der zweiten Welle des European Health Interview Survey (EHIS 2), der 2013 bis 2015 in allen EU-Mitgliedstaaten durchgeführt wurde. Einbezogen wurden 62.111 Frauen und 50.719 Männer im Alter von 25 bis 59 Jahren. Mittels logistischer Regressionen wurden adjustierte Wahrscheinlichkeiten (Predictive Margins) für eine mittlere bis sehr schlechte Gesundheit in unterschiedlichen Familien- und Erwerbskonstellationen für die EU und Deutschland berechnet (bei Männern nur für die gesamte EU). Bei Frauen und Männern zeigt sich auf Ebene der EU in allen familiären Lebensformen ein Unterschied nach dem Erwerbsstatus: Nichterwerbstätige berichten am häufigsten eine mittlere bis schlechte Gesundheit, gefolgt von Teilzeitund Vollzeiterwerbstätigen. Bei Müttern mit Partnerin oder Partner fallen die Unterschiede nach Erwerbsstatus geringer aus als bei Frauen in anderen Lebensformen. In Deutschland finden sich bei Müttern keine Unterschiede in der Gesundheit nach Erwerbsstatus; dies gilt auch für Alleinerziehende. Darüber hinaus zeigen sich unterschiedliche Zusammenhangsmuster zwischen Ländergruppen, die auf Basis ähnlicher Wohlfahrtsstaatssysteme gebildet wurden.
Electrokinetic oscillatory flow and energy conversion of viscoelastic fluids in microchannels: a linear analysis
Creators: name: Ding, Zhaodong
name: Jian, Yongjun
Publisher: name: arXiv
Year: 2021
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: We study the electrokinetic flow of viscoelastic fluids subjected to an oscillatory pressure gradient, and particularly focus on the resonance behaviors in the flow. The governing equations are restricted to linear regime so that the velocity and streaming potential fields can be solved analytically. Based on the interaction of viscoelastic shear waves, we explain the mechanism of resonance, and derive a critical Deborah number Dec = 1/4 which dictates the occurrence of resonance. Using the Maxwell fluid model, we show that the resonance enhances electrokinetic effects and results in a dramatic increase of electrokinetic energy conversion efficiency. However, by applying the Oldroyd-B fluid model it reveals that the amplification of efficiency is suppressed even for a very small Newtonian solvent contribution. This may be one of the reasons that experimental verification regarding the high efficiency predicted by Bandopadhyay & Chakraborty (Appl. Phys. Lett., vol. 101, 2012, 043905) is unavailable in the literature. Furthermore, the damping effect of solvent viscosity is more significant for higher-order resonances. Introducing the factor of multiple relaxation times, we show that the occurrence of resonances for the streaming potential field and the flow rate are still dominated by Dec. For the efficiency in the multi-mode case, the occurrence of resonance is dominated by the Deborah number De and the mode number N, and the resonance disappears for small De or large N. In addition, a new type of scaling relation between the streaming potential field and EDL thickness can be identified at large De.
Berlis, Angela, Frauen im Prozeß der Kirchwerdung
Creators: name: Sattler, Dorothea
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 48 Nr. 4 (1999): Ökumenische Rundschau, Band 48, Heft 4
Bildungsunterschiede in der Prävalenz verhaltensbezogener Risikofaktoren –Wo steht Deutschland in Europa?
Creators: name: Koch-Institut, Robert
Publisher: name: Robert Koch-Institut
Year: 2019
Subjects: subject: Gesundheitsverhalten
subject: Bildungsunterschiede
subject: Erwachsene
subject: Deutschland
subject: Europäischer Vergleich
subject: 610 Medizin und Gesundheit

description: In diesem Beitrag werden Bildungsunterschiede in der Verbreitung verhaltensbezogener Risikofaktoren bei Erwachsenen untersucht und die Ergebnisse für Deutschland mit dem Durchschnitt der Europäischen Union (EU) verglichen. Datengrundlage ist die zweite Welle des European Health Interview Survey 2013 – 2015 (EHIS 2). Die Analyse erfolgte durch die regressionsbasierte Berechnung von relativen und absoluten Bildungsunterschieden in der Prävalenz verhaltensbezogener Risikofaktoren auf Basis von Selbstangaben 25- bis 69-jähriger Frauen und Männer (n = 217.215). In Deutschland und im EU-Durchschnitt sind aktuelles Rauchen, Adipositas, körperliche Aktivität unter 150 Minuten pro Woche, episodisches Rauschtrinken und nicht täglicher Obst- oder Gemüsekonsum bei Personen mit niedrigem Bildungsstatus stärker verbreitet als bei jenen mit hohem Bildungsstatus. Vergleicht man die relativen Bildungsunterschiede für diese Risikofaktoren in Deutschland mit den Ergebnissen anderer EU-Länder, so liegt Deutschland insgesamt im Mittelfeld. Die relativen Bildungsunterschiede im aktuellen Rauchen und episodischen Rauschtrinken sind bei Frauen in Deutschland stärker ausgeprägt als im EU-Durchschnitt; bei Männern gilt dies für die geringe körperliche Aktivität. Die relativen Bildungsunterschiede für nicht täglichen Obst- oder Gemüsekonsum sind hingegen bei Frauen und Männern in Deutschland weniger stark ausgeprägt als im EU-Durchschnitt. Verstärkte Anstrengungen in unterschiedlichen Politikbereichen sind nötig, um die dem Gesundheitsverhalten zugrundeliegenden Verhältnisse insbesondere für sozial benachteiligte Bevölkerungsgruppen zu verbessern und die gesundheitliche Chancengleichheit zu erhöhen.
Is the axionic dark matter an equilibrium system?
Creators: name: Balakin, Alexander B.
name: Shakirzyanov, Amir F.
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We consider an axionic dark matter model with a modified periodic potential for the pseudoscalar field in the framework of the axionic extension of the Einstein-aether theory. The modified potential is assumed to be equipped by the guiding function, which depends on the expansion scalar constructed as the trace of the covariant derivative of the aether velocity four-vector. The equilibrium state of the axion field is defined as the state, for which the modified potential itself and its first derivative with respect to the pseudoscalar field are equal to zero. We apply the developed formalism to the homogeneous isotropic cosmological model, and find the basic function, which describes the equilibrium state of the axionic dark matter in the expanding Universe.
description: Based on the talk presented on the 17th Russian Conference on Gravitation, Cosmology and Astrophysics (RUSGRAV-17)
Linear Waves in the Kerr Geometry: A Mathematical Voyage to Black Hole Physics
Creators: name: Finster, Felix
name: Kamran, Niky
name: Smoller, Joel
name: Yau, Shing-Tung
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mathematical Physics (math-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: This paper gives a survey of wave dynamics in the Kerr space-time geometry, the mathematical model of a rotating black hole in equilibrium. After a brief introduction to the Kerr metric, we review the separability properties of linear wave equations for fields of general spin $s=0, 1/2, 1, 2$, corresponding to scalar, Dirac, electromagnetic fields and linearized gravitational waves. We give results on the long-time dynamics of Dirac and scalar waves, including decay rates for massive Dirac fields. For scalar waves, we give a rigorous treatment of superradiance and describe rigorously a mechanism of energy extraction from a rotating black hole. Finally, we discuss the open problem of linear stability of the Kerr metric and present partial results.
description: 25 pages, LaTeX, 2 figures, minor changes (published version)
Schottroff, Luise / Wacker, Marie-Theres, Kompendium Feministische Bibelauslegung
Creators: name: Geiger, Michaela
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 48 Nr. 4 (1999): Ökumenische Rundschau, Band 48, Heft 4
title: IT/IS Strategy Research and Digitalization: An Extensive Literature Review
Creators: name: Teubner, Alexander
name: Stockhinger, Jan
Publisher: name: University of Muenster, Institutional Repository MIAMI
Year: 2024
Subjects: subject: 004 Computer science
subject: 330 Economics

description: IT/IS strategy is of central importance to practice and many well-developed lines of research have
contributed to our understanding of IT/IS strategy. However, throughout the last decade,
digitalization has fundamentally transformed the business world and put into question traditional
strategy wisdom. As information technologies are the driver of this digital transformation, we can
expect an even more fundamental change in IT/IS strategy thinking. To verify this expectation,
we undertook an in-depth, extensive review of the academic literature on this topic. Our review,
which is time-framed to the years 2008-2018, distils five different directions in the development
of IT/IS strategy research. It also identifies a shift in how IT/IS strategy is defined and investigated
over this period. Moreover, we present an emerging debate on how digitalization challenges
traditional IT/IS strategy wisdom. As this debate is still in its infancy, we take it further by entering
into the larger discussion on digitalization, including digital innovation, digital ecosystems, and
digital transformation. Building on this, we derive at deeper insights on how IT/IS strategy could,
should, or should better not be understood in the digital age.
description: 1 Introduction ..... 4
2 IT/IS Strategy Research and Publication Activity in the "Digital Era" ..... 6
3 Impacts of Digitalization on the IT/IS Strategy Discourse ..... 8
3.1 From Organizational to Supra-Organizational Strategies ..... 10
3.2 From Reasonably Ponderable to Turbulent Environments ..... 11
3.3 From Exploitation to Exploration ..... 12
3.4 From IT/IS Capabilities to IT-enabled Business Capabilities ..... 13
3.5 From IT/IS Strategy to Digital Strategy ..... 14
4 How Digitalization is Changing Our Understanding of IT/IS Strategy ..... 16
4.1 Traditional Conceptions of IT/IS Strategy ..... 16
4.2 IT/IS Strategy Conceptions Prevailing in the Digital Age ..... 18
4.2.1 Shared Managerial View ..... 18
4.2.2 Business Strategy Support ..... 19
4.2.3 Corporate Master Plan ..... 19
4.2.4 Departmental Plan ..... 20
5 How Does Digitalization Affect Our Thinking about IT/IS Strategy? ..... 21
6 Summary, Conclusions, and Limitations ..... 33
7 References ..... 35
8 Appendix A: Literature Sample Used for Statistical Analysis ..... 47
9 Appendix B: Methodology for the Literature Review ..... 51
10 Appendix C: Literature Sample Used for the In-Depth Literature Review ..... 56
Risk management for your (scientific) events
Creators: name: Sharan, Malvika
Publisher: name: Zenodo
Year: 2019
Subjects: outreach, community, event, planning, risk, scicomm

description: As a community manager, I have organized a number of events ranging from formal conferences, to semi-formal training events, to informal social meetings, both locally and internationally. In the last three years, I have become very comfortable with the kind of work that goes into organizing such events. I have also become quite aware of the fact that my events will face unexpected threats even though I have planned everything well. In this process, I have identified the important aspects of planning a scientific event. Furthermore, I have also created comprehensive lists of responsibilities that appear in the different stages of event organization, risk assessment, task prioritization, and risk mitigation.
 My complete notes on this topic and a related presentation are available under a Creative Commons Attribution 4.0 International License. You are welcome to use this resource in your own workflow. I will be happy to receive your comments and contribution to improve this material.
Squeezing the Local Oscillator Does Not Improve Signal-to-Noise Ratio in Heterodyne Laser Radar
Creators: name: Rubin, Mark A.
name: Kaushik, Sumanth
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The signal-to-noise ratio for heterodyne laser radar with a coherent target-return beam and a squeezed local-oscillator beam is lower than that obtained using a coherent local oscillator, regardless of the method employed to combine the beams at the detector.
description: 3 pp., no figs. Typos corrected, discussion extended, conclusions unchanged
An RMHD study of transition between prompt and afterglow GRB phases
Creators: name: Mimica, Petar
name: Giannios, Dimitrios
name: Aloy, Miguel-Angel
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We study the afterglow phases of a GRB through relativistic magnetohydrodynamic simulations. The evolution of a relativistic shell propagating into a homogeneous external medium is followed. We focus on the effect of the magnetization of the ejecta on the initial phases of the ejecta-external medium interaction. In particular we are studying the condition for the existence of a reverse shock into the ejecta, the timescale for the transfer of the energy from the shell to the shocked medium and the resulting multiwavelength light curves. To this end, we have developed a novel scheme to include non-thermal processeses which is coupled to the relativistic magnetohydrodynamic code MRGENESIS in order to compute the non-thermal synchrotron radiation.
description: 10 pages, 3 figures, proceedings of the conference "Supernovae: lights in the darkness", October 3-5, 2007, Mao (Menorca)
Effects of spacing on multi-aged interior douglas-fir stands in central British Columbia
Creators: name: Bugnot, Jean-Loup
Publisher: name: University of British Columbia
Year: 2009

description: Re-measurement data over a period of four years from 24 permanent plots were analyzed to determine the effects of three different spacing regimes on growth of uneven-aged interior Douglas-fir (Pseudotsuga menziesii var. glauca), near Williams Lake, British Columbia. Spacing was carried out during the fall and winter of 1990-1991. Growth was analyzed at the stand and individual tree level between the beginning of the 1993 growing season and the end of the 1996 growing season. Variables of interest at the stand level were growth and growth rate of quadratic mean diameter, basal area per hectare, Lorey's height, volume per hectare and accumulated crown area per hectare. Variables of interest for individual trees were growth in diameter, basal area, total height, total stem volume, crown area and live crown length. Analysis of variance was used to judge the significance of treatment effects. At the stand level, there were no significant differences among treatments for any of the variables. However, treatment means of quadratic mean diameter, basal area, volume, and accumulated crown area were consistently lower in the control plots than in the spaced plots. In the spaced plots, the 5 m clumped spacing showed consistently higher growth rates in relative terms. Stand diameter growth was 0.37 cm on the control, and ranged from 0.80 to 1.08 cm on the spaced plots. Net basal area growth averaged 2.34 m²/ha on the control, and 3.23 to 3.52 m²/ha on the spaced plots, while mortality represented 0.83 m²/ha on the control, and 0.01 to 0.22 m²/ha on the spaced plots. Spacing did not reduce net periodic annual volume increment which was 4.8 m³/ha on the control, and 5.2 to 6.6 m³/ha on the spaced plots. At the individual tree level, small Douglas-fir tree (<15 cm dbh) growth responses significantly differed between control and spacing treatments for diameter, basal area, height, and volume. Large Douglas-fir tree (>15 cm dbh) diameter and basal area growth response differed significantly between the control and the 5 m clumped spacing. Despite similar trends, results were less distinct for non- Douglas-fir species. Up to 20-25 cm dbh, volume growth efficiency increased regularly with increasing dbh on both control and spaced plots. Trees seemed to be the most efficient for the 5 m clumped spacing and the least efficient for the control. The study also showed that age distribution was clearly distinct from diameter distribution.
The Role of the Dilaton in Dense Skyrmion Matter
Creators: name: Park, Byung-Yoon
name: Rho, Mannque
name: Vento, Vicente
Publisher: name: arXiv
Year: 2008
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: In this note, we report on a remarkable and surprising interplay between the omega meson and the dilaton chi in the structure of a single skyrmion as well as in the phase structure of dense skyrmion matter which may have a potentially important consequence on the properties of compact stars. In our continuing effort to understand hadronic matter at high density, we have developed a unified field theoretic formalism for dense skyrmion matter using a single Lagrangian to describe simultaneously both matter and meson fluctuations and studied in-medium properties of hadrons. The effective theory used is the Skyrme model Lagrangian gauged with the vector mesons rho and omega, implemented with the dilaton field that describes the spontaneously broken scale symmetry of QCD, in a form consistent with the symmetries of QCD and our expectations regarding the high density limit. We analyze the restoration of scale invariance and chiral symmetry as the density of the system increases. In order to preserve the restoration of scale symmetry and chiral symmetry, signalled in our case by the vanishing of the expectation value of the dilaton, and to be consistent with the vector manifestation of hidden local symmetry, a density dependent omega coupling is introduced. We uncover the crucial role played by both the dilaton and the omega meson in the phase structure of dense medium and discover how two different phase transition regimes arise as we dial the dilaton mass.
Majorana Zero Modes in Cylindrical Semiconductor Quantum Wire
Creators: name: Lei, Chao
name: Khalsa, Guru
name: Du, Jiangfeng
name: MacDonald, Allan H.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study Majorana zero modes properties in cylindrical cross-section semiconductor quantum wires based on the $k \cdot p$ theory and a discretized lattice model. Within this model, the influence of disorder potentials in the wire and amplitude and phase fluctuations of the superconducting order-parameter are discussed. We find that for typical wire geometries, pairing potentials, and spin-orbit coupling strengths, coupling between quasi-one-dimensional sub-bands is weak, low-energy quasiparticles near the Fermi energy are nearly completely spin-polarized, and the number of electrons in the active sub-bands of topological states is small.
description: 8 pages and 7 figures
A Machine Learning Approach to Correcting Atmospheric Seeing in Solar Flare Observations
Creators: name: Armstrong, John A.
name: Fletcher, Lyndsay
Publisher: name: arXiv
Year: 2020
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Current post-processing techniques for the correction of atmospheric seeing in solar observations -- such as Speckle interferometry and Phase Diversity methods -- have limitations when it comes to their reconstructive capabilities of solar flare observations. This, combined with the sporadic nature of flares meaning observers cannot wait until seeing conditions are optimal before taking measurements, means that many ground-based solar flare observations are marred with bad seeing. To combat this, we propose a method for dedicated flare seeing correction based on training a deep neural network to learn to correct artificial seeing from flare observations taken during good seeing conditions. This model uses transfer learning, a novel technique in solar physics, to help learn these corrections. Transfer learning is when another network already trained on similar data is used to influence the learning of the new network. Once trained, the model has been applied to two flare datasets: one from AR12157 on 2014/09/06 and one from AR12673 on 2017/09/06. The results show good corrections to images with bad seeing with a relative error assigned to the estimate based on the performance of the model. Further discussion takes place of improvements to the robustness of the error on these estimates.
description: 12 pages, 8 figures, accepted for publication MNRAS
Modelling interstellar extinction and polarization with spheroidal grains
Creators: name: Voshchinnikov, N. V.
name: Das, H. K.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We calculate the wavelength dependence of the ratio of the linear polarization degree to extinction (polarizing efficiency) $P(λ)/A(λ)$ from the ultraviolet to near-infrared. The prolate and oblate particles with aspect ratios from $a/b=1.1$ up to 10 are assumed to be rotating and partially aligned with the mechanism of paramagnetic relaxation (Davis--Greenstein). Size/shape/orientation effects are analyzed. It is found that the wavelength dependence of $P(λ)/A(λ)$ is mainly determined by the particle composition and size whereas the values of $P(λ)/A(λ)$ depend on the particle shape, degree and direction of alignment.
description: 13 pages, 9 figures, aacepted for publication in Journal of Quantitative Spectroscopy & Radiative Transfer (special issue, X Conference on Electromagnetic & Light Scattering)
Consideraciones interdisciplinares sobre el estado de la terminología archivística en Colombia
Creators: name: Información, conocimiento y sociedad, Grupo de investigación
name: Múnera Torres, María Teresa
name: Betancur Roldán, María Cristina
name: Giraldo Ortiz, John Jairo
Publisher: name: figshare
Year: 2021
Subjects: subject: Information Systems
subject: FOS: Computer and information sciences

description: RESUMEN: Se presenta aquí la experiencia de un trabajo interdisciplinar entre terminólogos, archivistas y bibliotecólogos. En primer lugar, se hace una introducción al tema de la terminología archivística. Se muestra su estado, reflejado en un inventario de recursos terminológicos de referencia, en las tres lenguas de trabajo de mayor uso por parte de los expertos en archivística en Colombia: español, inglés y portugués. En segundo lugar, se aplica la metodología de trabajo para la constitución de bases de datos terminológicas. En tercer lugar, se muestran los principales resultados: base de datos terminológica monolingüe con equivalencias en inglés y portugués; sistema de conceptos de la archivística, y principales rasgos de los términos de esta área a partir de un breve análisis cualitativo y cuantitativo. Por último, se presentan, a modo de conclusión, las reflexiones surgidas del proceso de trabajo colaborativo entre expertos de distintas disciplinas. Así mismo, se precisan algunas consideraciones sobre el panorama de la terminología archivística y su proyección en el país. ABSTRACT: The experience of an interdisciplinary work between terminologists, archivists and librarians is presented here. In the first place, an introduction to the subject of archival terminology is made. Its status, reflected in an inventory of reference terminological resources, is shown in the three working languages of greatest use by archival experts in Colombia: Spanish, English and Portuguese. Secondly, the working methodology is applied for the constitution of terminology databases. Thirdly, the main results are shown: A monolingual terminology database with English and Portuguese equivalences; a system of archival concepts, and the main features of the terms of this area from a brief qualitative and quantitative analysis. Finally, the reflections arising from the collaborative work process among experts of different disciplines are presented as a conclusion. Likewise, some considerations on the panorama of archival terminology and its projection in the country are presented.
Retrodiction beyond the Heisenberg uncertainty relation
Creators: name: Bao, Han
name: Jin, Shenchao
name: Duan, Junlei
name: Jia, Suotang
name: Mølmer, Klaus
name: Shen, Heng
name: Xiao, Yanhong
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In quantum mechanics, the Heisenberg uncertainty relation presents an ultimate limit to the precision by which one can predict the outcome of position and momentum measurements on a particle. Heisenberg explicitly stated this relation for the prediction of "hypothetical future measurements", and it does not describe the situation where knowledge is available about the system both earlier and later than the time of the measurement. We study what happens under such circumstances with an atomic ensemble containing $10^{11}$ $^{87}\text{Rb}$ atoms, initiated nearly in the ground state in presence of a magnetic field. The collective spin observables of the atoms are then well described by canonical position and momentum observables, $\hat{x}_A$ and $\hat{p}_A$ that satisfy $[\hat{x}_A,\hat{p}_A]=i\hbar$. Quantum non-demolition measurements of $\hat{p}_A$ before and of $\hat{x}_A$ after time $t$ allow precise estimates of both observables at time $t$. The capability of assigning precise values to multiple observables and to observe their variation during physical processes may have implications in quantum state estimation and sensing.
description: 10 pages,4 figures
Dynamic Quantization based Symbolic Abstractions for Nonlinear Control Systems
Creators: name: Ren, Wei
name: Dimarogonas, Dimos V.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper studies the construction of dynamic symbolic abstractions for nonlinear control systems via dynamic quantization. Since computational complexity is a fundamental problem in the use of discrete abstractions, a dynamic quantizer with a time-varying quantization parameter is first applied to deal with this problem. Due to the dynamic quantizer, a dynamic approximation approach is proposed for the state and input sets. Based on the dynamic approximation, dynamic symbolic abstractions are constructed for nonlinear control systems, and an approximate bisimulation relation is guaranteed for the original system and the constructed dynamic symbolic abstraction. Finally, the obtained results are illustrated through a numerical example from path planning of mobile robots.
description: 6 pages, 1 figures, conference paper
title: Selbstaufklärungsprozesse und Horizontverschiebungen. Zur Aktualität von Max Weber in China
Creators: name: Schmidt-Glintzer, Helwig
Publisher: name: Center for Advanced Studies LMU
Year: 2021
Subjects: subject: 320 Political science
subject: FOS: Political Science

description: Auch wenn im Jahrzehnt vor dem Beginn des Ersten Weltkriegs in Europa ferne Welten und darunter auch der Orient immer näher rückten, hat sich Max Weber doch erst während des Krieges mit dem Orient und dem Fernen Osten intensiver beschäftigt. Die ursprünglich „Konfuzianismus“, dann „Konfuzianismus und Taoismus“ betitelte Studie Max Webers, später oft als seine „China-Studie“ bezeichnet, hat zunächst wenig Aufmerksamkeit gefunden.
Additional file 1 of Positive end-expiratory pressure in COVID-19 acute respiratory distress syndrome: the heterogeneous effects
Creators: name: Chiumello, Davide
name: Bonifazi, Matteo
name: Pozzi, Tommaso
name: Formenti, Paolo
name: Papa, Giuseppe Francesco Sferrazza
name: Zuanetti, Gabriele
name: Coppola, Silvia
Publisher: name: figshare
Year: 2021
Subjects: subject: Biophysics
subject: 29999 Physical Sciences not elsewhere classified
subject: FOS: Physical sciences
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Physiology
subject: 69999 Biological Sciences not elsewhere classified
subject: Science Policy

description: Additional file 1. Respiratory mechanics and physiological variables formulas; study protocol flow-chart; baseline characteristics table; additional data about PEEP 5-15cmH2O comparison; boxplot and linear regression graphs.
Surface lattice Green's functions for high-entropy alloys
Creators: name: Nöhring, Wolfram Georg
name: Grießer, Jan
name: Dondl, Patrick
name: Pastewka, Lars
Publisher: name: arXiv
Year: 2021
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We study the surface elastic response of pure Ni, the random alloy FeNiCr and an average FeNiCr alloy in terms of the surface lattice Green's function. We propose a scheme for computing per-site Green's function and study their per-site variations. The average FeNiCr alloy accurately reproduces the mean Green's function of the full random alloy. Variation around this mean is largest near the edge of the surface Brillouin-zone and decays as $q^{-2}$ with wavevector $q$ towards the $Γ$-point. We also present expressions for the continuum surface Green's function of anisotropic solids of finite and infinite thickness and show that the atomistic Green's function approaches continuum near the $Γ$-point. Our results are a first step towards efficient contact calculations and Peierls-Nabarro type models for dislocations in high-entropy alloys.
description: 15 pages, 7 figures
A pedagogia como autogoverno em Johann Friedrich Herbart
Creators: name: , Neitzel
Publisher: name: Zenodo
Year: 2021
Subjects: Johann Friedrich Herbart
Pedagogia Geral
Autogoverno

description: Apresentação que tem por base o livro NEITZEL, O. A pedagogia como autogoverno em Johann Friedrich Herbart. Fronteiras ed. Ijuí - RS: Ed. Unijuí, 2019.
Slip flow over structured surfaces with entrapped microbubbles
Creators: name: Hyväluoma, Jari
name: Harting, Jens
Publisher: name: arXiv
Year: 2008
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: FOS: Physical sciences

description: On hydrophobic surfaces, roughness may lead to a transition to a superhydrophobic state, where gas bubbles at the surface can have a strong impact on a detected slip. We present two-phase lattice Boltzmann simulations of a Couette flow over structured surfaces with attached gas bubbles. Even though the bubbles add slippery surfaces to the channel, they can cause negative slip to appear due to the increased roughness. The simulation method used allows the bubbles to deform due to viscous stresses. We find a decrease of the detected slip with increasing shear rate which is in contrast to some recent experimental results implicating that bubble deformation cannot account for these experiments. Possible applications of bubble surfaces in microfluidic devices are discussed.
description: 4 pages, 4 figures. v2: revised version, to appear in Phys. Rev. Lett
A comparative accuracy and convergence study of eigenerosion and phase-field models of fracture
Creators: name: Pandolfi, Anna
name: Weinberg, Kerstin
name: Ortiz, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 74-10, 74S10, 74R10

description: We compare the accuracy, convergence rate and computational cost of eigenerosion (EE) and phase-field (PF) methods. For purposes of comparison, we specifically consider the standard test case of a center-crack panel loaded in biaxial tension and assess the convergence of the energy error as the length scale parameter and mesh size tend to zero simultaneously. The panel is discretized by means of a regular mesh consisting of standard bilinear or Q1 elements. The exact stresses from the known analytical linear elastic solution are applied to the boundary. All element integrals over the interior and the boundary of the domain are evaluated exactly using the symbolic computation program Mathematica. When the EE inelastic energy is enhanced by means of Richardson extrapolation, EE is found to converge at twice the rate of PF and to exhibit much better accuracy. In addition, EE affords a one-order-of-magnitude computational speed-up over PF.
description: 20 pages, 6 figures
Spatial resolution of a GEM readout TPC using the charge dispersion signal
Creators: name: Boudjemline, K.
name: Dixit, M. S.
name: Martin, J. -P.
name: Sachs, K.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: A large volume Time Projection Chamber (TPC) is being considered for the central charged particle tracker for the detector for the proposed International Linear Collider (ILC). To meet the ILC-TPC spatial resolution challenge of ~100 microns with a manageable number of readout pads and channels of electronics, Micro Pattern Gas Detectors (MPGD) are being developed which could use pads comparable in width to the proportional-wire/cathode-pad TPC. We have built a prototype GEM readout TPC with 2 mm x 6 mm pads using the new concept of charge dispersion in MPGDs with a resistive anode. The dependence of transverse resolution on the drift distance has been measured for small angle tracks in cosmic ray tests without a magnetic field for Ar/CO2 (90:10). The GEM-TPC resolution with charge dispersion readout is significantly better than previous measurements carried out with conventional direct charge readout techniques.
description: 5 figures, 10 pages
The hidden X-ray breaks in afterglow light curves
Creators: name: Curran, P. A.
name: van der Horst, A. J.
name: Wijers, R. A. M. J.
name: Starling, R. L. C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: Gamma-Ray Burst (GRB) afterglow observations in the Swift era have a perceived lack of achromatic jet breaks compared to the BeppoSAX, or pre-Swift era. Specifically, relatively few breaks, consistent with jet breaks, are observed in the X-ray light curves of these bursts. If these breaks are truly missing, it has serious consequences for the interpretation of GRB jet collimation and energy requirements, and the use of GRBs as standard candles. Here we address the issue of X-ray breaks which are possibly 'hidden' and hence the light curves are misinterpreted as being single power-laws. We show how a number of precedents, including GRB 990510 & GRB 060206, exist for such hidden breaks and how, even with the well sampled light curves of the Swift era, these breaks may be left misidentified. We do so by synthesising X-ray light curves and finding general trends via Monte Carlo analysis. Furthermore, in light of these simulations, we discuss how to best identify achromatic breaks in afterglow light curves via multi-wavelength analysis.
description: 4 pages, contributed talk, submitted to the proceedings of Gamma Ray Bursts 2007, Santa Fe, New Mexico, November 5-9 2007
XIVADAGI JADIDCHILIK MAKTABLARINING VUJUDGA KELISHI VA RIVOJLANISH TARIXI
Creators: name: Qurbonnazarova, Shahnoza
Publisher: name: Zenodo
Year: 2024

description: Jadidchilik harakati namoyandalari ko’pincha o’zlarini taraqqiyparvarlar, keyinchalik jadidlar deb atashgan. O’sha davrning ilg’or taraqqiyparvar kuchlari, birinchi navbatda, ziyolilar mahalliy aholining umumjahon taraqqiyotidan orqada qolayotganligini his etib, jamiyatni isloh qilish zaruriyatini tushunib еtgandilar. Jadidchilik mohiyat eʼtibori bilan avvalo siyosiy harakat edi. Uning shakllanish va mag’lubiyatga uchrash davrlari bo’lib, ularni shartli ravishda to’rtga bo’lish mumkin. Turkiston, Buxoro va Xiva hududida bu davrlar 1895-1905; 1906-1916; 1917-1920; 1921—1929-yillarni o’z ichiga oladi.